JPS62130833A - Split type automatic bead-inserting unit - Google Patents

Abstract

PURPOSE:To contrive reduction in the working cycle during the insertion of a bead by a structure wherein a base ring equipped with bead-inserting units and bead holder units, all of which consist of an automatic bead-inserting unit, is divided into a plurality of portions. CONSTITUTION:An automatic bead-inserting unit 30 is installed on a tailstock stand 11. On the base ring 31 of the automatic inserting unit 30, a plurality of bead holder unit mechanisms 34, each of which consists of a bead holder unit 32 and a pair of bead-inserting units 33a and 33b arranged in such a manner as to pinch the bead holder unit 32 between them, are provided. A split base ring 31a and a split base ring 31b, both of which can be opened or closed about an axis 36 by means of a cylinder 38, constitute the base ring 31. The tip 131a of the split base ring 31a and the tip 131b of the split base ring 31b coincide correctly with each other through a proper guide. According to the constitution as mentioned above, the reduction in the working cycle during the insertion of a bead can be contrived and consequently the efficient bead inserting work can be done.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a split-type automatic bead insertion device, and more particularly to a split-type automatic bead insertion device that shortens the work cycle during bead insertion. It is something.

[Prior art]

Conventionally, bead insertion in this type of tire molding machine was
A worker manually attached it to the bead centering of the tire molding machine.

In addition, various other bead insertion devices have been proposed, but most of them involve simple bare beads without a bead filler or bead cover, or those that involve large hexagonal beads or round beads.

For example, as shown in Fig. 12(a) and Fig. 12(bl), in the parallel press-fitting method of beads, when inserted in the direction of arrow F, the bead cover lap portion of bead main body B and bead cover In areas where the bead cover b is not attached tightly, as shown in the figure, the bead cover b deforms and gets caught, making it impossible to insert it completely. There is also a risk of A falling off, which is a disadvantage that hinders automatic tire molding.

In addition, since conventional base rings were one-piece,
Since the base ring had to be inserted or removed while the forming drum was in a reduced diameter state, it took a lot of time and it was not possible to efficiently insert the beads.

[Purpose of the invention]

This invention was devised by focusing on the conventional problems, and its purpose is to shorten the work cycle when inserting a bead, and to make it lighter by automatically inserting a bead ring. In order to improve labor and productivity, especially on the main body side, the bead is set by passing it through the forming drum, so even if the automatic step is advanced by mistake, the worker will not have to pinch his or her fingers between the bead and the drum. The present invention provides a split-type automatic bead insertion device that can prevent the occurrence of an accident in which the bead is inserted.

[Structure of the invention]

In order to achieve the above object, the present invention includes an automatic bead insertion unit that is rotatable and movable back and forth on the tail stock stand, and includes a bead insertion unit and a bead holder unit that constitute the automatic bead insertion unit. The gist is that the base ring is configured so that it can be divided into a plurality of parts.

[Embodiments of the invention]

Hereinafter, the present invention will be described in detail based on the accompanying drawings.

FIG. 1 shows a side view of a tire molding apparatus 10 embodying the present invention, and in this tire molding apparatus 10, reference numeral 11 denotes a tail stock stand slidably disposed in the axial direction;
Reference numeral 12 denotes an outer case attached to the main shaft 13 on the side of the tail stock stand 1, and a bead setting ring 18 is attached to the side surface of the outer case 12. Further, 15 is a headstock disposed in the same axial direction as the main shaft 13, and 16 is an outer case attached to the main shaft 17 on the head stock side.
A bead setting ring 18 is attached to the side surface of the tail stock stand 11 side. Further, numeral 19 indicates an expandable and contractible molding drum provided on the main shaft 20 on the headstock side.

An automatic bead insertion unit 30 according to the present invention is installed on the tail stock stand 11.

This automatic bead insertion unit 30 has a base ring 31
A rotating mechanism 60 that rotates the automatic bead insertion unit 30, and an advancing/retracting mechanism 70 that moves the automatic bead insertion unit 30 forward or backward.
It is installed on 1.

The back surface of the base ring 31 has two arms 32a,
32b and two frames 33a.

33b, and four pins 34a, 34b, 34c, and 34d that rotatably connect these parts.

The pivot mechanism 60 includes a support arm 61 on the frame 32b.
is mounted, and an output rod 64 of a cylinder 63 is connected to this support arm 61 via a pin 62. Also,
This cylinder 63 is supported via an arm 65 by the arm 33b that constitutes the four-bar parallel link mechanism.

On the other hand, the forward/backward movement mechanism 70 includes the base plate 71
A cylinder 72 is installed above, and the rond of this cylinder 72 is connected to a slide shaft 73 that connects to the arm 33b. The slide shaft 73 is installed parallel to the cylinder 72 and has a bearing 74 installed on the base plate 7e.
a and 74b so as to be slidable.

