Abstract: To improve the precision of position of a fastener hole and a seating face for mounting a counterweight, a counterweight supporting member is comprised of a support plate erected and fixed at the rear end of a revolving frame and a supporting member attached to the support plate. A cylindrical bolt fastening boss is provided on the supporting member in a manner of rotational position adjustable to the supporting plate and in which a fastener hole is formed at an eccentric position.

Abstract: The invention discloses a hydraulic control system of a leveling hydraulic cylinder of a loading head, characterized by comprising a hydraulic pump, a two-position three-way electronic control reversing valve, a three-position four-way electronic control reversing valve, a three-position four-way cam valve and a hydraulic cylinder. The invention not only can perform leveling by using the electric control system, but also comprises the hydraulic cam valve controlling the hydraulic cylinder for self-leveling, and the two leveling manners can be independently used or switched mutually, thus achieving a better leveling effect.

Abstract: Provided are a plurality of cameras (96) mounted to an upper swing structure (12) so as to be capable of shooting in different directions, a video storage device (99) for storing videos taken by the plurality of cameras, a controller (40), and a hydraulic excavator (1). The controller has a camera selection section (40a) which when a lower track structure (11), the upper swing structure (12), or a work device (1A) makes an operation, selects a camera in accordance with the operation from among the plurality of cameras (96), and a storage control section (40b) which stores videos taken by the camera selected by the camera selection section (40a) during the operation of the lower track structure, the upper swing structure, or the work device in a video storage device (99).

Abstract: A working vehicle includes a vehicle main body to which a tire is mounted, an excavation member coupled to the vehicle main body on a front side of the vehicle main body and that includes an end part arranged on an outer side of the tire in a vehicle-width direction of the vehicle main body, a hydraulic cylinder arranged at a center part in the vehicle-width direction and that is to move the excavation member, a housing that houses a power transmission mechanism to transmit power to the tire, and a camera supported by a part of the vehicle main body on a lower side of the hydraulic cylinder and on an upper side of the housing and that acquires an image of a region that includes end parts on both sides of the excavation member and that is between the excavation member and the tire.

Abstract: A work vehicle allows an operator to easily check the vertical position and the angle of bucket. The work vehicle includes a front loader with a bucket, and freely raises/lowers and rotates the bucket. The work vehicle comprises a display disposed near an operator seat. The display is configured to display vertical position information and angle information of the bucket.

Abstract: An indicator for a quick coupler for the mounting of an attachment to an earth working machine. The indicator (10) has a sensor (14,15) which, in response to movement of a movable pin engagement component (F) of a coupler (A), determines that the pin engagement component (F) will have moved sufficiently to engage and lock a pin (P2) of an attachment with the coupler (A). The indicator (10) has an indicating part (17) which is caused to be moved in response to the sensor (14,15) to thereby provide a visual indication (25) that engagement and locking of the pin (P2) has occurred.

Abstract: A system for use in securing bits against rotation in a motor grader may include a bit, with the bit having a shank. The shank may include a locking portion. The system may include an adapter board including a hole configured to receive the shank of the bit. The system may also include an anti-rotation plate configured to engage the locking portion of the shank of the bit such that the anti-rotation plate constrains the bit against rotation with respect to the adapter board.

Abstract: A shroud collar for protecting an edge of a work tool is disclosed. The shroud collar may have a first side plate. The first side plate may have a first lower leg and a first upper leg spaced apart from the first lower leg. The shroud collar may have a second side plate spaced apart from the first plate. The second side plate may have a second lower leg and a second upper leg spaced apart from the second lower leg. The shroud collar may also have an upper crossbar connected to the first side plate and the second side plate. The upper crossbar may be configured to be connectable to the work tool.

Abstract: A water supply system includes a water storage tank having a storage tank outlet, the water storage tank configured to store a volume of water at a first pressure. A pressure tank is in fluid communication with the water storage tank and is periodically fillable with water from the water storage tank. An air source is fluidly connected to the pressure tank to pressurize the volume of water in the pressure tank to a second pressure greater than the first pressure. A pressure tank output line is fluidly connected to the pressure tank to output water from the pressure tank.

