JPH07169375A - Installation method of reflector for photoelectric switch, and reflector for photoelectric switch - Google Patents

Abstract

PURPOSE:To maximize the surface area of a reflecting plate, make the reflecting plate compact, and surely install and fix the reflecting plate even in a narrow space. CONSTITUTION:A reflecting apparatus 11 is composed of a reflecting plate 12 and an installation part 13 installed in the back side of the plate. While a nut being inserted into a first nut insertion hole 15 in the side 13b of the installation part 13, a screw is inserted into a screw insertion hole 14 through a fixing part from the rear side 13a and screwed in the nut and thus the reflecting apparatus 11 is installed and fixed. While a nut being inserted into a second nut insertion hole 15 in the rear side 13a of the installation part 13, a screw is inserted into a screw insertion hole 16 through a fixing part from the rear side 13a and screwed in the nut. A screw is directly inserted into a screw insertion hole 16 to install the screw. Since the surface are of the reflecting plate 12 is not limited due to the installation and fixing, even if the reflecting apparatus is made compact, the decrease in the quantity of the reflected light is suppressed to the allowable maximum extent.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of mounting a reflector for a photoelectric switch, which is arranged in a state of facing a recursive photoelectric switch and reflects the light from its light emitting portion to guide it to a light receiving portion, and a reflector for the photoelectric switch. Regarding

[0002]

2. Description of the Related Art Conventionally, as a reflector for a recursive photoelectric switch, for example, there is one shown in FIG. That is, the reflector 1 is in the form of a rectangular flat plate having a size of about 5 cm square, and has a reflector plate 2 composed of a plurality of corner cubes on the front surface thereof, and a mounting hole 3 for screw insertion in the lower portion thereof. , 3 are formed.

This reflector 1 is fixed to a fixing portion 5 provided at a position facing the photoelectric switch 4 by inserting it into the mounting holes 3 and 3 with mounting screws 6 and 6. When there is no light shield A between the photoelectric switch 4 and the reflector 1, the light projected from the photoelectric switch 4 is reflected by the reflector 1 and reaches the light receiving portion of the photoelectric switch 4 again, and the light shield A
When the light projection is blocked by, the light shield A is detected when the reflected light to the photoelectric switch 4 disappears or decreases.

[0004]

By the way, in recent years,
As shown in FIG. 7, such a photoelectric switch 4 is further miniaturized, and a photoelectric switch 4 having a width dimension of about ten and several millimeters is also manufactured, and it can be arranged in a narrow place. However, there is no miniaturized reflector 1 used as a pair with this, and the installation space becomes large.

Therefore, for example, as shown in FIG. 8A, the mounting space can be reduced by making the size of the surface of the reflector 7 facing the reflection plate 7a, that is, the surface facing the photoelectric switch 4, substantially the same. Can be considered.

However, in this case, since the screw insertion holes 7b, 7b for mounting are located at the upper and lower ends of the reflector 7a, the area of the reflector 7a must be reduced. There is a problem that the amount of reflected light is reduced and the detection distance is shortened.

In addition, in this structure, the reflector 7 is attached.
Since it can be done only from the surface side of a and its degree of freedom is limited, there are cases where it is not possible to attach it depending on the installation location even though it can be attached dimensionally.

Further, in order to solve the above problems, for example,
As shown in FIG. 8 (b), the reflector 8a of the reflector 8 is disposed on the entire surface facing the photoelectric switch 4 to maximize the area of the reflector 8a, and the adhesive tape 8b or the like is attached to the rear side. It is conceivable to adhere and fix to the mounting and fixing part by.

However, in this case, for fixing by adhesion, depending on the environment of the installation site, for example, water,
There is a problem that the installation condition becomes unstable due to the adverse effect of oil or humidity and the product is dropped off, and the installation place is restricted.

The present invention has been made in view of the above circumstances, and an object thereof is not to provide a space for mounting on a surface facing a photoelectric switch, so that the area of a reflection plate can be maximized. An object of the present invention is to provide a reflector for a photoelectric switch which can be mounted with high flexibility and can be mounted reliably.

[0011]

DISCLOSURE OF THE INVENTION The present invention is provided with a reflecting plate which is arranged to face a recursive photoelectric switch and which reflects light from its light projecting portion to guide it to a light receiving portion, and which is provided on the back surface of this reflecting plate. A mounting method for a reflector for a photoelectric switch including a mounting member, wherein a screw is inserted into the mounting member from a back surface and a counterpart to be screwed with the mounting member is inserted from a side surface. It is characterized by selectively performing the case 1 and the second case in which a screw is inserted from the side surface and a mating partner to be screwed with the screw is inserted from the rear surface (claim 1).

