JP2000120615A - Hydraulic pressure cylinder device and connecting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate adjusting the detecting position of a sensor. SOLUTION: This device has a sensor groove 21a in the axial direction on the peripheral surface of a cylinder tube 11 for inserting a sensor SE, an adjusting rod 31 inserted into the sensor groove 21a to adjust the axial position of the sensor SE inserted into the sensor groove 21a and a connecting member 32 connecting the one end of the adjusting rod 31 and the sensor SE to move the sensor SE in the axial direction integrally with the adjusting rod 31 as the adjusting rod 31 moves in the axial direction. The adjusting rod 31 is constituted such that one end part of the side opposite to that connected to the sensor SE is threadedly engaged on the side of a rod cover 14, and the rod 31 is moved in the axial direction by rotating it externally on the rod cover 14 side.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hydraulic cylinder device capable of adjusting a position of a sensor for detecting a stroke position of a piston, and is particularly preferably used for connecting a sensor to an adjusting rod. Connection device to be used.

[0002]

2. Description of the Related Art Conventionally, a hydraulic cylinder device such as a hydraulic cylinder or a pneumatic cylinder is often used to clamp (fix) a work in a processing step or an assembly step of a manufacturing factory.

For example, as shown in FIG. 9, a hydraulic cylinder device 80 for clamping is mounted on a table TB of a processing station so that a piston rod 81 thereof projects upward. When the work WK is carried onto the table TB in a state where the piston rod 81 is extended, the piston rod 81 contracts, and the work WK is clamped by the clamp claws 82.

[0004] The fluid pressure cylinder device 80 is provided with a sensor for detecting the stroke position of the piston. When the sensor detects that the piston has reached a specific stroke position by clamping the work WK. Then, it is determined that the clamping has been performed normally.

The height dimension of the clamp portion of the work WK, that is, the height H1 of the clamp claw 82 during clamping
Varies depending on the type of the work WK. Further, even if the workpieces WK are of the same type, there is some variation due to manufacturing errors.

[0006]

Therefore, conventionally, in order to confirm that the work WK is normally clamped by one sensor, it is necessary to widen the detection width of the sensor.

However, when the detection width of the sensor is widened, the range considered to be normal is widened, and the possibility of erroneous judgment increases accordingly. Further, since there is a limit in widening the detection width of the sensor, each time the type of the work WK changes, the mounting position of the sensor is moved and adjusted, or a plurality of sensors are mounted in advance and their signals are switched and used. It was necessary to perform cumbersome work such as.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has a fluid pressure cylinder device capable of easily adjusting a detection position of a sensor and detecting a clamped state of various workpieces by one sensor. The purpose is to provide.

Another object of the present invention is to provide a connecting device suitable for connecting a component such as a sensor to an adjusting rod.

[0010]

According to the first aspect of the present invention, a piston (12) sliding in a cylinder tube (11) is provided.
The piston rod 13 connected to the cylinder tube 1
1 penetrates through at least one of the cylinder covers 14 and 15 provided at both ends of the
A hydraulic cylinder device configured to detect a stroke position of the piston 12 by a sensor SE responsive to the magnetism of a magnet MG mounted on the outer periphery of the cylinder tube 11 for inserting the sensor SE. Sensor groove 21a provided on the surface in the axial direction
And the sensor S inserted into the sensor groove 21a.
The sensor groove 21 for adjusting the axial position of E
a adjusting rod 31 inserted into the adjusting rod 3 and the adjusting rod 3
A connecting member 32 for connecting one end of the adjustment rod 31 and the sensor SE so that the sensor SE moves integrally in the axial direction with the movement in the axial direction 1;
The adjustment rod 31 has an end in an axial direction opposite to a side connected to the sensor SE, which is screwed on the cylinder cover side and rotated from the outside on the cylinder cover side. It is configured to move to.

In the device according to the second aspect of the present invention, the connecting member 32 is fitted into a circumferential groove 31c provided at one end of the adjusting rod 31 and is engaged with the engaging claw portion 5 in the axial direction.
1, supporting portions 54 and 52 for movably supporting the engaging claw 51 between an engaging position for engaging with the adjustment rod 31 and a disengaging position for disengaging the engaging claw 51; Holding portions 54c and 53 capable of holding the position 51 in the engagement position and moving the position 51 to the disengagement position by an operation from outside.

In the apparatus according to the third aspect of the present invention, the sensor groove 21a is provided with a protruding edge portion 41 protruding inward from both sides in the width direction at the opening thereof, and the sensor SE is provided with the protruding edge portion. It is inserted into the sensor groove 21a so as not to come out by contacting the part 41 from the back side.

In the apparatus according to the fourth aspect of the present invention, the projecting edges 41 on both sides are provided with axial slide grooves 42 at positions opposing each other, and the slide grooves 42 are made of a transparent material covering the opening. The cover 23 is inserted.

According to a fifth aspect of the present invention, there is provided an apparatus comprising:
a for adjusting the position of the component SE to be inserted into the component SE and the adjustment rod 3 to be inserted into the component groove 21a.
A coupling device 32 for coupling with the engaging claw 51, the engaging claw 51 being fitted into a circumferential groove 31c provided at one end of the adjustment rod 31 and being engaged in the axial direction; Part 5
The support portions 54 and 5 movably support the first member 1 at an engagement position where the adjustment rod 31 is engaged and a disengagement position where the engagement is released.
And holding portions 54c and 53 that can always hold the engagement claw 51 at the engagement position and move the engagement claw 51 to the disengagement position by an operation from outside.

In the apparatus according to the sixth aspect of the present invention, the holding portion is provided with a spring member for pressing a spring receiving member 52 integrally connected to the engaging claw portion 51 toward the bottom surface of the component groove 21a. 53.

In the apparatus according to a seventh aspect of the present invention, there is provided a mounting bracket 54 connected to the component SE and having a hole 54c through which the spring receiving member 52 is movably inserted. The mounting member 54 is provided between the spring receiving member 52 and the mounting member 54, and the urging force causes the mounting member 54 to move into the part groove 2.
The opening 1a is configured to be pressed against the back side of the protruding edge portion 41 protruding inward from both sides in the width direction.

[0017]

1 is a sectional front view of a hydraulic cylinder device 1 according to the present invention, FIG. 2 is a right side view of the hydraulic cylinder device 1, and FIG. 4 is a perspective view of the sensor SE, FIG. 5 is a front view of the connecting device 32, FIG. 6 is a plan view of the connecting device 32, and FIG. 7 is a left side view of the connecting device 32.

1 to 3, the fluid pressure cylinder device 1 includes a cylinder tube 11, a piston 12, a piston rod 13, covers 14, 15, a flange 16, and four tie bolts 17, and the like.

The cover 15 on the head side, the cylinder tube 11, the flange 16, and the cover 14 on the rod side are arranged in this order, and the cover 15, the cylinder tube 11, and the flange 16 have through holes, and the cover 14 has a screw hole. Holes are respectively provided, and tie bolts 17 inserted from the side of the cover 15 are screwed into screw holes provided in the cover 14 so that they are integrally fastened.
The fluid pressure cylinder device 1 is fixed to a frame or the like of another mechanical device by using the four mounting holes 29 provided in the flange 16.

The piston 12 slides on the inner peripheral surface of the cylinder tube 11. The piston rod 13 is a piston 1
2 and move integrally. Piston rod 13
Project through the cover 14 and the flange 16 to the outside. The cover 14 also functions as a bush. A packing, a dust wiper, a wear ring, or the like is provided at an appropriate position on the piston 12, the covers 14, 15, the flange 16, and the like.

The flange 16 is provided with a cam pin 18 which fits into a cam groove 13a provided on the outer peripheral surface of the piston rod 13. Therefore, the piston rod 1
When 3 moves in the axial direction, the piston rod 13 rotates along the shape of the cam groove 13a. Thus, during the stroke of the piston rod 13, the piston rod 13 can be rotated by an arbitrary angle such as 30 degrees, 45 degrees, and 90 degrees. When not rotating, the cam groove 13a may be linear.

