JP2010222002A - Attaching/detaching structure of main member of bicycle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a structure for substantially disabling to use a bicycle in a normal way even when a lock is broken or opened. <P>SOLUTION: Fitting parts 11, 12 formed on a body of a bicycle and fitted parts 41, 62 formed on a main member can be abutted on and fitted to each other, and the fitting parts and the fitted parts can be separated and detached from each other. The fitting parts of the body and the fitted parts of the main member have uneven structures K12, K62 corresponding each other. The uneven structures are configured to be individual for an individual body of the bicycle, and not corresponded to and not fitted to the fitted parts of the different individual main members to prevent any theft. For example, the main member is a crank, the fitting parts on the body side are located on a side surface of a rotary cylinder of a sprocket wheel, and the fitted parts on the main member side are located on a side surface of a crankshaft. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  In the present invention, a crank to which a bicycle pedal is attached is configured to be detachable with respect to the bicycle body side, and the crank and the body side have a specific fitting structure, so that other than a specific combination. The present invention relates to a technique for preventing theft by configuring the crank and the main body so that they cannot be fitted.

  Conventionally, in order to prevent theft of a bicycle, a fixed lock or a chain lock is attached, and a person with a specific key corresponding to the lock or a password set on the lock is assigned. Only people who know it can unlock it and use it.

Fig. 8 of Japanese Patent Publication No. 02-229

  However, such a lock can be broken or unlocked with a tool, etc., and if it is broken or unlocked, the bicycle can be used normally. It was not an anti-theft measure.

  Moreover, although it is a technique different from anti-theft measures, as shown in Patent Document 1, there is known a structure for attaching / detaching a pedal that interferes with transportation and a structure for facilitating crank replacement. . In the case of a bicycle having such a structure, when leaving and leaving the bicycle, if the pedal or crank is removed and carried, there is no pedal or crank even if another person tries to use the bicycle without permission. Although it cannot be used for depression, it may have some anti-theft effect. However, if the pedals and cranks are the same type of bicycle, they are often manufactured to a common standard in order to ensure the compatibility of the parts. If you attach another pedal or crank that you have, you can easily use it as a bicycle. This is not an effective anti-theft measure.

Therefore, the present invention provides a structure that makes it impossible to use the bicycle normally even if the bicycle whose owner is not nearby can be broken or unlocked. It was made for the purpose.

The attachment / detachment structure of the main member of the bicycle according to claim 1 of the present invention is:
The fitting portion formed on the main body of the bicycle and the fitted portion formed on the main member can be brought into contact with each other and fitted, and the fitting portion and the fitted portion are separated from each other. Configured to be able to leave
The fitting portion of the main body and the fitted portion of the main member have a concavo-convex structure corresponding to each other,
The uneven structure is an individual structure for each individual bicycle,
It was constructed so that it could not be fitted and could not be fitted with the fitted parts of the main members of different individuals, so that theft could be prevented.
In claim 2,
The main member is a crank;
The fitting portion on the main body side is located on the side surface of the rotating cylinder of the sprocket wheel,
The fitted portion on the main member side is located on the side surface of the crank shaft.
In claim 3,
The main member is a pedal,
The fitting portion on the main body side is located on the side surface of the end portion of the crank,
The fitted portion on the main member side is located on the side surface of the pedal shaft.

In the bicycle detachable structure according to claim 1,
The fitting portion formed on the main body of the bicycle and the fitted portion formed on the main member can be brought into contact with each other and fitted, and the fitting portion and the fitted portion are separated from each other. Configured to be able to leave
The fitting portion of the main body and the fitted portion of the main member have a concavo-convex structure corresponding to each other,
The uneven structure is an individual structure for each individual bicycle,
Since it is configured so that it does not correspond to the mating part of the main member of a different individual and can not be fitted,
If the owner of the bicycle leaves the bicycle and carries the main member separated from the main body,
Even if another person tries to use the bicycle without permission from the owner, the bicycle cannot be normally used as a bicycle because there is no main member.
Accordingly, the bicycle is less likely to be stolen and an anti-theft effect can be obtained.
Even if the same kind of bicycle main parts are brought, the attachment / detachment structure cannot be fitted unless it is a specific main part. Therefore, even in such a case, an antitheft effect can be obtained.

