Abstract: A tool for demating multi-pin connectors includes a first fork including an inner fork member and an outer fork member operatively connected for relative movement parallel to a longitudinal fork axis. A second fork is spaced apart from the first fork wherein the second fork includes an inner fork member and an outer fork member operatively connected for relative movement parallel to the longitudinal fork axis. A handle connects the first fork to the second fork. The handle includes an outer handle member fixedly connecting the outer fork members of the first and second forks, and the handle includes an inner handle member fixedly connecting the inner fork members of the first and second forks. Relative movement of the inner and outer handle members causes relative movement of the inner and outer fork members of the first and second forks for demating multi-pin electrical connectors from sockets.

Abstract: A constrainer includes a base and two arms mechanically coupled to the base. The base and two arms receive a device while the constrainer is in a first state and, while the constrainer is transitioning from the first state to a second state and while the device is disposed in the constrainer, place the device in a predetermined orientation.

Abstract: An electrical plug removal tool/implement comprising a nonconductive faceplate having a set of apertures contoured to receive the prongs of an electrical plug. The removal implement positions between the electrical outlet and the electrical plug, with the prongs traversing the same, and is adapted to pull the plug from the outlet when flexible strings are pulled which are affixed to the faceplate. The faceplate may comprise a plurality of sets of apertures in some embodiments.

Abstract: A tool for reforming printed circuit board backplane connector pins on a rod control system. The pin reforming tool of this invention is aligned into a card cage using existing card guides and locates itself around the backplane connector. The tool uses a uniquely designed die (that can be set up for one or multiple pin applications) that precisely engages into the connector and around the pin or pins to be reformed, with the assistance of a zig zag alignment guide matched specifically for the pin spacing. A consistent reforming force is applied via a force applicator structured to provide a force of a preselected magnitude.

Abstract: Connector assemblies are described herein. For example, a connector assembly including: a housing configured to accept a first ferrule and a second ferrule. The connector assembly may also have a push/pull clip that is configure to depress a protrusion that rotates down a connector device to remove the connector assembly from an adapter. The push/pull clip is integrated with a cable boot assembly that allows a user to apply a distal force to remove or insert the connector assembly into the adapter housing. The push/pull clip is configured for use to release a MPO and LC connector type from an adapter.

Abstract: A behind-the-wall optical connector an outer housing configured to be inserted into an adapter with a corresponding inner surface, a ferrule included in an annular collar to mate with a corresponding projection at an adapter opening, and a latch attached to one side of housing configured to lock the connecter into an adapter opening. The latch is further configured with a locking channel and guide to accept a pull tab with a catch at one end, the pull tab releases the connector from the adapter opening when the tab is pulled rearward or away from the adapter.

Abstract: The disclosure provides an LED light system that is easy to install and customizable by the user. The LED lighting system may be plugged directly into an existing power source. In one configuration, the system includes a power supply that accepts standard power inputs. A low voltage bus line extends from the power supply. The user may connect LED light modules at essentially any location along a low voltage bus line of the system so that the light modules are located exactly where the user desires light. Uneven spacing is possible. Different size lights, different lumen powers, and different-colored light modules may be disposed along the low voltage bus line. Security features may be used to reduce the value of the system components to a thief.

Abstract: The present invention provides a rotating electric machine and a method of detecting electric discharge (a defect detection method for a rotating electric machine), which are able to early detect vibration sparking between a stator winding and a stator core. A rotating electric machine of the present invention comprises a cylindrical stator including a stator core and a stator winding, a rotor disposed inside the stator, at least one key bar disposed on an outer periphery of the stator core and extended in an axial direction of the stator, and at least one current detector disposed on the key bar and configured to measure a current flowing in the key bar.

Abstract: A cutting unit for stripping cables in a stripping station includes a base body and a knife holder attached thereto for holding stripping knives. The knife holder is firmly glued to the base body by an epoxy-resin adhesive, whereby the stripping knives are electrically isolated from the base body. The stripping knives are screw-connected with the knife holders. For the reading-out of electrical signals for detection of contact with a conductor the cutting unit has a printed circuit board that is electrically connected with the knife holders by contact screws.

