JPS5926242A - Feeder for tread breaker band and the like - Google Patents

Abstract

PURPOSE:To obtain high-speed reciprocal movement and stoppage accuracy by a method in which a holder for tread breaker band, etc., is fed with high speeds until just before each station by a multiple feeding thread screw and thereafter is contacted with a stopper in the molding of a tire. CONSTITUTION:A transfer ring 3 is stopped by the stopper 21 of a band molding station A, and a tread breaker band 1 on a molding drum is held by the expansion of an air bag 5. A feed screw 2 is normally turned by a motor 21 and the transfer ring 3 is reciprocally moved with high speeds, comes into contact with a detection switch 26, and stopped. The feed screw 2 is slightly moved by the cylinder 18, contacted with the stopper 22, and stopped exactly at a fitting station B. A breaker band 1 is fitted to the case by the contraction of the air bag 5 and the expansion of the molding drum. The return of the screw 2 to the molding station A is likewise made. High-speed reciprocal movement and high stoppage accuracy of holder can thus be obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to improvements in transfer devices such as tread breaker bands.

Conventionally, in the tire molding method where the station for molding the tread breaker band and the station for fitting the tread breaker band to the case part were separated, the transfer ring (holding member) of the tread breaker band was screwed together. By rotating the feed screw in the forward and reverse directions, the transfer ring is reciprocated between the tread breaker band forming station on one side in the axial direction and the fitting station on the other side, thereby forming the tread breaker band. A transfer device has been put into practical use that is configured to transfer objects and stop when a stop signal is issued by a limit switch or the like.

However, since the conventional transfer device described above has a single feed screw, it is necessary to increase the rotational speed of the feed screw in order to increase the transfer speed, which may cause shaft runout.

Additionally, in the transfer ring, a limit switch was turned on before each station, and this detection signal was used to stop the feed screw motor, resulting in extremely poor stopping accuracy.

Furthermore, although it is possible to use a ring as a means of moving the transfer ring, in many cases it cannot be used in practice because the movement stroke of the cylinder is limited to about 1000 mm.

The present invention has been made in view of the above-mentioned conventional problems.
Basically, by using a multi-start threaded feed screw, the desired feed speed of the holding member can be obtained even if the rotation speed of the feed screw is lowered, and the Stop the feed screw motor using the detection switch,
After that, the holding member is moved by a cylinder and stopped by a stopper, thereby improving the stopping accuracy.

Embodiments of the invention will now be described in detail with reference to the accompanying drawings.

As shown in FIG. 1, the tread breaker 1 transfer device moves between the forming station 8 of the tread breaker band 1 and the fitting station 13 of the tread breaker band 1 in the axial direction by 20 rotations of the feed screw. Transferring (holding part removal) 3
(iii) The transfer ring 3 has a female threaded boss 4 that is screwed into the feed screw 2, and has a tread.
It has an air bag 5 that detachably holds the outer periphery of the breaker band 1.

The feed screw 2 is formed with, for example, eight threads, and the lead (feed -) of the l/transfer ring 3 per revolution of the feed screw 2 is large (for example, 45°). Even if the rotational speed of the feed screw 2 is lowered, a predetermined feed speed can be obtained, and the screw efficiency is high at 075 compared to a normal screw 03, so the drive motor of the feed screw 2 (described later) is used to prevent runout and oil. ) capacity can be halved.

A key 6 is fitted into the shaft part "2a" at one end of the feed screw 2, and the shaft part 2a is slidably and co-rotatably fitted into the bearing part 8 of the key groove 7 and supported. At the same time, the bearing member 8 is rotatably supported by a machine frame 10 via a bearing 9. A chain wheel 11 is fixed to the bearing member 8, and a chain wheel 13 of an electric motor 12 with a brake is attached to the bearing member 8. An endless chain 14 is stretched, and the feed screw 2 is rotated in forward and reverse directions through the chain 14, the bearing member 8, and the key 6 by driving the motor 12.

A bearing 1 is attached to the shaft portion 2b on the other end side of the feed screw 2.
A bearing member 16 is fitted through the shaft 5, and the bearing member 16 is fastened to the shaft portion 21) with a nut 17 to support it in a non-removable (sliding) and rotatable manner, and the bearing portion 16 has a small stroke. Bitten rod 19 of the positioning cylinder 18
The feed screw 2 is connected to the feed screw 2 by a pin 20, and the feed screw 2 is moved back and forth by the operation of the C1 cylinder 18.

Transferring 3 above to band forming station A
Stoppers 21 and 22 are provided on the machine frame 10, respectively, for accurately abutting the fitting station B and the fitting station B.

