Transfer support device

Abstract

To provide a transfer support device that eliminates a step and facilitates transfer with a small and lightweight configuration.SOLUTION: A transfer support device includes: a base part 4 that holds a device body part; a pair of support rod parts 5 that are erected upward from the base part 4; a seat part 8 that is attached to the support rod parts 5 slidably in a vertical direction and has a seat surface part 6 and a backrest part 7; and a linear actuator 9 that changes a height position of the seat part 8 with respect to the base part 4. An inclination angle φ formed by the support rod parts 5 with respect to a perpendicular line 30 of the base part 4 is set to a rearward inclination angle of equal to or greater than 0° and equal to or less than 15°.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present invention relates to a transfer assistance device. [Background technology]

[0002] Various configurations have been proposed for transfer assistance devices for people requiring care or wheelchair users. For example, Patent Document 1 discloses a mobility assistance device that includes a sliding mechanism that slides a smooth plate in an approximately horizontal direction and a lifting mechanism, displacing the smooth plate to the transfer destination and allowing the user to slide on the smooth plate to the transfer destination.

[0003] Furthermore, Patent Document 2 discloses a mobility assistance device that includes a bridging member that is extended to the transfer destination and a bridging member drive unit that extends or retracts the bridging member, and states that it can assist the care recipient when transferring to a bed, chair, etc. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2011-092446 [Patent Document 2] Japanese Patent Application Publication No. 2019-187919 Summary of the Invention [Problem to be solved by the invention]

[0005] When wheelchair users go out, steps at the entrance are a major barrier. In many cases, they have to renovate their homes to remove the steps, or they use temporary ramps or wheelchair lifts. While a permanent wheelchair lift installed on the dirt floor is ideal, there are cases where space constraints or the user's living environment make it impossible to install one. In such cases, a temporary ramp must be set up and removed each time the user goes out and returns home, requiring a great deal of effort.

[0006] In particular, it is often not possible to permanently install a ramp for entrance steps. Furthermore, conventional transfer assistance devices are generally large and heavy. For example, the configurations of Patent Documents 1 and 2 are equipped with a mechanism that protrudes the board on which a person can stand in one direction, making them less flexible for responding to individual situations and expected to be difficult to handle in a narrow entrance hallway.

[0007] The present invention has been made to solve the above problems. An object of the present invention is to provide a transfer assistance device that is small and lightweight, eliminates steps, and allows for easy transfer. Another object of the present invention is to provide a transfer assistance device that is suitable for permanent installation at the boundary between the inside and outside of a home, such as at the entrance, to eliminate the step between the inside and outside of the home. [Means for solving the problem]

[0008] A transfer assistance device according to a first aspect of the present invention comprises: a base portion that holds the device main body portion; a pair of support rods extending upward from the base; a seat portion attached to the support rod portion so as to be slidable in the up and down direction and including a seat surface portion and a backrest portion; a linear actuator that changes the height position of the seat portion relative to the base portion; and The tilt angle φ that the support rod portion makes with a line perpendicular to the base portion is set to a rearward tilt angle of 0° or more and 15° or less.

[0009] A second aspect of the present invention is the transfer assistance device according to the first aspect, The support rod portion has a front upright rod portion provided at a front position, a rear upright rod portion provided at a rear position, and a support rod connection portion that connects the front upright rod portion and the rear upright rod portion in an upper region, and is characterized in that a slide portion provided in the seat portion is slidably attached to the front upright rod portion.

[0010] A third aspect of the present invention is a transfer assistance device according to the second aspect, characterized in that a seat-side standing portion is provided at a rear position of the seat portion, and the sliding portion is fixed to the seat-side standing portion.

[0011] A fourth aspect of the present invention is the transfer assistance device according to any one of the first to third aspects, The base portion is composed of a base plate portion having a flat base, It is characterized by having a front-to-rear width of 500 mm or more and 1000 mm or less, and a width of 400 mm or more and 600 mm or less. A fifth aspect of the present invention is a transfer assistance device according to any one of the first to third aspects, characterized in that friction-improving surface portions are formed at the left and right lateral positions on the upper surface of the seat portion.

