TW201804090A - Fluid pressure cylinder device provided with stroke end detecting function - Google Patents

Abstract

To provide a fluid pressure cylinder device provided with a stroke end detecting function with high durability and reliability. In a hydraulic cylinder device provided with a stroke end detecting function, a stroke end detecting means includes an insertion hole formed at a piston member and having a predetermined length, a mounting hole formed in a center part of a head side end wall, a mechanism chamber forming body having a fitting shaft portion fitted in the mounting hole, a first pipe of a non-magnetic material inserted through the fitting shaft portion to extend into the insertion hole to the proximity of the innermost end thereof, a second pipe of a non-magnetic material inserted through the fitting shaft portion to extend into the base end of the insertion hole, first and second reed switches and first and second harnesses mounted in the vicinities of the tip ends of the first and second pipes respectively, first and second resin sealing members filled in the first and second pipes respectively, and an annular permanent magnet mounted on the outer peripheral side of the base end of the insertion hole to face the insertion hole.

Description

Fluid pressure cylinder device with function of detecting stroke end

The present invention relates to a fluid pressure cylinder device having a function of detecting stroke end.

Various fluid pressure cylinder devices having a stroke end detection function for detecting forward stroke end and backward stroke end of a piston member have been put into practical use. In particular, in a hydraulic cylinder for driving a core mold in a die casting machine or an injection molding machine, a cylinder body is often equipped with an assembly stroke end detection means.

In the cylinder device with a stroke end detection function described in Patent Document 1, an insertion hole extending from the cylinder head side end face into the piston rod is formed in the center of the piston member, and the fitting portion of the mechanism chamber forming member is formed by It is screwed and fixed to the installation hole in the center of the cylinder head side end wall of the cylinder body, and a protective tube of a non-magnetic system is inserted into the insertion hole, and its base end portion is fixed to the mechanism chamber forming member.

The first and second tube bodies of two non-magnetic systems are inserted into the protective tube, and the base ends of the first and second tube bodies are held in the mechanism chamber forming member, and the first and second tube bodies are supported as cantilevers. status. The first tube body is provided with a first reed switch for detecting the forward stroke terminal and a first wiring harness connected to the switch, and the second tube body is provided with a second reed switch for detecting the backward stroke terminal and connected to the first 2nd harness for switch.

Since the first and second tube bodies are very small-diameter components, no resin sealing material is sealed in the first and second tube bodies.

A ring-shaped permanent magnet for turning ON and OFF the first and second reed switch rows is mounted on the outer peripheral side of the base end of the insertion hole. In addition, first and second position adjustment mechanisms capable of adjusting positions in the axial center direction of the first and second pipe bodies, respectively, are incorporated in the mechanism chamber forming member.

Prior art literature Patent literature

[Patent Document 1] Japanese Patent No. 3280345

In the cylinder device with a stroke end detection function disclosed in Patent Document 1, a protective tube is inserted into the insertion hole of the piston member, and the protective tube is inserted into the first and second tube bodies. Therefore, the caliber has to be adopted. A very small and thin pipe body is used as the first and second pipe bodies.

Therefore, the first and second reed switches and the first and second wire harnesses cannot be enclosed in the first and second tubes with resin. Therefore, the rigidity of the first and second pipe bodies is low. When a large impact is repeatedly applied to the cylinder device, the first and second pipe bodies are easy to vibrate, and the first and second wire harnesses are connected to the first and second wire harnesses. 1. The connection part of the second reed switch is disconnected, or the position of the first and second reed switches is changed, which reduces the detection accuracy of the stroke end.

An object of the present invention is to provide a fluid pressure cylinder device having a function of detecting a stroke end, which has durability and excellent reliability.

