JP6314899B2 - Sensor fixture - Google Patents

Description

  The present invention relates to a sensor attachment for attaching a sensor to an outer peripheral surface of a cylinder tube.

  Conventionally, a position sensor for detecting the position of a piston disposed in a cylinder tube is attached to an outer peripheral surface of a fluid pressure cylinder such as an air cylinder. As a sensor attachment for attaching this position sensor to the outer peripheral surface of a cylinder tube, for example, there is one disclosed in Patent Document 1 below.

  The sensor fixture disclosed in Patent Document 1 includes a belt-like band wound along the outer peripheral surface of a cylinder tube, and a sensor holder fixed to the belt-like band by tightening a screw. A position sensor is attached to the sensor holder. A band connecting screw is screwed into the band-shaped band, and the outer peripheral surface of the cylinder tube is tightened by the band-shaped band by tightening the band connecting screw.

JP 2004-125150 A

  By the way, the conventional sensor fixture requires a band-like band wound around the outer peripheral surface of the cylinder tube, a screw for tightening the band-like band, a screw for connecting the band-like band and the sensor holder, etc. Many are complex in structure.

  The present invention has been made in consideration of such a problem, and provides a sensor fixture capable of reducing the number of parts and simplifying the configuration as compared with a conventional sensor fixture. Objective.

In order to achieve the above object, the present invention provides a sensor attachment for attaching a sensor to an outer peripheral surface of a cylinder tube, the sensor holder for holding the sensor, the sensor holder supporting the sensor holder, and the cylinder A support portion fixed to the outer peripheral surface without surrounding the outer peripheral surface of the tube in the circumferential direction, and the support portion extends from the side portions on both sides in the width direction of the sensor holder to the outer peripheral surface of the cylinder tube. Two projecting portions projecting along, and the two projecting portions are arranged such that a range in which the sensor holder and the two projecting portions cover the cylinder tube is less than a half circumference of the outer peripheral surface of the cylinder tube. It said that protrude from the sensor holder, characterized in that.

  According to the sensor fixture of the present invention configured as described above, the support portion that supports the sensor holder does not have the form of a belt-like band wound around the outer peripheral surface of the cylinder tube as in the prior art. These are directly fixed to the outer peripheral surface of the cylinder tube. For this reason, this sensor fixture does not require a band or a screw for tightening the band. Therefore, compared with the conventional sensor fixture, the number of parts can be reduced and the configuration can be simplified.

  In the above-described sensor fixture, the support portion may be joined to the outer peripheral surface by welding, brazing, or an adhesive.

  Thereby, a support part can be firmly fixed to the outer peripheral surface of a cylinder tube with a simple joining means.

In the above sensor fixture, the outer peripheral surface of the cylinder tube may be circular arc-shaped surface.

  With this configuration, the sensor fixture can be configured as a single component. In addition, by providing the sensor holder with the protruding portion, in the work process of installing the sensor fixture on the outer peripheral surface of the cylinder tube, the sensor fixture follows the arc of the outer peripheral surface of the cylinder tube, and thus is fixed in an inclined state. This can be prevented.

The present invention is also a sensor attachment for attaching a sensor to the outer peripheral surface of the cylinder tube, the sensor holder for holding the sensor, the sensor holder supported, and the outer peripheral surface of the cylinder tube A support portion fixed to the outer peripheral surface without surrounding in the circumferential direction, and the support portion is a protruding portion protruding along the outer peripheral surface of the cylinder tube from a side portion of the sensor holder, The sensor holder has a side wall, and the side wall is divided into a plurality of wall elements spaced apart from each other along the longitudinal direction of the sensor holder, and the protruding portion may protrude from between adjacent wall elements. Good.

  According to this configuration, a portion in which the side wall is partially cut out can be formed as the protruding portion, so that the sensor holder and the support portion can be integrally formed. Therefore, a sensor fixture can be manufactured efficiently.

  In the above-described sensor mounting tool, the protruding portion may be provided on both sides of the sensor holder.

  With this configuration, the sensor fixture can be more firmly joined to the outer peripheral surface of the cylinder tube.

