JPH0347709B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a tire lock detection device used for automobile brake tests and the like.

(Prior Art and Problems) Conventionally, there has been no tire lock detection device used during brake tests, which has caused the following problems.

Some brake tests use roller-driven brake testers.

This roller-driven brake tester is, for example,
As shown on pages 243 and 244 of Automotive Engineering Complete Book 12 Tires and Brakes (Sankaido), a vehicle is placed on a drive roller, the drive roller is driven by an electric motor, and the reaction force when the brakes are applied causes each wheel to The purpose is to find the braking force of

However, as the brake force increases, confirmation of the locked state of the tires is currently performed visually, and it is necessary to station one person on each side of the vehicle to confirm that the tires are locked. In addition, at least four people were needed, including a person to press the brake pedal and a recorder, making it a labor-intensive process.

Furthermore, since this work was carried out in collaboration between the four workers mentioned above, and the tire lock status was communicated via humans, the accuracy of the data varied due to this collaboration, resulting in poor data accuracy. .

Incidentally, there is a handy type tachometer shown in FIG. 5 as a device for measuring the rotation of an object to be rotated.

This tachometer D presses the roller 01 at the tip against the rotating body E and measures the number of rotations of the rotating body E based on the number of rotations displayed on the meter 02 of the roller 01. When used as a tire lock detection device, there are the following problems.

Since it is a handy type, there is a tachometer D on the tire.
It requires a person to press it, and it requires the same amount of manpower as visual inspection.

In addition, since the roller 01 is not movable in the pressing direction, unevenness of the tire such as lettering may cause
If the roller 01 separates from the tire, etc., it is not always pressed into contact with the tire, resulting in an error.

(Means for Solving the Problems) The present invention aims to solve the above-mentioned conventional problems, and in order to achieve the purpose, the tire lock detection device of the present invention has the following features: A roller is provided that comes into contact with the tire and rotates as the tire rotates, and the roller is urged to come into pressure contact with the tire by a support member attached to the device body and is movable in the direction of pressure contact with the support member. a sensor roller supported by the sensor roller, fixed to the rotating shaft of the roller, and having electrically conductive parts and insulating parts arranged alternately on the outer periphery; The tire lock detection device is characterized in that it is equipped with a sensor switch consisting of a book brush contact and a display means for inputting a signal from the sensor switch and displaying the operating state of the roller.

(Function) Therefore, in the tire lock detection device of the present invention,
With the above means, when the tire becomes locked, a stop signal is output from the stop sensor, and the locked state can be known from the display on the display means into which the stop signal is input.Moreover, the stop signal is an electric signal. Therefore, it is possible to accurately detect a tire lock without any time loss, and the display means can be provided at a position away from the tire, so that it is possible to know whether the tire is locked at a position away from the tire.

In addition, since the roller is movable in the direction of pressure contact with the tire and at the same time is rotatable relative to the roller support member, when the roller is pressed against the side of the tire, irregularities such as lettering may occur on the side of the tire. Even if the tire moves, the roller moves in response to the unevenness, ensuring that the roller is in pressure contact with the tire.

(Example) Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

First, the configuration of the embodiment shown in FIGS. 1 to 4 will be described.

A is a tire lock detection device according to an embodiment of the present invention, which includes a device main body 10, a roller 20, and a support member 3.
0, a stop sensor 40, and a lamp (display means) 50.

The apparatus main body 10 is formed from a base 11 and a support 12, as shown in FIG.

Further, the support column 12 is a cylindrical square prism that is attached to the base 1.
It is located at 1.

The roller 20 is pressed against the tire B of the automobile and is rotated as the tire B rotates, so as to know the rotational status of the tire B. The roller 20 is rotatably attached to the support member 30. is supported by

Note that the roller 20 is supported by supporting a rotating shaft 21 fixed to the roller 20.

The support member 30 urges the roller 20 to come into pressure contact with the tire B, and also
This support member 30 supports a support rod 31 that is slidably supported by the column 12 of the apparatus main body 10, and an axis of the support rod 31. A support bracket 32 is provided to be rotatable about the center and supports the roller 20.
The roller 20 is supported such that its rotational axis is always perpendicular to the rotational axis of the support bracket 32.

The support rod 31 includes a large diameter part 311 and a small diameter part 312, and as shown in the figure, the small diameter part 312
is provided with a spring 313, and the roller 2
It is biased to slide in the 0 direction.

The slide of the support rod 31 due to the bias toward the roller 20 is regulated by a split pin 314 provided at the end of the large diameter portion 311 so as to be located within the support rod 12 .

Further, a bearing 315 is provided at the end of the large diameter portion 311 on the roller side.

The support bracket 32 is mounted on a bearing 315 of the support rod 31.

The stop sensor 40 detects the stoppage of rotation of the roller 20 and outputs a stop signal s, which is an electric signal.The stop sensor 40 includes a sensor roller 41 and a sensor switch 42.

The sensor roller 41 is fixed to the rotating shaft 21 of the roller 20, and conductive parts 411 that can be energized and insulating parts 412 that cannot be energized are alternately arranged on the outer periphery.

The sensor switch 42 is connected to the sensor roller 41
The support bracket 3 is positioned above the support bracket 3.
The sensor switch 42 is provided with two brush contacts 421 and 422, and the tips of the brush contacts 421 and 422 are arranged in line with and in contact with the sensor roller 41 in the axial direction.

The brush contacts 421, 422 are connected to the + side and - side of the power supply 100, respectively, and when the tips of the brush contacts 421, 422 are located in the conductive part 411, the stop sensor 40 issues an ON signal, It emits an OFF signal when the stop sensor 40 is located at the insulating part 412.
While the roller 20 is rotating, the pulse-like ON/
Outputs rotation signal r, which is an OFF signal, and rotates roller 2.
When 0 stops rotating, a stop signal s of either an ON signal or an OFF signal is output.

The lamp 50 is provided as a display means for inputting the stop signal s and displaying the stopped state of the roller 20. The lamp 50 is provided between the brush contact 422 of the stop sensor 40 and the power source 100. The light is turned on and off by the rotation signal r, and remains lit or turned off by the stop signal s.

Next, the operation of the embodiment will be explained.

When using this tire lock detection device A,
First, the magnetic base 11 is attracted to the stand T3 between the brake tester rollers T1 and T2, and the device main body 1
The device main body 10 is placed at a position where the roller 20 is in pressure contact with the tire B by the biasing force of the spring 313, that is, the support rod 31 is in contact with the split pin 3.
This is a position in which the tire B is brought closer to the tire B until it is in a retracted state from the position where the protruding slide is restricted by 14.

The lamp 50 is placed near the meter of the brake tester (not shown) so that the recorder can see the lamp 50 and the meter of the brake tester at the same time.

Next, a brake test is performed by rotating the tire B by driving the brake tester rollers T1 and T2. When the tire B rotates, the roller 20 moves the contact surface of the tire B to The support rod 3 is mounted together with the support bracket 32 so that the rotation axis 21 is perpendicular to the direction of movement of the support rod 3.
1 and rotates in accordance with the rotation of tire B.

As the roller 20 rotates, the sensor roller 41 also rotates, so that the stop sensor 40 is turned on and off.
A rotation signal r, which is an OFF pulse signal, is output, and the lamp 50 is blinked.

After that, when the brake is applied and the tire B becomes locked, the sensor roller 41 stops rotating, and the tips of the brush contacts 421 and 422 of the stop sensor 40 are connected only to either the conducting part 411 or the insulating part 412 of the sensor roller 41. The contact remained, and the stop signal s, which is either an ON signal or an OFF signal, was output, and the lamp 50 remained on or off, and the recorder realized that tire B was in a locked state. You can know how old you are.

Further, if the brake is applied while the brake tester rollers T1, T2 are rotating, a large resistance may be generated between the tire B and the brake tester rollers T1, T2, and the tire B may move back and forth.

When the position of the tire B in contact with the roller 20 moves in this way, the tire B is moved at each position.
The support bracket 32 that supports the roller 20 is different from the support rod 3, although the direction of rotation of the roller 20 is different.
1, and the direction of the rotational axis of the support bracket 32 is perpendicular to the direction of the rotational axis of the roller 20. The roller 20 can change the direction of the rotating shaft 21, thereby making it possible to prevent an error from occurring between the rotation of the tire B and the rotation of the tire B due to occurrence of friction or the like.

To explain this in a side view showing the relationship between the tire B and the roller 20 in FIG. The rotating shaft 21 faces in a direction perpendicular to the rotational movement direction a1 of the tire B.

Next, tire B moves forward and roller 20
When the relative position of the tire B and the tire B is moved to a position b, the roller 20 rotates with respect to the rotational movement direction b1 of the tire B at that position b, which is the direction with the least frictional resistance with the tire B. The shaft 21 is rotated in a right angle direction.

Next, the tire B moves backward and the roller 20
When the relative position of the tire B and the tire B is moved to a position c, the roller 20 rotates with respect to the rotational movement direction c1 of the tire B at that position c, which is also the direction with the least frictional resistance with the tire B. The shaft 21 is rotated in a perpendicular direction.

Further, if lettering B1 or the like is formed on the side of the tire B and there are irregularities, the roller 20 is elastically supported by the support member 30, so the roller 20 moves in the pressing direction according to the irregular shape. Therefore, the tire B can be rotated without causing any error in the rotation of the tire B.

Although the embodiments of the present invention have been described above in detail with reference to the drawings, the specific configuration is not limited to these embodiments, and the present invention may be modified without departing from the gist of the present invention. included.

For example, although a lamp is used as the display means in the embodiment, other means such as a speaker or a pointer may be used.

In addition, in the embodiment, the roller is biased by the support member for pressure contact with the tire between the support member and the main body of the device, but for example, in the embodiment, the bias is applied between the support bracket and the support rod. It may be carried out between the support bracket and the roller.

Further, although the support member is provided so as to be slidable relative to the apparatus main body, the support member may be an arm that is swingable relative to the apparatus main body.

In addition, the stop sensor may be one that detects the stoppage of rotation of the roller and outputs a stop signal, and may also be one that generates a pulse as the roller rotates using magnetism or light. may also be used.

Further, a magnet may not be used for the base.

(Effects of the Invention) As explained above, in the tire lock device of the present invention, the roller is provided with a stop sensor that detects the stoppage of rotation of the roller and outputs a stop signal that is an electric signal, and the tire lock device receives the stop signal. By providing a display means to display the stopped state of the rollers, it is possible to know whether the tire is locked from a distance from the tire, so when used in a brake tester, the recorder can directly check whether the tire is locked. It is possible to eliminate the need for a person checking the tire lock next to the tire and informing the recorder of the lock check, which has the effect of reducing manpower.Furthermore, it is possible to know the tire lock without human cooperation. As a result, variations in accuracy are reduced and more accurate data can be obtained.

Moreover, since the roller is movable in the direction of pressure contact with the tire, the rotation of the tire can be accurately measured because the roller is reliably pressed against the tire.

Furthermore, in addition to the above-mentioned effects, in the embodiment, since the base is formed of a magnet, the device can be easily fixed.

In addition, the stop sensor is simple and easy to manufacture, consisting of a sensor roller with alternately arranged insulating parts and conductive parts, and a sensor switch using two brush contacts. , and the cost can be reduced.

In addition, since the rotational axis of the roller is offset from the rotational axis of the support bracket, the roller is easily oscillated (rotation of the support bracket relative to the support rod), and therefore the contact position with the tire is easily moved. Easy to handle and less likely to cause errors.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing a tire lock detection device according to an embodiment of the present invention, FIG. 2 is a partially sectional plan view showing the usage state of the embodiment device, and FIG. 3 is a perspective view showing the usage state of the embodiment device. FIG. 4 is a side view showing the orientation of the rollers of the embodiment device, and FIG. 5 is a perspective view showing a conventional tachometer. DESCRIPTION OF SYMBOLS 10... Apparatus body, 20... Roller, 30... Support member, 40... Stop sensor, 50... Lamp (display means).

Claims (1)

[Claims] 1. A roller is provided that comes into contact with the tire of an automobile and rotates as the tire rotates, and the roller is urged to come into pressure contact with the tire by a support member attached to the main body of the device. With,
a sensor roller supported movably in a pressure contact direction by a supporting member, fixed to a rotating shaft of the roller, and having electrically conductive parts and insulating parts arranged alternately on the outer periphery; A tire lock detection device comprising: a sensor switch consisting of two brush contacts in contact with the roller shaft in a direction perpendicular to the roller shaft; and a display means for inputting a signal from the sensor switch and displaying the operating state of the roller. . 2. The tire lock detection device according to claim 1, which is a roller rotatably attached to the support member.