The fluid pressure cylinder device with the function of detecting the stroke end in the first scope of the patent application has: a cylinder body; a piston member, which is installed in the cylinder The main body's piston and piston rod; and stroke end detection means, which detect the forward stroke end and backward stroke end of the piston member, are characterized by having an insertion hole of a predetermined length and penetrating the piston from the end face of the cylinder head to the The piston rod is extended in the piston member, and a mounting hole is formed in the central portion of the cylinder head side end wall of the cylinder body, and the stroke end detection means includes: a mechanism chamber forming body, which has an insert. The fitting shaft part fits into the installation hole; the first tube body of the non-magnetic system, the base end part supports the formation body of the mechanism chamber, and the fitting shaft part is penetrated and directly inserted into the insertion hole, and extends deep It is located near the rear end and is placed in the fluid in the insertion hole; the second tube body of the non-magnetic system supports the base end portion in the mechanism chamber forming body, and penetrates the fitting shaft portion and directly inserts the fitting shaft portion. Inserted in the hole and extending to the base end of the insertion hole, and arranged in the fluid in the insertion hole; the first and second reed switches are respectively installed at the front ends of the first and second pipe bodies Nearby Inside; the first and second wiring harnesses are respectively extended from the first and second reed switches to the base end side in the first and second tube bodies; the first and second resin closing members are respectively filled in the first 1. Inside the second tube body and closing the first and second reed switches and the first and second wiring harnesses; and a ring-shaped permanent magnet, which is installed at the base end of the insertion hole so as to face the insertion hole. Department peripheral side.

The fluid pressure cylinder device with the function of detecting the stroke end in the second scope of the patent application is the invention in the first scope of the patent application, in which the first and second pipe systems respectively pass through the fitting shaft in a forward and backward manner. And extend to the inside of the inside of the above-mentioned institution room forming body; and the above-mentioned institution room is provided with the axes of the first and second pipe bodies that can be adjusted by operation of the first and second operating members operated from the outside, respectively. First and second position adjustment mechanisms for positions in the heart direction.

Equipped with the function of detecting stroke terminal in the scope of patent application No. 3 The fluid pressure cylinder device belongs to the second invention in the scope of patent application. The first and second position adjustment mechanisms include: a first and a second movable member, which are respectively fixed in the first and second positions in the mechanism room. 2 the base end portion of the pipe body; the first and second screw holes are respectively formed in the first and second movable members and are parallel to the axial direction of the first and second movable members; and the first and second The screw shaft is integrally formed with the first and second operating members and is screwed into the first and second screw holes, respectively.

The fluid pressure cylinder device with the function of detecting stroke end in item 4 of the scope of the patent application is the invention in item 1 of the scope of the patent application, which is provided with the first and the first blocks respectively blocking the front ends of the first and second pipe bodies. 2 block members.

According to the invention according to the first item of the patent application scope, since the first and second pipe bodies are directly inserted into the insertion holes formed in the piston member, the diameters of the first and second pipe bodies can be increased.

Therefore, the first and second resin sealing members may be filled inside the first and second pipe bodies, respectively, and the first and second reed switches and the first and second wire harnesses may be sealed with resin.

As a result, the rigidity of the first and second tube bodies is improved, the first and second tube bodies are less prone to vibration, the vibration resistance of the first and second reed switches is stronger, and the first and second reed switches and the first and second reed switches are stronger. 1. The connection part of the second wire harness is unlikely to be disconnected. The position variation of the first and second reed switches is also small, and the accuracy of the stroke end detection can be improved. Therefore, it is possible to realize a fluid pressure cylinder device having a stroke end detection function having durability and excellent reliability. Moreover, since the protective tube used in the conventional technology is omitted, the manufacturing cost can be reduced.

If the invention according to item 2 of the scope of patent application is provided with the first and second position adjustment mechanisms, the position in the axial direction of the first and second pipe bodies can be increased. To adjust.

According to the invention in item 3 of the scope of patent application, the simple first and second position adjustment mechanisms can be realized.

According to the invention in item 4 of the scope of patent application, since the first and second blocking members are provided to block the front ends of the first and second pipe bodies, respectively, the fluid pressure moves from the front ends of the first and second pipe bodies to the first and second pipe bodies. 2 Penetration into the tube can be prevented.

