JPH06293089A - Band grasping device of tire molding machine using steel carcass - Google Patents

Abstract

PURPOSE:To provide a band grasping device steplessly adjusted in size corresponding to a tire size, and favorable in the band delivery accuracy to a first drum. CONSTITUTION:A band grasping device is equipped with a plurality of band grasping holders 1 arranged in a cylindrical form and having permanent magnets 1a provided to the inner surfaces thereof, the brackets 2 provided to the outer surfaces of the band grasping holders 1 so as to protrude in radial directions, the slide blocks 7 fixed to the brackets 2 so as to be positionally adjustable in the radial directions, an annular fixed frame supporting the slide blocks 7 so as to be capable of sliding them in the radial directions and the mechanism attached to the annular fixed frame to reciprocally move the slide blocks 7 in the radial directions at the same time.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a band gripping device for a tire forming machine using a steel carcass material.

[0002]

2. Description of the Related Art As shown in FIGS. 7 and 8, a plurality of band holding holders 51 having permanent magnets are attached to left and right brackets 52, and these brackets 52 are attached to a base plate 53. The linear motion bearing 55 is attached to the base plate 53, and the guide rod 5
The left and right brackets 52 are opened and closed laterally on the upper side of the rack 6 through the rack 58 and the pinion 57 by using the air cylinder 54 as a drive source.

As shown in FIG. 9, when the bracket 52 is closed and the band drum 60 is reduced in diameter, the band holding holder 51 holds the band 61. However, since there is no magnet above and below the band 61, The upper and lower ends are gripped in a deformed state. When the size is changed, the bolt 59 is removed, and the bracket 52 including the band holding holder 51 is removed from the base plate 53 for conversion.

[0004]

The above-mentioned prior art has the following problems. (1) When changing the tire size, it is necessary to change the position of the band gripping holder to a diameter that matches the size, but since there was no adjustment mechanism for it, the band gripping holder and the bracket were replaced for each size. Therefore, it is necessary to prepare a band holding holder and a bracket of each size. (2) Since the band is gripped from the lateral direction, the band is deformed when the band is gripped, and the delivery accuracy to the 1st drum is poor.

The present invention solves the above-mentioned problems in the prior art, and provides a band gripping device capable of stepless size adjustment corresponding to the tire size and having good band delivery accuracy for the 1st drum. The purpose is.

[0006]

Means for Solving the Problems (1) A plurality of divided band grip holders are attached to the inner circumference of an annular fixed frame, and the band grip holders are movable in the radial direction. The specific structure is as follows. (A) A slide block is mounted on a radial bracket that supports the band holding holder, and a radial guide groove that guides the slide block is provided on the annular fixed frame.

(B) A rotary plate having a long groove for a guide roller inclined with respect to the radial direction is rotatably mounted on an annular fixed frame, and a guide roller is mounted on a slide block. Insert into the long groove of. (2) In order to make the size adjustable steplessly, the bracket of the band holding holder is provided with an elongated hole in the radial direction, and the bracket is fixed to the slide block through the elongated hole.

[0008]

[Operation] By rotating the rotary plate in one direction by a predetermined angle, the guide roller of the slide block moves in the long groove of the rotary plate, and the slide block moves the radial guide groove of the annular fixed frame in the center direction of the frame. Slide to close the band grip holder.

The band grip holder is opened by rotating the rotary plate in the opposite direction. When changing the tire size, loosen the bolt between the bracket of the band grip holder and the slide block and use the long hole of the bracket to set the bracket to the slide block so that the diameter is appropriate.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described with reference to FIGS. A plurality of cylindrical band-holding holders 1 each having a permanent magnet 1a mounted inside are attached to the inner end of a bracket 2, and further, the bracket 2 is attached to a slide block 7 that slides in the radial direction. Slide block 7
The cam follower 3 that engages with the long groove 18 formed in the rotary plate 5 is pivotally supported. The rotating plate 5 is an annular fixed frame 6
The slide block 7 is supported by the cover plate 4 while maintaining a rotatable clearance, and the slide block 7 is guided to the left and right by a radial guide rail 11 provided on the annular fixed frame 6. By connecting the left and right rotating plates 5 with the connecting rod 13, and rotating the rotating plate 5 in one direction by using the air cylinder 12 as a drive source,
The cam follower 3 moves in the long groove 18 of the rotary plate 5, the slide block 7 slides along the guide rail 11 toward the center of the annular fixed frame 6 in the radial direction, and each band holding holder 1 contracts in diameter. .

By rotating the rotating plate 5 in the opposite direction, the diameter of the band grip holder 1 is expanded. When setting the holder diameter, loosen the stopper lock nut 15, set the screw-type closed stopper 14 to the set value, and lock with the stopper lock nut 15. When changing the tire size, loosen the mounting bolt 9 between the bracket 2 and the slide block 7, and use the elongated hole 2a of the bracket 2 to use the bracket guide rail 10 as a guide and the bracket moving nut 8
The bracket 2 is set to an appropriate diameter by and the nut 8 and the bolt 9 are locked.

As shown in FIG. 6, the band holding holder 1 can be reduced in diameter, the band drum 16 can be closed, and the band holding holder 1 can hold the band 17 in a perfect circle.

[0013]

The band gripping device in the tire forming machine using the steel carcass according to the present invention has a plurality of band gripping holders arranged in a cylindrical shape and having permanent magnets mounted on the inner surface thereof, and a radial outer surface of each of the band gripping holders. Direction brackets, slide blocks fixed to the brackets, an annular fixing frame that slidably supports the slide blocks in the radial direction, and the slide blocks attached to the annular fixing frame. The following effects are obtained by including a mechanism for simultaneously reciprocating in the radial direction.

The band on the band drum can be adsorbed and held by the band holding holder over the entire circumference of the band. Therefore, the band received from the band drum for 1s
The accuracy when delivering to the t-drum is improved. Also, by fixing the slide block to each bracket so that the radial position can be adjusted, the diameter reduction position of the band grip holder can be adjusted steplessly, and one type of band gripping device can be used for each size band. can do.

[Brief description of drawings]

FIG. 1 is a front view of a band gripping device according to an embodiment of the present invention.

FIG. 2 is a side view of FIG.

FIG. 3 is an enlarged view of a band holding holder portion of FIG. 1.

FIG. 4 is a side view of FIG.

FIG. 5 is a plan view of FIG.

6 is a drawing similar to FIG. 1 in a reduced diameter position of the band gripping holder.

FIG. 7 is a side view of a conventional band gripping device.

8 is a front view of FIG. 7. FIG.

9 is a drawing similar to FIG. 8 in a reduced diameter position of the band gripping holder.

[Explanation of symbols]

 1 band grip holder 1a permanent magnet 2 bracket 2a oblong hole 5 rotating plate 6 annular fixed frame 7 slide block 11 guide rail 18 long groove

Claims (1)

[Claims] 1. A plurality of band-holding holders arranged in a cylindrical shape and having permanent magnets mounted on their inner surfaces, a bracket projecting radially from the outer surface of each band-holding holder, and a radial position on each bracket. An adjustable fixed slide block, an annular fixed frame that slidably supports each slide block in a radial direction, and a mechanism attached to the annular fixed frame to reciprocally move each slide block in the radial direction at the same time. A band gripping device for a tire forming machine using a steel carcass, which comprises: