JPH0367897B2 - - Google Patents

Description

Detailed Description of the Invention "Field of Industrial Application" The present invention includes an operating handle that is supported for braking operation, and a restraining member that prevents the operating handle from returning during braking, and is capable of detecting braking force. This manual brake device is used in, for example, automobiles and industrial vehicles.

"Prior Art" Conventionally, in manual brake systems commonly used in automobiles, for example, a position detection switch operates when the operating handle is displaced to a predetermined position, and the degree of braking is detected by the operating stroke of the operating handle. was common.

In addition, as disclosed in Japanese Utility Model Application No. 60-78656, a coil spring is interposed between the operating handle (operating rod in the publication) and the sleeve that transmits the load, and the deflection of the coil spring causes Something that detects the braking state has been proposed.

``Problems to be Solved by the Invention'' However, with such conventional manual brake devices, in the former case where the braking state is detected by the operating stroke of the operating handle, the operating stroke may fluctuate due to looseness in the transmission system, etc. Even in such cases, it is necessary to detect and judge whether the braking force is appropriate at the same position, so it may not be possible to reflect the braking condition correctly and it may not be possible to detect a braking failure condition. There is a problem.

In the latter case, the braking force is detected by the displacement that resists the elastic force of the coil spring, so the above-mentioned problem does not occur.
Since the coil springs are now subject to operating forces directly, a coil spring with strong resiliency is required, which not only increases weight and cost, but also makes it necessary to store the coil spring in a limited space. When designed, there were problems in that reliability against fatigue was low and durability was reduced.

The present invention was made in view of these conventional problems, and it is an object of the present invention to provide a manual brake device that accurately reflects the braking force, has a sufficiently durable structure, and is capable of detecting the braking force. The purpose is

``Means for Solving the Problems'' The gist of the present invention for achieving the above object is to provide an operating handle that is supported so as to be capable of performing a braking operation in response to a braking reaction force, and a control handle that returns during braking. In a manual brake device that has a restraining member that stops the brake and is capable of detecting braking force, a swinging member that detects the braking force is pivotally attached to a support member, and a guide member is connected and attached to the tip of the swinging member. the guide member is provided with the restraining member, the base end of the swinging member extends along the support member, the operating handle is inserted through and guided by the guide member, and the swinging member is pivoted. a resilient member having a biasing force in the direction of receiving braking force is interposed between the proximal end of the swinging member and the support member; A switch is provided between the supporting member and the base end of the swinging member to detect displacement due to swinging, and the return force of the operating handle during braking is received by the elastic member, and the elastic force is applied to the return force of the operating handle during braking. The manual brake device is configured such that the switch detects braking force based on the displacement of the swinging member against which the swinging member resists.

"Operation" When the operating handle is stopped by the restraining member during braking, the braking force is transmitted from the guide member to the tip of the swinging member, and the swinging member resists the urging force of the urging member due to the braking force. The displacement of the base end of the rocking member due to this rocking is detected by a switch, and the lever ratio of the tip end and base end to the rocking center of the rocking member is used to detect the displacement of the base end of the rocking member. The braking force is transmitted at a reduced rate so that even a resilient member with a small biasing force can be used.

“Embodiment” An embodiment of the present invention will be described below based on the drawings.

1 and 2 show one embodiment of the invention.

In the brake device 10, a swinging member 30, a ratchet pawl 40 serving as a restraining member, and a guide member 31 are attached to the tip of a base bracket 20, which is a supporting member, and an operating lever 50 is pivoted to a base member 21 of the base bracket 20. The operating handle 60 is inserted into the guide member 31 and its tip is connected to the free end 52 of the operating lever 50 to be supported for braking operation.
Cable A, which serves as a transmission member to the braking area, is located at the base of the
are connected.

The base bracket 20 has a base portion 21 and a mounting bracket 22 fixed to a mounting portion of a vehicle body or the like. A return detection switch 23 is mounted on the base 21 facing the base of the operating lever 50.