The stoppers 21.22 are threadedly connected to brackets l-23 and 23 erected on the machine frame 10, and are screwed onto double nuts 24.2.
4 allows for position adjustment.

Furthermore, detection switches 25 and 26 are provided in the machine frame 10, respectively, to be activated before each station A, 11 by being turned off by the transfer ring 3 during reciprocating movement.

The distance t is set to approximately (a)% of the stroke of the cylinder 18.

As shown in FIG. 2, the detection switches 25 and 26 are as follows:
It is connected to the control circuit 27 and controls the motor 12 to be stopped and the cylinder 18 to be operated in the opposite direction when each detection switch 25, 26 is activated.

If the transfer device is configured as described above, the transfer ring 3 is brought into contact with the band forming station by the stopper 21, and stopped in a state surrounding the tread breaker band forming drum (f in the figure). The expansion of the air bag 5 holds the tread breaker band 1 on the forming drum, and the forming drum contracts in diameter.Then, the motor 12 is driven, the feed screw 2 rotates forward, and the transfer ring 3 moves forward at a fast speed. detected switch 26
When the motor 12 is turned on, the motor 12 stops and the transfer ring 3 stops.

Thereafter, the feed screw 2 is moved forward a little further by the operation of the cylinder 18, and the transfer ring 3 is stopped against the stopper 22 and accurately stopped at the fitting station B.
It comes into a state that surrounds the case portion of the forming drum (not shown).

Then, the tread breaker band 1 is fitted to the case portion by deflation of the air bag 5 and expansion of the forming drum.

After the fitting is completed, the motor 12 is driven, the feed screw 2 is rotated in the reverse direction, and the transfer ring 3 is moved back at a high speed, and when the detection switch 25 is turned on, the motor 12 is stopped and the transfer ring 3 is stopped.

Thereafter, the feed screw 2 is moved back a little further by the operation of the cylinder 18, and the transfer ring 3 is brought into contact with the stopper 21 and accurately stopped at the band forming station 8.

Then, as described above, the tread breaker band 1 is held by the expansion of the air bag 5, and the transfer cycle is repeated.

As is clear from the above description, the present invention involves reciprocating the holding part using a multi-thread feed screw at a high speed to the front of each station, and moving the holding part using a cylinder from the front of each station. Since the holding member is reciprocated until it stops against the stopper, the holding member can be reciprocated quickly and the holding member can be stopped accurately.

Furthermore, since the rotational speed of the feed screw can be lowered, shaft vibration and oil splashing can also be prevented.

Note that this device can also be applied to the transfer of tread bands or breaker bands alone.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a tread breaker band transfer device, and FIG. 2 is a control circuit diagram. 1...Tread breaker band, 2...Feed screw, 3...Transfer ring, 6...Key, 8...
・Bearing member, 10...Machine frame, 12...Motor, 16
...Bearing member, 18...Cylinder, 21.22...
・Stock horns, 25° 26...Detection switch, 27・
・・Control circuit, A・Passing is done at molding station, B・
...Fitting station. Patent applicant: Sumitomo Rubber Industries Co., Ltd. Representative: Mr. Osamu Aoyama, et al. 2 Procedural amendments (voluntary) 1. Indication of the case 1980 Patent Application No. 136950 2. Title of invention Tread 3. Case of person making an amendment Relationship with Patent Applicant 46 Agent Address 7, Kokugi Building, 2-10 Honmachi, Higashi-ku, Osaka-shi, Osaka Prefecture;
The Detailed Description of the Invention column in the Description of Contents of the Amendment is corrected as follows. (1) Delete the phrase ``Using the feed screw'' on page 3, line 11. (2) On page 8, line 19, after ``Applicable.'', ``In addition, this device may be used in other machines other than tire molding machines.''
Of course, it can be applied to parts that require long-distance movement and accurate stopping. ” is inserted. that's all

Claims (1)

[Claims] (1) By rotating forward and reverse a feed screw to which a holding member such as a tread breaker band is screwed, the holding member is reciprocated between a station on one side and a station on the other side in the axial direction. In the transfer device, the feed screw is formed into a multi-thread screw, one end of the feed screw is slidably and co-rotatably supported by a bearing member that interlocks with each other, and the feed screw is While the other end is supported by the bearing member of the positioning cylinder so that it can rotate without sliding, it is also provided with a stopper that stops the reciprocating movement of the holding member at each station. A tread breaker band, etc., characterized in that it is provided with a detection switch that is operated in front of each detection switch, and is also provided with a control circuit that stops the motor and operates the cylinder in the corresponding direction △ when each detection switch is activated. Transfer equipment.