JP2016163492A - Holding device and insulator contamination investigation device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily attach/detach a pilot insulator at a high place.SOLUTION: A detachable holding device 100 detachably holding a pilot insulator 20 as an installation object at a high place of an installation position comprises: a cylindrical fixing part 110 fixed to the installation position so that an opening end is positioned at a lower side; a columnar detachable part 120 that is arranged to the same axis with the fixing part 110, holds the pilot insulator 20, is inserted from a lower direction in the fixing part 110, and is pulled out to the lower direction from the fixing part 110; and a locking mechanism 130 that guides the detachable part 120 inserted into the fixing part 110 to a predetermined holding position while rotating the detachable part around its axis, and guides the detachable part 120 lifted from the predetermined holding position to a predetermined declining position while rotating the detachable part around its axis.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a detachable holding device that holds a pilot insulator, and also to an insulator contamination investigation device that includes the holding device and the pilot insulator.

  If the insulator is fouled by salt or dust, the insulation of the insulator is lowered. Therefore, a contamination investigation insulator called a pilot insulator is installed in the vicinity of the actual insulator, and the amount of salt, dust, or the like attached to the pilot insulator is measured, and the contamination state of the actual insulator is assumed (for example, Patent Document 1). .

Japanese Patent Application Laid-Open No. 10-282859

  By the way, if the pilot insulator is installed at a high place such as a steel tower, the contamination state of the actual insulator installed at the high place can be investigated. Therefore, it is desirable that the pilot insulator can be easily attached to and detached from the installation place in the high place in order to replace the pilot insulator installed in the high place or to lower it to the ground.

  The present invention has been made in view of the above circumstances. This invention makes it a subject to make it possible to attach or detach a pilot insulator easily in the installation place of a high place.

  The holding device according to the present invention is a detachable holding device that detachably holds the pilot insulator at a high installation position, and is a cylindrical shape that is fixed to the installation position so that the opening end is located on the lower side. A fixed part, a columnar attaching / detaching part arranged coaxially with the fixed part, holding the pilot insulator, inserted into the fixed part from below, and extending downward from the fixed part, and inserted into the fixed part The detachable part is rotated around its axis and guided to a predetermined holding position, and the detachable part raised from the predetermined holding position is rotated around its axis and guided to a predetermined lowered position. A mechanism.

In the holding device, the attachment / detachment mechanism includes a plurality of attachment / detachment protrusions provided on the outer peripheral surface of the attachment / detachment portion at predetermined intervals in the circumferential direction, and the plurality of attachment / detachment mechanisms provided on the inner peripheral surface of the fixing portion in the circumferential direction. A plurality of fixed-side protrusions provided so as to form a space through which the attachment-and-detachment-side protrusions can pass, and the fixed-side protrusions on the inner peripheral surface of the fixing part. A fixed-side guide protrusion provided at the same interval as the plurality of attachment-and-detachment-side protrusions on the upper side, and the attachment-and-detachment-side protrusion is formed with upper and lower inclined surfaces that are inclined opposite to each other. Two inclined surfaces that are aligned in the circumferential direction and inclined opposite to each other are formed at the lower portion of the fixed-side protrusion, so that the circumferential central portion of the lower portion of the fixed-side protrusion is convex downward, The upper portions of the fixed-side protrusions are aligned in the circumferential direction and The two inclined surfaces are formed so that a first entry corner portion into which an acute angle corner on the lower side of the detachable projection portion is fitted can be formed at a central portion in the circumferential direction of the upper portion of the fixed projection portion. The side guide protrusions have inclined surfaces that are parallel to each other and inclined to the opposite side of the upper inclined surface of the fixed-side protrusion and are arranged in the circumferential direction. A fitting second corner is formed at the center in the circumferential direction of the fixed guide protrusion, and the inclined surface of the fixed guide protrusion is an upper edge of the upper inclined surface of the fixed protrusion. The fixed guide protrusion may be arranged so as to be positioned above.
In that case, a recess into which the detachable projection is fitted is formed on the other inclined surface of the two inclined surfaces of the fixed projection, and the first corner is the recess. It may be formed at the bottom of.

  Moreover, the said holding | maintenance apparatus may be equipped with the linear member for raising the said attachment or detachment part by which one end was attached to the upper part of the said attachment or detachment part. In that case, the holding device may include a pulley that rotates the other end of the linear member downward.

  In addition, the holding device may include a biasing member that is disposed between an upper portion of the attaching / detaching portion and an upper portion of the fixing portion, and biases the attaching / detaching portion downward.

  The insulator fouling investigation apparatus according to the present invention includes the holding device and the pilot insulator held by the holding device.

  ADVANTAGE OF THE INVENTION According to this invention, the attachment or detachment work of the pilot insulator in a high place can be facilitated.

