Body transport vehicle

Abstract

To provide a personal transport vehicle which can be stopped on the spot even if the user lets go of the vehicle halfway up stairs without providing any special mechanical mechanism. The vehicle includes a fixed platform 2 on which the lower body of the person to be transported is placed, a movable platform 3 on which the upper body of the person to be transported is placed, which is rotatably connected to the fixed platform 2 so that the head side can be raised, an operation frame 4 attached to the end of the movable platform 3 on the head side, and running wheels 5 and auxiliary wheels 6 provided on the fixed platform 2. The fixed platform 2 has a sliding part 14 having a sliding surface that comes into sliding contact with the nose of the stairs when the person descends the stairs, and the lower end position of the running wheels 5 is set lower than the height position of the sliding surface of the sliding part 14. The sliding part 14 is composed of an elastic deformation layer 14a and a sliding layer 14b laminated below it, the sliding surface of which comes into sliding contact with the nose of the stairs and has slipperiness, and when the nose SN of the stairs bites into the sliding part 14 when the person descends the stairs, the elastic deformation layer 14a elastically deforms, thereby applying a braking force.

Description

[Technical field]

[0001] The present invention relates to a personal transport vehicle used to transport sick people, elderly people, and other people with walking difficulties down stairs. [Background technology]

[0002] An example of this type of personal transport vehicle is a rescue cart for people with difficulty in evacuating, which is disclosed in Patent Document 1. As shown in Fig. 19, this rescue cart for people with difficulty in evacuating (hereinafter referred to as "rescue cart") 50 is composed of a lower frame 51, an upper frame 52, an upper connecting frame 53, and a lower connecting frame 54, with an upper handle 55 provided at the upper end of the upper connecting frame 53 and a lower handle 56 provided at the rear end of the lower frame 51.

[0003] The front part of the floor surface part of the lower frame 51 is raised at an angle upward to form a front part 51a which serves as a footrest, and the front end part of the upper frame 52 is rotatably connected to the upper back part of the front part 51a. The rear end part of the upper frame 52 which is inclined so that the rear part becomes gradually higher is rotatably connected to the middle part of the upper connecting frame 53, and the lower end part of the lower connecting frame 54 is rotatably connected to the rear part of the lower frame 51.

[0004] A seat 57 made of fabric is provided on the upper part of the lower frame 51. A pair of left and right wheels 58 are attached below the front part 51a of the lower frame 51. Also, a sliding body 59 is attached to the underside of the lower frame 51. The sliding body 59 is made of a front sled 59a made of a sliding material, two rear sleds 59b made of a friction material, and a protector 59c that connects the front sled 59a and the rear sled 59b and protects the tip end of the rear sled 59b.

[0005] In addition, temporary stop mechanisms 60, which are used to prevent the vehicle from going too far when starting to descend the stairs from the landing and which are used when it becomes necessary to stop temporarily while traveling down the stairs, are attached to the left and right sides close to the tip of the rear sled 59b of the lower frame 51, as shown in the same figure.

[0006] As shown in FIG. 20, the temporary stop mechanism 60 comprises a pair of roller frames 60a attached to the left and right sides adjacent to the tip of the rear sled 59b of the lower frame 51, a pair of swing arms 60c attached to the left and right sides and having rollers 60b attached to their tip ends, the base ends of which are swingably supported by the pair of roller frames 60a via a rotating shaft 60d, a band-like friction belt 60e made of a material having friction and elasticity and moved forward and backward by the rollers 60b at the bottom of the roller frames 60a, a hook 60f attached to one end of the rotating shaft 60d, and a hook 60f attached to one end of the rotating shaft 60d between the front portion 51a and the seat 57. The vehicle is equipped with a hook 60h provided on the flat front floor portion 51b having a floor plate attached thereto, a spring 60g which urges the roller 60b upward and has one end hooked to the tip of the hook 60f and the other end hooked to the hook 60h, a brake lever 60j with a lock attached to the lower handle 56, and a wire cable 60i which connects the middle part of the hook 60f and the brake lever 60j. By pulling the brake lever 60j, the roller 60b is swung to cause the friction band 60e to protrude from the underside of the rear sled 59b.