[0012] A sixth aspect of the present invention is a transfer assistance device according to any one of the first to third aspects, characterized in that the seat portion is configured in a flat shape with no obstacles on three sides: the front, left, right, and side. A seventh aspect of the present invention is a transfer assistance device according to any one of the first to third aspects, characterized in that the base part is placed at the boundary between the inside and outside of a home and is used to eliminate the step at the boundary part. [Effects of the Invention]

[0013] The present invention provides a transfer assistance device that is small and lightweight, eliminates steps, and makes transfers easy. It also provides a transfer assistance device that is suitable for permanent installation at the boundary between the inside and outside of a home, such as at the entrance, to eliminate steps between the inside and outside of a home. [Brief explanation of the drawings]

[0014] [Figure 1] 1 is a perspective view of a transfer assistance device according to a first embodiment, with a seat portion positioned downward, as viewed from the front right. [Figure 2]1 is a perspective view of a transfer assistance device according to a first embodiment, with the seat portion positioned in an upper position, as viewed from the front right. [Figure 3] 1 is a perspective view of a transfer assistance device according to a first embodiment, seen from the right rear. [Figure 4] 1 is a side view of the transfer assistance device according to the first embodiment, with the seat portion positioned downward. FIG. [Figure 5] 1 is a side view of the transfer assistance device according to the first embodiment, with the seat portion positioned in an upper position. [Figure 6] FIG. 11 is a perspective view of a transfer assistance device according to a second embodiment, with the seat portion positioned downward, as viewed from the right rear. [Figure 7] FIG. 11 is a perspective view of a transfer assistance device according to a second embodiment, seen from the right rear, with the seat portion positioned in an upper position. DETAILED DESCRIPTION OF THE INVENTION

[0015] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A transfer assistance device according to one embodiment of the present invention will now be described with reference to the drawings. The transfer assistance device described in this embodiment is a transfer lift (step-eliminating device) that is permanently installed at the side of the entrance or the like (inside a house) and used.

[0016] [First embodiment] The transfer assistance device 1 has a base 4 that is placed at a predetermined position such as an entrance, and a device main body 2. In this embodiment, the device main body 2 is shown as an example having a support rod 5 that stands upright from the base 4, a seat 8 that moves up and down along the support rod 5, a linear actuator 9 as a driving means, and a motor as a driving source 11.

[0017] In this specification, as shown in Fig. 1, when the person requiring care is seated on the seat 8, the direction facing forward is the forward direction, and the opposite direction is the rearward direction, and these are referred to as the front-to-rear direction (X direction in Fig. 1). The width direction perpendicular to the front-to-rear direction is referred to as the lateral direction (Y direction in Fig. 1). The direction perpendicular to both the front-to-rear and lateral directions is referred to as the height direction or up-down direction of this device (Z direction in Fig. 1). The right and left directions are based on the direction as seen from the rear.

[0018] <Base part 4> The base 4 is a member for stably holding the device main body 2 on an installation surface 3 such as the dirt floor of an entrance hall. The base 4 is made of a member having a shape and size that can hold the device main body 2. The base 4 is often made of a material such as metal or high-strength synthetic resin.

[0019] The base ends of the linear actuator 9, drive source 11, and support rod 5 are provided in the rear half of the base 4. In particular, by providing the base end of the support rod 5 in the rear half, the shape of the portion consisting of the base 4, support rod 5, and seat 6 can be made U-shaped in side view. By making it U-shaped, the weight of the user acting on the seat 6 becomes a force that presses the installation surface 3 downward across the entire surface of the base 4 via the support rod 5, and the small area of ​​the base 4 can firmly support the weight of the user.

[0020] The length of the base 4 in the front-to-rear direction (front-to-rear width) is preferably set to 500 mm or more and 1000 mm or less, and the width is preferably set to 400 mm or more and 600 mm or less. With a size of this order, it can be permanently installed even in a small boundary area. The base portion 4 is preferably configured with a flat base plate portion 33 as shown in Fig. 1. In particular, it is preferably configured with a base plate portion 33 that is substantially square or substantially rectangular, close to a square, in plan view.

[0021] However, the present invention does not exclude the base portion 4 being configured with a pair of flat base plates on both the left and right ends. In this case, the pair of left and right base plates is configured by removing the central region in the left-right direction in the front half region of the base portion 4 to an extent that does not reduce stability.

