JP3494577B2 - Sensor mounting device 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 device for mounting an accessory such as a sensor for detecting a piston position in a fluid pressure device such as a hydraulic cylinder or a pneumatic cylinder.

[0002]

2. Description of the Related Art Conventionally, various sensors for detecting the piston position of a fluid pressure cylinder are known. As a device for mounting such a sensor, a bracket fixed to one tie bolt by a set screw is used.

The bracket is made of, for example, an aluminum alloy, and is provided with a flat portion for mounting the sensor and a recess formed so as to surround the tie bolt. The sensor is fixed to the flat surface by bolts. With the tie bolt fitted in the recess, the set screw is firmly pressed against the tie bolt to be fixed.

[0004]

Since a part of the conventional bracket is manufactured by cutting, the processing cost is high and the overall cost is increased.

Further, in the conventional bracket, the sensor is only fixed to the flat surface portion by the bolt, and the fixed sensor is exposed except for the surface in contact with the flat surface portion of the bracket.

Generally, the sensor casing is often made of synthetic resin, and its mechanical strength is not so great. A tool or material may be applied to the sensor during the work of mounting the fluid pressure cylinder or the work of piping, in which case the sensor is damaged. That is, the conventional bracket does not have a protective function of protecting the sensor from an external mechanical collision.

Further, when the bracket is attached to the tie bolt of the fluid pressure cylinder, it is necessary to provide a predetermined space AA between the bracket and the cylinder cover. this is,
This is because the structures or dimensions of the fluid pressure cylinders differ from each other depending on the inner diameter of the cylinder, and therefore the detection position at the stroke end of the piston differs depending on the inner diameter of the cylinder, so that the position of the sensor is adjusted to the optimum detection position at the stroke end.

Therefore, the predetermined distance AA differs depending on the inner diameter of the cylinder. The recommended value of the interval AA is usually
It is specified in the catalog or instruction manual. At the time of factory shipment or at the time of maintenance by the user, the position of the bracket is set by actually measuring the dimensions of the actual product so as to match the recommended value of the distance AA.

When the recommended value of the distance AA is not known, the user actually operates the fluid pressure cylinder and sets the bracket while confirming that the sensor detects the stroke end.

As described above, when the bracket and the sensor are set, it is necessary to measure the dimensions and check the operation of the sensor, which is a troublesome work. The present invention has been made in view of the above problems, and an object of the present invention is to provide a mounting device that can be manufactured by sheet metal working and can reduce cost.

It is another object of the present invention to provide a device for attaching an accessory having a function of protecting a sensor or the like from a mechanical collision from the outside.

[0012]

An apparatus according to a first aspect of the present invention is constructed by fastening covers provided on both ends of a cylinder tube to each other with a plurality of tie bolts.
A sensor that detects the position of the piston in a fluid pressure cylinder .
A mounting device of the server, one engaging portion of the metal plate is bent to engage the tie bolt, the locking further extends continuously from the engagement portion to a position of the other one of the tie bolts
Between the cylinder tube and the other one tie bolt
A body portion that extends outward without passing through a space, a connecting portion that further extends from the body portion and connects the sensor , and the body portion is fixed to the other one tie bolt. And a fixing portion for fixing the one tie bolt and the other tie bolt to the body portion.
State that the sensor is connected to the connecting portion between
The sensor so that it touches the surface of the cylinder tube.
And the hole for fitting by penetrating the service, the sensor <br/> Ri name with the arranged protected portion is provided so as to protect at least a part of the outer peripheral surface of the hole, the sensor
Is just the size that fits in,
For the dimensions up to the edge of the mounting device,
When attached with the end face of the
The sir just detects the stroke end of the piston
It is set so that it will come to a different position .

In the apparatus according to the second aspect of the present invention, the fixing portion includes a fixing plate arranged so as to sandwich the tie bolt together with the body portion, and a bolt for fixing the fixing plate to the body portion. Have.

According to a third aspect of the present invention, in the body,
The part spans multiple times to have an elastic flexure.
It will be bent .