[0007] The rescue cart 50 configured as above is used as follows. First, as shown in Fig. 21, with the person in need of rescue placed on the seat 57, the rescue cart 50 is lifted by holding the lower handle 56, and transported using the wheels 58. As shown in Fig. 22, when the rescue cart 50 approaches the stairs of the landing z, the rescue cart 50 is turned perpendicular to the stairs, and while holding the lower handle 56 with the left hand, the brake lever 60j is pulled with the right hand to extend the friction belt 60e of the temporary stop device 60, and while holding the lower handle 56 with both hands, the rescue cart enters the stairs and begins to slide down the stairs using the front sled 59a, when the friction belt 60e hits the stair nosing y and stops temporarily. When the brake lever 60j is released while the rescue cart 50 is stopped, and the rescue cart 50 is pushed downward by switching from the lower handle 56 to the upper handle 55, the front sled 59a slides down the stairs, and when the rescue cart is pushed downward, the friction material of the rear sled 59b applies the brakes, and the cart descends while repeatedly sliding and braking. Then, when the wheels land on the next landing, the rescue cart 50 is transferred from the upper handle 55 to the lower handle 56, and the wheel 58 is used to change direction on the landing while entering the next staircase, and the same operations as those described above are repeated to descend the stairs.

[0008] Furthermore, if an obstacle appears ahead on the way up the stairs and it becomes necessary to remove it, or if it becomes necessary to stop traveling and move away from the rescue cart 50, the brake lever 60j can be pulled and locked, and the friction band 60e can be kept protruding from the underside of the rear sled 59b to stop it permanently. [Prior art documents] [Patent documents]

[0009] [Patent Document 1] JP 2018-68623 A Summary of the Invention [Problem to be solved by the invention]

[0010] In the above-mentioned rescue cart 50, if it is necessary to let go of the rescue cart 50 in the middle of the stairs, the brake lever 60j can be pulled and locked to stop the rescue cart 50 continuously. However, in order to realize such a function, as described above, it is necessary to provide a temporary stop mechanism 60 that causes the band-shaped friction band 60e to protrude downward from the underside of the rear sled 59b, which poses a problem that the structure of the rescue cart 50 becomes complicated.

[0011] It is therefore an object of the present invention to provide a personal transport vehicle that can be stopped in place even if the user lets go of the vehicle halfway up the stairs, without the need for such special mechanical mechanisms. [Means for solving the problem]

[0012] In order to solve the above problems, the invention of claim 1 provides a body transport vehicle comprising: a fixed platform on which the lower body of the person to be transported is placed; a movable platform on which the upper body of the person to be transported is placed, the movable platform being rotatably connected to the fixed platform so that the head side can be raised; and running wheels provided on the fixed platform, wherein the fixed platform has a sliding part having a sliding surface that comes into sliding contact with the nosing of the staircase when the person is descending the stairs, the lower end position of the running wheels is set lower than the height position of the sliding surface of the sliding part, the sliding part has a sliding surface that is slippery and has an elastic deformation layer above the sliding surface that is elastically deformable, and when the person is descending the stairs, the nosing of the staircase bites into the sliding part, applying a braking force.

[0013] In addition, the invention according to claim 2 is characterized in that, in the personal transport vehicle of the invention according to claim 1, an operation frame is attached to the movable platform so that the mounting angle relative to the movable platform can be changed.

[0014] Furthermore, the invention of claim 3 is characterized in that, in the human transport vehicle of the invention of claim 1 or 2, the running wheels are provided with a pair of side wheels arranged on both sides of the fixed platform, and the side wheels have a rotating body having a plurality of arms extending radially from a center of rotation and rotatably attached to both sides of the fixed platform, and wheels attached to the tip of each arm of the rotating body.

[0015] The invention according to claim 4 is Section 3 In the body transport vehicle of the invention relating to the above, the running wheels are equipped with a central wheel arranged in the center of the width of the fixed platform, and the central wheel has a rocking body extending in the front-to-rear direction of the fixed platform and attached to the center of the width of the fixed platform so as to be able to rock, and wheels attached respectively to the front and rear of the rocking axis of the rocking body, and the rocking body is configured to be able to rock so that one of the wheels can be retracted from the sliding surface of the sliding part of the fixed platform.

[0016] The invention according to claim 5 is Section 4 In the personal transport vehicle of the invention, a pair of left and right auxiliary wheels which are the first to touch the landing when descending the stairs are attached to the front end of the fixed platform, and the lower end positions of the auxiliary wheels are set higher than the height position of the sliding surface of the sliding part. Effect of the Invention

[0017] As described above, in the personal transport vehicle of the invention according to claim 1, the fixed platform has a sliding part with a sliding surface that slides against the stair nosing when the vehicle descends the stairs, and the sliding part has a sliding surface and an elastically deformable layer on the upper side of the sliding surface, so that the stair nosing bites into the sliding part when the vehicle descends the stairs, and a braking force is applied when the vehicle descends the stairs, so that when the vehicle descends the stairs, the carrier simply lightly pushes the personal transport vehicle forward along the stairs to easily descend along the stairs, and even if the carrier releases his or her hands from the personal transport vehicle when descending the stairs, the stair nosing bites into the sliding part, and a braking force is applied, so that the personal transport vehicle can be stopped on the spot. Therefore, unlike conventional personal transport vehicles, there is no need to provide a special mechanical mechanism for temporarily stopping the personal transport vehicle when descending the stairs, and the structure can be simplified.

[0018] In addition, the human body transport vehicle of the invention according to claim 2 has an operating frame attached to the movable platform so that the mounting angle relative to the movable platform can be changed. Therefore, by changing the mounting angle of the operating frame to suit the physique of the person being transported, the human body transport vehicle can be driven in a comfortable posture.

[0019] In addition, the body transport vehicle of the invention of claim 3 is equipped with a pair of side wheels arranged on both sides of the fixed platform, and these side wheels have a rotating body with multiple arms extending radially from a center of rotation that is rotatably attached to both sides of the fixed platform, and a wheel attached to the tip of each arm of the rotating body.Therefore, when the side wheels pass over the nosing of the stairs when descending stairs, the multiple wheels retract alternately, allowing the body transport vehicle to descend the stairs while suppressing rattling.

[0020] In addition, the body transport vehicle of the invention of claim 4 is equipped with a central wheel whose running wheels are arranged in the center of the width of the fixed platform, and this central wheel has a rocking body extending in the front-to-rear direction of the fixed platform and which is swingably attached to the center of the width of the fixed platform, and wheels are attached to the front and rear of the rocking axis of the rocking body, and when the rocking body swings, one of the wheels can be retracted from the sliding surface of the sliding part of the fixed platform.Therefore, when the central wheel passes over the nose of the stairs when descending stairs, the front and rear wheels are pushed up alternately by the nose and retracted from the sliding surface of the sliding part of the fixed platform, allowing the body transport vehicle to descend the stairs while suppressing rattling.

[0021] In addition, in the personal transport vehicle of the invention according to claim 5, a pair of left and right auxiliary wheels which are the first to touch the landing when descending the stairs are attached to the front end of the fixed platform, and the lower end positions of these auxiliary wheels are set higher than the height position of the sliding surface of the sliding part. Therefore, when the auxiliary wheels pass over the nose of the stairs when descending the stairs, they do not come into contact with the nose of the stairs, and no wobbling caused by the auxiliary wheels occurs. [Brief description of the drawings]

