JPH0949719A - Apparatus for detecting tire groove - Google Patents

Abstract

PROBLEM TO BE SOLVED: To correctly detect a depth of a tire groove where the tire is not in touch with the ground and easily position a sensor part, by arranging the sensor part for detecting the depth of the tire groove at a movable truck. SOLUTION: An inverted-L handle rod 3 stands upward from a rear part of a side wall of a movable truck 2, and a grip 4 and a brake 5 are set to the handle rod 3. Since only one handle rod 3 is erected/fixed, a predetermined part of the truck 2 can be faced to an upper peripheral part of a tire surface without interferences by the handle rod 3 with a bumper or the like of an automobile. When an operator operates a foot rest 16 by a foot, the operator can easily set the truck 2 at a proper position under the automobile. A groove detection part 17 is provided with a groove depth sensor 21 and a parallel detection sensor 22. The sensor 21, 22 is, e.g. a reflecting-type photoelectric sensor. A depth of a groove and a parallelism are detected from an output difference of the sensors. A start button 7, etc., are set on a surface of a top deck of a control unit 6.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to an automobile,
The present invention relates to a tire groove detecting device for measuring and detecting the groove depth (wear degree) of a tire in a motorcycle, a bicycle, or the like.

[0002]

2. Description of the Related Art Conventionally, as a tire groove detecting device of the above-mentioned example, there is a tire tread residual groove measuring device described in Japanese Patent Publication No. 5-62924. That is, it is a device in which a measurement box is embedded and fixed on the surface of the earth, and a transducer is movably mounted in the box to measure the groove depth of a tire.

However, this conventional device has the following problems. That is, as shown in FIG. 9, it is necessary to accurately move the vehicle 92 having the measured tire 91 to the embedded position of the device 93, and the driving operation for matching the position of the device 93 and the position of the tire 91 is complicated, In particular, the position of the tire from the driver's seat (driver's seat) becomes a blind spot, so that such matching operation is substantially difficult.

Further, since the tire 91 is measured from the ground, the weight of the vehicle body is added to the tire 91, and the deformed portion of the tire is measured by the weight of the vehicle body, which makes it impossible to accurately measure and detect the groove depth. was there. In order to make the position of the device 93 and the position of the tire 91 relatively easy to match, it is conceivable to provide stoppers at both upper ends in the longitudinal direction of the device 93 for stopping the tire at appropriate positions. In the case of such a configuration, there arises a problem that it is unsuitable for measurement of tires having different diameters.

[0005]

The invention according to claim 1 of the present invention is to dispose a sensor section for detecting a groove depth of a tire on a movable carriage so that the tire is provided at a portion other than a ground contact portion of the tire. It is an object of the present invention to provide a tire groove detection device capable of accurately detecting the groove depth of the above-mentioned sensor portion and facilitating the positioning operation of the sensor portion position with respect to the tire position.

According to a second aspect of the present invention, in addition to the object of the first aspect of the invention, the surface of the groove detecting portion provided with the above-mentioned sensor portion is made parallel to the tire surface. It is an object of the present invention to provide a tire groove detection device capable of stabilizing the sensor output and detecting the tire groove more accurately by keeping the temperature.

The invention according to claim 3 of the present invention, together with the object of the invention according to claim 2, is such that the surface of the groove detecting portion is kept parallel to the surface in the width direction of the tire. An object of the present invention is to provide a tire groove detection device that can perform accurate detection by making the distance between the surface in the width direction and the sensor constant.

According to the invention of claim 4 of the present invention, in addition to the object of the invention of claim 2, the surface of the groove detecting portion is kept parallel along the circumferential tangential direction of the tire. An object of the present invention is to provide a tire groove detection device capable of performing accurate detection by making the distance between the tangential line to the circumference and the sensor substantially constant.

The invention according to claim 5 of the present invention, together with the object of the invention according to claim 2, allows measurement when the surface of the groove detecting portion is parallel to the tire surface. ,
An object of the present invention is to provide a tire groove detection device that can always perform accurate measurement and detection of the tire groove depth.

According to the invention of claim 6 of the present invention, in addition to the object of the invention of claim 2, at least one of a plurality of wheels of the movable carriage is configured to be able to be stopped by braking, It is an object of the present invention to provide a tire groove detection device capable of improving the operability of a truck.

According to the invention of claim 7 of the present invention, in addition to the object of the invention of claim 2, the level indicating the groove depth of the detected tire groove is printed to recognize the degree of tire wear. It is an object of the present invention to provide a tire groove detection non-device capable of improving the property.

According to the invention of claim 8 of the present invention, in addition to the object of the invention of claim 2, by providing a brush means for wiping the sensing surface of the sensor portion, a good sensing effect is always maintained. An object of the present invention is to provide a tire groove detection device that can be used.

According to the invention of claim 9 of the present invention, in addition to the object of the invention of claim 2, by providing an air outlet for removing dust and water droplets adhering to the outer surface of the tire in the groove detecting portion, An object of the present invention is to provide a tire groove detection device that can detect the tire groove depth more accurately.

[0014]

According to a first aspect of the present invention, there is provided a sensor section for detecting the groove depth of a tire, and an output section for outputting the groove depth of the tire detected by the sensor section. A tire groove detecting device provided, wherein the tire groove detecting device has at least the above-mentioned sensor portion provided on a movable carriage.

The invention according to claim 2 of the present invention comprises a sensor section for detecting the groove depth of the tire and an output section for outputting the groove depth of the tire detected by the sensor section, and at least the sensor section. Is a tire groove detection device movably mounted on a trolley, the tire groove detection device including parallel securing means for keeping the surface of the groove detection part including the sensor part parallel to the tire surface. It is characterized by

According to the invention of claim 3 of the present invention, in addition to the structure of the invention of claim 2, the parallel securing means keeps the surface of the groove detecting portion parallel to the surface in the width direction of the tire. It is a tire groove detection device.

According to a fourth aspect of the present invention, in addition to the structure of the second aspect of the invention, the parallel securing means keeps the surfaces of the groove detecting portions parallel to each other along the circumferential tangential direction of the tire. It is a tire groove detection device.

According to a fifth aspect of the present invention, in addition to the configuration of the second aspect of the invention, the parallel detecting means provided in the groove detecting section and when the parallel detecting means detects parallelism. The tire groove detecting device is provided with a measurement permitting means for permitting measurement.

According to a sixth aspect of the present invention, in addition to the structure of the second aspect of the invention, a tire groove detecting device in which at least one of a plurality of wheels of the movable carriage is provided with brake means. Is characterized in that.

According to a seventh aspect of the present invention, in addition to the configuration of the second aspect of the invention, the output groove is provided with a tire groove detection means for printing a level indicating a groove depth. It is a device.

The invention according to claim 8 of the present invention is a tire groove detecting device provided with brush means for wiping the sensing surface of the sensor part, in addition to the structure of the invention according to claim 2. And

According to a ninth aspect of the present invention, in addition to the configuration of the second aspect of the invention, the groove detecting portion is provided with a blower opening for removing dust and water droplets attached to the outer surface of the tire. It is a tire groove detection device.

[0023]

According to the invention described in claim 1 of the present invention, the above-mentioned sensor portion detects the groove depth of the tire,
The above-mentioned output section outputs the groove depth of the tire detected by the above-mentioned sensor section, but since at least the above-mentioned sensor section is arranged on the movable carriage, this sensor section allows non-deformable parts other than the ground contact section of the tire to be detected. There is an effect that can be accurately detected. Moreover, even if the vehicle or the like having the tire to be detected is stopped at an arbitrary location, it is possible to easily perform the positioning operation between the tire position and the sensor position by the movement of the movable carriage provided with the sensor unit. There is an effect that it is possible to significantly improve the sex.

