JP3249745B2 - Mounting structure of position detection sensor in hydraulic cylinder and position detection sensor for hydraulic cylinder - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mounting structure of a position detecting sensor in a hydraulic cylinder and a position detecting sensor for the hydraulic cylinder.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 2, some hydraulic cylinders have a mounting groove 3 for fixing a position detection switch for detecting the position of the piston. The mounting groove 3 is formed so as to extend in the axial direction of the fluid pressure cylinder 1, and an engagement rail 4 is also provided along the opening end in the axial direction. By using the mounting groove 3, the position detection switch can be fixed at an arbitrary position in the axial direction of the fluid pressure cylinder 1.

FIG. 12 shows a position detecting switch 30 fixed to such a mounting groove 3. The housing 30 a of the position detection switch 30 is provided with a pair of engagement grooves 31 that can be engaged with the engagement rail 4. The position detection switch 30 is supported movably only in the axial direction with respect to the fluid pressure cylinder 1 by engaging the two engagement grooves 31 with the engagement rails 4.

Further, the position detecting switch 30 includes a lower mounting piece 32 accommodated in the mounting groove 3 when the position detecting switch 30 is supported by the mounting groove 3, and an upper part of the mounting groove 3. And the upper mounting piece 33 disposed in the vertical direction. This upper mounting piece 3
3 is provided with an insertion hole 36 for inserting the head 35 of the fixing bolt 34, and the lower mounting piece 32 is provided with a relief hole 38 for releasing the tip of the screw portion 37 of the fixing bolt 34. I have.

[0005] The position detection switch 30 includes two mounting pieces 32,
A pair of holding plates 39 and 40 are provided between the holding plates 33, and the holding plates 39 and 40 are fastened by fixing bolts 34 inserted through the insertion holes 36. That is, the holding plates 39 and 40 include an upper holding plate 39 having a hole 41 through which the screw portion 37 of the fixing bolt 34 is inserted.
And a lower holding plate 40 having a female screw hole 42 with which the screw portion 37 is screwed. Then, as shown in FIG. 13, the upper holding plate 39 is disposed above the mounting groove 3 in a state where the position detection switch 30 is supported by the mounting groove 3, and the lower holding plate 40 is also inside the mounting groove 3. To be housed.

In order to fix the position detecting switch 30, the screw portion 37 of the fixing bolt 34 is inserted through the hole 41 of the upper holding member 39 from the insertion hole 36 of the upper mounting piece 33, and the female screw hole 42 of the lower holding member 40 is inserted. Screw. Then, since the engagement rail 4 is sandwiched between the sandwiching plates 39 and 40,
The holding plates 39 and 40 and the fixing bolt 34 are fixed at predetermined positions of the mounting groove 3. At this time, since the head 35 of the fixing bolt 34 is inserted into the insertion hole 36 of the upper attachment piece 33, the movement of the position detection switch 30 in the axial direction is restricted. Therefore, the position detection switch 30 is fixed at a desired position of the mounting groove 3.

According to the mounting structure of the position detecting switch 30, the two holding plates 3 supported movably in the vertical direction with respect to the upper mounting piece 33 and the lower mounting piece 32.
Since the engagement rails 4 are sandwiched between 9 and 40, the engagement rails 4 are not deformed even if the fixing bolts 34 are strongly tightened. Therefore, it is not difficult to change the mounting position of the position detection switch 30. In addition, since no stress is applied to the position detection switch 30 by tightening the fixing bolt 34, the switch function is not impaired.

[0008]

However, since the head 35 of the fixing bolt 34 to be inserted into the insertion hole of the upper mounting piece 33 is formed by forging, the outer diameter of the head 35 is set to 0.3 mm. There is variation on the order of 1 mm (unit). On the other hand, since the insertion hole 36 is integrally formed with the housing 30a by molding, the variation in the inner diameter of the insertion hole 36 is as small as 0.01 mm (unit). Therefore, the inner diameter of the insertion hole 36 of the upper mounting piece 33 is set to be equal to or larger than the maximum diameter of the variation range of the head 35. For example, a fixing bolt 34 having a nominal diameter of M3 (the outer diameter of the screw portion 37 is 3 mm).
Since the outer diameter of the head 35 varies in the range of 5.32 to 5.68 mm, the reference dimension of the inner diameter of the insertion hole 36 is, for example, 5.70 mm.

