Safety supporting device for lifting platform

Abstract

According to one embodiment of the invention, the safety supporting device for the lifting platform is provided. The lifting platform safety support device according to one embodiment of the present invention comprises: a fixed plate provided on a support structure for lifting a lifting platform; a pair of fixing pieces protruding side by side from the fixing plate to the lifting platform; a platform stopper disposed between the fixing pieces and rotatably coupled to the fixing pieces, one end of the platform stopper extending toward the lifting platform to form a support portion supporting the lifting platform, and the other end of the platform stopper contacting the fixing plate to form a rotation restricting portion restricting downward rotation of the support portion; a pair of lever fixing pieces formed by protruding from the fixing plate or the fixing pieces; one end of the operating rod is in contact with the lifting platform to form a force bearing point for bearing force, the other end of the operating rod is connected with the supporting part of the platform retainer to form an action point for pulling the platform retainer, and the force bearing point and the action point are rotatably combined to the lever fixing piece; and a torsion spring that is interposed between the lever fixing piece and the operating lever and that maintains the posture of the operating lever.

Description

Technical Field

[0001] The present invention relates to a safety support device for a lifting platform, and more particularly, to a safety support device for a lifting platform that can automatically move without the help of workers or machines and can safely support a lifting platform used for loading vehicles, logistics, etc. to a predetermined position. Background Art

[0002] Generally, ships for transporting vehicles, such as roll-on roll-off vessels and pure car carriers, install separate lifting devices in the loading space and perform multi-stage loading to load more vehicles in a limited space. More specifically, columns extending in the vertical direction are installed at each corner inside the loading space, and a plurality of support devices are provided at intervals along the length direction of each column. The lifting platform for loading vehicles is lifted and lowered using the lifting device, and the vehicles are placed on the support devices to achieve multi-stage loading. The support device usually consists of a bracket coupled to the column, a stopper rotatably coupled to the bracket, and a wire for rotating or fixing the stopper.

[0003] Conventionally, when the lifting platform needs to be placed at a required position on the support device, the lifting platform is raised from the lowest level and the stopper is pushed upward. When the lifting platform completely passes over the stopper and the stopper returns to its original position by gravity, the lifting platform is lowered and placed on the upper end of the stopper. Conversely, when the lifting platform needs to be lowered to the lowest level, workers directly or use a machine to pull the wire connected to the stopper and then lower the lifting platform, where the stopper contacts the column. In this way, in the past, the lifting platform could only be lowered by pulling the wire connected to the stopper, which was not only troublesome but also required a lot of time and labor, reducing work efficiency. In addition, if the stopper remains in the same position for a long time, there is a high risk of accidents due to rust causing operation problems or wire breakage.

[0004] Therefore, there is a need for a safety support device for a lifting platform that can automatically move without the help of workers or machines, can support the lifting platform to a predetermined position or lower it to the lowest level, and can reduce safety accidents that may occur due to corrosion during long-term use at sea.

[0005] Prior Art Documents

[0006] Patent Document: Korean Invention Patent Publication No. 10-1249073 (March 25, 2013)

[0007] Summary of the Invention

[0008] Technical Problem to be Solved by the Invention

[0009] One technical problem to be solved by some embodiments of the present invention is to provide a lifting platform safety support device that can automatically move without the help of workers or machines and can safely support the lifting platform used for loading vehicles, logistics, etc. to a predetermined position.

[0010] The technical problems to be solved by the present invention are not limited to the above technical problems, and those skilled in the art will clearly understand other technical problems not mentioned from the following description.

[0011] Technical solutions for solving the problems

[0012] The lifting platform safety support device according to an embodiment of the present invention for solving the above technical problems includes: a fixing plate provided on a support structure for lifting the lifting platform; a pair of fixing pieces protruding side by side from the fixing plate towards the lifting platform; a platform stopper provided between the fixing pieces and rotatably coupled to the fixing pieces, one end extending towards the lifting platform to form a support portion for supporting the lifting platform, and the other end contacting the fixing plate to form a rotation limiting portion for limiting the downward rotation of the support portion; a pair of lever fixing pieces protruding from the fixing plate or the fixing pieces; an operating rod, one end contacting the lifting platform to form a force receiving point for receiving a force, and the other end connected to the support portion of the platform stopper to form an acting point for pulling the platform stopper, rotatably coupled between the force receiving point and the acting point to the lever fixing pieces; and a torsion spring interposed between the lever fixing pieces and the operating rod for maintaining the posture of the operating rod.

[0013] The lifting platform safety support device further includes: a tension spring for connecting between the support portion of the platform stopper and the acting point of the operating rod.

[0014] In the platform stopper, when no force is transmitted to the force receiving point, the support portion can rotate by its own weight, so that the rotation limiting portion is supported by the fixing plate, and the posture of the operating rod can be maintained at a position where the forces of the tension spring and the torsion spring cancel each other out.

[0015] The operating rod includes: a pair of parallel arranged rods; a first link for connecting between the rods at the force receiving point; and a second link for connecting between the rods at the acting point, and one end of the tension spring is fixed to the second link.

[0016] The distance between the rods of the operating rod can be greater than the thickness of the platform stopper, so that when the force receiving point descends with the lifting platform, the platform stopper rotates and is inserted between the rods, and the first link rotates to the outside of the platform stopper.

[0017] The tension spring can be composed of a pair, respectively connecting the two side surfaces of the platform stopper and the second link.

[0018] The lifting platform safety support device further includes a linking part, and the linking part includes: a first link, one end of which is hinged to the support part of the platform stopper; and a second link, one end of which is hinged to the other end of the first link, and the other end of which is hinged to the acting point of the operating rod.

[0019] Effects of the Invention

[0020] According to the present invention, one end of the operating rod contacts the lifting platform to form a force-receiving point for receiving force, and the other end of the operating rod is connected to the support part of the platform stopper rotatably combined between a pair of fixed pieces to form an acting point for pulling the platform stopper. The force-receiving point and the acting point of the operating rod are rotatably combined between a pair of lever fixed pieces, so that it can move automatically without the help of workers or machines, and the lifting platform can be supported to a predetermined position or lowered to the lowest layer.

[0021] In particular, when the lifting platform rises and completely pushes up the platform stopper, the platform stopper unfolds by its own weight, and the tension spring pushes the platform stopper to completely unfold, so that even if the rotating shaft of the platform stopper is corroded, the platform stopper can be easily unfolded.

[0022] Moreover, the distance between a pair of rods forming the operating rod is greater than the thickness of the platform stopper. Thus, when the force-receiving point of the operating rod descends from the lifting platform, the platform stopper rotates and is inserted between the rods, and the first link rotates to the outside of the platform stopper, so as to prevent the platform stopper from unfolding in the case of damage to the tension spring or the linking part, and to prevent safety accidents caused by the dropping of the lifting platform. Description of the Drawings

[0023] Figure 1 It is a usage state diagram of a lifting platform safety support device according to an embodiment of the present invention.

[0024] Figure 2 It is Figure 1 a perspective view of the lifting platform safety support device.

[0025] Figure 3 It is a side view of the lifting platform safety support device.

[0026] Figure 4 It is a schematic diagram showing that the platform stopper is stuck on the first link in the case of damage to the tension spring.

[0027] Figure 5 It is a side view of a lifting platform safety support device according to another embodiment of the present invention.

[0028] Figure 6 and Figure 7 is an operation diagram for explaining the operation of the safety support device of the lifting platform.

