JP3002372U - Structure for tightening and fixing pipes in bicycles - Google Patents

Abstract

(57) [Summary] [Purpose] When a pipe such as a handlebar is pressed and fixed in a holding state, the pipe is not scratched and its strength is prevented from decreasing. [Structure] An outer pipe is provided by being inserted into an inner pipe such as a handlebar, and a slit (21) forming portion formed in the outer pipe is tightened with a tightening bolt (3), so that the inner pipe is not covered by the inner pipe. In the structure for tightening and fixing the pipe in a bicycle that compresses the pipe, an elastic block (5) such as rubber that is tightly inserted into the slit (21) is provided and the outside of the inner pipe inserted into the outer pipe is provided. The elastic block (5) was brought into contact with the wall.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a pipe tightening / fixing structure that is applied when fixing an additional grip to both ends of a handlebar or fixing a handlebar to a handlebar stem. It is intended to prevent the pipe from being damaged when fixed, and to prevent the strength from being lowered.

[0002]

[Prior art and problems]

 Recently, as shown in Fig. 5, a bicycle that allows the driver's posture to be changed by selectively gripping the grip end of the handlebar (1) and the additional grips (2) (2) attached to that part. Has become popular. In the conventional additional grip (2) shown in FIG. 6, a mounting pipe (26) fitted to the handlebar (1) is provided at the base end of the additional grip (2). A slit (21) running in the axial direction is cut out on the side wall of (). In addition, a pair of protrusions (23) and (24) facing each other across the slit (21) are arranged in the attachment pipe (26).

In this structure, the mounting pipe (26) is externally fitted to the tip of the handlebar (1), and in this state, the projecting bodies (23) and (24) facing each other with the slit (21) interposed therebetween are tightened by tightening bolts. When tightened with (3), the diameter of the mounting pipe (26) contracts due to the action of the slit (21), and the handlebar (1) inside is compressed, which causes the additional grip (2) to handlebar. It is mounted and fixed to (1).

However, the above-mentioned conventional device has a problem that when the handlebar (1) is pressed, a part of the side wall thereof is locally deformed and is easily damaged. The above problems will be described in more detail. The mounting pipe (26) at the time of mounting does not contract uniformly in the radial direction over the entire area in the inner circumferential direction, but the mounting pipe (26) is tightened in the tightening direction of the tightening bolt (3). It deforms in a flattened manner.

Then, the handlebar (1) inserted into the mounting pipe (26) is also flattened in the tightening direction of the tightening bolt (3), and the handlebar located inside the mounting pipe (26) is flattened. When the outer peripheral wall portion of the bar (1) is viewed in detail, the outer peripheral wall of the handle bar (1) is deformed so as to locally protrude from the slit (21) to the outside. That is, as shown in FIG. 6, a part of the side wall of the handlebar (1) is pinched by the slit (21) of the mounting pipe (26) so as to be permanently deformed to cause a linear bump, which causes damage. To receive.

In the above description, the case where the handlebar (1) and the additional grip (2) are fixed has been described, but the handlebar (1) is connected to the upper end of the hawk stem protruding upward from the head pipe (4). The same problem occurs when the handlebar (1) is pressed and fixed with the horizontal tube (40) for the handle stem, or when the seat post is pressed and fixed with the standpipe of the body frame.

The present invention has been made in view of the above-mentioned points, and is an “outer pipe that is externally inserted in an inner pipe such as a handlebar and is attached to an additional grip or the like, and an outer pipe formed in the outer pipe. It is composed of a tightening bolt (3) that tightens the formed part of the slit (21), and by tightening the tightening bolt (3), the inner pipe is pressed by the outer pipe. The problem is to prevent the inconvenience that the inner pipe such as the handlebar is damaged when the inner pipe such as the handlebar is pressed.

[0008]

[Technical means]

 The technical means of the present invention for solving the above-mentioned problem is to provide an elastic block (5) made of rubber or the like that is tightly inserted in the slit (21) and to the outer peripheral surface of the inner pipe inserted into the outer pipe. The elastic block (5) is brought into contact. '

[0009]

[Action]

 The above technical means act as follows. When the slit (21) is contracted by tightening the tightening bolt (3), the elastic block (5) loaded in the slit (21) is compressed and flattened, and thereby the elastic block (5) is compressed. When looking at the thick-walled portion at the peripheral edge, the thick-walled portion is crushed and deformed in the direction of protruding to the outside. Then, the peripheral portion of the elastic block (5) that abuts the inner pipe of the handlebar (1) or the like is deformed so as to be pushed out toward the pipe side, whereby the elastic block (5) is Press the outer wall of the inner pipe. Then, the pressing makes it difficult for the inner pipe to penetrate into the slit (21), which prevents the outer wall of the inner pipe from being locally deformed by being pinched by the slit (21). .

