Automatic pulley type stretcher for ship stair transfer

Abstract

The invention discloses an automatic pulley type stretcher for ship stair transfer, and relates to the technical field of medical instruments, the automatic pulley type stretcher is characterized by comprising a first bed board, a second bed board, guardrails, a power set and a traction set, and the second bed board is movably connected to the first bed board; the two groups of guardrails are fixedly connected to the two long edges of the first bed board respectively and comprise two supporting columns, a plurality of supporting rods and a cross rod, the supporting columns are connected to the corner positions of the first bed board, the cross rod is fixedly connected between the two supporting columns, and the supporting rods are fixedly connected between the cross rod and the first bed board; the four power sets are movably connected to the top ends of the supporting columns correspondingly. The traction group is movably connected to the cross rod, and a traction rope is fixedly connected between the traction group and the second bed board; two short sides of the first bed board are fixedly connected with two holding rods respectively. Transfer personnel do not need to lift on stairs, the technical problems that the ship stairs are narrow, the angle is large, and transfer is inconvenient are effectively solved, and operation is easy, safe, reliable, convenient and fast.

Description

Technical Field

[0001] The present invention relates to the technical field of medical instruments, and more particularly to an automatic pulley stretcher for transporting on ship stairs. Background Art

[0002] Stretchers are transport tools for patients and wounded to lie down. Since the corridors and stairways of ships are relatively narrow, it has a great adverse effect on the transportation process. Ordinary stretchers generally require 2-4 people to operate, which is very difficult to pass through narrow corridors, and the physical strength required for the transporters is higher when going up and down stairs. Improper operation may cause secondary injuries to the wounded.

[0003] Patent CN211535217U discloses a stretcher trolley that can be used up and down ship stairs, comprising a frame, a tripod rotatably connected to the frame, and a telescopic rod fixedly installed on the frame, the other end of the telescopic rod is hinged to the stretcher chassis, and a stretcher is fixedly installed on the stretcher chassis, a fixed shaft is fixedly installed on the frame, and the stretcher chassis is rotatably connected to the fixed shaft, a handrail is fixedly installed on the frame, and anti-collision rollers are fixedly installed on the frame, an anti-slip layer is provided on the tripod, a disc brake pad is fixedly installed on the frame, and the disc brake pad is connected to the brake handle through a brake line. The tripod arranged on the frame can be used on the stairs, which reduces the burden on medical staff. At the same time, telescopic rods are arranged at the front and rear ends of the stretcher, so that the stretcher can be rotated at a certain angle to avoid congestion in the head of the wounded due to the steepness of the ship stairs.

[0004] Existing stretcher trolleys with track wheels have a hidden danger of poor grip when going up and down stairs, and auxiliary devices are needed. The track wheels are a long and straight whole, and the angle cannot be changed to fit the ground at the top of the stairs, and manpower is needed. Ordinary round wheels or triangular wheels are used, and there is a bump due to the difference in height between the wheels and the stairs, which is not good for the injured. In addition, the stretcher trolley is large in size and not suitable for storage. Summary of the invention

[0005] The purpose of the present invention is to solve the above-mentioned problem and to provide an automatic pulley stretcher for transporting on ship stairs. The transporting personnel only need to operate at the upper and lower stairs, and there is no need to carry the stretcher up the stairs. This effectively overcomes the technical difficulties of narrow ship stairs, large angles, and inconvenient transportation. The operation is simple, safe, reliable, convenient and fast.

[0006] The above technical objectives of the present invention are achieved through the following technical solutions: an automatic pulley stretcher for ship staircase transfer, comprising a first bed board, a second bed board, a guardrail, a power group and a pulling group, the first bed board is provided with an embedding groove for the second bed board to be embedded, and the second bed board is movably connected to the embedding groove; the guardrails are arranged in two groups, and the two groups of the guardrails are respectively fixedly connected to the two long sides of the first bed board, and each group of the guardrails respectively comprises two supporting columns, a plurality of supporting rods and a cross bar, the supporting columns are fixedly connected to the corner positions of the first bed board, the cross bar is fixedly connected between the two supporting columns, and a plurality of the supporting rods are fixedly connected between the cross bar and the first bed board; the power groups are arranged in four groups, and are respectively movably connected to the top ends of the supporting columns; the pulling group is movably connected to the cross bar, and a pulling rope is fixedly connected between the pulling group and the second bed board; two gripping rods are respectively fixedly connected to the two short sides of the first bed board.

[0007] By adopting the above technical solution, when a patient needs to be transferred, the patient's upper body is first placed on the first bed board, and the lower body is placed on the second bed board, and then the pulling rope is driven by the pulling group to move, thereby driving the second support board to deform into an L shape. This design can ensure that when the patient is transferred on the stairs, the buttocks are used to block the patient from sliding down, and the guardrails on both sides can prevent the patient from sliding down from the side.

[0008] After the patient is placed, if it is necessary to go up the stairs, the transfer personnel at the head position connects the power groups on both sides of the head with the railings on both sides of the stairs by holding the handle, and then starts the two power groups. The two power groups drive the entire stretcher and the patient to move up along the railings until the transfer personnel at the rear position approaches the stairs, and then the transfer personnel at the rear position connects the power groups on both sides of the tail with the railings on both sides of the stairs by holding the handle. At this time, the four power groups act simultaneously to drive the entire stretcher and the patient to move up. When the two power groups at the head position reach the top of the stairs, the transfer personnel at the head position separate the power groups on both sides of the head from the railings by holding the handle, and the two power groups at the tail position continue to move until they reach the top of the railings, and the transfer personnel at the tail position separates the power groups on both sides of the tail from the railings by holding the handle, thereby completing the transfer of the patient on the stairs; conversely, if it is necessary to transfer down the stairs, the above operation process is opposite to the above operation process, and the tail is connected to the railing first, and then the head is connected to the railing; the tail is separated from the railing first, and then the head is separated from the railing.

[0009] The transfer personnel only need to operate at the up and down stairs, without the need to carry the goods up the stairs. This effectively overcomes the technical difficulties of narrow and large-angle ship stairs, which make transfer inconvenient. The operation is simple, safe, reliable, convenient and fast.

[0010] The present invention is further configured as follows: the power group includes an L-shaped first support plate, the first support plate is movably connected to a second support plate, a first rotating shaft is rotatably connected between the second support plate and the first support plate, the first rotating shaft is fixedly connected to a first pulley, the first rotating shaft is connected to a motor after passing through the first support plate, and the motor is fixedly connected to the first support plate.

[0011] By adopting the above technical solution, the power provided by the first motor is used to drive the first pulley to rotate along the railing, thereby driving the entire stretcher and the patient to be transferred.

[0012] The present invention is further configured as follows: the first support plate is fixedly connected with two limit cylinders, the two limit cylinders are symmetrically arranged compared to the first rotating axis, and the two limit cylinders are fixedly connected with first springs, the two first springs are fixedly connected with limit rods, the two limit rods slide in the two limit cylinders respectively, and the other ends of the two limit rods are fixedly connected to the second support plate.

[0013] The present invention is further configured such that: the bottoms of the first support plate and the second support plate are both axially rotatably connected with a second pulley.

[0014] By adopting the above technical solution, the second support plate is elastically connected to the first support plate by using two first springs and the first limit rod, and a second pulley is provided, so that the power group can be stably clamped on the railing for movement without derailment, thereby greatly increasing the safety of operation; at the same time, it provides convenience for the transport personnel to connect the power group with the railing, and they only need to put the power group on the railing. Due to the elastic connection of the second support plate, it will first be stretched open by the railing, and after reaching the clamping position, it will automatically retract to complete the fixation; the power group is separated from the railing, and only the entire stretcher needs to be put on the platform.

[0015] The present invention is further configured such that: the first pulley and the second pulley are both provided with arc grooves of the same radius.

[0016] By adopting the above technical solution and setting the arc groove, the first pulley and the second pulley can fit the railing with a larger area, thereby increasing friction and ensuring smooth and safe operation.

[0017] The present invention is further configured as follows: a connecting block is fixedly provided on the top of the first supporting plate, the connecting block is fixedly connected to a second rotating shaft, and the second rotating shaft is rotatably connected to the supporting column.

[0018] By adopting the above technical solution, when the power groups on both sides of the head are connected to the railing first or when the power groups on both sides of the tail are connected to the railing first, it is convenient for the transport personnel to adjust the angle in time following the transport of the stretcher, thereby achieving safer and more stable transport.

[0019] The present invention is further configured as follows: the cross bar is provided with a through hole close to the second bed board, a traction rod is rotatably connected in the through hole, the traction rod is fixedly connected to two winding wheels, and the pulling rope is fixedly connected to the winding wheels; the cross bar is provided with two annular notches for the winding wheels to rotate, and a plurality of U-shaped connecting plates are fixedly connected between the cross bars at both ends of the two annular notches.

[0020] The present invention is further configured as follows: the traction rod is fixedly connected to a traction disc after passing through the support column, the traction disc is fixedly connected to an eccentric rocker, and a portion of the traction rod located in the support column is circumferentially provided with a plurality of slots.

[0021] The present invention is further configured as follows: a limiting hole corresponding to the card slot is provided on the top of the support column, a T-shaped limiting pin is slidably connected in the limiting hole, and a second spring is connected between the limiting pin and the support column.

[0022] The present invention is further configured as follows: the second support board includes two short boards and one long board, hinges are hinged between the short board and the first bed board, between the two short boards, and between the short board and the long board, and the pulling rope is fixedly connected to the four corners of the long board.

[0023] By adopting the above technical solution, after the patient is placed on the stretcher, the limiting pin is first lifted up, and the eccentric rocker is rotated by hand, which in turn drives the traction disc, the traction rod and the winding wheel to rotate, and the traction rope is wound around the winding wheel, thereby driving the second support plate to deform. Since the second support plate is composed of two short plates and a long plate hinged to each other, and the traction rope is only fixed to the four corners of the long plate, the second support plate will be deformed into an L shape. At this time, the limiting pin is released and inserted into the card slot under the action of the second spring to complete the fixation; the patient is put in a posture similar to sitting on the second support plate, thereby forming a barrier when transferring on the stairs to prevent slipping.

[0024] In summary, the present invention has the following beneficial effects:

[0025] 1. When the patient needs to be transferred, the present invention first places the patient's upper body on the first bed board and the lower body on the second bed board, and then drives the pulling rope to move through the pulling group to drive the second support board to deform into an L shape. This design can ensure that when the patient is transferred on the stairs, the buttocks are used to block the patient from sliding down, and the guardrails on both sides can prevent the patient from sliding down from the side. After the patient is placed, if it is necessary to go up the stairs, the transfer personnel at the head connects the power groups on both sides of the head with the railings on both sides of the stairs by holding the grip rod, and then starts the two power groups after the connection. The two power groups drive the entire stretcher and the patient to move up along the railings until the transfer personnel at the rear are close to the stairs. Then the transfer personnel at the rear end connect the power groups on both sides of the rear end with the railings on both sides of the stairs by holding the handle. At this time, the four power groups work simultaneously to drive the entire stretcher and the patient to move up. When the two power groups at the head end reach the top of the stairs, the transfer personnel at the head end hold the handle to separate the power groups on both sides of the head end from the railings. The two power groups at the rear end continue to move until they reach the top of the railings. The transfer personnel at the rear end hold the handle to separate the power groups on both sides of the rear end from the railings, thereby completing the transfer of the patient on the stairs. Conversely, if the patient needs to be transferred down the stairs, the above operation process is the opposite. The tail end is connected to the railing first, and then the head end is connected to the railing; the tail end is separated from the railing first, and then the head end is separated from the railing. The transfer personnel only need to operate at the entrance of the stairs, without the need to carry the patient up the stairs. This effectively overcomes the technical difficulties of narrow ship stairs, large angles, and inconvenient transfer. The operation is simple, safe, reliable, convenient and fast.

