JP3718663B2 - Brake wire mounting structure and wheelchair - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a brake wire mounting structure in which a brake wire is mounted on each of the mounting bases with respect to a handle such as a wheelchair handle or a bicycle handle that has a brake lever rotatably mounted on the mounting base.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, a handle for pushing an assistant in a wheelchair for assisting and a handle of a bicycle are both provided with a brake lever, an attachment for attaching the brake lever to the handle, and a brake wire for connecting to the brake lever.
Since it is very convenient for the assistant to provide a brake on the handle for pushing the assistant of the assistance wheelchair, and it is preferable in terms of safety such as downhill and sudden stop, it has become essential for the assistance wheelchair. Yes.
[0003]
On the other hand, a bicycle has been provided with a handle, a brake lever, a fixture, and a brake wire for a long time, and its structure has been stable without greatly changing.
[0004]
For this reason, the handle | steering-wheel, brake lever, fixture, and brake wire with which a wheelchair for assistance is equipped are the same as what was conventionally used for the bicycle from the functional surface and the cost surface.
[0005]
Here, the assisting wheelchair is generally formed to be foldable, whereas the bicycle is generally used in the same form without being folded.
Since the brake wire is always held at a fixed position in the bicycle, there is little need for retaining the mounting structure.
[0006]
On the other hand, assisting wheelchairs require a moderate amount of play in the brake wires in order to make them foldable. A problem occurs.
As a method for avoiding this problem, there is a method in which a thread groove is provided at one end of the outer of the brake wire and the outer is fixed to the mounting base with a nut.
[0007]
[Problems to be solved by the invention]
However, in the above-described brake wire mounting structure, it is necessary to screw the outer tip portion into the nut.
Moreover, since the thread groove is formed in the front-end | tip part of an outer, the part thickness became thin and the intensity | strength weakened.
[0008]
Furthermore, when rusting of the inner part or tearing of the outer part occurs due to long-term use and it is necessary to replace the brake wire, remove the mounting base from the handle and rotate the outer end of the outer part from the nut. I had to remove it. For this reason, the replacement is very time-consuming, and it is difficult for the general public to replace it, and sometimes it has to be brought to a store or the like.
[0009]
The present invention proposes a brake wire mounting structure that can easily mount an outer to a mounting base, improves safety, is durable and has high cost performance, and is inexpensive and highly convenient for brake wires, wheelchairs, and bicycles. To improve customer satisfaction.
[0010]
[Means for Solving the Problems]
According to the present invention, a brake lever is attached to a handle so as to be rotatable by a mounting base, one end of an inner of a brake wire is connected to the mounting base side of the brake lever, and the mounting base is provided facing the inner operating direction. A brake wire mounting structure that fixes a front end portion of the outer portion of the brake wire to a fixed portion and allows the brake operation by pulling out the inner by rotation of the brake lever from the fixed outer portion. the fixed portion, thereby forming a hole for rotatably held by inserting the distal end portion of the L-shaped insertion pipe with one end of the outer, a recess in the mouth rim of the hole, the insertion the tip of the pipe, forming a projection which forms a contact portion defining an insertion position into the hole and retaining fit in the rim of the hole by rotating together with the inserted into the recess of the hole to the wide angle side of the L-shaped Characterized in that the a brake wire attachment structure.
As a result, a brake wire mounting structure can be obtained in which the brake wire can be easily attached and the brake wire is not accidentally disconnected, and a wheelchair or bicycle that is easy to assemble and highly safe can be provided.
[0011]
The hole formed in the fixing portion of the mount includes forming a circle, an ellipse, a rectangle, a rectangle, or other shapes to allow rotation of the tip of the outer. In addition, it is desirable to form this hole circularly, In this case, the hole of a normal mounting base can be utilized as it is.
[0012]
The concave portion formed at the mouth edge of the hole includes a cut groove that allows the brake wire inner to be inserted into the hole from the end of the mounting base, including forming at one place or a plurality of places such as two places. Forming or forming a recess provided separately from the cut groove. The recess is preferably formed by a cut groove that allows the inner to be inserted into the hole from the end opposite to the handle of the mount. In this case, a cut groove of a normal mount is used. be able to.
[0013]
The contact portion formed at the distal end of the insertion pipe is formed by forming a reduced diameter portion at the distal end of the pipe shape and by the difference in diameter. The tip of the outer, such as a projection that is formed by punching and deforming a part of the side of the pipe by punching, or by welding the projection or ring slightly backward from the tip, etc. It includes forming at the contact part which controls the insertion amount of a part.
[0014]
In addition, it is desirable that the corresponding portion is formed by forming a reduced diameter portion at a pipe-shaped tip and the diameter difference between them, so that it is possible to withstand the load applied to the corresponding portion by a brake operation without any problem.
[0015]
The projection formed on the wide-angle side of the L- shape is formed by integrally forming at the time of molding, by forming the tip portion into a pipe shape and driving or welding a pin to the side surface on the tip side of the contact portion. And forming a part of the side surface by pinching or forming a part of the leading edge, and forming it at a plurality of places such as one place or two places. In addition, it is desirable to form this protrusion in one place, and by this, it can be easily inserted using a normal mounting base.
[0016]
With the above configuration, a brake wire mounting structure that can be easily mounted can be obtained, and the manufacturing cost can be reduced. In addition, the brake wire can be easily attached and detached, and maintenance such as replacement of the brake wire can be facilitated.
[0017]
In addition, the insertion pipe is inserted into the hole of the mounting base in a direction almost opposite to the usage state using the hole and the cut groove of the normal mounting base, and the protrusion is formed at the edge of the hole in the usage state. Can be secured.
[0018]
For this reason, it is possible to prevent unintentional attachment / detachment of the brake wire, such as disconnection of the brake wire while the wheelchair or bicycle is in use, or disconnection of the brake wire when the wheelchair is folded, thereby ensuring sufficient safety. it can.
[0019]
As a preferred embodiment, a buffer ring can be provided at a contact portion of the tip portion.
The buffer ring includes forming an elastic body such as a rubber material or a sponge material. In addition, it is desirable to use a rubber material with high hardness in order to withstand the load applied by the brake operation.
[0020]
With the above configuration, it is possible to prevent rattling at the insertion portion between the outer tip of the brake wire and the mounting base, and it is possible to prevent wear due to rattling. In addition, it is possible to prevent the direction of the brake wire from being changed due to factors such as vibration.
[0021]
Moreover, this invention can be made into the wheelchair provided with the said brake wire attachment structure.
The wheelchair includes a wheelchair for assistance provided with a handle for assistance.
With the above configuration, a wheelchair using a brake wire mounting structure that is easy to attach and detach can be actually provided, and convenience and safety of assistance for the user are improved.
[0022]
【The invention's effect】
According to the present invention, it is possible to provide a wheelchair or a bicycle that is easy to attach a brake wire, has excellent cost performance, and is highly safe, and can improve customer satisfaction.
[0023]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of the present invention will be described below with reference to the drawings.
First, together with the perspective view of the assisting wheelchair 1, the entire assisting wheelchair 1 is shown and the configuration necessary for the present invention will be described.
[0024]
Two wheels 2, 2 are provided on the back side of the assisting wheelchair 1, and a brake lever 4 is rotatably attached to the handle 2 via an attachment fitting 3.
One end of a brake wire 5 is attached to the brake lever 4, and the other end of the brake wire 5 is connected to a drum-type auxiliary brake 7 provided at the center of the wheel 6. Since the structure of the drum type assist brake 7 is well known, detailed description thereof is omitted.
[0025]
The assisting wheelchair 1 described above can be pushed by an assistant holding the handle 2, and when it is desired to stop or slow down, the handle 2 and the brake lever 4 are gripped together with the brake wire 5 and the drum type assist. The rotation of the wheel 6 can be stopped or suppressed via the brake 7.
[0026]
Next, the brake wire mounting structure will be described together with an enlarged side view (partial sectional view) around the handle 2 shown in FIG. In addition, (A) in a figure shows the front view of the mounting bracket 3 mentioned later, (B) shows the external appearance side view of the brake lever 4 of the locking ball 53a vicinity mentioned later.
