Slope concrete spraying equipment

Abstract

The utility model provides side slope concrete spraying equipment which comprises a slope top moving mechanism and a slope bottom moving mechanism which are arranged on the top of a side slope and the bottom of the side slope, a guide mechanism parallel to the side slope is arranged between the slope top moving mechanism and the slope bottom moving mechanism, and a spraying mechanism capable of sliding in the height direction of the side slope is arranged on the guide mechanism. A lifting mechanism connected with the spraying mechanism is arranged on the slope top moving mechanism, a concrete spraying machine is arranged on the slope bottom moving mechanism, and the conveying end of the concrete spraying machine is connected with the spraying mechanism through a telescopic hose. The moving mechanisms are arranged at the top and the bottom of the side slope and matched with the guide mechanism parallel to the side slope, so that the spraying mechanism can stably ascend and descend along the guide mechanism, ecological concrete is accurately sprayed to the side slope, mechanization and continuity of spraying operation are effectively achieved, and the working efficiency is improved. And the phenomena of concrete dispersion and waste caused by long distance and large height in manual operation are avoided, and the spraying uniformity and the construction quality are remarkably improved.

Description

Technical Field

[0001] This utility model relates to the field of slope protection, and in particular to a slope concrete spraying device. Background Technology

[0002] During the construction of connecting channels, if the slope rock strata have poor stability and are prone to local collapse and deformation along weak structural surfaces, posing safety risks such as slope collapse and falls from heights, the "stepped blasting + hydraulic breaker excavation" method is usually adopted to form a flat and stable stepped slope. At the same time, after each step is formed, ecological concrete is sprayed in a timely manner to construct an effective slope protection system.

[0003] However, current eco-friendly concrete spraying operations mainly rely on manual labor: workers must stand on elevated platforms holding spray nozzles to spray the slope in sections. Due to limitations in working height and worker physical strength, the spraying range is restricted, especially in distant areas where concrete is prone to scattering and splashing, resulting in material waste. Furthermore, to ensure spraying quality and continuous coverage, workers need to operate continuously and stably, leading to high labor intensity, low efficiency, and significant human-induced impact on construction quality, resulting in high overall construction costs and difficulty in effectively improving progress. Therefore, this paper proposes a slope concrete spraying device and its construction method to solve the above problems. Utility Model Content

[0004] The main purpose of this utility model is to provide a slope concrete spraying equipment to solve the problems of uneven spraying, material waste, high labor intensity and low efficiency of existing spraying methods.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a slope concrete spraying device, including a slope top moving mechanism and a slope bottom moving mechanism set on the top and bottom of the slope, a guide mechanism parallel to the slope is set between the slope top moving mechanism and the slope bottom moving mechanism, a spraying mechanism that can slide along the slope height direction is set on the guide mechanism, a lifting mechanism connected to the spraying mechanism is set on the slope top moving mechanism, and a concrete spraying machine is set on the slope bottom moving mechanism. The conveying end of the concrete spraying machine is connected to the spraying mechanism through a telescopic hose.

[0006] In the preferred embodiment, the guiding mechanism includes two connecting parts that are respectively connected to the slope top moving mechanism and the slope bottom moving mechanism. Two parallel guide frames are arranged between the two connecting parts. The guide frame includes a frame body, a working groove is provided in the frame body, and sliding rods located on both sides of the working groove are provided on the frame body.

[0007] In the preferred embodiment, the spraying mechanism includes two symmetrically arranged first mounting plates. The front end of the first mounting plate is provided with a first sliding sleeve shaft that is slidably fitted outside the slide rod. A mounting frame is provided between the two first mounting plates. A spraying head is provided through the mounting frame. The concrete spraying machine is connected to the spraying head through a telescopic hose. A first lifting lug is provided on the top of the first mounting plate.

[0008] In the preferred embodiment, both first mounting plates are provided with rotary bearings, and both ends of the mounting bracket are provided with rotary shafts installed in the rotary bearings. The ends of the rotary shafts pass through the rotary bearings and are provided with push-pull rods on the outside. The front side of the first sliding sleeve shaft is hinged with a first telescopic cylinder, and the telescopic end of the first telescopic cylinder is hinged to the end of the push-pull rod.

