JP3217455B2 - Turning device of tire constituent material in tire building machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for turning back tire constituent materials in a tire forming machine, and more particularly to a tire forming material for a tire forming machine which has a simple structure and can reduce setup change time. The present invention relates to a folding device.

[0002]

2. Description of the Related Art In recent years, in the tire manufacturing industry, in which the tendency for small-quantity production of many kinds is increasing more and more, there is a demand for simplification of setup change and shortening of setup change time for tire molding machines. By the way, conventional tire building machines,
In particular, a first-stage molding machine of a two-step tire molding machine usually has a mechanism in which a carcass is wound around a tire molding drum, then combined with a bead, and further folded back at both ends of the carcass,
A folding device (ply lock device) for the tire constituent material is provided.

[0003] This tire folding material folding device is composed of a bead ring, a turn-up bladder, a pusher ring, and the like, and these change the position in the drum axis direction (change of the slide stroke) in accordance with the change of the drum width. )Is required.

[0004]

However, if all of them are provided with a position changeover function, the apparatus becomes complicated and the changeover operation takes time. There is also a method of automatic setup change. However, this not only complicates the apparatus further, but also has a problem that it becomes expensive.

The present invention has been devised in view of such a conventional problem, and it is possible to easily perform a position changeover with a simple mechanism and to shorten a changeover operation. It is another object of the present invention to provide an apparatus for turning back tire constituent materials in a tire molding machine that can be manufactured at a lower cost.

[0006]

According to the present invention, there is provided an inner case comprising a turn-up bladder capable of moving back and forth in parallel with a drum shaft and a supporting member thereof, on both sides of an expandable and contractible tire building drum. An outer case composed of a bead ring and its support member, and a pusher ring are provided, and the inner case is brought into contact with the vicinity of both sides of the tire building drum to perform positioning at a position closest to the tire building drum. An apparatus for folding back a tire constituent material in a tire forming machine provided with a replaceable stopper, wherein an inner case is disposed so as to be able to advance and retreat to a tire forming drum side via a cylinder, and a cylinder is provided outside the inner case. The outer case formed in a shape is arranged, and a pusher ring formed in a cylindrical shape is provided on the outer peripheral surface of the outer case. Slidably fitted a grayed, a support member attached to the rear end side of the outer case, a reciprocating cylinder for parallel reciprocating the drum shaft outer casing,
Around the periphery thereof, there is provided a cylinder for moving a pusher ring forward and backward in parallel with the drum axis via a push rod penetrating the support member, and when the inner case and the outer case are relatively displaced in the drum axis direction by a fixed distance. The gist is that at least one ring-shaped stopper is provided in the inner case and two in the outer case.

[0007]

The present invention is constructed as described above, and the slide stroke of the inner case, the outer case, and the pusher ring is changed only by changing the spacers on both sides of the forming drum in accordance with the change of the drum width of the tire forming drum. Therefore, a special positioning mechanism as in the related art is not required, and the setup change time can be shortened.

Further, the pusher ring is supported by the outer case, and is advanced and retracted by a cylinder attached to one end of a guide rod supporting the outer case and a push rod penetrating the guide rod. Can be made shorter and the configuration can be simplified.

[0009]

Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a schematic cross-sectional view of an apparatus for folding back tire constituent materials in a tire forming machine embodying the present invention, and a half cross-sectional view taken along line XX is a cross-sectional view illustrating an operation state when the tire forming drum 1 is narrow. The lower half sectional view taken along the line XX shows a sectional view showing a state in which the outer case and the inner case are at the standby position. The tire forming drum 1 can be expanded and contracted to a rotatable drum shaft 2 and can be replaced. Mounted on On both sides of the tire forming drum 1, an inner case 5 composed of a turn-up bladder 3 and a supporting member 4 capable of moving back and forth in parallel with the drum shaft 2, an outer case 8 composed of a bead ring 6 and a supporting member 7, A pusher ring 12 is provided.