[0010]

【effect】

 The present invention has the following unique effects. Since the outer wall of the inner pipe is not pinched by the slit (21) and is not locally deformed, it is possible to prevent the inner pipe from being damaged.

[0011]

【Example】

 Next, the embodiment of the present invention described above will be described in detail with reference to the drawings. As shown in FIG. 1, the attachment pipe (26) (corresponding to the outer pipe described in the technical means section) disposed at the base end of the additional grip (2) is the same as the conventional one described above. Is provided with protrusions (23) and (24) facing each other across the slit (21), and one of the protrusions (23) has a through hole for inserting the tightening bolt (3). 230) has been drilled. The other projecting body (24) has a screw hole (240) facing the through hole (230), and the slit formed between the projecting bodies (23) and (24). (21) is formed in a tapered shape that expands toward the inside of the mounting pipe (26).

As shown in FIG. 2, the slit (21) is loaded with an elastic block (5) made of rubber or the like, and a bolt insertion hole (51) vertically penetrating is formed in the center thereof. Has been done. In addition, the cross-sectional shape of the elastic block (5) is formed in a taper shape that fits the slit (21), and the thickness of the elastic block (5) is the slit (21) before tightening. ), Or slightly larger than this. Further, as shown in FIG. 2, the end portion on the thick side of the elastic block (5) is shaped to match the side surface of the handle bar (1) (corresponding to the inner pipe described in the technical means section). Is formed on the curved surface of.

Next, the operation of fixing the additional grip (2) to the handlebar (1) will be described. First, attach the elastic block (5) to the slit (21) on the side of the additional grip (2). That is, while the elastic block (5) is positioned in the mounting pipe (26) of the additional grip (2), the thin side end is made to face the slit (21), and the slit (21) is made from the thin side end. Insert the elastic block (5) into. Then, the bolt insertion hole (51) of the elastic block (5) is aligned with the through hole (230) and the screw hole (240) formed in the protrusions (23) and (24). Next, through the through hole (230) of the protruding body (23) and the bolt insertion hole (51) of the elastic block (5) which are aligned with each other, into the screw hole (240) on the other protruding body (24) side. Loosen the tightening bolt (3). This completes the work of attaching the elastic block (5) to the additional grip (2). Next, when the attachment pipe (26) of the additional grip (2) is externally inserted from the end of the handlebar (1), the thick end surface (52) of the elastic block (5) is located on the side surface of the handlebar (1). Abut exactly on. Next, tighten the tightening bolts (3) so that the protrusions (23) and (24) approach each other, and the protrusions (23) are inclined so that the distance increases toward the handlebar (1) side. The opposing wall of (24) pushes the elastic block (5) toward the handlebar (1) side and flattens it. Then, the thick-side end surface (52) of the elastic block (5) is flattened upward and downward while approaching the handlebar (1) side, and the thickened portion is located on the handlebar (1) side. I try to stick out. That is, the outer surface of the handlebar (1) is pushed by the thick-side end surface (52) of the elastic block (5) so that the wall of the handlebar (1) locally enters the slit (21). Is blocked. This prevents the side wall of the handlebar (1) from being pinched by the slit (21) so that the handlebar (1) can be prevented from being injured. Although the elastic block (5) is formed to have a tapered cross section in the above embodiment, it may have a uniform thickness. This is because the elastic block (5) is vertically compressed and flattened, and the thick portion of the handle bar (1) side end portion pushes the wall surface of the handle bar (1) in an attempt to protrude to the handle bar (1) side.

In the second embodiment shown in FIG. 3 and FIG. 4, the body portion (53) of the elastic block (5) is formed to have a uniform thickness, and the upper and lower corners of the tip of the body (53) face forward. A front tongue portion (54) formed by the inclined tongue portions (59) (59) extending vertically and formed by the inclined tongue portions (59) (59) and the wall surface of the body (53) located between them. Has a curved shape that matches the outer surface of the handlebar (1). Further, a bolt insertion hole (51) is formed in the central portion of the body (53) of the elastic block (5) as in the first embodiment.

On the other hand, the slit (21) on the side of the additional grip (2) into which the elastic block (5) is loaded has a shape that fits the outer shape of the elastic block (5). That is, the opposing surfaces of the protrusions (23) and (24) forming the slits (21) are formed in a shape that matches the upper and lower wall surfaces of the elastic block (5). ), The end corners on the side of the mounting pipe (26) are chamfered in an arc shape to form guide surfaces (231) (241). The guide surfaces (231) (241) are formed in a shape corresponding to the outer surfaces of the inclined tongue pieces (59) (59) on the elastic block (5) side corresponding thereto.

In this case, as shown in FIG. 3, the elastic block (5) is inserted in the slit (21) of the additional grip (2), and the tightening bolt (3) is inserted in the same manner as in the first embodiment. When tightened, the inclined tongues (59) (59) formed at one end of the elastic block (5) are handled by the corresponding guide surfaces (231) (241) on the protruding body (23) (24) side. It is pushed to the side of the bar (1), so that the entire elastic block (5) is pushed to the side of the handlebar (1). Further, the elastic block (5) is made flat as a whole due to the contraction of the slit (21) accompanying the tightening of the tightening bolt (3). Then, the guide surfaces (231) and (241) press the elastic block (5) toward the handlebar (1) side, and the flattening of the elastic block (5) crushes the thick part of the peripheral edge. The outer wall of the handlebar (1) is pushed by the force when the tissue is deformed so as to protrude to the side of the handlebar (1), which causes the side wall of the handlebar (1) to be in the slit (21) part. It is possible to prevent the occurrence of scratches caused by being pinched with. In this case, a force that pushes the elastic block (5) from the outer peripheral surface of the handlebar (1) to the elastic block (5) acts, but the inclined tongue (59) corresponds to the mounting pipe (26). Since it is engaged with the corner portion of the, it is possible to reliably prevent the movement in the escape direction.

In the above embodiment, the case where the present invention is applied to the connecting portion of the handlebar (1) and the additional grip (2) has been illustrated, but the present invention is a hawk stem protruding upward from the head pipe (4). When the handlebar (1) inserted in the horizontal tube (40) for the handle stem (see Fig. 5) is attached by pressure to the handlebar (1), and the seat post is inserted in it by the standpipe of the body frame. It can also be used when compressing.

Further, urethane rubber, silicone rubber or the like can be used as a rubber which is a material of the elastic block (5), and other synthetic resin materials can also be used.

[Brief description of drawings]

FIG. 1 is a sectional view of a first embodiment.

FIG. 2 is a perspective view of an elastic block (5) used in the first embodiment.

FIG. 3 is a sectional view of a second embodiment.

FIG. 4 is a sectional view of an elastic block (5) used in the second embodiment.

FIG. 5 is a perspective view of an arrangement portion of an additional grip (2).

FIG. 6 is an explanatory diagram of a conventional example.

[Explanation of symbols]

 (1) ・ ・ ・ Handlebar (2) ・ ・ ・ Additional grip (21) ・ ・ ・ Slits (23) (24) ・ ・ ・ Flange

Claims (5)

[Scope of utility model registration request] 1. An outer pipe externally inserted into an inner pipe such as a handlebar and provided for attachment such as an additional grip,
It is composed of a tightening bolt (3) for tightening the formation part of the slit (21) formed on the outer pipe, and by tightening the tightening bolt (3), the outer pipe is pressed against the inner pipe to a bicycle. In the structure for tightening and fixing the pipe in the above, an elastic block (5) made of rubber or the like that is densely inserted into the slit (21) is provided, and the elastic block (5) is attached to the outer peripheral surface of the inner pipe inserted into the outer pipe. 5) A structure for tightening and fixing pipes in a bicycle that is in contact with. 2. The structure for tightening and fixing a pipe in a bicycle according to claim 1, wherein the interval between the constituent walls of the slit (21) is gradually increased toward the inner pipe. 3. The pipe for a bicycle according to claim 1, wherein the interval between the slit-constituting walls in the slit (21) extending from the open end on the inner pipe side to the inner pipe side is increased toward the inner pipe side. Tightening and fixing structure. 4. The structure for tightening and fixing a pipe in a bicycle according to claim 2, wherein the cross-sectional shape of the elastic block (5) in the thickness direction matches the cross-sectional shape of the slit (21). 5. The structure for tightening and fixing a pipe in a bicycle according to claim 3, wherein the elastic block (5) has a cross-sectional shape in the thickness direction that matches the cross-sectional shape of the slit (21).