JP7299679B2 - Cylinder support and wheelchair - Google Patents

Description

The present invention relates to a cylinder support attached to a wheelchair.

Various cylinders such as oxygen cylinders are sometimes attached to wheelchairs. Wheelchair-mounted cylinders may have different outer diameters. When using a cylinder with a large outer diameter (also called a large cylinder), a large cylinder support is attached to the wheelchair. When using cylinders with a small outer diameter (also called small diameter cylinders), a small diameter cylinder support is attached to the wheelchair. In such a wheelchair, it is necessary to replace the cylinder support for supporting the cylinder according to the size of the cylinder.

Japanese Patent Application Laid-Open No. 10-155837 discloses a wheelchair provided with a cylinder rack for supporting an oxygen cylinder. In this cylinder rack, cylinders are fixed by mounting bands. By using the mounting band, the cylinder rack can support cylinders with different outer diameters. With this wheelchair, there is no need to change the cylinder rack according to the size of the cylinder.

JP-A-10-155837

In this cylinder rack, the cylinders are fixed by tightening them with mounting bands. Each time the cylinder is changed, the mounting band must be loosened. After replacing the cylinder, it is necessary to tighten and fix the cylinder with the mounting band. This wheelchair requires time and effort to replace the cylinder.

SUMMARY OF THE INVENTION An object of the present invention is to provide a cylinder support attached to a wheelchair, capable of supporting cylinders of different sizes, and facilitating exchange of cylinders.

A cylinder support according to the present invention comprises a large-diameter support section capable of supporting a large-diameter cylinder and a first small-diameter support section capable of supporting a small-diameter cylinder. This cylinder support is attached to the wheelchair. The large-diameter support section has a frame main body capable of supporting the outer peripheral surface of the large-diameter cylinder. This cylinder support has a supporting posture in which the first small-diameter support portion is positioned inside the frame main body and can support the outer peripheral surface of the small-diameter cylinder, and the outer peripheral surface is supported by the large-diameter support portion. The posture can be changed between a standby posture that does not interfere with the large-diameter cylinder.

Preferably, in the standby posture, the first small-diameter support portion is positioned outside the frame main body.

Preferably, the cylinder support includes a large diameter cylinder support including the large diameter support. The first small-diameter support portion is axially attached to the large-diameter cylinder support. The first small-diameter support portion can be rotated with respect to the large-diameter cylinder support body to change its posture between the standby posture and the support posture.

Preferably, in the standby posture, the first small-diameter support portion is located inside the frame body and below the support posture.

Preferably, in the standby posture, the first small-diameter support portion can support the bottom surface of the large-diameter cylinder.

Preferably, the cylinder support includes a second small-diameter support portion positioned below the first small-diameter support portion and supporting the outer peripheral surface of the small-diameter cylinder. The second small-diameter support part is positioned inside the frame main body and is positioned in the supporting posture capable of supporting the outer peripheral surface of the small-diameter cylinder, and the large-diameter cylinder whose outer peripheral surface is supported by the large-diameter support part. The posture can be changed between the standby posture that does not interfere and the posture.

A wheelchair according to the present invention is equipped with any one of the cylinder supports described above.

The cylinder support according to the present invention can support both large and small diameter cylinders. The first small-diameter support part is positioned inside the large-diameter support part, and can change its posture between a support posture that can support the small-diameter cylinder and a standby posture that does not interfere with the large-diameter cylinder supported by the large-diameter support part. It is As a result, there is no need to replace the cylinder support to correspond to the large-diameter cylinder and the small-diameter cylinder. This cylinder support facilitates replacement of the small-diameter cylinder when the first small-diameter support portion is in the supporting posture. When the first small-diameter support portion is in the standby posture, replacement of the large-diameter cylinder is facilitated.

FIG. 1 is a perspective view of a wheelchair fitted with a cylinder support according to one embodiment of the invention. 2 is an exploded perspective view of the cylinder support and wheelchair of FIG. 1. FIG. 3 is an exploded perspective view of the cylinder support of FIG. 1; FIG. FIG. 4(a) is an explanatory view showing the state of use of the cylinder support of FIG. 3, and FIG. 4(b) is an explanatory view showing another state of use of the cylinder support of FIG. FIG. 5(a) is an explanatory view showing the state of use of the cylinder support according to another embodiment of the present invention, and FIG. 5(b) is another embodiment of the cylinder support according to the present invention. is an explanatory diagram showing the state of use of the .

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail based on preferred embodiments with appropriate reference to the drawings.

FIG. 1 shows a wheelchair 2 and a cylinder support 4 attached to the wheelchair 2 . The wheelchair 2 includes a body frame 6, a pair of left and right front wheels 8, and a pair of left and right rear wheels 10. As shown in FIG. The arrow X in FIG. 1 points forward in the front-rear direction of the wheelchair 2, the arrow Y points rightward in the left-right direction, and the arrow Z points upward in the vertical direction.

