JP3231794U - Chain cover - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a chain cover capable of ensuring safety while giving a light impression to an appearance. SOLUTION: A chain cover 1 for covering a bicycle chain includes a cover main body A and a protective plate B, and the cover main body A has a cover main body main portion A1 provided so as to face the chain. The main body portion A1 of the cover has a window portion A11 which is a through hole, and the protective plate B is configured to be transparent or translucent, and is provided so as to completely or partially cover the window portion A11. [Selection diagram] Fig. 1

Description

The present invention relates to a chain cover attached to a bicycle.

Conventionally, especially light vehicles and bicycles for children are usually provided with a chain cover for covering the chain for the purpose of protecting the chain from the outside.

As an invention relating to such a chain cover, for example, Patent Document 1 describes an invention relating to a chain cover for facilitating a chain hooking operation and improving workability at the time of assembly or repair of a chain detachment.

Japanese Unexamined Patent Publication No. 2001-1972

By the way, such a chain cover is usually provided with an elongated window portion along the extending direction of the chain stay in order to reduce the weight.
However, in this case, clothes or the like may be unexpectedly caught in the chain through the long hole window, or a child may be injured by inserting his or her finger into the long hole, which may lead to an accident.

Further, in order to prevent the above-mentioned accidents, if the configuration is not provided with a window, not only the weight of the chain cover itself increases, but also the appearance is given a heavy impression, which is not particularly suitable for children's bicycles. There was a problem.

The present invention has been made in view of the above-mentioned actual conditions, and an object of the present invention is to provide a chain cover capable of ensuring safety while giving a light impression to the appearance.

The present invention that solves the above problems is a chain cover that covers a bicycle chain.
With a cover body and a protective plate,
The cover main body has a cover main body main portion provided so as to face the chain.
The main body of the cover has a window portion which is a through hole, and has a window portion.
The protective plate is configured to be transparent or translucent.

According to the present invention, the transparent or translucent protective plate that closes the window can prevent accidents such as chain entanglement through the window while maintaining a light impression of the appearance of the window. Become.

In a preferred embodiment of the present invention, the protective plate is provided by closing the window portion.

With such a configuration, there is no room for a finger or the like to be inserted through the window portion, and the safety is further improved.

In a preferred embodiment of the present invention, the protective plate is provided on the back surface side of the main body of the cover.

With such a configuration, when attached to a bicycle, the peripheral edge of the protective plate becomes invisible from the outside, and the chain cover can have a cleaner appearance.

In the preferred embodiment of the present invention, the outer shape of the window portion is formed along the outer shape of the main body portion of the cover.

With such a configuration, the appearance of the chain cover can be made to have a unified and more aesthetic appearance.

In a preferred embodiment of the present invention, the main body of the cover has a decorative portion on the surface side thereof, and the decorative portion is provided along the peripheral edge of the window portion.

With such a configuration, the aesthetic appearance of the chain cover can be further improved.

In a preferred embodiment of the present invention, the protective plate has a protrusion arranged on the peripheral edge of the window portion, and the protective plate has a penetration hole through which the protrusion penetrates.

With such a configuration, the protective plate can be firmly attached to the main body of the cover with a simple configuration without the need for an adhesive or the like.

In a preferred embodiment of the present invention, the protective plate is made of an acrylic material.

With such a configuration, the chain cover can be made lighter and cheaper to manufacture.

According to the present invention, it is possible to provide a chain cover capable of ensuring safety while giving a light impression to the appearance.

It is the schematic perspective view of the chain cover which concerns on embodiment of this invention. It is a figure which shows the chain cover which concerns on embodiment of this invention, is (a) back view, (b) PP'line end view, (c) QQ'line end view. It is a front view which shows the use state of the chain cover which concerns on embodiment of this invention.

Hereinafter, the chain cover according to the embodiment of the present invention will be described with reference to the drawings.
The embodiments shown below are examples of the present invention, and the present invention is not limited to the following embodiments. Further, in these figures, reference numeral 1 indicates a chain cover according to the present embodiment.

As shown in FIG. 1, the chain cover 1 according to the present embodiment includes a cover main body A and a protective plate B.

