JP6501554B2 - Vent hole cleaning jig, vent hole cleaning device and vent hole cleaning method - Google Patents

Description

  The present invention relates to a vent hole cleaning jig for cleaning a vent hole provided in a tire vulcanization mold, a vent hole cleaning device provided with the vent hole cleaning jig, and a vent hole cleaning method.

  A pneumatic tire is manufactured by vulcanizing a green tire using a tire vulcanization mold (hereinafter, also simply referred to as a "mold"). The mold is provided with a vent hole for removing air accumulated between the green tire and the molding surface.

  However, at the time of vulcanization, the vent holes may be clogged with rubber. After vulcanization, the mold surface is hit with beads to remove dirt on the surface (shot blasting), but at that time, the beads may get stuck in the vent holes and be clogged.

  Then, in order to eliminate such clogging of a vent hole, cleaning of a vent hole is performed suitably (for example, patent documents 1-patent documents 5).

  Specifically, after the worker guides and inserts the cone attached to the motor to the vent hole, the vent hole is cleaned by rotating the inserted cone by the motor.

JP-A-2-59163 JP-A-5-329854 JP-A-9-141672 JP 2007-118460 A JP, 2009-119819, A

  However, since the diameter of the vent hole is as small as at most 1 mm, it is not easy to manually guide the cone to the inside of the vent hole, and it requires skill in the cleaning operation. Moreover, although a split mold in which an annular mold is divided into a plurality of molds is usually used for the mold, since a large number of vent holes of about 100 per split mold are provided, skilled work Even the elderly person takes time for cleaning work.

  Then, this invention makes it a subject to provide the cleaning technique of the vent hole which can clean a vent hole efficiently in a short time, even if it is not a skilled worker.

The invention according to claim 1 is
A vent hole cleaning jig for cleaning a vent hole provided in a mold for tire vulcanization, comprising:
A drill which is rotated by the rotation of a motor connected to one end and cleans the inside of the vent hole at the other end;
And a tube through which the cone is inserted at a central portion,
It is a vent hole cleaning jig characterized in that the tube has a guide function of guiding the cone into the inside of the vent hole.

The invention according to claim 2 is
The vent hole cleaning jig according to claim 1, wherein the cone is made of a piano wire.

The invention according to claim 3 is
The vent hole cleaning jig according to claim 2, wherein the surface of the piano wire is a brush-like surface.

The invention according to claim 4 is
It is a vent hole cleaning jig according to claim 2 or 3, wherein the awl is a knit of the piano wire.

The invention according to claim 5 is
A vent hole cleaning jig according to any one of claims 1 to 4.
A sensor for detecting the position of the vent hole;
A robot hand attached with the sensor and the vent hole cleaning jig;
The robot hand is attached, and the robot further comprises: an articulated robot for positioning the vent hole cleaning jig attached to the robot hand at the position of the vent hole detected by the sensor. Vent hole cleaning device.

The invention according to claim 6 is
The vent hole cleaning apparatus according to claim 5, wherein the sensor is a 2D sensor or a 3D sensor.

The invention according to claim 7 is
The vent hole cleaning jig positioned at the position of the vent hole detected by the sensor is controlled so as to automatically push the cone into the vent hole. It is a vent hole cleaning apparatus as described in these.

The invention according to claim 8 is
The vent hole cleaning apparatus according to any one of claims 5 to 7, wherein the articulated robot is a six-axis articulated robot.

The invention according to claim 9 is
A vent hole cleaning method for cleaning a vent hole provided in a mold for tire vulcanization, comprising:
A guiding step of guiding the cone into the inside of the vent hole by a guide function of a tube in which a cone whose one end is connected to a motor is inserted in a central portion;
And the cleaning step of cleaning the inside of the vent hole by rotating the cone guided into the inside of the vent hole by the rotation of the motor.