[0022] <Support rod part 5> As shown in FIGS. 3 to 5, the support rod 5 is a support part that stands upright from the base 4 and is a member made of a pipe or the like. The support rod 5 is provided with a slide portion 22 that supports the seat 8 while allowing it to slide up and down. In this embodiment, the slide portion 22 is configured by a pair of lower slide portions 23 provided on the rear end surface of the seat cushion 6 and a pair of upper slide portions 24 provided on the lower back surface of the backrest 7.

[0023] A pair of support rod portions 5 are provided on the left and right sides. Each of the left and right support rod portions 5 has a front upright rod portion 12, a rear upright rod portion 13, and a support rod connection portion 14 that connects the front upright rod portion 12 and the rear upright rod portion 13 in their upper regions. The support rod connection portion 14 is configured to be U-shaped in side view. A pair of lower slide portions 23 and a pair of upper slide portions 24 are slidably attached to the pair of front upright rod portions 12.

[0024] As shown in FIG. 3, the lower slide portion 23 is attached to both left and right end positions of the rear end of the seat portion 6. The lower slide portion 23 is U-shaped in plan view, with a lower insertion opening 34 for inserting the front upright rod portion 12 provided on the rear side, and a slip-out prevention portion 35 provided on the rear side so as to block the insertion opening of the lower slide portion 23. Meanwhile, the upper slide portion 24 is also U-shaped in plan view, and is provided on both left and right end sides of the lower side of the backrest portion 7. An upper insertion opening 36 for inserting the front upright rod portion 12 is provided on the front side (backrest 7 side). The upper insertion opening 36 is configured so that the front upright rod portion 12 is prevented from slipping out by attaching the upper slide portion 24 to the back surface of the backrest portion 7.

[0025] If a configuration is provided with a front upright rod portion 12 and a rear upright rod portion 13, the weight on the front upright rod portion 12 is also applied to the rear upright rod portion 13 via the support rod connection portion 14, and can be supported by two support rod portions 5, the front upright rod portion 12 and the rear upright rod portion 13, making it lighter than supporting with a single support rod portion. In addition, the front upright rod portion 12 and the rear upright rod portion 13 can be constructed by bending an inexpensive pipe into a U-shape and fixing its base end to the base portion 4 to make it stand upright, which also reduces manufacturing costs.

[0026] In a configuration in which a height adjustment unit (lifting device) is provided at the center of the seat, as in the device of Patent Document 2, a large and heavy lifting device is required, but the configuration of this embodiment suffices for the linear actuator 9 used to be small and lightweight. Because the support rod 5 and the lifting device are small and lightweight, the transfer assistance device 1 can be easily installed in a predetermined location.

[0027] As shown in FIG. 4, the inclination angle φ of the support rod 5 relative to the vertical line 30 of the base 4 is preferably set to a rearward inclination angle of 0° to 15°, more preferably 5° to 10°. By providing such an inclination angle φ, part of the weight of the seat 8 can be shared by the support rod 5, thereby contributing to a more compact and lightweight seat. In this embodiment, in which the support rod 5 is composed of a front upright rod 12 and a rear upright rod 13, it is also possible to appropriately adopt a configuration in which the front upright rod 12 is the only member to be provided with an inclination angle φ. However, in order to improve the weight sharing, it is preferable that the rear upright rod 13 also have an inclination angle φ similar to that of the front upright rod 12, as in the configuration shown in FIG. 4.

[0028] <Support plate part 28> A support plate 28, provided to correspond to the base end positions of the front upright rod 12 and the rear upright rod 13, is fixed to the upper surface of the rear half of the base 4. The support plate 28 has a plurality of stud bolts (four bolts) provided on the base 4, and the pipes of the front upright rod 12 and the rear upright rod 13 are fixed to the support plate 28 by means of welding or the like.

[0029] The support plate 28 reinforces the base end regions of the front upright rod 12 and the rear upright rod 13 when weight is applied to the seat 6. With this configuration, the areas around the two base regions of the support rod 5 can be reinforced, and the force applied to the support rod 5 can be applied to the entire area of ​​the support plate 28, so that the presence of the support plate 28 can prevent the force from concentrating on one part of the base 4.

[0030] In this case, the support plate portion 28 also functions as reinforcement for the rear half of the base portion 4, which is subjected to force. Note that the support plate portion 28 is shown configured such that its length in the front-to-rear direction is approximately half the length of the base portion 4 in the front-to-rear direction, and its length in the lateral direction is shorter than that of the base portion 4; however, if the support plate portion 28 is lightweight, it may be provided on the entire surface of the base portion 4.

[0031] <Seating area 8> The seat 8 has at least a seat surface 6 and a backrest 7. The seat surface 6 is a member that supports the user's buttocks and is configured in a flat shape with no obstacles on three sides: the front, left, and right. The shape of the seat surface 6 can be configured to be approximately square in a plan view.

[0032] "Flat shape without obstacles" means that there are no obstacles that would substantially impede movement. For example, this means that there are no uneven surfaces that would make it difficult for the user's buttocks to slide (transfer). The upper surface 6a of the seat portion 6 has a slippery surface that makes transfers easy. To make it easier to position yourself when seated, frictional resistance can be reduced by using inert materials such as polyethylene (PE) and polypropylene (PP).

[0033] As shown in Figures 4 and 5, the angle θ between the upper surface 6a of the seating surface 6 and the horizontal line 31 of the base 4 is preferably between 0° and 15°, and more preferably between 3° and 8°, with the front rising upward. If the attachment angle between the upper surface 6a of the seating surface 6 and the support rod 5 is vertical (90°), this angle θ will be the same as the angle φ (between 0° and 15°). Setting this angle θ can improve the backrest function. Furthermore, the inclination angle θ and the inclination angle φ can be made different as needed. The angle range for the difference is preferably between +15° and -0°. If the inclination angle θ is greater than the inclination angle φ, the effect of "easy to sit on" will be created. If the inclination angle θ is smaller than the inclination angle φ, the effect of "difficult to sit on" will be created. The shape can be selected appropriately depending on the use of the transfer assistance device 1.

[0034] The front-to-rear width of the seating surface 6 is preferably 300 mm to 600 mm, and the width is preferably 300 mm to 500 mm. From the viewpoint of stability, it is preferable that the front end position of the seating surface 6 does not exceed the front end position of the base portion 4. Furthermore, it is preferable that the length of vertical movement of the seat portion 6 be 0 mm or more and 600 mm or less.

[0035] Friction-improving surface portions 10 are formed at positions corresponding to the front, left, and right sides of the seat portion. In particular, it is preferable to provide them near both the left and right sides of the rear of the seat portion 6. The friction-improving surface portions 10 are surfaces that prevent the transfer boat from slipping when being transferred to the user. In this embodiment, the friction-improving surface portions 10 can be made of a friction-improving sheet 16 that has been subjected to a non-slip treatment. An example of such a friction-improving sheet 16 is Grip Sheet (registered trademark). The friction-enhancing sheet 16 has small irregularities, for example, a small one measuring about 15 mm x 100 mm is sufficient. Therefore, the friction when the care-requiring person gets on and off the seat portion 6 is not high, and it is a preferable configuration because it increases the frictional force in relation to the transfer boat.

[0036] <Backrest part 7> The backrest 7 is separated from the seat 6, allowing for a high degree of freedom in terms of size and angle. The backrest 7 is a component that primarily supports the back of the care recipient and, together with the seat 6, supports the body of the care recipient. Both the backrest 7 and the seat 6 are tilted at an angle φ formed by the support rod 5 relative to the vertical line 30, allowing for elevation movement. The width of the backrest is preferably 300 mm to 500 mm, and the height is preferably 200 mm to 700 mm. The backrest 7 is preferably constructed from a combination of a frame member that forms the outer edge of the backrest 7 and a net member (sewn product) that stretches from the frame member. The backrest 7 can also be constructed from a frame member and cushion fabric. It is preferable that this cushion fabric be replaceable without tools. If necessary, the tilt angle φ can be fine-tuned by selecting the cushion fabric.

[0037] Flip-up hand supports 18 are provided at the left and right lower end portions of the backrest 7, and are configured so that when the hand supports 18 are flipped up, there are no obstacles when the seat 6 moves to the left, right, and forward. By providing the flip-up hand supports 18, the user can grasp the hand supports 18 with their hands to support their body as needed, making it easier for the user to position themselves for easy transfer.

[0038] <Linear Actuator 9> The linear actuator 9 is a member provided on the base 4, and is a member that moves the seat 8 up and down along the support rods 5. The mounting position of the housing 19 of the linear actuator 9 on the base 4 is set at the center position of the left and right support rods 5 in the horizontal direction, and at approximately the same position as the front and rear position of the front upright rod 12 in the front-to-rear direction. The tip of the movable rod 20 of the linear actuator 9 is rotatably attached to a pivot 38 of a fixed part 21 provided on the upper back of the backrest 7. A motor is attached to the housing 19 as a drive source 11, and drives a worm gear system within the linear actuator 9 to convert the rotational motion of the motor into linear motion of the movable rod 20, moving the seat 8 up and down and changing its position.

