JP2538530B2 - bicycle - Google Patents

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a bicycle.

[0002]

2. Description of the Related Art When a child or the like begins to ride a bicycle, it is difficult to keep the body in balance. Therefore, in order to prevent the bicycle from falling, supplementary wheels are attached to one or both sides of the rear axle of the rear wheel of the bicycle to practice riding. After that, when the balance can be maintained sufficiently even without auxiliary wheels, the auxiliary wheels are removed. Usually, the auxiliary wheel also plays the role of a stand for supporting the bicycle when the vehicle is stopped, so that it is necessary to attach the stand instead of removing the auxiliary wheel.

[0003]

In such a work of replacing the auxiliary wheel with the stand, the lock nut of the rear axle must be once removed and then attached again. Therefore, at that time, the rear axle rotates, and the tension between the front and rear gears of the chain becomes excessively strong or loosens, which easily affects the adjustment state of other components. In other words, there is a problem that it is difficult to perform the replacement work in a general household because it is difficult for the replacement work to be performed by a person who does not have a specialized bicycle-related technique such as adjustment of the stretched state of the chain.

An object of the present invention is to provide a bicycle which can be easily replaced in a general household without requiring specialized knowledge or expertise regarding the replacement work between the auxiliary wheel and the stand.

[0005]

The present invention has taken the following technical means in order to achieve the above object. That is, according to the present invention, at least one side of the rear axle (10) of the bicycle (1) is replaceably connected to either one of the auxiliary wheels (3, 53) and the stand (4, 54). Connecting members (2, 22, 32, 42) of the auxiliary wheels are attached to the lower part of the connecting members.
3, 63) or a fixing means for fixing the upper part (14, 64) of the stand.

The present invention is also characterized in that a leaf spring (9) is used as the fixing means. Furthermore, the present invention is characterized in that bolts (29a, 35a, 46) are used as the fixing means. Furthermore, according to the present invention, the connecting member (2) comprises a plate-shaped part (5) and a socket part (6), and the mounting hole (7) for the axle (10) is provided on the plate-shaped part (5). The socket portion (6) is provided with a concave portion (6a) into which the lower end portion of the plate-like portion (5) is fitted and fixed at the upper end portion, and the upper portion of the auxiliary wheel (3) ( 13) or a recess (8) for fitting the upper part (14) of the stand (4) is provided so as to open downward, and a spring is provided at one side of the socket part (6) inwardly of the recess (8). A leaf spring (9) for urging is continuously provided, and a part of the leaf spring (9) is provided on the upper portion (13) of the auxiliary wheel (3) and the upper portion (14) of the stand (4). Mounting holes to fit (12, 21)
Is provided.

Further, according to the present invention, the connecting member (42) is plate-shaped, and the mounting hole (43) for the axle (10) is provided on the upper portion thereof.
And an attachment hole (44) for fixing the upper portion (63) of the auxiliary wheel (53) or the upper portion (64) of the stand (54) with a bolt in the middle,
The lower end is bent in the direction of the axle (10), and an insertion hole (45) for inserting the upper part (63) of the auxiliary wheel (53) or the upper part (64) of the stand (54) near the bent part. Is provided, and is attached to the upper part (63) of the auxiliary wheel (53) and the upper part (64) of the stand (54) together with the mounting hole (44) by a bolt (46). 66) is provided.

[0008]

According to the present invention, the connecting member is attached to at least one side of the rear axle of the bicycle. A fixing means is provided below the connecting member, and the upper portion of the auxiliary wheel or the upper portion of the stand is replaceably fixed using the fixing means. Since the auxiliary wheel or the stand is not directly fixed to the rear axle but is connected to the rear axle via the connecting member, the rear axle does not rotate and does not affect other parts during the replacement work.

Further, it is preferable to use a leaf spring or a bolt as the fixing means. When a leaf spring is used, the configuration according to the present invention of claim 4 is particularly preferable, and according to the present invention, the plate-shaped portion is attached to the axle using a bolt or the like through the attachment hole. The plate-shaped portion and the socket portion are connected by fitting and fixing the lower portion of the plate-shaped portion in the recess provided in the upper end portion of the socket portion. The upper part of the auxiliary wheel or the upper part of the stand is fitted into the recessed part opened below the socket part in a state where the plate spring is moved outward, and the plate spring returns to its original shape and the upper part of the auxiliary wheel or The connection member and the auxiliary wheel or the stand are connected and fixed by fitting into the mounting hole provided on the upper part of the stand.