According to the second aspect of the present invention,
In addition to the effect of the invention described in claim 1, the parallel securing means keeps the surface of the groove detection portion having the sensor portion parallel to the tire surface. Therefore, by stabilizing the distance between the tire surface and the sensor portion, the sensor output can be stabilized, and the tire groove can be detected more accurately.

According to the invention of claim 3 of the present invention,
In addition to the effect of the invention as set forth in claim 2, since the parallel securing means keeps the surface of the groove detection portion parallel to the surface in the width direction of the tire, the surface between the width direction of the tire and the sensor is There is an effect that the distance can be made constant and accurate detection can be performed.

According to the invention described in claim 4 of the present invention,
In addition to the effect of the invention as set forth in claim 2, the parallel securing means keeps the surfaces of the groove detecting portions parallel to each other along the circumferential tangential direction of the tire. There is an effect that the distance can be made substantially constant and accurate detection can be performed.

According to the invention described in claim 5 of the present invention,
In addition to the effect of the invention described in claim 2, the parallel detection means provided in the groove detection section detects whether or not the tire surface and the surface of the groove detection section are parallel to each other, and the above-mentioned measurement permission is obtained. Since the means allows the measurement at the time of detecting the parallelism, the measurement is allowed only under the condition that the parallelism is secured. As a result, the tire groove depth can always be accurately measured and detected.

According to the invention described in claim 6 of the present invention,
In addition to the effect of the invention as set forth in claim 2, since the braking means stops braking of at least one of the plurality of wheels of the movable carriage, the surface of the groove detection section mounted on the movable carriage is changed to a tire. When operating the carriage so that it is parallel to the surface, there is an effect that the operability of the movable carriage can be improved.

According to the invention of claim 7 of the present invention,
In addition to the effect of the invention described in claim 2, since the level printing means provided in the output section prints out the level indicating the groove depth, the degree of tire wear can be easily compared with the level printing. There is an effect that it is possible to recognize and improve the recognizability.

According to the invention of claim 8 of the present invention,
In addition to the effect of the invention described in claim 2, since the brush means wipes the sensing surface of the sensor unit, there is an effect that a good sensing effect can always be maintained.

According to the invention of claim 9 of the present invention,
In addition to the effect of the invention according to claim 2, dust and water droplets adhering to the outer surface of the tire are removed by the air blown out from the air outlet formed in the groove detecting portion, so that the tire groove depth can be further improved. There is an effect that it can be detected more accurately.

[0032]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below in detail with reference to the drawings. The drawing shows a tire groove front detection device, in which a movable carriage 2 having a total of four wheels 1 is provided on the lower surface, and an inverted L-shaped handle rod 3 is erected upward from the rear part of one side wall of the carriage 2. A grip 4 and a brake lever 5 are attached to the base end of the handle rod 3 on the operating side.

Only one of the above-mentioned handle rods 3 is erected and fixed, so that the handle rod 3 can be used as a front bumper of an automobile.
A predetermined portion of the trolley 2 can be opposed to the tire surface without any interference with external components such as a rear bumper, and the operator can perform measurement detection without any forward bending posture. There is.

A control unit 6 is attached to an intermediate portion of the handle rod 3 in the vertical direction. On the top deck surface of the control unit 6 described above, a start button 7 for outputting a detection start command, a ready lamp (means for notifying the completion of preparation) 8 lit only when parallel detection is performed, and a power switch 9 used for power supply. And a power lamp 10 that lights up when the power switch 9 is turned on, and a tire position indicating button 11 for inputting the position of the tire to be measured (front right side, front left side, rear right side, rear left side). are doing.

Further, a printer 13 (see FIG. 6) having a level printing section 12 is built in the control unit 6 described above,
The printer 13 is configured to print and print the tire groove depth waveform a detected on the paper 14 together with the levels L1 and L2 (see FIG. 8), and the paper manual cutting is performed at the feeding portion of the paper 14 shown in FIG. A roll paper cutter 15 is attached.

