Stretcher

Abstract

To provide a stretcher that enables a stretcher body to be lifted and lowered easily.SOLUTION: A stretcher 100 equipped with a first leg part link 20 and a second leg part link 30 for lifting and lowering a stretcher body 10 includes: a first string-like member 41 attached to the first leg part link 20 for adjusting the height of the first leg part link 20 by pulling the first leg part link 20; a second string-like member 42 attached to the second leg part link 30 for adjusting the height of the second leg part link 30 by pulling the second leg part link 30; a pulley 43 for winding the first string-like member 41 and the second string-like member 42; a speed reducer 44 for rotating the pulley 43; a motor 45 for driving the speed reducer 44; a battery 46 for supplying electric power to the motor 45; and a control part 47 for controlling driving of the motor 45.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a stretcher having a first leg link and a second leg link that raise and lower the stretcher body. [Background technology]

[0002] A stretcher equipped with a first leg link and a second leg link that raises and lowers the stretcher body is known (see, for example, Patent Document 1). This type of stretcher is primarily used for emergency situations and is mounted in an ambulance to transport emergency patients. This emergency stretcher is used by folding the first leg link and the second leg link to set the stretcher to its lowest position, and by unfolding the first leg link and the second leg link from the stretcher body to set the stretcher to its highest position. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent Publication No. 2010-284366 Summary of the Invention [Problem to be solved by the invention]

[0004] However, with the conventional stretchers described above, the worker manually lifts and lowers the stretcher body using his or her back muscles, which places a heavy burden on the worker's lower back, especially when loading a large injured person onto the stretcher or when transporting the injured person multiple times.

[0005] In addition, due to factors such as the aging of emergency medical personnel and an increase in the number of female emergency medical personnel, there has been an increasing need for stretchers that allow the body of the stretcher to be easily raised and lowered.

[0006] SUMMARY OF THE INVENTION An object of the present invention is to solve the problems of the conventional art and to provide a stretcher in which the stretcher body can be easily raised and lowered. [Means for solving the problem]

[0007] The present invention provides a stretcher having a first leg link and a second leg link for raising and lowering the stretcher body, characterized in that it comprises: a first string-like member attached to the first leg link and adjusting the height of the first leg link by pulling the first leg link; a second string-like member attached to the second leg link and adjusting the height of the second leg link by pulling the second leg link; a pulley that winds up the first string-like member and the second string-like member; a reducer that rotates the pulley; a motor that drives the reducer; a battery that supplies power to the motor; and a control unit that controls the drive of the motor.

[0008] In this case, the first string-like member may extend from the pulley toward a first end of the stretcher body, and the second string-like member may extend from the pulley toward a second end of the stretcher body. The first string-like member or the second string-like member may move while being folded back on a guide provided at a distance from the pulley. The pulley may be provided so that the first string-like member and the second string-like member pull the first leg link and the second leg link to the uppermost position approximately simultaneously. The reducer, the motor, and the battery may be provided on the back side of the stretcher body. The reducer, the motor, and the battery may be provided at a distance from the stretcher body. At least one of the first string-like member and the second string-like member may be a belt. The battery may be provided between a pair of casters directly attached to the stretcher body. The control unit may unlock the first leg link and the second leg link before adjusting the height of at least one of the first leg link and the second leg link. The control unit may stop driving the motor when at least one of the first leg link and the second leg link has moved to an uppermost position. The control unit may stop driving the motor when at least one of the first leg link and the second leg link has moved to a lowermost position. [Effects of the Invention]

[0009] The present invention can provide a stretcher in which the stretcher body can be easily raised and lowered. [Brief explanation of the drawings]

[0010] [Figure 1] FIG. 2 is a perspective view of the stretcher according to the embodiment in the uppermost position. [Figure 2] FIG. 10 is a perspective view of the stretcher in its lowest position. [Figure 3] 1 shows a block diagram of a stretcher. [Figure 4]FIG. 2 is an exploded perspective view of the stretcher with the lifting device removed. [Figure 5] FIG. [Figure 6] A schematic diagram of the area around the link slide is shown. [Figure 7] FIG. 1 shows a cross-sectional view of the stretcher near the battery. [Figure 8] 10 shows a flowchart of the stretcher lift control. DETAILED DESCRIPTION OF THE INVENTION

[0011] Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. Fig. 1 shows a perspective view of the stretcher in the uppermost position, Fig. 2 shows a perspective view of the stretcher in the lowermost position, Fig. 3 shows a block diagram of the stretcher, Fig. 4 shows an exploded perspective view of the stretcher with the lifting device removed, Fig. 5 shows a perspective view of the reducer unit, Fig. 6 shows a schematic diagram of the area near the link slides, and Fig. 7 shows a cross-sectional view of the stretcher near the battery. For ease of understanding, Fig. 6 shows a schematic diagram of the first link slide 21a hitting one of the limit switches 48 to detect that the first leg link 20 is in the lowermost position, and the second link slide 32a hitting the other limit switch 48 to detect that the second leg link 30 is in the uppermost position.

[0012] The stretcher 100 is an emergency stretcher that is mounted on an ambulance and used to transport emergency patients. As shown in Fig. 1, the stretcher 100 includes a stretcher body 10, a first leg link 20, a second leg link 30, and an elevating device 40.

[0013] The stretcher body 10 is a stretcher on which an injured person or the like is laid on the front side, and is formed by combining a tube extending in a longitudinal direction L from a first end 10a to a second end 10b with a tube extending in a lateral direction W perpendicular to the longitudinal direction L. A first leg link 20 and a second leg link 30 are attached to the back side of the stretcher body 10. A rotatable body-side caster 11 is provided at the first end 10a of the stretcher body 10, which is used when the stretcher body 10 is loaded into an ambulance.

[0014] The first leg link 20 is attached to the back side of the stretcher body 10 between the body side caster 11 and the second leg link 30. This first leg link 20 includes a first main link 21 and a first holding link 22.

[0015] The first main link 21 has a first caster 23 fixedly attached to its tip, and a first link slide 21a (see FIG. 6) formed of a circular tube extending in the lateral direction W at its base end. The first link slide 21a is slidable in the longitudinal direction L along the back surface of the stretcher body 10.

[0016] The first holding link 22 has a tip end rotatably attached to the first main link 21 near the middle position thereof, and a base end rotatably attached to the stretcher body 10 .

[0017] When the first link slide 21a of the first main link 21 slides in the longitudinal direction L, the angle of the first main link 21 and the first holding link 22 relative to the stretcher body 10 changes. As a result, when the stretcher 100 is in a normal state not loaded on an ambulance and the first link slide 21a slides toward the second end 10b, the distance between the stretcher body 10 and the first caster 23 becomes smaller, and the height of the stretcher 100 is adjusted lower.

[0018] Meanwhile, when the stretcher 100 is in a normal state, not being loaded onto an ambulance, and the first link slide 21a slides toward the first end 10a, the distance between the stretcher body 10 and the first caster 23 increases, and the height of the stretcher 100 is adjusted higher. When the stretcher 100 is loaded onto an ambulance, the first link slide 21a slides further toward the first end 10a, and the first link slide 21a moves to the vicinity of the base end of the first holding link 22. As a result, the first main link 21 tilts to an angle where it overlaps with the first holding link 22, and the first caster 23 moves toward the second leg link 30 and close to the stretcher body 10.

[0019] The second leg link 30 is attached to the back side of the stretcher body 10 at a position farther from the first end 10a than the first leg link 20. The second leg link 30 includes a second main link 31, a second holding link 32, a caster link 34, and a sub-link 35.

[0020] The second main link 31 has a caster link 34 rotatably attached to its tip, and a base end rotatably attached to the stretcher body 10.

[0021] A second caster 33 is rotatably attached to the tip of the caster link 34. A sub-link 35 is rotatably attached to this caster link 34 at a position offset from the second main link 31 via an arm that protrudes toward the first leg link 20.

[0022] The sub-link 35 extends along the second main link 31, with its tip end rotatably attached to the caster link 34 and its base end rotatably attached to the stretcher body 10. As shown in Figure 2, the pivot axis of the second caster 33 is designed to barely tilt even when the height of the stretcher 100 is adjusted to the lowest position.

[0023] 1, the tip of the second holding link 32 is rotatably attached near the middle position of the second main link 31, while the base end is formed of a circular tube extending in the lateral direction W and has a second link slide 32a (see FIG. 6) attached to it. This second link slide 32a is slidable in the longitudinal direction L along the back surface of the stretcher body 10.

