JP2007123200A - Middle part holding structure of multi-optical axis photoelectric sensor, and middle part holding member of multi-optical axis photoelectric sensor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a middle part holding structure of a multi-optical axis photoelectric sensor and a middle part holding member of the multi-optical axis photoelectric sensor having a constitution excellent in mounting workability. <P>SOLUTION: A protrusion 75 engaging with a middle part holding part 80 is formed on an outer face of a main body case 70 of the multi-optical axis photoelectric sensor 10 which is different from the face on which a light axis is formed. An engaging part 93 of an engaging member 90 is constituted so as to shift from a releasing position released from engagement to an engaging position engaging with the engaging member by a relative rotation against the protrusion 75. Rotation of the engaging part 93 against the protrusion 75 is regulated by end part fixtures 20, 20 and a base part 100 fixed to a fixing face in a state that the engaging part 93 is engaged with the protrusion 75, and the middle part of the main body case 70 is held in engaged state. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an intermediate part holding structure for a multi-optical axis photoelectric sensor and an intermediate part holding member for a multi-optical axis photoelectric sensor.

  Conventionally, the projector includes a projector in which a plurality of light projecting elements are arranged in a storage case, and a light receiver in which a plurality of light receiving elements that are paired with the light projecting elements are arranged. A multi-optical axis photoelectric sensor that detects an object passing through a detection area by arranging a light receiver facing each other with a predetermined detection area interposed therebetween is known (Patent Document 1). In this case, each housing case on the light projecting and light receiving side is fixed to a required mounting portion by a pair of mounting plates having an L-shaped cross section provided at both ends thereof.

JP-A-10-74433

  By the way, the multi-optical axis photoelectric sensor as described above has an increased length of the storage case as the detection area is expanded (with an increase in the number of channels of the light projecting / receiving elements). Then, there are cases where the storage case cannot be held sufficiently. In such a case, it is effective to arrange the intermediate fitting in the longitudinal direction so that the support of the storage case is stable even if the total length of the storage case is long. However, as such a configuration of the intermediate bracket, for example, a pair of holding pieces that sandwich the left and right side surfaces of the storage case are provided, and tightened so that the opposing distance between the two holding pieces is adjusted by an operation from the side of the storage case. Conceivable. For example, the structure which arrange | positions the screw laterally to the side of the holding piece of one side, and narrows the opposing space | interval of a holding piece by closing this screw from the side etc. is mentioned.

  However, in the above structure, a plurality of holding pieces must be fixed to the mounting surface, and the mounting work is troublesome. In addition, a space for fixing a plurality of holding pieces must be secured on the mounting surface, and there is room for improvement.

  This invention is completed based on the above situations, Comprising: It aims at providing the structure which is excellent in attachment workability | operativity.

As means for achieving the above object, the invention of claim 1
The multi-optical axis photoelectric sensor of the multi-optical axis photoelectric sensor, comprising a longitudinal main body case that accommodates photoelectric elements constituting a plurality of optical axes therein, wherein both longitudinal ends of the main body case are attached to an attachment surface via end fixing members. An intermediate part holding structure of a multi-optical axis photoelectric sensor that holds and holds an intermediate part in the longitudinal direction by an intermediate part holding member,
The main body case has an engaged portion that is engaged with the intermediate holding member on an outer surface different from a surface on which the optical axis is configured,
The intermediate holding member includes a base portion fixed to the mounting surface, and an engaging portion that is configured integrally with the base portion and engages with the engaged portion,
The engaging portion rotates relative to the engaged portion about an engaging operation rotation axis that intersects the longitudinal direction, thereby disengaging the engaged portion from the released position. It is configured to displace to an engagement position that engages with the engagement member,
The engagement portion and the engaged portion are engaged with each other, and the end fixing member and the base portion are attached to an attachment surface, so that the engagement portion is relative to the engaged portion. Rotation is restricted, and the intermediate part of the main body case is held in an engaged state with the intermediate part holding member.

The invention of claim 2 is the intermediate part holding structure of the multi-optical axis photoelectric sensor according to claim 1,
The intermediate holding member is formed by sheet metal processing.

The invention of claim 3
The multi-optical axis photoelectric sensor of the multi-optical axis photoelectric sensor, comprising a longitudinal main body case that accommodates photoelectric elements constituting a plurality of optical axes therein, wherein both longitudinal ends of the main body case are attached to an attachment surface via end fixing members. An intermediate part holding structure of a multi-optical axis photoelectric sensor that holds and holds an intermediate part in the longitudinal direction by an intermediate part holding member,
The main body case has an engaged portion that engages with the intermediate holding member on an outer surface different from a surface on which the optical axis is configured,
The end fixing member holds the main body case so as to be rotatable about an optical axis adjusting rotation shaft configured substantially parallel to the longitudinal direction,
The intermediate holding member is
An engaging member formed integrally with a base and an engaging part that engages with the engaged part;
A base member that holds the base portion of the engaging member so as to be rotatable about an optical axis adjusting rotation shaft configured substantially parallel to the longitudinal direction;
Have
The engaging portion rotates relative to the engaged portion about an engaging operation rotation axis that intersects the longitudinal direction, thereby disengaging the engaged portion from the released position. It is configured to displace to an engagement position that engages with the engagement member,
The engagement portion and the engaged portion are engaged with each other, and the end fixing member and the base portion are attached to an attachment surface, so that the engagement portion is relatively relative to the engaged portion. Rotation is restricted, and the intermediate part of the main body case is held in engagement with the intermediate part holding member.

The invention of claim 4 is the intermediate part holding structure of the multi-optical axis photoelectric sensor according to claim 3,
The engaging member is formed by sheet metal processing.

The invention of claim 5 is the intermediate part holding structure of the multi-optical axis photoelectric sensor according to claim 3 or claim 4,
The end portion fixing member and the intermediate portion holding member are arranged so that the position of the rotation axis for adjusting the optical axis substantially coincides with the position of the outer surface of the optical unit that forms the optical axis. It is characterized by that.

The invention of claim 6 is the intermediate part holding structure of the multi-optical axis photoelectric sensor according to any one of claims 3 to 5,
The multi-optical axis photoelectric sensor has a front surface on which the optical axis is configured, a pair of side surfaces, and a back surface configured on the opposite side of the front surface,
The engaged portion is formed at a corner between the side surface and the back surface, and the base member is an extension of the optical axis in a state where the engaged portion is arranged at the center in the rotation direction. It is configured not to cross the line.

The invention of claim 7 is the intermediate part holding structure of the multi-optical axis photoelectric sensor according to claim 6,
The engaged portions are formed at a plurality of corners, and the engaging members are engaged with the engaged portions, respectively.

The invention of claim 8 is the intermediate part holding structure of the multi-optical axis photoelectric sensor according to any one of claims 1 to 7,
The engaged portion comprises a ridge that extends in the longitudinal direction and protrudes outwardly,
The engaging portion includes a pair of claw-shaped portions that are located on both sides in a direction intersecting the ridge and sandwich the ridge from both sides,
The protrusion has, in a cross section perpendicular to the longitudinal direction, a small width portion on the base end portion side connected to the main body portion of the main body case, and a large portion on the tip end portion side having a width wider than the small width portion. The distance between the two claw-shaped portions is larger than the width of the large portion, and the distance between both the claw-shaped portions is smaller than that of the large portion.

The invention of claim 9 is the intermediate part holding structure of the multi-optical axis photoelectric sensor according to any one of claims 1 to 8,
The base is formed with a convex portion whose tip is in contact with the outer surface of the engaged portion when the engaging portion and the engaged portion are in an engaged state.

The invention of claim 10 is the intermediate part holding structure of the multi-optical axis photoelectric sensor according to claim 9,
The convex portion is provided in the center between the pair of claw-shaped portions.

The invention of claim 11 is the intermediate part holding structure of the multi-optical axis photoelectric sensor according to claim 9 or 10,
The convex portion has a hemispherical shape.

The invention of claim 12 is the intermediate part holding structure of the multi-optical axis photoelectric sensor according to any one of claims 1 to 11,
At least one of the engaging portion and the engaged portion is formed with a tapered portion that presses the other when the engaging portion and the engaged portion are engaged.

The invention of claim 13
An intermediate of a multi-optical axis photoelectric sensor having a longitudinal main body case that accommodates photoelectric elements constituting a plurality of optical axes, and having both longitudinal ends of the main body case attached to an attachment surface via end fixing members An intermediate holding member for holding the part,
The intermediate holding member is integrally formed with an engaging portion that engages with an engaged portion that is engaged with an outer surface different from a surface of the main body case on which the optical axis is configured. A base formed and attached to the mounting surface,
The engaging portion rotates relative to the engaged portion about an engaging operation rotation axis that intersects the longitudinal direction, thereby disengaging the engaged portion from the released position. It is configured to displace to an engagement position that engages with the engagement member,
The engagement portion is engaged with the engaged portion of the multi-optical axis photoelectric sensor fixed to the attachment surface by the end fixing member, and the base portion is attached to the attachment surface, The relative rotation of the engaging part with respect to the engaged part is restricted.

The invention of claim 14
An intermediate of a multi-optical axis photoelectric sensor having a longitudinal main body case that accommodates photoelectric elements constituting a plurality of optical axes, and having both longitudinal ends of the main body case attached to an attachment surface via end fixing members An intermediate holding member for holding the part,
An engaging portion that engages with an engaged portion that is engaged with an outer surface different from a surface on the side where the optical axis is formed in the main body case, and a base portion that is formed integrally with the engaging portion; An engagement member comprising:
A base member that holds the base portion of the engagement member so as to be rotatable about an optical axis adjusting rotation shaft configured substantially parallel to the longitudinal direction;
Have
The engaging portion rotates relative to the engaged portion about an engaging operation rotation axis that intersects the longitudinal direction, thereby disengaging the engaged portion from the released position. It is configured to displace to an engagement position that engages with the engagement member,
The engaging portion is engaged with the engaged portion of the multi-optical axis photoelectric sensor fixed to the attachment surface by the end fixing member, and the base portion holding the engaging member is attached. By being attached to a surface, the relative rotation of the engaging portion with respect to the engaged portion is restricted.

<Invention of Claims 1 and 13>
According to the first and thirteenth aspects of the invention, the number of intermediate holding parts can be effectively reduced, and the structure is excellent in workability when attaching and detaching.

<Invention of Claim 2>
According to the invention of claim 2, the manufacturing cost of the intermediate holding component can be effectively reduced.

<Invention of Claims 3 and 14>
According to the invention of Claims 3 and 14, the number of parts of the intermediate holding parts can be effectively reduced while realizing a configuration in which the main body case and the optical unit can be rotatably held.

<Invention of Claim 4>
According to invention of Claim 4, in the structure which can hold | maintain a main body case and an optical unit so that rotation is possible, the manufacturing cost of intermediate | middle holding components can be reduced effectively.

<Invention of Claim 5>
According to invention of Claim 5, a main body case and an optical unit will rotate centering | focusing on the predetermined position of the surface of an output side. Therefore, it becomes easy to perform delicate optical axis adjustment.

