An automatic hole positioning and assembling jig for the U-rib of the steel girder bridge deck roof

Abstract

The present invention relates to an automatic hole positioning and assembling jig for the U-rib of the steel girder bridge deck roof plate, comprising: a pair of guide rails; a sliding beam slidably arranged on the pair of guide rails; a plurality of positioning seats which are installed on the sliding beam in a position-adjustable manner and are used for positioning the U-rib; and a platform plate arranged at one end of the pair of guide rails far away from the sliding beam and used for placing the roof plate. The present invention positions the U-rib through the arranged positioning seats. During use, the U-rib can be hoisted onto the positioning seats, the end of the U-rib is positioned and connected with the positioning seats, and the other end of the U-rib is placed on the platform plate, realizing the rapid positioning of the U-rib, eliminating the operation step of scribing on the roof plate, and also eliminating the need for manual position adjustment of the U-rib with a hammer, improving the operation efficiency and saving the operation cost. After the U-rib is positioned and connected, the U-rib can be accurately pushed onto the roof plate by moving the sliding beam along the guide rails, and then the welding and fixing of the roof plate and the U-rib can be directly completed, with high production efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of bridge construction, and particularly refers to an automatic hole positioning and assembling jig for the U-rib of the steel girder bridge deck roof Background Art

[0002] In a bridge structure, the bridge deck is generally composed of a roof and U-ribs. In the prior art, when welding the roof and U-ribs, first, lines are drawn on the roof corresponding to the positions where the U-ribs are to be placed, and then the U-ribs are lifted by a crane and placed at the marked positions on the roof. When there is a misalignment, manual adjustment with a hammer is required. After the alignment is correct, welding and fixing are carried out. This method has problems such as long operation time, high labor cost, and low production efficiency. Summary of the Invention

[0003] The purpose of the present invention is to overcome the defects of the prior art and provide an automatic hole positioning and assembling jig for the U-rib of the steel girder bridge deck roof, so as to solve the problems of long operation time, high labor cost, and low production efficiency existing in the existing connection method of the roof and U-ribs.

[0004] The technical solution for achieving the above purpose is as follows:

[0005] The present invention provides an automatic hole positioning and assembling jig for the U-rib of the steel girder bridge deck roof, including:

[0006] A pair of guide rails;

[0007] A sliding beam slidably arranged on the pair of guide rails;

[0008] A plurality of positioning seats installed on the sliding beam in a position-adjustable manner and for positioning the U-rib; and

[0009] A platform plate arranged at one end of the pair of guide rails away from the sliding beam and for placing the roof.

[0010] The positioning and assembling jig of the present invention positions the U-rib through the provided positioning seats. During use, the U-rib can be lifted and placed on the positioning seats. The end of the U-rib is positioned and connected to the positioning seats, and the other end of the U-rib is placed on the platform plate, realizing the rapid positioning of the U-rib, eliminating the operation step of drawing lines on the roof, and also eliminating the need for manual adjustment of the position of the U-rib with a hammer, improving the operation efficiency and saving the operation cost. After the U-rib is positioned and connected, the U-rib can be accurately pushed onto the roof by moving the sliding beam along the guide rails, and then the welding and fixing of the roof and U-rib can be directly completed, with high production efficiency.

[0011] A further improvement of the automatic hole positioning and assembling jig for the U-rib of the steel girder bridge deck roof of the present invention is that the positioning seat includes a positioning plate and a pair of positioning members installed on the positioning plate, and positioning grooves are provided on the positioning members;

[0012] A positioning hole is provided on the U-rib corresponding to the positioning groove, and the U-rib and the positioning seat are connected by a positioning pin passing through the positioning hole and the positioning groove.

[0013] A further improvement of the automatic hole positioning and assembling tire for the U-rib of the steel beam bridge deck roof of the present invention is that a sliding groove is provided on the sliding beam;

[0014] A positioning screw is connected to the positioning plate, and the head of the positioning screw slides in the sliding groove. The position of the positioning seat is adjusted by sliding the positioning screw along the sliding groove. After adjusting the position of the positioning seat, the positioning seat is fastened by a positioning nut screwed on the positioning screw to fix the position of the positioning seat.

[0015] A further improvement of the automatic hole positioning and assembling tire for the U-rib of the steel beam bridge deck roof of the present invention is that a slide rail is provided on the sliding beam, and a groove sleeved on the slide rail is provided on the positioning seat corresponding to the slide rail.

[0016] A further improvement of the automatic hole positioning and assembling tire for the U-rib of the steel beam bridge deck roof of the present invention is that a rack is provided on the guide rail;

[0017] A gear engaged with the rack is rotatably connected to the bottom of the sliding beam, and a driving member drivingly connected to the gear is provided inside the sliding beam. The driving member can drive the gear to rotate, and then make the gear move along the rack, driving the sliding beam to move along the guide rail.

[0018] A further improvement of the automatic hole positioning and assembling tire for the U-rib of the steel beam bridge deck roof of the present invention is that the driving member is a motor. The driving shaft of the motor is connected to the bottom of the sliding beam through a bearing, and a part of the driving shaft extends out of the bottom of the sliding beam and is fixedly connected to the gear.

[0019] A further improvement of the automatic hole positioning and assembling tire for the U-rib of the steel beam bridge deck roof of the present invention is that a positioning stop bar is provided on one side of the platform plate close to the sliding beam, and a limiting member is provided at the bottom of the sliding beam corresponding to the positioning stop bar. The movement of the sliding beam is limited by the limiting member abutting against the positioning stop bar.

[0020] A further improvement of the automatic hole positioning and assembling tire for the U-rib of the steel beam bridge deck roof of the present invention is that a clamping seat is provided at the bottom of the sliding beam corresponding to the guide rail, and the clamping seat is sleeved on the guide rail.

[0021] A further improvement of the automatic hole positioning and assembling tire for the U-rib of the steel beam bridge deck roof of the present invention is that the inside of the sliding beam is hollow, and a maintenance opening is provided at the top. A cover plate is detachably connected to the maintenance opening.

[0022] A further improvement of the automatic hole positioning and assembling fixture for the U-rib of the steel girder bridge deck roof of the present invention lies in that a hand hole is provided at the end of the U-rib corresponding to the positioning seat. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 FIG. is a schematic structural view of the automatic hole positioning and assembling fixture for the U-rib of the steel girder bridge deck roof of the present invention.

[0024] Figure 2 FIG. is a side view of the automatic hole positioning and assembling fixture for the U-rib of the steel girder bridge deck roof of the present invention.

[0025] Figure 3 is Figure 2 a cross-sectional view taken along A1-A1 in FIG.

[0026] Figure 4 FIG. is a side view of the sliding beam in the automatic hole positioning and assembling fixture for the U-rib of the steel girder bridge deck roof of the present invention.

[0027] Figure 5 is Figure 4 a cross-sectional view taken along A2-A2 in FIG.

[0028] Figure 6 FIG. is a schematic structural view of the positioning seat in the automatic hole positioning and assembling fixture for the U-rib of the steel girder bridge deck roof of the present invention.

[0029] Figure 7 FIG. is a side view of the positioning seat in the automatic hole positioning and assembling fixture for the U-rib of the steel girder bridge deck roof of the present invention.

[0030] Figure 8 FIG. is a schematic structural view of the guide rail and the platform plate in the automatic hole positioning and assembling fixture for the U-rib of the steel girder bridge deck roof of the present invention.