Next, as shown in FIGS. 2 and 3, the base ring 31 of the automatic bead insertion unit 30 includes a bead holder unit 32 and a pair of bead insertion units 1-33a sandwiching the bead holder unit 32.

Bead holder unit mechanism 34 composed of 33b and 33b.
A plurality of (eight in this embodiment) are arranged.

In this embodiment, the bead insertion units 33a and 33b are arranged close to both sides of the bead holder unit 32, but this is not particularly limited.

Further, in this embodiment, the base ring 31 is divided into a divided base ring 31a and a divided base ring 31b, and a metal fitting 35a is attached to the divided base ring 31a, and a metal fitting 35b is attached to the divided base ring 31b. ing. The metal fittings 35a and the metal fittings 35b are attached to the shaft 36.
A cylinder 38 is swingably attached to the metal fitting 35a via a pin 37, and a bracket 39 is attached to the tip of the output iron 38a, and the metal fitting 35a is connected to the metal fitting 35a via a pin 40. 35b.

As a result, the base ring 31 can be opened and closed by the divided base ring 31a1 divided base ring 31b by the cylinder 38 around the shaft 36, and the tip part 131a of the divided base ring 31a and the divided base ring 13 can be opened and closed.
The tip 131b of b is properly aligned with a suitable guide (for example, a spigot).

Note that it is not necessarily necessary to divide depending on the order of operation described later.

FIG. 3 shows an enlarged view of the main parts of the automatic bead insertion device unit 30, 18 is a bead setting ring on the tire molding machine side, B shows a bead (ring) to be held,
B1 is a rubber strip having a profile called a bead filler, B2 is a corded rubber sheet called a bead cover, and B3 is a part of a bead wire made of piano wire or the like.

41 is the pair of bead insertion units 33a, 33b.
This bead (ring) holder arm 41 is fixed to the arm base 41 and connected to the placket 4 via a pin 43.
4, it is swingably attached to the base ring 31. 45 also indicates bead (ring) holder arm 4.
1 indicates a push bolt for positioning, and 46 indicates a compression spring for closing the bead (ring) holder arm 41.

Reference numeral 47 indicates an opening cylinder of the bead (ring) holder arm 41, and this output rod 47a is in contact with the arm base 42.

As a result, the bead (ring) holder arm 41 will not become larger than the preset size relative to the inner diameter of the bead B, but by selecting the output of the cylinder 47, the force exerted toward the center will exceed a certain level. When subjected to a force of

Furthermore, when the output of the cylinder 47 is removed, the tip of the bead (ring) holder arm 41 swings toward the center due to the elastic force of the compression spring 46, and the bead B is received from a suitable feeding device (see the figure). At the same time, the receiver can be reliably removed without being affected by the deformation of the bead B, and the deformation of the bead B can also be corrected by the output of the cylinder 47 after the receiver is removed.

Next, FIGS. 4 and 5 show a side view and a front view of the bead holder unit 32. A cylinder 48 is fixed to the base ring 31, and a base plate 49 is attached to the cylinder 48.
Arms 50a and 50b are symmetrically protruding from the upper part of.

A pin 51 is swingably attached to the arms 50a, 50b via a bearing or the like, and an L-shaped holder arm 52 is attached to the pin 51.

A space is provided in the L-shaped arm 52 at an appropriate position closer to the center than the pin 51, and the bearing 5 is inserted through the pin 53.
4 is rotatably attached. This bearing 5
4 and the cylinder 48 passing through the base plate 49
The tips of the output lots 48a are in contact with each other.

The holder arm 52 has an L-shape in this embodiment, and its tip 52a comes into contact with the side surface of the bead B supplied to the bead (ring) holder arm 41, and its center side The lower surface has an appropriate profile to prevent scratches when the arm 52 holds the bead B.

Further, a pin 55 and a bolt 56 are provided at the rear lower end of the arm 52.
A tension spring 57 is attached via.

With the above combination, when air pressure etc. are supplied to the cylinder 48, the output rod 48a pushes the bearing 54, but since the position of the pin 51 is fixed, the arm 52 swings around the pin 51. As shown in FIG. 6, the tip 52a moves to push in while pulling up the side surface of the bead B diagonally upward from the center side.

Next, the operation and operation when inserting the bead will be explained.

FIG. 7 (al) shows that when the bead holder unit 32 is activated and the upper bead B is held in the bead setting ring 18 by the holder arm 52, the bead holder arm 41 on the opposite side (lower side) is placed in the center. This shows a case where the person runs away to the side.

In FIG. 7 (bl), each of the bead holder units 32 is P, X+, X2, Yt, Yz, Z+.

zz , Q, the insertion operation is (P)−(X+
, Xz ) → (Yt , Yt ) → (Z+ , Zg)
- (Q)), the upper part of the bead (ring) B is first inserted into the bead setting ring 18 by the operation shown in FIG. However, once the bead part is inserted into the bead setting ring 18, it cannot be removed or escaped, so the bead holder unit 32
When you have finished operating the bead setting ring 1,
It is inserted in 8.

In this way, due to the combination of the operation of inserting the bead B diagonally upward from the center and the escape of the bead holder arm 41, the bead (ring) B may be deformed or some of the ramp portions of the bead cover 82 may be damaged. Therefore, even if the inner diameter changes, the bead B can be easily inserted, unlike the conventional case where the beads are pushed in parallel.

Fig. 8(a) shows a case where the part of the bead (ring) B having the lap part of the bead cover B2 is first inserted into the bead setting ring 14, and then the opposite side is inserted in Fig. 8(b). However, as shown later in FIGS. 9(a) and 9(b), a diagonally downward force F is applied to the bead portion on the opposite side inserted by the bead holder arm 41. bead cover B2 inserted first.
Since a downward force F1 is applied to the lamp section of
The rubber sheet of the wrap section is compressed, which allows the bead section on the opposite side to be inserted.

FIG. 10(a) to FIG. 10(C) show the sequence of operations when only the bead (ring) B on the headstock side according to the present invention is automatically inserted.

First, in FIG. 1, the bead holder unit 32 and the tail stock stand 11 are in a standby state.

In this state, when the bead B is supplied to the bead holder unit 32 by an appropriate bead supply device (not shown), the bead B is held by the cylinder 63 between the tailstock side main shaft 13 and the expandable/contractable forming drum 19. The holder unit 32 turns and lowers to a predetermined position (see FIG. 10(a)).

Thereafter, the cylinder 72 moves the bead setting ring 18 attached to the outer case 16 on the headstock 15 side past the forming drum 19, which has been reduced in diameter. Move towards 19 (1st
(See Figure 0 (b)).

Thereafter, the distance between the bead setting ring 18 and the tip of the bead holder arm 41 of the bead holder unit 32 becomes a predetermined minute gap α (see FIG. 3), and the bead setting ring 18 and the bead holder unit 32
When the centers of the beads are aligned with each other by appropriate guide means, the bead press-fitting operation described above is performed. Thereafter, the base ring 31 is opened by the cylinder 38 as shown in FIG. After that, the cylinder 72 returns the bead holder unit 32 to the standby position.

In the embodiment of the present invention, the base ring 31 of the bead holder unit 32 is divided into two parts, and operates very rationally as described above. However, if the base ring 31 is not divided, the In this state, the diameter of the forming drum 19 is not expanded, but the diameter is contracted, and after the bead is inserted, the drum is returned to the position shown in FIG. , and then move the tail stock stand 11 to "J", but it is obvious that this order of operation takes more time than when the base ring 31 is split.

〔Effect of the invention〕

This invention is mounted on the tail stock stand as described above.
Installed an automatic bead insertion unit that can rotate and move forward and backward.
Since the base ring including the bead insertion unit and the bead holder unit constituting this automatic bead insertion unit is configured to be able to be divided into a plurality of parts, the following excellent effects can be achieved.

(1) The work cycle during bead insertion can be shortened, and the bead insertion work can be performed efficiently.

(2) By automatically inserting the bead ring, it is possible to reduce labor and improve productivity.

(3) Especially on the main body side, the bead is set by passing through the forming drum, so if the automatic step is advanced by mistake, an accident may occur where the worker's finger gets caught between the bead and the drum. Therefore, this device ensures the safety of workers.

(4) Even if the bead is deformed or the bead cover has a lapped portion and the inner diameter is uneven, insertion can be made easily.

[Brief explanation of drawings]

Figure 1 is a side view of the tire forming device, Figure 2 is a front view of the bead holder unit, Figure 3 is a partially enlarged sectional view of the bead holder unit and bead insertion unit, and Figure 4 is a side view of the bead holder unit. Figure 5 is a front view of Figure 4, Figure 6 is an explanatory diagram of the operation of the holder arm, Figure 7 (a) is an operation diagram of the bead holder, and Figure 7 (bl is an explanatory diagram of the operation of the bead holder unit). , Fig. 8(a), Fig. 8(b), Fig. 9(a), Fig. 9 (bl is an explanatory diagram of the operation when inserting the bead, Fig. 10(a) to Fig. 10(C)
is an explanatory diagram of bead insertion by the tire molding device, No. 11
The figure is a side view showing another embodiment of the base ring, and FIGS. 12(a) and 12(b) are illustrations of a conventional parallel press-fitting method for beads. DESCRIPTION OF SYMBOLS 11... Tail stock stand, 18... Bead setting ring, 30... Bead automatic insertion unit, 31... Base ring, 32... Bead insertion unit, 33a, 33b... Bead holder unit , B... Bead.

Claims (1)

[Claims] An automatic bead insertion unit that can rotate and move forward and backward is installed on the tail stock stand, and a base ring that includes a bead insertion unit and a bead holder unit that constitute this automatic bead insertion unit is configured so that it can be divided into a plurality of parts. A split-type automatic bead insertion device that is characterized by: