JPH04357310A - Magnet type cylinder device - Google Patents

Abstract

PURPOSE:To provide a magnet type cylinder device which utilizes curvilinear motion of a slider and is suitable for purposes. CONSTITUTION:There are provided a curvilinearly extending cylinder tube 1, and a piston 2 which is displaceably housed on the cylinder tube 1 and curvilinearly moved in the extending direction of the cylinder tube 1. A slider 3 which is magnetically connected to the piston 2 through the cylinder tube 1 is curvilinearly moved along an outer peripheral surface of the cylinder tube 1 together with the curvilinear motion of the piston.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic cylinder device, and more particularly to a technique that is effective when applied to a magnetic cylinder device such as a rodless cylinder device operated by compressed air.

0002

2. Description of the Related Art A magnetic cylinder device is used as a rodless cylinder device, that is, a linearly extending cylinder tube, a piston displaceably housed in the cylinder tube, and a cylinder tube connected to the piston. A structure is known that includes a slider that is magnetically coupled through the cylinder tube and linearly moved along the outer circumferential surface of the cylinder tube in conjunction with the displacement of the piston.

0003

[Problems to be Solved by the Invention] Incidentally, since the above-described magnetic cylinder device has a structure in which the cylinder tube extends linearly, the operation of the slider is also a linear motion, and therefore, Unless a specific conversion mechanism is used, curved motion such as rotation or rocking cannot be obtained, making it difficult to use the curved motion of the slider.

[0004] An object of the present invention is to provide a magnetic cylinder device suitable for applications that utilize the curved motion of a slider.

The above and other objects and novel features of the present invention will become apparent from the description of the present specification and the accompanying drawings.

[0006]

[Means for Solving the Problems] Among the inventions disclosed in this application, a brief overview of typical inventions will be as follows.
It is as follows.

That is, the structure of the magnetic cylinder device of the present invention includes a cylinder tube that extends in a curved shape, and a cylinder that is displaceably housed within the cylinder tube and moves in a curve along the extending direction of the cylinder tube. The structure includes a piston, and a slider that is magnetically coupled to the piston via the cylinder tube and moves in a curve along the outer circumferential surface of the cylinder tube as the piston moves in a curve. .

In this case, the cylinder tube may extend in a circular shape.

[0009] Furthermore, the cylinder tube may extend spirally.

Furthermore, the cylinder tube may be formed to be bendable.

[0011]

[Operation] According to the above-described magnetic cylinder device of the present invention, the slider magnetically coupled to the piston is moved in a curve along the outer circumferential surface of the cylinder tube extending in a curve along with the curved motion of the piston. For example, it can be effectively used in a wide range of applications as a rodless cylinder device suitable for applications that utilize the curved movement of a slider, such as in a curved conveyance line.

In this case, if the cylinder tube has a structure extending in a circular shape, it can be effectively used in a wide range of applications as a rodless cylinder device suitable for applications that utilize the circular curved motion of the slider.

[0013] Furthermore, if the cylinder tube has a spirally extending structure, it can be effectively used in a wide range of applications as a rodless cylinder device suitable for applications that utilize the spiral curved movement of the slider.

Furthermore, if the cylinder tube is formed to be bendable, by bending the cylinder tube into an arbitrary shape, it becomes possible to utilize the curved movement of the slider in an arbitrary curve.

[0015]

[Embodiment 1] Fig. 1 is a sectional view showing a magnetic cylinder device according to an embodiment of the present invention, Fig. 2 is a sectional view taken along line II-II in Fig. 1, and Fig. 3 is a cylinder tube of the magnetic cylinder device. FIG. 4 is a sectional view showing another modification of the cylinder tube of the magnetic cylinder device.

As shown in FIG. 1, the magnetic cylinder device of this embodiment is a double-acting cylinder device operated by compressed air, and has a cylinder tube 1 extending in a curved shape of a perfect circle. , a piston 2 displaceably housed in the cylinder tube 1 and moving in a curve along the extending direction of the cylinder tube 1; and a piston 2 magnetically coupled to the piston 2 via the cylinder tube 1;
The slider 3 is moved along the outer peripheral surface of the cylinder tube 1 in a curve along with the curve movement of the cylinder tube 1.

The cylinder tube 1 is made of a flexible non-magnetic material such as resin, and can be formed into various curved shapes such as a perfect circle shape or a spiral shape as described later, and the cross section of the cylinder tube 1 as described later. It is intended to facilitate flattening.