[0022] [Figure 1] 1 is a perspective view showing one embodiment of a personal transport vehicle according to the present invention; [Diagram 2] FIG. [Diagram 3] FIG. [Figure 4] FIG. [Diagram 5] FIG. [Figure 6] FIG. 3 is a cross-sectional view taken along line XX in FIG. [Figure 7] FIG. 5 is a cross-sectional view taken along line XX in FIG. [Figure 8] FIG. 2 is a plan view showing the state in which the seat mat, back mat, headrest, base plate and sliding part have been removed from the above-mentioned personal transport vehicle. [Figure 9]FIG. 13 is an explanatory diagram showing a state in which the nose of a staircase is embedded in a sliding portion constituting the above-mentioned personal transport vehicle. [Figure 10] FIG. 2 is a perspective view showing a central wheel constituting the above-mentioned personal transport vehicle. [Figure 11] 13A and 13B are explanatory diagrams showing the transition from corridor transport to stair transport in the above-mentioned personal transport vehicle. [Figure 12] 13A and 13B are explanatory diagrams showing the transition from corridor transport to stair transport in the above-mentioned personal transport vehicle. [Figure 13] 4A and 4B are explanatory diagrams of the operation of the side wheels when the above-mentioned personal transport vehicle is transported up stairs. [Figure 14] 13(a) and 13(b) are explanatory diagrams of the operation of the side wheels when the above-mentioned personal transport vehicle is transported up stairs. [Figure 15] 13A and 13B are explanatory diagrams illustrating the operation of the central wheels when the above-mentioned personal transport vehicle is transported up stairs. [Figure 16] 13(a) and 13(b) are explanatory diagrams illustrating the operation of the central wheels when the above-mentioned personal transport vehicle is transported up stairs. [Figure 17] 13A and 13B are explanatory diagrams showing the transition from stair transport to landing transport of the above-mentioned personal transport vehicle. [Figure 18] FIG. 4 is an explanatory diagram showing the transition operation from stair transport to landing transport of the above personal transport vehicle. [Figure 19] FIG. 1 is a side view of a conventional patient transport vehicle. [Figure 20] FIG. 2 is an enlarged cross-sectional view showing a temporary stop mechanism constituting the above-mentioned personal transport vehicle. [Figure 21] FIG. 2 is an explanatory diagram showing how to use the above-mentioned personal transport vehicle. [Figure 22] FIG. 2 is an explanatory diagram showing how to use the above-mentioned personal transport vehicle. [Diagram 23] FIG. 2 is an explanatory diagram showing how to use the above-mentioned personal transport vehicle. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0023] Hereinafter, an embodiment will be described with reference to the drawings. As shown in Fig. 1 to Fig. 8, this personal transport vehicle 1 includes a fixed platform 2 on which the lower body of the person to be transported is placed, a movable platform 3 on which the upper body of the person to be transported is placed and which is rotatably connected to the fixed platform 2 so that the head side can be raised, a gate-shaped operation frame 4 attached to the end of the head side of the movable platform 3, and running wheels 5 and auxiliary wheels 6 provided on the fixed platform 2.

[0024] The fixed support base 2 comprises a metal base frame 11, a base plate 12 attached to the upper surface of the base frame 11, a cushioned sheet mat 13 attached to the top of the base plate 12, and a mat-shaped sliding part 14 attached to the underside of the base frame 11, and the sliding part 14 moves while sliding against the nosing of the stairs when descending the stairs.

[0025] The base plate 12 is divided into a fixed plate 12a that supports the buttocks of the person to be transported, a rear movable plate 12b that supports the thighs of the person to be transported, and a front movable plate 12c that supports the part of the person below the knees. The fixed plate 12a is fixed to the rear of the base frame 11, and the fixed plate 12a, the rear movable plate 12b and the front movable plate 12c are connected in sequence via hinges.

[0026] The rear movable plate 12b has the central portion in the fore-aft direction on both sides connected to the front of the base frame 11 via a pair of left and right stays 12d that are extendable and can be locked and unlocked in an extended position, and when the stays 12d are locked in the extended position, the front end is held in a raised position.

[0027] Therefore, when the stay 12d is locked in the extended position, the rear movable plate 12b rises obliquely upward toward the front, and the front movable plate 12c rises obliquely upward toward the rear, so that the legs of the person to be conveyed who sits down on the fixed plate 12a are supported in a knee-up state by the rear movable plate 12b and the front movable plate 12c which rise in a mountain shape. On the other hand, when the stay 12d in the extended state is unlocked, the stay 12d becomes contractible and can push down the front end side of the rear movable plate 12b, so that the rear movable plate 12b and the front movable plate 12c which rise in a mountain shape can be made flat.

