JPH0574812U - Center mechanism lifting device for tire vulcanizer - Google Patents

Abstract

(57) [Abstract] [Purpose] The strength of the base frame can be kept high, the link mechanism is not required, and the equipment is simplified. An object of the present invention is to provide a central mechanism lifting device for a tire vulcanizer, which can be sufficiently exerted and can be easily released from a lower mold even for a large size tire. A tire vulcanizer in which the lower clamp mechanism 3 is provided with an elevating cylinder 4 for elevating and lowering a central mechanism 1 composed of an upper clamp mechanism 2 and a lower clamp mechanism 3 for sandwiching the upper and lower ends of a molding bladder B respectively. In the central mechanism lifting device, the lifting cylinder 4 is connected to the lower end portion 4a of the lifting cylinder 4 so as to extend and contract in the same axis direction.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a central mechanism lifting device for a tire vulcanizer, and more specifically, it can keep the strength of a base frame high, simplifies the device by eliminating a link mechanism, and eliminates mechanical loss. The present invention relates to a central mechanism lifting device for a tire vulcanizer, which is capable of fully exerting the capacity of a lifting cylinder provided.

[0002]

[Prior Art]

 Conventionally, a standing post type central mechanism is generally well known as a central mechanism of a tire vulcanizer. This central mechanism is composed of an upper clamp mechanism and a lower clamp mechanism that clamp the upper and lower ends of the molding bladder respectively. Then, for example, an elevating cylinder vertically fitted in a guide cylinder is vertically provided in the lower clamp mechanism, and the central mechanism can be moved up and down as the elevating cylinder moves up and down. In addition, a piston that can be raised and lowered by pressure fluid or the like is installed inside this lifting cylinder, and the upper clamp mechanism is mounted on the upper end of the rod of this piston, and the upper clamp mechanism moves up and down as the piston moves up and down. It is like this.

The elevating cylinder is fixed at its lower end to the other end of a dogleg-shaped arm whose one end is fixed to the tip of a piston rod of an elevating cylinder laterally installed on the base frame. The central convex portion is supported by the base frame, and forms a link mechanism that can pivot around the central convex portion. That is, the horizontal reciprocating motion of the piston rod of the lifting cylinder is changed to the vertical (up and down) motion through the link mechanism. This elevating cylinder moves up when the vulcanized tire is released from the lower mold, and when the cylinder operates, the arm of the link mechanism turns around the central convex portion to move the elevating cylinder up and down. The central mechanism is moved up and down.

[0004]

[Problems to be solved by the device]

 However, in the above-mentioned conventional central mechanism lifting device for a tire vulcanizer, it is difficult to release the vulcanized tire from the lower mold, especially when vulcanizing a large tire. In order to solve the problem, it is possible to increase the capacity of the cylinder by using a large cylinder, but since the cylinder is provided on the base frame of a predetermined shape, it is necessary to enlarge the cylinder due to the strength problem of the base frame. However, even if an auxiliary cylinder is installed to improve the lifting capacity, it is difficult to secure the mounting space at an appropriate position.Even if it is installed, the piston rod is located near the lower end of the lifting cylinder. Since the position is reduced, there is a problem that the capacity of the auxiliary cylinder is reduced by half and the bearing mounting portion of the elevating cylinder is damaged.

The present invention has been devised in view of such conventional problems. It is possible to keep the strength of the base frame high, simplify the device by eliminating the link mechanism, and eliminate mechanical loss. The center mechanism lifting device for a tire vulcanizer that can fully release the capacity of the lifting cylinders that have been installed to allow even large tires to be easily released from the lower mold. The purpose is to do.

[0006]

[Means for Solving the Invention]

 In order to achieve the above object, the present invention has a lower end portion of an elevating cylinder provided in the lower clamp mechanism, which is a central mechanism that includes an upper clamp mechanism and a lower clamp mechanism that respectively clamp the upper and lower ends of a molding bladder. The gist of the invention is to connect an elevating cylinder that can expand and contract in the same axis direction to the elevating cylinder.

[0007]

[Function of the device]

 This invention is configured as described above, and since the lifting cylinder that is extendable / contractible in the same axis direction of the lifting cylinder is connected to the lower end of the lifting cylinder, the link mechanism for lifting the central mechanism is not required, The device can be simplified, and since the operation of the lifting cylinder is directly transmitted to the lifting cylinder in the same direction, there is no mechanical loss and the lifting cylinder's capabilities can be fully exerted. Since it is not the lifting operation via the turning operation by the link mechanism, it is possible to prevent damage to the members that guide the lifting.

Further, it is not necessary to provide a notch or an installation portion for installing the lifting cylinder on the base frame of the tire vulcanizer, so that the strength of the base frame can be kept high, and a large-sized lifting machine with large capacity can be maintained. Since it can be installed easily regardless of the strength problem of the base frame, even a special-purpose cylinder can be easily released from the lower mold even for large tires.

[0009]

[Example of device]

 An embodiment of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a front cross-sectional view of a central mechanism elevating device on which a central mechanism of a tire vulcanizer is mounted. 1 is a central mechanism for mounting a molding bladder. The central mechanism 1 is a molding bladder. The upper clamp mechanism 2 holds the upper end of B and the lower clamp mechanism 3 holds the lower end of the molding bladder B.