[0031] Figure 9 is Figure 8 a side view of the structure shown in FIG. DETAILED DESCRIPTION OF THE INVENTION

[0032] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0033] Referring to Figure 1 , the present invention provides an automatic hole positioning and assembling fixture for the U-rib of the steel girder bridge deck roof, which is used to position the position of the U-rib, so that the U-rib can be quickly and accurately positioned, thereby eliminating the existing process of scribing on the roof plate, saving a great deal of production costs, and ensuring and improving the quality of the connection between the roof plate and the U-rib. The positioning and assembling fixture of the present invention improves the assembly quality of the plate unit while realizing automatic synchronous walking, accurate positioning and reliable operation, and has strong versatility, which can improve the automatic manufacturing level of the plate unit. The structure of the automatic hole positioning and assembling fixture for the U-rib of the steel girder bridge deck roof of the present invention will be described below in conjunction with the accompanying drawings.

[0034] Referring toFigure 1 , showing a schematic structural view of the automatic hole positioning and assembling tire for the U-rib of the steel girder bridge deck roof of the present invention. The following will be combined with Figure 1 to describe the structure of the automatic hole positioning and assembling tire for the U-rib of the steel girder bridge deck roof of the present invention.

[0035] As Figure 1 shown, the automatic hole positioning and assembling tire for the U-rib of the steel girder bridge deck roof of the present invention includes a pair of guide rails 21, a sliding beam 22, a plurality of positioning seats 23, and a platform plate 24. The pair of guide rails 21 are arranged opposite to each other with a certain distance therebetween; the sliding beam 22 is slidably arranged on the pair of guide rails 21, and the sliding beam 22 can be moved and adjusted along the pair of guide rails 21; the plurality of positioning seats 23 are installed on the sliding beam 22 in a position-adjustable manner, and the positioning seats 23 are used for positioning the U-rib 11, Figure 1 The U-rib 11 shown in Figure 1 is a part of the U-rib. The U-rib arranged on the steel girder bridge deck roof is arranged throughout, and its length is adapted to the length of the roof.

[0036] Only a part of the roof 12 is also shown in

[0037] The platform plate 24 is arranged at one end of the pair of guide rails 21 away from the sliding beam 22, and the platform plate 24 is used for placing the roof 12.

[0038] When the positioning and assembling tire of the present invention is in use, the position of the positioning seat 23 is adjusted according to the actual required spacing of the U-ribs. After adjusting the positions of the positioning seats 23, the U-ribs are lifted and placed on the positioning seats 23, and the end of the U-rib is positioned and connected to the positioning seat 23. The other end of the U-rib is placed on the platform plate 24. After all the U-ribs are positioned and connected, the sliding beam 22 is pushed to move along the pair of guide rails 21 towards the direction of the platform plate 24, so as to drive the U-ribs to move towards the direction of the platform plate 24 until the U-ribs are completely pushed onto the roof 12 on the platform plate 24. The position of the U-ribs on the roof 12 is accurately positioned. At this time, the U-ribs can be welded and fixed, and thus the production of the roof unit is completed. Figure 4 Figure 6 Figure 7 shown, the positioning seat 23 includes a positioning plate 231 and a pair of positioning members 232 installed on the positioning plate 231, and a positioning groove 233 is provided on the positioning member 232; combined with Figure 8 Figure 9 shown, positioning holes are provided on the U-rib 11 corresponding to the positioning grooves 233, and the U-rib and the positioning seat 23 are connected by positioning pins 13 passing through the positioning holes and the positioning grooves 233.

[0039] When positioning and connecting the U-rib 11 and the positioning seat 23, the end of the U-rib 11 is sleeved on a pair of positioning members 232, and the pair of positioning members 232 are supported inside the U-rib 11. Then, the positioning pin 13 is passed through the positioning hole on the U-rib 11 and the positioning groove 233 on the positioning seat 23, realizing the positioning connection between the U-rib 11 and the positioning seat 23.

[0040] Preferably, a hand hole 111 is provided on the end of the U-rib 11 corresponding to the positioning seat 23. The setting of the hand hole 111 can facilitate the hand to reach into the U-rib 11 to complete the connection operation of the positioning pin 13.

