JP4464756B2 - Multi-optical axis photoelectric sensor mounting structure, mounting method, and mounting fixture used therefor - Google Patents

Description

  The present invention relates to a multi-optical axis photoelectric sensor mounting structure, a mounting method, and a mounting tool used therefor.

  For example, a multi-optical axis photoelectric sensor includes a projector in which a plurality of light projecting elements are arranged and a light receiver in which a plurality of light receiving elements that are paired with each of the plurality of light projecting elements are arranged in a predetermined detection region. The configuration is arranged in a state of being opposed to each other. If an object is present between the projector and the light receiver, the light emitted from the projector and directed toward the light receiver is blocked by the object, so that the light reception level at the light receiver is lower than when no object is present. Therefore, an object passing through the detection region can be detected by measuring the light reception level at the light receiver.

  By the way, in this kind of multi-optical axis photoelectric sensor, each main body case of the projector and the receiver is a pair of mounting plates having an L-shaped cross section provided at both ends thereof, as disclosed in Patent Document 1 below. Thus, the element can be attached to the attachment wall in a state of being rotatable around a rotation axis along the arrangement direction of the elements. This is to enable adjustment of the optical axis direction so that the light emitted from each light projecting element of the light projector is received by each light receiving element of the light receiver that is paired with the light projecting element when mounted on the mounting wall. is there.

  This mounting structure will be specifically described by taking the example of Patent Document 1 as an example. Of the L-shaped mounting plate, one wall portion disposed facing the end surface of the main body case has an insertion hole, An arc-shaped groove centering on the insertion hole is formed through. A pair of through-holes through which a fixing screw screwed to the mounting wall is passed are formed in the other wall portion facing the mounting wall. Then, through the mounting holes from the upper surface of the one wall part to the insertion hole and the groove part, respectively, the screw holes are formed in the screw holes formed on the end face of the main body case, and the fixing screws are passed through the pair of insertion holes in the other wall part. The main body case is fixed to the mounting wall by being screwed into the screw hole of the mounting wall. When adjusting the optical axis, loosen the mounting screw passed to the groove side, so that the body case can be rotated around the insertion hole, and when the optical axis adjustment is completed, the mounting screw is tightened again to adjust the optical axis. The direction is fixed.

JP-A-10-74433

According to the above structure, the adjustment operation regarding the rotation direction of the main body case is performed in a stepless manner, but such an adjustment method is effective for fine adjustment, but the adjustment amount is difficult to understand when performing coarse adjustment. There was room for improvement.
The present invention has been completed based on the above-described circumstances, and can be easily adjusted even when the adjustment angle is large. It is an object to provide a mounting tool.

  As means for achieving the above object, the invention of claim 1 is directed to a projector in which a plurality of light projecting elements are arranged in a longitudinal direction of the main body case, and to the main body case. A multi-optical axis photoelectric sensor configured to include a light receiver in which a light receiving element that is paired with each of the light projecting elements is arranged in another main body case that is disposed. In the mounting structure of the multi-optical axis photoelectric sensor that is attached to a predetermined mounting position by the support bracket provided on the intermediate case, an intermediate member is interposed between at least one end face of the main body case and the support bracket. In addition, between the intermediate member and the end surface of the main body case and between the intermediate member and the support metal fitting, the main body case or the A multi-stage positioning means capable of fixing the holding bracket at each reference angle with respect to the rotation direction centered on the axis along the longitudinal direction of the main body case is provided, and the main body case or the intermediate member is provided on the other side. It is characterized in that a stepless adjusting means is provided that can fix the support metal fitting at a desired position within a predetermined angular range with respect to the rotation direction about the axis.

  A second aspect of the invention is characterized in that, in the first aspect of the invention, the angle adjustment range by the stepless adjustment means is at least a reference angle of the multistage positioning means.

  According to a third aspect of the present invention, in the first or second aspect of the present invention, the multi-stage positioning means includes a concave-convex recessed portion formed between opposing surfaces of the main body case and the intermediate member. The concave portion and the convex portion are characterized in that the cross-sectional shape of the fitting portion forms a regular polygonal shape centered on the axis.

