A bolt-up device

Abstract

The application discloses a bolt feeding device, which comprises a bolt arranging mechanism and a bolt feeding mechanism, the bolt arranging mechanism comprises a hopper, a bolt arranging groove is arranged in the hopper, the bolt arranging groove extends outwardly through the hopper, the bolt feeding mechanism comprises a bolt conveying groove, the bolt conveying groove is arranged below the bolt arranging groove, and a wind gun module is arranged below the bolt conveying groove, wherein the width of the bolt arranging groove is smaller than the width of a bolt cap and larger than the diameter of a screw rod part of a bolt. The bolt feeding device can automatically arrange bolts, automatically feed the arranged bolts, has high automation degree, reduces the labor intensity of workers and improves the working efficiency of bolt feeding.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of pipe pile production equipment, and particularly relates to a bolt feeding device. BACKGROUND

[0002] Pipe pile is a pile foundation material commonly used in infrastructure construction and is an important concrete product, which is widely used in the foundation engineering of various buildings and structures. In the pipe pile production process, two head and tail plates are respectively installed at both ends of a mold, and a prepared reinforcement cage is placed in the mold and fixed with the head and tail plates. The head and tail plates are provided with bolt holes, and the end of the reinforcement passes through the bolt holes and is fixed to the head and tail plate by a fastener. However, in the existing pipe pile production, the installation of the pipe pile head and tail plate bolts still adopts a handheld air gun dismounting technology, which has the problems of high labor intensity of workers, waste of labor, low work efficiency and long time consumption. Therefore, in order to avoid the shortcomings in the prior art, it is necessary to improve the prior art. SUMMARY

[0003] The present application aims to at least solve one of the technical problems in the prior art. To this end, the present application provides a bolt feeding device, which can automatically arrange bolts and automatically feed the bolts after arranging the bolts in a direction, has high automation degree, reduces the labor intensity of workers, improves the work efficiency of bolt feeding, reduces the labor cost and improves the economic benefit.

[0004] According to one aspect of the present application, a bolt feeding device is provided, which comprises a bolt arranging mechanism and a bolt feeding mechanism. The bolt arranging mechanism comprises a hopper, and a bolt arranging groove is arranged in the hopper and extends outwardly through the hopper. The bolt feeding mechanism comprises a bolt conveying groove arranged below the bolt arranging groove, and a wind gun module is arranged below the bolt conveying groove. The width of the bolt arranging groove is smaller than the width of a bolt cap and larger than the diameter of a screw rod part of a bolt.

[0005] The bolt feeding device has at least the following beneficial effects: the bolt feeding device can automatically arrange the bolts, automatically feed the bolts after the bolts are arranged in a direction, and first pour the bolts into a hopper, drive the bolts to move by moving the hopper, and make the bolts fall into bolt arrangement grooves in different directions under the driving of the hopper. However, since the width of the bolt arrangement groove is smaller than the width of the bolt cap, the bolt cap cannot fall into the bolt arrangement groove, only the shank part of the bolt can fall into the bolt arrangement groove, and therefore the bolt can correctly fall into the bolt arrangement groove in a posture that the shank part is below and the bolt cap is above. The bolts in other postures cannot fall into the bolt arrangement groove, and the bolts that cannot fall into the bolt arrangement groove will not be stuck above the bolt arrangement groove, because the bolts that cannot fall into the bolt arrangement groove above the bolt arrangement groove will be pushed by the hopper and lifted up, and the postures of the bolts will change. When the bolts reach the posture that the shank part is below and the bolt cap is above, the bolts can normally fall into the bolt arrangement groove and slide out of the hopper along the bolt arrangement groove under the action of gravity. The bolts are arranged in the same posture to enable the bolt feeding mechanism to feed the bolts in the same direction, and there is no need to search for the position of the bolt cap to tighten the bolt cap. After the bolt slides out along the bolt arrangement groove, the bolt falls into a bolt conveying groove, and the bolt cap can fall into the bolt conveying groove. Therefore, when the bolts fall into the bolt conveying groove one by one from the bolt arrangement groove, the bolts are arranged in a posture along the direction of the bolt conveying groove, the bottom of the bolt abuts against the top of an adjacent bolt, and the bolt slides along the bolt conveying groove. The air gun module is arranged below the bolt conveying groove, locks the bolt conveyed from the bolt conveying groove, and completes the automatic bolt feeding process. The bolt feeding device automatically arranges, conveys and locks the bolts, automatically completes the bolt feeding process, reduces the labor intensity of workers, realizes automation, improves the working efficiency of bolt feeding, and reduces the cost.