Abstract: A plug connector has a movable unlocking structure, and a plug connector assembly includes the plug connector and two slidable locking portions to be engaged with the left and right surfaces of the plug connector respectively. The rear surface of the plug connector has two first locking units, at least one of the plug connector and the slidable locking portions has an inclined contact surface, and when the plug connector is connected to a socket connector and the slidable locking portions are engaged with the plug connector and move toward the top side of the plug connector, the rear surface of the plug connector is pushed outward with the assistance of the inclined contact surface, unlocking the first locking units from the engaging portions on the socket connector respectively.

Abstract: A tool for demating multi-pin connectors includes a first fork including an inner fork member and an outer fork member operatively connected for relative movement parallel to a longitudinal fork axis. A second fork is spaced apart from the first fork wherein the second fork includes an inner fork member and an outer fork member operatively connected for relative movement parallel to the longitudinal fork axis. A handle connects the first fork to the second fork. The handle includes an outer handle member fixedly connecting the outer fork members of the first and second forks, and the handle includes an inner handle member fixedly connecting the inner fork members of the first and second forks. Relative movement of the inner and outer handle members causes relative movement of the inner and outer fork members of the first and second forks for demating multi-pin electrical connectors from sockets.

Abstract: A maintenance tool for an insulator of a direct current transmission line comprises clamping devices and a tensioning device. The clamping devices are mounted at the two sides of the insulator through clamping, and the tensioning device is connected between the clamping devices. The clamping devices comprise a closed clamp (1), a single serial clamping device (2) and a wire end clamping device (30). The clamping device has advantages such as strong overall strength and bearing capacity, small size, light weight, and reliable working, and can be applied to replacement of various insulators on the direct current transmission line, reliably ensuring safe commissioning and regular maintenance of transmission lines.

Abstract: The invention relates to a method for fabricating a plug (18) formed from a plug housing (19) and elongate contacts (3), the contacts (3) comprising a bent longitudinal axis (23) inside the finished plug (18), characterized by: introducing front portions (3a) of the contacts (3) into contact receptacles (17) of a plug housing part (7); holding the plug housing part (7) by means of a first holding arrangement (15) of a plug fabrication device (20); holding rear portions (3b) of the contacts (3) by means of a second holding arrangement (21) of the plug fabrication device (20); pivoting the first holding arrangement (15) with the plug housing part (7) held thereby relative to the second holding arrangement (21) with the contacts (3) held thereby, whereby the longitudinal axis (23) of the contacts (3) is bent in the region between their front portions (3a) and their rear portions (3b).

Abstract: A system and a method for testing information handling systems is provided. The system includes a top cover having a memory circuit and a bottom platform for receiving a test printed circuit board assembly (PCBA) including a slot. The system includes a sensor determining the relative position of the memory circuit and the slot; and a host controller coupled to the test PCBA and the sensor through a port. A computer program product including a non-transitory computer readable medium having computer readable and executable code is also provided. The code instructs a processor in a host controller in a test fixture to load a memory circuit on a crane; engage a sub-module carrying the memory circuit; load a printed circuit board assembly (PCBA); place a memory device on a slot in the PCBA; perform a system test on the PCBA; disengage the sub-module and the test fixture.

Abstract: An electrical device removal tool, such as for circuit breakers, that is lightweight, portable, and rugged for providing electrically operated controlled insertion and removal of electrical equipment by an operator from a remote location using a coupling device for engagement with the electrical equipment housing.

Abstract: A retention-extraction device is provided for a removable card in a chassis. The device includes an actuation rod having a cam slot, the actuation rod configured to provide linear movement along the length of the actuation rod, and an extraction lever operatively connected to a proximal end of the actuation rod and pivotally secured to the chassis. The device also includes a bell crank with a cam follower that is configured to ride in the cam slot and a latch hook that pivots between an open and closed position based on the motion of the bell crank. The linear movement of the actuation rod causes the extraction lever to apply a force to a portion of the card and causes the latch hook to pivot to an open position to allow removal of the card.

Abstract: An article removal jig includes: engaging unit provided to be retractable in relation to an engaging hole provided in an article accommodating device, the engaging unit being engaged in the engaging hole such that an article-accommodating body provided in the article-accommodating device is removed from the article-accommodating device; a handle; a key member configured to be engaged with an engaged unit provided in the engaging unit provided in the article-accommodating body; a driver configured to drive the key member to disengage the engaging unit from the engaging hole; a power source mounted on the article-accommodating body which is permitted to be removed from the article accommodating device, the power source being configured to supply a power to the driver when receiving a removal permission signal of the article-accommodating body which is permitted to be removed; and a first biasing member configured to return the key member to an initial position.

