JPH10156833A - Central mechanism of tire vulcanizing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable lessening of the effect of heat on a driving device such as a fluid pressure cylinder at the time of vulcanizing molding by constructing a central mechanism of a link mechanism which is connected to a rim support member and extends and contracts in the direction of advance of the rim support member and of a driving means which makes the link mechanism extend and contract. SOLUTION: On the occasion when a green tire 1 is subjected to vulcanizing molding, the heat in the green tire 1 is conducted in the direction of a table elevating cylinder 36 through a center post 30, since the center post 30 is inserted through from an upper rim mechanism 3 on one side to a low rim mechanism 4 on the other. However, this heat is conducted to the table elevating cylinder 36 indirectly through a table elevating mechanism 26 and, therefore, the upward-downward motion of the table elevating cylinder 36 becomes small. Accordingly, it is unnecessary to consider the heat resistance in the table elevating cylinder 36 and, therefore, a hydraulic cylinder can be applied. In this case, the cost of equipment can be reduced by supplying a working fluid by a supply line of one system.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a center mechanism of a tire vulcanizer for moving a rim mechanism, which is opposed to both surfaces of a green tire to be vulcanized and formed, forward and backward.

[0002]

2. Description of the Related Art Generally, when vulcanizing a green tire, the green tire is loaded into a cavity formed by clamping a movable upper mold and a fixed lower mold. After the outer surface is pressed against the cavity surface while shaping is performed such that the bladder is inflated and brought into close contact with the inner surface of the green tire by steam injection, the green tire is heated and pressurized. Then, when the vulcanization molding is completed after a lapse of a predetermined time, after the mold is opened, the bladder is extended and peeled from the inner surface of the green tire, and the green tire is lifted and peeled from the lower mold, from the gap between the molds. It is designed to be carried out.

By the way, the close contact and peeling of the bladder with respect to the green tire and the peeling of the green tire from the lower mold are performed by a central mechanism.
As shown in FIG. 3, the conventional center mechanism includes a guide cylinder 63 fixed to a base frame 62, a fluid pressure cylinder 64 inserted through the guide cylinder 63 so as to be able to move up and down, and an upper end of the fluid pressure cylinder 64. A lower clamp ring 72 fixed and holding the lower edge of the bladder 61; an upper clamp ring 68 fixed to the upper end of the hollow rod 67 of the hydraulic cylinder 64 and holding the upper edge of the bladder 61; And a knockout lever 73 for raising and lowering the pressure cylinder 64.

According to this structure, the fluid pressure cylinder 64 moves the hollow rod 67 forward and backward to expand and contract the bladder 61, whereby the bladder 61 can be brought into close contact with the green tire 60 or peeled off. I have. Further, by raising the hydraulic cylinder 64 by the knockout lever 73, the green tire 60 can be lifted via the lower clamp ring 72 and peeled off from the lower mold 66.

[0005]

However, in the above-mentioned conventional configuration, since the hollow rod 67 is inserted into the bladder 61, when steam is injected into the bladder 61,
Hot steam is passed through the hollow cylinder 67 to the hydraulic cylinder 6.
4 would be heated directly. Accordingly, the temperature of the fluid pressure cylinder 64 tends to be high, and therefore, if oil is used as the working fluid of the fluid pressure cylinder 64, the oil cannot be used early due to thermal deterioration. Accordingly, even if oil is generally used as a working fluid of a drive mechanism in a tire vulcanizer, it is necessary to use water that does not deteriorate with heat for the fluid pressure cylinder 64, and is composed of oil and water. There is a problem that equipment costs increase due to the need for two supply lines. Further, in such a configuration in which the fluid pressure cylinder 64 is heated to a high temperature, even if an attempt is made to replace the fluid pressure cylinder 64 with another driving device such as an electric type, it cannot be applied in terms of heat resistance. .

Further, in the configuration in which the bladder 61 is expanded and contracted by the hydraulic cylinder 64 as in the conventional case, the hydraulic cylinder 64 longer than the hollow rod 67 projects below the base frame 62. Therefore, when the base frame 62 is set at a predetermined height position from the viewpoint of workability at the time of mold replacement, the fluid pressure cylinder 64 becomes longer than the interval length between the base frame 62 and the installation surface. It is necessary to dig the pit 74 on the surface to accommodate the fluid pressure cylinder 64, and there is a problem that the cost required for foundation work increases. Especially, this pit 7
The problem of the construction cost caused by 4 is that when vulcanizing and molding a large green tire 60, the fluid pressure cylinder 64 becomes longer in proportion to the increase in size and a deep pit 74 is required. It will be big.

Therefore, the present invention can reduce the influence of heat on the driving device such as the fluid pressure cylinder 64 during vulcanization molding, and can reduce the construction cost by eliminating the need for the pit 74. An object of the present invention is to provide a central mechanism of a miniaturized tire vulcanizer.

[0008]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides one rim mechanism such that a pair of rim mechanisms disposed on both sides of a green tire to be vulcanized and formed are relatively moved. A center mechanism of a tire vulcanizer for moving a rim support member provided by movably penetrating the other rim mechanism from the rim support member, the link being connected to the rim support member and extending and contracting in the reciprocation direction of the rim support member. And a drive means for expanding and contracting the link mechanism.

According to the above configuration, when the green tire is vulcanized, the rim support member is inserted from one rim mechanism to the other rim mechanism, so that heat in the green tire is transferred to the rim support member. However, since this heat is indirectly transmitted to the drive means via the link mechanism, the temperature rise of the drive means is slight. Therefore, since it is not necessary to consider heat resistance in the driving means, a hydraulic or electric cylinder device or another driving device can be applied. Thereby, for example, when a hydraulic cylinder device is used as the driving unit, oil can be supplied from an oil supply line generally used in another driving mechanism of the tire vulcanizer, It becomes possible to reduce the equipment cost by using the working fluid as one supply line.

Further, since the rim support member is moved forward and backward by the link mechanism, the length of the forward and backward direction of the link mechanism is longer than that of the cylinder device if the moving distance is the same as compared with the case where the rim support member is moved forward and backward by the cylinder device. It will be shorter. Therefore, since the center mechanism is downsized in the reciprocating direction, for example, even when the center mechanism is vertically arranged so as to move the rim mechanism up and down, the base frame and the mounting surface of the tire vulcanizer are installed. And the link mechanism can be sufficiently arranged between them. As a result, in the tire vulcanizer in which the central mechanism is arranged vertically, the foundation work of digging a pit for accommodating the conventional cylinder device is not required, and the cost can be reduced.
In the tire vulcanizer in which the central mechanism is arranged horizontally, the installation space can be effectively used.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. As shown in FIG. 1, the central mechanism of the tire vulcanizer according to the present embodiment includes a bladder 2 that is in close contact with an inner surface of a green tire 1, an upper rim mechanism 3 that holds an upper edge of the bladder 2, and a bladder. 2 and a lower rim mechanism 4 for holding a lower edge. The upper rim mechanism 3 has an upper clamp ring 5 and an upper bead ring 6 which are formed in an annular shape. It is designed to be clamped from outside and inside. The lower rim mechanism 4 includes a lower clamp ring 8 formed in an annular shape.
And a lower bead ring 9. The lower edge of the bladder 2 is held between the rings 5 and 6 from outside and inside.

The upper rim mechanism 3 includes a center post 30
Is fixed to the upper end portion. After the center post 30 is inserted through the inner peripheral side of the lower rim mechanism 4, the center post 30 is connected to an upper rim elevating mechanism 23, which will be described later, at the lower end, thereby supporting the upper rim mechanism 3 so as to be able to move up and down. ing. On the other hand, the lower clamp ring 8 and the lower bead ring 9 in the lower rim mechanism 4 are screwed to a clamp ring hub 10. A guide cylinder member 11 is fitted to the clamp ring hub 10, and the guide cylinder member 11 is centered via a seal packing 31 and a guide bush 32 so as to prevent steam press-fit into the bladder 2 from leaking to the outside. The side peripheral surface of the post 30 is in airtight contact with the post.