[0006] In some embodiments, the output end of the bolt arrangement groove is provided with a first bolt pushing structure.

[0007] In some embodiments, the output end of the bolt conveying groove is provided with a second bolt pushing structure.

[0008] In some embodiments, a guide groove is arranged below the output end of the bolt conveying groove.

[0009] In some embodiments, a supporting part is arranged below the guide groove.

[0010] In some embodiments, a first driving air cylinder is arranged on the side of the hopper, the first driving air cylinder is connected with the hopper, and the first driving air cylinder drives the hopper to reciprocate up and down.

[0011] In some embodiments, a second driving air cylinder is connected with the air gun module, and the second driving air cylinder drives the air gun module to reciprocate horizontally.

[0012] In some embodiments, a first height-limiting plate is arranged above the bolt arranging groove, and / or a second height-limiting plate is arranged above the bolt conveying groove.

[0013] In some embodiments, a guide plate is arranged below the guide groove, and a guide protrusion is arranged on the supporting part and arranged in the guide groove.

[0014] In some embodiments, a bolt cap outlet is formed between the hopper and the bolt arranging groove, and the height of the bolt cap outlet is greater than the thickness of the bolt cap and less than the height of the bolt.

[0015] In some embodiments, the hopper is arranged on both sides of the bolt arranging groove.

[0016] In some embodiments, a connecting plate is arranged on the hopper, and the connecting plate connects the hoppers arranged on both sides of the bolt arranging groove.

[0017] In some embodiments, two inclined surfaces are arranged on the hopper, and the inclined surfaces are arranged to be inclined towards the bolt arranging groove.

[0018] In some embodiments, the supporting part is provided with a limiting recess matched with the shape of the bolt, and the limiting recess and the air gun module are at the same horizontal height. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 FIG. 1 is a schematic view of the bolt device according to the present application;

[0020] Figure 2 FIG. 2 is a schematic view of the bolt device according to the present application from another angle;

[0021] Figure 3 FIG. 3 is a schematic view of the bolt arranging mechanism of the bolt device according to the present application;

[0022] Figure 4 FIG. 4 is a schematic view of the bolt arranging mechanism of the bolt device according to the present application from a side view;

[0023] Figure 5 FIG. 5 is a schematic view of the bolt arranging mechanism of the bolt device according to the present application;

[0024] Figure 6 FIG. 6 is a partial schematic view of the supporting part of the bolt device according to the present application;

[0025] Figure 7 FIG. 7 is a partial schematic view of the supporting part of the bolt device according to the present application from another angle;

[0026] Figure 8 This is a partial schematic diagram of the second ejector bolt structure of the bolt device of the present invention;

[0027] Figure 9 This is a schematic diagram of the first ejector bolt structure of the bolt device of the present invention.

[0028] In the diagram: 110, Bolt cap outlet; 120, First guide rod; 200, Hopper; 210, Inclined surface; 220, Connecting plate; 230, First drive cylinder; 300, Bolt arrangement groove; 310, First height limit plate; 320, First bolt ejection structure; 330, First cylinder; 340, Push plate; 350, Bolt position; 360, Mounting plate; 400, Bolt transport groove; 410, Second height limit plate; 500, Second bolt ejection structure; 510, Second cylinder; 600, Guide groove; 610, Gap; 700, Support part; 710, Guide protrusion; 720, Guide plate; 730, Guide groove; 740, Limiting recess; 800, Pneumatic wrench module; 810, Second drive cylinder; 820, Second guide rod; 900, Bolt arrangement mechanism; 1000, Bolt mounting mechanism. Detailed Implementation

[0029] The present invention will now be described in further detail with reference to the accompanying drawings.

[0030] like Figures 1-8 As shown, a bolt mounting device of the present invention includes a bolt arranging mechanism 900 and a bolt mounting mechanism 1000. The bolt arranging mechanism 900 includes a hopper 200, and a bolt arranging groove 300 is provided in the hopper 200. The bolt arranging groove 300 extends outward through the hopper 200. The bolt mounting mechanism 1000 includes a bolt transport groove 400, which is located below the bolt arranging groove 300. A pneumatic wrench module 800 is located below the bolt transport groove 400. The width of the bolt arranging groove 300 is smaller than the width of the bolt head and larger than the diameter of the bolt shank.

