JP2001280310A - Sensor mounting mechanism for pneumatic apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sensor mounting mechanism 1 for mounting a position detecting sensor 7 in a sensor mounting groove 6 provided in the outer face of a pneumatic apparatus in a fixed position adjustable manner, giving no load on the position detecting sensor 7, even if a screw member 15 is forced therein more than required, and so preventing breakage or malfunction of the position detecting sensor 7 in the screwing. SOLUTION: The sensor mounting mechanism comprises a pair of opposed extension portions 16 provided along both edges of an opening portion of the sensor mounting groove 6, the screw member 15 to be inserted in a through-hole 12 in the position detecting sensor 7 until it is abutted to a bottom face 6a of the sensor mounting groove 6, a female screw member 13 to be relatively displaced after threaded to the screw member 15 and pushed against reverse faces 16a of the extension portions 16. An engagement portion 18 is provided on the screw portion 15 for restricting the position detecting sensor 7 from being moved away from the bottom face 6a of the sensor mounting groove 6 on completing mounting.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sensor mounting mechanism for a pneumatic device in which a position detection sensor is fixedly adjustable in a sensor mounting groove provided on an outer surface of the pneumatic device.

[0002]

2. Description of the Related Art As shown in FIG. 11, a known sensor mounting mechanism 51 of this type is provided so as to face each other along both edges of an opening of a sensor mounting groove 53 provided on an outer surface of a pneumatic device 52. And a screw member 57 that is screwed into a screw hole 56 provided in the position detection sensor 55 and abuts against the bottom surface 53a of the sensor mounting groove 53. The position detection sensor 55 is displaced upward in the figure by screwing with the member 57, and is directly pressed against the back surface 54a of the overhang portion 54.

Therefore, the conventional sensor mounting mechanism 5
According to No. 1, the more strongly the screw member 57 is screwed in, the more strongly the position detection sensor 55 is pressed against the back surface 54a of the overhang portion 54. Therefore, if the screw member 57 is screwed more than necessary, the position detection sensor 55 is deformed. Damage or malfunction.

[0004]

SUMMARY OF THE INVENTION In view of the foregoing, the present invention does not apply a load to the position detecting sensor even if the screw member is screwed in more than necessary, so that the position detecting sensor may be damaged or erroneously screwed. It is an object of the present invention to provide a sensor mounting mechanism capable of preventing operation.

[0005]

In order to achieve the above object, a sensor mounting mechanism according to a first aspect of the present invention mounts a position detecting sensor in a sensor mounting groove provided on an outer surface of a pneumatic device so as to adjust a fixed position. In the sensor mounting mechanism, a pair of projecting portions provided so as to face each other along both edges of the opening of the sensor mounting groove, and the sensor mounting groove inserted into a through hole provided in the position detection sensor. And a female screw member which is relatively displaced by screwing with the screw member and pressed against the back surface of the overhang portion, and when the mounting is completed, the position detection sensor is An engagement portion for restricting movement in a direction away from the bottom surface is provided on the screw member.

According to a second aspect of the present invention, there is provided a sensor mounting mechanism including a pneumatic device, a sensor mounting groove provided in a longitudinal direction of an outer surface of the pneumatic device, and both edges of an opening of the sensor mounting groove. A pair of overhanging portions that overhang
A position detection sensor having a through hole movably inserted into the sensor mounting groove and opening toward the bottom surface of the sensor mounting groove, and a screw member inserted into the through hole and abutting on the bottom surface of the sensor mounting groove. A sensor mounting mechanism in a pneumatic device having a nut screwed to the screw member, wherein the screw member holds the position detection sensor with a slight gap between the screw member and a bottom surface of the sensor mounting groove. An engagement portion is provided.

According to a third aspect of the present invention, there is provided the sensor mounting mechanism according to the second aspect.
A projection is provided on one of the inner peripheral surface of the through hole and the outer peripheral surface of the screw member, and an annular concave portion engageable with the projection is provided on the other.

In the sensor mounting mechanism according to the first aspect of the present invention having the above structure, when the screw member is screwed in, the female screw member is pressed against the back surface of the overhanging part instead of the position detection sensor instead of the position detection sensor. Therefore, it is possible to prevent a load due to screwing from acting on the position detection sensor. In addition, since the screw member is provided with an engagement portion that restricts the position detection sensor from moving away from the bottom surface of the sensor mounting groove when the mounting is completed, the position detection sensor may rattle in the sensor mounting groove. Can be effectively prevented.