<Invention of Claim 6>
According to the invention of claim 6, since the engaged portion is formed at the corner portion of the main body case, it is easy to adopt a configuration with less dead space.

<Invention of Claim 7>
According to the invention of claim 7, the mounting property can be further improved.

<Invention of Claim 8>
According to the eighth aspect of the present invention, when the intermediate portion holding member is assembled to the main body case, it can be easily and satisfactorily attached without performing a long-distance slide operation or the like.

<Invention of Claim 9>
According to the ninth aspect of the present invention, rattling can be effectively suppressed in the engaged state. Further, the frictional force is reduced by the contact between the convex portion and the engaged portion, and when the relative movement is made between the release position and the engagement position, it can be smoothly moved with a small force.

<Invention of Claim 10>
According to the invention of claim 10, the convex portion functions as a rotation center when the engagement portion is relatively moved between the engagement position and the release position, and is a preferable example in which the rotation operation is performed satisfactorily.

<Invention of Claim 11>
According to the eleventh aspect of the present invention, the contact area between the convex portion and the engaged portion becomes smaller, and the frictional force generated between the engaging portion and the engaged portion during movement can be further reduced. It becomes. As a result, when the relative movement is performed between the release position and the engagement position, the movement can be performed with an extremely small force.

<Invention of Claim 12>
According to the invention of claim 12, the engaging portion and the engaged portion are firmly engaged by the elastic force of at least one of the engaging portion and the engaged portion.

<Embodiment 1>
Embodiment 1 of the present invention will be described with reference to the drawings.
FIG. 1 is a perspective view illustrating a mounting state of a multi-optical axis photoelectric sensor according to Embodiment 1, and FIG. 2 is a front view of a projector. FIG. 3 is an exploded perspective view of the end holder, and FIG. 4 is a perspective view of the end holder. In FIG. 1, the intermediate unit holder 80 corresponding to the intermediate unit holding member is omitted.

1. Overall Configuration 10 shown in FIG. 1 is a multi-optical axis photoelectric sensor, which is mainly composed of a projector 12 and a light receiver 13. The projector 12 and the light receiver 13 are vertically opposed to each other at the front end of the left and right vertical walls W (the wall corresponds to the mounting surface of the present invention) surrounding the work area together with the ceiling wall. Therefore, if an object exists between the two, the light emitted from the projector 12 and directed toward the light receiver 13 is blocked by the object, so that the light reception 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.

  The light projector 12 accommodates, for example, a light projecting unit 15 in which eight light projecting elements (corresponding to photoelectric elements of the present invention) 11 are arranged in a line in a long main body case 70 having a U-shaped cross section. It becomes. As shown in FIG. 2, the light projecting unit 15 includes a housing case 16 having a light projecting window (sealed by a light transmitting member) 16A on one side surface. The light projecting element 11 is housed in the housing case 16 with the light projecting destination facing the light projecting window 16A. An indicator lamp 19 for adjusting the optical axis is provided at one end of the light projecting unit 15 (the lower 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 the upper and lower open ends of the main body case 70. The cap members 17A and 17B have a block shape, and end holders 20 described below are attached to the end surfaces thereof.

  Next, a metal fitting for attaching the projector 12 to the vertical wall W will be described. The projector 12 includes an end holder 20 that holds both upper and lower ends of the main body case 70, and an intermediate section holder that holds a side surface of an intermediate portion in the longitudinal direction of the main body case 70 (corresponding to an intermediate portion holding member of the present invention). Is held by 90.

2. End Holder 20 First, the end holder 20 will be described.
As shown in FIG. 3, the end holder 20 is mainly composed of a plate-like base plate 21 fixed to the vertical wall W and a block-like connecting block 30 fixed to the cap members 17A and 17B. Composed. In addition, since the attachment structure of the edge holder 20 with respect to the upper and lower cap members 17A and 17B is the same, the following description will be given taking the cap member 17B as an example.

  Three through holes 21A and 21B are formed in the base plate 21 so as to vertically penetrate the plate surface. Of these through holes 21A and 21B, a pair of through holes 21A formed on the cap member 17B side of the base plate 21 are elongated holes along the longitudinal direction of the main body case 70, which are for attachment to the vertical wall W. It is a hole. A receiving portion 22 that protrudes toward the connecting block 30 is formed at the back end of the upper surface of the base plate 21. A surface of the receiving portion 22 that faces the connecting block 30 is a concave surface 23 that curves with a gentle curvature.

  The connection block 30 is provided with an insertion groove 31 penetrating along the longitudinal direction of the main body case 70 on the upper surface side in FIG. The insertion groove 31 is adapted to be fitted with the signal cable 18 drawn from the cap member 17B. Further, a pair of screw holes 32 are formed in the connecting block 30 on both the left and right sides of the insertion groove 31 in parallel with the insertion groove 31. On the other hand, a screw hole 19A is similarly formed in a portion of the end face of the cap member 17B facing the screw hole 32. Therefore, the connecting block 30 can be fixed to the cap member 17B by tightening together with the mounting screw 27 from the state in which the screw holes 19A, 32 are aligned.

  A sliding piece 33 having an arc shape that follows the curvature of the receiving portion 22 protrudes from the connection block 30 at a position facing the receiving portion 22 of the base plate 21. A pressing block 35 having a semicircular cross section is fitted on the inner peripheral side of the sliding piece 33. A pair of mounting holes 35A and 23A are provided on the upper end surface of the pressing block 35 and the concave surface 23 of the receiving portion 22, respectively, and the sliding piece 33 has a circumferential surface of the concave surface 23 at a position corresponding to the mounting holes 35A and 23A. A long hole 33A is formed along the direction. Therefore, the sliding piece 33 can be clamped by the receiving portion 22 and the pressing block 35 by tightening the mounting screw 38 so as to penetrate the holes 23A, 33A, 35A. Thereby, since the base plate 21 and the connection block 30 are fixed, the upper and lower ends of the main body case 70 can be fixed to the wall surface of the vertical wall W.

  If the tightening of the mounting screw 38 is loosened, the clamped state between the receiving portion 22 and the pressing block 35 is released. From this state, the main body case 70 is moved to the optical axis adjusting rotary shaft P1 (FIGS. 1 and 5). ) In the rotation direction, the mating surface of the receiving portion 22 and the sliding piece 33 and the mating surface of the sliding piece 33 and the pressing block 35 become slidable contact surfaces. It rotates smoothly. The curved shapes of the outer surfaces 35B, 33B, 33C and the concave surface 23 (that is, the shapes of the mating surfaces) shown in FIG. 3 and the like are merely examples. If the curvature of these curved surfaces is changed, the optical axis adjusting rotation described later is performed. The position of the axis P1 is changed. In the present embodiment, the curved shapes of the outer surfaces 35B, 33B, 33C and the concave surface 23 are set so that the optical axis adjusting rotation axis P1 is set at a position described later.

3. Intermediate Part Holder Next, the intermediate part holder 80 that holds the intermediate part of the main body case 70 will be described. FIG. 5 is a cross-sectional view illustrating the multi-optical axis photoelectric sensor 10 and the intermediate holder 80, and FIG. 6 is a perspective view illustrating the intermediate holder 80 with the engagement member 90 removed from the base portion 100. It is. In the main body case 70 in the multi-optical axis photoelectric sensor 10 of the present embodiment, the entire region C1 shown in FIG. 1 has the same cross-sectional shape as that in FIG. 7 is a cross-sectional view showing a state where the multi-optical axis photoelectric sensor 10 and the engaging member 90 are removed from the base member 100, and FIG. 8 is a plan view showing the engaging member 90 (from a direction facing the convex portion). It is a view). 9 is a cross-sectional view illustrating a state in which the multi-optical axis photoelectric sensor 10 and the engaging member 90 are rotated by a predetermined angle from FIG. In FIG. 9, the front position before rotation (front position in FIG. 5) is indicated by reference numeral 10A ′.

  As described above, the multi-optical axis photoelectric sensor 10 includes a plurality of photoelectric elements 11, an optical unit that forms a plurality of optical axes B <b> 1 by the plurality of photoelectric elements 11, and a longitudinal shape that accommodates the optical unit therein. Main body case 70, and both longitudinal ends thereof are attached to the wall surface of the vertical wall W via the end fixtures 20 and 20. The intermediate part holding structure according to the present invention is a structure in which the intermediate part in the longitudinal direction of the multi-optical axis photoelectric sensor 10 is attached and held by the intermediate part holding tool 80.

The intermediate holder 80 of the present embodiment has an engaging member 90 and a base member 100.
The engaging member 90 is integrally formed with a base portion 95 and an engaging portion 93 that engages with a protrusion 75 of the main body case 70 described later (the protrusion 75 corresponds to the engaged portion). Details of the engagement member 90 will be described later.

  The base member 100 holds the base portion 95 of the engaging member 90 so as to be rotatable about an optical axis adjusting rotation axis P1 configured substantially parallel to the longitudinal direction. As shown in FIGS. 5 and 6, the base member 100 includes a substrate portion 104 and an upright wall 105 that is formed upright from one end portion of the substrate portion 104. The standing wall 105 is formed over the entire length of the substrate portion 104 (the total length in the direction along the longitudinal direction of the multi-optical axis photoelectric sensor 10).

  A pair of mounting holes 104A and 105A are opened at positions near both ends of the substrate 104 and the upright wall 105, and the mounting hole 104A opened in the substrate 104 is for the vertical wall W. On the other hand, the mounting hole 105 </ b> A provided in the standing wall 105 is not used in the present embodiment, but is used, for example, when the projector 12 is attached to a corner portion where the walls intersect.

  As shown in FIGS. 5 and 6, the base member 100 is formed with a pair of sliding motion guide grooves 101. The pair of sliding motion guide grooves 101 has an arc shape centered on the optical axis adjusting rotation axis P1. Both end portions 98 and 99 of the engagement member 90 are fitted into the sliding motion guide groove 101, and the engagement member 90 is a rotation shaft for adjusting the optical axis with respect to the base member 100. It is connected so as to be rotatable about P1.

  The engaging member 90 is formed by sheet metal processing, and the base 95 has a curved plate shape. The engaging portion 93 includes a pair of claw-like portions 91 and 92 that sandwich a protrusion 75 described later from both sides, and has a configuration in which a plate piece is bent as shown in FIGS. 5, 6, and 8.

  The main body case 70 has a protrusion 75 (the protruding portion 75 corresponds to an engaged portion) that engages with the intermediate holder 80 on an outer surface different from the surface on which the optical axis B1 (FIG. 1) is formed. Is formed. The protrusion 75 is formed continuously between the upper and lower open ends of the main body case 70 in the entire longitudinal direction. The ridge 75 is formed simultaneously with the extrusion of the main body case 70. For this reason, it is not necessary to perform processing or the like for partially removing a part of the protrusion 75 in the longitudinal direction, and an increase in cost and man-hour is suppressed.

