JPH0526208A - High speed working fluid pressure cylinder device - Google Patents

Abstract

PURPOSE:To operate a driven member at a high speed by fitting a piston into a tube while fixing a piston, providing a plurality of fixed and movable pulleys out the fixed and movable sides opposingly to each other, fixing one end thereof to the fixed part, winding the other end of the wires alternately around the movable and the fixed pulleys, and connecting them to the driven member. CONSTITUTION:Pressurized air is supplied to a piston chamber 9 on a left side of an air cylinder 1, and discharged from a piston chamber 9 on a right side thereof. A cylinder tube 2 is moved leftward by a distance L/2. Then, Bilateral movable pulley groups 22a, 22b provided on time cylinder tube are moved in the same direction by a same distance. connection ends of right and left wires 24b, 24a to a table 15 are pulled rightward, paid out for driving the table 15 in a right direction of 5L. A ratio of pay-out and pulling of the wires 24a, 24b in respect to a movement distance of the cylinder tube 2 is a multiple of numbers of the wires 24a, 24b wound around the movable pulleys 22a, 22b and extended in a moving direction of the cylinder tube 2, for instance, ten times of the numbers.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fluid pressure cylinder device for high speed operation which is operated at high speed with a low load such as when a cutter for cutting paper, cloth, sheets, etc. is attached and driven. ..

[0002]

2. Description of the Related Art Conventionally, as a fluid pressure cylinder device of this type, as disclosed in Japanese Utility Model Publication No. 1-17723, a fluid pressure cylinder device in which a piston rod is fixed and a tube side is reciprocated is disclosed. , A pair of sprockets are attached to the front and rear ends of the tube, and an endless chain is laid over it, and one of them is fixed to a fixing member such as a frame, and the half circumference of the fixing point is parallel to the axis of movement of the cylinder. It is known that the driven member is connected to a driven member that is freely movable along the guide, and the driven member is moved with a stroke that is twice the stroke of the tube.

[0003]

However, the above-mentioned conventional device has at most a double stroke, in other words, 2 strokes.
If only a double operating speed is obtained and the driven member is to be operated at a high speed, the tube must also be driven at a correspondingly high speed. When driving the tube at high speed,
In particular, the piston ring and the seal ring between the end cover of the tube and the rod are easily worn at an early stage, and further improvement has been desired from the viewpoint of durability.

[0004]

The fluid pressure cylinder device for high-speed operation of the present invention has been devised in view of such circumstances, in which the piston is slidably fitted in the tube. Fix either the tube or the piston,
A driven member that is free to move along a guide parallel to the moving axis of the fluid pressure cylinder is provided on the side of the fluid pressure cylinder that can move the other, and multiple fixed pulleys are moved to the fixed side of the tube and piston. Side, a plurality of movable pulleys are provided so as to oppose each other in the direction of the movement axis of the fluid pressure cylinder, and one end of the wire fixed to the fixed member is alternately hung over the movable pulley and the fixed pulley to the driven member. Combined configuration.

[0005]

When the moving side member, which is one of the tube and the piston, moves due to the supply and discharge of the pressurized fluid to and from the fluid pressure cylinder, the movable pulley attached to the moving side member moves the same distance, and the wire moves accordingly. The driven member is pulled and driven along the guide. At that time, the ratio of the pulling length of the wire to the moving distance of the moving side member of the cylinder is equal to the number of wires wound around the movable pulley and extending in the moving axis direction of the cylinder. Being an individual,
Since there are two wires extending for each, the total becomes 2n times. As a result, when the moving member of the cylinder moves with the stroke L, the driven member is driven with the stroke 2nL which is significantly longer than that.

[0006]

According to the present invention, the driven member can be operated with a long stroke, in other words, at a high speed, by slightly moving the moving side member of the fluid pressure cylinder.
The fact that the cylinder side can be driven with a short stroke, that is, at a low speed, reduces the wear of the cylinder seal parts, which can significantly extend the service life, and also makes the cylinder itself compact. There is an effect that can be done.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the accompanying drawings. Reference numeral 1 denotes a double rod type air cylinder. As shown in FIG. 3, a piston 3 having rods 4 projecting on both sides is slidably fitted in a cylinder tube 2 so that both rods 4, End covers 5 on both ends of the tube 2
The tip protruding outward from the center hole 6 of the
And a supply / discharge path 10 for pressurized air reaching the left and right piston chambers 9 is formed in each rod 4, and the left and right piston chambers 9 are connected from the supply / discharge port 11 at the tip of each rod 4. By alternately supplying and exhausting the pressurized air, the cylinder tube 2 reciprocates left and right with the rod 4 as a guide.

Above the air cylinder 1, a guide bar 13 parallel to the moving direction of the cylinder tube 2 is provided on both mounting plates 8.
It is passed over and fixed between the guide bars 13,
The slide table 15 is slidably fitted.

On the corresponding inner surfaces of the left and right mounting plates 8,
Brackets 18 having shafts 17 extending in the direction perpendicular to the moving direction of the cylinder tube 2 are attached to the left and right shafts 17, respectively, and five fixed pulleys 19a and 19b are arranged side by side, respectively, and are freely rotatably supported. There is.