By the way, a foot rest plate 16 is attached to the back side of the trolley 2 on the operating side, and the operator operates the foot rest plate 16 with his / her feet, so that the trolley 2 is properly positioned at the lower part of the vehicle. It is configured so that it can be easily installed in any position. On the other hand, the front part of the trolley 2 is set as the groove detecting part 17. The groove detecting portion 17 includes right and left rising flange portions 18,
Two rotary rollers 20 and 20 having a hollow pulley structure which are horizontally stretched in parallel and horizontally between 19 and the rotary rollers 20 and 2.
Whether or not the distance between the groove depth sensor 21 as a sensor portion that can be reciprocally moved (self-propelled) in the horizontal direction between 0 and the tire when the groove depth sensor 21 is self-propelled is secured. In order to determine whether
And a parallel detection sensor 22 arranged in a straight line at the upper and lower portions of the. Here, for example, a reflective photoelectric sensor is used as each of the sensors 21 and 22 described above, and the groove depth and parallelism are detected by the sensor output difference.

FIG. 2 shows the parallel securing means 23 for keeping the surface of the groove detecting portion 17 parallel to the tire surface. However, in FIG. 2, only the structure on one side is shown, but the structure on the opposite side is also similar. This parallel securing means 2
3, a support bracket 26 having an elongated hole 25 is erected on a trolley bottom plate 24, and a pin 28 protruding from a main body housing 27 of the groove detecting section 17 can be moved back and forth and rotated with respect to the elongated hole 25. Have been inserted into.

Further, the spring locking piece 29 formed on the main body housing 27 and the spring locking piece 3 projectingly formed on the truck bottom plate 24.
A tension spring 31 is stretched between 0 and 0, and the two tension springs 31 located on both sides of the main body housing 27 keep the surface of the groove detecting portion 17 parallel to the tire width direction surface. And each of the above elements 25, 2
The surfaces of the groove detecting portion 17 are configured to be kept parallel to each other along the circumferential tangential direction of the tire by means of 8, 31.

Further, a columnar or cylindrical leg portion 33 having a roller 32 pivotally attached to the lower end thereof is disposed on the front side surface of the main body housing 27, and the leg portion 33 is formed on the main body housing 27. Upper and lower wall portions 35, 3 of the recessed portion 34
5 is mounted so as to be movable up and down, and a spring 37 is stretched between a spring retainer 36 provided on the leg portion 33 and the lower surface of the upper wall portion 35 so that the leg portion 33 is constantly urged downward. are doing.

The surface of the groove detecting portion 17 set in the front portion of the main body housing 27 by the above-described structure is parallel to the circumferential tangential direction of the tire when the tire of the vehicle abuts on the rotating rollers 20, 20. In order to secure the pin 28 as a fulcrum, it moves back and forth and swings, and by the action of the left and right tension springs 31 and springs to secure the parallelism with the widthwise surface of the tire, the swing displacement in the cross dot direction in FIG. To do. That is, the groove detection unit 17 and the main body housing 27 described above are arranged on the X-axis and Y-axis with respect to the carriage 2 and the carriage bottom plate 24.
It is configured to be displaceable in the three-dimensional directions of the axis and the Z axis.

3 and 4 show the self-propelled structure of the groove depth sensor 21, in which the screw 38 is provided on the left and right side plates 18a, 19a provided at the corresponding positions of the rising flanges 18, 19 described above.
And the guide shaft 29 are mounted horizontally and parallel to each other, the groove depth sensor 21 described above is arranged on each of these elements 38 and 39, and one end of the screw 38 is connected to the rotation shaft of the motor 40. The groove depth sensor 21 is configured to reciprocate in the horizontal direction (self-propelled) by reverse driving.

A brush 42 is attached to the one side plate 18a via a brush attachment plate 41, and the sensing surface 21a of the groove depth sensor 21 as a sensor portion is attached by the brush 42.
It is configured to wipe out. The brush 42 may use a wiping member such as felt instead of the brush having a flocked structure.