The cylinder tube 11 has four sensor grooves 21a to 21d formed in its outer peripheral surface for inserting and attaching the sensor SE in the axial direction. Each of the sensor grooves 21a to 21d has the same cross-sectional shape, but one of the sensor grooves 21a is provided with a sensor SE so that the position of the sensor SE can be adjusted from the cover 14 side. it can. The position of the other three sensor grooves 21b to 21d cannot be adjusted from the side of the cover 14 as in the case of the sensor groove 21a, but it is necessary to rotate the mounting screws from the openings of the sensor grooves 21b to 21d to loosen them. This allows the position of the sensor SE to be adjusted.

The cover 15 of the sensor grooves 21a to 21d is provided.
A padding 22 made of synthetic rubber or the like is pushed into the end on the side by using its elastic force. A hole is provided in the center of the padding 22, where the lead wire S of the sensor SE is provided.
EC has been inserted.

A wiring groove 24 is provided on the surface of the cover 15 for fitting and crawling the lead wire SEC of the sensor SE, and the sensor SE inserted into each of the sensor grooves 21a to 21d is connected to the respective lead. Line SEC is cover 1
5 intensively withdrawn from one place.

The piston 12 has an annular magnet MG
Is mounted, the sensor SE is this magnet MG
Operates in response to the magnetism of That is, when the magnet MG comes to the sensitive position of the sensor SE, the sensor SE outputs a detection signal or an ON signal corresponding thereto, whereby the stroke position of the piston 12 is detected.

As shown in FIG. 3, for the sensor groove 21a provided in the cylinder tube 11, the flange 16 is provided with a screw hole 25 on the extension thereof, and the cover 14 is provided with a recess 26. Can be These recesses 26,
The adjustment rod 31 is mounted over the screw hole 25 and the sensor groove 21a. In addition, as shown in FIG.
The flange 16 may be provided with a through hole 25a, and a part of the cover 14 may be provided with a screw hole 26a.

The adjustment rod 31 is for adjusting the stroke position of the sensor SE by rotating the adjustment rod 31. One end of the adjustment rod 31 is connected to the sensor SE via the connection device 32 in the sensor groove 21a. A peripheral groove 31c described later is provided at one end for connection with the connection device 32.

On the other end of the adjusting rod 31, a male screw 31a and a hexagonal hole 31b are formed. Male screw 3
1a is screwed into the screw hole 25. By inserting and rotating a wrench in the hexagonal hole 31b, the adjustment rod 31 rotates and moves in the axial direction. Instead of the hexagonal hole 31b, a horizontal single character groove or a cross groove may be provided. The flange 16 is provided with a set screw 33 for fixing the adjustment rod 31 so as not to rotate.

As shown in FIG. 4, the sensor SE has a substantially rectangular parallelepiped shape, and a lead wire SEC is drawn out from one end surface. A step portion SED is provided on the side surface. As will be described later, the step portion SED comes into contact with the lower surface of the protruding edge portion 41 provided in the sensor grooves 21a to 21d, so that the sensor SE is connected to the sensor groove 21a. ~ D. Further, a concave portion SEU is provided on a side surface of the sensor SE, and a concave point SEV is provided on an edge portion thereof. By fitting a part of a mounting bracket 54 of the coupling device 32 described later into the recess SEU and the recess SEV, the stroke position of the sensor SE is determined.

Referring to FIG. 5 to FIG.
A is provided with a protruding edge portion 41 protruding inward from both sides in the width direction at the opening. The sliding grooves 4 in the axial direction are provided at the positions facing each other on the projecting edges 41 on both sides.
2 are provided. The cover 23 made of transparent acrylic that covers the opening of the sensor groove 21 is inserted into the slide groove 42.

The connecting device 32 includes an engaging claw 51, a spring receiving member 52, a spring member 53, and a mounting bracket 54.
Consists of The engaging claw portion 51 includes a flat portion 51a, a bending claw portion 51b, and a hooking claw portion 51c, and is formed by punching a metal plate material by sheet metal processing and then bending the bending claw portion 51b at a right angle.

