JP2021168249A - Mounting attachment - Google Patents

Abstract

To provide a mounting attachment for an optical sensor that can accurately perform optical axis adjustment without taking time despite a simple configuration.SOLUTION: A mounting attachment is a mounting attachment for mounting an optical sensor on a shaft, and comprises: a cramp that includes a first member and a second member sandwiching a shaft at center parts; and a bracket that has a hollow part in which one ends of the first member and the second member are interpolated and a fixing part for fixing the optical sensor. In a state in which the center parts of the first member and the second member sandwich the shaft, when a user picks knob parts provided on the other ends opposite to one ends of the first member and the second member, one ends of the first member and the second member are separated from each other to press an inner peripheral surface of the hollow part, and thereby the bracket is temporarily fixed to the cramp and the cramp is temporarily fixed to the shaft.SELECTED DRAWING: Figure 1

Description

The present invention relates to a mounting attachment.

A mounting device for attaching an optical sensor to a support or the like is known (see, for example, Patent Document 1).

Japanese Unexamined Patent Publication No. 2013-218892

As the performance of optical sensors has improved, it has become possible to detect even smaller and farther objects. In order to detect such an object, the optical sensor must be accurately installed with the appropriate orientation. However, for example, when an optical sensor is attached to a structure of a facility via an attachment device, it is difficult to strictly adjust the optical axis due to backlash of the fastening member or the like.

The present invention has been made to solve such a problem, and provides an optical sensor mounting attachment capable of adjusting the optical axis with high accuracy while having a simple structure.

The mounting attachment according to one aspect of the present invention is a mounting attachment for mounting an optical sensor on a shaft, a clamp including a first member and a second member each sandwiching the shaft at a central portion, and a first member and a second member. A first member is provided with a hollow portion into which one end of each member is inserted and a bracket having a fixing portion for fixing an optical sensor. When a force is applied to the knobs provided at the other ends of the member and the second member opposite to one end, the one ends of the first member and the second member are separated from each other. By pressing the inner peripheral surface of the hollow portion, the bracket is temporarily fixed to the clamp and the clamp is temporarily fixed to the shaft.

If the temporary fixing can be maintained by pinching the knob portion in this way, the optical sensor will not be unexpectedly displaced due to backlash, for example, in the subsequent work, and the optical axis adjusted before the temporary fixing will not be displaced. It can be performed.

The mounting attachment according to another aspect of the present invention is a mounting attachment for mounting an optical sensor on a shaft, and includes a clamp including a first member and a second member, each of which sandwiches the shaft at a central portion, and a first member. A bracket having a hollow portion into which one end of each of the second members is inserted and a fixing portion for fixing the optical sensor is provided, and each of the first member and the second member has a central portion in contact with the shaft as a fulcrum. , It has a knob part for making the other end opposite to one end a point of effort so that one end serves as an action point for pressing the inner peripheral surface of the hollow part, and each one end has an inner peripheral surface. When pressed, the bracket is temporarily fixed to the clamp and the clamp is temporarily fixed to the shaft.

Even in such an embodiment, if the temporary fixing can be maintained by applying the principle of the lever, the optical sensor will not be unexpectedly displaced due to backlash, for example, in the subsequent work, and the optical axis adjusted before the temporary fixing can be adjusted. This fixing can be performed without shifting.

In the mounting attachment of any of the above aspects, each of the first member and the second member has a fastening portion at a position different from that of the knob portion, and the other end portion of each of the first member and the second member is formed by the fastening portion. When tightened so as to be close to each other, the clamp may be mainly fixed to the shaft and the bracket may be mainly fixed to the clamp. With such a structure of the fastening portion, the knob portion can be arranged at a position where the user can easily pinch. Further, by the action of one fastening portion, it is possible to simultaneously realize the fixing of the optical sensor to the mounting attachment and the fixing of the mounting attachment to the shaft. That is, it is possible to prevent the optical axis adjusted before temporary fixing from shifting as much as possible.