[0031] The output end of the bolt arrangement groove 300 is provided with a first push-out bolt structure 320, which pushes the bolt that slides out of the bolt arrangement groove 300 toward the bolt transport groove 400.

[0032] The output end of the bolt transport groove 400 is provided with a second ejector bolt structure, which ejects the bolt from the output end of the bolt transport groove 400, allowing the bolt to leave the bolt transport groove 400.

[0033] A guide groove 600 is provided below the output end of the bolt transport groove 400, and a support part 700 is provided below the guide groove 600. The bolt is pushed into the guide groove 600 by the second bolt push-out structure 500. Figure 8As shown, the second bolt ejection structure 500 pushes the bolt and then abuts against the bolt in the bolt transport groove 400, ensuring that the bolts can only fall into the guide groove 600 one by one. Under the action of gravity, the bolts fall along the guide groove 600. Due to the guiding effect of the guide groove 600, the bolts fall horizontally along the guide groove 600 to the support part 700. The support part 700 will support the bolts falling from the guide groove 600, making it convenient for the air hammer module 800 to lock the bolts.

[0034] The feed end of the bolt arrangement groove 300 is inside the hopper 200, and the output end is outside the hopper 200. The bolt arrangement groove 300 is inclined so that the bolts inside the bolt arrangement groove 300 can slide along the bolt arrangement groove 300 under the action of gravity and slide from inside the hopper 200 to outside the hopper 200. A vertically downward discharge port is also provided at the output end of the bolt arrangement groove 300. Thus, by providing a vertically downward discharge port, when the bolt arrangement groove 300 is inclined, the bolts will flip from a vertically downward state to a horizontal state inside the bolt arrangement groove 300, so that the bolts can be discharged horizontally from the discharge port of the bolt arrangement groove 300, arranging the bolts horizontally to meet the purpose of horizontal bolt installation.

[0035] The outlet of the bolt arrangement groove 300 is vertically downward. Specifically, in this embodiment, the outlet of the bolt arrangement groove 300 is also bent. After bending, the outlet of the bolt arrangement groove 300 is vertically downward. That is, the bolt arrangement groove 300 is designed with a roughly elephant trunk-shaped structure. When the bolt falls into the bolt arrangement groove 300, it can be horizontally discharged from the outlet of the bolt arrangement groove 300 through the vertically downward outlet, so as to arrange the bolts horizontally and meet the purpose of horizontal bolt installation.

[0036] The side of the hopper 200 is also provided with a first guide rod 120. The hopper 200 is mounted on the first guide rod 120 so that the hopper 200 can move up and down along the first guide rod 120.

[0037] like Figures 1-3 As shown, the hoppers 200 are arranged on both sides of the bolt arrangement groove 300. The hoppers 200 are provided with connecting plates 220, which are respectively connected to the hoppers 200 on both sides of the bolt arrangement groove 300. This allows the hoppers 200 arranged on both sides of the bolt arrangement groove 300 to be raised and lowered synchronously. It is not necessary to set up a cylinder to drive each of the hoppers 200 on both sides of the bolt arrangement groove 300, thus saving costs.

[0038] Two inclined surfaces 210 are provided on the hopper 200. The inclined surfaces 210 are inclined towards the bolt arrangement groove 300. The bolts on the hopper 200 will slide into the bolt arrangement groove 300 due to the inclination of the inclined surfaces 210 towards the bolt arrangement groove 300.

[0039] likeFigure 1 , Figure 3 As shown, the hopper 200 and the bolt arrangement groove 300 together form a bolt cap outlet 110. The height of the bolt cap outlet 110 is greater than the thickness of the bolt cap and less than the height of the bolt, to prevent the bolt from falling out of the bolt cap outlet 110. When the bolt falls into the bolt arrangement groove 300 with the screw part down and the bolt part up, the bolt cannot fall out of the hopper 200 from the bolt cap outlet 110 between the hopper 200 and the bolt arrangement groove 300 because the height of the bolt cap outlet 110 is less than the height of the bolt. However, when the bolt is in the bolt arrangement groove 300 with the screw part down and the bolt part up, it will slide out of the hopper 200 along the bolt arrangement groove 300. Since the height of the bolt cap outlet 110 is greater than the thickness of the bolt cap, the bolt cap can leave the hopper 200 through the bolt cap outlet 110.