[0015] equipment according to the invention of claim 4, Shirindachi
Attach the covers on both ends of the tube to
To a fluid pressure cylinder that is constructed by fastening the
Mounting device for the sensor that detects the position of the piston in the
The metal plate so as to engage with one tie bolt.
And the other tie from the engaging part.
It continuously extends to the position of the bolt, and
Without passing between the tube and the other tie bolt
A body part that extends outward and further continuously from the body part
A connecting part extending to connect the sensor,
Fix the body part to the other one tie bolt
And a fixing portion for
Between the tie bolt and the other one tie bolt,
The cylinder chain is connected to the connecting portion.
Insert the sensor so that it touches the surface of the tube.
A hole for fitting is provided, and the hole is
The sensor is just large enough to fit in the hole
From the edge to the edge of the mounting device
Attached with the end surface of the cover in contact with
The sensor just detects the stroke end of the piston.
It is set so that it comes to the position where it will come out. An apparatus according to a fifth aspect of the present invention is an attachment device for an accessory in a device configured by fastening covers provided at both ends of a cylinder tube to each other with a plurality of tie bolts, wherein the apparatus is engaged with one tie bolt. So that the metal plate is bent, a body portion that continuously extends from the engagement portion to the position of the other one tie bolt, and an accessory that extends continuously from the body portion A connecting part for connecting and a fixing part for fixing the body part to the other one tie bolt, and the body part has the attachment on the surface of the cylinder tube. A hole for inserting and fitting the accessory so as to come into contact with the accessory
Placed to protect at least a portion of the
And a protective part, and the hole is a metal plate.
By cutting out the body part and bending a part of it
And the protection portion forms the hole portion.
It is formed by the bent portion .

The present invention relates to a fluid pressure cylinder such as a hydraulic cylinder or a pneumatic cylinder, or an accumulator, a valve,
It is applicable to other fluid pressure devices and other various devices.

[0017]

1 is a front view showing a usage state of a mounting device 5 according to the present invention, FIG. 2 is a side view showing a usage state of the mounting device 5, and FIG. 3 is a bottom view of the mounting device 5.
FIG. 4 is a front view of the mounting device 5, and FIG.
6 is a front view showing a process of processing the body portion 32 of the attachment device 5.

As best shown in FIGS. 1 and 2, the mounting device 5 is used to mount the sensor SR on the hydraulic cylinder 1. The fluid pressure cylinder 1 includes, for example, a cylinder tube 11, a piston 12 sliding in the cylinder tube 11, a piston rod 13 connected to the piston 12, an annular permanent magnet (not shown) attached to the piston 12, and a cylinder tube 11. It comprises a cylinder cover 14 provided at both ends and four tie bolts 15a to 15d for fastening the cylinder cover 14 to each other.

The sensor SR operates in response to the magnetic field generated by the permanent magnet provided on the piston 12. In addition,
The cylinder tube 11 and the piston 12 are generally made of a non-magnetic material such as aluminum alloy, stainless steel, or synthetic resin.

The mounting device 5 is composed of a main body portion 21 and a fixing portion 22 which are formed by sheet metal working of a metal plate such as stainless steel. As these materials, it is also possible to use a plate material made of carbon steel.

The main body portion 21 has an engagement portion 31 in which a metal plate is bent so as to engage with the tie bolt 15a, a body portion 32 continuously extending from the engagement portion 31 to a position of another tie bolt 15b, and a body portion. The connecting portion 33 extends continuously from 32 and connects the sensor SR.

The body portion 32 is provided with a hole portion 34 through which the sensor SR penetrates so that the sensor SR is in contact with the surface of the cylinder tube 11, and a protection surface provided to protect one side surface of the sensor SR. It has a part 35.

With reference to FIG. 6, the hole portion 34 corresponds to the body portion 32.
Is formed by cutting out a substantially central portion of the rectangle into a rectangle and bending a part of the rectangle from the broken line in the figure. The protective portion 35 is formed by a portion that is bent at a substantially right angle when forming the hole portion 34. The size of the hole 34 is set so that the sensor SR just fits therein. As a result, the position of the sensor SR is determined by fitting the sensor SR into the hole 34, and when the mounting device 5 is fixed to the predetermined position of the fluid pressure cylinder 1, the sensor SR is automatically positioned. .