At this time, the fastening portion may be provided between the knob portion and the central portion, respectively. With such an arrangement, the user can easily pinch the knob portion. Further, the knob portion may be provided in a direction protruding from the fastening portion. If the knob portion is provided in the protruding direction, the user can easily pinch the knob portion and easily perform the fastening work of the fastening portion.

Further, the knob portion may have a convex portion or a concave portion. If the knob portion is provided with a convex portion or a concave portion, the user can obtain an appropriate feeling of contact, and for example, the knob portion can be pinched without directly visually recognizing the knob portion. Further, the knob portion may have a through hole or a notch portion. Providing a through hole or a notch contributes to weight reduction of the mounting attachment.

Further, in the mounting attachment of any of the above aspects, the clamp is rotatable around the central axis of the shaft and the bracket is around the central axis of the hollow portion in the state before the bracket is temporarily fixed to the clamp. It should be rotatable. If it can rotate around two axes in this way, it is possible to perform highly accurate optical axis adjustment over a wide range.

INDUSTRIAL APPLICABILITY According to the present invention, it is possible to provide an optical sensor mounting attachment capable of adjusting the optical axis with high accuracy while having a simple structure.

It is an overall perspective view which shows the appearance that an optical sensor is attached to a shaft via an attachment and is fixed. It is a perspective view which shows how the optical sensor is fixed to a shaft via a mounting attachment, omitting the optical sensor. It is an exploded perspective view of the mounting attachment. It is a figure which shows the state of assembling a bracket to a clamp. It is a figure explaining the procedure of temporary fixing and final fixing. It is a side view of the 2nd member. It is a side view of the 2nd member which concerns on the modification. Further, it is a side view of the second member which concerns on the modification.

Embodiments of the present invention will be described with reference to the accompanying drawings. In each figure, those having the same reference numerals have the same or similar configurations.

FIG. 1 is an overall perspective view showing a state in which the optical sensor 300 is attached to and fixed to the shaft 400 via the attachment attachment 100. The shaft 400 is a part of a structure existing in the usage environment of the optical sensor 300, for example, a rack frame. Although the shaft 400 is assumed to be a cylinder in this embodiment, it may be a polygonal column or an elliptical column. Further, the shaft 400 does not have to be a part of a structure existing in the usage environment of the optical sensor 300, and may be a part of a moving body such as a robot as long as the optical sensor 300 is installed. good.

The optical sensor 300 is, for example, a triangular distance measuring type distance sensor. In the case of a distance sensor, the detection light L1 is projected from the laser diode toward the target T, which is the detection target, and the detection light L2 reflected by the target T and returned is received by the light receiving sensor and received by the target T. Measure the distance to. If the target T is far from the optical sensor 300 or the reflection region of the target T is small, it is necessary to accurately adjust the orientation of the optical sensor 300 while checking the destination of the detection light L1. The mounting attachment 100 according to the present embodiment is a mounting device that can easily mount the optical sensor 300 on the shaft 400 by accurately adjusting its orientation. The optical sensor 300 is not limited to the triangular distance measuring type distance sensor, and may be, for example, a TOF type distance sensor. Further, the sensor is not limited to the distance sensor, and other optical sensors may be used. For example, the amount of light that detects the presence or absence of a detection target by detecting whether or not the light emitted from the light projecting unit is reflected by the detection target and returns to the light receiving element, or how much it returns. It may be a discriminant type photoelectric sensor.

The mounting attachment 100 is mainly composed of a clamp 110 and a bracket 120. The bracket 120 functions as a base plate for fixing the optical sensor 300, and the optical sensor 300 is fixed to the bracket 120 by a plurality of fixing screws 140. The clamp 110 sandwiches the shaft 400 and supports the bracket 120 to which the optical sensor 300 is fixed. When the fastening bolt 131 is tightened, the clamp 110 is finally fixed to the shaft 400, and the bracket 120 is finally fixed to the clamp 110. The main fixing is to bring the fixed position into a state where the fixed position can be maintained without the support of an external force. Therefore, after the fastening bolt 131 is tightened, the relative position of the optical sensor 300 with respect to the shaft 400 is fixed, and the adjusted orientation is maintained.

