JPH10176702A - Screw motion cylinder and screw motion output device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a screw motion cylinder to output smooth screw motion and enlarge use application, and a screw motion output device having the screw motion cylinder described above. SOLUTION: A screw motion cylinder 1 is constituted such that rotation is exerted on a rotary rod 23 and screw motion is outputted by sliding pistons 3 and 12 over the internal part of a cylinder tube 2 through the magnetic force of a male magnetic screw 26 formed on the outer periphery of a rotary rod 23, the rotary rod 23 rotatably charged in a rod pipe 21 fixed at a piston 3 in a state to protruded from one end of a cylinder tube 2, and a female magnetic screw 27 formed in the inner peripheral surface of a through-hole formed in the end part of the cylinder tube 2 through which the rod pipe 21 is extended.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a helical motion cylinder which converts a sliding of a piston into a helical motion and outputs the helical motion, and a helical motion output device having the helical motion cylinder.

[0002]

2. Description of the Related Art Hitherto, a spiral motion cylinder which outputs a spiral motion for simultaneously performing a rotary motion and a linear motion has been used for various devices such as a robot hand or a stirrer. As a conventional example, there is a technique disclosed in Japanese Patent Publication No. 49-41550. FIG. 12 and FIG. 13 are cross-sectional views showing a spiral movement cylinder disclosed in this publication, and are used for a robot hand. The robot hand 102 is provided integrally with a piston 103 that slides in a cylinder.
Numeral 03 is slidably loaded in a hollow cylinder tube 104. A guide rod 105 is fixed at the center of the cylinder tube 104, and a guide groove 106 is formed on the outer periphery of the guide rod 105. A guide ball 109 is held on the inner surface of the piston 103 so as to be rotatable with respect to the guide groove 106. The guide ball 109 is always at a fixed position with respect to the piston 103. The piston 103 is urged upward by a return spring 107, and a hydraulic pressure supply port 108 is formed at a position above the piston 103.

The conventional spiral motion cylinder 101 having such a structure operates as follows. First, FIG.
When the hydraulic oil is not supplied to the hydraulic pressure supply port 108, the piston 103 is biased by the return spring 107 and is positioned above the hollow portion of the cylinder tube 104 as shown in FIG. At this time, the robot hand 102 is at a position farthest from the cylinder tube 104. The guide ball 109 is located at the upper end of the guide groove 106, and the robot hand 102 is on the plane as shown in the figure.

Next, as shown in FIG. 13, when hydraulic oil is supplied to the hydraulic pressure supply port 108, the piston 103
Is pressed downward. At this time, the robot hand 102
Is located closest to the cylinder tube 104. Further, the guide ball 109 is at the lower end of the guide groove 106, and the robot hand 102 is rotated to a position perpendicular to the figure. Here, when the robot hand 102 moves from the position of FIG. 12 to the position of FIG.
02 in the vertical direction and the position in the rotational direction of the robot hand 102 are both the guide groove 106 and the guide ball 1.
09, the vertical movement and the rotational movement of the robot hand 102 are accurately synchronized.

[0005]

However, the conventional helical cylinder has the following problems. That is, since the guide ball 109 rotates in the inner hole of the piston 103 and rolls along the guide groove 106, abrasion powder is generated at a rolling portion or the like, and the abrasion powder cuts the hole or groove. Also, the guide ball 109 may be scratched, and the robot hand 102
However, there has been a problem that the rotational motion and the vertical motion, that is, the helical motion is not smooth. Further, since the conventional example generates abrasion powder, there is also a limitation in use such that it is not suitable for use in a semiconductor manufacturing apparatus or the like requiring work in a clean state.

In order to solve the above problems, the present invention provides a spiral motion cylinder capable of smoothly outputting a spiral motion and expanding its use, and a spiral motion cylinder having such a spiral motion cylinder. It is an object to provide an output device.

[0007]

A helical motion cylinder according to the present invention devised to solve the above-mentioned problem comprises a piston cylinder in which a piston is slidably mounted in a cylinder tube, and a cylinder projecting from one end of the cylinder tube. A rod-shaped hollow cylindrical rod pipe fixed to the piston, a rotatable rod rotatably mounted in the rod pipe, and a helical magnetized band formed on the outer periphery of the rotatable rod. A male magnetic screw, and a female magnetic screw consisting of a helical magnetized band formed on the inner peripheral surface of an end through hole of the cylinder tube through which the rod pipe has penetrated, and the piston passes through the inside of the cylinder tube. The sliding rod performs a spiral movement by sliding. It is preferable that the helical motion cylinder of the present invention has a detent rod that penetrates the piston in the sliding direction in the cylinder tube.