In the vicinity of both sides of the tire building drum 1,
An exchangeable stopper 10 is provided for abutting the inner case 5 and positioning the inner case 5 at a position closest to the tire building drum 1. The inner case 5 is connected to the inner case 5 via a cylinder 11 as shown in FIG. It is configured to be able to advance and retreat to the tire building drum 1 side. The outer case 8 formed in a cylindrical shape is disposed outside the inner case 5, and a pusher ring 12 formed in a cylindrical shape is slidably fitted on the outer peripheral surface of the outer case 8. I have. The support member 13 attached to the rear end of the outer case 8 includes an advancing / retracting cylinder 14 for moving the outer case 8 toward and away from the drum shaft 2, and a plurality of hollow cylinders around the cylinder in parallel with the drum shaft 2. Attach the guide rod 15 and
A pusher cylinder 18 is provided on a support plate 16 provided on the rear end side of the pusher ring 12 via a push rod 17 penetrating through the guide rod 15.

The inner case 5 and the outer case 8
Are provided with ring-shaped stoppers 19, 20a, and 20b that come into contact with each other when they are relatively displaced in the direction of the drum shaft 2 and at least one of these stoppers 19, 20a, and 20b is provided in the inner case 5. Provided, outer case 8
, Two are provided. In addition, although the said structure demonstrated and demonstrated about only one side of the tire building drum 1, the folding apparatus of exactly the same structure is installed also on the other side.

Next, the operation of the device for turning back tire constituent materials in the tire molding machine having the above-described structure will be described. In the half sectional view taken along the line XX of FIG. 1, when the drum width of the tire building drum 1 is narrow, a narrow ring-shaped stopper 10a is used. When the drum width of the tire building drum 1 is wide, As shown in the lower half sectional view taken along the line XX of FIG.
Use b.

First, the operation of the folding device when the drum width of the tire building drum 1 is narrow will be described. Narrow ring-shaped stoppers 10a are installed on both sides of the tire building drum 1 and are provided on the outer peripheral surface of the tire building drum 1. A tire forming material such as a carcass (not shown) is adhered, and the diameter of the tire forming drum 1 is increased. In this state, as shown in FIG. 2, the inner case 5 is moved via the cylinder 11 until the inner case 5 comes into contact with the stopper 10a, and the inner case 5 is positioned at the closest position. Next, when driving a bead W into the side surface of the tire constituent material attached to the tire building drum 1,
With the bead W attached to the tip of the outer case 8, that is, with the bead W attached to the bead ring 6 provided at the tip of the outer case 8, the advance / retreat cylinder 14 is extended and the rear end side of the outer case 8 is operated. The bead W is driven into the side surface of the tire constituent material by moving the stopper 20b provided on the support member 13 attached to the inner case 5 until it comes into contact with the rear end surface of the ring-shaped stopper 19 of the inner case 5.

At this time, the stopper 19 of the inner case 5
And a stopper 20b attached to the rear end of the outer case 8.
La and the distance Lb between the tip of the outer case 8 and the side of the tire forming drum 1 where the bead is driven are as follows:
It is set in advance to be the same distance, and therefore,
When the outer case 8 is stroked and the stopper 20b comes into contact with the ring-shaped stopper 19 of the inner case 5, the position where the bead W is just driven is set.

Further, when the outer case 8 is stroked, the pusher ring 12 disposed on the outer periphery thereof also comes into contact with the end face of the support member 13 and is together with the position of the two-dot chain line on the tire building drum 1 side (see FIG. 1). ). Thereafter, only the outer case 8 is retracted to the original position, and the pusher ring 12 stands by at the most distal position where the outer case 8 has moved. That is, the outer case 8 is moved backward through the forward / backward cylinder 14, and the stopper 20a attached to the center inner surface side of the outer case 8 is moved to a position where it comes into contact with the distal end surface of the stopper 19 of the inner case 5, and stopped. Is what you do.

Also, as described above, the pusher ring 1
2 is projected to a predetermined position in order to tightly wind the cord around the bead W. When compressed air is supplied to the turn-up bladder 3 from a pressure supply source (not shown) to expand the turn-up bladder 3 in this state, the turn-up bladder 3 swells onto the tire forming drum 1 while being guided by the pusher ring 12, When the pusher ring 12 is moved down to the position indicated by the two-dot chain line on the tire forming drum 1 by the pusher cylinder 18 in this state, the bead W is turned by the turn-up bladder 3. 1 Press it so that it wraps around.