  According to a fourth aspect of the present invention, in any one of the first to third aspects, the main body case and the intermediate member have an indicator for each reference angle of the multistage positioning means. It is characterized by where it is provided.

  According to a fifth aspect of the present invention, in the method according to any one of the first to fourth aspects, the stepless adjustment means is provided on either the support bracket or the intermediate member, and a center line of the hole is provided. A guide hole having an arcuate shape centered on the axis, and a flange provided on the other side and fitted in the guide hole and capable of holding the member provided with the guide hole in a retaining state. It has a feature in that it consists of pins.

  According to a sixth aspect of the present invention, in the fifth aspect, the guide hole is provided in the intermediate member, and a screw seat portion is provided in a portion facing the guide hole in the support metal fitting. It is characterized in that it is configured such that the screw as the guide pin is screwed to the seat portion.

  According to a seventh aspect of the present invention, there is provided a projector in which a plurality of light projecting elements are arranged in a main body case along a longitudinal direction of the main body case, and each of the projectors in another main body case disposed to face the projector. A light receiving device in which light receiving elements that form a pair with the optical element are arranged, and the mounting structure according to any one of claims 1 to 6 makes the projector and the light receiving device a predetermined mounting location. A fixture of a multi-optical axis photoelectric sensor for mounting, characterized in that it includes the intermediate member and the support fitting.

  According to an eighth aspect of the present invention, there is provided a projector in which a plurality of light projecting elements are arranged in a main body case along a longitudinal direction of the main body case, and each of the projectors in another main body case arranged to face the projector. A light receiving device in which light receiving elements that form a pair with the optical element are arranged, and the mounting structure according to any one of claims 1 to 6 makes the projector and the light receiving device a predetermined mounting location. A mounting method of the multi-optical axis photoelectric sensor to be mounted, and performing the setting operation of the fixed position in the rotation direction by the multi-stage positioning means prior to mounting the projector and the light receiver at a predetermined mounting location, The step of adjusting the fixed position in the rotation direction by the stepless adjustment means is performed after the projector and the light receiver are mounted at predetermined mounting locations, and the optical axis of the light projector and the light receiver is adjusted. With a butterfly.

<Invention of Claims 1, 7, 8>
According to the first, seventh, and eighth aspects of the invention, in order to make the projector and the light receiver face each other, the orientation of the main body case is roughly adjusted by the multi-stage positioning means and then finely adjusted by the stepless adjustment means. Well, even when the adjustment angle with respect to the mounting location is large, the optical axis adjustment operation can be performed easily and easily.

<Invention of Claim 2>
According to the invention of claim 2, the main body case of the projector and the light receiver can be continuously adjusted (finely adjusted) over the entire 360 degrees.

<Invention of Claim 3>
According to the invention of claim 3, since the multi-stage positioning means has a regular polygonal cross section utilizing an uneven fitting structure, the structure is simple.

<Invention of Claim 4>
According to the invention of claim 4, the operator can know the adjustment angle (coarse adjustment angle) by viewing the indicator.

<Invention of Claim 5>
According to the invention of claim 5, the stepless adjusting means is constituted by a guide hole and a guide pin. Therefore, the number of parts dedicated to the adjusting means can be reduced (only the guide pins).

<Invention of Claim 6>
According to the invention of claim 6, since the screw serves both as a fixing function between the intermediate member and the support fitting and a guide function regarding the rotation direction, the structure becomes simple.

<First Embodiment>
A first embodiment of the present invention will be described with reference to FIGS.