The helical motion output device according to the present invention is connected to each of the pressure chambers divided in the sliding direction by the piston in the cylinder tube, and supplies the working fluid from the working fluid supply source to the pressure chamber. A two-position switching valve for switching between two pressure chambers;
A changeover switch for controlling switching of the position changeover valve. In addition, the spiral motion output device,
The two-position switching valve is a pilot type four-port valve or a five-port valve.
It is preferable that the changeover switch has a three-port valve that detects a sliding position of the piston and switches the working fluid to a pilot port of the two-position changeover valve.

In the helical motion output device of the present invention, the changeover switch holds a magnet for the magnet fixed to the outer periphery of the piston, and is disposed on the outer periphery of the cylinder tube so as to be movable in the axial direction. It is desirable to have an outer slider and a mechanical three-port valve or a three-port solenoid valve that switches the valve in conjunction with the contact of the outer slider that follows the sliding of the piston. It is preferable that the helical motion output device of the present invention has a support rod that penetrates the outer slider in a sliding direction of the piston.

[0010] In the helical motion cylinder of the present invention having such a configuration, when the piston slides under the pressure of the working fluid supplied into the cylinder tube, the rod pipe fixed to the piston moves in the axial direction. At this time, the rotating rod loaded in the rod pipe has a magnetic force generated between a male magnetic screw formed on the outer periphery thereof and a female magnetic screw formed on the inner peripheral surface of the through hole at the end of the cylinder tube. Rotation is provided, which allows a smooth helical motion output from the rotating rod by axial movement by the piston and rotation by the magnetic screw. In addition, since the helical motion is output by the working fluid supplied into the cylinder tube, it is safe to agitate volatile liquids, etc. In addition, there is almost no generation of abrasion powder, so it is suitable for clean work. Its use can be expanded. Further, in the spiral motion cylinder of the present invention, since the piston slides in the cylinder tube without rotating by having the rotation stopping rod penetrating the piston, a smoother spiral motion output by the rotating rod is obtained. Can be

On the other hand, in the helical motion output device having such a configuration, the sliding position of the piston is detected at a predetermined position by the changeover switch, and the two-position switching valve is switched, and the switched two-position switching valve is used by the switched two-position switching valve. The working fluid from the working fluid supply source is supplied to one pressure chamber of the spiral movement cylinder having the spiral movement cylinder, and the spiral movement output of the spiral movement cylinder is controlled.

Further, in the spiral motion output device of the present invention, a three-port valve, particularly, a mechanical
The valve is switched by detecting the sliding position of the piston by contact of the port valve or the 3-port solenoid valve with the outer slider that follows the piston by, for example, a magnet, and by switching the 3-port valve, the valve is switched from the working fluid supply source. Is supplied to a predetermined pilot port of a four-port or five-port valve which is a two-position switching valve, and
A working fluid from a working fluid supply source is supplied to one pressure chamber of the spiral motion cylinder via the two-position switching valve,
The spiral movement output of the spiral movement cylinder is controlled. In the spiral movement output device of the present invention, the outer slider is supported by the support rod penetrating in the sliding direction of the piston to perform stable movement, whereby the position of the piston is accurately detected, and the outer cylinder of the spiral movement cylinder is moved. The helical motion output is controlled.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of a spiral movement cylinder according to the present invention will be described in detail with reference to the drawings. 1 to 3 are cross-sectional views showing a first embodiment of a spiral motion cylinder. In particular, FIGS. 1 and 2 are cross-sectional views taken along the line AA of the cylinder end surface shown in FIG. 4, and FIG. That B
-It is a B section. FIG. 1 shows one operation state of the spiral movement cylinder, and FIG. 2 shows another operation state. The spiral movement cylinder 1 has a piston 3 slidably mounted in a cylinder tube 2. The cylinder tube 2 has a rod cover 4 fixed at one end and a head cover 5 fixed at the other end, and is closed. Therefore, the pressurizing chambers 6 and 7 divided into two by the piston 3 loaded in the cylinder tube 2 are formed.
Compressed air is supplied to the pressurizing chambers 6 and 7 as a working fluid.
And the head cover 5. The rod cover 4 and the head cover 5 fixed to both ends of the cylinder tube 2 are both made of a rectangular plate as shown in FIG.
., And are fixed at four corners thereof with bolts 11, 11.

The disc-shaped piston 3 loaded in the cylinder tube 2 has a cylindrical holding portion 3a formed on the pressurizing chamber 6 side, and a female threaded fixed portion formed on the pressurizing chamber 7 side. 3b is formed. A piston packing 14 and a magnet ring 16 are fitted around the circumference of the piston 3, and the auxiliary piston 12 is fitted to the fixing portion 3 b so as to press the magnet ring 16 and is fixed by a nut 13. A wear ring 15 made of an oil-free bearing material is fitted on the circumference of the auxiliary piston 12 in order to avoid applying excessive surface pressure to the magnet ring 16. The piston 3 and the auxiliary piston 12 are axially penetrated by a pair of detent rods 17, 17, as shown in FIG.
Rotation inside is prevented. This detent rod 17,
17 is a rod cover 4 and a head cover 5
It is fixed to

On the other hand, one end of a rod pipe 21 penetrating the rod cover 4 is fixed to the outer periphery of the holding portion 3a of the piston 3. This rod pipe 21 has 0.2
It is formed of a non-magnetic material having a thickness of mm, and in the present embodiment, stainless steel is used. Also, at the tip of the rod pipe 21 protruding from the rod cover 4,
A tubular pipe end 22 is attached. A rotating rod 23 is loaded in the hollow interior of such a rod pipe 21. The rotating rod 23 is supported by bearings 24 and 25 fitted on the inner periphery of the holding portion 3 a and the inner periphery of the pipe end 22, and is configured to be rotatable within the rod pipe 21. In addition, the rod pipe 21
The rotating rod 23 loaded therein has an end protruding from the pipe end 22, and has a mounting end 23a for mounting an arm, a propeller or the like to transmit, for example, a helical motion.

The helical motion cylinder 1 of the present embodiment employs a magnetic screw as a characteristic configuration for converting the axial movement of the piston 3 into a helical motion. Screw 26 is rotating rod 23
And one female magnetic screw 27 is formed on the rod cover 4. Next, the configurations of the male magnetic screw 26 and the female magnetic screw 27 will be described in detail. Here, FIG. 5 is an exploded perspective view showing the configuration of the male magnetic screw 26 and the female magnetic screw 27. However, the rod pipe 21 is originally arranged between the male magnetic screw 26 and the female magnetic screw 27 as shown in FIG. 1, but is omitted in the drawing.

As shown in FIG. 5, the male magnetic screw 26 is composed of a rotating rod 23 and a male cylindrical magnet 28 fitted and adhered to the outer periphery of the rotating rod 23. The rotating rod 23 is formed of a material having high magnetic permeability (for example, iron, iron oxide, nickel, cobalt, or an alloy or other compound containing these as a main component). The male cylindrical magnet 28
It is composed of a plurality of magnetized bands 29 formed in a spiral. Adjacent magnetization bands 29 have opposite magnetization polarities. That is, if the N pole is magnetized on the outer surface of a certain magnetized band 29, the S pole is magnetized on the outer surface of the adjacent magnetized band 29. Then male magnetic screw 2
As shown in FIG. 5, a magnetized band 29 in which N-poles and S-poles are alternately magnetized in a spiral shape is formed on the surface of 6 in an orderly manner.

On the other hand, the rod cover 4 has a cylindrical guide portion 4a projecting outward on the same axis as the cylinder tube 2, and a female magnetic screw corresponding to the male magnetic screw 26 is formed on the inner peripheral surface of the guide portion 4a. 27 are provided. Female magnetic screw 27
Is a hollow cylindrical female cylindrical magnet 30 as shown in FIG.
Is fixed to the inner periphery of a magnetic guide 31 formed from a highly magnetically permeable material (for example, iron, iron oxide, nickel, cobalt, or an alloy or compound containing these as a main component). On the inner circumference of the female magnetic screw 27, as shown in FIG. 5, a magnetized band 32 in which N poles and S poles are alternately magnetized in a spiral shape is formed.

The male cylindrical magnet 28 and female cylindrical magnet 30 having such a configuration have the following features.
That is, the mechanical strength is excellent. This is because the strength member can be inserted into the hollow portion or the periphery can be covered with the strength member. In the magnetic screw of FIG. 5, the rotating rod 23 and the magnetic guide 31 correspond to such a strength member. Since the mechanical strength is secured by this strength member, the male cylindrical magnet 2
The magnet 8 and the female cylindrical magnet 30 are excellent as a magnet material, but may be formed of a ferritic or rare earth-based material which is brittle in terms of material. If the strength member is made of a material having high magnetic permeability, the strong magnetic force of the male cylindrical magnet 28 and the female cylindrical magnet 30 can be used more effectively.