When a bolt is used, the structure according to the present invention of claim 5 is particularly preferable, and according to the present invention, the connecting portion is attached to the axle via the attachment hole using a bolt or the like. The upper part of the auxiliary wheel or the upper part of the stand is inserted through the insertion hole, and the mounting hole provided in the middle part of the connecting member and the mounting hole provided on the upper part of the auxiliary wheel or the upper part of the stand are tightened and fixed using bolts. By doing so, the connecting member and the auxiliary wheel or stand are connected and fixed.

[0011]

FIG. 1 is a bicycle 1 according to a first embodiment of the present invention.
3 is a cross-sectional view showing the configuration in the vicinity of the connecting member 2 of FIG. 2, FIG. 2 is a perspective view of the connecting member 2, the auxiliary wheel 3 and the stand 4 from the front direction, and FIG. 3 is a perspective view of the connecting member 2 from the rear direction. FIG. 4 is a side view showing the rear portion of the bicycle 1.

A connecting member 2 is attached to both sides or one side of the rear axle 10 of the bicycle 1. When installing,
The lock nut 10a screwed to the end of the rear axle 10 and the stay 20 such as the Dorayoke stay 20a and the seat stay 20b attached to the rear axle are temporarily removed, and the attachment provided on the upper portion of the connecting member 2 which will be described later. Rear axle 1 with hole 7
Insert into 0. After that, the stay 20 is attached again and the lock nut 10a is screwed to prevent the stay from coming off.

The connecting member 2 is made of a material such as metal or synthetic resin, and includes a plate portion 5 and a socket portion 6.
The mounting hole 7 is formed near the center of the upper portion of the plate-shaped portion 5. Further, the lower end portion of the plate-shaped portion 5 has a socket portion 6 described later.
It is fitted and fixed in a concave portion 6a that opens above the upper end portion. Preferably, the lower end portion is fixed to the socket portion 6 by insert molding or the like.

The socket portion 6 is in the shape of a socket and has a recess 8 which opens downward. Further, a leaf spring 9 is continuously provided at the center portion in the width direction on the back side of the socket portion 6 (on the right side in the drawing of FIG. 1). The leaf spring 9 includes a base end portion 9a and a central portion 9
b, the free end portion 9c. The base end portion 9a is formed in a plate shape that is substantially flush with the other portions, and the central portion 9b extends from the base end portion 9a to the recess 8
Bend to the side. The free end portion 9c extends outward from the central portion 9b (on the side opposite to the concave portion 8 side). A protective portion 11 is provided at the lower end on the rear surface side of the socket portion 6 so as to surround the outside of the free end portion 9c of the leaf spring 9.

Next, the connecting operation of the bicycle 1 and the auxiliary wheel 3 via the connecting member 2 will be described with reference to FIG. In the state where the auxiliary wheels 3 are connected, FIG.
As shown in, the upper portion 13 of the auxiliary wheel 3 is fitted into the recess 8 of the socket portion 6. A mounting hole 12 is formed in the upper portion 13 of the auxiliary wheel 3, and the central portion 9b of the leaf spring 9 is fitted into and engaged with the mounting hole 12. As a result, the upper portion 13 of the auxiliary wheel 3 does not fall out of the recess 8 of the socket 6 when no external force is applied, so that the auxiliary wheel 3 is stably held.

When the auxiliary wheel 3 is detached from the connecting member 2, the free end portion 9c of the leaf spring 9 is moved in the direction of arrow A, as shown in FIG. 1 (2). As a result, the central portion 9b of the leaf spring 9 escapes from the mounting hole 12 and the engaged state is released. Therefore, the upper portion 13 of the auxiliary wheel 3 is not
Can be pulled out downward (along arrow B).