The clamp ring hub 10 and the guide cylinder member 11 are formed with steam introduction holes 10a and 11a, respectively. A steam pipe 12 is connected to an opening of the steam introduction hole 10a in the clamp ring hub 10, and the steam pipe 12 is connected to a steam supply source (not shown). The steam supply source supplies steam having a predetermined pressure and temperature to the steam pipe 12 and the steam introduction holes 10a and 1a.
It is designed to be press-fitted into the bladder 2 via 1a.

At the lower end of the guide tube member 11, a lift tube member 13 is fixed. A bracket member 14 is fixed to the outer peripheral wall of the lift cylinder member 13, and the upper end of the bracket member 14 is fixed to a base frame 15 of the tire vulcanizer. On the upper surface of the base frame 15, a lower platen 17 is provided via a heat insulating member 16. The lower platen 17 is heated by supplying steam from a steam supply source (not shown), and the heat insulating member 16 prevents heat transfer from the lower platen 17 to the base frame 15. ing. A cylindrical lower shield member 19 is provided upright on the outer peripheral surface of the lower platen 17.
Numeral 9 prevents the heat of the lower platen 17 from leaking to the outside. On the other hand, a lower mold 18 is provided on the upper surface of the lower platen 17, and the lower mold 18 is heated to a predetermined temperature by heat from the lower platen 17.

The base frame 15 supports the entire vulcanization molding machine including the central mechanism, and has a predetermined height from the installation surface A in consideration of workability when replacing the lower mold 18 and the like. It is set to be. On the lower surface of the base frame 15, a pair of base side parts 20 are fixedly arranged on the left and right with the lift cylinder member 13 as a center. These base side portions 20 are provided with beam lifting cylinders 21 using oil as a working fluid.

The above-mentioned beam lifting cylinders 21
The advance direction of the cylinder rods 21a is set downward. The distal ends of the cylinder rods 21a are fixed to a flat lift beam 22, and the beam lifting cylinders 21 are connected to the cylinder rods 21a.
The lift beam 22 is connected to the base frame 15 via the base frame 15.
Is raised and lowered. In the center of the lift beam 22, a through hole 22a is formed. The center post 30 supporting the upper rim mechanism 3 is inserted through the through hole 22a. Also, the through hole 22
The lower end of the lift cylinder member 13 is joined to the peripheral edge of the a.
When lifted by 21, the lower rim mechanism 4 is moved up and down via the lift cylinder member 13,
The upper clamp ring 5 is moved up and down via an upper rim elevating mechanism 23 and a center post 30, which will be described later.

The upper rim lifting mechanism 23 is provided on the lower surface of the lift beam 22 and is housed in a base to prevent danger. Upper rim lifting mechanism 23
Has a lift table 25 on which the lower end of the above-mentioned center post 30 is fixed, and a table lifting mechanism 26 disposed between the lift beam 22 and the lift table 25. The table elevating mechanism 26 constitutes a link mechanism so as to move the lift table 25 up and down with respect to the lift beam 22.

That is, the table lifting mechanism 26 includes support members 27a and 27b provided on one side of the center post 30 so as to face the lower surface of the lift beam 22 and the upper surface of the lift table 25, respectively, and the other side of the center post 30. And rail members 28a and 28b provided to face the lower surface of the lift beam 22 and the upper surface of the lift table 25, respectively. Support member 27a.2
7b rotatably supports one ends of the first inclined members 33a and 33b, respectively.
a.33b is rotatably connected at the other end. On the other hand, the rail members 28a and 28b rotatably support one ends of the first inclined members 33a and 33b via slide members 29a and 29b movably engaged, respectively. The inclined members 34a and 34b are rotatably connected at the other ends.

A rotating member 35 and a table elevating cylinder 36 using oil as a working fluid are connected between the second inclined members 34a and 34b. The table elevating cylinder 36 is configured to extend the cylinder rod 36a to expand the intersection angle between the second inclined members 34a and 34b to lower the lift table 25, while moving the cylinder rod 36a backward. As a result, the crossing angle between the second inclined members 34a and 34b is reduced, and the lift table 25 is raised.

