CN208505598U - A kind of automatic detector of child safety seat connector - Google Patents

Abstract

The utility model discloses a kind of automatic detector of child safety seat connector, the child safety seat connector includes cross bar and curb girder, is equipped with self-locking lock bolt and unhook button in curb girder；It is characterised in that it includes rack, rack is equipped with detection platform, and detection platform is equipped with detection components, and detection components include fixed bracket, the coupling mechanism force mechanism for testing and release force mechanism for testing fixed by bracket is arranged in；Fixed branch is provided with two for fixing the fixing groove of curb girder；Two coupling mechanism force mechanism for testing faces, two fixing grooves, coupling mechanism force mechanism for testing include first pressure sensor and first mechanical arm, and first mechanical arm end is equipped with the pull rod being through in card slot being used for；Two release force mechanism for testing are located on the outside of fixing groove, and release force mechanism for testing includes second pressure sensor and second mechanical arm, and second mechanical arm end is protruding with briquetting.Automatic detector detects child safety seat connector automatically, and high-efficient, test result is reliable and stable.

Description

A kind of automatic detector of child safety seat connector

Technical field

The utility model relates to a kind of automatic detectors of child safety seat connector.

Background technique

In today that family car is popularized, child safety seat is increasingly liked by everybody, existing children's safety In seat, connector is the important spare part of child safety seat.Child safety seat connector is located at child safety seat bottom Portion, as shown in Figure 1 and Figure 2, child safety seat connector 9 include cross bar 91 and the curb girder 92 that 91 both ends of cross bar are arranged in, side 92 end of beam is equipped with bit-avoiding slot 921, is equipped with self-locking lock bolt 93, clamping block 94, torsional spring 95 and spring 96, self-locking lock in curb girder 92 Door bolt 93 is arranged in third bit-avoiding slot 921, and self-locking 93 front end of lock bolt is equipped with block 931 and latch hook 932, block 931 and latch hook 932 Between form card slot 934, self-locking 93 tail end of lock bolt is equipped with locating slot 933, and self-locking lock bolt 93 and curb girder 92 is arranged in torsional spring 95 Between inner wall 922；Clamping block 94 is located at self-locking 93 rear of lock bolt, and 96 one end of spring is connect with clamping block 94,96 other end of spring It is fixed on the inner wall 922 of curb girder 92, the front end of clamping block 94 is protruding with fixture block 941, and the tail portion of clamping block 94 is equipped with to break off relations and press Button 942, unhook button 942 protrude from 92 outside of curb girder.When self-locking lock bolt 93 is unlocked, the block 931 of self-locking lock bolt 93 is located at In third bit-avoiding slot 921, torsional spring 95 and spring 96 are in free state；Metal bar enters self-locking lock in third bit-avoiding slot 921 The block 931 of door bolt 93 is pushed into curb girder 92, and latch hook 932 is gone in third bit-avoiding slot 921, and metal bar is stuck in card slot 934 solid It is fixed；After self-locking lock bolt 93 locks, the fixture block 941 of clamping block 94 is stuck in the locating slot 933 of self-locking lock bolt 93, torsional spring 95 and spring 96 are in compressive state；When self-locking lock bolt 93 unlocks, clamping block 94 is pulled back again after unhook button 942 need to be pressed, makes fixture block 941 leave locating slot 933, and torsional spring 95 rotates self-locking lock bolt 93 at this time, and metal bar is released bit-avoiding slot 921 by block 931.

Child safety seat is in use, self-locking lock bolt 93 is held on the interconnecting piece of automotive seat, when preventing braking automobile Child safety seat moves forward disengaging automotive seat, therefore the quality of child safety seat connector directly influences entire children The security performance of safety seat to the riveting intensity of child safety seat connector, the coupling mechanism force of latch hook and tripping pulling force, breaks off relations The release force etc. of button has strict requirements.After existing child safety seat connector is completed, several need to manually it take With equipment such as crowbar, tensiometer, pressure gauges, manual testing is carried out step by step by hand.This manual operation production efficiency is low, weight Renaturation manipulation fatiguability is easy to happen crowbar and stabs the industrial accidents such as hand.It is artificial to determine youngster according to feel, sound, component locations Virgin safety seat connector quality, the operating time is long, and test accuracy varies with each individual, and testing efficiency is low.