[0041] Specifically, the positioning plate 231 is a flat plate. A U-shaped connecting plate 2311 is provided on the positioning plate 231. Installation grooves are provided on both sides of the connecting plate 2311. The positioning member 232 is attached to the installation grooves and is fixedly connected to the connecting plate 2311 by bolts. The connecting plate 2311 is fixedly connected to the positioning plate 231 by bolts.

[0042] The positioning member 232 is U-shaped, and the internal U-shaped space is the positioning groove 233. To facilitate the connection of the positioning pin, an enlarged opening is provided at the mouth of the positioning groove 233.

[0043] Preferably, the side profile after the connection between the connecting plate 2311 and the positioning member 232 is adapted to the internal profile of the U-rib 11 to realize the positioning and guiding of the U-rib. In Figure 6 the illustrated example, the side of the connecting plate 2311 is an inclined surface, and the outer side surface of the positioning member 232 is flush with the inclined surface. The inclined surface can play a guiding role for the U-rib sleeved on it, enabling the U-rib to be smoothly sleeved on the positioning seat 23.

[0044] In a specific embodiment of the present invention, as shown in Figure 4 and Figure 5 shown, a sliding groove 221 is provided on the sliding beam 22, and a positioning screw 234 is connected to the positioning plate 231. The head of the positioning screw 234 slides in the sliding groove 221. By sliding the positioning screw 234 along the sliding groove 221, the position of the positioning seat 23 is adjusted. After adjusting the position of the positioning seat 23, the positioning seat 23 is fixed by screwing a positioning nut on the positioning screw 234 to fix the position of the positioning seat 23.

[0045] Preferably, the sliding groove 221 includes a first groove and a second groove provided at the bottom of the first groove. The width of the second groove is greater than the width of the first groove. The head size of the positioning screw 234 is greater than the rod size. The head of the positioning screw 234 slides in the second groove, and the rod slides in the first groove, so that the positioning screw 234 will not come out of the first groove and the second groove. Combining Figure 6As shown, there are screw holes 2312 on the positioning plate 231. The end of the rod portion of the positioning screw 234 extends out from the screw hole 2312 and is screwed with a positioning nut. When it is necessary to adjust the position of the positioning plate, the positioning nut is loosened, and the positioning plate 231 can be moved and adjusted in the sliding groove through the positioning screw 234. After the adjustment is in place, the positioning nut is tightened again, and the positioning nut and the positioning screw cooperate to clamp and fix the positioning plate 231. Preferably, two positioning screws are connected to each positioning plate 231.

[0046] More preferably, the sliding groove 221 is provided along the entire length of the sliding beam 22, and the sliding groove 221 is provided on the side of the sliding beam 22 facing the platform plate 24.

[0047] Furthermore, as Figure 4 and Figure 5 shown, there are slide rails 222 on the sliding beam 22. Combining Figure 7 shown, there are grooves 2313 on the positioning seat 23 corresponding to the slide rails 222 and sleeved on the slide rails 222. Through the cooperation of the provided slide rails 222 and the grooves 2313, the movement of the positioning seat 23 can be positioned and guided, enabling the positioning seat 23 to stably adjust its position.

[0048] Preferably, there are two slide rails 222, which are provided along the entire length of the sliding beam 22, and the two slide rails 222 are located on both sides of the sliding groove 221.

[0049] In a specific embodiment of the present invention, as Figures 1 to 3 shown, there is a rack 211 on the guide rail 21. The bottom of the sliding beam 22 is rotatably connected with a gear 251 that meshes with the rack 211. Combining Figure 5 shown, and there is a driving member 252 inside the sliding beam 22 that is drivingly connected to the gear 251. The driving member 252 can drive the gear 251 to rotate, and then the gear 251 moves along the rack 211, driving the sliding beam 22 to move along the guide rail 21.