Next, the operation of the spiral motion cylinder 1 having the above configuration will be described. In FIG. 1, compressed air as a working fluid is supplied from a pressurizing port 8 to a pressurizing chamber 6, and a piston 3 and an auxiliary piston 12 (hereinafter, collectively referred to as pistons 3 and 12) move rightward in the drawing (direction E). The pressurized state is shown. When pressurized in the direction E in this way, the rod pipe 21 protruding from the cylinder tube 2
Is in a state of retreat. Then, pistons 3 and 12
When it slides to the predetermined position in the direction, the spiral motion cylinder 1
The supply of compressed air from the air pump is switched from the pressurizing port 8 to the opposite pressurizing port 9 by a switching valve (not shown). Such switching can be realized, for example, by detecting the position of the magnet ring 16 fitted on the piston 3 with a magnetic sensor and controlling the drive of an electromagnetic two-position switching valve.

When the compressed air of the working fluid is supplied from the pressurizing port 9 to the pressurizing chamber 7 and the pistons 3 and 12 are pressurized,
The pistons 3 and 12 are pressurized in the F direction (FIG. 2) and slide in the cylinder tube 2. At this time,
The pistons 3 and 12 that slide in the cylinder tube 2 are:
Since it is penetrated by the detent rods 17, 17, it does not rotate. When the pistons 3 and 12 slide in the F direction in the cylinder tube 2, the rod pipe 21 integrated therewith also moves in the F direction, and the rotating rod 23 loaded in the rod pipe 21 also moves in the F direction. Move in the direction. Then, the male magnetic screw 26 formed on the rotating rod 23 moves in the axial direction, and a part thereof is
Is rotated by the magnetic force acting on both of them, and a helical motion is generated from the rotary rod 23 by a combination of the linear motion and the rotary motion.

The rotation of the rotating rod 23 is controlled by the male magnetic screw 26.
This is because a magnetic force is generated between the magnetic tape and the magnetized bands 29 and 32 of the female magnetic screw 27, and the rotatable male cylindrical magnet 28 acts on the fixed female cylindrical magnet 30. That is, in the male magnetic screw 26 and the female magnetic screw 27, the spiral magnetized bands 29 and 32 of the N pole and the S pole are alternately magnetized, and the magnetized bands of opposite polarities are attracted to each other. Therefore, when the male magnetic screw 26 is moved in the axial direction, the two magnetized bands 2
The male magnetic screw 26 is rotated by the magnetic force acting on both of the magnetic poles 9 and 32 in order to correct the displacement. Therefore, the rotating rod 23 rotatably supported by the bearings 24 and 25 is rotated by the male magnetic screw 26 to rotate the G rod.
A rotational movement is provided in the direction (FIG. 2). At this time, the rod pipe 21 between the male magnetic screw 26 and the female magnetic screw 27 is made of a thin nonmagnetic material and does not affect the magnetic force that causes rotation.

Thereafter, when the pistons 3 and 12 slide in the direction F to a predetermined position, the position is detected and a switching valve (not shown) is driven, and the supply of compressed air from the air pump is again returned from the pressurizing port 9 to the opposite side. The pressure is switched to the pressure port 8. Accordingly, the compressed air as the working fluid is supplied from the pressurizing port 8 to the pressurizing chamber 6 to pressurize the pistons 3 and 12, while the compressed air in the pressurizing chamber 7 is released. Reference numeral 12 slides in the cylinder tube 2 in the direction E. Also at this time, as described above, the helical motion in the direction opposite to the previous case is generated in the rotary rod 23 by the linear motion in the E direction and the rotary motion in the H direction of the magnetic screws 26 and 27. Therefore, in the spiral motion cylinder 1 of the present embodiment, the pistons 3 and 12 slide by the compressed air supplied into the pressurizing ports 8 and 9,
The reciprocating spiral movement is given to the rotating rod 23. Thereby, the mounting end 23a at the tip of the rotating rod 23
The helical motion is output via an arm, a propeller, or the like (not shown) mounted on the device, so that it can be used as a robot hand or as a stirring device as in the above-described conventional example.

Therefore, according to the spiral motion cylinder 1 of the present embodiment having such a configuration, the piston 3, 3 slides in the cylinder tube 2, whereby the rotary rod 23 is given a spiral motion. Since the means for transmitting the rotational force is constituted by the male magnetic screw 26 and the female magnetic screw 27 and is non-contact, even when used for a long period of time, no abrasion powder or the like is generated, and the helical motion between the linear motion and the rotary motion is not generated. Can always be output smoothly. Further, since the rotating rod 23 for generating the spiral movement is loaded and provided in the rod pipe 21, the rotating rod 23 can perform a stable rotation even when immersed in the liquid tank, and the liquid is stirred. Use value has increased as a device.