As shown in FIG. 2, the body frame 6 forms the framework of the wheelchair 2. As shown in FIG. The body frame 6 is made of, for example, a metal pipe. The body frame 6 has a pair of left and right side frames 12 and a cross frame 14 .

Each side frame 12 has a front pipe 12a, a base pipe 12b, a seat side pipe 12c, a rear wheel mounting portion 12d and a back pipe 12e. The front pipe 12a is positioned forward and extends vertically. The base pipe 12b is located below and extends in the front-rear direction. The base pipe 12b connects the front pipe 12a and the rear wheel mounting portion 12d. The seat side pipe 12c is positioned above the base pipe 12b and extends in the front-rear direction. The seat side pipe 12c connects the front pipe 12a and the rear wheel mounting portion 12d. The rear wheel mounting portion 12d is positioned rearward and extends in the vertical direction. The rear wheel mounting portion 12d has a plurality of rear wheel mounting holes 12f. The back pipe 12e is positioned rearward and extends upward from the upper end of the rear wheel mounting portion 12d.

The cross frame 14 includes a pair of front and rear cross members 14a and a pair of left and right seat pipes (not shown). Each seat pipe extends in the front-rear direction along the seat side pipe 12c. Each cross member pair 14a has a cross member 14b and a cross member 14c centrally pivoted to each other.

The upper end of the cross member 14b is fixed to one of the left and right seat pipes. A lower end portion of the cross member 14b is pivotally attached to a mounting portion fixed to the other left and right base pipes 12b. The upper end of the cross member 14c is fixed to the other of the left and right seat pipes. A lower end portion of the cross member 14c is pivotally attached to a mounting portion fixed to one of the left and right base pipes 12b. One of the left and right seat pipes is detachably engaged with a seat pipe receiving portion of one of the left and right seat side pipes 12c. The other left and right seat pipes are detachably engaged with the seat pipe receiving portions of the other left and right seat side pipes 12c. In this manner, the cross frame 14 connects the pair of left and right side frames 12 .

The rear wheel mounting portion 12d extends vertically. A rear portion of the base pipe 12b and a rear portion of the seat side pipe 12c are fixed to the rear wheel mounting portion 12d. A plurality of rear wheel mounting holes 12f are formed in the rear wheel mounting portion 12d. The rear wheel mounting hole 12f penetrates the rear wheel mounting portion 12d in the left-right direction. These rear wheel mounting holes 12f are arranged vertically. These rear wheel mounting holes 12f are arranged at predetermined intervals.

A pair of left and right front wheels 8 are attached to the lower front portion of the body frame 6 . One of the left and right front wheels 8 is attached to one of the left and right side frames 12 . The other left and right front wheels 8 are attached to the other left and right side frames 12 . The front wheel 8 is rotatably mounted.

A pair of left and right rear wheels 10 are attached to the rear of the body frame 6 . One of the left and right rear wheels 10 is attached to one of the left and right rear wheel attachment portions 12d. The other left and right rear wheels 10 are attached to the other left and right rear wheel attachment portions 12d. The rear wheel 10 is attached to one of the plurality of rear wheel attachment holes 12f of the rear wheel attachment portion 12d. The rear wheel 10 is mounted rotatably about an axis extending in the left-right direction. The height of the wheelchair 2 can be adjusted by changing the rear wheel mounting holes 12f to which the rear wheels 10 are mounted. The height of the wheelchair 2 is adjustable.

The wheelchair 2 has a seat 16 and a back seat (not shown). The seat 16 spans over the left and right seat pipes. The seat 16 supports the buttocks of the user sitting on the wheelchair 2 . Although not shown, the back seat is spanned over the left and right back pipes 12e.

Although not shown, the seat pipes of the cross frame 14 are removed from the seat pipe receiving portions of the seat side pipes 12c so that the cross members 14b and 14c can rotate relative to each other. This rotation narrows the distance between the pair of left and right side frames 12 in the left-right direction. The wheelchair 2 can change its posture between the use posture shown in FIG. 2 and the folding posture (not shown). In the folded posture, the space between the pair of left and right side frames 12 in the left-right direction is narrowed. This wheelchair 2 is a so-called folding wheelchair.

As shown in FIG. 3, the cylinder support 4 includes a large diameter cylinder support 18, a small diameter cylinder support 20, a standby fixing screw 26, a support fixing screw 28, a fixing screw 30 and a mounting portion 32. As shown in FIG.

The large-diameter cylinder support 18 includes a first shaft attachment portion 22, a second shaft attachment portion 24, a large-diameter support portion 34, a bottom frame 36, a bottom plate 38, a side frame 40, a side frame 42, a side frame 44 and a side frame 46. It has In the large-diameter cylinder support 18, each of the large-diameter support portion 34, bottom frame 36, bottom plate 38, side frame 40, side frame 42, side frame 44, and side frame 46 is made of, for example, a strip-shaped metal plate.

The large-diameter support portion 34 includes a frame main body 34a, a pair of frame connecting portions 34b, and a pair of side frame connecting portions 34c. The frame main body 34a extends in an arc shape. The frame main body 34a extends in the circumferential direction over a central angle of 180°. Each frame connecting portion 34b extends from the circumferential end of the frame main body 34a and continues to the side frame connecting portion 34c. The frame connecting portions 34b extend in parallel with each other at intervals. The side frame connection portion 34c extends from the frame portion connection portion 34b, and the tip thereof is fixed to the side frame 40 (upper end portion 40a). The large-diameter support portion 34 includes a circular region surrounded by the frame body 34a, a rectangular region having a pair of frame connecting portions 34b as opposite sides and a pair of side frame connecting portions 34c as one opposite side, forms a region of which a portion is superimposed.

The bottom frame 36 is positioned below the large-diameter support portion 34 . The bottom frame 36 forms a circular edge. The circular outer diameter of the bottom frame 36 is the same as the outer diameter of the arc of the frame body 34a. The circular axis of the bottom frame 36 and the axis of the arc of the frame body 34a are located on the same straight line.

A bottom plate 38 extends across the circular area formed by the bottom frame 36 . The bottom plate 38 passes through the center of the circle formed by the bottom frame 36 and has both ends fixed to the bottom frame 36 .

The side frame 40 extends vertically. A pair of side frame connecting portions 34 c are fixed to the upper end portion 40 a of the side frame 40 . A bottom frame 36 is fixed to the lower end portion 40 b of the side frame 40 . A bottom plate 38 may be fixed to the lower end portion 40 b together with or instead of the bottom frame 36 .

The side frame 42 is arranged to face the side frame 40 with the center of the bottom frame 36 therebetween. The side frame 42 extends vertically. A frame main body 34 a is fixed to the upper end portion 42 a of the side frame 42 . A bottom frame 36 is fixed to the lower end portion 42 b of the side frame 42 . A bottom plate 38 may be fixed to the lower end portion 42 b together with or instead of the bottom frame 36 .

The side frame 44 is positioned between the side frame 40 and the side frame 42 in the circumferential direction of the bottom frame 36 . The side frame 44 extends vertically. A frame main body 34 a is fixed to the upper end portion 44 a of the side frame 44 . A bottom frame 36 is fixed to the lower end portion 44 b of the side frame 44 . A bottom plate 38 may be fixed to the lower end portion 44 b together with the bottom frame 36 or instead of the bottom frame 36 . The side frame 46 is positioned between the side frame 40 and the side frame 42 in the circumferential direction of the bottom frame 36 . The side frame 46 is arranged to face the side frame 44 with the center of the bottom frame 36 therebetween. The frame main body 34 a and the bottom frame 36 are fixed to the side frame 46 in the same manner as the side frame 44 .

The small-diameter cylinder support 20 includes a first small-diameter support portion 48 , a second small-diameter support portion 50 , a side frame 52 , a side frame 54 and a side frame 56 . In the small-diameter cylinder support 20, each of the first small-diameter support portion 48, the second small-diameter support portion 50, the side frame 52, the side frame 54, and the side frame 56 is made of, for example, a strip-shaped metal plate.

The first small-diameter support portion 48 includes a frame main body 48a, a mounting shaft attachment portion 48b, and a connecting shaft attachment portion 48c. The frame main body 48a extends in an arc shape to form a substantially circular edge. The outer diameter of the frame main body 48 a is smaller than the outer diameter of the frame main body 34 a of the large-diameter support portion 34 . A circumferential end of the frame main body 48a is continuous with the attachment shaft attachment portion 48b. The mounting shaft mounting portion 48b protrudes radially outward from the frame main body 48a. The connecting shaft attachment portion 48c and the mounting shaft attachment portion 48b are positioned facing each other with the center of the frame main body 48a therebetween. The connecting shaft mounting portion 48c protrudes radially outward from the frame main body 48a.

The second small-diameter support portion 50 is positioned below the first small-diameter support portion 48 . The second small-diameter support portion 50 includes a frame main body 50a, an attachment shaft attachment portion 50b, and a connecting shaft attachment portion 50c. The frame body 50a is formed similarly to the frame body 48a. The mounting shaft attachment portion 50b is formed in the same manner as the mounting shaft attachment portion 48b. The connecting shaft mounting portion 50c is formed in the same manner as the connecting shaft mounting portion 48c.

The side frame 52 extends vertically. The upper end portion 52 a of the side frame 52 is pivotally attached to the connecting shaft attachment portion 48 c of the first small-diameter support portion 48 . A lower end portion 52b of the side frame 52 is pivotally attached to the connecting shaft attachment portion 50c of the second small-diameter support portion 50 . The rotational axis of the pivoted upper end portion 52a and the rotational axis of the lower end portion 52b are parallel. The side frame 52 has a concave portion 52c recessed toward the side frame 40 between an upper end portion 52a and a lower end portion 52b. The recess 52c is recessed toward the inside of the large-diameter cylinder support 18. As shown in FIG. A support fixing screw 28 is formed between the upper end portion 52a of the side frame 52 and the recess 52c. The support fixing screw 28 is a female screw that engages with the fixing screw 30 .