Therefore, when the outer diameter of the head 35 of the fixing bolt 34 actually used is small, the insertion hole 3
The difference between the inner diameter of 6 and the outer diameter of the head 35 increases. For example, if the outer diameter of the head 35 is 5.32 mm, the difference is 0.3 mm.
It becomes 38 mm or more.

As a result, the position detection switch 30 can be moved by 0.38 mm or more in the length direction of the mounting groove 3 with respect to the fixing bolt 34 fixed to the mounting groove 3, so that the mounting position accuracy is deteriorated. Therefore, there is a problem that the detection accuracy of the position detection switch 30 is deteriorated.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide a hydraulic cylinder capable of securely fixing a mounting groove and a position detecting sensor without damaging the mounting groove and a position detecting sensor. And a position detection sensor for a fluid pressure cylinder.

[0012]

According to a first aspect of the present invention, a fluid pressure cylinder is provided with a mounting groove extending in an axial direction of the hydraulic cylinder, and the mounting groove is provided in the mounting groove in the axial direction. A position detection sensor that movably engages and detects the piston position of the fluid pressure cylinder at a position fixed in advance is provided with opposed insertion holes in the mounting groove, and a screw inserted through the insertion hole is provided. By fixing the fixing member to the mounting groove by the fastening means, position detection in the fluid pressure cylinder in which the position detection sensor is fixed to the mounting groove via the insertion hole by the screwing means In the sensor mounting structure, between the insertion hole and the screw-fastening means, the screw-fastening means is deformed by being inserted into the insertion hole, so that the screw-fastening means is deformed by the same insertion hole. The mounting groove extends A support member for immovably supporting the direction provided, the threaded fastening means comprises a threaded portion and a head the head
Part is inserted into the insertion hole and engages with the support member.
The gist is that it becomes immovable due to .

According to a second aspect of the present invention, in the first aspect, the support member is formed integrally with the insertion hole. According to a third aspect of the present invention, in the second aspect of the present invention, a guide member is provided adjacent to the support member for guiding the screw fastening means to a position where the support member is deformed.

According to a fourth aspect of the present invention, in the second aspect, a plurality of the support members are provided at equal angular intervals in a circumferential direction on an inner peripheral surface of the insertion hole and extend in a vertical direction. The support piece formed as described above.

According to a fifth aspect of the present invention, there is provided an engaging portion which is movably engaged only in a coaxial direction with a mounting groove provided in a fluid pressure cylinder so as to extend in the axial direction, and the engaging portion. Are engaged with the mounting groove, the insertion hole faces the mounting groove, screw fastening means inserted into the insertion hole, and a fixing member fixed to the mounting groove by the screw fastening means. In the position detecting sensor for a hydraulic pressure cylinder having the above, between the insertion hole and the screwing fastening means, the screwing fastening means is deformed by being inserted through the insertion hole, so that the screwing fastening is performed. a support member for immovably supporting the insertion hole in a direction extending said mounting groove provided for means, said
The screw fastening means comprises a screw portion and a head, and the head is provided with the insertion portion.
The transfer is performed by being inserted into the through hole and engaging with the support member.
The gist is that you will not be able to move .

Therefore, according to the first and fifth aspects of the present invention, the position detecting sensor is supported movably only in the axial direction with respect to the mounting groove formed in the fluid pressure cylinder so as to extend in the axial direction. You. In this state, when the fixing member is fixed to the mounting groove by the screw fastening means inserted through the insertion hole opposite to the mounting groove, the position is detected through the insertion hole by the screw fastening means fixed together with the fixing member. The sensor is fixed in the mounting groove. At this time, between the insertion hole and the screwing fastening means, the screwing fastening means is deformed by being inserted through the insertion hole, so that the mounting groove extends in the insertion hole with respect to the screwing fastening means. Since the support member is provided so as to be immovable, the insertion hole moves in the axial direction with respect to the screw fastening means fixed together with the fixing member in the mounting groove even if the dimensions of the screw fastening means or the insertion hole vary. No longer.

According to the invention described in claim 2, according to claim 1
In the invention described in (1), since the support member is formed integrally with the insertion hole, it is not necessary to provide the support member as a new member.

According to the invention described in claim 3, according to claim 2,
In the invention described in (1), the screw fastening means is guided to a position where the support member is deformed by a guide member provided adjacent to the support member. Therefore, the support member can be deformed substantially uniformly.