In particular, the spiral motion cylinder 1 of the present embodiment
Outputs a helical motion, and the rotation rod 23
Since the propeller mounted on the tip moves from the upper surface to the lower surface in the liquid tank, the liquid can be stirred very efficiently. Further, since the spiral motion cylinder 1 outputs a spiral motion only by the compressed air supplied into the cylinder tube 2, it can be used safely even for volatile liquids that may explode. . Furthermore, the spiral motion cylinder 1 of the present embodiment can generate a large amount of abrasion powder by being twisted like a mechanical spiral output even if an overload is applied to the output spiral motion. There is no need to worry about heating and ignition as in electric motors.

Next, a second embodiment of the spiral motion cylinder and a spiral motion output device having the spiral motion cylinder will be described. 6 and 7 are cross-sectional views illustrating a spiral movement cylinder and a changeover switch according to the second embodiment. FIG. 6 illustrates one operation state of the spiral movement cylinder, and FIG.
FIG. 11 is a diagram showing another operation state. The helical motion cylinder 41 of the present embodiment has substantially the same configuration as that of the first embodiment. A piston 45 is slidably mounted in a cylinder tube 44 sealed by the rod cover 42 and the head cover 43 at both ends. Cylinder tube 4 divided into two by its piston 45
Pressurizing chambers 46 and 47 are formed in the pressurizing port 4, and pressurizing ports 4 indicated by dotted lines for supplying compressed air as a working fluid.
8 and 49 show the rod cover 42 and the head cover 43 in FIG.
It is formed on the upper surface (not shown in FIG. 7).

Here, FIG. 8 shows a cross section taken along the line CC of FIG.
As shown in this figure, both the rod cover 42 and the head cover 43 are made of a rectangular plate material, and tie rods 50, 50... The piston 45 loaded in the cylinder tube 44 has a cylindrical shape, and a cylindrical holding portion 45a is formed on the end surface on the pressurizing chamber 46 side. Further, the piston 45 has a step with a reduced diameter toward the pressurizing chamber 47 side, a piston packing 51 and a wear ring 52 are fitted in a large diameter part, and a strong magnet 53 is fitted in a middle diameter part. It is fixed by a nut 54 screwed into a male screw cut into a small diameter portion.

On the other hand, one end of a rod pipe 55 penetrating the rod cover 42 is fixed to the outer periphery of the holding portion 45a formed on the end face of the piston 45. The rod pipe 55 is made of a non-magnetic material having a thickness of 0.2 mm, and is made of stainless steel. At the tip of the rod pipe 55 protruding from the rod cover 42,
A pipe end 56 is attached. In the hollow interior of the rod pipe 55, both ends are bearings 5.
A rotating rod 59 supported by 7, 58 is rotatably mounted. The rotating rod 59 is connected to the pipe end 5.
A mounting end 59a is formed at one end protruding from 6. Incidentally, the male magnetic screw 60 constituting the magnetic screw is also provided in the spiral movement cylinder 41 of the present embodiment.
The female magnetic screw 61 is formed on the inner circumference of the guide portion 42 a of the rod cover 42 while being formed on the outer circumference of the rod cover 9. However,
The male magnetic screw 60 and the female magnetic screw 61 of the present embodiment
Since the configuration is similar to that shown in the first embodiment (see FIG. 5), a detailed description thereof is omitted.

Next, a description will be given of a helical motion output device for outputting helical motion from the helical motion cylinder 41 having the above configuration. First, the helical motion cylinder 41 outputs the helical motion in a reciprocating manner, and comprises the following changeover switch for switching the reciprocating motion in accordance with the sliding position of the piston 45. An outer slider 71 as shown in FIG. 9 is provided on the outer circumference of the cylinder tube 44. The lower surface of the outer slider 71 is curved along the outer peripheral surface of the cylinder tube 44 (see FIG. 8), and the upper surface is formed with a protrusion 71a having an inclined surface in the axial direction. On the lower surface of the outer slider 71, a strong magnet 72 similar to that fixed to the piston 45 is mounted as shown in FIG. The outer slider 71 has bearings mounted in through holes formed at both ends thereof along the axial direction, and the outer slider 71 is provided with a tie rod 5.
0 and 50 are provided so as to penetrate.