Abstract: A mixing unit for a mixer tap has a first intake for a first incoming stream, and a second intake for a second incoming stream. The mixing unit mixes the first and second incoming streams in order to form an output stream, and has an outlet for the output stream. A thermostat includes a heat-sensitive portion and a translationally movable portion along an axis. A seal of the second intake is connected to the movable portion. A recess connects the outlet with the second intake and housing and is sealed by the heat-sensitive portion and the translationally movable portion. The outlet has an abutment to restrain the translational movement of the heat-sensitive portion along the axis, in a direction parallel to the axis and opposite to the seal. The abutment limits the movement of the heat-sensitive portion and the translationally movable portion outside of the recess to avoid breaking the tight seal.

Abstract: A method for operating a sanitary fitting, and to a sanitary fitting. The sanitary fitting is equipped to deliver a water jet and has at least one manual actuator for manual regulation of at least one water jet flow rate or a water jet temperature, and a sensor arrangement that is equipped for sensor-controlled regulation of a predefined water jet flow rate and a predefined water jet temperature. The sensor arrangement is equipped to detect the presence of an object in an external detection area and a control unit is provided to distinguish whether the object detected first is a water jet or a different object.

Abstract: A device used to conceal at least a portion of a wastewater strainer associated with a bathtub. More specifically, a plate having an opening therethrough is used to overlap a flange of the wastewater strainer wherein the opening in the plate generally coincides with an opening in the wastewater strainer so that the bathtub drain is unobstructed. The plate may include a downwardly extending lip to help facilitate orientation onto the flange of the wastewater strainer. The plate conceals the wastewater strainer, thereby facilitating reconfiguration of a bathtub as the existing wastewater strainer need not be removed and the plumbing system retested.

Abstract: A toilet plunger having a skirt and reinforced handle portion to prevent the collapse of the plunger and to facilitate a negative pressure being exerted against an obstruction in a toilet.

Abstract: According to one embodiment, a toilet seat device includes a toilet seat, a sterilizer, a sprayer, a blower, and a controller. The sterilizer generates sterilizing water. The sprayer sprays a mist of the sterilizing water. The blower generates a rising air stream. The controller controls the sprayer to execute first and second processes and cause a total amount of the mist sprayed in the first process to be less than that in the second process. The first process and the second process are executed at different timing. The first process includes controlling the blower to generate a first rising air stream capable of lifting the mist toward the toilet seat. The second process includes the blower not generating the first rising air stream and not lifting the mist toward the toilet seat.

Abstract: A standing water alert system comprises two conductive wires or a float extending into a drain and connected to an audible or visual alarm that is triggered when standing water is present. A drain alert system and method comprises a plurality of sensors, such as pressure or acoustic/vibration sensors, at various locations within a plumbing or fluid filtration system to measure pressure or an acoustic profile at that location and a control system to compare the measured parameters to a threshold value or range and/or to other measured parameters from nearby sensor locations. A signal is sent to a remote user or computer or an alarm is triggered when the comparison shows a potential blockage, a leak, or indicating that a filter needs to be replaced or cleaned. An approximate location of the blockage, leak, or fouled filter is determined by comparing measured parameters at nearby sensor locations.

Abstract: The present invention provides a system which allows users to mount multiple pieces of equipment to a tower and it has the unique capability to adjust a steel frame to level without additional equipment. In accordance with a first preferred embodiment, the present invention includes a duel locking system that includes a taper adjusting bolt to adjustably position the frame level with the earth. Further, the dual locking system of the present invention preferably further includes the use of retaining bolts to keep the assembly positioned correctly. According to a further aspect of the present invention, once the taper adjusting bolt is in its desired position, the retaining bolts are preferably tightened to lock the frame in place, with the taper adjusting bolt acting as a redundant measure to help maintain the level state.

Abstract: A fastening rail for embedding into a concrete element has one rail back, two rail lips and two rail longitudinal sides disposed opposite one another. The rail lips delimit a slot between them. The fastening rail is realized in an anchorless manner and forms at least one undercut from the rail back in the direction of the outside of the rail lips. To improve anchoring in concrete, the rail back has profiling on its outside which is remote from the rail lips. The fastening rail is advantageously embedded into a concrete element such that the outside of the rail lips lies flush with the surface of the concrete element. A method for making a fastening rail includes producing a profiling in at least one central region of a top side of a metal plate and reshaping the metal plate to form the rail back, rail longitudinal sides and rail lips.