It is a front view which shows the insulator pollution investigation apparatus which concerns on one Embodiment. It is a perspective view which shows a holding | maintenance apparatus and an operation mechanism. It is a perspective view which shows a holding | maintenance apparatus and an operation mechanism. It is the front view and flat sectional view of a holding device. It is a figure for demonstrating the procedure which attaches an attachment / detachment part to a fixing | fixed part. It is a figure for demonstrating the procedure which attaches an attachment / detachment part to a fixing | fixed part. It is a figure for demonstrating the procedure which attaches an attachment / detachment part to a fixing | fixed part. It is a figure for demonstrating the procedure which attaches an attachment / detachment part to a fixing | fixed part. It is a figure for demonstrating the procedure which attaches an attachment / detachment part to a fixing | fixed part. It is a figure for demonstrating the procedure which attaches an attachment / detachment part to a fixing | fixed part. It is a figure for demonstrating the procedure which attaches an attachment / detachment part to a fixing | fixed part. It is a figure for demonstrating the procedure which attaches an attachment / detachment part to a fixing | fixed part. It is a figure for demonstrating the procedure which removes an attachment / detachment part from a fixing | fixed part. It is a figure for demonstrating the procedure which removes an attachment / detachment part from a fixing | fixed part. It is a figure for demonstrating the procedure which removes an attachment / detachment part from a fixing | fixed part. It is a figure for demonstrating the procedure which removes an attachment / detachment part from a fixing | fixed part. It is a figure for demonstrating the procedure which removes an attachment / detachment part from a fixing | fixed part. It is an elevation sectional view showing a modification of an operation mechanism. It is a perspective view which shows the modification of a holding | maintenance apparatus. It is a perspective view which shows the modification of a holding | maintenance apparatus.

  Embodiments of the present invention will be described below with reference to the drawings. However, the embodiments described below are provided with various technically preferable limitations for carrying out the present invention, and the scope of the present invention is not limited to the following embodiments and illustrated examples.

  FIG. 1 is a front view of the insulator defacement investigation apparatus 10. This insulator contamination investigation apparatus 10 is installed in the vicinity of an actual insulator for the purpose of investigating the condition of contamination of the actual insulator (for example, the amount of salt adhesion, the amount of dust attached, etc.). This insulator pollution investigation device 10 is attached to the arm metal 1 in a state where it is suspended from the arm metal 1 provided on a standing steel tower, a utility pole, or other raised body. This insulator contamination investigation device 10 includes a pilot insulator 20, a holding device 100, and an operation mechanism 30.

  The pilot insulator 20 is a porcelain long trunk insulator. The pilot insulator 20 is a sample exposed to the atmosphere in the same manner as the actual insulator. The pilot insulator 20 may be a glass or resin long trunk insulator, or may be a porcelain, glass or resin suspended insulator. That is, the kind, shape, material, and the like of the insulator used as the pilot insulator 20 may be changed as appropriate.

  The holding device 100 suspends the pilot lever 20 from the arm 1 and holds the pilot lever 20 on the arm 1. The pilot lever 20 can be attached to and detached from the brace 1 by the holding device 100. That is, when the holding device 100 is assembled, the pilot lever 20 is attached to the arm metal 1 by the holding device 100, and when the holding device 100 is disassembled, the pilot lever 20 is detached from the arm metal 1.

  The operation mechanism 30 is for performing an attaching / detaching operation of the holding device 100. Specifically, the operation mechanism 30 moves the pilot lever 20 up and down, and the holding device 100 is attached and detached by raising and lowering the pilot lever 20.

  2 and 3 are perspective views showing the holding device 100 and the operation mechanism 30. FIG. FIG. 2 shows a state in which the holding device 100 is assembled and the pilot lever 20 is attached to the brace 1 by the holding device 100. FIG. 3 shows a state in which the holding device 100 is disassembled and the pilot lever 20 is detached from the armband 1. As shown in these drawings, the holding device 100 locks or locks the fixed portion 110 connected to the arm 1, the detachable portion 120 attached to and detached from the fixed portion 110, and the detachable portion 120 and the fixed portion 110. And a lock mechanism (attachment / detachment mechanism) 130 to be released.

  The fixing portion 110 is a cylindrical body, one end in the axial direction of the fixing portion 110 is closed by the lid portion 112, and the other end in the axial direction of the fixing portion 110 is opened. Here, a hole 112 </ b> A through which a rope 32 described later is passed is formed at the center of the lid portion 112.

  The fixing part 110 is connected to the arm metal 1 by a connecting tool 113 and a hanging tool 114 such that the axial direction of the fixing part 110 extends in the vertical direction (more specifically, the vertical direction). The connecting tool 113 is provided on the upper surface of the lid portion 112, the connecting tool 113 is connected to the hanging tool 114, and the hanging tool 114 is attached to the arm metal 1 in a state of hanging from the arm metal 1. The movement of the fixed portion 110 around the axis is restricted by the hanging tool 114. Hereinafter, unless otherwise specified, the axial direction refers to a direction parallel to the center line of the fixed portion 110 extending vertically, and the circumferential direction refers to a circumferential direction centered on the center line of the fixed portion 110. The radial direction refers to a direction orthogonal to the center line of the fixed portion 110.

  The detachable portion 120 is a cylindrical body having end faces 122A and 122B at both axial ends. The detachable portion 120 is inserted into the fixed portion 110 from the lower end opening of the fixed portion 110, and the detachable portion 120 and the fixed portion 110 are arranged coaxially. The pilot insulator 20 is connected to the detachable portion 120 in a suspended state. Specifically, a hanger 121 is provided on the lower end surface 122 </ b> B of the detachable portion 120, and the upper end portion of the pilot insulator 20 is connected to the hanger 121.

  The lock mechanism 130 includes a plurality of fixed-side protrusions 132 provided at the lower portion of the inner peripheral surface of the fixed portion 110, a plurality of fixed-side guide protrusions 134 provided at the upper portion of the inner peripheral surface of the fixed portion 110, A plurality of detachable side protrusions 136 provided on the outer peripheral surface of the detachable portion 120, and a spring (biasing member) 38 disposed between the lid portion 112 of the fixing portion 110 and the end surface 122 </ b> A of the detachable portion 120. ing.

  A plurality of (for example, three) fixed-side protrusions 132 are arranged at a predetermined interval (for example, every 60 °) in the circumferential direction of the fixed portion 110 (see the section BB in FIG. 4). The fixed-side protrusion 132 includes two vertical side surfaces 132A and 132B and four inclined surfaces 132C, 132D, 132E, and 132F.

The inclined surfaces 132C, 132D, 132E, and 132F are inclined with respect to a surface defined by the circumferential direction and the radial direction (more specifically, a horizontal surface).
The side surfaces 132A and 132B are orthogonal to a surface defined by the circumferential direction and the radial direction (more specifically, a horizontal surface). Therefore, the side surfaces 132A and 132B are vertical surfaces, the side surface 132A faces in one circumferential direction (clockwise direction when viewed from above, the same applies hereinafter), and the side surface 132A faces the other in the circumferential direction (viewed from the top and opposite). (Clockwise direction, the same applies hereinafter). Hereinafter, a surface defined by the circumferential direction and the radial direction is referred to as a reference surface. The reference plane is orthogonal to the axial direction.

The inclined surfaces 132C and 132D are arranged side by side in the circumferential direction on the lower surface of the fixed-side protrusion 132. One inclined surface 132C is arranged on one side in the circumferential direction of the other inclined surface 132D. The inclined surface 132D is inclined downward with respect to the reference surface toward one side in the circumferential direction. The angle formed by the inclined surface 132D and the reference surface is, for example, about 30 °. The inclined surface 132C is inclined downward with respect to the reference surface toward the other circumferential side. The angle formed by the inclined surface 132D and the reference surface is, for example, about 30 °. The inclined surface 132C and the inclined surface 132D are connected to each other at the lower end of the fixed-side protruding portion 132 (the central portion of the lower portion of the fixed-side protruding portion 132), and the lower portion of the fixed-side protruding portion 132 is formed in an inverted triangle shape by the inclined surfaces 132C and 132D. ing. A corner portion sandwiched between the inclined surface 132C and the inclined surface 132D is an obtuse angle (for example, 120 °).
The side surface 132A extends upward from an edge on one side in the circumferential direction of the inclined surface 132C, and a corner portion sandwiched between the inclined surface 132C and the side surface 132A has an obtuse angle (for example, 120 °). The side surface 132B extends upward from the edge on the other circumferential side of the inclined surface 132D, and the corner portion sandwiched between the inclined surface 132D and the side surface 132B has an obtuse angle (for example, 120 °).

  The inclined surfaces 132E and 132F are juxtaposed in the circumferential direction on the upper surface of the fixed-side protrusion 132. One inclined surface 132E is arranged on one side in the circumferential direction of the other inclined surface 132F. The inclined surface 132E is inclined upward with respect to the reference surface toward one side in the circumferential direction. The angle formed by the inclined surface 132E and the reference surface is, for example, about 30 °. The inclined surface 132F is inclined upward toward the one side in the circumferential direction with respect to the reference surface. The angle formed by the inclined surface 132F and the reference surface is, for example, 30 °. In addition, the inclined surface 132C and the inclined surface 132E are arranged so as to be aligned vertically in parallel with each other, and the inclined surface 132D and the inclined surface 132F are arranged so as to be inclined in the opposite directions and aligned vertically.

  There is a step between the inclined surface 132E and the inclined surface 132F. That is, the vertical regulating surface 132K extends upward from the other circumferential edge of the inclined surface 132E, and the regulating surface 132K is connected to one circumferential edge of the inclined surface 132F. As a result, an entrance corner 132G and an acute angle (for example, 60 °) corner 132J are formed at the boundary between the inclined surface 132E and the inclined surface 132F. The corner portion 132G is a corner that is sandwiched between the regulating surface 132K and the inclined surface 132E, and the corner portion 132J is a corner that is sandwiched between the regulating surface 132K and the inclined surface 132F.