[0029] Explanation of reference numerals

[0030] 1: Safety support device of the lifting platform

[0031] 10: Fixed plate 20: Fixed piece

[0032] 30: Platform stopper 31: Support part

[0033] 32: Rotation limiting part 40: Lever fixed piece

[0034] 50: Operating rod 50a: Force application point

[0035] 50b: Acting point 51: Rod member

[0036] 52: First connecting rod 53: Second connecting rod

[0037] 60: Torsion spring 70: Tension spring

[0038] 80: Link part 80a: First link

[0039] 80b: Second link

[0040] D: Lifting platform S: Support structure Detailed implementation manners

[0041] Through the embodiments described in detail below in conjunction with the drawings, the advantages and features of the present invention and the methods for realizing them will become clear. However, the present invention is not limited to the embodiments disclosed below and can be implemented in various different forms. The following embodiments are provided only to complete the disclosure of the present invention and enable those of ordinary skill in the art to which the present invention pertains to fully understand the scope of the present invention. The present invention is only defined by the scope of the claims. Throughout the specification, the same reference signs indicate the same components.

[0042] Hereinafter, with reference to Figures 1 to 7 , the safety support device 1 of the lifting platform according to an embodiment of the present invention will be described in detail.

[0043] Figure 1 is a usage state diagram of the safety support device of the lifting platform according to an embodiment of the present invention.

[0044] The lifting platform safety support device 1 of the present invention can be composed of at least four units inside the support structure S and arranged on the same horizontal plane. Each unit expands outward to fix the lifting platform D that lifts inside the support structure S at a predetermined position or retracts inward to open the passage, so that the lifting platform D can be lifted and lowered conveniently. Such a lifting platform safety support device 1 can be applied to ships for transporting vehicles, such as ro-ro ships, car carriers, etc.

[0045] One end of the operating rod (refer to Figure 2 50) of the lifting platform safety support device 1 contacts the lifting platform D to form a force-receiving point for receiving force (refer to Figure 3 50a), and the other end of the operating rod 50 is connected to the support portion (refer to Figure 2 31) of the platform stopper (refer to Figure 2 30) that is rotatably coupled between a pair of fixed pieces (refer to Figure 2 20) to form an action point for pulling the platform stopper 30 (refer to Figure 3 50b). The force-receiving point 50a and the action point 50b of the operating rod 50 are rotatably coupled between a pair of lever fixed pieces (refer to Figure 2 40), so that it can move automatically without the help of workers or machines and can support the lifting platform to a predetermined position or lower it to the lowest level. In particular, when the lifting platform D rises and completely pushes up the platform stopper 30, the platform stopper 30 descends by its own weight, and the tension spring (refer to Figure 2 70) pushes the platform stopper 30 to fully expand, so that even if the rotating shaft of the platform stopper 30 is corroded, the platform stopper 30 can be easily expanded. And, the distance between a pair of rods (refer to Figure 2 51) constituting the operating rod 50 is greater than the thickness of the platform stopper 30. Thus, when the force-receiving point 50a of the operating rod 50 descends by the lifting platform D, the platform stopper 30 rotates and inserts between the rods 51, and the first link (refer to Figure 2 52) rotates to the outside of the platform stopper 30, so as to prevent the platform stopper 30 from expanding in the case of damage to the tension spring 70 or the link portion (refer to Figure 4 80), and prevent safety accidents caused by the dropping of the lifting platform D.

[0046] Hereinafter, with reference to Figures 2 to 5 , the lifting platform safety support device 1 will be described in detail.

[0047] Figure 2 For Figure 1 is a perspective view of the lifting platform safety support device, Figure 3 is a side view of the lifting platform safety support device, Figure 4Schematic diagram showing the platform stopper stuck to the first link in case of damage to the tension spring Figure 5 Side view of a lifting platform safety support device according to another embodiment of the present invention. The lifting platform safety support device 1 of the present invention includes a fixing plate 10, a pair of fixing pieces 20, a platform stopper 30, a pair of lever fixing pieces 40, an operating rod 50, and a torsion spring 60.

[0048] The fixing plate 10 is a plate-like member having a certain thickness and can be provided on a support structure S for lifting and lowering a lifting platform D. More specifically, one side surface of the fixing plate 10 is in close contact with the inner side surface of the support structure S in the vertical direction and is fixed to the support structure S by welding, screw connection, or concavo-convex combination. In the drawings, the fixing plate 10 is shown as a quadrilateral plate member, but is not limited thereto, and the shape of the fixing plate 10 can be modified in various ways. The other side surface of the fixing plate 10 is combined with a pair of fixing pieces 20.