The x-axis, y-axis and z-axis are defined as shown in the figure. In the subsequent drawings, the same coordinate axes as those in FIG. 1 are also shown to indicate the orientation of the structure represented by each drawing.

FIG. 2 is a perspective view showing how the optical sensor 300 is fixed to the shaft via the mounting attachment 100, omitting the optical sensor 300. Specifically, the orientation of the optical sensor 300 is such that the user rotates the clamp 110 around the central axis C1 of the shaft 400 before the final fixing, and the bracket 120 is around the central axis C2 of the hollow portion 122 provided in itself. It is adjusted by rotating it to. The hollow portion 122 is an annular through hole penetrating the substantially central portion of the bracket 120, and as will be described in detail later, a base end portion which is one end of the clamp 110 is inserted.

The screw hole 121 is a through hole provided in the bracket 120, through which a fixing screw 140 for fixing the optical sensor 300 is inserted. The screw hole 121 functions as a fixing portion for fixing the optical sensor 300. The mounting attachment 100 is not limited to the type in which the optical sensor 300 is fixed to the bracket 120 by the fixing screw 140, and various fixing types can be adopted. For example, a fixing mechanism by a lever may be provided on the bracket 120. Further, when the optical sensor 300 is fixed by interposing the adhesive sheet, the attachment portion to which the adhesive sheet is attached can be the fixing portion.

FIG. 3 is an exploded perspective view of the mounting attachment 100. The clamp 110 is mainly composed of a first member 111 and a second member 112, and sandwiches the shaft 400 between the first member 111 and the second member 112. The first member 111 and the second member 112 each have accommodating holes 113 facing each other when the shaft 400 is sandwiched. The accommodating hole 113 is a stepped hole. That is, it has a small-diameter inner hole through which the threaded portion of the fastening bolt 131 is penetrated, and a large-diameter outer hole for accommodating the head of the fastening bolt 131 or the fastening nut 132. The outer hole has a hexagonal column shape that matches the outer shape of the nut 132. The accommodating hole 113 functions as a fastening portion for fastening the first member 111 and the second member 112.

The ends of the first member 111 and the second member 112 each have a knob portion 114 for the user to pinch. The knob portion 114 will be described in detail later. As described above, the fixing screw 140 penetrates the screw hole 121 of the bracket 120 and fixes the optical sensor 300 to the bracket 120.

FIG. 4 is a view showing how the bracket 120 is assembled to the clamp 110, and is a view looking down from above the shaft 400. The first member 111 and the second member 112 have a base end portion 117 which is one end portion facing the bracket 120, a central portion 118 which sandwiches the shaft 400, and a tip portion 119 which is the other end portion provided with the knob portion 114, respectively. Includes three parts.

The central portion 118 is provided with a semi-cylindrical surface 116 so as to be in contact with the outer peripheral surface of the shaft 400. The semi-cylindrical surface 116 is a semi-cylindrical inner peripheral surface having a central axis along the axial direction of the shaft 400, and its radius of curvature is designed to be slightly larger than the radius of the shaft 400 that is supposed to be sandwiched. There is. Due to such a radial relationship, even if the first member 111 or the second member 112 rotates around the axis of the shaft 400, the semi-cylindrical surface 116 smoothly contacts along the outer peripheral surface of the shaft 400. When the shaft that is supposed to be sandwiched is a prism or the like, the semi-cylindrical surface 116 may be replaced with an inner peripheral surface that is a combination of flat surfaces according to the shape of the outer peripheral surface of the shaft.