  The side surface 132A extends downward from one edge in the circumferential direction of the inclined surface 132E, and the corner portion 132H sandwiched between the side surface 132A and the inclined surface 132E has an acute angle (for example, 60 °). The side surface 132B extends downward from the edge on the other circumferential side of the inclined surface 132F, and the corner portion 132I sandwiched between the side surface 132B and the inclined surface 132F has an obtuse angle (for example, 120 °). Further, the upper ends (corner portions 132H and 132I) of the inclined surfaces 132E and 132F are located at the same height.

  A plurality of (for example, three) fixed-side guide protrusions 134 are arranged at predetermined intervals (for example, every 60 °) in the circumferential direction of the fixed portion 110 (see the AA cross section in FIG. 4). The fixed side guide protrusion 134 includes two inclined surfaces 134A and 134B.

  The inclined surfaces 134A and 134B are provided on the lower surface of the fixed guide protrusion 134. One inclined surface 134A and the other inclined surface 134B are juxtaposed in the circumferential direction, and the inclined surface 134A is arranged on one circumferential side of the inclined surface 134B. The inclined surface 134A is inclined downward with respect to the reference surface toward one side in the circumferential direction. The angle formed by the inclined surface 134A and the reference surface is, for example, 30 °. The inclined surface 134B is inclined downward with respect to the reference surface toward one side in the circumferential direction. The angle formed by the inclined surface 134B and the reference surface is, for example, 30 °. That is, the inclined surfaces 134A and 134B are inclined to the opposite side with respect to the inclined surfaces 132E and 132F.

  There is a step between the inclined surface 134A and the inclined surface 134B. That is, the vertical regulating surface 134D extends downward from the other circumferential edge of the inclined surface 134A, and the regulating surface 134D is connected to one circumferential edge of the inclined surface 134B. In addition, the upper ends of the inclined surfaces 134A and 134B are located at the same height, and thereby, a corner portion 134C is formed at the boundary between the inclined surface 134A and the inclined surface 134B.

  Here, as shown in FIG. 4, the inclined surface 134A is arranged so as to cross the upper part of the corner 132H in the circumferential direction, and the central part of the inclined surface 134A is positioned vertically above the corner 132H. The inclined surface 134B is arranged so as to extend in the circumferential direction above the upper corner of the entering corner portion 132G and the corner portion 132J, and the central portion of the inclined surface 134B is positioned above the inner corner portion 132G and the corner portion 132J. That is, the fixed-side guide protrusion 134 is arranged so as to be shifted in the circumferential direction by a predetermined angle (for example, 15 °) with respect to the fixed-side protrusion 132, and a part of the inclined surface 134 A of the fixed-side guide protrusion 134. (For example, half the length) is located vertically above the space between the fixed-side protrusions 132.

  A plurality (for example, three) of the detachable side protrusions 136 are arranged at a predetermined interval (for example, every 60 °) in the circumferential direction of the detachable portion 120 (see the section BB in FIG. 4). The detachable side protrusion 136 includes two vertical side surfaces 136A and 136B and two inclined surfaces 136C and 136D. Further, the lateral width of the detachable projection 136 (the interval between the side surfaces 136A and 136B) is slightly narrower than the lateral width of the space between the plurality of fixed projections 132.

An inclined surface 136 </ b> C is provided on the upper surface of the detachable side protrusion 136. The inclined surface 136C is inclined downward with respect to the reference surface toward one side in the circumferential direction. The angle formed by the inclined surface 136C and the reference surface is, for example, 30 °.
The side surface 136A extends downward from an edge on one side in the circumferential direction of the inclined surface 136C. The angle of the corner sandwiched between the side surface 136A and the inclined surface 136C is an obtuse angle (for example, 120 °).
The side surface 136B extends downward from the edge on the other circumferential side of the inclined surface 136C. The angle of the corner 136E sandwiched between the side surface 136B and the inclined surface 136C is an acute angle (for example, 60 °).

An inclined surface 136D is provided on the lower surface of the detachable side protrusion 136. The inclined surface 136D is inclined downward toward the other circumferential side with respect to the reference surface. That is, the inclined surfaces 136C and 136D are inclined to the opposite sides.
The side surface 136A extends upward from the edge on one side in the circumferential direction of the inclined surface 136D. The angle of the corner sandwiched between the side surface 136A and the inclined surface 136D is an obtuse angle (for example, 120 °).
The side surface 136B extends upward from an edge on the other circumferential side of the inclined surface 136D. An angle of the corner 136F sandwiched between the side surface 136B and the inclined surface 136D is an acute angle (for example, 60 °).

  The inclined surface 136C is parallel to the inclined surfaces 134A and 134B of the fixed-side guide protrusion 134 and the inclined surface 132D of the fixed-side protrusion 132, and the inclined surfaces 132C, 132E, and 132F of the fixed-side protrusion 132. It is inclined to the opposite side. The inclined surface 136D is parallel to the inclined surfaces 132C, 132E, and 132F of the fixed-side protrusion 132, and is inclined to the opposite side to the inclined surfaces 134A and 134B of the fixed-side guide protrusion 134.

