Abstract: A vehicle includes a cockpit module skin, a cross-bar and a vehicle tracking unit. The cockpit module skin separates a passenger compartment into a first area and a second area. The cross-bar is supported to a vehicle body component in the first area. The vehicle tracking unit has an electric tracking module and a mounting bracket supporting the electric tracking module to the cross-bar.

Abstract: An assembly facilitating installation of a steering column on an original passenger's side of a truck cab includes an aftermarket dash panel having a steering column opening configured to be located on the original passenger's side of the truck cab and an HVAC access opening configured to be located on an original driver's side of the truck cab. A first bracket has a forward portion for connection to original HVAC ductwork of the truck cab and has a rearward portion for connection to the aftermarket dash panel. The aftermarket dash panel comprises a single piece that extends from a left side of the truck cab to a right side of the truck cab. A method for moving a steering column of a truck cab from an original driver's side of the truck cab to an original passenger's side of the truck cab is also described.

Abstract: The present invention relates to a vehicle cockpit module assembly in which a center speaker is seated, and the vehicle cockpit module assembly includes a cowl crossbar assembly fixed to a side portion and a dash panel in a vehicle body, a duct connecting part integrally coupled to the cowl crossbar assembly, an air conditioning module coupled to the duct connecting part to supply external air to the duct connecting part, a defrost duct coupled to an upper portion of the duct connecting part, and a connection duct having a center duct coupled to a front surface of the duct connecting part and a side duct coupled to each of both side portions of the duct connecting part.

Abstract: A support structure for a motor vehicle instrument panel support having a support part, which follows the longitudinal extension of the instrument panel support, and a metal connector for connecting the support part to another structure. The support part is made of a different material than the metal connector. The metal connector has a multi-part construction including a base part and a bracket part. The base part has a support part connection surface supported on the lateral surface of the support part. The bracket part encloses the support part opposite to the support part connection surface to provide a support part enclosure together with the support part connection surface of the base part. The metal connector is connected in a materially bonded manner to the support part in the area of its support part enclosure. The bracket part is connected to the base part via a joining process using heat.

Abstract: An instrument panel support for installation between the two A-pillars of a motor vehicle. The instrument panel support comprises a crossmember which extends between the A-pillars and has at least one connecting member at each end for connecting the instrument panel support to the vehicle via fasteners. The connecting members have a U-shaped main body connected to the crossmember, its longitudinal axis aligned in the z-direction, with at least one support insert extending between the two wings and penetrated by a fastener for connecting the instrument panel support on the vehicle side. The opening side of the main body points in the transverse direction to the longitudinal extension of the crossmember. The support insert and the spine of the main body have fastening apertures aligned with one another at least in regions for passing the shank of a fastener therethrough.

Abstract: A steering support includes a body portion provided with an internal space, and first and second fastening portions. The first fastening portion is provided to form a first steering fastening portion configured to fasten the body portion and a steering of a vehicle. The second fastening portion is provided to form a miscellaneous member fastening portion configured to fasten the body portion and a miscellaneous member of the vehicle. At least part of the first steering fastening portion and at least a part of the miscellaneous member fastening portion are located on a substantially straight line that passes through the internal space.

Abstract: A lightweight cowl crossbar includes: a first cowl crossbeam located on a first side frame disposed at a first side of a vehicle body; a second cowl crossbeam fastened to the first cowl crossbeam and fixed to a second side frame disposed at a second side of the vehicle body; a support leg located on the second cowl crossbeam and configured to be supported by the vehicle body, and a drawing block part located on a region where the first cowl crossbeam and the second cowl crossbeam overlap.

Abstract: An instrument panel assembly comprising: a crossmember (2) including a first beam (4) and a second beam (6), a center support assembly (8) with a first structural arm (30), a second structural arm (32), and a center support bracket (34); wherein the first beam (4) is hollow and has a larger diameter than the second beam (6), and the second beam (6) is adapted to slide into the first beam (4).

Abstract: A cross-member structure for a vehicle is disclosed. The cross-member structure may comprise a beam structure (e.g. generally horizontal cross-member when installed) and a support (e.g. generally vertical when installed). The cross-member structure may provide support for an instrument panel and/or may integrate with vehicle systems. The cross-member structure may provide a set of sections/segments (e.g. section structures) for integration within the structure of the vehicle and with vehicle systems. The beam structure may comprise a set of mounting structures, a beam structure section, a steering system section, an intermediate section and an airbag system interface structure section. The cross-member structure may be configured with an arrangement of beam/structure sections, mounting sections, and structural elements including members, webs, flanges, stiffeners, reinforcement, plates, walls, surfaces, etc.