Further, a blower port housing 43 is integrally attached to one side surface of the groove depth sensor 21, and a plurality of blower ports 44 are formed in rows on the upper surface of the housing 43 while the housing 43 Hose 4 for blowing air on the lower surface
5 are connected in communication. Incidentally, this hose 45 for blowing air
On the other hand, air of appropriate pressure is supplied from the air blower 46 (see FIG. 6), and the air discharged from the air blow port 44 removes dust and water droplets attached to the outer surface of the tire.

FIG. 5 shows braking means for controlling one wheel 1 located in front of the handle rod 3.
The brake wire 51 is stretched between the brake lever 5 and the brake rod 50 via the roller 47 provided inside the vehicle and the rollers 48 and 49 provided on the trolley bottom plate 24, and the above-mentioned brake lever 5 is connected to the brake lever 5 as shown in FIG. When a grip operation is performed in the direction of the arrow, the brake wire 51 that moves in the direction of the arrow
When the brake rod 50 is pushed down, the brake pad 53 attached to the pad attaching portion 52 below the rod 50 is attached to the wheel 1
The wheel 1 is configured to be pressed (contacted) with the outer peripheral surface thereof to control (brake) the wheel 1.

Here, a return spring 55 is stretched between the spring retainer 54 provided integrally with the above-mentioned brake rod 50 and the upper surface of the truck bottom plate 24, so that the above-mentioned brake rod 50 and brake pad 53 are provided. The spring is always biased upward (non-braking direction).

FIG. 6 shows a control circuit of the tire groove detecting device. The CPU 60 has a start button 7, a power switch 9,
RO based on various necessary signal inputs from the tire position instruction button 11, the groove depth sensor 21, and the parallel detection sensor 22.
According to the program stored in M56, the ready lamp 8, the power lamp 10 (not shown in FIG. 6), the printer 1
3, the motor 40, the blower 46, and the communication controller 58 are driven and controlled, and the RAM 57 stores waveform data corresponding to the detected tire groove depth, data necessary for printing the levels L1 and L2, and the tire position instruction button 11. The necessary data such as the data indicating the tire position required for printing and the map are stored.

Here, the printer 13 provided with the above-mentioned level printing unit 12 prints and prints the waveform a (see FIG. 8) of the detected tire groove depth on the paper 14 together with the levels L1 and L2. Further, the above-mentioned communication control unit 58 communicates necessary data with a POS (Point Of Sales, point-of-sale information management device) on the center side.

Further, the above-mentioned CPU 60 permits the measurement when the parallel detecting sensor 22 as the parallel detecting means detects the parallelism of the groove detecting portion 17 with respect to the tire (the first step of the flowchart shown in FIG. 7). (See S1). The operation of the tire groove detecting device configured as described above will be described in detail below with reference to the flowchart shown in FIG.

When the carriage 2 shown in FIG. 1 is carried and the surface of the groove detecting portion 17 is brought into contact with the tire of the automobile through the upper and lower rotating rollers 20, 20, the parallel securing means 23 shown in FIG. Due to the action, the groove detecting portion 17 is displaced in the three-dimensional direction and becomes parallel to the surface in the tire width direction and the circumferential tangential direction of the tire.

When the parallel detection sensor 22 is activated by turning on the power switch 9, the first step in the flowchart shown in FIG.
In step S1, the CPU 60 determines from the output of the parallel detection sensor 22 whether or not the surface of the groove detection unit 17 is arranged in parallel with the tire.
Only at the time of determination), the process proceeds to the next second step S2.

In the above-mentioned second step S2, the CPU 60 turns on the ready lamp 8 and sets the depression of the start button 7 as an allowable condition. In the next third step S3, the CPU 6
For 0, it is determined whether or not the start button 7 is pressed and turned on, and only when the start button 7 is turned on, the process proceeds to the next fourth step S4.