In the invention according to claim 2,
Since the main member is a crank,
When the owner of the bicycle leaves the bicycle and carries the crank separated from the main body,
Even if another person tries to use the bicycle without permission from the owner, it cannot be used normally as a bicycle because there is no crank.
Accordingly, the bicycle is less likely to be stolen and an anti-theft effect can be obtained. In the invention according to claim 3,
Since the main member is a pedal,
When the owner of the bicycle leaves the bicycle and carries the pedal separately from the main body,
Even if another person tries to use the bicycle without permission from the owner, the bicycle cannot be used normally because there is no pedal.
Accordingly, the bicycle is less likely to be stolen and an anti-theft effect can be obtained.

It is the side view and sectional drawing of the principal part of the attachment or detachment structure of the main member of the bicycle concerning the present invention. It is a perspective view of the principal part of the attachment / detachment structure of the main member of the said bicycle. It is a side view of the bicycle retaining structure. It is a side view of the folding bicycle of Example 2.

In FIG. 1 which showed the cross section of the principal part of the attachment or detachment structure of the main member of the bicycle which concerns on this invention,
BB is a bottom bracket portion disposed at the lower part of the frame of the bicycle, and the rotating cylinder 1 is rotatably inserted into the bottom bracket portion BB using a bearing. A sprocket wheel 2 is integrally fixed to one end surface of the rotary cylinder 1, and a chain (omitted) is wound around the sprocket wheel 2, and the driving force applied to the sprocket wheel 2 is It is configured to be transmitted to the rear wheel of the bicycle.

  A specific concavo-convex structure K11 is formed in the fitting portion 11 on one end surface of the rotating cylinder 1, and another concavo-convex structure K12 different from the concavo-convex structure is formed on the fitting portion 12 on the other end surface. . The specific structures on both sides can be the same.

Reference numeral 3 denotes a rotating shaft, which is configured to be inserted into the rotating cylinder 1.
One end of one crank 4 is connected to one end of the rotating shaft 3, and one pedal 5 is rotatably attached to the other end of the crank 4.
As illustrated, the crank 4 may be connected to the rotating shaft 3 so as to be foldable.
As shown in FIG. 2, the fitted portion 41 on the surface of the crank 4 that is in contact with the fitting portion 11 of the rotating cylinder 1 in use corresponds to the specific concavo-convex structure K11. The specific concavo-convex structure K41 is formed.
One end of another crank 6 can be attached to and detached from the other end of the rotary shaft 3, and another pedal 7 is rotatably attached to the other end of the crank 6. Yes.
A specific concavo-convex structure K62 corresponding to the specific concavo-convex structure K12 is formed in the fitted portion 62 at the base of the crank 6 and in contact with the fitting portion 12 of the rotating cylinder 1 in use. Has been.

  An arcuate or circumferential groove 31 is formed on the peripheral surface of the other end of the rotating shaft 3. When the crank 6 is mounted, the crank 6 has one end formed in the groove 31. A retaining member 61 configured to be fitted is provided so as to be detachable. When the retaining member 61 is detached from the groove 31, the crank 6 can be pulled out from the rotating shaft 3, and the retaining member 61 is inserted in the end of the rotating shaft 3. Is fitted in the groove 31, the crank 6 is fixed in an engaged state where it cannot be pulled out from the rotating shaft 3. The groove 31 and the retaining member 61 form a retaining structure 8.

An example of the retaining structure 8 will be described with reference to FIG.
A retaining member 61 constituting the retaining structure 8 is rotatably supported by a support shaft 81 at one end on the rotating shaft side of the crank 6, and the tip of the retaining member 61 is further supported by a spring 82. It is urged toward the rotating shaft.
When a force is applied to the operating portion of the retaining member 61 and pushed down against the spring 82, the tip is moved away from the groove 31 of the rotating shaft 3, and when the force applied to the operating portion is removed, the spring 82 is elastically restored. The tip of the retaining member 61 is fitted into the groove 31 of the rotating shaft 3 by force.
In this way, the retaining structure 8 by the retaining member 61 and the groove 31 is configured.

The rotary shaft 3 is inserted into the rotary cylinder 1, the crank 4 is set at a position perpendicular to the rotary shaft 3 at one end of the rotary shaft 3, and the other end of the rotary shaft 3 is set at the other end. When the crank 6 is inserted and set in a state orthogonal to the rotary shaft 3, and the crank 6 is not pulled out by the retaining structure 8,
Since the concavo-convex structure K41 of the crank 4 is a concavo-convex structure corresponding to the concavo-convex structure K11 on the end surface of the rotary cylinder 1, they are fitted together and integrally connected.
Further, since the concavo-convex structure K62 of the crank 6 is a concavo-convex structure corresponding to the concavo-convex structure K12 on the end surface of the rotating cylinder 1, they are fitted to each other and integrally connected.

When the two pedals 5 and 7 are alternately depressed in the coupled state as described above, the force applied to the pedal 5 is transmitted to the concavo-convex structure K41 via the crank 4, and the concavo-convex The force transmitted to the structure K41 is transmitted to the concavo-convex structure K11 without slipping around due to the fitting structure, and transmitted to the rotary cylinder 1.
Further, the force applied to the pedal 7 is transmitted to the concavo-convex structure K62 via the crank 6, and the force transmitted to the concavo-convex structure K62 is not slid due to idle rotation or the like by the fitting structure. And transmitted to the rotary cylinder 1.
In this way, the rotary cylinder 1 is rotated by the force applied via the two cranks 5 and 7, and the sprocket wheel 2 fixed to the rotary cylinder 1 is rotationally driven, and further via the chain. The bicycle can be advanced by rotating the rear wheel.

The above description describes the procedure and operation when the bicycle is used. In the following, the procedure when the owner leaves the bicycle will be described.
When putting a bicycle away from the bicycle, it is usually only a lock, but with that alone, there is a risk of theft, so in the case of a bicycle equipped with a structure for attaching and detaching the main member of the bicycle according to the present invention, Remove the main crank and put it in a bag or bag. The crank can be easily removed by simply pulling out a part of the retaining member 61 of the retaining structure 8 from the groove 31 and releasing the engaged state.
The connecting portion between the crank 6 and the rotary shaft 3 can be folded around the folding shaft 63 so that it can be carried more easily.
A storage bag for storing the removed cranks may be prepared.

Next, the anti-theft effect when the crank is removed and carried as described above will be described.
If expensive bicycles are placed on the streets in front of the station, the risk of theft increases. However, if the bicycle does not have a crank, it is apparent that it is difficult to use it as a bicycle even if it is stolen.
This is because in order to prepare a crank that can be used for the bicycle, it is necessary to precisely measure the uneven structure formed on the rotating cylinder of the bicycle and to manufacture a crank with a corresponding uneven structure. is there.
Even if a person who owns the same type of bicycle tries to put on a crank for his / her bicycle, it will not be useful for other bicycles because the uneven structure does not match, so he will give up stealing.
In this way, according to the bicycle main member attachment / detachment structure according to the present invention, by removing the crank and carrying it to the body, it is not useful for a bicycle without a crank, so that the bicycle is prevented from being stolen. It can be done.
Moreover, not only the anti-theft effect but also the effect of facilitating the arrangement can be obtained because the disturbing padals can be removed.

  In the case of Example 1, as shown in FIGS. 1 and 2, both the cranks are configured to be detachable as the main members, and the concavo-convex structure corresponding to each fitting portion and the fitted portion is provided. However, even if only one crank is detachable, an anti-theft effect can be obtained.

The uneven structure used in the present invention will be described in detail below.
In the case of Example 1, the concavo-convex structures K11 and K12 are formed on the end face of the rotating cylinder 1, and the concavo-convex structures K41 and K62 in which the concavo-convex corresponding to the concavo-convex structures K11 and K12 are formed are formed on the side surface of the crank. Is.
In the present invention, the corresponding concavo-convex structure means that one member has a convex structure and the other member has a concave structure. A structure that is joined in a state that does not slip.
As an example of such a concavo-convex structure, as shown in FIG. 2, for example, two concave structures are formed on one member, and the shape, size, and position of the other member are fitted to the two concave structures. A convex structure was formed. Of course, the unevenness may be reversed.
Such concavo-convex structures cannot be fitted to each other if they are different in any one of shape, size, and position, so a huge variety of combinations are possible, and all concavo-convex structures of bicycles to be manufactured and sold can be obtained. Therefore, it is possible to form substantially different concavo-convex structures, and it is possible to constitute incompatible main members. Therefore, the concavo-convex structure is incompatible and has a relationship between a lock and a key which are a single combination with each other, and an anti-theft effect can be obtained.

