Abstract: An assembly for a turbomachine including an annular channel designed to form a flow duct for a flow of gas between two turbine stages of the turbomachine. The channel is bounded by a radially inner annular wall and a radially outer annular wall. The walls are connected by hollow arms that extend radially, a support having a radially outer annular part that is located radially outside the outer annular wall of the annular channel, and a radially inner annular part that is located radially inside the inner annular wall of the annular channel. The outer and inner parts of the support are connected by connecting parts that extend radially and pass through one of the hollow arms of the annular channel. The connecting parts may be connected by a connecting partition having a frangible part that ruptures when the mechanical stresses in the connecting partition are above a threshold.

Abstract: An apparatus and a process for forming an oval shaped duct, as well as a round duct for all required sizes and thicknesses for an AC system, in one continuous operation where two driving rolls advance a flat metal sheet to a multi-positioning bending roll, where the bending roll is moveable to a bending position for different curvatures and a non-bending position. The driving rolls advance the sheet through while the bending roll bends the sheet to form the curved sides, and the bending roll in the non-bending position form the flat sides of the oval shaped duct. A position sensor detects the position of the flat metal sheet in the rolls to control the location along the sheet where the bending roll is moved to either of the bending or non-bending positions while the driving rolls are stopped.

Abstract: A bearing device for wheels is configured so as to reduce an amount of deformation of an opening of an outer member while minimizing an increase in overall weight, thus preventing a deterioration in rolling fatigue life. The bearing device for wheels is provided with an outer member having double-row outer rolling surfaces, a hub ring having a wheel mounting flange and having a small-diameter stepped section, and an inner member constituted by at least one inner ring press-fitted over the small-diameter stepped section, the inner member having double-row inner rolling surfaces facing the double-row outer rolling surfaces. A band-shaped section having a predetermined band width and protruding radially by a protrusion amount is formed on at least a part of the wheel mounting flange-side outer peripheral portion of the opening of the outer member.

Abstract: A variable compression ratio apparatus, which is provided to an engine rotating a crank shaft upon receiving combustion power of a mixture from a piston for changing a compression ratio of the mixture, may include a connecting rod transferring combustion power of the mixture received from the piston to the crankshaft, and including a small end rotatably connected with the piston and a large end forming a circular hole, a crank pin, an eccentric cam disposed to be concentrically rotatable in the hole of the large end, an eccentric link at which the eccentric cam is disposed at a first end, a variable link having a first end rotatably connected with a second end of the eccentric link, a control link having a first end rotatably connected with a second end of the variable link, and a control shaft controlled by a controller and rotated together with the control link.

Abstract: An apparatus comprises a housing comprising a housing first portion and a housing second portion. The housing first portion comprises a first joint portion overlapping a second joint portion of the housing second portion so as to form a housing joint. A clamp is positioned on the housing joint and comprises a base portion. A first surface of the base portion is positioned on the housing joint. A plurality of legs extend from the base portion towards the housing each of which are spaced from each other around the housing joint. A plurality of flange segments extend from each side of the base portion away from the housing. A band is positioned on a second surface of the base portion opposite the first surface and around the clamp. The band is positioned between the plurality of flange segments and operatively coupled to the housing via the clamp.

Abstract: An aft clamp ring for a gas turbine engine is disclosed. The aft clamp ring includes a body, a forward sealing face, and an aft sealing face. The body includes an annular shape extending between an outer end and an inner end. The forward sealing face faces in a second axial direction. The aft sealing face is adjacent the outer end facing in a first axial direction and is at least partially radially aligned with the forward sealing face. The forward sealing face and the aft sealing face are each an annular surface with a surface area from 105.50 cm2 to 165.19 cm2.

Abstract: One or more ductile metal inserts may be selectively incorporated into articles of limited ductility, including metal castings and molded polymers. The inserts are positioned at joint locations for joining of the article to other articles using self-piercing riveting (SPR). The inserts are of suitable ductility, thickness and strength to receive and retain self-piercing rivets and enable a strong riveted joint between the article and a second article. In an embodiment the articles are magnesium alloy castings formed by any of sand casting, die casting and semi-solid metal casting. The chemical composition of the insert may be informed by the anticipated corrosive environment of the joint and the casting temperature of the magnesium alloy. For magnesium alloy castings which may be exposed to corrosive environments, aluminum alloy inserts are preferred.

