JPH10246732A - Rotation detector for rotary member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate a delicate sensitivity regulation of a sensor by detecting a rotating state of a rotary member or a rotary shaft with a working tool, and preventing erroneous detection and occurrence of erroneous operation due to adherence of working chips, lubricating oil, dust, or refuse. SOLUTION: The rotation detector comprises a disc flange 40 as a detecting plate in which a circumferential recess 42 as a detecting part 41 formed integrally with a rotary shaft 2 arranged at its end with a drill 1 as a working tool and extended circumferentially is performed, and a proximity switch 6 disposed oppositely to the recess 42 to detect approach of the recess 42 without contact.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a detection plate formed integrally with a rotating rotating member and having a hole or recess extending in a circumferential direction, and a hole or the like of the detection plate. And a proximity switch for detecting rotation of the detection plate by detecting proximity of the hole or the like in a non-contact manner.

[0002]

2. Description of the Related Art Conventionally, a rotary member or a rotary shaft provided with a processing tool has been used without detecting the rotation state of the rotary member or the rotary shaft.

[0003]

A rotating member or a rotating shaft provided with the above-mentioned conventional machining tool is used without detecting the rotating state of the rotating member or the rotating shaft. There is a case where the motor is used in an abnormal rotation state such as a case where the rotation speed is lower than or higher than the allowable rotation speed, and there is a problem that a trouble due to the rotation abnormality may occur.

Therefore, the present inventors have proposed a detection plate which is formed integrally with a rotating member and has a detection portion extending in a circumferential direction, which is provided to face the detection portion of the detection plate. Focusing on the first technical idea of the present invention of detecting rotation of the rotating member by detecting the detecting portion in a non-contact manner, a hole integrally formed with the rotating member and extending in the circumferential direction is provided. The proximity switch disposed opposite to the hole or the concave portion of the detection plate in which the portion or the concave portion is perforated detects the approach of the hole or the concave portion of the detection plate in a non-contact manner, and thereby the rotation is performed. Focusing on the second technical concept of the present invention of detecting rotation of a member, and further research and development, as a result, it has become possible to detect the rotation state of a rotating member or a rotating shaft equipped with a processing tool, False inspection due to adhesion of lubricating oil, dust or dust And thereby prevent the occurrence of malfunction, we have reached the present invention to achieve the object of the need for delicate sensitivity adjustment of the sensors.

[0005]

According to a first aspect of the present invention, a rotation detecting device for a rotating member is formed integrally with a rotating rotating member and extends in a circumferential direction. The detection plate includes a detection plate provided with a detection portion, and a detection sensor that is disposed to face the detection portion of the detection plate and detects the detection portion in a non-contact manner.

The present invention (the second invention described in claim 2)
The rotation detecting device for a rotating member according to the second aspect,
The detection unit is configured by a hole or a recess extending in the circumferential direction in the detection plate, and the detection sensor is disposed to face the hole or the recess of the detection plate, and the hole or the recess is provided. The proximity switch detects the approach of the concave portion in a non-contact manner and detects the rotation of the detection plate.

The present invention (third invention according to claim 3)
The rotation detecting device for a rotating member according to the second aspect,
The detection plate is constituted by a circular plate formed coaxially with a rotation axis as the rotation member, and has a circumferential slot formed in a circumferential direction.

The present invention (the fourth invention described in claim 4)
The rotation detecting device for a rotating member according to the third aspect,
The proximity switch is provided on a bearing member that supports the rotation shaft.

The present invention (fifth invention described in claim 5)
The rotation detecting device for a rotating member according to the fourth aspect,
The proximity switch detects an approach of the circumferential slot formed in the circular plate made of metal as a change in capacitance of an electrode by a change in oscillation frequency in a capacitance type proximity switch or a high-frequency oscillation circuit. This is constituted by a high-frequency oscillation type proximity switch for detection.

The present invention (the sixth invention described in claim 6)
The rotation detecting device for a rotating member according to the fifth aspect,
A rotation speed display means for displaying a rotation speed of the rotation shaft based on a rotation signal of the rotation shaft detected by the proximity switch.

The present invention (the seventh invention described in claim 7)
According to the sixth aspect of the present invention,
An abnormality display means for displaying an abnormality in rotation of the rotary shaft based on a rotation signal of the rotary shaft detected by the proximity switch.

The present invention (an eighth invention described in claim 8)
According to the seventh aspect of the present invention,
At the tip of the rotating shaft, a processing tool for boring a soft work is disposed, and a chuck component of the processing tool is used as the circular detection plate, and a circumferential slot is bored in a circumferential direction. is there.

The present invention (a ninth invention according to claim 9)
The rotation member rotation detecting device according to the first aspect,
The detection unit is configured by a hole or a recess extending in the circumferential direction on the detection plate, and the detection sensor is disposed so as to face the hole or the recess of the detection plate; And a light receiver for receiving light that passes or reflects through the hole or the concave portion with light from the light projector.

[0014]

According to the first aspect of the present invention, there is provided a rotation detecting device for a rotating member according to the first aspect of the present invention, wherein the detecting plate is formed integrally with the rotating member and provided with the detecting portion extending in a circumferential direction. The sensor disposed opposite to the detection unit detects the rotation of the detection plate by detecting the detection unit in a non-contact manner, so that the rotation state of the rotation member can be detected. To play.

The rotation detecting device for a rotating member according to the second aspect of the present invention having the above-mentioned structure, wherein the detecting plate having the hole or the concave portion formed integrally with the rotating member and extending in the circumferential direction is perforated. The proximity switch disposed opposite to the hole or the recess detects the approach of the hole or the recess in a non-contact manner and detects the rotation of the detection plate. This has the effect of preventing erroneous detection and malfunction from occurring, and eliminating the need for fine sensitivity adjustment of the sensor.

In the rotation detecting device for a rotating member according to a third aspect of the present invention, in the second aspect, the proximity switch is provided on the circular detecting plate formed coaxially with a rotating shaft as the rotating member. Since the rotation of the detection plate is detected by detecting the approach of the circumferential slot formed in the circumferential direction in a non-contact manner, erroneous detection and erroneous operation due to the attachment of processing debris and dust and dust are prevented, and This has the effect of eliminating the need for fine sensitivity adjustment of the sensor.

According to a fourth aspect of the present invention, in the rotation detecting device for a rotating member according to the third aspect, the proximity switch provided on a bearing member for supporting the rotating shaft is provided as the rotating member. Since the rotation of the detection plate is detected by detecting the approach of the circumferential slot drilled in the circumferential direction on the circular detection plate formed coaxially with the rotation axis and detecting the rotation of the detection plate, processing dust and dust are removed. In addition to preventing erroneous detection and malfunction due to adhesion of dust and dust, it has the effect of eliminating the need for fine sensitivity adjustment of the sensor.

According to a fifth aspect of the present invention, in the rotation detecting apparatus for a rotating member according to the fourth aspect of the present invention, the capacitance type proximity switch or the high frequency oscillation type proximity switch constituting the proximity switch is made of metal. Since the approach of the circumferential slot formed in the circular plate is reliably detected as a change in the capacitance of the electrode or a change in the oscillation frequency, erroneous detection and malfunction due to the attachment of processing debris and dust or dust are prevented. This has the effect of preventing the sensitivity and making the subtle sensitivity adjustment of the sensor unnecessary.

According to a sixth aspect of the present invention, in the rotation detecting device for a rotating member according to the fifth aspect of the present invention, the rotation speed display means detects the rotation of the rotation shaft based on a rotation signal of the rotation shaft detected by the proximity switch. Since the number of revolutions is displayed, there is an effect that the number of revolutions can be constantly monitored.

According to a seventh aspect of the present invention, there is provided the rotation detecting device for a rotating member according to the sixth aspect, wherein the abnormality display means detects the rotation detected by the proximity switch when the rotation abnormality of the rotating shaft occurs. Since the rotation abnormality of the rotation shaft is displayed based on the rotation signal of the shaft, it is possible to inform the user of the abnormal rotation state.