Both ends of the cylinder tube 1 are caulked and closed by a single end cap 5 via a sealing member 4 such as an O-ring, and the inside of the cylinder tube 1 is closed by a piston 2 into operating fluid chambers 1A and 1B. It's partitioned off.

The end cap 5 has supply/discharge ports 5A,
5B is opened, and these supply/discharge ports 5A, 5B are communicated with working fluid chambers 1A, 1B, respectively.

The end cap 5 also has a mounting hole 5.
A pair of holes C are penetrated and formed, and by passing a fastening means (not shown) such as a bolt through these mounting holes 5C and fastening it to a predetermined location, it is possible to mount the magnetic cylinder device at a predetermined location. ing.

[0021] On the outer peripheral surface of both end surfaces of the piston 2,
A piston seal member 6 is fitted.

Further, magnets 7A, 7B and yokes 8A, 8B are respectively disposed on the outer circumferential surface of the piston 2 and on the inner circumferential surface of the slider 3, for magnetically coupling the two via the cylinder tube 1. These magnets 7
A, 7B and yokes 8A, 8B have a perfect circular ring shape in radial cross section corresponding to the radial cross section of the cylinder tube 1 and piston 2.

FIGS. 3 and 4 show modifications of such cylinder tube 1 and piston 2.

As shown in FIGS. 3 and 4, the radial cross sections of the cylinder tube 1 and the piston 2 are formed into a flat shape such as an ellipse, an oblong, or a symmetrical gourd shape, thereby reducing the thickness of the cylinder device. In order to increase the pressure receiving area of the piston 2, the radial cross section of the magnets 7A, 7B and the yokes 8A, 8B should be made into an endless shape corresponding to the radial cross section of the cylinder tube 1 and piston 2. It is also possible to do so.

Further, one or both of the magnets 7A, 7B and the yokes 8A, 8B are formed of an elastic material containing magnetic powder such as a rubber magnet, an elastic material containing iron powder, etc., and this elastic structure allows the outer periphery of the piston 2 to be Elastic deformation of the surface side and the inner peripheral surface side of the slider 3 is possible.

Next, the operation of this embodiment will be explained.

For example, in the state shown in FIG. 1, when working fluid pressure such as compressed air is supplied from the supply/discharge port 5A to the working fluid chamber 1A, the piston 2 moves inside the cylinder tube 1 having a perfect circular shape. Along with the curved movement of the piston 2, the slider 3 moves in a curve along the cylinder tube 1 and is displaced toward the supply/discharge port 5B.

Next, when a working fluid such as compressed air is supplied from the supply/discharge port 5B to the working fluid chamber 1B, the piston 2, which had been displaced toward the supply/discharge port 5B, moves inside the cylinder tube 1 having a perfect circular shape. The slider 3 moves in a curve along the cylinder tube 1 and is displaced toward the supply/discharge port 5A side along with the curved motion of the piston 2. do.

The magnetic cylinder device of this embodiment is operated in this manner, and the slider 3, which moves in a curve, is used, for example, as a conveyance means in a perfectly circular conveyance line to perform a predetermined work.

Therefore, the magnetic cylinder device of this embodiment is suitable for applications that utilize the circular curved movement of the slider 3, such as for use as a conveyance means in a perfectly circular conveyance line. It can be effectively used in a wide range of applications as a rodless cylinder device.

[0031] Furthermore, the magnetic cylinder device of this embodiment has the following features:
Because it has a rodless structure, unlike rod-type cylinder devices, there is no risk of leakage of working fluid pressure in the cylinder tube 1 due to the rod, and because it has a magnetic rodless structure, the slider 3 It is possible to facilitate or ensure stopping at an intermediate position, and furthermore, when used as a turntable, a large torque can be obtained.

[0032]

Embodiment 2 FIG. 5 is a partially cutaway perspective view of a magnetic cylinder device according to another embodiment of the present invention.

In the magnetic cylinder device of the second embodiment, a cylinder tube 1 whose both ends are closed by end caps 5 extends in a spiral shape, and a slider 3 extends along the outer peripheral surface of the spiral cylinder tube 1. It has a structure that moves in a spiral curve.

The magnetic cylinder device of the second embodiment can be effectively used in a wide range of applications as a rodless cylinder device suitable for applications that utilize the spiral curved motion of the slider 3.

Note that in the magnetic cylinder device of the second embodiment, unlike the magnetic cylinder device of the first embodiment described above, the curvature at each part in the extending direction of the cylinder tube 1, that is, for example, in FIG. The curvature A and the curvature B are different.

