JPH066352B2 - Tire component material sticking drum - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a tire component material application drum, particularly a breaker / tread application drum (commonly called a belt drum).

[Problems to be Solved by Conventional Techniques and Inventions]

Generally, a belt drum is used to form an assembly of a breaker and a tread, which are constituent materials of a tire. A raw tire is molded by being assembled to the carcass shaped as described above.

Therefore, the outer diameter of the belt drum must be increased or decreased,
As the expansion / contraction mechanism, conventionally, for example, there is an air bag type as shown in FIG. That is, in this case
Air is injected into the expansion air bag a, and the air bag a
Was expanded to displace each segment body b in the outer diameter direction. Therefore, there is a drawback that the expansion / contraction stroke is small and is weak against 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 airbag type.

In addition, there is a mechanism that uses a link mechanism as the expansion / contraction mechanism. It has excellent strength when the link is parallel to the pressure direction, but strength when the link is inclined to the pressure direction. Will be inferior.

Therefore, in the present invention, the outer diameter of the tire can be reliably expanded / contracted with a simple structure, the segment bodies are less likely to rattle, and the radial stroke can be made extremely large. The purpose is to provide.

[Means for Solving the Problems]

In order to achieve the above-mentioned object, the tire component material adhering drum according to claim 1 is a cylindrical body externally fitted to the slide body by reciprocating in the axial direction of the slide body externally fitted to the shaft. In a drum whose outer diameter expands and contracts, one or more taper surfaces inclined in the same direction are formed on the outer peripheral surface of the slide body, and a taper slidably contacting the taper surface on the inner peripheral surface of the cylindrical body. A cylinder mechanism that provides an inner surface portion and that reciprocates the slide body in the axial direction is provided outside the cylindrical body, and the cylinder mechanism is provided on the distal end surface and the proximal end surface side of the cylindrical body. A guide mechanism for guiding the movement in the radial direction is provided, and further, a rubber band for elastically urging the cylindrical body in a direction of reducing the diameter of the cylindrical body is attached.

Further, the tire component material adhering drum according to claim 2 includes a slide body externally fitted to a shaft so as to be slidable in the axial direction.
A drum provided with a cylinder mechanism that reciprocates the slide body in the axial direction, and a cylindrical body that is composed of a plurality of segment bodies and is externally fitted to the slide body. One or more taper surfaces inclined in the same direction are formed on the surface, and each segment body of the cylindrical body slides on the taper surface by the reciprocating motion of the slide body in the axial direction. By providing a tapered inner surface portion for displacing the body in the radial direction, it is possible to increase or decrease the outer diameter of the cylindrical body,
Further, the piston of the cylinder mechanism is fixed to the shaft at a position separated from the cylindrical body, and a cylinder tube having the piston as an inner shape is externally fitted to the shaft so as to be slidable in the axial direction. Connecting the slide body and the cylinder tube with a connecting body, providing radial grooves on the distal end surface and the base end surface of the cylindrical body, and allowing the shaft side to slide in the radial groove in the radial direction. A fitting body for fitting is provided, and further, a rubber band for elastically urging each segment body inward in the radial direction is attached to the cylindrical body.

[Action]

When the cylinder tube of the cylinder mechanism is reciprocated in the axial direction, the slide body is reciprocated in the axial direction because it is connected to the tube by the connecting body, and each segment body is displaced in the radial direction. When the slide body slides in the radial direction outwards and then slides in the opposite direction, the elastic urging force of the rubber band displaces the segment bodies inward in the radial direction. To do.

Further, the expansion / contraction of the cylindrical body is guided by the guide mechanism provided on the front end surface side and the base end surface side thereof, and the expansion / contraction of the cylindrical body is performed in a stable state.

Further, since the cylinder mechanism is provided outside the cylindrical body, the outer diameter of the cylindrical body does not become large, which enables tire molding with a small diameter.

Further, since the cylinder mechanism is provided outside the cylindrical body, the inner diameter of the slide body itself can be increased, and thus the outer diameter of the shaft can be increased.

〔Example〕

 Hereinafter, the present invention will be described in detail with reference to the drawings illustrating examples.

