JPH03224728A - Drum for sticking tire constituting material - Google Patents

Abstract

PURPOSE:To enlarge or contract positively the outer diameter by means of a simple structure and prevent respective segments from getting loose by providing a cylinder mechanism reciprocatingly moving sliding bodies in the axial direction and a cylindrical body consisting of a plurality of segments and being fitted over the sliding bodies. CONSTITUTION:Sliding bodies 2 are moved to the base end in the state that a cylinder tube 32 is moved to the base end side, and tapered inner surface sections 22, 22 and respective segments 16... are positioned on ends 5a, 5a of tapered surfaces 5, 5, and a cylindrical body 4 is in the state of contracted diameter. When the cylinder tube 32 is slid in the arrow mark direction in said state, sliding bodies 2 are moved to the end side successively, and the tapered inner surface sections 22, 22 slide on the tapered surfaces 5, 5 until the tapered inner surface sections reach the base ends 5b, 5b of said tapered surfaces 5, 5 and the cylindrical body 4 is in the state of enlarged diameter. In said case, a stopper 50 having the given width A is brought into contact with a mounting piece section 29 and an end wall 49a of a storage chamber 49 to limit the movement of the sliding bodies 2 by the distance A in the arrow mark direction and also control the enlargement of the diameters of respective segments 16.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a drum for applying tire constituent materials, particularly to a drum for applying breaker trend materials (commonly referred to as a belt drum).

[Problems to be solved by conventional techniques and inventions] Generally,
A heald drum is used to form an assembly of the breaker and tread, which are the constituent materials of a tire.The assembly is removed from the belt drum, held by a transfer ring, transferred to a shaving drum, etc., and shaved into a toroidal shape. A green tire is formed by assembling the tire into a carcass.

Therefore, the outer diameter of the belt drum must expand and contract.
As the expansion/contraction mechanism, there has conventionally been an air pack type mechanism as shown in FIG. 5, for example. That is, in this case,
Air is injected into the expansion airbag a, and the airbag a
was expanded to displace each segment body in the outer radial direction. Therefore, there was a drawback that the expansion/contraction stroke was small and that it was vulnerable to external pressure. C is a rubber band for diameter reduction. There is also a tube type (not shown), but this also has the same drawbacks as the air bank type.

In addition, some expansion/contraction mechanisms use link mechanisms, but they have excellent strength when the links are parallel to the pressure direction, but they are not strong when the links are tilted to the pressure direction. It becomes inferior in quality.

Therefore, in the present invention, the tire component material attached drum can reliably expand and contract the outer diameter with a simple structure, each segment body is hard to shake, and the radial stroke can be extremely large. The purpose is to provide

[Means to solve the problem]

In order to achieve the above-mentioned object, in the tire constituent material pasting drum according to claim 1, the outer diameter of the cylindrical body fitted onto the slide body expands and contracts due to the reciprocating movement of the slide body in the axial direction. A drum; a receiving surface portion for receiving the cylindrical body;
One or more cylinder mechanisms are provided on the slide body, and a cylinder mechanism for reciprocating the slide body in the axial direction is provided outside the slide body. Further, the tire constituent material pasting drum of claim 2 includes a slide body fitted onto the shaft so as to be slidable in the axial direction, a cylinder mechanism that reciprocates the slide body in the axial direction, and a plurality of segment bodies. and a cylindrical body fitted externally on the slide body; the slide body having two or more tapered surfaces inclined in the same direction formed on the outer circumferential surface thereof; Each segment body of the cylindrical body is provided with a tapered inner surface that slides on the tapered surface and displaces the segment body in the radial direction by reciprocating the slide body in the axial direction, thereby adjusting the outer diameter of the cylindrical body. Further, the piston of the cylinder mechanism is fixed to a shaft located at a distance from the sliding body, and the cylinder tube containing the piston can be slid in the axial direction on the shaft. The slide body and the cylinder tube are connected to each other by a connecting body.

