JP2012231840A - Cross bar member for wheelchair and folding type wheelchair - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cross bar member for a folding type wheelchair, which adjusts a seat width and a seat surface height.SOLUTION: The cross bar member (100) includes bars (101, 102). The bars (101, 102) include: first rods (110, 130) where first long holes (113, 133) and a plurality of first adjustment holes (114, 134) are arrayed in the longitudinal direction; and second rods (120, 140) where second long holes (123, 143) and a plurality of second adjustment holes (124, 144) are arrayed in the longitudinal direction. The first adjustment holes and the second adjustment holes corresponding to the first adjustment holes are made coincident with each other and the lengths of the bars can be adjusted. The intersection angle of the bars are fixed by a center shaft (151) which can penetrate the long holes while the respective long holes are partially mutually superimposed and a fastening tool (151a) to fasten the two bars by engagement with the center shaft. On the other hand, the center shaft can be relatively slid in the respective long holes by releasing the fastening, and the lengths of the respective bars and the intersection angle of the both bars can be adjusted.

Description

  The present invention relates to a crossbar member for a wheelchair in which a seat width and a seating surface height on which a occupant sits can be adjusted, and a folding wheelchair provided with the crossbar member.

  A wheelchair user may not fit the seat width and seat height of the wheelchair as the body shape changes due to growth or the like. Moreover, it is necessary to adjust the seat width and the seat surface height of a wheelchair provided in a hospital or the like according to the patient's body shape. If the seat width and the seat surface height do not match, the passenger's comfort is impaired, and the operation becomes difficult and dangerous. Therefore, there is a need for a wheelchair that can easily adjust the seat width and seat height of the wheelchair, and various attempts have been made for that purpose.

  Patent Document 1 discloses a sheet width adjusting device. The seat width adjusting device (2) is formed by mutual joining of connecting pipes (21), and is fixed with bolts and nuts. An adjustment pipe (22) is fitted into each end of the connection pipe (21), and the adjustment pipe (22) can adjust the length of expansion and contraction in the corresponding connection pipe (21). The surface of the connecting pipe (21) is provided with a large number of through-hole adjusting holes, and the surface of the adjusting pipe (22) is also provided with a large number of adjusting holes. After adjusting the length of expansion / contraction of the adjusting pipe (22), the adjusting pipe (22) is inserted into the corresponding adjusting hole with a bolt and a nut, and the adjusting pipe (22) is tightened and fixed on the connecting pipe (21). The end of each adjusting pipe (22) is a joint (25), and the adjusting pipe (22) is attached on the frame (11).

Utility Model Registration No. 30686675

  However, in the seat width adjusting device of Patent Document 1, two adjusting pipes are inserted into one connecting pipe, and when adjusting the expansion and contraction of the sheet width adjusting device, the intersection of the connecting pipes is the center. Therefore, it is necessary to adjust the positions of the adjusting pipes at both ends of the connecting pipe so as to be positioned at each other. In other words, in order to adjust the seat width of the wheelchair, it is necessary to individually adjust the position of the adjustment pipe at four locations, which is a very time-consuming operation, and the seat width and the seat surface height depend on the seat occupant. It is difficult to fine-tune it to suit. Furthermore, since at least six pipes are required to form the crossbar structure, further improvement is required in terms of material cost.

  An object of the present invention is to provide a crossbar member and a crossbar member that can easily adjust the seating width and seating surface height of a wheelchair to fit a occupant and have a simple and strong structure. To provide a folding wheelchair.

  The crossbar member according to claim 1 includes a first bar (101) and a second bar (102) connected in a crossed state by a fastener, and a pair of side frames (10) included in the wheelchair (10). 11) A crossbar member (100) for a folding wheelchair disposed between the first bar (101), wherein the first elongated hole (113) and the plurality of first adjusting holes (114) are long. A plurality of first rods (110) arranged in a direction, a second long hole (123), and a plurality of second adjustment holes (124) arranged in a longitudinal direction. One first adjustment hole selected from the first adjustment holes (114) and one second adjustment hole (124) corresponding to the selected first adjustment hole are made to coincide with each other. Insert the first bar length adjustment pin (152) through Thus, the length of the first bar can be adjusted, and the second bar (102) has a first elongated hole (133) and a plurality of first adjustable holes (134) arranged in the longitudinal direction. The rod (130) includes a second rod (140) in which a second elongated hole (143) and a plurality of second adjustment holes (144) are arranged in the longitudinal direction, and the plurality of first adjustment holes (134). ) And a second adjustment hole (144) corresponding to the selected first adjustment hole, and the second bar length adjustment is made for both the matched holes. The length of the second bar can be adjusted by inserting the pin (154), and the fastener includes the first and second elongated holes (113, 123) of the first bar and the second bar. The first and second elongated holes (133, 143) are partially interpolymerized A central shaft (151) that can pass through the two long holes, and a fastening tool (151a) that engages with the central shaft and can fasten the first bar and the second bar. While the crossing angle between the first bar and the second bar can be fixed, the central shaft (151) can be slid relative to each other in the elongated holes of the first and second bars by releasing the tightening by the tightening tool. Thus, the length of each bar and the crossing angle of both bars can be adjusted.

  The crossbar member according to a second aspect is the crossbar member according to the first aspect, wherein the first rod (110, 130) is the second rod (101, 102) in the first and second bars (101, 102). 120, 140) at the tip (110b, 130b), and the first elongated hole (113, 133) is located on the tip (110b, 130b) side of the plurality of first adjustment holes (114, 134). The second rods (120, 140) are connected to the first rods (110, 130) at the tip portions (120b, 140b), and the plurality of second adjustment holes (124, 144) are formed in the first rods (110, 130). It is characterized by being positioned closer to the tip (120b, 140b) side than the second elongated hole (123, 143).

  The crossbar member according to claim 3 is the crossbar member according to claim 2, wherein the plurality of first adjustment holes (114, 134) and the plurality of second adjustment holes (124, 144) are equally spaced from each other. The n-th adjusting hole (114-n, 134-n) and the second rod (120, 140) from the base end (110a, 130a) side of the first rod (110, 130) are disposed. The first rod (110, 130) and the second rod (120, 140) so that the n-th adjustment hole (124-n, 144-n) from the base end (120a, 140a) side matches. The connection position is adjusted.

  The crossbar member according to claim 4 is the crossbar member according to any one of claims 1 to 3, wherein the first rod (110, 130) and the second rod (120, 140) are hollow pipes. The second rod (120, 140) is inserted into the first rod (110, 130).

  The crossbar member according to claim 5 is the crossbar member according to any one of claims 1 to 4, wherein the first bar (101) includes a pair of rod main body portions (111, 121) extending in parallel. The first bar (101) and the second bar (102) so that the first bar (101) sandwiches the second bar (102) between the pair of rod body portions (111, 121). ) And the intersection.

  A foldable wheelchair according to claim 6 comprises the crossbar member (100) of any one of claims 1 to 5, and by adjusting the length and crossing angle of the crossbar member (100), The seat width (L) and the seat surface height (H) can be adjusted.

  According to the first aspect of the present invention, the bar is composed of the first rod and the second rod, and the first adjustment hole and the second adjustment hole are appropriately selected and matched, and both the matched holes are matched. By inserting the bar length adjusting pin, the first rod and the second rod are connected while adjusting the length of the bar. Then, the first bar and the second bar are formed by penetrating the central axis of the first elongated hole and the second elongated hole of each of the first and second bars through the central axis and engaging the fastening tool with the central axis. Secured by bars and fasteners. That is, the crossbar member of the present invention can adjust the bar length and crossing angle with a simple structure. Further, when adjusting the seat width and the seat surface height, if the bar length adjusting pin in the first adjusting hole and the second adjusting hole is detached and the tightening tool is loosened, the central axis becomes the first elongated hole and the second adjusting hole. Relative sliding in the long hole is possible. This sliding movement of the central axis allows the bar length and the crossing angle to be adjusted simultaneously (or one at a time) without completely detaching the central axis. Can be easily fine-tuned according to the occupant's body shape.

  According to the second aspect of the invention, in addition to the effect of the first aspect of the invention, the user effectively selects the first adjustment hole selected by polymerizing the first long hole and the second long hole, and the first adjustment hole. The second adjustment hole corresponding to can be adapted.

  According to the third aspect of the invention, in addition to the effect of the second aspect of the invention, the first adjustment holes are arranged at equal intervals and the nth adjustment holes from the base end side are matched. By connecting the rod and the second rod, when extending or contracting each bar, the first rod and the second rod are slid relative to the central axis according to the position of the selected adjustment hole, The distance from the axis (intersection) to the base end of the first rod and the distance from the central axis to the base end of the second rod can be simultaneously changed by the same distance. Therefore, the user can adjust the seat width of the wheelchair step by step with a simple operation.

  According to the invention of claim 4, in addition to the effect of any of the inventions of claims 1 to 3, the strength of the crossbar member is maintained while the rod is configured as an extrapolation pipe and an interpolation pipe. The weight can be reduced. In addition, since the length of the bar can be adjusted by sliding the extrapolation pipe with respect to the interpolation pipe, it is possible to easily align both rods (the extrapolation pipe and the interpolation pipe). .

  According to the invention described in claim 5, in addition to the effects of any one of claims 1 to 4, the first bar is disposed so as to sandwich the second bar, whereby the strength of the crossbar member is increased. This makes it possible to provide a stable sitting comfort to the occupant.

  According to the invention described in claim 6, since the crossbar member having the effect of any one of the inventions of claims 1 to 5 is provided, the seat width adapted to the body shape of the occupant with a simple structure and It is possible to easily adjust the seating surface height.