[0040] like Figures 1-4 As shown, a first drive cylinder 230 is provided on the lower side of the hopper 200. The first drive cylinder 230 is connected to the hopper 200 and drives the hopper 200 to move up and down reciprocally. The hopper 200 continuously moves up and down reciprocally, lifting up bolts that are stuck above the bolt arrangement groove 300 and have failed to fall into it. The bolts are changed in posture by the hopper 200 until they can fall into the bolt arrangement groove 300 with the screw part at the bottom and the bolt head at the top. In other embodiments, the hopper 200 can also be driven by an electric cylinder to make the hopper 200 move and drive the bolts to flip and change their posture.

[0041] The first ejector bolt structure 320 includes a first cylinder 330, and the second ejector bolt structure includes a second cylinder 510. Using cylinders is easy to control and simple to adjust, making them suitable as structures for ejector bolts. In other embodiments, an electric cylinder can be used to drive the ejector bolt.

[0042] like Figure 9 As shown, the first bolt ejection structure 320 includes a mounting plate 360, a first cylinder 330, and a push plate 340. The mounting plate 360 ​​is installed at the outlet of the bolt arrangement groove 300, the first cylinder 330 is installed on the mounting plate 360, and the push plate 340 is connected to the drive end of the first cylinder 330. Driven by the first cylinder 330, the push plate 340 moves across the outlet of the bolt arrangement groove 300, ejecting the bolt. Specifically, in this embodiment, the mounting plate 360 ​​is installed on one side of the bolt arrangement groove 300, and the push plate 340 is connected to the drive end of the first cylinder 330. The first cylinder 330 can drive the push plate 340 to move across the outlet of the bolt arrangement groove 300, pushing the bolt at the outlet of the bolt arrangement groove 300.

[0043] Further, the push plate 340 is provided with bolt positions 350. When the push plate 340 is driven by the first cylinder 330 to move on the discharge port of the bolt arrangement groove 300, the bolts can fall on the bolt positions 350, and the bolts can be pushed out by driving the push plate 340 by the first cylinder 330. Specifically, in the embodiment, the push plate 340 is provided with a substantially T-shaped hole, the T-shaped hole is the bolt position 350, the head of the bolt falling on the bolt arrangement groove 300 can fall on the head of the T-shaped hole, the screw rod of the bolt can fall on the bottom of the T-shaped hole, when the T-shaped hole is opposite to the bottom of the bolt arrangement groove 300, the bolt can fall in the T-shaped hole and be supported by the mounting plate 360, after the push plate 340 is driven to move by the cylinder, the bolt is pushed out, and the mounting plate 360 no longer supports the bolt, so that the bolt can be used, and the head of the T-shaped hole is also partially located directly below the bolt arrangement groove 300, the head of the second bolt in the bolt arrangement groove 300 can be pre-fallen into the head of the T-shaped hole, when the push plate 340 is retracted after pushing out the first bolt, the first height limiting plate 310 arranged on the bolt arrangement groove 300 can block the second bolt, so that the second bolt is completely fallen into the T-shaped hole and waits to be pushed out, and the cycle is repeated, so that the bolts can be safely discharged.

[0044] As shown in Figures 1-8 , the upper part of the bolt arrangement groove 300 is also provided with a first height limiting plate 310, and the upper part of the bolt conveying groove 400 is provided with a second height limiting plate 410. The first height limiting plate 310 is used to prevent the bolts from being stacked together in the bolt arrangement groove 300, which affects the first bolt pushing out structure to push out the bolts one by one. If the bolts are stacked together in the bolt arrangement groove 300, the bottom of the bolt cap is stacked on the bolt cap of another bolt, at this time, the height is higher than the height of the first height limiting plate 310, the stacked bolts cannot pass through the first height limiting plate 310, and the bolts cannot be stacked in the form of falling into the output end of the bolt arrangement groove 300, which affects the first bolt pushing out structure to push the bolts one by one into the bolt conveying groove 400. The second height limiting plate 410 is used to prevent the screw rod of the bolt from being stacked on the bolt cap of another bolt, which affects the second pushing out structure to push the bolts one by one into the guide groove 600. The first height limiting plate 310 and the second height limiting plate 410 can also prevent the bolts from sliding out during the sliding process of the bolts in the bolt arrangement groove 300 and the bolt conveying groove 400, and play a limiting role for the bolts.

