JP2023030463A - Back pad material for wheelchair - Google Patents

Abstract

To provide a back pad material for a wheelchair, the material which can stably support the back of a seated user through a simple structure, while preventing the thickness of the back pad part of a wheelchair from increasing and which is also provided with excellent durability.SOLUTION: A back pad material 1 for a wheelchair is installed, through an installation member 6 made of a belt material for example, on a backrest part of a conventionally known folding wheelchair or the like. The back pad material 1 for a wheelchair includes: a cushioning material 2 made of a soft material; a shape retention plate 3 which is arranged on the back side of the cushioning material 2 as a reinforcement; and a covering material 5 composed of a bag-like body, etc., which covers the outer periphery of the back pad material body 4 made of a laminate with the cushioning material 2 and the shape retention plate 3.SELECTED DRAWING: Figure 2

Description

TECHNICAL FIELD The present invention relates to a wheelchair back support that is attached to the backrest of a wheelchair via an attachment member.

2. Description of the Related Art Conventionally, in a folding wheelchair, for example, considering portability and storage space, an X-shaped folding mechanism is arranged between two symmetrical frames, and a seat is placed horizontally between the two frames. It is known that a backrest mat is covered between a pair of left and right backrest bars that are installed in the rear upper part of the frame (see the background art of Patent Document 1).

Further, as shown in Patent Document 2, in order to provide a lumbar support which has a simple structure and which can be freely installed on various chairs, a lumbar support main body whose interior is filled with an elastic member made of urethane foam or the like is provided. 2. Description of the Related Art There is known a chair waist support provided with elastic attachment belts on the left and right sides of a chair, the tips of the attachment belts being connectable to each other, and being wound around the backrest of a chair or the like.

Furthermore, as shown in Patent Document 3, an elliptical/flat air cushion is fixed in position on the backrest of an automobile seat or the backrest of an office chair using a dedicated rubber band or belt, and the air cushion is By making it possible to freely adjust the firmness according to the air pressure supplied to the lumbar area, the air cushion is brought into contact with the spine while the vehicle is running or during office work, etc., massaging the muscles and promoting blood circulation. An air cushion structure is known that promotes blood circulation in the body and prevents and improves fatigue and lumbago.

Utility Model Registration No. 3215892 JP 2003-250665 A Utility Model Registration No. 3203392

In the folding wheelchair disclosed in Patent Document 1, a backrest mat made of a cloth material or the like is simply covered between a pair of left and right backrest bars provided above the rear portion, so that the wheelchair can stand on its own. When a user who is a severely ill patient who has difficulty sitting down sits with his/her back in contact with a backrest mat, the user's sitting posture is stabilized while relieving the pressure acting on the user's back. difficult to hold.

Therefore, by installing the chair waist support disclosed in Patent Document 2 or the air cushion structure disclosed in Patent Document 3 on the backrest of the wheelchair, the backrest is provided with sufficient cushioning properties. , to stabilize the sitting posture of the user. However, when using a waist support body filled with an elastic member made of urethane foam or the like, or an air cushion structure using air pressure, in order to stably support the back of the user seated in the wheelchair, the waist It was necessary to make the main body or air cushion structure sufficiently thick and to stabilize the user's back with the repulsive force obtained by greatly compressing and deforming it.

If the lumbar support body or air cushion structure with a large thickness is installed on the backrest of the wheelchair as described above, the backrest of the wheelchair becomes an obstacle for users with mild symptoms who can sit independently in the wheelchair. , the sitting posture of the user may become rather unstable. Therefore, the waist support main body or the air cushion structure had to be removed one by one. In addition, due to deterioration of the elastic member made of urethane foam or the like, or air leakage from the air cushion structure, the repulsive force of the backrest tends to decrease, and sufficient durability cannot be obtained. was there.

The present invention has been made in consideration of the above points, and is designed to prevent the thickness of the backrest of the wheelchair from increasing and to stabilize the back of the user sitting on the wheelchair with a simple structure. To provide a backrest material for a wheelchair that can support a wheelchair and has excellent durability.

A wheelchair backrest material according to the present invention is a wheelchair backrest material that is attached to the backrest of a wheelchair via an attachment member, comprising: a cushion material made of a flexible material; and a covering material for covering the outer peripheral surface of the backrest material main body composed of the laminated body of the cushion material and the shape-retaining plate.

According to this configuration, when the wheelchair is used by a seriously ill patient who finds it difficult to sit independently in the wheelchair, the pressure acting on the user's back can be reduced according to the flexibility of the cushion material. Moreover, since the shape-retaining plate can effectively reinforce the cushioning material and suppress its deformation, it is possible to support the user's back while suppressing an increase in the thickness of the backrest of the wheelchair. The shape-retaining force of the seat can be sufficiently secured, and the sitting posture of the user can be stabilized. Therefore, even for users with mild symptoms who can sit independently in the wheelchair, the wheelchair backrest material is prevented from becoming an obstacle, requiring a complicated operation of removing the wheelchair backrest material from the wheelchair one by one. It is possible to stabilize the sitting posture of the user. In addition, unlike the prior art, the elastic member made of urethane foam or the like does not deteriorate, and the air cushion structure does not leak air, so there is an advantage that sufficient durability can be obtained.

It is preferable that the shape-retaining plate has a width dimension larger than an installation interval of a pair of left and right rear frame members provided on the side portions of the backrest portion.

According to this configuration, it is possible to prevent the shape-retaining plate from getting stuck between the two rear frame members provided in the backrest of the wheelchair, and to reliably maintain the shape-retaining effect of the shape-retaining plate. can be effectively stabilized.

Further, the mounting member is composed of a pair of right and left belt materials provided integrally with the covering material, and both the belt materials are provided with a connecting portion for detachably connecting the tip portions thereof. may be

According to this configuration, the operation of attaching and removing the backrest member for the wheelchair can be easily performed, and the vertical position of the backrest member for the wheelchair can be easily and properly adjusted according to the physique of the user. By doing so, there is an advantage that the back of the user can be stably supported by contacting the backrest material for the wheelchair against the lower trunk portion such as the lumbar spine of the user.

Further, it is preferable that at least one of the covering material and the belt material is provided with a non-slip portion for preventing positional deviation of the wheelchair with respect to the backrest portion.

According to this configuration, even when the user who is seated on the wheelchair shakes, the vertical or horizontal displacement of the backrest material for the wheelchair is effectively restricted, and the user's back is stabilized. It is possible to fix the wheelchair backrest in a supportive position.

Moreover, it is preferable that the belt member is formed of an elastic material that can be stretched.

According to this configuration, the elastic force of the belt material can be used when the wheelchair backrest member is attached to the backrest portion of the wheelchair, so that the wheelchair backrest member can be more stably fixed to the backrest portion. It is possible.

Further, it is preferable that an opening for inserting and removing the back support material main body and a fastening tool for fastening the opening so as to be able to open and close are provided on the back side of the covering material.

According to this structure, the backrest material main body can be put in and taken out from the covering material, and exchange or cleaning thereof can be easily performed.

According to the wheelchair backrest material of the present invention, it is possible to stably support the back of the user seated on the wheelchair with a simple structure while preventing the thickness of the backrest portion of the wheelchair from increasing. At the same time, it has an effect of having excellent durability.

1 is a perspective view showing an attached state of a wheelchair back member according to an embodiment of the present invention; FIG. 1 is a plan view showing an attached state of a wheelchair back member according to an embodiment of the present invention; FIG. 1 is a perspective view showing the structure of a wheelchair backrest member; FIG. FIG. 4 is an explanatory view showing the back portion of the wheelchair back support; FIG. 5 is a cross-sectional view taken along line VV of FIG. 4; FIG. 4 is a perspective view showing the structure of a cushion material;

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of a wheelchair backrest material according to the present invention will be described below with reference to the drawings. It should be noted that the same reference numerals in each figure indicate the same configuration, and the description thereof will be omitted.

1 and 2 show a state in which a wheelchair back support 1 according to an embodiment of the present invention is attached to a foldable wheelchair 10. FIG. Since the structure of the wheelchair 10 is well known in the art, a detailed description thereof will be omitted. drive wheels 13 and casters 14. The side frames 11 are composed of a rear frame member 15 made of pipe material extending vertically along the rear end of the folding wheelchair 10, and a seating frame made of a pair of left and right pipe materials extending in the front-rear direction on the axle of the drive wheel 13. material 16;

A backrest member 17 made of a flexible material such as cloth or plastic sheet is stretched between the left and right rear frame members 15 . The backrest member 17 and the rear frame member 15 constitute the backrest portion 10 a of the wheelchair 10 . Between the left and right seat frame members 16, a seat member sheet member 18 made of a flexible material such as cloth or plastic sheet member is stretched. The seat portion sheet material 18 and the seat frame member 16 constitute the seat portion 10b of the wheelchair 10. As shown in FIG.

