JP2001065509A - Slide table reciprocating device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To downsize a slide table driven in a desired reciprocating stroke by magnetically coupling a piston built in a tube with the slide table. SOLUTION: A slide table 26 for supporting objects to be conveyed such as work-pieces and tools is mounted on a rail member 11 with U-shaped cross section for free reciprocation in a linear direction. Between end plates 13 at both ends of the rail member 11, a tube 16 is provided which is equipped with a piston therein for free reciprocation. A piston is driven by providing fluid to a fluid chamber in the tube 16. The piston has a permanent magnet 19 for driving, and is magnetically coupled with a driven member 33 so as to transmit the piston's movement to the slide table 26 via magnetic force.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reciprocating slide table in which a slide table is reciprocated in a linear direction by a fluid pressure, and a conveyed object such as a work or a jig disposed on the slide table is moved. Related to the device.

[0002]

2. Description of the Related Art A slide table reciprocating device for reciprocating a slide table in a linear direction by using compressed air as a drive medium and for moving a conveyed object such as a work or a jig disposed on the slide table. Is used.

As such a reciprocating device, a slide table, also called a work table, is reciprocally mounted along a guide rail provided on a cylinder block having a cylinder chamber, and a piston reciprocates in the cylinder chamber. There is a type in which a driven piston rod is connected to a slide table so as to reciprocate the slide table by air pressure, and this type of reciprocating device is known as a rod slider.

When the slide table is driven by the piston rod as described above, the slide table protrudes from the end face of the cylinder block. Must also be made large, and the whole device becomes large.

[0005]

In order to make the slide table reciprocate linearly within the entire length of the guide rail supporting the slide table, a slit type rodless cylinder is mounted on the apparatus body having the guide rail. A slide table reciprocating device of the type described above has been developed. In this type of device, the slide table does not protrude outward from the end of the guide rail,
Although the size of the slide table can be reduced, the structure of the slit type rodless cylinder becomes complicated, and the manufacturing cost increases.

It is an object of the present invention to reduce the size of a slide table driven within a desired reciprocating stroke range by magnetically coupling a piston incorporated in a tube and a slide table. .

[0007]

SUMMARY OF THE INVENTION A slide table reciprocating device of the present invention has a bottom wall and side walls provided on both sides of the bottom wall. A slide table mounted reciprocally in a linear direction along a tube, a tube mounted on end plates at both ends of the rail member, a piston mounted reciprocally in the tube, and an outer side of the tube And a driven member attached to the slide table and magnetically coupled to the piston, and communicates with a fluid chamber formed on both sides of the piston in the tube. And a supply / discharge port formed so as to magnetically couple the piston and the slide table to move the piston. Characterized by being adapted to transmit.

In the slide table reciprocating device according to the present invention, the slide table can be reciprocated to the rail member via a guide member having a ball contacting a guide groove formed in the side wall of the rail member. I am trying to attach it. Further, in the slide table reciprocating device of the present invention, the guide center of the slide table and the drive center of the piston are made to substantially coincide with the center in the width direction of the rail member.

[0009]

Embodiments of the present invention will be described below in detail with reference to the drawings.

FIG. 1 is a partially omitted perspective view showing a slide table reciprocating device according to an embodiment of the present invention, FIG. 2 is a front view of FIG. 1, and FIG. FIG. 4 is a cross-sectional view taken along a line BB in FIG. 3.

As shown in FIG. 3, the reciprocating device comprises a bottom wall 11a and side walls 11b, 11b provided on both sides thereof.
c, a track rail having a U-shaped cross section, that is, a rail member 11 is provided, and the rail member 11 constitutes an apparatus main body. End plates 12 and 13 are respectively attached to both ends of the rail member 11 with a plurality of fixing screws 14, and a circular tube 16 is attached between both end plates 12 and 13.

As shown in FIG. 4, a reinforcing core 17 is fitted into one end of the tube 16, and the ends of the tube 16 and the core 17 are formed in recesses formed in the end plate 12. Is fitted. Similarly, another similar metal core is fitted in the end of the tube 16 and the tube 1
The end of the metal core 6 is fitted into a recess formed in the end plate 13.

A piston 18 is reciprocally mounted in the tube 16, and a permanent magnet 19 is provided on the piston 18, as shown in FIGS. Piston 18
Has two piston elements 18a and 18b each provided with a wear ring and a seal member, a plurality of ring-shaped permanent magnets 19 provided between them, and a plurality of plates 21 made of a magnetic material. Is the connecting rod 22
The connecting rod 22 has external thread portions at both ends.

In the tube 16, pneumatic chambers 23a and 23b are formed on both sides of the piston 18, respectively. A supply / discharge port 24a is formed in the end plate 12 in communication with the pneumatic chamber 23a to supply compressed air to the one pneumatic chamber 23a from the outside and to discharge the internal air. A supply / discharge port 24b is formed in the end plate 13 so as to communicate with the pneumatic chamber 23b in order to supply compressed air from and to discharge the internal air.

A guide groove 11d having a semicircular cross section is formed on the inner surface of the side wall portions 11b and 11c of the rail member 11.
11c is formed from one end to the other end. As shown in FIG. 3, a guide member 25 is mounted on the rail member 11 so as to be able to reciprocate linearly.
5 are circulated in the guide groove 1
1d.

The guide member 25 has a slide table 26
The slide table 26 is supported by the rail member 11 via the guide member 25 so as to be reciprocally movable. The slide table 26 has a thin central portion 26a.
And a thick supporting portion 26 integrally formed at both ends in the width direction.
b. As shown in FIGS. 1 and 3, the central portion 26 a is covered with a cover 31 screwed to the end plates 12 and 13, and the support portions 26 b project from both sides from the side surface of the cover 31, and extend from the cover 31. Also project upward. A support member (not shown) is attached to the slide table 26 by a screw member coupled to a screw hole 32 formed in the support portion 26b, and a work, a jig, a tool, or the like is arranged on the support member and transported by the slide table 26. Can be.

A driven member 33 made of a permanent magnet is mounted on the slide table 26. The driven member 33 is magnetically coupled to the drive-side permanent magnet 19 and moves following the movement of the piston 18. A plurality of driven members 33 are provided in a ring shape having a thickness corresponding to the permanent magnets 19 on the driving side, and a ring 34 made of a magnetic material is sandwiched between the driven members 33. However, piston 1
8 and the driven member 33 are magnetically coupled to each other,
Instead of using a permanent magnet as the driven member 33, a magnetic material may be used, or a magnetic material may be incorporated into the piston 18 using the driven member 33 as a permanent magnet.

Therefore, when air pressure is supplied from one supply / discharge port 24a into the air pressure chamber 23a, the piston 18
Is driven from left to right in FIG.
The slide table 26 follows the piston 18 via the driven-side member 33 magnetically coupled to the piston 18. At this time, the air in the other air pressure chamber 23b is discharged to the outside from the supply / discharge port 24b. When the slide table 26 is driven in the reverse direction, compressed air is supplied from the supply / discharge port 24b, and air is discharged from the supply / discharge port 24a.

As described above, since the slide table 26 is supported by the rail member 11 and reciprocates, the load applied to the slide table 26 is limited to the rail member 1.
1 is supported via the guide member 25. Thus, the tube 16 has only a function of guiding the piston 18 without applying a load acting on the slide table 26 to the tube 16.
6 can be made thinner, and the magnetic coupling force between the drive-side and driven-side permanent magnets 19, 38 can be increased.

As shown in FIG. 3, the position at which the ball circulating in the guide member 25 contacts the guide groove 11d is O1,
If O2 is set, the guide center O of these centers coincides with the center P of the piston 18 at the center position in the width direction of the apparatus, and the piston 18 is located between the slide table 26 and the guide member 25. From that
When driving the slide table 26 via the piston 18, the thrust is not deviated in the width direction of the slide table 26, and the slide table 26 can be driven in a well-balanced manner. Thereby, the slide table 26
Can be driven smoothly.

In order to detect that the slide table 26 has reached the predetermined reciprocating position, sensor plates 35 are screwed to the outer surfaces of both side walls 11b and 11c of the rail member 11, respectively. The sensor plate 35 is formed with two sensor grooves 36 each having a U-shaped cross section.

The slide table 26 is provided with two sensor brackets 37, and each sensor bracket 37 has a permanent magnet 38 incorporated therein. A magnetic sensor sensitive to the magnetic force of the permanent magnet 38 is assembled in each sensor groove 36, and the position of the slide table 26 is set at the maximum between the position of the reciprocating stroke end and the two intermediate positions. Four positions can be detected. However, only one sensor,
Alternatively, two or three sensors may be used.

Each of the end plates 12 and 13 has a stopper 41 for regulating the position of the slide table 26 when the slide table 26 moves to the end of the reciprocating stroke, and absorbs an impact when approaching the stroke end. And a shock absorber 42 for performing the operation.

FIG. 5 is a sectional view showing the same part as that of FIG. 3 in a slide table reciprocating device according to another embodiment of the present invention. In this case, the guide member 25 in which a ball that comes into contact with the guide groove 11 d is incorporated is provided with a driven member 33, and the drive center of the piston 18 and the guide center of the guide member 25 correspond to the width of the rail member 11. The direction and the vertical direction are almost the same.

