JP2002174207A - Position sensor installing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To always install a position sensor in the best condition regardless of experience of a worker. SOLUTION: This position sensor installing device is provided with an installing plate member 21 made of a metallic plate, and a gripping member 22 attached at one end portion of the installing plate member 21 so as to clip and abut a tie-bolt 15a. The installing plate member 21 is provided with a gripping plate portion 31 at one end portion, a folding back plate portion 33 wrapping the outer periphery of another tie-bolt 15b and elastically abutting to engage with the tie-bolt 15b at the other end, and a sensor installing plate member 32 supporting a position sensor SE along an outer peripheral surface of a cylinder tube. The gripping member 22 has a generally U-shape in a side view, and the tie-bolt 15a is fitted in the U-shape and attached to the gripping plate portion 31 by a screw, so that the gripping member and the gripping plate portion put and abut one tie-bolt between them.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a position used in a fluid pressure device in which members such as covers provided on both end surfaces of a cylinder tube are fastened to each other with a plurality of tie bolts, such as a fluid pressure cylinder device. The present invention relates to a sensor mounting device.

[0002]

2. Description of the Related Art Conventionally, a position sensor is used to detect a stroke position of a piston of a hydraulic cylinder device.

[0003] The position sensor is mounted along the outer peripheral surface of the cylinder tube, and is operated by a magnetic field of a permanent magnet mounted on the piston when the piston reaches a stroke position where the position sensor is mounted.

Conventionally, such a position sensor has
It is attached to one of a plurality of tie bolts for fastening two cylinder covers disposed at both ends of the cylinder tube.

[0005] Such a position sensor is fixed, for example, by fitting a fitting having a U-shaped cross section made of an aluminum mold into a tie bolt and tightening a screw to cut into the outer peripheral surface of the tie bolt.

[0006]

However, in the conventional mounting bracket described above, since the mounting bracket is mounted on one tie bolt, the mounting surface is set so that the detection surface of the position sensor is along the outer peripheral surface of the cylinder tube at the time of mounting. , It is necessary to mount it by pressing it against the cylinder tube.

However, the position sensor is not always mounted in the best condition depending on the place where the fluid pressure cylinder device is installed, the degree of the operator's familiarity, and the like. May be mounted in a state of being lifted from the outer peripheral surface of the cylinder tube.

[0008] In this case, although the use of the permanent magnet may be performed for a while, the detection operation may not be performed normally due to a decrease in the magnetic force of the permanent magnet or a change in the sensitivity of the position sensor due to long-term use.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has as its object to enable a position sensor to be always mounted in the best condition without depending on the degree of familiarity of an operator.

[0010]

A mounting device according to the present invention is a mounting device for a position sensor used in a fluid pressure device in which members provided on both end surfaces of a cylinder tube are fastened to each other with a plurality of tie bolts. A tie bolt that holds the tie bolt by pressing against the outer peripheral surface of the tie bolt, and a part of the outer periphery of another tie bolt that extends from the grip portion and winds around the tie bolt, and elastically contacts the tie bolt. A folded portion that opens toward the grip portion, and the other portion is pulled by the grip portion when the grip portion is attached to the one tie bolt. The outer peripheral surface of one tie bolt enters the folded portion to generate the elastic force.

The mounting plate member includes a mounting plate member made of a strip-shaped metal plate, and a gripping member mounted at one end of the mounting plate member so as to be pressed against one tie bolt. Is wound at one end to the side of the cylinder tube to which the gripping member is attached, and at the other end, a part of the outer periphery of another tie bolt is wound and elastically contacts the tie bolt. A folded plate portion, which is located between the gripping plate portion and the folded plate portion, for supporting the position sensor along the outer peripheral surface of the cylinder tube; and The gripping member has a substantially U-shape in side view, and the one tie bolt is fitted into the U-shape, and is attached to the gripping plate by a screw. With the gripping member and the holding plate portion is configured to press across the single tie bolts.

[0012] Preferably, the gripping member is formed by bending both ends of an oval and ring-shaped plate material. Further, the sensor mounting plate portion is provided with a bracket portion for detachably mounting the position sensor, and the position of the bracket portion on the sensor mounting plate portion is in the axial direction of the sensor mounting plate portion. When one end edge contacts the member, the position sensor attached to the bracket detects the stroke end of the piston moving in the cylinder tube.

[0013]

FIG. 1 shows a mounting device 5 according to the invention.
2 is a plan view of the mounting device 5, and FIG. 3 is a diagram for explaining a method of manufacturing the gripping member 22.

In these figures, the mounting device 5 is mounted on tie bolts 15a and 15b of the hydraulic cylinder device 1. That is, the fluid pressure cylinder device 1
A cylinder tube 11, a cover 14 provided on one end surface of the cylinder tube 11, a cover (not shown) provided on the other end surface, four tie bolts 15a to 15d for fastening the two covers together, and an illustration sliding in the cylinder tube 11 And a piston rod (not shown) connected to the piston. The structure of the hydraulic cylinder device 1 itself is well known. The two covers correspond to members in the present invention.

The mounting device 5 includes a mounting plate member 21 made of a strip-shaped metal plate, and a gripping member 22 mounted at one end of the mounting plate member 21 so as to be pressed against one tie bolt 15a. As the metal plate, for example, carbon steel, stainless steel, an aluminum alloy, or the like is used.

The mounting plate member 21 has a gripping plate portion 31, a sensor mounting plate portion 32, and a folded plate portion 33.
Such a mounting plate member 21 is manufactured by punching and bending a metal plate by sheet metal processing.

The grip plate portion 31 is formed by bending one end of the mounting plate member 21 toward the cylinder tube 11. In this embodiment, it is bent linearly at one place, but it may be bent by drawing an appropriate arc.

The folded plate portion 33 winds a part of the outer periphery of another tie bolt 15b at the other end of the mounting plate member 21 and elastically contacts and engages with the tie bolt 15b. The folded plate portion 33 is bent at a radius slightly smaller than the radius of the tie bolt 15b, and is not bent up to 180 degrees but is slightly opened.

Therefore, the interval between the open ends of the folded plate portion 33 is slightly larger than the diameter of the tie bolt 15b, and the tie bolt 15b easily enters here. However, since the inner part is smaller than the diameter of the tie bolt 15b, it does not enter the inner part but stops in a state of being pressed against the middle.

The sensor mounting plate portion 32 is located between the grip plate portion 31 and the folded plate portion 33 and supports the position sensor SE along the outer peripheral surface of the cylinder tube 11. A notch 51 for mounting the position sensor SE and a bracket 52 are provided at the center of the sensor mounting plate 32.
Is provided.

The notch 51 is large enough for the position sensor SE to enter. The bracket part 52 is obtained by bending a part of the sensor mounting plate part 32 when the notch part 51 is formed. Two holes are provided in the bracket part 52, and the screws 53, 53 are inserted into the holes, so that the position sensor SE is attached.

The positions of the notch 51 and the bracket 52 in the circumferential direction are determined by adjusting the mounting device 5 with the tie bolts 15a and 15b.
When installed on the tie bolt 15
It is set so as to be located exactly in the middle between a and b and correctly located along the outer peripheral surface of the cylinder tube 11.

The position of the bracket 52 in the axial direction is determined when the one end in the axial direction of the sensor mounting plate 32 (mounting plate member 21) is in contact with the cover 14 and mounted. Is a position where the stroke end of the piston moving in the cylinder tube 11 is detected, that is, for example, the dimension A which is the distance from the edge of the sensor mounting plate 32 to the edge of the notch 51 is Various appropriate values are set according to the cylinder diameter of the fluid pressure cylinder device 1. Therefore, the bracket 5
2, a position sensor SE is attached to the sensor mounting plate 32.
Of the piston comes into contact with the cover 14 and is attached to the cover 14, so that when the piston comes into contact with the cover 14 to reach the stroke end or shortly before, the position sensor S
E will detect the piston.

Therefore, when detecting the stroke end of the piston in mounting the mounting plate member 21, it is sufficient to mount the mounting plate member 21 in contact with the cover 14, and the position setting is easy and reliable, and the mounting reliability is high. .

In the past, the position of the position sensor mounting device had to be measured and adjusted to have a specific size determined according to the cylinder diameter, and the mounting was not easy. .

As shown in FIG. 1, the gripping member 22 has a substantially U-shape in side view. The U-shaped interval (diameter of the circumferential portion) is slightly larger than the diameter of the tie bolts 15a, 15b. The U-shaped depth is slightly smaller than the diameter of the tie bolts 15a, 15b.

One tie bolt 15a is fitted in the U-shape, and is attached to the holding plate 31 by four screws 23, 23. By tightening the four screws 23, the gripping member 22 and the gripping plate 31 are drawn toward each other. Thereby, the holding member 22 and the holding plate portion 3
No. 1 sandwiches one tie bolt 15a and presses it against it.

As shown in FIG. 3, the gripping member 22 is formed by bending both ends of an oval ring-shaped plate 22A at the positions of arrows M1 and M2. By bending, the mounting piece 41 at the center and the gripping pieces 42a at both ends,
42b are formed. The plate member 22A is provided with holes 24 for attachment.

Next, a method of mounting the mounting device 5 will be described. First, the position sensor SE is attached to the bracket 52. The holding plate portion 31 is inserted between the cylinder tube 11 and the tie bolt 15a, and at the same time, the folded plate portion 33 is engaged with the tie bolt 15b so as to be hooked from outside.

The gripping member 22 is covered from the outside of the tie bolt 15a, and the four screws 23, 23,.
And the holding plate 31 are fastened. As a result, the grip plate portion 31 is pulled rightward in FIG. 1, and accordingly, the folded plate portion 33 is also pulled in the same direction.

Then, the outer peripheral surface of the tie bolt 15b enters the folded plate portion 33 and elastically deforms the folded plate portion 33. Thereby, an elastic force is generated in the folded plate portion 33. The four screws 23 are appropriately tightened.

Thus, as shown in FIG. 1, the position sensor SE is mounted at a position exactly intermediate between the tie bolts 15a and 15b and along the outer peripheral surface of the cylinder tube 11. The position of the position sensor SE is always mounted in the best condition regardless of the work method or the degree of familiarity of the worker.

According to the mounting device 5 of the above embodiment,
Since the edges of the gripping pieces 42a and 42b of the gripping member 22 bite into the tie bolt 15a, the gripping force is strong, and there is no possibility that the gripping member 22 may unexpectedly move along the axial direction of the tie bolt 15a.

Although the interval between the tie bolts 15a and 15b varies according to the component tolerance, the variation is compensated for satisfactorily by the elastic force of the folded plate portion 33, and stable mounting is possible.

According to the above embodiment, the mounting plate member 21
Since the gripping member 22 is manufactured from a metal plate by sheet metal processing, the cost of the mold and the processing are low, and the manufacturing cost is reduced. In addition, since it can be easily manufactured, a necessary quantity may be manufactured when necessary according to the number of orders. So you can reduce extra inventory,
The production according to the production of the fluid pressure cylinder device 1 becomes possible.

In the above embodiment, the folded plate portion 33 is bent in an arc shape, but may be bent in a trapezoidal shape as shown in FIG. 4, for example. The shape of the bracket 52 and the notch 51 can be various shapes or structures in accordance with the shape of the position sensor SE and the like. The mounting plate member 21 or the gripping member 22 may be formed of a synthetic resin.

In addition, the structure, shape, size, number, material, and the like of the whole or each part of the mounting device 5 or the hydraulic cylinder device 1 can be appropriately changed in accordance with the gist of the present invention.

The present invention can be applied to various fluid pressure devices other than the fluid pressure cylinder device 1, for example, valves, accumulators, pressure intensifiers and the like.

[0039]

According to the present invention, the position sensor can always be mounted in the best condition regardless of the degree of familiarity of the operator.

[Brief description of the drawings]

FIG. 1 is a front view of a mounting device according to the present invention.

FIG. 2 is a plan view of the mounting device.

FIG. 3 is a view for explaining a method of manufacturing a gripping member.

FIG. 4 is a diagram showing an example of another shape of the folded plate portion.

[Explanation of symbols]

 Reference Signs List 1 fluid pressure cylinder device (fluid pressure device) 5 mounting device 11 cylinder tube 14 cover (member) 15a tie bolt (one tie bolt) 15b tie bolt (other one tie bolt) 21 mounting plate member 22 gripping member 23 screw 31 gripping plate 32 Sensor mounting plate part 33 Folded plate part (returned part) 52 Bracket part 22A Plate material SE Position sensor

Claims (4)

[Claims] An apparatus for mounting a position sensor used in a fluid pressure device in which members provided on both end surfaces of a cylinder tube are fastened to each other with a plurality of tie bolts, wherein the device is pressed against an outer peripheral surface of one tie bolt. A grip portion that grips the tie bolt, and a folded portion that extends from the grip portion, winds a part of the outer periphery of another tie bolt, elastically contacts and engages with the tie bolt, The folded portion is open toward the grip portion,
The outer peripheral surface of the other one of the tie bolts is configured to enter the turn-back portion and generate the elastic force by pulling by the grip portion when the grip portion is attached to the one tie bolt. A mounting device for a position sensor, characterized in that: 2. A mounting device for a position sensor used in a fluid pressure device in which members provided on both end surfaces of a cylinder tube are fastened to each other with a plurality of tie bolts, the mounting device comprising a band-shaped metal plate. A gripping member attached to one end of the mounting plate member so as to be pressed against one tie bolt;
The mounting plate member has a grip plate portion to which the gripping member is attached by being bent to the cylinder tube side at one end and a part of the outer periphery of another tie bolt at the other end, A folded plate portion that elastically contacts and engages with the tie bolts, and a sensor mounting for supporting the position sensor along the outer peripheral surface of the cylinder tube between the gripping plate portion and the folded plate portion. The gripping member has a substantially U-shape when viewed from the side, and the one tie bolt is fitted into the U-shape, and is attached to the gripping plate by a screw, so that the gripping is performed. A device for mounting a position sensor, wherein a member and the gripping plate portion are configured to be pressed against each other with the one tie bolt interposed therebetween. 3. The position sensor mounting device according to claim 2, wherein said gripping member is formed by bending both ends of an oval and ring-shaped plate material. 4. The sensor mounting plate has a bracket for detachably mounting the position sensor. The position of the bracket on the sensor mounting plate is the position of the sensor mounting plate. 4. A position where a position sensor attached to the bracket portion detects a stroke end of a piston moving in the cylinder tube in a state where one end edge in an axial direction abuts on the member. A mounting device for the position sensor as described in the above.