JPH038555Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a wire fixing device for a caliper brake for a bicycle.

(Prior Art) Generally, in a caliper brake, a pair of left and right brake arms are pivotally supported to each other so as to be able to swing freely, and an outer receiver for receiving an outer wire is provided at the end of one brake arm, and an outer receiver is provided at the end of the other brake arm. A wire fixing device is provided at the end of the inner wire to prevent it from coming off, and a wire fixing device is provided at the end of the inner wire to prevent the end of the inner wire from coming off. An adjustment bolt and adjustment nut were provided. In recent years, some caliper brakes for women's bicycles include a type in which an outer wire is received upwardly at the end of a lower brake arm, and an inner wire is attached from the bottom upward. For example, Jitsukai 57
-There is one shown in Publication No. 124490.

(Problem to be solved by the invention) However, according to the wire fixing method shown in Japanese Utility Model Application Publication No. 57-124490, the inner wire is inserted into the hole of the wire stopper, the bolt is screwed, and the bolt is fixed. This method simply clamps and fixes the straight inner wire between the end portion and the inner wall surface of the hole, and there is a high risk that the inner wire will slip from the clamping portion and become loose when the brake is operated.

Therefore, in view of the above problems, the present invention aims to prevent the inner wire from becoming loose.

(Means for Solving the Problem) The technical means is that the pair of left and right brake arms 1 and 2 are slidably pivoted to each other, and an outer receiver is provided at the end of one of the brake arms 1 to receive an outer wire 34. A wire adjustment bolt 17 through which the inner wire 35 is inserted into the end of the other brake arm 2 and an adjustment nut 38 screwed onto the wire adjustment bolt 17 are provided, and the end of the inner wire 35 is prevented from slipping out. In a caliper brake equipped with a wire fixing tool 37 for fixing, the wire adjustment bolt 17 is provided with a shaft 19 on one side of the flange body 18 that is inserted into the end of the brake arm 2 in a relatively unrotatable manner, and on the other side, an inner wire is attached. 35 is provided, and a wire fixture 37 is formed with a female screw portion 30 that is inserted through the support wall 20 and the insertion hole 25 formed in the support wall 20. Bottom cylinder part 27 and its bottom part 2
A locking recess 39 is recessed inside corresponding to the bottom 28, and the flange body 18
It consists of a fixing nut body 26 having a flange portion 29 having a flat surface 18' on the lower surface which is in contact with the upper surface, and a fastening bolt 32 screwed into the female threaded portion 30 of the fixing nut body 26. The inner wire 35 inserted into the wire insertion hole 31 formed near the bottom 28 of the fastening bolt 32
A locking recess 39 recessed in the end portion and flange portion 29
It is bent and fixed by the flange portion 29 and the support wall 20, and is sandwiched between the flange portion 29 and the support wall 20.

(Embodiment) Hereinafter, an embodiment of the present invention will be explained based on the drawings. In Figs. shaped arms 2, and brake shoes 3 are provided at one end thereof facing each other,
Both arms 1 and 2 are pivotally supported by a center bolt 4 midway.

Reference numeral 5 denotes a quick release device, which is provided at the other end of the C-shaped arm 1 and includes an eccentric shaft hole 6, a flange portion 8 that comes into contact with the front wall surface 7 of the arm, and a locking stage that protrudes from the rear wall surface 9 of the arm. A cam body 11 provided with a portion 10 is rotatably supported, and the cam body 11 is
The base of the operating lever 12 is fitted into the locking stepped portion 10 so as not to rotate relative to each other, and the base of the operating lever 12 is held between the flange 14 provided on the outer receiver 13 and the rear wall surface 9 of the arm. The shaft body 15 of the outer receiver 13 is inserted into the eccentric shaft hole 6 of the cam body 11 to be rotatably supported, and a nut body 16 as a fastener is screwed onto the shaft body 15 on the arm front wall surface 7 side. It is considered to be a fixed configuration.

17 is a wire adjustment bolt, and as shown in FIG. 3, a threaded shaft 19 is provided on one side of the flange body 18, and a support wall 20 is provided on the other side. A notch 23 is formed on one side of the screw shaft 19 and engages with a rotation restriction portion 22 provided in an overhanging manner in the insertion hole 21 at the end of the Y-shaped arm 2 to restrict relative rotation. ing. Further, a wire insertion hole 24 is formed in the screw shaft 19 through one side of the support wall 20. Furthermore, a circular insertion hole 25 is formed in the support wall 20 in a direction perpendicular to the wire insertion hole 24 . Reference numeral 26 designates a fixing nut body, which includes a bottomed cylindrical portion 27 that is inserted into the insertion hole 25, and a locking recess 3 that is formed to protrude from the bottom 28 side and corresponds to the bottom 28.
9 is recessed and has a flat surface 18' on the lower surface that contacts and supports the upper surface of the flange body 18. When the cylindrical portion 27 is inserted into the insertion hole 25, the flange portion 29 is engaged with the flange portion 18 of the support wall 20 and the fixing nut body 2.
6 is configured so as not to rotate relative to each other. A female screw portion 30 is formed on the inner peripheral surface of the bottomed cylindrical portion 27, and a wire insertion hole 31 is formed in the vicinity of the bottom portion 28 to penetrate in the radial direction. 32 is a fastening bolt screwed into the female threaded portion 30, and 33 is a washer.