1‧‧‧Hydraulic cylinder device with end-of-stroke detection function

2‧‧‧Hydraulic cylinder

3‧‧‧ cylinder body

3a‧‧‧ cylindrical wall

3b‧‧‧ cylinder head side end wall

4‧‧‧Piston components

4a‧‧‧Piston

4b‧‧‧Piston rod

6‧‧‧ cylinder bore

7‧‧‧ Bolt

8‧‧‧Piston rod side end wall member

8a‧‧‧fit convex part

8b‧‧‧burst

8c‧‧‧Piston rod hole

9‧‧‧sealing member

10‧‧‧Outbound Oil Room

11‧‧‧Back trip oil room

12‧‧‧sealing member

13‧‧‧sealing member

14‧‧‧ dustproof seal

15‧‧‧Hydraulic port

15a‧‧‧oil road

16‧‧‧Hydraulic port

16a‧‧‧oil road

20‧‧‧Travel terminal detection means

21‧‧‧ insertion hole

22‧‧‧ installation holes

23‧‧‧ Institution Room Formation

24, 25‧‧‧ first, second tube

26, 27‧‧‧ The first and second reed switches

26a, 27a‧‧‧ first, second harness

29, 30‧‧‧ 1st and 2nd resin sealing members

31‧‧‧Ring permanent magnet

32, 33‧‧‧ 1st, 2nd position adjustment mechanism

32a, 33a‧‧‧ first, second movable member

32c, 33c‧‧‧ first, second screw holes

32d, 33d‧‧‧1st, 2nd screw shaft

32n, 33n‧‧‧Locking nut

32s, 33s‧‧‧The first and second operating members

34, 35‧‧‧ First, second blocking members

36‧‧‧ base member

36a‧‧‧fit shaft

36b‧‧‧burst

37‧‧‧ cover member

37a‧‧‧ Engagement tube

37b‧‧‧burst

38‧‧‧ Agency Room

39‧‧‧pin member

40‧‧‧ Bolt

41‧‧‧through hole

42‧‧‧through hole

43‧‧‧ ring member

44‧‧‧Fixed components

44a‧‧‧screw hole

45, 46‧‧‧O-ring

47‧‧‧ circular pusher

48‧‧‧ snap ring

49‧‧‧harness connector

50‧‧‧Connecting metal parts

51‧‧‧cable

FIG. 1 is a cross-sectional view of a hydraulic cylinder device having a stroke end detection function according to an embodiment of the present invention.

Fig. 2 is an enlarged view of an important part of the hydraulic cylinder device of Fig. 1.

FIG. 3 is a side view seen from arrow A in FIG. 1.

Fig. 4 is a side view seen from arrow B in Fig. 1.

[Embodiment of Invention]

An embodiment of the present invention will be described with reference to FIGS. 1 to 3.

This embodiment is an example when a hydraulic cylinder is used as the fluid pressure cylinder. In the following description, "hydraulic pressure" does not refer to the pressure of oil, but means to represent compressed oil. In addition, the arrow L in FIG. 1 indicates the left side, and the arrow R indicates the right side.

This hydraulic cylinder device 1 is a cylinder device having a function of detecting a stroke end. The reciprocating hydraulic cylinder 2 is provided with a stroke end detecting means 20 for detecting a forward stroke end and a backward stroke end of a piston member.

First, the hydraulic cylinder 2 will be described.

The hydraulic cylinder 2 includes a cylinder body 3 and a piston mechanism mounted on the cylinder body 3. Piece 4.

A cylinder hole 6 is formed inside the cylinder body 3. The cylinder body 3 includes a cylindrical wall portion 3a, a piston rod-side end wall member 8 fixed to the end of the cylindrical wall portion 3a with two bolts 7, and a cylinder head-side end wall integrally formed with the cylindrical wall portion 3a. 3b.

The piston member 4 is integrally formed by a piston 4a and a piston rod 4b. The piston 4a is movably received in the cylinder bore 6, and the piston rod 4b extends from the end of the piston 4a to the left. A sealing member 9 is attached to the outer peripheral portion of the piston 4a. In the cylinder bore 6, a return oil chamber 10 is formed on the right side of the piston 4a, and a return oil chamber 11 is formed on the left side of the piston 4a.

The piston rod-side end wall member 8 includes a fitting convex portion 8a fitted into the left end portion of the cylindrical wall portion 3a, and a flange portion 8b that abuts the left end surface of the cylindrical wall portion 3a.

In addition, the four bolt holes 5 are bolt holes for mounting the hydraulic cylinder 2 to a member on the mounting target side, and the bolt holes are common.

The piston rod hole 8c formed in the piston rod-side end wall member 8 passes through the piston rod 4b in a slidable manner. A sealing member 12 is mounted on the outer peripheral portion of the fitting convex portion 8a, and a sealing member 13 and a dustproof seal 14 are mounted on the outer peripheral portion of the piston rod hole 8c.

The cylinder body 3 is formed with an oil pressure port 15 for supplying / discharging oil pressure to the outbound oil chamber 10, and an oil passage 15 a connecting the oil pressure port 15 to the outbound oil chamber 10. The cylinder body 3 is further formed with an oil pressure port 16 for supplying / discharging oil pressure to the return oil chamber 11, and an oil passage 16 a connecting the oil pressure port 16 to the return oil chamber 11.

Next, the stroke end detection means 20 will be described.

The center side portion of the piston member 4 penetrates the piston 4a from its cylinder head side end surface An insertion hole 21 having a predetermined length is formed so as to extend into the piston rod 4b. The axial center of the insertion hole 21 is concentric with the axial center of the piston member 4. The length of the insertion hole 21 is substantially equal to the length of the cylinder hole 6. The oil pressure (referred to as compressed oil) in the outbound oil chamber 10 penetrates into the insertion hole 21.

A mounting hole 22 facing the insertion hole 21 and having a concentric shape with the insertion hole 21 is formed in a central portion of the cylinder head-side end wall 3 b of the cylinder body 3 in a through shape.

In addition to the above-mentioned insertion holes 21 and installation holes 22, the stroke end detection means 20 is also provided with: a mechanism chamber forming body 23 described below; first and second pipe bodies 24 and 25; first and second springs The sheet switches 26 and 27 and the first and second wire harnesses 26a and 27a; the first and second resin closing members 29 and 30; the ring-shaped permanent magnet 31; the first and second including the first and second operating members 32s and 33s 2 position adjustment mechanisms 32, 33; and first, second blocking members 34, 35, and the like.

The mechanism room forming body 23 includes a base member 36 provided with a fitting shaft portion 36 a fitted into the mounting hole 22, and a cover member 37 provided with an engagement tube portion that is engaged with a recessed portion of the base member 36. 37a, and a mechanism chamber 38 is formed between the cover member 37 and the base member 36.

The flange portion 36b of the base member 36 is in contact with the right end surface of the cylinder head-side end wall 3b, and the flange portion 37b of the cover member 37 is in contact with the right end surface of the flange portion 36b to form a plurality of pin members 39. In a state where the flange portions 36b and 37b are positioned, the base member 36 and the cover member 37 are fixed to the cylinder head side end wall 3b by four bolts 40 passing through the flange portions 36b and 37b.

The first pipe body 24 is a small-diameter pipe wall thin pipe body made of a non-magnetic body (for example, stainless steel, copper alloy, aluminum alloy, etc.). A base end portion of the first pipe body 24 is inserted through the through hole 41 formed in the fitting shaft portion 36 a in a retreatable manner and extends into the mechanism chamber 38. The base end portion of the first pipe body 24 is fitted and fixed to the The fitting hole 32b of the first movable member 32a of the first position adjustment mechanism 32. The first pipe body 24 is directly inserted into the insertion hole 21 from the through hole 41 to the left, extends into the vicinity of the rear end of the insertion hole 21, and is disposed in a hydraulic pressure (referred to as compressed oil) in the insertion hole 21.

The second pipe body 25 is also a thin pipe body with a small-diameter pipe wall made of a non-magnetic body (for example, stainless steel, copper alloy, aluminum alloy, etc.). The proximal end portion of the second tube body 25 is inserted through the through hole 42 formed in the fitting shaft portion 36a in a forward and backward manner and extends into the mechanism chamber 38. The proximal end portion of the second tube body 25 is fitted and fixed. A fitting hole 33b of the second movable member 33a of the second position adjusting mechanism 33. The second pipe body 25 is directly inserted into the insertion hole 21 from the through hole 42 to the left, extends into the base end portion of the insertion hole 21, and is disposed in the hydraulic pressure (referred to as compressed oil) in the insertion hole 21.