Utility model content

The utility model provides a kind of automatic detector of child safety seat connector, to solve in the prior art The problem of virgin safety seat connector manual detection efficiency is low, accuracy rate is low, high labor cost.

The technical solution of the utility model is achieved in that

A kind of automatic detector of child safety seat connector provided by the utility model, the child safety seat connect Connecing device includes cross bar and the curb girder that cross bar both ends are arranged in, and curb girder end is equipped with third bit-avoiding slot, is equipped with self-locking lock bolt in curb girder And clamping block, self-locking lock bolt front end are equipped with block and latch hook, form card slot between block and latch hook, clamping block is located at self-locking lock bolt The tail portion at rear, clamping block is equipped with unhook button, and unhook button protrudes from side rail outer；It is characterised by comprising:

Rack, rack are equipped with detection platform, and detection platform is equipped with detection components, detection components include fixed bracket, Coupling mechanism force mechanism for testing and release force mechanism for testing by fixed bracket are set；

Fixed branch is provided with two for fixing the fixing grooves of curb girder, and fixing groove two sides are respectively equipped with the first bit-avoiding slot and the Two bit-avoiding slots, two the first bit-avoiding slots are oppositely arranged, and cross bar passes through the first bit-avoiding slot, and two the second bit-avoiding slots are located at fixed bracket It outside and is correspondingly arranged with unhook button；

The quantity of coupling mechanism force mechanism for testing is two, the end of two coupling mechanism force mechanism for testing difference two fixing grooves of face Portion, coupling mechanism force mechanism for testing include first pressure sensor and make the first mechanical arm moved back and forth along fixing groove direction, the One mechanical arm end is equipped with the pull rod being through in card slot being used for；

The quantity of release force mechanism for testing is two, and two release force mechanism for testing are located on the outside of the second bit-avoiding slot, Release force mechanism for testing includes the second mechanical arm that second pressure sensor and work move back and forth, the movement of second mechanical arm Direction is protruding with the briquetting for pressing unhook button perpendicular to unhook button, second mechanical arm end.

Release force mechanism for testing described above is additionally provided with the third mechanical arm of work level round-trip, the fortune of third mechanical arm Dynamic direction is parallel with fixing groove direction, and the second mechanical arm is arranged in third mechanical arm end, the second pressure sensor It is arranged on third mechanical arm.

Third mechanical arm described above includes second base, and second base is equipped at least one third sliding rail, and third is sliding Rail is parallel with the fixing groove, and third sliding rail is equipped with third sliding block, and third sliding block is moved along third sliding rail, and described second is mechanical Arm is arranged on third sliding block.

Second mechanical arm described above includes the second sliding block and the second sliding rail for being arranged on third sliding block, the second sliding rail with The third sliding rail is vertically arranged, and the second sliding block is arranged on the second sliding rail and moves along the second sliding rail, the briquetting setting In the second slider end.

First mechanical arm described above includes first base, and first base is equipped at least one the first sliding rails, and first is sliding Rail is parallel with the fixing groove, and the first sliding rail is equipped with the first sliding block, and the first sliding block is moved horizontally along the first sliding rail, and described first Pressure sensor is arranged on the first sliding block, and the first slider end is protruding with U-shaped convex block, and the both ends of the pull rod are fixed on U-shaped In convex block.

Travel switch is equipped on first mechanical arm and third mechanical arm described above, travel switch is arranged in the first sliding block By third sliding block.

Rack described above above detection platform be equipped with left protective fence, rear protective guard and right protective fence, left protective fence and Feed inlet is formed between right protective fence, and safe grating, two safe grating difference are respectively equipped on left protective fence and right protective fence Positioned at feed inlet two sides.

Rack described above is convexly equipped with operating platform below feed inlet, and operating platform is equipped with start button and stopping is pressed Button.

Be additionally provided with display/panel bracket above rear protective guard described above, the left and right ends of display/panel bracket by left protective fence and Right protective fence support, display/panel bracket are equipped with touch screen and several indicator lights, are additionally provided with warning lamp at the top of display/panel bracket.

Fixed bracket described above includes bottom plate and base plate, and bottom plate two sides are equipped with groove, and the pedestal is mounted in groove, Pedestal two sides are respectively equipped with the first sidebar and the second sidebar, and pedestal, the first sidebar and the second sidebar surround the fixing groove, and first Sidebar is against side rail inner, and the second sidebar is against side rail outer, and the first bit-avoiding slot is located in the first sidebar, and the second bit-avoiding slot is located at In second sidebar.

The utility model compared with prior art, has the advantage that

1, the operations of automatic detector simulation artificial detection child safety seat connector, detect children's safety automatically Seat connector, detection efficiency is high, low to the technical ability of testing staff, environmental requirement, and test result is stable, reliable, it can be achieved that one People looks after more machines, is easily accomplished each performance test of child safety seat connector, reduces artificial, auxiliary testing tool Investment, management cost and industrial accident incidence；

2, entire automatic detector structure is simple, space takes up little area, easy to operate, particularly suitable for flow production line On；

3, two coupling mechanism force mechanism for testing are detected simultaneously, two release force mechanism for testing while being detected, into one Step accelerates detection efficiency；

4, frame top is equipped with display screen and warning lamp, and operator is facilitated to understand detecting state.

Detailed description of the invention

Fig. 1 is the structural schematic diagram of child safety seat connector；

Fig. 2 is the variation schematic diagram of state and state after locking before child safety seat connector locks；

Fig. 3 is the structural representation of the automatic detector of child safety seat connector provided by the embodiment of the utility model Figure；

Fig. 4 is the structural schematic diagram of the detection components in child safety seat connector automatic detector；

Fig. 5 is the explosive view of detection components；

Fig. 6 is the top view of detection components when child safety seat connector is put into fixed bracket；

Fig. 7 is the perspective view of detection components when child safety seat connector is put into fixed bracket；

Fig. 8 is the top view of detection components when detecting the coupling mechanism force of child safety seat connector；

Fig. 9 is the perspective view of detection components when detecting the coupling mechanism force of child safety seat connector；

Figure 10 is the top view of detection components when detecting the release force of child safety seat connector；

Figure 11 is the perspective view of detection components when detecting the release force of child safety seat connector.

Specific embodiment

It is practical new below in conjunction with this to keep the objectives, technical solutions, and advantages of the embodiments of the present invention clearer Attached drawing in type embodiment, the technical scheme in the utility model embodiment is clearly and completely described, it is clear that is retouched The embodiment stated is the utility model a part of the embodiment, instead of all the embodiments.Based on the implementation in the utility model Example, every other embodiment obtained by those of ordinary skill in the art without making creative efforts belong to The range of the utility model protection.

As shown in Figures 3 to 5, the automatic detector of a kind of child safety seat connector provided in this embodiment, it is described Child safety seat connector 9 includes cross bar 91 and the curb girder 92 that 91 both ends of cross bar are arranged in, and 92 end of curb girder is kept away equipped with third Position slot 921, curb girder 92 is interior to be equipped with self-locking lock bolt 93 and clamping block 94, and self-locking 93 front end of lock bolt is equipped with block 931 and latch hook 932, Card slot 934 is formed between block 931 and latch hook 932, clamping block 94 is located at self-locking 93 rear of lock bolt, and the tail portion of clamping block 94 is set There is unhook button 942, unhook button 942 protrudes from 92 outside of curb girder；It is characterised by comprising:

Rack 10, rack 10 are equipped with detection platform 11, and detection platform 11 is equipped with detection components 5, and detection components include Fixed bracket 4, the coupling mechanism force mechanism for testing 2 and release force mechanism for testing 3 that fixed 4 side of bracket is set；

Fixed bracket 4 is set there are two the fixing groove 44 for fixing curb girder 92, and 44 two sides of fixing groove are respectively equipped with first and keep away Position slot 421 and the second bit-avoiding slot 431, two the first bit-avoiding slots 421 be oppositely arranged, cross bar 91 pass through the first bit-avoiding slot 421, two Second bit-avoiding slot 431 is located at fixed 4 outside of bracket, and two the second bit-avoiding slots 431 are correspondingly arranged with unhook button 942；

The quantity of coupling mechanism force mechanism for testing 2 is two, and two coupling mechanism force mechanism for testing 2 distinguish two fixing grooves 44 of face End, coupling mechanism force mechanism for testing 2 include first pressure sensor 21 and make the first machine moved back and forth along 44 direction of fixing groove Tool arm 22,22 end of first mechanical arm are equipped with the pull rod 23 being through in card slot 934 being used for；

The quantity of release force mechanism for testing 3 is two, and two release force mechanism for testing 3 are located at the second bit-avoiding slot 431 Outside, release force mechanism for testing 3 include the second mechanical arm 32 that second pressure sensor 31 and work move back and forth, the second machine The direction of motion of tool arm 32 is protruding with perpendicular to unhook button 942,32 end of second mechanical arm for pressing unhook button 942 Briquetting 321.

The automatic detector of child safety seat connector described in the present embodiment, it is automatic to detect child safety seat connection Device, detection efficiency are high, low to the technical ability of testing staff, environmental requirement, test result is stable, it is reliable, it can be achieved that a people look after it is more Platform machine is easily accomplished each performance test of child safety seat connector, reduces artificial, auxiliary testing tool investment, pipe Manage cost and industrial accident incidence.

Two coupling mechanism force mechanism for testing 2 are detected simultaneously, two release force mechanism for testing 3 while being detected, into one Step accelerates detection efficiency；First pressure sensor 21 and second pressure sensor 31 detect pulling force and pressure data automatically, then unite In one feedback to the center processor of automatic detector, detection data is accurately clear.

Release force mechanism for testing 3 described above is additionally provided with the third mechanical arm 33 of work level round-trip, third mechanical arm 33 direction of motion is parallel with 44 direction of fixing groove, and the second mechanical arm 32 setting is in 33 end of third mechanical arm, and described the Two pressure sensors 31 are arranged on third mechanical arm 33.

Third mechanical arm 33 described above includes second base 331, and second base 331 is equipped at least one third sliding rail 332, third sliding rail 332 is parallel with the fixing groove 44, and third sliding rail 332 is equipped with third sliding block 333,333 edge of third sliding block Third sliding rail 332 is mobile, and the second mechanical arm 32 is arranged on third sliding block 333.

The second sliding rail that second mechanical arm 32 described above sliding block 323 and be arranged on third sliding block 333 including second 322, the second sliding rail 322 is vertically arranged with the third sliding rail 332, and the second sliding block 323 is arranged on the second sliding rail 322 and edge Second sliding rail 322 is mobile, and the briquetting 321 is arranged in 323 end of the second sliding block.

First mechanical arm 22 described above includes first base 221, and first base 221 is equipped at least one the first sliding rails 222, the first sliding rail 222 is parallel with the fixing groove 44, and the first sliding rail 222 is equipped with the first sliding block 223,223 edge of the first sliding block First sliding rail 222 moves horizontally, and the first pressure sensor 21 is arranged on the first sliding block 223, and 223 end of the first sliding block is convex There is U-shaped convex block 224 out, the both ends of the pull rod 23 are fixed in U-shaped convex block 224.

It is equipped with travel switch 6 in first mechanical arm 22 described above and third mechanical arm 33, the setting of travel switch 6 is the By one sliding block 223 and third sliding block 333.

Rack 10 described above is equipped with left protective fence 12, rear protective guard 13 and right protective fence 14 above detection platform 11, Feed inlet 15 is formed between left protective fence 12 and right protective fence 14, is respectively equipped with safety light on left protective fence 12 and right protective fence 14 Grid 16, two safe gratings 16 are located at 15 two sides of feed inlet.

Rack 10 described above is convexly equipped with operating platform 17 below feed inlet 15, and operating platform 17 is equipped with starting and presses Button 171 and stop button 172.

Display/panel bracket 18 is additionally provided with above rear protective guard 13 described above, the left and right ends of display/panel bracket 18 are anti-by a left side Guardrail 12 and right protective fence 14 support, and display/panel bracket 18 is equipped with touch screen 181 and several indicator lights 182, display/panel bracket 18 tops are additionally provided with warning lamp 183.

Fixed bracket 4 described above includes bottom plate 41 and pedestal 45, and 41 two sides of bottom plate are equipped with groove 411, the pedestal 45 It is mounted in groove 411,45 two sides of pedestal are respectively equipped with the first sidebar 42 and the second sidebar 43, pedestal 45,42 and of the first sidebar Second sidebar 43 surrounds the fixing groove 44, and the first sidebar 42 is against 92 inside of curb girder, and the second sidebar 43 is against 92 outside of curb girder, First bit-avoiding slot 421 is located in the first sidebar 42, and the second bit-avoiding slot 431 is located in the second sidebar 43.The pedestal 45 is elasticity Material is made, and the first sidebar 42 and the second sidebar 43 clamp curb girder 92, the child safety seat connector 9 during being convenient for measuring Positioning.

The test process of the automatic detector of child safety seat connector described in the present embodiment is as follows:

1, child safety seat connector 9 is put into fixed bracket 4 by operator, at this time as shown in Figure 6, Figure 7, children In safety seat connector 9, block 931 is located in the bit-avoiding slot 921 of curb girder 92, and it is automatic that operator presses start button 171 Into detection；

2, coupling mechanism force is tested: the first sliding block 223 of coupling mechanism force mechanism for testing 2 is moved forward along the first sliding rail 222, pull rod 23 promotion blocks 931 rotate self-locking lock bolt 93 and lock self-locking lock bolt 93, and as shown in Figure 8, Figure 9, pull rod 23 enters card slot 934 Interior, latch hook 932 is ploughed under in bit-avoiding slot 921 and is kept off after pull rod 23；

3, locking pressure suffered by pull rod 23 during 21 detecting step 2 of first pressure sensor, records and will lock Pressure show whether the coupling mechanism force of child safety seat connector 9 is qualified compared with locking preset value；

4, tripping force is tested: the first sliding block 223 of coupling mechanism force mechanism for testing 2 is moved backward along the first sliding rail 222, pull rod 23 squeeze latch hook 932, and first pressure sensor 21 detects the tripping pressure that pull rod 23 is subject to, if tripping pressure reaches default tripping For self-locking lock catch 93 still in lock state, then the tripping force for obtaining child safety seat connector 9 is qualified when power；

5, release force is tested: as shown in Figure 10, Figure 11, the second sliding block 323 of release force mechanism for testing 3 is along the second sliding rail 322 is mobile, and briquetting 321 passes through the second bit-avoiding slot 431 and presses unhook button 942, after briquetting 321 moves a certain distance, the Three sliding blocks 333 are moved along third sliding rail 332, and second mechanical arm 32 moves forward, and unhook button 942 is pulled to move forward, and second Pressure sensor 31 detects the unlocking resistance that briquetting 321 is subject to, if self-locking lock catch 93 when unlocking resistance reaches default release force It could not still unlock, then the release force for obtaining child safety seat connector 9 is qualified；

6, all detections are completed, and touch screen 181 shows testing result, if there is underproof detection project, warning lamp 183 is sent out It warns out.

Finally, it should be noted that above embodiments are only to illustrate the technical solution of the utility model, rather than its limitations； Although the utility model is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: It is still possible to modify the technical solutions described in the foregoing embodiments, or part of technical characteristic is carried out etc. With replacement；And these are modified or replaceed, various embodiments of the utility model technology that it does not separate the essence of the corresponding technical solution The spirit and scope of scheme.

Claims (10)

1. a kind of automatic detector of child safety seat connector, the child safety seat connector (9) includes cross bar (91) and setting is in the curb girder (92) at cross bar (91) both ends, and curb girder (92) end is equipped with third bit-avoiding slot (921), in curb girder (92) Equipped with self-locking lock bolt (93) and clamping block (94), self-locking lock bolt (93) front end is equipped with block (931) and latch hook (932), block (931) card slot (934) are formed between latch hook (932), clamping block (94) is located at self-locking lock bolt (93) rear, clamping block (94) Tail portion is equipped with unhook button (942), and unhook button (942) protrudes from the outside of curb girder (92)；It is characterised by comprising:

Rack (10), rack (10) are equipped with detection platform (11), and detection platform (11) is equipped with detection components (5), detection group Part includes fixed bracket (4), setting in the coupling mechanism force mechanism for testing (2) and release force mechanism for testing (3) for fixing bracket (4) side；

Fixed bracket (4) are set there are two the fixing groove (44) for fixing curb girder (92), and fixing groove (44) two sides are respectively equipped with the One bit-avoiding slot (421) and the second bit-avoiding slot (431), two the first bit-avoiding slots (421) are oppositely arranged, and cross bar (91) passes through first and keeps away Position slot (421), two the second bit-avoiding slots (431) are located on the outside of fixed bracket (4) and are correspondingly arranged with unhook button (942)；

The quantity of coupling mechanism force mechanism for testing (2) is two, two coupling mechanism force mechanism for testing (2) difference two fixing grooves (44) of face End, coupling mechanism force mechanism for testing (2) includes first pressure sensor (21) and moves back and forth along fixing groove (44) direction First mechanical arm (22), first mechanical arm (22) end is equipped with pull rod (23) for being stuck in card slot (934)；

The quantity of release force mechanism for testing (3) is two, and two release force mechanism for testing (3) are located at the second bit-avoiding slot (431) outside, release force mechanism for testing (3) include the second mechanical arm that second pressure sensor (31) and work move back and forth (32), perpendicular to unhook button (942), second mechanical arm (32) end is protruding with to be used for the direction of motion of second mechanical arm (32) Press the briquetting (321) of unhook button (942).

2. a kind of automatic detector of child safety seat connector according to claim 1, it is characterised in that: described to release Put the third mechanical arm (33) that power mechanism for testing (3) is additionally provided with the round-trip of work level, the direction of motion of third mechanical arm (33) Parallel with fixing groove (44) direction, the second mechanical arm (32) is arranged in third mechanical arm (33) end, the second pressure Sensor (31) is arranged on third mechanical arm (33).

3. a kind of automatic detector of child safety seat connector according to claim 2, it is characterised in that: described Three-mechanical arm (33) includes second base (331), and second base (331) is equipped at least one third sliding rail (332), and third is sliding Rail (332) is parallel with the fixing groove (44), and third sliding rail (332) is equipped with third sliding block (333), third sliding block (333) edge Third sliding rail (332) is mobile, and the second mechanical arm (32) is arranged on third sliding block (333).

4. a kind of automatic detector of child safety seat connector according to claim 3, it is characterised in that: described Two mechanical arms (32) include the second sliding rail (322) of the second sliding block (323) and setting on third sliding block (333), the second sliding rail (322) it is vertically arranged with the third sliding rail (332), the second sliding block (323) is arranged on the second sliding rail (322) and slides along second Rail (322) is mobile, and the briquetting (321) is arranged in the second sliding block (323) end.

5. a kind of automatic detector of child safety seat connector according to claim 4, it is characterised in that: described One mechanical arm (22) includes first base (221), and first base (221) is equipped at least one the first sliding rails (222), and first is sliding Rail (222) is parallel with the fixing groove (44), and the first sliding rail (222) is equipped with the first sliding block (223), the first sliding block (223) edge First sliding rail (222) moves horizontally, and the first pressure sensor (21) is arranged on the first sliding block (223), the first sliding block (223) end is protruding with U-shaped convex block (224), and the both ends of the pull rod (23) are fixed in U-shaped convex block (224).

6. a kind of automatic detector of child safety seat connector according to claim 5, it is characterised in that: described It is equipped with travel switch (6) on one mechanical arm (22) and third mechanical arm (33), travel switch (6) is arranged in the first sliding block (223) and third sliding block (333) is other.

7. a kind of automatic detector of child safety seat connector as claimed in any of claims 1 to 6, special Sign is: the rack (10) is equipped with left protective fence (12), rear protective guard (13) and right protective fence above detection platform (11) (14), feed inlet (15) are formed between left protective fence (12) and right protective fence (14), left protective fence (12) and right protective fence (14) On be respectively equipped with safe grating (16), two safe gratings (16) are located at feed inlet (15) two sides.

8. a kind of automatic detector of child safety seat connector according to claim 7, it is characterised in that: the machine Frame (10) is convexly equipped with operating platform (17) below feed inlet (15), and operating platform (17) is equipped with start button (171) and stops Only button (172).

9. a kind of automatic detector of child safety seat connector according to claim 8, it is characterised in that: after described It is additionally provided with display/panel bracket (18) above protective fence (13), the left and right ends of display/panel bracket (18) are by left protective fence (12) and the right side Protective fence (14) support, display/panel bracket (18) are equipped with touch screen (181) and several indicator lights (182), display/panel bracket (18) top is additionally provided with warning lamp (183).

10. a kind of automatic detector of child safety seat connector as claimed in any of claims 1 to 6, Be characterized in that: the fixed bracket (4) includes bottom plate (41) and pedestal (45), and bottom plate (41) two sides are equipped with groove (411), described Pedestal (45) is mounted in groove (411), and pedestal (45) two sides are respectively equipped with the first sidebar (42) and the second sidebar (43), pedestal (45), the first sidebar (42) and the second sidebar (43) surround the fixing groove (44), and the first sidebar (42) is against in curb girder (92) Side, the second sidebar (43) are against on the outside of curb girder (92), and the first bit-avoiding slot (421) is located on the first sidebar (42), the second bit-avoiding slot (431) it is located on the second sidebar (43).