  The engagement part 93 is released from the engagement by rotating relative to the protrusion 75 about the engagement operation rotation axis P2 configured along the direction intersecting the longitudinal direction. The configuration is such that the position is displaced from the release position to the engagement position where the protrusion 75 is engaged. The “direction intersecting the longitudinal direction” means a direction that is not parallel to the longitudinal direction. In the present embodiment, the engagement operation rotation axis P2 is set along the protruding direction of the convex portion 97.

  Then, the end fixture 20 and the base portion 100 are attached to the wall surface (attachment surface) of the wall portion W in a state where the engagement portion 93 and the protrusion 75 are engaged with each other. The rotation of the portion 93 is relatively restricted (that is, the engagement member 90 is rotated about the optical axis adjustment rotation axis P1 by the restriction of the sliding motion guide groove 101 held in position, The middle part 10E of the main body case 70 is held in the engaged state by the intermediate part holding tool 80).

  As shown in FIG. 5, the multi-optical axis photoelectric sensor 10 includes a front surface 10A on the side where the optical axis B1 (FIG. 1) is configured, a pair of side surfaces 10B and 10C, and a back surface configured on the side opposite to the front surface 10A. 10D, and the protrusions 75 are formed at the corners 10G between the side surfaces 10B and 10C and the back surface 10D. The protrusion 75 extends in the longitudinal direction and protrudes outward. In the cross section orthogonal to the longitudinal direction of the multi-optical axis photoelectric sensor 10 as shown in FIG. , A base portion side small width portion 75A connected to the main body case 70 other than the protrusions 75) and a distal end portion side large portion 75B having a width wider than the small width portion 75A. Further, the base member 100 is configured not to cross the extended line of the optical axis B1 (FIG. 1) in a state where the protrusion 75 is arranged at the center in the rotation direction.

  On the other hand, as shown in FIG. 8, the claw-like portions 91 and 92 are respectively located on both sides in the direction intersecting the ridge 75 (in FIG. 8, the ridge 75 is shown by a one-dot chain line). . The distance L1 between the two claw-shaped portions 91 and 92 is larger than the width D1 of the large portion 75B, and the distance L2 in the clamping direction of both the claw-shaped portions 91 and 92 is smaller than the width D1 of the large portion 75B. Therefore, if the engaging member 90 is inclined obliquely with respect to the protrusion 75, the protrusion 75 can be easily entered between the claw-shaped portions 91 and 92, and in this state, the engaging operation is turned. If the engaging member 90 is rotated relative to the protrusion 75 about the axis P2, the engaged state is obtained as shown in FIG. As described above, since the width D1 of the large portion 75B is larger than the distance L2 in the clamping direction, it can be satisfactorily prevented.

  Further, the base portion 95 is formed with a hemispherical convex portion 97 whose tip comes into contact with the outer surface of the engaged portion when the engaging portion 93 and the protrusion 75 are in the engaged state. The convex portion 97 is provided at the center between the pair of claw-shaped portions 91 and 92.

  Of the engaging portion 93 and the protrusion 75, the engaging portion 93 (the claw-shaped portions 91 and 92) is configured to be elastically deformable, and in the engaged state of the engaging portion 93 and the protrusion 75, the engaging portion The engaging portion 93 is pressed against the protrusion 75 by the elastic restoring force 93. Specifically, the claw-shaped portions 91 and 92 are spread outward by a tapered surface formed on the ridge 75, and an elastic force is generated. That is, when the engaging portion 93 and the protrusion 75 are engaged, the claw-shaped portions 91 and 92 are guided by the tapered surfaces 75C and 75D in the direction in which the claw-shaped portions 91 and 92 are deformed. The engaging portion 93 (the claw-like portions 91 and 92) presses against the protrusion 75 by force.

  Further, the end fixing member 20 is arranged such that the position of the optical axis adjusting pivot axis P1 substantially coincides with the position of the outer surface (that is, the front surface 10A) on the optical unit (light projecting unit 15) on the side forming the optical axis. And the intermediate part holding member 80 is arranged.

<Embodiment 2>
FIG. 10 is a cross-sectional view illustrating a multi-optical axis photoelectric sensor and an engaging member according to the second embodiment, and FIG. 11 is a cross-sectional view illustrating the intermediate portion holding structure of the second embodiment. FIG. 12 is a perspective view illustrating the engaging member of the second embodiment.
In the present embodiment, the structure of the engaging portion and the engaged portion is different from that of the above embodiment, and the other components are the same except for the engaging portion and the engaged portion. Detailed description is omitted. As shown in FIG. 12, the engaging portion 193 of the present embodiment protrudes from the base portion 195, and a pair of engaging pieces 193A and 193A extend in a direction orthogonal to the protruding direction. The engaging portion 175 is configured in a groove shape, and is configured such that the back side is wide and the vicinity of the entrance is narrow. As shown in FIG. 10, when the engaging portion 193 is placed sideways, it is inserted into the engaged portion 175 and rotated after the insertion, whereby the engaged state as shown in FIG. 11 is obtained. Further, the pair of engaging pieces 193A and 193A are formed with a pair of curved portions 193B and 193B in the form of curved side surfaces at diagonal positions. Since the curved portions 193B and 193B are formed, after the engaging portion 193 is inserted into the engaged portion 175 as shown in FIG. It can be rotated well. Further, the pair of non-curved corners 193C and 193C prevents further rotation in one direction in the engaged state as shown in FIG. 11 (that is, the corners 193C and 193C have a rotation stopping function. In addition, the main body portion of the main body case 70 is stably held by the engaging member 190 in the engaged state. Such a curved portion 193B and corner portion 193C can be similarly formed in later-described third and fourth embodiments (that is, the engaging portion 293 (FIG. 15) and the engaged portion 375 (FIG. 17) are also included. Except for the portion configured in a tapered shape, the engaging portion 193 can have the same shape.

  Also in the present embodiment, as in the first embodiment, the multi-optical axis photoelectric sensor 10 includes a plurality of photoelectric elements 11, an optical unit that includes the plurality of photoelectric elements 11 and a plurality of optical axes B 1, and an optical unit. And a longitudinal main body case 70 that accommodates and holds the unit therein, and both longitudinal ends thereof are attached to the wall surface of the vertical wall W via the end fixtures 20 and 20. The intermediate portion holding structure according to the present invention is also a structure in which such an intermediate portion in the longitudinal direction of the multi-optical axis photoelectric sensor 10 is attached and held by the intermediate portion holder 80.

  The engaging portion 193 of the present embodiment is also displaced from the release position where the engagement is released to the engaging position where it engages with the protrusion 175 by rotating relative to the protrusion 175. It has a configuration.

  Then, with the engagement portion 193 and the protrusion 175 engaged, the end fixture 20 and the base portion 100 are attached to the wall surface (attachment surface) of the wall portion W, so that the engagement with the protrusion 175 is achieved. The relative rotation of the portion 193 is restricted, and the intermediate portion 10E of the main body case 70 is held in an engaged state with the intermediate portion holder 80.

<Embodiment 3>
FIG. 13 is a cross-sectional view illustrating the multi-optical axis photoelectric sensor and the engaging member according to the third embodiment, and FIG. 14 is a cross-sectional view illustrating the intermediate portion holding structure of the third embodiment. FIG. 15 is a side view illustrating the engaging member of the third embodiment.
In the present embodiment, the structure of the engaging portion and the engaged portion is different from that of the above embodiment, and the other components are the same except for the engaging portion and the engaged portion. Detailed description is omitted.

  As shown in FIG. 15, the engaging portion 293 of the present embodiment also protrudes from the base portion 295, and the pair of engaging pieces 293A and 293A extend in a direction orthogonal to the protruding direction. Similar to the second embodiment, the engaging portion 275 is formed in a groove shape, and has a wide back side and a narrow entrance. As shown in FIG. 13, when the engaging portion 293 is in a horizontal state, it is inserted into the engaged portion 275 and rotated after the insertion, whereby the engaging state as shown in FIG. 14 is obtained. This embodiment is different from the second embodiment in that a taper portion is formed on the base side surface of the engagement pieces 293A and 293A, and the holding piece 275A of the engaged portion 275 is rotated by rotation after insertion. , 275A is guided to be bent as shown in FIG. 14, and an elastic force is applied by these holding pieces 275A, 275A.

  Also in the present embodiment, as in the first embodiment, the multi-optical axis photoelectric sensor 10 includes a plurality of photoelectric elements 11, an optical unit that includes the plurality of photoelectric elements 11 and a plurality of optical axes B 1, and an optical unit. And a longitudinal main body case 70 that accommodates and holds the unit therein, and both longitudinal ends thereof are attached to the wall surface of the vertical wall W via the end fixtures 20 and 20. The intermediate portion holding structure according to the present invention is also a structure in which such an intermediate portion in the longitudinal direction of the multi-optical axis photoelectric sensor 10 is attached and held by the intermediate portion holder 80.

  The engaging portion 293 of the present embodiment is also displaced relative to the ridge 275 to be displaced from a release position where the engagement is released to an engagement position where the ridge 275 is engaged. It has a configuration.

  Then, in a state where the engaging portion 293 and the protrusion 275 are engaged, the end fixture 20 and the base portion 100 are attached to the wall surface (attachment surface) of the wall portion W, whereby the engagement with the protrusion 275 is achieved. The relative rotation of the portion 293 is restricted, and the intermediate portion 10E of the main body case 70 is held in the engaged state with the intermediate portion holder 80.

<Embodiment 4>
FIG. 16 is a cross-sectional view illustrating a multi-optical axis photoelectric sensor and an engaging member according to the fourth embodiment, and FIG. 17 is a cross-sectional view illustrating the intermediate portion holding structure of the fourth embodiment. FIG. 18 is a perspective view illustrating the engaging member of the fourth embodiment.
In the present embodiment, the structure of the engaging portion and the engaged portion is different from that of the above-described embodiment, and the other configurations are the same. Detailed description is omitted.

  The fourth embodiment has a configuration in which the shapes of the engaging portion and the engaged portion of the third embodiment are substantially reversed. That is, the engaged portion 375 protrudes and includes a pair of engaging pieces 375A and 375A. On the other hand, the engaging portion 393 is configured in a groove shape, the back side is configured to be wide, and the entrance side is configured to be narrow. Then, holding pieces 393A and 393A are formed in the engaging portion 373. The engaging pieces 375A and 375A of the engaged portion 375 are tapered, and in the engaged state, the holding pieces 393A and 393A are bent and elastic force is applied in the engaged state, as in the third embodiment. It has become.

  Also in the present embodiment, as in the first embodiment, the multi-optical axis photoelectric sensor 10 includes a plurality of photoelectric elements 11, an optical unit that includes the plurality of photoelectric elements 11 and a plurality of optical axes B 1, and an optical unit. And a longitudinal main body case 70 that accommodates and holds the unit therein, and both longitudinal ends thereof are attached to the wall surface of the vertical wall W via the end fixtures 20 and 20. The intermediate portion holding structure according to the present invention is also a structure in which such an intermediate portion in the longitudinal direction of the multi-optical axis photoelectric sensor 10 is attached and held by the intermediate portion holder 80.