[0049] The fixing piece 20 rotatably supports the platform stopper 30 described later, and a pair of fixing pieces 20 can project side by side from the fixing plate 10 toward the lifting platform D. The pair of fixing pieces 20 are spaced apart from each other and project side by side in the vertical direction from the fixing plate 10, and the platform stopper 30 is provided between the pair of fixing pieces 20.

[0050] The platform stopper 30 expands toward the lifting platform D to support the lower surface of the lifting platform D, or folds toward the support structure S to facilitate the lifting and lowering of the lifting platform D, and is rotatably coupled to the fixing piece 20. One end of the platform stopper 30 can extend along the lifting platform D to form a support portion 31 for supporting the lifting platform D, and the other end contacts the fixing plate 10 to form a rotation limiting portion 32 for restricting the downward rotation of the support portion 31. The platform stopper 30 can be arranged such that when it expands toward the lifting platform D, the support portion 31 is horizontally arranged and the rotation limiting portion 32 is vertically arranged and contacts the fixing plate 10, and when it folds toward the support structure S, the surface connecting the support portion 31 and the rotation limiting portion 32 is arranged vertically inside the fixing piece 20, contacts the fixing plate 10, and the rotation limiting portion 32 is inclined downward away from the fixing plate 10.

[0051] A pair of lever fixing pieces 40 are formed to protrude from the fixing plate 10 or the fixing piece 20. The lever fixing pieces 40 rotatably support an operating lever 50 described later, and the pair of lever fixing pieces 40 may protrude upward and obliquely from the fixing plate 10 or the fixing piece 20. Hereinafter, the structure in which the lever fixing pieces 40 protrude from the fixing piece 20 will be described in detail. The pair of lever fixing pieces 40 may protrude upward and obliquely from the pair of fixing pieces 20 and extend side by side. In a conventional support device, the lever fixing piece 40 that rotatably supports the operating lever 50 and the fixing piece 20 that rotatably supports the platform stopper 30 are not an integral structure but are separated from each other, so the installation is troublesome and occupies a large installation space. In the present invention, the lever fixing pieces 40 protrude from the fixing plate 10 or the fixing piece 20, which is not only convenient for installation but also occupies a relatively small installation space and has high usability. On the other hand, for the sake of convenience of explanation, the lever fixing pieces 40 and the fixing piece 20 are described separately, but the lever fixing pieces 40 and the fixing piece 20 may also be an integral structure. And, in the drawings, the lever fixing pieces 40 are shown as triangular plate members, but are not limited thereto, and the shape of the lever fixing pieces 40 can be modified in various ways.

[0052] The operating lever 50 is used to drive the platform stopper 30 to rotate. One end thereof contacts the lifting platform D to form a force receiving point 50a for receiving force, and the other end is connected to the support portion 31 of the platform stopper 30 to form an acting point 50b for pulling the platform stopper 30. The force receiving point 50a and the acting point 50b are rotatably coupled to the lever fixing piece 40 therebetween. The other end of the operating lever 50 may be connected to the support portion 31 of the platform stopper 30 through a tension spring 70 described later, as Figure 2 and Figure 3 shown, or may be connected to the support portion 31 of the platform stopper 30 through a link portion 80, as Figure 5 shown. The structure of the operating lever 50 will be described in more detail later.

[0053] The torsion spring 60 may be interposed between the lever fixing piece 40 and the operating lever 50. The torsion spring 60 is used to maintain the posture of the operating lever 50. More specifically, the posture of the operating lever 50 can be maintained in a basic state in which the platform stopper 30 is unfolded toward the lifting platform D. A pair of torsion springs 60 may be respectively interposed between the lever fixing piece 40 and the operating lever 50 to keep both sides of the operating lever 50 balanced and maintain the posture. Since the torsion spring 60 is interposed between the lever fixing piece 40 and the operating lever 50, when no force is transmitted to the force receiving point 50a of the operating lever 50, the support portion 31 in the platform stopper 30 rotates by its own weight, so that the rotation restricting portion 32 is supported by the fixing plate 10, and the posture of the operating lever 50 is maintained at a position where the force of the torsion spring 60 and the force of the tension spring 70 or the link portion 80 are offset.