FIG. 1 is a cross-sectional view of an essential part of a tire component material adhering drum according to the present invention. This drum includes a slide body 2 that is externally fitted onto a shaft 1 so as to be slidable in an axial direction, and the slide body 2 is an A cylinder mechanism 3 that reciprocates in the axial direction and a cylindrical body 4 that is fitted onto the slide body 2 are provided, and the slide body 2 reciprocates in the axial direction by the drive of the cylinder mechanism 3 to form a cylinder. The outer diameter of the body 4 is expanded and contracted.

Thus, the slide body 2 is a tubular body having one or more receiving surface portions for receiving the cylindrical body 4 on the outer peripheral surface thereof. In FIG. 1 showing an embodiment, the number of receiving surfaces is two, and the tapered surfaces 5 and 5 are inclined in the same direction. Specifically, it is composed of a base end wall 6 having a shaft hole, taper walls 7 forming the tapered surfaces 5 and 5, and a tip wall 8 having a shaft hole. A guide member having a groove 9 on the outer peripheral surface of the shaft 1
10 is fixed along the axial direction by a fixing tool (not shown) such as a bolt, and the inner peripheral surface 11 of the base end wall 6 of the slide body 2, the inner peripheral surface 13 of the connecting portion 12 of the tapered wall 7, and Inner peripheral surface 14 of the tip wall 8
Are formed with fitting portions 15 that are slidably fitted in the recessed grooves 9. 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 ... Arranged in the circumferential direction, and each of the segment bodies 16 ... Is displaced in the radial direction by the reciprocating motion of the slide body 2 in the axial direction. To do.

Thus, each segment body 16 has an inner member 18 and the inner member 18.
An external member fixed to 18 by a fastener such as a bolt (not shown)
The inner member 18 is formed with concave grooves 20, 20 on its inner surface to form tapered surfaces 17, 17. That is, the tapered surfaces 17, 17 correspond to the tapered surfaces 5, 5 of the slide body 2. Bushings 21, 21 that are in sliding contact with the tapered surfaces 5, 5 are fixed to the tip portions 17a, 17a of the tapered surfaces 17, 17, and the tapered surfaces 5, 5 are reciprocally moved in the axial direction of the slide body 2.
A tapered inner surface portion 22 is formed which slides on the rail 5 to displace the segment bodies 16 in the radial direction. Also, each segment body 16
Recessed grooves 23, 23 are provided on the outer surface of the inner member 18 of Fig. 7, and rubber bands 24, 24 are fitted in the recessed grooves 23, 23. That is, the segment members 16 ... Are constantly pressed in the inner diameter direction by the rubber bands 24, 24. The number of segment bodies 16 arranged in the circumferential direction can be set freely.

Further, the movement of each segment body 16 ... Is guided in the radial direction by the guide mechanisms G, G provided on the front end face side and the base end face side of the cylindrical body 4.

That is, radial grooves 28 and 30 are formed on the distal end surface and the proximal end surface of the inner member 18 of the segment body 16, respectively, and one radial groove 28 is
A fitting body 25 made of a rod is fitted so as to be slidable in the radial direction. The fitting body 25 is fixed to a mounting piece portion 27 that is integrally fixed to the shaft 1.

The other radial groove 30 has a fitting body 26 made of a rod.
Fits so that it can slide in the radial direction. The fitting body 26 is fixed to a mounting piece 29 integrally fixed to the shaft 1.

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

Next, the cylinder mechanism 3 includes a piston 31 fixed to the shaft 1 and a cylinder tube 32 having the piston 31 as an internal state, and air into the tube 32 by the fluid supply / discharge means 33. Supply and discharge of fluid from the tube
32 reciprocates in the axial direction.

Here, the piston 31 is formed of a ring body, and is externally fitted and fixed to the shaft 1 at a portion separated from the slide body 2. That is, the stopper 34 fixed to the shaft 1
It is fixed to the through bolt 35. Further, the cylinder tube 32 is a first member that forms a tip wall 36 and an outer peripheral wall 37.
38 and a second member 40 forming the base end portion 39, and the cylinder chamber is provided between the outer peripheral surface of the shaft 1 and the inner peripheral surface of the tube 32.
Forming 41. Then, before and after the piston 31, connection paths 44 and 45 are provided to connect the fluid paths 42 and 43 of the fluid supply / discharge means 33 and the cylinder chamber 41 to each other.

Therefore, when the fluid is supplied into the cylinder chamber 41 through the fluid passage 42 and the connection passage 44, the tube 32 slides toward the tip side as shown by the arrow in FIG. When the fluid is supplied into the cylinder chamber 41 through the connecting passage 45, the tube 32 slides from the state shown in FIG. 2 to the base end side. When supplying fluid to the cylinder chamber 41 via the fluid passage 42, when supplying fluid from the cylinder chamber 41 via the fluid passage 43, discharging fluid from the cylinder chamber 41 via the fluid passage 43. Cylinder chamber 41 via fluid path 43
When supplying fluid to the cylinder chamber 41
It is necessary to discharge the fluid.

Further, the cylinder tube 32 of the cylinder mechanism 3 and the slide body 2 are connected by a connecting body 55 to be integrated.
That is, the connecting body 55 is provided with the screw portion 46 at the tip, and the screw portion 46
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 has a collar portion at the base end.
48 is provided, and the collar portion 48 is housed in a housing chamber 49 provided in the tip wall 36 of the tube 32 and connected to the tube 32.

A stopper 50 having a predetermined width W is externally fitted to the connecting body 55 so as to be slidable in the axial direction. That is, the stopper 50 regulates the slide of the tube 32 in the direction of the arrow (see FIG. 2). By regulating this slide, the amount of movement of the segment bodies 16 in the outer diameter direction is regulated. . Specifically, the tip surface 49a of the storage chamber 49 and the mounting piece 2
The stopper 50 is sandwiched between the end face of 9 and the tube 3
The slide in the direction of the arrow 2 is restricted.

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

Thus, the tire component material adhering drum configured as described above is in the state shown in FIG. 1, that is, the cylinder tube.
The slide body 2 is also moving to the base end side when the 32 is moving to the base end side.
The taper inner surface portions 22, 22 of ... are the tip portions 5 of the taper surfaces 5, 5.
Positioned at a and 5a, the cylindrical body 4 is in a reduced diameter state (state shown in FIGS. 1 and 3). From this state, the cylinder tube 32 is moved in the direction of the arrow shown in FIG. 2 (that is,
Slide the slide body 2 sequentially
Moves to the tip side, and the tapered inner surface portions 22, 22 are tapered surfaces 5,
5 slides to reach the base end portions 5b, 5b of the tapered surfaces 5, 5. That is, each segment body 16 ... Moves in the arrow direction (outer diameter direction), and the cylindrical body 4 is in a diameter expanded state (state shown in FIGS. 2 and 4). In this case, since the stopper 50 having a predetermined width W abuts on the mounting piece 29 and the tip wall 49a of the storage chamber 49 and restricts the movement of the slide body 2 in the arrow direction by the distance W, each segment Expansion of body 16 ... is restricted.

Then, in the expanded 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 around the breakers 51, 51 to form a ring-shaped assembly. A solid body is molded (In addition, a nylon band may be attached before attaching the tread 52.) After that, this assembly,
It is held and transferred by a transfer ring 53 having a known structure. At this time, the outer diameter of the cylindrical body 4 must be reduced, and in order to reduce the diameter, the cylinder shown in FIG. If the tube 32 is slid in the direction opposite to the arrow (base end side), the slide body 2 moves to the base end side, and at this time, the segment bodies 16 are pressed by the rubber bands 24, 24 in the inner diameter direction. Therefore, the segment body 16 ...
2, 22 move in the inner diameter direction while sliding on the tapered surfaces 5, 5, and the cylindrical body 4 is in the reduced diameter state shown in FIG. Therefore, in this state, the above-mentioned assembly can be easily removed from this belt drum, and the transfer ring 53 can transfer it.

It should be noted that the present invention is not limited to the above-described embodiments, and the design can be freely changed without departing from the scope of the present invention. For example, the number of the tapered surfaces 5 of the slide body 2 is of course limited to two in the embodiments. However, the number is not limited to one or two or more.
Further, the inclination angle and the length dimension of the tapered surface 5 can be freely set. The length dimension of the tapered inner surface portion 22 can be freely set, but the length dimension is set in consideration of the displacement stroke of the segment body 16 and the like. That is, if the length is set too long, in the state shown in FIG. 2, the taper inner surface portion 22 protrudes from the taper surface 5 and is useless. Also, the stopper
As for 50, the width W can be freely changed, and if the width W is changed, the outer diameter dimension of the cylindrical body 4 in the maximum expanded state can be changed.