The folding wheelchair of one Embodiment of this invention is shown, (a) is a perspective view, (b) is a rear view. The perspective view of the principal part (a frame and a crossbar member) of the foldable wheelchair of FIG. The side view of the principal part (a frame and a crossbar member) of the foldable wheelchair of FIG. The front view of the principal part (a frame and a crossbar member) of the folding wheelchair of FIG. The disassembled perspective view of the crossbar member of the foldable wheelchair of FIG. It is a figure which shows the extrapolation pipe and the interpolation pipe which comprise each bar of the foldable wheelchair of FIG. 1, (a) is a side view of a 1st extrapolation pipe and a 1st interpolation pipe, (b) is the 1st The top view of 1 extrapolation pipe and the 1st interpolation pipe, (c) is the side view of the 2nd extrapolation pipe and the 2nd interpolation pipe, (b) is the plane of the 2nd extrapolation pipe and the 2nd interpolation pipe Figure. It is the schematic of the cross-sectional view of the crossbar member of the folding wheelchair of FIG. 1, (a) is the shortest form of a bar, (b) is the form which the bar extended in the 1st step, (c) Two-stage elongated form, (d) is the longest (third-stage elongated) form of the bar. The form which changes the seat width and seat surface height of the crossbar member of the folding wheelchair of FIG. 1 is shown, (a) is an initial form, (b) is a 2nd form, (c) is a 3rd form, (D) is a 4th form. The rear view of the folding form of the foldable wheelchair of FIG.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In addition, the shape of each figure referred in the following description is a conceptual diagram or a schematic diagram for explaining a suitable shape dimension, and a dimension ratio etc. do not necessarily correspond with an actual dimension ratio. That is, the present invention is not limited to the dimensional ratio in the drawings.

  As shown in FIG. 1A, the folding wheelchair 10 of one embodiment includes a pair of side frames 11 that constitute both side portions of the wheelchair 10, and a main wheel 18 is pivoted on both side frames 11. It is supported. The side frame 11 includes a lower seat frame 11a and an upper back frame 11b of the wheelchair 10, and the cross member 100 of the present invention is provided on the seat frame 11a side. In each side frame 11, the seat frame 11 a includes an upper frame 12 that extends in a substantially horizontal direction of the wheelchair 10, a bottom frame 13 that is substantially parallel to the upper frame 12 and positioned below the upper frame 12, and the upper frame 12 and the bottom portion. A front frame 13 extending in the vertical direction so as to connect the frame 13 to the front side of the wheelchair 10, and a rear frame 14 extending in the vertical direction so as to connect the upper frame 12 and the bottom frame 13 on the rear side of the wheelchair 10; Consists of. As shown in FIG. 1B, the crossbar member 100 is constructed between the pair of side frames 11 and connects the side frames 11. As will be described later, the width between the side frames 11 is determined by adjusting the width and height of the crossbar member 100 (bar length and crossing angle). And the sheet | seat 18 is stretched by the upper end parts 122 and 142 of the crossbar member 100, and the backrest 19 is stretched by the backrest frame 11b. In the present embodiment, the seat (seat surface) 18 and the backrest 19 are provided with a width adjusting belt, and by adjusting the belt, the width can be adjusted according to the change in the width between the side frames 11. It is configured.

  Next, with reference to FIGS. 2 to 4, the side frame 11 and the crossbar member 100, which are the main parts of the present invention, will be described in more detail. As described above, the crossbar member 100 is located below the seating surface 18 and connects the both side frames 11. The crossbar member 100 includes a first bar 101 (one bar) and a second bar 102 (the other bar) that intersect each other. As will be described later, the seat width L and the seat surface height H (see FIG. 4) of the wheelchair 10 can be adjusted by changing the lengths and crossing angles of the first bar 101 and the second bar 102. In this specification, the distance between both side frames 11 is defined as a seat width L, and the distance from the bottom frame 13 to the seat surface 18 (that is, the upper end portions 122 and 142) is defined as a seat surface height H.

  As shown in FIGS. 2 and 3, the lower ends 112 and 132 of the first bar 101 and the second bar 102 are provided on each bottom frame 13 so as to be rotatable up and down around the extending direction of the bottom frame 13. The shaft is supported by the shaft support portion 13a. The upper ends 122 and 142 of the first bar 101 and the second bar 102 are respectively arranged on the upper frame 12 of each side frame 11 and slide up and down inserted in each front frame 14. Each is connected to a possible sliding shaft 16. When the length and the crossing angle of the bars 101 and 102 are changed, the lower end portions 112 and 132 of the bar 101 are rotated with respect to the shaft support portion 13a, and the upper end portions 122 and 142 of the bars 101 and 102 are (sliding). The seat width L and the seat surface height H of the wheelchair 10 are changed by moving up and down (with the moving part 16).