[0054] Refer to Figure 2 andFigure 3 , the operating lever 50 includes: a pair of parallel arranged rods 51; a first connecting rod 52 for connecting between the rods 51 at the force application point 50a; and a second connecting rod 53 for connecting between the rods 51 at the acting point 50b. At this time, the distance between the pair of rods 51 can be greater than the thickness of the platform stopper 30. By making the distance between the pair of rods 51 greater than the thickness of the platform stopper 30, when the force application point 50a of the operating lever 50 descends from the lifting platform D, the platform stopper 30 can rotate and insert between the rods 51, and the first connecting rod 52 rotates to the outside of the platform stopper 30. When the first connecting rod 52 rotates to the outside of the platform stopper 30, if the tension spring 70 or the connecting portion 80 is suddenly damaged, as Figure 4 shown, the first connecting rod 52 supports the platform stopper 30 to prevent the platform stopper 30 from unfolding, thereby being able to prevent safety accidents caused by the dropping of the lifting platform D. The lifting platform D is usually set by large and heavy structures. For example, when installed on a ship of a transport vehicle, it can be set by a large structure to support multiple vehicles. In this case, if an accident occurs during operation, the consequences are very fatal, so it is necessary to have a structure that can minimize malfunctions during the operation of the platform stopper 30 or a structure that will not cause a major accident even if one malfunction occurs. The supporting device of the present invention can be composed of at least four as a unit and set on the same horizontal plane to support the lifting platform D simultaneously. Therefore, when any one of the platform stoppers 30 unfolds, the lifting platform D may drop due to imbalance on both sides. To prevent this problem in advance, the distance between the pair of rods 51 is made greater than the thickness of the platform stopper 30, and through this structural improvement, it is possible to effectively prevent safety accidents caused by the random unfolding of the platform stopper 30.

[0055] The tension spring 70 is an elastic member for connecting between the support portion 31 of the platform stopper 30 and the acting point 50b of the operating lever 50. One end is connected to the support portion 31 of the platform stopper 30, and the other end is connected to the second connecting rod 53. By connecting between the support portion 31 of the platform stopper 30 and the acting point 50b of the operating lever 50 through the tension spring 70, when the lifting platform D rises and completely pushes up the platform stopper 30, a force for completely unfolding the platform stopper 30 can be provided, so that even if the rotation shaft of the platform stopper 30 is corroded, the platform stopper 30 can be easily unfolded. And, when the lifting platform D is supported by the platform stopper 30 in a state where the platform stopper 30 is not completely unfolded due to corrosion of the rotation shaft of the platform stopper 30, etc., the platform stopper 30 may fold up and cause the lifting platform D to drop. In the present invention, since the tension spring 70 is connected between the support portion 31 of the platform stopper 30 and the acting point 50b of the operating lever 50, the platform stopper 30 can be easily unfolded and stably support the lifting platform D.

[0056] The tension spring 70 may be composed of a pair, respectively connecting between both side surfaces of the platform stopper 30 and both ends of the second link 53. The tension spring 70 composed of a pair can improve the operation stability of the platform stopper 30. For example, even if one of the pair of tension springs 70 fails, the elastic force can be adjusted to enable the platform stopper 30 to operate smoothly. However, forming the tension spring 70 into a pair is only an example, and it may also be formed into two or more according to needs. Since the operating rod 50 includes a pair of rods 51, and a pair of tension springs 70 connect between both side surfaces of the platform stopper 30 and both ends of the second link 53, and the forces on both sides are balanced, the operating rod 50 can stably drive the platform stopper 30 to rotate. Since the operating rod 50 is formed by a pair of rods 51, even if one rod 51 is damaged or fails during operation, the minimum function can still be maintained. And, even based on the basic state where the platform stopper 30 is deployed to the lifting platform D, when the displacement of the side where the tension spring 70 is connected to the support portion 31 and the displacement of the other side where the tension spring 70 is connected to the operating rod 50 change, applying a certain force can still enable the platform stopper 30 to rotate without breaking the tension spring 70. By adjusting the length and tension of the tension spring 70, the force and displacement for deploying the platform stopper 30 can be adjusted, so that lifting platforms D of various sizes and shapes can be conveniently supported.

