JPH01202426A - Supporting device of joint of sheet for tire former - Google Patents

Abstract

PURPOSE:To make it possible to simultaneously fix a joint on the forming drum and both ends on the winding bladders of a sheet by pressure by a method wherein supporting plates advance onto and retract from the winding bladders so as to make flush with the surface of the drum. CONSTITUTION:Before winding a rubber sheet 37, both the right and left sheet joint supporting plates 31 and 32 are positioned above the axis line C of a forming drum 2 by advancing supporting arms 29 and 30 and, after that, brought close to both the ends of the forming drum 2 so as to locate flush with the surface of the forming drum 2 by opposedly moving sliding stands 4 and 5 inwards. Next, when the rubber sheet 37 is wound on the forming drum 2, both the ends of a joint 39 locate on the supporting plates 31 and 32 and the joint 39 is fixed by pressure with a pressing means and, at the same time, the sheet joint supporting plates 31 and 32 are retracted from the interior of the rubber sheet 37 by opposedly moving the sliding stands 4 and 5 outwards and restored to the position of standing by, which does not hinder the tire forming operation, by retracting the supporting arms 29 and 30. Thus, the joint 39 of both the ends of the rubber sheet 37 is automatically fixed and joined by pressure together with the intermediate part by means of mechanical pressing means or the like.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a device for supporting the joints of rubber sheets, etc., wound around a tire-forming drum on a winding bladder in a tire-building machine to assist in joining. .

(Prior Art) Conventionally, as illustrated in FIG. 4, a forming drum in a tire forming machine has winding bladders 41 attached to both ends of a drum 40, and a rubber sheet 42 and the like wound around the drum 40. After being crimped and bonded using a pressure roller, etc., the hoisting bladder
41, both ends of the rubber sheet 42 etc. are rolled up and stacked on the drum 40 and crimped.

Since the outer diameter of the forming drum 40 is larger than the outer diameter of the hoisting bladder 41 and there is a step S, the rubber sheet 4
2 around the forming drum 40 and joining the edges, if the sheet width is wider than the drum width, the part of the rubber sheet 42 that protrudes from the forming drum 40 will be suspended in the air, so the worker is crimped with your fingers.

(Problems to be Solved by the Invention) Since the forming drum 40 of the conventional tire forming machine has the above-described configuration, the joining of both ends of the rubber sheet 42 etc. has to be done manually by an operator. 1. It is very troublesome and takes a considerable amount of time to join. The problem was that productivity was extremely low.

The present invention was devised in view of the above-mentioned circumstances, and its purpose is to wrap a rubber sheet, etc., on the winding bladders on both sides of the forming drum so that they are flush with the forming drum. Position the support plate at
It is an object of the present invention to provide a sheet support device in which a sheet joining portion on a forming drum and both ends on a hoisting bladder can be simultaneously pressed by a pressing means.

(Means for Solving the Problems) In order to achieve the above object, the present invention has taken the following technical means.

That is, the present invention has winding bladders 38 at both ends in the axial direction of the tire building drum 2, and both ends in the circumferential direction of the rubber sheet 370 wound around the drum 2 overlap to form a joint 39. , both ends of the rubber sheet 37 in the axial direction are located on the winding bladder 38, and are inserted into the gap between the inner peripheral surface of the rubber sheet 37 and the outer peripheral surface of the winding bladder 38,
It is a device that supports both ends of the joint part 39 from the inside, and includes a pair of left and right sliding stands 4, 5 that can reciprocate along the drum axis C on the back of the drum 2, and a rain shelter stand 4.5. It consists of a support arm 29.30 that is mounted on the drum and is movable in a direction orthogonal to the drum axis C, and a sheet joint support plate 31.32 that is fixed to the tip of the support arm 29.30. It is characterized in that it enters and leaves the hoisting bladder 38 so as to be substantially flush with the surface of the drum 2.

(Function) According to the present invention, the rubber sheet 37 is attached to the front, and the left and right sheet joint portion support plates 31.32 are attached to the support arms 29.3.
After the molding drum 2 is positioned on the axis C by the advance of the molding drum 2, it approaches both ends of the molding drum 2 and is positioned flush with the surface of the molding drum 2 by moving the sliding tables 4 and 5 inwardly facing each other. .

Next, when the rubber sheet 37 is wrapped around the forming drum 2, both ends of the joint part 39 are located on the support plate 31, 32, and the joint part 39 is pressed by the pressing means, and at the same time, the sheet joint part support The plates 31, 32 are moved out of the rubber seat 37 by the outward movement of the sliding table 4.5, and are returned to the standby position where they do not interfere with the tire forming operation by the retreat of the support arms 29, 30. .

In this way, both end joints 39 of the rubber sheet 37 are automatically pressed and joined together with the intermediate portion by mechanical pressing means or the like.

(Example) Embodiments of the present invention will be described below based on the drawings.

In Figures 1 and 2, ■ is the base of the tire molding machine (
(not shown) is installed parallel to the axis C of the tire forming drum 2, and two guide rails 3 are installed on the upper surface of the tire forming drum 2 along the axis C.
are laid out parallel to each other.

Reference numeral 4.5 denotes a pair of left and right sliding tables, each of which is mounted on the guide rail 3 via a guide shoe 6 on the lower surface, and to which a nut member 7 having an axis on a common axis is fixed. The member 7 has a sliding base drive screw 8.
is screwed in.

The drive screw 8 is provided with a left-handed threaded part 8A and a right-handed threaded part 8B on both the left and right sides, and both ends thereof are rotatably supported on both ends of the base 1 via bearings 9 and in parallel with the guide rail 3. , one end of the screw 8 is connected to a drive motor 11 via a coupling 10, and as the screw 8 is rotated by the motor 11, the slide tables 4 and 5 are reciprocated so as to approach and separate from each other. It will be done.

Reference numerals 12 and 13 denote arm mounting bases, which are mounted on the sliding base 4.5 via a support column 14 and a cylinder device 15, respectively.
The upper ends of the support guide plates 16 and 17, which are parallel to each other and erected in a direction orthogonal to the guide rail 3, have circular arc surfaces 16A and 17 whose centers of curvature are directly below the axis C of the forming drum 2.
A, on the opposite outer surfaces of both support guide plates 16 and 17,
Guide rail 19 having arcuate guide grooves 18 on the upper and lower surfaces
is fixed concentrically with the arcuate surfaces 16A and 17A.

The support column 14 has a flange 20 at its lower end, and a sliding bearing body 2 fixed to the upper end plate of the sliding bases 4 and 5 in a penetrating manner.
The upper end passes through the arm mounting base 12.13 and is fixed with a nut 24 via a cylinder washer 23, and a collar is inserted between the support cylinder 22 and the flange 20. 25 and by replacing the collars 25 with different lengths, it is possible to correspond to the molding drum size.

Further, the cylinder device 15 is fixed to the upper surface of the upper end plate of the sliding bases 4 and 5, and the upper end of the piston rod 26 is fixed to the arm mounting base 12.13.
2.13 is constantly being pushed upwards.

Reference numeral 27 denotes a lock chain, and a curved mounting plate 28 is located below the guide rail 19 and fixed concentrically to the guide rail 19 on the opposite outer surface of the support guide plate 16, 17.
fixed on top.

Reference numerals 29 and 30 denote support arms, each of which has seat joint support plates 31 and 32 fixed to its tips so as to protrude inwardly from each other, and whose base ends are arranged in the upper and lower arcuate guide grooves 18 of the guide rail 19. A guide roller 33 is fixed via a shaft 34, and is guided by an arcuate guide groove 18 of the guide rail 19 to move forward and backward in a direction perpendicular to the axis C of the forming drum 2.

35 is a low reactuator, supporting arm 29°3
A sprocket 36 is fixed to the output shaft which is fixed to the outer surface of the proximal end of the shaft and projects inwardly through the support arm 29.30, and the sprocket 36 meshes with the roke chain 27. As the sprocket 36 rotates, the sprocket 36 moves over the low chain 2f, and the support arm 29
．． 30 moves forward and backward.

The sheet joint support plates 31 and 32 have the same curved surface as the outer peripheral surface of the tire forming drum 2, and can be replaced according to the drum size.

That is, in the embodiment of the present invention, a joint is provided at the intermediate portion of the support arm 29.30, so that the support plate 31.32 can be replaced together with the distal end portion of the support arm 29.30.

Next, the operation of the above embodiment of the present invention will be explained with reference to FIG.
Before winding the support arm 29.3, the row reactor 35 is started to rotate the sprocket 36 and the support arm 29.3 is rotated.
0 forward to position the sheet joint support plate 31.32 directly above the axis C of the forming drum 2, then start the drive motor 11 to rotate the drive screw 8, and move the slide table 4.5 forward. are moved inwardly to approach the edge of the forming drum 2 as much as possible, and are stopped when positioned directly above the hoisting bladders 38 on both sides.