The side frame 54 extends vertically. The upper end portion 54 a of the side frame 54 is pivoted to the first small-diameter support portion 48 . The upper end portion 54a of the side frame 54 is pivoted between the attachment shaft attachment portion 48b and the connecting shaft attachment portion 48c in the circumferential direction of the frame main body 48a. A lower end portion 54b of the side frame 54 is pivotally attached to the second small-diameter support portion 50 . The lower end portion 54b of the side frame 54 is axially attached between the attachment axially-attached portion 50b and the connecting axially-attached portion 50c in the circumferential direction of the frame portion main body 50a. The rotation axis of the upper end portion 54 a of the side frame 54 and the rotation axis of the lower end portion 54 b are parallel to the rotation axis of the upper end portion 52 a of the side frame 52 .

The side frame 56 is positioned between the mounting shaft mounting portion 48b and the mounting shaft mounting portion 50b and the connecting shaft mounting portion 48c and the connecting shaft mounting portion 50c in the circumferential direction of the frame main body 48a and the frame main body 50a. .
The side frame 56 is positioned to face the side frame 54 with the centers of the frame body 48a and the frame body 50a interposed therebetween. As with the side frame 54 , the side frame 56 has an upper end portion 56 a pivotally attached to the first small diameter support portion 48 and a lower end portion 56 b pivotally attached to the second small diameter support portion 50 .

The attachment portion 32 includes an attachment base portion 32a and a support portion 32b. The mounting base 32 a has mounting holes 32 c for mounting to the body frame 6 . The mounting portion 32 is detachably fixed to the rear wheel mounting portion 12d by passing a screw through the mounting hole 32c. The support portion 32b has a slot 32d extending in the vertical direction. A screw is passed through the slot 32d to detachably fix the side frame 46 of the cylinder support 4 to the support portion 32b. As a result, the cylinder support 4 is detachably fixed to the body frame 6 and the position thereof can be adjusted in the vertical direction. Instead of the side frame 46, the side frame 44 may be detachably fixed to the support portion 32b.

The first shaft mounting portion 22 is positioned at the upper end portion 40 a of the side frame 40 . The first shaft mounting portion 22 protrudes toward the inside of the large-diameter cylinder support 18 . The first shaft mounting portion 22 protrudes from the side frame 40 toward the opposing side frame 42 . The attachment shaft attachment portion 48 b of the first small-diameter support portion 48 is pivotally attached to the first shaft attachment portion 22 . The second shaft attachment portion 24 is located between the upper end portion 40a and the lower end portion 40b of the side frame 40. As shown in FIG. The second shaft attachment portion 24 is positioned below the first shaft attachment portion 22 . The second shaft mounting portion 24 protrudes toward the inside of the large-diameter cylinder support 18 . The second shaft attachment portion 24 protrudes from the side frame 40 toward the opposing side frame 42 . The attachment shaft attachment portion 50 b of the second small-diameter support portion 50 is pivotally attached to the second shaft attachment portion 24 .

The standby fixing screw 26 is positioned between the upper end 40a and the lower end 40b of the side frame 40. As shown in FIG. The standby fixing screw 26 is positioned below the second shaft mounting portion 24 . The standby fixing screw 26 is a female screw that screws together with the fixing screw 30 .

The fixing screw 30 has a male screw main body 30a and a knob 30b. The male thread main body 30a is formed so as to be screwed with each of the standby fixing screw 26 and the support fixing screw 28. As shown in FIG. By gripping and rotating this knob 30b, it can be screwed with each of the standby fixing screw 26 and the support fixing screw 28. As shown in FIG.

FIG. 4(a) shows the cylinder support 4 with the small-diameter cylinder support 20 in the standby posture. In this standby posture, both the first small-diameter support portion 48 and the second small-diameter support portion 50 are in the standby posture. In the cylinder support member 4, the first small diameter support portion 48 and the second small diameter support portion 50 rotate downward (to face the lower end portion 40b of the side frame 40). The first small-diameter support portion 48 extends downward along the side frame 40 from the first shaft attachment portion 22 . The frame main body 48a is positioned below the attachment shaft attachment part 48b, and the connecting shaft attachment part 48c is positioned below the frame main body 48a. The second small-diameter support portion 50 extends downward along the side frame 40 from the second shaft attachment portion 24 . The frame main body 50a is positioned below the attachment shaft attachment part 50b, and the connecting shaft attachment part 50c is positioned below the frame main body 50a.