[0028] The seat mat 13 is fixed to a fixed plate 12a, a rear movable plate 12b, and a front movable plate 12c, which are connected to each other, and is configured to be bendable at the connection portion between the fixed plate 12a and the rear movable plate 12b and the connection portion between the rear movable plate 12b and the front movable plate 12c.

[0029] The sliding portion 14 is composed of an elastically deformable elastic deformation layer 14a made of expanded polyethylene and a sliding contact layer 14b laminated underneath, the sliding contact surface of which is made of polyester brushed suede with slippery properties and comes into sliding contact with the stair nosing. As shown in Figure 9, when the stair nosing SN bites into the sliding portion 14 during descent of the stairs, the elastic deformation layer 14a elastically deforms, thereby applying a braking force.

[0030] The movable platform 3 comprises a metal base frame 21, a base plate 22 attached to the base frame 21, a cushioned back mat 23 and a headrest 24 attached to the top of the base plate 22, and a mat-like sliding part 25 attached to the underside of the base frame 21 which moves while sliding against the nosing of the stairs when descending the stairs, and the front end of the base frame 21 is connected to the rear end of the base frame 11 of the fixed platform 2 via a number of hinges so that it can be rotated (raised and lowered).

[0031] The sliding part 25, like the sliding part 14, is composed of an elastically deformable elastic deformation layer 25a made of foamed polyethylene and a sliding contact layer 25b laminated on the lower side thereof, the sliding contact surface which comes into sliding contact with the stair nosing being formed of polyester brushed suede having slippery properties. When the stair nosing bites into the sliding part 25 during descent of the stairs, a braking force is applied like the sliding part 14.

[0032] The operation frame 4 consists of a pair of left and right vertical frames 31a, 31a and two upper and lower horizontal frames 31b, 31b connecting the two vertical frames 31a, 31a. The operation frame 4 is equipped with a frame main body 31 whose lower ends are rotatably supported on the rear end of the base frame 21 of the movable mounting table 3, a pair of left and right links 32, 32 whose one end is rotatably connected to the lower middle part of the vertical frame 31a of the frame main body 31 and whose other end is movably connected in the front-to-rear direction forward of the rotation fulcrum of the frame main body 31 on the base frame 21 of the movable mounting table 3, and fixing units 33, 33 that gradually fix the other ends of the pair of left and right links 32, 32 to a plurality of positions within their movement range. By changing the fixing positions of the other ends of the pair of left and right links 32, 32, the mounting angle of the frame main body 31 relative to the movable mounting table 3 can be gradually changed within a predetermined range.

[0033] The running wheels 5 include a pair of left and right side wheels 5a arranged on both sides of the rear end of the fixed platform 2, and a central wheel 5b arranged in front of the side wheels 5a in the center of the width of the fixed platform 2, and are designed to come into contact with the ground when transporting the platform on a flat surface such as a corridor.

[0034] The side wheels 5a have a rotating body 41 with three arms extending radially from a center of rotation, which is rotatably attached to both sides of the rear end of the fixed support base 2, and wheels 42 rotatably attached to the tip of each arm of the rotating body 41.On a flat surface such as a corridor, as shown in Figure 4, the two wheels 42, 42 come into contact with the ground, and their contact positions are set to be lower than the height position of the sliding surface of the sliding part 14.

[0035] As shown in Fig. 3, Fig. 6 to Fig. 8 and Fig. 10, the central wheel 5b has a rocking body 44 extending in the front-rear direction of the fixed stand 2 and pivotally supported via a bracket 43 at the center of the width direction of the base frame 11 of the fixed stand 2, a pair of casters 45, 45 attached to the front and rear of the rocking shaft 44a of the rocking body 44, and a pair of coil springs 46, 46 attached to the front of the rocking body 44 and the other end of the rocking body 44, the front and rear ends of the rocking body 44 move up and down, and the pair of coil springs 46, 46 constantly urge the front end side of the rocking body 44 upward. An opening O is formed in the sliding part 14 in an area corresponding to the central wheel 5b, and the pair of casters 45, 45 protrude from the opening O.

