JPH0648443Y2 - Sensing distance measuring device for magnetic non-contact switch - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of use) The present invention is a sensing distance measurement used for measuring a unique sensing distance when a magnetic non-contact type switch senses magnetism and turns on / off. It relates to the device.

(Prior Art) Since the non-contact type switch can be turned on and off without requiring physical contact action, not only the switch is not damaged by the contact action, but also the switch is activated even in the presence of inclusions. It has advantages such as being able to. Therefore, recently, it is widely used not only as a sensor but also as a switch for general products.

A magnetic type switch is often used as such a non-contact type switch. The magnetic non-contact type switch is a switch that turns on the switch when a magnetic substance approaches the sensing surface by sensing the magnetism with a Hall element or the like.

By the way, in such a magnetic non-contact type switch, each distance for sensing magnetism has its own range. Therefore, when using the magnetic non-contact type switch, it is necessary to measure the inherent sensing distance.

In such a case, conventionally, a magnetic material is brought close to the switch which is actually used, and the sensing distance when the switch is operated is measured by a scale or the like.

(Problems to be solved by the invention) However, in such a method, the measurement accuracy is inevitably low. There is also a problem that the measurement can be performed only at the place where the switch is attached. Therefore, the measurement takes time.

Moreover, since the magnetic non-contact type switch has a slightly different sensing distance when the magnetic body approaches and moves away, the sensing distance must be measured in both cases.

The present invention has been made in view of such circumstances, and an object thereof is a simple measurement capable of accurately measuring a sensing distance of a magnetic non-contact switch at any place. To get the equipment.

(Means for Solving the Problems) In order to achieve this object, the present invention provides a sensing distance that includes a magnetic body and can measure the distance between the magnetic body and the sensing surface of a magnetic non-contact switch. A sensing tool and a signal cable of a magnetic non-contact type switch are connected, and a power supply box capable of displaying the operating state of the switch constitutes a sensing distance measuring device.

The sensing distance measuring tool includes an outer cylinder having a contact surface against which the sensing surface of the magnetic non-contact type switch contacts, and a movable type supported by the outer cylinder and moved back and forth with respect to the sensing surface of the switch. And a magnetic body. A scale for displaying the moving distance of the magnetic body from the contact surface of the outer cylinder is provided between the outer cylinder and the magnetic body.

In addition, the power supply box is provided with a display lamp that blinks according to whether the magnetic non-contact type switch is turned on or off.

(Operation) When the sensing distance of the magnetic non-contact type switch is measured using the measuring device configured as described above, the signal cable of the switch is connected to the power supply box and the sensing surface of the switch is measured. Abut the contact surface of the outer tube of the tool. Then, in that state, the movable magnetic body is moved with respect to the sensing surface of the switch. Then, when the predetermined position is reached, the switch is turned on or off, and the display lamp of the power supply box is turned on or off. So, if you read the scale of the sensing distance measuring tool at that time,
The sensing distance peculiar to the switch can be known.

Embodiment An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows an embodiment of a magnetic non-contact switch sensing distance measuring device according to the present invention. FIG. 1 is an overall view thereof, FIG. 2 is a sectional view of a sensing distance measuring tool, and FIG. It is an electric circuit diagram of a power supply box.

As is apparent from FIG. 1, the magnetic non-contact type switch 1
The sensing distance measuring device for measuring the sensing distance is composed of a sensing distance measuring tool 2 and a power supply box 3. The switch 1 is a columnar one having a bulge in the middle, and one end surface thereof is a sensing surface 1a for sensing magnetism. A signal cable 5 having a connector 4 at one end is connected to the switch 1.

The sensing distance measuring tool 2 includes an outer cylinder 6 and a thimble 7 rotatably fitted to the outer periphery of the rear portion (right side in the figure) of the outer cylinder 6. A reference scale 8 is provided on the outer cylinder 6 at a position adjacent to the front end edge of the thimble 7. On the other hand, at the front end portion of the thimble 7, there are provided measurement graduations 9 engraved at equal intervals in the circumferential direction.