  Reference numeral 10 shown in FIG. 1 denotes a multi-optical axis photoelectric sensor, which includes a projector 12, a light receiver 13, and a fixture 20 for mounting them on a work table S. The projector 12 is disposed sideways at the front end of the work table S. On the other hand, the light receiver 13 is disposed sideways in the same manner as the projector 12 in the upper portion of the hood (box shape opening forward) Sa disposed on the back side of the work table S. The projector / receivers 12 and 13 are aligned so that they face each other (optical axis adjustment). If an object exists between the two, the light emitted from the projector 12 and directed toward the receiver 13 is blocked by the object. For this reason, the light receiving level at the light receiver 13 is lower than when no object is present. Therefore, it is possible to detect the presence or absence of an object (such as an operator's hand) passing through the detection region by measuring the amount of light received by the light receiver 13. Hereinafter, these configurations will be described by taking the projector 12 side as an example.

  As shown in FIG. 2, the projector 12 is configured by accommodating, for example, a projector unit 15 in which six projector elements 11 are arranged in a line in a U-shaped main body case 14. The light projecting unit 15 includes a housing case 16 having a light projecting window (blocked by a light transmitting member) 16A opened on one side surface. In the housing case 16, the light projecting element 11 is housed in a state facing the light projecting window 16A. An optical axis adjusting indicator lamp 19 is provided at one end of the light projecting unit 15 (the right end in FIG. 2). The indicator lamps 19 are turned on (lighted) when all of the light receiving elements receive light from the corresponding light projecting elements, and are otherwise turned off (lighted off) or turned on according to the light receiving state of the light receiving elements. It is like that.

  A pair of cap members 17A and 17B are fitted to both open ends of the main body case 14. The cap members 17A and 17B are formed in a block shape, and an attachment 20 described below is attached to each end surface thereof. In the following description, the central axis along the longitudinal direction of the main body case 14 is defined as an axis L (see FIGS. 2 and 3).

  As shown in FIG. 3, the fixture 20 includes a first bracket 30 fixed to the cap members 17A and 17B and a second bracket fixed to the work table S (corresponding to the support bracket of the present invention). 50 and an intermediate metal fitting (corresponding to the intermediate member of the present invention) 40 interposed between both metal fittings 30 and 50.

  The first metal fitting 30 has a flat plate shape and is disposed so as to face the end surfaces of the cap members 17A and 17B. A fixing portion 37 is provided at the lower portion of the first metal fitting 30 so as to protrude toward the cap members 17A and 17B (see FIGS. 4 and 7). The fixing portion 37 is L-shaped and has a vertical hole 38 with a screw hole 38A. On the other hand, a pair of depressions 18A and 18B are formed on the left and right sides of the lower end face of the cap members 17A and 17B. The fixing portion 37 is adapted to be fitted into the left recess 18A in FIG. 4, and a screw hole 19 is formed in the left and right direction on the wall surface of the inner wall of the recess 18A facing the vertical wall 38 of the fixing portion 37. Is provided.

  When the fixing portion 37 is fitted to the recess 18A, the screw holes 38A and 19 are aligned with each other. By screwing from the state, the first metal fitting 30 is attached to the cap members 17A and 17B. It can be fixed in a locked state. Further, a cylindrical portion 31 for bearing is provided at the center portion of the first metal fitting 30 so as to protrude in the direction opposite to the cap members 17A and 17B. A screw is cut on the inner peripheral side of the cylindrical portion 31, and an intermediate fitting fixing member described below is screwed.

  The intermediate metal fitting 40 includes a fan-shaped main body 41 having a through hole 41A in the central portion, and peripheral walls 45 and 48 provided on the outer periphery thereof. The intermediate metal fitting 40 is fixed to the first metal fitting 30 by screwing the main body 41 in a state of facing the first metal fitting 30. A plurality of 40 relative angles (angles about the axis L) can be selected step by step. More specifically, a convex portion 43 that protrudes toward the first metal fitting 30 is formed on the intermediate metal fitting 40 side of the opposing surfaces of both metal fittings 30 and 40, while the first metal fitting 30 has the protrusions described above. A recess 33 is formed at a position facing the portion 43. The convex portion 43 and the concave portion 33 can be fitted with concaves and convexes, and both the cross-sectional shapes of the fitting portions are regular dodecagons with the cylindrical portion 31 as the center (see FIGS. 7 and 8). For this reason, the mounting angle (the angle about the axis L) of the first metal fitting 30 and the intermediate metal fitting 40 can be changed at a 30-degree pitch (corresponding to the reference angle of the present invention). The concave portion 33 and the convex portion 43 correspond to the multistage positioning means of the present invention.

