Backrest pad

Abstract

To suppress deformation of a backrest pad when the backrest pad receives the back of a wheelchair user.SOLUTION: A backrest pad 10 is fitted to a side handrail 113 disposed along a wall of a cabin and formed of a soft material that receives the back of a wheelchair user while being held between the wall and the back of the wheelchair user who sits on a wheelchair. The backrest pad is provided with a reinforcement member 60 extending in a vertical direction in a width directional outside part.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a structure of a backrest pad that is sandwiched between the wall of a vehicle compartment and the back of a wheelchair user to support the back of the wheelchair user. [Background technology]

[0002] Patent Document 1 discloses that when securing a wheelchair inside a bus, a backrest board is fixed to a convex structure such as a wheelhouse that protrudes above the floor, a wheelchair securing device is attached to this, and the wheelchair back is secured to the wheelchair securing device with the backrest facing the backrest board. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2004-65414 A Summary of the Invention [Problem to be solved by the invention]

[0004] The backrest board described in Patent Document 1 is subjected to an impact force from a wheelchair user in the fore-and-aft direction of the vehicle when the bus suddenly starts or collides. The backrest board is required to absorb this impact force. For this reason, the installation of a backrest pad made of a flexible material instead of the backrest board has been considered. However, if the backrest pad is made of a flexible material, there is a risk that the backrest pad will deform in the fore-and-aft direction of the vehicle when it receives the back of a wheelchair user.

[0005] Therefore, an object of the present invention is to suppress deformation of the backrest pad when it supports the back of a wheelchair user. [Means for solving the problem]

[0006] The backrest pad of the present invention is attached to a horizontal handrail arranged along the wall of a vehicle compartment, and is sandwiched between the wall and the back of a wheelchair user seated in a wheelchair, and is made of a soft material to support the back of the wheelchair user. Established in Reinforcing member extending in the vertical direction and a groove portion that is open to the bottom and that is hooked onto the horizontal handrail, the reinforcing member extends in the vertical direction across the upper and lower sides of the groove portion, and the length of the upper portion above the groove portion is longer than the length of the lower portion below the groove portion, It is characterized by:

[0007] This increases the bending strength in the fore-and-aft direction of the vehicle, and suppresses deformation of the upper part of the backrest pad in the fore-and-aft direction of the vehicle when it supports the back of a wheelchair user. This also increases the force that is received by the back and shoulders of the wheelchair user, and suppresses deformation of the upper part of the backrest pad in the fore-and-aft direction of the vehicle.

[0010] The backrest pad of the present invention comprises a base portion having a backrest surface for supporting the back of a wheelchair user, an upper base portion having a roughly rectangular parallelepiped shape protruding from the base portion in the opposite direction to the backrest surface at an upper part of the base portion, and a lower base portion having a roughly quadrangular pyramid shape protruding from the base portion in the opposite direction to the backrest surface at a lower part of the base portion, wherein the groove portion is formed on the underside of the upper base portion, the reinforcing member is embedded in the base portion and is composed of the upper portion, the lower portion, and a central portion between the upper portion and the lower portion, and the length of the upper portion of the reinforcing member may be more than half the length from the upper end of the groove portion to the top of the base portion.

[0011] This makes it possible to further suppress deformation of the upper portion of the backrest pad in the fore-and-aft direction of the vehicle. Effect of the Invention

[0012] The present invention can suppress deformation of the backrest pad when it supports the back of a wheelchair user. [Brief description of the drawings]

