JP2017127987A - Transportation system for rigid core - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide transportation system for a rigid core, with which, in producing step of a pneumatic tire, upon transportation of a rigid core by an unmanned transportation cart, it is stopped at a predetermined stop position at a high accuracy so that the rigid core may be delivered without generation of axial shift.SOLUTION: There is provided transportation system for a rigid core, which comprises: an unmanned transportation cart comprising a bracket and a clamp target part and transporting the rigid core; a positioning stopper comprising a shock absorber with which the bracket of the unmanned transportation cart collides when the unmanned transportation cart reaches a stop position so as to stop the unmanned transportation cart and which absorbs impact onto the unmanned transportation cart upon stopping the unmanned transportation cart; a sensor generating a detecting signal when the bracket of the unmanned transportation cart collides with the shock absorber; a clamp mechanism fitting onto the clamp target part of the unmanned transportation cart so as to center the unmanned transportation cart; and a controlling part controlling carrying out control to stop a driving motor of the unmanned transportation cart when the sensor generates the detecting signal.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a rigid core conveying system for conveying a rigid core in a manufacturing process of a pneumatic tire.

  In recent years, tire components such as inner liners, carcass plies, belt plies, sidewall rubber, and tread rubber are sequentially pasted on the outer surface of a rigid core using a rigid core in order to increase the molding accuracy of the tire. Core molding for forming a green tire is performed (for example, Patent Document 1).

  Specifically, after the assembled rigid core is placed on the transport vehicle, the operator sequentially transports the above-described tire constituent members to the pasting equipment for pasting each of the tire constituent members, and the rigid core is pasted to the transport vehicle. The green tires are sequentially molded by passing them to and from the mounting equipment, and the green tires that have been molded are then transported to the vulcanizer.

JP 2014-69560 A

  However, it is not easy for an operator to transport a rigid core having a weight of 300 kg to the above-described facilities, which places a heavy burden on the operator.

  Therefore, the present inventor considered using an automatic guided vehicle instead of the transfer by an operator, but it is assumed that the automatic guided vehicle used conventionally transports a small weight. Therefore, even if it is going to stop the transportation vehicle on which the heavy weight rigid core is placed at the equipment in each process, it is difficult to stop with high accuracy due to the inertia, and it is delivered to the equipment so that the misalignment does not occur. It was not easy. If each tire constituent member is affixed to the rigid core in a state where core misalignment has occurred, there is a risk that the raw tire cannot be accurately molded.

  Therefore, the present inventor made the automatic guided vehicle run at an ultra-low speed, or attached a regenerative brake provided with a motor brake to the drive motor of the automatic guided vehicle, or performed servo control, and embedded in the road surface. An attempt was made to recognize a stop tag (such as a magnetic stop marker or an RFID tag) with high accuracy and to stop at a predetermined stop position with high accuracy, but it is still not sufficient.

  Therefore, in the manufacturing process of the pneumatic tire, when the rigid core is transported by the automatic guided vehicle, the present invention allows the rigid core to be accurately stopped at a predetermined stop position without causing the core misalignment. It is an object of the present invention to provide a rigid core conveyance system that can be used.

The invention described in claim 1
In a pneumatic tire manufacturing process, a rigid core transport system that transports a rigid core by an automatic guided vehicle and stops the automatic guided vehicle at a predetermined stop position of a production line,
An automatic guided vehicle that has brackets attached to the front and rear of the traveling direction and clamped parts attached to both the left and right sides of the traveling direction;
When the automatic guided vehicle is provided at the stop position and the automatic guided vehicle collides with the bracket when the automatic guided vehicle arrives at the stop position, the automatic guided vehicle is stopped, and the automatic guided vehicle is stopped. A positioning stopper having a shock absorber for absorbing an impact applied to the automatic guided vehicle;
A sensor that generates a detection signal when a bracket of the automatic guided vehicle collides with the shock absorber and the shock absorber contracts;
A clamp mechanism that is provided at a stop position of the automatic guided vehicle and has a clamp that performs centering of the automatic guided vehicle by fitting with the clamped portion of the automatic guided vehicle;
A control unit that controls to stop the drive motor of the automatic guided vehicle by wirelessly transmitting a drive motor stop signal to the automatic guided vehicle when the sensor generates the detection signal. This is a rigid core conveyance system.