The body portion 32 is bent a plurality of times so as to have a sufficient elastic bending allowance. As a result, even if there is an error in the distance between the tie bolts 15a and 15b, the dimensional error can be absorbed by the bending of the body portion 32. The bent portion is preferably set so as not to contact the surface of the cylinder tube 11, but may contact. It should be noted that the body portion 32 may be bent so as to draw a smooth curve instead of being bent multiple times.

The connecting portion 33 is provided with two screw holes 51b, and the connecting plate of the sensor SR is fixed by screwing the bolt 51. As a result, the sensor SR is fixed in a state where its detection surface is elastically slightly pressed against the surface of the cylinder tube 11.

The fixing portion 22 is formed by connecting the body portion 32 to the tie bolt 1
The fixing plate 41 is for fixing to the body portion 5b, and includes a fixing plate 41 arranged to sandwich the tie bolt 15b together with the body portion 32, and a bolt 42 for fixing the fixing plate 41 to the body portion 32.

The main body 21 and the fixed plate 41 are the same as the fixed plate 41.
Is in contact with one end side portion thereof and has a void in the other portion. Although the gap is narrowed by tightening the bolt 42, it is preferable that the fixing plate 41 be appropriately bent.

Now, the width of the main body portion 21 is set to such a position that the sensor SR just detects the stroke end of the piston 12 when the mounting device 5 is mounted in a state of being in contact with the end surface of the cylinder cover 14. It is set to come. That is, the position of the hole 34 in the main body 21,
Alternatively, the dimension from the hole 34 to the edge is set as such.

Therefore, when mounting the mounting device 5, it is only necessary to tighten the bolts 42 with the end edge of the main body portion 21 in contact with the end surface of the cylinder cover 14 . By such a simple mounting operation, the sensor SR is positioned so as to detect the stroke end of the piston 12 just.

Moreover, when mounting the mounting device 5, it is only necessary to tighten the two bolts 42.
That is, since the mounting device 5 can be mounted by tightening the bolt 42 from one direction, the mounting work of the mounting device 5 can be performed by extending the one hand with only one hand. Therefore, it is possible to easily attach and detach the attachment device 5 and the sensor SR to and from the fluid pressure cylinder 1 installed in a narrow place or a deep place.

Further, the protective portion 35 is provided on one side surface of the sensor SR.
Is provided, the sensor SR is protected from a mechanical collision due to a tool drop or the like. Since the mounting device 5 uses a metal plate as a material for the main body 21 and the fixing portion 22 and is manufactured by sheet metal working, it can be mass-produced and can be manufactured at low cost.

In the above-described embodiment, the protective portion 35 is a plate-shaped one plane, but as shown by a chain double-dashed line in FIGS.
You may comprise so that a part of upper surface of R may be protected. In this case, the portion of the sensor SR corresponding to the indicator light may be cut out.

In the above-described embodiment, the overall shape and size of the main body portion 21 and the fixing portion 22, the number and size of the bolts 42 or the bolts 51, etc. can be appropriately changed. Various shapes, dimensions, types, etc. of the sensor SR can be used. The mounting device 5 can be applied to an accumulator, a valve, other fluid pressure equipment, and other equipment in addition to the fluid pressure cylinder 1.

[0034]

According to the present invention, the mounting device can be manufactured by sheet metal working, and the cost can be reduced.

Further, it is possible to provide a mounting device having a function of protecting the sensor and the like from a mechanical collision from the outside. According to the invention of claim 3, it is easy to form the hole portion and the protection portion, and the cost can be further reduced.

According to the fourth aspect of the present invention, even if there is a large error in the spacing dimension of the tie bolts, the dimensional error can be absorbed by the bending of the body portion.

[Brief description of drawings]

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

FIG. 2 is a side view showing a usage state of the attachment device.

FIG. 3 is a bottom view of the attachment device.

FIG. 4 is a front view of the attachment device.

FIG. 5 is a sectional side view of the attachment device.

FIG. 6 is a front view showing a process of processing a body portion of the attachment device.