Abstract: A removal device includes a wrench part, a handle part, and a thrust control apparatus. The wrench part and the handle part are in a split structure. The wrench part is rotatably connected to a daughter-board panel, and the wrench part is rotatably connected to the handle part. The wrench part includes a bayonet end and a wrench connecting end. A bayonet is provided on the bayonet end, and the bayonet is clamped on the subrack. The handle part includes a handle connecting end and a handle end. A thrust control apparatus is disposed at a junction between the wrench connecting end and the handle connecting end. The thrust control apparatus is configured to restrict motion of the handle part relative to the wrench part, and control maximum thrust when force is applied to the handle end.

Abstract: A connector release tool (100) includes a shaft (102) having a proximal end (104) defining a handle (106) and an operative distal end (108) defining a shroud portion (110). The shroud portion (110) includes sidewalls (112) extending away from the distal end (108) and terminating at a datum surface (114) and a channel (116) defined therebetween. The shroud portion (110) further includes a plurality of contact pins (118) extending away from the distal end (108) and into the channel (116) of the shroud portion (110), each contact pin (118) adapted to engage an associated push-button connector of a terminal block (20) and allow removal of one or more wires (24) coupled to the terminal block (20).

Abstract: The invention concerns a device for releasing a transceiver, fixed in a housing via a connection, from the housing, wherein the device is releasably connectable and insertable into a plug contour of the transceiver via first means and wherein the device has second means for releasing the connection between the transceiver and the housing.

Abstract: A screw locking tool is used for performing a screw locking operation of an electronic device. The electronic device has a screw hole. The screw locking tool includes a baseboard, a hollow frame, a guide rod, and a sleeve member. The baseboard has a containing space for containing the electronic device. The hollow frame is movably disposed on the baseboard. The guide rod is disposed in the hollow frame and has a guide slot formed thereon. The sleeve member is movably disposed through the guide slot and has a guide hole. The sleeve member is used for moving along a first direction to a position where the guide hole is aligned with the screw hole when the electronic device is contained in the containing space and the hollow frame covers the baseboard, so as to guide a screw to be screwed in the screw hole through the guide hole.

Abstract: A lever jig is mounted on a female connector and causes fitting force to act on the female connector and a male connector by an operation from a fitting-operation start position to a fitting-operation completion position. The lever jig includes: a connector mount portion capable of having the female connector inserted in a mounted position; slidable members that are slidably supported by the connector mount portion, hold the female connector in the mounted position, and move by a slide movement to a connector-holding release position to release the female connector from holding in the mounted position; and a lever body that is movably supported by the connector mount portion and in the fitting-operation completion position, moves the slidable members to the connector-holding release position.

Abstract: A lever jig is mounted on a female connector and fits a female connector and a male connector by an operation from a fitting-operation start position to a fitting-operation completion position so as to move the female connector and the male connector from the fitting-operation start position to the fitting-operation completion position. The lever jig includes a connector hold portion that moves between a holding position and a holding release position for the female connector, and a lever body that is operated between the fitting-operation start position and the fitting-operation completion position. In a section from the fitting-operation start position to a position just before the fitting-operation completion position for the lever body, the connector hold portion moves to the holding position, and in the fitting-operation completion position for the lever body, the connector hold portion 3 moves to the holding release position.

Abstract: A pin extractor is disclosed. The pin extractor can comprise a press to act against a clip securing a pin to be extracted. The press can have a clip interface feature at an end of the press configured to compress the clip radially inward upon application of a force against the clip. The pin extractor can also comprise a puller having a claw to engage the pin. The puller can be movable relative to the press to extract the pin as the press compresses the clip radially inward.

Abstract: The present invention discloses a disassembly mechanism including a plate, at least one guiding component, at least one constraining component and a pushing component. The plate is installed on a circuit board of an electronic device, at least one opening and a slot are formed on the plate. The slot sheathes a socket on the circuit board. The at least one guiding component is for guiding the plate to move in a guiding direction. The at least one constraining component is disposed on the at least one guiding component for constraining movement of the plate in the guiding direction. The pushing component is connected to the plate and is for moving with the plate synchronously, so as to push the expansion card to separate from the socket.