The invention described in claim 2
2. The rigid core transport system according to claim 1, wherein the positioning stopper is provided in each of the facilities of the production line that transfers the rigid core placed on the automatic guided vehicle. It is.

The invention according to claim 3
The rigid core transport system according to claim 1, wherein the sensor is embedded in the shock absorber.

The invention according to claim 4
4. The rigid core transport system according to claim 3, wherein the sensor is a pressure sensor that generates a detection signal by detecting a pressure when the shock absorber contracts.

The invention described in claim 5
An automatic guided vehicle used in the rigid core conveyance system according to any one of claims 1 to 4,
Brackets attached to the front and back in the direction of travel;
With clamped parts attached to the left and right sides of the direction of travel,
An automatic guided vehicle transports a rigid core.

The invention described in claim 6
A positioning stopper used in the rigid core conveyance system according to any one of claims 1 to 4,
Equipped with a shock absorber that absorbs the shock applied to the automated guided vehicle when stopping the automated guided vehicle.
The positioning stopper is characterized in that when the automatic guided vehicle reaches the stop position, the bracket of the automatic guided vehicle collides to stop the automatic guided vehicle.

The invention described in claim 7
The positioning stopper according to claim 6, further comprising a sensor embedded in the shock absorber.

The invention according to claim 8 provides:
A clamp mechanism used in the rigid core conveyance system according to any one of claims 1 to 4,
A clamp mechanism comprising a clamp for centering the automatic guided vehicle by fitting with a clamped portion of the automatic guided vehicle.

The invention according to claim 9 is:
A control unit used in the rigid core transport system according to any one of claims 1 to 4,
A control unit comprising control means for performing control to stop the drive motor of the automatic guided vehicle by wirelessly transmitting a drive motor stop signal to the automatic guided vehicle when the sensor generates a detection signal It is.

The invention according to claim 10 is:
A safety device for an automatic guided vehicle used in the rigid core conveyance system according to any one of claims 1 to 4,
An area sensor that is provided between the entrance and exit of the stop position of the equipment of the automatic guided vehicle, and that detects that the automatic guided vehicle has entered the entrance and has exited from the exit;
A safety device for an automatic guided vehicle comprising: a light curtain that generates an emergency stop signal and stops the automatic guided vehicle when an emergency stop occurs on the facility side.

  According to the present invention, in the pneumatic tire manufacturing process, when the rigid core is transported by the automatic guided vehicle, the rigid core is stopped at a predetermined stop position with high accuracy, and the rigid core is transferred without causing a misalignment. It is possible to provide a rigid core conveyance system that can be used.

It is a perspective view in the stop position of the automatic guided vehicle of the rigid core conveying system in the embodiment of the present invention. It is the figure in the stop position of the automatic guided vehicle of the rigid core conveyance system in embodiment of this invention, Comprising: (a) is the figure seen from the front, (b) is the figure seen from the side. It is a top view in the stop position of the automatic guided vehicle of the rigid core conveying system in the embodiment of the present invention, where (a) is a view after the automatic guided vehicle is stopped, and (b) is before the automatic guided vehicle is stopped. FIG. It is a top view explaining the manufacturing line in which the conveyance system of the rigid core in embodiment of this invention was provided.

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

1. Outline of rigid core transport system according to the present embodiment The rigid core transport system according to the present embodiment includes an automatic guided vehicle, a positioning stopper, a sensor, a clamp mechanism, and a control unit. Yes.

  According to the rigid core conveyance system according to the present embodiment, when the automatic guided vehicle reaches the stop position, the bracket of the automatic guided vehicle collides with the positioning stopper. At this time, conventionally, it has been difficult to stop the automatic guided vehicle that transports a heavy weight rigid core at an accurate position.