When the wheelchair 10 is not in use or the like, the folding mechanism 12 is operated to bring the left and right side frames 11 closer to each other, and the backrest member 17 and the seat member 18 are each folded, thereby making the wheelchair 10 more compact. It is designed to be Instead of the seat member 18, a seat plate member made of a plastic plate or a wooden plate having sufficient rigidity is placed on the left and right seat frame members 16 to make the wheelchair 10 more compact. The seat plate member may be removed from the seat portion 10b of the wheelchair 1 or moved to an upright state when the wheelchair 1 is seated.

As shown in FIGS. 3 to 6, the wheelchair backrest material 1 according to the embodiment of the present invention comprises a cushion material 2 made of a flexible material, and the back side of the cushion material 2, that is, the backrest portion 10a of the wheelchair 10. A shape-retaining plate 3 disposed on the side (rear side), a covering material 5 covering the outer peripheral surface of the back support material main body 4 composed of a laminate of the cushion material 2 and the shape-retaining plate 3, and this covering material 5 and a mounting member 6 made of a pair of right and left belt materials, the base ends of which are fixed to the mounting member 6 .

The cushion material 2 is made of a highly flexible and moderately elastic material such as urethane foam, and has a substantially rectangular shape with a width of, for example, about 400 mm, a vertical dimension of, for example, about 170 mm, and a thickness of, for example, about 40 mm. formed into a shape. As shown in the plan view of FIG. 5, the surface side of the cushion material 2 is formed with a curved surface 21 that is recessed so that the thickness becomes thinner toward the central portion. As shown in FIG. 6, the curved surface 21 is provided with an uneven portion composed of a recessed line 22 and a projected line 23 extending in the vertical direction of the cushion material 2 .

The shape-retaining plate 3 is made of a material having appropriate rigidity and elasticity, such as polypropylene or polyethylene, and is formed into a substantially rectangular shape having substantially the same width and vertical dimensions as the cushion member 2 . The thickness of the shape-retaining plate 3 is not particularly limited. It is preferable to set the obtained value, for example, about 2 mm. The width dimension of the shape retaining plate 3 is, as shown in FIG. is set to a value greater than the distance of

The covering material 5 is a bag-like body sewn to a size capable of accommodating the back support material main body 4 comprising the laminate of the cushion material 2 and the shape-retaining plate 3 . In addition, on the rear surface of the covering material 5, that is, on the surface positioned on the rear side of the wheelchair 10, an opening 51 consisting of a slit for inserting and removing the backrest material main body 4 and the opening 51 are fastened so as to be openable and closable. A fastener 52 made of a slide fastener, hook-and-loop fastener, or the like is provided. The covering material 5 is preferably made of a breathable material such as a polyester mesh or a mesh-like cloth material. As a result, even when the user's back is in close contact with the wheelchair backrest member 1, it is possible to prevent the user from getting stuffy.

The mounting member 6 is composed of a pair of left and right belt members fixed to the right and left side portions thereof by, for example, joining the base ends thereof. etc. is provided. In addition, instead of the hook-and-loop fastener, using a connecting portion such as a hook having a corresponding hook-shaped portion, a snap button having a corresponding uneven portion, or a buckle having a pin to be inserted into the belt hole, The leading end portions of both belt members may be connected to each other in a detachable manner.

In addition, a non-slip portion 62 made of an embossed surface or the like is provided on at least the base end portion on the back side of the attachment member 6 made of a belt material to prevent the wheelchair 10 from being displaced with respect to the backrest portion 10a. . As a result, when the wheelchair backrest member 1 is attached to the backrest portion 10a of the wheelchair 10 via the attachment member 6, the non-slip portion 62 is pressed against the surface of the backrest member 17 positioned at the installation portion of the rear frame member 15. The wheelchair backrest member 1 is stably held on the backrest portion 10a of the wheelchair 10 according to the frictional force generated by the movement of the wheelchair 10, thereby preventing the displacement.

