JP2019023485A - Attachment device - Google Patents

Abstract

To avoid the situation that scars occur on a bottom surface of a recess part, in attaching a component such as a sensor, to the recess part such as a lateral groove of a cylinder.SOLUTION: An attachment device 100 comprises: an attachment object receiving part 10 configured to receive an attachment object to a recess part; a screw receiving part 20 provided adjacently to the attachment object receiving part 10; and a screw 30 screwed into the screw receiving part 20, and having a screw part and a conical seating face part. The screw receiving part 20 comprises, at a position opposite to the seat face part, a pair of piece parts 24, 26 having a planar part made into an opened state by screwing the screw 30 and pressed to a side face of the recess part.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an attachment device, and more particularly, to an attachment device for attaching a component to a recess such as a lateral groove of a cylinder.

  In Patent Document 1, as an explanation using FIG. 6, the position detection device is inserted into a groove formed on the side surface of the air cylinder main body, and then is screwed into a screw passage portion provided in the position detection device. And the front end of the retaining screw hits the bottom opposite to the opening portion of the groove, and the position detection device main body presses against the inner wall adjacent to the opening portion of the groove. And is attached to the air cylinder body.

Table 2005/124273

  However, in the mounting method disclosed in Patent Document 1, the tip of the screw bites into the bottom surface of the lateral groove of the cylinder, and a small-diameter hole corresponding to the tip of the screw may be formed on the bottom surface. is there.

  Here, since the sensor may be attached to the cylinder with an accuracy of 0.05 mm to 0.10 mm, it may be necessary to precisely adjust the position of the sensor with respect to the cylinder before using the cylinder.

  This position adjustment is usually performed by moving the sensor to the desired position in the lateral groove of the cylinder with the mounting device screw loosened, and then actually operating the cylinder to reach the desired position. Once confirmed, do this by tightening the screws. However, when the above level of accuracy is required, it is necessary to loosen the screw once tightened, move the sensor to the desired position in the lateral groove of the cylinder, and tighten the screw again. Sometimes.

  However, when the screw is tightened again, the tip of the screw may be guided into the small-diameter hole that has already been formed, and the alignment may not be performed successfully. In addition, while the cylinder is in use, the cylinder itself vibrates due to its operation, or vibration generated by the operation of the device to be connected is transmitted and vibrates. As a result, when the screw of the attachment device is slightly loosened, the attachment device may be displaced so that the tip of the screw is guided into the already formed small diameter hole.

  In order to prevent this, it is conceivable that the screw is strongly tightened only at the final sensor mounting position so that the sensor is not displaced by a certain amount of vibration. However, if the sensor is replaced for any reason, the same problem will eventually occur. Further, the attachment target may be exchanged without replacing the sensor, and the attachment target often has individual differences exceeding several μm, and thus the same problem may occur in this case.

  Therefore, an object of the present invention is to avoid a situation in which a bottom surface of a recess is damaged when a component such as a sensor for a recess such as a lateral groove of a cylinder is attached.

In order to solve the above problems, the mounting device of the present invention is:
A mounting target receiving portion for receiving a mounting target for the recess, a screw receiving portion provided adjacent to the mounting target receiving portion, a screw portion screwed into the screw receiving portion, and a screw having a conical seat surface portion A mounting device comprising:
The screw receiving portion includes a plurality of pieces having a planar portion that is opened by screwing the screw at a position facing the seat surface portion and is pressed against the side surface of the recess.

  That is, the present invention is not attached in such a manner that the tip of the screw bites into the bottom surface of the recess by tightening the screw, but is attached by pressing the side surface portion of each piece to the side surface of the recess. ing. And since each deformation | transformation part has a planar part, it is not attached by conventional point contact but attached by surface contact. As a result, a small-diameter hole formed by the tip of the screw is not formed. Therefore, even if vibration occurs in the cylinder, it is possible to avoid displacement of the mounting device.

  Each piece may have a conical portion having a shape corresponding to the seat surface portion.

  Furthermore, each said planar part can be made into a curved surface form.

  Furthermore, the angle of the seat portion with respect to the axis can be made smaller than the angle of the conical portion with respect to the axis.

It is a typical perspective view of attachment device 100 of an embodiment of the present invention. It is a perspective view which shows the coupling | bonding state of the screw receiving part 20 and the screw 30 which comprise the attachment apparatus 100 shown in FIG. It is a disassembled perspective view of the screw receiving part 20 and the screw 30 shown in FIG. It is a schematic diagram which shows the state which attaches a sensor to the horizontal groove 130 of a cylinder using the attachment apparatus 100 shown in FIG. FIG. 5 is an orthogonal cross-sectional view in the longitudinal direction of a square groove type horizontal groove 130 and a round groove type horizontal groove shown in FIG. 4.