In this fourth step S4, the CPU 60 discloses the air blowing by the air blowing means 46. When the blower unit 46 is driven, the air supplied from the hose 45 to the blower port housing 43 is discharged from the blower port 44 to remove dust and water droplets adhering to the outer surface of the tire.

Next, in a fifth step S5, the CPU 60 drives the motor 40 in the normal direction. When the motor 40 rotates, FIG.
The groove depth sensor 21 shown in FIG. 6 horizontally moves in the direction of the solid line arrow in the figure while being guided by the guide shaft 39 by the rotation of the screw 38, and sequentially detects the tire groove depth from the width direction start end side to the width direction end side. .

Next, in a sixth step S6, the CPU 60 stores the rotation speed or rotation amount of the motor 40. Then the seventh
In step S7, the CPU 60 causes the groove depth sensor 21 described above.
Read the tire groove waveform data from.

Next, in the eighth step S8, the CPU 60 causes the tire groove waveform a corresponding to the tire groove waveform data (see FIG. 8).
Together with the levels L1 and L2 are printed out on the above-mentioned paper 14. Next, in a ninth step S9, the CPU 6
0 determines whether or not the output from the groove depth sensor 21 has changed for a certain period of time, in other words, whether or not the detection of the groove depth of the entire width of the tire has been completed, and the fourth step S4 at the time of NO determination.
On the other hand, when YES is determined, the process proceeds to the next tenth step S10.

In the tenth step S10 described above, the CPU 6
0 stops the driving of the air blowing means 46, and in the next eleventh step S11, the CPU 60 rotates the motor 40 in the reverse direction in accordance with the stored rotation speed or rotation amount, and the groove depth sensor 21 shown in FIG. Move horizontally in the direction of the dotted arrow in the figure. Next, in a twelfth step S12, the CPU 60 stops the rotation of the motor 40 when the reverse rotation amount of the motor 40 becomes equal to the previous forward rotation amount, and ends the series of processes.

In summary, the above-mentioned groove depth sensor 21 detects the groove depth of the tire, and the above-mentioned output unit (printer 13
The reference groove depth sensor 21 outputs the groove depth of the tire detected by the groove depth sensor 21. Since at least the groove depth sensor 21 described above is arranged in the movable carriage 2, the groove depth sensor 21 detects the tire depth. There is an effect that the non-deformed portion other than the grounded portion can be accurately detected. Moreover, even if the vehicle or the like having the tire to be detected is stopped at an arbitrary position, the groove depth sensor 2
By moving the movable trolley 2 provided with 1, the tire position and the sensor position can be easily positioned, and there is an effect that such operability can be greatly improved.

Further, the parallel securing means 23 keeps the surface of the groove detecting portion 17 having the groove depth sensor 21 parallel to the tire surface. Therefore, by stabilizing the distance between the tire surface and the sensor portion, the sensor output can be stabilized, and the tire groove can be detected more accurately.

Further, since the parallel securing means 23 (more specifically, refer to the element 31) keeps the surface of the groove detecting portion 17 parallel to the surface in the width direction of the tire, There is an effect that the distance from the sensor can be made constant and accurate detection can be performed.

Furthermore, since the above-mentioned parallel securing means 23 (more specifically, refer to the elements 25, 28 and 31) keeps the surfaces of the groove detecting portion 17 parallel to each other along the circumferential tangential direction of the tire, There is an effect that the distance between the circumferential tangent line and the sensor can be made substantially constant, and accurate detection can be performed.

In addition, the parallel detecting sensor 22 provided in the groove detecting section 17 detects whether or not the tire surface and the surface of the groove detecting section 17 are parallel to each other, and the measurement permitting means (first Since the measurement is allowed at the time of parallel detection in step S1), the measurement is allowed only under the condition that the parallelism is secured. As a result, the tire groove depth can always be accurately measured and detected.