[0013] [Figure 1] 1 is a perspective view showing a backrest pad according to an embodiment attached to a horizontal handrail of a vehicle compartment, and a wheelchair user seated in a wheelchair in the vehicle compartment. FIG. [Diagram 2] FIG. 2 is a perspective view showing a backrest pad according to the embodiment. [Diagram 3] 2 is a plan cross-sectional view of the backrest pad of the embodiment, taken along line AA of FIG. 1. [Figure 4] 2 is a side cross-sectional view of the backrest pad of the embodiment, taken along line BB in FIG. 1. [Diagram 5] 2 is a side cross-sectional view of the backrest pad of the embodiment, taken along line CC shown in FIG. 1. [Figure 6] FIG. 13 is a perspective view showing a backrest pad according to another embodiment. [Figure 7] 7 is a side cross-sectional view of a backrest pad according to another embodiment, taken along line DD in FIG. 6. [Figure 8] 7 is a side cross-sectional view of a backrest pad of another embodiment, taken along the E-E cross section shown in FIG. 6. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0014] Hereinafter, the backrest pad 10 of the embodiment will be described with reference to the drawings. First, the vehicle 100 to which the backrest pad 10 is attached will be described with reference to FIG. 1. The arrows FR, UP, and RH shown in each figure indicate the forward direction (travel direction), upward direction, and rightward direction of the vehicle 100, respectively. The opposite directions of the arrows FR, UP, and RH indicate the rearward direction, downward direction, and leftward direction of the vehicle. Hereinafter, when the directions of front-rear, left-right, and up-down are simply used for the description, they indicate front-rear in the front-rear direction of the vehicle, left-right in the left-right direction of the vehicle (vehicle width direction), and up-down in the up-down direction of the vehicle, unless otherwise specified. In the following description, a bus, which is a shared vehicle, will be described as an example of the vehicle 100, but the vehicle 100 may be of other types of vehicles.

[0015] 1, vehicle 100 has a driver's cab 101 at the front where the driver sits, and a passenger compartment 102 at the rear where passengers sit. A driver's seat 103 is provided in the driver's cab 101, and the driver's cab 101 and the passenger compartment 102 are separated by a partition wall 109 attached to the rear of the driver's seat 103. Partition wall 109 has a lower wall portion 111 and an upper wall portion 110 that protrudes further rearward than the lower wall portion 111 toward the vehicle rear.

[0016] The vehicle compartment 102 includes a floor 104, a right wall 105 on the right side of the vehicle, and a door opening 106 on the left side of the vehicle. The door opening 106 is opened and closed by a door (not shown), and is an entrance and exit point for passengers to get on and off the vehicle compartment 102. FIG. 1 shows a state in which the door is open and the door opening 106 is exposed. A slope 107 is provided at the bottom of the door opening 106 for passengers getting on and off in wheelchairs 80. In addition, a wheelchair loading space 108 for loading wheelchairs 80 is provided on the floor 104 behind the partition wall 109.

[0017] Attached to the rear of the partition wall 109 are a vertical handrail 112 rising from the floor 104 and a horizontal handrail 113 that bends to the right from the upper end of the vertical handrail 112 and extends toward the right side of the vehicle along the rear surface of the partition wall 109. The right end of the horizontal handrail 113 is connected to a handrail 114 that is attached to the right wall 105 and extends in the fore-and-aft direction of the vehicle.

[0018] A backrest pad 10 is attached to the horizontal handrail 113. The backrest pad 10 is a structure that is sandwiched between the partition wall 109 and the back 91 of the wheelchair user 90 seated in the wheelchair 80 to support the back 91 of the wheelchair user 90. The backrest pad 10 has a backrest surface 12 that supports the back 91 of the wheelchair user 90 and a groove portion 40 that can be hooked onto the horizontal handrail 113. When the backrest pad 10 is attached to the horizontal handrail 113 by hooking the groove portion 40 onto the horizontal handrail 113 as shown in FIG. 1, the backrest surface 12 of the backrest pad 10 faces the rear of the vehicle, and the upper base portion 20 and the lower base portion 30 arranged on the vehicle front side of the backrest pad 10 abut against the vehicle rear surfaces of the upper wall portion 110 and the lower wall portion 111 of the partition wall 109, respectively. The structure of the backrest pad 10 will be described in detail later.

[0019] The wheelchair user 90, seated in the wheelchair 80, boards the vehicle compartment 102 through the slope 107 while still seated in the wheelchair 80. The wheelchair user 90 then parks the wheelchair 80 in the wheelchair loading space 108 facing backward so that the back 91 is in contact with the backrest surface 12 of the backrest pad 10, and fixes the wheelchair 80 to the handrail 114 with the belt 84. As a result, the backrest pad 10 is sandwiched between the partition wall 109 and the back 91 of the wheelchair user 90 seated in the wheelchair 80, and absorbs the impact force from the wheelchair user 90 toward the front of the vehicle when the vehicle 100 suddenly stops or is hit from the front.

[0020] Next, the detailed structure of the backrest pad 10 will be described with reference to Figs. 2 to 5. As shown in Fig. 2, the backrest pad 10 includes a base portion 11, an upper base portion 20, and a lower base portion 30. The base portion 11, the upper base portion 20, and the lower base portion 30 are integrally formed from a flexible material such as urethane. In the following description, the front, rear, upper, lower, left, and right directions of the vehicle 100 will be described as the front, rear, upper, lower, left, and right directions of the backrest pad 10, respectively, when the backrest surface 12 of the backrest pad 10 is attached to the horizontal handrail 113 so as to face the rear of the vehicle as shown in Fig. 1. In addition, UP, FR, and RH in each drawing indicate the upper, front, and right directions of the backrest pad 10.

[0021] As shown in Figs. 2 and 3, the base portion 11 includes a backrest surface 12 on the rear side, left and right side portions 13, an upper portion 14, and a lower portion 15. The base portion 11 is a substantially rectangular parallelepiped shape whose vertical length is longer than its horizontal width. As shown in Fig. 3, the backrest surface 12 of the base portion 11 is a surface that receives an impact force from the back 91 of the wheelchair user 90. The backrest surface 12 is gently curved such that the central portion in the horizontal direction is slightly recessed toward the front of the vehicle so as to fit the back 91 of the wheelchair user 90. The left and right side portions 13 are portions that protrude outward from the side surfaces of the upper base portion 20. When the side portions 13 receive an impact force from the wheelchair user 90, they curve to receive the sides of the back 91 of the wheelchair user 90. As shown in Figs. 2 and 3, a reinforcing member 60 is attached inside the base portion 11. The reinforcing member 60 will be described in detail later.

[0022] As shown in Figs. 2, 4 and 5, the upper base 20 is an approximately rectangular parallelepiped-shaped portion that protrudes forward from the upper portion of the base 11 in the opposite direction to the backrest surface 12. The upper base 20 is surrounded by an upper surface 21, an upper side surface 22, an upper front surface 23 and a lower surface 24. The upper surface 21 is a surface that continues to the upper portion 14 of the base 11. The upper side surface 22 is a surface that continues to the side portion 13 of the base 11. The upper front surface 23 is a plane that is approximately parallel to the backrest surface 12 of the base 11, and is a surface that abuts against the vehicle rear surface of the upper wall portion 110 of the partition wall 109 when the backrest pad 10 is attached to the horizontal handrail 113. The upper front surface 23 is provided with two recesses 25 and 26. The lower surface 24 is provided with an inverted U-shaped groove 40 that is open downward.

[0023] The lower base 30 is a substantially quadrangular pyramid-shaped portion that protrudes forward from the base 11 in the opposite direction to the backrest surface 12 at the lower portion of the base 11. The lower base 30 is surrounded by an upper inclined surface 34 and a lower inclined surface 33 on the front side, a lower side surface 35, a lower front surface 32, and a lower end surface 36. The upper inclined surface 34 is a surface that extends diagonally downward and forward from the inner surface of the rear side of the groove 40 of the upper base 20 at the front side of the base 11. The lower inclined surface 33 is a surface that extends diagonally downward and forward from the lower end of the upper inclined surface 34 at a larger inclination angle than the upper inclined surface 34. The space formed by the upper inclined surface 34, the lower inclined surface 33, and the lower surface 24 of the upper base 20 forms a space in which the horizontal handrail 113 moves up and down when the backrest pad 10 is attached to the horizontal handrail 113.

[0024] The lower side surface 35 is a surface that continues to the side portion 13 of the base portion 11. The lower end surface 36 is a portion that continues to the lower portion 15 of the base portion 11. The lower front surface 32 protrudes forward beyond the upper front surface 23 of the upper pedestal portion 20, is a plane that is approximately parallel to the backrest surface 12 of the base portion 11, and is the surface that abuts against the vehicle rear surface of the lower wall portion 111 of the partition wall 109 when the backrest pad 10 is attached to the horizontal handrail 113. A recess 31 is provided in the lower front surface 32.

[0025] As shown in FIG. 4, a U-shaped bracket 43 is embedded in the groove 40 of the upper base 20 and the upper end of the upper inclined surface 34 of the lower base 30, and the bracket 43 is molded so that the surface is flush with the inner surface 41 of the groove 40 (see FIG. 5) and the upper inclined surface 34. The front end of the bracket 43 is bent and embedded in the lower surface 24 of the upper base 20. The bracket 43 is made of a material such as resin or hard rubber, and transmits the load of the backrest pad 10 to the horizontal handrail 113 when it is hung on the horizontal handrail 113. As shown in FIGS. 2 and 4, the bracket 43 is provided in the center of the groove 40, and is not provided on the left and right outer parts of the groove 40 in the width direction.

[0026] As shown in Figs. 3 and 4, a reinforcing member 60 is embedded in the widthwise outer portion of the base portion 11 that is on the widthwise outer side of the central portion where the bracket 43 is disposed. The reinforcing member 60 is a metal longitudinal member with an L-shaped cross section, and is embedded so as to extend in the vertical direction. As a result, when the wheelchair user 90 parks the wheelchair 80 in the wheelchair mounting space 108, the position of the reinforcing member 60 is separated in the widthwise direction from the position of the spine of the wheelchair user 90, so that the wheelchair user 90 can be prevented from feeling the hardness of the reinforcing member 60. Also, as shown in Fig. 3, the reinforcing member 60 is embedded in a position separated by a distance D forward from the backrest surface 12 so that the wheelchair user 90 does not feel the hardness of the reinforcing member 60 on the back 91. The distance D can be set arbitrarily. The distance D may be, for example, 10 mm or more.

[0027] As shown in Figs. 4 and 5, the reinforcing member 60 is embedded in the base 11 so as to extend in the up-down direction across the upper and lower sides of the groove 40. The reinforcing member 60 is composed of an upper portion 62 above the groove 40, a lower portion 63 below the groove 40, and a central portion 61 between the upper portion 62 and the lower portion 63. The central portion 61 is a portion of length L1 that overlaps with the groove 40 in the front-rear direction. The length L2 of the upper portion 62 of the reinforcing member 60 is about half the length H0 from the upper end of the groove 40 to the upper portion 14 of the base 11, and is longer than the length L3 of the lower portion 63. This makes it possible to suppress the upper portion 14 of the backrest pad 10 from bending forward and deforming when the backrest surface 12 receives the shoulders 92 from the back 91 of the wheelchair user 90.

