Self-locking type carrying device for concrete prefabricated guardrail

Abstract

The utility model belongs to the field of concrete prefabricated guardrail carrying clamps, and particularly relates to a concrete prefabricated guardrail self-locking type carrying device which comprises a frame body, a cross beam and a fork knife sleeve are arranged on the frame body, a hinged support is fixedly connected to the cross beam, an upper pin shaft penetrating through a body of the hinged support is fixedly connected to the hinged support, and two connecting arms are rotationally connected to the upper pin shaft. Clamping arms are hinged to the two connecting arms, clamping jaws are connected to the lower ends of the two clamping arms, the middles of the two clamping arms are hinged through a lower pin shaft, one end of the lower pin shaft is fixedly connected with a guide rod, the upper end of the guide rod penetrates through the upper pin shaft and is in sliding fit with the upper pin shaft, the lower end of the guide rod is fixedly connected with an abutting plate, and one end of the lower pin shaft is fixedly connected with a guide sleeve. A hooking box is connected to the guide sleeve, a hooking opening is formed in the top of the hooking box, an opening and closing device is fixedly connected to the upper pin shaft, and a hook correspondingly matched with the hooking opening is fixedly connected to a mandrel of the opening and closing device. According to the utility model, not only is the labor intensity of workers reduced, but also the operation efficiency of guardrail carrying is improved.

Description

Technical Field

[0001] The utility model relates to a self-locking transport device for a prefabricated concrete guardrail, belonging to the field of transport clamps for prefabricated concrete guardrails. Background Art

[0002] Road guardrails play a very important role in urban road construction. Their main functions are: maintaining traffic order, ensuring the safety of drivers and pedestrians, and preventing and reducing traffic accidents. Concrete guardrails are a type of road guardrails, which are prefabricated by pouring concrete into a mold truck and then maintaining it. In traditional technology, after the production of prefabricated concrete guardrails is completed, two workers usually lift the guardrails onto a flatbed truck, and then transfer them via the flatbed truck, which is labor-intensive for the workers.

[0003] To this end, the Chinese utility model patent with the authorization announcement number CN218173813U discloses a guardrail handling fixture, which can be used with a forklift to replace manual handling of the guardrail to reduce the labor intensity of workers. However, during use, the worker needs to manually rotate the latch to make the latch engage or disengage from the latch on the guide rod, which not only wastes manpower but also reduces work efficiency. Utility Model Content

[0004] In view of the above deficiencies in the prior art, the technical problem to be solved by the utility model is to provide a self-locking transport device for prefabricated concrete guardrails which can save manpower and improve work efficiency.

[0005] The cam is connected with the two guide wheels, and the two guide wheels are connected with the two guide wheels at the lower ends thereof of the support rod, and the two guide wheels are connected with the two guide wheels at the lower ends thereof of the support rod.

[0006] Furthermore, there are two self-locking clamping jaw assemblies, which are respectively arranged at two ends of the crossbeam.

[0007] Furthermore, a guide shaft is slidably connected in the guide sleeve, the hook box is fixedly connected to the guide shaft, and a spring is sleeved on the guide shaft and located between the guide sleeve and the hook box.

[0008] Further, a protective pad is fixedly connected to the bottom of the backing plate.

[0009] Further, the clamping jaw is hinged on the clamping arm, and a clamping jaw limiting component is connected between the clamping jaw and the clamping arm.

[0010] Further, the clamping jaw limiting component is a tension spring hooked between the clamping jaw and the clamping arm.

[0011] Working principle and process:

[0012] During use, this device is installed on the forklift's fork blade through the fork blade sleeve. Initially, the hook is hooked in the hook box. At this time, the distance between the upper pin shaft and the lower pin shaft is relatively small, and the two clamping jaws are in an open state. The device is moved above the precast concrete guardrail by the forklift's movement, aligning the backing plate with the top of the guardrail. Then, the device is moved downward by the downward movement of the fork blade, causing the backing plate to fit against the top of the guardrail. Then, continue to press down. Due to the positioning of the backing plate, the upper pin shaft will move downward along the guide rod, thereby pressing the opener under the pressure of the hook and the bottom plate of the hook box, causing the core shaft of the opener to rotate by a certain degree, and then driving the hook to rotate by a certain degree. Then, raise the fork blade, driving the crossbeam to rise. The upper pin shaft will first rise along with the crossbeam, causing the hook to disengage from the bottom plate of the hook box. At this time, the core shaft of the opener will continue to rotate by a certain degree, driving the hook to continue to rotate by a certain degree, making its direction consistent with the direction of the hook opening. Then, continue to raise the fork blade. Since the limit between the upper pin shaft and the lower pin shaft is cancelled, as the distance between the upper pin shaft and the lower pin shaft increases, the lower ends of the two clamping arms gradually close, causing the two clamping jaws to clamp the guardrail, thereby lifting the guardrail; after reaching the transfer position, place the guardrail on the ground. When the fork blade descends, it will drive the backing plate to rest against the top of the guardrail again. At this time, the hook will be inserted into the hook box again. Then, continue to lower the fork blade. Similarly, the opener will be pressed down and released again, causing the core shaft to drive the hook to rotate by a certain degree. At this time, the hook is perpendicular to the hook opening, and the hook is re-hooked in the hook box, completing the limit of the upper pin shaft and the lower pin shaft. At this time, the two clamping jaws are in an open state, so this device can be smoothly removed and wait for the next grasping.

[0013] The beneficial effects of the present utility model compared with the prior art are:

[0014] The self-locking handling device for precast concrete guardrails of the present utility model can complete the handling operation of the guardrail without manual assistance from workers, not only reducing the labor intensity of workers but also improving the operation efficiency of guardrail handling. Brief description of the drawings

[0015] Figure 1 is a three-dimensional structural schematic diagram of the present utility model;

[0016] Figure 2 isFigure 1 Enlarged view at A in the figure;

[0017] Figure 3 It is the left view of the present utility model.

[0018] In the figure: 1, frame body; 2, cross beam; 3, fork knife sleeve; 4, hinge seat; 5, upper pin shaft; 6, connecting arm; 7, guide rod; 8, lower pin shaft; 9, pressing plate; 10, protective pad; 11, clamping arm; 12, jaw; 13, tension spring; 14, opener; 15, mandrel; 16, hook; 17, hook box; 18, guide sleeve; 19, guide shaft; 20, spring; 21, hook opening. Specific embodiments

[0019] The following further describes the embodiments of the present utility model with reference to the accompanying drawings:

[0020] Embodiment 1:

[0021] As Figures 1 to 3 shown, the self-locking handling device for precast concrete guardrails of the present utility model includes a frame body 1, a cross beam 2 and a fork knife sleeve 3 are arranged on the frame body 1, at least one self-locking jaw assembly is fixedly connected to the cross beam 2, the self-locking jaw assembly further includes a hinge seat 4, the hinge seat 4 is fixedly connected to the cross beam 2, an upper pin shaft 5 penetrating through its body is fixedly connected to the hinge seat 4, two connecting arms 6 are rotatably connected to the upper pin shaft 5, clamping arms 11 are hinged to both connecting arms 6, jaws 12 are connected to the lower ends of both clamping arms 11, the middle parts of both clamping arms 11 are hinged by a lower pin shaft 8, one end of the lower pin shaft 8 is fixedly connected to a guide rod 7, the upper end of the guide rod 7 penetrates through the upper pin shaft 5 and is in sliding fit with the upper pin shaft 5, the lower end of the guide rod 7 is fixedly connected to a pressing plate 9, one end of the lower pin shaft 8 is fixedly connected to a guide sleeve 18, a hook box 17 is connected to the guide sleeve 18, a hook opening 21 is arranged at the top of the hook box 17, an opener 14 is fixedly connected to the upper pin shaft 5, and a hook 16 corresponding and adapted to the hook opening 21 is fixedly connected to the mandrel 15 of the opener 14.

[0022] During use, the device is installed on the forklift's fork blade through the fork blade sleeve 3. At the start, the hook 16 is hooked inside the hook box 17. At this time, the distance between the upper pin shaft 5 and the lower pin shaft 8 is small, and the two clamping jaws 12 are in an open state. The device is moved above the precast concrete guardrail by the forklift's action, making the abutting plate 9 correspond to the top of the guardrail. Then, the device is moved downward by the downward movement of the fork blade, causing the abutting plate 9 to fit against the top of the guardrail. Then, continue to press down. Due to the positioning of the abutting plate 9, the upper pin shaft 5 will move downward along the guide rod 7, thereby pressing the opener 14 under the pressure of the hook 16 and the bottom plate of the hook box 17, causing the core shaft 15 of the opener 14 to rotate 45 degrees, and then driving the hook 16 to rotate 45 degrees. Then, raise the fork blade, driving the cross beam 2 to rise. The upper pin shaft 5 will first rise along with the cross beam 2, causing the hook 16 to disengage from the bottom plate of the hook box 17. At this time, the core shaft 15 of the opener 14 will continue to rotate 45 degrees, driving the hook 16 to continue to rotate 45 degrees, making its orientation consistent with the orientation of the hook opening 21. Then, continue to raise the fork blade. Since the limit between the upper pin shaft 5 and the lower pin shaft 8 is cancelled, as the distance between the upper pin shaft 5 and the lower pin shaft 8 increases, the lower ends of the two clamping arms 11 gradually close, causing the two clamping jaws 12 to clamp the guardrail, thereby lifting the guardrail; After reaching the transfer position, place the guardrail on the ground. When the fork blade descends, it will drive the abutting plate 9 to rest against the top of the guardrail again. At this time, the hook 16 will be inserted into the hook box 17 again. Then, continue to lower the fork blade. Similarly, the opener 14 will be pressed down and released again, causing the core shaft 15 to drive the hook 16 to rotate 90 degrees. At this time, the hook 16 is perpendicular to the hook opening 21, and the hook 16 is re-hooked inside the hook box 17, completing the limit for the upper pin shaft 5 and the lower pin shaft 8. At this time, the two clamping jaws 12 are in an open state, so the device can be smoothly removed and wait for the next grasping.

[0023] The self-locking handling device for precast concrete guardrails of the present utility model can complete the handling operation of the guardrails without manual assistance from workers, which not only reduces the labor intensity of workers but also improves the operation efficiency of guardrail handling.

[0024] Embodiment 2:

[0025] As Figures 1 to 3 shown, on the basis of Embodiment 1,

[0026] Furthermore, the number of the self-locking jaw assemblies is two, and the two self-locking jaw assemblies are respectively arranged at both ends of the cross beam 2. The two self-locking jaw assemblies can simultaneously grasp both ends of the guardrail, so the grasping stability of the guardrail is better;

[0027] Further, a guide shaft 19 is slidably connected inside the guide sleeve 18. The hook box 17 is fixedly connected to the guide shaft 19. A spring 20 is sleeved on the guide shaft 19 between the guide sleeve 18 and the hook box 17. When the hook 16 abuts against the bottom plate of the hook box 17, the hook box 17 can move downward under the action of the spring 20, so as to buffer and protect the switch 14.

[0028] Further, a protective pad 10 is fixedly connected to the bottom of the abutting plate 9, and the protective pad 10 plays a role in protecting the guardrail.

[0029] Further, the clamping jaw 12 is hinged to the clamping arm 11, and a clamping jaw limiting component is connected between the clamping jaw 12 and the clamping arm 11. In order to adapt to guardrails of more specifications, considering that the clamping surfaces of some guardrails are not necessarily two parallel surfaces, the clamping jaw 12 is hinged to the clamping arm 11 to adapt to the grasping of guardrails with different specifications and irregular clamping surfaces; the clamping jaw limiting component is provided to prevent the clamping jaw 12 from swinging randomly to the horizontal state so that the guardrail cannot be clamped; the clamping plate cooperating with the guardrail at the bottom is designed from a fixed type to an adjustable structure, and the two side clamping plates are pulled by an adjusting spring to prevent them from rotating around the hinge shaft.

[0030] Further, the clamping jaw limiting component is a tension spring 13 hooked between the clamping jaw 12 and the clamping arm 11. The upper end of the clamping jaw 12 is pulled by the tension spring 13, so as to ensure the vertical state of the clamping jaw 12 and ensure the clamping stability of the guardrail.

[0031] It should be specifically noted that: in the description of the present invention, the orientation or positional relationship indicated by terms such as "upper" and "lower" is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention, rather than requiring the present invention to be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention.

Claims

1. A self-locking handling device for precast concrete guardrails, characterized in that: It includes a frame body (1), on which a cross beam (2) and a fork knife sleeve (3) are provided. At least one self-locking jaw assembly is fixedly connected to the cross beam (2). The self-locking jaw assembly further includes a hinge seat (4) fixedly connected to the cross beam (2). A top pin shaft (5) passing through its body is fixedly connected to the hinge seat (4). Two connecting arms (6) are rotatably connected to the top pin shaft (5). Clamping arms (11) are hinged to both connecting arms (6). Claws (12) are connected to the lower ends of both clamping arms (11). The middle parts of the two clamping arms (11) are hinged by a bottom pin shaft (8). One end of the bottom pin shaft (8) is fixedly connected to a guide rod (7). The upper end of the guide rod (7) passes through the top pin shaft (5) and is in sliding fit with the top pin shaft (5). The lower end of the guide rod (7) is fixedly connected to a pressing plate (9). One end of the bottom pin shaft (8) is fixedly connected to a guide sleeve (18). A hook box (17) is connected to the guide sleeve (18). A hook opening (21) is provided at the top of the hook box (17). An opener (14) is fixedly connected to the top pin shaft (5). A hook (16) corresponding to and adapted to the hook opening (21) is fixedly connected to the core shaft (15) of the opener (14).

2. The self-locking handling device for precast concrete guardrails according to claim 1, wherein: The number of the self-locking jaw assemblies is two, and the two self-locking jaw assemblies are respectively arranged at both ends of the cross beam (2).

3. The self-locking handling device for precast concrete guardrails according to claim 1, wherein: A guide shaft (19) is slidably connected in the guide sleeve (18). The hook box (17) is fixedly connected to the guide shaft (19). A spring (20) is sleeved on the guide shaft (19) between the guide sleeve (18) and the hook box (17).

4. The self-locking handling device for precast concrete guardrails according to claim 1, wherein: A protective pad (10) is fixedly connected to the bottom of the pressing plate (9).

5. The self-locking handling device for precast concrete guardrails according to any one of claims 1 to 4, characterized in that: The claw (12) is hinged to the clamping arm (11), and a claw limiting component is connected between the claw (12) and the clamping arm (11).

6. The self-locking handling device for precast concrete guardrails according to claim 5, wherein: The claw limiting component is a tension spring (13) hooked between the claw (12) and the clamping arm (11).

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