Further, support plates 75 and 76 are provided upright on the rod cover 42 and the head cover 43 of the spiral movement cylinder 41. A support beam 77 is bridged between the support plates 75 and 76, and three-port valves 81 and 82 related to the outer slider 71 are supported there. Here, FIG. 10 is an external perspective view showing the three-port valve 81. The three-port valves 81 and 82 are pivotally mounted with levers 85 and 86 having rollers 83 and 84 that come into contact with the protrusion 71a of the outer slider 71 at the tip.
Pins 87 and 88 which are pressed by the upward swing of the projection 6 project downward. Three-port valve 8 of the present embodiment
Numerals 1 and 82 are for switching the opening and closing of the valve by mechanical drive, and are configured so that pins 87 and 88 are linked to a valve (not shown), and each port is switched by raising and lowering the pins 87 and 88. is there. Since the structure of the three-port valves 81 and 82 is a general mechanical valve, a detailed description thereof is omitted, and only the symbols are shown in FIG. Then, the three-port valves 81, 82
Is disposed at a direction switching position of the piston 45.

Next, the spiral motion output device 9 of the present embodiment
1 will be described. Here, FIG.
FIG. 2 is a pneumatic circuit diagram showing a spiral motion output device 91. The spiral motion output device 91 of the present embodiment includes a spiral motion cylinder 41 and a spiral motion cylinder 41 as shown in the drawing.
5 for supplying compressed air to the pressurizing chambers 46 and 47
The above-mentioned outer slider 71 and the three-port valves 81 and 82 which constitute a changeover switch for detecting the drive position of the helical motion cylinder 41 and operating the changeover of the two-position changeover valve 92 by detecting the drive position of the spiral movement cylinder 41. It is formed from Since the two-position switching valve 92 is a general double-acting pilot type switching valve provided with a pilot operation port, its detailed description is omitted and only the symbols are shown.

In such a pneumatic circuit, the two-position switching valve 92 has a pressure port P1 connected to an air pump 93 serving as a working fluid supply source, and input / output ports A1 and B1 connected to the pressurizing port 49 of the helical cylinder 41, respectively. , 48. On the other hand, in the three-port valves 81 and 82, the input ports P2 and P3 are connected to the air pump 93, and the input / output ports A2 and A3 are connected to the pilot port p of the two-position switching valve 92.
1, p2. And the two-position switching valve 92
And the exhaust ports R11, R12 of the three-port valves 81, 82,
R21 and R31 are open.

The operation of the spiral motion output device 91 according to the present embodiment having such a configuration will be described below. First, when the outer slider 71 is not in contact with the rollers 83 and 84 in the case of the movement to the right side of the drawing (the direction I) from the state shown in FIG. 7 to FIG. The input ports P2 and P3 are shut off, respectively, and the input / output ports A2 and A3 are exhaust ports R21 and R31.
In communication with Therefore, since the compressed air from the air pump 93 does not drive the valve element of the two-position switching valve 92, the state of the two-position switching valve 92 at that time, that is,
The pressure port P1 connected to the air pump 93 communicates with the input / output port B1, while the input / output port A1 is connected to the exhaust port R1.
The state communicating with No. 11 is maintained. Therefore, in the spiral motion cylinder 41, the pressurizing port 46
Piston 4 pressurized by compressed air supplied to the inside
5 slides in the I direction, and the compressed air in the pressurizing chamber 47 flows from the pressurizing port 49 to the two-position switching valve 92 and is discharged from the exhaust port R11.

As described above, when the piston 45 slides in the direction I, the outer slider 7 is located outside the cylinder tube 44.
1 is the piston 4 due to the attractive force of the magnets 53 and 72.
5 will follow. Then, as shown in FIG. 6, the roller 84 of the three-port valve 82
Rolling following the inclination of the first projection 71a causes the lever 86 to swing, and the pin 88 to be pushed up. At this time, the valve of the three-port valve 82 is switched by pushing up the pin 88, and the input port P3 communicates with the input / output port A3 to close the exhaust port R31. Therefore, the air pump 9 flowing to the three-port valve 82
The compressed air of No. 3 is supplied to the pilot port p2 of the two-position switching valve 92, and the switching of the two-position switching valve 92 is performed. That is, in the two-position switching valve 92, the pressure port P1 connected to the air pump 93 is connected to the input / output port B.
1 is switched to communication with the input / output port A1, and the input / output port B1 is in a state of being connected to the exhaust port R12.