The base end portion 117 is provided with an abutting surface 115 that abuts against the inner peripheral surface 123 of the hollow portion 122 provided in the bracket 120. The user sandwiches the shaft 400 between the first member 111 and the second member 112 and loosely tightens the fastening bolt 131. Then, the knob portions 114 are expanded so as to be separated from each other, and the two base end portions 117 each provided with the abutting surface 115 are brought close to each other. When the two base end portions 117 are brought close to each other, the base end portion 117 can be interpolated into the hollow portion 122 of the bracket 120. The user inserts the two base end portions 117 into the hollow portion 122 in a state of being close to each other, and assembles the bracket 120 to which the optical sensor 300 is attached to the clamp 110.

FIG. 5 is a diagram illustrating a procedure for temporarily fixing the clamp 110, the bracket 120, and the shaft 400 to each other and a procedure for finally fixing the clamp 110, the bracket 120, and the shaft 400, following FIG. In FIG. 5, the bracket 120 is shown in cross section.

When the user inserts the two base end portions 117 into the hollow portion 122 and then lightly pinches the two knob portions 114, the two base end portions 117 are separated from each other, and the abutting surface 115 is the inner peripheral surface of the hollow portion 122. Press 123 loosely. That is, when the user keeps the knob portion 114 lightly pinched, the clamp 110 is positioned with respect to the shaft 400, and the bracket 120 is positioned with respect to the clamp 110. In this state, the user slides the clamp 110 around the central axis C1 of the shaft 400 or the bracket 120 around the central axis C2 of the hollow portion 122 to accurately orient the optical sensor 300. Adjust to.

When the user strongly pinches the knob portion 114 in the state where the orientation adjustment is completed, the abutting surface 115 strongly presses the inner peripheral surface 123 of the hollow portion 122. That is, when the user maintains a state in which the knob portion 114 is strongly pinched to some extent, the clamp 110 is temporarily fixed to the shaft 400, and the bracket 120 is temporarily fixed to the clamp 110. The temporary fixing means that the clamp 110 is positioned with respect to the shaft 400 and the bracket 120 is positioned with respect to the clamp 110 only when the knob portion 114 is maintained in the pinched state. .. Therefore, when the knob of the knob portion 114 is released, the relative position of the optical sensor 300 with respect to the shaft 400 becomes uncertain, and the adjusted orientation cannot be maintained. If the position needs to be finely adjusted during temporary fixing, the clamp 110 and the inner peripheral surface 123 of the bracket 120 are rotated while maintaining the state of the contact portion between the clamp 110 and the shaft 400 by the pinching force of 114. Only one axis (C2) can be adjusted. Further, only one axis (C1) can be adjusted by rotating while sliding the contact surface between the clamp 110 and the shaft 400 while maintaining the state of the contact portion between the clamp 110 and the inner peripheral surface 123 of the bracket 120.

The accommodating hole 113 through which the fastening bolt 131 is passed is provided between the knob portion 114 and the central portion 118. When the fastening bolt 131 penetrating the accommodating hole 113 is tightened, an acting force acts on the tip portion 119 in the direction of approaching each other and the base end portion 117 in the direction of separating from each other, with the contact portion of the shaft 400 as a fulcrum. Therefore, when the user tightens the fastening bolt 131 to the fastening nut 132 with another hand, for example, using a hexagon wrench 410 while maintaining the temporarily fixed state, the semi-cylindrical surface 116 is pressed against the shaft 400, and the abutting surface 115 Is pressed against the inner peripheral surface 123. That is, the clamp 110 is finally fixed to the shaft 400, and the bracket 120 is finally fixed to the clamp 110. The user releases the knob of the knob portion 114 to complete the installation work.

If the temporary fixing state is maintained and the final fixing is performed in this way, the optical sensor is prevented from being unexpectedly displaced due to the tightening operation, and the orientation of the optical sensor 300 adjusted before the temporary fixing is not displaced. Further, the optical sensor 300 can be fixed to the mounting attachment 100 and the mounting attachment 100 can be fixed to the shaft 400 at the same time simply by tightening the fastening bolt 131. That is, it is possible to prevent the optical sensor 300 adjusted before the temporary fixing from being displaced as much as possible.