Note that if you forget to remove and carry the crank as the main member, there is a risk that it will be removed and carried away by someone else. Moreover, as shown in the figure, it is preferable to provide a theft prevention structure 9 such as a conventional cylinder lock.

In addition, as shown in FIG. 4, the frame F is configured by using two special panels as shown in FIG. 4, and the front and rear wheels, the handle post, and the seat post are folded as shown by arrows. You may comprise so that a main part can be stored in a flame | frame.
The handle in the case of Example 2 is stored in the frame with the screw loosened and the handle bar slid to one of the left and right with respect to the handle post and then rotated so that the handle bar and the handle post are substantially parallel. To do.
In order to reduce the weight, the panel-like frame may be provided with a number of punched portions as long as the strength is not impaired. In addition, when the punching part punches and processes the owner's name and initial characters, the satisfaction of the owner is increased, and the number of people who steal bicycles whose names are overheated is reduced. .
In the case of the folding bicycle configured as described above, even if the wheel, the handle, and the seat are stored in the frame, the pedal 5 and the crank 4 protrude from the frame F and become an obstacle. By removing the crank, the main part of the bicycle is stored in the frame and can be stored in a small storage space. Therefore, multiple units can be stored in the trunk of a car or in the car. It becomes like this.
Also, in the case of a special bicycle as shown in FIG. 3, even if it is not stored in the trunk of the car or in the car, it can easily be stolen if left on the road in front of the station, etc. If it is fixed to the building and the crank is removed, the risk of being stolen is reduced.

In the third embodiment, a pedal may be used as a main member instead of the crank.
In this case, since the main member to carry is smaller than the case of a crank, it is easy to carry. In this case as well, a certain degree of theft prevention effect can be obtained even if one pedal is configured to be detachable instead of both pedals.

  As Example 4, the main member may be a seat post or a handle post, and a concavo-convex structure corresponding to the mounting portion thereof may be formed.

Further, the positions where the fitting portion and the fitted portion are provided are not limited to the side surface on the main body side and the side surface on the main member side, and are detachable, and force is transmitted when they are fitted. It can be anywhere. For example, as a structure in which one member is covered with the other, an uneven structure may be provided on the inner surface of the one member, and an uneven structure corresponding to the other week surface may be provided.

BB Bicycle bottom bracket part 1 Rotating cylinder 11, 12 Fitting part 4, 6 Main member, Crank 41, 62 Fitted part KK11, K12 Uneven structure 2 Sprocket wheel 4 Rotating cylinder K42, K62 Uneven structure 5, 7 Pedal 8 Retaining structure

Claims (3)

The fitting portion formed on the main body of the bicycle and the fitted portion formed on the main member can be brought into contact with each other and fitted, and the fitting portion and the fitted portion are separated from each other. Configured to be able to leave
The fitting portion of the main body and the fitted portion of the main member have a concavo-convex structure corresponding to each other,
The uneven structure is an individual structure for each individual bicycle,
A structure for attaching and detaching a main member of a bicycle, characterized in that the main member of a different individual does not correspond to the fitted portion of the main member and cannot be fitted to prevent theft. The main member is a crank;
The fitting portion on the main body side is located on the side surface of the sprocket shaft,
2. The bicycle main member attaching / detaching structure according to claim 1, wherein the fitted portion on the main member side is located on a side surface of the shaft of the crank. The main member is a pedal,
The fitting portion on the main body side is located on the side surface of the end portion of the crank,
2. The bicycle main member attaching / detaching structure according to claim 1, wherein the fitted portion on the main member side is located on a side surface of the shaft of the pedal.

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