[0050] The movement of the sliding beam 22 on the guide rail 21 is driven by the driving member 252, the gear 251, and the rack 211. The driving member 252 can drive the gear 251 to rotate forward, so that the gear 251 meshes with the rack 211 and then moves forward along the rack 211 (moving in the direction of the platform plate 24), realizing the forward movement of the sliding beam 22. After the movement is in place, the operation of the driving member 252 can be stopped. The driving member 252 can also drive the gear 251 to rotate in reverse, so that the gear 251 meshes with the rack 211 and then moves backward along the rack 211, realizing the backward movement of the sliding beam 22 until it returns to its original position.

[0051] Preferably, the driving member 252 is a motor, preferably a double-oil motor. The driving shaft 253 of the motor is connected to the bottom of the sliding beam 22 through a bearing 254, and a part of the driving shaft 253 extends out of the bottom of the sliding beam 22 and is fixedly connected to the gear 251. The gear 251 is sleeved and fixed at the end of the driving shaft 253. The motor drives the driving shaft 253 to rotate, and then the driving shaft 253 drives the gear 251 fixed thereon to rotate.

[0052] The bearing is preferably a tapered roller bearing. An installation channel is provided on the sliding beam 22 corresponding to the bearing, and a bearing end cover 255 is provided at the bottom of the installation channel to seal the bottom of the installation channel by using the bearing end cover 255. A sealing felt 256 is provided at the connection between the bearing end cover 255 and the driving shaft 253 to achieve sealing.

[0053] In a specific embodiment of the present invention, as Figure 1 、 Figure 3 、 Figure 5 and Figure 7 shown, a positioning stop bar 241 is provided on one side of the platform plate 24 close to the sliding beam 22, and a limiting member 26 is provided at the bottom of the sliding beam 22 corresponding to the positioning stop bar 241. The movement of the sliding beam 22 is limited by the limiting member 26 abutting against the positioning stop bar 241.

[0054] Preferably, there are multiple limiting members 26, which are arranged corresponding to the positioning seat 23. The limiting members 26 are connected to the bottom of the positioning seat 23 and can be adjusted in position along with the positioning seat 23.

[0055] In a preferred embodiment, the positioning stop bar 241 is strip-shaped and extends along the side of the platform plate 24. The outer side surface of the positioning stop bar 241 is located inside the outer side surface of the platform plate 24, and the outer side surface of the positioning stop bar 241 is used to abut against the limiting member 26 to limit the displacement of the sliding beam 22. The inner side surface of the positioning stop bar 241 is used to be in contact with the side of the top plate 12 placed on the platform plate 24 to achieve the positioning of the top plate 12.

[0056] In another preferred embodiment, there are multiple positioning stop bars 241, which are arranged on the platform plate 24 at intervals.

[0057] Through the contact limit between the positioning stop bar 241 and the limiting member 26, the movement of the sliding beam 22 can be controlled to stop when it reaches the end of the platform plate 24. At this time, the U-rib 11 fixedly connected to the sliding beam 22 can be completely placed on the top plate 12, completing the positioning of the U-rib.

[0058] In a specific embodiment of the present invention, as Figure 2 、 Figure 4 、 Figure 8 and Figure 9As shown in the figure, a clamping seat 27 is provided at the bottom of the sliding beam 22 corresponding to the guide rail 21. The clamping seat 27 is sleeved on the guide rail 21. Through the setting of the clamping seat 27, the moving stability of the sliding beam 22 can be improved.

[0059] Preferably, a pair of clamping bars 212 are provided on the guide rail 21, and corresponding concave structures are provided at the bottom of the clamping seat 27 corresponding to the clamping bars 212. The clamping bars 212 are clamped in the corresponding concave structures. Thus, the cooperation of the clamping bars 212 and the concave structures can play a role in guiding and limiting the movement of the sliding beam 22, ensuring the moving stability of the sliding beam 22.

[0060] Specifically, a pair of clamping bars 212 are provided on both sides of the rack 211.

[0061] In a specific embodiment of the present invention, as Figure 1 and Figure 5 shown in the figure, the inside of the sliding beam 22 is hollow, and an inspection opening is provided at the top of the sliding beam 22. A cover plate 223 is detachably connected to the inspection opening. Preferably, the inspection opening is arranged corresponding to the position of the driving member, and the driving member can be inspected through the inspection opening. The cover plate 223 is detachably connected to the top of the sliding beam 22 by bolts. The outer contour of the sliding beam 22 is preferably square.

[0062] Furthermore, the guide rail 21 includes a top plate, a bottom plate, and two support plates that are supported and connected between the top plate and the bottom plate. The two support plates are arranged opposite to each other.

[0063] Next, the working principle of the automatic hole positioning and assembling fixture for the U-rib of the steel beam bridge deck top plate of the present invention will be described.

[0064] Adjust the position of the positioning seat 23 according to the spacing requirements of the U-ribs. After the positioning seat 23 is adjusted, it is fixed. Insert positioning pins on both sides of the U-ribs, and then hoist the U-ribs onto the positioning and assembling fixture, so that the positioning pins inserted on the U-ribs are snapped into the positioning grooves, and the ends of the U-ribs are sleeved on the positioning seats. After all the U-ribs are positioned and connected, start the motor. The motor drives the gear to rotate, and then the gear moves along the rack, realizing the movement of the sliding beam 22. The two motors are feedback-adjusted through the high-precision synchronous flow distribution valve of the hydraulic station to achieve synchronous accuracy. Within a stroke of 3.2 m, a synchronous accuracy of 1.5 mm can be achieved, and the control of the motor can be realized through a remote controller, enabling the operator to operate at any position nearby. The sliding beam moves forward until the limiting member contacts the positioning stop bar. At this time, stop the operation of the motor. The sliding beam 22 pushes the U-ribs on it onto the top plate, completing the precise positioning of the U-ribs on the top plate. Subsequently, the welding operation between the U-ribs and the top plate can be carried out. After welding, the positioning pins can be taken out, the connection between the U-ribs and the positioning seats can be released, and then start the motor to reset the sliding beam 22. At this time, the production process of the next top plate unit can be entered.

[0065] The beneficial effects of the automatic hole positioning and assembling jig for the U-rib of the steel girder bridge deck slab of the present invention are as follows:

[0066] The automatic positioning of the U-rib is realized, the scribing process is omitted, the assembling quality of the slab unit is improved, and at the same time, the automatic synchronous walking and accurate positioning are reliable, with strong versatility, which improves the automatic manufacturing level of the slab unit and is beneficial to ensuring and improving the mass manufacturing quality of the slab unit.

[0067] The positioning seat can be adjusted arbitrarily according to the requirements of the U-rib spacing, with wide applicability.

[0068] In the prior art scribing alignment process, the scribing work of each slab unit needs to be completed by 3 people, and the scribing time is between 15 minutes and 20 minutes. Normally, 6 slab units are produced per shift, that is, 6×(15 - 20 minutes) / 60 hours×3 people×50 yuan / (person×hour) = 225 - 300 yuan / shift. There are 3 shifts per day, and calculated according to 27 days per month, that is, 225 - 300 yuan / shift×3×27 = 18225 - 24300 yuan. For the whole year of 12×

[0069] (18225 - 24300) = 220,000 - 290,000 yuan. The present invention omits the scribing operation step, and can save labor costs of 220,000 - 290,000 yuan on average throughout the year, and can also ensure the quality.

[0070] The present invention has been described in detail above in combination with the embodiments in the drawings. Those of ordinary skill in the art can make various variations to the present invention according to the above description. Therefore, some details in the embodiments should not constitute a limitation to the present invention, and the protection scope of the present invention will be defined by the scope defined in the appended claims.

Claims

1. An automatic hole positioning and assembling fixture for the U-rib of the steel girder bridge deck roof slab, Characterized in that, Comprising: A pair of guide rails; A sliding beam slidably arranged on the pair of guide rails; A plurality of positioning seats which are installed on the sliding beam in an adjustable position and are used for positioning the U-rib; And A platform plate arranged at one end of the pair of guide rails away from the sliding beam and used for placing the roof slab; The positioning seat includes a positioning plate and a pair of positioning members installed on the positioning plate, and positioning grooves are arranged on the positioning members; Positioning holes are formed in the U-rib corresponding to the positioning grooves, and the U-rib and the positioning seat are connected by positioning pins passing through the positioning holes and the positioning grooves; When positioning and connecting the U-rib and the positioning seat, the end of the U-rib is sleeved on the pair of positioning members, and the pair of positioning members support inside the U-rib, and then the positioning pin passes through the positioning hole on the U-rib and the positioning groove on the positioning seat, realizing the positioning connection between the U-rib and the positioning seat; The positioning member is U-shaped, and the internal U-shaped space is the positioning groove, and an enlarged opening is arranged at the mouth of the positioning groove; A U-shaped connecting plate is arranged on the positioning plate, installation grooves are arranged on both sides of the connecting plate, the positioning member is attached to the installation grooves and is fixedly connected to the connecting plate by bolts; the side contour after the connecting plate and the positioning member are connected is adapted to the internal contour of the U-rib to realize the positioning and guiding of the U-rib; the side of the connecting plate is an inclined surface, and the outer side surface of the positioning member is flush with the inclined surface, and the inclined surface can play a guiding role in the U-rib sleeved on it, so that the U-rib is smoothly sleeved on the positioning seat; A sliding groove is arranged on the sliding beam; A positioning screw is connected to the positioning plate, the head of the positioning screw is slidably arranged in the sliding groove, and the position of the positioning seat is adjusted by sliding the positioning screw along the sliding groove. After the position of the positioning seat is adjusted, the positioning seat is fastened by a positioning nut screwed on the positioning screw to fix the position of the positioning seat; A positioning stop is arranged on one side of the platform plate close to the sliding beam, and a limiting member is arranged at the bottom of the sliding beam corresponding to the positioning stop, and the movement of the sliding beam is limited by the limiting member abutting against the positioning stop; The outer side surface of the positioning stop is located inside the outer side surface of the platform plate, and the outer side surface of the positioning stop is used for abutting against the limiting member to limit the displacement of the sliding beam; the inner side surface of the positioning stop is used for being attached to the side of the roof slab placed on the platform plate to realize the positioning of the roof slab.

2. The automatic hole positioning and assembling fixture for the U-rib of the steel girder bridge deck roof slab according to claim 1, Characterized in that, A slide rail is arranged on the sliding beam, and a groove sleeved on the slide rail is arranged on the positioning seat corresponding to the slide rail.

3. The automatic hole positioning and assembling fixture for the U-rib of the steel girder bridge deck roof slab according to claim 1, Characterized in that, A rack is arranged on the guide rail; A gear meshing with the rack is rotatably connected to the bottom of the sliding beam, and a driving member drivingly connected to the gear is arranged inside the sliding beam. The driving member can drive the gear to rotate, so that the gear moves along the rack, driving the sliding beam to move along the guide rail.

4. The automatic hole positioning and assembling tire for the U-rib of the steel girder bridge deck roof as described in claim 3, characterized in that, the driving member is a motor, the driving shaft of the motor is connected to the bottom of the sliding beam through a bearing, and a part of the driving shaft extends out of the bottom of the sliding beam and is fixedly connected to the gear.

5. The automatic hole positioning and assembling tire for the U-rib of the steel girder bridge deck roof as described in claim 1, characterized in that, a clamping seat is provided at the bottom of the sliding beam corresponding to the guide rail, and the clamping seat is sleeved on the guide rail.

6. The automatic hole positioning and assembling tire for the U-rib of the steel girder bridge deck roof as described in claim 1, characterized in that, the inside of the sliding beam is hollow, a maintenance opening is provided at the top, and a cover plate is detachably connected to the maintenance opening.

7. The automatic hole positioning and assembling tire for the U-rib of the steel girder bridge deck roof as described in claim 1, characterized in that, a hand hole is provided at the end of the U-rib corresponding to the positioning seat.

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