Abstract: A wrench for disengaging hooks of a number of memory slots from a number of memory cards includes a main body, a handle extending from a first end of the main body, and an arced abutting portion formed on a second end of the main body opposite to the first end. When disengaging the hooks, the abutting portion are inserted between the hooks pivotably connected to same ends of the plurality of memory slots and the ends of the memory cards and pried, to make the hooks rotate away from the memory cards.

Abstract: Apparatus for replacing a suspension insulator on a tower having a davit arm supporting an attached insulator and a conductor shoe attaching an energized conductor to the insulator lower end including a non-conductive board longer than and mounted to the tower below the davit arm, struts extending between the board and the tower, and a movable slider mounted on the board, the slider supporting a jack and a conductor lifting bar attached to the jack. Without contacting any energized components, a lineman moves the slider and operates the jack to lift and support the energized components, detaches the shoe from the insulator, moves the energized components to a remote position on the board, detaches and replaces the insulator while it is supported by a helicopter, moves the slider and operates the jack to lift the shoe into alignment with the insulator and attaches the shoe to the insulator.

Abstract: A connector of a cable (e.g., a 30-pin connector) can be used to facilitate various security-related and other functionalities. For example, a connector can include security locking mechanisms for engaging or locking the connector to a portable electronic device. A connector can additionally support the transmission of security signals, data signals, power, and/or the like. An unlocking tool can be used to disengage a connector locked to the portable electronic device. More specifically, the unlocking tool can be applied to a connector and cause the locking mechanisms of the connector to release such that the connector can be freely disconnected from a connected portable electronic device.

Abstract: The present disclosure describes various embodiments of devices for preparing cables, such as devices for pulling back the shield on an end portion of a coaxial cable to prepare the end portion for attachment to a connector. A coaxial cable, with an exposed central conductor, a dielectric insulator, and a shield (e.g., a metallic shield) can be inserted into a bore of a shield pull-back device configured in accordance with the present disclosure. As the cable is inserted into the bore, one or more gripping members can engage the cable shield and pull it back evenly without damaging the central conductor or the dielectric insulator.

Abstract: The present invention relates to ultrasound transducers for ultrasonic imaging systems and, in particular, to improved grip assemblies for ultrasound transducers. One grip assembly includes a locking plate defining first and second apertures and a coupling post extending from the locking plate. An interface plate has a first elongate extension being extendable at least partially through the first aperture and a second elongate extension being extendable at least partially through the second aperture. A handle is coupled to the locking plate and includes a grip, a coupling interface, and a neck extending between the grip and the coupling interface. The coupling interface defines a coupling aperture for receiving the coupling post.

Abstract: A disconnect tool for disconnecting a cable connector from a terminal is provided. The disconnect tool can include a body and a gripping portion at a first end of the body and perpendicular to the body. The gripping portion can be adapted to engage a cable connector. The groove can have a width greater than or equal to the cable connector. Engaging the cable connector can include positioning the gripping portion such that the gripping portion partially surrounds the outer diameter of the cable connector. The width of the gripping portion can be sufficiently narrow so as to allow the gripping portion to engage a first cable connector in close proximity to a second cable connector. For a disconnect tool engaging a cable connector, applying a force to a second end of the body in an opposite direction from the cable connector can disconnect the cable connector from the terminal.

Abstract: An adjustably mountable electrical device with one or more yokes coupled to the electrical device, at least one electrically conductive strap, and an electrical device face, wherein a distance between the electrical device face and at least one of the yoke, the strap and an electrical box mounting screw aperture is adjustable after the electrical device is mounted to the electrical box. The system may comprise mounting flanges that may have threaded hubs or the system may further comprise an electric device having front and back shells moveable on a track in response to depression of a button allowing for movement of the back shell so that the electric device may be mounted having its face coplanar with a front wall surface.

Abstract: An extractor includes an attachment portion that has at least one groove receiving a side portion of a board connected to a connector and that is attached to the side portion of the board, a tongue portion that extends from a side portion of the at least one groove in the attachment portion along the extension direction of the at least one groove and that is engaged with the inner surface of a latch, the board being pushed up by inclining toward the side of the board, and an operating portion that extends from the attachment portion in the opposite direction from the tongue portion.

Abstract: An extracting apparatus is disclosed. The extracting apparatus includes a mounting member, a handle pivotably connected to the mounting member, a latch member fixed to the mounting member and comprising a latch portion locked to the handle, and a release member slidably mounted to the mounting member and comprising an engaging portion for engaging with the latch member to deform the latch portion of the latch member, thereby releasing the latch portion from the handle.