[0057] On the other hand, referring to Figure 5 , the operating rod 50 can be connected to the support portion 31 of the platform stopper 30 through the link portion 80. The link portion 80 includes: a first link 80a, one end of which is hinged to the support portion 31 of the platform stopper 30; and a second link 80b, one end of which is hinged to the other end of the first link 80a, and the other end of which is hinged to the acting point 50b of the operating rod 50, more specifically, to the second link 53. One end of the first link 80a is hinged to the support portion 31, and both ends of the second link 80b are respectively hinged to the other end of the first link 80a and the second link 53. Therefore, the first link 80a and the second link 80b can freely bend to deploy or retract the platform stopper 30.

[0058] Hereinafter, referring to Figure 6 and Figure 7 , the operation of the lifting platform safety support device 1 will be described in detail.

[0059] Figure 6 and Figure 7 are operation diagrams for illustrating the operation of the lifting platform safety support device.

[0060] One end of the operating rod 50 of the lifting platform safety support device 1 of the present invention contacts the lifting platform D to form a force receiving point 50a for receiving force, and the other end of the operating rod 50 is connected to the support portion 31 of the platform stopper 30 rotatably coupled between a pair of fixed pieces 20 to form an action point 50b for pulling the platform stopper 30. The force receiving point 50a and the action point 50b of the operating rod 50 are rotatably coupled between a pair of lever fixing pieces 40, so that it can move automatically without the help of workers or machines, and can support the lifting platform to a predetermined position or lower it to the lowest level. In particular, when the lifting platform D rises and completely pushes up the platform stopper 30, the platform stopper 30 unfolds by its own weight, and the tension spring 70 pushes the platform stopper 30 to completely unfold, so that even if the rotating shaft of the platform stopper 30 is corroded, the platform stopper 30 can be easily unfolded. And, the distance between a pair of rods 51 constituting the operating rod 50 is greater than the thickness of the platform stopper 30, so that when the force receiving point 50a of the operating rod 50 descends by the lifting platform D, the platform stopper 30 rotates and is inserted between the rods 51, and the first link 52 rotates to the outside of the platform stopper 30, thereby preventing the platform stopper 30 from unfolding in the case of damage to the tension spring 70 or the link portion 80, to prevent safety accidents caused by the fall of the lifting platform D.

[0061] Figure 6 It is an operation diagram for explaining the operation of fixing at a predetermined position by lifting and lowering the lifting platform. Figure 7 It is an operation diagram for explaining the operation of lowering the lifting platform.

[0062] First, refer to Figure 6 , one side of the lifting platform D is connected to a lifting device (not shown), as shown in (a) of Figure 6 , it can rise in the vertical direction. As the lifting platform D rises, as shown in (b) of Figure 6 , the platform stopper 30 is pushed, causing the tension spring 70 connected to the platform stopper 30 to gradually bend. The lifting platform D further rises and the side contacts one end of the operating rod 50 and completely passes the platform stopper 30, then the lifting device can stop the lifting platform D from rising. At this time, as shown in (c) of Figure 6 , the platform stopper 30 can be completely unfolded by its own weight and the tension spring 70, the support portion 31 is horizontally arranged, and the rotation limiting portion 32 is supported by the fixing plate 10. If the platform stopper 30 unfolds and is in its initial state, as shown in (d) of Figure 6 , the lifting platform D can be lowered and placed on the support portion 31. At this time, one end of the operating rod 50 can be supported by the side of the lifting platform D by the elastic force of the torsion spring 60 to limit the horizontal movement of the lifting platform D.