Abstract: An extractor for placement adjacent to a rotor having processing positions in a circumferential area thereof extracts contaminants arising during container processing. The extractor has a hood forming an interior, an extractor channel, baffles, flow channels, and a joint suction channel. In operation, the hood, which does not move with the rotor, extends over part of the circumferential area. The hood's interior opens radially towards the rotor and is connected by the extractor channel to a suction device. The baffles, which are formed by wall elements in the hood interior, define the flow channels. The flow channels are open on a side of the hood that faces the rotor, and open inside the extractor hood into the joint suction channel.

Abstract: An elongated clamp for securing a flexible fabric-like shroud to a scaffold support member including two opposed jaws movable between an open and closed position by a one pin and an at-least-one wedge combination. The flexible shroud is held to the support member by the clamp's gripping force. Multiple clamps securable at different points along the various standard support members can provide positive securement of the shroud.

Abstract: A fitting (10) is formed from by clamping first and second clamp bodies (12,14) of composite plastic material together, each of the clamp bodies being covered by a pressed stainless steel shell (36,38). Each of the clamp bodies (12,14) defines a grip formation (16) that faces a recess (26), so that an edge of a glass panel can be gripped between the grip formations (16)—preferably with soft pads (18). Fasteners such as bolts pass through apertures (24,25) extend through the shells (36,38) and bodies (12,14), to hold the entire fitting (10) together and to exert a gripping force on the glass panel.

Abstract: An anti-tamper device in the form of a collar fitted about a housing is provided. The ends of the collar are formed into lock tabs, one of which is formed into a U-shaped portion, or V-shaped portion, to permit capture of the end of the other lock tab. Movement of the captured tab is prevented to resist tampering with the housing. Embodiment of the invention find application, in particular, to a housing for a bell at a railroad level crossing, and prevents loss of the bell due to vandalism.

Abstract: In a grommet for a vehicle floor cover, receptacles formed in a generally cylindrical inner surface of a female tubular body making up part of one grommet portion receive protrusions formed on a generally cylindrical outer surface of a male tubular body making up part of a second grommet portion.

Abstract: A connection arrangement (10) comprising at least two bodies (11a, 11b), in particular at least two bodies of components of a mechanical automation group of movements, to be connected to each other and a constraining group (12) of these two bodies (11a, 11b) removably to each other, wherein each of the two bodies comprises a mutual rest surface (13a, 13b) for resting on each other and a coupling profile (14a, 15a, 14b, 15b) with the constraining group (12) defined in correspondence of at least two opposite perimetric portions of the respective mutual rest surface (13a, 13b), and wherein the constraining group (12) comprises at least one pair of tightening clamps (17, 18) which are engageable with the coupling profiles (14a, 15a, 14b, 15b) and which are removably connectable together by at least one connecting member (19).

Abstract: A clamp ring and process for manufacturing a clamp ring to effectively reduce, if not eliminate, waste scrap from the manufacturing process. The clamp ring and process for manufacturing the same, results in clamp ring having a seam formed by a metal joining technique such as welding, brazing, bolting, soldering, and clinching.

Abstract: A clamp for removably securing flanges to one another includes a first clamp member having a first pivot connection positioned proximate one end thereof and an abutment portion positioned proximate an opposing end thereof, the first clamp member being configured to extend partially around the flanges. The clamp includes a second clamp member having a second pivot connection positioned proximate one end thereof and a locking assembly positioned proximate an opposing end thereof, the second clamp member being configured to extend partially around the flanges. The clamp includes a linkage pivotally connected to the first pivot connection and to the second pivot connection, such that the first clamp member is movable relative to the second clamp member and the linkage. The locking assembly includes an actuator secured to the second clamp member and having a shaft which has a locking arm secured thereto.

Abstract: A fastening device (3) for detachably fastening a medical instrument (2A-2E) to a holding structure (1) includes two crossbeams (4A, 4B), two longitudinal beams (5A, 5B) with a claw (6) for extending behind a holding surface (1A) of the holding structure. A guide (7-9) is provided, by which the crossbeams (4A, 4B) are moved in the direction of the claws (6) of the longitudinal beams during a motion of the longitudinal beams (5A, 5B) in relation to one another. A clamping structure (12) is provided for moving the longitudinal beams (5A, 5B) in relation to one another.