Further, the present invention is directed to a photoelectric switch reflector which is arranged in a state of facing a recursive photoelectric switch and which reflects light from its light projecting portion and guides it to a light receiving portion.
A reflector plate for reflecting the light from the light projector and a mounting member provided on the back surface of the reflector plate are provided, and mounting screws can be inserted into the mounting member vertically from the back surface direction to the reflector plate. A screw insertion hole, and a mounting nut that is provided so that a mounting nut can be inserted from a side surface portion corresponding to the screw insertion hole, and the mounting nut can be arranged so as to be screwed with the mounting screw.
Nut insertion hole, a screw through hole through which the mounting screw can be inserted from the side direction, and the mounting nut is provided so that the mounting nut can be inserted from the back surface portion corresponding to the screw through hole portion, and the mounting nut is the mounting screw. It is characterized in that a second nut insertion hole that can be arranged so as to be screwed is provided (Claim 2).

[0013]

According to the method of mounting the reflector for a photoelectric switch according to the first aspect, when the first case is selected, a nut which is a counterpart to which a screw is inserted into the mounting member from the back side and screwed with the screw. Etc. can be fixed by inserting from the side, and when selecting the second case, insert the screw from the side into the mounting member and insert the nut etc. which is the mating partner from the back You will be able to fix it. As a result, in all cases, it is possible to securely mount all of the mounting members by fixing them from the back or side of the mounting member, and since the surface provided with the reflector does not require an area for mounting, reflection is possible. The area of the board is not limited.

According to the reflector for a photoelectric switch according to the second aspect of the present invention, the placement and fixing at the installation location is performed by the following three steps by the attachment member.
It can be attached in two ways.

First, the nut is previously inserted from the first nut insertion hole of the mounting member, and the mounting screw is inserted from the rear surface portion into the screw insertion hole through the fixing mounting plate or the like. The reflector is fixed to a mounting plate or the like by screwing the nut onto the screw.

Secondly, the nut is previously inserted from the second nut insertion hole of the mounting member, and the mounting screw is inserted from the side surface portion into the screw through hole through the mounting plate for fixing or the like. The reflector is fixed to a mounting plate or the like by screwing the nut onto the screw.

Thirdly, the reflector is fixed to the fixing portion by inserting a screw from the side surface of the mounting member into the screw through hole and screwing the screw into the fixing portion such as the mounting plate.

Since all of these three mounting modes are designed to be fixed by screws from the back surface or the side surface of the mounting member, the mounting can be ensured, and the surface provided with the reflection plate is for mounting. The area of the reflection plate is not limited because the area is not required. Therefore, the surface of the reflection plate can be formed by maximizing the area of the mounting portion, and the amount of light reflected by the recursive photoelectric switch is not reduced. Nor.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS.

In FIG. 1 showing the structure of a rectangular parallelepiped-shaped reflector 11, as shown in the front view of FIG. 1C, the reflector 12 has a large number of corner cubes formed on the inner surface side of transparent plastic. The reflex reflector is formed by reflecting the light incident from the outside a plurality of times inside and reflecting it in the same direction as the incident light.

Mounting member 1 located on the back side of the reflector 12
3 is configured as follows. That is, in the same figure (a) showing the back surface portion 13a, two screw insertion holes 14 and 14 are formed in the vertical position near the center portion in the vertical direction with respect to the reflection plate 12, and the screws can be inserted. ing.

Then, the side surface portions 13b and 13c of the mounting member 13 are respectively corresponding to the screw insertion holes 14 and 14, respectively.
(Fig. 1 (d) shows the right side surface 13b, and Fig. 1 (b) shows the left side surface 13b.
(showing c), convex first nut insertion holes 15, 15 are formed so as to penetrate the mounting member 13 in the lateral direction.

As shown in the enlarged view of FIG. 3A, the right side surface 13b of each of the first nut insertion holes 15 and 15 is a nut insertion side.
At the central portion of the, a stepped locking portion 15a is formed so as to prevent rotation when the nut is inserted (see the sectional view shown in FIG.

A ridge 15b is formed on the wall surface of the first nut insertion hole 15 along the insertion direction.
When the nut is inserted into the nut insertion hole 15, the nut does not tend to come off due to press-fitting.

