JPH0529362Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial field of application The invention consists of a piston that is slidably fitted into a cylindrical cylinder tube having a slit, and a piston yoke provided on the piston that protrudes to the outside through the slit. This invention relates to an accessory mounting device for mounting accessory equipment such as a piston position detection switch to the cylinder tube of a slit-type rodless cylinder having a piston mount attached to the protrusion of the piston yoke.

Conventional technology Conventionally, as a device for attaching this type of accessory equipment (for example, a reed switch that detects a detecting object such as a permanent magnet attached to a piston in a cylinder and confirms the piston position) to a cylinder tube,
As shown in Utility Model Application Publication No. 57-24305,
A long guide rail is attached to the outer circumferential surface of the cylinder tube, the guide rail is screwed to the cylinder cover or cylinder tube, and accessory equipment is attached to a mounting bracket that is slidably provided on the guide rail. Jitsukai Showa 56-
As disclosed in Publication No. 70205, both ends of a thin steel strip curved so as to surround the outer peripheral surface of a cylindrical cylinder tube are connected to both ends of a U-shaped metal fitting to form an annular shape, and a ring is formed inside the U-shaped metal fitting. It is known that the fitted switch is brought into contact with the outer peripheral surface of the cylinder tube, and the switch is pressed against the cylinder tube by a screw in the center of the U-shaped fitting.

Problems to be Solved by the Invention According to the above-mentioned prior art, a long guide rail corresponding to the length of the cylinder tube is required, and a screw hole needs to be formed in the cylinder cover or the cylinder tube, so the manufacturing cost is low. In addition, in the case of screw holes drilled in the cylinder tube, there is a problem that the strength of the cylinder tube against internal pressure is reduced due to the pressure fluid, resulting in a shortened lifespan, especially in the case of slit type rodless cylinders. This was a big problem because the cylinder tube was easily deformed. According to the prior art, both ends of the steel strip are connected to U-shaped fittings to form an annular shape, so the annular steel strip must be fitted into the cylinder tube from the axial direction, which prevents the cylinder from being incorporated into other equipment. If the cylinder is attached to a cylinder tube, it is troublesome to have to remove the entire cylinder, and since a ring-shaped steel strip is fitted to the cylinder tube, there is a problem that it cannot be used in a slit-type rodless cylinder. .

Therefore, the applicant of this application proposed that
As disclosed in Publication No. 200908, a pair of deep diagonal grooves are formed on the outer peripheral surface of a rectangular cylinder tube, and a pair of mounting pieces attached to an accessory device are locked in the pair of diagonal grooves. Things, Mikiakiaki
As disclosed in Japanese Patent No. 61-206104, a device has been devised in which a fixture is screwed directly onto the outer peripheral surface of the cylinder tube, and accessory equipment is attached to the fixture.

However, according to the prior art, a pair of deep diagonal grooves are provided on the outer peripheral surface of the cylinder tube, which reduces the strength of the cylinder tube against internal pressure and shortens its life. Although it can be used in cylinder tubes with a rectangular cross section, it cannot be used in cylindrical cylinder tubes due to its strength unless the wall pressure is increased, which leads to high costs and makes it difficult to put it into practical use. Also, according to the prior art, since a screw hole is drilled in the cylinder tube in the same way as the prior art,
There is a problem that the strength of the cylinder tube against internal pressure decreases, resulting in a shortened lifespan.Furthermore, since the screw holes are machined directly into the cylinder tube, it is necessary to change the position of the screw holes for each mounting position of the accessory equipment. There was a problem that required custom-made processing.

Means for Solving the Problems The present invention solves the problems of the prior art and provides an accessory mounting device that allows accessory equipment to be easily and inexpensively mounted on the cylindrical cylinder tube of a slit-type rodless cylinder. In this product, shallow V-shaped grooves are formed in a striped manner over the entire length in the longitudinal direction on the outer circumferential surface of the opposing parts on both sides of the cylinder tube with the slit in between. The cylinder tube is formed into a U-shape that sandwiches the cylinder tube from both sides, and a small protrusion that can be engaged with one V-shaped groove is provided on one of the inner surfaces of both ends of this attachment fixture, and a small protrusion that can be engaged with one of the V-shaped grooves is provided on the other inner surface of both ends. A mounting screw body having a pointed tip capable of biting into the other V-shaped groove is screwed into the protrusion so as to be movable near and far.

Effect According to the above configuration, the U-shaped accessory device fitting is fitted into the cylinder tube from the side opposite to the slit, and the protrusion on the inner surface of one end of the accessory device fitting is fitted into the V-shape on one side of the cylinder tube. At the same time, tighten the mounting screw body on the inner surface of the other end of the accessory equipment mount so that its pointed end engages with the V-shaped groove on the other side of the cylinder tube, and in this state, attach the accessory equipment. Move the mounting tool in the axial direction of the cylinder tube and position it at the specified position, then further tighten the mounting screw body at that position so that its pointed end bites into the V-shaped groove of the cylinder tube, and then attach the accessory equipment mounting tool. Fix it to the cylinder tube. In addition, when changing the position of the attachment for accessory equipment, loosen the mounting screw body to release the biting of the pointed end, and then place the attachment for accessory equipment in the specified position with the pointed end engaged in the V-shaped groove. Move to the desired position, and then tighten the mounting screw body again in that position to fix it.

Embodiment With reference to FIGS. 1 to 3, a case will be described in which a rodless cylinder is used. A cylindrical cylinder tube 1 made of a non-magnetic material has a cylinder chamber 2 having a circular cross section eccentrically from the center of its outer diameter.
End caps (not shown) each having a port for supplying and discharging pressurized fluid are fixed to both ends (not shown) of the cylinder tube 1. A piston 3 made of a non-magnetic material such as an aluminum alloy is slidably fitted into the cylinder chamber 2 . This piston 3 has a recess 4 in its center.
is formed, a piston yoke 5 is fixed to this recess 4 by a mounting screw 6, and a part of this piston yoke 5 protrudes to the outside through a slit 7 that is open over the entire length of the cylinder tube 1 in the longitudinal direction.
A piston mount 8 is fixed to this protrusion 9.

Inner and outer seal bands 10 and 11 fixed to left and right end caps (not shown) are provided on the inside and outside of the slit 7 to seal the slit 7. The piston 3 is further provided with alnico bar magnets 12, 12 on both sides of the center in the longitudinal direction.
are arranged in parallel so that their magnetic poles face the inner surface of the cylinder chamber 2, and the magnetic poles facing the inner surface of the cylinder chamber 2 in the same direction are arranged so that their polarities are reversed to generate a magnetic field. A shallow V-shaped groove 13 is formed on the outer circumferential surface of the radially opposing portion of the cylinder tube 1 that faces the locus of movement of the magnetic poles of the alnico bar magnets 12, 12, so as not to cause a decrease in strength of the cylinder tube 1 due to internal pressure caused by fluid pressure. , 13 are directly formed over the entire length of the cylinder tube 1 in the longitudinal direction. This V-shaped groove is used when the cylinder tube is made of extruded aluminum.
It can be provided by molding a cylinder tube.

14 is an accessory attachment fixture with a roughly U-shaped cross section,
A protrusion 16 that engages with the V-shaped groove 13 is formed on the inner surface of one of the opposing ends 15a, 15b over the entire width of the mounting fixture 14. Mounting screw bodies 17, 17 having pointed tips serving as pushing portions are screwed into the radially opposing portion 15b of the mounting fixture 14 that faces the protrusion 16.
The mounting fixture 14 is fixed to an L-shaped metal fitting 18 with screws 19, 19, and the alnico magnet 1 is attached to the L-shaped metal fitting 18.
A magnetically sensitive switch 20, such as a reed switch, which is actuated by the magnetic field generated by the magnetic field generated by the magnetic field generating means 2 and 12, is connected to a set screw 21.
It is fixed at .

Now, in order to fix such a U-shaped fixture 14 (on which attached equipment such as a magnetically sensitive switch is attached) to the cylinder tube 1, first loosen the sharp-pointed mounting screws 17 and remove the slit. 7 and is fitted into the cylinder tube 1 from the opposite side to the protrusion 16.
is engaged with one of the V-shaped grooves 13, and then the mounting screws 17, 17 are screwed in so that their pointed ends bite into the other V-shaped groove 13, and the cylinder tube 1 is sandwiched and fixed from the radial direction. Since the sharp end is bitten in this way, even if vibrations are applied to the cylinder, the fixture 14 will not move in the axial direction. In addition, when it is desired to change the position of an accessory device such as the magnetically sensitive switch 20, the mounting screws 17, 17 are slightly loosened to release the sharp points, and the pointed ends are engaged with the V-shaped grooves 13. In this state, slide the fixture 14 in the axial direction of the cylinder tube 1, position it at a predetermined position, and tighten the mounting screws 17, 17 at the predetermined position.Since the magnetically sensitive switch etc. are integrated with the fixture 14, installation is easy. Ingredients 1
During the movement of 4, the magnetically sensitive switch 20, etc.
4, the magnetically sensitive switch 20 and the like can be easily moved and fixed to any position.

Incidentally, the protruding portion of the attachment device may be formed by a sharp tip of a mounting screw attached to one end of the attachment device.

Effects of the invention As described above, in the present invention, the accessory device fitting is fitted into the cylinder tube from the side opposite to the slit, and the protrusion provided on the fitting is engaged with the V-shaped groove on one side of the cylinder tube. At the same time, the pointed end of the mounting screw screwed into the mounting tool is inserted into the V-shaped groove on the other side of the cylinder tube to fix it. Even when it is assembled into other equipment, the attachment of the accessory device can be easily attached to the cylinder tube from the radial direction, and the mounting position of the attachment of the accessory device can be easily changed by loosening or tightening the mounting screw. can be changed to
Also, the small protrusion of the mounting tool should be engaged with one side of the shallow V-shaped groove provided on the outer circumferential surface of the cylinder tube, and the pointy end of the mounting screw should be engaged with the other side of the shallow V-shaped groove so as to bite into it. As a result, the V-shaped groove provided in the cylinder tube can be made extremely small, and as a result, even with a slit-type cylindrical cylinder tube, the decrease in strength of the cylinder tube due to internal pressure can be minimized, and the life of the cylinder tube can be maintained. . Also, V provided in the cylinder tube
Even if the shaped groove can be made extremely small, when fixing the accessory equipment mounting tool, the point of the mounting screw screwed into the mounting tool must be connected to the V on the other side of the cylinder tube.
Since this is done by biting into the shaped groove, the accessory fixture can be reliably fixed to the cylinder tube, and displacement of the accessory fixture due to vibration or the like can be prevented.

[Brief explanation of drawings]

Figure 1 is a side view of the cylinder, Figure 2 is the Z of Figure 1.
-Z sectional view, and FIG. 3 is a XX sectional view of FIG. 1...Cylinder tube, 3...Piston, 5
...Piston yoke, 6...Piston mount,
7...Slit, 13...V-shaped groove, 14...Ancillary equipment mounting tool, 15a, 15b...Both ends, 16
...Protrusion, 17...Mounting screw body.

Claims (1)

[Scope of utility model registration request] A slit-type rodless cylinder in which a piston is slidably fitted into a cylindrical cylinder tube having a slit, a piston yoke provided on the piston projects outward through the slit, and a piston mount is attached to the piston yoke. In this method, shallow V-shaped grooves are formed in a striped manner over the entire length in the longitudinal direction on the outer circumferential surface of opposing parts on both sides of the cylinder tube with the above-mentioned slit in between, and accessory equipment mounting tools are attached to the cylinder tube on the side opposite to the above-mentioned slit. A small protrusion that can be engaged with one of the V-shaped grooves is provided on one of the inner surfaces of both ends of this attachment fixture, and a tip is provided on the other inner surface of both ends. An attachment device for a slit-type rodless cylinder, comprising a mounting screw having a pointed tip capable of biting into a V-shaped groove, and screwed onto the protrusion so as to be movable near and far.