The cover body A is substantially flat toward the bicycle X (see FIG. 3) from the peripheral edges of the substantially flat plate-shaped cover body main part A1 and the cover body main part A1 provided facing the chain (not shown). It has a vertically extended flange portion A2.

The main body A1 of the cover is mainly connected to the chain ring (not shown), the first component S1 covering the chain extending from the chain ring to the sprocket (not shown), and the first structure S1. It is composed of a hub shaft X1 (see FIG. 3) and a second component S2 that covers a sprocket (not shown).
Further, a hub shaft insertion hole h through which the hub shaft X1 is inserted is provided at the boundary portion between the first structure S1 and the second structure S2.

The first component S1 in the cover main body A1 includes a window portion A11 which is a through hole, a decorative portion A12 arranged along the peripheral edge of the window portion A11, and a protruding portion arranged on the peripheral edge of the window portion A11. A13 (see FIG. 2), a crank insertion hole A14 through which the bicycle X crank X2 (see FIG. 3) is inserted, and a mounting screw s (see FIG. 3) for attaching the cover body A to the frame end X3 (see FIG. 3). (See) is provided with a screw hole A15 through which the hole is inserted.

The outer shape of the window portion A11 is formed along the outer shape of the cover main body main portion A1.
More specifically, the rear side end of the window portion A11 has a rounded shape like the end of the second component S2, and the window portion A11 expands in a V shape as it goes toward the front side. It is shaped like this. Further, the front end is curved in the same direction as the rear end to match the shape of the crank insertion hole A14.

The decorative portion A12 is provided on the surface side of the main body portion A1 of the cover along the outer shape extending in a V shape of the window portion A11.
In the present embodiment, the decorative portion A12 is a plurality of glossy beads. Further, on the surface side of the main body portion A1 of the cover, as the decorative portion A12, an arbitrary illustration may be provided on the peripheral edge of the crank insertion hole A14, the peripheral edge of the front side end portion or the rear side end portion of the window portion A11, and the like. good.

The protective plate B is transparently made of an acrylic material, and is provided on the back surface side of the main body A1 of the cover by closing the window A11.
Further, the protective plate B has a penetration hole B1 (see FIG. 2) through which the protrusion A13 penetrates.

The protective plate B does not necessarily have to be provided by closing the window portion A11. For example, the protective plate B is provided in the cover main body main portion A1 in a star-shaped or heart-shaped shape to provide a portion. The configuration may be such that a gap is formed.
Further, the protective plate B does not necessarily have to be entirely transparent, for example, the surface is colored in an arbitrary color so as to be translucent, the surface is given an arbitrary design, and the protective plate B is partially transparent. It may be configured as such.

As shown in FIGS. 2A and 2B, a connecting plate A21 is provided on the flange portion A2 on the side of the second configuration S2 along the inner peripheral surface of the flange portion A2.

The connecting plate A21 is formed in a substantially U-shape along the outer shape of the second component S2 in the back view and a substantially L shape in the cross-sectional view.
As a result, even if the user grasps the flange portion A2 on the second component S2 side when removing the chain cover 1 attached to the bicycle X, the user's hand easily comes into contact with the chain. It is possible to suppress the situation where it ends up.

Further, the connecting plate A21 is configured so that both ends of the connecting plate A21 project toward the first component S1 so that the connecting plate A21 can come into contact with the inner peripheral surface of the flange portion A2 on the first component S1 side.

The first component S1 is connected to the second component S2 by connecting both ends of the flange portion A2 and the connecting plate A21 in contact with the inner peripheral surface of the flange portion A2 with a pair of connecting screws t. Has been done.
The flange portion A2 and the connecting plate A21 on the first component S1 side are provided with holes through which the pair of connecting screws t are inserted, but the illustration thereof will be omitted.

In addition, a substantially L-shaped support member l is provided on the back surface side of the first component S1, and one end of the support member l projects to the back surface of the second component S2.
By doing so, it is possible to prevent the second component S2 from rotating about the pair of connecting screws t, and a stable connected state between the first component S1 and the second component S2 is maintained. To.
The support member l is provided with a female screw portion l1 that communicates with the screw hole A15.