Abstract: A tool coupler for connecting a machine to a tool is disclosed. The tool coupler may have a first frame module having a first pair of side plates and a pair of aligned bores passing through the first pair of side plates. The aligned bores may be configured to receive pins that are connectable to a linkage of the machine. The tool coupler may also have a second frame module releasably attached to the first frame module. The second frame module may have a second pair of side plates and a pair of hooks fixedly connected to the second pair of side plates. The pair of hooks may be configured to receive corresponding pins that are connectable to the tool.

Abstract: A molded reservoir support structure coupling may include an anchor and a support structure. The anchor may have one or more first flange(s) projecting generally laterally from a side wall of the anchor. The support structure may have one or more second flange(s) projecting generally laterally therefrom. When interconnected, surface-to-surface confrontation between the first flange(s) and the second flange(s) inhibits longitudinal separation of the anchor and the support structure.

Abstract: An improved structure to fix an inflatable and elastic motion body includes an elastic air bag, a frame, a base and a plurality of restricting pieces. The base has a receiving slot recessedly formed close to a top surface of the base, and a recessed engaging trough recessedly formed close to a bottom surface thereof. The recessed engaging trough engages with a hook end of the restricting piece, so the restricting piece can tightly clamp a fixed edge of the elastic air bag. Since the restricting pieces with better strength are disposed in restricting slots of the frame to tightly confine the elastic air bag and the base to locate between the hook end and the pressing end of the restricting piece, so when the elastic air bag is heavily pressed, it would not escape from the restricting slot of the frame to increase the structural strength and durability.

Abstract: An RCD can include a housing assembly containing a bearing assembly and a rotating seal which seals an annulus between a tubular string and a body of the RCD, and a remotely operable clamp device which selectively permits and prevents displacement of the housing assembly relative to the body. A method of remotely operating a clamp device can include rotating a threaded member which is secured relative to an RCD body, and displacing a clamp section in response to the threaded member rotation, thereby selectively securing and releasing a bearing assembly and an annular seal relative to the body. Another RCD can include a rotating seal which seals an annulus between a tubular string and a body of the RCD, and a remotely operable clamp device which selectively permits and prevents access to an interior of the body, the clamp device including a motor which rotates a threaded member.

Abstract: A connection apparatus includes a first flange member having a threaded portion; a second flange member having a threaded portion; a central annular connecting flange positioned in between the first and second flanges; a pair of cross trunnion assemblies being next to and on opposing sides of the annular connecting flange; a pair of threaded collars connecting each trunnion assembly to the connecting flange and a flange; a plurality of key and slot connections that provide an interlocking interface between each flange and each trunnion assembly; and bolted connections the secure each trunnion assembly to the central annular connecting flange.

Abstract: A floating cover roof for a storage tank has a frame assembly and multiple floating units. The frame assembly has a holding frame and an outer rim. The holding frame has multiple longitudinal beams and transverse beams. Each longitudinal beam has a connecting seat, a first holding segment and a second holding segment. Two of the transverse beams are connected to two adjacent longitudinal beams to form a locating area between the beams. The floating units are mounted in the locating areas of the frame assembly, are connected to the beams of the holding frame and each has an outer casing and a body. The outer casing is mounted in one of the locating areas of the holding frame, is connected to the adjacent beams and has a casing body and a top board. The body is mounted in the outer casing between the casing body and the top board.

Abstract: In an air seeder assembly having a base mount member with a at least one base ear with a base bore, and a seed boot with at least one boot ear with a boot bore, a fastening assembly mounting the seed boot to the base mount member is disclosed. The fastening assembly comprises a fastener structure fastening the seed boot to the base mount member by extending through the base bore and the boot bore. The fastening assembly includes a fastener interface device inserted into at least one of the bores. The interface device comprises a substantially tubular insertion portion inserted into the at least one bore and a flange portion connected to the insertion portion, and extends radially outwardly from the insertion portion.

Abstract: In a grommet for a vehicle floor cover, receptacles formed in a generally cylindrical inner surface of a female tubular body making up part of one grommet portion receive protrusions formed on a generally cylindrical outer surface of a male tubular body making up part of a second grommet portion. The bottom grommet portion may have chamfered gussets formed adjacent a bottom retention flange in order to accommodate vehicle floor mats or trays of different thicknesses. Stud holes created in respective ones of the grommets receive studs of intentionally different shape or orientation, thereby militating against installation of the floor cover upside down.

