A material hoist lifting box anti-falling device

Abstract

The present invention relates to a material hoist lifting box anti-falling device, wherein the material hoist includes a vertical outer frame, a lifting box movably arranged in the vertical outer frame, and a safety door rotatably arranged on the vertical outer frame, and the anti-falling device includes an outer frame fixing seat arranged on the column of the vertical outer frame, a bent latch rod rotatably connected to the outer frame fixing seat, and a transmission connecting rod with two ends respectively hinged to the transmission rod and the safety door. Compared with the prior art, the present invention has a simple structure and is easy to operate. Through the linkage between the safety door and the bent latch rod, the anti-falling function is activated at the same time as the safety door is opened, thereby ensuring the safety of the overall equipment; in addition, the present invention has fewer parts, lower production and maintenance costs, and a smaller size, and can be effectively applied to a variety of production environments with narrow spaces, and has a relatively broad application prospect.

Description

Technical Field

[0001] The invention belongs to the technical field of logistics transportation and relates to a device for preventing a lifting box of a material hoist from falling. Background Art

[0002] At present, in the logistics transportation of automobile factories, material hoists are usually used for vertical transportation of automobile parts. However, due to damage or aging of the device, it is easy to cause the lifting material box to fall when the staff are loading and unloading goods due to the breakage of the electric hoist chain or electrical out of control, which poses a major threat to the personal safety of the staff. Conventional material hoists have complex structures and occupy too much space, and the existing anti-fall devices are also large in size, and most of them require energy supply devices such as power or gas sources to maintain their effective working state. This makes the popularity of such anti-fall devices in actual factories low and cannot meet the urgent needs of safe production. Summary of the invention

[0003] The purpose of the present invention is to provide a material hoist lifting box anti-falling device to solve the problem that the existing lifting box anti-falling device is too large in size and too high in cost.

[0004] The purpose of the present invention can be achieved by the following technical solutions:

[0005] A material hoist lifting box anti-falling device, wherein the material hoist comprises a vertical outer frame, a lifting box movably arranged in the vertical outer frame, and a safety door rotatably arranged on the vertical outer frame, and the anti-falling device comprises:

[0006] The outer frame fixing seat is arranged on the column of the vertical outer frame, and the safety door is rotatably connected to the column;

[0007] A bending latch rod, comprising a bending rod, a connecting portion and a transmission rod which are fixedly connected in sequence, wherein the bending latch rod is rotatably connected to an outer frame fixing seat through the connecting portion; and

[0008] The transmission connecting rod has two ends hinged with the transmission rod and the safety door respectively;

[0009] When the safety door is opened outward to an open state, the transmission connecting rod pushes the bent latch rod to rotate around the connecting portion, so that the end of the bent rod is inserted into the frame of the lifting box, thereby preventing the lifting box from falling.

[0010] Furthermore, the bottom surface and both side surfaces of the end of the bending rod are provided with inclined surfaces.

[0011] Furthermore, a buffer pad matched with the end of the bending rod is provided on the bottom surface of the top crossbeam of the lifting material box to prevent a strong impact on the bending rod when the lifting material box falls, thereby causing the bending rod to break and lose its anti-fall function.

[0012] Furthermore, the vertical outer frame is also provided with a support block for supporting the bending rod, and the load-bearing capacity of the bending rod is enhanced by the support block.

[0013] Furthermore, a first mounting plate and a second mounting plate are arranged side by side on the outer frame fixing seat, the connecting portion is arranged between the first mounting plate and the second mounting plate, and is rotationally connected to the outer frame fixing seat by a rotating shaft penetrating the first mounting plate and the second mounting plate.

[0014] Furthermore, a pin is provided between the end of the transmission rod and the end of the transmission connecting rod, and the transmission rod and the transmission connecting rod are hingedly connected through the pin.

[0015] Furthermore, a flanged copper sleeve is provided between the pin shaft and the end of the transmission rod, and between the pin shaft and the end of the transmission connecting rod.

[0016] As a preferred technical solution, the transmission rod is provided with a clearance groove for avoiding interference with the transmission connecting rod.

[0017] Furthermore, the anti-fall device also includes a safety door fixing mechanism for fixing the safety door in an open state, the safety door fixing mechanism including a fixed mounting plate, a safety door clamping plate rotatably arranged on the fixed mounting plate, and a clamping slot opened on the safety door clamping plate and adapted to the thickness of the safety door.

[0018] Furthermore, a fixed limit stopper and a release limit stopper are also provided on the fixed mounting plate, and the safety door clamping plate is rotatably arranged between the fixed limit stopper and the release limit stopper.

[0019] Furthermore, a rotating handle is provided at the outer end of the safety door card plate. By rotating the handle, the safety door card plate is flipped to the fixed limit stopper, and the safety door card is inserted into the card slot and fixed, so that the safety door is maintained in an open state and the bending rod is in an anti-falling state.

[0020] When in use, the safety door is opened normally, and the bending rod is driven to rotate around the connecting part through the transmission connecting rod and the transmission rod in turn, so that the front end of the bending rod is inserted into the frame of the lifting material box, thereby preventing the lifting material box from falling while the safety door remains in the open state.

[0021] Compared with the prior art, the present invention has the following characteristics:

[0022] 1) The present invention has a simple structure and is easy to operate. Through the linkage between the safety door and the bent latch rod, the anti-fall function is activated when the safety door is opened, thereby ensuring the safety of the entire equipment;

[0023] 2) The present invention has fewer parts, lower production and maintenance costs, and a smaller size. It can be effectively applied to a variety of production environments with narrow spaces and has a broader application prospect. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a front view of a material hoist provided with a lifting material box anti-falling device in an embodiment;

[0025] Figure 2 It is a left view of a material hoist provided with a lifting material box anti-falling device in an embodiment;

[0026] Figure 3 A top view of a material hoist provided with a lifting material box anti-falling device in an embodiment;

[0027] Figure 4 for Figure 3 A local enlarged schematic diagram of the middle A;

[0028] Figure 5 is a schematic diagram of the three-dimensional structure of the bent latch rod;

[0029] Figure 6 is a front view of the bent latch rod;

[0030] Figure 7 is a left side view of the bent latch rod;

[0031] Figure 8 It is a schematic diagram of the structure of the bent latch rod when the safety door is open;

[0032] Fig. 9 It is a schematic diagram of the structure of the bent latch rod when the safety door is closed;

[0033] Fig.10 It is a schematic diagram of the assembly structure of the bent latch rod and the safety door fixing mechanism;

[0034] Fig.11 It is a schematic diagram of the assembly structure of the safety door fixing mechanism;

[0035] Fig.12 It is a three-dimensional structural schematic diagram of the safety door fixing mechanism;

[0036] Fig.13 It is the front view of the safety door fixing mechanism;

[0037] Fig.14 It is the left view of the safety door fixing mechanism;

[0038] Fig.15 It is a top view of the safety door fixing mechanism;

[0039] Description of the markings in the figure:

[0040] 1-vertical outer frame, 101-column, 2-lifting material box, 3-safety door, 4-outer frame fixing seat, 5-bending latch rod, 501-bending rod, 502-connecting part, 503-transmission rod, 6-transmission connecting rod, 7-first mounting plate, 8-support block, 9-safety door fixing mechanism, 901-fixed mounting plate, 902-safety door card plate, 903-fixed limit block, 904-release limit block, 905-rotating handle, 10-pin shaft, 11-first mounting plate, 12-second mounting plate, 13-rotating shaft, 14-safety latch. DETAILED DESCRIPTION

[0041] The present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. This embodiment is implemented based on the technical solution of the present invention, and provides a detailed implementation method and specific operation process, but the protection scope of the present invention is not limited to the following embodiments.