Since the protection portion 11 surrounds and protects the free end portion 9c, an external object inadvertently contacts the free end portion 9c and the engagement between the central portion 9b and the mounting hole 12 is eliminated. Can be prevented. After removing the auxiliary wheel 3, stand 4
1 is attached to this connecting member 2, the free end 9c of the leaf spring 9 is moved in the direction of arrow A as shown in FIG. After that, the leaf spring 9 is released from the applied force. Leaf spring 9
Returns to its original shape, and the central portion 9b is the upper portion 1 of the stand 4.
4 is fitted into the mounting hole 21 provided in FIG. 4, and a state similar to that of FIG. However, the auxiliary wheel 3 shown in FIG. 1 is replaced with the stand 4. The removal of the stand 4 and the attachment of the auxiliary wheel 3 are performed from the auxiliary wheel 3 to the stand 4 described above.
It is the same as the replacement to.

As described above, in the work of replacing the auxiliary wheel 3 and the stand 4 on the bicycle 1, it is not necessary to directly touch the rear axle 10. Therefore, the adjustment state of other parts of the bicycle 1 is not affected. Moreover,
Since the positioning can be performed simply by inserting the upper portions 13 and 14 of the auxiliary wheel 3 or the stand 4 to be replaced in the recessed portion 8 of the socket member 6, even an ordinary person who does not have specialized knowledge or technical skills can easily perform the work. Further, since the leaf spring 9 provided on the connecting member 2 can be attached and detached only by pressing it in the arrow A direction, a tool such as a screwdriver is unnecessary.

FIG. 5 is a sectional view showing the structure around the connecting member 22 according to the second embodiment of the present invention. The parts corresponding to those in the first embodiment are designated by the same reference numerals. Connecting member 2
2 is made of a material such as metal or synthetic resin, and the protrusion 2
4 and a socket-shaped base portion 23. The protrusion 24 is the base 2
3 is a plate-like member that is continuously provided so as to project from the upper surface of the mounting plate 3, and a mounting hole 27 is provided near the center thereof. This mounting hole 27
The rear axle 10 is inserted therethrough, and the connecting member 22 is connected to the bicycle 1. The base portion 23 has a recess 28, and mounting holes 25 and 26 are formed in both side portions 22a and 22b in the mounting direction (left and right direction of the paper surface of FIG. 5). This mounting hole 25,
26 is provided at a position corresponding to the mounting hole 12 provided in the upper portion 13 with the upper portion 13 of the auxiliary wheel 3 fitted in the recess 28.

When the connecting member 22 and the auxiliary wheel 3 are mounted, the upper portion 13 of the auxiliary wheel 3 is fitted into the recess 28, and the bolt 29a is inserted into the mounting holes 26, 12, 25.
Fasten using the nut 29b. The same applies to the attachment of the connecting member 22 and the stand 4. As a result, as in the first embodiment, it is not necessary to directly touch the rear axle 10 in the work of replacing the auxiliary wheel 3 and the stand 4, so that the adjustment state of other parts of the bicycle 1 is not affected. . Moreover, since the positioning can be performed only by inserting the upper portions 13 and 14 of the auxiliary wheel 3 or the stand 4 to be replaced with the socket-shaped member, even an ordinary person who does not have specialized knowledge or technical skills can easily perform the work.

FIG. 6 is a cross-sectional view showing the structure in the vicinity of the connecting member 32 according to the third embodiment of the present invention. The parts corresponding to those in the first embodiment are designated by the same reference numerals. Connection member 3
2 is made of a material such as metal or synthetic resin, and has a substantially plate shape. Attachment holes 33 and 34 are formed in the connecting member 32 near its upper portion and lower portion, respectively. The rear axle 10 is inserted into the mounting hole 33 provided in the upper portion and fixed by the lock nut 10a, so that the bicycle 1 can be mounted in the same manner as in the first embodiment.
When mounting the auxiliary wheel 3 or the stand 4, a bolt 35a is attached to the mounting hole 34 provided in the lower portion and the mounting hole 12 provided in the upper portion 13 of the auxiliary wheel 3 or the mounting hole 21 provided in the upper portion 14 of the stand 4. Through the nut 35
It is concluded using b.

As a result, similarly to the first embodiment, it is not necessary to directly touch the rear axle 10 in the work of replacing the auxiliary wheel 3 and the stand 4, which affects the adjustment state of other parts of the bicycle 1. Never. Therefore, even an ordinary person who does not have specialized knowledge or expertise can easily perform the work. 7 is an exploded perspective view showing a structure around a connecting member 42 according to a fourth embodiment of the present invention, FIG. 8 is a perspective view showing the connecting operation, and FIG. 9 is a sectional view in a connected state. .

The connecting member 42 is a substantially plate-like member made of metal, synthetic resin or the like, and an attachment hole 43 for connecting to the rear axle 10 is provided in the upper portion thereof. The midway portion is wide in a substantially step shape, and a mounting hole 44 for connecting an upper portion 63 of an auxiliary wheel 53 or an upper portion 64 of a stand 54, which will be described later, is provided near the midway portion. The vicinity of the lower end portion is bent substantially vertically to the rear side (the bicycle 1 side). An insertion hole 45 for inserting the upper portion 63 of the auxiliary wheel 53 or the upper portion 64 of the stand 54 is inserted in the vicinity of the bent portion.
Has been drilled.

When the connecting member 42 and the auxiliary wheel 53 or the stand 54 are attached, the upper portion 63 of the auxiliary wheel 53 or the upper portion 64 of the stand 54 is inserted into the insertion hole 45. Each state before and after this insertion is shown in FIG.
It shows with (B). Although only the stand 54 is shown in the drawing, the same applies to the auxiliary wheels 53. In the upper portion 63 of the auxiliary wheel 53 and the upper portion 64 of the stand 54, mounting holes 65 and 66 are provided at positions overlapping the mounting hole 44 in such a state that they are inserted into the insertion hole 45, respectively. The bolts 46 are fastened to the mounting holes 65 or 66. A washer 47 for preventing rotation of the bolt 46 and a washer 48 for preventing wear and damage of the peripheral portion of the mounting hole 44 are preferably sandwiched between the bolt 46 and the connecting member 42.

Therefore, as in the case of the above-described embodiment, it is not necessary to directly touch the rear axle 10 when replacing the auxiliary wheel 53 and the stand 54, which may affect the adjustment state of other parts of the bicycle 1. Therefore, even an ordinary person who does not have specialized knowledge or expertise can easily perform the work. Further, according to the present embodiment, the upper portion 63 of the auxiliary wheel 53 or the upper portion 64 of the stand 54 is inserted into the insertion hole 45, so that the connecting member 42 and the upper portion 6 are attached at the time of mounting.
Positioning with 3 or the upper part 64 can be performed easily. At the same time, in the connected state, the auxiliary wheel 53
Alternatively, since the stand 54 does not swing, it is possible to prevent the bolt 46 from loosening and maintain a stable connected state. Moreover, since the connecting member 42 has a simple structure, it is inexpensive and has good manufacturing efficiency.

The mounting hole 44 may be a long hole that is long in the vertical direction, as shown by the alternate long and short dash line in FIG. In this case, an error in the vertical positional relationship between the mounting hole 44 and the mounting hole 65 or the mounting hole 66 is allowed, and at the same time, the auxiliary wheel 53 or the stand 54 can be adjusted to a desired height. Further, when such height adjustment is intended, the mounting hole 44 having a shape as shown in FIG. 10 can prevent inadvertent movement in the vertical direction, which is preferable.

The structure of the present invention is not limited to the above-mentioned embodiment, and the details can be changed in design as appropriate. For example, the stand attached to the bicycle via the connecting member is not limited to the one-leg stand as in the embodiment, but may be a substantially U-shaped stand attached to both sides of the rear axle. Further, the fixing means is not limited to the leaf springs or bolts described above. For example, a cord-like body fixed to the socket 6 of the connecting member 2 according to the first embodiment by not inserting the plate spring 9 into the socket 6 or inserting it into a mounting hole or a projection of a stand or a stand. It may be configured to provide a latch.

[0028]

According to the present invention, since it is not necessary to directly touch the rear axle when replacing the auxiliary wheel and the stand on the bicycle, the adjustment state of other parts of the bicycle is not affected. Therefore, even an ordinary person who does not have specialized knowledge or expertise can easily perform the work. As a result, the replacement can be performed at home many times, so that the auxiliary wheel can be used whenever necessary, and the safety of bicycle traveling and the usability of the bicycle are improved.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a structure around a connecting member 2 of a bicycle 1 according to a first embodiment of the present invention.

FIG. 2 is a perspective view of a connecting member 2, an auxiliary wheel 3 and a stand 4 as viewed from the front.

FIG. 3 is a perspective view of a connecting member 2 as viewed from the back side.

FIG. 4 is a side view showing a rear portion of the bicycle 1.

FIG. 5 is a cross-sectional view showing a configuration near a connecting member 22 according to a second embodiment of the present invention.

FIG. 6 is a cross-sectional view showing a structure around a connecting member 32 according to a third embodiment of the present invention.

FIG. 7 is an exploded perspective view showing a configuration near a connecting member 42 according to a fourth embodiment of the present invention.

8 is a perspective view showing a connecting operation of the connecting member 42 and the stand 53. FIG.

FIG. 9 is a cross-sectional view of the connecting member 42 and the stand 53 in a connected state.

FIG. 10 is a view showing a mounting hole 44 which is a preferred embodiment.

[Explanation of symbols]

1 Bicycle 2,22,32,42 Connection member 3,53 Auxiliary wheel 4,54 Stand 6a, 8 Recessed portion 7,12,21,25,26,34,43,44 Mounting hole 9 Leaf spring 10 Rear axle 13,63 Upper part of auxiliary wheel 14,64 Upper part of stand 29a, 35a, 46 Bolt 29b, 35b Nut 45 Insertion hole

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Yasuhiro Senjo 5-27, Takaidahondori, Higashi-Osaka City, Osaka Prefecture -2 OGK Giken Co., Ltd. 27-chome -2 AOKI Giken Co., Ltd. (72) Inventor Masayuki Masayuki 5-27, Takaidahondori, Higashi-Osaka-shi, Osaka Prefecture -2 AUGK Giken Co., Ltd.

Claims (5)

(57) [Claims] 1. An auxiliary wheel (3, 53) and a stand (4) on at least one side of the rear axle (10) of the bicycle (1).
54) is attached with a connecting member (2, 22, 32, 42) for connecting either one of them with the bicycle in a freely replaceable manner, and the connecting member lower part has an upper part (13, 63) of the auxiliary wheel. ) Or the top of the stand (14, 64)
A bicycle having a fixing means for fixing the bicycle. 2. Bicycle according to claim 1, characterized in that a leaf spring (9) is used as fixing means. 3. Bolts (29a, 35) as fixing means
The bicycle according to claim 1, characterized in that a, 46) is used. 4. The connecting member (2) comprises a plate portion (5) and a socket portion (6), and an axle (1) is provided on an upper portion of the plate portion (5).
0) is provided with a mounting hole (7), and the socket portion (6) is provided with a concave portion (6a) into which the lower end portion of the plate-like portion (5) is fitted and fixed at the upper end portion. , A recess (8) for fitting the upper part (13) of the auxiliary wheel (3) or the upper part (14) of the stand (4) is provided with an opening downward, and the socket part (6) is provided at one side with the above-mentioned concave part (8). A leaf spring (9), which is spring-biased inwardly of the recess (8), is continuously provided, and an upper portion (13) of the auxiliary wheel (3) and a stand (4) are provided.
The bicycle according to claim 2, wherein a mounting hole (12, 21) into which a part of the leaf spring (9) is fitted is provided in an upper portion (14) of the bicycle. 5. The connecting member (42) is plate-shaped, a mounting hole (43) for the axle (10) is provided in the upper part, and an upper part (63) of the auxiliary wheel (53) is provided in the middle part. ) Or an upper portion (64) of the stand (54) is provided with a mounting hole (44) for fixing the upper portion (64) with a bolt, and a lower end portion is bent in the direction of the axle (10) and an auxiliary portion is provided near the bent portion. Wheel (53) top (63) or stand (54)
Is provided with an insertion hole (45) for inserting the upper part (64) of the auxiliary wheel (53), and the upper part (64) of the auxiliary wheel (53) and the upper part (64) of the stand (54) have bolts (4).
Bicycle according to claim 3, characterized in that mounting holes (65, 66) which are fastened together with the mounting holes (44) by 6) are provided.