The present invention is also a sensor attachment for attaching a sensor to the outer peripheral surface of the cylinder tube, the sensor holder for holding the sensor, the sensor holder supported, and the outer peripheral surface of the cylinder tube A support portion fixed to the outer peripheral surface without surrounding in the circumferential direction, and the support portion is a member configured as a separate part from the sensor holder, and is fixed to the outer peripheral surface of the cylinder tube. The sensor holder is attached to the base member, the base member rising from a frame-shaped base frame and a frame-shaped inner periphery of the base frame, and the cylinder A pair of fixing ribs extending in parallel to each other along the axial direction of the tube and spaced apart in the circumferential direction of the cylinder tube; Serial sensor holder is disposed between the pair of fixing ribs.

  With this configuration, the sensor holder can be attached to the base member after the base member is fixed to the outer peripheral surface in the operation process of installing the sensor attachment tool on the outer peripheral surface of the cylinder tube. Therefore, it is easy to install the sensor fixture on the outer peripheral surface of the cylinder tube.

  In the sensor mounting tool described above, the outer peripheral surface of the cylinder tube is an arc-shaped surface, and the outer peripheral surface side surface of the base member may be provided with a recess into which a part of the outer peripheral surface enters. Good.

  With this configuration, in the work process of fixing the base member to the outer peripheral surface of the cylinder tube, since the base member follows the arc of the outer peripheral surface of the cylinder tube, it is possible to prevent the base member from being fixed in an inclined state. Therefore, the base member is easily fixed to the arcuate outer peripheral surface of the cylinder tube.

In the above sensor fixture, one the of the the previous SL fixing rib sensor holder is provided with a male engagement portion, wherein the other of the fixing rib and the sensor holder, the male engaging portion and the engaging A female engaging portion may be provided.

  With this configuration, the sensor holder can be reliably fixed to the base member with a simple structure.

  According to the sensor fixture of the present invention, the number of parts can be reduced and the configuration can be simplified as compared with the conventional sensor fixture.

It is a perspective view of the fluid pressure cylinder with which the sensor fixture concerning a 1st embodiment of the present invention was fixed. 2A is a perspective view of the sensor fixture shown in FIG. 1, and FIG. 2B is a front view of the sensor fixture shown in FIG. It is explanatory drawing of the fixing structure of the position sensor with respect to a sensor holder. It is a perspective view of the sensor fixture which concerns on the modification of 1st Embodiment. It is a perspective view of the fluid pressure cylinder with which the sensor fixture concerning 2nd Embodiment of this invention was fixed. It is a disassembled perspective view of the sensor fixture shown in FIG. It is a front view of the sensor fixture shown in FIG.

  Hereinafter, preferred first and second embodiments of a sensor fixture according to the present invention will be described with reference to the accompanying drawings. In the second embodiment, elements having the same or similar functions and effects as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

[First Embodiment]
As shown in FIG. 1, the sensor fixture 10A according to the first embodiment of the present invention is mounted on an outer peripheral surface 15 of a cylinder tube 14 of a fluid pressure cylinder 12 (for example, an air cylinder), and the position sensor 16 is attached to the above-described position sensor 16. Used to attach to the outer peripheral surface 15.

  The fluid pressure cylinder 12 includes a cylindrical cylinder tube 14 having a cylinder hole therein, a piston accommodated in the cylinder tube 14 so as to be slidable along the central axis a, and an external piston connected to the piston. And a piston rod 20 extending to the front.

  Through a port 23 of the rod cover 22 provided at one end of the cylinder tube 14 and a port 25 provided at the head portion 24 at the other end, pressure fluid (for example, compressed air) is introduced into the pressure chambers on both sides of the piston. ) Alternately, the piston moves forward or backward. A ring-shaped permanent magnet is attached to the outer periphery of the piston, and the position sensor 16 outputs a detection signal of the operating position of the piston by detecting the magnetism of the permanent magnet.

  10 A of sensor attachments are provided with the sensor holder 28 in order to hold | maintain the position sensor 16, and the protrusion part 30 as a support part which supported the sensor holder 28 and was fixed to the outer peripheral surface 15 of the cylinder tube 14. As shown in FIG. The sensor fixture 10 </ b> A is disposed along the axial direction (stroke direction) of the fluid pressure cylinder 12.

