JP2014166221A - Vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce overall weight while maintaining or increasing durability, rigidity and strength.SOLUTION: A band brake 60 brakes a wheel 34 by tightening an outer periphery of a drum 61, which is fixed to a hub 50 of the wheel 34, with a band 62. An outer peripheral part of the drum 61 is provided with a reinforcing member 63 that is formed of a second material different from a first material for forming the drum 61.

Description

  The present invention relates to a vehicle.

  Vehicles such as wheelchairs are used as a means for moving people who are difficult to walk, such as physically disabled people, elderly people, and injured people, and are moved by, for example, self-running by the user or the hand of an assistant. (For example, refer to Patent Document 1). Such a wheelchair is light in weight so that the wheelchair can be easily operated, for example, when the wheelchair is driven and operated by a user or an assistant, or when the user or an assistant lifts the wheelchair. It is hoped that

  However, it is difficult to reduce the weight because the band brake for braking the rear wheel of the wheelchair is mainly made of iron and is heavy. Further, when the band brake drum fixed to the rear wheel hub is made of a lightweight material, the durability, strength, etc. of the band brake may be reduced.

  Furthermore, if the wheelchair frame member is formed of a light material instead of iron or the like, and the weight of the wheelchair is to be reduced, the rigidity and strength of the frame member may decrease. is there.

  That is, in a vehicle such as a wheelchair, there is a problem that durability, rigidity, strength, and the like are reduced when the weight is reduced.

Japanese Patent No. 2004-242895

  The present invention has been made in view of the above problems, and provides a band brake and a wheelchair capable of reducing the overall weight while maintaining or improving durability, rigidity, and strength. The purpose is to do.

  A vehicle according to the present invention is a vehicle having a band brake for braking a wheel by tightening an outer periphery of a drum fixed to a hub of a wheel with a band, and a drum is formed on an outer periphery of the drum. A reinforcing member made of a second material different from the material is provided.

  Further, the second material may have a property of higher wear resistance than the first material.

  Furthermore, the vehicle according to the present invention includes a back frame member to which a back seat is attached, a lower main frame member that is connected to a lower end portion of the back frame member and extends in the front direction and to which front wheels and rear wheels are attached; An upper main frame member extending in the forward direction from the vicinity of the lower end of the frame member. Between the lower main frame member and the upper main frame member, the lower main frame member and the upper main frame member are spanned. A curved portion is provided.

  Moreover, the arm support member to which the armrest is attached may further be provided, and the lower end portion of the arm support member may be connected to the curved portion.

  The drum further includes a band brake that is attached to the back frame member and is fastened with a band to tighten the outer periphery of the drum fixed to the hub of the rear wheel to brake the rear wheel. A reinforcing member made of a second material different from the above material may be provided.

  In the present invention, a reinforcing member made of a second material different from the first material forming the drum is provided on the outer peripheral portion of the drum fixed to the hub of the vehicle wheel. Therefore, according to the present invention, the drum can be formed of the first material that is lighter than the material of the conventional drum, for example, so that the overall weight can be reduced as compared with the conventional product. For example, the durability, rigidity, and strength can be maintained or improved by forming the second material having characteristics such as wear resistance, rigidity, and strength higher than those of the first material. That is, according to the present invention, it is possible to reduce the overall weight while maintaining or improving durability, rigidity, and strength.

  In the present invention, a curved portion is provided between the lower main frame member and the upper main frame member so as to extend over the lower main frame member and the upper main frame member. Therefore, the present invention can absorb the impact applied to the lower main frame member and the upper main frame member by the curved portion. Therefore, the present invention can maintain or improve durability, rigidity, and strength while reducing the overall weight by forming each frame member with a material that is lighter than conventional frame members. That is, according to the present invention, it is possible to reduce the overall weight while maintaining or improving durability, rigidity, and strength.

It is the perspective view which showed the wheelchair to which this invention is applied. It is the side view which showed the wheelchair to which this invention is applied. It is the perspective view which showed the main body frame, the cross frame, and the seat frame. It is the side view which showed the main body frame, the cross frame, and the seat frame. It is the perspective view which showed the hub of the rear wheel. It is the front view which showed the band brake to which this invention is applied. It is the longitudinal cross-sectional view which showed the armrest. It is the front view which showed the design of the back seat and the seat.

Hereinafter, a vehicle to which the present invention is applied will be described in detail with reference to the drawings. Here, a wheelchair equipped with a band brake will be described as an example. In addition, this invention is not limited to the following examples, In the range which does not deviate from the summary of this invention, it can change arbitrarily. Further, description will be given in the following order.
1. 1. Description of wheelchair configuration 1-1. Main body frame 1-1-1. Back frame section 1-1-2. Main frame part 1-1-3. Side frame part 1-2. Cross frame 1-3. Seat frame 1-4. Sheet 1-4-1. Back sheet 1-4-2. Seat seat 2. Modified example

<1. Explanation of wheelchair configuration>
As shown in FIGS. 1 and 2, a wheelchair 1 to which the present invention is applied has a pair of left and right body frames 10, 10 and a pair of body frames 10, 10 that are opposed to each other in the width direction. A cross frame 11 that is folded in a direction and a seat frame 12 that is provided at an upper end portion of the cross frame 11 and to which the seat 3 is attached are provided. Hereinafter, the back seat 2 and the seat 3 are also simply referred to as a seat 4.

<1-1. Body frame>
As shown in FIG. 3, the main body frame 10 is formed of a frame member made of a pipe having a circular cross section, a polygonal shape or the like made of aluminum. Specifically, the main body frame 10 is provided on a back frame portion 20 formed in a substantially L shape in a side view and a lower end portion side of the back frame portion 20, and a rear wheel 34 is attached to the rear and a front wheel 35 is attached to the front. The main frame unit 30 includes a side frame unit 40 that is provided across the back frame unit 20 and the main frame unit 30 and to which the armrest 41 is attached.

<1-1-1. Back frame>
As shown in FIG. 3, the back frame portion 20 includes a lower frame member 21 and an upper frame member 23 supported so as to be pivotable rearward with respect to the lower frame member 21 via a back folding bracket 22. ing. The back frame portion 20 is locked so that it cannot be folded with respect to the lower frame member 21 by the upper frame member 23 being locked by the locking mechanism of the back folding bracket 22 during use. On the other hand, the back frame portion 20 is provided in a foldable state by releasing the lock state of the lock mechanism of the back folding bracket 22. Therefore, the wheelchair 1 can be reduced in size by folding the upper frame member 23 rearward when the user moves the wheelchair 1 on a car or the like, or during storage before shipment.

  Furthermore, the back folding bracket 22 is disposed at a position where it does not interfere with the user's back when the user sits on the seat 4. For example, the back folded metal fitting 22 is disposed at a height corresponding to the recess of the user's back. Therefore, when the user sits on the seat 4, the wheelchair 1 is difficult to hit the back and the fitting 22 is not hit, so that the ride comfort can be improved.

  Moreover, as shown in FIG. 3, the back frame part 20 is curved and provided so that the whole is substantially L-shaped in a side view. Specifically, the back frame portion 20 is provided so that the upper frame member 23 is bent backward.

  Further, as shown in FIG. 4, a pusher portion 25 to which a grip 24 to be gripped when an assistant operates the wheelchair 1 is provided at the upper end portion of the back frame portion 20 curved backward. The pusher portion 25 is formed by tilting the upper portion of the upper frame member 23 of the back frame portion 20 backward, for example, by 8 degrees from a position lower than the position of the scapula when the user is sitting on the seat 4. It is provided so as to be curved.

  Therefore, when the wheelchair 1 is a self-propelled type in which the wheelchair 1 is driven and operated by a user, the user's elbow and scapula can be prevented from interfering with the back frame portion 20 during driving. easy. Further, when the wheelchair 1 is of the assisting type in which the wheelchair 1 is driven and operated by an assistant, the periphery of the scapula of the user sitting on the seat 4 does not interfere with the back frame portion 20, so that the riding comfort is improved. be able to.

