JPH0714947Y2 - Photoelectric sensor fixture - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a photoelectric sensor mounting tool used for mounting a photoelectric sensor along a load transport path in a load transport system for transporting a load, for example.

[0002]

2. Description of the Related Art In a conventional load carrying system, as shown in FIG. 6, a large number of carrying rollers 1 are arranged in parallel to form a load carrying path, and each carrying roller 1 is driven by a drive mechanism to carry a load 2. The object is conveyed along the load conveying path to a target position. In order to control the flow of the load 2, a photoelectric sensor 3 composed of a light projector 4 and a light receiver 5 is provided at an appropriate position along the transport path,
When the light projector 4 and the light receiver 5 are opposed to each other to form an optical path 6 orthogonal to the conveying path, and the load 2 blocks the optical path 6,
It detects that the load 2 has passed.

In the example shown in FIG. 6, the load 2 has an appropriate thickness, and the projector 4 and the light receiver 5 are positioned at the height position corresponding to the thickness of the load 2. If the load 2 is a hollow body and its hollow hole faces the direction orthogonal to the transport path, the optical path 6 and the hollow hole are in the same direction, so the optical path 6 is not blocked and the load 2 A detection error may occur.

FIG. 7 shows an arrangement example of photoelectric sensors when the load 2 is a hollow body. In the example shown in the figure, two sets of photoelectric sensors 3A and 3B are arranged along the conveyance path 7, and the projector 4 and the light receiver 5 of one photoelectric sensor 3A are made orthogonal to the conveyance path 7 and the other. The light projector 4 and the light receiver 5 of the photoelectric sensor 3B are arranged so as to oppose the transport path 7 and face each other, and form a horizontal and straight optical path 6A and an optical path 6B having an angle in the horizontal direction.

FIG. 8 shows another arrangement example of the photoelectric sensor 3 when the load 2 is a hollow body. In the example shown in the figure, the light projector 4 of the photoelectric sensor 3 is arranged at a high position and the light receiver 5 is arranged at a low position so as to face each other, and an optical path 6 having an angle in the vertical direction is formed.

This is also the case when the load 2 is in the form of a thin plate as shown in FIG. 9, and the projector 4 and the light receiver 5 of the photoelectric sensor 3 are installed at different height positions, and are angled in the vertical direction. To form an optical path 6.

[0007]

As described above, it is necessary to determine the height and direction of the projector 4 and the light receiver 5 of the photoelectric sensor 3 according to the thickness of the load 2 to be detected and the presence / absence of hollow holes. Conventionally, since a photoelectric sensor attachment is manufactured according to the type of load 2 to be handled each time a transport system is constructed, it requires labor and cost to manufacture, and the position and orientation of the photoelectric sensor are adjusted. There is a problem that it takes time.

The present invention has been made in view of the above problem, and the height and direction of the photoelectric sensor can be freely set according to the object to be detected, and the position and orientation can be easily adjusted. The purpose is to provide.

[0009]

SUMMARY OF THE INVENTION A photoelectric sensor mounting member according to the present invention has an intermediate member connected to an upper end of a supporting shaft so that the intermediate member can freely rotate, and a photoelectric sensor can be mounted on an upper end of the intermediate member. Is tiltably connected, and a fixture for fixing the supporting shaft to the frame is provided on the supporting shaft so that the vertical position can be adjusted. A first fastening member for positioning and fixing the intermediate member at an arbitrary rotation angle position is provided between the support shaft and the intermediate member, and between the intermediate member and the mounting plate, A second stopper is provided for positioning and fixing the mounting plate at an arbitrary tilting angle position.

[0010]

[Function] The height of the photoelectric sensor is adjusted by vertically moving the fixture along the support shaft, and the horizontal inclination angle of the photoelectric sensor is adjusted by axially rotating the intermediate member to tilt the mounting plate. Thus, the tilt angle of the photoelectric sensor in the vertical direction is adjusted. As a result, the height and orientation of the photoelectric sensor can be freely set according to the detection target, and the position and orientation can be easily adjusted.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows a schematic structure of a load carrying device. A large number of carry rollers 1 are arranged in parallel at the same height to form a load carrying path, and a drive mechanism is connected to each carry roller 1. .
Bearings 10 are provided at intervals of rollers on the frames 8 and 9 on both sides.
1 rotatably supports.

A photoelectric sensor 3 is provided at a proper position along the conveyance path. The projector 4 of the photoelectric sensor 3 is arranged on one frame 8 and the light receiver 5 is arranged on the other frame 9 by means of a photoelectric sensor fitting 12. It is attached. The light projector 4
And the light receiver 5 are opposed to each other, and an optical path 6 orthogonal to the transport path is formed between the light projector 4 and the light receiver 5.

2 to 5 show the photoelectric sensor fixture 12 described above.
A configuration example of is shown. The photoelectric sensor fixture 12 of the illustrated example includes a support shaft 14 having a threaded portion 13 formed on the entire length of the peripheral surface, and an intermediate member 15 connected to the upper end of the support shaft 14 so as to freely rotate about the axis in the direction of arrow a. The intermediate member 15 is provided with a mounting plate 16 which is connected to the upper end of the intermediate member 15 so as to be tiltable in the direction of arrow b.