An elevating cylinder 4 on which the lower clamp mechanism 3 is mounted is internally mounted in a support guide cylinder 6 provided on a base frame 5 so that the elevating cylinder 4 can move up and down. A piston 8 including a piston rod 7 connected to the mechanism 2 is slidably fitted inside the elevating cylinder 4. Further, the lower end portion 4a of the elevating cylinder 4 is hermetically sealed, and the lower end portion 4a is provided with a supply port 9 for the pressure fluid to be supplied into the elevating cylinder 4 for moving the piston 8 up and down. A cylinder drain 10 is provided at the upper end.

Further, an elevating cylinder 11 for elevating the elevating cylinder 4 up and down is installed at the lower end portion 4a. The rod 12 of the lifting cylinder 11 is connected to the locking portion 4b provided at the lower end 4a of the lifting cylinder 4 so that the rod 12 can extend and contract in the same axial direction as the lifting cylinder 4. With the expansion and contraction of 12, the elevating cylinder 4 is directly moved up and down. The lifting cylinder 11 is supported by a support frame (not shown) provided on the base separately from the base frame 5.

Reference numeral 13 is a guide cylinder that is fixed inside the elevating cylinder 4 and supports the piston rod 7 and guides its vertical movement. Further, 14 is a pressure supply pipe, and the heat and pressure medium is supplied from the pressure supply pipe 14 through the passage 15 into the molding bladder B. Next, the operation of the central mechanism lifting device of the tire vulcanizer having the above structure will be described.

When vulcanizing and molding a green tire, the green tire is clamped by the upper and lower molds, and then a heat and pressure medium is supplied into the molding bladder B so that the molding bladder B is attached to the inner surface of the green tire. I will inject it. Then, when the vulcanization molding is completed, the upper mold mold is first released, and then the lower mold is released. When the lower mold is released from the mold, the lifting cylinder 11 is actuated, the rod 12 is extended, and the lifting cylinder 4 connected to the tip of the rod 12 is lifted. Then, the lower clamp mechanism 3 mounted on the upper end of the elevating cylinder 4 ascends together with the upper clamp mechanism 2 to release the vulcanized tire attached to the lower mold from the lower mold. is there.

At this time, since the rod 12 of the lifting cylinder 11 is directly connected to the lower end of the lifting cylinder 4 in the same direction as the axial direction of the lifting cylinder 4, the lifting operation of the lifting cylinder 11 is performed accordingly. Since it is directly transmitted to the elevating cylinder 4 through the rod 12 in the same direction, there is no mechanical loss, and the capacity of the elevating cylinder 11 can be fully exerted. Since it is not a lifting operation, it is possible to prevent damage to the members that guide the lifting.

Further, a link mechanism for raising and lowering the central mechanism is not required, so that the apparatus can be simplified, and the strength problem of the base frame 5 is large even in the case of a large-sized raising and lowering cylinder 11 having a large capacity. Since it can be installed easily regardless of the conditions, even a large size tire can be easily released from the lower mold.

[0016]

[Effect of the device]

 As described above, according to this invention, since the lower end of the elevating cylinder is connected to the elevating cylinder that can be expanded and contracted in the same axial direction of the elevating cylinder, a link mechanism for elevating the central mechanism is not required, The equipment can be simplified, and since the lifting motion of the lifting cylinder rod is transmitted directly to the lifting cylinder in the same direction, there is no mechanical loss and the lifting cylinder's capabilities are fully exerted. Since it is possible to do this, and since it is not a lifting operation through the turning operation by the link mechanism, there is an effect that the member that guides the lifting can be prevented from being damaged.

Further, it is not necessary to provide a notch or an installation portion for installing the lifting cylinder on the base frame of the tire vulcanizer, so that the strength of the base frame can be kept high, and a large-sized lifting machine with a large capacity can be maintained. Can be easily installed regardless of the strength problem of the base frame, so even if it is a large-sized tire, it can be easily released from the lower mold. . Further, since the central mechanism elevating device is simplified, there is an effect that it can be manufactured at low cost.

[Brief description of drawings]

FIG. 1 is a front partial cross-sectional view of a central mechanism lifting device on which a central mechanism of a tire vulcanizer of the present invention is placed.

FIG. 2 is a partial side sectional view of a central mechanism elevating device on which the central mechanism of the tire vulcanizer of the present invention is mounted.

[Explanation of symbols]

1 Central Mechanism 2 Upper Clamping Mechanism 3 Lower Clamping Mechanism 4 Lifting Cylinder 4a Lower End 4b Locking Part 11 Lifting Cylinder 12 Rod B Molding Bladder

Claims (1)

[Scope of utility model registration request] 1. A central mechanism elevating and lowering unit of a tire vulcanizer provided in the lower clamp mechanism, which is provided with an elevating cylinder for elevating and lowering a central mechanism composed of an upper clamp mechanism and a lower clamp mechanism that respectively clamp the upper and lower ends of a molding bladder. In the apparatus, a lifting mechanism for a central mechanism of a tire vulcanizer, wherein an elevating cylinder that is expandable / contractible in the same axis direction of the elevating cylinder is connected to a lower end portion of the elevating cylinder.