[0026] 2. The present invention utilizes two first springs and a first limiting rod to elastically connect the second supporting plate to the first supporting plate, and arranges a second pulley, so that the power group can be stably clamped on the railing for movement without derailment, thereby greatly increasing the safety of operation; at the same time, it provides convenience for the transport personnel to connect the power group with the railing, and only needs to put the power group on the railing. Due to the elastic connection of the second supporting plate, it will first be stretched open by the railing, and after reaching the clamping position, it will automatically retract to complete the fixation; the power group is separated from the railing, and only the entire stretcher needs to be put on the stage.

[0027] 3. The present invention provides arc grooves on the first pulley and the second pulley, so that the first pulley and the second pulley can have a larger area to fit the railing, increase friction, and effectively ensure smooth and safe operation;

[0028] 4. After the patient is placed on the stretcher, the limit pin is lifted up and the eccentric rocker is rotated by hand, which drives the traction disc, the traction rod and the winding wheel to rotate in turn, and the traction rope is wound around the winding wheel, thereby driving the second support plate to deform. Since the second support plate is composed of two short plates and a long plate hinged to each other, and the traction rope is only fixed to the four corners of the long plate, the second support plate will be deformed into an L shape. At this time, the limit pin is released and inserted into the card slot under the action of the second spring to complete the fixation; the patient is put in a posture similar to sitting on the second support plate, thereby forming a barrier when transferring on the stairs to prevent slipping; the safe transportation of the patient is fully guaranteed. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a structural diagram of a stretcher in an embodiment of the present invention;

[0030] Figure 2 is a structural diagram of a power group in an embodiment of the present invention;

[0031] Figure 3 is a structural diagram of a pulling group in an embodiment of the present invention;

[0032] Figure 4 is an exploded view of the pulling group in an embodiment of the present invention;

[0033] Figure 5 is a structural diagram of a first bed board and a second bed board in an embodiment of the present invention;

[0034] Figure 6 is a state diagram of a stretcher at the bottom of stairs in an embodiment of the present invention;

[0035] Figure 7 is a state diagram of a stretcher in the middle of a staircase according to an embodiment of the present invention;

[0036] Figure 8 1 is a state diagram of a stretcher located at the top of stairs in an embodiment of the present invention.

[0037] In the figure: 1, first bed board; 11, embedded groove; 2, second bed board; 21, short board; 22, long board; 23, hinge; 3, guardrail; 31, support column; 311, limit hole; 32, support rod; 33, cross bar; 331, through hole; 332, traction rod; 333, winding wheel; 334, annular notch; 335, U-shaped connecting plate; 336, traction plate; 337, eccentric rocker; 33 8. Slot; 34. Limit pin; 35. Second spring; 4. Power group; 41. First support plate; 411. Limit cylinder; 42. Second support plate; 421. Limit rod; 43. First rotating shaft; 44. First pulley; 45. Motor; 46. First spring; 47. Second pulley; 48. Connecting block; 49. Second rotating shaft; 5. Pulling group; 6. Pulling rope; 7. Grip; 8. Railing. DETAILED DESCRIPTION

[0038] In order to enable those skilled in the art to better understand the solution of the present invention, the technical solution of the present invention will be further described in detail below in conjunction with the embodiments of the present invention and the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0039] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present invention can be combined with each other. The present invention will be described in detail below in conjunction with the embodiments.