  The engaging portion 393 of the present embodiment is also displaced from the release position where the engagement is released to the engagement position where it engages with the protrusion 375 by rotating relative to the protrusion 375. It has a configuration.

  Then, with the engagement portion 393 and the protrusion 375 engaged, the end fixture 20 and the base portion 100 are attached to the wall surface (attachment surface) of the wall portion W, so that the engagement with the protrusion 375 is achieved. The relative rotation of the portion 393 is restricted, and the intermediate portion 10E of the main body case 70 is held in an engaged state with the intermediate portion holder 80.

<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.

  (1) The engaged portions may be formed at a plurality of corners, and the engaging members may be engaged with the engaged portions, respectively.

  (2) You may make it fix the engagement member said in the said embodiment directly to an attachment surface. In this case, the engaging member corresponds to the intermediate portion holding member. Specifically, the base member may be omitted from the configuration of the first embodiment, and the base 95 may be configured in a flat plate shape and attached to the mounting surface. In this case, the engaged portion on the main body case 70 side may be a ridge formed at a corner as in the first embodiment, but a ridge similar to the ridge 75 in the first embodiment is provided at the position of the back surface 10D. You may make it form and attach said flat engagement member to this. Further, when the engagement member is directly attached to the attachment surface in this way, a hole for inserting a screw or the like may be provided in the base, and the engagement member may be attached to the attachment surface by a fastening member such as a screw.

The perspective view which shows the attachment state of the multi-optical axis photoelectric sensor in Embodiment 1. FIG. Front view of the projector Exploded perspective view of end holder Perspective view of end holder Sectional drawing which illustrates the multi-optical axis photoelectric sensor 10 and the intermediate holder 80 The perspective view which illustrates the state which removed the engaging member from the base part about the intermediate holder Sectional drawing which shows the state which removed the multi-optical axis photoelectric sensor and the engagement member from the base member The figure which shows an engaging member FIG. 5 is a cross-sectional view illustrating a state in which the multi-optical axis photoelectric sensor and the engaging member are rotated by a predetermined angle from FIG. Sectional drawing which illustrates the multi-optical axis photoelectric sensor and engagement member which concern on Embodiment 2. FIG. Sectional drawing which illustrates the intermediate part holding structure of Embodiment 2. The perspective view which illustrates the engaging member of Embodiment 2. Sectional drawing which illustrates the multi-optical axis photoelectric sensor and engagement member which concern on Embodiment 3. FIG. Sectional drawing which illustrates the intermediate part holding structure of Embodiment 3. The side view which illustrates the engagement member of Embodiment 3. Sectional drawing which illustrates the multi-optical axis photoelectric sensor and engagement member which concern on Embodiment 4. Sectional drawing which illustrates the intermediate part holding structure of Embodiment 4. The perspective view which illustrates the engagement member of Embodiment 4.

Explanation of symbols

10 ... multi-optical axis photoelectric sensor 10A ... front surface (outer surface on the side where the optical axis is formed)
10B, 10C ... side face 10D ... back face 10E ... intermediate part 10F, 10G ... corner part 11 ... photoelectric element 15 ... light projecting unit (optical unit)
20 ... End fixture (end holding member)
70 ... body case 75 ... ridge (engaged part)
75A ... Narrow width portion 75B ... Large portion 75C, 75D ... Tapered surface 80 ... Intermediate portion holder (intermediate portion holding member)
DESCRIPTION OF SYMBOLS 90 ... Engagement member 91,92 ... Claw-shaped part 93 ... Engagement part 95 ... Base part 97 ... Convex part 100 ... Base member B1 ... Optical axis L1 ... Distance between both claw-shaped parts L2 ... Clamping direction of both claw-shaped parts Distance P1 ... Optical axis adjustment pivot axis P2 ... Engagement operation pivot axis

Claims (14)