[0045] As shown in Figure 1 , 2As shown in Figure 5, the air wrench module 800 is connected to a second drive cylinder 810. The second drive cylinder 810 drives the air wrench module 800 to reciprocate horizontally. The air wrench module 800 is used to tighten bolts. During the rotation and tightening process, the bolts will be screwed into the head and tail plates or other components. During this process, it is necessary to move along the bolt direction. Therefore, the second drive cylinder 810 is needed to drive the air wrench module 800 to reciprocate horizontally. The bolts are pushed in and pulled out during the tightening process. Since the bolts are placed horizontally in the support part 700, the air wrench module 800 needs to perform horizontal reciprocating motion.

[0046] The air jet module 800 is connected to a second guide rod 820. The air jet module 800 is mounted on the second guide rod 820. The second guide rod 820 is set horizontally so that the air jet module 800 can move along the second guide rod 820 in a horizontal direction and screw in the bolts in a horizontal direction.

[0047] like Figure 6 As shown, a guide plate 720 is provided below the guide groove 600, and a guide groove 730 is provided on the guide plate 720. The support part 700 is rotatably connected to the guide plate 720. A guide protrusion 710 is provided on the support part 700 and is located in the guide groove 730. During the movement of the air blower module 800, the support part 700 can support the bolt and prevent the bolt from falling off. During the process of gradually tightening the bolt, the bolt gradually enters the head and tail plates or other components. At this time, the guide protrusion 710 will move along the guide groove 730 as the air blower module 800 moves forward, thereby driving the support part 700 to rotate along the direction of the guide groove 730, so that the support part 700 separates from the bolt, which facilitates the bolt to complete the locking action and prevents the support part 700 from colliding with the head and tail plates or other components due to untimely separation. It also prevents the support part 700 from being directly locked by the bolt due to untimely separation.

[0048] like Figures 5-8 As shown, the guide groove 600 is vertically arranged, and a gap 610 is provided on the side of the guide groove 600. The width of the gap 610 is greater than the diameter of the bolt shank and less than the width of the bolt head. This allows the bolt falling from the bolt transport groove 400 into the guide groove 600 to fall in a horizontal posture with the bolt head inside the guide groove 600 and the bolt part outside the guide groove 600. The bolt part will extend outward from the gap 610 on the side of the guide groove 600 and fall vertically along the guide groove 600 in a horizontal posture under the action of gravity.

[0049] like Figure 6 , Figure 7As shown, the supporting part 700 is provided with a limiting recess 740 in the shape of a cooperating bolt, the limiting recess 740 and the air cannon module 800 are at the same horizontal height, the limiting recess 740 can enable the bolt on the supporting part 700 to be placed on the supporting part 700 in a horizontal posture and not to be offset, the limiting recess 740 being at the same horizontal height as the air cannon module 800 can facilitate the air cannon module 800 to lock the bolt on the supporting part 700.