The lift table 25 is provided with a magnet 39 via a magnet support member 38. A linear sensor 37 for detecting the amount of lift of the lift table 25 by a magnet 39 is provided beside the lift table 25. Linear sensor 37
Is a rod-shaped sensor unit 37a for detecting the magnet 39.
And a signal output unit 37b that outputs a detection position of the sensor unit 37a as a position signal.
a is provided on the lift beam 22 via the signal output unit 37b. Accordingly, when the magnet 39 moves up and down together with the lift table 25, the linear sensor 37 detects the magnet 39 detected by the sensor unit 37a.
Is detected as the amount of elevation of the lift table 25 and output to a control device (not shown). The control device controls the supply and discharge of the working fluid to and from the table elevating cylinder 36 so that the shaping height corresponding to the tire size is set at the lower limit position of the upper rim mechanism 3.

The operation of the center mechanism in the above configuration will be described. First, as shown in FIG.
1 and the cylinder 42 have the same vertical movement amount L1, the total length L2 of the link mechanism 41 is shorter than the total length L3 of the cylinder 42. Therefore, as shown in FIG. 1, when the tire vulcanizer provided with the upper rim elevating mechanism 23 formed by the link mechanism is installed, the base frame 15 is set at a predetermined height suitable for mold replacement. But
Since the entire length of the upper rim elevating mechanism 23 is shorter than that of a conventional cylinder, the base frame 1
The upper rim lifting mechanism 23 can be housed between the mounting surface 5 and the installation surface A. As a result, it is not necessary to dig a pit on the installation surface A, so that it is possible to reduce the cost required for foundation work when installing the tire vulcanizer.

When a supply pipe for supplying working fluid to the beam lifting cylinder 21 and the table lifting cylinder 36 is laid after the tire vulcanizer is installed, heat transfer from the lower platen 17 in the beam lifting cylinder 21 is performed. Is reduced by the heat insulating member 16 and the like. In the table elevating cylinder 36, heat transfer from the inside of the bladder 2 via the center post 30 is indirect by the upper rim elevating mechanism 23. Therefore, since the temperature rise of both cylinders 21 and 36 is slight,
Even if oil supplied to the other drive mechanism of the tire vulcanizer is used as the working fluid for the two cylinders 21 and 36, thermal deterioration does not occur. As a result, a single supply line consisting of only oil piping can be provided, so that the facility cost can be further reduced in addition to the above-described foundation work.

Next, when performing shaping, the first inclined members 33a and 33b of the table elevating mechanism 26 are used.
The center post 30 is raised together with the lift table 25 by reducing the intersection angle of the second inclined members 34a and 34b by the table lifting cylinder 36. When the upper rim mechanism 3 is lifted via the center post 30 and the bladder 2 held by the upper rim mechanism 3 extends upward and has a diameter smaller than the inner diameter of the green tire 1, the green tire 1 is conveyed by a loader (not shown) and is lowered from above the bladder 2.

When the green tire 1 is inserted into the bladder 2 in the extended state and reaches a predetermined height, the lowering is stopped, and steam is supplied into the bladder 2. Then, the first inclined members 33a and 33b in the table elevating mechanism 26
The center post 30 is lowered together with the lift table 25 by increasing the intersection angle of the second inclined members 34a and 34b by the table lifting cylinder 36. As a result, the bladder 2 abuts against the inner surface of the green tire 1 while being gradually curved and deformed outward by the pressing by the steam, whereby shaping is performed.

Thereafter, when the green tire 1 is confined in the mold clamped while being shaped, steam is supplied to the lower platen 17 and the like, so that the lower mold 18 and the like are heated and the green tire 1 is heated.
Vulcanization molding is performed. At this time, the lower platen 1
The transfer of heat from the cylinder 7 to the beam lifting cylinder 21 is suppressed by the heat insulating member 16 and the base frame 15
And the heat radiation at the base side 20. In addition, heat is transferred from the steam in the bladder 2 to the table lifting cylinder 36 because the center post 30 and the table lifting cylinder 36 are indirectly connected via the table lifting mechanism 26. Even if heated by the steam in the bladder 2, it hardly transmits. Therefore, the beam elevating cylinder 21 and the table elevating cylinder 36 hardly heat up during shaping and vulcanization molding.
There is no thermal degradation of the oil in 6.

After this, when the vulcanization of the green tire 1 is completed after a predetermined time, the table lifting mechanism 26
The angle of intersection of the first inclined members 33a and 33b and the second inclined members 34a and 34b
6, the lift table 25
At the same time, the center post 30 is raised. Then, the upper rim mechanism 3 connected to the center post 30 is raised to a predetermined height position, and the bladder 2 held by the upper rim mechanism 3 extends upward to reduce the diameter smaller than the inner diameter of the green tire 1. Set to have.

Before and after the operation of the upper rim elevating mechanism 23, the lift table 25 moves the beam elevating cylinders 21
Raised by one. Thereby, the lower rim mechanism 4 is raised via the lift cylinder member 13 and the like, and the upper rim lifting / lowering mechanism 23 raises the upper rim mechanism 3 via the center post 30 together with the lift beam 22. When the lower rim mechanism 4 raises the green tire 1 and separates it from the lower mold 18, a loader (not shown) pulls out the green tire 1 from the bladder 2 and conveys the green tire 1 to a post-cure inflator which is the next step.

As described above, the central mechanism of this embodiment is:
One upper rim mechanism 3 and the other lower rim mechanism 4 are movably moved from one upper rim mechanism 3 to the other so as to relatively move a pair of upper rim mechanism 3 and lower rim mechanism 4 disposed on both sides of the green tire 1 to be vulcanized and formed. Center post 30 inserted and provided
(A rim support member) that moves forward and backward, and is connected to the center post 30, and includes a table lifting mechanism 26 including a link mechanism that expands and contracts in the forward and backward directions of the center post 30.
The table has a table elevating cylinder 36 (driving means) that expands and contracts the table elevating mechanism 26.

The table elevating mechanism 26 in the present embodiment includes first and second inclined members 33a, 33b, and 34.
a and 34b are connected and assembled. However, the present invention is not limited to this. For example, a pantograph-shaped parallelogram-shaped link mechanism may be used, or a scissors-shaped central portion may be used. Alternatively, a link mechanism rotatably connected at an end may be used. In the present embodiment, the central mechanism is provided with the lower rim elevating mechanism, but may be replaced with a central mechanism having the upper rim elevating mechanism.

In this embodiment, the hydraulic beam lifting cylinder 21 and the table lifting cylinder 36
Although the case where the (drive means) is used has been described, the present invention is not limited to this, and a hydraulic or electric cylinder device and other drive devices can be applied. Also,
In the present embodiment, the center post 30 is configured to move the upper rim mechanism 30 up and down.
0 may move the lower rim mechanism 4 up and down. Furthermore, in the present embodiment, the configuration in which the central mechanism is vertically arranged in the vertical direction has been described. However, the present invention can be applied to a central mechanism in any arrangement direction such as a horizontal arrangement.

According to the above configuration, when the green tire 1 is vulcanized and formed, the center post 30 is inserted from one upper rim mechanism 3 to the other lower rim mechanism 4. Is conducted toward the table lifting cylinder 36 via the center post 30. However, since this heat is indirectly transmitted to the table elevating cylinder 36 via the table elevating mechanism 26, the temperature of the table elevating cylinder 36 is slightly increased. Therefore, since there is no need to consider heat resistance of the table lifting cylinder 36, a hydraulic or electric cylinder device can be applied, and the table lifting cylinder 36 can be replaced with another driving device. Thus, for example, when a hydraulic cylinder device is used for the table lifting cylinder 36, oil can be supplied from an oil supply line generally used in another drive mechanism of the tire vulcanizer. For,
It becomes possible to reduce the equipment cost by using the working fluid as one supply line.