Abstract: An elongated clamp for securing a flexible fabric-like shroud to a scaffold support member including two opposed jaws movable between an open and closed position by a one pin and an at-least-one wedge combination. The flexible shroud is held to the support member by the clamp's gripping force. Multiple clamps securable at different points along the various standard support members can provide positive securement of the shroud.

Abstract: A clamp for joining two hull sections is disclosed. In some embodiments, the clamp is realized by a bulkhead and a wedge, wherein the wedge forces the two hull sections into a seated position on the bulkhead. In some embodiments, the clamp further comprises o-rings for providing a pressure seal.

Abstract: A coupler assembly is provided for coupling components in a power transmission system, such as a rack and pinion drive system. The coupler assembly includes a floating mount and a pair of clamp members movable between an unfastened configuration in which the floating mount is adjustably supported between the clamp members and a fastened configuration in which the floating mount is fixedly secured between the clamp members. At least a pitch and a yaw of the floating mount are adjustable when the clamp members are in the unfastened configuration. Methods and systems which relate to or include the aforementioned coupler assembly are also provided.

Abstract: A connecting and separating device includes: a clamp band which connects an installation member of a launch vehicle and a structure installed on the installation member; and a first connecting section in which end portions of the clamp band are connected and separated. The first connecting section includes: a rotation section which is rotatable around an axis perpendicular to a plane containing the clamp band direction; and a rotating and holding section which sets the rotation section to a rotation inhibited state or a rotation permitted state. When the end portions are connected, the end portions are connected to the rotation section from opposite directions to each other, and the rotating and holding section sets said rotation section to the rotation inhibited state. When the end portions are separated, the rotating and holding section sets the rotation section to the rotation permitted state, and the end portions leave from the rotation section through the rotation of the rotation section.

Abstract: The invention relates to an assembly for holding the interface of a stationary outer structure (15) of a nacelle (3) and housing (27) of a jet engine (5), said assembly including: a first raised element belonging to the upstream end of the stationary outer structure (15); a second raised element belonging to the downstream end of the housing (27), said first and second raised elements being formed so as to be placed in contact with each other; two half-rings (109) formed by a wall defining a recess that is formed so as to receive the first and second raised elements when the housing (27) and the stationary outer structure (15) are mounted edge to edge; and an abutment means formed so as to keep the first and second raised elements in the recess.

Abstract: A device for connecting two components, comprising at least one leg, which has a fastening opening and which is connected to at least one holder, further comprising a pin receptacle for receiving a fastening pin which can be guided through the fastening opening, wherein the leg and the pin receptacle delimit between each other a receiving slit for a first component, and wherein the leg, on its side facing away from the receiving slit, has at least one abutment surface for a second component, wherein in each case at least two guiding bars run along two opposing sides of the pin receptacle, and these guiding bars connect the pin receptacle to the holder such that it can be moved elastically in its axial direction.

Abstract: In an air seeder assembly having a base mount member with a at least one base ear with a base bore, and a seed boot with at least one boot ear with a boot bore, a fastening assembly mounting the seed boot to the base mount member is disclosed. The fastening assembly comprises a fastener structure fastening the seed boot to the base mount member by extending through the base bore and the boot bore. The fastening assembly includes a fastener interface device inserted into at least one of the bores. The interface device comprises a substantially tubular insertion portion inserted into the at least one bore and a flange portion connected to the insertion portion, and extends radially outwardly from the insertion portion.

Abstract: An elevator car consists of a floor, side walls, a back wall and a roof which are each constructed in a modular manner from a plurality of panels and which can be held together by means of connecting elements. The floor is formed from, in total, eight floor panels. The threshold is connected with the floor panels. The side walls each consist of ten wall panels. The back wall consists of eight wall panels and the roof consists of six roof panels. On site, the elevator car can be constructed in a short assembly time by means of plug connections and with a few screw connections. The panel mode of construction enables a low-volume transport of the elevator car to the construction site directly from the punching and changing machine.

Abstract: The invention relates to a shaft and hub connection (20) for transmitting torque, a common longitudinal axis (X-X) comprising the following components: a shaft (22) which rotates about the longitudinal axis (X-X) and comprises an entraining longitudinal section having an untrue outer contour (26), and a hub (24) that is coaxial to the shaft (22) and encloses the shaft (22) with its internal contour (28) at least in the area of the entraining longitudinal section. The invention is characterized in that the outer contour (26) of the entraining longitudinal section of the shaft (22) and the inner contour (28) of the hub (24) have the shape of a perfect cone to such a degree that, when the shaft (22) and the hub (24) are assembled, they automatically self-lock, thereby holding the shaft and hub connection (20) together. The connection also comprises connecting means which prestress the shaft (22) and the hub (24), when assembled, in the direction of the longitudinal axis (X-X).

Abstract: An elongated clamp for securing a flexible fabric like shroud to a scaffold support member including to opposed jaws movable between an open and closed position by a pin and wedge combination. The flexible shroud is held to the support member by the clamp gripping force. Multiple clamps securable at different points along the various standard support members provide positive securement of the shroud.

Abstract: An apparatus for joining high pressure ducts has a first and second bar secured to adjacent to be joined ducts. A coupling mechanism having a U-shape is frictionally engaged onto the first and second bar. An end of the coupling mechanism frictionally engages the surface of the bar members so that the coupling mechanism is slidably removably connected to the first and second bars.

Abstract: A panel clamp assembly includes a primary panel clamp and at least one secondary panel clamp releasably-connected to the primary panel clamp. The primary panel clamp includes a clamp member having a pair of jaws and a web interconnecting the pair of jaws to each other in a manner to form a generally U-shaped configuration and to define a channel therebetween and a support member extending longitudinally and parallel to the web and connected to the clamp member. The at least one secondary panel clamp includes a clamp member, similar to the one above, and at least one hook-shaped fastener connected to the clamp member and sized and adapted to be releasably connected to the support member of the primary panel clamp.

Abstract: A connection device for a tire-building drum significantly improves work efficiency for connection and disconnection of a tire-building drum, with requirements for safety, cost, durability, occupied space, etc. sufficiently satisfied. The device connects a center shaft of a tire-building drum to a drive shaft on the building machine body side, where counter lock portions fitting into each other are provided on shaft ends of both shafts that are brought into contact with each other. One end portion of a tubular member is screwed to a head portion of the drive shaft, and cam rollers rotatable about center axes oriented in the radial direction are provided on an inner peripheral surface of the other end portion. At one end portion of the drum center shaft, there is provided a flange that is pressed by the cam rollers to the drive shaft side when the tubular member is displaced by tightening.

Abstract: Vanes are generally hollow with a passage through which service pipes extend. These service pipes must be connected such that they can allow for thermal expansion and contraction but also anti rotation features are needed in order to prevent damage when a supply coupling is connected through a pipe end. This anti-rotation feature is generally provided between a top hat and a pipe end through flanges. In order to allow reduced spacing between the top of the vane and a casing the flanges are arranged to allow at least recessing of a first flange into a passage opening profile whereby those flanges inter-engage with second flanges at a surface interface to prevent rotation.

Abstract: A handlebar grip for a transportation vehicle includes a grip body having a body portion and an annular flange provided on one end of the body portion, a tightening member mounted on the outer surface of the annular flange, a locating ring mounted on the outer surface of the annular flange in such a way that the tightening member is placed in between the locating ring and the annular flange, and a fastener inserted into a through hole of the locating ring. When the fastener is fastened up, one end of the fastener leans against the outer surface of the tightening member such that the annular flange of the grip body is pressed by the tightening member to be radially inwardly deformed and compressed against the periphery of a handlebar of the transportation vehicle. Thus, the handlebar grip is firmly fixed to the handlebar of the transportation vehicle.

Abstract: The invention relates to an assembly of a fixed pane on a car body flange and to a fastening clip for mounting the fixed pane which has a molding arranged on the pane circumferential edge and wherein on the molding at least one retaining member facing towards the body flange is provided for accommodating said fastening clip before the fastening clip for mounting the pane to the body flange is fixed in an insertion through-hole of the body flange in an automatically locking manner.

Abstract: A flanged connection and a method of fixing a gas-filled spring in a machine tool. The flanged connection includes an upper flange half and a lower flange half that can be joined together, each having a through-opening intended to receive the gas-filled spring, and a locking ring intended to secure the gas-filled spring by insertion into a groove of complementary design around the gas-filled spring and fixing between the flange halves. The locking ring is supplemented by a fixing element designed to apply a clamping force around the gas-filled spring when joining the flange halves together.

Abstract: Provided is a device for attachment to tubular connections that serves to ensure the securing of the connection and the avoidance of inadvertent disconnections. Also provided is an endotracheal tube having a releasable locking device component that serves to ensure security of the connection of the endotracheal tube to a breathing system. Also provided is a breathing system having a releasable locking device component that when employed ensures the security of the connection.