In this embodiment, an accommodating hole 113 is provided as a fastening portion for fastening the first member 111 and the second member 112, and the first member 111 and the second member 112 are fastened using the fastening bolt 131 and the fastening nut 132. However, the fastening mechanism is not limited to such a configuration. The fastening mechanism may be adopted as long as it is a mechanism that tightens the two tip portions 119 so as to approach each other on the tip portion 119 side of the central portion 118.

Further, it is preferable that the first member 111 and the second member 112 are the same member. In the present embodiment, the first member 111 and the second member 112 are the same members, and one of them is rotated 180 degrees with respect to the other to form a pair of clamps 110. If the same shape is used in this way, the mounting attachment can be manufactured at a lower cost.

The clamp 110 and the bracket 120 can be formed of a metal material such as a stainless steel material. A resin material can also be used if the usage state is limited, such as when the optical sensor 300 to be fixed is light.

Here, variations in the position and structure of the knob portion 114 will be described. FIG. 6 is a side view of the second member 112 of the above embodiment. Since the same applies to the knob portion 114 of the first member 111, the knob portion 114 of the second member 112 will be described here as an example.

The knob portion 114 is provided in a direction of projecting from the vicinity of the accommodating hole 113 constituting the fastening portion to the side opposite to the abutting surface 115. As described above, if the knob portion 114 is configured to project to the side opposite to the abutting surface 115 that supports the bracket 120, the user can easily pinch the knob portion 114 and perform the main fixing operation while maintaining the temporary fixing. Can be done.

Further, the knob portion 114 is provided with a through hole 1141. By providing the through hole 1141, the weight of the mounting attachment 100 can be reduced.

The mounting portion 114 is not limited to the case where the mounting portion 114 projects in the linear direction connecting the abutting surface 115 and the fastening portion. FIG. 7 is a side view of the second member 112 ′ according to the modified example. The second member 112'has a structure that projects downward with respect to the linear direction connecting the abutting surface 115 and the fastening portion. Depending on the restrictions on the mounting location, the knob portion 114 protruding upward and laterally may be preferable, not limited to the lower side as shown in the figure.

Further, the knob portion 114 may have a notch portion 1142 as shown in FIG. 7 instead of the through hole 1141 as described above. By providing such a notch 1142, the effect of weight reduction can be expected as well.

FIG. 8 is a side view of the second member 112 ”related to the modified example. The knob portion 114 may project from the vicinity of the accommodating hole 113 constituting the fastening portion in the downward direction or the upward direction. Even with such a configuration, since the positions of the fastening portion and the knob portion 114 can be changed, the main fixing operation can be easily performed while maintaining the temporary fixing.

Further, the knob portion 114 has a recess 1143 in the area where the user's finger touches. By providing such a recess 1143, the user can obtain an appropriate feeling of contact, and for example, the knob portion can be pinched without directly visually recognizing the knob portion. From such a viewpoint, a convex portion may be provided instead of the concave portion. The combination of the protruding direction of the knob portion 114 and the notch or recess provided in the knob portion 114 is not limited to the above, and may be any combination.

[Appendix 1]
A mounting attachment (100) for mounting the optical sensor (300) to the shaft (400).
A clamp (110) including a first member (111) and a second member (112), each sandwiching the shaft (400) at a central portion (118).
It has a hollow portion (122) into which one end portion (117) of each of the first member (111) and the second member (112) is inserted, and a fixing portion (121) for fixing the optical sensor (300). Equipped with a bracket (120)
The first member (111) and the second member (112) are in a state where the central portion (118) of each of the first member (111) and the second member (112) sandwiches the shaft (400). ), When a force is applied to the knobs (114) provided at the other ends (119) opposite to the one end (117), the first member (111) and the first member (111) and the above. When the one end portion (117) of the second member (112) is separated from each other and presses the inner peripheral surface (123) of the hollow portion (122), the bracket (120) is pressed against the clamp (110). A mounting attachment (100) that is temporarily fixed to the shaft (400) and the clamp (110) is temporarily fixed to the shaft (400).