[0040] Example:

[0041] like Figure 1-Figure 5 As shown, an automatic pulley stretcher for transporting on ship stairs comprises a first bed board 1, a second bed board 2, a guardrail 3, a power group 4 and a pulling group 5. Two short sides of the first bed board 1 are respectively fixedly connected with two gripping rods 7. The first bed board 1 is provided with an embedding groove 11 for embedding the second bed board 2, and the second bed board 2 is movably connected to the embedding groove 11; there are two groups of guardrails 3, and the two groups of guardrails 3 are respectively fixedly connected to the two long sides of the first bed board 1, and each group of guardrails 3 comprises two supporting columns 31, a plurality of supporting rods 32 and a cross bar 33, the supporting columns 31 are fixedly connected to the corners of the first bed board 1, the cross bar 33 is fixedly connected between the two supporting columns 31, and a plurality of supporting rods 32 are fixedly connected between the cross bar 33 and the first bed board 1; there are four power groups 4, and they are respectively movably connected to the top ends of the supporting columns 31;

[0042] The power group 4 includes an L-shaped first support plate 41, the first support plate 41 is movably connected to the second support plate 42, a first rotating shaft 43 is rotatably connected between the second support plate 42 and the first support plate 41, a first rotating shaft 43 is fixedly connected to a first pulley 44, the first rotating shaft 43 passes through the first support plate 41 and is connected to a motor 45, and the motor 45 is fixedly connected to the first support plate 41. The power provided by the first motor 45 drives the first pulley 44 to rotate along the railing 8, thereby driving the entire stretcher and the patient to be transferred.

[0043] The first support plate 41 is fixedly connected with two limiting cylinders 411, which are symmetrically arranged compared to the first rotating shaft 43, and the two limiting cylinders 411 are fixedly connected with first springs 46, and the two first springs 46 are fixedly connected with limiting rods 421, and the two limiting rods 421 slide in the two limiting cylinders 411 respectively, and the other ends of the two limiting rods 421 are fixedly connected to the second support plate 42. The bottom of the first support plate 41 and the second support plate 42 are both axially rotatably connected with a second pulley 47. The second support plate 42 is elastically connected to the first support plate 41 by using two first springs 46 and a first limiting rod 421, and a second pulley 47 is provided, so that the power group 4 can be stably clamped on the railing 8 and move without derailing, which greatly increases the safety of operation; at the same time, it provides convenience for the transport personnel to connect the power group 4 with the railing 8. They only need to put the power group 4 on the railing 8. Due to the elastic connection of the second support plate 42, it will first be stretched open by the railing 8, and after reaching the clamping position, it will automatically retract to complete the fixation; the power group 4 is separated from the railing 8, and the entire stretcher only needs to be put on the stage.

[0044] The first pulley 44 and the second pulley 47 are both provided with arc grooves of the same radius. The arrangement of the arc grooves enables the first pulley 44 and the second pulley 47 to have a larger area to fit the railing 8, thereby increasing friction and ensuring smooth and safe operation.

[0045] A connecting block 48 is fixedly provided on the top of the first supporting plate 41, and a second rotating shaft 49 is fixedly connected to the connecting block 48, and the second rotating shaft 49 is rotatably connected to the supporting column 31. When the power groups 4 on both sides of the head are first connected to the railing 8 or when the power groups 4 on both sides of the tail are first connected to the railing 8, it is convenient for the transporter to adjust the angle in time with the transport of the stretcher, so as to achieve safer and more stable transport.

[0046] The pulling group 5 is movably connected to the cross bar 33. The cross bar 33 is provided with a through hole 331 close to the second bed board 2. A traction rod 332 is rotatably connected in the through hole 331. The traction rod 332 is fixedly connected to two winding wheels 333. The pulling rope 6 is fixedly connected to the winding wheels 333. The cross bar 33 is provided with two annular notches 334 for the winding wheels 333 to rotate. A plurality of U-shaped connecting plates 335 are fixedly connected between the cross bar 33 at both ends of the two annular notches 334. The traction rod 332 is fixedly connected to a traction disc 336 after passing through the support column 31. The traction disc 336 is fixedly connected to an eccentric rocker 337. A plurality of slots 338 are circumferentially provided on the part of the traction rod 332 located in the support column 31. A limiting hole 311 corresponding to the slot 338 is provided on the top of the support column 31. A T-shaped limiting pin 34 is slidably connected in the limiting hole 311. A second spring 35 is connected between the limiting pin 34 and the support column 31.

[0047] A pulling rope 6 is fixedly connected between the pulling group 5 and the second bed board 2; the second support board 42 includes two short boards 21 and a long board 22, and hinges 23 are hinged between the short board 21 and the first bed board 1, between the two short boards 21, and between the short board 21 and the long board 22, and the pulling rope 6 is fixedly connected to the four corners of the long board 22. After the patient is placed on the stretcher, the limiting pin 34 is first lifted up, and the eccentric rocker 337 is rotated by hand, which in turn drives the traction plate 336, the traction rod 332 and the winding wheel 333 to rotate, and the traction rope 6 is wound around the winding wheel 333, thereby driving the second support plate 42 to deform. Since the second support plate 42 is composed of two short plates 21 and a long plate 22 hinged to each other, and the traction rope is only fixed to the four corners of the long plate 22, the second support plate 42 will be deformed into an L shape. At this time, the limiting pin 34 is released and inserted into the card slot 338 under the action of the second spring 35 to complete the fixation; the patient is in a posture similar to sitting on the second support plate 42, thereby forming a barrier when transferring on the stairs to prevent slipping.

[0048] Working principle: When a patient needs to be transferred, the patient's upper body is first placed on the first bed board 1, and the lower body is placed on the second bed board 2, and then the pulling rope 6 is driven by the pulling group 5 to move, thereby driving the second support board 42 to deform into an L shape. This design can ensure that when the patient is transferred on the stairs, the buttocks can be used to prevent him from sliding down, and the guardrails 3 on both sides can prevent him from sliding down from the side.

[0049] After the patient is placed, Figure 6 As shown, if it is necessary to go up the stairs, the transporter at the head connects the power groups 4 on both sides of the head with the railings 8 on both sides of the stairs by holding the handle 7, and then starts the two power groups 4. The two power groups 4 drive the entire stretcher and the patient to move up along the railings 8 until the transporter at the rear approaches the stairs, and then the transporter at the rear connects the power groups 4 on both sides of the rear with the railings 8 on both sides of the stairs by holding the handle 7. Figure 7 As shown, at this time, the four power groups 4 act simultaneously to drive the entire stretcher and the patient to move up. When the two power groups 4 at the head reach the top of the stairs, as shown in FIG. Figure 8 As shown, the transporter at the head holds the handle 7 to separate the power groups 4 on both sides of the head from the railing 8, and the two power groups 4 at the tail continue to move until they reach the top of the railing 8. The transporter at the tail holds the handle 7 to separate the power groups 4 on both sides of the tail from the railing 8, thereby completing the transport of the patient on the stairs; conversely, if the patient needs to be transported down the stairs, the operation process is opposite to the above-mentioned process, and the tail is connected to the railing 8 first, and then the head is connected to the railing 8; the tail is separated from the railing 8 first, and then the head is separated from the railing 8.

[0050] The transfer personnel only need to operate at the up and down stairs, without the need to carry the goods up the stairs. This effectively overcomes the technical difficulties of narrow and large-angle ship stairs, which make transfer inconvenient. The operation is simple, safe, reliable, convenient and fast.

[0051] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed. However, as long as they are within the scope of the claims of the present invention, they are protected by the patent law.