As shown in FIGS. 2 (a) and 2 (c), four protrusions A13 are provided on the peripheral edge of the window portion A11, and the tongue piece extending inward of the window portion A11 is provided with its end portion on the outside. It is formed by bending it in a substantially L shape so as to face.
Further, the penetration hole B1 is a small hole provided corresponding to the number and position of the protrusions A13.

By configuring the protrusion A13 and the penetration hole B1 in this way, the protective plate B is fixed to the cover main body A1 in such a manner that it is sandwiched between the protrusion A13 and the back surface of the cover main body main A1.

FIG. 3 is a front view when the chain cover 1 is attached to the conventional bicycle X.
When the user attaches the chain cover 1 to the bicycle X, the user inserts the crank X2 into the crank insertion hole A14 in the same manner as the conventional chain cover.
Further, the user disassembles the first component S1 and the second component S2, arranges them inside the frame end X3 provided with the hub shaft X1, and then connects them with the connecting screw t. As a result, the hub shaft X1 is inserted into the hub shaft insertion hole h.
Further, the user screwes the mounting screw s into the female screw portion l1 through a screw hole (not shown) and a screw hole A15 provided in the frame end X3.
Since the chain cover 1 is attached as described above, when the bicycle X has a chain stay, the chain stay is cut off in advance.

According to the present embodiment, the transparent protective plate B that closes the window portion A11 can prevent accidents such as chain entrainment through the window portion A11 while maintaining a light impression of the appearance of the window portion A11. It will be possible.

Further, since the protective plate B is provided so as to close the window portion A11, there is no room for a finger or the like to be inserted through the window portion A11, and the safety is further improved.

In addition, since the protective plate B is provided on the back surface side of the main body A1 of the cover, the peripheral edge of the protective plate B cannot be seen from the outside when attached to the bicycle, and the chain cover 1 has a cleaner appearance. Can be.

Further, since the outer shape of the window portion A11 is formed along the outer shape of the cover main body main portion A1, the appearance of the chain cover 1 can be made a unified and more aesthetically pleasing appearance. ..

Further, the cover main body main portion A1 has a decorative portion A12 on the surface side thereof, and the decorative portion A12 is provided along the peripheral edge of the window portion A11, thereby further improving the aesthetic appearance of the chain cover 1. Can be done.

Further, the protrusion A13 of the cover main body A1 and the penetration hole B1 of the protective plate B make it possible to firmly attach the protective plate B to the cover main body A1 with a simple structure without requiring an adhesive or the like. Can be installed.

Further, since the protective plate B is made of the acrylic material, the chain cover 1 can be made lighter and can be manufactured at low cost.

The shapes, dimensions, and the like of each component shown in the above-described embodiment are examples, and can be variously changed based on design requirements and the like.

1 Chain cover A Cover body A1 Cover body Main part A11 Window part A12 Decorative part A13 Projection part A14 Crank insertion hole A15 Screw hole S1 First component S2 Second component A2 Flange part A21 Connecting plate h Hub shaft insertion hole B Protective plate B1 Penetration hole X Bicycle X1 Hub shaft X2 Crank X3 Frame end

Claims (7)

A chain cover that covers the bicycle chain
With a cover body and a protective plate,
The cover main body has a cover main body main portion provided so as to face the chain.
The main body of the cover has a window portion which is a through hole, and has a window portion.
The protective plate is a chain cover that is transparent or translucent. The chain cover according to claim 1, wherein the protective plate is provided by closing the window portion. The chain cover according to claim 1 or 2, wherein the protective plate is attached to the back surface side of the main body of the cover. The chain cover according to any one of claims 1 to 3, wherein the outer shape of the window portion is formed along the outer shape of the main body portion of the cover. The main body of the cover has a decorative portion on the surface side thereof, and has a decorative portion.
The chain cover according to any one of claims 1 to 4, wherein the decorative portion is provided along the peripheral edge of the window portion. The main body of the cover has a protrusion arranged on the peripheral edge of the window.
The chain cover according to any one of claims 1 to 5, wherein the protective plate has a penetration hole through which the protrusion penetrates. The chain cover according to any one of claims 1 to 6, wherein the protective plate is made of an acrylic material.

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