  Further, as shown in FIG. 8, a circular step portion 42 is provided in the center of the convex portion 43, and the protruding end of the cylindrical portion 31 is fitted therein. With such a configuration, rattling that occurs between the first metal fitting 30 and the intermediate metal fitting 40 is suppressed.

  In addition, as shown in FIG. 4, in the first metal fitting 30, twelve labels (corresponding to the indicator of the present invention) 34 are provided on the plate surface at equal intervals in the circumferential direction, while the upper part of the peripheral wall 48 of the intermediate metal fitting 40. Is provided with an alignment slit 49, and the mounting angle between the first metal fitting 30 and the intermediate metal fitting 40 can be determined by observing which direction the slit 49 faces (which tachin is facing). It can be confirmed. In the present embodiment, the uppermost take-in 34a in FIG. 4 serves as a reference take-up, and the take-in 34a and the alignment slit 49 coincide (the state shown in FIG. 10A). Is set so that the light projecting element accommodated in the main body case 14 faces the horizontal direction (the light from the light projecting element is emitted in the horizontal direction).

  As shown in FIG. 4, the peripheral wall includes a connecting portion 45 having an arcuate surface centering on the through hole 41 </ b> A, and a reinforcing portion 48 that is continuous with the connecting portion 45 and is formed along the outer periphery of the main body portion 41. Is done. The connecting portion 45 is set to have a protruding height from the main body portion 41 higher than the protruding height of the reinforcing portion 48, and a guide hole 46 is formed at a central portion in the protruding direction. The guide hole 46 is formed in a horizontal direction in FIG. 4, and its center line has an arc shape centering on the through hole 41A.

Next, the second metal fitting 50 will be described. The second metal fitting 50 is formed by projecting a seat portion (corresponding to the screw seat portion of the present invention) 55 with respect to the connection portion 45 on a mounting plate 51 having a flat plate shape.
As shown in FIG. 4, a pair of left and right mounting holes 52 for the work table S are formed on the left and right sides of the mounting plate 51. Each of these attachment holes 52 is a long hole along the axis L. On the other hand, the seat portion 55 is in the center portion of the second metal fitting 50 in the width direction, and its upper surface (the surface facing the connection portion 45) is a support surface 56, which is the curvature of the outer surface of the connection portion 45. And a screw hole 56A is formed in the central portion thereof.

Therefore, when the connection portion 45 is abutted on the seat portion 55, the support surface 56 and the outer surface of the connection portion 45 come into close contact with each other, and the fastening collar 61 is applied to the inner peripheral side of the connection portion 45 from this state. The intermediate bracket 40 is tightened with a screw (corresponding to a guide pin of the present invention) 63 passing through the guide hole 46 in a state (a state in which the connecting portion 45 is sandwiched between the collar 61 and the seat portion 55). And the second metal fitting 50 can be fixed. The collar 61 is a smooth surface with a flat upper surface, while the lower surface is a curved surface that follows the inner surface of the connecting portion 45.
Further, the screw head 63a of the screw 63 corresponds to the flange of the present invention.

By the way, as described above, the center line of the guide hole 46 has an arc shape centering on the through hole 41A. Accordingly, when the intermediate fitting 40 is rotated around the axis L with the screw 63 loosened, the screw 63 moves relative to the inside of the guide hole 46, and the support surface 56 and the outer surface of the connecting portion 45, and the inner surface of the connecting portion 45. The outer surface of the collar 61 (the lower surface in FIG. 4) serves as a slidable contact surface, and the intermediate fitting 40 swings about the axis L with respect to the second fitting 50. Then, when the rocker is swung to a desired position, the rocking angle θ (see FIG. 10) of the intermediate metal fitting 40 with respect to the second metal fitting 50 can be adjusted steplessly by screwing again. (Corresponds to the stepless adjustment means of the present invention).
Further, the groove end 46A of the guide hole 46 serves as a stopper, and further swinging operation is restricted when the screw 63 hits the groove end 46A. In the present embodiment, the intermediate fitting 40 has an adjustment angle of 15 degrees in the left-right direction from the position (A) in FIG.