Therefore, a rubber sheet 37 is wrapped around the forming drum 2,
When the joint 39 is located directly above the forming drum 2,
The joining portion 39 is pressed between the forming drum 2 and the support plates 31 and 3 by means of a joining pressing means such as a pressing roller (not shown).
2 to ensure reliable and firm crimping over the entire length of the joint 39.

Simultaneously with the completion of the crimping work on the joint 39, the drive motor 11 is started to rotate in the opposite direction to that described above, the slide tables 4 and 5 are moved away from each other outwardly, and the support plates 31 and 32 are moved away from the rubber sheet 37. The slide table 4.5 stops when it is removed from between the hoisting bladders 38, and then the row reactor 3
5 is rotated in the opposite direction to that described above, and the support arms 29 and 30 are moved back together and returned to the standby position behind the forming drum 2.

The above operations complete one cycle of the operation of the sheet joint support plates 31, 32, and thereafter these operations are repeated for each green tire forming cycle.

Note that the above cycle is automatically performed by the control device according to a program.゛Furthermore, in the present invention, the driving means for the sliding table 4.5, the front end driving means for the support arm 29.30, and the supporting means for the arm mounting base 12.13 are as follows.
The present invention is not limited to the above embodiments.

(Effects of the Invention) As described above, the sheet joint support device for a tire molding machine according to the present invention has the hoisting bladders 38 at both ends of the tire molding drum 2 in the axial direction. Both ends of the rubber sheet 37 in the circumferential direction overlap to form a joint 39.
, both axial ends of the rubber sheet 37 are located on the winding bladder 38, and are inserted into the gap between the inner peripheral surface of the rubber sheet 37 and the outer peripheral surface of the winding bladder 38, It is a device that supports both ends of the joint part 39 from the inside, and includes a pair of left and right sliding stands 4.5 that can reciprocate along the drum axis C on the back of the drum 2, and rain shelter stands 4,5. The support arm 29.30 is mounted on the drum axis C and is movable in a direction perpendicular to the drum axis C. The support arm 29.30 is made up of a support arm 29.30, and sheet joint support plates 31 and 32 are fixed to the tips of the support arm 29.30. 32 enters and leaves the hoisting bladder 38 so as to be substantially flush with the surface of the drum 2, so that the width of the rubber sheet 37 is equal to the width of the forming drum 2. Even if the rubber sheet 37 is wider than the support plate 31.3, both ends of the joint 39 of the rubber sheet 37
Therefore, the pressing means of the rubber sheet joint 39 can securely and firmly bond the rubber sheet together with the forming drum 2, and it can be quickly and automatically crimped, and there is no need for manual pressure bonding as in the past, so it is easy for the operator to press. It is possible to not only reduce fatigue but also stabilize and improve quality and significantly improve productivity.

[Brief explanation of the drawing]

Figures 1 to 3 show embodiments of the present invention; Figure 1 is a partially cutaway rear view, with the left side showing a small diameter drum and the right side showing a large diameter drum; 1 is a left side view of FIG. 1, FIG. 3 is an explanatory diagram of the operation of a sheet joint support plate, and FIG. 4 is a front view showing an example of a conventional tire forming drum. 2... Tire forming drum, 4, 5... Sliding stand, 29
．． 30...Support arm, 31.32...Seat joint support plate, 37...Rubber sheet, 38...Hoisting bladder 139...Joint part, C...Drum axis line. Figure 4Figure 3

Claims (1)

[Claims] (1) A winding bladder 38 is provided at both axial ends of the tire building drum 2, and both circumferential ends of the rubber sheet 37 wound around the drum 2 overlap to form a joint 39;
Both ends of the rubber sheet 37 in the axial direction are winding bladders 38.
A device located above the drum 2 that is inserted into the gap between the inner circumferential surface of the rubber sheet 37 and the outer circumferential surface of the hoisting bladder 38 to support both ends of the joint portion 39 from the inside thereof.
A pair of left and right sliding stands 4, 5 that can be reciprocated along the drum axis C on the back of the drum, and a support arm 29 that is movable in a direction orthogonal to the drum axis C that is mounted on both the sliding stands 4, 5. 30
and sheet joint part support plates 31 and 32 fixed to the tips of the support arms 29 and 30, and the support plates 31 and 32
A sheet joint support device for a tire molding machine, characterized in that the sheet joint portion support device for a tire molding machine is configured to enter onto and retreat from the hoisting bladder 38 so as to be substantially flush with the surface of the drum 2.