JPS635236B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for carrying a piston ring having a joint into or out of a processing machine, and more particularly to a device capable of gripping and moving a piston ring.

A piston ring is a thin circular ring having an abutment in a free state, and becomes a perfect circle when the abutment is closed, and has an outer tension. Therefore,
When carrying it into or out of a processing machine, it was necessary to close the joint and then install it. In the past, the piston ring was passed through a lapper-shaped jig that made the piston ring a perfect circle at the smallest diameter part, and the piston ring was clamped from above and below and carried out to a processing machine. At the same time as the piston ring is fed out, a device is used which gradually narrows the width in the feeding direction and closes the piston ring. In such conventional devices, scratches may occur on the upper and lower surfaces and the outer peripheral surface of the piston ring due to friction, and the piston ring, which is a thin ring, may bend due to strong local stress. Ta.

Furthermore, when removing piston rings from a horizontal machine, the method of dropping them using gravity is usually used, so it is impossible to prevent the piston rings from getting tangled with each other and causing scratches on the piston rings. Also, changing the direction of the piston ring required a complicated mechanism.

The present invention not only solves these drawbacks, but also can be applied to various types of piston rings, and more particularly, can stably carry piston rings into and out of horizontal processing machines.

Furthermore, the present invention basically uses a gripping device that combines a cylinder or piston that moves back and forth using hydraulic pressure, and an arm that closes and opens by rotation, and this gripping device was invented to be suitable for piston rings. .

DESCRIPTION OF THE PREFERRED EMBODIMENTS In the following, embodiments of the present invention will be shown in FIG. 1 and subsequent figures, and will be described in detail.

First, the gist of the present invention resides in a piston ring gripping device characterized by having the following five configurations, as described in the claims.

It has a reciprocating and rotatable main shaft having a spiral groove 52 on its outer periphery.

At one end of the main shaft, a plurality of shoes 33, 34 of an annular member 32 are connected to a piston 31 of a second cylinder 3 fixed to a bearing stand 90 on the outside thereof.
35, and one end of the main shaft 5 is connected to the arm base 1.

A key 94 that fits into the spiral groove 52 of the main shaft is fixed to a bearing stand 90 that supports the main shaft 5.

A working chamber 20 of the first cylinder 2 is formed in the main shaft 5, and the piston 21 of the first cylinder is connected to the push plate 6.
to be combined with

The push plate 6 has a groove 6 into which the end 41 of the arm 4 rotatable around the pin 11 of the arm base 1 is fitted.
Must have 4.

Next, FIGS. 1 and 1 show one embodiment of the present invention.
The structure and operation of the present invention will be described in detail with reference to FIG. 2, which is a sectional view taken along line XX in the figure.

A bearing stand 90 for the main spindle 5 is fixed on a base (not shown), and the main spindle 5 is supported by a bearing 92. The main shaft 5 is provided with a spiral groove 52 on its outer periphery, and a key 94 fixed to a bearing 92 engages with the spiral groove 52, so that rotation is applied to the main shaft 5 as the main shaft 5 moves in the axial direction. On the other hand, the main body 30 of the second cylinder 3 is fixed to the bearing stand 90, and the piston 31 of the second cylinder 3 is fixed to the bearing stand 90.
is coupled to the annular member 32.

A through hole 50 for supplying fluid to the first cylinder 2 is bored in the main shaft 5, an annular groove 53 is formed at one end, and an operating chamber of the first cylinder communicates with the through hole 50 inside the main shaft 5. 20 is formed. In this case, the rotary plate 51 is coupled to the main shaft 5 due to design factors such as ease of assembly as shown in FIG.
Preferably, an annular groove 53 is formed in the cylinder, and a space surrounded by the rotating plate 51 and the main shaft 5 is formed as the working chamber 20 of the first cylinder.

Further, an annular groove 53 provided in the main shaft 5 or the rotary plate 51
Shoes 33, 34, and 35 that are coupled to the piston 31 of the second cylinder are connected to the shafts, and when these shoes 33, 34, and 35 come into contact with the annular groove 53, the piston 31 of the second cylinder is The main shaft 5 or the rotary plate 51 is rotatably assembled while transmitting forward and backward movement to the main shaft 5. More preferably in this case, as shown in FIGS. 1 and 2, a plurality of front shoes 33 are brought into contact with one side 531 of the annular groove 53, and a plurality of rear shoes 34 are brought into contact with the other side 532, and A plurality of radial shoes 35 are brought into contact with the groove bottom 530 to eliminate looseness in the axial and radial directions and to ensure a firm connection. Normally, it is desirable to install two to three of each of these front, rear, and radial shoes 33, 34, and 35.

The working chamber 20 of the first cylinder 2 is provided with a through hole 50 bored in the main shaft and a fluid injection hole 54, and the piston 21 moves forward and backward by supplying fluid under pressure through these holes. Piston 21 of the first cylinder
is combined with a push plate 6, and the push plate 6 is provided with a groove 64 into which the end 41 of the arm 4 is fitted, and the arm 4 is rotated to open and close about the pin 11 as the push plate 6 moves back and forth.

As shown in FIG. 1, the arm 4 has a cylindrical member 43 made of bearing steel at its end, which is fixed by, for example, welding, so that the arm 4 makes smooth sliding contact with the push plate 6 and has excellent durability. Furthermore, at the tip of the arm 4, there is a V-shaped pad 7 at the part that comes into contact with the piston ring 8.
1 is assembled, and the position of the gripping claw 7 is adjusted according to the size of the piston ring 8.

