JP2001116509A - Operation position detecting apparatus for rotating body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an operation position detecting apparatus in which a detection knit having rotation-rectilinear propagation converting mechanism can be easily built in a casing and maintenance is facilitated. SOLUTION: A switch guide 52 is built in a casing 20 of a transfer unit 2 transferring rotation or swing of a swinging shaft 11 of a swinging unit 1 to a table 42. A rotation-rectilinear propagation converting mechanism 51 converting rotation or a rotation power transferring member 21 which are generated by the swinging unit 1 to a rectilinear propagation movement in the axial direction of the rotation, and an insertion fixing trench 58 for inserting a magnetism detecting switch 70 are installed in the switch guide 52. When the rotation power transferring member 21 rotates or swings, a screw shaft 53 is rotated at the position by a gear 54 of the converting mechanism 51. A magnet 56 of a rectilinear propagation member 55 screwed into the screw shaft moves along the screw shaft. This movement position is detected by the magnetism detecting switch 70 fixed to the trench 58, and the position of a rotating body which is rotated or swung by a driving axle is detected.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a rotary actuator for rotating a rotary table.
In a device having a rotating body that rotates in a casing,
The present invention relates to an operation position detection device that detects the operation position of the rotating body.

[0002]

2. Description of the Related Art In a vane type rotary actuator, as disclosed in Japanese Patent Publication No. 5-82140, a magnet is attached to one end of a shaft, and a magnetic detection switch is attached to an outer periphery of a casing around the shaft. Is usually detected. However, in such a switch mounting structure, it is necessary to adjust the mounting position of the switch on the circumference of the shaft. Therefore, depending on the detection position, it may be difficult to fix the switch, or the switch may be provided on the switch. The lamp indicating the detection becomes difficult to see, and the switch can be mounted at any position on the circumference of the shaft. Since the position detecting mechanism is provided, there is also a problem that the axial dimension of the rotary actuator becomes long. Such a problem is not limited to the above-described rotary actuator, but also applies to other devices that detect the rotation / swinging position of the rotating body provided in the casing in a non-contact manner.

On the other hand, as disclosed in Japanese Patent Application Laid-Open No. H8-77898, a switch mounting hole for swing detection can be provided in the body and the switch can be fixed to the mounting hole. The size in the axial direction is smaller than that of the above-mentioned conventional example, and there is an advantage that the wiring can be led out in a fixed direction and the workability is excellent. There is a problem that it is not possible or that a lamp for displaying the detection cannot be attached to the switch, and it becomes difficult to display the lamp.

[0004]

SUMMARY OF THE INVENTION The present invention has been made to solve such a problem, and its technical problem is basically that of a rotating or oscillating rotary supported by a casing. When the operating position of the body can be detected at any position around the casing, the position of the detection switch is adjusted in the direction parallel to the axis of the rotating body on the outer surface of the casing to detect any rotational operating position of the rotating body. It is possible to eliminate the need to mount the switch around the casing or at a position that is difficult to see, so that the switch can always be installed at a position where the casing is easily visible,
An object of the present invention is to provide an operating position detecting device which can lead out wiring in a certain direction and is excellent in workability such as mounting of a detection switch and position adjustment.

A more specific technical object of the present invention is to provide a rotation-to-straight conversion mechanism for converting the rotation of a rotating body into a linear movement in an axial direction together with a switch guide having a switch insertion groove and the like by one detection. It is an object of the present invention to provide an operating position detecting device which is configured as a unit and which can be easily mounted on a casing to facilitate assembly and maintenance. Another technical problem of the present invention is to provide an operating position detecting device suitable for detecting a rotation position of a table in a rotary table in which a table to which a load is mounted is swung by a rotary actuator driven by fluid pressure. .

[0006]

According to the present invention, there is provided an operating position detecting apparatus for detecting an operating position of a rotating or swinging rotating body supported in a casing. A rotation-linear conversion mechanism for converting the rotation of the rotary body into a linear motion in the axial direction of the rotation between the rotary body and a casing around the rotary body; A magnet for position detection is attached to a rectilinear member that moves rectilinearly along the guide provided in the above, and the magnetic detection switch is positioned in the outer surface of the casing in a range where the magnet rectilinearly moves, in proximity to the movement locus of the magnet. A switch insertion groove is provided so as to be adjustable.