Claims

1. An automatic pulley stretcher for transporting on ship stairs, characterized by: The invention comprises a first bed board (1), a second bed board (2), a guardrail (3), a power group (4) and a pulling group (5), wherein the first bed board (1) is provided with an embedding groove (11) for embedding the second bed board (2), and the second bed board (2) is movably connected to the embedding groove (11); the guardrail (3) is provided with two groups, and the two groups of the guardrail (3) are respectively fixedly connected to the two long sides of the first bed board (1), and each group of the guardrail (3) comprises two support columns (31), a plurality of support rods (32) and a cross bar (33), and the support columns (31) are fixedly connected to the At the corner of the first bed board (1), the cross bar (33) is fixedly connected between the two support columns (31), and a plurality of support rods (32) are fixedly connected between the cross bar (33) and the first bed board (1); the power group (4) is provided with four groups in total, and they are movably connected to the top ends of the support columns (31); the pulling group (5) is movably connected to the cross bar (33), and a pulling rope (6) is fixedly connected between the pulling group (5) and the second bed board (2); and two gripping rods (7) are fixedly connected to the two short sides of the first bed board (1).

2. The automatic pulley stretcher for ship stairway transport according to claim 1 is characterized by: The power group (4) comprises an L-shaped first support plate (41), the first support plate (41) is movably connected to a second support plate (42), a first rotating shaft (43) is rotatably connected between the second support plate (42) and the first support plate (41), the first rotating shaft (43) is fixedly connected to a first pulley (44), the first rotating shaft (43) passes through the first support plate (41) and is connected to a motor (45), and the motor (45) is fixedly connected to the first support plate (41).

3. The automatic pulley stretcher for ship stairway transport according to claim 2 is characterized by: The first support plate (41) is fixedly connected with two limiting cylinders (411), the two limiting cylinders (411) are symmetrically arranged compared to the first rotating shaft (43), and the two limiting cylinders (411) are fixedly connected with first springs (46), the two first springs (46) are both fixedly connected with limiting rods (421), the two limiting rods (421) slide in the two limiting cylinders (411) respectively, and the other ends of the two limiting rods (421) are fixedly connected to the second support plate (42).

4. The automatic pulley stretcher for ship stairway transport according to claim 2 is characterized by: The bottoms of the first support plate (41) and the second support plate (42) are both axially rotatably connected with a second pulley (47).

5. The automatic pulley stretcher for ship stairway transport according to claim 4 is characterized by: The first pulley (44) and the second pulley (47) are both provided with arc grooves with the same radius.

6. The automatic pulley stretcher for ship stairway transport according to claim 2 is characterized by: A connecting block (48) is fixedly provided on the top of the first supporting plate (41), and the connecting block (48) is fixedly connected to a second rotating shaft (49), and the second rotating shaft (49) is rotatably connected to the supporting column (31).

7. The automatic pulley stretcher for ship stairway transport according to claim 1 is characterized by: The cross bar (33) is provided with a through hole (331) close to the second bed board (2); a traction rod (332) is rotatably connected in the through hole (331); the traction rod (332) is fixedly connected to two winding wheels (333); the pulling rope (6) is fixedly connected to the winding wheels (333); the cross bar (33) is provided with two annular notches (334) for the winding wheels (333) to rotate; a plurality of U-shaped connecting plates (335) are fixedly connected between the cross bar (33) at both ends of the two annular notches (334).

8. The automatic pulley stretcher for ship stairway transport according to claim 7 is characterized by: The traction rod (332) passes through the support column (31) and is fixedly connected to a traction disc (336), and the traction disc (336) is fixedly connected to an eccentric rocker (337). A plurality of slots (338) are provided in the circumference of the portion of the traction rod (332) located inside the support column (31).

9. The automatic pulley stretcher for ship stairway transport according to claim 8, characterized in that: A limiting hole (311) corresponding to the clamping slot (338) is provided at the top of the support column (31), a T-shaped limiting pin shaft (34) is slidably connected in the limiting hole (311), and a second spring (35) is connected between the limiting pin shaft (34) and the support column (31).

10. The automatic pulley stretcher for ship stairway transfer according to claim 1, characterized in that: The second support plate (42) comprises two short plates (21) and one long plate (22), and hinges (23) are hinged between the short plates (21) and the first bed board (1), between the two short plates (21), and between the short plates (21) and the long plate (22), and the pulling rope (6) is fixedly connected to the four corners of the long plate (22).

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