  As shown in FIGS. 2A and 2B, the sensor holder 28 includes a rectangular bottom wall 34, side walls 36 a and 36 b erected from the long sides on both sides of the bottom wall 34 and facing each other, and one end of the bottom wall 34. And an end wall 38 erected from the short side of the side. The bottom wall 34 and the side walls 36a and 36b form a sensor insertion groove 40 for accommodating and holding the position sensor 16 so that the position of the position sensor 16 can be adjusted.

  A protruding portion 42 that protrudes toward the inside of the sensor holder 28 is provided at an edge of the side walls 36 a and 36 b opposite to the bottom wall 34. Each of the side walls 36 a and 36 b is divided into a plurality (three in the illustrated example) of wall elements 37 that are separated from each other along the longitudinal direction of the sensor holder 28 (the axial direction of the fluid pressure cylinder 12). Therefore, a notch 39 is formed between adjacent wall elements 37.

  The sensor holder 28 configured as described above is made of metal such as stainless steel, for example, and can be formed by pressing and bending a metal plate.

  The position sensor 16 is inserted and fixed in the sensor holder 28 configured as described above. As shown in FIG. 3, a nut 44 is inserted into one end of the position sensor 16 attached to the sensor holder 28, and a set screw 46 is screwed to the nut 44. Then, by tightening the set screw 46, the nut 44 is pressed against the projecting portion 42 protruding from the opening edge of the sensor holder 28 toward the inside of the sensor holder 28, so that the position sensor 16 is 28 is fixed. On the contrary, by loosening the set screw 46, the movement of the position sensor 16 is allowed along the sensor insertion groove 40, and fine adjustment in the axial direction (stroke direction) of the fluid pressure cylinder 12 is possible.

  As shown in FIGS. 1 to 2B, the protruding portion 30 protrudes along the outer peripheral surface 15 of the cylinder tube 14 from one side and the other side portion of the sensor holder 28. The protrusion 30 is for fixing the sensor holder 28 to the outer peripheral surface 15, but does not surround the outer peripheral surface 15 of the cylinder tube 14 in the circumferential direction unlike the band-shaped band in the conventional sensor fixture. (It is not wound around the outer peripheral surface 15). The protrusion 30 is joined to the outer peripheral surface 15 of the cylinder tube 14 by welding, brazing, or an adhesive.

  As shown in FIG. 2B, the protrusion 30 is not parallel to the bottom wall 34, but is slightly inclined with respect to the bottom wall 34 in the direction opposite to the opening direction of the sensor insertion groove 40. The protruding portion 30 protrudes from between adjacent wall elements 37 (that is, a location where the notch 39 is provided).

  In the present embodiment, the sensor holder 28 and the protrusion 30 are integrally formed. The protrusion 30 may be a member joined to the sensor holder 28 by a joining means such as welding.

  Next, the operation and effect of the sensor fixture 10A configured as described above will be described.

  According to the sensor fixture 10A, the support portion (projecting portion 30) that supports the sensor holder 28 does not have the form of a band-like band wound around the outer peripheral surface 15 of the cylinder tube 14 as in the past, It is directly fixed to the outer peripheral surface 15. For this reason, in this sensor fixture 10A, a band, a screw for tightening the band, and the like are unnecessary. Therefore, according to the sensor fixture 10A, the number of parts can be reduced and the configuration can be simplified as compared with the conventional sensor fixture.

  Moreover, the protrusion part 30 is joined to the outer peripheral surface 15 of the cylinder tube 14 by welding, brazing, or an adhesive agent. Thereby, the protrusion part 30 can be firmly fixed to the outer peripheral surface 15 of the cylinder tube 14 with a simple joining means.

  In the case of this embodiment, since the support part which supports the sensor holder 28 is the protrusion part 30 which protruded along the outer peripheral surface 15 of the cylinder tube 14 from the side part of the sensor holder 28, 10 A of sensor attachment tools are used as one component. Can be configured. In particular, since the protrusions 30 are provided on the side portions on both sides of the sensor holder 28, the sensor attachment 10 </ b> A can be more firmly joined to the outer peripheral surface 15 of the cylinder tube 14.

  Unlike the present embodiment, if a sensor holder not provided with the protruding portion 30 is directly fixed to the outer peripheral surface 15 of the cylinder tube 14 by welding or the like, the sensor holder is fixed to the cylinder tube 14 in an inclined state. There is a fear. On the other hand, in the sensor attachment 10 </ b> A in which the sensor holder 28 is provided with the protrusion 30, the sensor attachment 10 </ b> A is disposed on the outer peripheral surface of the cylinder tube 14 in the work process of installing the sensor attachment 10 </ b> A on the outer peripheral surface 15 of the cylinder tube 14. Since it follows 15 arcs, it can be prevented from being fixed in an inclined state.

  In the case of the present embodiment, the side walls 36 a and 36 b are divided into a plurality of wall elements 37 that are separated from each other along the longitudinal direction of the sensor holder 28, and the protrusion 30 is formed between the adjacent wall elements 37. It protrudes. With this configuration, since the portion where the side walls 36a and 36b are partially cut out can be formed as the protruding portion 30, the sensor holder 28 and the protruding portion 30 can be integrally formed. Therefore, the sensor fixture 10A can be efficiently manufactured.

  Various modifications can be made to the above-described sensor fixture 10A. For example, the position and number of the protrusions 30 fixed to the outer peripheral surface 15 of the cylinder tube 14 may be arbitrarily set. Therefore, for example, like the sensor attachment 48 according to the modification of the first embodiment shown in FIG. 4, the protrusion 50 is provided at the end of the sensor holder 28 opposite to the side where the end wall 38 is provided. It may be provided. The protrusion 50 is provided in parallel with the bottom wall 34 of the sensor holder 28. Unlike the sensor fixture 10A shown in FIG. 1 and the like, each side wall 36a, 36b of the sensor holder 28 of the sensor fixture 48 is divided into two wall elements 37 that are separated from each other along the longitudinal direction of the sensor holder 28. In each side wall 36a, 36b, one protrusion 30 protrudes from a location between the two wall elements 37.

[Second Embodiment]
As shown in FIG. 5, the sensor fixture 10 </ b> B according to the second embodiment of the present invention is attached to the outer peripheral surface 15 of the cylinder tube 14 of the fluid pressure cylinder 12 (for example, an air cylinder), and the position sensor 16 is connected to the above. Used to attach to the outer peripheral surface 15.

  The sensor fixture 10 </ b> B includes a sensor holder 56 for holding the position sensor 16, and a base member 58 as a support portion that is fixed to the outer peripheral surface 15 of the cylinder tube 14 and supports the sensor holder 56. The sensor fixture 10 </ b> B is disposed along the axial direction (stroke direction) of the fluid pressure cylinder 12.

  As shown in FIG. 6, the sensor holder 56 includes a rectangular bottom wall 34, two side walls 60 a and 60 b erected from the long sides on both sides of the bottom wall 34, and one end side of the bottom wall 34. It is a rail-shaped holder which has the end wall 38 standingly arranged from the short side. The bottom wall 34 and the side walls 60a and 60b form a sensor insertion groove 40 for accommodating and holding the position sensor 16 so that the position can be adjusted. A protruding portion 42 that protrudes toward the inside of the sensor holder 56 is provided at the edge of each side wall 60 a, 60 b opposite to the bottom wall 34.

  In order to attach and fix the sensor holder 56 to the base member 58, an engagement protrusion 62 (male engagement portion) is provided on the outer surface of each side wall 60a, 60b. In the case of the present embodiment, a plurality of (two in the illustrated example) engagement protrusions 62 are provided in the side walls 60a and 60b so as to be separated from each other in the longitudinal direction of the sensor holder 56. In addition, only one engagement protrusion 62 may be provided in each side wall 60a, 60b.

  Such a sensor holder 56 is made of metal such as stainless steel, and can be formed by pressing and bending a metal plate. The method for fixing the position sensor 16 to the sensor holder 56 is the same as in the first embodiment described above.

  The base member 58 is configured as a separate component from the sensor holder 56 and is a member fixed to the outer peripheral surface 15 of the cylinder tube 14. The base member 58 is for fixing the sensor holder 56 to the outer peripheral surface 15, but does not surround the outer peripheral surface 15 of the cylinder tube 14 in the circumferential direction unlike the band-shaped band in the conventional sensor fixture. (It is not wound around the outer peripheral surface 15).

  The base member 58 is joined to the outer peripheral surface 15 of the cylinder tube 14 by welding, brazing, or an adhesive. The constituent material of the base member 58 is preferably a metal such as stainless steel.

  In the present embodiment, the base member 58 includes a pair of base plates 64 that are substantially rectangular in plan view and a top surface 64a of the base frame 64 (a surface opposite to the outer peripheral surface 15 of the cylinder tube 14). The base frame 64 is fixed to the outer peripheral surface 15. The base frame 64 is arranged with its longitudinal direction parallel to the axial direction of the fluid pressure cylinder 12.

  The base frame 64 has legs 70 that are bent from both ends in the short direction (circumferential direction of the cylinder tube 14) to the outer peripheral surface 15 side of the cylinder tube 14. Thereby, a concave portion 72 into which a part of the outer peripheral surface 15 enters is formed in the surface 64 b on the outer peripheral surface 15 side of the base frame 64. The base frame 64 may be formed in an arc shape along the outer peripheral surface 15 of the cylinder tube 14, and the concave portion 72 may be formed on the inner peripheral surface of the arc-shaped base frame 64.

  The pair of fixing ribs 66 extend parallel to each other along the longitudinal direction of the base frame 64 (the axial direction of the fluid pressure cylinder 12), and in the short direction of the base frame 64 (the circumferential direction of the cylinder tube 14). It is separated. In order to attach and fix the sensor holder 56 to the base member 58, an engagement groove 74 (female engagement portion) is provided on the inner surface of each fixing rib 66. The engagement groove 74 may be a hole penetrating in the thickness direction of the fixing rib 66, or may be a bottomed recess that is recessed from the inner surface to the outer surface of the fixing rib 66.

  In the case of this embodiment, each fixing rib 66 is provided with a plurality (two in the illustrated example) of engagement grooves 74 spaced apart in the longitudinal direction of the base frame 64. In each of the fixing ribs 66, only one engagement groove 74 may be provided.

  As shown in FIG. 7, the sensor holder 56 is disposed between the pair of fixing ribs 66 in the base member 58 configured as described above. The sensor holder 56 is fixed to the base member 58 by the engagement between the engagement protrusion 62 provided on the sensor holder 56 and the engagement groove 74 provided on the base member 58.

  In the work process of installing the sensor fixture 10B on the outer peripheral surface 15 of the cylinder tube 14, first, the base member 58 is fixed to the outer peripheral surface 15 of the cylinder tube 14 by welding or the like, and then the sensor holder 56 is attached to the base member. Attach to 58 and fix.

  As a modification, the sensor holder 56 may be provided with the engagement groove 74, and the base member 58 may be provided with the engagement protrusion 62. The means for fixing the sensor holder 56 to the base member 58 is not limited to the engagement structure formed by the engagement protrusion 62 and the engagement groove 74 described above. For example, fastening by screws, joining by welding, adhesive, brazing, or the like. There may be.

  Next, the operation and effect of the sensor fixture 10B configured as described above will be described.

  According to the sensor fixture 10B, the support portion (base member 58) that supports the sensor holder 56 does not have the form of a band-like band wound around the outer peripheral surface 15 of the cylinder tube 14 as in the past. It is directly fixed to the outer peripheral surface 15. For this reason, in this sensor fixture 10B, a band, a screw for tightening the band, or the like is unnecessary. Therefore, according to the sensor fixture 10B, the number of parts can be reduced and the configuration can be simplified as compared with the conventional sensor fixture 10B.

  In the case of the present embodiment, the support portion that supports the sensor holder 56 is a base member 58 that is a member that is configured as a separate component from the sensor holder 56 and is fixed to the outer peripheral surface 15 of the cylinder tube 14. The sensor holder 56 is attached to the base member 58. With this configuration, the sensor holder 56 can be attached to the base member 58 after the base member 58 is fixed to the outer peripheral surface 15 in the work process of installing the sensor attachment 10 </ b> B on the outer peripheral surface 15 of the cylinder tube 14. Therefore, it is easy to install the sensor fixture 10 </ b> B on the outer peripheral surface 15 of the cylinder tube 14.