The invention according to claim 10 is
A vent hole cleaning method for cleaning a vent hole provided in a tire vulcanization mold using the vent hole cleaning device according to any one of claims 5 to 8,
Placing the tire vulcanizing mold on a mounting table;
Positioning at a position of the vent hole a vent hole cleaning jig provided with a tube whose one end is connected to a motor and in which a cone is inserted at the center;
A guiding step of guiding the cone into the inside of the vent hole by a guide function of the tube;
And the cleaning step of cleaning the inside of the vent hole by rotating the cone guided into the inside of the vent hole by the rotation of the motor.

  According to the present invention, it is possible to provide a venthole cleaning technique capable of efficiently cleaning the venthole in a short time, even if not a skilled worker.

It is a figure which shows the outline | summary of the vent hole cleaning apparatus based on one embodiment of this invention, (a) is a side view, (b) is a top view. It is an expansion schematic diagram of a robot hand and its neighborhood (robot hand part) in a vent hole cleaning device concerning a 1 embodiment of the present invention. It is a figure which shows a mode that the vent hole cleaning apparatus which concerns on one embodiment of this invention was positioned in the position of a vent hole. It is a figure which shows a mode that the conventional vent hole cleaning apparatus was positioned in the position of a vent hole.

  Hereinafter, the present invention will be described based on the embodiments with reference to the drawings.

1. FIG. 1 is a view showing an outline of a vent hole cleaning device according to an embodiment of the present invention, (a) is a side view, and (b) is a top view. FIG. 2 is an enlarged schematic view of a robot hand of the vent hole cleaning apparatus according to the present embodiment and the vicinity thereof (hereinafter referred to as “robot hand unit”), and FIG. 3 is a vent hole cleaning according to the present embodiment. It is a figure which shows a mode that the apparatus was positioned to the position of a vent hole.

  As shown in FIG. 1, the vent hole cleaning device 1 includes a mounting table 3, an articulated robot 4a, and a robot hand unit 4b connected to the articulated robot 4a. In the robot hand unit 4 b, as shown in FIG. 2, the sensor 5 and the vent hole cleaning jig 10 are attached to the robot hand 11, and the vent hole cleaning jig 10 includes the motor 6, the roller 7 and the cone 8. , Tube 9 is provided.

(1) Vent Hole Cleaning Jig First, the vent hole cleaning jig, which is a characteristic part of the present invention, will be described. As shown in FIG. 2, the cone 8 is disposed through the tube 9, and one end thereof is connected to the motor 6. When the motor 6 is lowered by the rotation of the roller 7 holding the motor 6, the bit 8 is also lowered accordingly, and the tip is gradually inserted into the inside of the vent hole. Thereafter, when the motor 6 is rotated, the inserted cone 8 is rotated to remove the rubber and beads clogged in the vent hole.

  At this time, in the vent hole cleaning apparatus according to the present embodiment, as shown in FIG. 3, the tip of the tube 9 is formed in a convex shape, and the diameter near the diameter of the vent hole 12 is sufficiently large compared to the cone 8. Thus, the tip of the cone 8 can be easily guided from the entrance of the vent hole 12 to the inside in a short period of time efficiently regardless of the skill of the worker.

  Since a normal vent hole is curved and the diameter thereof varies, as shown in FIG. 4, in the conventional vent hole cleaning jig, the cone 18 whose one end is connected to the motor 16 is placed in the vent hole 12 There is a risk that the drill bit 18 may break during insertion into the However, in the vent hole cleaning jig according to the present embodiment, as described above, since the tube 9 provided with the guide function for guiding the bit 8 from the entrance of the vent hole to the inside is used, the bit 8 is broken Can be prevented.

  The cone 8 is not particularly limited as long as it is a metal wire capable of removing rubber and beads clogged in the vent hole, but it is preferable to be made of a piano wire excellent in bending resistance and hard to break. . At this time, the diameter of the cone 8 is preferably about 0.3 to 0.8 mm.

  And in the conventional metal wire pyramid, the cleaning effect was improved by giving a spiral groove processing, but since it is difficult to give such groove processing to a piano wire, the surface is changed to groove processing. Preferably, for example, the surface is fluffed to form a brush-like surface, or a plurality of piano wires are knitted to make it possible to scrape out clogged rubber or beads to improve the cleaning effect.

  As the tube 9, a tube made of metal or a tube coated on the inner side so as not to be worn can be inserted from the viewpoint that the occurrence of breakage of the cone 8 can be appropriately suppressed while the cone 8 can be smoothly inserted. And the like.

(2) Mounting table The mounting table 3 is provided for mounting the mold 2 to be cleaned, and as shown in FIG. 1, it is a circle composed of a plurality of (eight in FIG. 1) split molds. From the viewpoint of efficiently cleaning the annular mold 2, it is preferable to use a rotary table. Although not shown, each split mold is provided with about 100 vent holes as described above.

(3) Multi-Joint Robot The multi-joint robot 4a is provided to position the vent hole cleaning jig in the vent hole, and the robot hand is moved by moving the connected robot hand 4b above the vent hole. The vent hole cleaning jig attached to 11 is positioned. Thus, even a non-skilled worker can reliably position the vent hole cleaning jig in the vent hole. In addition, as a specific articulated robot 4a, a six-axis articulated robot is preferable in that movement similar to human movement is possible.

(4) Sensor The sensor 5 is attached to the robot hand 11, and is provided to observe the surface of the mold 2 to detect the position of the vent hole. Specifically, the position of the vent hole is detected by imaging the surface of the mold 2 and performing image processing. Then, based on the detection result, the control means (not shown) controls the movement of the articulated robot 4a described above, whereby the positioning is performed with higher accuracy than when the operator manually positions the vent hole cleaning jig. Be done. In addition, although the camera provided with 2D sensor or 3D sensor as a specific sensor 5 is preferable, the camera provided with 3D sensor is more preferable in consideration of being able to detect the three-dimensional shape of the mold 2.

  As described above, after the vent hole cleaning device according to the present embodiment moves the vent hole cleaning jig to the position of the vent hole by the articulated robot, it can guide the cone into the vent hole by the guide function of the tube. Since the apparatus is configured as described above, the use of such an apparatus enables efficient cleaning of the vent hole in a short period of time without fail even by a skilled worker.

2. Vent Hole Cleaning Method Next, a method of cleaning a vent hole using the above-described vent hole cleaning device will be described in the order of steps.

(1) Mounting Step First, as shown in FIG. 1, the mold 2 to be cleaned is mounted on the mounting table 3 and fixed.

(2) Positioning Step Next, the vent hole cleaning jig 10 provided with the tube 9 in which the cone 8 whose one end is connected to the motor 6 is inserted in the center is positioned at the position of the vent hole 12.

  Specifically, first, the mold 2 is imaged by the sensor 5 from above the mold 2.

  Image processing is performed on the captured image to detect the position of the vent hole. Then, the detection result is transmitted as a signal to control means (not shown).

  The control means moves the arm portion of the articulated robot 4a and the robot hand portion 4b so that the vent hole cleaning jig 10 is positioned in the detected vent hole 12 based on the transmitted signal of the detection result. , Position the vent hole cleaning jig 10 (see FIG. 3).

(3) Guidance Step Next, the roller 7 is rotated to lower the motor 6. At the same time, the cone 8 inserted into the tube 9 descends and is guided from the inlet of the vent hole to the inside. At this time, as described above, the distal end portion of the tube 9 is formed in a convex shape, and is formed to have a diameter close to the diameter of the vent hole 12 sufficiently larger than the cone 8. Regardless of the problem, the tip of the cone 8 can be easily guided from the inlet of the vent hole 12 to the inside efficiently and in a short time. Further, since the drill 8 is inserted into the tube 9, it is possible to prevent the drill 8 from being broken when guiding the drill 8 to the inside of the vent hole 12.

(4) Cleaning Step Next, the motor 6 is rotated to rotate the cone 8 inserted into the inside of the vent hole. As a result, the rubber stuffed at the time of vulcanization and the beads for shot blasting are removed from the vent holes 12 and the vent holes 12 are cleaned.

(5) Cleaning of all the vent holes When cleaning of the vent holes in one split mold is completed, the mounting table 3 is rotated to change the object of cleaning to another split mold. And each process from said (1) to (4) is repeated. By performing this for all split molds, cleaning of all vent holes in the entire mold is completed.

  In the above, the control means described above controls the function of controlling the vent hole cleaning jig so as to automatically push the cone into the vent hole from the vent hole cleaning jig positioned at the position of the vent hole detected by the sensor. If it is added, the series of steps in cleaning can be automatically advanced, and the vent holes can be cleaned more efficiently.

  As described above, according to the vent hole cleaning method according to the present embodiment, even if you are not a skilled worker, the vent hole can be cleaned efficiently and quickly in a short time, thus saving labor It is possible to greatly reduce the production cost, together with the reduction of the cost caused by the breakage of the cone.

  In addition, since there is no risk of forgetting to clean, it is possible to provide a pneumatic tire of stable quality.

  As mentioned above, although the present invention was explained based on an embodiment, the present invention is not limited to the above-mentioned embodiment. Various modifications can be made to the above embodiment within the same and equivalent scope of the present invention.

DESCRIPTION OF SYMBOLS 1 vent hole cleaning apparatus 2 mold 3 mounting base 4a articulated robot 4b robot hand part 5 sensor 6, 16 motor 7 roller 8, 18 pit 9 tube 10 vent hole cleaning jig 11 robot hand 12 vent hole

Claims (10)

A vent hole cleaning jig for cleaning a vent hole provided in a mold for tire vulcanization, comprising:
A drill which is rotated by the rotation of a motor connected to one end and cleans the inside of the vent hole at the other end;
And a tube through which the cone is inserted at a central portion,
A vent hole cleaning jig characterized in that the tube has a guide function of guiding the cone into the inside of the vent hole.   The vent hole cleaning jig according to claim 1, wherein the cone is made of a piano wire.   The vent hole cleaning jig according to claim 2, wherein the surface of the piano wire is a brush-like surface.   The vent hole cleaning jig according to claim 2 or 3, wherein the awl is a knit of the piano wire. A vent hole cleaning jig according to any one of claims 1 to 4.
A sensor for detecting the position of the vent hole;
A robot hand attached with the sensor and the vent hole cleaning jig;
The robot hand is attached, and the robot further comprises: an articulated robot for positioning the vent hole cleaning jig attached to the robot hand at the position of the vent hole detected by the sensor. Vent hole cleaning device.   The vent hole cleaning apparatus according to claim 5, wherein the sensor is a 2D sensor or a 3D sensor.   The vent hole cleaning jig positioned at the position of the vent hole detected by the sensor is controlled so as to automatically push the cone into the vent hole. The vent hole cleaning device according to claim 1.   The vent hole cleaning apparatus according to any one of claims 5 to 7, wherein the articulated robot is a six-axis articulated robot. A vent hole cleaning method for cleaning a vent hole provided in a mold for tire vulcanization, comprising:
A guiding step of guiding the cone into the inside of the vent hole by a guide function of a tube in which a cone whose one end is connected to a motor is inserted in a central portion;
And a cleaning step of cleaning the inside of the vent hole by rotating the cone guided into the inside of the vent hole by the rotation of the motor. A vent hole cleaning method for cleaning a vent hole provided in a tire vulcanization mold using the vent hole cleaning device according to any one of claims 5 to 8,
Placing the tire vulcanizing mold on a mounting table;
Positioning at a position of the vent hole a vent hole cleaning jig provided with a tube whose one end is connected to a motor and in which a cone is inserted at the center;
A guiding step of guiding the cone into the inside of the vent hole by a guide function of the tube;
And a cleaning step of cleaning the inside of the vent hole by rotating the cone guided into the inside of the vent hole by the rotation of the motor.

Images