On the other hand, in the three-port valve 81, the input port P2 is still shut off, and the input / output port A2 is connected to the exhaust port R2.
It is in a state of communicating with 1. Therefore, the spiral motion cylinder 4
In 1, the compressed air from the air pump 93 is supplied from the pressurizing port 49 into the pressurizing chamber 46 via the two-position switching valve 92. At this time, the pressurizing port 48 of the pressurizing chamber 46 is open to the atmosphere from the exhaust port R12 of the two-position switching valve 92. Therefore, the piston 45 pressurized by the compressed air slides in the J direction (FIG. 7) in reverse, and the compressed air in the pressurizing chamber 47 flows from the pressurizing port 48 to the two-position switching valve 92, It will be discharged from the exhaust port R12. When the outer slider 71 moves in accordance with the sliding of the piston 45 in the J direction, the lever 86 that has been lifted up to that point swings and the pin 88 is lowered,
When the valve is switched again, the input port P
3, the input / output port A3 is in communication with the exhaust port R31. However, the main valve of the two-position switching valve 92 is held at that position by the friction of the piston packing, so that the compressed air is continuously supplied into the pressurizing chamber 47,
The piston 45 continues to slide in the J direction.

Then, the piston 45 slides in the J direction by a predetermined distance, and as a result, as shown in FIG.
When the roller 83 rolls according to the inclination of the protrusion 71a of the outer slider 71, the lever 85 swings and the pin 8
7 will be pushed up. At this time, the three-port valve 81 is switched by pushing up the pin 87, and the input port P2 and the input / output port A2 communicate with each other, so that the exhaust port R21 is closed. Therefore, the compressed air of the air pump 93 flowing to the three-port valve 81 is supplied to the pilot port p1 of the two-position switching valve 92, and the switching of the two-position switching valve 92 is performed. That is, 2
In the position switching valve 92, the pressure port P1 connected to the air pump 93 is switched to the communication from the input / output port A1 to the input / output port B1, and the input / output port A1 is connected to the exhaust port R11. Also, the 3-port valve 82
Is still in a state where the input port P3 is shut off and the input / output port A3 communicates with the exhaust port R31. Therefore, as described above, in the spiral motion cylinder 41, the compressed air is supplied into the pressurizing chamber 46, the piston 45 reverses and slides again in the I direction, and the compressed air in the pressurizing chamber 47 is discharged. The Rukoto.

As described above, in the helical motion output device 91 of the present embodiment, the compressed air supplied from the air pump 93 is supplied to the helical motion cylinder 4 by the three-port valves 81 and 82 and the outer slider 71 configured as changeover switches.
2-position switching valve 92 for switching to each of the pressurizing chambers 46 and 47
, The reciprocating motion of the piston 45 is automatically controlled. by the way,
In the spiral motion cylinder 41, the rod 45 integrally formed moves in the axial direction at the same time as the piston 45 slides in the cylinder tube 44. Therefore, the rotating rod 59 rotatably loaded in the rod pipe 55
Is rotated by the magnetic force of the male magnetic screw 60 and the female magnetic screw 61. The operation of the magnetic screw is the same as that described in the first embodiment, and will not be described here.

Therefore, according to the spiral motion output device 91 of the present embodiment having such a configuration, even when the device is used for a long period of time described in the first embodiment, the spiral motion is generated without generating abrasion powder and the like. That the output is always smooth, that the liquid is immersed in the liquid tank, and that efficient stirring of the liquid is possible.
It has become possible to control the continuous spiral motion output for driving the spiral motion cylinder 41 that exhibits an effect such as being able to safely use even volatile liquids that may explode. In particular, the pilot type 5 is provided for the two-position switching valve 92 for directly supplying compressed air to the spiral movement cylinder 41.
Since the port switch is used and the changeover switch for switching the valve is constituted by the outer slider 71 and the three-port valves 81 and 82, and the switching of the valve is operated by the compressed air, there is a risk of explosion. It can be used safely for liquids.

The helical motion cylinder and the helical motion output device according to the present invention have been described above. However, the present invention is not limited to such a device, and various changes can be made without departing from the spirit of the present invention. . For example, in the above-described embodiment, a pilot type 5-port valve has been described as an example of the 2-position switching valve, but an electromagnetic type having another electromagnetic valve or a 4-port valve may be used. Good. In the embodiment, the outer slider 71 and the three-port valve 81,
Although the changeover switch composed of 82 is shown, the magnet mounted on the piston shown in the first embodiment is detected by the magnetic sensor, and the 3-port solenoid valve provided instead of the 3-port valves 81 and 82 is operated. Alternatively, a control circuit that directly operates the 5-port 2-position solenoid valve may be used.
The outer slider may have a cylindrical shape provided on the entire circumference of the cylinder tube.