10 Mounting target receiving part 20 Screw receiving part 30 Screw 40 LED
50 Cable outlet 100 Mounting device

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a schematic perspective view of a mounting device 100 according to an embodiment of the present invention. FIG. 1 shows an attachment target receiving portion 10, a screw receiving portion 20, a screw 30, an LED 40, and a cable outlet 50 described below.

  In addition, the attachment apparatus 100 shown in FIG. 1 is the attachment apparatus 100 with respect to a recessed part with a square cross section, Therefore, a rough shape is a rectangular parallelepiped. Therefore, the attachment device 100 for the recess having a round cross section can have a cylindrical shape.

  The attachment target receiving portion 10 receives an attachment target such as a sensor attached to a recess such as a lateral groove of the cylinder. For example, the attachment target receiving portion 10 has an opening at an obliquely lower rear side in the drawing, and the attachment target may be inserted therein and fixed with an adhesive or the like as appropriate. The attachment receiving part 10 is not limited to this, but can be made of resin.

  The screw receiving portion 20 is provided adjacent to the attachment target receiving portion 10 and is a portion to which the screw 30 is screwed. The specific configuration of the screw receiving portion 20 will be described later with reference to FIGS. 2 and 3. When the mounting target receiving portion 10 is made of resin, the mounting target receiving portion 10 is made of metal, aluminum, or the like. It is good to open the adjacent position of and connect it by press-fitting etc. there.

  The screw 30 is screwed into the screw receiving portion 20. The attachment device 100 can be fixed to the recess by screwing the screw 30 into the screw receiving portion 20. A specific configuration of the screw 30 will also be described later with reference to FIGS.

  LED 40 indicates that the piston has reached the end of the stroke when the concave portion is a lateral groove of the cylinder and the object to be attached is a positioning sensor for determining the stroke of the piston in the cylinder. Can be turned on or blinked when the arrival of is detected. It should be noted that the LED 40 is not necessarily provided.

  The cable outlet 50 is formed in order to take out the cable when the attachment object such as the sensor inserted into the attachment object receiving portion 10 has a cable. Therefore, when the attachment target does not have a cable, the cable outlet 50 is not necessarily provided.

  FIG. 2 is a perspective view showing a coupled state of the screw receiving portion 20 and the screw 30 constituting the attachment device 100 shown in FIG. FIG. 3 is an exploded perspective view of the screw receiving portion 20 and the screw 30 shown in FIG. 2 and 3 show a threaded portion 22, pieces 24 and 26, a head portion 32, a tool hole 34, a seat surface portion 36, and a screw portion 38, which will be described below.

  The threaded portion 22 has a cylindrical shape, and an internal thread is formed on the inner wall thereof so as to be screwed with the threaded portion 38. Further, the outer wall can be connected to an opening at an adjacent position of the attachment receiving part 10 by press fitting or the like. The size of the threaded portion 22 is not limited to this, but the outer diameter is about 2 to 3 mm, the length is about 2 to 3 mm, and the outer diameter difference is about 0.3 to 0.5 mm. That's fine.

  The pieces 24 and 26 are formed integrally with the threaded portion 22, and are a pair of parts positioned on the upper portion of the threaded portion 22. The piece portions 24 and 26 have surface portions 24A and 26A that are opened by screwing screws 30 into positions facing the seat surface portion 36 and pressed against the side surfaces of the recesses. Each of the planar portions 24A and 26A has a curved surface shape here. Although the central portions of the pieces 24 and 26 have conical portions 24B and 26B having an angle corresponding to the seating surface portion 36, such a shape is not essential.

  The sizes of the pieces 24 and 26 are not limited to this, but the width is about 3 mm to 4 mm, the length is about 5φ to 7φ as a whole, and the thickness is about 1 mm to 2 mm. Good. In this example, each of the conical portions 24B and 26B is set to 40 ° with respect to the axial direction.

  When the transverse groove of the cylinder is a recess, the attachment device 100 is attached in such a manner that the traveling direction when the screw 30 is tightened or loosened and the longitudinal direction of the transverse groove are orthogonal to each other. Thus, it may be formed by dividing into two.

  Further, when the direction of travel when tightening or loosening the screw 30 is the same as the longitudinal direction of the recess, it may be divided into two in the same manner, but instead of the pieces 24 and 26, these may be replaced with It may be something like three or four. If it carries out like this, the press area with respect to the side surface of a recessed part and the number of press will increase, and more stable attachment will be attained.

  The head 32 has a flat top portion and a conical surface portion 36. The shape of the top of the head 32 is not limited to the embodiment shown in FIGS. 2 and 3 and may be a hemispherical shape. The size of the head 32 is not limited to this, but the width may be about 3 mm to 4 mm, and the overall length may be about 1.0 mm to 1.5 mm.