  In particular, a recess 72 into which a part of the outer peripheral surface 15 enters is provided on the outer peripheral surface 15 side of the base member 58. With this configuration, in the work process of fixing the base member 58 to the outer peripheral surface 15 of the cylinder tube 14, the base member 58 is fixed in an inclined state because the base member 58 follows the arc of the outer peripheral surface 15 of the cylinder tube 14. This can be prevented.

  Furthermore, in the case of this embodiment, the base member 58 has a pair of fixing ribs 66 that extend along the axial direction of the cylinder tube 14 and are spaced apart in the circumferential direction of the cylinder tube 14. One of the sensor holders 56 is provided with a male engagement portion (engagement protrusion 62), and the other of the fixing rib 66 and the sensor holder 56 is a female engagement portion (engagement with the male engagement portion). A groove 74) is provided. With this configuration, the sensor holder 56 can be reliably fixed to the base member 58 with a simple structure.

  In the second embodiment, the same or similar operations and effects as those in the first embodiment can be obtained with respect to the parts common to the first embodiment.

  The present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the gist of the present invention.

10A, 10B, 48 ... sensor fixture 14 ... cylinder tube 15 ... outer peripheral surface 28, 56 ... sensor holder 30, 50 ... projection 58 ... base member

Claims (8)

A sensor mounting tool for mounting a sensor on the outer peripheral surface of a cylinder tube,
A sensor holder for holding the sensor;
A support unit that supports the sensor holder and is fixed to the outer peripheral surface without surrounding the outer peripheral surface of the cylinder tube in the circumferential direction ;
The support part has two projecting parts projecting along the outer peripheral surface of the cylinder tube from the side parts on both sides in the width direction of the sensor holder,
As the range in which the sensor holder and the two protrusions covers the cylinder tube serving as the outer peripheral surface less than half of the cylinder tube, said two protrusions that protrude from the sensor holder,
The sensor fixture characterized by the above-mentioned. The sensor fixture according to claim 1,
The support portion is joined to the outer peripheral surface by welding, brazing, or an adhesive.
The sensor fixture characterized by the above-mentioned. The sensor fixture according to claim 1 or 2,
The outer peripheral surface of the cylinder tube, Ru arcuate surfaces der,
Sensor fixture, wherein the this. A sensor mounting tool for mounting a sensor on the outer peripheral surface of a cylinder tube,
A sensor holder for holding the sensor;
A support unit that supports the sensor holder and is fixed to the outer peripheral surface without surrounding the outer peripheral surface of the cylinder tube in the circumferential direction;
The support portion is a protruding portion protruding from the side portion of the sensor holder along the outer peripheral surface of the cylinder tube,
The sensor holder has a side wall;
The side wall is divided into a plurality of wall elements spaced apart from each other along the longitudinal direction of the sensor holder,
The protrusion protrudes from between adjacent wall elements.
The sensor fixture characterized by the above-mentioned. The sensor fixture according to claim 4 ,
The protrusions are provided on both sides of the sensor holder.
The sensor fixture characterized by the above-mentioned. A sensor mounting tool for mounting a sensor on the outer peripheral surface of a cylinder tube,
A sensor holder for holding the sensor;
A support unit that supports the sensor holder and is fixed to the outer peripheral surface without surrounding the outer peripheral surface of the cylinder tube in the circumferential direction;
The support portion is a member configured as a separate part from the sensor holder, and is a base member fixed to the outer peripheral surface of the cylinder tube.
The sensor holder is attached to said base member,
The base member rises from a frame-shaped base frame and a frame-shaped inner peripheral portion of the base frame, extends in parallel with each other along the axial direction of the cylinder tube, and extends in the circumferential direction of the cylinder tube A pair of fixing ribs spaced apart from each other,
The sensor holder is disposed between the pair of fixing ribs,
The sensor fixture characterized by the above-mentioned. The sensor fixture according to claim 6,
The outer peripheral surface of the cylinder tube is an arc-shaped surface,
A concave portion into which a part of the outer peripheral surface enters is provided on the outer peripheral surface side of the base member.
The sensor fixture characterized by the above-mentioned. The sensor fixture according to claim 6 or 7 ,
While the of the sensor holder to the previous SL fixing rib, male engaging portion is provided,
The other of the fixing rib and the sensor holder is provided with a female engaging portion that engages with the male engaging portion.
The sensor fixture characterized by the above-mentioned.

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