  As shown in FIG. 4, the support surface 56 is formed with guide grooves 57 along the swinging direction of the intermediate fitting 40 on both sides of the screw hole 56A, and on the outer surface of the connecting portion 45 of the intermediate fitting 40. A rail 47 that can be fitted into the guide groove 57 is projected. These guide grooves 57 and rails 47 function to guide the swinging movement of the intermediate metal fitting 40.

Next, the operation and effect of this embodiment will be specifically described.
In order to attach the light projector 12 and the light receiver 13 to the work table S, the set angle of the main body case 14 in advance (the angle indicated by θ1 shown in FIG. 5 so that the light projecting element and the light receiving element face each other). Based on this, the intermediate metal fitting 40 and the first metal fitting 30 are positioned by multi-stage positioning means. For example, when θ1 is 32 degrees, the concave portion 33 and the convex portion 43 are fitted so that the alignment slit 49 coincides with the take-in 34b shifted by one step from the reference take-in 34a (see FIG. 11). What is necessary is just to screw the 1st metal fitting 30 and the intermediate metal fitting 40 in the state.

  On the other hand, the intermediate metal fitting 40 and the second metal fitting 50 may be fixed either before or after the positioning work of the intermediate metal fitting 40 and the first metal fitting 30, and the connecting portion 45 is sandwiched between the collar 61 and the seat portion 55. Then, the screw 63 may be tightened while passing through the guide hole 46.

  Thus, when the assembly work of the fixture 20 is completed, the fixing portion 37 is fitted into the recess 18A while the first metal fitting 30 is directed to the end faces of the cap members 17A and 17B of the projector 12, and screwed. As a result, the first metal fitting 30 and thus the fixture 20 are fixed to the projector 12 while being prevented from rotating. When the fixture 20 is assembled to the left and right cap members 17A and 17B, the projector 12 is placed on the work table S so that the second metal fitting 50 faces the work S, and in this state, the second The metal fitting 50 is screwed to the work table S. Thereby, the attachment of the projector 12 to the work table S is completed. Subsequently, the light receiver 13 is assembled according to the same procedure as that of the projector 12.

  In this state, the angle adjustment for 30 degrees has already been performed by the multi-stage adjusting means, so that the projector / receivers 12 and 13 are almost opposed to each other. Fine adjustment is performed by a stepless adjustment means so that the light emitting / receiving devices 12 and 13 face each other. For this purpose, the screw 63 is loosened on both the projector 12 side and the light receiver 13 side, and the main body case 14 is pushed in the rotating direction from that state.

  Then, the screw 63 moves relative to the inside of the guide hole 46, and the support bracket 56 and the outer surface of the connecting portion 45, and the inner surface of the connecting portion 45 and the outer surface of the collar 61 become a sliding contact surface, so that the intermediate metal fitting 40 is second. It swings around the axis L with respect to the metal fitting 50. As a result, the entire body case 14 rotates about the axis L. Then, the projector / receivers 12 and 13 are rotated about twice, and the turning of the main body case 14 is stopped after confirming that the indicator lamp 19 is turned on. Thereafter, the optical axis adjustment is completed by screwing again.

  As described above, according to the present embodiment, in addition to the stepless adjustment means, the multistage positioning means is provided, so that even if the adjustment angle is large, fine adjustment can be reduced and adjustment work is simple. And it can be done easily.