Further, the present invention has the above configuration.
In the sensor mounting mechanism according to the above, when the screw member is screwed in, the nut is pressed against the back surface of the overhang instead of the position detection sensor instead of the position detection sensor. It is possible to prevent it before it happens. Also, since the position detection sensor is sandwiched between the engagement portion provided on the screw member and the bottom surface of the sensor mounting groove with a slight gap, it is possible to prevent the position detection sensor from rattling in the sensor mounting groove. This can be effectively prevented.

[0010] In addition, in the sensor mounting mechanism according to the third aspect of the present invention having the above-described configuration, the sensor mounting mechanism is provided on one of the inner peripheral surface of the through hole of the position detecting sensor and the outer peripheral surface of the screw member. The projection and the annular recess provided on the other are engaged with each other, so that the screw member inserted into the through hole of the position detection sensor before mounting the position detection sensor on the sensor mounting groove, and the screw member It is possible to prevent the screwed nut from dropping from the position detection sensor.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described with reference to the drawings.

First Embodiment FIG. 1 is a perspective view of an air cylinder 2 which is an example of a pneumatic device provided with a sensor mounting mechanism 1 according to an embodiment of the present invention, and FIG. The exploded perspective view of the position detection sensor 7, the screw member 15, and the nut 13 which is a female screw member according to the embodiment is shown.
3 is a plan view of the sensor mounting mechanism 1, FIG. 4 is a cross-sectional view taken along line AA in FIG. 3, and FIG. 5 is a line BB in FIG.
It is a line expanded sectional view.

The air cylinder 2 shown in FIG. 1 supplies and discharges compressed air, which is a working fluid, to the inside of the body 3 from a pair of piping ports 4 provided in the body 3 so that a piston (not shown) and a The rod 5 that extends and protrudes from one end face 3a of the body 3 is linearly reciprocated in the axial direction. On the outer surface 3b of the body 3, a plurality of sensor mounting grooves 6 are provided along the longitudinal direction of the body 3 and in parallel with the reciprocating direction of the piston and the rod 5.
Position detecting sensors 7 are movably inserted into the sensor mounting grooves 6 one by one.

As shown in FIG. 2, this position detecting sensor 7
Is a magnetic proximity switch (not shown) which is a sensor element
An indicator light 8 for displaying the operating state of the magnetic proximity switch; a rod-shaped resin sensor case 9 containing the magnetic proximity switch and the indicator light 8; and a sensor case 9 connected to the magnetic proximity switch. And a lead wire 10 extending from the rear end 9a to the outside. The magnetic proximity switch outputs a signal when a magnet (not shown), which is a detection target, is attached to the piston, and outputs this signal to the lead wire. It is configured to transmit the data to a desired location via 10. The object to be detected and the sensor element constituting the position detecting mechanism are not limited to the magnet and the magnetic proximity switch. The object to be detected is made of metal, and the sensor element detects the induced current of the metal. In this case, the body 2 may be formed of a non-metallic material such as a synthetic resin so that the sensor element is not affected by the molding material of the body 2. I do.

A concave step 11 is provided at the tip of the sensor case 8, and the concave step 11 is provided with a through hole 12 opening toward the bottom surface 6 a of the sensor mounting groove 6.
The inner peripheral surface of the through hole 12 is not threaded.
A nut 13 having a flat rectangular shape is provided in the concave step portion 11 so as to correspond to the flat shape thereof, and a screw-shaped screw member screwed into a screw hole-shaped screw means 14 provided in the nut 13. 15 is inserted into the through hole 12 and contacts the bottom surface 6 a of the sensor mounting groove 6. The width of the pair of sides of the nut 13 is substantially equal to the width of the sensor case 9, and the width of the sensor mounting groove 6 is set slightly larger than these widths. It is stopped by contact.

The sensor mounting groove 6 is provided with a pair of projecting portions 16 projecting oppositely along both edges of the opening, and the nut 13 is turned by the rotation of the screw member 15. 16 is pressed from its back surface 16a.

The screw member 15 has a bar-shaped or pin-shaped reduced diameter portion 17 provided at the lower end thereof, and an engaging portion 18 facing the upper surface of the concave step portion 11 is formed as an annular facing surface. The engagement portion 18 and the bottom surface 6a of the sensor mounting groove 6
The sensor case 9 is interposed therebetween. In the screw member 15, the length L ₁ to the distal end surface (lower surface) of the reduced diameter portion 17 from the length L ₁ i.e. the engagement portion 18 of the reduced diameter portion 17 is a through hole 1
2 is set slightly larger than the length L ₂ i.e. recessed step from top surface 11 to the lower surface of the sensor casing 9 the length L ₂ of the sensor case 9, thereby the upper surface and the engagement of the recessed step 11 A gap 19 having a predetermined size is set between the first and second portions 18 so that the upper surface of the concave step 11 is not pressed by the engagement portion 18. Also, the through hole 1
The inner diameter of 2 is set substantially equal to the outer diameter of the reduced diameter portion 17, so that the play between the screw member 16 and the sensor case 9 is extremely small.

Next, a method of mounting the position detecting sensor 7 having the above configuration will be described.

First, the screw means 1 formed on the nut 13
4, the screw member 15 is screwed, and the reduced diameter portion 1 of the screw member 15
7 is inserted into the through hole 12 of the sensor case 9. Then
After inserting the position detection sensor 7 from one end face of the body 3 into an arbitrary sensor mounting groove 6 and moving it to a desired position,
When the screw member 15 is screwed in, the side surface 6b of the sensor mounting groove 6 is formed.
The nut 13, which has been prevented from rotating, rises relatively, and the screw member 15 whose lower end surface abuts against the bottom surface 6 a of the sensor mounting groove 6 presses the nut 13 against the overhanging portion 16 of the sensor mounting groove 6, and the position detection sensor 7 is fixed to the body 3.

According to the above configuration, when the screw member 15 is screwed in, the screw member 15 is attached to the sensor mounting groove 6 at the tip end surface.
Is directly pressed. Further, the nut 13 presses the projecting portion 16 of the sensor mounting groove 6 by the reaction force. What is pressed is not the position detection sensor 7 but the body 3. Since the sensor case 9 is sandwiched between the engagement portion 18 of the screw member 15 and the bottom surface 6a of the sensor mounting groove 6 with a slight gap 19 therebetween, position detection is performed even if the screw member 15 is screwed more than necessary. The sensor 7 does not break or malfunction. Further, since the position detection sensor 7 is housed in the sensor mounting groove 6, the body 3
It does not protrude out of the way and does not come into contact with other devices and is not damaged. Further, a clear impression can be given to the appearance.

Second embodiment: The engaging portion 18 provided on the screw member 15 is not necessarily formed only by the reduced diameter portion 17, and as shown in FIG. It may be formed by the overhang 20 provided. The overhang 20 shown is formed by mounting an annular component having a rectangular cross section in an annular mounting groove 21 provided on the peripheral surface of the screw member 15. In addition, the engaging portion 1
8 does not necessarily need to be annular, and may protrude from a part of the circumference or may be provided on a part of the circumference.

In the above configuration, the screw member 15 is inserted into the through hole 12 of the sensor case 9 so as to be freely inserted and removed.
Before the position detection sensor 7 is housed in the sensor mounting groove 6, the screw member 15 may fall out of the through hole 12. The screw member 15 and the nut 13 are extremely small parts, and it is necessary to prevent the screw member 15 from dropping out of the through hole 12 in order to prevent loss.

Third Embodiment: For this reason, in the third embodiment, as shown in FIG. 7, the sensor case 9 is provided integrally with a projection 22 projecting radially in the through-hole 12, and On the outer periphery of the reduced diameter portion 17 of the screw member 15, an annular concave portion 23 which can be engaged with the projection 22 is provided. In the figure, the projection 22 is formed in an arc shape in cross section, and the annular concave portion 23 is formed in an arc shape in cross section larger than the projection 22.

In this configuration, when the reduced diameter portion 17 of the screw member 15 is inserted into the through hole 12 of the sensor case 9, the tapered surface 17 a provided on the outer peripheral edge of the distal end of the reduced diameter portion 17 contacts the arc surface of the projection 22. Since the sensor case 9 is made of a synthetic resin having flexibility, when the screw member 15 is further pushed into the through hole 12, the protrusion 22 is gradually formed in the elastic region by the tapered surface 17 a of the reduced diameter portion 17. And engages with the annular recess 23 over the reduced diameter portion 17. Therefore, the engagement between the projection 22 and the annular concave portion 23 can prevent the screw member 15 and the nut 13 screwed to the screw member 15 from falling off the sensor case 9.

Incidentally, between the protrusion 22 and the annular concave portion 23,
Since the screw member 15 is provided with play in the screwing direction such that the distal end surface of the screw member 15 can protrude from the lower surface of the sensor case 9, the screw member 15 is provided with a protrusion 22 on the inner surface of the annular concave portion 23.
Is not pressed. The illustrated protrusions 22 are annular, but need not necessarily be annular, and a single protrusion or a plurality of protrusions that protrude in the radial direction from the circumferential surface may be arranged on the circumference.

Fourth embodiment ... Also, in the fourth embodiment,
As shown in FIG. 8, an annular concave portion 23 is provided on the inner peripheral surface of the through hole 12 of the sensor case 9, and a screw member 15 is provided.
On the outer peripheral surface of the reduced diameter portion 12, a projection 22 engageable with the annular concave portion 23 is integrally provided so as to protrude in the radial direction. In the figure, the projection 22 is formed in an arc shape in cross section, and the annular concave portion 23 is formed in an arc shape in cross section larger than the projection 22.

In this configuration, when the reduced diameter portion 17 of the screw member 15 is inserted into the through hole 12 of the sensor case 9, the projection 22 comes into contact with the tapered surface 12 a provided on the periphery of the upper end opening of the through hole 12 on the circular arc surface. Contact, sensor case 9
Is formed of a synthetic resin having flexibility, when the screw member 15 is further pushed into the through hole 12, the tapered surface 12a is deformed in the elastic region by the arc surface of the projection 22, and the projection 22 is Overcoming the inside of 12,
It engages with the annular recess 23. Therefore, the engagement between the projection 22 and the annular concave portion 23 can prevent the screw member 15 and the nut 13 screwed to the screw member 15 from falling off the sensor case 9.

Incidentally, between the projection 22 and the annular concave portion 23,
Since the screw member 15 is provided with play in the screwing direction such that the distal end surface of the screw member 15 can protrude from the lower surface of the sensor case 9, the screw member 15 does not press the inner surface of the annular concave portion 23 by the protrusion 22. Have been. The illustrated protrusions 22 are annular, but need not necessarily be annular, and a single protrusion or a plurality of protrusions that protrude in the radial direction from the circumferential surface may be arranged on the circumference.

Fifth embodiment ... In the fifth embodiment,
As shown in FIG. 9, the sensor case 9 is integrally provided with a protrusion 22 that protrudes in the radial direction within the through hole 12, and the outer periphery of the screw member 15 is provided with an annular recess 23 that can be engaged with the protrusion 22. ing. In the figure, the projection 22 is formed in an arc shape in cross section, and the annular concave portion 23 is formed in an arc shape in cross section larger than the projection 22.

In this configuration, when the screw member 15 is inserted into the through hole 12 of the sensor case 9, the screw member 15
The tapered surface 15a provided on the outer peripheral edge of the tip
And the sensor case 9 is made of a flexible synthetic resin, so that the screw member 15
Is pushed into the through-hole 12, the projection 22 is gradually deformed in the elastic region by the tapered surface 15 a of the screw member 15, climbs over the distal end of the screw member 15, and the annular recess 23 is formed.
Engages. Therefore, the protrusion 22 and the annular recess 23
The screw member 15 and the screw member 15
Can be prevented from dropping out of the sensor case 9.

Incidentally, between the projection 22 and the annular concave portion 23,
Since the screw member 15 is provided with play in the screwing direction such that the distal end surface of the screw member 15 can protrude from the lower surface of the sensor case 9, the screw member 15 is provided with a protrusion 22 on the inner surface of the annular concave portion 23.
Is not pressed. The illustrated protrusions 22 are annular, but need not necessarily be annular, and a single protrusion or a plurality of protrusions that protrude in the radial direction from the circumferential surface may be arranged on the circumference.

Further, in this embodiment, the upper circular surface (also referred to as a round surface) of the annular concave portion 23 is opposed to the circular surface of the projection 22 with a slight gap 19 in the vertical direction in the figure, and The sensor case 9 is formed between the groove 6 and the bottom surface 6a.
Is an engaging portion 18 that sandwiches the. Therefore, it is not necessary to separately provide the engaging portion 18 and the reduced diameter portion 17 on the screw member 15, so that the sensor mounting mechanism 1 is made compact without complicating the shape of the screw member 15. be able to.

Sixth embodiment ... Also, in the sixth embodiment,
As shown in FIG. 10, an annular concave portion 23 is provided on the inner peripheral surface of the through hole 12 of the sensor case 9, and the screw member 1 is provided.
A protrusion 22 engageable with the annular concave portion 23 is integrally provided on the outer peripheral surface of the fifth so as to protrude in the radial direction. In the figure, the projection 22 is formed in an arc shape in cross section, and the annular concave portion 23 is formed in an arc shape in cross section larger than the projection 22.

In this configuration, when the screw member 15 is inserted into the through hole 12 of the sensor case 9, the projection 22 abuts on a tapered surface 12 a provided on the periphery of the upper end opening of the through hole 12 on its circular arc surface. Is formed of a synthetic resin having flexibility, when the screw member 15 is further pushed into the through hole 12, the tapered surface 12a is deformed in the elastic region by the arc surface of the projection 22, and the projection 22 is 12 and engages with the annular recess 23. Therefore, the engagement between the projection 22 and the annular concave portion 23 can prevent the screw member 15 and the nut 13 screwed to the screw member 15 from falling off the sensor case 9.

Incidentally, between the projection 22 and the annular concave portion 23,
Since the screw member 15 is provided with play in the screwing direction such that the distal end surface of the screw member 15 can protrude from the lower surface of the sensor case 9, the screw member 15 does not press the inner surface of the annular concave portion 23 by the protrusion 22. Have been. The illustrated protrusions 22 are annular, but need not necessarily be annular, and a single protrusion or a plurality of protrusions that protrude in the radial direction from the circumferential surface may be arranged on the circumference.

In this embodiment, the lower (lower half) arc surface (also referred to as a round surface) of the projection 22 is opposed to the arc surface of the annular concave portion 23 in the vertical direction in FIG. The engagement portion 18 sandwiches the sensor case 9 with the bottom surface 6a of the sensor mounting groove 6. Therefore, it is not necessary to separately provide the engaging portion 18 and the reduced diameter portion 17 on the screw member 15, so that the sensor mounting mechanism 1 is made compact without complicating the shape of the screw member 15. be able to.

The sensor mounting mechanism 1 according to the above embodiment can provide the following operational effects.

That is, first, since the position detection sensor 7 is sandwiched between the engagement portion 18 provided on the screw member 15 and the bottom surface 6a of the sensor mounting groove 6 with a slight gap 19 therebetween, the screw member 15 The position detection sensor 7 is not damaged or malfunctions even if the screw is screwed more than necessary.

The position detecting sensor 7 is provided in the sensor mounting groove 6.
Therefore, it does not protrude from the pneumatic equipment main body such as the cylinder 2 and does not interfere with the pneumatic equipment, and does not come into contact with other devices to be damaged. Further, a clear impression can be given to the appearance.

The engagement between the projection 22 and the annular recess 23 prevents the screw member 15 and the nut 13 screwed to the screw member from dropping from the position detection sensor 7 and being lost. it can.

The outer shape of the projection 22 provided on the outer circumferential surface of the screw member 15 or the inner circumferential surface of the annular concave portion 23 is used as the engaging portion 18, so that the shape of the screw member 15 can be simplified. The sensor mounting mechanism 1 can be made compact.

The projection 22 or the annular concave portion 23 is provided on the sensor case 9 made of a synthetic resin having flexibility.
Since the protrusion 22 or the annular concave portion 23 is provided, the manufacturing cost does not increase.

Furthermore, since the screw member 15 can be manufactured by cold forging, metal injection, or the like, the screw member 15 has a relatively complicated shape provided with the engaging portion 18, the projection 22, the annular concave portion 23, and the like. However, the production cost does not increase.

[0044]

The present invention has the following effects.

That is, in the sensor mounting mechanism according to the first aspect of the present invention having the above-described structure, when the screw member is screwed in while the tip of the screw member is in contact with the bottom surface of the sensor mounting groove, Since the female screw member is pressed against the back surface of the projecting portion of the sensor mounting groove instead of the position detection sensor as in the related art, a load due to screwing does not act on the position detection sensor. Therefore, even if the screw member is screwed more strongly than necessary, it is possible to prevent the position detection sensor from being damaged or malfunctioning. In addition, since the screw member is provided with an engagement portion that restricts the position detection sensor from moving away from the bottom surface of the sensor mounting groove when the mounting is completed, the position detection sensor may rattle in the sensor mounting groove. Can be effectively prevented.

Further, the present invention having the above-mentioned structure is characterized in that:
When the screw member is screwed in, the screw is screwed into the position detection sensor instead of the position detection sensor instead of the position detection sensor. There is no. Therefore, even if the screw member is screwed more strongly than necessary, it is possible to prevent the position detection sensor from being damaged or malfunctioning. Also, since the position detection sensor is sandwiched between the engagement portion provided on the screw member and the bottom surface of the sensor mounting groove with a slight gap, it is possible to prevent the position detection sensor from rattling in the sensor mounting groove. It can be effectively prevented.