According to an eighth aspect of the present invention, in the rotation detecting device for a rotating member according to the seventh aspect of the present invention, the proximity switch is provided in the machining tool for drilling a soft workpiece disposed at a tip of the rotating shaft. The approach of the circumferential slot formed in the circumferential direction of the chuck component as a circular detection plate is reliably detected as a change in the capacitance of the electrode or a change in the oscillation frequency. It is not necessary to provide a new member, and it is possible to provide an inexpensive system.

A ninth aspect of the present invention is the rotation detecting device for a rotating member according to the first aspect, wherein the photoelectric sensor constituting the detection sensor is arranged to face the hole or the concave portion of the detection plate. Since the light receiver receives the light that passes or is reflected by the hole or the recess with the light from the provided light projector and detects the rotation of the detection plate, the rotation state of the rotating member can be detected. This has the effect.

[0023]

Embodiments of the present invention will be described below with reference to the drawings.

(First Embodiment) As shown in FIGS. 1 and 2, a rotation detecting device for a rotating member according to a first embodiment comprises, as an example, a drill 1 as a working tool and a tip of a rotating shaft 2 as a rotating member. The luter 3 which is arranged in the vertical direction and moves up and down with respect to a soft work such as rubber to process a hole,
This is an application of the present invention.

The rotation detecting device for a rotating member according to the first embodiment comprises a detecting plate 4 integrally formed on the rotating shaft 2 and having a detecting portion 41 extending in a circumferential direction, the detecting plate 4 being provided with the detecting plate 4. 4
And a detection sensor 5 that is disposed to face the detection section 41 and optically detects the detection section 41 in a non-contact manner.

A circular flange 40, which is a chuck component formed integrally with the drill 1 as the working tool, is used as the detection plate 4, and the circular flange 40 extends in the thickness direction extending in the circumferential direction. A circumferential slot, which is a through hole, is formed as the detection unit 41.

The detection sensor 5 includes a light projector 51 provided on one side of the circular flange 40 as the detection plate 4 so as to face the circumferential slot 41, and the light from the light projector 51 And an optical sensor comprising a light receiver 52 for receiving the light passing through 41.

That is, a substantially inverted F fixed to the lower end of a bearing portion 20 which rotatably supports the rotary shaft 2 by a screw.
The light projecting device 51 is arranged on an upper projecting portion 54 projecting from the center of the letter-shaped bracket 53 in the longitudinal direction, and the light receiving device 52 is arranged on a lower projecting portion 55 projecting from the lower end.

Therefore, the light from the projector 51 is transmitted to the circular flange 40 formed integrally with the rotary shaft 2.
The circumferential slot 41 formed in the circular flange 4
Each time the rotation reaches 0, the light passes through the circumferential slot 41 and is received by the light receiver 52, whereby the rotation of the rotating shaft 2 and the drill 1 is detected.

As shown in FIG. 2, a bearing 20 for rotatably supporting the rotary shaft 2 is provided with a piston cylinder 26 as shown in FIG.
Is provided on a movable member 25 which is supported movably up and down for drilling by the drill 1.

The rotation detecting apparatus for a rotating member according to the first embodiment having the above-described configuration is arranged such that the circular flange 40 as the detecting plate formed integrally with the rotary shaft 2 together with the drill 1 is rotating. In the above, every time the circumferential slot 41 formed in the circular flange 40 reaches with the rotation, the light from the light projector 51 passes through the circumferential slot 41 and is received by the light receiver 52. Thus, the rotation of the rotating shaft 2 and the drill 1 is detected.

In the rotation member rotation detecting device according to the first embodiment having the above-described operation, the optical sensor constituting the detection sensor opposes the circumferential slot 41 of the circular flange 40 as the detection plate 4. The light receiver 52 receives the light passing through the circumferential slot 41 with the light from the light projector 51 disposed in the vertical direction and detects the rotation of the circular flange 40. Therefore, the drill 1 is disposed at the tip. This makes it possible to detect the rotation state of the rotating shaft 2.

Further, in the rotation detecting device for a rotating member according to the first embodiment, the rotating shaft 2 provided with the drill 1 at the tip thereof may be used.
It is possible to detect the rotation state of the motor, so that it may be used in abnormal rotation state where the rotation speed is lower or higher than the allowable rotation speed, and it is possible to prevent the occurrence of troubles caused by this rotation abnormality. It works.

(Second Embodiment) As shown in FIGS. 3 and 4, a rotation detecting device for a rotating member according to a second embodiment includes a rotary shaft 2 provided with the drill 1 as a working tool at a tip thereof. Detecting part 4 formed integrally with and extending in the circumferential direction
A circular flange 40 serving as a detection plate in which a circumferential concave portion 42 as a hole is formed, and a circular flange 40 are disposed so as to face the circumferential concave portion 42 of the circular flange 40. And a proximity switch 6 for detection.

A circular flange 40, which is a chuck component integrally formed with the drill 1 as the working tool, is used as the detection plate 4. The circular concave portion 42 is formed on one annular surface of the circular flange 40. The detection unit 41 is provided.

As shown in FIGS. 4 (A) and 4 (B), the circumferential concave portion 42 extends over one circular surface of the circular flange 40 over an angular range of slightly more than 30 degrees in the circumferential direction. , So as to have a constant depth in the thickness direction.

The proximity switch 6 includes a bracket 22 having a substantially L-shaped cross-section, which is disposed on a cylindrical bearing member 21 which supports the rotary shaft 2 having the cutting tool 1 disposed at the tip thereof. It is arranged at the tip of.

The proximity switch 6 controls the approach of the circumferential recess 42 formed in the circular flange 40 made of metal.
It is constituted by a capacitance type proximity switch which detects a change in capacitance of an electrode in the switch.

That is, the capacitance of the electrode of the proximity switch 6 is represented by a charged electric charge with respect to a voltage applied to the electrode. When a metal body approaches the electrode, the electric charge in the metal body is induced and the electrode is close to the electrode. The opposite pole appears on the side, and the same pole appears on the side farther from the electrode. As a result, since the electrode surface charge and the metal surface charge are pulled together, more charge is sent to the electrode and the capacitance of the electrode is increased. The proximity switch 6 may be of a high frequency oscillation type for detecting a change in the oscillation frequency in the high frequency oscillation circuit, in addition to the capacitance type.

The controller 7 comprises a sequencer connected to the proximity switch 6 as shown in FIG. 3, and the capacitance of the electrode of the proximity switch 6 according to the rotation speed of the circular flange 40 and the drill 1. The number of rotations of the circular flange 40 and the drill 1 is detected by detecting a change in the oscillation frequency or by outputting a rotation signal by detecting a change in the oscillation frequency. When the rotation speed is out of the allowable range within the upper limit rotation speed, an abnormality display signal for displaying an abnormality is output.

The rotation speed display means 8 is connected to the controller 7 as shown in FIG.
And a display unit 81 for displaying the number of rotations of the rotating shaft based on the number of rotations signal from the controller 7 based on the rotation signal of the rotating shaft detected by the control unit.

The abnormality display means 9 is connected to the controller 7 as shown in FIG. 3, and based on the rotation speed signal of the rotating shaft detected by the proximity switch 6, the detected rotation speed is set to a lower limit rotation speed and an upper limit rotation speed. When the rotation speed is out of the permissible range, an abnormality display signal for displaying an abnormality is output from the coil roller 7, so that when the abnormality display signal is input, a display for displaying the rotation abnormality of the rotating shaft is displayed. A section 91 is provided.

The rotation detecting device for a rotating member according to the second embodiment having the above-described configuration is arranged such that when the drill 1 and the circular flange 40 serving as the working tools rotate, the proximity switch 6 constituting the proximity switch 6 is rotated. Or the high-frequency oscillation type proximity switch is made of the circular flange 4 made of metal.
The approach in accordance with the rotation of the circumferential recessed portion 42 formed at zero is detected as a change in the capacitance of an electrode in the switch or as a change in the oscillation frequency.

The controller 7 calculates the rotation speed of the circular flange 40 and the drill 1 based on the rotation signal output from the proximity switch 6 in accordance with the rotation speed of the circular flange 40 and the drill 1. When the calculated rotation speed is outside the allowable range between the lower limit rotation speed and the upper limit rotation speed, an abnormality display signal for displaying an abnormality is output.

The rotation speed display means 8 displays the rotation speed of the rotation shaft on the basis of the rotation speed signal from the controller 7 based on the rotation signal of the rotation shaft detected by the proximity switch 6. .

When the detected rotation speed is out of the allowable range between the lower limit rotation speed and the upper limit rotation speed based on the rotation speed signal of the rotation shaft detected by the proximity switch 6, Since an abnormality display signal for displaying an abnormality is output from the coil roller 7, when the abnormality display signal is input, the display unit displays the rotation abnormality of the rotating shaft.

The rotation detecting device for a rotating member according to the second embodiment, which has the above-described operation, is provided with the circumferential recess formed integrally with the drill 1 and the rotating shaft 2 as the working tool and extending in the circumferential direction. The circular flange 40 provided with 42
The proximity switch 6 disposed opposite to the circumferential concave portion 42 detects the circumferential concave portion 42 serving as the detecting portion in a non-contact manner and detects the rotation of the circular flange 40 as the detecting plate. Therefore, it is possible to detect the rotation state of the drill 1 and the rotating shaft 2.

In the rotation detecting device for a rotating member according to the second embodiment, the proximity switch 6 detects the approach of the circumferential concave portion 42 formed in the circumferential direction of the circular flange 40 in a non-contact manner. Since the rotation of the circular flange 40 and the drill 1 is detected, erroneous detection and erroneous operation due to the attachment of processing dust, dust, and dust as in the optical rotation detection device of the first embodiment are prevented, and the sensor is detected. This makes it possible to eliminate the need for fine sensitivity adjustment.

Further, in the rotation detecting device for a rotating member according to the second embodiment, the proximity switch 6 is arranged such that the L-shaped bracket 2 is attached to the bearing member 21 which supports the rotating shaft 2.
2, the proximity switch 6 can be disposed close to the circumferential concave portion 42 formed in the circular flange 40 as the detection plate in the circumferential direction. This has the effect that the operation can be accurately and reliably performed.

In the rotation detecting device for a rotating member according to the second embodiment, the proximity switch is constituted by the capacitance type proximity switch or the high frequency oscillation type proximity switch.
Since the approach of the circumferential concave portion 42 formed in the metal circular flange 40 is reliably detected as a change in the capacitance of the electrode or a change in the oscillation frequency, processing dust such as the above-described optical rotation detection device is used. In addition to preventing erroneous detection and erroneous operation due to dust or dust, the delicate sensitivity adjustment of the sensor is not required.

Further, the rotation detecting device for a rotating member according to the second embodiment is characterized in that the circular concave portion 42 is formed on the lower surface of the metal circular flange 40 opposite to the upper surface on which the drill 1 as the working tool is disposed. Because of the perforation, there is an effect of preventing processing dust, dust and dust from adhering structurally.

In the rotation member rotation detecting device according to the second embodiment, the rotation number display means 8 displays the rotation number of the rotation shaft based on the rotation signal of the rotation shaft detected by the proximity switch. This has the effect that the rotational speed can always be monitored.

Further, in the rotation detecting device for a rotating member according to the second embodiment, when the abnormality displaying means 9 detects the rotation abnormality of the rotating shaft, the abnormality displaying means 9 can detect the rotation of the rotating shaft based on the rotation signal of the rotating shaft detected by the proximity switch. Since the abnormal rotation of the rotating shaft is displayed, the state of abnormal rotation is thoroughly known,
This has the effect of making it possible to perform necessary measures.

Further, in the rotation detecting device for a rotating member according to the second embodiment, the proximity switch is provided with a drill 1 as a machining tool for boring a soft work disposed at a tip of the rotating shaft 2 and as the detecting plate. The approach of the circumferential concave portion 42 formed in the circumferential direction of the circular flange 40 of the chuck component is reliably detected as a change in the capacitance of the electrode or a change in the oscillation frequency. There is no need to provide a new member for use, and an effect is obtained that an inexpensive system can be provided.

The above-described embodiments have been described by way of example only, and the present invention is not limited to these embodiments. Those skilled in the art will recognize from the claims, the detailed description of the invention, and the drawings. Modifications and additions are possible without departing from the technical idea of the present invention.

In the first embodiment described above, an example is described in which a transmission type sensor including a pair of opposedly arranged light emitters and light receivers is used as an example of an optical sensor. However, the present invention is not limited thereto. But not
It is also possible to adopt a mode in which a concave portion is formed on one surface of the circular flange 40, a bottom surface is used as a reflecting surface, and a pair of a light emitting device and a light receiving device are arranged on the same side.

In the second embodiment, as an example of the detection plate and the detection portion, a circumferential concave portion 42 is formed on the lower surface of the circular flange 40 from the viewpoint of structurally preventing the attachment of processing dust, dust and dirt. Although an example has been described, the present invention is not limited thereto, and a circumferential slot of a hole penetrating the circular flange 40 in the thickness direction,
A fan-shaped hole or the like having a large opening area can be adopted.

[Brief description of the drawings]

FIG. 1 is a partially enlarged view showing a main part of a rotation detecting device for a rotating member according to a first embodiment of the present invention.

FIG. 2 is a side view showing a processing apparatus provided with a large number of luter apparatuses to which the first embodiment is applied.

FIG. 3 is a front view showing a rotation member rotation detection device according to a second embodiment of the present invention.

FIG. 4 is a plan view and a cross-sectional view illustrating a detection plate and a detection unit according to a second embodiment.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 drill 2 rotating shaft 4 detecting plate 40 circular flange 41 detecting unit 42 circumferential recess 6 proximity switch

Continued on the front page (72) Inventor Noriharu Abe 1 Ochiai Nagahata, Kasuga-cho, Nishi-Kasugai-gun, Aichi Prefecture Inside Toyoda Gosei Co., Ltd. Inside the corporation

Claims (9)

[Claims] 1. A rotating member which is integrally formed with a rotating member,
A detection plate provided with a detection portion extending in a circumferential direction, and a detection sensor disposed to face the detection portion of the detection plate and detecting the detection portion in a non-contact manner. A rotation detecting device for a rotating member. 2. The detection unit according to claim 1, wherein the detection unit includes a hole or a recess extending in a circumferential direction of the detection plate, and the detection sensor faces the hole or the recess of the detection plate. And a proximity switch for detecting rotation of the detection plate by detecting the approach of the hole or recess in a non-contact manner. 3. The method according to claim 2, wherein the detection plate is formed by a circular plate formed coaxially with a rotation axis as the rotation member, and a circumferential slot is formed in a circumferential direction. A rotation detecting device for a rotating member. 4. The rotation detection device according to claim 3, wherein the proximity switch is provided on a bearing member that supports the rotation shaft. 5. The capacitance proximity switch according to claim 4, wherein the proximity switch detects an approach of the circumferential slot formed in the metal circular plate as a change in capacitance of an electrode. A rotation detection device for a rotating member, comprising a high-frequency oscillation type proximity switch that detects a change in oscillation frequency in a high-frequency oscillation circuit. 6. The rotation of a rotating member according to claim 5, further comprising rotation number display means for displaying a rotation number of the rotation shaft based on a rotation signal of the rotation shaft detected by the proximity switch. Detection device. 7. The rotation detection of a rotating member according to claim 6, further comprising abnormality display means for displaying rotation abnormality of the rotation shaft based on a rotation signal of the rotation shaft detected by the proximity switch. apparatus. 8. The processing tool according to claim 7, wherein a machining tool for boring a soft work is disposed at a tip of the rotating shaft, and a chuck component of the machining tool is the circular detection plate, and a circumferential slot is circular. A rotation detecting device for a rotating member, which is provided in a circumferential direction. 9. The detection unit according to claim 1, wherein the detection unit is formed by a hole or a recess extending in the detection plate in a circumferential direction, and the detection sensor is opposed to the hole or the recess of the detection plate. Rotation detection of a rotating member, characterized by comprising a photoelectric sensor comprising: a light transmitter arranged as described above; and a light receiver for receiving light that passes or reflects through the hole or the concave portion with light from the light projector. apparatus.