  That is, when the detection area (protection area) is formed obliquely by the multi-optical axis photoelectric sensor 10 as shown in FIG. 1, the main body case 14 is tilted by a predetermined angle so that the projector 12 and the light receiver 13 face each other. However, the magnitude of the inclination angle θ1 can be calculated from the mounting arrangement of the multi-optical axis photoelectric sensor 10 with respect to the work table S or the like.

  Therefore, prior to mounting the multi-optical axis photoelectric sensor 10 on the work table S, if the coarse adjustment is performed by the multi-stage positioning means of the present invention, the projector 12 and the light receiver 13 face each other after mounting. Only fine adjustment may be performed by the stepless adjustment means. With such a configuration, the troublesome adjustment of the optical axis, which has been a problem in the past (when a large angle adjustment is forced by a stepless adjustment mechanism, rough adjustment is made depending on the sense, and then fine adjustment is performed. Will take longer to complete the adjustment).

Further, since the adjustment angle range by the stepless adjustment means is set to an angle (30 degrees) equal to the adjustment angle per stage of the multistage positioning means, the body case 14 is continuously adjusted at any position of 360 degrees. (Fine adjustment)
In addition, the multi-stage positioning means uses a concave-convex fitting structure, and the fitting portion has a regular polygonal cross section, so that the structure is simple and the manufacturing cost can be reduced. The stepless adjustment means is constituted by a guide hole 46 and a guide pin (screw 63). Therefore, it is not necessary to provide a dedicated part for the adjusting means, and the number of parts can be reduced.

<Embodiment 2>
Next, Embodiment 2 of the present invention will be described with reference to FIG.
In the first embodiment, the multi-stage positioning means is constituted by the concave portion 33 and the convex portion 43 in which the shape of the fitting portion is a regular polygon. In the second embodiment, the positioning means is constituted by a plurality of protrusions 81 and the receiving groove 71. is doing. Specifically, a plurality of protrusions 81 are radially formed at equal intervals around the axis L on the intermediate metal fitting 80. On the other hand, a plurality of receiving grooves 71 are provided on the first metal fitting 70 side at positions facing the protrusions 81. Since other configurations are the same as those in the first embodiment, a duplicate description will be omitted.

<Other embodiments>
The present invention is not limited to the embodiments described with reference to the above description and drawings. For example, the following embodiments are also included in the technical scope of the present invention, and further, within the scope not departing from the gist of the invention other than the following. Various modifications can be made.

  (1) In the first embodiment, the multistage positioning means is provided between the first metal fitting 30 and the intermediate metal fitting 40, while the stepless adjustment means is provided between the intermediate metal fitting 40 and the second metal fitting 50. While a stepless adjustment means is provided between the first metal fitting 30 and the intermediate metal fitting 40, a multistage positioning means may be provided between the intermediate metal fitting 40 and the second metal fitting 50.

  (2) In Embodiment 1, the fixture 20 is constituted by the first metal fitting 30, the intermediate metal fitting 40, and the second metal fitting 50. However, the first metal fitting 30 may be eliminated. In this case, the intermediate fitting 40 is configured to be attached to the end faces of the cap members 17A and 17B, and a multi-stage positioning means may be provided between the intermediate fitting 40 and the end faces of the cap members 17A and 17B.

  (3) In the first embodiment, the concave portion 33 is provided on the first metal fitting 30 side, while the convex portion 43 is formed on the intermediate metal fitting 40 side. While providing a convex part in the 1st metal fitting 30 side, you may provide a recessed part in the intermediate metal fitting 40 side. Further, the shape of the fitting portion may be a regular polygon.

The perspective view which shows the attachment state of the multi-optical axis photoelectric sensor in Embodiment 1. FIG. Front view of the projector Perspective view of fixture Exploded perspective view of fixture Diagram showing optical axis adjustment operation Cross section of fixture The figure which shows the 1st metal fitting (A) Top view (B) Front view (C) Left side view (D) Rear view The figure which shows an intermediate metal fitting (A) Rear view (B) Plan view (C) Front view (D) Side view The figure which shows the 2nd metal fittings (A) Top view (B) Front view (C) Side view Diagram showing swing movement of intermediate bracket Front view showing a state in which the angle of the main body case is adjusted by multi-stage positioning means The figure which shows the structure of the multistage positioning means in Embodiment 2.