  Note that the presser portion 25 is not limited to tilting the upper portion of the upper frame member 23 backward by 8 degrees, but is such that the periphery of the user's shoulder blade sitting on the seat 4 does not interfere with the back frame portion 20. It is only necessary that the tilt angle can be changed as appropriate. Furthermore, you may make it provide the presser part 25, without making it incline back.

  Furthermore, the pusher portion 25 is provided so as to be inclined downward by a predetermined angle with respect to the ground. Here, the pusher portion 25 is provided so as to be inclined downward by 10 degrees with respect to the ground. Therefore, the pusher portion 25 is easy for an assistant to apply force, and the assistant can easily push the wheelchair 1. In addition, you may provide the presser part 25 so that it may incline in parallel or predetermined angle upwards with respect to the ground.

  Further, as shown in FIG. 1, a rear wheel brake lever 26 is attached to the pusher portion 25 so that an assistant operates a band brake 60 that is a rear wheel brake that brakes the rotation of the rear wheel 34 of the wheelchair 1. ing. The rear wheel brake lever 26 is connected to a band brake 60 provided on the rear wheel 34 of the wheelchair 1 via a brake wire 27. Therefore, in the wheelchair 1, when the assistant grips the rear wheel brake lever 26, the band brake 60 is operated via the brake wire 27 and the rotation of the rear wheel 34 is braked.

  As shown in FIGS. 1 and 2, a rear wheel 34 is rotatably attached to the lower frame member 21 in the vicinity of the lower end portion of the outer surface in the width direction. As shown in FIG. 5, the hub 50 of the rear wheel 34 includes a pair of disk-shaped hub flanges 51a and 51b to which spokes (not shown) are attached, and a cylindrical hub shell that connects the pair of hub flanges 51a and 51b. 52 and a hub shaft 53 that is disposed in the hub shell 52 via a bearing (not shown), is exposed to the outside from one hub flange 51a, and is fixed to the lower frame member 21. The hub flanges 51a and 51b, the hub shell 52, and the hub shaft 53 are all made of aluminum. Furthermore, as shown in FIGS. 1 and 2, the rear wheel 34 is provided with a band brake 60 for braking the rear wheel 34.

  As shown in FIG. 6, the band brake 60 is a brake that tightens the outer periphery of a cylindrical drum 61 fixed to one hub flange 51 a with an arc-shaped brake band (band) 62 and brakes the drum 61. It is made of aluminum. The band brake 60 has a pin 65a whose one end of an arc-shaped band 62 is fixed to a cover member 64 that covers the drum 61 and the band 62 and protects the drum 61 and the band 62 from rain and mud, and the other end is a rotating shaft. Is connected to a lever 65 rotatably supported by the cover member 64. Furthermore, the drum 61 is provided with a reinforcing member 63 over the entire outer periphery of the main body 61a. The reinforcing member 63 is made of a second material having higher wear resistance (hardness), rigidity, and strength than the first material forming the main body portion 61a of the drum 61. For example, the reinforcing member 63 is made of steel (iron). Is formed. In the band brake 60, when the rear wheel brake lever 26 of the pusher portion 25 is operated and the brake wire 27 connected to the lever 65 is pulled, the lever 65 rotates and the band 62 connected to the lever 65 is connected. Tightens the drum 61 via the reinforcing member 63 to brake the rear wheel 34.

  Accordingly, the wheelchair 1 can be made lighter than the conventional wheelchair in which the hub 50 is formed of aluminum by forming the hub 50 of the rear wheel 34 with aluminum. Furthermore, the wheelchair 1 can reduce the weight by forming the main body 61a of the drum 61 of the band brake 60 from aluminum, compared to a conventional wheelchair in which the drum of the band brake is formed from steel. In addition, the wheelchair 1 is formed of the body 61a of the drum 61 of the band brake 60 with aluminum, and has a higher wear resistance (hardness) than the first material forming the body 61a on the outer periphery of the body 61a. By providing the reinforcing member 63 formed of the second material having high rigidity and strength, the wheelchair 1 can be reduced in weight while maintaining or improving durability, rigidity, and strength. Further, the hub shaft 53 may be made of steel in terms of durability, rigidity, and strength.