[0036] On a flat surface such as a corridor, as shown in Figure 4, the rear side of the oscillating body 44 is pushed up against the force of the coil spring 46, so that both the front and rear casters 45, 45 come into contact with the ground at the same time, and the ground contact positions of the two casters 45, 45 are set lower than the height position of the sliding surface of the sliding part 14 and at the same height as the ground contact positions of the two wheels 42, 42 of the side wheels 5a.

[0037] The auxiliary wheels 6 are attached to both sides of the front end of the fixed support platform 2 so that they touch the landing first when descending the stairs, and the positions of the lower ends of the auxiliary wheels 6 are set higher than the height position of the sliding contact surface of the sliding part 14. Therefore, when descending the stairs while sliding the sliding parts 14, 25 against the stair nosing, the auxiliary wheels 6 do not come into contact with the stair nosing when passing over the stair nosing, and no rattling caused by the auxiliary wheels 6 occurs.

[0038] Hereinafter, a method of transporting a person to be transported from an upper floor to a lower floor via a landing of the stairs using this personal transport vehicle 1 will be described. First, as shown in Fig. 11(a), the mounting angle of the operation frame 4 relative to the movable platform 3 is adjusted according to the physique of the person to be transported (not shown), and the person to be transported (not shown) is placed on the personal transport vehicle 1, and the person to be transported holds and lifts the horizontal frame 31b of the operation frame 4 to lift the movable platform 3 slightly relative to the fixed platform 2, and while pushing the personal transport vehicle 1, the vehicle is transported along the corridor CD toward the stairs. At this time, as described above, the two wheels 42, 42 of the pair of left and right side wheels 5a, which are the running wheels 5, and the front and rear casters 45, 45 of the central wheel 5b are simultaneously in contact with the ground, and the sliding surfaces of the auxiliary wheels 6 and the sliding parts 14 are slightly raised from the corridor surface, so that the personal transport vehicle 1 can be smoothly driven.

[0039] As shown in Figure 1(b), after the auxiliary wheels 6 have passed over the nosing SN of the top step of the downward stairs which is flush with the corridor surface, the personal transport vehicle 1 is stopped before the swivel caster 45 in front of the central wheel 5b passes over the nosing SN of the top step of the downward stairs, and the movable platform 3 is tilted flat to place the person being transported completely lying down. Then, as shown in Figure 12(a), the personal transport vehicle 1 is moved until the front wheel 42 of the side wheel 5a which is in contact with the ground is positioned at the nosing SN of the top step of the downward stairs. Then, as shown in Figure 12(b), the personal transport vehicle 1 with the person being transported completely lying down is tilted forward so that the sliding surface of the sliding part 14 comes into contact with the multiple nosings SN of the stairs, and the person descends the stairs.

[0040] The sliding surfaces of the sliding layers 14b, 25b of the sliding parts 14, 25 have slipperiness, so that when descending stairs, the carrier simply needs to lightly push the personal transport vehicle 1 forward along the stairs, and the personal transport vehicle 1 can easily descend along the stairs. In addition, the elastic deformation layers 14a, 25a are laminated on the upper side of the sliding layers 14b, 25b, so that when the nose of the staircase bites into the sliding parts 14, 25, the elastic deformation layers 14a, 25a elastically deform, thereby applying a braking force. This braking force allows the personal transport vehicle 1 to stop in place even if the carrier lets go of the personal transport vehicle 1 when descending the stairs.

[0041] On flat surfaces such as corridors, the two wheels 42, 42 of the side wheels 5a protrude below the sliding surfaces of the sliding parts 14, 25 so that the sliding surfaces of the sliding parts 14, 25 do not come into contact with each other. Therefore, when descending stairs, where the sliding parts 14, 25 are in sliding contact with the nosing of the stairs, the wheels 42 of the side wheels 5a come into contact with the stairs. However, as shown in Figures 13(a) and (b) and Figures 14(a) and (b), when the personal transport vehicle 1 descends along the nosing SN of the stairs, the wheels 42 in contact with the stairs are pushed by the stairs and the rotating body 41 rotates counterclockwise, and when the wheels 42 in contact with the stairs pass the nosing of the stairs, as shown in Figure 14(a), the wheels 42 move above the sliding surfaces of the sliding parts 14, 25 and retreat from the sliding surfaces (no longer protrude), so that the personal transport vehicle 1 can descend the stairs without lifting up and with reduced rattling.

[0042] Furthermore, as shown in Figures 15(a) and 16(b), when the central wheel 5b is not in contact with the stairs, both the front and rear casters 45, 45 protrude from the sliding surface of the sliding section 14; however, as shown in Figure 15(b), when the front caster 45 comes into contact with the stair nosing SN, the front end of the oscillating body 44 is pushed up by the stair nosing SN, and the front caster 45 retreats from the sliding surface of the sliding section 14; and as shown in Figure 16(a), when the rear caster 45 comes into contact with the stair nosing SN, the rear end of the oscillating body 44 is pushed up by the stair nosing SN, and the rear caster 45 retreats from the sliding surface of the sliding section 14. Therefore, when the casters 45, 45 pass over the stair nosing SN, the personal transport vehicle 1 does not lift up, and can descend the stairs with reduced rattling.

[0043] As shown in Figure 17(a), when the auxiliary wheels 6 of the personal transport vehicle 1 come into contact with the landing LS, the operating frame 4 is operated to gradually raise the movable platform 3 relative to the fixed platform 2, as shown in Figure 17(b), and the vehicle is lowered down the stairs until the central wheels 5b and side wheels 5a touch the landing LS.

[0044] As shown in Figure 18, when the central wheels 5b and side wheels 5a of the body transport vehicle 1 touch the landing LS, the movable platform 3 is further raised relative to the fixed platform 2, shortening the overall length of the body transport vehicle 1, and the body transport vehicle 1 changes direction at the landing LS so that the front of the body transport vehicle 1 faces the descending stairs.After that, the body transport vehicle 1 descends until the central wheels 5b and side wheels 5a touch the corridor below, performing the same operations as when descending the stairs from the upper floor corridor CD to the landing LS, and then the body transports the body along the corridor below to the destination.

[0045] As described above, even if the carrier lets go of the body transport vehicle 1 when descending the stairs, the nosing of the stairs will bite into the sliding parts 14, 25, applying a braking force that stops the body transport vehicle 1 in place. Therefore, unlike conventional body transport vehicles, there is no need to provide a special mechanical mechanism to temporarily stop the body transport vehicle when descending the stairs, simplifying the structure.

[0046] In addition, since the operation frame 4 is attached to the movable platform 3 so that the mounting angle of the operation frame 4 can be changed, the personal transport vehicle 1 can be driven in a comfortable posture by changing the mounting angle of the operation frame 4 according to the physique of the person being transported.

[0047] In the above-described embodiment, sliding parts 14, 25 are used, which are composed of elastic deformation layers 14a, 25a made of expanded polyethylene and sliding contact layers 14b, 25b laminated underneath and formed of polyester brushed suede with a sliding surface that slides against the stair nosing. However, this is not limited to this, and various elastically deformable materials can be used for the elastic deformation layers 14a, 25a, and various materials with a sliding surface can be used for the sliding contact layers 14b, 25b.

[0048] In addition, in the above-described embodiment, sliding parts 14, 25 are provided on both the fixed platform 2 and the movable platform 3, but this is not limited to this. As long as the movable platform 3 is raised relative to the fixed platform 2 and only the fixed platform 2 is lowered while sliding against the nosing of the stairs, as in the case of running on a flat surface such as a corridor, it is not necessarily necessary to provide a sliding part on the movable platform 3.

