JPH04110203U - rodless cylinder - Google Patents

Abstract

(57) [Summary] [Structure] The slider block 6 is connected to the piston 5 by a magnet with the outer tube 1 in between, so it moves in conjunction with the movement of the piston 5. This piston 5 moves in the space between the outer tube 1 and the inner tube 2 by air pressure supplied to the piping port 7 of the head cover 8. The stroke end can be detected at this time by installing a magnetic sensor 9 inside the inner tube 2 and detecting the magnetism of the magnet 4a attached to the piston 1. [Effect] Magnetic sensors can be easily installed.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

The present invention relates to a rodless cylinder.

0002

[Conventional technology]

As a conventional rodless cylinder, for example, the drive in the catalog of SMC Corporation CAT. There is a CY1 series listed in the 20E version.

0003 A conventional rodless cylinder has a cylinder made of stainless steel, as shown in Figure 2. Piping port 1 included in head cover 18 that maintains airtightness provided on both end surfaces of cylinder 13 When air pressure is supplied from 7, the piston 15 with the magnet 14a in the cylinder 13 slides. As a result, the magnet 14a and the magnet 14b are magnetically coupled. The rider block 16 was sliding around the cylinder 13.

0004

[Problem that the idea aims to solve]

The conventional rodless cylinder described above has a slider block on the outside of the cylinder 13. Since the piston 16 has a sliding structure, check the stroke end of the piston 15. It is said that it is difficult to attach a magnetic sensor to the outside of cylinder 13 for emitting There is a problem.

[0005]

[Means to solve the problem]

The rodless cylinder of this invention consists of outer tubes made of non-magnetic material that are arranged coaxially and have different diameters. and an inner pipe, and a cylinder disposed between the outer pipe and the inner pipe to supply air. a piston that slides under pressure and has a first magnet; and a piston that is magnetically coupled to the first magnet. a second magnet that slides in conjunction with the piston with the outer tube as an axis; An empty space is arranged on both end surfaces of the rider block, the outer tube and the inner tube to maintain airtightness. a head cover having a piping port for supplying air pressure and a hole communicating with the inner pipe; and a magnetic sensor disposed within the inner tube.

[0006]

【Example】

The present invention will be explained with reference to the drawings. Figure 1 is a sectional view of an embodiment of the present invention. It is. This example uses stainless steel outer tubes that are coaxially arranged and have the same length but different diameters. A cylinder 3 consisting of a cylinder 1 and an inner tube 2, and an empty cylinder arranged between the outer tube 1 and the inner tube 2 A piston 5 that slides due to atmospheric pressure and has a magnet 4a, and a magnet 4a that the piston 5 has It has a magnet 4b that magnetically couples with the outer tube 1 and slides in conjunction with the piston 5 with the outer tube 1 as an axis. Arranged to maintain airtightness on both end surfaces of the moving slider block 6 and the outer tube 1 and inner tube 2. a head cover having a piping port 7 for supplying air pressure and a hole communicating with the inner pipe 2; -8 and a magnetic sensor 9 disposed within the inner tube 2.

[0007] Next, the operation of this embodiment will be explained. The slider block 6 separates the outer tube 1. Since it is connected to the piston 5 by a magnet, it moves in conjunction with the movement of the piston 5. This piston 5 connects the space between the outer tube 1 and the inner tube 2 to the piping port 7 of the head cover 8. Moves by supplied air pressure. The stroke end detection at this time is A magnetic sensor 9 is installed inside the tube 2, and the magnet 4a attached to the piston 1 is This is possible by detecting magnetism.

[0008]

[Effect of the idea]

As explained above, the present invention allows the magnetic sensor to be installed inside the inner tube. This has the effect of making it easier to install the sensor.

[Brief explanation of drawings]

FIG. 1 is a sectional view of an embodiment of the present invention.

FIG. 2 is a sectional view of a conventional example.

[Explanation of symbols]

1 Outer tube 2 Inner tube 3 cylinder 4a, 4b magnet 5 Piston 6 Slider block 7 Piping port 8 Head cover 9 Magnetic sensor

Claims (1)

[Scope of utility model registration request] Claim 1: A cylinder consisting of an outer tube and an inner tube made of a non-magnetic material and having different diameters arranged coaxially, and a cylinder arranged between the outer tube and the inner tube and slidable by air pressure. a piston having a first magnet; a slider block having a second magnet magnetically coupled to the first magnet and sliding in conjunction with the piston with the outer tube as an axis; and the outer tube. and a head cover disposed on both end faces of the inner tube to maintain airtightness and having a piping port for supplying air pressure and a hole communicating with the inner tube, and a magnetic sensor disposed in the inner tube. A rodless cylinder characterized by: