JPH0743459Y2 - Cylinder - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a cylinder, and more particularly to a cylinder provided with a sensor for detecting the position of a piston.

[Prior Art] Conventionally, as a cylinder of this type, a mounting groove extending along the moving direction of the piston is formed on the outer surface of the housing, and a small sensor for detecting the position of the piston is mounted in the mounting groove. There is known a structure in which a position detection signal is output from a sensor when the piston is moved to a position such as a moving end.

[Problems to be solved by the invention] However, in this conventional cylinder, a lead wire is extended from the outer surface of the sensor, and electric power is supplied to the sensor through the lead wire or a detection signal is taken out from the sensor. Therefore, when replacing or repairing the sensor at the time of failure etc., it is necessary to perform rewiring with fine work on the tip side of the lead wire, which is very difficult to replace. It is cumbersome and the lead wire is directly extended from the outer surface of the small sensor, so the lead wire to be used is limited to a thin one, especially when the cylinder is mounted on the movable part of various devices and used. However, there is a problem that the lead wire is likely to be broken.

The present invention was made by paying attention to the problems existing in such conventional technology, and the purpose thereof is to re-wire the lead wires for the sensor when the sensor fails. It is an object of the present invention to provide a cylinder that does not need to be replaced and can easily replace the sensor in a short time.

[Means for Solving the Problems] In order to achieve the above object, in the present invention, a pair of electrodes are provided on the inner surface of the mounting groove over substantially the entire length in the longitudinal direction, and the mounting groove is formed on the outer surface of the sensor. A pair of electrodes respectively corresponding to the respective electrodes and contactable with the electrodes are provided, and the pair of electrodes are arranged with the sensor main body sandwiched therebetween.

[Operation] In the cylinder configured as described above, when the sensor is mounted in the mounting groove on the outer surface of the housing, the electrode on the outer surface of the sensor comes into contact with the electrode on the inner surface of the mounting groove, and the sensor is connected to the housing via both electrodes. Is connected to a lead wire extending to the outer surface of the. Therefore, when the sensor is replaced at the time of failure or the like, there is no need to re-wire the tip end side of the lead wire, and the sensor replacement work can be easily performed in a short time.

Further, since the pair of electrodes provided in the mounting groove and the pair of electrodes provided in the sensor are arranged so as to sandwich the sensor main body, there is no possibility of short-circuit failure between the electrodes.

[Embodiment] An embodiment of a cylinder embodying the present invention will be described below in detail with reference to the drawings.

As shown in FIG. 2, the housing 1 is formed in a block shape, a piston (not shown) is movably provided in a cylinder chamber inside thereof, and a piston rod 2 is projected at one end surface thereof. A pair of air supply ports 3 and 4 are formed on the outer surface of one side of the housing 1, and the air pressure is supplied to the cylinder chamber from one of the air supply ports 3 and 4, so that the piston moves to the right in FIG. To the left or to the left.

As shown in FIGS. 1 and 2, each of the two mounting grooves 5 and 6 is formed on the three outer surfaces of the housing 1 over the entire length thereof, and extends in parallel with the moving direction of the piston. There is. The pair of protrusions 7 are formed on the inner edges of the openings of the mounting grooves 5 and 6, and are arranged to face each other. Two sensors 8,9
Is mounted on the outer surface of the housing 1 so as to be movable and adjustable in mounting grooves 5 and 6 on the outer surface of the housing 1. Detection element is provided. The tightening screw 10 is screwed into each of the sensors 8 and 9, and when the tightening screw 10 is tightened, the upper surface shoulder portion 11 of the sensor 8 and 9 is attached to the mounting grooves 5 and 6.
The sensors 5 and 6 are fixed to the required positions in the mounting grooves 5 and 6 by being pressed against the lower surface of the protrusion 7. Further, by loosening the tightening screw 10, the positions of the sensors 8 and 9 can be moved and adjusted.