[0063] Next, refer to Figure 7, in a state where the lifting platform D is placed on the support portion 31 of the platform stopper 30 and the operating rod 50 supports the side surface of the lifting platform D (as shown in (a) of Figure 7 ), it can be connected to the lifting device through one side of the lifting platform D (as shown in (b) of Figure 7 ) to rise in the vertical direction. If the lifting platform D rises, the posture of the operating rod 50 can be maintained at a position where the forces of the torsion spring 60 and the tension spring 70 cancel each other out. When the lifting platform D is gradually lowered with the operating rod 50 held in the initial position (as shown in (c) of Figure 7 ), the force application point 50a of the operating rod 50 is pressed downward, and the action point 50b of the operating rod 50 is lifted upward. Thus, through the tension spring 70, the platform stopper 30 connected to the operating rod 50 can be gradually pulled toward the fixing plate 10 side. If the lifting platform D is further lowered, as shown in (d) of Figure 7 , the platform stopper 30 can be inserted between the rods 51, and the first link 52 rotates to the outside of the platform stopper 30. Thus, the platform stopper 30 can be completely pulled toward the fixing plate 10 to open the passage of the lifting platform D, and the lifting platform D descends through the platform stopper 30.

[0064] Although embodiments of the present invention have been described with reference to the accompanying drawings, those of ordinary skill in the art to which the present invention pertains should understand that the present invention can be implemented in different specific forms without changing the technical idea or essential features of the present invention. Therefore, the above embodiments should be understood as illustrative in all aspects and not restrictive.

Claims

1. A safety support device for a lifting platform, characterized in that: include: A fixed plate, which is arranged on a supporting structure for raising and lowering the lifting platform; a pair of fixing pieces protruding side by side from the fixing plate toward the lifting platform; a platform stopper, disposed between the fixing plates and rotatably coupled to the fixing plates, one end of which extends toward the lifting platform to form a supporting portion supporting the lifting platform, and the other end of which contacts the fixing plate to form a rotation limiting portion for limiting the downward rotation of the supporting portion; a pair of lever fixing pieces protruding from the fixing plate or the fixing piece; An operating rod, one end of which contacts the lifting platform to form a force point for receiving force, and the other end of which is connected to the support portion of the platform stopper to form an action point for pulling the platform stopper, wherein the force point and the action point are rotatably connected to the lever fixing plate; and The torsion spring is disposed between the lever fixing plate and the operating rod and is used for maintaining the posture of the operating rod.

2. The lifting platform safety support device according to claim 1, characterized in that: Also includes: A tension spring is used to connect the support portion of the platform stopper and the action point of the operating rod.

3. The lifting platform safety support device according to claim 2, characterized in that: In the platform stopper, when the force is not transmitted to the force receiving point, the support portion rotates by its own weight so that the rotation limiting portion is supported by the fixing plate, The posture of the operating lever is maintained at a position where the force of the tension spring and the force of the torsion spring cancel each other out.

4. The lifting platform safety support device according to claim 2, characterized in that: The operating lever comprises: A pair of rods arranged in parallel; A first connecting rod, used to connect the rods at the force bearing point; and The second connecting rod is used to connect the rods at the action point, and one end of the tension spring is fixed to the second connecting rod.

5. The safety support device for a lifting platform according to claim 4, characterized in that: The spacing between the rods of the operating rod is greater than the thickness of the platform stopper, so that when the force point descends from the lifting platform, the platform stopper rotates and is inserted between the rods, and the first connecting rod rotates to the outside of the platform stopper.

6. The safety support device for a lifting platform according to claim 5, characterized in that: The tension spring is composed of a pair, and is respectively connected between the two side surfaces of the platform stopper and the second connecting rod.

7. The safety support device for a lifting platform according to claim 1, characterized in that: Also included is a linking portion, the linking portion comprising: A first link, one end of which is hinged to the support portion of the platform stopper; and The second linking member has one end hinged to the other end of the first linking member, and the other end hinged to the action point of the operating rod.

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