  Further, as shown in FIG. 1, a ring-shaped hand rim 36 that is slightly smaller than the rear wheel 34 is attached to the rear wheel 34 on the outside. The hand rim 36 is made of aluminum. Therefore, the wheelchair 1 can be lighter than the resin hand rim. Further, the surface of the hand rim 36 is shrunk. Therefore, the wheelchair 1 is less slidable and easier to operate than a mere aluminum hand rim, and scratches and dirt are less noticeable.

  The hand rim 36 may be vinyl-coded on the surface instead of being shrunk. The hand rim 36 may be made of a resin material. Furthermore, the hand rim 36 may be made of mere aluminum.

  Further, as shown in FIG. 1, the back frame 2 is attached to the upper frame member 23 in the back frame portion 20. The back seat 2 will be described later.

<1-1-2. Main frame>
As shown in FIG. 3, the main frame portion 30 includes a lower main frame member 31 connected to the lower end portion of the lower frame member 21 of the back frame portion 20 and extending in the forward direction, and a lower end portion of the lower frame member 21. The upper main frame member 32 that extends forward from the vicinity and then curves downward and is connected to the front end of the lower main frame member 31, and the lower main frame member 31 and the upper main frame member 32. And a bending member 33 provided.

  As shown in FIG. 3, the lower main frame member 31 is connected to the vicinity of the lower end portion of the lower frame member 21 of the back frame portion 20 and extends in the front direction of the wheelchair 1. The lower main frame member 31 is linearly provided. Therefore, the wheelchair 1 can improve durability by eliminating the distortion caused by bending, compared to the case where the lower main frame member 31 is bent. Furthermore, since the wheelchair 1 can improve durability compared to the case where the bending process is performed, the lower main frame member 31 can be made thinner than the case where the bending process is performed. The weight can be reduced while maintaining or improving the same durability as the main frame member. Furthermore, since the wheelchair 1 can easily process the lower main frame member 31, accuracy can be improved and production efficiency can be improved.

  Further, as shown in FIG. 3, a front wheel attachment portion 31a to which a front wheel 35 is attached is provided at the front portion of the lower main frame member 31, and the front wheel 35 rotates downwardly toward the front wheel attachment portion 31a. It is attached freely. At this time, more preferably, the front wheel 35 and the rear wheel 34 are provided so that the phases thereof coincide with each other in plan view. That is, the left and right front wheels 35 and rear wheels 34 are provided so as to be aligned on substantially the same straight line parallel to each other. Thereby, the wheelchair 1 can respond | correspond even if the width | variety of the slope provided in the level | step-difference part etc. is narrow, for example.

  As shown in FIG. 3, the upper main frame member 32 is connected to the vicinity of the lower end portion of the lower frame member 21 of the back frame portion 20 and the front direction of the wheelchair 1 from the vicinity of the lower end portion of the lower frame member 21. The lower main frame member 31 is substantially parallel to the lower main frame member 31, and then curved downward, so that the lower end portion extends further downward than the front end portion of the lower main frame member 31. Is connected to the front end of the lower main frame member 31.

  Further, as shown in FIG. 1, a footrest 37 that supports a foot when the user gets on the wheelchair 1, for example, at the lower end of the upper main frame member 32 is substantially orthogonal to the axial direction of the upper main frame member 32. It is attached to the inside. The footrest 37 is formed of, for example, a resin material. Further, the footrest 37 is provided so as to be flipped up so as to be close to the upper main frame member 32 by rotating upward (outside). Further, the footrest 37 is provided so as to be adjustable in height (position change) by moving in the vertical direction along the upper main frame member 32.