On the upper surface of the cylinder tube 2, two brackets 21 on the left and right, which are provided with a shaft 20 oriented in the same direction as the shaft 17, are attached, and each of the shafts 20 has five movable pulleys 22a. 22b are arranged side by side so as to face the fixed pulleys 19a or 19b, and are rotatably supported by the respective separate pulleys.

Then, the other end of the left wire 24a, one end of which is fixed to the left side surface of the table 15, is once pulled out from the through hole 26 of the left mounting plate 8 to rotate the turning roller 27, and then the through hole. 28, it is pulled out to the inside of the mounting plate 8 again, and as shown in FIG. 2, the movable pulley 22a on the left side and the fixed pulley 19b on the left side are alternately wound around from the back side, and the fixed pulley 19a on the foremost side is provided. It is fixed to the right side mounting plate 8 on the opposite side.

The right wire 24b, one end of which is fixed to the right side surface of the table 15, is pulled out to the outside from the through hole 26 of the right mounting plate 8 so as to be symmetrical with the above-mentioned left wire 24a, and then the turning roller. After turning 27, mounting plate 8
Of the movable pulley 22b on the right side and the fixed pulley 19b on the right side, which are alternately hung from the inner side, and then come out of the fixed pulley 19b on the front side to the mounting plate 8 on the left side on the opposite side. It is fixed.

Next, the operation of this embodiment will be described based on the principle diagram of FIG. Piston chamber 9 on the left side of the air cylinder 1
When the cylinder tube 2 is moved leftward by a distance L / 2 as shown by the chain line in the figure, by supplying pressurized air to and discharging the air from the right piston chamber 9,
Left and right movable pulleys 22a, 22b attached to it
The groups respectively move in the same direction by the same distance, the connecting end of the right side wire 24b with the table 15 is pulled rightward, and the connecting end of the left side wire 24a with the table 15 is extended in the same direction. 15 is driven rightward along the guide bar 13.

At this time, the ratio of the pulling length and the feeding length of the wires 24b and 24a to the moving distance of the cylinder tube 2 is determined by the movable pulley 22b of the wires 24b and 24a.
Since the number of the movable pulleys 22b and 22a is five, each of which is wound around 22a and extends in the moving direction of the cylinder tube 2, and each of which has two movable pulleys 22b and 22a.
× 2 = 10 times, and the moving distance of the table 15 is (L
/ 2) × 10 = 5L.

On the contrary, when the cylinder tube 2 is moved to the right from the position shown by the solid line in FIG. 3 by the moving distance L / 2, the connecting end of the left wire 24a with the table 15 is pulled leftward, and the table of the right wire 24b is pulled. The connection end with 15 is extended in the same direction, and the table 1
5 moves 5L to the left.

That is, when the cylinder tube 2 reciprocates left and right with the stroke L, the table 15 moves to its 10th position.
It is driven with a double stroke 10L, and 10 times higher speed operation is realized.

As described above, the table 15 operates at a high speed, but the cylinder tube 2 moves at a low speed for a short distance. Therefore, the piston ring 30 fitted to the outer periphery of the piston 3 and the center of the end cover 5 of the tube 2 are moved. The seal ring 31 fitted in the hole 6 has a long life.

Of course, the higher the number of movable pulleys 22a, 22b and the number of fixed pulleys 19a, 19b facing them, the higher the double speed can be obtained.

Further, the present invention can be applied to a case where the cylinder tube side of the air cylinder is fixed and the piston rod is moved, and the present invention can be applied not only to the double rod type but also to the single rod type. Also, a rodless cylinder in which a longitudinal slit is formed on the outer surface of the cylinder tube, and a sliding portion protruding from the outer circumference of the piston is protruded from the slit so that the sliding portion reciprocates along the slit groove. Can be similarly applied to. Of course, the present invention is not limited to the air type, but can be widely applied to other types of fluid pressure cylinders such as a hydraulic type.

[Brief description of drawings]

FIG. 1 is an external perspective view of an embodiment of the present invention.

FIG. 2 is an explanatory diagram of a wire installation state.

FIG. 3 is an explanatory diagram of an operation principle of the present embodiment.

[Explanation of symbols]

1: Air cylinder 2: Cylinder tube 3: Piston 4: Rod 8: Mounting plate 10: Supply / discharge path 13: Guide bar 15: Table (driven member) 19a, 19
b: fixed pulley 22a, 22b: movable pulley 24
a: left side wire 24b: right side wire 30: piston ring 31: seal ring

Claims (1)

Claim: What is claimed is: 1. A piston is slidably fitted in a tube to fix either one of the tube and the piston, and the other side is movable to the side of a fluid pressure cylinder. A driven member that is free to move along a guide parallel to the moving axis of the fluid pressure cylinder; a plurality of fixed pulleys on the fixed side of the tube and the piston; a plurality of movable pulleys on the moving side; It is characterized in that it is provided so as to face each other in the moving axis direction of the cylinder, and the other end of the wire whose one end is fixed to the fixed member is alternately laid over the movable pulley and the fixed pulley to be coupled to the driven member. Fluid pressure cylinder device for high speed operation.