JPH0139483B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to a technique that is effective when applied to pneumatic cylinders.

[Background Art] Conventionally, various types of pneumatic cylinders have been proposed. Among them, those having a square or rectangular cross section to prevent rotation of the cylinder are, for example, Japanese Patent Publication No. 58-31488 and Utility Model Publication No. 58
−28105.

However, among the above-mentioned conventional techniques, the former has only one through hole in the cylinder, and the air ports are located on the outer surfaces of both caps. The latter has air ports on the outside of both caps, and has a small round hole for air passages, making it impossible to attach sensors or speed controllers.

Therefore, in the conventional technology, piping and wiring get in the way, sensors and speed controllers have to be attached externally, which results in poor appearance, a complicated structure, inability to utilize space effectively, and inconvenience in handling. There are other problems.

[Object of the invention] The object of the present invention is to prevent piping and wiring from getting in the way.
The object of the present invention is to provide a cylinder that allows easy attachment of devices such as sensors and speed controllers, has a good appearance, and is convenient to handle.

[Structure of the invention]

The cylinder of the present invention has an integral cylinder body extruded from a metal material and having a polygonal cross-sectional shape, the interior of which is divided into at least three spaces in the axial direction, and among the three spaces, The first space is a space for fitting and inserting a piston, the second space is a space for supplying and discharging working fluid, and the third space is a space for mounting a position detection sensor, and the third space is a space for mounting a position detection sensor on the rod end side of the cylinder body. is at least the first and second
A space is sealed by a front end plate, a rear end plate is joined to the inside of the head end side of the cylinder body at least in the first and second spaces, and an outer end side of the rear end plate is sealed. Two speed controllers are built-in for adjusting the flow rate of working fluid supplied to each of the cylinder chambers on both sides of the piston, and fluid piping for supplying and distributing the working fluid to the cylinder chambers on both sides of the piston and the All the wiring to the position detection sensor in the space No. 3 is connected to the head end side of the cylinder body.

[Example] Fig. 1 is a side view of the rod end side of a cylinder which is an embodiment of the present invention, and Fig. 2 A and B are respectively a side view of the rod end side of a cylinder according to an embodiment of the present invention.
3 is a perspective view of the head side of the cylinder, FIG. 4 is a perspective view of the base material of the cylinder body, and FIG. 5 is a sectional view of the position detection sensor mounting part. 6 is a sectional view taken along the line -- in FIG. 5, FIG. 7 is a perspective view of the sensor mounting bar, and FIG. 8 is a partial perspective view showing the state in which the speed controller is attached.

The cylinder in this embodiment is a pneumatic cylinder, and the cylinder body 1 has a first shape.
As is clear from the figures, FIG. 3, etc., it has a rectangular cross-sectional shape.

That is, the cylinder body 1 is made of a core material such as a metal material extruded into a rectangular shape, and has an integral structure in which the interior is divided into three spaces A, B, and C in the axial direction.

A space A in the cylinder body 1 is a space for fitting a piston of a pneumatic cylinder, and a piston rod 2 is slidably fitted therein. The outer end of the piston rod 2 is formed as a threaded part 3 into which a mounting nut 4 is screwed. On the other hand, the inner end of the piston rod 2 inserted into the cylinder body 1 includes an E ring 5, a bumper 6, a piston 7, a piston packing 8 fitted in the circumferential groove of the piston 7, and a magnet for sensor operation. A packing 9, a bumper 10, and a stop plate 11 are provided in this order from the outer end side.

Further, a front end face plate 12 is fitted into the rod end of the cylinder body 1 (on the left side as seen in FIG. 2), and its outer periphery is hermetically joined to the inner wall of the cylinder body 1 except for the space C. There is. An oil-impregnated bush 1 is provided between the outer periphery of the piston rod 2 and the hole in the front end plate 12.
3 and a rod packing 14 are interposed.

Space B is used as an air passage for supplying and discharging air, which is a working fluid, and a notch 1 is provided at the end of the rod.
5 is formed, and this notch 15 connects space B and space A.
An air passage is configured to communicate the rod side of the rod (see FIGS. 2 and 4).

The head ends (right end in FIG. 2) of the spaces A and B, except for the space C, are sealed by joining the rear end face plate 16 to the inner wall of the cylinder body 1.
This rear end plate 16 has two speed controllers (speed control valves) 17 built into the head end of the cylinder body 1, as shown in FIGS. 2A and B.
A port 19 connected to the air supply/discharge port 18 is provided so as to communicate with the spaces A and B through a sleeve 20 and an O-ring 21, respectively. The speed controller 17 includes a spring 22 and a diaphragm 2.
3. It has an air flow adjustment needle 25 and an O-ring 26 that protrude below the cylinder body 1.
The speed controller 17 is used to adjust the speed of the forward and backward movement of the piston rod 2, and the air flow rate adjustment needle 25 adjusts the speed to a desired speed.
As shown in FIG. 8, the speed controller 17 is integrally melted and joined to the base material of the cylinder body at a joint 27.

In the space C, there are provided two H-shaped sensor holding bars 28 and a position detection sensor 29 attached to each of the bars 28 by adhesive or the like and opened and closed by the magnetic force of the magnetic packing 9. ing. The bar 28 and the sensor 29 are fixed in the space C by a sensor fixing screw 31 screwed into a screw hole 30 in the upper wall of the cylinder body 1. The bar 28 is made of a non-magnetic material, and a lead wire 33 of the sensor 29 is led out to the head side through the H-shaped groove 32 in the axial direction.

