JPH07299513A - Gripper for gripping high temperature product - Google Patents

Abstract

PURPOSE:To obtain a gripper having an insulating action without using an insulator by providing a through-hole in a member in front of a shaft, in the rear of a part in contact with an object to be gripped on a pair of fingers that are oppositely arranged to be freely opened/closed through a shaft, and making the cross-section smaller than the front and the back members. CONSTITUTION:When a rod 5 is advanced from a retreated state making fingers 1 from an open state to a closed state by means of a link mechanism, and gripping a high temperature object 11 to be worked, the heat of the object 11 is transferred to the fingers 1 through the surface in contact with the object 11. With the transferred heat to the fingers 1 reaching a hole 10 working part, the cross section of the fingers 1 is rapidly reduced, making the heat difficult to transfer to the rear part from the hole 10. Simultaneously with this adiabatic effect, the fingers 1 are drilled with the hole 10, which expands the contact area with the atmosphere, enabling the heat contained in the tip end of the fingers 1 to radiate to the outside air. Thus, by drilling the hole 10 on the fingers 1, a heat insulating effect and a heat radiation effect are simultaneously obtained, and the main body of a feeding device is thereby protected from heat.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gripper of a device for supplying a high-temperature work piece to a rolling roll, wherein the fingers of the gripper have a heat insulating function and a heat radiating function at the same time, and the supply device body is processed. It is designed to protect the heat of the object.

[0002]

2. Description of the Related Art A conventional gripper for gripping a high-temperature workpiece will be described with reference to FIG. A finger support frame 16 is fixed to the tip of the arm 15, and both ends of a shaft 17 are fixed to the finger support frame 16. Inside the finger support frame 16, a pair of fingers 12 are arranged opposite to each other via the shaft 17 so as to be openable and closable. The finger 12 has a claw portion 13 that is in direct contact with the workpiece 11 at the tip, and the finger 12 and the claw portion 13 are fixed with a bolt 20 via a thin heat insulating material 14.
A rod 21 was provided inside the arm 15 so as to be slidable in the axial direction, and the rear end portion of each finger 12 and the tip end of the rod 21 were connected using a link plate 18 and a pin 19. In this way, the nail 13 is attached to the tip of the finger 12 via the heat insulating material 14.
The structure for bolting is also shown in Japanese Utility Model Publication No. 61-19918.

[0003]

For this reason, there is a drawback that the bolt loosens and the claw moves due to the cracking of the heat insulating material, which often causes the workpiece to fail to be gripped or dropped. Therefore, an object of the present invention is to provide a gripper having a heat insulating action without using a heat insulating material.

[0004]

In order to achieve the above object, the present invention relates to a gripper for gripping a high-temperature object, and a portion of a gripper which is openably and closably arranged via a shaft to contact with the object to be grasped. The through hole is provided in the rear of the shaft and in front of the shaft so that the sectional area is smaller than that of the front and rear members.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIG.
First, the arm 6 having a flange having a hole formed in the center at the tip of the hollow pipe is provided. Next, a finger support frame 3 including two parallel plates having through holes at the tip and a flange having a hole at the center is provided. A bearing 8 is attached to the tip of the arm 6 so that the rod 5 can slide in the axial direction in the arm 6.
The rod 5 is supported via the bearing 8. The flange of the arm 6 and the finger support frame 3 so that the finger support frame 3 is attached to the tip of the arm 6.
The flange of is fixed with the bolt 7.

A pair of fingers 1 having a claw portion in contact with the workpiece 11 at the tip, a hole for inserting the shaft 2 near the center, and a hole for inserting the pin 9 at the rear end are provided. The shaft 2 is inserted into the pair of fingers 1 so that it can be opened and closed like scissors, and both ends of the shaft 2 are inserted into the holes of the finger support frame 3 and fixed. The rear end of each finger 1 and the tip of the rod 5 are connected via the link plate 4 and the pin 9. The hole 10 is formed between the rear of the claw portion of the tip of the finger 1 that comes into contact with the workpiece 11 and the hole near the center where the shaft 2 is inserted.

The operation of the constituent elements will be described below. Stick 5
Moves forward from the retracted state, the link mechanism moves the finger 1 from the open state to the closed state, and when the high-temperature workpiece 11 is gripped, the heat of the workpiece 11 from the contact surface with the workpiece 11
It is transmitted to finger 1. In general, the basic equation for heat conduction is q =
It is represented by −λA (dt / dx). Here, q is the amount of heat that moves per unit time, λ is the thermal conductivity, dt / dx is the temperature gradient, and A is the cross-sectional area perpendicular to the heat flow of the heat-conducting object. When the heat transferred to the finger 1 reaches the processed portion of the hole 10, the cross-sectional area of the finger 1 sharply decreases, so that the heat is hard to be transferred to the rear of the hole 10. At the same time as this heat insulation effect,
Since the contact area of the finger 1 with the atmosphere is expanded by processing the hole 10, the heat accumulated at the tip of the finger 1 can be radiated to the outside air. As you can see, there is a hole in finger 1
By performing the 0 machining, the heat insulating effect and the heat radiating effect can be obtained at the same time, so that the constituent elements after the machining of the hole 10 can be protected from heat.

[0008]

As described above, by making a hole in a finger, heat transmitted from the workpiece to the finger is less likely to be transmitted to the fingers after the hole forming portion, and at the same time, heat is transmitted to the atmosphere in the hole forming portion. It can dissipate heat to. Therefore, the supply device main body can be protected from heat. Further, since the finger and the nail can be integrally manufactured, the finger and the nail are not fixed with the bolt through the thin heat insulating material. Therefore, a gripper can be obtained in which the heat insulating material is cracked or the bolts are loosened, the claws move, and the work piece is not gripped or dropped.

[Brief description of drawings]

FIG. 1 is a cutting model diagram showing an internal structure of the present invention.

FIG. 2 is a cutting model diagram showing an internal structure of a conventional example.

[Explanation of symbols]

 1 Finger 2 Axis 3 Finger Support Frame 4 Link Plate 5 Bar 6 Arm 7 Bolt 8 Bearing 9 Pin 10 Hole 11 Workpiece

Claims (1)

[Claims] 1. In a gripper for gripping a high-temperature object, a through-hole is provided in a member in front of the shaft behind a portion of a pair of fingers arranged to oppose each other so as to be openable and closable via a shaft, in contact with the object to be gripped. And has a smaller cross-sectional area than the front and rear members, for gripping high-temperature objects