FIG. 6 is a sectional view showing a slide table reciprocating device according to another embodiment of the present invention. In this case, a guide member 25a provided with a driven member 33 is provided.
And a guide member 25 reciprocating along the rail member 11
b and two guide members 25a
Are arranged to protrude above the rail member 11.

FIG. 7 is a sectional view showing a slide table reciprocating device according to another embodiment of the present invention. In this case, similarly to the case shown in FIG.
5a and 25b, and the slide table 26 is integrated with the guide member 25a.

FIG. 8 is a sectional view showing a slide table reciprocating device according to another embodiment of the present invention. In this case, a tube 16 is provided on the bottom side of the rail member 11 and the outside of the tube 16 is provided. The guide member 25 connected to the driven side member 33 provided on the rail member 11 is provided on the opening side of the rail member 11. A slide table 26 (not shown) is attached to the guide member 25 integrally or as a separate part.

In FIGS. 5 to 8, FIGS.
The sensor plate 35 and the sensor bracket 37 in the embodiment shown in (1) are omitted, and the same members are denoted by the same reference numerals.

The present invention is not limited to the above embodiment, and it goes without saying that various changes can be made without departing from the spirit of the present invention.

For example, in the illustrated slide table reciprocating apparatus, the slide table 26 is driven by air pressure, but may be operated by hydraulic pressure. Also, a rail member 11 having a U-shaped cross section
A rail may be provided on the bottom wall portion 11a, and a guide member may be mounted on the rail so as to be reciprocally movable, or two rails may be provided.

[0031]

According to the present invention, the piston provided in the tube so as to be reciprocally movable in the axial direction and the driven member outside the tube are magnetically coupled, and the driven member is attached to the slide table. Since the slide table is driven by the piston via the driven-side member, the slide table does not protrude outward from the end of the rail member, so that the size of the reciprocating device can be reduced. By mounting the slide table reciprocally on the rail member, the load applied to the slide table can be supported by the rail member, and the fluid pressure need only be thrust for driving the slide table via the piston. Can be made thinner. Since the center position of the drive by the piston and the center position of the guide of the slide table by the guide member can be matched, the reciprocating balance can be improved and the slide table can be smoothly reciprocated. Further, since the guide member is used directly as the base member, it is possible to improve the traveling accuracy when the slide table reciprocates.

[Brief description of the drawings]

FIG. 1 is a partially omitted perspective view showing a slide table reciprocating device according to an embodiment of the present invention.

FIG. 2 is a front view of FIG.

FIG. 3 is a sectional view taken along line AA in FIG. 2;

FIG. 4 is a sectional view taken along line BB in FIG. 3;

FIG. 5 is a sectional view showing a part similar to FIG. 3 in a slide table reciprocating device according to another embodiment of the present invention.

FIG. 6 is a sectional view showing a slide table reciprocating device according to another embodiment of the present invention.

FIG. 7 is a cross-sectional view showing a slide table reciprocating device according to another embodiment of the present invention.

FIG. 8 is a sectional view showing a slide table reciprocating device according to another embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Rail member 11a Bottom wall part 11b, 11c Side wall part 11d Guide groove 12, 13 End plate 16 Tube 18 Piston 19 Drive side permanent magnet 23a, 23b Pneumatic chamber 24a, 24b Supply / discharge port 25 Guide member 26 Slide table 31 Cover 33 Driven member 35 Sensor plate 36 Sensor groove 37 Sensor bracket 38 Permanent magnet

Claims (3)

[Claims] 1. A slide table having a bottom wall and side walls provided on both sides thereof, a rail member having a U-shaped cross section, and a slide table mounted reciprocally in a linear direction along the rail member. A tube attached to end plates at both ends of the rail member; a piston reciprocally mounted in the tube; and a piston reciprocally mounted along the tube outside the tube. A driven-side member attached to the slide table and magnetically coupled to the piston, and a supply / discharge port formed in communication with fluid chambers formed on both sides of the piston in the tube; A slide table, wherein a piston and the slide table are magnetically coupled to each other to transmit movement of the piston to the slide table. Reciprocating device. 2. The slide table reciprocating device according to claim 1, wherein the slide table reciprocates to the rail member via a guide member having a ball that contacts a guide groove formed in the side wall of the rail member. A slide table reciprocating device characterized by being movably mounted. 3. The reciprocating device according to claim 1, wherein a guide center of the slide table and a drive center of the piston substantially coincide with a center of the rail member in a width direction. Slide table reciprocating device.