In this standby posture, the first small-diameter support portion 48, the second small-diameter support portion 50, the side frame 52, the side frame 54, and the side frame 56 are positioned outside the area surrounded by the frame main body 34a when viewed in the vertical direction. are doing. In this standby posture, the first small diameter support portion 48, the second small diameter support portion 50, the side frame 52, the side frame 54, and the side frame 56 are outside the area surrounded by the bottom frame 36 when viewed in the vertical direction. positioned. In other words, the first small diameter support portion 48 , the second small diameter support portion 50 , the side frame 52 , the side frame 54 and the side frame 56 are positioned outside the bottom frame 36 in the radial direction of the bottom frame 36 . Side frame 52 , side frame 54 and side frame 56 extend along side frame 40 . Each of the side frame 52 , the side frame 54 and the side frame 56 connects the first small diameter support portion 48 and the second small diameter support portion 50 . The side frame 52 is screwed to the side frame 40 by the fixing screws 30 . In this fixing screw 30 , the knob 30 b is positioned in the recess 52 c of the side frame 52 .

FIG. 4(b) shows the cylinder support 4 with the small-diameter cylinder support 20 in the supporting posture. In this support posture, both the first small-diameter support portion 48 and the second small-diameter support portion 50 are in the support posture. The first small-diameter support portion 48 and the second small-diameter support portion 50 rotate toward the side frame 42 . The first small-diameter support portion 48 and the second small-diameter support portion 50 enter inside the area surrounded by the frame main body 34a and the area surrounded by the bottom frame 36 when viewed in the vertical direction. In other words, the first small-diameter support portion 48 and the second small-diameter support portion 50 are located inside the frame main body 34a. In the present invention, the position of the first small-diameter support portion 48 inside the frame main body 34a means that the first small-diameter support portion 48 is positioned within a range where it interferes with the large-diameter cylinder supported by the large-diameter support portion 34. means. Positioning the second small-diameter support portion 50 inside the frame main body 34 a means the same as the first small-diameter support portion 48 . In the first small-diameter support portion 48, the mounting shaft mounting portion 48b is positioned on the side frame 40 side, and the connecting shaft mounting portion 48c is positioned on the side frame 42 side. In the second small-diameter support portion 50, the mounting shaft mounting portion 50b is positioned on the side frame 40 side, and the connecting shaft mounting portion 50c is positioned on the side frame 42 side. In this supporting position, the axis of the frame main body 48a and the axis of the frame main body 50a are on the same straight line.

In this supporting posture, the side frame 52 is screwed to the side frame 42 by the fixing screws 30 . The first small-diameter support portion 48 is rotatably connected to the first shaft attachment portion 22 and fixed to the side frame 42 via the side frame 52 . The second small-diameter support portion 50 is rotatably connected to the second shaft attachment portion 24 and fixed to the side frame 42 via the side frame 52 . As a result, the small-diameter cylinder support 20 is fixed in a supporting posture.

4B, the first small-diameter support portion 48 and the second small-diameter support portion 50 are located inside the frame portion main body 34a of the large-diameter support portion 34 in the radial direction of the frame portion main body 34a. Then, it is in a supporting posture for supporting the outer peripheral surface of the small-diameter cylinder. In FIG. 4A, the first small-diameter support portion 48 and the second small-diameter support portion 50 are in a standby posture so as not to interfere with the large-diameter cylinder whose outer peripheral surface is supported by the large-diameter support portion 34 . This small-diameter cylinder supporter 20 can change its posture between this support posture and a standby posture. This allows the cylinder support 4 to support large and small cylinders without replacement. In the present invention, the first small-diameter support portion 48 and the second small-diameter support portion 50 are located inside the frame portion main body 34a in the radial direction of the frame portion main body 34a. A state in which a part of the support portion 50 protrudes outside the frame portion main body 34a is also included.

In the standby posture of the small-diameter cylinder supporter 20, the first small-diameter support portion 48 and the second small-diameter support portion 50 are positioned so that the frame portion main body 34a and the bottom frame 36 of the large-diameter support portion 34 are aligned in the radial direction of the frame portion main body 34a and the bottom frame 36. Located outside of 36. As a result, when the large-diameter support portion 34 supports the outer peripheral surface of the large-diameter cylinder, the bottom frame 36 supports the outer peripheral surface of the bottom portion of the large-diameter cylinder, and the bottom plate 38 supports the bottom surface of the large-diameter cylinder, the large-diameter Interference between the diameter cylinder and the small diameter cylinder support 20 can be prevented.

Furthermore, the large-diameter support portion 34 has a circular area surrounded by the frame main body 34a, and a rectangular area having a pair of frame connecting portions 34b as opposite sides and a pair of side frame connecting portions 34c as one opposite side. , forms a region of which a portion is superimposed. When viewed in the vertical direction, the small-diameter cylinder support 20 in the standby posture is accommodated outside the circular area surrounded by the frame main body 34a. Since the side frame 52 is screwed to the side frame 40 with the fixing screws 30, interference between the large-diameter cylinder and the small-diameter cylinder support 20 can be prevented more reliably.