[0049] In addition, in the above-described embodiment, running wheels 5 are provided for use when transporting the stroller on flat surfaces such as corridors, but as long as the stroller can be transported smoothly while keeping the sliding part 14 in sliding contact with the flat surface when transporting the stroller on flat surfaces such as corridors, similar to when descending stairs, there is no need to provide running wheels 5.

[0050] In addition, in the above-described embodiment, when the wheels 42 of the side wheels 5a and the swivel casters 45 of the central wheels 5b that constitute the running wheels 5 pass over the stair nosing SN when descending the stairs, the wheels 42 and the swivel casters 45 are adapted to retract from the sliding surface of the sliding portion 14; however, this is not limited to this, and as long as some rattling can be tolerated, the running wheels may be configured not to retract from the sliding surface of the sliding portion 14 when passing over the stair nosing SN.

[0051] In addition, in the above-described embodiment, in addition to the side wheels 5a and central wheels 5b which are the running wheels 5, the auxiliary wheels 6 which first come into contact with the landing LS are provided, but this is not limited to this, and instead of the auxiliary wheels 6, it is also possible to adopt a sliding member which allows the personal transport vehicle 1 to slide in the forward and backward directions while in contact with the landing. [Industrial Applicability]

[0052] The present invention can be used when transporting sick people, elderly people, or other people who have difficulty walking down a flight of stairs. [Explanation of symbols]

[0053] 1. Body Transport Vehicle 2 Fixed mounting table 3 Movable mounting table 4 Operation Frame 5. Traveling wheels 5a Side wheels 5b central wheel 6 Auxiliary wheels 11 Base frame 12 Base plate 12a Fixing plate 12b Rear movable plate 12c Front movable plate 12d Stay 13 Seat Mat 14 Sliding part 14a Elastic deformation layer 14b Sliding layer 21 Base Frame 22 Base plate 23 Back Mat 24 Headrest 25 Sliding part 25a Elastic deformation layer 25b Sliding layer 31 Frame body 31a Vertical frame 31b Horizontal frame 32 Links 33 Fixed Unit 41 Rotating Body 42 wheels 43 Bracket 44 Rocking Body 44a Swing shaft 45 Swivel Caster 46 Coil spring O opening CD Corridor SN Nosing LS Landing

Claims

1. A fixed platform on which the lower body of the person to be transported is placed; a movable platform on which the upper body of the person to be transported is placed, the movable platform being rotatably connected to the fixed platform so that the head side of the person to be transported can be raised; A running wheel provided on the fixed stand; Equipped with The fixed mounting base has a sliding portion having a sliding contact surface that comes into sliding contact with the nose of the staircase when the staircase descends, The lower end position of the running wheel is set lower than the height position of the sliding surface of the sliding part, The sliding portion has a sliding surface and an elastic deformation layer that is elastically deformable on an upper side of the sliding surface, This personal transport vehicle is characterized in that when descending stairs, the nose of the stairs bites into the sliding portion, thereby applying a braking force.

2. 2. The personal transport vehicle according to claim 1, wherein an operation frame is attached to the movable platform such that an attachment angle with respect to the movable platform can be changed.

3. The running wheels include a pair of side wheels respectively disposed on both sides of the fixed stand, The side wheels of the body transport vehicle described in claim 1 or 2 include a rotating body having a plurality of arms extending radially from a center of rotation and rotatably attached to both sides of the fixed platform, and wheels attached to the tip of each arm of the rotating body.

4. The running wheels include a central wheel disposed at a central portion of the fixed mounting base in a width direction, the central wheel includes a rocking body that is rockably attached to a central portion of the fixed mounting base in a width direction and extends in a front-rear direction of the fixed mounting base, and wheels that are attached to the front and rear of a rocking shaft of the rocking body, 4. The personal transport vehicle according to claim 3, wherein the rocking body is rocked so that one of the wheels can be retracted from the sliding contact surface of the sliding portion of the fixed platform.

5. A pair of left and right auxiliary wheels that first touch the landing when descending the stairs are attached to the front end of the fixed platform, 5. A personal transport vehicle according to claim 4, wherein the lower ends of the auxiliary wheels are set higher than the height of the sliding contact surfaces of the sliding parts.

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