[0039] At the lowest position shown in Figure 4 where the movable rod 20 is most fully housed within the housing 19, it is preferable that the height of the upper surface 6a of the seat portion 6 from the installation surface 3 be as low as possible, and in this embodiment it is about 100 mm low. Such a low position is possible because the base portion 4 is made of a thin plate, and it is difficult to achieve a low position with a configuration in which wheels (casters) are attached to the base body as disclosed in Patent Document 2. In this embodiment, it is preferable that the maximum height from the installation surface 3 be 500 mm or more.

[0040] The transfer assistance device 1 according to this embodiment has a wired remote control type lift operation unit 26, which in particular employs a button switch. This configuration makes it easy for not only the assistant assisting the transfer but also the user himself to operate it.

[0041] <Example of usage> There are many wheelchair users who use both indoor and outdoor wheelchairs. In these cases, it is desirable to be able to transfer between indoor and outdoor wheelchairs without having to go through the steps at the entrance and to be able to transfer smoothly between the two wheelchairs. Hereinafter, a mode in which the transfer assistance device 1 is used will be described, taking as an example a case in which the boundary with the outside is an entrance.

[0042] For example, transfer assistance device 1 is permanently installed in the dirt floor of an entrance hall, and the upper surface 6a of seat 6 of transfer assistance device 1 is raised to the same height as or slightly lower than the height of the seat (not shown) of an indoor wheelchair. Then, if necessary, a transfer boat (not shown) is used to transfer the user in the indoor wheelchair onto seat 6 of transfer assistance device 1. When using a transfer boat, friction-improving surfaces 10 are formed at positions corresponding to at least the left and right sides of seat 6, so the transfer can be performed smoothly without slipping.

[0043] After the user has transferred onto the seat part 6 of the transfer support device 1, the height of the seat part 6 of the transfer support device 1 is lowered to the height position of the seat part of the going-out wheelchair placed on the dirt floor, and the user is similarly transferred onto the seat part of the going-out wheelchair. In this way, when considering transfers when going out, the user can transfer to the transfer assistance device 1 once it has been lifted up to eliminate the step, and then lift it down to transfer from the transfer assistance device 1 to the outdoor wheelchair, thereby safely and smoothly transferring over the step at the entrance. When returning home from an outing in the outdoor wheelchair, the user first transfers to the transfer assistance device 1 in the lift-down state, and then lifts it up to transfer to the indoor wheelchair.

[0044] <Other usage examples> In the above embodiment, the transfer operation at the entrance has been explained as an example, but the transfer assistance device 1 is a lightweight, compact device with a small installation area that allows for height adjustment while transferring to a desired location, so it can also be used for standing up indoors, transferring to a bed, etc. In other words, it can be used as a device to eliminate height differences for users who have difficulty walking or who require care, and the number of places where it can be installed can be expanded depending on how the user uses it.

[0045] In particular, the lowest position of the upper surface 6a of the seat 6 can be set much lower than in conventional transfer assistance devices, which increases the number of cases where the user can transfer by themselves from a seated position on the floor. Also, the hand support 18 on the side to which the user is transferring can be flipped up, making transfer easier. Furthermore, when the seat portion 6 is in the lowest position, the hand support 18 is at a height that makes it easy to grasp with the hands, so the hand support 18 or the seat portion 6 can also be used to assist in standing up, for example, by holding the hand support 18 in the hand and operating the lifting operation portion 26 to raise the position of the hand support 18 upward.

[0046] [Second embodiment] The second embodiment will be described with reference to FIGS. The transfer assistance device 1 according to the second embodiment is characterized in that a seat-side standing portion 44 is provided at the rear of the seat portion 6, and the slide portion 22 is fixed to the seat-side standing portion 44. Note that the seat-side standing portion 44 is not limited to a rod shape. 6 and 7, the seat-side standing portion 44 is composed of a pair of seat-side standing rods 42 erected at positions near both the left and right ends at the rear of the seat portion 6. The pair of seat-side standing rods 42 may be fixed to the rear end surface of the seat portion 6 instead of from the upper surface 6a of the seat portion 6.