Two screw through holes 16 and 16 penetrating in the direction perpendicular to the surfaces of the side surfaces 13b and 13c are formed in the vicinity of the upper and lower ends of the mounting member 13, respectively, so that the screw can penetrate therethrough. ing. Then, this screw through hole 16,
Corresponding to 16 respectively, the back surface portion 13a of the mounting member 13
The second nut insertion hole 1 in the direction perpendicular to the reflector 12 from the side.
7, 17 are formed.

As shown in an enlarged view in FIG. 2, the second nut insertion holes 17 and 17 are formed with locking portions 17a so that the nuts are prevented from rotating at the nut insertion position (see FIG. (See the cross-section shown in a)). In addition, the second nut insertion holes 17 and 17 are provided with a ridge 17b along the insertion direction of the inner wall surface, so that the nut does not tend to be pressed in and accidentally dropped when the nut is inserted. There is.

The reflector 11 having such a structure can be attached to the attaching portion in the following three modes. In this embodiment, the outer diameter of the reflector 11 is about 33 mm in the vertical direction and 12 mm in the horizontal direction.
The depth dimension is set to about 11 mm, and the vertical dimension and the horizontal dimension are set to be substantially the same as the light emitting / receiving surface of the photoelectric switch.

(1) First Mounting Mode (First Case) First, a first case will be described in which the fixing member 18 as shown in FIG.

The fixing member 18 is formed by integrally bending a horizontal plate portion 18a and a vertical plate portion 18b into an L shape by bending a metal plate or the like, and is used for fixing and fixing the reflector 11 and pairing with it. It is also possible to mount and fix the photoelectric switch that is used. In this fixing member 18, a long hole 19a is formed on one end side of the horizontal plate portion 18a, and an arcuate mounting hole 19b is formed on the other end side thereof. The vertical plate portion 18b has four holes in the central vertical direction. Screw insertion holes 20a to 20d are formed, and arcuate mounting holes 21a to 21d are formed at four corners.

Now, the mounting screws 22 and 22 and the nuts 23 and 23 as their counterparts are mounted as follows. That is, the nuts 23, 23 as the counterparts are inserted into the first nut insertion holes 15, 15 formed in the mounting member 13 of the reflector 11, and in this state, the screws 22, 22
Is inserted into the screw insertion holes 14, 14 of the mounting member 13 through the screw insertion holes 20b, 20c of the fixing member 18, respectively, and is screwed into the nuts 23, 23.

At this time, while the nuts 23, 23 are inserted in the nut insertion holes 15, 15, the locking portions 15a, 15
Since the rotation is stopped by a, the reflector 11 can be attached and fixed to the fixing member 18 by tightening the screws 22 and 22.

The fixing member 18 is attached and fixed to a horizontal mounting portion by inserting a screw (not shown) through the elongated hole 19a and the mounting hole 19b of the horizontal plate portion 18b.

(2) Second Mounting Mode (Second Case) As shown in FIG. 5, the side member 13 is formed by using the fixing member 18.
This is the second case of attachment from the b or 13c side.

In this case, the nut 2 as the other party
Reference numerals 3 and 23 are second portions formed on the mounting member 13 of the reflector 11.
Are inserted into the nut insertion holes 17, 17 of the fixing member 18, respectively.
It is inserted into the screw through holes 16, 16 of the mounting member 13 via 0a, 20d, respectively, and screwed with the nuts 23, 23.

At this time, the nuts 23, 23 are inserted into the nut insertion holes 17, 17 and the locking portions 17a, 1a.
Since the rotation is stopped by 7a, the reflector 11 can be attached and fixed to the fixing member 18 by tightening the screws 22 and 22.

(3) Third Mounting Mode As shown in FIG. 6, for example, in the case of directly mounting on the outer frame 24a of the roller conveyor 24 or the like, the above-mentioned fixing member 18 is used.
Is unnecessary.

In this case, the outer frame 24a as a mounting surface
The upper surface of the screw is tapped at a position corresponding to the screw through holes 17, 17, and the screws 22, 22 are screwed into the screw through holes 17,
Outer frame 24a tapped while being inserted through
It is to be screwed into.