The multi-optical axis photoelectric sensor of the multi-optical axis photoelectric sensor, comprising a longitudinal main body case that accommodates photoelectric elements constituting a plurality of optical axes therein, wherein both longitudinal ends of the main body case are attached to an attachment surface via end fixing members. An intermediate part holding structure of a multi-optical axis photoelectric sensor that holds and holds an intermediate part in the longitudinal direction by an intermediate part holding member,
The main body case has an engaged portion that is engaged with the intermediate holding member on an outer surface different from a surface on which the optical axis is configured,
The intermediate holding member includes a base portion fixed to the mounting surface, and an engaging portion that is configured integrally with the base portion and engages with the engaged portion,
The engaging portion rotates relative to the engaged portion about an engaging operation rotation axis that intersects the longitudinal direction, thereby disengaging the engaged portion from the released position. It is configured to displace to an engagement position that engages with the engagement member,
The engagement portion and the engaged portion are engaged with each other, and the end fixing member and the base portion are attached to an attachment surface, so that the engagement portion is relative to the engaged portion. The intermediate part holding structure of the multi-optical axis photoelectric sensor is characterized in that the intermediate part of the main body case is held in an engaged state with the intermediate part holding member. The intermediate holding structure for a multi-optical axis photoelectric sensor according to claim 1, wherein the intermediate holding member is formed by sheet metal processing. The multi-optical axis photoelectric sensor of the multi-optical axis photoelectric sensor, comprising a longitudinal main body case that accommodates photoelectric elements constituting a plurality of optical axes therein, wherein both longitudinal ends of the main body case are attached to an attachment surface via end fixing members. An intermediate part holding structure of a multi-optical axis photoelectric sensor that holds and holds an intermediate part in the longitudinal direction by an intermediate part holding member,
The main body case has an engaged portion that engages with the intermediate holding member on an outer surface different from a surface on which the optical axis is configured,
The end fixing member holds the main body case so as to be rotatable about an optical axis adjusting rotation shaft configured substantially parallel to the longitudinal direction,
The intermediate holding member is
An engaging member formed integrally with a base and an engaging part that engages with the engaged part;
A base member that holds the base portion of the engaging member so as to be rotatable about an optical axis adjusting rotation shaft configured substantially parallel to the longitudinal direction;
Have
The engaging portion rotates relative to the engaged portion about an engaging operation rotation axis that intersects the longitudinal direction, thereby disengaging the engaged portion from the released position. It is configured to displace to an engagement position that engages with the engagement member,
The engagement portion and the engaged portion are engaged with each other, and the end fixing member and the base portion are attached to an attachment surface, so that the engagement portion is relatively relative to the engaged portion. The intermediate portion holding structure of the multi-optical axis photoelectric sensor is characterized in that general rotation is restricted and the intermediate portion of the main body case is held in engagement with the intermediate portion holding member. 4. The intermediate part holding structure for a multi-optical axis photoelectric sensor according to claim 3, wherein the engaging member is formed by sheet metal processing. The end portion fixing member and the intermediate portion holding member are arranged so that the position of the rotation axis for adjusting the optical axis substantially coincides with the position of the outer surface of the optical unit that forms the optical axis. The intermediate part holding structure of the multi-optical axis photoelectric sensor according to claim 3 or 4, The multi-optical axis photoelectric sensor has a front surface on which the optical axis is configured, a pair of side surfaces, and a back surface configured on the opposite side of the front surface,
The engaged portion is formed at a corner between the side surface and the back surface, and the base member is an extension of the optical axis in a state where the engaged portion is arranged at the center in the rotation direction. 6. The intermediate-portion holding structure for a multi-optical axis photoelectric sensor according to claim 3, wherein the intermediate portion holding structure is configured not to cross a line. The multi-optical axis photoelectric device according to claim 6, wherein the engaged portion is formed at a plurality of corner portions, and the engaging members are respectively engaged with the engaged portions. Sensor intermediate holding structure. The engaged portion comprises a ridge that extends in the longitudinal direction and protrudes outwardly,
The engaging portion includes a pair of claw-shaped portions that are located on both sides in a direction intersecting the ridge and sandwich the ridge from both sides,
The protrusion has, in a cross section perpendicular to the longitudinal direction, a small width portion on the base end portion side connected to the main body portion of the main body case, and a large portion on the tip end portion side having a width wider than the small width portion. The distance between the two claw-shaped portions is larger than the width of the large portion, and the distance in the clamping direction between the two claw-shaped portions is smaller than the large portion. The intermediate part holding structure of the multi-optical axis photoelectric sensor in any one of Claims 7. The base is formed with a convex portion whose tip is in contact with the outer surface of the engaged portion when the engaging portion and the engaged portion are in an engaged state. The intermediate part holding structure of the multi-optical axis photoelectric sensor according to any one of claims 1 to 8. The intermediate portion holding structure for a multi-optical axis photoelectric sensor according to claim 9, wherein the convex portion is provided at a center between the pair of claw-shaped portions. The intermediate portion holding structure of a multi-optical axis photoelectric sensor according to claim 9 or 10, wherein the convex portion has a hemispherical shape. At least one of the engaging portion and the engaged portion is formed with a tapered portion that presses the other when the engaging portion and the engaged portion are engaged. The intermediate part holding structure of the multi-optical axis photoelectric sensor according to any one of claims 1 to 11. An intermediate of a multi-optical axis photoelectric sensor having a longitudinal main body case that accommodates photoelectric elements constituting a plurality of optical axes, and having both longitudinal ends of the main body case attached to an attachment surface via end fixing members An intermediate holding member for holding the part,
The intermediate holding member is integrally formed with an engaging portion that engages with an engaged portion that is engaged with an outer surface different from a surface of the main body case on which the optical axis is configured. A base formed and attached to the mounting surface,
The engaging portion rotates relative to the engaged portion about an engaging operation rotation axis that intersects the longitudinal direction, thereby disengaging the engaged portion from the released position. It is configured to displace to an engagement position that engages with the engagement member,
The engagement portion is engaged with the engaged portion of the multi-optical axis photoelectric sensor fixed to the attachment surface by the end fixing member, and the base portion is attached to the attachment surface, An intermediate portion holding member of a multi-optical axis photoelectric sensor, wherein relative rotation of the engaging portion with respect to an engaged portion is restricted. An intermediate of a multi-optical axis photoelectric sensor having a longitudinal main body case that accommodates photoelectric elements constituting a plurality of optical axes, and having both longitudinal ends of the main body case attached to an attachment surface via end fixing members An intermediate holding member for holding the part,
An engaging portion that engages with an engaged portion that is engaged with an outer surface different from a surface on the side where the optical axis is formed in the main body case, and a base portion that is formed integrally with the engaging portion; An engagement member comprising:
A base member that holds the base portion of the engagement member so as to be rotatable about an optical axis adjusting rotation shaft configured substantially parallel to the longitudinal direction;
Have
The engaging portion rotates relative to the engaged portion about an engaging operation rotation axis that intersects the longitudinal direction, thereby disengaging the engaged portion from the released position. It is configured to displace to an engagement position that engages with the engagement member,
The engaging portion is engaged with the engaged portion of the multi-optical axis photoelectric sensor fixed to the attachment surface by the end fixing member, and the base portion holding the engaging member is attached. An intermediate portion holding member for a multi-optical axis photoelectric sensor, characterized in that the relative rotation of the engaging portion with respect to the engaged portion is restricted by being attached to a surface.

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