  As shown in FIG. 2, when the detachable portion 120 is mounted on the fixed portion 110 and these are locked by the lock mechanism 130, the lower inclined surface 136 </ b> D on the lower side of the detachable side protrusion 136 and the upper side of the fixed side protrusion 132. One of the inclined surfaces 132E is in contact, the side surface 136B of the detachable side projection 136 is in contact with the regulating surface 132K of the fixed side projection 132, and the lower corner 136F of the detachable side projection 136 and the fixed side projection The fitting corner part 132G of 132 fits. In other words, the vertical load of the detachable side protrusion 136 is received by the inclined surface 132E and the regulation surface 132K of the fixed side protrusion 132. Specifically, a component perpendicular to the inclined surface 132E is received by the inclined surface 132E and a component parallel to the inclined surface 132E is received by the regulating surface 132K.

  Here, the spring 38 is a compression coil spring, and one end thereof is attached to the center of the lower surface of the lid portion 112 of the fixing portion 110 and is elastically deformed between the lid portion 112 and the end surface 122A of the detachable portion 120. Intervened in a compressed state. As a result, the attaching / detaching portion 120 is biased downward by the elastic force of the spring 38, and the lower inclined surface 136D of the attaching / detaching side protrusion 136 and the one inclined surface 132E above the fixed protrusion 132 are pressed against each other. The side surface 136B of the detachable side protrusion 136 and the regulation surface 132K of the fixed side protrusion 132 are in pressure contact with each other. Therefore, rattling in the fixing part 110 of the detachable part 120 is suppressed, and the locked state by the lock mechanism 130 is maintained.

  As shown in FIGS. 1 to 3, the operation mechanism 30 includes a rope 32 and pulleys 34 and 36. One end of the rope 32 is attached to the center of the end surface 122A of the attaching / detaching portion 120. Further, the pulleys 34 and 36 are disposed so as to be rotatable about horizontal axes parallel to each other above the fixed portion 110 and are supported by the raised body (particularly the brace 1). The pulley 34 may be supported by the connecting tool 113 or the hanging tool 114.

  Here, the rope 32 is passed through the hole 112 </ b> A at the center of the lid portion 112 of the fixing portion 110 and is wound around the pulleys 34 and 36. The pulley 34 is arranged such that the rope 32 extending vertically upward from the hole 112A is turned in the horizontal direction, and the pulley 36 is arranged so that the rope 32 extending horizontally from the pulley 34 is turned vertically downward. Yes.

  5-12 is a figure for demonstrating the procedure which attaches the attachment / detachment part 120 to the fixing | fixed part 110. FIG. As shown in FIG. 5, when attaching / detaching part 120 to / from fixed part 110, attaching / detaching part 120 is raised by pulling rope 32. At this time, as shown in FIGS. 6 and 7, when the position of the detachable side protrusion 136 is shifted in the circumferential direction with respect to the position of the space between the fixed side protrusions 132, the detachable side protrusion 136. The corner 136E contacts the inclined surface 132C of the fixed-side protrusion 132 (see FIG. 6), or the inclined surface 136C of the detachable-side protrusion 136 contacts the inclined surface 132D. Here, as shown in FIG. 6, when the corner portion 136E hits the inclined surface 132C, the corner portion 136E is guided obliquely upward by the inclined surface 132C, so that the detachable portion 120 is viewed in a plan view. By rotating in the rotation direction (one side in the circumferential direction), the detachable side protrusion 136 is guided to the space between the fixed side protrusions 132. On the other hand, as shown in FIG. 7, when the inclined surface 136C hits the inclined surface 132D, the inclined surface 136C is guided obliquely upward by the inclined surface 132D, so that the detachable portion 120 is counterclockwise in plan view. By rotating in the rotation direction (the other side in the circumferential direction), the detachable side protrusion 136 is guided to the space between the fixed side protrusions 132.

  Next, as shown in FIG. 8, when the detachable side protrusion 136 passes through the space between the fixed side protrusions 132, the detachable part 120 moves upward in the fixed part 110. Here, as shown in FIG. 9, when the attaching / detaching portion 120 is pulled up to the back of the fixing portion 110, the inclined surface 136 </ b> C of the attaching / detaching-side protrusion 136 hits the inclined surface 134 </ b> A of the fixed-side guide protrusion 134. Then, the upward movement of the pilot lever 20 and the attaching / detaching portion 120 is converted into a counterclockwise (the other side in the circumferential direction) rotational movement in plan view by the inclined surface 134A of the fixed side guide protrusion 134 and the attaching / detaching side protrusion 136. That is, as shown in FIG. 10, the inclined surface 136C is guided obliquely upward by the inclined surface 134A, whereby the attaching / detaching portion 120 rotates counterclockwise in plan view. Then, the side surface 136 </ b> B of the detachable side protrusion 136 abuts on the regulation surface 134 </ b> D of the fixed side guide protrusion 134, and the corner 136 </ b> E of the detachable side protrusion 136 fits into the corner portion 134 </ b> C of the fixed side guide protrusion 134. Thereby, the rotation of the detachable portion 120 in the counterclockwise direction in plan view is stopped.

  Next, as shown in FIG. 11, when the pulled rope 32 is loosened, the attaching / detaching portion 120 is lowered by its own weight and the elastic force of the spring 38, and the inclined surface 136 </ b> D of the attaching / detaching side protrusion 136 is It hits the inclined surface 132E. Then, the downward movement of the pilot lever 20 and the attaching / detaching portion 120 is converted into a rotational motion counterclockwise (the other side in the circumferential direction) in plan view by the inclined surface 132E of the fixed-side protrusion 132 and the attaching / detaching-side protrusion 136. That is, the inclined surface 136D of the attaching / detaching-side protrusion 136 is guided obliquely downward by the inclined surface 132E of the fixed-side protruding portion 132, so that the attaching / detaching portion 120 is rotated counterclockwise in plan view as shown in FIG. Rotate. Then, the side surface 136B of the attaching / detaching side protrusion 136 is brought into contact with the regulating surface 132K of the fixing side protrusion 132, the corner 136F of the attaching / detaching side protrusion 136 is fitted into the corner portion 132G of the fixing side protrusion 132, and the attaching / detaching part 120. Is locked to the fixed portion 110 by the lock mechanism 130.

13 to 17 are diagrams for explaining a procedure for detaching the attaching / detaching unit 120 from the fixing unit 110. As shown in FIG. 13, when detaching the detachable portion 120 from the fixed portion 110, the detachable portion 120 is temporarily raised by pulling the rope 32. At this time, as shown in FIG. 14, the inclined surface 136 </ b> C of the attaching / detaching side protrusion 136 hits the inclined surface 134 </ b> B of the fixed side guide protrusion 134. Then, the upward movement of the pilot lever 20 and the attaching / detaching part 120 is converted into a counterclockwise (the other side in the circumferential direction) rotational movement in a plan view by the inclined surface 134B of the fixed guide protrusion 134 and the attaching / detaching protrusion 136.
In other words, the inclined surface 136C of the attaching / detaching-side protrusion 136 is guided obliquely upward by the inclined surface 134B of the fixed-side guide protrusion 134, whereby the attaching / detaching portion 120 rotates counterclockwise in plan view.

  Next, as shown in FIG. 15, when the pulled rope 32 is loosened, the attaching / detaching portion 120 is lowered by its own weight and the elastic force of the spring 38, and the inclined surface 136 </ b> D of the attaching / detaching side protrusion 136 is fixed to the fixed side protrusion 132. It hits the inclined surface 132F. Then, the downward movement of the pilot insulator 20 and the attaching / detaching portion 120 is converted into a rotational motion counterclockwise (the other side in the circumferential direction) in plan view by the inclined surface 132F of the fixed-side protrusion 132 and the attaching / detaching-side protrusion 136. That is, as shown in FIG. 16, the inclined surface 136D of the attaching / detaching-side protrusion 136 is guided obliquely downward by the inclined surface 132F of the fixed-side protrusion 132, so that the attaching / detaching portion 120 rotates counterclockwise. The detachable side protrusion 136 is guided to the space between the fixed side protrusions 132. As a result, as shown in FIG. 17, the lock mechanism 130 is unlocked, and the detachable portion 120 can be detached from the fixed portion 110.

  As described above, the holding device 100 according to the present embodiment is a detachable holding device that detachably holds the pilot insulator 20 that is an installation target in the armrest 1 that is an installation position at a high place, The cylindrical fixing part 110 is fixed so that the opening end is positioned on the lower side, and is arranged coaxially with the fixing part 110 to hold the pilot insulator 20 and is inserted into the fixing part 110 from below, The cylindrical attaching / detaching portion 120 that comes out from the inside of the 110 and the attaching / detaching portion 120 inserted into the fixed portion 110 are rotated around the axis thereof and guided to a predetermined holding position, and then lifted from the predetermined holding position. And a locking mechanism 130 for rotating the attached / detached portion 120 around its axis to guide it to a predetermined lowered position. Thereby, for example, by attaching the rope 32 to the attaching / detaching part 120 and pulling up the attaching / detaching part 120 by the rope 32 as in the present embodiment, the attaching / detaching part 120 can be attached to or detached from the fixing part 110, The operation of installing and collecting the pilot insulator 20 on the armrest 1 at a high place can be easily performed.