[Explanation of symbols]

1 Fluid pressure cylinder (equipment) 5 Mounting device 11 cylinder tube 14 Cylinder cover (cover) 15a-d tie bolt 22 Fixed part 31 Engagement part 32 body 33 Connection 34 hole 35 Protection 41 Fixed plate 42 volt SR sensor (accessory)

Continuation of the front page (56) References Actual flats 3-30608 (JP, U) Actual flats 3-100602 (JP, U) Actual open 50-17689 (JP, U) Actual open 60-49314 (JP , U) Actual development Sho 21-21674 (JP, U) Actual development Sho 63-25807 (JP, U) Actual development Sho 56-117103 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB) (Name) F15B 15/28 F16B 1/02 F16B 5/00-5/12

Claims (5)

(57) [Claims] Claim: What is claimed is: 1. A position of a piston in a fluid pressure cylinder configured by fastening covers provided at both ends of a cylinder tube to each other with a plurality of tie bolts .
That a mounting device of the sensor, one and the engagement portion where the metal plate is bent to engage the tie bolt, continuously extending further from said engaging portion to the position of the other one of the tie bolts Cylinder tube and the other one
A body part that extends outward without passing between the body part, a connecting part that extends further continuously from the body part and connects the sensor, and the body part A fixing portion for fixing to one tie bolt, and, in the body portion, the one tie bolt and the other one.
The sensor is connected to the connecting portion between the tie bolt and
A hole for inserting and fitting the sensor so as to come into contact with the surface of the cylinder tube in a state of being protected, and a protection portion arranged to protect at least a part of the outer peripheral surface of the sensor. Do Te Ri, the hole is large enough to the sensor is fitted just
And the dimension from the hole to the edge of the mounting device is
Attach with the edge of the cover in contact with the end face of the cover
The sensor detects the stroke end of the piston
A device for mounting a sensor in a fluid pressure cylinder , which is set so as to come to a position where it is exactly detected . Wherein said fixed portion includes a fixed plate disposed so as to sandwich the tie-bolts with the body portion, the fluid of claim 1 having, a bolt for fixing the fixing plate to said body portion Sensor in pressure cylinder
Over of the mounting device. Wherein said body portion is made by bending a plurality of times so as to have an elastic deflection white, Se in claim 1 or a fluid pressure cylinder according to claim 2, wherein
Mounting device of Nsa. 4. A cover provided at both ends of the cylinder tube.
Constructed by fastening bars to each other with multiple tie bolts
The position of the piston in the fluid pressure cylinder
A device for mounting a sensor, in which a metal plate is bent to engage one tie bolt
Continuing from the engaging part to the position of the other tie bolt from the engaging part
The cylinder tube and the other one
The body portion that extends outward without passing through between the body and the sensor that extends further continuously from the body portion.
And a body for fixing the body portion to the other one tie bolt.
Has a because of the fixed portion, said body portion, said other one and said one of the tie bolts
The sensor is connected to the connecting portion between the tie bolt
So that it touches the surface of the cylinder tube
There is a hole for inserting the sensor through the
The hole is large enough to fit the sensor.
And the dimension from the hole to the edge of the mounting device is
Attach with the edge of the cover in contact with the end face of the cover
The sensor detects the stroke end of the piston
A device for mounting a sensor in a fluid pressure cylinder , which is set so as to come to a position where it can be detected exactly . 5. A mounting device for an accessory in a device, which is configured by fastening covers provided on both ends of a cylinder tube to each other with a plurality of tie bolts, wherein the metal plate is engaged with one tie bolt. A bent engaging portion, a body portion that continuously extends from the engaging portion to the position of the other one tie bolt, and a connection that extends continuously from the body portion and connects the accessory And a fixing portion for fixing the body portion to the other one tie bolt, wherein the body portion is provided with the attachment so that the attachment comes into contact with a surface of the cylinder tube. A hole for inserting and inserting an object and at least a part of the outer peripheral surface of the accessory are retained.
And a protection portion arranged so as to protect the body, and the hole portion is formed by cutting out the body portion which is a metal plate.
Formed by bending a part, and the protective portion is bent when forming the hole.
An attachment device for an accessory in a device, characterized in that the attachment device is formed by a curved portion .