  However, in this embodiment, the shock absorber softens the impact when the bracket of the automatic guided vehicle collides with the positioning stopper. Furthermore, the sensor generates a detection signal when the shock absorber contracts, and the control unit drives the automatic guided vehicle by wirelessly transmitting a drive motor stop signal to the automatic guided vehicle when the sensor generates a detection signal. Control to stop the motor. In addition, the clamping mechanism performs centering of the automatic guided vehicle by fitting with the clamped portion of the automatic guided vehicle.

  For this reason, in the pneumatic tire manufacturing process, when the rigid core is transported by the automatic guided vehicle, the rigid core can be transferred to the predetermined stop position with high accuracy without causing misalignment.

2. About Each Part of the Rigid Core Transport System Hereinafter, each part of the rigid core transport system in the present embodiment will be described in detail.

  FIG. 1 is a perspective view at a stop position of an automatic guided vehicle in a rigid core transport system according to an embodiment of the present invention, and FIG. 2 is an automatic guided vehicle of the rigid core transport system according to an embodiment of the present invention. FIGS. 3A and 3B are views at the stop position, where FIG. 3A is a view from the front, FIG. 3B is a view from the side, and FIG. 3 is an automatic guided vehicle of the rigid core transfer system according to the embodiment of the present invention; It is a top view in the stop position of this, Comprising: (a) is a figure after a stop of an automatic guided vehicle, (b) is a figure before the automatic guided vehicle stops.

(1) Automated guided vehicle As shown in FIG. 1, the automated guided vehicle 1 is a device that transports a rigid core, and is attached to brackets 11 that are attached to the front and rear of the traveling direction, and to both the left and right sides of the traveling direction. The clamped part 12 is provided.

  And the automatic guided vehicle 1 has the mounting part 2 which mounts and mounts a rigid core, and as shown in FIG. 2, by carrying out operation control (control by PLC) using a radio device, The vehicle stops at a predetermined stop position in each facility of the production line, and the rigid core is transferred between the automatic guided vehicle 1 and the tire component members, the vulcanizer loader device, and the like.

Specifically, the bracket 11 (FIG. 2) is attached to the front side and the rear side of the automatic guided vehicle 1, and the clamped portion 12 (FIG. 1) is disposed along the back side of the front and rear brackets 11. It is attached to the left and right sides of the bracket 11, that is, the left and right sides of the automatic guided vehicle 1 in the traveling direction. In FIG. 2, 52 is an embedded stop tag, and 53 is an RFID receiver.

  Note that the bracket 11 is subjected to nitriding treatment (surface hardening treatment) for strengthening a surface that is rubbed when colliding with a positioning stopper described later, and is subjected to a lightening process for weight reduction. preferable.

(2) Positioning stopper As shown in FIG. 3B, the positioning stopper 3 includes a shock absorber 31 that absorbs an impact applied to the automatic guided vehicle 1 when the automatic guided vehicle 1 is stopped. The positioning stopper 3 is provided at the stop position, and when the automatic guided vehicle 1 arrives at the stop position, the bracket 11 of the automatic guided vehicle 1 collides to stop the automatic guided vehicle 1. At this time, when the shock absorber 31 stops the automatic guided vehicle 1, the shock applied to the automatic guided vehicle 1 is absorbed.

  Specifically, as shown in FIG. 3, when the automatic guided vehicle 1 arrives at the stop position and the bracket 11 of the automatic guided vehicle 1 collides with the positioning stopper 3, the shock absorber 31 contracts to contract the automatic guided vehicle. Even when the impact applied to 1 is absorbed and the rigid core, which is a heavy object, is stopped, it is possible to sufficiently prevent the occurrence of deviation of the stop position due to inertia.

(3) Sensor As shown in FIG. 3B, the sensor 32 is embedded in the shock absorber 31 of the positioning stopper 3, and the bracket 11 of the automatic guided vehicle 1 collides with the positioning stopper 3, so that the shock absorber 31 is The sensor 32 transmits a detection signal when contracted. As the sensor 32, it is preferable to use a pressure sensor from the viewpoint that the contraction of the shock absorber 31 can be easily detected.

(4) Clamp mechanism As shown in FIGS. 1 and 3, the clamp mechanism 34 is provided at the stop position of the automatic guided vehicle 1, and is engaged with the clamped portion 12 of the automatic guided vehicle 1 to perform the automatic transfer. A clamp 33 for centering the vehicle 1 is provided.

(5) Control unit The control unit (not shown) performs control to stop the drive motor of the automatic guided vehicle by wirelessly transmitting a drive motor stop signal to the automatic guided vehicle when the sensor generates a detection signal. Control means are provided.

3. Rigid Core Transport Method Using Rigid Core Transport System Next, a rigid core transport method using the above-configured rigid core transport system will be described.

  When the automatic guided vehicle 1 transporting the rigid core arrives at the stop position, the bracket 11 of the automatic guided vehicle 1 collides with the positioning stopper (FIG. 3). At this time, the shock absorber 31 of the positioning stopper 3 contracts to absorb the impact applied to the automatic guided vehicle 1.

  When the sensor 32 (FIG. 3B) detects the contraction of the shock absorber 31, a detection signal is transmitted.

  The control unit performs a control to stop the drive motor of the automatic guided vehicle 1 by transmitting a drive motor stop signal wirelessly to the automatic guided vehicle 1 in accordance with the transmission of the detection signal from the sensor 32.

  When the drive motor stops and the automatic guided vehicle 1 stops at the stop position, the clamp mechanism 34 (FIG. 3) is operated, and the clamps 33 (FIG. 1) on both the left and right sides of the stop position are the front side or the rear side of the automatic guided vehicle 1. The automatic guided vehicle 1 is centered by fitting with the clamped portions 12 (FIG. 1) on both the left and right sides.

  Thereby, even when the rigid core, which is a heavy object, is stopped, it is possible to sufficiently prevent the stop position from being shifted due to inertia.

4). In the present embodiment, the automatic guided vehicle is preferably provided with an emergency safety device. FIG. 4 is a plan view for explaining a production line provided with a rigid core conveyance system according to the present embodiment. As shown in FIG. 4, the safety device for the automatic guided vehicle is provided between the entrance and the exit of the stop position of the equipment of the automatic guided vehicle 1. And an area sensor (not shown) for detecting that the vehicle has left the vehicle, and a light curtain 4 for stopping the automatic guided vehicle by generating an emergency stop signal at the time of emergency stop on the facility side. Then, the emergency stop on the facility side causes the light curtain 4 to generate an emergency stop signal to stop the automatic guided vehicle 1. In addition, the code | symbol 41 in FIG. 4 is a vulcanizer, 42 is a cooler, 43 is a preheater.

  Thereby, the safety | security aspect at the entrance conveyance of an installation can also be improved. That is, when the automatic guided vehicle 1 enters the facility, the vehicle travels in a very narrow area. At this time, a safety scanner sensor (not shown) provided before and after the automatic guided vehicle 1 is installed. It is temporarily turned off to prevent malfunction. As a result, only the positioning device is effective in the automatic guided vehicle. However, the automatic guided vehicle 1 is regarded as a part of the equipment after the automatic guided vehicle 1 enters the equipment, and the automatic guided vehicle 1 is used when the equipment is in an emergency stop. It is possible to stop running.

5. Advantages of the present embodiment (1) Rigid core transport system (a) A shock absorber is provided in order to increase the stopping accuracy of heavy material transport, and the inertia of the unmanned transport vehicle is large due to the weight of the rigid core. Even if force is applied, the inertial force can be absorbed to improve the positioning accuracy when the automatic guided vehicle is stopped.

(B) And when the automatic guided vehicle stops at the stop position, the clamping mechanism performs centering of the automatic guided vehicle by fitting with the clamped portion of the automatic guided vehicle. For example, the positioning accuracy of front and rear and left and right can be set within 0.2 mm, and the rigid core delivery accuracy of the vulcanizer loader device and the automatic guided vehicle can be set within 0.5 mm.