[Appendix 2]
A mounting attachment (100) for mounting the optical sensor (300) to the shaft (400).
A clamp (110) including a first member (111) and a second member (112), each sandwiching the shaft (400) at a central portion (118).
It has a hollow portion (122) into which one end portion (117) of each of the first member (111) and the second member (112) is inserted, and a fixing portion (121) for fixing the optical sensor (300). Equipped with a bracket (120)
Each of the first member (111) and the second member (112) has the central portion (118) in contact with the shaft (400) as a fulcrum, and the one end portion (117) is the hollow portion (122). It has a knob portion (114) for making the other end portion (119) opposite to the one end portion (117) a force point so as to be an action point for pressing the inner peripheral surface (123) of the above.
When each of the one end portions (117) presses the inner peripheral surface (123), the bracket (120) is temporarily fixed to the clamp (110) and the clamp (110) is fixed to the shaft (400). Mounting attachment (100) that is temporarily fixed to.

100 ... Mounting attachment, 110 ... Clamp, 111 ... First member, 112, 112', 112 "... Second member, 113 ... Accommodating hole, 114 ... Knob part, 1141 ... Through hole, 1142 notch, 1143 ... Recessed part, 115 ... abutment surface, 116 ... semi-cylindrical surface, 117 ... base end portion, 118 ... central portion, 119 ... tip portion, 120 ... bracket, 121 ... screw hole, 122 ... hollow portion, 123 ... inner peripheral surface, 131 ... fastening Bolt, 132 ... Fastening nut, 140 ... Fixing screw, 300 ... Optical sensor, 400 ... Shaft, 410 ... Hex wrench

Claims (8)

It is a mounting attachment for mounting the optical sensor on the shaft.
A clamp containing a first member and a second member, each of which sandwiches the shaft at the center,
A bracket having a hollow portion into which one end of each of the first member and the second member is inserted and a fixing portion for fixing the optical sensor is provided.
In a state where the central portion of each of the first member and the second member sandwiches the shaft, each of the first member and the second member is provided at the other end opposite to the one end. When a force in the direction of sandwiching the knob portion is applied, one end portion of each of the first member and the second member is separated from each other and presses the inner peripheral surface of the hollow portion, whereby the bracket is released. A mounting attachment that is temporarily fixed to the clamp and the clamp is temporarily fixed to the shaft. It is a mounting attachment for mounting the optical sensor on the shaft.
A clamp containing a first member and a second member, each of which sandwiches the shaft at the center,
A bracket having a hollow portion into which one end of each of the first member and the second member is inserted and a fixing portion for fixing the optical sensor is provided.
Each of the first member and the second member has the one end portion and the one end portion as a fulcrum at the central portion in contact with the shaft and the one end portion as an action point for pressing the inner peripheral surface of the hollow portion. Has a knob for the opposite end to be the point of effort,
A mounting attachment in which when each of the one end portions presses against the inner peripheral surface, the bracket is temporarily fixed to the clamp and the clamp is temporarily fixed to the shaft. Each of the first member and the second member has a fastening portion at a position different from that of the knob portion, and the fastening portion brings the other ends of the first member and the second member closer to each other. The mounting attachment according to claim 1 or 2, wherein the clamp is mainly fixed to the shaft and the bracket is mainly fixed to the clamp when tightened in such a manner. The mounting attachment according to claim 3, wherein the fastening portion is provided between the knob portion and the central portion, respectively. The mounting attachment according to claim 3, wherein the knob portion is provided in a direction protruding from the fastening portion. The mounting attachment according to any one of claims 1 to 5, wherein the knob portion has a convex portion or a concave portion. The mounting attachment according to any one of claims 1 to 6, wherein the knob portion has a through hole or a notch portion. Claim that the clamp is rotatable around the central axis of the shaft and the bracket is rotatable about the central axis of the hollow portion before the bracket is temporarily fixed to the clamp. The mounting attachment according to any one of items 1 to 7.

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