In this cylinder support member 4 , the first small diameter support portion 48 and the second small diameter support portion 50 are axially attached to the large diameter cylinder support member 18 . The first small-diameter support portion 48 and the second small-diameter support portion 50 can rotate with respect to the large-diameter cylinder support member 18 and change their attitudes between a standby attitude and a supporting attitude. In this cylinder support member 4, the first small diameter support portion 48 and the second small diameter support portion 50 can be easily changed between a standby posture and a support posture.

The cylinder support 4 includes a second small-diameter support 50 located below the first small-diameter support 48 and supporting the outer peripheral surface of the small-diameter cylinder. In this cylinder support 4, the first small-diameter support portion 48 and the second small-diameter support portion 50 support the outer peripheral surface of the small-diameter cylinder. As a result, the cylinder support 4 can more stably hold the small-diameter cylinder.

The cylinder support 4 may be provided with only the first small-diameter support portion 48 without the second small-diameter support portion 50 . Further, the cylinder support 4 rotates with respect to the large diameter cylinder support 18 between the first small diameter support portion 48 and the second small diameter support portion 50, or below the second small diameter support portion 50. A third small-diameter support may be provided.

The cylinder support 4 supports two types of cylinders, namely, large-diameter cylinders that can be supported by the large-diameter cylinder support 18 and small-diameter cylinders that can be supported by the small-diameter cylinder support 20, but is not limited to this. The cylinder supporter 4 includes a middle-diameter cylinder supporter having an outer diameter between the large-diameter cylinder supporter 18 and the small-diameter cylinder supporter 20, and a small-diameter cylinder supporter having an outer diameter smaller than that of the small-diameter cylinder supporter 20. may be provided.

4B, the upper end of the first small-diameter support portion 48 is located above the upper end of the frame main body 34a of the large-diameter support portion 34 in the vertical direction. As a result, the small-diameter cylinder is guided by the first small-diameter support portion 48 so that it can be easily inserted into the cylinder support member 4 . This prevents the large-diameter support portion 34 and the first small-diameter support portion 48 from being deformed due to collision with the small-diameter cylinder when the small-diameter cylinder is inserted.

In this cylinder support 4, the first small-diameter support portion 48 in the supporting posture is located inside the frame portion main body 34a of the large-diameter support portion 34 in the radial direction of the frame portion main body 34a when viewed in the vertical direction. This prevents the large-diameter cylinder from being erroneously attached in the supporting posture of the first small-diameter support portion 48 . The cylinder support 4 makes it easy to distinguish between a state in which a large-diameter cylinder is attached and a state in which a small-diameter cylinder is attached.

Further, since the first small-diameter support portion 48 is positioned inside the large-diameter support portion 34 when viewed in the vertical direction, the cylinder support body 4 is space-saving. As a result, obstruction to folding of the folding wheelchair 2 is suppressed. This cylinder support 4 is suitable for a folding wheelchair 2 .

5(a) and 5(b) show a cylinder support 64 according to another embodiment of the invention. The cylinder support 64 includes a large-diameter cylinder support 66 , a small-diameter cylinder support 68 , a mounting portion 70 and a locking portion 72 .

The large-diameter cylinder support 66 includes a large-diameter support portion 74 , a bottom plate 76 , a side frame 78 , a side frame 80 , a side frame 82 and a side frame 84 . In this large-diameter cylinder support 66, each of the large-diameter support portion 74, the bottom plate 76, the side frame 78, the side frame 80, the side frame 82, and the side frame 84 is made of, for example, a strip-shaped metal plate.

The large-diameter support portion 74 has a ring shape. A circular region surrounded by the large-diameter support portion 74 is formed. The large-diameter support portion 74 also serves as a frame main body 74a that supports the outer peripheral surface of the large-diameter cylinder.

The bottom plate 76 includes a bottom plate piece 76a, a bottom plate piece 76b and a bottom plate piece 76c. The bottom plate piece 76a has a ring-shaped plate shape. The bottom plate piece 76b and the bottom plate piece 76c extend in the radial direction of the bottom plate piece 76a and intersect each other.

The side frame 78 extends vertically. A large-diameter support portion 74 is fixed to an upper end portion 78 a (not shown) of the side frame 78 . A bottom plate piece 76 a is fixed to a lower end portion 78 b (not shown) of the side frame 78 . The side frame 80 extends vertically. A large-diameter support portion 74 is fixed to the upper end portion 80 a of the side frame 80 . A bottom plate piece 76 a is fixed to the lower end portion 80 b of the side frame 80 . The side frame 78 and the side frame 80 are arranged facing each other with the center of the large-diameter support portion 74 therebetween. The side frame 80 has a slot 80c. The slot 80c extends vertically. Side frame 78 includes a slot 78c formed similarly to slot 80c of side frame 80. As shown in FIG.