[0009] In the preferred embodiment, a connecting frame is provided between the top and bottom of the two first mounting plates, and a laser rangefinder and an image acquisition device are provided on the opposite sides of the two connecting frames.

[0010] In the preferred embodiment, the slope bottom moving mechanism includes a bottom moving platform, and two sets of first track wheel moving mechanisms are symmetrically arranged at the bottom of the bottom moving platform;

[0011] The slope top moving mechanism includes a top moving platform, two sets of second track wheel moving mechanisms are symmetrically arranged at the bottom of the top moving platform, and a second linear module is arranged at the top of the top moving platform.

[0012] In the preferred embodiment, the lifting mechanism includes a support column and a winch set at the front and rear of the top moving platform. A pulley is provided at the top of the support column, and the wire rope on the winch is wound around the pulley and connected to the spraying mechanism through a hook.

[0013] In the preferred embodiment, the bottom moving platform and the top moving platform are respectively provided with hinge seats for connecting the guide mechanism at their opposite ends, and the two connecting parts of the guide mechanism are rotatably connected to the corresponding hinge seats through rotating shafts.

[0014] In the preferred embodiment, a take-up and release mechanism is provided on the side of the bottom moving platform that is separate from the guide mechanism. The take-up and release mechanism includes a support frame provided on the top of the bottom moving platform. Two rotating shaft seats are symmetrically arranged on the top of the support frame. A drive shaft is rotatably arranged between the two rotating shaft seats. The two ends of the drive shaft pass through the rotating shaft seats and are connected to a take-up drum. A support platform is also provided on the outside of the support frame. A drive device is provided on the support platform. A transmission component is provided between the output shaft of the drive device and the drive shaft. Two third lifting lugs are symmetrically arranged on the top connection part. The wire rope wound on the take-up drum is connected to the corresponding third lifting lug.

[0015] In the preferred embodiment, an angle adjustment mechanism is provided between the slope top moving mechanism and both sides of the guide frame. The angle adjustment mechanism includes a support rod provided on the outside of the frame, a fourth telescopic cylinder is hinged on the support rod, and extension rods are provided on both sides of the top moving platform. The telescopic end of the fourth telescopic cylinder is hinged to the end of the extension rod.

[0016] The wheel body of the second track wheel moving mechanism includes a moving part that moves on the track, and a support part that can abut against the side of the track is provided on the side of the moving part near the slope.

[0017] This utility model provides a slope concrete spraying device. By setting up moving mechanisms at the top and bottom of the slope, and cooperating with a guide mechanism parallel to the slope, the spraying mechanism can stably rise and fall along the guide mechanism to accurately spray ecological concrete onto the slope. This effectively realizes the mechanization and continuity of the spraying operation, avoiding the concrete dispersion and waste caused by long distances and great heights in manual operation. It significantly improves the uniformity of spraying and construction quality. At the same time, the device can flexibly switch the spraying mechanism through the lifting mechanism, improving equipment utilization and construction efficiency, reducing the degree of manual intervention, and lowering labor intensity and construction costs. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0019] Figure 1 This is an overall structural diagram of the present invention;

[0020] Figure 2 This is a structural diagram of the guiding mechanism of this utility model;

[0021] Figure 3 This is a utility model Figure 3 Another perspective on the structure diagram;

[0022] Figure 4 This is a structural diagram of the spraying mechanism of this utility model;

[0023] Figure 5 This is a utility model Figure 5 Exploded structure diagram;

[0024] Figure 6 This is a structural diagram of the slope bottom moving mechanism of this utility model;

[0025] Figure 7 This is a top view of the slope bottom moving mechanism of this utility model;

[0026] Figure 8 This is a structural diagram of the slope top moving mechanism of this utility model;

[0027] Figure 9 This is a top view of the slope top moving mechanism of this utility model;

[0028] Figure 10 This is a structural diagram of the retracting mechanism of this utility model;

[0029] Figure 11 This is a side view of the utility model in its working state;