  The locking mechanism 130 includes a plurality of detachable side protrusions 136 provided on the outer peripheral surface of the detachable portion 120 at predetermined intervals in the circumferential direction, and a plurality of detachable sides on the inner peripheral surface of the fixed portion 110 in the circumferential direction. From a plurality of fixed-side protrusions 132 provided so as to form a space through which the detachable-side protrusion 136 can pass at the same interval as the protrusions 136, and the fixed-side protrusions 132 on the inner peripheral surface of the fixing part 110 Also, a fixed-side guide protrusion 134 provided at the same interval as the plurality of attachment / detachment-side protrusions 136 is provided on the upper side. Here, the attachment / detachment-side protrusion 136 is formed with upper and lower inclined surfaces 136C and 136D that are inclined opposite to each other. In addition, two inclined surfaces 132C and 132D that are inclined opposite to each other are formed below the fixed-side protrusion 132 so that the central portion in the horizontal width direction protrudes downward. Further, two inclined surfaces 132E and 132F that are parallel to each other are formed on the upper portion of the fixed-side protruding portion 132, and a corner portion 132G in which an acute corner portion 136F on the lower side of the detachable-side protruding portion 136 is fitted in the central portion in the lateral width direction. The fixed-side guide protrusion 134 has two inclined surfaces 134A and 134B that are parallel to each other and inclined to the opposite side of the inclined surfaces 132E and 132F on the upper side of the fixed-side protrusion 132. It is formed so that a corner portion 134C into which a sharp corner portion 136E on the upper side of the detachable side projection portion 136 fits can be formed. Furthermore, the fixed-side guide protrusion 134 is arranged such that the two inclined surfaces 134A and 134B are positioned on the two acute corners 132H and 132J above the fixed-side protrusion 132. As a result, the attaching / detaching portion 120 inserted into the fixing portion 110 is rotated around its axis to guide it to a predetermined holding position, or the attaching / detaching portion 120 raised from the predetermined holding position is set around its axis. It can be rotated and guided to a predetermined lowered position.

  Further, one end of a rope 32 which is a linear member for pulling up the detachable portion 120 is attached to the upper portion of the detachable portion 120, and the other end side of the rope 32 is turned downward by pulleys 34 and 36. As a result, the pilot insulator 20 can be installed or recovered by a simple operation of pulling up or suspending the detachable portion 120 by the rope 32.

  Further, a spring 38 as an urging member is disposed between the upper part of the attaching / detaching part 120 and the upper part of the fixing part 110, and the attaching / detaching part 120 is urged downward by the spring 38. Thereby, rattling in the fixing part 110 of the detachable part 120 can be suppressed.

  FIG. 18 is an elevational sectional view showing a modification of the operation mechanism 30. As shown in this figure, in this modification, one end of the rope 32 is attached to a floor surface, a structure or the like below the arm metal 1 via a spring 39. This spring 39 is a tension coil spring. The spring 39 is elastically extended and the rope 32 is in a tensioned state.

  Here, the elastic coefficient of the spring 39 is set lower than the elastic coefficient of the spring 38. Therefore, the force that pulls down the rope 32 by the spring 39 does not exceed the force that pushes the detachable portion 120 by the spring 38. As a result, the rope 32 can be held at a fixed position without being loosened, and the function of the lock mechanism 130 can be prevented from being hindered by the tension of the rope 32.

  19 and 20 are perspective views showing modifications of the holding device 100. FIG. FIG. 19 shows a state in which the holding device 100 is assembled and the pilot lever 20 is attached to the brace 1 by the holding device 100. FIG. 20 shows a state in which the holding device 100 is disassembled and the pilot lever 20 is detached from the armband 1.

  As shown in FIGS. 19 and 20, a recessed portion 132 </ b> L is formed on the inclined surface 132 </ b> E of the stationary protrusion 132. The recessed portion 132L is disposed closer to the inclined surface 132F side of the inclined surface 132E. The restricting surface 132K extends downward from the corner 132J and reaches the bottom of the recess 132L. A corner portion 132G sandwiched between the bottom surface of the recess 132L and the regulation surface 132K is formed at the bottom of the recess 132L. The bottom surface of the recess 132L is parallel to the inclined surface 132E and the inclined surface 136D of the detachable side protrusion 136.

  As shown in FIG. 19, in a state where the detachable portion 120 is locked to the fixed portion 110 by the lock mechanism 130, the lower portion of the detachable side protruding portion 136 fits into the concave portion 132 </ b> L of the fixed side protruding portion 132, and the detachable side protruding portion 136. The inclined surface 136D is in contact with the bottom surface of the concave portion 132L, the side surface 136B of the detachable side protrusion 136 is in contact with the regulating surface 132K of the fixed side protrusion 132, and the corner 136F of the detachable side protrusion 136 is the entrance corner 132G. Fits in. Therefore, it is possible to suppress the attachment / detachment portion 120 from swinging relative to the fixed portion 110 due to wind or the like.

  When the attaching / detaching part 120 is pulled up by the rope 32 from the locked state, the attaching / detaching side protrusion 136 is pulled out from the recess 132L, and the inclined surface 136C of the attaching / detaching side protrusion 135 is inclined by the fixed side guide protrusion 134 as described above. The detachable side protrusion 135 is brought into contact with the surface 134B and guided in the counterclockwise direction in plan view by the inclined surface 134B.