  As shown in FIGS. 2 and 4, the first bar 101 and the second bar 102 have the same length and intersect at a substantially intermediate position between the side frames 11. The first bar 101 includes a first insertion pipe (first rod) 110 having a pair of pipe body portions (rod body portions) 111 and a first insertion pipe having a pair of pipe body portions (rod body portions) 121 ( The first extrapolating pipe 110 and the first interpolating pipe 120 are fixed via a cover member 153 by first bar length adjusting pins 152 (and nuts 152a), respectively. On the other hand, the second bar 102 includes a second extrapolated pipe (first rod) 130 and a second interpolated pipe (second rod) 140. The second extrapolated pipe 130 and the second interpolated pipe 140 are It is fixed via a cover member 155 by a 2-bar length adjustment pin 154 (and a nut 154a). And the 1st bar 101 and the 2nd bar 102 cross | intersect so that the 2nd bar 102 may be inserted | pinched between a pair of pipe main-body part 111,121. At this intersection, the first bar 101 and the second bar 102 are fastened by fasteners (a central shaft 151 and a nut (fastening tool) 151a).

  FIG. 5 is an exploded perspective view of the crossbar member 100 of the present embodiment. As described above, the crossbar member 100 includes the first bar 101 and the second bar 102. The first bar 101 is disassembled into the first extrapolation pipe 110 and the first interpolation pipe 120, and the second bar 102 is The second extrapolated pipe 130 and the second interpolated pipe 140 are disassembled.

  The first extrapolated pipe 110 of the first bar 101 includes a pair of pipe body portions 111 having a rectangular (hollow) cross-sectional shape, and the pair of pipe body portions 111 are substantially parallel to the distal end portion 110b from the proximal end portion 110a. It extends. At the base end portion 110a of the first extrapolation pipe 110, a lower end portion 112 extends in a direction orthogonal to both the pipe main body portions 111, and each distal end portion 110b of the first extrapolation pipe 110 is formed by the first interpolation pipe 110a. Each pipe main body part 121 of 120 is opened inside so that insertion is possible. Each pipe main body 111 is provided with a long hole 113 and a plurality of adjustment holes 114.

  On the other hand, the first insertion pipe 120 of the first bar 101 includes a pair of pipe main body parts 121 having a rectangular (hollow) cross-sectional shape, and the pair of pipe main body parts 121 is approximately from the base end part 120a to the front end part 120b. It extends in parallel. At the base end portion 120 a of the first insertion pipe 120, an upper end portion 122 extends in a direction orthogonal to both the pipe main body portions 121. Each pipe main body 121 is provided with a plurality of adjustment holes 124 and long holes 123.

  Then, the first insertion pipe 120 is inserted into the first extrapolation pipe 110 to adjust the position so that the selected adjustment holes 114 and 124 coincide with each other while at least partially cross-polymerizing the long holes 113 and 123. The first bar length adjusting pin 152 is passed through the selected adjusting holes 114 and 124 through the cover member 153 and fastened with a nut 152a, whereby the first extrapolated pipe 110 and the first inserted pipe 120 are Is fixed. At this time, the intermediate point of the first bar 101 is located at the overlapping portion of the long holes 113 and 123, and the central axis 151 can penetrate the long holes 113 and 123.

  The second extrapolated pipe 130 of the second bar 102 includes a single pipe body 131 having a semicircular (hollow) cross-sectional view extending from the base end portion 130a to the tip end portion 130b. At the base end portion 130 a of the second extrapolation pipe 130, a lower end portion 132 extends in the orthogonal direction of the pipe main body portion 131, and the distal end portion 130 b of the second extrapolation pipe 130 extends from the second extrapolation pipe 140. The pipe main body 141 is opened to be inserted therein. The pipe body 131 is provided with a long hole 133 and a plurality of adjustment holes 134.

  On the other hand, the second insertion pipe 140 of the second bar 102 includes a single pipe main body 141 having a semicircular (hollow) cross-sectional view extending from the base end 140a to the tip end 140b. At the base end portion 140 a of the second insertion pipe 140, an upper end portion 142 extends so as to be orthogonal to the pipe main body portion 141. Each pipe body 141 is provided with a plurality of adjustment holes 144 and long holes 143.

  Then, the second insertion pipe 140 is inserted into the second extrapolation pipe 130, and the positions of the adjustment holes 134 and 144 are adjusted so that the adjustment holes 134 and 144 are matched while at least partially interpolymerizing the long holes 133 and 143. The second extrapolation pipe 130 and the second insertion pipe 140 are connected by passing the two-bar length adjustment pin 154 through the adjustment holes 134 and 144 through the cover member 155 and fastening with the nut 154a. Yes. At this time, the intermediate point of the second bar 102 is located at the overlapping portion of the long holes 133 and 143, and the central axis 151 can penetrate the long holes 133 and 143.

  The central shaft 151 is inserted into the overlapping portion of the long holes 113, 123, 133, and 143 that can be located at the intersection (that is, the middle point) between the first bar 101 and the second bar 102, and at the end of the central shaft 151. By engaging and fastening a nut (clamp) 151a, the first bar 101 and the second bar 102 are fixed in an intersecting state.

  FIGS. 6A and 6B are a side view and a plan view of the first extrapolation pipe 110 and the first interpolation pipe 120 constituting the first bar 101, respectively.

  In the first extrapolation pipe 110, the adjustment holes 114-1, 114-2, 114-3, 114-4 (the nth adjustment hole from the base end part 110a is 114-n in order from the base end part 110a side). And a long hole 113 are provided. Each adjustment hole is arranged at equal intervals with an interval d. The long hole 113 has a width w1 (not including arc portions at both ends), and the width w1 is set to 3d so as to correspond to the distance between the adjustment hole 114-1 and the adjustment hole 114-4. . The distance between the end portion of the long hole 113 on the distal end portion 110b side and the adjustment hole 114-4 on the most distal end portion 110b side is represented by w2. Note that the end portion of the long hole 113 means the center position of the shaft when the central shaft 151 is arranged at the end portion of the long hole, and here refers to a position that does not include the arc portion as shown in the figure. The distance between the end of the long hole 113 on the base end portion 110a side and the first extrapolated pipe base end portion 110a is w3.

  Similarly, the first insertion pipe 120 is provided with a long hole 123 and adjustment holes 124-1, 124-2, 124-3, and 124-4 in this order from the base end 120b side. Each adjustment hole 124 is arranged at equal intervals at intervals d. The long hole 123 has a width w1 (not including arc portions at both ends), and the width w1 is set to 3d so as to correspond to the distance between the adjustment hole 124-1 and the adjustment hole 124-4. . The distance between the end of the long hole 123 on the distal end 120b side and the adjustment hole 124-1 on the most proximal end 120a side is represented by w2. The distance between the end of the long hole 123 on the base end portion 120a side and the first insertion pipe base end portion 120d is w3.

  As will be described later (see FIG. 7), the adjustment holes 114-1, 114-2, 114-3, 114-4 of the first extrapolation pipe 110 are the adjustment holes 124-1, 124- of the first insertion pipe 120. The first extrapolation pipe 110 and the first interpolation pipe 120 are connected so as to match 2, 124-3, and 124-4, respectively. Even if any of the adjustment holes 114-n and 124-n is selected, w1, w2 and w3 of both pipes 110 and 120 are set so that the long holes 113 and 123 partially overlap each other. Yes.

  FIGS. 6C and 6D are a side view and a plan view of the second extrapolation pipe 130 and the second interpolation pipe 140 constituting the second bar 102, respectively. In the second extrapolated pipe 130 and the second interpolated pipe 140, the long holes 133, 143, the adjustment holes 134-1, 134-2, 134-3, 134-4, 144-1, 144-2, 144-3. And 144-4, and the dimensions w1, w2, and w3 are the same as those of the first extrapolation pipe 110 and the first interpolation pipe 120 described above.

  In the present embodiment, d = 8.5 mm, w1 = 25.5 mm, w2 = 40.5 mm, and w3 = 200 mm are set, but the present invention is not limited to this dimension. Further, the crossbar member of the present invention is not limited to the number of adjusting holes, the size and shape of the long holes, and the like of the present embodiment. That is, the number of adjustment holes can be increased or decreased, and the size of the long holes does not need to correspond to the distance (3d) between the adjustment holes. In the present embodiment, the distance between the adjustment holes is set as the equal distance d, but the distance may not be equal. That is, the crossbar member of the present invention only needs to be configured so that the adjustment holes of each pipe match and the long holes are mutually polymerized, and the number, position, and shape of the adjustment holes and the long holes are determined. It can be set arbitrarily.

  Next, a mechanism for adjusting the lengths of the bars 101 and 102 will be described with reference to FIGS. FIG. 7 is a schematic view in which a cover member is omitted for convenience of explanation and a part of the first bar 101 is enlarged. However, the first bar 101 and the second bar 102 have the same length adjusting mechanism. Therefore, the first bar 101 is representatively described here.

  FIG. 7A shows a form in which the length of the first bar 101 is minimized. Here, the adjustment hole 114-1 located closest to the proximal end portion 110a of the first extrapolation pipe 110 and the adjustment hole 124-1 located closest to the proximal end portion 120a of the first insertion pipe 120 are aligned. In addition, the shaft 152 passes through the adjustment holes 114-1 and 124-1. And the long hole 113 and the long hole 123 have overlapped partially, and the central axis 151 has penetrated this mutual superposition | polymerization part. The central shaft 151 is located at the end of the elongated hole 113 on the proximal end portion 110 a side, and is located at the end of the elongated hole 123 on the proximal end portion 120 a side. The distance between the center shaft 151 and the first bar length adjusting pin 152 is w2, and the distances from the ends of the long holes 113, 123 on the base end portions 110a, 120a side to the base end portions 110a, 120a are both w3. Further, the central axis 151 is located in the middle of the first bar 101, and the total length of the first bar 101 is 2w3. Although not shown here, the central axis 151 passes through all of the long holes 113 and 123 of the first bar 101 and the long holes 133 and 143 of the second bar 102.