Abstract: Various embodiments of the present disclosure provide a load transfer plate and load transfer plate pocket that co-act to transfer vertical or substantially vertical loads from one concrete slab to the adjacent slab in an enhanced manner by optimizing the positions of the load transfer plate relative to the adjacent concrete slabs for load transfers between the adjacent concrete slabs.

Abstract: A universal mounting system can include: a mount, a bracket, and a panel. The mount includes a horizontal flange defining a first array of bores; a vertical flange extending below and substantially perpendicular to the horizontal flange and defining an outer broad face and a second array of bores across the outer broad face; a vertical capture channel arranged on the outer broad face; an upper threaded fastener captured by the vertical capture channel; and a lower threaded fastener captured by the vertical capture channel below the upper threaded fastener. The bracket includes a first slot and a second slot; and an upper receiver and a lower receiver offset below the upper receiver arranged perpendicular to the first and second slot. The bracket is configured to fasten to the upper threaded fastener via the first slot and to fasten to the lower threaded fastener via the second slot.

Abstract: An element for thermal insulation between two building parts, including an insulating body to be arranged between the two building parts and reinforcement elements in the form of at least tensile elements, extending in the installed state of the element essentially horizontally and perpendicularly to the essentially horizontal extension of the insulating body through said body, and respectively projecting in the horizontal direction from the insulating body and here allowing a connection to one of the two building parts preferably made from concrete. The tensile reinforcement elements are formed as multi-part composite elements such that at least in the area of the insulating body they exhibit a central section projecting from the insulating body and at least partially being made from fiber-reinforced synthetic material.

Abstract: An outer shell for a composite building panel includes a tongue and correspondingly shaped groove formed on opposite side edges thereof for interlocking like panels to form a wall. The tongue extends outwardly from the side edge of the panel and has a forward portion with parallel sides which are straight and parallel to a central plane of the panel. The tongue has an intermediate portion that tapers outwardly from the parallel sides toward a side face of the panel. The tongue has a rearward portion with parallel sides. Inner faces of the groove are configured for close engagement of the forward and rearward portions of the tongue.

Abstract: A stud bridge member used in the construction industry to span horizontally between vertical metal framing components such as studs and used to brace the vertical metal framing components from various loads is disclosed. The stud bridge member has at least one gusset in a flange and at least one notch of a set of notches that engage with the vertical metal framing components providing a more firm support eliminating the use of a stud bridge clip and its associated costs and installation time for the vertical metal framing components.

Abstract: An outdoor wood decking board for use in construction of an outdoor deck floor, the outdoor decking board including a wood core formed from a first wood species of common grade wood species as a three-dimensional solid rigid body. A facing wood veneer formed from a second wood species of superior grade wood species as a three-dimensional solid rigid wood finishing layer permanently directly seamlessly attached via an adhesive to a first wood face of the wood core thereby the wood core having an appearance of the second wood species. In another embodiment, the facing wood veneer is formed from a third wood species, exotic hardwood species. A two-part emulsion polymer isocyanate adhesive is used to bond the wood core against the facing wood veneer; to bond two wood cores together. In another embodiment, the adhesive is a two-part polyurethane emulsion polymer.

Abstract: An elongated ceiling grid member and a ceiling grid assembly that includes a plurality of the elongated ceiling grid members are disclosed. The elongated ceiling grid member may include an upper portion, a lower portion and a middle portion that connects the upper portion and the lower portion. The upper portion may include a first pair of spaced and substantially parallel sidewalls having ridged interior surfaces that face each other. Similarly, the lower portion may include a second pair of spaced and substantially parallel sidewalls. Each sidewall of the second pair of sidewalls may include upper and lower ridged interior surfaces, with the distance between the upper ridged interior surfaces being different than the distance between the lower ridged interior surfaces. A plurality of the elongated grid members can be connected at their ends to form a grid of the plurality of elongated grid members.

Abstract: A structural arch having one or more elongated tension members disposed within a shell or core at or near the lowermost edge of the arch, and one or more elongated compression members disposed within the shell or core at or near the uppermost edge of the shell. The core of the arch may be hollow, or optionally, lightweight filler material or filler members may occupy the core.

Abstract: A stamped pin cap and method of manufacturing the same. There is a frame coupling together a mount, a stop flange and a cradle. The mount couples to a reinforced bar (rebar) as used in construction and the cradle receives a construction pipe, thereby coupling the construction pipe to the rebar. The cradle, in cooperation with the stop flange may mount to lumber. The stamped pin cap requires no welding or expensive molded materials and thereby may be produced cheaply and quickly.