[0047] In the configuration shown in Figures 6 and 7, an upper connecting rod portion 43 is provided at the upper end of a pair of seat side standing rod portions 42, and the pair of seat side standing rod portions 42 are connected in the upper region to form an approximately U-shaped connecting portion, thereby increasing the strength and stability of the pair of seat side standing rod portions 42. In this second embodiment, an example is shown in which the upper slide portion 24 of the slide portion 22 is fixed to a predetermined lower position of a pair of seat side upright rod portions 42, and the lower slide portion 23 of the slide portion 22 is fixed to the left and right rear end portions of the seat portion 6, as in the first embodiment. Furthermore, the fixed portion 21 to which the tip of the movable rod 20 is engaged is fixed to the upper connecting rod portion 43, and the back portion of the backrest portion 7 is fixed to the upper connecting rod portion 43 and the pair of seat side upright rod portions 42, so that the backrest portion 7 and the seat portion 6 also move up and down in accordance with the moving up and down movement of the sliding portion 22 as the movable rod 20 extends and retracts.

[0048] Furthermore, a hand support rod 41 that supports the hand support 18 is provided at a mounting portion 40 of the seat portion 6 rather than at the backrest portion 7, and the hand support rod 41 is supported rotatably relative to the seat portion 6. In the configuration of the second embodiment, the upper slide portion 24 is fixed to the pair of seat-side upright rods 42, which has the advantage that the configuration and shape of the backrest 7 can be freely set without being restricted by conditions such as strength when configuring the backrest 7. Furthermore, stability can be improved by supporting the parts to which force is applied with seat-side upright portions 44 such as the pair of seat-side upright rods 42. In the configuration of the second embodiment, the seat portion 6 is a member that supports the pair of seat-side upright rods 42 and the backrest 7, so a base portion (frame portion) of the seat portion 6 that is high in strength is adopted.

[0049] Although the present invention has been described above by way of example of an embodiment, the technical scope of the present invention is not limited to the configurations described in the above embodiment. The technical scope of the present invention should be determined based on the claims, and it goes without saying that various modifications, additions to the configuration, and improvements can be made within that scope. [Explanation of symbols]

[0050] 1: Transfer assistance device 2: Device main body 4: Base section 5: Support rod part 6: Seat part 7: Backrest 8: Seat 9: Linear actuator 10: Friction improving surface part 12: Front standing rod 13: Rear standing rod 14: Support rod connection part 22: Slide section 28: Support plate part 29: Long hole 30: Vertical line 33: Base plate part 42: Seat side standing rod portion (an example of a seat side standing portion) 44: Seat side standing part φ: Inclination angle between the support rod and the vertical line of the base

Claims

1. a base portion that holds the device main body portion; a pair of support rods extending upward from the base; a seat portion attached to the support rod portion so as to be slidable in the up and down direction and including a seat surface portion and a backrest portion; a linear actuator that changes the height position of the seat portion relative to the base portion; and A transfer assistance device characterized in that the tilt angle φ that the support rod portion makes with a line perpendicular to the base portion is set to a rearward tilt angle of 0° or more and 15° or less.

2. The transfer assistance device of claim 1, wherein the support rod portion has a front upright rod portion provided at a front position, a rear upright rod portion provided at a rear position, and a support rod connection portion that connects the front upright rod portion and the rear upright rod portion in an upper region, and a slide portion provided on the seat portion is slidably attached to the front upright rod portion.

3. 3. The transfer assistance device according to claim 2, wherein a seat-side erection portion is provided at a rear position of the seat portion, and the slide portion is fixed to the seat-side erection portion.

4. The base portion is composed of a base plate portion having a flat base, 4. The transfer assistance device according to claim 1, wherein the front-to-rear width is 500 mm or more and 1000 mm or less, and the width is 400 mm or more and 600 mm or less.

5. The transfer assistance device according to any one of claims 1 to 3, wherein friction-improving surface portions are formed at left and right lateral positions on the upper surface of the seat portion.

6. 4. The transfer assistance device according to claim 1, wherein the seat portion is formed in a planar shape with no obstacles on three sides, ie, the front, left, right, and side.

7. 4. The transfer assistance device according to claim 1, wherein the base portion is disposed at a boundary between the inside and outside of a home, and is used to eliminate a step at the boundary.

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