[0027]
The handle 2 is fitted to the metal pipe 2c so as to cover the rubber rubber grip 2a, and the mounting bracket 3 is attached to the metal pipe 2c at a position in the vicinity of the fitting opening 2b of the rubber grip 2a.
[0028]
The mounting bracket 3 is attached by sandwiching the metal pipe 2c between the bracket body 3d and the bracket lid 3a, and in this state, the bracket body 3d and the bracket lid 3a are screwed together with a bolt nut 3b. Fix it.
[0029]
The lower part of the metal fitting main body part 3d is formed by a U-shaped fixing part 3e that fixes the outer cable 52 of the brake wire 5 to be described later, and a position near the lower end of the fixing part 3e is (A) As shown in FIG. 3, a circular hole 3f in the front-rear direction is formed, and a groove 3g penetrating downward from the hole 3f is formed.
In the vicinity of the metal pipe 2c side of the metal fitting main body portion 3d, a rod-like metal fitting 3c is inserted in the side surface direction (the front-rear direction in the figure), and the L-shaped brake lever 4 is pivotally supported by the metal fitting 3c.
[0030]
The brake lever 4 is formed with a hole 4a that is located in the vicinity of the outer corner side of the L-shaped bent portion and that opens toward one side as shown in FIG.
At the same time, an L-shaped groove 4b in a bottom view is inserted into the position adjacent to the hole 4a of the brake lever 4 so that the inner cable 53 of the brake wire 5 is inserted from the side surface so as to be swingable to the front side (left side in the figure). Form.
[0031]
The brake wire 5 includes an outer cable 52 formed of a flexible pipe-shaped sheath member, an inner cable 53 formed of a wire that can be moved through the outer cable 52, and one end of the outer cable 52. The outline is formed by an outer pipe 51 formed by bending a pipe-shaped hard metal prepared in the above into an L-shape.
[0032]
A drum-shaped locking ball 53 a is provided at the end of the inner cable 53 on the outer pipe 51 side, and the locking ball 53 a is inserted into the hole 4 a (B) of the brake lever 4, so that the brake lever 4 The inner cable 53 is connected to the.
[0033]
The outer pipe 51 is provided with a reduced diameter portion 51e formed at the distal end, and a projection 51a is formed on the outer periphery of the reduced diameter portion 51e. Further, a buffer ring 51b is attached to a step portion 51c which is a joint between the main body portion 51d of the outer pipe 51 and the reduced diameter portion 51e.
[0034]
With the above structure, when the assistant holds the rubber grip 2a from above and grasps the brake lever 4 with four fingers excluding the thumb, the brake lever 4 rotates about the metal fitting 3c, thereby the locking ball 53a. The inner cable 53 that is connected to the wheel 6 is pulled out from the outer cable 52 that is locked at the edge of the hole 3f, and the drum type assist brake 7 (FIG. 1) is operated to brake the wheel 6 (FIG. 1). be able to.
[0035]
Next, a method for attaching the brake wire 5 to the mounting bracket 3 and the brake lever 4 will be described with reference to the attachment explanatory views shown in FIGS. Note that (C), (D), (E), and (F) in the drawing are all perspective views of the vicinity of the handle 2 as viewed from the front lower right side.
[0036]
First, as shown in (C), the locking ball 53 a provided at one end of the inner cable 53 of the brake wire 5 is inserted into the hole 4 a of the brake lever 4. At this time, the inner cable 53 is fitted into the groove 4b.
[0037]
Next, as shown in (D), the brake wire 5 is rotated to the front side so that the inner cable 53 moves along the groove 4b around the locking ball 53a, and the inner cable 53 is attached to the mounting bracket. 3 through the hole 3f. At this time, the brake wire 5 is set in the mounting direction facing away from the use state so that the projection 51a of the outer pipe 51 faces downward corresponding to the groove 3g of the mounting bracket 3.
[0038]
Here, as shown in (E), the reduced diameter portion 51e of the outer pipe 51 is inserted into the hole 3f of the mounting bracket 3, and the brake wire 5 is rotated halfway to put it in use. At this time, the protrusion 51 a of the outer pipe 51 is on the upper side as shown in FIG. 2, and hits the edge of the hole 3 f of the mounting bracket 3 to prevent the outer pipe 51 from being pulled out.