According to the invention described in claim 4, according to claim 2,
In the invention described in the above, the support member is provided at equal angular intervals in the circumferential direction on the inner peripheral surface of the insertion hole, and is made of a support piece formed to extend in the vertical direction, so that the screwing fastening means is inserted. As it goes, each support piece is easily deformed.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS. FIG. 2 shows a state in which a position detection switch 2 for detecting the position of a piston P is mounted on an air cylinder 1 as a fluid pressure cylinder. The air cylinder 1 is provided with a mounting groove 3 extending in the axial direction. As shown in FIG. 7, the mounting groove 3 is formed in a rectangular shape in cross section, and engagement rails 4 are provided along both sides of the opening. The position detection switch 2 is fixed at an arbitrary position in the axial direction of the fluid pressure cylinder 1 by using the mounting groove 3.

FIG. 1 shows a state where a position detection switch 2 as a position detection sensor is disassembled. The position detection switch 2 includes a switch body 5, an upper holding plate 6, a lower holding plate 7, and a fixing bolt 8.

The switch body 5 has a housing 9 made of engineering plastic such as PBT and ABS. A sensor element (not shown) such as a reed switch is accommodated in the housing 9. On the outside of the housing 9, an engagement groove 1 as an engagement portion for engaging the engagement rail 4 on both sides thereof.
0 is formed. When each engagement groove 10 is engaged with the engagement rail 4, the position detection switch 2
Are movably supported on the hydraulic cylinder 1 only in the axial direction thereof.

An upper mounting piece 11 and a lower mounting piece 12 are integrally formed at one end of the housing 9 so as to be vertically opposed to each other. The upper mounting piece 11 is provided with an insertion hole 14 through which the head 13 of the fixing bolt (a bolt with a hexagonal hole in this embodiment) 8 as a screw fastening means can be inserted. As shown in FIGS. 3 and 4, the insertion hole 14 is provided with four support pieces 15 as support members extending in the vertical direction at equal angular intervals in the circumferential direction on the inner peripheral surface thereof. . Each of the support pieces 15 is formed integrally with the insertion hole 14, that is, the housing 9.

Each support piece 15 is formed to extend from a position slightly below the upper end of the insertion hole 14 to the lower end of the insertion hole 14. Each support piece 15 is formed on a slope 15a such that the inner peripheral surface of the upper portion thereof approaches the center axis side of the insertion hole 14 as it goes downward. Therefore, each support piece 1
The inner diameter of the virtual circle formed by the fifth slope 15a becomes smaller as it goes downward. As shown in FIG. 4, when the fixing bolt 8 is inserted from above into the insertion hole 14, each slope 15 a comes into contact with the lower peripheral edge of the head 13 and fixes the fixing bolt 8 to each support piece. Guide to the center of 15. In the present embodiment, a guide member is formed by each slope 15a.

The lower mounting piece 12 is provided with an escape hole 16 for allowing the screw portion 8a of the fixing bolt 8 to escape. As shown in FIG. 7, when the position detection switch 2 is mounted in the mounting groove 3, the upper mounting piece 11
Is disposed so as to face the mounting groove 3 above the
The lower mounting piece 12 is accommodated in the mounting groove 3.

The upper holding plate 6 and the lower holding plate 7 as fixing members are disposed between the two mounting pieces 11 and 12. The upper holding plate 6 has a hole 17 through which the screw portion 8a of the fixing bolt 8 can be inserted. Also, the lower holding plate 6
The lower surface is provided with a pair of step surfaces 6a that engage with the mounting grooves 3. On the other hand, the lower holding plate 7 has a female screw hole 18 into which the screw portion 8a can be screwed. Also, the lower holding plate 7
Is provided with a stepped surface 7a which engages with the mounting groove 3 on its lower surface. When the position detection switch 2 is mounted in the mounting groove 3, the upper holding plate 6 is disposed below the upper mounting piece 11 and above the mounting groove 3, as shown in FIG.
The lower holding plate 7 is arranged inside the mounting groove 3 above the lower mounting piece 12.

Next, the operation of the mounting structure of the position detection switch in the hydraulic cylinder configured as described above will be described. Before mounting the position detection switch 2 on the air cylinder 1, first, the fixing screw 8 is inserted through the insertion hole 14 of the upper mounting piece 11, and the screw portion 8 a is inserted into the hole 17 of the upper holding plate 6.
After that, the screw is slightly screwed into the female screw hole 18 of the lower holding plate 7. The position detection switch 2 in this state is engaged with the engagement groove 3 and moved to a predetermined position.