The side frame 82 is positioned between the side frame 78 and the side frame 80 in the circumferential direction of the large-diameter support portion 74 . The side frame 82 extends vertically. A large-diameter support portion 74 is fixed to the upper end portion 82 a of the side frame 82 . A bottom plate piece 76 a is fixed to the lower end portion 82 b of the side frame 82 . The side frame 82 has a slot 82c. The slot 82c extends vertically. The side frame 84 is positioned between the side frame 78 and the side frame 80 in the circumferential direction of the large-diameter support portion 74 . The side frame 84 is arranged to face the side frame 82 with the center of the large-diameter support portion 74 therebetween. As with the side frame 82, the side frame 84 is fixed to the large-diameter support portion 74 and the bottom plate piece 76a. The side frame 84 has a slot 84c, not shown, formed similarly to the slot 82c of the side frame 82. As shown in FIG.

The small diameter cylinder support 68 includes a first small diameter support portion 86 , a bottom frame 88 and a pair of fixing screws 90 . The first small-diameter support portion 86 has a ring shape. The first small-diameter support portion 86 is made of resin, for example. A pair of screw holes is formed in the outer peripheral surface 86a of the first small-diameter support portion 86 . The pair of screw holes are formed 180° apart in the circumferential direction. The first small-diameter support portion 86 has a pair of engaging grooves 92 recessed radially inward from the outer peripheral surface 86a. Each engagement groove 92 is located between the pair of screw holes in the circumferential direction.

The bottom frame 88 has a ring shape. The bottom frame 88 is made of, for example, a strip-shaped metal plate. The bottom frame 88 is fixed to the bottom plate piece 76a. It rises upward from the bottom plate piece 76a. The outer diameter of the bottom frame 88 is sized so that it can be inserted into the central through-hole of the first small-diameter support portion 86 .

Each fixing screw 90 is screwed into a threaded hole of the first small-diameter support portion 86 . One fixing screw 90 is passed through the slot 80 c of the side frame 80 . The side frame 80 is sandwiched between the head of the fixing screw 90 and the outer peripheral surface 86 a of the first small-diameter support portion 86 . The other fixing screw 90 is passed through the slot 78c of the side frame 78. As shown in FIG. A side frame 78 is sandwiched between the head of the fixing screw 90 and the outer peripheral surface 86 a of the first small-diameter support portion 86 . The side frame 82 is locked in one engaging groove 92 . The side frame 84 is engaged with the other engagement groove 92 . Thereby, the first small-diameter support portion 86 is vertically movable along the side frame 78 , the side frame 80 , the side frame 82 , and the side frame 84 .

Although not shown, the cylinder support 64 is detachably attached to the body frame 6 of the wheelchair 2 by means of attachment portions 70 and locking portions 72 . For example, the attachment portion 70 is attached to the rear wheel attachment portion 12 d of the side frame 12 . The locking portion 72 is locked to the base pipe 12b extending further rearward from the rear wheel mounting portion 12d.

In FIG. 5A, the first small-diameter support portion 86 is positioned and fixed by a pair of fixing screws 90 above the bottom frame 88 away from it. In FIG. 5A, the axis of the bottom frame 88 and the axis of the first small-diameter support portion 86 are on the same straight line. In FIG. 5(a), when the small-diameter cylinder is inserted, the inner peripheral surface 86b of the first small-diameter support portion 86 supports the outer peripheral surface of the small-diameter cylinder, and the inner peripheral surface 88a of the bottom frame 88 supports the bottom of the small-diameter cylinder. The bottom plate piece 76b and the bottom plate piece 76c support the bottom surface of the small-diameter cylinder. In FIG. 5(a), the small diameter cylinder support 68 is in a supporting position.

In FIG. 5B, the first small-diameter support portion 86 is located below the position of the support posture. The first small-diameter support portion 86 is positioned and fixed by a pair of fixing screws 90 . The first small-diameter support portion 86 is in contact with the bottom plate 76 . A bottom frame 88 is inserted into the central through hole of the first small-diameter support portion 86 . In FIG. 5B, when a large-diameter cylinder is inserted, the inner peripheral surface 74b of the large-diameter support portion 74 supports the outer peripheral surface of the large-diameter cylinder, and the first small-diameter support portion 86 supports the bottom surface of the large-diameter cylinder. support. In FIG. 5(b), the small diameter cylinder support 68 is in the standby position. In this standby posture, the bottom frame 88 may support the bottom surface of the large-diameter cylinder. Also, the bottom plate 76 may protrude radially inward and upward to support the bottom surface of the large-diameter cylinder.

In this cylinder support 64, in FIG. 5(a), the first small-diameter support portion 86 is positioned upward and is in a supporting posture for supporting the outer peripheral surface of the small-diameter cylinder. In FIG. 5B, the first small-diameter support portion 86 is in a standby posture in which it abuts against the bottom plate 76 and does not interfere with the large-diameter cylinder whose outer peripheral surface is supported by the large-diameter support portion 74 . This small-diameter cylinder supporter 68 can change its posture between this support posture and a standby posture. This allows the cylinder support 64 to support large and small cylinders without replacement.