The “base end portion” of the first and second pipe bodies 24 and 25 means an end portion (right end portion) of the fixed side of the first and second pipe bodies 24 and 25 and means the first and second pipe bodies 24. The end portion on the side of the mechanism chamber forming body 23 of 25.

A first reed switch 26 is installed in the vicinity of the front end of the first pipe body 24, and two first wire harnesses 26a extending from the first reed switch 26 to the base end side are also installed in the first pipe body 24. The first wire harness 26 a is introduced from the base end of the first pipe body 24 to the fitting hole 32 b of the first movable member 32 a and is introduced into the mechanism chamber 38. The first and second reed switches 26 and 27 are magnetic proximity switches of a normally open type or a normally closed type.

A second reed switch 27 is installed in the vicinity of the front end of the second pipe body 25. Two second wiring harnesses extending from the second reed switch 27 to the base end side are also installed in the second pipe body 25. 27a. The second wire harness 27a is introduced from the base end of the second pipe body 25 to the fitting hole 33b of the second movable member 33a, and is introduced into the machine. 结构 室 38。 Inside the structure room 38.

The first and second resin closing members 29 and 30 that seal the first and second reed switches 26 and 27 and the first and second wire harnesses 26a and 27a are respectively filled in the first and second pipe bodies 24 and 25. internal. The first and second tube bodies 24 and 25 are attached with first and second blocking members 34 and 35 made of non-magnetic metal for sealing the front ends thereof.

In the piston 4a, an enlarged hole portion 21a having an enlarged diameter is formed at a base end portion (piston-side base end portion) of the insertion hole 21, and non-linearly arranged non-linearly arranged in the enlarged hole portion 21a The magnetic system ring-shaped member 43, the ring-shaped permanent magnet 31, and the ring-shaped fixing member 44 are fixed to the ring-shaped member 43 and the ring-shaped permanent magnet 31 by screwing the fixing member 44 to the screw hole 44a. The ring-shaped permanent magnet 31 is an element for turning ON and OFF the first and second reed switches 26 and 27, and is mounted on the outer peripheral side of the base end portion of the insertion hole 21 so as to face the insertion hole 21.

The above-mentioned ring-shaped permanent magnet 31 is oriented such that the direction of the magnetic field is directed to the radial direction, the inner peripheral surface side is set to N pole or S pole, and the outer peripheral surface side is set to S pole or N pole. However, the direction of the magnetic field may be directed toward the axial direction of the insertion hole 21, and the left end side may be set to the N pole or S pole, and the right end side may be set to the S pole or N pole.

At the positions where the first and second pipe bodies 24 and 25 pass through the through holes 41 and 42 of the fitting shaft portion 36a, O-rings 45 and 46 are respectively fitted on the first and second pipe bodies 24 and 25, and the A circular push plate 47 that presses the O-rings 45 and 46 and a snap ring 48 that presses the push plate 47 are provided.

The first and second position adjustment mechanisms 32 and 33 are provided in a mechanism chamber 38 composed of a base member 36 and a cover member 37, and the first and second position adjustment mechanisms 32 and 33 are configured to be accessible from the outside. The first and second operation structures of the operation The positions of the first and second pipe bodies 24 and 25 in the axial direction are adjusted by the operations of the pieces 32s and 33s, respectively.

The first and second position adjustment mechanisms 32 and 33 include: first and second movable members 32a and 33a, which are respectively fixed to the base ends of the first and second pipe bodies 24 and 25 in the mechanism chamber 38; The second screw holes 32c and 33c are respectively formed in the first and second movable members 32a and 33a and are parallel to the axial directions of the first and second movable members 32a and 33a; and the first and second screws The shafts 32d and 33d are integrally formed with the first and second operation members 32s and 33s, and are screwed into the first and second screw holes 32c and 33c, respectively.