[0039]
As described above, the brake wire 5 can be easily attached to the attachment fitting 3 and the brake lever 4. Even if the brake wire 5 is rotated at a right angle or more as shown by a phantom line in (F), the projection 51a of the outer pipe 51 is locked by the lip of the hole 3f of the mounting bracket 3 and cannot be removed. Can be avoided. That is, since the outer pipe 51 cannot normally rotate more than a right angle on a bicycle or a wheelchair, it can be avoided that the outer pipe 51 comes off during travel (that is, the brake wire 5 comes off) or comes off when the wheelchair is folded, Both safety and easy attachment / detachment can be achieved.
[0040]
The groove 3g of the mounting bracket 3 may not be provided directly downward from the hole 4a, but may be formed at an appropriate angle and obliquely downward. Alternatively, the protrusion 51a may be formed slightly above the outer pipe 51. It may be formed by shifting. Thereby, the outer cable 52 side of the outer pipe 51 can be attached not diagonally upward, but obliquely upward, so that attachment becomes easier and removal during maintenance becomes easy.
[0041]
Further, the groove 3g of the mounting bracket 3 may be formed with a minimum size through which the protrusion 51a of the outer pipe 51 can pass. As a result, it is necessary to attach the outer fitting 51 to the metal pipe 2c after the outer pipe 51 is attached to the fitting 3, and the outer pipe 51 cannot be removed when the fitting 3 is attached to the metal pipe 2c. That is, if the outer pipe 51 is rotated to a position where the projection 51a corresponds to the groove 3g of the mounting bracket 3, the outer pipe 51 or the outer cable 52 hits the metal pipe 2c on the way, and it is impossible to rotate to the removal position. It becomes possible. Thus, after the brake wire 5 is attached and shipped, the brake wire 5 cannot be removed unless the bolts and nuts 3b are loosened, and the safety can be further improved.
[0042]
In correspondence between the configuration of the present invention and the above-described embodiment,
The wheelchair of this invention corresponds to the assisting wheelchair 1 of the embodiment,
Similarly,
The mounting base corresponds to the mounting bracket 3 of the embodiment,
The recess corresponds to the groove 3g,
The insertion pipe corresponds to the outer pipe 51,
The contact portion corresponds to the protrusion 51a,
The tip corresponds to the reduced diameter portion 51e,
The outer corresponds to the outer cable 52,
The inner corresponds to the inner cable 53,
The present invention is not limited only to the configuration of the above-described embodiment, and many embodiments can be obtained.
[Brief description of the drawings]
FIG. 1 is a perspective view of an assisting wheelchair.
FIG. 2 is an enlarged side view (partial cross-sectional view) around the handle.
FIG. 3 is an explanatory diagram of attachment of a brake wire.
FIG. 4 is an explanatory diagram of attachment of a brake wire.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Wheelchair for assistance 2 ... Handle 3 ... Mounting bracket 3e ... Fixed part 3f ... Hole 3g ... Groove 4 ... Brake lever 5 ... Brake wire 51 ... Outer pipe 51a ... Protrusion 51b ... Buffer ring 51e ... Reduced diameter part 52 ... Outer cable 53 ... Inner cable

Claims (3)

Attach the brake lever to the handle so that it can rotate on the mounting base.
One end of the inner part of the brake wire is connected to the mounting side of the brake lever,
The front end portion of the outer of the brake wire is fixed to a fixing portion provided in the mounting base so as to face the operation direction of the inner,
A brake wire mounting structure that allows the brake operation by pulling out the inner by rotation of the brake lever from the fixed outer,
In the fixing portion of the mounting base, a hole for inserting and rotatably holding the tip of an L-shaped insertion pipe provided at one end of the outer is formed, and a recess is formed in the rim of the hole. ,
The distal end of the insertion pipe, thereby forming a contact portion defining an insertion position into the hole, the projections that retaining fit in the rim of the hole by rotating together with the inserted into the recess of the hole of the L-shaped Brake wire mounting structure formed on the wide angle side . The brake wire mounting structure according to claim 1 , further comprising a buffer ring at a contact portion of the tip portion . The brake wire mounting structure according to claim 1 or 2 is provided.
wheelchair.

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