[0030] In the diagram: 1. Slope bottom moving mechanism; 101. Bottom moving platform; 102. Two-wheel moving mechanism; 103. Hinge seat; 2. Slope top moving mechanism; 201. Top moving platform; 204. Second track wheel moving mechanism; 2040. Moving part; 2041. Support part; 3. Guide mechanism; 301. Connecting part; 302. Guide frame; 3020. Frame; 3021. Working groove; 3022. Slide rod; 3023. Third lifting lug; 4. Spraying mechanism; 401. First mounting plate; 402. First sliding sleeve shaft; 403. Mounting frame; 404. Spray head; 405. Laser rangefinder 406; image acquisition device 407; rotary bearing 408; rotary shaft 409; push-pull rod 410; first telescopic cylinder 411; first lifting lug 412; lifting mechanism 6; winch 601; support column 602; pulley 603; concrete spraying machine 7; take-up and unload mechanism 8; support frame 801; rotating shaft seat 802; transmission shaft 803; take-up drum 804; support platform 805; drive device 806; transmission assembly 807; angle adjustment mechanism 9; support rod 901; fourth telescopic cylinder 902; extension rod 903. Detailed Implementation

[0031] Example 1

[0032] like Figure 1-9 As shown, a slope concrete spraying device includes a slope top moving mechanism 2 and a slope bottom moving mechanism 1 set on the top and bottom of the slope, respectively. A guide mechanism 3 parallel to the slope is set between the slope top moving mechanism 2 and the slope bottom moving mechanism 1. The slope top moving mechanism 2, the slope bottom moving mechanism 1 and the guide mechanism 3 form a "Z" shape adapted to the slope. A spraying mechanism 4 that can slide along the slope height direction is set on the guide mechanism 3. A lifting mechanism 6 connected to the spraying mechanism 4 is set on the slope top moving mechanism 2. A concrete spraying machine 7 is set on the slope bottom moving mechanism 1. The conveying end of the concrete spraying machine 7 is connected to the spraying mechanism 4 through a telescopic hose.

[0033] This design allows the spraying mechanism 4 to be raised and lowered via the guide mechanism 3, thereby utilizing the parallel relationship between the guide mechanism 3 and the slope to achieve spraying work on the slope. This enables close-range and stable spraying or coating work, ensuring the uniformity and thickness of the spray, while avoiding material waste, reducing the workload of construction workers, and greatly improving work efficiency.

[0034] It should be noted that the concrete spraying machine 7 is a common commercially available product, so it will not be described in detail here.

[0035] In the preferred embodiment, the guiding mechanism 3 includes two connecting parts 301 that are respectively connected to the slope top moving mechanism 2 and the slope bottom moving mechanism 1. Two parallel guide frames 302 are arranged between the two connecting parts 301. The guide frame 302 includes a frame body 3020. In this embodiment, the frame body 3020 is a sideways U-shaped structure. The size of the frame body 3020 can be adjusted according to actual needs. The frame body 3020 is provided with a working groove 3021. The working groove 3021 facilitates the spraying mechanism 4 or the curing and film laying mechanism 5 to carry out construction on the slope. The frame body 3020 is provided with sliding rods 3022 located on both sides of the working groove 3021.

[0036] In the preferred embodiment, the spraying mechanism 4 includes two symmetrically arranged first mounting plates 401. The front end of the first mounting plate 401 is provided with a first sliding sleeve shaft 402 that is slidably fitted outside the slide rod 3022. A mounting frame 403 is provided between the two first mounting plates 401. A spraying head 404 is provided through the mounting frame 403. The concrete spraying machine 7 is connected to the spraying head 404 through a telescopic hose. A first lifting lug 412 is provided on the top of the first mounting plate 401, so that the lifting mechanism 6 can use the first lifting lug 412 to lift and lower the spraying mechanism 4 to achieve vertical spraying of the slope. With the movement of the device along the length of the slope, the spraying work of the entire slope can be realized.

[0037] It should be noted that the number of spray heads 404 and concrete spraying machines 7 can be adjusted according to spraying needs.

[0038] In the preferred embodiment, each of the two first mounting plates 401 is provided with a rotary bearing 408, and both ends of the mounting bracket 403 are provided with a rotary shaft 409 installed in the rotary bearing 408. The end of the rotary shaft 409 passes through the rotary bearing 408 and is provided with a push-pull rod 410. The front side of the first sliding sleeve shaft 402 is hinged with a first telescopic cylinder 411. The telescopic end of the first telescopic cylinder 411 is hinged to the end of the push-pull rod 410. The first telescopic cylinder 411 can be an electric cylinder or a hydraulic cylinder.