The first and second wire harnesses 26 a and 27 a are four wire harnesses connected to the connection metal piece 50 screwed to the wire harness connection portion 49 on the side of the mechanism room forming body 23 and connected to the cable 51 of the connection metal piece 50. It is guided to the control element (not shown).

Next, the functions and effects of the hydraulic cylinder device 1 provided with the end-of-stroke detection function described above will be described.

When the piston member 4 reaches the forward stroke end (forward limit position), the left-right position of the first tube body 24 is set in advance by the first position adjustment mechanism 32 so that the ring-shaped permanent magnet 31 faces the first reed switch 26. In this case, when the lock nut 32n that locks the first operation member 32s is released, the first operation member 32s is rotated in the right spiral direction, so that the first pipe body 24 and the first movable member 32a can be made. Adjust the position to the right together. If you turn it in the opposite direction, you can adjust the position of the first tube 24 to the left. After this adjustment, the lock nut 32n is locked.

In addition, when the piston member 4 reaches the end of the backward stroke (backward limit position), the second position adjustment mechanism 33 is used to set the left side of the second tube 25 in advance. Position it in the right direction so that the ring-shaped permanent magnet 31 faces the second reed switch 27. In this case, the position of the second pipe body 25 can be adjusted by operating the second operation member 33s in the same manner as described above.

Therefore, when the hydraulic cylinder device 1 is in the operating state, when the piston member 4 reaches the end of the forward stroke, the ON / OFF state of the first reed switch 26 is switched; similarly, when the piston member 4 reaches the end of the backward stroke, Since the ON / OFF state of the second reed switch 27 is switched, the forward stroke end and the backward stroke end of the hydraulic cylinder 2 can be reliably detected.

Since the first and second pipe bodies 24 and 25 are directly inserted into the insertion hole 21 formed in the piston member 4, the diameters of the first and second pipe bodies 24 and 25 can be increased. Therefore, the first and second resin sealing members 29 and 30 can be filled into the first and second pipe bodies 24 and 25, respectively, so that the first and second reed switches 26 and 27 and the first and second reed switches 26 and 27 can be filled. The wiring harness is sealed with resin.

As a result, the rigidity of the first and second pipe bodies 24 and 25 is improved, the first and second pipe bodies 24 and 25 are less likely to vibrate, and the first and second reed switches 26 and 27 and the first and second wire harnesses 26a No disconnection will occur at the connection parts of 27a and 27a, and the positions of the first and second reed switches 26 and 27 will not change, which can improve the accuracy of stroke end detection. Therefore, the hydraulic cylinder device 1 having the end-of-stroke detection function having excellent durability and reliability can be realized. Moreover, since the protective tube used in the conventional technology is omitted, the manufacturing cost can be reduced.

In addition, since the first and second position adjustment mechanisms 32 and 33 are provided, the positions in the axial center direction of the first and second pipe bodies 24 and 25 can be adjusted.

Since the first and second blocking members 34 and 35 are provided to block the front ends of the first and second pipe bodies 24 and 25, respectively, the oil pressure can be prevented from going from the front ends of the first and second pipe bodies 24 and 25 to the first. 2. The second tube bodies 24 and 25 penetrate.

Next, a partial modification of the foregoing embodiment will be described.

1) In the foregoing embodiment, although an example in which a hydraulic cylinder is used as a hydraulic cylinder is described, the present invention is not limited to the hydraulic cylinder, and the present invention can be similarly applied to a pneumatic cylinder or other hydraulic cylinders.

2) In the foregoing description, although the double-acting type double-acting hydraulic cylinder is used as an example of the hydraulic cylinder, the present invention can also be applied to a spring-return type single-directional action type (sigle- acting) hydraulic cylinder.

3) In other respects, as long as it is a person skilled in the art, the present invention can be implemented in various modified forms in the foregoing embodiments without departing from the gist of the present invention, and the present invention should include these modified forms.

[Industrial availability]

The hydraulic cylinder device with the function of detecting the stroke end of the present invention can be applied to hydraulic cylinders for various purposes, especially to a hydraulic cylinder for driving a core mold.

1‧‧‧Hydraulic cylinder device with end-of-stroke detection function

2‧‧‧Hydraulic cylinder

3‧‧‧ cylinder body

3a‧‧‧ cylindrical wall

3b‧‧‧ cylinder head side end wall

4‧‧‧Piston components

4a‧‧‧Piston

4b‧‧‧Piston rod

6‧‧‧ cylinder bore

8‧‧‧Piston rod side end wall member

8a‧‧‧fit convex part

8b‧‧‧burst

8c‧‧‧Piston rod hole

9‧‧‧sealing member

10‧‧‧Outbound Oil Room

11‧‧‧Back trip oil room

12‧‧‧sealing member

13‧‧‧sealing member

14‧‧‧ dustproof seal

15‧‧‧Hydraulic port

15a‧‧‧oil road

16‧‧‧Hydraulic port

16a‧‧‧oil road

20‧‧‧Travel terminal detection means

21‧‧‧ insertion hole

22‧‧‧ installation holes

23‧‧‧ Institution Room Formation

24, 25‧‧‧ first, second tube

26, 27‧‧‧ The first and second reed switches

26a, 27a‧‧‧ first, second harness

29, 30‧‧‧ 1st and 2nd resin sealing members

31‧‧‧Ring permanent magnet

32, 33‧‧‧ 1st, 2nd position adjustment mechanism

34, 35‧‧‧ First, second blocking members

36‧‧‧ base member

37‧‧‧ cover member

38‧‧‧ Agency Room

Claims (4)

A fluid pressure cylinder device having a function of detecting a stroke end, comprising: a cylinder body; a piston member including a piston and a piston rod mounted on the cylinder body; and a stroke end detecting means for detecting a forward stroke end and a backward movement of the piston member The stroke terminal is characterized in that an insertion hole of a predetermined length is formed in the piston member so as to penetrate the piston from the end face of the cylinder head side and extend into the piston rod; and a mounting hole is formed in the cylinder. The center portion of the cylinder head-side end wall of the body, wherein the stroke end detection means includes: a mechanism room forming body having a fitting shaft portion fitted into the mounting hole; a first non-magnetic tube body, and a base. The end is supported in the mechanism chamber forming body, and the fitting shaft is penetrated and directly inserted into the insertion hole, and extends to the vicinity of the rear end thereof, and is arranged in the fluid in the insertion hole; 2 pipe body, the base end of which supports the formation body of the mechanism chamber, and the fitting shaft part is penetrated and directly inserted into the insertion hole, and extends to the base end of the insertion hole The first and second reed switches are respectively installed near the front ends of the first and second pipe bodies; the first and second wire harnesses are installed in the first and second reed switches, respectively. 1. The second tube body extends from the first and second reed switches to the base end side, respectively; the first and second resin closing members are respectively filled in the first and second tube bodies, and the first and second tube bodies are respectively filled with the first and second reed switches. The second reed switch is closed to the first and second wiring harnesses; and The ring-shaped permanent magnet is installed on the outer peripheral side of the base end portion of the insertion hole so as to face the insertion hole. According to the fluid pressure cylinder device having the function of detecting the stroke end according to item 1 of the scope of the patent application, wherein the first and second pipe systems pass through the fitting shaft part in a forward and backward manner, respectively, and extend to the mechanism room to form In the mechanism room inside the body, the aforementioned mechanism room is provided with the first and second positions which can be adjusted by the operation of the first and second operation members from the outside to adjust the positions of the first and second pipe bodies in the axial direction, respectively. Position adjustment mechanism. According to the fluid pressure cylinder device having the function of detecting the stroke end according to item 2 of the scope of the patent application, the first and second position adjustment mechanisms include: first and second movable members, which are respectively fixed in the interior of the mechanism and fixed At the base ends of the first and second pipe bodies; the first and second screw holes are respectively formed in the first and second movable members and are parallel to the axial direction of the first and second movable members; and The first and second screw shafts are integrally formed with the first and second operating members and are screwed into the first and second screw holes, respectively. The fluid pressure cylinder device having the function of detecting the stroke end as described in the first item of the scope of the patent application, wherein the fluid pressure cylinder device is provided with the first and second blocks respectively closing the front ends of the first and second pipe bodies. Blocking components.