  Furthermore, as shown in FIG. 2, the upper main frame member 32 is provided with a parking brake attachment frame member 39 for attaching a parking brake 38 used during parking. Furthermore, the grip part 38a of the parking brake 38 attached to the parking brake attachment frame member 39 may be provided smaller than the conventional product, so that a gap with the side frame part 40 (side plate 70 described later) may be provided larger.

  The upper main frame member 32 may further be provided with a foot belt (not shown) that supports the foot so as not to fall backward, above the footrest 37 near the lower end. In this case, the leg belt can be easily folded without being disturbed when the wheelchair 1 is folded in the width direction by adopting a heel loop type.

  As shown in FIG. 3, the bending member 33 extends between the lower main frame member 31 and the upper main frame member 32, and extends between the lower main frame member 31 and the upper main frame member 32. The upper main frame member 32 is provided so as to be substantially orthogonal. As shown in FIG. 4, the bending member 33 is provided so as to be bent in a substantially square shape at the front. Further, the bending member 33 is provided in the vicinity of the front end portion of the lower main frame member 31 so that the lower end portion is adjacent to the front wheel mounting portion 31 a of the lower main frame member 31. Therefore, since the wheelchair 1 is provided with the bending member 33 curved in a substantially U shape, when an impact or the like is applied to the front wheel 35, the lower main frame member 31, the upper main frame member 32, or the like, The impact can be absorbed by the elastic deformation of the bending member 33. Furthermore, since the wheelchair 1 is provided so that the bending member 33 is adjacent to the front wheel mounting portion 31a, the impact from the front wheel 35 can be effectively absorbed. Therefore, the wheelchair 1 can improve durability, rigidity, and strength. Note that the bending member 33 is not limited to be provided in a substantially U-shape, and may be any one that is provided in a curved shape and can be elastically deformed to absorb an impact. Alternatively, it may be provided in an arc shape, an S shape, a wave shape, or the like.

<1-1-3. Side frame section>
As shown in FIGS. 3 and 4, the side frame portion 40 includes an arm support member 42 to which an armrest 41 is attached on the upper side.

  As shown in FIG. 3, the arm support member 42 has an upper end coupled to the back folding bracket 22 of the back frame portion 20 and the lower main frame from the back folding bracket 22 of the back frame portion 20 to the front of the wheelchair 1. After extending substantially parallel to the member 31 and the upper main frame member 32, it is bent downward, and its lower end is connected to the vicinity of the upper end of the bending member 33. Therefore, since the arm support member 42 is connected to the bending member 33, the wheelchair 1 can effectively absorb the impact from the arm support member 42 (armrest 41). Therefore, the wheelchair 1 can improve durability, rigidity, and strength.

  Further, as shown in FIG. 2, an armrest 41 is attached to the upper side of the arm support member 42 so that the user can put his elbow or maintain the balance of the sitting position. The armrest 41 is made of, for example, wood or a resin material, and is formed in a columnar shape or a plate shape. The armrest 41 can be reduced in weight in the case of wooden than in the case of being formed of a resin material. When formed of a resin material, the armrest 41 is less likely to be damaged during cleaning or the like than in the case of a wooden material, and is easy to maintain. high. Furthermore, as shown in FIG. 7, the armrest 41 has a groove 41a in which the arm support member 42 is fitted on the lower surface. Such an armrest 41 is attached to the arm support member 42 by fitting the groove 41a to the arm support member 42 and fastening to the arm support member 42 with a fastening member such as a bolt from below.

  Furthermore, the armrest 41 is provided with an inclined portion 41c formed on the side surface portion 41b so that the width dimension gradually decreases from the upper surface portion 41d toward the lower surface portion 41e in a sectional view. That is, the armrest 41 is formed in a reverse trapezoidal shape in cross section. Therefore, the wheelchair 1 is provided with the inclined portion 41c formed on the side surface portion 41b so that the width dimension gradually decreases from the upper surface portion 41d toward the lower surface portion 41e in a cross-sectional view. Is provided so that it has the same area (width) as the upper surface of a rectangular cross-sectional view or a trapezoidal armrest, ensuring the same ease of use as a conventional cross-sectional rectangular or trapezoidal armrest. However, since the entire volume can be reduced as compared with the conventional product, the weight can be reduced.