Explanation of symbols

20 ... Mounting tool 30 ... First metal fitting 40 ... Intermediate metal fitting 50 ... Second metal fitting

Claims (8)

A light projector in which a plurality of light projecting elements are arranged in the main body case along the longitudinal direction of the main body case, and a pair of the light projecting elements in another main body case arranged opposite to the main body case. A multi-optical axis photoelectric sensor that includes a multi-optical axis photoelectric sensor configured to include a light receiver in which light-receiving elements are arrayed, and is attached to a predetermined mounting position by support brackets provided on both end surfaces of the main body case in the array direction. In the mounting structure,
An intermediate member is interposed between the end face of at least one of the both end faces of the main body case and the support fitting,
Between one of the intermediate member and the end surface of the main body case and between the intermediate member and the support bracket,
A multi-stage positioning means capable of fixing the main body case or the support fitting to the intermediate member at each reference angle with respect to a rotation direction centering on an axis along the longitudinal direction of the main body case is provided,
On the other side, there is provided a stepless adjustment means capable of fixing the main body case or the support bracket to the intermediate member at a desired position within a predetermined angular range with respect to the rotation direction about the axis. A mounting structure for a multi-optical axis photoelectric sensor. The multi-optical axis photoelectric sensor mounting structure according to claim 1, wherein the angle adjustment range by the stepless adjustment means is at least equal to or larger than a reference angle of the multistage positioning means. The multi-stage positioning means is composed of concave and convex portions that are formed between the opposing surfaces of the main body case and the intermediate member, and the concave and convex portions can be fitted into the concave and convex portions. The multi-optical axis photoelectric sensor mounting structure according to claim 1 or 2, wherein the cross-sectional shape is a regular polygonal shape centered on the axis. The multi-piece according to any one of claims 1 to 3, wherein an indicator is provided for each reference angle of the multi-stage positioning means on either the main body case or the intermediate member. Mounting structure of optical axis photoelectric sensor. The stepless adjustment means is provided in either the support fitting or the intermediate member, and the center line of the hole forms a circular arc centered on the axis, and
A guide pin provided with a flange which is provided on the other side and is fitted in the guide hole and can hold the member provided with the guide hole in a retaining state. 5. A mounting structure of the multi-optical axis photoelectric sensor according to 4. While the guide hole is provided in the intermediate member, a screw seat portion is provided in a portion of the support metal fitting facing the guide hole, and a screw serving as the guide pin is screwed to the screw seat portion. The multi-optical axis photoelectric sensor mounting structure according to claim 5, wherein the structure is configured as described above. A light projector in which a plurality of light projecting elements are arranged in the main body case along the longitudinal direction of the main body case, and a light reception paired with each of the light projecting elements in another main body case arranged to face the light projector A multi-optical axis photoelectric for mounting the light projector and the light receiver at a predetermined mounting position by the mounting structure according to any one of claims 1 to 6. A multi-axis photoelectric sensor fixture, comprising: a sensor fixture comprising the intermediate member and the support fitting. A light projector in which a plurality of light projecting elements are arranged in the main body case along the longitudinal direction of the main body case, and a light reception paired with each of the light projecting elements in another main body case arranged to face the light projector A multi-optical axis photoelectric sensor for mounting the light projector and the light receiver at a predetermined mounting position by using the mounting structure according to any one of claims 1 to 6. Mounting method,
Prior to mounting the light projector and the light receiver at a predetermined mounting location, the fixed position setting operation in the rotation direction by the multi-stage positioning means is performed,
The adjustment of the fixed position in the rotation direction by the stepless adjustment means is performed after the projector and the light receiver are mounted at predetermined mounting locations, and the optical axis of the light projector and the light receiver is adjusted. Mounting method of the optical axis light sensor.

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