JPS6231728A - Side pull type caliper brake device - Google Patents

Abstract

PURPOSE:To make it possible to control the elasticity of a brake spring, appropriately and precisely, by making a control piece to be rotatable only around the longitudinal shaft center, and screw-feeding a control tool through rotating said control piece. CONSTITUTION:A control piece 31 is assembled between the end surface of a cap-shaped grip 31a and a flange body, through a notch. This control piece 31 can be rotated freely around the longitudinal shaft center, and can not be moved upward/downward. Then, a screw shaft 31c is screwed into the threaded hole 30 of a control tool 29. Accordingly, when the grip 31a of the control piece 31 is rotated normally or reversely by hand, the control tool 29 is screw- fed within the range of a guide part 28, and consequently, the spring force of a brake spring 19 can be controlled appropriately and precisely.

Description

[Detailed Description of the Invention] (Field of Industrial Application) The present invention relates to a caliber brake device for bicycles, and more specifically to a side bull type brake device in which the so-called brake width between the pair of left and right brake shoes and the rim is always at an appropriate value. The present invention relates to the provision of a new brake device which is equipped with a posture correction means and which is improved so as to be able to perform a braking action at the same time even if there is an imbalance in the operation transmission force that is unavoidable with Bowden cables.

(Prior art) A pair of brake arms with brake shoes that contact the wheel rim are attached to the shoulders of the handlebar bore, for example, and supported with bolts, and each arch is supported by a brake spring biased in a direction away from each other. l? The bicycle caliber brake device, in which the transmitter is pushed from one side through the entire Bowden cable against the operating force of the brake lever provided on the handle, is known as the so-called side bull system. A technique that is equipped with all means for adjusting when the desired braking force decreases due to wear of the brake pad or elongation of the Bowden cable is disclosed in Japanese Patent Publication No. 52-316258 and Japanese Patent Publication No. 53-6416-9. There are things that have been done.

(Problems to be Solved by the Invention) By the way, in all of the above-mentioned prior art, the positions of the left and right brake shoes are equidistant from the wheel rim.5.
Adjustment means T after complete brake arm set (assembly ff)! Yes, there is no consideration given to the centering of the brake arm, that is, when assembling the entire brake system! (Problem that the invention is intended to solve) Therefore, in order to ensure proper centering of the brake device, if the brake spring holder is fitted around the brake mounting axis so as to be relatively rotatable, the brake spring itself will not be restrained. This means that the brake can be returned to its proper position by operating the brake operating means in the braking direction, but even with this configuration, the Bowden cable consisting of the inner wire and the actor wire It becomes virtually meaningless if the operational transmission forces become imbalanced.

Now, if we assume that the actuator wire transmits the operation transmission force more strongly than the inner wire, the second arm corresponding to the actuator wire will unilaterally control wJwJ, and in this case, the brake spring will control this. Since the other first arm is not supported as much as possible, the other first arm tends to bend, causing one of the brake shoes to bend to one side, or not only causing trouble in driving but also making it difficult to center each brake arm. This tendency also occurs in front wheel brakes for military bicycles, but it is particularly problematic in rear wheel brakes for bicycles, where the Bowden cable must be connected to the brake lever and the braking means through bent parts.

In the present invention, even if the centering of the rim and brake shoes is not proper, if the brake lever is operated in the braking direction, proper centering is automatically guaranteed, and fine adjustment of the centering is also possible. Our goal is to provide the best brake equipment possible.

In addition, fine adjustment of centering can be carried out reliably and smoothly by screw feeding, and in order to provide a means for fine adjustment, the length of the brake mounting shaft does not have to be much longer than that of a narrower one. The purpose is to provide a brake device with

(Means for Solving All the Problems) The technical means taken by the present invention to achieve all of the above-mentioned objects are characterized by a first arm having a brake arm that approaches and separates from the rim of the wheel; The arm and all brakes are each held swingably around the mounting axis, and each arm is provided with a pair of V-kippanes that urge it in the direction of separation under full pressure. Inner wires are respectively connected to the arms, and the arch top of the brake spring having an arch shape is held by a spring holder which is fitted around the axis of the brake mounting shaft so as to be relatively rotatable, and the arch top of the brake spring is held at both ends of the arch of the brake spring. is engaged with the first arm and the second arm, respectively, and biases each arm in the direction of separation with full pressure. The adjuster holder has a plate-shaped mounting part whose plate thickness is thinned in the axial direction of the brake mounting shaft, and this flat mounting part is fitted onto the brake mounting shaft. It has a flat plate-shaped rising part 9 which is extended to one side where it also connects to the mounting shaft and rises upward. The extended flat support part for attaching the adjuster is fully raised and has a curved part when viewed from the side, and it also has a screw hole kit and an adjustment tool for adjusting the elastic force of the brake spring. an adjuster having a threaded shaft screwed into the screw hole 8 and supported on the flat support part of the holding body so as to be automatically freely movable around the vertical axis but not movable in the vertical direction with respect to the support part; The main feature is that it is equipped with a fine adjustment means by screw feeding.

(Function) Brake shoe +3 on brake mounting fi171) 16)
The first and second brake arms 111 (41'i are assembled together with the brake spring (19j). In this assembly, the brake width between the brake shoes 13+ +61 and the rim (8)) is usually approximately 21 mm. However, in Fig. 7, each shoe i3] +61 due to the solid line position
If there is a difference in the distance between the rim (8) and the rim (8), the inner wire (17
)K When the vehicle is towed and placed in the sub-motion position, the one with the smaller distance naturally contacts the rim (8) first [-1] This is where the so-called unfavorable one-sided brake is applied. In various places, the T''μ inner wire of the present invention can be
3116! Even if there is a difference in the interval between each shoe i31
f6f is rim +81! After pulling strongly until the brake spring holder El
The rim is rotatable relative to the mounting shaft [71VC, and the gunk spring held by it gives full restoring force equally to the first and second arms +11f41, so the rim [After 81K contact, 31i6i separates only during uniformity, and the attitude of the brake device is appropriately corrected with respect to the rim (8) as shown by the chain line T' in FIG.

At this time, if the boaten cable thread has a curved path (18a), the actuator wire t161 tends to transmit the operation transmission force more strongly than the inner wire 071,
The first arm tl+, which corresponds to the actuator wire, is unilaterally subjected to a braking operation, and at this time, the brake panel is not supported in such a manner that the second arm (
4) Even if you operate the brake in the braking direction and then release it, it may not be possible to guarantee proper centering. 1. Inner wiring η
If the transmission force between the actuator and the actuator wire is large and the transmission force between the actuator and the wire is small, the opposite may occur and proper centering may not be possible.

Furthermore, when assembling, the centering should be almost complete.
However, it may be necessary to make slight VC adjustments.

Since there is a fine amount of centering adjustment for various types of C, it is necessary to finely adjust the centering using a separate means.

In various cases, the present invention can adjust the grill lugs (3) of the adjuster 1311.
1a) When rotating forward and backward around the axis of f, the screw shaft (
31c) is screwed to the adjustment part A +291, so the adjustment part and the adjustment part 41 receive all the effects of the screw feed 9 in either the forward or reverse direction, and
Adjuster &91 is engaged with brake spring a9rvc regardless of direct or indirect relationship, so adjuster &311c/311c is engaged here.
) The spring feed force is transmitted to the brake spring tlIIIVC for fine adjustment. Also, for this fine adjustment, adjuster '311 has been changed as a pair on the left and right. This can also be done by letting the arm LLN41 act, but this will cause damage to the arm LLN41 and cause noise, and it will not be possible to completely correct the variations in the brake spring σ9j itself. - By acting on the brake spring (191), the arm 111f
It can fix scratches on 41 and unevenness on 091! 7! be.

(Large example) In Figs. 1 to 6, (1) is a first brake arm called a small arch or a 7-shaped arch, and a holder (2) is attached to one end of the first brake arm; (3)? have (4
) The second brake arm is called a large arch or a 0-shaped arch, and has a holder (61) at one end of the second brake arm.

The other end of the first brake arm il+ and the middle of the second brake arm (4) are superimposed on each other and held on a brake mounting shaft (7) for mounting the brake system on the vehicle body. There is a swinging T'' around the wheel, and each brake shoe i31 +6' is attached to the wheel rim (8
). In addition, each Greykish, 3
[F]6) is made of 10 pieces of wear-resistant rubber and L7'c.
Pol l-+91 in the range of the kite hole (10) shown in Figure 2.
'? When loosened, it can be adjusted freely in the radial direction of the single wheel.

Further, the first brake arm II+ has an overhanging arm (tllli) in the middle thereof, and a connector (0) for fully screwing the Akugu holder (t12i) is attached to the tip of the arm (11).

Actor holder υ2 is a cylindrical shaft, W-mounted on the connector, and (I41 is a screw adjustment body fitted onto holder u21.'Ffc, the other end of the second brake arm (4) has an inner wire Connector t151 for is attached.

The Bowden cable's Akku wire consisting of the Akku wire U61 and the inner wire η is attached to the Araku holder 02i, and the inner wire U is inserted through the Akku holder 02i and connected with the connector (151).

IHJI is a brake spring, and the overall shape is arched? Presentation (
7. It has a pair of winding parts on both shoulders of the arch to promote elasticity. Reference numeral I211 denotes a spring holder, which has a cylindrical shape with a radial holding part (24), and is fitted around the mounting shaft (71) so that it can rotate freely relative to the axis of the mounting shaft (71). Bush and other bearing bodies as shown +23
12 mounting shaft + 71 K fitting, this bearing body (23)
It is preferable to fit the holding body c++ 2 on top (- to reduce the rotational friction force of the holding body f21+.

The arch central part (top fls) of the brake spring u91 is engaged with the retaining part deer of the retaining body 31j, and each arch end part (19a l (19b)) of the spring arch extends symmetrically with respect to the mounting axis (7). The protrusions 51 formed on the back surfaces of the first arm +11 and the second arm (4) are engaged from the inside to urge the VC7 rake unit i31 +61 i in a direction away from each other.

The sharpness is a fine adjustment means, and it is fixed around the axis 9 of the mounting shaft 17).
The adjuster holder f27, which is provided at - and has the entire guide part I2 The slotted hole '301 engaged with the guide part (c)! - The adjuster 31 is screwed into the screw hole (material) of the adjuster 29) and carried by the holder (271).
1, and the holding body 2η has its annular mounting g (27
When j overlaps the rear end surface of the large diameter part (7a) of the mounting shaft (7), it is fitted around the mounting shaft InVC and is immovable around its axis, but in the embodiment, it is not engaged with the fixed shaft (71). Surface 321
? Formed in the axial direction (-1) On the other hand, the mounting is fixed by using a so-called oval hole or the like as shown in Figs. 4 and 5. It is fixed in this position. Make sure that the rising part (2”/b) of the body mouth protrudes to the side.
, and the upper side of the rising capital (270) is bent to form a supporting portion (27c).

That is, as shown in detail in FIGS. 2 to 4, the adjuster holder frame has a flat plate-like mounting portion (27a) k whose plate thickness is reduced in the axial direction of the brake mounting shaft (7). This plate-like mounting portion (27a) is connected to the brake mounting shaft (7).
1 and is immovable around the axis of the mounting shaft +71, and extends to one side intersecting the mounting shaft +71.

Furthermore, the extended end side of the flat plate-shaped mounting part +27a) is attached to the brake from the upper side of the flat plate-shaped rising part (27b) 'ik present (-1 and this flat plate-shaped rising part (27t)). It extends in the axial direction of the shaft (7) and has a flat plate-shaped support m (27c)k for attaching the adjuster 311, and has seven corner-shaped parts when viewed from the side.

Furthermore, in the diagram of the example, the kite part Q field is the rising part (
27b) is formed in a longitudinally penetrating shape and ]- in the vertical direction, and a notch is provided in the supporting portion f27c).

The shaft portion (29a) of the adjustment tool 9I is engaged with the guide portion (2S) and is prevented from coming out by crimping the collar body, so that it is movable in the vertical direction but cannot be moved in the front-back direction. A flat surface (29r:) is formed on the upper surface of the main body of the key 829+, and the other shaft portion 1b) is inserted into and engaged with the winding portion of the brake spring. . Adjuster '1111 connects the end face of the cap-shaped grip (31a) and the collar body (
The supporting part (27c) k is clamped between the support part (27c) k and assembled via the notched bar 1, and is not movable in the vertical direction around the vertical axis. The shaft (31C) is fitted into the screw hole (material) j of the key 1-cho 91, and the grip (31C) of the adjuster 131I is inserted here.
a) When manually rotated in the forward and reverse directions, the adjustment tool 129) is fed within the range between the guide parts, and the Luki spring (197 elastic force) is finely adjusted to the appropriate level. E is done.

In addition to the hole structure, the guide part t281 has an older brother part (27
It can also be constructed from the M-on-V plane itself in b).

Additionally, in the figure, '361 is a washer, which is interposed between the brake holding body 21) and the large diameter portion of the bolt (7a).