〔The invention's effect〕

Since the present invention is configured as described above, it has the following effects.

The reciprocating movement of the slide body 2 can be performed by one cylinder mechanism 3, and the diameter reduction of the cylindrical body 4 is performed by the elastic urging force of the rubber band 24, and the entire structure is simple. It is easy to manufacture.

The expansion / contraction of the cylindrical body 4 is guided by the guide mechanisms G, G provided on the front end surface side and the base end surface side thereof, and the expansion / contraction of the cylindrical body 4 can be performed in a stable state.

Since the cylinder mechanism 3 is provided outside the cylindrical body 4, the outer diameter of the entire cylindrical body 4 does not become large, which allows tire molding with a small diameter.

Since the cylinder mechanism 3 is provided outside the cylindrical body 4, the slide body 2 installed in the cylindrical body 4 can have a large inner diameter, and thus the shaft supporting the tire component material sticking drum. The diameter can be increased, and the mechanical accuracy and rigidity can be improved.

Since the tapered inner surface portion 22 provided on the inner peripheral surface of the cylindrical body 4 directly slides on the tapered surface 5 of the slide body 2, the cylindrical body 4 expands and contracts without rattling, and the strength of the drum is increased. It will be excellent.

[Brief description of drawings]

1 is an enlarged cross-sectional side view of an essential part in a reduced diameter state showing an embodiment of the present invention, FIG. 2 is an enlarged cross-sectional side view of an essential part in a reduced diameter state, and FIG. FIG. 4 is an enlarged cross-sectional front view of the main part of the BB line in the expanded state of FIG. FIG. 5 is a sectional view of a main part of a conventional example. 1 ... Shaft, 2 ... Slide body, 3 ... Cylinder mechanism, 4
... Cylindrical body, 5 ... Tapered surface, 16 ... Segmented body, 22 ... Tapered inner surface portion, 31 ... Piston, 32 ... Cylinder tube, 55
… Connected body.

Claims (2)

[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 reciprocating the slide body 2 fitted onto the shaft 1 in the axial direction. One or more taper surfaces 5 inclined in the same direction are formed on the outer peripheral surface of the slide body 2, and a taper inner surface portion 22 slidably contacting the taper surface 5 is provided on the inner peripheral surface of the cylindrical body 4, and A cylinder mechanism 3 for reciprocating the slide body 2 in the axial direction is provided outside the cylindrical body 4, and the diameter of the cylindrical body 4 is provided on the distal end surface and the proximal end surface side of the cylindrical body 4. Guide mechanisms G, G for guiding the movement in the direction are provided, and further, the cylindrical body 4 is provided with a rubber band 24 for elastically urging in the direction of reducing the diameter of the cylindrical body 4. Drum with tire constituent materials attached. 2. A slide body 2 which is fitted onto a 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 ... Cylindrical body 4 externally fitted to the slide body 2
And a plurality of tapered surfaces 5 inclining in the same direction are formed on the outer peripheral surface of the slide body 2 and the segment bodies 16 of the cylindrical body 4 are The outer diameter of the cylindrical body 4 is expanded or contracted by providing a tapered inner surface portion 22 which slides on the tapered surface 5 by the reciprocating motion of the slide body 2 in the axial direction to displace the segment bodies 16 in the radial direction. Further, the piston 31 of the cylinder mechanism 3 is fixed to the shaft 1 at a position separated from the cylindrical body 4, and a cylinder tube 32 having the piston 31 as an internal state is attached to the shaft 1. It is externally fitted so as to be slidable in the axial direction, connects the slide body 2 and the cylinder tube 32 with a connecting body 55, and radial grooves 28, 30 are formed on the front end surface and the base end surface of the cylindrical body 4. And the radial grooves 28, 30 on the shaft 1 side. Fitting bodies 25 and 26 that are fitted so as to be slidable in the direction are provided, and further, a rubber band 24 that elastically urges each segment body 16 inward in the radial direction is attached to the cylindrical body 4. A tire component material sticking drum.