Abstract: A customizable roof drip edge system includes an inner footing, an outer section, and a tail integrally formed with the inner footing and the outer section. The tail is nailable to a roof substrate. The outer section includes a bridging member connecting the tail to an outer footing. The bridging member and the outer footing are configured for directing the flow of water off of a roof. The inner footing is spaced from the outer footing by a suitable distance and configured to be placed against an eave as a positioning aid such that the drip edge can easily and reliably be installed with sufficient spacing for the installation of a fascia board after installation of the drip edge. The drip edge may be bendable to user-selectable angles between the tail and the inner footing and outer section to accommodate a range of roof pitches.

Abstract: Prefabricated insulated roof assemblies, methods for manufacturing such assemblies, and use of these roof assemblies in a building are described. The assemblies include a sheathing panel comprising an inset solar panel, I-joists, and a rigid foam insulation board positioned in a cavity formed by the sheathing panel and the I-joists.

Abstract: A roofing system in a building structure having a ridge vent includes strips of composite material having a base material adapted to form a hermetic seal with the top surface of a roofing section and recesses in a top surface in which an air permeable material can be positioned. A strip is applied to roof sections adjacent to each side of a ridge vent so that a ridge cap can overlay the strips in spaced relation from the underlying roof sections and be sealingly secured to the roof sections. The strip material establishes a barrier between the ridge cap and the roof sections through which air can pass, but through which the passage of rain and insects is inhibited.

Abstract: A ridge vent protection system is made to affix to an existing roof with an existing ridge vent that has an upper surface that is spaced from the existing roof surface. The system attaches to the roof and surrounds the perimeter of the existing ridge vent. The system has elongate members that are attached to the roof adjacent the lateral edges of the existing ridge vent. End caps that affix to the roof that cover the terminal edges of the existing ridge vent. The system is made from perforated metal and has a lower planar portion, an offset portion, and an upper planar portion. The upper planar portion holds down the top surface of the existing ridge vent. An optional top cover is also formed from perforated metal and overlays the entire top surface of the existing ridge vent. It is retained by the elongate members and end caps.

Abstract: A railing bracket system includes a cup that has a cup bottom wall and two opposed cup side walls. The cup is adapted to receive an end of a railing member. A cap has a first cap wall disposed between two opposed cap side walls and a tab extending from at least one side wall. The cap is adapted to cover the cup.

Abstract: Described herein are cementitious articles having an integrally formed exterior surface with ultra-smooth finish and reduced porosity and/or thickness relative to the core of the cementitious article. Described herein are also techniques and methods for producing fiber cement articles having a thin exterior shell characterized by improved smoothness and reduced porosity.

Abstract: A thermoplastic composite sheet for exterior cladding applications includes an outer layer with a thermoplastic resin composition reinforced with a high aspect ratio filler such that the outer layer has a coefficient of linear thermal expansion of no more than approximately 2.33×10?5 in/in/deg F., and a backing layer bonded to the outer layer, the backing layer defined by a foam material. The outer layer and the backing later define a body having a substantially planar outer surface.

Abstract: A pre-finished insulated panel system for cladding an exterior wall of a building, the system comprising: rectangular panels each with an insulation core and weather resistant coating defining a central portion with a panel thickness between an inside mounting surface and an exposed outside surface, the plurality of panels adapted for engagement in a series of parallel rows; each panel having: a mounting flange disposed on the top edge and on a first lateral edge of each panel, the mounting flange including: a recessed mounting groove; an inner ridge; and an outer ridge; an elongate cover flange complementary with the mounting flange disposed on the bottom edge and on an opposing second lateral edge, the cover flange including: an inner groove complementary to the inner ridge; and an outer groove complementary to the outer ridge; and mechanical fasteners within the recessed mounting groove and anchoring to the wall.

Abstract: The present disclosure provides a mortar bed gauge device, system, and method that create a predetermined mortar bed thickness. The mortar bed gauge device includes a web of extruded polymer monofilaments having indentations on a surface of the web. The mortar bed gauge system includes the web located between a substrate layer and a finish layer. The mortar bed gauge method includes supplying the web, laying the web onto the substrate layer, placing a mortar composition onto the web, and measuring the amount of composition being placed on the web by the thickness of the web.

