JP2563661Y2 - Bicycle safety cover - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bicycle safety cover which covers a laterally outer side of a crank gear and is attached to a bicycle so as to be rotatable integrally with the crank gear.

[0002]

2. Description of the Related Art Conventionally, as shown in FIGS. 9 and 10, the safety cover has a crankshaft through-hole in the center of a cover 3, and the whole cover is a crank gear 1 rather than a crank 2.
There was one that was configured to be installed in such a way as to be located toward the side.

[0003]

Conventionally, when the entire crank is exposed to the outside of the cover and the foot operated by the pedal moves inward, the crank may hit the base end side of the crank.
An object of the present invention is to provide a safety cover which not only covers a crank gear but also has a cover function for a crank, and which can be easily and firmly attached to a crank gear. .

[0004]

SUMMARY OF THE INVENTION In order to achieve the object, a bicycle safety cover according to the present invention is characterized in that, in order to achieve the object, a center covering the laterally outer side of a base end for connecting a crankshaft to a crankshaft. A cover portion, comprising a peripheral cover portion connected to the central cover portion and covering the lateral outside of the crank gear, a crank through hole portion through which the crank is inserted,
The distal end side of the crank mounted on the bicycle is formed on the peripheral cover portion so as to protrude laterally outward of the vehicle body from the crank through hole. In addition, a mounting screw hole is provided in one of the center cover portion and the peripheral cover portion and through which a mounting screw for mounting one of the central cover portion and the peripheral cover portion to the crank gear is inserted. And a projection extending in the direction of the crank gear, and at least one attachment projection extending parallel to a surface of the crank gear and having a flange portion engaged with a through hole provided in the crank gear. The operation and effect are as follows.

[0005]

In order to enable the pedal to be operated laterally outside the safety cover and to be able to rotate integrally with the crank gear of the safety cover, the tip end of the crank projects out of the cover through the crank through hole. However, the crank gear can be positioned inside the peripheral cover and covered, and the base end of the crank can be positioned inside the central cover and covered so as not to be exposed outside the cover. Moreover, as the crank projects from the surrounding cover,
The entire cover is located as far inside as possible with respect to the tip end of the crank, and a relatively large space between the cover and the pedal can be secured so that even if the foot moves inward, it hardly hits the cover. If the cover at the base end of the crank is made possible, it will be necessary to take an assembly procedure for mounting the safety cover after mounting the crank on the crankshaft. Can be mounted and set at a predetermined mounting position and mounting posture, and the safety cover can be mounted in the mounting procedure. When the safety cover is assembled, the crank through hole is closed by the penetrating crank so that the cover of the crank gear can be prevented. Furthermore, in order to attach the safety cover to the crank gear, with the above configuration, the flange of the attachment projection is inserted into the through-hole of the crank gear, and then engaged with the crank gear. By attaching a mounting screw to the crank gear and screwing the screw to the crank gear with the screw, easy and strong mounting to the crank gear can be performed.

[0006]

[Effects of the Invention] It is possible to cover not only the crank gear but also the base end of the crank so that the pedal can be operated safely, and the pedal can be easily moved by moving the foot inward as much as possible.
In addition, a safety cover that can be easily and firmly attached to the crank gear can be provided.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A crank gear 1, a crank 2 and a safety cover 3 shown in FIG. 2 constitute a part of a bicycle driving device as shown in FIGS. 1 and 6, and the crank gear 1 is shown in FIG. As shown in FIG. 5, the boss 1a is fitted to the crankshaft 5 supported by the bottom bracket 4 of the vehicle body frame. At the base end 2a of the crank 2, it is formed so as to be fitted to the end of the crankshaft 5 and to be integrally rotatable due to the non-circular shape of the end of the crankshaft. 6 is provided with a connecting boss 2d which is configured to be externally stopped, and a distal end portion 2b is provided with a pedal mounting hole 9 configured to screw a pedal support shaft 8. That is, the crank 2 is configured to be integrally rotatably connected to the crankshaft 5 by the base end 2a, and to be able to be driven by attaching the pedal 10 to the front end 2b. When the crank 2 is attached to the crankshaft 5, the transmission projection 11 provided on the inner surface side of the base end 2 a enters the projection through hole 12 of the crank gear 1 as shown in FIG. The combination allows the crank 2 to be driven to rotate by the crank 2. The safety cover 3 is formed of a disc-shaped body having an outer diameter larger than the outer diameter of the crank gear 1, so that the central cover 3a acting on the base end 2a of the crank 2 and being connected to the central cover 3a. And a peripheral cover 3b acting on the crank gear 1. 2 to 4 for assembling the safety cover 3 with the crank gear 1 and the crank 2 so as to be able to rotate integrally with the crank gear 1 and the crank 2, one mounting screw hole 1.
4, two mounting projections 19, 19 are provided on the peripheral cover portion 3b, and the safety cover 3 is attached to cover the lateral outer sides of the base end portion 2a of the crank gear 1 and the crank 2, so that feet and clothes can be removed. Crank gear 1 and crank base end 2a
It is configured so as to avoid contact with. That is, the safety cover 3 attaches the crank 1 to the crankshaft 5 and attaches the pedal 10 to the crankshaft 5, and uses the crank through hole 13 as an assembly crank passage as shown by a virtual line in FIG. By adopting an assembling method in which the distal end side of the crank 2 is fitted from the distal end side to the proximal end side along the crank 1, the distal end side of the crank 2 protrudes outward from the cover through the crank through hole 13 as shown by a solid line in FIG.
Further, it is configured to be mounted in a predetermined mounting posture where the spherical side surface 3c is on the outside. Mounting projection 19
Of the crank gear 1 is the through hole 1b of the crank gear 1
At the small diameter portion of the projection through hole 1b, a flange portion provided at the tip of the mounting projection 19 and extending parallel to the surface of the crank gear 1 is engaged with the crank gear 1 as shown in FIG. By attaching a mounting screw 15 inserted through the mounting screw hole 14 to the crank gear 1, the safety cover 3 is configured to be assembled to the crank gear 1 so as to be integrally rotatable. In this assembled state, the central cover portion 3a covers the lateral outer side of the crank base end portion 2a, and the peripheral cover portion 3b covers the lateral outer side of the crank gear 1. When the crank 2 projects from the surrounding cover portion 3b, the safety cover 3 is positioned as far away from the pedal 10 as possible.

The safety cover according to the present invention is mounted on a bicycle provided with a half chain case 17 or a total chain case 18 as shown in FIG. 7 or FIG. It can be applied to the case.

In the claims of the utility model registration, reference numerals are written for convenience of comparison with the drawings, but the present invention is not limited to the configuration of the attached drawings by the entry.

[Brief description of the drawings]

FIG. 1 is a sectional view of a bicycle driving device.

FIG. 2 is a perspective view of a safety cover, a crank, and a crank gear.

FIG. 3 is a sectional view of a safety cover.

FIG. 4 is a rear view of the safety cover.

FIG. 5 is a cross-sectional view showing a state in which a mounting protrusion is in operation.

FIG. 6 is a side view of the bicycle driving device.

FIG. 7 is a side view of another embodiment of the bicycle drive device.

FIG. 8 is a side view of another embodiment of the bicycle drive device.

FIG. 9 is a sectional view of a conventional safety cover.

FIG. 10 is a front view of a conventional safety cover.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Crank gear 2 Crank 2a Base end 3a Center cover 3b Peripheral cover 13 Crank through hole

Claims (2)

(57) [Scope of request for utility model registration] 1. A crank gear (1) covering a laterally outer side,
And a bicycle safety cover mounted on a bicycle so as to be rotatable integrally with the crank gear (1), wherein the center covers a laterally outer side of a crank shaft connecting base end (2a) of the crank (2). A cover portion (3a), and a peripheral cover portion (3b) connected to the central cover portion (3a) and covering a laterally outer side of the crank gear (1), and a crank penetration through which the crank (2) is inserted. Hole (1
3) is provided in the peripheral cover part (3b) in a state where the tip end side of the crank (2) mounted on a bicycle projects from the crank through hole part (13) to the lateral outside of the vehicle body, The central cover part (3a) and the peripheral cover part (3b)
And the center cover (3a) and the front
Any one of the peripheral cover portions (3b)
Mounting screw (15) for mounting to (1)
A projection having an attachment screw hole (14) extending therethrough and extending in the direction of the crank gear (1);
It extends parallel to the surface, provided in the crank gear (1)
A bicycle safety cover comprising at least one mounting projection (19) having a flange engaged with the through hole (1b) . 2. The bicycle safety cover according to claim 1, wherein the central cover part (3a) and the peripheral cover part (3b) are formed integrally.