In this cylinder support 64 , the first small-diameter support 86 is located inside the large-diameter support 74 in the radial direction of the large-diameter support 74 in this standby posture. This first small-diameter support portion 86 is located below the position in the support posture. This prevents the first small-diameter support portion 86 from interfering with the large-diameter cylinder in the standby posture.

Furthermore, in the cylinder supporter 64, the first small-diameter support portion 86 supports the bottom surface of the large-diameter cylinder in the standby posture. In this cylinder support 64, the bottom surface of the large-diameter cylinder can be supported by the first small-diameter support portion 86 made of resin. The impact applied to large-diameter cylinders can be mitigated. The first small-diameter support portion 86, which is most easily damaged, is replaceable.

The cylinder support 64 may include a second small diameter support, not shown. In this case, the second small diameter support portion is positioned below the first small diameter support portion 86 . The second small diameter support portion is configured similarly to the first small diameter support portion 86 . The second small-diameter support portion is vertically movable and positionable between the first small-diameter support portion 86 and the bottom plate 76 .

The cylinder support described above can be widely applied to wheelchairs to which cylinders are attached.

Reference Signs List 2 wheelchair 4, 64 cylinder support 6 body frame 12 side frame 18, 66 large-diameter cylinder support 20, 68 small-diameter cylinder support 30, 90 Fixing screws 34, 74 Large-diameter support portions 34a, 74a Frame body 48, 86 First small-diameter support portion 50 Second small-diameter support portion

Claims (7)

A cylinder support attached to a wheelchair, comprising a large-diameter support part capable of supporting a large-diameter cylinder and a first small-diameter support part capable of supporting a small-diameter cylinder,
The large-diameter support portion includes a frame main body capable of supporting the outer peripheral surface of the large-diameter cylinder,
The first small-diameter support portion interferes with a supporting posture in which the outer peripheral surface of the small-diameter cylinder can be supported by being positioned inside the frame main body, and the large-diameter cylinder whose outer peripheral surface is supported by the large-diameter support portion. It is possible to change the posture to a non-waiting posture and a posture change,
In the standby posture, the first small-diameter support portion is positioned inside the large-diameter support portion and outside the frame portion main body when viewed in the vertical direction ,
A second small-diameter support portion positioned below the first small-diameter support portion and supporting an outer peripheral surface of the small-diameter cylinder,
The second small-diameter support part is positioned inside the frame main body and is capable of supporting the outer peripheral surface of the small-diameter cylinder, and the large-diameter cylinder whose outer peripheral surface is supported by the large-diameter support part. A cylinder support that is capable of changing its attitude to the non-interfering standby attitude . the large-diameter support portion includes a pair of frame connecting portions and a side frame connecting portion extending outward from the frame body,
The large-diameter support portion forms a first region surrounded by the frame body and a second region surrounded by the pair of frame connecting portions and side frame connecting portions,
2. The cylinder support body according to claim 1, wherein said first small-diameter support portion is located in said second region in said standby posture. A large-diameter cylinder support including the large-diameter support is provided,
The first small-diameter support portion is axially attached to the large-diameter cylinder support,
3. The cylinder supporter according to claim 1, wherein said first small-diameter supporter rotates with respect to said large-diameter cylinder supporter so as to be changeable between said standby posture and said support posture. A cylinder support attached to a wheelchair , comprising a large-diameter cylinder support including a large-diameter support that can support a large-diameter cylinder and a first small-diameter support that can support a small-diameter cylinder,
The large-diameter support portion includes a frame main body capable of supporting the outer peripheral surface of the large-diameter cylinder,
The first small-diameter support portion is located inside the frame main body, surrounds the outer peripheral surface of the small-diameter cylinder, and supports the outer peripheral surface of the small-diameter cylinder in a support posture, and supports the outer peripheral surface on the large-diameter support portion. and a standby posture that does not interfere with the large-diameter cylinder being held , and a posture that can be changed by moving up and down with respect to the large-diameter cylinder support ,
In the standby posture, the first small-diameter support portion is positioned inside the frame body and below the support posture, and the upper end of the first small-diameter support portion is supported by the large-diameter support portion. A cylinder support located below the bottom surface of a large diameter cylinder . 5. The cylinder support according to claim 4, wherein said first small-diameter support portion can support the bottom surface of said large-diameter cylinder in said standby posture. A second small-diameter support portion positioned below the first small-diameter support portion and supporting an outer peripheral surface of the small-diameter cylinder,
The second small-diameter support part is positioned inside the frame main body, and has a supporting posture capable of supporting the outer peripheral surface of the small-diameter cylinder, and the large-diameter cylinder whose outer peripheral surface is supported by the large-diameter support part. 6. A cylinder support according to claim 4 or 5 , which is capable of changing its posture between said stand-by posture which does not interfere and said stand-by posture. A wheelchair to which the cylinder support according to any one of claims 1 to 6 is attached.

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