+371 is a friction washer made of 6-nylon resin, etc.
It is interposed between the base of the first arm Il+ and the spring holder (2]j. 13al is a washer;
+ and the second arm (4) overlap 8. 139) is a threaded assembly consisting of two washers and two nuts, and is fitted to the threaded part (7b) of the mounting shaft (71).
The hawks are a pair of holders that hold the rear fork when the rear brake is applied as shown in Figure 6, and the front fork when the front brake is used as shown in Figure 6 (-5 The other threaded part of the mounting shaft (7))
7c) and nut 1411, and then attach the mounting shaft (7c) here.
1 is attached to the vehicle body.

(Effects of the Invention) According to the present invention, the holder that holds the brake springs 7 that are engaged with the first brake arm and the second brake arm is rotatably fitted on the brake mounting shaft, and Since the Bowden cable is connected to the brake arm,
While being able to center the brake arm relative to the wheel rim, fine adjustment of the centering is possible using an adjuster? By rotating and feeding the entire screw of the adjustment tool, the elastic force of the brake spring? This can be done by making minor adjustments.

The mounting part of the adjuster holder, which is provided on the brake mounting shaft so that it cannot be cut around the shaft center, is a flat plate with a thinner plate in the axial direction of the brake mounting shaft. There is no need to make the axial length of the mounting shaft particularly long in order to mount the body.Even if the mounting portion of the lo2fc holder is made into a flat plate, the mounting portion will not be connected to the mounting shaft;9. It has a flat plate-like M upper part extending to one side and rising upward, and extends from the upper side of this flat plate-like rising part in the axial direction of the brake mounting shaft to adjust fc. Since it has a flat support part for attaching the child and has a cross-shaped part when viewed from the side, it is possible to securely store the adjuster even though the attachment part is flat. Operation of? An adjustment tool while making it easier? Fine adjustment of the loop panel by screw feeding can be performed reliably, and the structure can also be simplified.

[Brief explanation of the drawing]

FIG. 1 is a rear view of an example of a brake device according to the present invention, and FIG.
The figure is a side view, Figure 6 is a plan view when the device is attached to the rear fork, Figure 4 is a perspective view of the fine adjustment means, Figure 5 is an exploded view of M,
Figure 6 is a sectional view of the main parts installed on the front fork, and Figure 7 is a rear view '7'' showing the modified state. il+...first brake arm, (4)...second brake arm , +31 +61...brake brake, (
71...Mounting shaft, (81...Rim, tl131...
・Actor wire, αη... Inner wire, (18
1...Bowden cable, ■...Brake spring, e
lI...brake spring holder, trough...fine adjustment means,
Times: Adjustment tool holder, (27a)... Mounting part, +
27b) ...Stand up! JftlS, +27c)・
・・Support part, fj9+・・adjustment, 1301・・
・Screw hole, βL1...adjuster, (31cl...adjustment screw shaft. Patent applicant: Yoshigai Machine Metal Tamashiki Co., Ltd. Figure 7

Claims (1)

[Claims] 1. A first arm and a second arm each having a brake shoe that approaches and separates from the rim of a wheel are each held swingably around a brake mounting axis, and each arm is attached in a direction away from each other. An arch-shaped spring holder is provided with a biased brake spring, an outer wire is connected to one of the arms, an inner wire is connected to the other arm, and the spring holder is fitted around the axis of the brake mounting shaft so as to be relatively rotatable. In a side bull type caliper brake device in which the arch top of the brake spring is held, and both arch ends of the brake spring are respectively engaged with the first arm and the second arm to urge each arm in a direction away from each other, the brake is installed. An adjuster holder is provided on the shaft so as to be unrotatable around the axis, and the adjuster holder has a flat mounting portion that is thinner in the axial direction of the brake mounting shaft. The part is fitted over the brake mounting shaft and has a flat plate-shaped rising part that extends to one side intersecting the mounting axis and rises upward, and the brake is mounted from the upper side of this flat plate-shaped rising part. It has a flat support part for attaching an adjuster extending in the axial direction of the shaft and has an L-shaped part when viewed from the side, and further has a screw hole to adjust the elastic force of the brake spring. and a screw shaft screwed into the screw hole of the adjustment tool, and is supported on the flat support part of the holding body, is rotatable around the vertical axis, and is immovable in the vertical direction with respect to the support part. A side bull type caliper brake device, characterized in that it is equipped with a screw-adjustable adjuster and a screw-feed fine adjustment means.