[0039] With this design, the mounting bracket 403 can be rotated between the two first mounting plates 401 by extending and retracting the first telescopic cylinder 411, thereby adjusting the spray angle of the spray head 404. When there is an unevenness on the slope, the spray angle of the spray head 404 can be adjusted to keep it perpendicular to the slope angle to a certain extent, so as to achieve more precise spray control and ensure the uniformity and thickness of the spray.

[0040] A connecting frame 405 is provided between the top and bottom of the two first mounting plates 401. The connecting frame 405 can enhance the structural strength between the two first mounting plates 401. A laser rangefinder 406 and an image acquisition device 407 are provided on the opposite sides of the two connecting frames 405. Through repeated measurements between the upper and lower sets of laser rangefinders 406 and image acquisition devices 407, the thickness and angle of the spray can be controlled. For example, by measuring the distance from the slope surface by the lower laser rangefinder 406 and calculating it with the preset distance after spraying, the actual thickness to be sprayed can be determined, thereby adjusting the spray. The spraying thickness can be measured by the laser rangefinder 406 above after spraying. If the thickness is not up to standard, a second spraying can be performed. Similarly, the image acquisition device 407 below can collect information on the flatness of the slope and adjust the spraying angle accordingly. After spraying, the image acquisition device 407 above can collect information on the flatness of the slope. It should be noted that the number of laser rangefinders 406 and image acquisition devices 407 can be adjusted according to actual conditions, and the laser rangefinders 406, image acquisition devices 407, and their associated controllers are all commercially available products.

[0041] In the preferred embodiment, the slope bottom moving mechanism 1 includes a bottom moving platform 101, and two sets of first track wheel moving mechanisms 102 are symmetrically arranged at the bottom of the bottom moving platform 101. The first track wheel moving mechanism 102 is a double wheel structure, and one or both sets are drive wheel sets.

[0042] The slope top moving mechanism 2 includes a top moving platform 201. Two sets of second track wheel moving mechanisms 204 are symmetrically arranged at the bottom of the top moving platform 201. The second track wheel moving mechanism 204 is a single wheel structure or a double wheel structure, and one or both sets are drive wheel sets.

[0043] With this design, the device can move on the track through the first track wheel moving mechanism 102 and the second track wheel moving mechanism 204. At the same time, the cooperation between the track wheel and the track can support the device. In addition, the first track wheel moving mechanism 102 and the second track wheel moving mechanism 204 are both commercially available products.

[0044] The lifting mechanism 6 includes a support column 602 and a winch 601 set at the front and rear of the top moving platform 201. A pulley 603 is set at the top of the support column 602. The wire rope on the winch 601 is wound around the pulley 603 and connected to the spraying mechanism 4 through a hook. Thus, the lifting and lowering of the spraying mechanism 4 can be achieved by the winding and unwinding of the winch 601 in conjunction with the gravity of the spraying mechanism 4.

[0045] Example 2

[0046] Further explanation in conjunction with Example 1, such as Figure 1-10 As shown in the structure, in order to facilitate the installation of the device on the slope, the bottom moving platform 101 and the top moving platform 201 are respectively provided with hinge seats 103 for connecting the guide mechanism 3. The two connecting parts 301 of the guide mechanism 3 are rotatably connected to the corresponding hinge seats 103 through the rotating shaft 302, so that the guide mechanism 3 and the top moving platform 201 can be rotated to overlap on the slope.

[0047] In the preferred embodiment, a retractable mechanism 8 is provided on the side of the bottom moving platform 101 that is separate from the guide mechanism 3. This mechanism adjusts the angle of the guide mechanism 3 and also acts as a counterweight. It should be noted that a counterweight block can also be provided on the bottom moving platform 101 to improve its counterweight effect.

[0048] The take-up and take-down mechanism 8 includes a support frame 801 set on the top of the bottom moving platform 101. Two rotating shaft seats 802 are symmetrically arranged on the top of the support frame 801. A drive shaft 803 is rotatably arranged between the two rotating shaft seats 802. The two ends of the drive shaft 803 pass through the rotating shaft seats 802 and are connected to the take-up drum 804. A support platform 805 is also provided on the outside of the support frame 801. A drive device 806 is provided on the support platform 805. The drive device 806 consists of a motor and a reducer. A transmission assembly 807 is provided between the output shaft of the drive device 806 and the drive shaft 803. The transmission assembly 807 can be a synchronous belt and synchronous pulley structure, a chain and sprocket structure, or a gear meshing structure.