Therefore, there is a possibility that the curved motion of the piston 2 and the slider 3 will be hindered due to the difference in their curvatures, but such a possibility is caused by elastic deformation of one or both of the yokes 8A, 8B or the magnets 7A, 7B. It will be resolved.

[0037]

Embodiment 3 FIG. 6 is a partially cutaway perspective view of a magnetic cylinder device according to still another embodiment of the present invention.

In the magnetic cylinder device of the second embodiment, a cylinder tube 1 whose both ends are closed by end caps 5 is formed to be bendable, and by bending this bendable cylinder tube 1 into an arbitrary shape, a slider can be formed. 3 moves in a curve along the outer peripheral surface of the cylinder tube 1 which is bent into an arbitrary shape.

Therefore, according to the magnetic cylinder device of the third embodiment, by bending the cylinder tube 1 into an arbitrary shape, it is possible to utilize the curved movement of the slider 3 in an arbitrary curve.

Note that the curvature and bending direction of each part in the extending direction of the cylinder tube 1 may differ due to bending the cylinder tube 1 into an arbitrary shape.
Piston 2 due to these differences in curvature and bending direction
The curvilinear movement of the slider 3 is hindered by the yokes 8A, 8B or the magnet 7, as in the second embodiment.
It is canceled by elastic deformation of one or both of A and 7B.

[0041] Above, the invention made by the present inventor has been specifically explained based on examples, but the present invention is not limited to the above-mentioned examples, and can be modified in various ways without departing from the gist thereof. Needless to say.

For example, although the cylinder tube 1 in the above embodiment is made of a flexible non-magnetic material, it can also be made of a rigid non-magnetic material such as stainless steel in the present invention.

[0043]

[Effects of the Invention] Among the inventions disclosed in this application, the effects obtained by the typical inventions will be briefly explained as follows.
It is as follows.

(1) Since the slider magnetically coupled to the piston is moved in a curve along the outer peripheral surface of the cylinder tube extending in a curve along with the curve movement of the piston, it can be used, for example, in a curved conveyance line. It can be effectively used in a wide range of applications as a rodless cylinder device suitable for applications that utilize the curved motion of a slider.

(2) In the above case, if the cylinder tube has a structure extending in a circular shape, it can be effectively used in a wide range of applications as a rodless cylinder device suitable for applications that utilize the circular curved motion of the slider. be able to.

(3) In the above case, if the cylinder tube has a structure extending in a spiral shape, it can be effectively used in a wide range of applications as a rodless cylinder device suitable for applications that utilize the spiral curved motion of the slider. be able to.

(4) In the above case, if the cylinder tube is formed to be bendable, the cylinder tube can be bent into an arbitrary shape to utilize the curved movement of the slider in an arbitrary curve. becomes possible.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing a magnetic cylinder device that is an embodiment of the present invention.

FIG. 2 is a sectional view taken along line II-II in FIG. 1;

FIG. 3 is a sectional view showing a modification of the cylinder tube of the magnetic cylinder device.

FIG. 4 is a sectional view showing another modification of the cylinder tube of the magnetic cylinder device.

FIG. 5 is a partially cutaway perspective view of a magnetic cylinder device according to another embodiment of the present invention.

FIG. 6 is a partially cutaway perspective view of a magnetic cylinder device according to still another embodiment of the present invention.

[Explanation of symbols]

1 Cylinder tube 1A　Operating fluid chamber 1B Operating fluid chamber 2 Piston 3 Slider 4 Seal member 5 End cap 5A supply/discharge port 5B Supply/discharge port 5C Mounting hole 6 Piston seal member 7A Magnet 7B Magnet 8A York 8B York A Curvature B Curvature

Claims (4)

[Claims] 1. A cylinder tube that extends in a curved shape, a piston that is displaceably housed within the cylinder tube and moves in a curve along the extending direction of the cylinder tube, and a piston that is connected to the piston through the cylinder tube. 1. A magnetic cylinder device comprising: a slider that is magnetically coupled to the slider and is moved along the outer peripheral surface of the cylinder tube in a curved manner along with the curved motion of the piston. 2. The magnetic cylinder device according to claim 1, wherein the cylinder tube extends in a circular shape. 3. The magnetic cylinder device according to claim 1, wherein the cylinder tube extends spirally. 4. The magnetic cylinder device according to claim 1, wherein the cylinder tube is formed to be bendable.