Abstract: Methods, systems and polished overlays utilizing an uncoupling membrane between a substrate (e.g., floor) and a deposited polishable overlay. The overlay may be a self-leveling, polishable overlay. An uncoupling membrane is secured to a substrate followed by directly depositing a polishable overlay over and contacting the uncoupling membrane. The uncoupling membrane secures the polishable overlay to the substrate without use of a primer/broadcast sand layer. The polishable overlay may fill voids in the uncoupling membrane and may be deposited over the uncoupling membrane to a thickness residing above a top surface of the uncoupling membrane. The polishable overlay may be polished once cured whereby the uncoupling membrane reduces stresses in the overlay layer during polishing.

Abstract: A deck drainage system includes a bracket, a locking bead, and a sheet. The bracket includes a first leg and an elongate receiver connected to an end portion of the leg. The elongate receiver defines a substantially round cross-sectional profile. The locking bead is an elongate member that defines a slit in an outer surface thereof for receiving the sheet. The locking bead is configured to be received in the receiver.

Abstract: A clamp for installing a siding onto a building. The clamp comprises an upper frame having a nail for mounting the clamp onto the building and a lower frame having a top end pivotally connected to a lower end of the upper frame with a hook at an opposing end of the lower frame for holding a bottom of the siding. A spring is included biasing the lower frame with respect to the upper frame to angle the lower frame away from the building. In operation, the clamp is mounted onto the building and the hook is aligned to a position wherein the siding is to be installed, whereby the bottom of the siding may be placed on the hook and mounted onto the building.

Abstract: A climbing shoe for fixing a climbing scaffold to a concrete section. According to one embodiment the climbing shoe includes a first part including clamps configured for securing a track of the climbing scaffold and allowing the guided movement of the track while the climbing scaffold climbs in a substantially vertical direction. The climbing shoe includes a second part fixed to the concrete section, the first part being coupled to the second part. The first part and the second part are coupled to one another by means of a transverse guide arranged in one of said first and second parts and at least one hook surrounding the transverse guide arranged in the other one of said first and second parts, the hook and the transverse guide being able to slide with respect to one another for laterally disassembling the first part with respect to the second part.

Abstract: A shoring system for concrete slabs is disclosed. One such system includes a drop head with a beam support member which can be moved between lower and upper positions, and a wedge member which locks the beam support member in its upper position by a translational, sliding movement thereof. Wedge member includes a narrower toe portion and a wider heel portion, and the toe portion is insertable past corresponding engagement surfaces on the post of the drop head, to support the wedge member in its upper position. The beam support member has a lower surface engaged by the wedge member and such lower surface is longitudinally spaced from the upper surface of the beam support member, so that there is open space between the wedge member and the bottom surfaces of beam supported by the upper surface of the beam support member.

Abstract: A binding machine includes a wire feeding unit configured to feed a wire, a curl guide configured to curl the wire fed by the wire feeding unit around an object to be bound, a binding unit including a twisting shaft provided to be rotatable around a predetermined axis, and a gripping part provided at one end side of the twisting shaft, wherein the gripping part is configured to grip the wire curled by the curl guide and the twisting shaft is configured to twist the gripped wire so as to bind the object, a binding machine main body having one end side at which the curl guide is arranged and configured to accommodate therein the wire feeding unit and the binding unit, and a setting unit provided at an opposite end side of the binding machine main body and configured to set a predetermined operation condition.

Abstract: An automatic wall adhesion and cleaning system includes a cleaning mechanism for cleaning the outer wall of a building, and a vacuum-based wall adhesion mechanism adherable to the outer wall of the building by a vacuum suction force and adapted for carrying and moving the cleaning mechanism on the outer wall of the building. Thus, the automatic wall adhesion and cleaning system can save labor cost and eliminate the risk of human life due to rupture of the ropes of a hanging cage.

Abstract: A powered tile breaker has an adjustable frame and the frame is further comprised of a handlebar member, a foldable shaft, a base member, and wheels. The base member holds a chiseling assembly which comprises a main electric motor located inside a motor casing. The motor powers a chisel member. The chiseling assembly is angularly adjustable by way of an actuator member which consists in a secondary electric motor driving a piston. The piston has one end rotationally connected to the base member, and the actuator member is rotationally connected to a lever member which extends from the chiseling assembly and which connects at a pivot point.

Abstract: The disclosure relates to a conveyor for moving four-wheel vehicles. The conveyor includes a chassis having stowable extensions movable between a position in which the extensions make it possible to move the chassis under the vehicle and a position in which the extensions make contact with the treads of the wheels. The chassis is telescopic and includes two segments that each have a pair of arms. At least one of the arm pairs is hinged so as to enable movement between a position perpendicular to the longitudinal axis of the chassis with an extension at least equal to the track width of the vehicle and a folded-up position that is to occupy a width less than the distance between the inner flanks of the wheels of the vehicle. The segments are movable between a position where the arms are not in contact with the wheels and a position where each arm makes contact with the tread of one of the wheels so as to raise or lower the vehicle.

Abstract: A dissipator for interfacing between the ground and supporting structures, which comprises a supporting base that can be fixed to the ground and supports a contact base that can be associated, by way of kinematic connection elements, with a supporting structure, interface elements being provided between the contact base and the supporting base and being adapted to allow the movement of the contact base with respect to the supporting base at least along two directions that are parallel to the ground, control elements being further provided which act between the supporting base and the contact base and are adapted to control the relative movement between the supporting base and the contact base; the dissipator comprises at least one rod-like dissipation body that acts between the ground and the supporting structure, the rod-like dissipation body having at least partially a behavior of the dissipative type.

Abstract: A modular shelter system includes a floor panel having a first curved surface along a lateral edge on a top side of the floor panel and a first inside surface located inside of the first curved surface. The modular shelter system additionally includes a wall panel having a second curved surface along a bottom end of the wall panel, wherein the second curved surface is configured to rotate relative to the first curved surface, and wherein the second curved surface is configured to mate with the first curved surface. The wall panel further has a second inside surface located inside of the second curved surface, wherein the second inside surface is configured to mate with the first inside surface when the wall panel is erected over the floor panel.

Abstract: A post installation bracket for installing posts on a base such as a concrete slab is provided. The post installation bracket includes a leveling plate with at least one leveling element and an anchoring bolt securing assembly configured to securely receive a first end of an anchoring bolt, a second end of the anchoring bolt distal to the first end securely anchored into the base. The post installation bracket further includes at least one leveling bolt securely fastened to each of the at least one leveling elements, the at least one leveling bolt used to position the leveling plate and post with respect to the base.

Abstract: A tilt tower and pipe auger anchor assembly comprising a tilt tower having a mast and a swing tube and a coax cable engaging both the mast and the swing tube, the mast has a near end, the near end has a mast flange plate with fastener holes therethrough. A pipe auger anchor has walls defining a generally hollow elongated body having a near end and a removed end, the near end including a pipe auger anchor flange plate mateable with the mast flange plate. The pipe auger anchor flange plate has fastener openings therein and fixedly attached to the near end perpendicular to the longitudinal axis of the hollow elongated body and an auger at the removed end. The auger provides a penetration force when the body is rotated and the auger is engaged with the ground.

Abstract: The rotating headstone comprises a headstone, a rotator, and a top cover. The rotator may move the headstone between a vertical position and a horizontal position to move the headstone out of the way of landscaping crews and equipment. The rotator may comprise a plurality of pistons that expand and contract to move the top and bottom of the headstone and racks and pinions to guide the bottom of the headstone. In the horizontal position, the headstone may lie within a shell that is below ground level. When in the vertical position, the headstone may be exposed above ground and the top cover may cover the opening left by the vertical headstone. The repositioning may be initialed by a local button or by a wireless remote control. The rotator may be powered by one or more batteries which are kept charged by one or more solar cells.

Abstract: A foldable vehicle roof tent includes a base, a top portion support rack and a middle portion support rack. The middle portion support rack includes a connecting frame, middle supporting rods and top supporting rods. One end of the connecting frame is hingedly connected to a front end of the base, and the other end is hingedly connected to a rear end of the top portion support rack. A rear end middle portion of the base is provided with a connecting base. One end of each of the middle supporting rods is rotatably arranged on the connecting base, and the other ends of the middle supporting rods are symmetrically matched on two sides of the end of the connecting frame connected to the top portion support rack. The top supporting rods are symmetrically arranged on two sides of the connecting frame.