A cylindrical shaft portion 52c at the upper end of the spring receiving member 52 is attached to the flat portion 51a by being caulked after being fitted into a hole provided therein. This allows
In the flat portion 51a, the engaging claw portion 51 and the spring receiving member 5
2 are integrally connected.

The bending claw portion 51b always fits into a circumferential groove 31c provided at one end of the adjustment rod 31. This is the engagement position of the engagement claw 51. At the engagement position, the adjustment rod 31 and the engagement claw 51 are engaged with each other in the axial direction.

The hooking claw 51c is for moving the engaging claw 51 to a disengaged position by inserting a finger or the tip of a driver into the lower surface thereof and pulling it upward.

The mounting bracket 54 is composed of two legs 54a formed so as to just fit into the recesses SEU of the sensor SE, and a flat plate portion 54b integrally connecting the two legs 54a. It is formed by punching a plate material by sheet metal processing and then bending the leg 54a at a right angle. In addition, the leg portion 54a is attached to the flat plate portion 54b.
A protruding portion 54e that protrudes without being bent to both sides at a tip portion than a portion that is continuous with the protruding portion is provided.

The leg 54a has a concave point SE of the sensor SE.
A projection 54d that fits into the V to prevent it from coming off is provided. The flat plate portion 54b is provided with a hole 54c through which the main shaft portion 52b of the spring receiving member 52 is movably inserted.
4c.

The spring member 53 is a compression coil spring.
It is mounted between the lower surface of the flat plate portion 54 b of the mounting bracket 54 and the upper surface of the flange portion 52 a of the spring receiving member 52. The lower surface of the spring receiving member 52 is pressed against the bottom surface of the sensor groove 21a by the elastic force of the spring member 53. The projecting portion 54e of the flat plate portion 54b is pressed against the lower surface of the protruding edge portion 41 by the reaction force. That is, in this state, the flat portion 51a and the flat portion 54b
And a gap is formed between them. As a result, the coupling device 32 can operate the sensor groove 2 by itself.
The sensor SE is connected to the connecting device 32 without rattling, and the rattling of the sensor SE connected to the connecting device 32 is prevented. Note that a part of the flat plate portion 54b connected to the leg portion 54a also contacts the lower surface of the protruding edge portion 41.

As described above, when the spring receiving member 52 is pressed against the bottom surface of the sensor groove 21a by the spring member 53, the engaging claw 51 is stabilized at the engaging position. By pulling the hook 51c, the spring member 53 bends and can be displaced to the disengagement position by the play between the main shaft 52b and the hole 54c.
When the engaging claw 51c is tilted by pulling the hook claw 51c, a force for tilting the mounting bracket 54 acts thereon, and most of the force is applied to the overhanging portion 54e and the lower surface of the protruding edge 41. Received by the contact with the sensor S
E is not overpowered.

As described above, the hole 54c of the mounting
The holding portion of the present invention is constituted by the spring member 53. Further, the mounting portion 54, the hole 54c thereof, and the spring receiving member 52 constitute a support portion of the present invention.

Each sensor SE can be attached to the other sensor grooves 21b to 21d as needed. For example, two sensors SE are mounted to detect both stroke ends of the piston 12. Further, another sensor SE is attached to detect the intermediate position.

Further, the position of the sensor SE attached to the sensor grooves 21b to 21d may be adjustable similarly to the case of the sensor groove 21a. In such a case, for example, through holes or screw holes are provided at positions corresponding to the sensor grooves 21b to 21d of the cover 14 and the flange 16, and the adjusting rod 3 is provided.
1 and the connecting device 32 may be attached.

Next, the operation and operation of the hydraulic cylinder device 1 will be described. By supplying a pressurized fluid to a port (not shown), the piston 12, that is, the piston rod 13 is driven in the axial direction.

The intermediate stroke position of the stroke position of the piston 12 is detected by a sensor SE provided in the sensor groove 21a. Further, both other stroke ends are detected by, for example, the other two sensors SE provided in the sensor grooves 21b to 21d. In addition, by increasing the number of sensors SE attached to one sensor groove 21a to 21d or increasing the number of sensor grooves,
It is also possible to provide a total of four or more sensors SE.

The sensor S provided in the sensor groove 21a
E can adjust the detection position by rotating the adjustment rod 31 from the cover 14 side.
Therefore, even if only the upper portion protrudes from the flange 16 and the portion of the sensor SE is below the table and cannot be accessed, or even if the sensor SE is located at the back of the device and cannot be reached, the sensor can be used. The SE detection position can be easily adjusted.

The sensor S is inserted into the sensor groove 21a.
The attachment and detachment of E can be easily performed by operating the engagement claw portion 51. That is, when removing the sensor SE from the sensor groove 21a, the engagement with the adjusting rod 31 is released by pulling the hook 51c with the cover 23 and the padding 22 removed, and the sensor SE is slid in the sensor groove 21a. Then, it is taken out from the end on the cover 15 side.

On the contrary, when connecting the sensor SE to the adjusting rod 31, the sensor SE and the connecting device 32 are connected.
Is inserted into the sensor groove 21a, and then, while the hooking claw 51c is being pulled, the bending claw 51b is set to a position where it engages with the circumferential groove 31c. Undo.

During these operations, the connecting device 32 is integral and does not fall apart, so that there is no danger of dropping parts and the operation is easy. Since the cover 23 is attached to the opening of the sensor grooves 21a to 21d and the padding 22 is attached to the end, the sensor groove 2
It is difficult for chips and dust to enter into 1a to 1d. Cover 2
Since 3 is transparent, there is no problem in checking the attachment state or the operation state of the sensor SE.

In the embodiment described above, the set screw 33 is provided on the flange 16 to prevent the rotation of the adjustment rod 31. However, instead of this, the adjustment rod 31
May be used. Alternatively, a part of the outer peripheral surface of the adjustment rod 31 may be formed into, for example, a hexagon, and a hard sphere may be pressed against the outer peripheral surface by a spring. In this case, since the hard sphere is pressed against the outer peripheral surface, which is a flat surface, the latch with an appropriate holding force is engaged. Also, a leaf spring may be used to engage such a latch.

FIG. 8 is a view showing an example in which a leaf spring 34 is used to prevent the rotation of the adjustment rod 31A. In FIG. 8, a recess 16a is provided in the flange 16, and a leaf spring 34 is fitted therein. The leaf spring 34 includes a flat portion through which the adjustment rod 31A penetrates and legs on both sides thereof. The leg portion elastically sandwiches the hexagonal surface of the adjustment rod 31A, thereby latching. The cross-sectional shape of the adjustment rod 31 can be a quadrangle, an octagon, or the like, in addition to a hexagon.

In the above embodiment, the structure of the connecting device 32 can be variously changed. Either the flange 16 or the cover 14 may be provided with a screw hole for screwing the male screw 31a of the adjustment rod 31. Further, a member other than the flange 16 and the cover 14 may be used, and a screw hole may be provided in the member.

In the above embodiment, the adjusting rod 3
Although 1 is screwed on the rod side, it may be screwed on the cover 15 on the head side and adjusted from the head side. In that case, for example, the cover 1 on the rod side
An appropriate notch may be provided in the flange 4 and the flange 16, and a screw hole may be provided in the cover 15 on the head side. Alternatively, a flange may be provided on the head side and a screw hole may be provided therein.

In addition, the structure, shape, size, number, material, etc. of each part or the whole of the hydraulic cylinder device 1 can be appropriately changed in accordance with the gist of the present invention. The connecting device 32 of the present invention can be used for adjusting the position of various components other than the sensor.

[0053]

According to the present invention, the detection position of the sensor can be easily adjusted. Therefore, for example, it is possible to detect the clamp state of various works by one sensor.

According to the fifth to seventh aspects of the present invention, it is possible to provide a suitable connecting device for connecting a component such as a sensor to an adjusting rod.

[Brief description of the drawings]

FIG. 1 is a sectional front view of a fluid pressure cylinder device according to the present invention.

FIG. 2 is a right side view of the hydraulic cylinder device.

FIG. 3 is an enlarged sectional view showing a main part of the hydraulic cylinder device.

FIG. 4 is a perspective view of a sensor.

FIG. 5 is a front view of the connecting device.

FIG. 6 is a plan view of the coupling device.

FIG. 7 is a left side view of the coupling device.

FIG. 8 is a diagram illustrating an example in which a leaf spring is used to prevent rotation of the adjustment rod.

FIG. 9 is a diagram showing an example of mounting a hydraulic cylinder device for clamping.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Fluid pressure cylinder device 11 Cylinder tube 12 Piston 13 Piston rod 14 Cover (cylinder cover) 21a-d Sensor groove (part groove) 23 Cover 31 Adjustment rod 31c Peripheral groove 32 Connecting device (connecting member) 41 Projection edge 42 Slide groove 51 engaging claw 52 spring receiving member (support) 53 spring member (holding) 54 mounting bracket 54c hole (support, holding) SE sensor (part) MG magnet

 ──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Kazumi Morimoto 1-1-1, Kitaeguchi, Higashiyodogawa-ku, Osaka-shi, Osaka Taiyo Iron Works Co., Ltd. (72) Inventor Satoru Uemura 1-1-1, Asahi-cho, Kariya-shi, Aichi Prefecture Address Toyota Machine Works Co., Ltd. F-term (reference) 3H081 AA03 BB01 CC21 GG04 GG15 GG22 GG23

Claims (7)

[Claims] A piston rod connected to a piston that slides in a cylinder tube protrudes outside through at least one of cylinder covers provided at both ends of the cylinder tube, and a magnet of a magnet mounted on the piston. A fluid pressure cylinder device configured to detect a stroke position of the piston by a sensor responsive to, a sensor groove provided in an axial direction on an outer peripheral surface of the cylinder tube for inserting the sensor, An adjusting rod inserted into the sensor groove to adjust an axial position of the sensor inserted into the sensor groove; and the sensor moves in the axial direction integrally with the axial movement of the adjusting rod. A connecting member for connecting one end of the adjusting rod and the sensor so as to The adjustment rod is configured such that one end opposite to the side connected to the sensor is screwed on the cylinder cover side and is axially moved by rotating from the outside on the cylinder cover side. A fluid pressure cylinder device. 2. The connecting member, comprising: an engaging claw that fits into a circumferential groove provided at one end of the adjusting rod and is engaged in an axial direction; A support portion for movably supporting an engaging position for engagement and a disengagement position for disengagement; and always holding the engagement claw portion in the engagement position and returning to the disengagement position by an operation from outside. The fluid pressure cylinder device according to claim 1, further comprising: a holding portion that can be moved. 3. The sensor groove is provided with a protruding edge protruding inward from both sides in the width direction at an opening thereof, and the sensor is outwardly contacted with the protruding edge from the back side. The fluid pressure cylinder device according to claim 1 or 2, wherein the fluid pressure cylinder device is inserted into the sensor groove so as not to come off. 4. A sliding cover in the axial direction is provided at a position facing each other at the projecting edges on both sides, and a transparent cover for covering the opening is inserted into the sliding groove. Hydraulic cylinder device. 5. A connecting device for connecting a component and an adjusting rod inserted into the component groove for adjusting a position of the component inserted into the component groove, wherein one end of the adjusting rod is provided. An engagement claw that fits in a circumferential groove provided in the peripheral portion and engages in the axial direction; and moves the engagement claw to an engagement position for engaging the adjustment rod and a disengagement position for disengagement. And a holding portion capable of always holding the engagement claw portion at the engagement position and moving the engagement claw portion to the disengagement position by an operation from outside. A coupling device. 6. The connection according to claim 5, wherein said holding portion includes a spring member for pressing a spring receiving member integrally connected to said engaging claw portion toward a bottom surface of said component groove. apparatus. 7. A mounting bracket connected to the component and having a hole through which the spring receiving member is movably inserted, wherein the spring member extends between the spring receiving member and the mounting bracket. 7. The device according to claim 6, wherein the mounting member is provided so as to press the mounting bracket against the back side of a protruding edge protruding inward from both sides in the width direction at the opening of the component groove. Coupling device.