In this embodiment, the air supply/discharge port 18 into the cylinder is also provided on the head side of the cylinder body 1, similar to the lead wire 33 of the sensor 29. Therefore, as shown in FIGS. 3 and 8, an air supply/discharge mounting tube 34 which is an air piping is installed.
is connected to the air supply/discharge port 18. That is, in the case of this embodiment, the tube 34 as the air piping and the lead wire 33 as the wiring are connected to the same head side, making handling convenient and providing a clean and attractive appearance.

In addition, when it is desired to attach the cylinder of this embodiment to a desired location, it is fixed, for example, with bands 35 wrapped around both ends of the cylinder body 1, as shown in FIG.

Next, the operation of this embodiment will be explained.

When air pressure is supplied to the cylinder from an external control valve (not shown), the air pressure is transferred from the air supply/discharge mounting tube 34 to the air supply/discharge port 18 of the speed controller 17 on the head side of the cylinder body 1.
It is supplied to the rod side and the head side of the piston 7 through the passageway, and moves the piston rod 2 forward and backward. The forward and backward movement speeds of the piston rod 2 are controlled by the speed controller 17 by adjusting the two needles 25.
This is done by increasing or decreasing the air flow rate in the internal passages of the.

Further, the position of the piston 7 is detected by turning the position detection sensor 29 ON and OFF using the magnetic force of the magnetic packing 9 of the piston 7. Therefore, each of the two position detection sensors 29 is adjusted by the bar 28 to a desired detection position, that is, the forward position and the backward position of the piston rod 2, and is fixed by the sensor fixing screw 31.

Note that the present invention is not limited to the above-mentioned embodiments; for example, the cross-sectional shape of the cylinder body 1 can be made square in addition to rectangular.

〔Effect of the invention〕

(1) According to the present invention, the cylinder body is provided with an integral structure having a polygonal cross-sectional shape extruded from a metal material and whose interior is divided into at least three spaces in the axial direction; Among them, the first space is a space for fitting the piston, the second space is a space for supplying and discharging working fluid, and the third space is a space for mounting a position detection sensor. The rod end side is sealed with a front end plate in at least the first and second spaces, and a rear end plate is joined to the inside of the head end side of the cylinder body in at least the first and second spaces; On the outer end side of the rear end plate, there are two holes for adjusting the flow rate of the working fluid supplied to each of the cylinder chambers on both sides of the piston.
A speed controller is built-in, and fluid piping for supplying and distributing working fluid to the cylinder chambers on both sides of the piston and wiring to the position detection sensor in the third space are all connected to the head end of the cylinder body. By connecting the working fluid piping to the cylinder to the position detection sensor, the wiring to the position detection sensor does not interfere with piston rod operation or piping and wiring work, making handling extremely convenient. Moreover, the wiring work is easy, the structure is simple, the installation space for the cylinder is small, and the external appearance is improved.

(2) Since the speed controller is integrally melted and joined to the base material of the cylinder body at the joint, the speed controller is firmly and reliably fixed to the cylinder body, and the joint can be made with good appearance. .

(3) Two H-shaped sensor holding bars are inserted into the third space, each bar has one position detection sensor, and each mounting position is aligned in the direction of movement of the piston. Because they are mounted offset from each other by a predetermined distance, the position detection sensors and their wiring do not protrude to the outside in the circumferential direction of the cylinder, making it possible to reduce the circumferential dimension of the cylinder. Another advantage is that there are no restrictions on the mounting direction.

[Brief explanation of drawings]

FIG. 1 is a side view of the rod end side of a cylinder that is an embodiment of the present invention, and FIGS. 2A and 2B are cross-sectional views taken along lines A-A and B-B in FIG.
Fig. 3 is a perspective view of the head side of the cylinder, Fig. 4 is a perspective view showing the base material of the cylinder body, Fig. 5 is a partial side view of the position detection sensor mounting part, and Fig. 6 is a perspective view of the cylinder body.
FIG. 7 is a perspective view of the sensor mounting bar, and FIG. 8 is a partial perspective view showing the state in which the speed controller is attached. 1... Cylinder body, 2... Piston rod,
7...Piston, 9...Magnetic packing, 1
2... Front end plate, 15... Notch, 16... Rear end drawing plate, 17... Speed controller, 1
8... Air supply/exhaust port, 25... Needle for adjusting air flow rate, 27... Melting joint, 28... Bar for holding sensor, 29... Position detection sensor, 3
1...Sensor fixing screw, 33...Lead wire, 34
...Mounting tube for air supply and exhaust, A, B, C...Space in the axial direction of the cylinder body.

Claims (1)

[Scope of Claims] 1. A cylinder body having an integral structure extruded from a metal material and having a polygonal cross-sectional shape, the interior of which is divided into at least three spaces in the axial direction, and one of the three spaces. , the first space is a space for fitting the piston, the second space is a space for supplying and discharging working fluid, the third space is a space for mounting a position detection sensor, and the rod end of the cylinder body is The side is sealed with a front end plate in at least the first and second spaces, a rear end plate is joined to the interior of the head end side of the cylinder body in at least the first and second spaces, and the rear end plate is sealed at least in the first and second spaces. Two speed controllers are built into the outer end of the end plate for adjusting the flow rate of the working fluid supplied to each of the cylinder chambers on both sides of the piston. A cylinder characterized in that fluid piping for supply and distribution and wiring to the position detection sensor in the third space are all connected to the head end side of the cylinder body. 2. The cylinder according to claim 1, wherein the speed controller is integrally melted and joined to the base material of the cylinder body at a joint portion. 3 Two H-shaped sensor holding bars are inserted into the third space, each bar has one position detection sensor, and each mounting position is set in the direction of movement of the piston. 3. The cylinder according to claim 1, wherein the cylinders are mounted so as to be shifted from each other by a predetermined distance.