Abstract: A lamp socket assembly tool includes an engaging end configured to engage a lamp socket inserted in an opening of a lamp housing, which may be a vehicle lamp housing. The tool includes a driving end operatively connected to the engaging end and configured to receive and transmit an axial and rotating force to the engaging end to assemble or disassembly a socket engaged by the tool relative to the housing. The tool includes a passage for receiving a connector portion of the socket such that the tool is not in contact with a connector interface. The passage may define an aperture through which a connector wire attached to the socket may exit or move freely during rotation of the socket by the tool. The engaging interface may substantially conform to a socket interface defined by a standardized filament lamp, such as an ECE H9 or H11 socket.

Abstract: An apparatus is provided comprising a base frame having a turntable, and a vertical section configured to be mounted on the turntable via a slidable mounting platform. The vertical section has a tapered wedge configured to move up and down the vertical section. The turntable is configured to rotate at least 360 degrees, and the vertical section is configured to move in a radial direction with respect to a center of rotation of the turntable.

Abstract: An apparatus for stripping metal from a cathode plate, the apparatus comprising stripping means adapted for positioning between the metal and the cathode plate in order to separate the metal from the cathode plate, and wherein movement of the stripping means is achieved through movement of a robotic arm.

Abstract: An extraction tool is provided for grasping an assembly (e.g., a circuit card assembly) having a number of openings and a number of respective connector pins extending through the openings. The tool includes one or more generally cylindrical puller structures, each having a central bore and a locking end. One or more filler rods are configured to translate coaxially within the central bore of their corresponding puller structure. The filler rod has a central bore configured to accept one of the connector pins. The puller structure is configured to extend through one of the openings such that the locking end engages the opposite side of the assembly. The filler rod is configured to translate within the puller structure, and around a connector pin extending through the selected opening, to apply outward radial pressure on the locking ends of the puller structure.

Abstract: A handing apparatus includes a handle, a tray configured to be secured to a motherboard, and a connecting rod. The connecting rod includes a clamping portion engaged with the tray. A first end of the connecting rod is rotatably secured to the handle by a first shaft, and a second end of the connecting rod is rotatably secured to the tray by a second shaft. The handle is rotatable about the first shaft relative to the connecting rod to disengage the clamping portion from the tray, so that the connecting rod is rotatable about the second shaft relative to the tray.

Abstract: A repair method for detaching a part from a board in an electronic device module having at least the board and the part bonded with the board by a press fitting process. A repair use block having a repair use through hole is placed on the part, and a repair use bolt is fastened with a repair use female thread formed in the part, in advance, through the repair use through hole. The repair use bolt head abuts against the top surface of the repair use block, then is further fastened, whereupon the part is pulled up together with the repair use female thread upward above the board. When a repair use female thread cannot be directly formed in the part, a repair use auxiliary part which is to be pulled up integrally with the part, is interposed.

Abstract: Some embodiments include a connection device for electrically coupling an electrical device to a test system. The connection device can include at least one suction cup configured to be coupled to the electrical device, spring loaded connector pins configured to electrically couple the electrical device to the test system, and a support frame coupled to the at least one suction cup and the spring loaded connector pins. The at least one suction cup can include three suction cups including a first suction cup, a second suction cup, and a third suction cup, and the support frame can include a first end coupled to the first suction cup, a second end opposite the first end and coupled to the second suction cup, and a third end between the first and second ends and coupled to the third suction cup. Other embodiments of related devices and methods are also described herein.

Abstract: A maintenance tool for an insulator of a direct current transmission line comprises clamping devices and a tensioning device. The clamping devices are mounted at the two sides of the insulator through clamping, and the tensioning device is connected between the clamping devices. The clamping devices comprise a closed clamp (1), a single serial clamping device (2) and a wire end clamping device (30). The clamping device has advantages such as strong overall strength and bearing capacity, small size, light weight, and reliable working, and can be applied to replacement of various insulators on the direct current transmission line, reliably ensuring safe commissioning and regular maintenance of transmission lines.

Abstract: A clamping apparatus includes a seat, a first guiding sleeve, a second guiding sleeve, a handle element and a clamping element. The seat includes a support portion and legs integrally formed together. The first guiding sleeve and the second guiding sleeve are mounted at opposite sides of the support portion. The handle element is slidably engaged in the first guiding sleeve and the second guiding sleeve. The clamping element is pivotally connected to one end of the handle element and is received in the second guiding sleeve in a closed position. When the handle element is slid along the seat, the first guiding sleeve and the second guiding sleeve, the clamping element moves out of the second guiding sleeve in an open position; when the handle element is released, the clamping element and the handle element automatically return to the closed position.

Abstract: A method of repairing a used electrode device is disclosed wherein a used electrode assembly has an inner conductor with an integral electrode tip; the inner conductor is encapsulated in an insulator body having an outer conductor and an outer electrode tip; and an outer sleeve is attached to the insulator body, the sleeve being filled with a particle suspended fluid and the sleeve being retained by a metal ring at the location of attachment to the insulator body prior to removing the inner conductor from the insulator body; the electrode assembly is placed in a fixture with a collet holding the metal ring in place; the sleeve is pushed upon to release the ring; and the inner conductor is pressed with the integral electrode tip while holding or restraining the insulator body to apply a force sufficient to disengage the inner conductor from the insulator body.

Abstract: A method and associated apparatus are provided for removing an auxiliary contact device from a motor starter assembly engaged with a motor controller unit of a motor control center. The method includes engaging an extraction tool with a securement member operably engaged between the auxiliary contact device and the motor starter assembly. The extraction tool includes a handle portion and a securement-engaging portion. The handle portion extends along the auxiliary contact device for the securement-engaging portion to engage the securement member. The method further includes exerting an axial force on the handle portion such that the handle portion cooperates with the securement-engaging portion to disengage the securement member from between the auxiliary contact device and the motor starter assembly, and to disengage the electrically-conductive engagement between the auxiliary contact device and the motor starter assembly, to remove the auxiliary contact device from the motor starter assembly.

Abstract: A dismounting jig adapted for removing a metal shield which is coupled with a lens module and has two projections at two opposite sides thereof. The dismounting jig has a main body and two clutching arms. Each of the clutching arms has a fixing plate and a holding portion connected with the fixing plate. A lower portion of the holding portion has a buckling slice protruded inward. Two opposite sides of the holding portion extend perpendicularly to form a pair of opposite stabilizing wings locating at a same side as the buckling slice with respect to the holding portion. The clutching arms are symmetrically mounted on the main body by the fixing plates thereof fixed on two opposite sides of the main body. A receiving space is formed among the two pairs of the stabilizing wings and the holding portions.

Abstract: An ejecting device includes a housing and a pushing mechanism received in the housing. The pushing mechanism includes a pushing component. The pushing component is movably secured to the housing for pushing an object. When the pushing mechanism is in a resisting state, the pushing component protrudes out of the housing to push the object. When the pushing mechanism is in an unresisting state, the pushing component retracts into the housing and disengages from the object.

Abstract: Coaxial cable preparation tools. In one example embodiment, a coaxial cable preparation tool is configured for use in preparing a coaxial cable for termination. The coaxial cable includes an inner conductor, an insulating layer surrounding the inner conductor, and an outer conductor surrounding the insulating layer. The tool includes a body. The body includes an insertion portion configured to be inserted between the outer conductor and inner conductor where a section of the insulating layer has been cored out. The body also includes an opening defined in the insertion portion and configured to receive the inner conductor. The body further includes means for increasing the diameter of the outer conductor that surrounds the cored-out section.

Abstract: A baffle plate disassembling instrument for an electronic device is disclosed. The baffling plate disassembling instrument for a comprises a handle; a bracket mounted on a top end of the handle; and two engaging members mounted on a top side of the bracket, the two engaging members are configure to be inserted into the baffling plate; wherein a distance between the two engaging members is adjustable according to the baffling plate.

Abstract: A clutching jig includes a pair of clutching bars, a pair of clutching pieces and a protecting means. Each of the clutching bars includes a top end portion and a bottom end portion. The top end portions are connected to each other and the bottom end portion are separated from each other. Each of the clutching pieces is fixed to the bottom end portion of each of the clutching bars. The clutching pieces are covered by the protecting means and exposed from the protecting means via the protecting means moved relative to the clutching pieces. The protecting blocks will cover the clutching pieces if the clutching jig is unused. The protecting blocks will slide upwardly relative to the clutching bars to urge the clutching pieces to be exposed if the clutching jig is used. Hence, the protecting blocks can protect the clutching pieces to prevent the clutching pieces from damage.