According to this embodiment, the reflector 11
Are attached to the rear surface portion 13a, the side surface portions 13b, 13 of the mounting member 13.
Since it can be attached to the fixing member 18 from the c side by the screw 22 and the like and can be directly attached to the attachment surface portion from the side surface portions 13b and 13c side, even in a narrow place, the attachment method can be reliably selected from various attachment modes. Since the area of the reflection plate 12 that can be mounted and is opposed to the photoelectric switch is not limited by the mounting space, the area of the installation surface of the reflection plate 12 can be used to the maximum even when the overall size is reduced. Therefore, it is possible to suppress the decrease in the amount of reflected light with respect to the light projected from the photoelectric switch as much as possible.

In the above embodiment, the fixing member 18
Was also used as a fixing member for the photoelectric switch, but the reflector 11
A dedicated fixing member may be used so as to correspond to the size of the above, or it may be configured to be attached not only in the horizontal plate portion 18a but also in the vertical direction.

[0040]

As described above, according to the method of mounting a reflector for a photoelectric switch of the present invention, when the first case is selected, a screw is inserted from the back side of the mounting member and screwed with the screw. The mating counterpart nut or the like can be fixed by inserting it from the side surface, and when selecting the second case, it is the counterpart party that the screw is inserted from the side surface into the mounting member and screwed therewith. It becomes possible to fix it by inserting nuts from the back. As a result, in any case, all of the mounting members can be securely mounted by fixing them from the back or side of the mounting member, and the surface provided with the reflection plate does not require an area for mounting. It has an excellent effect that the area of the plate is not limited.

Further, according to the reflector for a photoelectric switch of the present invention, the first nut insertion hole and the screw insertion hole formed in the mounting member can be attached to the mounting plate or the like from the back surface portion, and the second nut insertion can be performed. The holes and the screw through holes can be attached to the mounting plate or the like from the side surface portion, and the screw through holes can be directly attached to the mounting surface. Therefore, even in a narrow place, an appropriate mode can be selected from various mounting modes and securely mounted, and all three mounting modes can be fixed by screws from the back surface or the side surface of the mounting member. Therefore, the area of the reflector plate facing the photoelectric switch can be used to the maximum, and therefore,
The excellent effect that the reduction of the reflected light amount with respect to the light projected from the photoelectric switch can be suppressed as much as possible is achieved.

[Brief description of drawings]

FIG. 1 is a diagram showing a back surface portion, a left side surface portion, a front surface portion, and a right side surface portion of the overall configuration showing an embodiment of the present invention.

FIG. 2 is an enlarged view showing a second nut insertion hole portion.

FIG. 3 is a view corresponding to FIG. 2 showing a first nut insertion hole portion.

FIG. 4 is a perspective view showing a first mounting mode.

FIG. 5 is a view corresponding to FIG. 4 showing a second mounting mode.

FIG. 6 is a view corresponding to FIG. 4 showing a third mounting mode.

FIG. 7 is a diagram showing a mounting mode of a conventional example.

FIG. 8 is a front view and a perspective view of the same miniaturized model.

[Description of Reference Signs] 11 is a reflector, 12 is a reflector, 13 is a mounting member, 14 is a screw insertion hole, 15 is a first nut insertion hole, 16 is a screw through hole, 17 is a second nut insertion hole, Reference numeral 18 is a fixing member.

Claims (2)

[Claims] 1. A reflection plate disposed opposite to the recursive photoelectric switch, which includes a reflection plate for reflecting light from a light projecting portion and guiding the light to a light receiving portion, and a mounting member provided on a back surface portion of the reflection plate. In the reflector for photoelectric switch, a first case in which a screw is inserted from the back side and is inserted into the mounting member with respect to the mounting member, and a other side is inserted into the mounting member from a side surface, and a screw is inserted from the side surface and is screwed into this A method for mounting a reflector for a photoelectric switch, which selectively performs the second case of inserting the other party from the back side. 2. A reflector for a photoelectric switch, which is arranged in a state of facing a recursive photoelectric switch and reflects the light from its light-projecting portion to guide it to a light-receiving portion, and a reflector for reflecting the light from said light-projecting body. A mounting member provided on the back surface of the reflection plate, wherein the mounting member corresponds to the screw insertion hole into which a mounting screw can be inserted vertically from the rear surface to the reflection plate, and the screw insertion hole portion. And a first nut insertion hole that is provided so that a mounting nut can be inserted from the side surface portion, and that the mounting nut can be arranged so as to screw with the mounting screw, and a screw through hole that allows the mounting screw to be inserted from the side surface direction. And a second nut insertion hole corresponding to the screw through hole so that the mounting nut can be inserted from the rear surface and the mounting nut can be arranged so as to be screwed with the mounting screw. Characteristic photoelectric switch Reflector.