JPH0314464Y2 - - Google Patents

Description

[Detailed explanation of the idea]

This invention relates to an improvement of a brake wire holder attached to a bicycle brake arm.

[Conventional technology]

In a side-pull type calibur brake for a bicycle, the brake wire receiver such as the outer receiver is conventionally connected to one brake arm 6A as shown in Figure 7.
(Y arm in the illustrated example, hereinafter referred to as Y arm)
A lock nut 7 is rotatably connected to a hole 61 provided at the right end of the lock nut 7.
A configuration is known that includes an adjustment screw, a so-called tube screw 8, which is inserted in the longitudinal direction through the tube screw 8 and screwed into the screw. That is, the outer wire W1 is connected to the upper large-diameter hollow part of the tube screw 8, and the inner wire W2, which is inserted through the outer wire W1, is inserted into the lower small-diameter hollow part. This pipe screw 8 is adjustably screwed into a through-hole 72 of the daruma 7 via a lock nut 71. Here, the daruma 7 is connected to the Y arm 6A in a state of projecting forward of the Y arm 6A in order to rotatably support the tube screw 8. This means that the inner wire W2 and the outer wire W2 are connected to each other when the brake is applied or released.
1 makes a relative movement in mutually opposite directions, and the other brake arm 6B (hereinafter referred to as C-arm)
Inner wire connection point (wire screw fixing position)
9 and the outer wire connection point of the pipe screw 8 perform angular movement with the center bolt B of the brake device as a reference point, so if the pipe screw 8 does not rotate in the left-right direction, the inner wire W2, which is made by twisting a plurality of wires together, will bend. This is because there is a risk of it being cut repeatedly. However, if the wire adjuster is
Providing the wire adjusting device at a position away from the front, which is different from the extending direction of the arm 6A, causes the load applied to the wire adjusting device to be eccentric, which results in a correspondingly large load, which is not efficient. Further, the inner wire W2 led out from the wire adjuster is passed through a hole 92 of a wire screw 91 provided in the C-arm 6B at its hanging position, and is connected to the C-arm 6B by tightening with a nut 94 via a washer 93. However, if the above-mentioned hanging position protrudes forward from the Y-arm 6A, the wire screw attachment portion 62 of the C-arm 6B is adjusted according to the protrusion.
It is necessary to bend the brake arm forward, which makes shaping the brake arm even more complicated. Further, in the conventional structure, it is not possible to release the tension of the wires while the wires are connected, and in order to do so, it is necessary to provide a rotating piece for lowering the outer wire support portion. Therefore, the present inventor has already proposed in Utility Model Application Publication No. 60-65186 that the eccentricity of the load applied to the wire adjusting device is eliminated to further improve the braking efficiency, and the bending process at the wire screw connection part of the brake arm is no longer required. In order to do this, the end of the brake arm is sandwiched from both sides in the front and back direction to connect the base part, and a receiving part is placed at the extended position of the connected brake arm, so that the load applied to the base part is transferred in the operating direction of the brake arm. By distributing the load to the brake arm, it is possible to use plastic material, and in order to make it possible to tilt the adjustment screw during braking, the seat part is configured to be tiltable at least in the left and right directions with respect to the receiving part. We have proposed a wire adjusting device based on this technology, and have achieved considerable results. The inventor further conducted extensive research into simplifying the structure of the brake wire receiver and simplifying the installation process.
The present invention was completed.

[Problem that the invention attempts to solve]

The problems of this invention are to eliminate the eccentricity of the load applied to the brake wire holder and further increase braking efficiency, as well as to eliminate the need for bending on the brake arm, and to fix the brake wire holder to the brake arm. To provide a structure for a brake wire receiving part of a brake arm which can be easily attached and detached by being latched without any problem.

[Means to solve the problem]

In order to solve the above-mentioned problems, this invention provides (a) an adjustment member receiving part having a storage hole that penetrates vertically and into which the brake wire adjustment member is fitted; (b) an adjustment member receiving part for the adjustment member receiving part; (c) providing a cylindrical pivot portion that protrudes outward from the base portion and is removably pivoted to a fitting hole formed in the brake arm; (d) is formed on the side wall of the adjustment member receiving portion near the pivot portion so that when the pivot portion is fitted into the fitting hole of the brake arm, it collides with the side wall of the brake arm in the brake wire pulling direction; The following technical measures are taken: (e) providing a locking piece that connects with the adjustment member receiving portion and restrains the brake arm in the front-rear direction together with the base portion.

[Effect]

The adjusting member receiving part is fitted into the fitting hole of the brake arm from the open side via the pivot part formed in the base part and rotated, and the side wall of the brake arm and the restraining wall are brought into contact with each other to determine the position. conduct. As a result, the adjustment member receiving portion does not rotate beyond a predetermined position in the brake wire pulling direction. In addition, since the locking piece and the base part restrain the brake arm from front and back so as to sandwich it, there is no fear that the adjustment member receiving part will shift in the front and rear direction. Further, the adjusting member receiving portion can be removed from the brake arm by rotating the base portion using the pivot portion as a fulcrum in a direction opposite to that at the time of attachment and releasing the restraint from the locking piece.

【Example】

Hereinafter, a preferred embodiment of this invention will be described based on the drawings from FIG. 1 onwards. The brake wire receiver 1 of the side-pull type caliper brake shown in FIGS. 1 to 3 has a storage hole portion 20 into which an adjustment screw 8 serving as an outer receiver is inserted.
an adjustment member receiving part 2 having an adjustment member receiving part 2, a base part 3 connected to the side of the adjustment member receiving part 2, and a fitting hole part protruding outward from the base part 3 and formed in the Y arm 5. 5H
a cylindrical pivot P that is removably pivoted to the Y-arm 5; a restraining wall 21 that collides with the side wall 51 of the Y arm in the brake wire pulling direction when the Y arm is rotated; and a locking piece that connects with the adjustment member receiving section 2 and restrains the brake arm in the front and rear direction together with the base section 3. It consists of 4. As shown in FIG. 3, the storage hole 20 formed in the adjustment member receiving portion 2 of the holder 1 includes a locking opening 20a formed in a planar polygonal shape, and a locking opening 20a formed in a planar polygonal shape.
It consists of a hole 20b that is opened downward and gradually widens so that the adjustment screw (pipe screw) 8 can be tilted at the center of the bottom surface of the hole 20a. That is, as shown in FIG. 1, the receiver 1 connects the brake wire W1,
It supports the adjusting screw 8 connected to W2 in response to the tilting of the brake wire during braking or releasing the brake. A locking opening 20a for penetrating the adjusting screw (hexagonal in plan view) is formed corresponding to the locking opening 20a, and a hole 20b is formed to gradually widen downward so as to communicate with the lower side and allow the adjusting screw 8 to tilt. It consists of the illustrated example configuration shown in a transparent manner. Here, the locking opening 20a, as shown in FIG. ) has become shaped. Therefore, the adjustment screw 8 fitted into the storage hole 20 is configured to be tiltable with the flat bottom surface of the lock nut 71 being supported by the curved bottom surface of the locking opening 20a. Next, the hole 20b has a smaller diameter than the locking opening 20a and communicates with the center thereof, and is formed to gradually widen downward, so that when the adjusting screw 8 is tilted through the lock nut 71, , its inner wall does not abut against the adjusting screw 8. Further, the restraining wall 21 formed on the side wall of the adjustment member receiving portion 2 is an arcuate wall 21a having an arcuate upper part.
and an abutment wall 21b whose lower side is formed into a vertical plane. The shape of this abutting wall 21b is set at substantially the same angle so as to correspond to the shape of the abutting side wall 51 of the Y arm 5, but in short, the Y arm 5 and the adjustment member receiving portion 2 are brake Any restraint structure may be used as long as the wire is not tilted beyond a predetermined position when the wire is pulled. A locking piece 4 extending from the front surface of the adjustment member receiving portion 2 is formed in front of the abutting wall 21b. The hooking pieces 4 are disposed parallel to the base portion 3, and the intervals between the hooking pieces 4 are set to be approximately the same as or slightly larger than the thickness of the Y arm 5. The receiver 1 formed in this manner is attached by inserting its pivot portion P into the fitting hole 5H of the Y arm 5 having a flat plate shape. That is, the adjustment member receiving part 2 is fitted into the fitting hole 5H of the Y arm 5 from the open side via the pivot part P formed in the base part 3 and is engaged when rotated along the arcuate wall 21a. It enters the inside of the stopper piece 4, and the side wall 51 of the Y arm 5 and the abutting wall 21b abut against each other in the rotational direction to perform positioning. In addition, at the determined position, the Y arm 5
is restrained and latched by the base portion 3 and the latching piece 4 so as to be sandwiched therebetween in the front and back direction with almost no gap. As a result, unless the receiver 1 is rotated in the opposite direction relative to the Y arm 5, it will not be latched in the front-rear direction by the latching piece 4 and removed. In addition, since the tilting direction during braking is the same as the rotating direction for mounting the support 1, force is applied in the direction of abutting against the abutting wall 21b, so there is no risk of it coming off, so we purposely used a fixing means. There is no need to fix the support 1 to the Y arm 5. Since the adjustment member mounting hole 20 formed in the adjustment member receiving portion 2 is disposed only slightly offset from the base end of the pivot portion P connected to the Y arm 5, the C arm 6 of the caliper brake Insert the brake wires W1 and W directly above the fixed part of the brake wires.
2 can be adjusted. Next, at the time of removal, the support 1 is rotated using the pivot portion P as a fulcrum in the opposite direction to that at the time of installation, and the locking piece 4
At the same time as releasing the restraint from the
Remove the receiving part 1 from the fitting hole 5H of the Y arm 5.
It can be removed from the In this way, in the present invention, the brake wire W
Since the receiver 1 can be attached and detached from the Y-arm 5 while 1 and W2 are connected, it is also possible to perform the so-called quick release function (6th
(see figure). That is, in the normal use (traveling) state, the receiver 1 is connected to the Y arm 5, and the outer wire W1 and the inner wire W2 each maintain tension. Therefore, when the caliper brake is displaced in the braking direction and the receiver 1 is rotated and removed from the Y arm 5, the outer wire W1 is pulled and the inner wire W2 is expanded, so that the tension between both wires is released. As a result, the repulsive force of the spring S acts to spread the brake arms 5 and 6 from the center bolt C, and the distance between the opposing brake shoes increases. In this way, the brake shoe interval is expanded to be greater than the diameter of the wheel, so that tasks such as wheel replacement can be performed without disconnecting the wires. Furthermore, since there is no tension in the wire, the fixing position of the inner wire W2, for example, can be easily adjusted in the same way. Next, to return to the tensioned state, move the brake arm in the braking direction and move the support 1 to the Y arm 5.
When the brake wires W1 and W2 are fitted into the fitting holes 5H, tension is applied to the brake wires W1 and W2, and the brake wires return to normal use. In the above embodiment, a configuration in which the brake wire receiver is connected to the Y arm of a side-pull type caliper brake is exemplified, but the type and structure of the brake and brake arm are not particularly limited in this invention. Further, the adjustment screw is not limited to a pipe screw, but may have any configuration as long as it can adjust the brake wire.

[Effect of the idea]

With the above configuration, the present invention is advantageous in that it is possible to eliminate the eccentricity of the load applied to the brake wire holder, further increasing the braking efficiency, and it is also possible to use a flat brake arm. Furthermore, since the brake wire receiver is removably connected to the brake arm by fitting the pivot portion of the receiver into the fitting hole of the brake arm, attachment and removal operations are facilitated. Further, since there is no risk of bending the brake wire in a twisting direction, the life of the brake wire can be extended, and the eccentricity of the load applied to the brake wire receiver can be eliminated, thereby further increasing braking efficiency.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing the installed state of a brake wire holder according to an embodiment of this invention; Figure 4 is a front view showing the Y arm, Figure 5 is a sectional view showing the brake wire holder attached to the brake arm, and Figure 6 is the side pull type caliper brake with the holder attached. The front view and FIG. 7 are perspective views showing a conventional example. DESCRIPTION OF SYMBOLS 1...Brake wire receiver, 2...Adjustment member receiver, 3...Base part, 4...Latching piece part, 5...Y arm, 5H...Fitting hole part, 8...Adjustment screw , P...
...axis.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) An adjustment member receiver having a storage hole that penetrates vertically and into which a brake wire adjustment member is inserted, and a base connected to the side of the adjustment member receiver. a cylindrical pivot part that protrudes outward from the base part and is removably pivoted to a fitting hole formed in the brake arm; and a side wall of the adjustment member receiving part near the pivot part. a restraining wall that is formed and abuts against or engages with a side wall of the brake arm in the brake wire pulling direction when the pivot portion is fitted into the fitting hole of the brake arm; and a restraining wall that is connected to the adjustment member receiving portion. A brake wire receiver comprising a locking piece that restrains the brake arm in the front-rear direction together with the base part. (2) The storage hole includes a locking opening formed in a planar polygonal shape, and a transparent hole that gradually widens downward so that the adjustment screw can be tilted at the center of the bottom of the locking opening. A brake wire receiver according to claim 1, characterized in that the brake wire receiver comprises: (3) A utility model characterized in that the restraining wall is composed of an arcuate wall formed in an arc shape so that the brake arm can be rotated after being fitted therein, and an abutment wall connected to the lower part of the arcuate wall. Scope of registration claims No. 1
Brake wire receiver as described in section. (4) The brake according to claim 1, wherein the brake arm is made of a flat plate, and the side wall adjacent to the fitting hole has a shape that matches the abutting wall. Wire bracket. (5) The brake wire receiver structure for a brake arm according to claim 1, wherein the locking piece is disposed in front of the abutting wall.