The outer wire 34 is received upward by the outer receiver 13, and the inner wire 35 inserted through the outer receiver 13 is inserted through the wire adjustment bolt 17 into the insertion hole 21 at the end of the Y-shaped arm 2 in a relatively unrotatable manner.
is inserted into the wire insertion hole 24 of the fixed nut body 26, and is also inserted into the wire insertion hole 31 of the fixed nut body 26, and the fastening bolt 32 is screwed from the other side.
6 is drawn toward the support wall 20 side, and is configured to be fastened. And inner wire 35
is clamped and fixed by the end of the male threaded shaft portion 36 of the fastening bolt 32 and a locking recess 39 recessed in the flange portion 29. In addition, since the fixing nut body 26 is fastened in a state drawn toward the support wall 20,
The inner wire 35 is held between one side of the support wall 20 and the flange portion 29. Therefore, a larger clamping area can be secured, and since the inner wire 35 is fixed in a bent shape as shown in FIG. 1, the fixed state is strong, and even if the inner wire 35 is pulled during brake operation, it will not be damaged. It can prevent loosening due to accidental slipping, etc. Here, the support wall 20,
The fixing nut body 26 and the fastening bolt 32 constitute a wire fixture 37 that fixes the inner wire 35 to prevent it from coming off.

Reference numeral 38 denotes an adjustment nut, which is screwed onto the threaded shaft 19 of the wire adjustment bolt 17. By rotating the adjustment nut 38, the distance between the ends of both arms 1 and 2, that is, the distance between both brake shoes 3 and 3 can be adjusted. It is configured to be adjustable.

Further, the screw shaft 19 of the wire adjustment bolt 17 is inserted into the insertion hole 21 of the Y-shaped arm 2 so as not to rotate relatively, and the fixing nut body 26 is inserted into the insertion hole 21 of the support wall 20.
Since the fastening bolt 32 is inserted in a relatively unrotatable manner, the fastening bolt 32 can be fastened in the desired direction without rotating.
Easy to use.

As shown by the imaginary lines in FIG. 1, a waterproof cover 39 having a bellows structure made of a flexible material that can be expanded and contracted may be provided.

(Effect of the invention) According to the invention, the wire adjustment bolt is provided with a threaded shaft that is inserted into the end of the brake arm in a relatively unrotatable manner on one side, and a support wall that supports one side of the inner wire on the other side. and the wire fixing device includes the support wall, a bottomed cylindrical part formed with a female threaded part that is inserted into an insertion hole formed in the support wall, and a flange part formed overhanging on the bottom side. Consisting of a nut body and a fastening bolt that is screwed into the female threaded part of the fixed nut body, the inner wire inserted into the wire insertion hole formed in the cylindrical part engages the male threaded shaft part of the fastening bolt and the flange part. The structure is such that the inner wire is fixed in the retaining recess and also sandwiched between the flange and the support wall, which ensures a larger clamping area for the inner wire, and since the inner wire is fixed in a bent shape, the fixed state is strong and there is no possibility of damage. This has the advantage that loosening of the inner wire can be prevented.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a main part showing an embodiment of the present invention, FIG. 2 is an overall front view, and FIG. 3 is an exploded perspective view of a main part. DESCRIPTION OF SYMBOLS 1... Brake arm, 2... Brake arm, 13... Outer receiver, 17... Wire adjustment bolt, 19... Screw shaft, 20... Support wall, 25...
...Insertion hole, 26...Fixing nut body, 27...Cylinder part, 28...Bottom part, 29...Flange part, 30...
... Female thread part, 31 ... Wire insertion hole, 32 ... Fastening bolt, 34 ... Outer wire, 35 ... Inner wire, 36 ... Male thread shaft section, 37 ... Wire fixture, 38 ... Adjustment nut, 39 ...Latching recess.

Claims (1)

[Scope of utility model registration request] A pair of left and right brake arms 1 and 2 are slidably pivoted to each other, an outer receiver 13 for receiving an outer wire 34 is provided at the end of one brake arm 1, and an inner wire 35 is provided at the end of the other brake arm 2. A wire adjustment bolt 17 through which the wire adjustment bolt 17 is inserted and an adjustment nut 3 screwed onto the wire adjustment bolt 17
In the caliper brake, the wire adjustment bolt 17 is attached to one side of the flange body 18 and is provided with a wire fixture 37 for fixing the end of the inner wire 35 to prevent it from coming off.
A screw shaft 19 is provided at the end of the screw shaft 19 to be inserted therethrough so as not to be relatively rotatable, and a support wall 20 for supporting one side of the inner wire 35 is provided at the other end.
is a support wall 20 of the wire adjustment bolt 17, a bottomed cylindrical portion 27 in which a female threaded portion 30 is formed to be inserted into an insertion hole 25 formed in the support wall 20, and a bottom portion formed overhanging on the bottom portion 28 side. A locking recess 39 is recessed inside corresponding to the flange body 1 .
The fixing nut body 26 includes a flange portion 29 having a flat surface 18' on the lower surface that is in contact with the upper surface of the fixing nut body 26, and a fastening bolt 32 screwed into the female threaded portion 30 of the fixing nut body 26. The inner wire 35 inserted into the wire insertion hole 31 formed near the bottom 28 of the bolt 27 is inserted into the male threaded shaft portion 3 of the fastening bolt 32
6 ends and a locking recess 3 recessed in the flange portion 29
9. A carrier brake wire fixing device characterized in that the wire is bent and fixed by a flange portion 29 and a support wall 20.