JPH0420028Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a forming drum for a tire forming machine, and more particularly, to a structure for attaching and detaching the forming ring.

(Prior Art) Conventionally, there is a molding drum for a tire molding machine, for example, the one disclosed in Japanese Patent Application No. 121620/1983 filed by the present applicant. This tire molding machine is designed such that the main shaft 1 is designed so that a step 9 formed on the inner circumferential surface of an inner ring 8 fitted to the tip of the main shaft 1 comes into contact with a step 10 between the small diameter section 2 and the medium diameter section 4. It is fixed to the main shaft 1 by being pushed in by a cap 11 screwed into the tip of the main shaft 1. An outer ring 12 is fitted onto the inner ring 8, and the outer ring 12 is arranged such that a step 13 formed on the inner circumferential surface of the outer ring 12 abuts a step 14 formed on the outer circumferential surface of the inner ring 8. , a cap 15 screwed onto the outer circumference of the tip of the inner ring 8
is pushed in and fixed to the inner ring 8. At this time, a key is interposed between the inner ring 8 and the outer ring 12 to restrict relative rotation between them. On the outside of the outer ring 12, members necessary as a former ring for molding a tire using the outer ring 12 as a base are provided. Also,
It has an inner ring 32 that is fitted onto the large diameter section 3 of the main shaft 1, and this inner ring 32 is fixed to a sleeve 33 that is fitted onto the large diameter section 3 of the main shaft 1 at its proximal end. This sleeve 33 rotates integrally with the main shaft 1 and is moved along the rotational axis of the main shaft 1 by a moving mechanism (not shown). 34 is an intermediate ring fitted onto the inner ring 32 and the sleeve 33, and the outer ring 3 is attached to the intermediate ring 34.
5 is fitted externally. The intermediate ring 34 and the outer ring 35 are connected by a key 36. The intermediate ring 34 and the outer ring 35 are fixed to the sleeve 33 by a ring 38 inserted into an annular groove 37 formed on the outer periphery of the sleeve 33 and a threaded ring 39 screwed into the inner circumferential surface of the outer ring 35. On the outside of the outer ring 35, members necessary as a forming ring for molding a tire using the outer ring 35 as a base are provided.
Such a forming drum for a tire forming machine has a main shaft 1.
As the forming ring rotates, the pair of forming rings rotate together, and as the forming ring moves closer and further away from each other, the cylindrical raw material wrapped around the forming ring is formed into a tire green case. .

(Problems to be Solved by the Invention) However, in the case of such a conventional molding drum for a tire molding machine, in order to assemble the outer ring 35 of the base assembled as a former ring, the tip of the sleeve 33 ( The outer ring 35 is gradually inserted from the left end in the figure), and the key 36 is used to position the intermediate ring 34 in the circumferential direction, and then the ring 39 is tightened to fix the outer ring 35 to the sleeve 33. It's getting old. In addition, in order to assemble the outer ring 12 of the base assembled as another formal ring, gradually insert the outer ring 12 from the end of the inner ring 8 on the side opposite to the outer ring 35 (left side in the figure). After positioning each other in the circumferential direction with respect to the inner ring 8 using a key fixed to the circumference of the inner ring 8 with a bolt, steps 13 and 14 are formed.
The outer ring 12 is fixed to the inner ring 8 by bringing them into contact with each other and further tightening the cap 15. Therefore, when assembling, key 3
6 and another key cannot be seen from the outside, and the weight of the entire forming ring is very large, so there is a problem in that it takes a very long time to assemble it. Furthermore, as mentioned above, since the formal ring is fixed by tightening threaded members such as the ring 39 and the cap 15, these screw members must be tightened or loosened each time the formal ring is installed or removed. Moreover, since the thread diameter of these screw members is large, there is a problem in that the work efficiency is deteriorated to the extent that special tools must be used.

(Means for Solving the Problems) In order to solve the above problems, the present invention includes a rotating main shaft, a first forming ring provided on the distal end side of the main shaft, and a first forming ring provided on the proximal end side of the main shaft. A forming drum for a tire molding machine comprising a second forming ring that can approach and separate from the first forming ring, wherein the first forming ring is formed on the circumference of an end portion of the first forming ring opposite to the second forming ring. and an engagement means capable of engaging with the main shaft side, a support shaft connected to the tip of the main shaft on the same axis as the main shaft, a toggle mechanism provided at the tip of the support shaft, and a toggle mechanism of the toggle mechanism. A drive member that moves on the support shaft when activated, and an engagement member that is driven on the support shaft by the drive member and rotates so that its tip engages with the engagement means. The structure is as follows.

(Function) In such a forming drum for a tire building machine, the engagement means on which the first forming ring is formed is located at a position where the person performing the assembly work can easily check it from the outside, so that the engagement means of the first forming ring is easily visible from the outside. First, a first forming ring is provided on the tip side of the main shaft so that the means faces the engaging member, and then the toggle mechanism is actuated to move the driving member on the supporting shaft, thereby driving the engaging member on the supporting shaft. At the same time, it is rotated so that its tip end is engaged with the engaging means.
In this way, the first forming ring can be easily and quickly fixed integrally to the main shaft by one-touch operation of the toggle mechanism, and there is no need for conventional screw members or special tools for tightening them. Work efficiency can be improved.

(Example) Examples of the present invention will be described below based on the drawings. 1 to 5 are diagrams showing an embodiment of a forming drum for a tire forming machine according to the present invention.

First, to explain the configuration, in FIG. 1, 41 is a main shaft, and this main shaft 41 is driven and rotated by a rotational drive mechanism (not shown) and reciprocated in the direction of its rotational axis by a reciprocating mechanism (not shown). Ru. The main shaft 41 has a small diameter part 41a on the distal end side and a large diameter part 41b on the base end side, and the small diameter part 41a and the large diameter part 41b are connected by a medium diameter part 41c. 45 is a molding center surface, and a first forming ring 46 is attached to the main shaft 41 on the tip side from this molding center surface 45.
The first former ring 46 moves toward and away from the forming center surface 45 by the reciprocating movement of the main shaft 41. The main shaft 41 is located on the proximal side of the molding center surface 45.
A second former ring 47 is supported which is movable along the axis of rotation of the second former ring 47.
moves toward and away from the forming center surface 45 in synchronization with one of the first former rings 46 . As a result, the first formaling 46 and the second formaling 47
can be moved closer to each other and separated from each other. The first former ring 46 has an inner ring 48 that is fitted onto the small diameter portion 41a and the medium diameter portion 41c of the main shaft 41,
This inner ring 48 has a support shaft screwed into the tip of the main shaft 41 so that a step 48a formed on the inner peripheral surface of the inner ring 48 comes into contact with a step 41d between the small diameter portion 41a and the medium diameter portion 41c. 43 and is fixed to the main shaft 41 by being pushed in by the cap portion 43a. The support shaft 43 is connected to the main shaft 41 via the cap portion 43a so as to extend on the same axis as the main shaft 41.
It is connected with. An outer ring 49 is fitted onto the inner ring 48 so that a step 49a formed on the inner circumferential surface of the outer ring 49 abuts a step 48b formed on the outer circumferential surface of the inner ring 48. It is located. Nuts 51 and 52 are screwed onto both ends of the outer ring 49, and a first formal ring 46 is connected between the nuts 51 and 52 with the outer ring 49 as a base.
Various members (not shown) necessary for this purpose are provided. The second former ring 47 has an inner ring 54 that is fitted onto the large diameter portion 41b of the main shaft 41, and this inner ring 54 is fixed to a sleeve 57 that is fitted onto the base end of the large diameter portion 41b of the main shaft 41. ing. This sleeve 57 rotates integrally with the main shaft 41 and is moved along the rotational axis of the main shaft 41 by a moving mechanism (not shown). Reference numeral 55 denotes an intermediate ring that is fitted onto the inner ring 54 and the sleeve 57, and an outer ring 56 is fitted onto the intermediate ring 55. The outer ring 56 has nuts 61 and 62 screwed into its both ends.
Various members (not shown) necessary for the second former ring 47 are provided between these nuts 61 and 62, with the outer ring 56 as a base.
A pin 65 is provided on the outer periphery of the sleeve 57, and a U that fits into the pin 65 is provided at the end of the outer ring 56 opposite to the molded center surface 45, as shown in FIG.
A groove 56a is formed. Tama, sleeve 5
A pull clamp 67 is rotatably supported on the outer periphery of the outer ring 56 via a bracket 66.
As shown in FIG. 3, a pair of engagement links 68 are provided at positions facing 7. As shown in FIG. When the pull clamp 67 is raised, the hook portion 6
7a is engaged with the engagement link 68 (arrow A) and the pull clamp 67 is pushed down (arrow B), thereby the outer ring 56 is moved toward the pull clamp 67 side. At this time, the end of the intermediate ring 55 is brought into contact with the ring 59 inserted into the annular groove 58 formed on the outer periphery of the sleeve 57, and the outer ring 56 is brought into contact with the step 55a formed on the outer periphery of the intermediate ring 55. The steps 56b formed on the inside abut each other to position and fix the parts in the axial direction.

Again on the first former ring 46 side, a toggle mechanism 70 is provided at the tip of the support shaft 43, and this toggle mechanism 70 is rotatably provided on the support shaft 43 via a pin 75, and is connected to the operation lever 7.
1 has a rotary link 72 to which it can be attached. As shown in FIG. 4, the rotating link 72 is rotatably connected to a connecting link 73 via a pin 76, and the connecting link 73 is rotatably connected to a sliding ring 74 via a pin 77. It is connected. The sliding ring 74 slides on the support shaft 43 in its axial direction, and a bracket 80 having an L-shaped cross section and provided with bolts 79 is fixed to its outer periphery.
The bolt 79 is screwed into a drive member 82, and a disc spring 83 is interposed between the drive member 82 and the sliding ring 74. Two upper and lower engaging members 85 are arranged on the right side of the drive member 82 in the drawing, and these engaging members 85 are connected to a support member 86 that is slidably supported by the support shaft 43 via a pin 78. It is rotatably provided. The support member 86 is a key 87
It is configured such that it cannot rotate relative to the support shaft 43 through the support shaft 43, and is always biased toward the left side in the figure by a spring 88. When the support member 86 is positioned on the left side in the figure, it is tilted to be approximately horizontal by a leaf spring 89, as shown in the lower half of the figure. A pin 9 is provided near the pin 78 of the engaging member 85.
0 is provided, and this pin 90 is connected to the engaging member 8.
5 rotates to stand up, the support member 8
The engaging member 8 that comes into contact with the stepped portion 86a of No. 6 and beyond that
Controls the rotation of 5. A fixed collar 92 is fitted to the left end of the outer ring 49 in the figure, and the fixed collar 92 is fixed to the outer ring 49 so as not to rotate. As shown in FIG. 5, the fixed collar 92 has two grooves 92a, which are engagement means, formed on the circumference of the end opposite to the second former ring 47 at symmetrical positions in the diametrical direction.
When the engaging member 85 is rotated to stand up, the first former ring 46 and the tip of the engaging member 85 on the main shaft 41 side can be engaged with this groove 92a.

Next, the effect will be explained. A cylindrical raw material with bead wires embedded in both ends is transported by a loader (not shown), etc., and is transferred to the first forming ring 4.
6 and the second former ring 47 . At this time, since the first former ring 46 and the second former ring 47 are at the closest positions, the cylindrical raw material can be easily attached to them. The main shaft 41 is driven and rotated by a rotational drive mechanism (not shown), so that the first forming ring 4
6. The second former ring 47 and the attached cylindrical raw material rotate together, and with this rotation, the first former ring 4 is rotated by a reciprocating mechanism (not shown).
The tire green case is molded while moving so that the tire green case 6 and the second former ring 47 are gradually separated from each other.

By the way, the first formaling 46 and the second formaling
To assemble the former ring 47, proceed as follows. First, the outer ring 56 of the second former ring 47 is fitted into the intermediate ring 55, and the U-shaped groove 56a at the end of the outer ring 56 is fitted into the pin 65. As a result, the engagement ring 68 is naturally positioned opposite the pull clamp 67. Next, when the hook portion 67a is engaged with the engagement ring 68 and the pull clamp 67 is brought down, the outer ring 56 is moved toward the pull clamp 67. At this time, the intermediate ring 55 abuts against the ring 59 and the step 55a
contacts the step 56b to position and fix the outer ring 56, that is, the second former ring 47. In this way, the second former ring 47 can be integrally fixed to the main shaft 41 easily and quickly by one-touch operation of the pull clamp 67.

To assemble the first former ring 46, first, the outer ring 49 is fitted into the inner ring 48 so that the groove 92a of the fixed collar 92 is placed in a position facing the engagement member 85. Since the groove 92a of the fixed collar 92 of the first former ring 46 is located at a position where the person performing the assembly work can easily check it from the outside, this work can be easily performed even if the first former ring 46 is heavy. Next, by attaching the operating lever 71 to the rotation link 72 and rotating it from the position indicated by the two-dot chain line to the position shown by the solid line in the figure, the connecting link 73 also moves from the position indicated by the two-dot chain line to the position shown by the solid line. Then, the driving member 82 moves to the right in the figure via the sliding ring 74, the bolt 79, and the disc spring 83 to drive the engaging member 85, and the engaging member 85 rotates against the leaf spring 89. As a result, the pin 90 comes into contact with the stepped portion 86a. Next, the support member 86 moves to the right side against the spring 88 as shown in the upper half of the figure, and the tip of the engagement member 85 engages with the groove 92a of the fixed collar 92, and the step 49a changes to the step 48b. The outer ring 49, ie, the first former ring 46, is positioned and fixed by contacting the ring. At this time, the pin 76 connecting the rotary ring 72 and the connecting link 73 crosses the axis of the main shaft 41 and stops slightly downward in the figure, so that the pin 76 is self-locked, that is, the first former ring 46 and the second former ring Due to the internal pressure of 47, the rotation link 72 rotates in the opposite direction, and
5 can be prevented from coming off from the groove 92a. The disc spring 83 serves to absorb variations in the mounting dimensional accuracy of the first former ring 46. In this way, the first former ring 46 can be easily and quickly fixed integrally to the main shaft 41 by one-touch operation of the toggle mechanism 70, and the need for a conventional screw member or special tool for tightening it is eliminated. Work efficiency can be improved without the need.

When removing the first former ring 46, rotate the operating lever 71 counterclockwise in the figure to remove the connecting link 73, pin 77, and sliding ring 7.
4. The drive member 82 moves to the left in the figure via the bracket 80 and the bolt 79, the support member 86 is pushed back to the left in the figure by the spring 88, and the engagement member 85 is moved downward in the figure by the leaf spring 89. Return to approximately horizontal position as shown in the half. Therefore, the tip of the engagement member 85 is completely removed from the groove 92a, and the outer ring 49, that is, the first former ring 46 can be removed by pulling it out to the left in the figure.

(Effect of the invention) As explained above, according to the forming drum for a tire molding machine according to the invention, the place where the engaging part of the first former ring and the engaging member engage can be easily accessed from the outside during assembly. In addition to being located in a visible location, a toggle mechanism was used instead of a screw member to position and fix the first former ring.
Even if the forming ring is heavy, it can be assembled with a single touch, making the assembly work easier and faster, and the work efficiency can be improved since a special tool for tightening the screw member is not required.

[Brief explanation of the drawing]

1 to 5 are diagrams showing an embodiment of the molding drum for a tire molding machine according to the present invention, in which FIG. 1 is a sectional view thereof, FIG. 4 is a cross-sectional view of the groove 92a of the fixing collar 92 in FIG. 1, and FIG. 1 is a view taken along the line bb of the fixed collar 92 in FIG. 1. FIG. 41...Main shaft, 41a...Small diameter portion, 41b...
Large diameter part, 41c...Medium diameter part, 41d...Step, 4
3...Support shaft, 43a...Cap part, 45...
Molding center surface, 46...first forming ring, 47
...Second formal ring, 48...Inner ring,
48a, 48b...step, 49...outer ring,
49a...Step, 51, 52, 61, 62...Nut, 54...Inner ring, 55...Intermediate ring, 55a...Step, 56...Outer ring, 56
a...U-shaped groove, 56b...step, 57...sleeve, 58...annular groove, 59...ring, 65,7
5-78, 90... Pin, 66, 80... Bracket, 67... Pull clamp, 67a... Hook portion, 68... Engagement link, 70... Toggle mechanism,
71... Operating lever, 72... Rotating link, 73
... Connecting link, 74 ... Sliding ring, 79 ...
Bolt, 82... Drive member, 83... Belleville spring, 8
5...Engaging member, 86...Supporting member, 86a...
Stepped portion, 87...Key, 88...Spring, 89
...Plate spring, 92...Fixing collar, 92a...Groove (engaging means).

Claims (1)

[Scope of utility model registration request] A rotating main shaft, a first former ring provided on the distal end side of the main shaft, and the first former ring provided on the proximal end side of the main shaft approach each other.
A molding drum for a tire molding machine comprising a separable second formering ring, which is formed on the periphery of an end of the first formering ring opposite to the second formering ring, and is engageable with the first formering ring and the main shaft side. a support shaft connected to the tip of the main shaft on the same axis as the main shaft, a toggle mechanism provided at the tip of the support shaft, and movement on the support shaft by the operation of the toggle mechanism. and an engaging member that is driven on the support shaft by the driving member and rotates so that its tip engages with the engaging means. molded drum.