[0049] Two third lifting lugs 303 are symmetrically arranged on the top connecting part 301. The steel wire rope wound on the winding drum 804 is connected to the corresponding third lifting lug 303. Thus, the angle of the guide mechanism 3 can be adjusted by winding and unwinding the steel wire rope through the winding drum 804. At the same time, it can be pulled up when not in use, so as to achieve the effect of quick disassembly and easy transfer.

[0050] An angle adjustment mechanism 9 is provided between the top moving mechanism 2 and both sides of the guide frame 302. The angle adjustment mechanism 9 includes a support rod 901 provided on the outside of the frame 3020. A fourth telescopic cylinder 902 is hinged on the support rod 901. The fourth telescopic cylinder 902 is a hydraulic cylinder. Extension rods 903 are provided on both sides of the top moving platform 201. The telescopic end of the fourth telescopic cylinder 902 is hinged to the end of the extension rod 903.

[0051] With this design, the angle of the slope top moving mechanism 2 can be adjusted by extending and retracting the fourth telescopic cylinder 902. After the guide mechanism 3 is adjusted to a suitable angle, the slope top moving mechanism 2 can be placed on the track at the top of the slope by the fourth telescopic cylinder 902.

[0052] The wheel body of the second track wheel moving mechanism 204 includes a moving part 2040 that moves on the track. A support part 2041 that can abut against the side of the track is provided on the side of the moving part near the slope. This design allows the second track wheel moving mechanism 204 to sit on the track by rotation without affecting the support effect of the device.

[0053] It should be noted that, in order to avoid the guide mechanism 3 from becoming unbalanced due to excessive retraction and tipping over, the maximum retraction angle of the guide mechanism 3 is less than 90 degrees, so that the guide mechanism 3 and the slope top moving mechanism 2 can always maintain a forward tilt.

[0054] Example 3

[0055] Further explanation in conjunction with Examples 1 and 2, such as Figure 11 The structure shown, according to the construction method of the above-mentioned slope concrete spraying equipment, includes:

[0056] S1. Lay out the corresponding tracks on the top and bottom of the leveled slope, and anchor the tracks to the ground using anchor bolts.

[0057] S2. Move the bottom moving mechanism 1 of the spraying device to the track below the slope, adjust the guide mechanism 3 to be parallel to the slope surface through the retraction mechanism 8, and then lower the top moving mechanism 2 to the track above the slope through the angle adjustment mechanism 9.

[0058] S3. Connect the wire rope hook on the lifting mechanism 6 to the first lifting lug 412 of the spraying mechanism 4. Then lift the spraying mechanism 4 to the top of the slope, use the concrete spraying machine 7 to supply material to the spraying mechanism 4, and cooperate with the lowering of the lifting mechanism 6 to complete the vertical spraying work. Then move along the length of the slope and repeat the above steps to achieve overall spraying of the slope surface.

[0059] The above embodiments are merely preferred technical solutions of this utility model and should not be considered as limitations on this utility model. The protection scope of this utility model should be the technical solution described in the claims, including equivalent substitutions of the technical features described in the claims. That is, equivalent substitutions and improvements within this scope are also within the protection scope of this utility model.

Claims

1. Slope concrete spraying equipment, characterized by: It includes a slope top moving mechanism (2) and a slope bottom moving mechanism (1) set on the top and bottom of the slope, respectively. A guide mechanism (3) parallel to the slope is set between the slope top moving mechanism (2) and the slope bottom moving mechanism (1). A spraying mechanism (4) that can slide along the slope height direction is set on the guide mechanism (3). A lifting mechanism (6) connected to the spraying mechanism (4) is set on the slope top moving mechanism (2). A concrete spraying machine (7) is set on the slope bottom moving mechanism (1). The conveying end of the concrete spraying machine (7) is connected to the spraying mechanism (4) through a telescopic hose.

2. The slope concrete spraying equipment according to claim 1, characterized in that: The guiding mechanism (3) includes two connecting parts (301) that are respectively connected to the slope top moving mechanism (2) and the slope bottom moving mechanism (1). Two parallel guide frames (302) are provided between the two connecting parts (301). The guide frame (302) includes a frame body (3020), a working groove (3021) is provided in the frame body (3020), and sliding rods (3022) located on both sides of the working groove (3021) are provided on the frame body (3020).

3. The slope concrete spraying equipment according to claim 2, characterized in that: spraying... The mechanism (4) includes two symmetrically arranged first mounting plates (401). The front end of the first mounting plate (401) is provided with a first sliding sleeve shaft (402) that is slidably fitted outside the slide rod (3022). A mounting frame (403) is provided between the two first mounting plates (401). A spraying head (404) is provided through the mounting frame (403). The concrete spraying machine (7) is connected to the spraying head (404) through a telescopic hose. A first lifting lug (412) is provided on the top of the first mounting plate (401).

4. The slope concrete spraying equipment according to claim 3, characterized in that: Both first mounting plates (401) are provided with rotary bearings (408), and both ends of the mounting bracket (403) are provided with rotary shafts (409) installed in the rotary bearings (408). The ends of the rotary shafts (409) pass through the rotary bearings (408) and are provided with push-pull rods (410) on the outside. The front side of the first sliding sleeve shaft (402) is hinged with a first telescopic cylinder (411), and the telescopic end of the first telescopic cylinder (411) is hinged to the end of the push-pull rod (410).

5. The slope concrete spraying equipment according to claim 4, characterized in that: A connecting frame (405) is provided between the top and bottom of the two first mounting plates (401), and a laser rangefinder (406) and an image acquisition device (407) are provided on the opposite sides of the two connecting frames (405).

6. The slope concrete spraying equipment according to claim 2, characterized in that: The slope bottom moving mechanism (1) includes a bottom moving platform (101), and two sets of first track wheel moving mechanisms (102) are symmetrically arranged at the bottom of the bottom moving platform (101). The slope top moving mechanism (2) includes a top moving platform (201), two sets of second track wheel moving mechanisms (204) are symmetrically arranged at the bottom of the top moving platform (201), and a second linear module (203) is arranged at the top of the top moving platform (201).

7. The slope concrete spraying equipment according to claim 6, characterized in that: The lifting mechanism (6) includes a support column (602) and a winch (601) set at the front and rear on the top moving platform (201). A pulley (603) is set at the top of the support column (602). The wire rope on the winch (601) is wound around the pulley (603) and then connected to the spraying mechanism (4) through a hook.

8. The slope concrete spraying equipment according to claim 7, characterized in that: The bottom moving platform (101) and the top moving platform (201) are respectively provided with hinge seats (103) for connecting the guide mechanism (3). The two connecting parts (301) of the guide mechanism (3) are rotatably connected to the corresponding hinge seats (103) through the rotating shaft (302).

9. The slope concrete spraying equipment according to claim 8, characterized in that: A take-up and release mechanism (8) is provided on the side of the bottom moving platform (101) that is away from the guide mechanism (3). The take-up and release mechanism (8) includes a support frame (801) provided on the top of the bottom moving platform (101). Two rotating shaft seats (802) are symmetrically arranged on the top of the support frame (801). A drive shaft (803) is rotatably arranged between the two rotating shaft seats (802). The two ends of the drive shaft (803) pass through the rotating shaft seats (802) and are connected to a take-up drum (804). A support platform (805) is also provided on the outside of the support frame (801). A drive device (806) is provided on the support platform (805). A transmission assembly (807) is provided between the output shaft of the drive device (806) and the drive shaft (803). Two third lifting lugs (303) are symmetrically arranged on the connecting part (301) at the top. The wire rope wound on the take-up drum (804) is connected to the corresponding third lifting lug (303).

10. The slope concrete spraying equipment according to claim 9, characterized in that: An angle adjustment mechanism (9) is provided between the slope top moving mechanism (2) and the guide frame (302) on both sides. The angle adjustment mechanism (9) includes a support rod (901) provided on the outside of the frame (3020). A fourth telescopic cylinder (902) is hinged on the support rod (901). Extension rods (903) are provided on both sides of the top moving platform (201). The telescopic end of the fourth telescopic cylinder (902) is hinged to the end of the extension rod (903). The wheel body of the second track wheel moving mechanism (204) includes a moving part (2040) that moves on the track, and a support part (2041) that can abut against the side of the track is provided on the side of the moving part near the slope.

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