In addition, in the sensor mounting mechanism according to the third aspect of the present invention having the above-described structure, the sensor mounting mechanism is provided on one of the inner peripheral surface of the through hole of the position detecting sensor and the outer peripheral surface of the screw member. The projection and the annular recess provided on the other are engaged with each other, so that the screw member inserted into the through hole of the position detection sensor before mounting the position detection sensor on the sensor mounting groove, and the screw member It is possible to prevent the screwed nut from dropping from the position detection sensor.

[Brief description of the drawings]

FIG. 1 is a perspective view of an air cylinder provided with a sensor mounting mechanism according to a first embodiment of the present invention.

FIG. 2 is an exploded perspective view of a position detection sensor, a screw member, and a nut according to the embodiment.

FIG. 3 is a plan view of the sensor mounting mechanism according to the embodiment.

FIG. 4 is a sectional view taken along line AA in FIG. 3;

FIG. 5 is an enlarged sectional view taken along line BB in FIG. 4;

FIG. 6 is a cross-sectional view of a sensor mounting mechanism according to a second embodiment of the present invention.

FIG. 7 is a sectional view of a sensor mounting mechanism according to a third embodiment of the present invention.

FIG. 8 is a sectional view of a sensor mounting mechanism according to a fourth embodiment of the present invention.

FIG. 9 is a sectional view of a sensor mounting mechanism according to a fifth embodiment of the present invention.

FIG. 10 is a sectional view of a sensor mounting mechanism according to a sixth embodiment of the present invention.

FIG. 11 is a cross-sectional view of a sensor mounting mechanism according to a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Sensor mounting mechanism 2 Air cylinder (pneumatic device) 3 Body 4 Piping port 5 Rod 6 Sensor mounting groove 6a Bottom surface 6b Side surface 7 Position detection sensor 8 Indicator light 9 Sensor case 10 Lead wire 11 Concave step 12 Through hole 12a, 17a Taper Surface 13 Nut (female screw member) 14 Screw means 15 Screw member 16, 20 Overhang 16a Back surface 17 Reduced diameter portion 18 Engagement portion 19 Clearance 21 Mounting groove 22 Projection 23 Annular concave portion

Claims (3)

[Claims] 1. A sensor mounting mechanism (1) for mounting a position detection sensor (7) in a sensor mounting groove (6) provided on an outer surface of a pneumatic device (2) so as to adjust a fixed position, wherein the sensor mounting groove (6) is provided. A) a pair of overhanging portions (16) provided so as to be opposed to each other along both edges of the opening, and the sensor mounting portion which is inserted into a through hole (12) provided in the position detection sensor (7). The screw member (15) abutting against the bottom surface (6a) of the groove (6) and the screw member (15) are relatively displaced by screwing, and the rear surface (16) of the overhang portion (16) is displaced.
a) a female screw member (13) pressed against a), wherein the position detecting sensor (7) is restricted from moving in a direction away from the bottom surface (6a) of the sensor mounting groove (6) when the mounting is completed. A sensor mounting mechanism in a pneumatic device, wherein a part (18) is provided on the screw member (15). 2. A pneumatic device (2), a sensor mounting groove (6) provided in a longitudinal direction of an outer surface of the pneumatic device (2), and both edges of an opening of the sensor mounting groove (6). A pair of projecting portions (16) projecting opposite to each other, and a through-hole (movably inserted into the sensor mounting groove (6)) opening toward the bottom surface (6a) of the sensor mounting groove (6). 1
A position detection sensor (7) having a through hole (1);
2) and inserted into the bottom surface (6) of the sensor mounting groove (6).
a) a screw member (15) abutting against said screw member (1);
A sensor mounting mechanism (1) in a pneumatic device (2) including a nut (13) screwed into 5), wherein the screw member (15) has a bottom surface (6a) of the sensor mounting groove (6). A sensor mounting mechanism for a pneumatic device, comprising an engaging portion (18) for holding the position detecting sensor (7) with a slight gap (19) therebetween. 3. An annular recess which is provided on one of the inner peripheral surface of the through hole (12) and the outer peripheral surface of the screw member (15), and is engageable with the projection (22) on the other. The sensor mounting mechanism according to claim 2, wherein (23) is provided.