Abstract: A connecting member includes at least one of a tilting allowing structure configured to allow tilting of the connecting member, a buckling allowing structure configured to buckle at a first portion of the connecting member and a bending deformation allowing structure configured to allow the connecting member to be bent at a second portion of the connecting member. When a force equal to or larger than a predetermined force is loaded on the connecting member, an upper portion of an instrument panel can be deformed without being resisted by the connecting member. Further, the connecting member is constructed such that the connecting member does not buckle when a force smaller than the predetermined force is loaded on the connecting member. Therefore, the upper portion of the instrument panel can be prevented from being deformed downward at a normal operating state.

Abstract: A vehicle front pillar structure includes a pair of front pillars disposed on both sides of a vehicle to oppose each other. An instrument panel reinforcement to which a steering portion is attached extends between the pair of front pillars (A-pillars). Each of the A-pillar includes an outer reinforcement disposed on a transversely outer side of the vehicle, an A-pillar inner portion disposed on a transversely inner side of the vehicle, and a reinforcing bracket attached to the outer reinforcement and the A-pillar inner portion. The reinforcing bracket is disposed at a position opposing an end portion of the instrument panel reinforcement.

Abstract: The present invention relates to a method for producing an instrument panel support comprising a receiver for an attachment, in particular a head-up display, wherein the instrument panel support is configured as an elongated component extending in the motor vehicle transverse direction, characterized by the following method steps: producing an instrument panel support as a welded component with fastening points at the ends for coupling to a motor vehicle body and at least two protruding arms for receiving the head-up display, inserting the welded component with the fastening points in a calibration tool, moving a die toward the arms, moving one respective stamp die toward the opposing side of the arms and pressing the stamp die against the die, wherein receiving surfaces are stamped in the arms for receiving the head-up display, removing the instrument panel support.

Abstract: There is provided in a preferred embodiment a mounting brace assembly for securing a steering column member to a vehicle cross-support member in a position braced against a vehicle cowl top. The assembly includes a cowl top bracket for engaging the vehicle cowl top, and a mounting base arm extending longitudinally along a base axis from a first axial end portion to a second axial end portion. The base arm includes an anchor flange sized for generally upward mated insertion in at least part of a flange receiving slot. The cowl top bracket is coupled to the base arm proximal to a vehicle forward end, and includes a load transfer portion shaped for juxtaposed abutment with a load bearing portion of the vehicle cowl top. Contact between the cowl top bracket and the vehicle cowl top transfers rotational bearing forces from the assembly towards the vehicle cowl top.

Abstract: The present invention relates to a dashboard crossmember (1) for a vehicle, including a crossbar (2) as well as at least one connection flange (3) designed to enable said crossbar to be attached to the body of said vehicle, said crossmember being characterized in that said crossbar (2) includes a bearing web (10) made of a fiber-reinforced composite material including continuous libers (7) arranged within a matrix (8), and preferably results from the assembly of a plurality of preformed basic parts (13, 14, 15) each produced by bending a composite material lap piece (11) about a single direction of the space so as to avoid overstretching or dislocating the network of fibers (7) of each of said laps.

Abstract: An instrument panel for a vehicle is provided. The instrument panel has a visible side and a rear side. The rear side has at least one free-space portion and at least one fastening portion, and the instrument panel can be fastened in the fastening portion to a vehicle structure of the vehicle. The instrument panel comprises at least one foam body, and the foam body is formed to be elastically deformable. The foam body is arranged between the visible side and the rear side and forms elastically deformable regions on the visible side, and the foam body forms additional elastically deformable regions in the at least one free-space portion on the rear side.

Abstract: An assembly for attaching a steering column for a motor vehicle that is to be attached to a cross-member of a firewall and to a bottom cross-member of a window opening. The assembly includes a support member that extends substantially vertically, which is to be attached to the firewall cross-member and to the bottom cross-member of the window opening, and which supports a mechanism for attaching a plate of the steering column.