The pair of electrodes 12 and 13 are provided on the inner surfaces on both sides of the mounting grooves 5 and 6, respectively, and extend over substantially the entire length of the mounting grooves 5 and 6 in the longitudinal direction. A pair of electrodes 14 and 15 are provided on both outer surfaces of each sensor 8 and 9, and when the sensors 8 and 9 are mounted in the mounting grooves 5 and 6, the electrodes 14 and 15 of the sensors 5 and 6 are mounted to the mounting groove 5 respectively. , 6 electrodes 12,
Contact 13. The lead wire 16 extends from the outer surface on one side of the housing 1, and in the housing 1, the electrodes 1 of the mounting grooves 5 and 6 are provided.
It is connected to 2,13.

Next, the operation of the cylinder configured as described above will be described.

Now, when air pressure is supplied to the cylinder chamber of the housing 1 from one of the air supply ports 3, a piston (not shown) in the cylinder chamber is moved to the right in FIG. 2, and when the piston reaches the right end position, A position detection signal is output from one of the sensors 8. When air pressure is supplied from the other air supply port 4 into the cylinder chamber, the piston is moved leftward, and when the piston reaches the left end position, the other sensor 9 outputs a position detection signal. It

Further, when the sensors 8 and 9 are to be replaced at the time of failure, etc., the tightening screw 10 is loosened to move the sensors 8 and 9 along the mounting grooves 5 and 6 to one end side thereof, , 9
Can be removed from the mounting grooves 5 and 6. After that, insert new sensors 8 and 9 into the mounting grooves 5 and 6, and fix them in place with the tightening screws 10.
4,15 contact the electrodes 12,13 on the inner surface of the mounting grooves 5,6, and the sensor 8,
The detection element in 9 is connected to the housing 1 through both electrodes 12 to 15.
Is connected to a lead wire 16 extending to the outer surface of the. Therefore, when replacing the sensors 8 and 9, there is no need to rewiring the tip end side of the lead wire 16, and the replacement work of the sensors 8 and 9 can be easily performed in a short time.

Further, in the cylinder of this embodiment, the lead wire 16 is not directly extended from the outer surfaces of the small sensors 8 and 9, but is extended from the outer surface of the housing 1. Therefore, the lead wire 16 to be used is thin. Is not limited to lead wires
A thick one can be used as 16. Therefore, when this cylinder is used by being attached to the movable portion of various devices, it is possible to reliably prevent the lead wire 16 from being broken due to the operation of the movable portion.

The present invention is not limited to the configuration of the above-described embodiment, and for example, the mounting groove is provided only on one outer surface of the housing 1.
5, 6 or a pair of electrodes 12, 13 are provided on the bottoms of the mounting grooves 5, 6, and electrodes 1 and 2 corresponding to the electrodes 12, 13 are provided on the bottoms of the sensors 8, 9.
It is also possible to embody by arbitrarily changing the configuration of each part, such as by providing 4,15, etc., without departing from the spirit of the present invention.

[Effect of the Invention] Since the present invention is configured as described above,
In the event of a sensor failure, there is no need to re-wire the sensor lead wires, sensor replacement work can be performed easily in a short time, and the electrodes are placed with the sensor body sandwiched between them. Therefore, there is an excellent effect that it is possible to prevent the occurrence of a short circuit failure between the electrodes.

[Brief description of drawings]

FIG. 1 is a partial sectional view showing a mounting structure of a sensor in a cylinder embodying the present invention, and FIG. 2 is a perspective view showing the entire cylinder. 1 ... Housing, 5,6 ... Mounting groove, 8,9 ... Sensor, 12,13 ...
Mounting groove side electrodes, 14,15 ... Sensor side electrodes, 16 ... Lead wires.

Claims (1)

[Scope of utility model registration request] 1. A sensor for detecting the position of a piston in the mounting groove (5, 6), the mounting groove (5, 6) extending along the moving direction of the piston is formed on the outer surface of the housing (1). In a cylinder having (8,9) attached, a pair of electrodes (12,13) are provided on the inner surface of the attachment groove (5,6) over substantially the entire length in the piston moving direction, and a sensor (8,9) is provided. On the outer surface of the mounting groove (5,6) each electrode (1
2, 13) and a pair of electrodes (14, 15) that can contact the electrodes (12, 13), respectively, and the pair of electrodes (12, 13, 14, 15) are connected to the sensor (8 , 9) A cylinder characterized by being placed with the body sandwiched.