At this time, as shown in FIG. 5, the fixing bolt 8 is formed so that the lower end peripheral edge of the head 13 is formed on the slope 15 a of the support piece 15.
Abut. The upper holding plate 6 has its step surface 6 a engaged with the mounting groove 3. When the fixing screw 8 is rotated in this state, the screw portion 8a is screwed into the female screw hole 18 of the lower holding plate 7, so that the lower holding plate 7 moves upward and the stepped surface 7a is engaged with the engaging rail. 4 abuts on the lower surface 4a. Then
Since the upward movement of the lower holding plate 7 is restricted, the fixing screw 8 moves downward while shaving the inner peripheral side of each support piece 15. At this time, since each slope 15a comes into contact with the peripheral edge of the lower surface of the fixing screw 8, the fixing bolt 8 is guided to the center of each supporting piece 15, so that each supporting piece 15 is cut substantially evenly.
Further, since each support piece 15 is formed in a plate shape, it can be easily shaved by the fixing bolt 8.

When the fixing screw 8 moves further downward, the lower surface 13a of the head 13 comes into contact with the upper surface 6a of the upper holding plate 6. Then, the upper holding plate 6 and the two engaging rails 4 are held between the lower surface 13a of the head 13 and the upper surface 7a of the lower holding plate 7. Therefore, the holding plates 6 and 7 and the fixing bolt 8 are fixed at predetermined positions of the mounting groove 3. At this time, since the inner peripheral surface of each support piece 15 comes into contact with the outer peripheral surface 13b of the head 13 of the fixing bolt 8, the head 13 is inserted into the insertion hole 14 as shown in FIG. It is supported so that it cannot move relatively in the axial direction. Therefore, even if the outer diameter of the head 13 of the fixing bolt 8 varies, the head 13 and the insertion hole 14 do not relatively move in the length direction of the mounting groove 3 (that is, in the axial direction of the air cylinder 1). It is supported by each support piece 15. for that reason,
The two holding plates 6 and 7 fixed to the mounting groove 3 and the fixing bolt 8
, The switch body 5 is securely fixed at a predetermined position of the mounting groove 3.

As described in detail above, according to the mounting structure of the detection switch in the fluid pressure cylinder of the present embodiment,
The following effects can be obtained. (A) A support piece 15 is provided on the inner peripheral surface of the insertion hole 14 of the upper mounting piece 11 through which the fixing bolt 8 is inserted, and the support piece 15
Is deformed by inserting the head 13 of the fixing bolt 8 so that the head 13 is immovably supported in the insertion hole 14 in the axial direction of the air cylinder 1. Accordingly, the axial movement of the position detection switch 2 provided with the insertion hole 14 is restricted with respect to the head 13 of the fixing bolt 8 fixed together with the holding plates 6 and 7 in the mounting groove 3 of the air cylinder 1. . As a result, even if the outer diameter of the head 13 of the fixing bolt 8 varies, no gap is formed between the head 13 and the insertion hole 14, so that the insertion hole 14 moves in the axial direction with respect to the head 13. No longer. Therefore, since the position detection switch 2 can be securely fixed to a predetermined position of the mounting groove 3, it can be positioned with high accuracy.

(B) Since each support piece 15 is formed integrally with the insertion hole 14, there is no need to provide each support piece 15 as a new member. (C) A slope 15a is formed on the upper side of each support piece 15 so as to be closer to the center axis side as it goes downward, and the head 13 of the fixing bolt 8 inserted into the insertion hole 14 is guided by each slope 15a. Each support member 15 was cut. Therefore,
Since each support member 15 can be evenly cut, the fixing bolt 8 can be easily attached.

(D) The support member is a support piece 15 formed to extend vertically at equal angular intervals in the circumferential direction on the inner peripheral surface of the insertion hole 14. Therefore, the fixing bolt 8
Since the support pieces 15 can be easily shaved, the fixing bolts 8 can be easily attached.