[For production]

When the cylinder tube of the cylinder mechanism is reciprocated in the axial direction, the slide body, which is connected to the tube by a connecting body, reciprocates in the axial direction, and each segment body is displaced in the radial direction. The outer diameter of the cylindrical body expands and contracts. (Note that the reduction may be achieved by fitting a rubber band or the like around the segment body and using the restoring force of the rubber hand.) Furthermore, each segment body can be received at one or more places. Furthermore, since the slide body and the cylinder mechanism are provided at different positions, the outer diameter of the slide body can be made small, thereby making it possible to form a tire with a small diameter. Furthermore, the inner diameter of the slide body can be increased, thereby increasing the diameter of the shaft that supports the tire component pasting drum, thereby making it possible to improve mechanical precision and rigidity.

〔Example〕

Hereinafter, the present invention will be explained in detail based on drawings showing examples.

FIG. 1 shows a cross-sectional view of a main part of a tire constituent material pasting drum according to the present invention. It includes a cylinder mechanism 3 that reciprocates in the axial direction, and a cylindrical body 4 that is fitted onto the slide body 2. When the cylinder mechanism 3 is driven, the slide body 2 reciprocates in the axial direction to form a cylinder. The outer diameter of the shaped body 4 expands and contracts.

Thus, the slide body 2 is a cylindrical body having one or more receiving surfaces for receiving the cylindrical body 4 on its outer peripheral surface. In FIG. 1 showing one embodiment, there are two receiving surfaces, each of which has a tapered surface 5.5 inclined in the same direction. Specifically, it consists of a proximal wall 6 having an axial hole, tapered walls 7, 7 forming tapered surfaces 5, 5, and a distal end wall 8 having an axial hole, and the outer periphery of the shaft 1. A guide member 1 having a groove 9 on the surface
0 is fixed along the axial direction with a fixing device (not shown) such as a bolt, and is attached to the inner circumferential surface 11 of the base end wall 6 of the slide body 2, the inner circumferential surface 13 of the connecting portion 12 of the tapered wall 7, and Fitting portions I5 are formed on the inner circumferential surface 14 of the tip wall 8 to be slidably fitted into the grooves 9, respectively.

That is, the slide body 2 reciprocates in the axial direction while being guided by the guide member 10.

Next, the cylindrical body 4 is composed of a plurality of segment bodies 16 disposed in the circumferential direction, and each segment body I6
... is displaced in the radial direction by the reciprocating motion of the slide body 2 in the axial direction.

Each segment body 16... is composed of an inner member 18 and an outer member 19 fixed to the inner member 18 with a fixing tool such as a bolt (not shown), and the inner member 18 has a concave groove on its inner surface. 20.20 is formed to form a tapered surface 17.17. In other words, this tapered surface 17.17 corresponds to the tapered surface 5.5 of the slide body 20. Further, a tapered surface 5.
A tapered inner surface 22 is fixed with a bushing 21.21 that slides on the segment body 16, and slides on the tapered surface 5°5 by reciprocating the slide body 2 in the axial direction to displace the segment body 16 in the radial direction. is formed. In addition, each segment body 16
A groove 23.23 is provided on the outer surface of the inner member 18, and a rubber band 24.24 is fitted into the groove 23.23. In other words, by the rubber band 24°24,
Each segment body 16... is constantly pressed in the inner radial direction. Note that the number of segment bodies 16 arranged in the circumferential direction can be set freely.

Further, the movement of each segment body 16 in the radial direction is guided by guide members 25 and 26 that are integrally installed and fixed to the shaft 1. Here, the guide member 25 is made of a rond that is fixed to the mounting piece 27, and is slidably fitted into a radial groove 28 provided on the distal end surface of the internal member 18. Note that the mounting piece 27 is integrally fixed to the shaft 1. Furthermore, the guide member 26 refers to the mounting piece 2
9, and is slidably fitted into a radial groove 30 provided on the proximal end surface of the internal member 18.

Therefore, the movement of each segment body 16 in the radial direction is performed accurately.

Next, the cylinder mechanism 3 includes a piston 31 fixed to the shaft 1 and a cylinder tube 32 that includes the piston 31, and includes air, etc. into the tube 32 by the fluid supply/discharge means 33. The tube 32 reciprocates in the axial direction by supplying and discharging fluid.