As described above, the wheelchair backrest material 1 according to the present invention includes the cushion material 2 made of a flexible material, the shape-retaining plate 3 disposed on the back side of the cushion material, the cushion material 2 and the shape-retaining material. The backrest material body 4 made of a laminate of plates 3 is provided with a covering material 5 covering the outer peripheral surface of the backrest material body 4, and is configured to be attached to the backrest portion 10a of the wheelchair 10 via the mounting member 6. There is an advantage that the back of the user sitting on the wheelchair 10 can be stably supported with a simple configuration while preventing the thickness of the backrest portion 10a from increasing.

That is, since the backrest material main body 4, which is the main part of the wheelchair backrest material 1, is composed of a laminate of the cushion material 2 made of a flexible material and the shape-retaining plate 3 having appropriate rigidity, the wheelchair 10 can be When used by a seriously ill patient who has difficulty sitting upright, the flexibility of the cushion material 2 can effectively relieve the pressure acting on the user's back. Moreover, since the shape-retaining plate 3 effectively reinforces the cushioning material 2 and suppresses its deformation, the backrest of the wheelchair can be prevented from being deformed like the prior art using the waist support main body or the air cushion structure. The user's sitting posture can be stabilized by sufficiently securing a shape-retaining force for supporting the user's back while suppressing an increase in thickness.

Therefore, even for a mildly ill user who can sit on the wheelchair 10 independently, the wheelchair backrest member 1 is prevented from becoming an obstacle, and the wheelchair backrest member 1 is removed from the backrest portion 10a of the wheelchair 10. It is possible to stabilize the sitting posture of the user without requiring a complicated operation of removing each one. In addition, it is possible to reduce the risk of deterioration of the elastic member made of urethane foam or the like, or air leakage from the air cushion structure, as in the prior art, so that there is an advantage that sufficient durability can be obtained.

In particular, when the wheelchair 10 is of a foldable type as in the present embodiment, the backrest material 17 in the backrest portion 10a is often formed of a soft material such as a cloth material, so it is difficult to sufficiently maintain the posture of the user. . Even when the backrest portion 10a is formed of a soft material as described above, the wheelchair backrest material 1 according to the present embodiment can maintain elasticity by the cushion material 2 and the shape-retaining plate 3, so that the posture of the user can be adjusted. It becomes possible to maintain easily.

As shown in the above-described embodiment, when the width dimension of the shape-retaining plate 3 is set larger than the installation interval W between the pair of left and right rear frame members 15 provided on the side portions of the backrest portion 10a, both Since the shape-retaining plate 3 is reliably prevented from being fitted between the rear frame members 15 and its shape-retaining action is maintained, the sitting posture of the user can be effectively stabilized. In the above-described embodiment, the width and vertical dimensions of the cushion material 2 and the width and vertical dimensions of the shape-retaining plate 3 are set to substantially the same values. To effectively suppress the deformation of a cushion material 2 according to the shape retention force of the shape-retaining plate 3 even when the dimension is slightly larger than the shape-retaining plate 3 or slightly smaller than the shape-retaining plate 3. Is possible.

Further, as in the above-described embodiment, when the curved surface 21 having a concave central portion in a plan view is provided in the central portion of the surface side of the cushioning material 2, the user sitting on the wheelchair 10 can move his/her back against the wheelchair. By guiding the center line of the back to the central portion side of the cushion material 2 when it is brought into contact with the surface of the back support material 1, the seating posture of the vehicle in use can be stabilized. Furthermore, in the case where the curved surface 21 is provided with an uneven portion consisting of the concave ridges 22 and the convex ridges 23 extending in the vertical direction of the wheelchair back support 1, the user's back can be tilted left and right by the uneven portions. Movement can be effectively suppressed, and the seating posture of the vehicle can be further stabilized. It should be noted that instead of the recessed and protruding portions formed by the grooves 22 and the protrusions 23, a configuration in which a large number of hemispherical portions or the like are provided on the curved surface 21 of the cushion material 2 may be employed.

In the above-described embodiment, the attachment member 6 consisting of a pair of left and right belt members whose base ends are fixed to the left and right side portions of the covering member 5 is provided on the wheelchair back support member 1, and the leading end portions of both belt members are connected. The wheelchair backrest member 1 is attached to the backrest portion 10a of the wheelchair 10 by being detachably connected by the portion 61 . As a result, there is an advantage that the wheelchair back support 1 can be easily attached and the wheelchair back support 1 can be easily removed from the wheelchair 10 as required. Moreover, by adjusting the vertical position of the wheelchair backrest member 1 according to the user's physique, etc., the wheelchair backrest member can be easily and properly adjusted to the lower trunk portion of the user, such as the lumbar vertebrae. 1 can be brought into abutment to effectively hold the user's back.

Instead of the above-described embodiment in which the mounting member 6 made of a pair of left and right belt materials is provided integrally with the covering material 5, a pair of left and right belt materials and a coupler for connecting the belt material and the covering material are provided. The covering may be attached to the backrest by an attachment member having a . Further, a configuration may be adopted in which a mounting member such as a hook-and-loop fastener that is attached to the back surface of the covering material 5 is provided on the backrest portion 10a of the wheelchair 10 or the like.

In the above-described embodiment, the non-slip portion 62 made of an embossed surface or the like for preventing the wheelchair 10 from being displaced with respect to the backrest portion 10a is provided on the base end side portion of the mounting member 6 made of a pair of left and right belt materials. configuration. Therefore, even when the user who sits on the wheelchair 10 shakes, the vertical or horizontal displacement of the backrest material 1 for the wheelchair is effectively restricted, and the user's back is stabilized. The wheelchair back support 1 can be fixed at a position where it can be supported by It should be noted that the covering member 5 may be provided with a non-slip portion made of an embossed surface or the like, or both the belt member and the covering member 5 may be provided with the non-slip portion.

It is also possible to form the mounting member 6, which is a pair of left and right belt materials, from an elastic material that can be stretched. In this case, when the wheelchair backrest member 1 is attached to the backrest portion 10a of the wheelchair 10, the elastic force of the belt member can be used. Therefore, the wheelchair back support 1 can be more stably fixed to the backrest portion 10a.

Further, as shown in the above-described embodiment, an opening 51 is formed on the back side of the covering material 5 for taking in and out the back support material main body 4 composed of the laminated body of the cushion material 2 and the shape-retaining plate 3. In the case of providing a fastening tool 52 for fastening the opening 51 so that it can be opened and closed, the backrest material main body 4 can be easily taken in and out of the covering material 5 to facilitate replacement or cleaning thereof. It can be carried out.

It should be noted that, instead of the configuration described above, a configuration in which the opening 51 and the fastening member 52 are provided on the surface side of the covering material 5 is also possible. However, in this case, the opening 51 and the fasteners 52 are exposed on the surface side of the wheelchair back support 1, degrading the appearance, and the fasteners 52 made of a slide fastener or the like are difficult for the user to handle. There is a detrimental effect in that it abuts against the user's back and gives the user a sense of discomfort. For this reason, it is preferable that the opening 51 and the fastener 52 are provided on the back side of the covering material 5 as shown in the above-described embodiment.

1 back support material for wheelchair 2 cushion material 3 shape retaining plate 4 body of back support material 5 covering material 6 attachment member (belt material)
10 Wheelchair 10a Backrest 10b Seat 11 Side Frame 12 Folding Mechanism 13 Drive Wheel 14 Caster 15 Rear Frame Material 16 Seat Frame Material 17 Backrest Material 18 Seat Material 21 Curved Surface 22 Groove 23 Protrusion 51 Opening 52 Stop Fitting 61 Joining part 62 Non-slip part W Installation interval of rear frame material

Claims (6)

A wheelchair backrest material that is attached to the backrest of a wheelchair via an attachment member,
A cushioning material made of a flexible material,
a shape-retaining plate disposed on the back side of the cushion material;
a covering material that covers the outer peripheral surface of the backrest material main body composed of a laminate of the cushion material and the shape-retaining plate;
Wheelchair backrest material. The shape-retaining plate has a width dimension larger than an installation interval between a pair of left and right rear frame members provided on the side portions of the backrest portion.
The wheelchair back support material according to claim 1. The mounting member comprises a pair of right and left belt members provided integrally with the covering member,
Both the belt materials are provided with a connecting portion that releasably connects the tip portions thereof,
The wheelchair back support material according to claim 1 or 2. At least one of the covering material and the belt material is provided with a non-slip portion for preventing displacement of the wheelchair with respect to the backrest portion,
The wheelchair back support material according to claim 3. The belt material is formed of an elastic material that can be stretched,
The wheelchair back support material according to claim 3 or 4. The back side of the covering material is provided with an opening for inserting and removing the main body of the backing material, and a fastening tool for fastening the opening so that the opening can be opened and closed.
The wheelchair backrest material according to any one of claims 1 to 5.

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