Next, FIG. 3 shows a state in which the first and second cylinders are operated from the state shown in FIG. 2 according to the present invention. FIG. 3 shows a state in which the piston 31 of the second cylinder is retracted to the end, and fluid is further supplied from the through hole 50 of the main shaft 5 to advance the piston 21 of the first cylinder.As the main shaft 5 retreats, the spiral groove 52 Accordingly, the main shaft rotates (90 degrees in the example diagram), and the arm 4 further opens. In this case, the stopper 17 provided on the arm base 1
When the push plate 6 hits, the degree of opening is controlled.

When using the piston ring gripping device of the present invention, for example, when taking out a piston ring from a processing machine, after advancing the arm base 1 of the gripping device to the processing machine, the piston ring is held by the first cylinder 2. 8, move the piston 31 of the second cylinder backward while holding the piston ring 8 in the state shown in Fig. 1, and at the same time change the direction of the vertically arranged piston rings horizontally and transport them to the open position of the piston rings. Next, the first cylinder 2 is moved forward, the arm 4 is opened (the state shown in FIG. 3), and the product is supplied to a delivery device (not shown). Conversely, when attaching the piston ring 8 to a processing machine, the piston ring 8 placed in a fixed position (the state shown in Fig. 3) is grasped and closed by the operation of the first cylinder 2, and then the second cylinder 3 is operated. and transport it to the predetermined position of the processing machine.
After the piston ring is clamped by the clamping device of the processing machine (not shown) (the state shown in FIG. 1), the first cylinder 2 is activated to open the arm 4, and the second cylinder 3 is activated to move the gripping device to a predetermined position. Return.

As another embodiment of the present invention, as a means for returning the piston 21 of the first cylinder 2, a spring 16 is disposed between the push plate 6 and the stopper 17 of the arm base 1, as shown in FIG. It is also possible to apply a force for closing the arm by pushing the push plate 6. If such a spring 16 is used, stable operation can be achieved because the piston ring is closed with a constant force.

As described above, the piston ring gripping device of the present invention not only allows the piston ring to be attached to and removed from a processing machine by changing the direction of the piston ring, but also has a structure in which the main shaft is provided with a spiral groove, thereby allowing the main shaft itself to rotate. Moreover, since the second cylinder for forward and backward movement and the main shaft are connected by multiple shoes and an annular groove, it is structurally strong and can be easily adjusted for various types of piston rings. be.

In the embodiments of the present invention, the helical groove is formed at 90 degrees, but it is also possible to change the direction by 180 degrees with a piston ring having a tapered outer circumferential surface, and the helical groove angle can be changed depending on the purpose. is subject to change.

[Brief explanation of the drawing]

Figure 1: Cross-sectional view showing the present invention and embodiments, Figure 2
Figures: XX sectional view of FIG. 1, FIG. 3: sectional view showing the operation of the present invention, and FIG. 4: sectional view showing another embodiment of the present invention. Explanation of the numbers, 1...Arm base, 11...Pin, 5...Main shaft, 16...Spring, 51...Rotary plate, 2...First cylinder, 52...Spiral groove,
21... Piston, 53... Annular groove, 3... 2 cylinders, 6... Push plate, 31... Piston, 7...
...Gripping claw, 32...Annular member, 90...Bearing stand,
33, 34, 35...Show, 94...Key, 4
……arm.

Claims (1)

[Scope of Claims] 1. It has an arm that opens and closes according to the operation of the first cylinder, and the arm moves back and forth and rotates at the same time as the operation of the second cylinder, and grips the piston ring.
It is a piston ring gripping device for releasing and moving back and forth, and has a reciprocating and rotatable main shaft 5 having a spiral groove 52 on the outer periphery, and one end of the main shaft 5 is fixed to a bearing stand 90 on the outside thereof. An annular groove 53 is formed in contact with the plurality of shoes 33, 34, 35 of the annular member 32 connected to the piston 31 of the second cylinder 3, and one end of the main shaft 5 is connected to the arm base 1. The key 9 is fitted into the spiral groove 52 on the bearing stand 90 supporting the key 5.
4, and forms the working chamber 20 of the first cylinder 2 in the main shaft 5, and the piston 21 of the first cylinder fits the end 41 of the arm 4 rotatable around the pin 11 of the arm base 1. A piston ring gripping device characterized in that it is combined with a push plate 6 having a groove 64 for mounting. 2. The shoes 33, 34, and 35 are a front shoe 33 that contacts one side 531 of the annular groove 53, a rear shoe 34 that contacts the other side 532, and a radial shoe 35 that contacts the groove bottom 530, respectively. A piston ring gripping device according to claim 1. 3. The rotating plate 51 is coupled to one end of the main shaft 5,
2. The piston ring gripping device according to claim 1, wherein the rotating plate is provided with an annular groove 53, and a space surrounded by the rotating plate and the main shaft is used as the working chamber 20 of the first cylinder 2. 4. Claim 1, characterized in that the distal end 41 of the arm 4 is formed by fixing a cylindrical member 43 made of bearing steel, and the distal end 42 is fitted with a gripping claw 7 of a piston ring. The piston ring gripping device described. 5. The piston ring gripping device according to claim 1, characterized in that a spring 16 is disposed between the tip of the push plate 6 and the arm base 1.