JP3371717B2 - Chain case mounting device for bicycles and bicycles - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a chain case attachment device for a bicycle or the like, which covers a gear and a chain for transmitting a pedaling force to a rear wheel, and a bicycle .

[0002]

2. Description of the Related Art A conventional bicycle chain case mounting device will be described with reference to FIG. 1 is the body of the bicycle, frame 2
Consists of. Reference numeral 3 denotes a chain case formed of synthetic resin. Upper and lower claws 4 and 5 at the front end are fixed to the arms 6a and 6a of a fixture 6 fixed to the vehicle body 1 by tightening screws 7 and 8 and rear end portions. Also fixed to the frame 2 with screws 9.

[0003]

However, in the above-mentioned conventional structure, in order to attach the chain case 3 to the frame 2, the arm 6a of the fixture 6 fixed to the frame 2 in advance,
Since the claws 4 and 5 are fastened to the 6a with the two screws 7 and 8 and the rear end is fastened with the screw 9 to the vehicle body, respectively.
The cost is high, requiring three screws, and it is troublesome to assemble with the tightening work.

SUMMARY OF THE INVENTION The present invention has been made to solve such a conventional problem, and an object of the present invention is to provide a chain case attachment device for a bicycle or the like, which uses less screws and does not require much labor for assembly. .

[0005]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention makes it possible to attach / detach projections formed above and below a front end of a chain case to an engaging member fixed to a vehicle body in a concavo-convex relationship. Only the rear end of the chain case is engaged and attached to the vehicle body with a fixture. Since the front end portion side of the chain case is engaged with the locking member in a concave-convex manner, it is possible to eliminate the conventional mounting labor with two screws and to assemble at low cost.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS To solve the above problems, the present invention provides a locking device which is fixed to a vehicle body and has recesses formed in the upper and lower portions thereof.
A chain case is provided in which a protrusion formed above and below a front end is detachably engaged with a recess of the locking tool, and a mounting portion formed at the rear end is fixed to the vehicle body with a fixing tool. is there. In this way, since the front end side of the chain case is engaged with the locking tool by the concave and convex portions, the specific fasteners such as screws can be reduced and the assembly can be done simply by hooking. it can.

Further, according to the present invention, the upper and lower recesses are formed, and the upper and lower portions have a contact portion for abutting against the vehicle body to regulate the mounting device and fixed to the vehicle body. And a chain case in which a mounting portion formed at a rear end portion is fixed to the vehicle body so as to be movable in the front-rear direction.

In this way, the front end side of the chain case is engaged with the locking member by the concave and convex portions, and the abutting portion of the locking member is brought into contact with the vehicle body. Not only can the number of tools be reduced and the assembly can be simplified by hooking, but the chain case can be easily attached to a predetermined position by restricting the position of the locking tool by the abutting portion.

Further, the chain case is provided with a mounting portion provided at the rear end thereof so as to be movable in the front-rear direction so as to be adjustable with respect to the mounting position on the front end side of the chain case. Can be securely fixed.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. Numeral 10 is the body of the bicycle, and the processed frame 1
It consists of 1. A pedal shaft 12 is rotatably supported on the frame 11, and has a gear 13 fixed thereto. 14 is a gear 13
And a chain (not shown) installed on the rear wheel side, and a chain case 15 made of synthetic resin that covers the chain 14 and the gear 13, and is fixed to the frame 11 of the vehicle body 10 by the mounting device of the present invention. ing. Explaining this attachment device, the chain case 15 is integrally formed with claw-shaped projections 16 and 17 inward at the top and bottom of the front end in the longitudinal direction.
In addition, a long hole 18 is formed at the rear end as a movable mounting portion that can move the chain case in the front-rear direction and adjust the mounting position. 19 is a recessed part 20 and 2
1. A metal plate locking tool integrally formed with an abutting portion 22 in the middle between the upper and lower sides. The central hole 23 is passed through the pedal shaft 12 and fixed to the frame 11. The recesses 20 and 21 are formed by bending the upper and lower ends of the locking tool 19 in the front direction of the vehicle body 1 to form recesses that are open in the upper and lower surfaces and in the front direction.
The size is set such that the metal plate 7 is clamped by the repulsive force of the metal plate so that it does not rattle when it is engaged. Further, the abutting portion 22 abuts the frame 11 to regulate the attachment position of the locking tool 19. Reference numeral 24 denotes a screw as a fixture that is screwed into a long hole 18 as a mounting portion provided at the rear end of the chain case 15 to fix the rear end of the chain case 15 to the frame 11. Reference numeral 25 is a large hole for allowing the pedal shaft 12 of the chain case 15 to escape.

In the above embodiment, the locking member 19 has a hole 23 formed in the pedal shaft 12 and the abutting portion 22 is abutted against the frame 11 from above to determine the mounting position, and finally the fixing means (not shown). It is fixed to the frame 11 with. Then, while moving the chain case 15 from the front side to the rear side of the vehicle body 1, the pedal shaft 12 is allowed to escape through the hole 25 in the recesses 20 and 21 of the locking tool 19, and the projection 16 of the chain case 15 is provided.
17 is engaged and fixed. Finally, the screw 24 is passed through the long hole 18 of the chain case 15 and screwed into the frame 11 to fix the rear end of the chain case 15. At this time, a slight adjustment of the mounting position of the chain case 15 in the longitudinal direction is required for the long hole 18
In this range, the chain case 15 is moved back and forth.

Incidentally, the projections 16 and 17 in the above embodiment
Is provided in the chain case 15, and the recesses 20 and 21 are provided in the locking tool 19, respectively.
7 and the recesses 20 and 21 may of course be provided, and the recesses 20 and 21 and the protrusions 16 and 17 may be of any shape as long as the engagement relationship of the unevenness of the present invention is maintained. It is not limited to the illustrated range. Further, the present invention is applicable not only to mounting a bicycle chain case, but also to a motorcycle, a motorcycle, and the like.

[0013]

As described above, according to the present invention, the front end side of the chain case is detachably locked to the vehicle body by the engagement of the recess and the projection, and the rear end portion of the chain case is fixed to the vehicle body by the fixing tool. Since it is fixed, compared to the conventional installation using only screws, it is possible to reduce the installation labor, improve productivity, and reduce the use of screws, thus making it inexpensive.

Further, according to the present invention, not only is the front end side of the chain case detachably locked to the vehicle body by the engagement of the concave portion and the projecting portion, but also the mounting position is regulated by the abutting portion that contacts the vehicle body. , The chain case mounting position can be made precise and the chain case rear end mounting part is configured so that the chain case can be moved in the front-rear direction. Adjustable to and can be installed accurately.

[Brief description of drawings]

FIG. 1 is a side view of a main part of an embodiment of a chain case attachment device for a bicycle or the like according to the present invention.

FIG. 2 is an enlarged side view of a front end portion side of a chain case in the chain case attaching device.

FIG. 3 is an exploded perspective view of FIG.

FIG. 4 is a side view of a conventional bicycle chain case attachment device.

[Explanation of symbols]

10 car body 15 Chain case 16,17 Projection 18 Mounting part 19 Locking tool 20, 21 recess 22 Contact part 24 Fixture

─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-10-67364 (JP, A) Actual development Sho 63-141089 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB name) B62J 13/02

Claims (5)

(57) [Claims] 1. A vehicle is formed with protrusions above and below a front end.
There is a mounting part on the rear end that is fixed to the body with a fixing tool.
Which is fixed to the car body and the upper and lower protrusions, respectively
A chain case attachment device for a bicycle or the like , comprising: a locking tool formed by bending the upper and lower ends . 2. The locking member is formed between a recess and a recess formed in a vertical direction so that a contact portion that contacts the vehicle body and restricts a mounting position of the locking tool to the vehicle body is formed. The chain case attachment device for a bicycle or the like described in 1. 3. The chain case mounting device for a bicycle or the like according to claim 1, wherein the mounting portion is a long hole that is long in the longitudinal direction of the chain case and adjusts the mounting position of the chain case on the vehicle body. 4. A bicycle equipped with the chain case mounting device according to claim 1. 5. The locking tool is fixed to the frame with the hole formed in the center of the locking tool being passed through the pedal shaft and the contact portion being in contact with the frame of the bicycle. The bicycle according to claim 4, wherein the bicycle is a bicycle.