  On the other hand, when locking the detachable portion 120 to the fixed portion 110, when the detachable portion 120 is pulled up by the rope 32 as described above, the detachable side protrusion 136 is guided by the inclined surface 134A of the fixed side guide protrusion 134. The side surface 136 </ b> B abuts on the regulation surface 134 </ b> D of the fixed-side guide protrusion 134. Then, the inclined surface 136D of the detachable side protrusion 136 hits the inclined surface 132E of the fixed side protrusion 132, the detachable side protrusion 136 is guided by the inclined surface 132E, and the detachable side protrusion 136 fits into the recess 132L.

  As mentioned above, although the form for implementing this invention was demonstrated, the said embodiment is for making an understanding of this invention easy, and is not for limiting and interpreting this invention. The present invention can be changed and improved without departing from the gist thereof, and equivalents thereof are also included in the present invention.

  In the above embodiment, the detachable portion 120 is attached to and detached from the fixed portion 110 by pulling up the detachable portion 120 with the rope 32. On the other hand, you may comprise so that the attachment / detachment part 120 may be attached or detached with respect to the fixing | fixed part 110 by pushing up the attachment / detachment part 120 with a stick | rod.

  DESCRIPTION OF SYMBOLS 1 ... Arm bracket, 10 ... insulator defacement investigation device, 20 ... pilot insulator, 30 ... operation mechanism, 32 ... rope (linear member), 34, 36 ... pulley, 38 ... spring (biasing member) 39 ... spring, 100 DESCRIPTION OF SYMBOLS ... Holding device, 110 ... Fixing part, 112 ... Lid part, 112A ... Hole, 120 ... Detachable part, 122A, 122B ... Lid part, 130 ... Locking mechanism (detaching mechanism), 132 ... Fixed side protrusion, 132A, 132B ... Side surface, 132C, 132D, 132E, 132F ... inclined surface, 132G ... corner, 132H, 132I, 132J ... corner portion, 132K ... regulating surface, 132L ... concave portion 134 ... fixed side guide projection, 134A, 134B ... inclined surface , 134C ... corner of entry, 134D ... regulating surface, 136 ... detachable side projection, 136A, 136B ... side, 136C, 136D ... Slope, 136E, 136F ... corners

Claims (7)

A detachable holding device that detachably holds the pilot insulator at a high installation position,
A cylindrical fixing portion fixed so that the opening end is positioned on the lower side at the installation position;
A column-shaped attaching / detaching portion arranged coaxially with the fixing portion, holding the pilot insulator, inserted into the fixing portion from below, and coming out from the fixing portion;
The detachable part inserted into the fixed part is rotated around its axis and guided to a predetermined holding position, and the detachable part raised from the predetermined holding position is rotated around its axis to be predetermined. A detachable mechanism for guiding to a lowered position of
A holding device. The attachment / detachment mechanism is
A plurality of detachable side protrusions provided on the outer peripheral surface of the detachable portion at predetermined intervals in the circumferential direction;
A plurality of fixed-side protrusions provided on the inner peripheral surface of the fixed portion so as to form spaces in the circumferential direction at the same intervals as the plurality of attachment-and-detachment-side protrusions and through which the attachment / detachment-side protrusions can pass; ,
A fixed guide projection provided at the same interval as the plurality of detachable projections above the fixed projection on the inner peripheral surface of the fixed part;
With
The detachable side projection is formed with upper and lower inclined surfaces inclined opposite to each other,
Two inclined surfaces that are aligned in the circumferential direction and inclined opposite to each other are formed at the lower portion of the fixed-side protrusion, so that the circumferential central portion of the lower portion of the fixed-side protrusion is convex downward,
On the upper part of the fixed side protrusion, two inclined surfaces that are aligned in the circumferential direction and are parallel to each other, and a first corner where the acute corner on the lower side of the detachable side protrusion fits are the fixed side protrusions. It is formed so that it can be in the center in the circumferential direction at the top of the
The fixed-side guide protrusions have an inclined surface parallel to each other and inclined in the opposite direction to the inclined surface on the upper side of the fixed-side protrusion and arranged in the circumferential direction at an acute angle above the detachable-side protrusion. The second fitting corner part into which the part fits is formed so as to be at the center part in the circumferential direction of the fixed side guide projection part,
The holding device according to claim 1, wherein the fixed-side guide protrusion is disposed so that the inclined surface of the fixed-side guide protrusion is positioned on the upper edge of the upper inclined surface of the fixed-side protrusion. .   A concave portion into which the detachable side projection portion is fitted is formed on the other inclined surface side of one of the two inclined surfaces of the fixed side projection portion, and the first corner is formed at the bottom of the concave portion. The holding device according to claim 2.   The holding device according to any one of claims 1 to 3, further comprising a linear member having one end attached to an upper portion of the attachment / detachment portion for lifting the attachment / detachment portion.   The holding | maintenance apparatus of Claim 4 provided with the pulley which rolls the other end side of the said linear member below.   The holding device according to any one of claims 1 to 5, further comprising a biasing member that is disposed between an upper portion of the detachable portion and an upper portion of the fixing portion and biases the detachable portion downward. . The holding device according to any one of claims 1 to 6,
The pilot insulator held by the holding device;
An insulator defacement survey device comprising:

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