JPH0349858Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) The present invention relates to a tire gripping lifting device for a tire vulcanizer that grips an unvulcanized tire so that it can be raised and lowered, and transports and stores it in the lower ring of the tire vulcanizer. It is something.

(Prior art) A tire vulcanizer is equipped with an unvulcanized tire insertion device that grasps an unvulcanized tire, carries it down to the center of the tire vulcanizer, and inserts it onto the lower mold. The tire gripping device portion of the unvulcanized tire insertion device is designed to grip the unvulcanized tire and place it on the lower ring, preshaping the bladder, and ensure that the bladder is stored in the center of the lower ring. At times, the unvulcanized tire is pulled down and the bead portion of the unvulcanized tire gripped by the tire gripping part and the tire gripping part are scratched and damaged, as shown in FIG. A support shaft 2 with upper and lower stoppers 4a and 4b is arranged in series on the tire gripping part 1 that grips the tire, and the support shaft 2 is vertically slidable on the lifting cart 3 via sliding bushes 5 and 5. Along with wearing it,
A support shaft 6 is swingably disposed on the elevating cart 3 with a center pin 6a, and upper and lower springs 8, 8 are provided opposite to each other via a guide bar 7 at the end of the support shaft 6 on the side where the support shaft 2 is inserted. At the same time, a tire gripping lifting device has been developed in which a balance weight 9 is attached to the other part of the support shaft 6 with a position adjustment bolt 9a.
If the support shaft 6 is not gripped by the pin 6
The support shaft 2 and the tire gripping part 1 are swung to the left (counterclockwise) as shown in the figure around the center, and the support shaft 2 and the tire gripping part 1 are raised until the lower stopper 4b comes into contact with the lifting cart 3, and when the unvulcanized tire is gripped, the tire gripping Part 1, support shaft 2
Adjust the mounting position of the balance weight 9 so that the support shaft 6 is held in a position where it is swung clockwise (clockwise) against the spring 8 until it becomes parallel to the X-axis. When the unvulcanized tire a is pulled downward in the drawing by preshaping of the bladder, the support shaft 6 is further swung to the right in the drawing against the spring 8, and the support shaft 2
At the same time, the structure allows the tire gripping part 1 to be lowered in the direction of the arrow A, thereby preventing damage to the bead part of the unvulcanized tire and the tire gripping part.

(Problems with the prior art) In the conventional tire gripping lifting device, when the weight of the unvulcanized tire changes, it is necessary to adjust the mounting position of the balance weight, and the balance weight is not installed in the unvulcanized tire insertion device. Therefore, it is necessary to move the insertion device to the working position and use a tool to adjust the mounting position of the balance weight, which takes time and effort.
Further, there are problems such as the structure becoming complicated.

(Purpose of the invention, means for solving problems) This invention is an invention to deal with the above-mentioned problems, and is a device that is connected to a tire gripping part that grips an unvulcanized tire and supported by an elevating cart. The present invention is characterized by a structure that includes a support shaft that slides up and down, a support provided on the upper part of the support shaft, and a fluid pressure cylinder that is fixed to the lifting truck and supports the support via a rod. The support shaft, which is connected to the tire gripping part and is supported by the lifting truck and slides up and down, is supported by the lifting truck via a support and a fluid pressure cylinder, thereby simplifying the structure and reducing the weight of the unvulcanized tire. An object of the present invention is to provide a tire support elevating device for a tire vulcanizer that solves the above-mentioned problems by easily adjusting the elevating and lowering of a tire gripping part in response to changes, improving tire gripping performance and operational reliability.

(Example) An embodiment of the present invention is shown in FIG. A support shaft 12 is connected and erected thereon, and the support shaft 12 is supported via sliding bushes 15, 15 on an elevating cart 13 so as to be vertically slidable.

Further, a support 1 is provided on the upper part of the support shaft 12.
4 is fixedly installed, and a rod 17 of a fluid pressure cylinder 16 erected on the lifting carriage 13 is connected to and supported by the support 14, and one fluid chamber 16a of the fluid pressure cylinder 16 is configured to receive fluid pressure. The supply/discharge line _l1 is connected to the fluid pressure supply line _l3 and the discharge line _l4 equipped with a relief valve 19 via the drive single solenoid valve 18, and the other fluid chamber 16b is connected to the supply/discharge line _l2. It has a connected structure.

(Function) Since the embodiment of the present invention has the above-described configuration, when the driving single solenoid valve 18 is operated as shown in FIG. 1A, the supply/discharge line _l1 is connected from the supply line _l3 Pressure is then supplied into one fluid chamber 16a, and air is discharged from the other fluid chamber 16b to the supply/discharge line _l2 , and the rod 17 of the fluid pressure cylinder 16 is pushed upward in the figure, causing the support 14 and the support shaft to be pushed up. The tire gripping portion 1 is lifted upward in the figure via the handle 12 .

In the above-mentioned raised state, the unvulcanized tire a is gripped by the tire gripping part 1, and the unvulcanized tire a is transported to the center of the tire vulcanizer (not shown), placed on the lower ring, and pre-shaped while still being gripped. However, just before the start, if the driving single solenoid valve 18 is energized and switched as shown in _FIG . Grip part 1
When the unvulcanized tire a is held in a fixed position and the unvulcanized tire a is pulled downward in the figure as the preshaping progresses, the pulling force is applied to the tire gripping part 1, the support shaft 12, the support 14, and the rod. 17 acts as the sealing pressure in the fluid chamber 16a of the fluid pressure cylinder 16, and when the sealing pressure reaches the set pressure, it is relieved to the discharge line _l4 through the relief valve 19, and the tire gripping part 1 is brought to a predetermined position. It goes down easily.

Thereafter, the tire gripping section 1 stores the unvulcanized tire a in a lower ring (not shown) by a known mechanism (not shown) and returns to the standby position, and at that point, the excitation of the single solenoid valve 18 for driving is released. Then, switch as shown in FIG. 1A.

The downward force of the tire gripping portion 1 can be freely adjusted by adjusting the set pressure of the relief valve 19. That is, it can be easily adjusted at a remote location by operating the relief valve handle.

(Effects of the Invention) As described above, the present invention includes a vertically sliding support shaft 12 that is connected to the tire gripping portion 1 that grips the unvulcanized tire a and is supported by the elevating cart 13;
The support 1 is connected to the support 1 through the support 14 provided on the upper part of the
4, the structure is simplified and the tire gripping part can be easily and easily adjusted up and down in response to changes in the weight of the unvulcanized tire, improving tire gripping performance and operation. Reliability has been significantly improved.

[Brief explanation of drawings]

FIG. 1A is a mechanical diagram showing an embodiment of the present invention, FIG. 1B is a switching state diagram of the driving single solenoid valve of FIG. 1A, and FIG. 2 is a mechanical diagram showing a conventional example. a: unvulcanized tire, 1: tire gripping part, 12:
Support shaft, 13: Elevating trolley, 14: Support, 1
6: Fluid pressure cylinder, 17: Rod.

Claims (1)

[Scope of utility model registration request] A support shaft that is connected to a tire gripping part that grips an unvulcanized tire and is supported by an elevating cart and slides up and down, a support provided on the upper part of the support shaft, and a rod that is fixed to the elevating cart. A tire gripping lifting device for a tire vulcanizer, comprising: a fluid pressure cylinder that supports the support via a hydraulic cylinder.