  When the pipes 110 and 120 are slid in the extending direction from the shortest form shown in FIG. 7A, the first bar 101 is deformed into the forms shown in FIGS. The length can be adjusted. For example, in FIG. 7B, the adjustment holes 114-2 and 124-2 are selected, and the pipes 110 and 120 are slid in the extending direction by the width d, respectively. As shown in FIG. 7B, the first bar length adjusting pin 152 passes through the adjusting holes 114-2 and 124-2, and the central shaft 151 passes through the mutual overlapping portion of the long holes 113 and 123. . At this time, the central axis 151 is relatively moved within the long holes 113 and 123 by the same distance (d) as the displacement (d) of the first bar length adjusting pin 152, so that the central axis 151 and the first bar length are adjusted. The distance between the pins 152 is a constant value (w2). The central axis 151 is located in the middle of the bar 101, and the distances from the central axis 151 to the base end portions 110a and 120a are each w3 + d. The total length of the first bar 101 in FIG. 7B is 2 (w3 + d). By shifting the position of the adjustment hole by one step, both the extrapolated pipe 110 and the interpolated pipe 130 are outside (extend) from the central axis 151. Direction). That is, if the position of the adjustment hole is shifted by one step to the extension side, the entire length of the first bar 101 extends by 2d.

  Similarly, when the positions of the adjustment holes 114 and 124 (inserted through the first bar length adjustment pin 152) are moved step by step, as shown in FIG. 7C and FIG. The entire length of the first bar 101 can be gradually increased by 2d from the length of the shortest state (length 2 (w3 + 4d) in FIG. 7C, length 2 (w3 + 6d) in FIG. 7D)). .

  FIGS. 8A to 8D are schematic views illustrating the form of the wheelchair 10 in which the seat width L and the seating surface height H are adjusted by adjusting the length and the crossing angle of the crossbar member 100. In FIG. 8A, the bars 101 and 102 are in the shortest form (see FIG. 7A), and the bars 101 and 102 form an intersection angle α. The wheelchair 10 has a seat width (width between the side plates 11) L1 and a seat surface height (height from the bottom frame 13 to the upper end portions 122 and 142) H1.

  Next, a procedure for changing the seat width L and the seat surface height H in the wheelchair 10 will be described. First, the fasteners (center shaft 151 and nut 151a) are loosened, and the bar length adjusting pins 152 and 154 are detached from the adjusting holes. Then, the lengths and crossing angles of the bars 101 and 102 are adjusted simultaneously or one by one. When adjusting the length, the central shaft 151 is slid relative to the long holes 113, 123, 133, and 143 without detaching the central shaft 151 from the long holes 113, 123, 133, and 143. That is, with the central shaft 151 held at the intermediate position of the wheelchair 10, the extrapolation pipe 110 is slid with respect to the interpolation pipe 120 (or the interpolation pipe 120 with respect to the extrapolation pipe 110) and selected. Match the adjustment holes. After adjusting the positions of both pipes and the crossing angle of the bars, the bar length adjusting pins 152 and 154 are inserted into the respective adjusting holes, and the central shaft 151 and the nut 151a are fastened to connect the bars 101 and 102 to each other. Fix it. By the above operation, the crossbar is fixed at a predetermined length and crossing angle, and the seat width L and the seating surface height H of the wheelchair 10 are changed. Needless to say, when only the crossing angle is changed, it is only necessary to loosen the fastening between the central shaft 151 and the nut 151a.

  8 (b) to 8 (d) will be described with the form of FIG. 8 (a) as the initial form of the wheelchair 10. FIG. The wheelchair 10 in FIG. 8B is the one in which the lengths of the crossbars 101 and 102 are maximized (see FIG. 7D), and the seat width L2 (> L1) and the seating surface height H2 (> H1) and a crossing angle α. At this time, as the lengths of the crossbars 101 and 102 extend, the sliding shaft 16 slides upward, and the upper end portions 122 and 142 on which the seating surface 18 is mounted are moved upward. From the configuration of FIG. 8B, the wheelchair 10 has a seat width L3 (> L1) and a seat height H1 by increasing the crossing angle to β (> α). It is transformed into the form. That is, this is a form in which only the seat width L is expanded as compared with the initial form. Further, by reducing the crossing angle to γ (<α) from the configuration of the wheelchair 10 in FIG. 8B, the wheelchair 10 has a seat width L1 and a seat surface height H3 (> H1). It is transformed into the form. This is a form in which only the seat surface height H is expanded as compared with the initial form. That is, by adjusting the length and the crossing angle of the cross bars 101 and 102, the user can deform the wheelchair 10 to have a desired seat width L and seat surface height H.

  FIG. 9 shows a folding form of the folding wheelchair 10 of the present embodiment. By loosening the fastening between the central shaft 151 and the nut 151a and rotating the bars 101 and 102 in the direction of reducing the crossing angle, the wheelchair 10 is deformed into the folded form of FIG.

  Hereinafter, the effect of the crossbar member 100 and the folding wheelchair 10 according to an embodiment of the present invention will be described.