In the above-described operating position detecting device, a rotation-to-straight conversion mechanism for converting the rotation transmitted from the rotating body into a linear motion, a guide for a linear member provided with a magnet, and a magnetic detection switch are provided. A detection unit is constituted by integrally assembling a switch guide provided with a mounting groove, and an assembling groove parallel to the axis of the rotating body is cut in the casing, and the switch guide in the detection unit is assembled. It can be fitted and fixed in the groove.

The operating position detecting device can be applied to the detection of the rotational position of a table in a rotary table, that is, a rotary table in which a table on which a load is mounted is swung by a hydraulic actuator driven by a hydraulic actuator. Rotation power transmission member. In addition, the rotation-straight conversion mechanism in the operating position detecting device specifically, a gear meshing with a gear provided around the rotating body is fixed on a screw shaft disposed in parallel with the axis of the rotating body. It is appropriate that the screw shaft is screwed with a nut portion of a rectilinear member that moves rectilinearly along a guide.

In the operating position detecting device having the above structure, the rotation transmitted from the rotating body is converted into a linear motion by a rotation-linear conversion mechanism, and transmitted to a linear member provided with a magnet, and the linear member is rotated. Since the switch is moved along the guide provided on the switch guide according to the amount of rotation of the body, the detection switch is mounted at a position where the outer surface of the casing is easily visible, and the switch is connected to the axis of the rotating body on the outer surface of the casing. By adjusting the position in the direction parallel to the direction of rotation, it is possible to detect any rotational movement position of the rotating body, the wiring can always be led out in a fixed direction, and it is excellent in workability such as mounting of detection switch and position adjustment It will be.

Further, in the above operating position detecting device,
If the rotation-linear conversion mechanism that converts the rotation of the rotating body into linear movement in the axial direction is configured as one detection unit together with a switch guide having a switch insertion groove and the like, it can be easily attached to and detached from the casing. This makes it possible to easily assemble and maintain a rotation / straight conversion mechanism, a switch, and the like.

[0011]

1 to 6 show an embodiment in which the apparatus for detecting the operating position of a rotating body according to the present invention is applied to a rotary table driven by a fluid pressure. As can be seen from FIG. 1, the rotary table of this embodiment includes a swing unit 1 driven by fluid pressure, a transmission unit 2 for transmitting the rotation swing of the swing unit 1, and a rotation unit via the transmission unit 2. A table unit 4 to be driven and a detection unit 5 for inserting a switch for detecting a rotational position are provided, and these units are combined as shown in FIG.

The swing unit 1 in the illustrated embodiment.
Are composed of a vane type rotary actuator driven by compressed air. That is, the swing shaft 11 provided with the vane 12 is rotatably accommodated in the body 10, and a pair of supply / discharge ports (see FIG. 3) 1 is provided on both surfaces of the vane 12.
By alternately supplying and discharging compressed air from the third and the third 13, the rocking shaft 11 is rocked within a certain angle range, and the rocking shaft 11 is guided to the outside by the rocking shaft 11. A stopper guide 14 is fixed to the tip of the swing shaft 11, as clearly shown in FIG. The stopper guide 14 is provided with a concave portion 16 on its outer periphery for fitting a convex portion 26 provided on the rotational power transmission member 21 of the transmission unit 2. In addition, although the case where the above-mentioned vane type rotary actuator is used is shown as the swing unit 1, any actuator that performs rotation or swing movement can be adopted.

The transmission unit 2 has a casing 2
0 is connected to the body 10 of the rotary actuator, and in the casing 20, the rotation power transmission member 21 is opposed to the stopper guide 14, and fitted around the transmission member 21 in the recess 16 of the stopper guide 14. The projection 26 is provided. Further, the casing 20 has a pair of adjusters (adjustment bolts) 2 with which the projections 26 come into contact when the rotational power transmission member 21 swings.
8, 29 are screwed from the outside so as to be able to advance and retreat, and protrude into the rotation range of the convex portion 26.

On the other hand, the table unit 4 comprises a casing 20 of the transmission unit 2 and a frame member 4 attached thereto.
1, a bearing 44 is held by the bearing 44, the table 42 is rotatably supported by the bearing 44, and the rotary power transmission member 21 is connected to the table 42 so that the transmission member 21 is It is supported rotatably. Therefore, the rotational force of the rotary actuator is transmitted to the table 42 through the stopper guide 14 connected to the pivot shaft 11 and the rotational power transmission member 21. The table 42 is provided with a screw hole 43 for mounting in order to appropriately mount a load on the outer surface thereof.

The detection unit 5 is for detecting the operating position of the rotating body composed of the rotary power transmission member 21 in the casing 20. The rotation unit converts the rotation transmitted from the transmission member 21 into a linear motion. A straight-ahead conversion mechanism 51,
And a switch guide 52 for holding it. As shown in FIGS. 4 and 5, the rotation-to-straight conversion mechanism 51 includes a switch guide 52 having a screw shaft 53 rotatably supported with its axis oriented parallel to the axis of the rotary power transmission member 21. A gear 54 (see also FIG. 1) meshing with the gear 25 provided around the transmission member 21 is fixed on the screw shaft 53, and the linear member 55 driven in the axial direction is attached to the screw shaft 53. It is configured by screwing the nut portion 55a. Further, a magnet 56 for position detection is attached to the rectilinear member 55.

On the other hand, in the switch guide 52, as clearly shown in FIGS. 4 to 6, an assembling groove 22 which is parallel to the axis of the transmission member 21 is formed in the casing 20.
A groove 23 is provided on the inner side wall of the mounting groove 22, and a convex ridge that fits with the groove 23 on the left and right outer surfaces of the switch guide 52. 57 are provided, and are fitted and fixed to the mounting groove 22 by fitting the concave ridges 23 and the convex ridges 57. Further, the switch guide 52 is provided with two insertion grooves 58 of the magnetic detection switch 70 arranged in parallel so as to be located on the outer surface side of the casing 20 (see FIG. 6). In order to position the mechanism 51 between the transmission member 21 and the inside of the casing 20, the support hole 59 of the screw shaft 53 is disposed inside the switch guide 52, and
A guide 60 is provided along the screw shaft 53 for causing the linear member 55 to move linearly without rotating.

Therefore, the detection unit 5 is constructed by integrally assembling the rotation / straight conversion mechanism 51 and the switch guide 52, and between the transmission member 21 and the casing 20 around the transmission member 21, the detection unit 5 A rotation-to-straight conversion mechanism 51 for converting rotation into linear movement is provided, and is fitted into the mounting groove 22 of the casing 20 in the transmission unit 2 so that the magnet 56 moves linearly by the rotation-to-straight conversion mechanism 51. The magnetic detection switch 70 can be inserted so as to be position-adjustable in proximity to the locus of movement of the magnet 56.

As shown in FIGS. 2 and 6, the magnetic detection switch 70 has a switch section 71, a fixing screw 72, a lighting display section 73, and a lead wire 74.
A fixing block 75 for fixing the switch 0 to the insertion groove 58 has a holding portion 76 for holding the switch 70 and an engagement shoulder 77 that engages with the engagement step 62 on the inner surface of the insertion groove 58. It has. Therefore, the insertion groove 5 of the detection switch 70
In a state where the engaging shoulder 77 of the fixing block 75 is engaged with the engaging step 62 in FIG. 8, the switch portion 71 of the switch 70 is held inside the holding portion 76 of the fixing block 75. By pressing the fixing screw 72 and pressing the tip of the fixing screw 72 against the inner bottom of the insertion groove 58, the detection switch 70 can be fixed together with the fixing block 75 at an arbitrary position in the insertion groove 58.

The object of the detection of the operating position by the detection unit 5 is not limited to the rotary power transmission member 21 provided between the swing unit (rotary actuator) 1 and the table 42 as shown in the figure. The present invention can be applied to various types of rotating bodies that rotate in a casing.

When the rotary actuator constituting the swing unit 1 is driven, the rotary table having the above-described structure is moved relative to the table 42 via the stopper guide 14 connected to the swing shaft 11 of the rotary actuator and the rotary power transmission member 21. Torque is transmitted to the table 4
2 can be swung. In such an operation, the transmission member 21 driven by the rotary actuator
The rotational force is transmitted to the gear 54 of the screw shaft 53 that meshes with the gear 25, and the screw shaft 53 is rotated by the gear 54, so that the nut portion 55a is screwed straight into the screw shaft 53. The member 55 is the switch guide 52
Move along the screw shaft 53 along the guide 60, and the position detecting magnet 56 provided on the rectilinear member 55 moves along the screw shaft 53, so that the magnetic detection is performed at a required position in the switch insertion groove 58. By arranging the switch 70, it is possible to detect the rotational position of the rotating power transmission member 21, that is, the rotating body.

According to such a rotary table, the transmission unit 2 is provided with the rotation-to-straight conversion mechanism 51, and the translation member 55 is provided with the magnet 56 which is detected by the switch 70. To a magnet 56 parallel to the axis of rotation.
Switch 7
0 can be detected by being attached to a fixed position on the side surface of the casing 20, thereby eliminating the need to mount the switch 70 around the casing 20 or at a position where it is difficult to view the casing 20. Position. Further, in a rotary table in which a table unit 4 for mounting a load and a rotary actuator for swinging the table 42 are integrated, a rotation-straight conversion mechanism 51 is provided in a dead space of the intermediate transmission unit 2 and a switch is provided for the linear movement. The switch 70 can be mounted on the side surface of the table unit main body by disposing the detection magnet 56 and converting the swing of the rotary actuator into the linear movement of the magnet 56. , The rotary table can be made compact, and the switch 70 can be adjusted in the same direction as the operation of the magnet 56, so that an arbitrary rotational position of the rotating body can be detected.

Further, since the wiring of the switch 70 is integrated in one direction, and the switch 70 is mounted outside the casing 20, the lamp of the lighting display unit 73 can be easily recognized. Further, the switch guide 52 is provided with a rotation-linear conversion mechanism member 5 having a magnet 56 on one side.
1 is provided with a support hole 59 in which the switch 1 can be freely mounted, and an insertion groove 58 in which the switch 70 can be moved and fixed in a linear direction.
The protrusions 57 and the recesses 23 provided on the switch guide 52 and the casing 20 make it easy to attach and detach these members. It can be excellent.

[0023]

According to the rotary table of the present invention described in detail above, a rotation-linear conversion mechanism for converting the rotation of the rotary body into a linear motion is provided between the rotary body and the casing around the rotary body. The rotating body having the rotating operation position detecting mechanism can be made compact. Further, since the detection unit having the rotation / straight conversion mechanism and the insertion groove of the magnetic detection switch is assembled to the casing, the assembly and maintenance of the detection unit are easy. Further, since the magnetic detection switch can be mounted at a position where the casing is easily visible, the workability such as the position adjustment of the switch can be improved.

[Brief description of the drawings]

FIG. 1 is a vertical sectional side view of an embodiment of the present invention.

FIG. 2 is a cross-sectional plan view of the same.

FIG. 3 is a front view of the same.

FIG. 4 is an exploded perspective view of a rotation / straight conversion mechanism.

FIG. 5 is a perspective view of the same assembled state.

FIG. 6 is an exploded perspective view of the detection unit.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 swing unit 2 transmission unit 4 table unit 5 detection unit 11 swing shaft 20 casing 21 rotation power transmission member 22 assembly groove 25 gear 42 table 51 rotation-linear conversion mechanism 52 switch guide 53 screw shaft 54 gear 55 linear member 55a Nut part 56 Magnet 58 Insertion groove 60 Guide 70 Magnetic detection switch

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 2F063 AA35 BA30 DA04 DA05 DC04 GA00 ZA01 3H081 AA21 CC21 GG15 GG23 5G046 BA06 BD03 BD14 BD25

Claims (4)

[Claims] 1. An operating position detecting device for detecting an operating position of a rotating body supported or rotated in a casing and rotating or swinging, wherein the rotating body is disposed between the rotating body and a surrounding casing. A rotation-to-straight conversion mechanism that converts the rotation of the rotation into a linear movement in the axial direction of the rotation is provided, and a magnet for position detection is attached to a linear member that linearly moves along a guide provided on the casing side by the mechanism. A rotating body provided in the outer surface of the casing, in a range where the magnet linearly moves, a switch insertion groove in which the position of the magnetic detection switch is adjustable so as to be close to the movement trajectory of the magnet; Operating position detecting device. 2. A rotary-to-linear conversion mechanism for converting the rotation transmitted from the rotating body into a linear motion, a guide for a linear member provided with a magnet, and an insertion groove for inserting a magnetic detection switch. The detection unit was formed by integrally mounting the switch guide, and an installation groove parallel to the axis of the rotating body was cut in the casing, and the switch guide in the detection unit was fitted and fixed in the installation groove. The operating position detecting device for a rotating body according to claim 1, wherein: 3. A rotary power transmission member provided between the actuator and the table of a rotary table for rotating the table by a rotary actuator driven by a fluid pressure. 3. The operating position detecting device for a rotating body according to claim 1 or 2. 4. A gear meshing with a gear provided around the rotating body is fixed on a screw shaft provided in parallel with the axis of the rotating body,
The rotation according to any one of claims 1 to 3, wherein a rotation-to-straight conversion mechanism is configured by screwing a nut portion of a rectilinear member that moves rectilinearly along the guide to the screw shaft. Body position detection device.