  In addition, the armrest 41 is provided so that the upper surface portion 41d is larger in width than the upper surface portion of the conventional armrest, and the entire volume is reduced or the same volume as that of the conventional product, You may make it aim at the improvement of usability, aiming at weight reduction. Furthermore, the armrest 41 may be provided with an upper surface portion 41d so that the width dimension is smaller than that of the upper surface portion of the conventional armrest, so that the entire volume is reduced more than that of the conventional product, and the weight can be further reduced. .

  Further, as shown in FIGS. 1 and 2, a side plate 70 that protects the user from the rear wheel 34 is attached to the main body frame 10. The side plate 70 is made of, for example, wood or a resin material. The side plate 70 is disposed outside the main body frame 10 in the width direction, and one side surface portion is fastened and attached to the lower frame member 21 of the back frame portion 20 by a fastening member such as a bolt or a rivet. The side portion is fastened and attached to the arm support member 42 by fastening members such as bolts and rivets. In addition, the side plate 70 can be replaced with a standard tool by fastening with a bolt, and the replacement work can be easily performed.

<1-2. Cross frame>
Similar to the main body frame 10, the cross frame 11 is formed of a frame member formed of aluminum having a circular cross section, a polygonal shape, or the like. As shown in FIG. 3, this cross frame 11 connects a pair of main body frames 10 and 10 which have the above-mentioned structure so that folding is possible in the width direction. Specifically, the cross frame 11 has a pair of cross frame members 11a and 11a. The pair of cross frame members 11a, 11a is pivotally attached to the lower main frame member 31 via a connecting pin at the lower end, and is connected in an X shape by a rotating shaft at the center. The rotary shaft is provided so as to be capable of rotating relative to each other. Further, the cross frame member 11a has a seat frame 12 connected to an upper end portion thereof.

  Therefore, when the wheelchair 1 is folded, first, the pair of main body frames 10 and 10 are brought close to each other. Then, the upper end portions of the pair of cross frame members 11a and 11a are rotated upward, and the seat frame 12 is separated from the support 11b provided on the upper main frame member 32 of the main frame portion 30 to be paired with the pair of main bodies. The frames 10 and 10 can be folded in the width direction. Next, the wheelchair 1 can be folded in the width direction by bringing the pair of body frames 10 and 10 closer to each other. On the other hand, when the wheelchair 1 is returned from the folded state to the original use state, the pair of main body frames 10 and 10 are separated in the width direction, and the upper ends of the pair of cross frame members 11a and 11a are moved downward. And the seat frame 12 is fitted to the receiving tool 11b.

<1-3. Seat frame>
As with the main body frame 10 and the cross frame 11, the seat frame 12 is formed of a frame member made of, for example, a pipe having a circular cross section or a polygonal shape formed of aluminum. Specifically, the seat frame 12 is attached to the upper end portions of the cross frame members 11a and 11a of the cross frame 11, as shown in FIG. Further, as shown in FIG. 1, a seat sheet 3 is attached to the seat frame 12, and supports the user's buttocks and thighs via the seat sheet 3. The seat sheet 3 will be described later.

<1-4. Sheet>
<1-4-1. Back sheet>
As shown in FIG. 1, the back seat 2 is disposed between the back frame portions 20 and 20, and is fastened to the back frame portion 20 by a fastening member such as a bolt, so that the upper frame member 23 of the back frame portion 20. And it attaches to the lower frame member 21, and becomes a backrest which mainly supports a user's back. Further, the back sheet 2 is formed of, for example, a strong synthetic fiber such as polyamide or polyester, and is provided in a rectangular shape so as to correspond to the width and length between the back frame portions 20 and 20. .