As shown in FIG. 2, a switch holding portion 10 into which the switch 1 is fitted is provided at the front end portion of the outer cylinder 6. The rear end surface of the holding portion 10 is a contact surface 11 with which the sensing surface 1a of the switch 1 abuts. Further, inside the outer cylinder 6, there is provided a columnar magnetic body 14 having a male screw portion 13 that is formed on the outer cylinder 6 and is screwed into the screw portion 12. The magnetic body 14 is integrally connected to the thimble 7 via a shaft 14b. Thus, by rotating the thimble 7, the magnetic body 14 rotates together with the thimble 7 and moves in the axial direction with respect to the outer cylinder 6. The front end surface 14a of the magnetic body 14 is a contact surface 11 of the outer cylinder 6.
It is adapted to come into contact with the sensing surface 1a of the switch 1 brought into contact with.

Then, the front end surface 14a of the magnetic body 14 is thus changed to the switch 1
When it abuts on the sensing surface 1a of, that is, the front end surface of the magnetic body 14.
When 14a and the contact surface 11 of the outer cylinder 6 are on the same surface, the first
As shown in the drawing, the zero point of the measuring scale 9 matches the reference scale 8. Further, the number on the measuring scale 9 is attached according to the rotation angle of the thimble 7 from that position and the pitch of the screw portions 12 and 13, and the number indicating the moving distance of the magnetic body 14 from that position is the reference scale. It is designed to match 8.

On the other hand, as shown in FIG. 1 (B), the power supply box 3 is provided with a connector 15 to which the connector 4 of the signal cable 5 of the switch 1 is connected, in the lower front portion. In addition, on the upper front of the power supply box 3, a power switch 16, a power supply display lamp 17, and a switch detection display lamp.
18 and are provided.

As shown in FIG. 3, a power source 19 is provided in the power source box 3. The power switch 16 has its power source 19
The power supply circuit 20 that connects the power supply indicator lamp 17 and the power supply indicator lamp 17 is turned on / off. The connector 15 of the power supply box 3 is connected to the power supply circuit 20 via the signal circuit 21. Further, the switch detection indicator lamp 18 has an amplifier 22
It is connected between the signal circuit 21 and the power supply 19 via.

Next, the operation of the sensing distance measuring device of the magnetic non-contact type switch configured as described above will be described.

The thimble 7 of the sensing distance measuring tool 2 is used to measure the sensing distance of the switch 1 when the magnetic material for operating the switch 1 moves away from the magnetic non-contact type switch 1.
Is adjusted so that the zero point of the measuring scale 9 matches the reference scale 8. Then, the connector 4 of the signal cable 5 of the switch 1 is connected to the connector 15 of the power supply box 3, and the power switch 16 is pushed. Then, the power supply display lamp 17 and the switch detection display lamp 18 of the power supply box 3 are turned on, indicating that the preparation is completed.

Therefore, the switch 1 is fitted into the switch holding portion 10 of the outer cylinder 6 of the sensing distance measuring tool 2, and the sensing surface 1a of the switch 1 is brought into contact with the contact surface 11. At this time, the sensing surface 1a of the switch 1
Also contacts the front end surface 14a of the movable magnetic body 14. Therefore, the switch 1 is turned on by sensing the magnetism of the magnetic substance 14. This turns off the amplifier 22 and opens the circuit of the switch sense indicator lamp 18 to
Turns off.

In this state, the thimble 7 is rotated counterclockwise while pressing the outer cylinder 6. Then, the movable magnetic body 14 rotates together with the thimble 7 with respect to the outer cylinder 6, and is gradually retracted by the engagement of the screw portions 12 and 13. Therefore, the front end face 14 of the magnetic body 14 is
a goes away from the sensing surface 1a of the switch 1. When the distance between the switch 1 and the magnetic body 14 exceeds the sensing distance, the switch 1 is turned off, which turns on the amplifier 22. Therefore, the circuit of the switch detection indicator lamp 18 is closed, and the indicator lamp 18 lights up.
Then, the rotation of the thimble 7 is stopped at that position, and the numerical value of the measuring scale 9 that matches the reference scale 8 is read. Thereby, the sensing distance in this case can be known.

In addition, subsequently, when measuring the sensing distance of the switch 1 when the magnetic body for operating the switch 1 approaches the switch 1, the thimble 7 is rotated counterclockwise to retract the movable magnetic body 14 to the maximum extent. I will let you. Similarly, the switch 1 is fitted to the outer cylinder 6, and the sensing surface 1a is fitted to the outer cylinder 6.
It is brought into contact with the contact surface 11 of. At that time, the switch detection indicator lamp 18 is lit.

Therefore, the thimble 7 is rotated clockwise to bring the movable magnetic body 14 closer to the sensing surface 1a of the switch 1. Front end face of magnetic body 14
When 14a reaches the sensing distance of the switch 1, the switch 1 senses the magnetism and turns on, and the switch sensing display lamp 18 is turned off. Therefore, by reading the numerical value of the measuring scale 9 corresponding to the reference scale 8 at that position, the sensing distance of the switch 1 in this case can be known.

As described above, according to this sensing distance measuring device, the sensing distance of the magnetic non-contact type switch 1 can be measured only by using the small sensing distance measuring tool 2 and the power supply box 3, so where is the measurement performed? However, it is also possible to collectively measure the sensing distances of a large number of switches 1. Further, since it is only necessary to rotate the thimble 7 while watching the blinking of the switch detection display lamp 18, the operation is easy. Since the magnetic body 14 is moved by screwing the screw portions 12 and 13, fine adjustment of its position is facilitated and accurate sensing distance can be measured.

In the above embodiment, the reference scale 8 of the sensing distance measuring tool 2 is provided on the outer cylinder 6 side and the measurement scale 9 is provided on the thimble 7 side, but this can be reversed.

Further, although the sensing distance measuring tool 2 and the power supply box 3 are completely independent from each other, they may be integrally assembled.

Further, although the movable magnetic body 14 is supposed to be moved back and forth by rotation, it may be directly slid in the front-rear direction with respect to the outer cylinder 6.

(Effects of the Invention) As is apparent from the above description, according to the present invention, the sensing distance measuring device of the magnetic non-contact type switch is configured by the sensing distance measuring tool and the power supply box, so that it is portable. It is easy to use, and it is possible to provide a measuring device that is not restricted by the measuring place. In addition, a movable magnetic body is incorporated into the sensing distance measuring tool so that the distance between the magnetic body and the switch can be measured while the switch is in contact with it, so a highly accurate measurement value can be obtained. Can be obtained. Further, the power supply box is provided with a display lamp that blinks according to the operation of the switch, so that the operating state of the switch can be known just by looking at the display lamp, and a sensing distance measuring device that is easy to operate. can do.

[Brief description of drawings]

FIG. 1 is an overall view showing an embodiment of a sensing distance measuring device for a magnetic non-contact type switch according to the present invention, (A) is a side view of the switch and the sensing distance measuring tool, and (B) is a power supply box. 2 is a longitudinal side view of the sensing distance measuring tool, and FIG. 3 is an electric circuit diagram of the power supply box. 1 ... Magnetic non-contact type switch 1a ... Sensing surface 2 ... Sensing distance measuring tool, 3 ... Power supply box 5 ... Signal cable, 6 ... Outer cylinder 7 ... Thimble, 8 ... Standard scale 9 ... Measuring scale, 11 ... Contact surface 14 ... Mobile magnetic material, 15 ... Connection connector 18 ... Switch detection indicator lamp 19 ... Power supply

Claims (1)

[Scope of utility model registration request] 1. An outer cylinder having a contact surface against which a sensing surface of a magnetic non-contact type switch contacts, and a sensing surface of the switch supported by the outer cylinder and contacting against the contact surface. A movable magnetic body that is moved back and forth, and a sensing distance measuring tool that includes a scale that is provided between the outer cylinder and the magnetic body and that displays a moving distance of the magnetic body from the contact surface; A magnetic contactless switch sensing distance measuring device consisting of a power supply box with a signal cable connected to it, and a power supply box with an indicator lamp that blinks in response to an on / off signal from the switch.