Abstract: A fitting for transverse joining of two L-shaped sections is provided, each L-shaped section with a web part and a foot part. The sections are disposed with the web part back-to-back, being peculiar in that the fitting substantially includes a first flange and a second flange which are J-shaped and which in mutual contact are slidingly connected with a connection for constituting a largely C-shaped fitting with a gap of variable length for accommodating the two foot parts of the L-shaped sections. The fitting includes means for mutual fixation of the two flanges for retaining the length of the C-shaped fitting after receiving both foot parts in the C-shaped fitting.

Abstract: A device for fastening an attachment to a support part has a clamp (1) which has a base plate (2) and two leg arrangements arranged on opposite sides of the base plate (2) and having inner legs (5, 6) and outer legs (9, 10). Furthermore, there is an engagement unit having a bearing piece (14) that can be connected to the attachment and having a locking part (26) displaceably mounted in the bearing piece (14). The locking part (26) has at least two locking feet (29) and is arranged free of effective engagement relative to the clamp (1) in a release position and is in engagement with the clamp (1) in a locking position with the locking feet (29) in such a way that at least one respective locking foot (29) blocks a movement of an outer leg (9, 10) in the direction of the inner leg (5, 6) connected to it. As a result, very reliable manipulation and high pull-out strength are achieved.

Abstract: Cylindrical portions 34 are formed on a leg plate 20 side of plural opposition walls 32 formed on a sensor holder 24. Pins 40 are formed coaxially with the cylindrical portions 34 on the side of the opposition walls 32 opposite from the side facing the leg plate 20. When a sensor cover 44 is to be attached to the leg plate 20 in a state where the cylindrical portions 34 have been fittingly inserted into through holes 38 in the leg plate 20, cross ribs 56 formed on the sensor cover 44 in correspondence to the pins 40 push the pins 40 and cause them to enter the cylindrical portions 34. Thus, the diameters of the cylindrical portions 34 are expanded, whereby the sensor holder 24 is fastened/fixed to the leg plate 20.

Abstract: A pipe fitting of the present invention comprises a combination of a plurality of split fittings and has a central cylinder and an extended cylinder which outwardly projects from the central cylinder, the central cylinder and the extended cylinder being capable of receiving pipes from orthogonal directions with respect to each other. The extended cylinder includes a bolt hole which locates near the central cylinder and which penetrates the extended cylinder. The central cylinder has an aperture provided in a side surface thereof. Each split fitting is fixed on the pipes by a bolt and nut via the respective bolt hole.

Abstract: A hub for removable mounting onto a shaft uses a locking ring having an inner diameter that surrounds the shaft and frictionally engages the shaft to fix the locking ring against the shaft axially and rotationally, a first annular hub component that is mounted to the locking ring, and a second annular hub component that is mounted to the first annular hub component.

Abstract: A tool assembly is provided for working on underground pipes, through a small hole at the pipe surface, by means of an elongate handle member that reaches into the hole, and has a coupling at the lower end thereof, whereby various ones of selected tools may be quickly connected to and disconnected from the lower end of the handle member, by means of a universal coupling, and whereby the tools can be pneumatically driven from above ground.

Abstract: In a peripheral connecting region of two sheets including two overlapping flanges of the sheets, the sheets are connected to each other such that they cannot be displaced relative to each other. In order to be able to connect high-strength sheets or other sheets which can be difficult to weld to each other, the sheets are connected in the connecting region by a strip-shaped fastening element. The strip-shaped fastening element encloses the outer contour of the flanges and rests with some sections of its inner side on mutually remote surfaces of the two flanges. A method for producing the connecting region is also proposed.

Abstract: With a view to providing an X-ray irradiator superior in workability in mounting a collimator box to an X-ray tube, the X-ray irradiator includes: a ring provided on an entry plate of the collimator box so as to surround an X-ray incidence window, the ring receiving therein a flange of the X-ray tube and having plural slots formed radially through the ring; plural tongue pieces inserted through the slots from outside to inside of the ring and holding down the back side of the flange; and a pair of half-rings which holds the plural tongue pieces at positions outside the ring and which, when one ends and opposite ends thereof are respectively opposed to each other, surrounds the ring with the plural tongue pieces inserted respectively into the plural slots.