Here, the piston 31 is made of a ring body, and is externally fitted and fixed on the shaft l at a portion spaced apart from the slide body 2. That is, it is fixed to the stopper 34 fixed to the shaft 1 via the bolt 35. The cylinder tube 32 also includes a first member 38 that forms a distal end wall 36 and an outer circumferential wall 37, and a second member 4 that forms a proximal end portion 39.
0, and a cylinder chamber 41 is formed between the outer peripheral surface of the shaft 1 and the inner peripheral surface of the tube 32. The fluid passage 4 of the fluid supply/discharge means 33 is located before and after the piston 31.
A connecting passage 44 that communicates and connects 2.43 and the cylinder chamber 41.
．． 45 are provided.

Therefore, when fluid is supplied into the cylinder chamber 41 through the fluid path 42 and the connecting path 44, the tube 32 slides toward the distal end as shown by the arrow in FIG. When fluid is supplied into the cylinder chamber 41 through the connecting path 45, the tube 32 slides backward from the state shown in FIG. 2 toward the proximal end. Note that when the fluid is supplied to the cylinder chamber 41 via the fluid path 42, and when the fluid in the cylinder chamber 41 is supplied via the fluid path 43, the fluid path 43 is
The fluid in the cylinder chamber 41 may be discharged through the
When supplying fluid to the cylinder chamber 41 via the fluid path 43, it is necessary to discharge the fluid from the cylinder chamber 41 via the fluid path 42.

Further, the cylinder tube 32 of the cylinder mechanism 3 and the slide body 2 are connected by a connecting body 55 and are integrally formed. That is, the connecting body 55 is provided with a threaded portion 46 at the tip, and the threaded portion 46 is , is connected to the slide body 2 by being screwed into a screw hole 47 provided in the base end wall 6 of the slide body 2, and
A flange portion 48 is provided at the base end, and the flange portion 48 is accommodated in a storage chamber 49 provided in the distal end wall 36 of the tube 32 and connected to the tube 32 .

A stopper 5 having a predetermined width A is attached to the connecting body 55.
0 is fitted onto the outside so that it can freely slide in the axial direction. In other words, this stopper 50 is inserted in the direction of the arrow of the tube 32 (see FIG. 2).
By restricting the slide, the amount of movement of the segment bodies 16 in the outer radial direction is restricted. Specifically, the stopper 5o is sandwiched between the distal end surface 49a of the storage chamber 49 and the end surface of the attachment piece portion 29 to restrict sliding of the tube 32 in the direction of the arrow.

A plurality of connecting bodies 55 are arranged at predetermined intervals in the circumferential direction, and mounting pieces 27 and 29 are provided corresponding to each segment body.

Therefore, when the tire component pasting drum configured as described above is in the state shown in FIG. 1, that is, in a state where the cylinder tube 32 is moving toward the base end, the slide body 2 also moves toward the base end. In this state, the tapered inner surfaces 22° 22 of each segment body 16... are tapered surfaces 5.
5, and the cylindrical body 4 is in a reduced diameter state (the state shown in FIGS. 1 and 3). and,
If the cylinder tube 32 is slid from this state in the direction of the arrow shown in FIG.
2 slides on the tapered surface 5.5 and reaches the base end portions 5b, 5b of the acid tapered surface 5.5. In other words, each segment body 16.
... moves in the direction of the arrow (outer diameter direction), and the cylindrical body 4 enters the diameter-expanded state (the state shown in FIGS. 2 and 4). In this case, the stopper 50 having a predetermined width A comes into contact with the mounting piece 29 and the tip wall 49a of the storage chamber 49, and limits the movement of the slide body 2 in the direction of the arrow by the distance A, so that each segment Expansion of the diameter of the body 16 is regulated.

Then, in the expanded diameter state shown in FIG. 2, one or more breakers 51, 51 are wound around the outer peripheral surface of the cylindrical body 4, and then the tread 52 is wound thereon to form a ring-shaped assembly. A solid body is formed (a nylon band may be pasted before the tread 52 is pasted).Then, this assembly is held and transferred by a transfer ring 53 of known structure, but at this time, a cylindrical The outer diameter of the body 4 must be reduced, and in order to reduce the diameter, slide the cylinder tube 32 in the direction opposite to the arrow (toward the proximal end) from the state shown in FIG. The body 2 moves toward the proximal end, and at this time, the segment body 24.2
4, the segment body 1 is pressed in the inner radial direction.
6..., the tapered inner surface 22.22 is the tapered surface 5.5
The cylindrical body 4 moves in the inner diameter direction while sliding, and the cylindrical body 4 enters the diameter-reduced state shown in FIG. Therefore, in this state, the above-mentioned assembly can be easily removed from this heald drum,
Transfer using the transfer ring 53 becomes possible.