[0028] As described with reference to FIG. 1, when the backrest pad 10 is attached to the horizontal handrail 113, the backrest pad 10 is sandwiched between the front partition wall 109 and the back 91 of the wheelchair user 90 seated in the wheelchair 80 at the rear. When the vehicle 100 suddenly stops or crashes head-on, the forward impact force from the wheelchair user 90 is transmitted to the backrest surface 12. The impact force transmitted to the backrest surface 12 is transmitted from the backrest surface 12 to the horizontal handrail 113 via the central portion 61 of the reinforcing member 60. The impact force transmitted to the upper portion of the backrest surface 12 acts to bend and deform the upper portion 14 of the backrest pad 10 forward. Here, the upper portion 62 of the reinforcing member 60 extending upward from the groove portion 40 receives the forward impact force and suppresses the forward deformation of the upper portion 14 of the backrest pad 10. This makes it possible to prevent the head 93 of the wheelchair user 90 from moving forward when the vehicle 100 suddenly stops or crashes head-on. Also, a part of the impact force transmitted to the backrest surface 12 is transmitted to the upper base portion 20, and is transmitted from the upper front surface 23 of the upper base portion 20 to the upper wall portion 110 of the partition wall 109. The upper base portion 20 then collapses in the front-rear direction of the vehicle to absorb the impact force. Similarly, a part of the impact force transmitted to the backrest surface 12 is transmitted to the lower base portion 30, and is transmitted from the lower front surface 32 of the lower base portion 30 to the lower wall portion 111 of the partition wall 109. The lower base portion 30 then collapses in the front-rear direction of the vehicle, similar to the upper base portion 20, to absorb the impact force.

[0029] As described above, the backrest pad 10 prevents the wheelchair user 90 from feeling the hardness of the reinforcing member 60 on the back 91, while preventing the upper portion 14 from bending and deforming forward when the vehicle 100 suddenly stops or undergoes a head-on collision, and absorbs the impact force.

[0030] Furthermore, the length of the upper portion 62 of the reinforcing member 60 is approximately half the length H0 from the upper end of the groove portion 40 to the upper portion 14 of the base portion 11, and is longer than the lower portion 63. Therefore, when the vehicle 100 suddenly stops or undergoes a frontal collision, the upper portion 14 of the backrest pad 10 is effectively prevented from bending and deforming forward, and the head 93 of the wheelchair user 90 is effectively prevented from moving forward.

[0031] In the above explanation, the length of the upper portion 62 of the reinforcing member 60 has been described as approximately half the length H0 from the upper end of the groove portion 40 to the upper portion 14 of the base portion 11, but this is not limited to this and may be longer than this.

[0032] In the above description, the backrest pad 10 is attached to the horizontal handrail 113 of the vehicle compartment 102 so that the backrest surface 12 of the backrest pad 10 faces the rear of the vehicle, but this is not limited to the above. For example, if a partition wall 109 is disposed at the rear of the vehicle, the horizontal handrail 113 may be disposed in front of the partition wall 109, and the backrest pad 10 may be attached to the horizontal handrail 113 so that the backrest surface 12 faces the front of the vehicle. In this case, the backrest pad 10 is sandwiched between the rear partition wall 109 and the back 91 of the wheelchair user 90 seated in the wheelchair 80 at the front, and receives the impact force from the wheelchair user 90 toward the rear when the vehicle 100 suddenly starts or is crashed from behind. At this time, the upper part 14 of the backrest pad 10 is prevented from bending and deforming toward the rear by the reinforcing member 60, so that the head 93 of the wheelchair user 90 can be prevented from moving backward.

[0033] In the above description, the reinforcing member 60 has been described as a metal member having an L-shaped cross section, but the cross section is not limited to an L shape and may have other cross sections, such as a square cross section, a round cross section, or a cylindrical cross section, and may be made of a material such as hard plastic instead of metal.

[0034] Next, a backrest pad 50 according to another embodiment will be described with reference to Figures 6 to 8. The same parts as those of the backrest pad 10 previously described with reference to Figures 1 to 5 are given the same reference numerals and will not be described. The backrest pad 50 has a reinforcing member 70 disposed in a portion where the thickness between the backrest surface 12 and the upper inclined surface 34 is equal to or less than a predetermined value and in a portion that covers the upper end of the groove portion 40. Other parts have the same structure as the backrest pad 10 previously described.