[0040]

According to the present invention, there is provided a piston cylinder in which a piston is slidably loaded in a cylinder tube, a hollow cylindrical rod pipe fixed to the piston so as to project from one end of the cylinder tube, and A rotatable rod rotatably loaded in the rod pipe, a male magnetic screw formed of a spiral magnetized band formed on the outer periphery of the rotatable rod, and an end through hole of a cylinder tube through which the rod pipe penetrates. Since it has a female magnetic screw consisting of a spiral magnetized band formed on the peripheral surface, the piston slides inside the cylinder tube, enabling smooth spiral movement output via the rotating rod, and It has become possible to provide a spiral motion cylinder whose use is expanded.

On the other hand, according to the present invention, two positions are connected to each pressure chamber divided into two in the sliding direction by a piston in a cylinder tube, and switch the supply of the working fluid from the working fluid supply source to the one pressure chamber. By having a changeover valve and a changeover switch that detects the sliding position of the piston and controls switching of the two-position changeover valve, it is possible to output a smooth helical motion and expand the use of the device. It has become possible to provide a spiral motion output device capable of controlling a continuous spiral motion output of a spiral motion cylinder.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an operation state of a spiral motion cylinder according to a first embodiment of the present invention.

FIG. 2 is a cross-sectional view of the spiral motion cylinder according to the first embodiment of the present invention in another operation state.

FIG. 3 is a cross-sectional view showing one embodiment of the spiral movement cylinder according to the present invention, as viewed from a different direction from FIG. 1;

FIG. 4 is a front view of the spiral movement cylinder according to the embodiment.

FIG. 5 is an exploded perspective view showing a configuration of a male magnetic screw 26 and a female magnetic screw 27.

FIG. 6 is a cross-sectional view of a second embodiment of the spiral movement cylinder and a changeover switch in one operation state.

FIG. 7 is a cross-sectional view showing another embodiment of the spiral movement cylinder according to the second embodiment and the changeover switch.

FIG. 8 is a view showing a cross section taken along the line CC of the spiral motion cylinder of FIG. 6;

FIG. 9 is a perspective view showing an outer slider 71.

FIG. 10 is an external perspective view showing a three-port valve 81.

FIG. 11 is a pneumatic circuit diagram showing an embodiment of a spiral motion output device.

FIG. 12 is a sectional view showing an operation state of a conventional spiral motion cylinder.

FIG. 13 is a sectional view showing another operation state of the conventional spiral motion cylinder.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Spiral motion cylinder 2 Cylinder tube 3 Piston 21 Rod pipe 23 Rotating rod 24, 25 Bearing 26 Male magnetic screw 27 Female magnetic screw 17 Rotation stop rod 28 Male cylindrical magnet 29, 32 Magnetization zone 30 Female cylindrical magnet 31 Magnetic guide

Claims (6)

[Claims] 1. A piston cylinder having a piston slidably mounted in a cylinder tube, a hollow cylindrical rod pipe fixed to the piston so as to protrude from one end of the cylinder tube, and the rod pipe A rotatable rod rotatably mounted therein, a male magnetic screw formed of a spiral magnetized band formed on the outer periphery of the rotatable rod, and an inner periphery of an end portion through-hole of the cylinder tube through which the rod pipe passes. A female magnetic screw formed of a helical magnetized band formed on the surface, wherein the rotating rod performs a helical motion by sliding the piston in the cylinder tube. Cylinder. 2. The helical motion cylinder according to claim 1, further comprising a detent rod penetrating the piston in a sliding direction in the cylinder tube. 3. A working fluid supply source, which is connected to the helical motion cylinder according to claim 1 or 2 and each pressure chamber divided in a sliding direction by the piston in the cylinder tube. A spiral having: a two-position switching valve for switching the supply of fluid to the one pressure chamber; and a switching switch for detecting a sliding position of the piston and controlling switching of the valve of the two-position switching valve. Exercise output device. 4. The helical motion output device according to claim 3, wherein the two-position switching valve is a pilot-type four-port valve or a five-port valve.
A port valve, wherein the changeover switch has a three-port valve that detects a sliding position of the piston and switches a working fluid to a pilot port of the two-position changeover valve. Spiral motion output device. 5. The helical motion output device according to claim 4, wherein the changeover switch holds a magnet for a magnet fixed to an outer periphery of the piston, and is disposed on an outer peripheral portion of the cylinder tube so as to be movable in an axial direction. An outer slider provided, and a mechanical three-port valve or a three-port solenoid valve that performs valve switching in conjunction with contact with the outer slider that follows the sliding of the piston. Spiral motion output device. 6. The helical motion output device according to claim 5, further comprising a support rod penetrating the outer slider in a sliding direction of the piston.