JPS6313479Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a tire tread pattern measuring device in a tire testing device.

As a method to transfer the contact area and shape of an aircraft, automobile, etc. tire when it comes into contact with the ground and a load is applied, that is, the tire's tread pattern, the tire is coated with ink or paint and pasted on a static test board. There is a method of transferring the tire by pressing it onto the printed paper, but this requires the use of a tire dynamic testing device that uses a rotating drum or a testing device separate from the tire running test device, and also requires the use of a tire dynamic testing device that uses a rotating drum. It was not possible to conduct the test in the middle of the actual test.

The present invention has been made with the aim of eliminating the drawbacks of the conventional tire tread pattern transfer means, and includes a movable tire pressing plate provided between the drum and the tire, and a tire pressing plate movably provided between the drum and the tire. This relates to a tire tread pattern measuring device that incorporates pressure-sensitive paper or a pressure-sensitive element on the surface and transfers or measures the tread pattern when the tire is pressed.

Embodiments of the present invention will be described below based on the drawings.

FIG. 1 shows an outline of the tire testing device, in which 1 is a drum rotatably driven by a drive device;
Reference numeral 2 designates a tire to be tested supported by a holder 3 in a cantilever manner, 4 a carriage, and 5 a cylinder that moves the carriage 4 and tire 2 forward and backward relative to the flywheel 1.

Two rods 6 in the axial direction of the drum 1 are attached to the frame 8 with bearings 7 so as to be vertically parallel, and a screw rod 9 is rotatably supported by the bearings 7 between each rod 6, A tire 2 is attached to a movable arm 10 which is screwed into the screw rod 9 at its base and passes through the two rods 6.
It has a pressure-sensitive paper 11 that is larger than the surface that comes into contact with the flywheel 1 and is removably attached to one surface as shown in FIG. 2, and can be closely fitted to the surface of the drum 1 on the opposite surface. A tire pressing plate 12 having a curved concave surface 14 is attached via a hinge 13 with a stopper.

The screw rod 9 to which the moving arm 10 is screwed is rotated by a motor with a speed reducer (not shown), and together with the moving arm 10, the screw rod 9 is rotated by a motor with a speed reducer (not shown).
2 is configured to be able to move left and right along the drum 1 between the drum 1 and the tire 2.

When measuring the tread pattern of the tire 2, the screw rod 9 is rotationally driven to move the tire pressing plate 12 together with the moving arm 10 screwed into the screw rod 9 to the center of the width of the drum 1.

Next, when the tire 2 is moved toward the drum 1 by the cylinder 5 and pressed against the tire pressing plate 12 as shown in FIG.
is the movable arm 10 via the hinge 13 with a stopper.
Since the tire 2 is swingably mounted on the tire side surface of the tire pressing plate 12, the curved concave surface 14 of the tire pressing plate 12 uniformly contacts and is supported by the surface of the drum 1. Pressure sensitive paper 1
The tire 2 is pressed and deformed until it becomes equal to the required rolling radius or until a predetermined load is applied to the wheel, and the tread pattern such as the contact area and shape of the tire 2 is recorded on the pressure-sensitive paper 11.

After the measurement of the tread pattern of the tire 2 is completed, the cylinder 5 is contracted to separate the tire 2 from the tire pressing plate 12, and the tire pressing plate 12 is moved to the retracted position, and then the next dynamic test can be performed again. can be done.

FIG. 4 shows an example of a pressure sensitive element 15 installed in the tire pressing plate 12 used in another embodiment of the present invention.

By using the pressure-sensitive element 15, it is possible not only to draw or display the shape of the tread pattern when the tire 2 is pressed using the pressure-sensitive element in contact with the tire 2, but also to display the tread pattern when the tire 2 is pressed, as in the above embodiment. It is also possible to measure the tread pattern even during a test such as a static torque test using the pressing plate 12.

Note that the tire tread pattern measuring device of the present invention is not limited to the above-mentioned embodiments.
The present invention has the following advantages: the pressure-sensitive sensor attached to the tire pressing plate may be a pressure-sensitive film, aluminum foil, etc., and the drive means for the moving arm may be a mechanism using a cylinder instead of an electric screw mechanism using a screw rod. Of course, various changes can be made without departing from the spirit of the invention.

As described above, according to the tire tread pattern measuring device of the present invention, since the tire pressing plate having a pressure sensor is movably provided between the tire and the drum, the tire tread pattern can be measured in the actual test. It can be easily measured on the machine. In particular, if a pressure-sensitive element is attached to the tire pressing plate, tread patterns can be measured even during various tests. Furthermore, since the tire pressing plate can be easily moved, other tests can be carried out immediately after the test is completed.

[Brief explanation of drawings]

Fig. 1 is an explanatory diagram of a tire testing machine equipped with the device of the present invention, Fig. 2 is an explanatory diagram of a tire pressing plate used in the device of the present invention, and Fig. 3 is an explanatory diagram showing how the device of the present invention is used. , FIG. 4 is an explanatory diagram of a pressure sensitive element used in another embodiment of the device of the present invention. In the figure, 1 is a drum, 2 is a tire, 5 is a cylinder, 6 is a rod, 7 is a bearing, 8 is a frame, 9 is a screw rod, 10 is a moving arm, 11 is a pressure sensitive paper, 12 is a tire pressing plate, and 14 is a curved Concave, 1
5 indicates a pressure sensitive element.

Claims (1)

[Scope of utility model registration request] A tire pressing plate having a concave surface matching the outer peripheral surface of the drum is mounted on the rotating drum contact side so as to be movable in the drum axis direction between the tire and the drum, and a pressure sensor is installed on the tire contacting surface of the tire pressing plate. A tire tread pattern measuring device characterized by being attached.