  In the crossbar member 100 of the present embodiment, the bars 101 and 102 are constituted by the extrapolation pipes 110 and 130 and the interpolation pipes 120 and 140, and the adjustment holes 114, 124, 134, and 144 are appropriately selected and matched. By doing so, the extrapolated pipes 110 and 130 and the interpolated pipes 120 and 140 are connected and fixed while adjusting the length of the bars 101 and 102. Then, by passing the central shaft 151 through the overlapping portion of the elongated holes 113 and 133 of the extrapolated pipes 110 and 130 and the elongated holes 123 and 143 of the interpolated pipes 120 and 140, and fastening them to the nut (clamp) 151a The first bar 101 and the second bar 102 are fixed at these intersections. That is, the crossbar member 100 of the present embodiment can be configured mainly from the extrapolated pipes 110 and 130 and the second pipes 120 and 140, and the overall structure can be simplified. Further, when adjusting the seat width H and the seat surface height L, the fixing in the adjustment holes 114, 124, 134, and 144 is released, and the fastening between the center shaft 151 and the nut 151a is loosened, thereby the center shaft 151. Are relatively slidable within the long holes 113, 123, 133, and 143. That is, the adjustment of the length of the bars 101 and 102 and the adjustment of the crossing angle are performed simultaneously (or one by one) only by loosening the fastening between the center shaft 151 and the nut 151a and detaching the bar length adjusting pins 152 and 154. )It can be carried out. Further, as described in FIGS. 8A to 8D, the seat width L and the seat surface height H of the wheelchair 10 are set to desired values by adjusting the lengths and crossing angles of the bars 101 and 102. can do. Therefore, the seat width L and the seat surface height H of the wheelchair 10 can be easily fine-tuned according to the body shape of the occupant.

  In the crossbar member 100 of the present embodiment, the plurality of adjustment holes 114 and 134 in the extrapolation pipes 110 and 130 are positioned closer to the base end portions 110a and 130a than the long holes 113 and 133, and the insertion pipes 120 and In 140, the plurality of adjustment holes 124, 144 are positioned closer to the tip portions 120 b, 140 b than the long holes 123, 143. Accordingly, the user can effectively match the selected adjustment holes while forming the mutual polymerization portions of the long holes at an intermediate position. Further, the adjustment holes are arranged at equal intervals, and the nth adjustment holes 114-n and 134-n from the base end portions 110a and 130a side of the extrapolation pipes 110 and 130, and the insertion pipes 120 and 140, respectively. The extrapolation pipes 110 and 130 and the interpolation pipes 120 and 140 are connected so that the n-th adjustment holes 124-n and 144-n from the base end portions 120 a and 140 a side match each other. As a result, when the bars 101 and 102 are expanded and contracted, according to the position of the selected adjustment hole, the center axis 151 of the bars 101 and 102 is extrapolated with respect to the center axis 151 while being held at the intermediate position of the wheelchair 10. The pipes 110 and 130 and the insertion pipes 120 and 140 are slid, and the distance from the central axis 151 (intersection) to the base end portions 110a and 130a of the extrapolation pipes 110 and 130, and the insertion pipes 120 and 140 from the central axis 151. The distances to the base end portions 120a and 140a can be simultaneously changed equally (see FIG. 7). Therefore, the user can adjust the seat width L and the seat surface height H of the wheelchair 10 in a stepwise manner with a simple operation.

  Further, in the crossbar member 100 of the present embodiment, the first bar 101 has a pair of pipe body portions 111 and 121, and the pair of pipe body portions 111 and 121 are the pipe body portions 131 of the second bar 102. , 141 so that the first bar 101 and the second bar 102 intersect with each other. Accordingly, the strength of the wheelchair 10 as a whole is improved by fixing the intersection of the first bar 101 and the second bar 102, and the center of gravity moves downward to provide a stable sitting comfort to the occupant. Enable.

  Therefore, by providing the foldable wheelchair with the crossbar member 100 of the present embodiment, the seating width L and the seating surface height H of the wheelchair can be easily adjusted to fit the occupant, and simple and strong. A wheelchair 10 having a simple structure can be provided.

  The present invention is not limited to the above-described embodiment. For example, the first and second rods of the present invention are not limited to a hollow pipe shape. That is, the shape of the long hole and the adjustment hole can be arbitrarily selected as long as the long hole and the adjustment hole can be drilled, and a long plate material can be employed.

  Although the crossbar member of this embodiment is comprised from the 1st bar provided with a pair of pipe main-body part and the 2nd bar provided with one pipe main-body part, this invention is not limited to this. For example, the first bar may be configured with a single pipe body, or the second bar may be configured with a pair of pipe bodies. Further, the first bar and the second bar can be constituted by three or more pipe body portions. Since the strength of the wheelchair increases and the weight increases as the number of pipe main bodies increases, the number may be arbitrarily set according to the application.

  Furthermore, in the crossbar member of the present embodiment, each side frame of the wheelchair extends in the vertical direction and the intersection of the bars is positioned in the middle of each bar, but the present invention is not limited to this. That is, in the present invention, it is only necessary that the cross-over portion of the long hole is located at the intersection of the bars, the intersection is shifted from the middle of the bar, and the frames on both sides of the wheelchair are inclined in a letter C or inverted letter H. It is also possible to construct a wheelchair of the form.