[0050] The present application can automatically arrange the bolts, and automatically place the bolts after arranging the bolts by direction. First, the bolts are poured into the hopper 200, the hopper 200 moves to drive the bolts to move, and the bolts fall into the bolt arrangement groove 300 in different directions under the driving of the hopper 200. However, since the width of the bolt arrangement groove 300 is smaller than the width of the bolt cap, the bolt cap cannot fall into the bolt arrangement groove 300, only the shank part of the bolt can fall into the bolt arrangement groove 300, so the bolt can correctly fall into the bolt arrangement groove 300 in the posture of the shank part below and the bolt cap above, and the bolts in other postures cannot fall into the bolt arrangement groove 300. The bolts that cannot fall into the bolt arrangement groove 300 will not always be stuck above the bolt arrangement groove 300, because under the movement of the hopper 200, the bolts that cannot fall into the bolt arrangement groove 300 above the bolt arrangement groove 300 will be pushed by the hopper 200 and lifted, and the posture of the bolts will change. When the bolts reach the posture of the shank part below and the bolt cap above, the bolts can normally fall into the bolt arrangement groove 300 and slide out of the hopper 200 along the bolt arrangement groove 300 under the action of gravity. The bolts are arranged in the same posture to enable the bolt placing mechanism 1000 to place the bolts in the same direction, without searching for the position of the bolt cap to tighten. After the bolts slide out of the bolt arrangement groove 300, the first bolt pushing-out structure 320 is arranged at the output end of the bolt arrangement groove 300, the first bolt pushing-out structure 320 pushes the bolts sliding out of the bolt arrangement groove 300 to the bolt conveying groove 400, and the bolt cap can fall into the bolt conveying groove 400. Therefore, when the bolts fall into the bolt conveying groove 400 one by one from the bolt arrangement groove 300, the bolts are arranged in the posture along the direction of the bolt conveying groove 400, the bottom of the bolt abuts against the top of the adjacent bolt, and the bolts slide along the bolt conveying groove 400. At the output end of the bolt conveying groove 400, the bolts are pushed by the second bolt pushing-out structure 500 to the guide groove 600, and the bolts are arranged in the posture along the direction of the guide groove 600. Figure 8As shown, the second bolt pushing-out structure 500 just abuts against the bolts in the bolt conveying groove 400 after pushing the bolts, ensuring that the bolts can only fall into the guide groove 600 one by one and fall along the guide groove 600 under the action of gravity. Due to the guiding effect of the guide groove 600, the bolts fall along the guide groove 600 in a horizontal posture to the bearing part 700. At this time, the air gun module 800 moves and is automatically aligned with the bolts falling into the bearing part 700, locks the bolts, and completes the automatic bolt feeding process. The bolt feeding device automatically arranges, conveys and locks the bolts, automatically completes the bolt feeding process, reduces the labor intensity of workers, realizes automation, improves the working efficiency of bolt feeding, and reduces the cost.

[0051] The above only describes some embodiments of the present application. For those skilled in the art, without departing from the inventive concept, several modifications and improvements can be made, which are within the scope of protection of the present application.

Claims

1. A bolt-up device characterized by, The utility model relates to a bolt arranging device, which comprises a hopper, a bolt arranging groove is arranged in the hopper, and the bolt arranging groove extends outwardly through the hopper. The utility model relates to a bolt arranging device, which comprises a hopper, a bolt arranging groove is arranged in the hopper, and the bolt arranging groove extends outwardly through the hopper. The width of the bolt arranging groove is smaller than the width of the bolt cap and larger than the diameter of the screw rod of the bolt. The output end of the bolt arranging groove is provided with a first bolt pushing structure.

2. The bolt-up apparatus of claim 1, wherein, The output end of the bolt conveying groove is provided with a second bolt pushing structure.

3. The bolt-up apparatus of claim 1, wherein, The side of the hopper is provided with a first driving air cylinder, which is connected with the hopper and drives the hopper to reciprocate up and down.

4. The bolt-up apparatus of claim 1, wherein, The wind gun module is connected with a second driving air cylinder, which drives the wind gun module to reciprocate horizontally.

5. The bolt-up apparatus of claim 1, wherein, The upper part of the bolt arranging groove is further provided with a first height limiting plate, and / or the upper part of the bolt conveying groove is provided with a second height limiting plate.

6. The bolt-up apparatus of any one of claims 1-5, wherein, The supporting part is provided with a guide protrusion, which is arranged in the guide groove.

7. The bolt-up apparatus of claim 1, wherein, The hopper and the bolt arranging groove jointly form a bolt cap outlet, the height of the bolt cap outlet is larger than the thickness of the bolt cap and smaller than the height of the bolt.

8. The bolt-up apparatus of any one of claims 1-5, wherein, The hopper is arranged on both sides of the bolt arranging groove.

9. The bolt-up apparatus of any one of claims 1-5, wherein, The hopper is provided with a connecting plate, which is connected with the hoppers on both sides of the bolt arranging groove respectively.

10. The bolt-up apparatus of claim 9, wherein, The hopper is provided with two inclined surfaces, which are arranged obliquely towards the bolt arranging groove.

11. The bolt-up apparatus of any one of claims 1-5, wherein, The supporting part is provided with a limiting recess matched with the shape of the bolt, and the limiting recess and the wind gun module are at the same horizontal height.

12. The bolt-up apparatus of claim 1, wherein, ​

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