[0024] When the second link slide 32a of the second holding link 32 slides in the longitudinal direction L, the angle of the second main link 31, the second holding link 32, and the sub-link 35 relative to the stretcher body 10 changes. As a result, when the second link slide 32a slides toward the second end 10b, the distance between the stretcher body 10 and the second caster 33 of the stretcher 100 decreases, and the height of the stretcher 100 is adjusted lower. On the other hand, when the second link slide 32a slides toward the first end 10a, the distance between the stretcher body 10 and the second caster 33 increases, and the height of the stretcher 100 is adjusted higher.

[0025] When the stretcher 100 is in its normal state and not loaded onto an ambulance, the stretcher body 10 rises when the first link slide 21a of the first leg link 20 and the second link slide 32a of the second leg link 30 both slide toward the first end 10a of the stretcher body 10, and the stretcher body 10 descends when the first link slide 21a of the first leg link 20 and the second link slide 32a of the second leg link 30 both slide toward the second end 10b of the stretcher body 10.

[0026] As shown in Figure 3, the lifting device 40 includes a first belt (first string-like member) 41, a second belt (second string-like member) 42, a pulley 43, a reducer 44, a motor 45, a battery 46, a control unit 47, a limit switch 48, a link lock release 49, and an operating unit 50.

[0027] 1, the first belt 41 is attached to the first leg link 20. This first belt 41 extends from the pulley 43 toward the first end 10a of the stretcher body 10 and then turns back at the guide 54, so that the height of the first leg link 20 can be adjusted by pulling the first link slide 21a of the first leg link 20.

[0028] Furthermore, the first belt 41 moves while being folded back on a guide 54 provided at a distance from the pulley 43, thereby pulling the first link slide 21a in the same direction as the second link slide 32a pulled by the second belt 42. As a result, even if the first link slide 21a and the second link slide 32a are pulled in the same direction, the pulley 43 is pulled simultaneously from both the first end 10a side and the second end 10b side with approximately the same force. Therefore, the pulley 43 is not pulled by a biased force from only one of the first end 10a side or the second end 10b side.

[0029] The second belt 42 is attached to the second leg link 30. This second belt 42 extends from the pulley 43 toward the second end 10b of the stretcher body 10, and the height of the second leg link 30 can be adjusted by pulling the second link.

[0030] 4, the pulley 43 has the ends of the first belt 41 and the second belt 42 attached thereto, and when the pulley 43 rotates, it winds up and unwinds the first belt 41 and the second belt 42. The pulley 43 is provided at a position where the first belt 41 and the second belt 42 pull the first leg link 20 and the second leg link 30 to the uppermost position substantially simultaneously.

[0031] 5, the reducer 44 has a motor 45 attached to its input shaft and a pulley 43 attached to its output shaft, and is configured to reduce the rotation speed of the motor 45 and transmit driving force to the pulley 43. The pulley 43, reducer 44, and motor 45 are integrally configured as a reducer unit 40a together with a pair of unit brackets 51, 51.

[0032] The motor 45 drives the reducer 44 under the control of the control unit 47 .

[0033] As shown in FIG. 3, the battery 46 is electrically connected to the motor 45, the control unit 47, the limit switch 48, and the link lock release 49 to supply power thereto.

[0034] The control unit 47 is electrically connected to the motor 45, the limit switch 48, the link lock release 49, and the operation unit 50. The control unit 47 is a control device that receives signals from the limit switch 48 and controls the motor 45 and the link lock release 49.

[0035] The limit switch 48 is a sensor for detecting that the first leg link 20 (see FIG. 1) and the second leg link 30 (see FIG. 1) have reached the uppermost position or the lowermost position. In this embodiment, as shown in FIG. 6, there are provided a first limit switch 48a which detects that the first leg link 20 has reached the lowermost position when struck by the first link slide 21a, and a second limit switch 48b which detects that the second leg link 30 has reached the uppermost position when struck by the second link slide 32a.

[0036] When the first leg link 20 reaches the lowest position, the first limit switch 48a sends a signal to the control unit 47, and when the second leg link 30 reaches the highest position, the second limit switch 48b sends a signal to the control unit 47. As a result, the control unit 47 stops driving the motor 45 when the first leg link 20 reaches the lowest position and when the second leg link 30 reaches the highest position.

[0037] As shown in FIG. 3 , the link lock release 49 is electrically connected to the control unit 47. The link lock release 49 is a release device for releasing a physical lock that prevents unintentional sliding between the first link slide 21 a of the first leg link 20 and the second link slide 32 a of the second leg link 30. The link lock release 49 is provided on each of the first leg link 20 and the second leg link 30, and is configured to release the lock of the first leg link 20 and the second leg link 30 under the control of the control unit 47. In other words, the control unit 47 can cause the link lock release 49 to release the lock of the first leg link 20 and the second leg link 30 before adjusting the height of the first leg link 20 and the second leg link 30.

[0038] The operating unit 50 has buttons for outputting signals to the control unit 47, and when operated by the worker, can instruct the control unit 47 to raise or lower the stretcher body 10. The operating unit 50 according to this embodiment has an up button for raising the stretcher body 10, an up stop button for stopping the raising of the stretcher body 10, a down button for lowering the stretcher body 10, and a down stop button for stopping the descent of the stretcher body 10.

[0039] As shown in FIG. 4, the lifting device 40 includes a reducer 44, a motor 45, a battery 46, and a control unit 47 provided on the back side of the stretcher body 10 at a distance from the stretcher body 10.

[0040] The lifting device 40 is equipped with a pair of unit brackets 51, 51, a pair of guide brackets 52, 52, and a battery bracket 53, and is fixed to the stretcher body 10 via these unit brackets 51, 51, guide brackets 52, 52, and battery bracket 53.

[0041] Each of the pair of unit brackets 51, 51 is composed of an upper unit bracket part 51a that abuts against the stretcher body 10 from above, and a lower unit bracket part 51b that abuts against the stretcher body 10 from below. The upper unit bracket part 51a and the lower unit bracket part 51b have arc-shaped recesses formed therein so as to fit onto two tubes extending in the lateral direction W of the stretcher body 10. The unit brackets 51, 51 are fixed to the stretcher body 10 by sandwiching the stretcher body 10 between the upper unit bracket part 51a and the lower unit bracket part 51b and joining them together using bolts.

[0042] Each of the pair of guide brackets 52, 52 is composed of an upper guide bracket portion 52a that abuts against the stretcher body 10 from above, and a lower guide bracket portion 52b that abuts against the stretcher body 10 from below. The upper guide bracket portion 52a and the lower guide bracket portion 52b have arc-shaped recesses formed therein so as to fit into two tubes extending in the lateral direction W of the stretcher body 10. The guide brackets 52, 52 are fixed to the stretcher body 10 by sandwiching the stretcher body 10 between the upper guide bracket portion 52a and the lower guide bracket portion 52b and joining them together using bolts.

[0043] The battery bracket 53 is composed of an upper battery bracket part 53a that contacts the stretcher body 10 from above, and a lower battery bracket part 53b that contacts the stretcher body 10 from below. The upper battery bracket part 53a and the lower battery bracket part 53b have arc-shaped recesses formed therein so as to fit onto two tubes extending in the longitudinal direction L of the stretcher body 10. The battery bracket 53 is fixed to the stretcher body 10 by sandwiching the stretcher body 10 between the upper battery bracket part 53a and the lower battery bracket part 53b and joining them together using bolts.

[0044] 5, the reducer 44 has a reducer bracket 44a provided on the upper part, and the reducer bracket 44a is fixed to a pair of unit brackets 51, 51 attached to the stretcher body 10. The unit brackets 51, 51 support the reducer 44 at a distance from the stretcher body 10.

[0045] The reducer bracket 44a has a support portion 44b formed therein that extends downward toward the output shaft of the reducer 44, and this support portion 44b has a through hole formed therein into which the output shaft of the reducer 44 is rotatably fitted.

[0046] As shown in FIG. 6, a pair of limit switches 48, 48 are provided on the upper portion of the reducer bracket 44a.

[0047] As shown in FIG. 4, the battery 46 is mounted between a pair of main body casters 11 that are directly attached to the stretcher main body 10. The battery 46 is placed and fixed on the upper surface of a panel 55 that is attached to the guide brackets 52 and the battery bracket 53 via first pillar members 55a, 55a attached to each of the guide brackets 52, 52, and two second pillar members 55b, 55b attached to the battery bracket 53. In other words, each of the guide brackets 52 and the battery bracket 53 supports the battery 46 with a gap between them and the stretcher main body 10. As shown in FIG. 7, a casing 56 that houses the control unit 47 is fixed to the underside of the panel 55, and the control unit 47 is placed and fixed inside the casing 56.

[0048] FIG. 8 shows a flowchart of the stretcher lift control. When the power supply of the stretcher 100 is turned on, power is supplied to the control unit 47, which goes into a standby state, and the control unit 47 executes the following processes.

[0049] First, the control unit 47 determines whether or not the worker has pressed the lift button provided on the operation unit 50, that is, whether or not the lift operation is ON (step S1).

[0050] In step S1, if it is determined that the lifting operation is ON (step S1: Yes), the control unit 47 activates the link lock release 49 to release the lock, and rotates the motor 45 in the direction of winding up the first belt 41 and the second belt 42 (step S2).

[0051] On the other hand, if it is determined in step S1 that the up operation is not ON (step S1: No), the control unit 47 determines whether the operator has pressed the down button provided on the operation unit 50, i.e., whether the down operation is ON (step S6).

[0052] In step S2, when the motor 45 is rotated in the direction of winding up the first belt 41 and the second belt 42, the control unit 47 determines whether the worker has pressed the lift stop button provided on the operation unit 50, i.e., whether the lift operation is OFF (step S3).

[0053] In step S3, if it is determined that the raising operation is OFF (step S3: Yes), the control unit 47 stops the motor 45 to stop the release of the lock by the link lock release 49 (step S5), and repeats the series of processes from step S1.

[0054] On the other hand, if it is determined in step S3 that the raising operation is not OFF (step S3: No), the control unit 47 determines whether the stretcher body 10 has reached the highest position, i.e., whether the first limit switch is ON (step S4).

[0055] In step S4, if it is determined that the first limit switch is not ON (step S4: No), the control unit 47 repeats the series of processes from step S2.

[0056] On the other hand, if it is determined in step S4 that the first limit switch is ON (step S4: Yes), the control unit 47 stops the motor 45 to stop the release of the lock by the link lock release 49 (step S5), and repeats the series of processes from step S1.

[0057] In step S6, when it is determined that the lowering operation is ON (step S6: Yes), the control unit 47 activates the link lock release 49 to release the lock, and rotates the motor 45 in the direction to unwind the first belt 41 and the second belt 42 (step S7). As a result, the stretcher body 10 is allowed to descend by its own weight.

[0058] On the other hand, if it is determined in step S6 that the lowering operation is not ON (step S6: No), the control unit 47 repeats the series of processes from step S1.

[0059] In step S7, when the motor 45 is rotated in the direction of unwinding the first belt 41 and the second belt 42, the control unit 47 determines whether or not the operator has pressed the descent stop button provided on the operation unit 50, i.e., whether or not the descent operation is OFF (step S8).

[0060] In step S8, if it is determined that the raising operation is OFF (step S8: Yes), the control unit 47 stops the motor 45 to stop the release of the lock by the link lock release 49 (step S10), and repeats the series of processes from step S1.

[0061] On the other hand, if it is determined in step S8 that the lowering operation is not OFF (step S8: No), the control unit 47 determines whether the stretcher body 10 has reached the lowest position, i.e., whether the second limit switch is ON (step S9).

[0062] In step S9, if it is determined that the second limit switch is not ON (step S9: No), the control unit 47 repeats the series of processes from step S7.

[0063] On the other hand, in step S9, if it is determined that the second limit switch is ON (step S9: Yes), the control unit 47 stops the motor 45 to stop the release of the lock by the link lock release 49 (step S10), and repeats the series of processes from step S1.

[0064] Through the above processing, the control unit 47 can control the raising and lowering of the stretcher body 10 in response to the operation of the operating unit 50 by the worker.

[0065] In addition, the control unit 47 can stop the ascending operation when the stretcher 100 reaches the uppermost position, and can stop the descending operation when the stretcher 100 reaches the lowermost position.

[0066] The stretcher 100 according to this embodiment includes a first belt 41 attached to the first leg link 20 and adjusting the height of the first leg link 20 by pulling the first leg link 20, a second belt 42 attached to the second leg link 30 and adjusting the height of the second leg link 30 by pulling the second leg link 30, a pulley 43 that winds up the first belt 41 and the second belt 42, a reducer 44 that rotates the pulley 43, a motor 45 that drives the reducer 44, a battery 46 that supplies power to the motor 45, and a control unit 47 that controls the driving of the motor 45. As a result, the stretcher 100 can electrically slide the first link slide 21a of the first leg link 20 and the second link slide 32a of the second leg link 30, thereby easily raising and lowering the stretcher body 10.

[0067] Furthermore, since the stretcher 100 does not require fasteners or other components to be attached to the ambulance vehicle, there is no need to replace the ambulance vehicle or to attach additional components to the ambulance vehicle.

[0068] Furthermore, the stretcher 100 is not too heavy, so there is no need to reduce the amount of equipment carried on board the ambulance.

[0069] Furthermore, the overall size of the stretcher 100 is almost the same as that of conventional stretchers, making it easy to handle on steep slopes, narrow roads, inside houses, etc.

[0070] Additionally, the stretcher 100 can be fitted with an anti-vibration bed, meeting high standard requirements.

[0071] Although the present invention has been described above based on the embodiments, the present invention is not limited thereto. For example, in the above embodiment, two limit switches are provided: a first limit switch 48a that detects when the first leg link 20 has reached the lowest position, and a second limit switch 48b that detects when the second leg link 30 has reached the highest position. However, the present invention is not limited thereto. The number of limit switches is not limited as long as it is possible to detect when the first leg link 20 and the second leg link 30 have reached the highest or lowest position.

[0072] In the above embodiment, the first belt 41 and the second belt are used as the string-like members for pulling the first leg link 20 and the second leg link 30, but the present invention is not limited to this. Any string-like member that can be wound up and unwound by the pulley 43, such as a wire, rope, or chain, may be used. [Explanation of symbols]

[0073] 10...Stretcher body 10a...first end 10b…Second end 11...Main body caster 20...First leg link 21...1st main link 21a…First Link Slide 22...First retaining link 23...1st Caster 30...Second leg link 31...Second main link 32...Second retaining link 32a…2nd Link Slide 33...2nd Caster 34…Caster Link 35...Sublink 40...Lifting device 40a...Reduction gear unit 41...First belt (first string-like member) 42...Second belt (second string-like member) 43...pulley 44...Reducer 44a...Reduction gear bracket 44b...Support part 45...Motor 46...Battery 47...Control unit 48...Limit switch 48a...1st limit switch 48b...Second limit switch 49...Link unlock 50...Operation unit 51...Unit bracket 51a...Upper unit bracket 51b...Lower unit bracket 52a...Upper part of guide bracket 52b...Lower guide bracket 52...Guide bracket 53...Battery bracket 53a...Upper battery bracket 53b…Bottom of battery bracket 54...Guide 55...Panel 56...Casing 55a...First pillar member 55b...Second pillar member 100...Stretcher

Claims

1. A stretcher having a first leg link and a second leg link for raising and lowering a stretcher body, a first string-like member attached to the first leg link and configured to adjust the height of the first leg link by pulling the first leg link; a second string-like member attached to the second leg link and configured to adjust the height of the second leg link by pulling the second leg link; a pulley for winding up the first string-like member and the second string-like member; a reducer that rotates the pulley; a motor that drives the reducer; a battery for supplying power to the motor; and a control unit that controls the driving of the motor.

2. 2. The stretcher of claim 1, wherein the first string member extends from the pulley toward a first end of the stretcher body, and the second string member extends from the pulley toward a second end of the stretcher body.

3. 2. The stretcher according to claim 1, wherein the first cord-like member or the second cord-like member moves while being folded back on a guide provided at a distance from the pulley.

4. 2. The stretcher according to claim 1, wherein the pulley is arranged so that the first string member and the second string member pull the first leg link and the second leg link to the uppermost position approximately simultaneously.

5. 2. The stretcher according to claim 1, wherein the reducer, the motor, and the battery are provided on the back side of the stretcher body.

6. 2. The stretcher according to claim 1, wherein the reducer, the motor, and the battery are provided at intervals from the stretcher body.

7. 2. The stretcher according to claim 1, wherein at least one of the first string-like member and the second string-like member is a belt.

8. 2. The stretcher according to claim 1, wherein the battery is provided between a pair of casters directly attached to the stretcher body.

9. 2. The stretcher according to claim 1, wherein the control unit unlocks the first leg link and the second leg link before adjusting the height of at least one of the first leg link and the second leg link.

10. 2. The stretcher according to claim 1, wherein the driving of the motor is stopped when at least one of the first leg link and the second leg link has moved to a top position.

11. 2. The stretcher according to claim 1, wherein the driving of the motor is stopped when at least one of the first leg link and the second leg link has moved to a lowest position.

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