Further, since the center post 30 is moved forward and backward by the table elevating mechanism 26 composed of a link mechanism, the length of the forward and backward moving directions is the same as compared with the case where the center post 30 is moved forward and backward by the cylinder device. The table lifting mechanism 26 (link mechanism) is shorter than the cylinder device. Therefore, since the center mechanism is downsized in the forward and backward directions, even when the center mechanism is vertically arranged so as to move the rim mechanism vertically, for example, the base frame 15 of the tire vulcanizer is installed with the center mechanism. The table elevating mechanism 26 can be sufficiently arranged between the surface A. As a result, in a tire vulcanizer in which the central mechanism is vertically arranged, the foundation work of digging a pit for accommodating the conventional cylinder device is not required, and the cost can be reduced. In the placed tire vulcanizer, the installation space can be effectively used.

[0033]

According to the present invention, one rim mechanism is movably inserted from one rim mechanism so that a pair of rim mechanisms disposed opposite to each other on both surfaces of a green tire to be vulcanized are relatively moved. In the center mechanism of the tire vulcanizer for moving the provided rim support member forward and backward, a link mechanism connected to the rim support member and extending and retracting in the forward and backward directions of the rim support member, and a driving unit for extending and retracting the link mechanism This is a configuration having

According to the above configuration, when the green tire is vulcanized and formed, the rim support member is inserted from one rim mechanism to the other rim mechanism, so that heat in the green tire is transferred to the rim support member. However, since this heat is indirectly transmitted to the drive means via the link mechanism, the temperature rise of the drive means is slight. Therefore, since it is not necessary to consider heat resistance in the driving means, a hydraulic or electric cylinder device or another driving device can be applied. Thereby, for example, when a hydraulic cylinder device is used as the driving unit, oil can be supplied from an oil supply line generally used in another driving mechanism of the tire vulcanizer, It becomes possible to reduce the equipment cost by using the working fluid as one supply line.

Furthermore, since the rim support member is moved forward and backward by the link mechanism, the length of the forward and backward direction of the link mechanism is longer than that of the cylinder device if the moving distance is the same as compared with the case where the rim support member is moved forward and backward by the cylinder device. It will be shorter. Therefore, since the center mechanism is downsized in the reciprocating direction, for example, even when the center mechanism is vertically arranged vertically so as to move the rim mechanism up and down, the base frame and the mounting surface of the tire vulcanizer are installed. And the link mechanism can be sufficiently arranged between them. As a result, in the tire vulcanizer in which the central mechanism is arranged vertically, the foundation work of digging a pit for accommodating the conventional cylinder device is not required, and the cost can be reduced.
In a tire vulcanizer in which the central mechanism is arranged horizontally, there is an effect that the installation space can be effectively used.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing an operation state of a center mechanism.

FIG. 2 is an explanatory diagram showing the relationship between the total length of a cylinder and a link mechanism and the amount of elevation.

FIG. 3 is an explanatory diagram showing an operation state of a conventional center mechanism.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Green tire 2 Bladder 3 Upper rim mechanism 4 Lower rim mechanism 5 Upper clamp ring 6 Upper bead ring 8 Lower clamp ring 9 Lower bead ring 10 Clamp ring hub 11 Guide cylinder member 12 Steam piping 13 Lift cylinder member 14 Bracket member 15 Base frame Reference Signs List 16 Insulation member 17 Lower platen 18 Lower mold 19 Lower shield member 20 Base side 21 Beam lifting / lowering cylinder 22 Lift beam 23 Upper rim lifting / lowering mechanism 25 Lift table 26 Table lifting / lowering mechanism 30 Center post 31 Seal packing 32 Guide bush 35 Rotating member 36 Table lifting cylinder 37 Linear sensor 38 Magnet support member 39 Magnet

Claims (1)

[Claims] A rim provided by movably penetrating one rim mechanism to another rim mechanism so as to relatively move a pair of rim mechanisms disposed on both sides of a green tire to be vulcanized and formed. A center mechanism of a tire vulcanizer for moving a support member forward and backward, comprising: a link mechanism connected to the rim support member and extending and retracting in the direction in which the rim support member advances and retracts; and a driving unit that expands and contracts the link mechanism. The central mechanism of the tire vulcanizer.