It should be noted that the present invention is not limited to the above-described embodiment, but can be configured as follows. (1) As shown in FIG. 8, the support member may be configured by a tapered portion 20 formed such that the inner diameter becomes smaller as it goes below the insertion hole 14. In this case, as shown in FIG. 9, when the fixing bolt 8 moves downward, the lower part of the tapered portion 20 is shaved by the head 13, and the shaved lower part causes the head 13 to be inserted into the insertion hole 14. It is supported immovably in the axial direction inside. At this time, since the fixing bolt 8 is guided to the center of the tapered portion 20 at the upper portion of the tapered portion 20, the lower portion is evenly cut. Therefore, since the lower part can be easily shaved, the fixing bolt 8 can be easily attached.

(2) The support member may be formed separately from the switch body 5. For example, as shown in FIG.
An annular support member 21 made of synthetic resin is used. The support member 21 is formed in a lid shape as a whole, and has a hole 22 in the center thereof for inserting the screw portion 8a. A plurality of support pieces 24 are provided on the outer peripheral surface 23 at equal angular intervals in the circumferential direction. Each support piece 24 is formed on a slope 24a whose outer peripheral surface is closer to the center axis as it goes downward. As shown in FIG. 11, the support member 21 allows the threaded portion 8a of the fixing bolt 8 to pass through the hole 22 and fits the head 13 from below. Then, the outer peripheral side of each support piece 24 is cut by the insertion hole 14 by being inserted into the cylindrical insertion hole 14 together with the fixing bolt 8. When the fixing bolt 8 is lowered to a state where the fixing bolt 8 comes into contact with the upper surface 6a of the upper holding plate 6, the fixing bolt 8 is supported immovably in the length direction of the mounting groove 3 in the insertion hole 14 together with the support member 21. With this configuration as well, the position detection switch 2 can be securely fixed without damaging the engagement rail 4 and the switch body 5.

(3) The head 13 of the fixing bolt 8 is supported in the insertion hole 14 and the screw portion 8a is accommodated without contact with the escape hole 16.
May be supported in the escape hole 16 so as to be immovable in the axial direction, and the head 13 may be accommodated in the insertion hole 14 without contact. That is, for example, the escape hole 16
A plurality of support pieces 15 as in the above-described embodiment are formed on the inner peripheral surface of the hole, and the screw portion 8a is deformed by being inserted into the escape hole 16 so that the screw portion 8a is It is configured to be immovably supported.

(4) Instead of cutting the inner peripheral side of each support piece 15 by inserting the fixing bolt 8 into the insertion hole 14 to support the head 13, the head 13 is supported by plastic deformation. You may do so. in this case,
Since the deformation of each support piece 15 is a plastic deformation, the deformation does not deform the upper mounting piece 11 to apply stress to the switch body 5.

(5) Each support piece 15 may be provided with no slope 15a as a guide member. Even in this case, each support piece 15 can be deformed by inserting the fixing bolt 8, and the fixing bolt 8 can be supported in the insertion hole 14.

(6) The housing 9 is formed of a metal material such as an aluminum alloy instead of plastic, and
5 may be integrally formed of the metal material. Even in this case, the fixing bolt 8 can be supported in the insertion hole 14 by shaving each support piece 15 with the fixing bolt 8.

(7) Instead of the hexagon socket head bolt, another bolt, for example, a hexagon bolt or a square bolt may be used. In this case, the insertion hole 1
Support 4 Also, a configuration using screws instead of bolts may be used.

(8) In place of the position detection switch 2 for outputting an on / off signal, this method is carried out when a position detection sensor such as a magnetoresistive element for outputting an analog signal corresponding to the distance to the piston P to be detected is attached. You may.

The technical ideas other than the claims which can be grasped from the embodiment will be described below together with their effects. (1) The position detection sensor for a fluid pressure cylinder according to claim 5 is a magnetic proximity sensor. According to such a configuration, the magnetic proximity sensor can be securely fixed to the fluid pressure cylinder.

(2) A hydraulic cylinder provided with the hydraulic cylinder position detecting sensor according to claim 5. According to such a configuration, the mounting position can be easily changed,
In addition, a fluid pressure cylinder having a position detection sensor that performs position detection with high detection accuracy can be provided.

[0043]

As described in detail above, according to the first and fifth aspects of the present invention, the mounting groove of the fluid pressure cylinder and the detection sensor can be securely fixed without damage.

According to the second aspect of the present invention, the first aspect is provided.
In addition to the effects of the invention described in (1), the present invention can be realized without increasing new members. According to the third aspect of the invention, in addition to the effect of the second aspect, the support member can be stably deformed, so that the screw fastening means can be easily attached.