Further, since the brake pad 53 described above brakes and stops at least one of the plurality of wheels 1 of the movable carriage 2, the surface of the groove detecting portion 17 mounted on the movable carriage 2 is set to the tire surface. There is an effect that the operability of the movable carriage 2 can be improved when the carriage is operated so as to be parallel to it.

Further, since the level printing unit 12 provided in the above-mentioned output unit (see printer 13) prints out the levels L1 and L2 (see FIG. 8) indicating the groove depth, in comparison with this level printing. It is possible to easily recognize the degree of tire wear and improve the recognizability.

Moreover, since the above-mentioned brush 42 wipes the sensing surface 21a of the groove depth sensor 21, there is an effect that a good sensing effect can always be maintained. In addition, since dust and water droplets attached to the outer surface of the tire are removed by the air discharged from the blower port 44 formed in the groove detection unit 17, the tire groove depth can be detected more accurately. There is.

In the correspondence between the configuration of the present invention and the above-described embodiment, the sensor unit of the present invention corresponds to the groove depth sensor 21 of the embodiment, and the output unit is the printer 13 in the same manner.
The parallel detection means corresponds to the parallel detection sensor 22, and the measurement permission means corresponds to the first step S controlled by the CPU.
1, the braking means corresponds to the brake pad 53, the level printing means corresponds to the level printing section 12,
The brush means corresponds to the brush 42.
It is not limited only to the configuration of the above embodiment.

For example, it goes without saying that the braking means may be provided on the two wheels 1 and 1 located on the diagonal line.

[Brief description of drawings]

FIG. 1 is a schematic perspective view showing a tire groove detection device of the present invention.

FIG. 2 is a side view showing a configuration of parallel securing means.

FIG. 3 is a side view showing a self-propelled structure of a sensor unit.

FIG. 4 is a sectional view taken along line AA of FIG. 3;

FIG. 5 is a system diagram showing braking means.

FIG. 6 is a control circuit block diagram.

FIG. 7 is a flowchart showing tire groove detection processing.

FIG. 8 is an explanatory diagram showing an example of a printed waveform.

FIG. 9 is an explanatory view of a conventional tire groove detecting device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Wheel 2 ... Cart 12 ... Level printing part 13 ... Printer 17 ... Groove detection part 21 ... Groove depth sensor 21a ... Sensing surface 22 ... Parallel detection sensor 23 ... Parallel securing means 42 ... Brush 44 ... Blower 53 ... Brake pad S1 ... Measurement allowance means

Claims (9)

[Claims] 1. A tire groove detection device comprising a sensor section for detecting the groove depth of a tire and an output section for outputting the groove depth of the tire detected by the sensor section, wherein at least the sensor section is provided. A tire groove detection device installed on a movable carriage. 2. A tire having a sensor section for detecting the groove depth of the tire and an output section for outputting the groove depth of the tire detected by the sensor section, and at least the sensor section provided on a movable carriage. A tire groove detecting device comprising parallel ensuring means for keeping the surface of the groove detecting part comprising the sensor part parallel to the tire surface. 3. The tire groove detecting device according to claim 2, wherein the parallel securing means keeps the surface of the groove detecting portion parallel to the surface in the width direction of the tire. 4. The tire groove detecting device according to claim 2, wherein the parallel securing means keeps the surface of the groove detecting portion parallel along the circumferential tangential direction of the tire. 5. The tire groove detecting device according to claim 2, further comprising: parallel detecting means provided in the groove detecting section; and measurement permitting means for permitting measurement when the parallel detecting means detects parallelism. 6. The tire groove detecting device according to claim 2, wherein braking means is provided on at least one of a plurality of wheels of the movable carriage. 7. The tire groove detecting device according to claim 2, wherein the output section is provided with level printing means for printing a level indicating a groove depth. 8. The tire groove detecting device according to claim 2, further comprising brush means for wiping a sensing surface of the sensor section. 9. The tire groove detecting device according to claim 2, wherein the groove detecting portion is provided with an air outlet for removing dust and water droplets adhering to the outer surface of the tire.