As described above, the positioning of the inner case 5, the outer case 8 and the pusher ring 12 in the front-rear direction is determined by one stopper 19 provided on the inner case 5 and two stoppers provided on the outer case 8. 2
0a, 20b, and a reciprocating cylinder 14 having two strokes, large and small, for moving the outer case 8 back and forth.
And by controlling the stroke of the pusher cylinder 18 for moving the pusher ring 12 back and forth, so that when the inner case 5 and the outer case 8 are relatively displaced in the direction of the drum shaft 2 by a fixed distance, the stoppers 19 and 2 are moved.
0a, 20b abuts on one another to perform positioning,
Therefore, mutual positioning can be performed easily and easily without requiring a particularly complicated mechanism.

The tire forming drum 1 shown in the half sectional view taken along the line XX of FIG.
As shown in the lower half-sectional view of the X-ray, when a setup change is performed when the drum width of the tire building drum 1 is large, a wide ring-shaped stopper 1 is provided on both sides of the tire building drum 1.
0b is used. In this case, the inner case 5 becomes an obstacle when the stopper 10b is attached. Therefore, the inner case 5 is moved backward with respect to the tire building drum 1 as shown in a lower half sectional view taken along line XX of FIG. .

The stopper 19 provided on the inner case 5 is retracted to a position where the stopper 20a mounted on the inner side of the center of the outer case 8 comes into contact with the stopper 19, and the positioning is performed, and the apparatus stands by. From this state, the operation of the folding device for the tire constituent material is completely the same as the operation of the folding device when the drum width of the tire forming drum 1 is narrow, and therefore the same reference numerals are given and the description is omitted.

The stoppers 19, 20a, 20b are
One is provided in the inner case 5 and two are provided in the outer case 8, but the present invention is not limited to this. By increasing the number of stoppers, the positioning position can be made more multi-stage, thereby forming a tire having a different width. The change and setup change of the drum 1 can be easily performed.

[0021]

According to the present invention, the slide strokes of the inner case, the outer case and the pusher ring can be changed only by replacing the spacers on both sides of the forming drum with the change of the drum width of the tire forming drum as described above. Therefore, there is an effect that a special positioning mechanism as in the related art is not required and the setup change time can be shortened.

Further, the pusher ring is supported by the outer case, and is advanced and retracted by a cylinder attached to one end of a guide rod supporting the outer case and a push rod penetrating the guide rod. Can be shortened, and the configuration can be simplified.

[Brief description of the drawings]

FIG. 1 is a schematic cross-sectional view of an apparatus for folding back tire constituent materials in a tire molding machine embodying the present invention, and shows XX.
The upper half sectional view on the line is a sectional view showing an operating state when the tire building drum is narrow, and the lower half sectional view on the line XX is a sectional view showing a state in which the outer case and the inner case are at the standby position.

FIG. 2 is a plan view showing a positional relationship between cylinders of an inner case, an outer case, and a pusher ring.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Tire forming drum 2 Drum shaft 3 Turn-up bladder 4 Support member 5 Inner case 6 Bead ring 7 Support member 8 Outer case 9 Pusher ring 10 Stopper 11 Cylinder 12 Pusher ring 13 Support member 14 Reciprocating cylinder 15 Guide rod 16 Support plate 17 Push Rod 18 Pusher cylinder 19 Stopper 20a, 20b Stopper

Claims (1)

(57) [Claims] Claims 1. On both sides of a scalable tire building drum,
An inner case composed of a turn-up bladder that can advance and retreat in parallel with the drum axis and its supporting member, an outer case composed of a bead ring and its supporting member, and a pusher ring are arranged, and near both sides of the tire building drum, In the folding apparatus for tire constituent materials in a tire forming machine provided with an interchangeable stopper for positioning the closest position to the tire forming drum by abutting the inner case, the inner case is connected via a cylinder. It is arranged to be able to advance and retreat on the tire forming drum side, an outer case formed in a cylindrical shape is arranged outside this inner case, and a pusher ring formed in a cylindrical shape is slid on the outer peripheral surface of this outer case. The outer case is connected to the support member attached to the rear end of the outer case. And a cylinder for moving a pusher ring forward and backward in parallel with the drum axis through a push rod penetrating the support member, and the inner case and the outer case are arranged in the drum axis direction. A tire-forming device for a tire forming machine, wherein at least one ring-shaped stopper is provided in the inner case and two in the outer case, the ring-shaped stoppers being in contact with each other when they are relatively displaced from each other.