(2) Safety device for automatic guided vehicle Since the automatic guided vehicle can be stopped immediately even in the case of an emergency stop of the equipment, the safety aspect of the incoming transport of the equipment can also be improved.

  While the present invention has been described based on the embodiments, the present invention is not limited to the above embodiments. Various modifications can be made to the above-described embodiments within the same and equivalent scope as the present invention.

DESCRIPTION OF SYMBOLS 1 Automatic guided vehicle 2 Mounting part 3 Positioning stopper 4 Light curtain 11 Bracket 12 Clamped part 31 Shock absorber 32 Sensor 33 Clamp 34 Clamp mechanism 41 Vulcanizer 42 Cooler 43 Preheater 52 Embedded stop tag 53 RFID receiver

Claims (10)

In a pneumatic tire manufacturing process, a rigid core transport system that transports a rigid core by an automatic guided vehicle and stops the automatic guided vehicle at a predetermined stop position of a production line,
An automatic guided vehicle that has brackets attached to the front and rear of the traveling direction and clamped parts attached to both the left and right sides of the traveling direction;
When the automatic guided vehicle is provided at the stop position and the automatic guided vehicle collides with the bracket when the automatic guided vehicle arrives at the stop position, the automatic guided vehicle is stopped, and the automatic guided vehicle is stopped. A positioning stopper having a shock absorber for absorbing an impact applied to the automatic guided vehicle;
A sensor that generates a detection signal when a bracket of the automatic guided vehicle collides with the shock absorber and the shock absorber contracts;
A clamp mechanism that is provided at a stop position of the automatic guided vehicle and has a clamp that performs centering of the automatic guided vehicle by fitting with the clamped portion of the automatic guided vehicle;
A control unit that controls to stop the drive motor of the automatic guided vehicle by wirelessly transmitting a drive motor stop signal to the automatic guided vehicle when the sensor generates the detection signal. A rigid core transport system.   2. The rigid core transport system according to claim 1, wherein the positioning stopper is provided in each of the facilities of the production line that transfers the rigid core placed on the automatic guided vehicle. .   The rigid core transport system according to claim 1, wherein the sensor is embedded in the shock absorber.   4. The rigid core transport system according to claim 3, wherein the sensor is a pressure sensor that generates a detection signal by detecting a pressure when the shock absorber contracts. An automatic guided vehicle used in the rigid core conveyance system according to any one of claims 1 to 4,
Brackets attached to the front and back in the direction of travel;
With clamped parts attached to the left and right sides of the direction of travel,
An automatic guided vehicle that transports a rigid core. A positioning stopper used in the rigid core conveyance system according to any one of claims 1 to 4,
Equipped with a shock absorber that absorbs the shock applied to the automated guided vehicle when stopping the automated guided vehicle.
A positioning stopper, wherein when the automatic guided vehicle arrives at the stop position, the bracket of the automatic guided vehicle collides to stop the automatic guided vehicle.   The positioning stopper according to claim 6, further comprising a sensor embedded in the shock absorber. A clamp mechanism used in the rigid core conveyance system according to any one of claims 1 to 4,
A clamp mechanism comprising a clamp for centering the automatic guided vehicle by fitting with a clamped portion of the automatic guided vehicle. A control unit used in the rigid core transport system according to any one of claims 1 to 4,
A control unit comprising control means for performing control to stop the drive motor of the automatic guided vehicle by wirelessly transmitting a drive motor stop signal to the automatic guided vehicle when the sensor generates a detection signal . A safety device for an automatic guided vehicle used in the rigid core conveyance system according to any one of claims 1 to 4,
An area sensor that is provided between the entrance and exit of the stop position of the equipment of the automatic guided vehicle, and that detects that the automatic guided vehicle has entered the entrance and has exited from the exit;
A safety device for an automatic guided vehicle, comprising: a light curtain that generates an emergency stop signal and stops the automatic guided vehicle during an emergency stop on the facility side.

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