  The tool hole 34 can be tightened or loosened with a tool such as a flat-blade screwdriver. The shape of the tool hole 34 is not limited to that shown in FIGS. 2 and 3, and may be a shape corresponding to another tool such as a Phillips screwdriver or a hexagon wrench. The depth of the tool hole 34 is not limited to this, but may be about half the height of the head 32.

  The seat surface portion 36 is for opening the pieces 24 and 26 by screwing the screw 30 into the screw receiving portion 20, and has a conical shape. The seat surface portion 36 is a so-called countersunk screw. Although not limited to this, the conical angle of the seat surface portion 36 is appropriately selected, for example, from a range of about 20 ° to 45 ° with respect to the axial direction of the screw portion 38, and the height of the seat surface portion 36. Is, for example, about 1.5 mm to 20 mm.

  In this example, the angle is 30 ° with respect to the axial direction of the screw portion 38. That is, the angle related to the seat surface portion 36 is smaller than the corresponding angle related to the pieces 24 and 26 in order to make the pieces 24 and 26 open when screwed.

  The screw part 38 is screwed into the threaded part 22. Therefore, a male screw corresponding to the female screw on the inner wall of the threaded portion 22 is formed on the outer wall. The size of the screw portion 38 is not limited to this, but the width may correspond to the inner wall of the threaded portion 22 and the overall length may be about 1.0 mm to 1.5 mm.

  However, it is necessary that the tip of the screw portion 38 is located above the bottom surface of the mounting device 100 so as not to damage the bottom surface of the lateral groove of the cylinder at the most screwed point.

  FIG. 4 is a schematic view showing a state in which the sensor is attached to the lateral groove 130 of the cylinder using the attachment device 100 shown in FIG. FIG. 4 shows a piston 110 of a cylinder and an air cylinder main body 120 including the piston 110 in addition to a mounting device 100 including a screw 30 and a minus driver 160 as a mounting tool.

  The air cylinder body 120 is formed with a lateral groove 130 to which the sensor is attached by the attachment device 100. In addition, it may replace with the horizontal groove 130 and the hole and the hollow may be formed.

  First, the attachment device 100 is inserted into the lateral groove 130 formed on the side surface of the air cylinder main body 120 and is adjusted to a desired position. Subsequently, after the screw 30 is aligned with the screw receiving portion 20 provided in the attachment device 100, the screw 30 is tightened using the minus driver 160.

  As a result, the pieces 24 and 26 of the screw receiving portion 20 are opened, abutting against the side surface of the lateral groove 130, the attachment device 100 is pressed against the side surface of the lateral groove 130, and attached to the air cylinder body 120.

  For this reason, according to the attachment apparatus 100 of this embodiment, when attaching a sensor with respect to the horizontal groove 130 of the air cylinder main body 120, the situation where the bottom face of the horizontal groove 130 is damaged can be avoided.

5A is an orthogonal cross-sectional view in the longitudinal direction at the mounting position of the mounting device 100 in the lateral groove 130 of the square groove type shown in FIG. FIG.5 (b) is orthogonal sectional drawing of the longitudinal direction of the round groove type horizontal groove of the modification of Fig.5 (a).
As shown in FIG. 5A, when the pieces 24 and 26 of the screw receiving portion 20 are opened, the side surfaces of the attachment target receiving portion 10 do not contact the side surfaces of the lateral grooves 130, but the pieces 24 and 26 are in contact with each other. The planar portions 24 </ b> A and 26 </ b> A are in contact with the side surface of the lateral groove 130. That is, the attachment device 100 is fixed on the side surface of the lateral groove 130 through the planar portions 24A and 26A of the piece portions 24 and 26.

  In the case shown in FIG. 5B, the outer diameter of the attachment target receiving portion 10 of the attachment device 100 is also changed to a cylindrical shape in accordance with the shape of the lateral groove 130. Also in this case, as in the case of FIG. 5A, when the pieces 24 and 26 of the screw receiving portion 20 are in the open state, the attachment device 100 passes through the planar portions 24A and 26A of the pieces 24 and 26. It is fixed on the side surface of the lateral groove 130.

Claims (4)

A mounting target receiving portion for receiving a mounting target for the recess, a screw receiving portion provided adjacent to the mounting target receiving portion, a screw portion screwed into the screw receiving portion, and a screw having a conical seat surface portion A mounting device comprising:
The screw receiving portion includes a plurality of pieces having a planar portion that is in an open state by screwing the screw into a position facing the seat surface portion and is pressed against a side surface of the recess. .   The attachment device according to claim 1, wherein each piece includes a conical portion having a shape corresponding to the seat surface portion.   The attachment device according to claim 1, wherein each of the planar portions has a curved shape.   The mounting device according to claim 1, wherein an angle of the seat surface portion with respect to the axis is smaller than an angle of the conical portion with respect to the axis.

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