  The present invention is not limited to the above-described embodiments and modifications, and can be implemented in various modes as long as they belong to the technical scope of the present invention.

10 Folding wheelchair 11 Side frame 18 Seat (seat)
100 Crossbar member 101 First bar 102 Second bar 110 First extrapolated pipe (first rod of first bar)
111 Pipe body (rod body)
112 Lower end 113 long hole (first long hole)
114 adjustment hole (first adjustment hole)
120 1st insertion pipe (2nd rod of the 1st bar)
121 Pipe body (rod body)
122 upper end 123 long hole (second long hole)
124 adjustment hole (second adjustment hole)
130 Second extrapolation pipe (first rod of second bar)
131 Pipe body (rod body)
132 Lower end 133 long hole (first long hole)
134 Adjustment hole (first adjustment hole)
140 2nd insertion pipe (2nd rod of 2nd bar)
141 Pipe body (rod body)
142 upper end 143 long hole (second long hole)
144 Adjustment hole (second adjustment hole)
151 Center shaft 151a Nut (clamp)
152 First bar length adjustment pin 154 Second bar length adjustment pin

Claims (6)

For a folding wheelchair provided with a first bar (101) and a second bar (102) connected in a crossed state by a fastener, and disposed between a pair of side frames (11) provided in the wheelchair (10) A crossbar member (100) of
The first bar (101) includes a first rod (110) in which a first elongated hole (113) and a plurality of first adjusting holes (114) are arranged in a longitudinal direction, and a second elongated hole (123) and The plurality of second adjustment holes (124) includes the second rods (120) arranged in the longitudinal direction, the first adjustment hole selected from the plurality of first adjustment holes (114), and the selected One second adjustment hole (124) corresponding to the first adjustment hole is matched, and the first bar length adjustment pin (152) is inserted into both of the matched holes to thereby increase the length of the first bar. Can be adjusted,
The second bar (102) includes a first rod (130) in which a first long hole (133) and a plurality of first adjustment holes (134) are arranged in a longitudinal direction, and a second long hole (143) and The plurality of second adjustment holes (144) includes the second rods (140) arranged in the longitudinal direction, the first adjustment hole selected from the plurality of first adjustment holes (134), and the selected One second adjustment hole (144) corresponding to the first adjustment hole is matched, and the second bar length adjustment pin (154) is inserted into both of the matched holes to thereby increase the length of the second bar. Can be adjusted,
The fastener is in a state where the first and second elongated holes (113, 123) of the first bar and the first and second elongated holes (133, 143) of the second bar are partially polymerized. A central axis (151) capable of penetrating through the four long holes, and a fastening tool (151a) capable of engaging with the central axis and tightening the first bar and the second bar,
While the crossing angle between the first bar and the second bar can be fixed by tightening with the tightening tool, the central axis (151) is set to the lengths of the first and second bars by releasing the tightening with the tightening tool. A crossbar member characterized by being capable of relative sliding in a hole and adjusting the length of each bar and the crossing angle of both bars. In the first and second bars (101, 102),
The first rods (110, 130) are connected to the second rods (120, 140) at their distal ends (110b, 130b), and the first elongated holes (113, 133) are connected to the plurality of first adjustments. Located on the tip (110b, 130b) side of the hole (114, 134),
The second rods (120, 140) are connected to the first rods (110, 130) by tip portions (120b, 140b), and the plurality of second adjustment holes (124, 144) are the second elongated holes. 2. The crossbar member according to claim 1, wherein the crossbar member is positioned closer to the tip end part (120 b, 140 b) than (123, 143).   The plurality of first adjustment holes (114, 134) and the plurality of second adjustment holes (124, 144) are arranged at equal intervals, respectively, and the base end side of the first rod (110, 130) ( 110a, 130a) to the nth adjustment hole (114-n, 134-n) and the second rod (120, 140) from the base end (120a, 140a) side to the nth adjustment hole (124-n, The crossbar according to claim 2, wherein a connection position of the first rod (110, 130) and the second rod (120, 140) is adjusted so as to match with 144-n). Element.   The first rod (110, 130) and the second rod (120, 140) are hollow pipes, and the second rod (120, 140) is inserted into the first rod (110, 130). The crossbar member according to any one of claims 1 to 3, wherein the crossbar member is provided.   The first bar (101) includes a pair of rod body portions (111, 121) extending in parallel, and the first bar (101) connects the second bar (102) to the pair of rod body portions (111, 121). 121) The crossbar according to any one of claims 1 to 4, wherein the first bar (101) and the second bar (102) intersect each other so as to be sandwiched between them. Element.   A crossbar member (100) according to any one of claims 1 to 5, comprising adjusting the length and crossing angle of the crossbar member (100), thereby adjusting the seat width (L) and the seat surface height ( H) Folding wheelchair with adjustable.

Images