The intermediate member 15 has an inner surface on which the supporting shaft 1 is formed.
4 has a tubular portion 17 formed with a screw portion (not shown) to be screwed with the screw portion 13 of No. 4, and a support plate portion 18 integrally formed at the upper end of the tubular portion 17. A pair of upper and lower screw holes 19 and 20 are provided in the groove 17, and the screw holes 19 and 20 are provided.
The set screws 22 and 23 that form the first fastening member 21 are screwed in.

The first fastening member 21 is for positioning and fixing the intermediate member 15 at an arbitrary rotational angle position.
The rotation of the intermediate member 15 is allowed when the set screws 22 and 23 are loosened, and the rotation of the intermediate member 15 is restricted when the set screws 22 and 23 are tightened.

The support plate portion 18 of the intermediate member 15 is pivotally connected to the mounting plate 16 by a pivot shaft 24, and a screw hole 25 into which a second stopper 26, which is a set screw, is screwed into a position above the pivot shaft 24. Are formed.

The second fastening member 26 is used for positioning and fixing the mounting plate 16 at an arbitrary tilting angle position with respect to the support plate portion 18, and the mounting plate 16 has an arcuate hole 27 over an appropriate angle. To form the support plate portion 1 into the arc-shaped hole 27.
The second fastener 26 is inserted from the side opposite to the side 8 and is screwed into the screw hole 25 to restrict the tilting of the mounting plate 16.

The mounting plate 16 has a protective wall 28 whose upper end is bent, and serves as a mounting portion 29 for fixing the photoelectric sensor 3 with a screw on the plate surface below the protective wall 28. In the figure, reference numeral 30 is a light emitting / receiving unit of the photoelectric sensor 3.

A fixture 31 for fixing the support shaft 14 to the frames 8 and 9 is provided on the support shaft 14 so that the vertical position can be adjusted. In this embodiment, the fixture 3
A pair of nuts 32 and 33 is used as 1, and the support shaft 14 is inserted into the fixing holes formed in the frames 8 and 9, and the nuts 32 and 33 are vertically moved along the support shaft 14 in the direction of arrow c. The frames 8 and 9 are clamped between the nuts 32 and 33.

In order to arrange the photoelectric sensor 3 along the conveyance path by using the photoelectric sensor mounting member 12 having the above structure, the support shaft 14
After adjusting the height of the photoelectric sensor 3 by moving the nuts 32 and 33 of the fixture 31 up and down, the frames 8 and 9 are sandwiched between the nuts 32 and 33 to mount the photoelectric sensor mount 12 on the frame. Vertically installed on 8 and 9.

Next, each set screw 2 of the first fastening member 21
After adjusting the horizontal inclination angle of the photoelectric sensor 3 by loosening 2 and 23 and pivoting the intermediate member 15, the set screws 22 and 23 are tightened to fix the intermediate member 15 in the horizontal direction. .

Further, the second fastening member 26 is loosened to attach the mounting plate 1.
The tilt angle of the photoelectric sensor 3 in the vertical direction is adjusted by tilting 6, and then the second fastening member 26 is tightened to fix the vertical direction of the mounting plate 16. After setting the height and direction of the photoelectric sensor 3 according to the load to be detected in this way, fine adjustment is performed as necessary.

[0023]

As described above, according to the present invention, the height of the photoelectric sensor, the horizontal tilt angle, and the vertical tilt angle can be adjusted by the vertical movement of the fixture, the axial rotation of the intermediate member, and the tilting of the mounting plate. Since it is adjustable, the height and direction of the photoelectric sensor can be freely set according to the detection target, and the position and orientation can be easily adjusted. Further, since it is not necessary to manufacture a photoelectric sensor mounting tool for each load carrying system, the number of manufacturing steps can be reduced and the cost can be reduced.

[Brief description of drawings]

FIG. 1 is a front view showing a schematic configuration of a load carrying device.

FIG. 2 is a perspective view of a photoelectric sensor fixture according to the present invention.

FIG. 3 is a front view of the photoelectric sensor fixture of FIG.

FIG. 4 is a left side view of the photoelectric sensor fixture of FIG.

5 is a right side view of the photoelectric sensor fixture of FIG. 2. FIG.

FIG. 6 is a front view showing an arrangement example of photoelectric sensors.

FIG. 7 is a plan view showing an arrangement example of photoelectric sensors for detecting a load on a hollow body.

FIG. 8 is a front view showing another arrangement example of photoelectric sensors for detecting a load on a hollow body.

FIG. 9 is a front view showing an arrangement example of photoelectric sensors in the case of detecting a thin plate-shaped load.

[Explanation of symbols]

 3 Photoelectric Sensor 4 Emitter 5 Light Receiver 12 Photoelectric Sensor Mounting Tool 14 Support Shaft 15 Intermediate Member 16 Mounting Plate 21 First Fastening Tool 26 Second Fastening Tool 31 Fixing Tool

Claims (1)

[Scope of utility model registration request] 1. An intermediate member is rotatably connected to an upper end of a supporting shaft, and a mounting plate on which a photoelectric sensor can be mounted is tiltably connected to an upper end of the intermediate member, and the supporting shaft is provided on the supporting shaft. A fixture for fixing the support shaft to the frame is provided so that the vertical position can be adjusted, and a first member for positioning and fixing the intermediate member at an arbitrary rotation angle position between the support shaft and the intermediate member.
And a second fastening member for positioning and fixing the mounting plate at an arbitrary tilting angle position between the intermediate member and the mounting plate.