The swinging member 30 is pivotally attached to the tip end 24 of the base bracket 20 via a pivot shaft 25, and the swinging member 30
A guide member 31 is pivotally attached to the tip of the handle via a pivot pin 32, and a ratchet pawl 40, which is a restraining member for preventing the operating handle from returning, is pivotally attached.

The guide member 31 has a guide cylinder portion 33 as its main part,
The rod portion 61 of the operation handle 60 is the guide member 31
The guide tube 33 is slidably inserted into the guide tube 33, and the side of the guide tube 33 facing the ratchet pawl 40 is open.

The proximal end 34 of the swinging member 30 extends along the bottom surface 26 of the distal end 24 of the base bracket 20,
An elastic member 36, which is a coil spring, is stretched between a seat 35 provided at an intermediate position of the base end portion 34 and a mounting bracket 22 fixed at a position corresponding to the base bracket 20. The head of member 36 is connected to adjustment screw 27 provided in mounting bracket 22.
is being held down.

Due to the biasing force of the resilient member 36, the proximal end 34 floats above the bottom surface 26 of the distal end 24 of the base bracket 20 in the non-braking state.

A pushing piece 3 is provided at the distal end of the proximal end 34 of the swinging member 30.
7 is fixedly installed, facing the push piece 37, and a switch 11 for detecting displacement is supported by the mounting portion. When the brake is not applied, the switch 11 is turned off.

The ratchet pawl 40 has a toe 41 connected to the guide member 31.
The rod portion 61 of the operating handle 60 is faced through the opening, and the toe 41 is biased in a direction so as to come into elastic contact with the rod portion 61 by a biasing spring 42.

The operating handle 60 is provided with a handle 62 at the top of a rod portion 61, and a locking tooth 63 is carved on the side of the rod portion 61 in a direction that prevents the rod from returning when the toe 41 is engaged. A connecting bracket 64 is connected to the lower end of the portion 61 via a circumferential groove 65 and a pin 66 implanted in the rod portion 61. Pin 66 and connecting bracket 6
A spring 67 is tensioned between the rod portion 4 and the rod portion 61 to bias the rod portion 61 in one direction. Connection bracket 64
is connected to the free end 52 of the operating lever 50 via a connecting pin 68.

Next, the action will be explained.

The solid line in FIG. 1 indicates the non-braking state, and when the handle 62 is pulled up, the rod portion 61 of the operating handle 60 slides within the guide cylinder portion 33 of the guide member 31, and the toe 41 of the ratchet pawl 40 is moved upward. is locking tooth 6
Overcome 3 one after another. Even if the handle 62 is released, the toe 41 cannot get over the locking teeth 63 in the return direction, so the return is prevented.

As the operating handle 60 is pulled up, the free end 52 of the operating lever 50 is pulled via the connecting pin 68, causing the operating lever 50 to rotate counterclockwise in FIG. Since the cable A is pulled by the rotation of the operating lever 50, the operating force is transmitted to the braking area.

As the operating lever 50 rotates, the free end 52 follows an arcuate trajectory, and the operating handle 60 is not only pulled up linearly, but also swings somewhat around the pivot pin 32.

When the operating handle 60 is pulled up sufficiently, the reaction force of the cable A increases, and you can feel that the braking force has become considerably large. When you release the handle 62 at an appropriate point, the locking teeth 63 will ratchet. The operating handle 60 is locked by the tip 41 of the claw 40 and is prevented from returning.

The return force of the operating handle 60 rotates the swinging member 30 about the pivot shaft 25, and the swinging member 30 rotates by a small angle clockwise in FIG. 1 while compressing the resilient member 36. When the reaction force of the cable A is sufficient and the braking force is sufficient, the pushing piece 37 at the end of the proximal end 34 of the swinging member 30 is displaced considerably, and the switch 11, which had been turned off, is activated. Turn it on. The operation of this switch 11 is displayed on a lamp or meter as necessary to detect the braking state. This display is always detected when braking.

If the reaction force of the cable A is insufficient, the amount of displacement of the pushing piece 37 is insufficient and the switch 11 cannot be operated, indicating that the braking force is insufficient. The return force of the operating handle 60 is generated by the pivot 25.
Since a reduced amount is transmitted to the resilient member 36 depending on the lever ratio centered on , it is possible to set the resilient member 36 with appropriate specifications by appropriately setting the lever ratio.

If the braking force is sufficient, the base end 34 of the swinging member 30 will come into contact with the bottom surface 25 of the base bracket 20, and the elastic force of the elastic member 36 will no longer affect the braking force.

To return the operating handle 60, hold the handle 62 and rotate the portion above the rod portion 61 relative to the connecting bracket 64 against the biasing force of the spring 67.
Then, the locking tooth 63 engages the toe 4 of the ratchet pawl 40.
1, so if you insert the operating handle 60 as it is, the cable A will not engage.
As the operating lever 50 rotates due to the reaction force of the braking force, it returns to the non-braking position.

When the handle 62 is released after returning to the non-braking position, the spring 67 rises from the rod portion 61 of the operating handle 60.
The locking teeth 63 are rotated by the biasing force of , and the locking teeth 63 reach a position where they engage with the toe 41 of the ratchet pawl 40, completely returning to the non-braking state.

While the operating handle 60 returns, the elastic member 3
The swinging member 30 is rotated counterclockwise by the biasing force 6, and the switch 11 is turned off, indicating that the braking force is insufficient.

When the operating handle 60 is completely returned, the operating lever 50 hits the return detection switch 23, the return detection switch 23 is turned off, and it is possible to detect that the brake is not in a dragging state.

In addition, the above-mentioned embodiment is a so-called stick-type manual brake device, and the operation handle 60
Although the returning force is detected by the swinging member 30 attached to the base bracket 20, a similar structure can be implemented by installing a swinging member at the tip of the operating lever 50.

More specifically, if it has an operating handle that is supported for braking operation and a restraining member that prevents the operating handle from detenting during braking, the structure of the present invention can be implemented at the detenting part. It can also be applied to lever-type manual brake devices.

Further, in the embodiment described above, the immovable base bracket 20 is used as a support member, but the operating handle 60 may also be used as a support member.

"Effects of the Invention" According to the manual brake device according to the present invention, braking force is detected using the return force of the operating handle corresponding to the braking force as a medium, and the return force is reduced and transmitted to the elastic member for detection. By doing so, the elastic member can be appropriately set, and the elastic member can be made smaller and lighter, and sufficient durability can be obtained without being damaged due to fatigue or the like. Further, the detection load can be easily set and adjusted, and the operating characteristics can be improved.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, in which FIG. 1 is a front view of a manual brake device, and FIG. 2 is a plan view of the same. 10...Brake device, 11...Switch, 2
0... Base bracket, 30... Swinging member, 3
4... Base end portion, 36... Resilient member, 40... Ratchet claw, 50... Operation lever, 60... Operating handle, 61... Rod portion, 62... Handle.

Claims (1)

[Scope of Claims] 1. A manual brake device that includes an operating handle that is supported so as to be able to perform a braking operation in response to a braking reaction force, and a restraining member that prevents the operating handle from returning during braking, and that is capable of detecting braking force. A swinging member for detecting braking force is pivotally mounted on a support member, a guide member is connected and attached to a distal end of the swinging member, the restraining member is provided on the guide member, and a proximal end of the swinging member is provided with the restraining member. extends along the support member, the operating handle is guided through and supported by the guide member, the swing member is set so that the proximal end is longer than the distal end with respect to the pivot, and the braking force is applied to the swing member. An elastic member having a biasing force in a receiving direction is interposed between the base end of the swinging member and the support member, and a resilient member having a biasing force in the receiving direction is interposed between the support member and the base end of the swinging member. A switch is provided to detect displacement, and the resilient member receives the return force of the operating handle during braking, and the switch detects the braking force based on the displacement of the swinging member that resists the resilient force. Manual brake device.