  Furthermore, in the conventional back sheet, a sheet harder than the surface fabric called the interlining is put between the surface fabrics separately from the surface fabric, but the interlining is used without using the interlining. It is made of only the same strength fabric. Therefore, the wheelchair 1 can reduce the weight while maintaining the strength of the back seat 2. Furthermore, in the process of manufacturing the back seat 2, the wheelchair 1 can improve workability because the interlining is eliminated and the work process is reduced by one. Furthermore, since the back sheet 2 is formed only of a cloth having the same strength as the interlining, the breathability is improved as compared with the conventional back sheet constituted by a plurality of cloths such as the surface cloth and the interlining. Can be planned.

  Further, the back sheet 2 has a vertically long pattern on the surface. For example, on the surface of the back seat 2, as shown in FIG. 8, a plurality of rhombus symbols are formed over the entire surface, more preferably the longer diagonal of the rhombus is in the length direction of the back seat 2 (in FIG. (L1 direction) is provided along the entire surface, and a plurality of surfaces are provided. Therefore, the wheelchair 1 is provided with a vertically long pattern on the surface of the back seat 2, so that it looks slim and compact as a whole as compared with a horizontally long pattern.

  In addition, the pattern provided on the surface of the back sheet 2 is not limited to the rhombus, but may be any shape as long as it is long and makes the back sheet 2 look slim and compact as a whole. For example, it may be a long hole, a rectangle, a line along the length direction of the back seat 2 (the height direction of the wheelchair 1), or the like. Furthermore, the pattern does not have to be vertically long. Further, the surface of the back sheet 2 may not have a pattern.

<1-4-2. Seat seat>
As shown in FIG. 1, the seat 3 is disposed between the seat frames 12 and 12 and is attached to the seat frame 12 by being fastened to the seat frame 12 by a fastening member such as a bolt. Support the buttocks and thighs. Further, the seat sheet 3 is formed of a strong synthetic fiber such as polyamide or polyester like the back sheet 2 and has a rectangular shape corresponding to the width and length between the seat frames 12 and 12. Is provided.

  Further, in the seat sheet 3, in the conventional seat sheet, a sheet harder than the surface fabric called the interlining is put between the surface fabrics separately from the surface fabric, but the interlining is not used. It is made of only the same strength fabric. Therefore, the wheelchair 1 can reduce the weight while maintaining the strength of the seat 3. Furthermore, in the process of manufacturing the seat 3, the wheelchair 1 can improve workability because there is no interlining and one work process is reduced. Furthermore, since the seat sheet 3 is formed only of the cloth having the same strength as the interlining, the air permeability is improved as compared with the conventional seating sheet constituted by a plurality of cloths such as the surface cloth and the interlining. Can be planned.

  Furthermore, the seat sheet 3 has a vertically long pattern on the surface. For example, on the surface of the seat 3, as shown in FIG. 8, a plurality of rhombus symbols are formed over the entire surface, more preferably the longer diagonal of the rhombus is in the length direction of the seat 3 (in FIG. 1. L2 direction) is provided along the entire surface, and a plurality of surfaces are provided. Therefore, the wheelchair 1 is provided with a vertically long pattern on the surface of the seat 3, and thus looks generally slim and compact as compared with a horizontally long pattern.

  The pattern provided on the surface of the seat 3 is not limited to a rhombus, and may be any shape as long as it is vertically long and makes the seat 3 appear to be slim and compact as a whole. For example, it may be a long hole, a rectangle, a line along the length direction of the seat 3 (the front-rear direction of the wheelchair 1), or the like. Furthermore, the pattern does not have to be vertically long. The surface of the seat sheet 3 may not have a design.

<2. Modification>
The wheelchair 1 is not limited to the self-propelled type in which the hand rim 36 is attached to the outside of the rear wheel 34 and is driven and operated by the user, but the hand rim 36 is not attached to the outside of the rear wheel 34. Instead, an assistance type driven and operated by an assistant may be used.

  Furthermore, the wheelchair 1 is not limited to the fact that the upper frame member 23 of the back frame portion 20 can be folded backward, and the upper frame member 23 and the lower frame member 21 may be provided integrally. . In such a case, in addition to the various functions and effects described above, the wheelchair 1 can simplify the configuration and reduce the number of parts and the cost because the back folding bracket 22 is not provided.

  Furthermore, the wheelchair 1 is not limited to being able to fold the pair of main body frames 10, 10 in the width direction. For example, the seat frame 12 can be attached to the upper portion of the main frame portion 30 without providing the cross frame 11. You may make it provide in the upper surface side of the main frame member 32. FIG. In such a case, the wheelchair 1 can simplify the configuration, reduce the number of parts, and reduce the cost because the cross frame 11 is not provided, in addition to the various effects described above.

  Furthermore, the wheelchair 1 is not limited to the body frame 10, the cross frame 11, and the seat frame 12 being formed of aluminum. For example, the wheelchair 1 is made of a metal material such as titanium or stainless steel or carbon that is lighter than steel. It may be formed. Moreover, you may make it form with steel. Further, one frame may be made of aluminum and the other two frames may be made of different materials such as stainless steel. Further, the various frames constituting the main body frame 10 may be formed of different materials.

  Furthermore, the wheelchair 1 is not limited to braking the rear wheel 34 with the band brake 60, but may use other known brakes to brake the rear wheel 34.

  Furthermore, the vehicle provided with the band brake 60 to which the present invention is applied is not limited to the wheelchair 1 and may be another vehicle such as a bicycle.

DESCRIPTION OF SYMBOLS 1 Wheelchair, 2 back seats, 3 seats, 4 seats, 10 main body frame, 11 cross frame, 11a cross frame member, 11b receptacle, 12 seat frame, 20 back frame part, 21 lower frame member, 22 back folding bracket, 23 Upper frame member, 24 Grip, 25 Pusher part, 26 Rear wheel brake lever, 27 Brake wire, 30 Main frame part, 31 Lower main frame member, 31a Front wheel mounting part, 32 Upper main frame member, 33 Curved member, 34 Rear Wheel, 35 Front wheel, 36 Hand rim, 37 Footrest, 38 Parking brake, 38a Grip part, 39 Parking brake mounting frame member, 40 Side frame part, 41 Armrest, 41a Groove, 41b Side surface part, 41c Inclined part, 41d Upper surface part, 41 e Lower surface portion, 42 Arm support member, 50 Hub, 51a Hub flange, 51b Hub flange, 52 Hub shell, 53 Hub shaft, 60 Band brake, 61 Drum, 61a Main body portion, 62 Band, 63 Reinforcement member, 64 Cover member, 65 Lever, 65a pin, 70 side plate

Claims (5)

A vehicle having a band brake that brakes the wheel by tightening the outer periphery of the drum fixed to the hub of the wheel with a band,
A vehicle having a band brake provided with a reinforcing member formed of a second material different from the first material forming the drum at an outer peripheral portion of the drum.   2. The vehicle according to claim 1, wherein the second material has characteristics of higher wear resistance than the first material. A back frame member to which a back seat is attached;
A lower main frame member connected to a lower end portion of the back frame member and extending in the front direction, to which a front wheel and a rear wheel are attached;
An upper main frame member extending in the forward direction from the vicinity of the lower end of the back frame member,
A vehicle characterized in that a curved portion is provided between the lower main frame member and the upper main frame member across the lower main frame member and the upper main frame member. An arm support member to which the armrest is attached;
The vehicle according to claim 3, wherein a lower end portion of the arm support member is connected to the curved portion. A band brake that is attached to the back frame member and tightens an outer periphery of a drum fixed to the hub of the rear wheel with a band to brake the rear wheel;
The vehicle according to claim 3 or 4, wherein a reinforcing member made of a second material different from the first material forming the drum is provided on an outer peripheral portion of the drum.

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