[0042] Example

[0043] like Figure 1 and Figure 2 The material hoist shown is used to transport materials from the first floor (0.3 m) to the second floor steel structure platform (5.2 m). The anti-fall device is arranged on the second floor steel platform. Its purpose is to prevent the material hoist from accidentally falling when the operator loads and unloads materials on the second floor steel platform. The material hoist includes a vertical outer frame 1, a lifting material box 2 that is movable in the vertical outer frame 1, and a safety door 3 arranged at the upper and lower parts openings of the vertical outer frame 1. Each door safety door 3 is equipped with a safety latch 14; the anti-fall device includes an outer frame fixing seat 4, a bent latch rod 5, a transmission connecting rod 6, and a safety door fixing mechanism 9 arranged on the fence of the second floor steel platform.

[0044] like Figures 3 to 7 As shown, the bending latch rod 5 comprises a bending rod 501, a connecting portion 502 and a transmission rod 503 which are fixedly connected in sequence, wherein the bottom surface and both side surfaces of the end of the bending rod 501 are provided with inclined surfaces;

[0045] The outer frame fixing seat 4 is arranged on the column 101 of the vertical outer frame 1, and the safety door 3 is rotatably connected to the column 101; the outer frame fixing seat 4 is provided with a first mounting plate 11 and a second mounting plate 12 in parallel, and the connecting portion 502 is arranged between the first mounting plate 11 and the second mounting plate 12, and is rotatably connected to the outer frame fixing seat 4 through a rotating shaft 13 penetrating the first mounting plate 11 and the second mounting plate 12;

[0046] The two ends of the transmission connecting rod 6 are respectively provided with a pin shaft 10, and the transmission rod 503 and the safety door 3 are hinged through the pin shaft 10. A flanging copper sleeve is also provided between the pin shaft 10 and the end of the transmission rod 503, and between the pin shaft 10 and the end of the transmission connecting rod 6; the transmission rod 503 is provided with a clearance groove for avoiding interference with the transmission connecting rod 6;

[0047] like Figures 12 to 15 The safety door fixing mechanism 9 shown includes a fixed mounting plate 901, a fixed limit stop block 903 and a release limit stop block 904 arranged on the fixed mounting plate 901, a safety door clamping plate 902 rotatably arranged on the fixed mounting plate 901 between the fixed limit stop block 903 and the release limit stop block 904, a card slot opened on the safety door clamping plate 902 and adapted to the thickness of the safety door 3, and a rotating handle 905 arranged on the outer end of the safety door clamping plate 902; by rotating the handle 905, the safety door clamping plate 902 is flipped to the fixed limit stop block 903, and the safety door 3 is clamped into the card slot and fixed, so that the safety door 3 is maintained in an open state, and the bending rod 501 is in an anti-fall state.

[0048] In addition, a buffer pad 7 is provided on the bottom surface of the top crossbeam of the lifting material box 2, which is matched with the end of the bending rod 501, so as to prevent the bending rod 501 from being strongly impacted when the lifting material box 2 falls, thereby causing the bending rod 501 to break and lose the anti-falling function. A support block 8 for supporting the bending rod 501 is also provided on the vertical outer frame 1, and the support block 8 enhances the load-bearing capacity of the bending rod 501.

[0049] During operation, the safety door 3 cannot be opened when the lifting material box 2 moves up and down. When the lifting material box 2 is lifted to the second-floor steel structure platform, the electric hoist is controlled to stop working by the induction switch there, and the staff opens the safety door 3. Since the anti-fall device is connected to the safety door 3 on one side, when the safety door 3 rotates 90° to approach the platform fence, the bending rod 501 rotates 90° to the support block 8 and is located below the top beam of the lifting material box 2 (such as Figures 8 to 11 As shown), the safety door 3 is then fixed by operating the safety door clamp 902 to prevent it from rotating, thereby the anti-falling device linked to the safety door 3 enters the anti-falling working state, and the operator can start loading and unloading materials.

[0050] The above description of the embodiments is to facilitate the understanding and use of the invention by those skilled in the art. It is obvious that those skilled in the art can easily make various modifications to these embodiments and apply the general principles described herein to other embodiments without creative work. Therefore, the present invention is not limited to the above embodiments, and improvements and modifications made by those skilled in the art based on the disclosure of the present invention without departing from the scope of the present invention should be within the scope of protection of the present invention.

Claims

1. A device for preventing a lifting material box of a material hoist from falling, the material hoist comprising a vertical outer frame (1), a lifting material box (2) movably arranged in the vertical outer frame (1), and a safety door (3) rotatably arranged on the vertical outer frame (1), characterized in that: The fall prevention device comprises: An outer frame fixing seat (4) is arranged on the outside of a column (101) of the vertical outer frame (1), and the safety door (3) is rotatably connected to the column (101); A bent latch rod (5), comprising a bent rod (501), a connecting portion (502) and a transmission rod (503) which are fixedly connected in sequence, wherein the bent latch rod (5) is rotatably connected to an outer frame fixing seat (4) via the connecting portion (502); and A transmission connecting rod (6), the two ends of which are respectively hinged to the transmission rod (503) and the safety door (3); The bending rod (501) is bent from the outside of the column (101) toward the lifting box (2), so that when the safety door (3) is opened outward to an open state, the transmission connecting rod (6) pushes the bending latch rod (5) to rotate around the connecting portion (502), so that the end of the bending rod (501) passes through the vertical outer frame (1) from the outside and is inserted into the frame of the lifting box (2), thereby preventing the lifting box from falling.

2. The anti-falling device for lifting material box of a material hoist according to claim 1 is characterized in that: The bottom surface and both side surfaces of the end of the bending rod (501) are provided with inclined surfaces.

3. The anti-falling device for lifting material box of a material hoist according to claim 1 is characterized in that: The bottom surface of the top crossbeam of the lifting material box (2) is provided with a buffer pad (7) that matches the end of the bending rod (501).

4. The anti-falling device for lifting material box of a material hoist according to claim 1, characterized in that: The vertical outer frame (1) is also provided with a support block (8) for supporting the bending rod (501).

5. The anti-falling device for lifting material box of a material hoist according to claim 1, characterized in that: A first mounting plate (11) and a second mounting plate (12) are arranged side by side on the outer frame fixing seat (4); the connecting portion (502) is arranged between the first mounting plate (11) and the second mounting plate (12), and is rotatably connected to the outer frame fixing seat (4) via a rotating shaft (13) penetrating the first mounting plate (11) and the second mounting plate (12).

6. The anti-falling device for lifting material box of a material hoist according to claim 1, characterized in that: A pin shaft (10) is provided between the end of the transmission rod (503) and the end of the transmission connecting rod (6), and the transmission rod (503) and the transmission connecting rod (6) are hingedly connected via the pin shaft (10).

7. The anti-falling device for lifting material box of a material hoist according to claim 6, characterized in that: Flanged copper sleeves are also provided between the pin shaft (10) and the end of the transmission rod (503), and between the pin shaft (10) and the end of the transmission connecting rod (6).

8. The anti-falling device for lifting material box of a material hoist according to claim 1, characterized in that: The anti-fall device further comprises a safety door fixing mechanism (9) for fixing the safety door (3) in an open state, the safety door fixing mechanism (9) comprising a fixed mounting plate (901), a safety door clamping plate (902) rotatably disposed on the fixed mounting plate (901), and a clamping groove formed on the safety door clamping plate (902) and adapted to the thickness of the safety door (3).

9. The anti-falling device for lifting material box of a material hoist according to claim 8, characterized in that: The fixed installation plate (901) is also provided with a fixed limit stopper (903) and a release limit stopper (904), and the safety door clamping plate (902) is rotatably arranged between the fixed limit stopper (903) and the release limit stopper (904).

10. The anti-falling device for lifting material box of a material hoist according to claim 8, characterized in that: The outer end of the safety door card plate (902) is also provided with a rotating handle (905).

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