[0035] As shown in Figs. 7 and 8, the reinforcing member 70 is composed of an upper portion 72 above the groove portion 40, a lower portion 73 below the groove portion 40, and a central portion 71 between the upper portion 72 and the lower portion 73. The central portion 71 is a portion of length L1 that overlaps with the groove portion 40 in the front-rear direction. The length L4 of the upper portion 72 is shorter than the length L2 of the upper portion 62 of the reinforcing member 60 of the backrest pad 10. The length L4 is a length that extends slightly above the upper end of the bracket 43 provided in the groove portion 40, and is a length that can transmit the load received by the backrest surface 12 to the bracket 43. The length of the lower portion 73 is the same length L3 as the lower portion 63 of the backrest pad 10. The length L3 of the lower portion 63 is longer than the length L4 of the upper portion 72.

[0036] When the backrest pad 50 is attached to the horizontal handrail 113, the upper front surface 23 of the upper base portion 20 abuts against the front partition wall 109. The impact force transmitted to the upper portion of the backrest surface 12 is transmitted from the upper portion 14 of the backrest pad 10 through the upper base portion 20 and the upper front surface 23 to the partition wall 109. This prevents the upper portion 14 of the backrest pad 50 from deforming forward when a forward impact force is applied from the wheelchair user 90. In addition, the impact force transmitted to the backrest surface 12 is transmitted from the backrest surface 12 to the horizontal handrail 113 via the center portion 71 of the reinforcing member 70. This prevents the head 93 of the wheelchair user 90 from moving forward when the vehicle 100 suddenly stops or crashes head-on.

[0037] In addition, since the backrest pad 50 has a reinforcing member 70 disposed in the portion where the thickness between the backrest surface 12 and the upper inclined surface 34 is below a predetermined value and in the portion covering the upper end of the groove portion 40, the length of the reinforcing member 70 can be shortened to achieve weight reduction. [Explanation of symbols]

[0038] 10,50 backrest pad, 11 base portion, 12 backrest surface, 13 side portion, 14 upper portion, 15 lower portion, 20 upper base portion, 21 upper surface, 22 upper side surface, 23 upper front surface, 24 lower surface, 25, 26, 31 recess, 30 lower base portion, 32 lower front surface, 33 lower inclined surface, 34 upper inclined surface, 35 lower side surface, 36 lower end surface, 40 groove portion, 41 inner surface, 43 bracket, 60,70 reinforcing member, 61,71 center portion, 62,72 upper portion, 63,73 lower portion, 80 wheelchair, 84 belt, 90 wheelchair user, 91 back, 92 shoulder, 93 head, 100 vehicle, 101 driver's cab, 102 passenger compartment, 103 driver's seat, 104 Floor, 105 right wall, 106 door opening, 107 slope, 108 wheelchair loading space, 109 partition wall, 110 upper wall section, 111 lower wall section, 112 vertical handrail, 113 horizontal handrail, 114 handrail.

Claims

1. A backrest pad made of a flexible material is attached to a horizontal handrail arranged along the wall of a vehicle compartment, and is sandwiched between the wall and the back of a wheelchair user seated in the wheelchair to support the back of the wheelchair user. A reinforcing member provided on an outer portion in the width direction and extending in the up-down direction; A groove portion that opens downward and can be hooked onto the horizontal handrail, the reinforcing member extends in the up-down direction across the upper and lower sides of the groove, and a length of an upper portion above the groove is longer than a length of a lower portion below the groove; Features a backrest pad.

2. 2. The backrest pad according to claim 1, A base portion having a backrest surface for supporting the back of the wheelchair user; an upper base portion having a generally rectangular parallelepiped shape and protruding from the base portion in an upper portion of the base portion in a direction opposite to the backrest surface; a lower base portion having a substantially quadrangular pyramid shape protruding from the base portion in a lower portion of the base portion in a direction opposite to the backrest surface, The groove portion is formed on a lower surface of the upper base portion, the reinforcing member is embedded in the base portion and is configured with the upper portion, the lower portion, and a central portion between the upper portion and the lower portion, a length of the upper portion of the reinforcing member is equal to or greater than half the length from the upper end of the groove portion to the upper portion of the base portion; Features a backrest pad.

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