Abstract: A support structure is configured for locating an instrument panel within a passenger compartment of a vehicle. The support structure includes a support bracket and an end bracket. The support bracket is attached to a body panel of the vehicle. The support bracket includes a lateral biasing guide. The end bracket is attached to an end of the instrument panel. The end bracket has a first side. The first side abuts the lateral biasing guide of the support bracket such that the lateral biasing guide biases the instrument panel in a lateral direction until the end bracket abuts the lateral datum surface of the first body panel.

Abstract: A steering support member according to the present invention supports a steering shaft, extends in a vehicle width direction and is fixed at both ends to lateral sides of a vehicle, is molded of a light alloy or a resin composite material. And the steering support member includes a fixing portion having a shape of a truncated cone that extends toward a vehicle front side from the vicinity of a position supporting the steering shaft, a top of the fixing portion being fixed to a dash panel delimiting an engine room in a vehicle front portion, and a plurality of reinforcing ribs that are arranged upright along tangents to a circle constituted by the top of the fixing portion and to a bottom circle.

Abstract: A structural part, in particular a structural part designed as a transverse supporting member for connection between the A columns of a motor vehicle and, more in particular as a structural part in tailgates or bumper supporting members, is to be developed in such a way that it has low weight, high mechanical stability and rigidity and is simple and inexpensive to produce. To do this, the structural part (1, 1?) is designed with a number of elongated closed or half-open synthetic material structures (2, 3), which in outer regions (4, 5) surround reinforcing filaments (6) running in the longitudinal direction (A) sectionwise, wherein the reinforcing filaments (6) are held form-lockingly in the respective synthetic material structure (2, 3) by means of formations (7) in their surface, so as to absorb tensile forces in bending of the structural part (1, 1?).

Abstract: An instrument panel trim apparatus mounts in a vehicle to frame an instrument cluster above a collapsible steering column. An integrally molded plastic panel has an upper collar section, a lower bridge section, and a shroud section, wherein the upper collar section and lower bridge section are configured to form a frame around the instrument cluster. The upper collar section and lower bridge section converge along a pair of tear seams. The shroud section extends downward from the lower bridge section and has an arched shape to receive the steering column. A plurality of risers are disposed between the shroud section and the lower bridge section for concentrating stress at the tear seams when the shroud section is impinged by the steering column when collapsing, so that the tear seams separate and the lower bridge section and the shroud section can deflect upward.

Abstract: A mounting system for aligning and suspending an HVAC module onto a cross car beam is provided. The mounting system may include a first mounting feature attached to the HVAC module and a second mounting feature attached to the cross car beam such that the second mounting feature is inserted into the first mounting feature to align the HVAC module with the cross car beam and to suspend the HVAC module from the cross car beam.

Abstract: The present invention relates to an instrument panel support assembly (1) in a motor vehicle, comprising a transverse tube (2) extending substantially between the A-columns of the motor vehicle and configured for receiving a steering column, air bags, a fuse box and/or an instrument panel, wherein the instrument panel support assembly (1) is characterized in that an extruded retainer profile made of a light metal alloy encloses the transverse tube (2) at least in sections, wherein the retaining profile extends in sections in the axial direction of the transverse tube (2).

Abstract: The invention relates to a device for fastening a compressible areal structure to a body part of a vehicle having at least one connecting element and at least one counterpart element, which subject to fixing a compressible areal structure to a body part can be connected to each other. It is provided that the counterpart element comprises a mounting, into which the connecting element for connecting to the counterpart element can be inserted, wherein the mounting allows a movement of the connecting element relative to the counterpart element subject to maintaining the fixing of areal structure and body part. The invention furthermore relates to an arrangement of body part, compressible areal structure and at least one device for fastening the areal structure to the body part. The body part can be a window support, in particular for the windshield of a vehicle, and the areal structure can be a sound/and a heat-insulating structure.

Abstract: An assembly for attaching a steering column for a motor vehicle that is to be attached to a cross-member of a firewall and to a bottom cross-member of a window opening. The assembly includes a support member that extends substantially vertically, which is to be attached to the firewall cross-member and to the bottom cross-member of the window opening, and which supports a mechanism for attaching a plate of the steering column.

Abstract: A working vehicle attachable an implement includes a steering wheel which is disposed in a rear side of an engine hood covering an engine compartment for accommodating an engine, a control panel which is disposed near the steering wheel, a joy-stick control lever which is disposed in a rear side of the engine hood and in a lateral side of the steering wheel, a valve which is disposed in the rear side of the engine hood and is connected to the joy-stick control lever, a top cover which is disposed below the control panel, a bottom cover which includes a portion standing up from a floor surface and is a front portion of a floor part, and a middle cover which is disposed between the top cover and the bottom cover, wherein the valve is covered by the top cover and the middle cover, and the middle cover is detachable.

Abstract: A road vehicle has an instrument panel substrate supported by a sheet metal body cowl. The body cowl is configured to be supported by a firewall of the vehicle. A fastener joins the instrument panel substrate and the body cowl comprising a magnetic member mechanically affixed to one of the instrument panel substrate or the body cowl at a predetermined location. The magnetic member attaches with a substantially horizontal magnetic surface of the other one of the instrument panel substrate or the body cowl. The magnetic member vertically separates from the magnetic surface in response to an impact force applied against the body cowl that is greater than a predetermined force. Furthermore, the magnetic attachment of the magnetic member to the magnetic surface prevents separation below the predetermined force. Thus, the conflicting demands of squeak and rattle performance versus pedestrian protection are easily satisfied.

Abstract: The present invention relates to an instrument panel support assembly (1) in a motor vehicle, comprising a transverse tube (2) extending substantially between the A-columns of the motor vehicle and configured for receiving a steering column, air bags, a fuse box and/or an instrument panel, wherein the instrument panel support assembly (1) is characterized in that an extruded retainer profile made of a light metal alloy encloses the transverse tube (2) at least in sections, wherein the retaining profile extends in sections in the axial direction of the transverse tube (2).

Abstract: A support structure is configured for locating an instrument panel within a passenger compartment of a vehicle. The support structure includes a support bracket and an end bracket. The support bracket is attached to a body panel of the vehicle. The support bracket includes a lateral biasing guide. The end bracket is attached to an end of the instrument panel. The end bracket has a first side. The first side abuts the lateral biasing guide of the support bracket such that the lateral biasing guide biases the instrument panel in a lateral direction until the end bracket abuts the lateral datum surface of the first body panel.

Abstract: A front structure for a vehicle includes a cowl panel which has at least a front wall and a bottom wall and which opens toward a top of the vehicle, a dash panel which has an upper end portion which is joined to the front wall of the cowl panel in an overlapping relationship in a vehicle length direction, and a patch which has a lower end side which is joined to the dash panel and an upper end side which is joined to the bottom wall of the cowl panel to form a closed cross-section in conjunction with the dash panel and the bottom wall.

Abstract: The invention relates to a transverse element comprising: a crossmember (2) designed to support a motor vehicle instrument panel, chiefly comprising a tubular element; and at least one support element (28), having the shape of an L, designed to support one end of said tubular element and intended to be fixed to a front pillar (8) of said vehicle. According to the invention, the transverse element comprises a first reinforcing element (48) designed to connect a first branch (30) of the support element to the crossmember (2) and a second reinforcing element (50) designed to connect the second branch (32) of the support element to the crossmember (2).

Abstract: A energy-absorbing footrest in a vehicle includes a footrest plate, a plurality of pins depending from an underside of the footrest plate, and a supporting structure defining a plurality of apertures into which the plurality of pins are received. Engagement between the plurality of pins and the supporting structure limits insertion of the plurality of pins into the apertures and thereby supports the footrest plate in an elevated position relative to the supporting structure until a predetermined force is applied to the footrest plate causing the plurality of pins to further insert into the plurality of apertures and the footrest plate to move toward the supporting structure.

Abstract: The invention relates to an instrument panel crossmember for vehicles that have different configurations, said crossmember (4) being intended to extend between two front pillars (28, 30) of a vehicle. According to the invention, the crossmember (4) comprises a first portion (22) extending opposite the vehicle driving seat, one end of said first portion (22) being intended to connect to a front pillar (28) of the vehicle, the other end being connected to a fixing device (26), said fixing device (26) being designed selectively to support one end of a second portion (24) extending facing the vehicle passenger seat and/or a strut (20) designed to connect said crossmember (4) to the floor (16) of the vehicle, depending on the configuration of the vehicle.

Abstract: In a method for the production of a dashboard support for a motor vehicle, a blank is cut from an extruded profile part. The blank is then trimmed and shaped to form a mount which is connected to an end of a crossbeam for allowing subsequent coupling of the crossbeam via the mount to an A-pillar of the motor vehicle.

Abstract: In a cab for construction machine, a support structure for a front console is provided with a first fixed member supporting a cover member and a second fixed member supporting the first fixed member from below the first fixed member. The first fixed member is fixed to a front plate at two locations directly below both ends of a front window. The second fixed member is fixed to a floor plate.

Abstract: A vehicle interior assembly includes a vehicle interior part and a trim panel. The vehicle interior part includes at least two mounting sections defining at least two mounting openings extending therethrough. The trim panel includes at least two projections extending through the at least two mounting openings of the vehicle interior part from a backside surface of the trim panel, respectively, one of the projections having an attachment portion that retains the trim panel on the vehicle interior part in an installed position. One of the projections includes a restricting portion spaced from the mounting section of the vehicle interior part by a first prescribed deployment distance with the trim panel in the installed position. The restricting portion is configured to contact a corresponding one of the mounting sections of the vehicle interior part and retain the trim panel from being completely detached from the vehicle interior part.

Abstract: A structure of a steering support member, which enables the reduction of vehicle interior noise and steering vibration by suppressing the fore-and-aft vibration of the steering support member by means of a C-shaped or U-shaped brace and by increasing the rigidity of the steering support member in the front of the driver seat side, and enables the setting of a vibration mode in accordance with vehicle types by fine adjusting the positions of the brace and a steering bracket and by selecting the rigidity of the brace.

Abstract: A cluster panel assembly comprising a bridge bezel operably and releasably coupled to a surround bezel is disclosed, wherein the bridge bezel is disposed adjacent a steering column and further comprises a plurality of attachment locations for coupling the bridge bezel to the surround bezel, wherein the attachment locations comprise a set of fasteners adapted to be released in a car-forward sequence as an impact load is imparted on the bridge bezel from the steering column during a collision event.

Abstract: An instrument panel which is supported at a cowl panel at a front-side portion thereof is provided. The cowl panel includes an upper face wall which faces to a windshield from below, a bending portion which is formed at a rear end of the upper face wall and bendable in a vehicle collision, and a rear face wall which extends downward from the bending portion and has a lower portion connecting to a dash panel. The instrument panel includes a first restriction portion to restrict a downward move of the instrument panel by contacting the upper face wall of the cowl member, and a second restriction portion to restrict an upward move of the instrument panel by said rear face wall of the cowl member at a lower portion of the front-side portion thereof.

Abstract: An integrated structural system for a vehicle, the system having: a structural member; a means for securing a first beam component to the structural member, the first beam component being molded from a first amount of thermoplastic material; and a means for securing a second beam component to the first beam component, the second beam component being separately molded from a second amount of thermoplastic material, the second beam component having a configuration different from the first beam component.

Abstract: Disclosed herein are embodiments of a steering column cover skirt attachment bracket and steering column assemblies for a vehicle. One embodiment of a steering column assembly comprises a steering column having a steering column cover, an instrument panel and a lower driver panel forming a recess for receiving the steering column and steering column cover and having an interior surface and an attachment tower extending from the interior surface. The attachment tower is configured to couple the lower driver panel to the instrument panel. A steering column cover skirt extends between the steering column cover and the lower driver panel and has a first end attached to the steering column cover and a second end attached to the lower driver panel.

Abstract: A two-member assembling structure in which a clip mounted to a pedestal of an attachment member is inserted into a clip hole of a mating member, the clip includes a pedestal coupling portion coupled to a rib of the pedestal, an engaging arm adapted to pass through the clip hole while undergoing elastic deformation when the clip is inserted into or removed of the clip hole, an engaging surface formed on an outer side surface of the engaging arm and capable of engaging with a hole edge of the clip hole, a stable portion extending from the engaging surface and opposed to the rib of the pedestal so as to be capable of contacting therewith, and a regulating portion protruding toward the rib of the pedestal from a position in the vicinity of the stable portion. As the pedestal of the attachment member, there are prepared at least three kinds of pedestals for low retention, medium retention, and high retention.

Abstract: A cross car beam for a vehicle having a molded base, a molded steering column structure attached to the forward side of the driver's side of the molded base, and a molded driver side structure attached to the rearward side of the driver's side of the molded base. One of the molded base, the molded steering column structure, and the molded driver side structure is composed of a polymer or a blend of polymers reinforced with fibers to provide strength. An optional tensile member such as a steel tube is attached to the molded base. The tensile member is composed of a metal or a reinforced polymerized material. One of the molded base, the molded steering column structure, and the molded driver side structure may include a class A surface. Alternatively or in addition a class A part may be attached to one of these structures.