Note that the present invention is not limited to the above-described embodiments, and the design may be changed without departing from the gist of the present invention. For example, the number of tapered surfaces 5 of the slide body 2 may of course be limited to two as in the embodiments. However, you are free to use one or more than one.

Furthermore, the inclination angle and length of the tapered surface 5 can be freely set. Note that the length of the tapered inner surface portion 22 can be set freely, but the length is set in consideration of the stroke of displacement of the segment body 16, etc. That is, if it is set too long, the tapered inner surface 22 will protrude from the tapered surface 5 in the state shown in FIG. 2, which is wasteful.

Further, the width A of the stopper 50 can be freely changed, and by changing the width A, the outer diameter dimension of the cylindrical body 4 in its maximum diameter expansion state can be changed.

〔Effect of the invention〕

Since the present invention is configured as described above, it produces the effects described below.

Each segment body 16... is connected to the slide body 2 at one or more locations.
This belt drum has excellent strength because the pressure receiving area of the slide body 2 is large. Also, the cylinder mechanism 3 is not electrically driven.
The outer diameter of the slide body 2 is expanded or contracted by the cylinder mechanism 3, so the overall structure is simple.Furthermore, since the piston 12 and cylinder tube 32 of the cylinder mechanism 3 are not housed within the slide body 2, the structure of the slide body 2 is The outer diameter size can be made small, which makes it possible to mold tires with a small diameter, and the inner diameter size of the slide body 2 can be made large, thereby reducing the diameter of the shaft that supports the tire component pasting drum. It is possible to increase the size and improve mechanical precision and rigidity. Another advantage is that the expanded outer diameter can be easily changed.

[Brief explanation of drawings]

FIG. 1 is an enlarged cross-sectional side view of the main part in the reduced diameter state showing an embodiment of the present invention, FIG. 2 is an enlarged cross-sectional side view of the main part in the enlarged diameter state, and FIG. FIG. 4 is an enlarged cross-sectional front view of the main part taken along line BB in the enlarged diameter state of FIG. 2. FIG. 5 is a cross-sectional view of the main part of the conventional example. l... Shaft, 2... Slide body, 3... Cylinder mechanism, 4... Cylindrical body, 5... Tapered surface, 16
...Segment body, 22...Tapered inner surface part, 31.
...Piston, 32...Cylinder tube, 55...
- Connector. Patent Applicant: Sumitomo Rubber Industries, Ltd. No. 3 Figure 9 Figure 4 Figure 5 Figure 5 Proceeding Vehicle Official Document (Spontaneous) December 27, 1990 1.1 Timber Cattle 1990 Patent Application No. 319880 2 , Title of the invention, Tire component m-size drum 3, Relationship with the person making the correction, Hanyu.

Claims (1)

[Scope of Claims] 1. A drum in which the outer diameter of a cylindrical body 4 fitted onto the slide body 2 is expanded or contracted by the reciprocating movement of the slide body 2 in the axial direction, the cylindrical body 4 is provided on the slide body 2, and a cylinder mechanism 3 for reciprocating the slide body 2 in the axial direction is provided on the outside of the slide body 2. Drum with constituent materials attached. 2. Consists of a slide body 2 externally fitted onto the shaft 1 so as to be slidable in the axial direction, a cylinder mechanism 3 for reciprocating the slide body 2 in the axial direction, and a plurality of segment bodies 16. A drum comprising a cylindrical body 4 that is fitted onto the slide body 2, and two or more tapered surfaces 5 inclined in the same direction are formed on the outer peripheral surface of the slide body 2. In addition, the cylindrical body 4
Each segment body 16 is provided with a tapered inner surface 22 that slides on the tapered surface 5 and displaces the segment body 16 in the radial direction by reciprocating the slide body 2 in the axial direction. The piston 31 of the cylinder mechanism 3 is fixed to the shaft 1 at a portion spaced apart from the slide body 2.
A cylinder tube 32 having the piston 31 therein is fitted onto the shaft 1 so as to be slidable in the axial direction, and the sliding body 2 and the cylinder tube 32 are connected by a connecting body 55. A drum for attaching tire constituent materials.