According to the invention described in claim 4, according to claim 2
In addition to the effects of the invention described in (1), since the support member can be easily deformed, the screw fastening means can be easily attached.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a position detection switch.

FIG. 2 is a front view of an air cylinder to which a position detection switch is attached.

FIG. 3 is a plan view showing an insertion hole.

FIG. 4 is a sectional view of an insertion hole and an escape hole.

FIG. 5 is a sectional view of an insertion hole.

FIG. 6 is a plan view of an insertion hole in which a fixing bolt is inserted.

FIG. 7 is a sectional view of the position detection switch fixed to the mounting groove.

FIG. 8 is a perspective view showing another attachment structure.

FIG. 9 is a sectional view of the position detection switch fixed to the mounting groove.

FIG. 10 is a perspective view of another example of a support member.

FIG. 11 is a sectional view showing a mounting state of a fixing bolt.

FIG. 12 is a perspective view showing a conventional position detection switch.

FIG. 13 is a cross-sectional view of the position detection switch fixed to the mounting groove.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Air cylinder as a fluid pressure cylinder, 2 ... Position detection switch as a position detection sensor, 3 ... Mounting groove, 6 ...
Upper holding plate as a fixing member, 7. Similarly lower holding plate,
8: fixing bolts as screw fastening means, 10: engagement grooves as engagement portions, 14: insertion holes, 15: support pieces as support members, 15a: slopes as guide members.

Continuation of the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) G01D 11/30 F15B 15/28 G01B 21/00 G01D 5/12 G12B 9/08

Claims (5)

(57) [Claims] The fluid pressure cylinder (1) is provided with a mounting groove (3) extending in the axial direction thereof, and is engaged with the mounting groove (3) movably only in the axial direction and fixed in advance. A position detection sensor (2) for detecting a piston position of the fluid pressure cylinder (1) at a position is provided with an insertion hole (14) opposed to the mounting groove (3), and inserted into the insertion hole (14). By fixing the fixing members (6, 7) to the mounting grooves (3) by the screwed fastening means (8), the insertion holes (1) are fixed by the screwed fastening means (8).
4) A mounting structure for a position detection sensor in a fluid pressure cylinder, wherein the position detection sensor (2) is fixed to the mounting groove (3) via the mounting hole (14). 8), the screwing and fastening means (8) is deformed by being inserted through the insertion hole (14), so that the insertion hole (14) is inserted into the screwing and fastening means (8). the mounting groove (3) provided with a support member (15) for immovably supported in the direction in which extends, said screw
The fastening means (8) comprises a screw part and a head, and the head is
The support member (15) is inserted through the insertion hole (14) and
A mounting structure for a position detection sensor in a hydraulic cylinder which becomes immovable when engaged. 2. The mounting structure for a position detection sensor in a hydraulic cylinder according to claim 1, wherein the support member (15) is formed integrally with the insertion hole (14). 3. A guide member (15a) for guiding the screw fastening means (8) to a position where the support member (15) is deformed is provided adjacent to the support member (15).
The mounting structure of the position detection sensor in the fluid pressure cylinder described in 1 above. 4. A plurality of support members (15) provided at equal angular intervals in the circumferential direction on the inner peripheral surface of the insertion hole (14), and formed to extend vertically. The mounting structure of the position detection sensor in the hydraulic cylinder according to claim 2, wherein: 5. An engaging portion (10) which is movably engaged only in a coaxial direction with a mounting groove (3) provided in the fluid pressure cylinder (1) so as to extend in the axial direction thereof; An insertion hole (14) opposed to the mounting groove (3) in a state where the mating portion (10) is engaged with the mounting groove (3), and a screw fastening means inserted into the insertion hole (14). 8)
And a fixing member (6, 7) fixed to the mounting groove (3) by the screw fastening means (8). Between the screw fastening means (8), the screw fastening means (8) is deformed by being inserted through the insertion hole (14), so that the screw fastening means (8) is inserted through the screw fastening means (8). hole (14) the mounting groove (3) support member for immovably supported in the direction in which the extending (15) is provided, said screw
The fastening means (8) comprises a screw part and a head, and the head is
The support member (15) is inserted through the insertion hole (14) and
A position detection sensor for a hydraulic cylinder that becomes immovable when engaged.