Abstract: A sill cover includes an elongated sill cover main body, a plurality of hinges, a plurality of attachments and a linking portion. The plurality of hinges is foldably provided along a longitudinal direction of the sill cover main body. The plurality of attachments is connected to the plurality of hinges and shifts to a vehicle mounting position according to folding of the plurality of hinges. The linking portion links three attachments among the plurality of attachments to one another.

Abstract: A cockpit support structure of a motor vehicle has a cross member (11) with brackets (13, 14, 15, 16, 17) for connecting the cross member (11) to a body structure of the motor vehicle, and having brackets (18, 19, 20) for connecting functional components to the cross member (11). The cross member (11) and the brackets (13, 14, 15, 16, 17, 18, 19, 20) all are produced from a magnesium alloy material.

Abstract: The present invention relates to a transverse-member motor-vehicle module for receiving the instrument panel and reinforcing the bodywork for the direct connection of the two A-pillars of a motor vehicle, composed of a transverse member with a steering-column retainer, where the transverse-member module, i.e. not only the transverse member but also the steering-column retainer, are manufactured using a metal-plastic-composite design (hybrid technology), and these are composed of at least one main body and of at least one first thermoplastic part and one second thermoplastic part, where these have been securely bonded via injection molding firstly to the main body and simultaneously the various plastics parts have been bonded to one another, where the two plastics parts are composed of different plastics materials and these are injected in the bi-injection molding process, where they fuse with one another when they encounter one another.

Abstract: In a method for the production of a dashboard support for a motor vehicle, a blank is cut from an extruded profile part. The blank is then trimmed and shaped to form a mount which is connected to an end of a crossbeam for allowing subsequent coupling of the crossbeam via the mount to an A-pillar of the motor vehicle.

Abstract: An instrument panel which is supported at a cowl panel at a front-side portion thereof is provided. The cowl panel includes an upper face wall which faces to a windshield from below, a bending portion which is formed at a rear end of the upper face wall and bendable in a vehicle collision, and a rear face wall which extends downward from the bending portion and has a lower portion connecting to a dash panel. The instrument panel includes a first restriction portion to restrict a downward move of the instrument panel by contacting the upper face wall of the cowl member, and a second restriction portion to restrict an upward move of the instrument panel by said rear face wall of the cowl member at a lower portion of the front-side portion thereof.

Abstract: An automotive vehicle including a passenger compartment and an instrument panel is provided. The instrument panel includes a beam disposed at a forward end of the compartment and extending across the width of the compartment. A driver's side instrument panel module is secured to the beam. A passenger's side instrument panel module is also secured to the beam. A defrost module is located adjacent at least one of the driver's side module and said passenger side module and positioned to provide forced air flow over the windshield of the vehicle. A driver's side vent module is disposed between the driver's side module and the sidewall of the compartment. In addition, a passenger side vent module is disposed between the passenger side module and the opposed compartment sidewall.

Abstract: This disclosure relates to a display surround for protecting a display area and, in particular, to trim elements for surrounds located around dials in automotive instrument panels. A display surround for protecting a display area comprises a perimeter wall for surrounding the display area and a wall capping piece. The wall extends from a base portion of the wall proximate the display area towards an end portion of the wall away from the display area. The end portion includes a top face, and the top face includes a groove. The capping piece has a tongue. The tongue includes a protuberance on opposite sides and the groove includes a recess on opposite sides. The capping piece is secured in place to cap the wall by seating the tongue within the groove and by engaging each protuberance with a corresponding recess.

Abstract: A surrounding structure of a recessed storage compartment of an instrument panel, including the compartment formed in the instrument panel, includes a steering support member extending in a vehicle width direction on a forward position of a front wall of the compartment, and an attachment piece protruding frontward from the front wall. The attachment piece has an attachment portion abutting the support member. A U-shaped cutout is formed in the attachment portion to be opened on a front edge of the attachment portion or on a rear edge of the attachment portion. The attachment piece is fastened to the support member by a fastening member inserted into the cutout. A cross-sectional center of the support member is arranged above a top edge or below a bottom edge of the front wall.