JP2006305056A - Locking metal hook for elevated place - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve a problem that a drop optical fiber communication wire may be cut by being locked to an engagement groove at the tip of a hook part and the operability of the work may be lowered by requiring a meticulous care. <P>SOLUTION: This locking metal hook for an elevated place is provided with a hook part 2 having a locking space 1 in its upper part, a hook body 4 having an annulus part 3 in its lower part, an opening/closing cap 5 pivoted to the hook body 4, and a connecting bar 6 connected to the opening/closing cap 5 and having a suspension annulus part 7 projecting to the body back side; and the back face of the hook body 4 is provided with a sliding material 41 in the upper part and a locking pin 42 in the lower part to regulate the vertical turning of the connecting bar 6. A connecting shaft 62 rotationally connecting the opening/closing cap 5 to the connecting bar 6 is provided with a guide member 8 adjacent to the engagement groove 21 at the tip of the hook part 2 engaging the locking space 1 in closing, and the outer face 81 of the guide member 8 is disposed in a position similar to the inside face 22 at the tip of the hook part 2 or a projecting position to prevent the intrusion of the narrow-diameter communication wire in the engagement groove 21. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present application relates to a hook for hooking a high place provided on a fall prevention device installed by a high place worker to prevent the fall.

As a hook fitting for high places, there is one disclosed in Japanese Patent Publication No. 5-8027.
This is because the fall prevention rope can be easily installed by operation from the ground, and is accepted by the market and used at the time of construction of each communication line.

However, the current situation is that communication lines are becoming more complicated due to recent IT.
In other words, not only the existing metal communication line but also the extension due to the increase in the number of lines and the new installation of the optical fiber communication line make the vicinity of the utility pole very complicated.
In addition, a small diameter drop optical fiber communication line wired from the optical fiber communication line to each home is installed along with the existing metal communication line.
Therefore, recently, existing support lines, metal communication lines, additional metal communication lines, optical fiber communication lines, and drop optical fiber communication lines are bundled using a spiral hanger.
Japanese Patent Publication No. 5-8027

Hook hooks for high places are used by hanging on support lines and metal communication lines. However, since conventional support and metal communication lines to be hooked were thick, hooks for high place hooks were used. It was not caught in the fitting groove at the end of the flange of the metal fitting.
Recently, however, the metal hanger and optical fiber communication lines are bundled by the spiral hanger R, and the small diameter drop optical fiber communication line in the hanger R is attached to the tip of the hook of the hook bracket for high place when attaching and removing. There is a risk of being caught by the fitting groove and being cut, and the operability is lowered because it is performed with great care.

Therefore, in the present application, the guide member 8 is provided at the distal end portion of the flange portion 2 of the hook for hooking at high places so as not to be caught in the fitting groove 21 of the flange portion 2.
Specifically, the connecting shaft 62 that rotatably connects the opening / closing cap 5 and the connecting bar 6 is provided in the vicinity of the fitting groove 21 at the distal end portion of the flange portion 2 that fits when the latching space 1 is closed. The outer surface 81 of the guide member 8 is arranged at a position that is equal to or protrudes from the inner surface 22 at the tip of the flange 2, so that a small-diameter communication line does not fit into the fitting groove 21.

As described above, in the present application, by providing the guide member 8, the drop optical fiber communication line D is not caught and the operability is improved.
In addition, when the hook metal fitting for hanging at a high place is lifted, the guide member 8 is in contact with the metal communication line C, and the hook metal fitting is positioned at right angles to the metal communication line C. It can be carried out.

Detailed examples of the present application:
A hook 2 having a hooking space 1 capable of hooking a support wire bundled by a spiral hanger R, a metal communication line C, and the like is provided above, and a retractable lifeline 9 and a rope are connected below. A hook body 4 having a ring portion 3 that can be formed is formed, an opening / closing cap 5 pivoted on the hook body 4 so as to be able to open and close the hooking space 1, and an opening / closing cap 5 connected to the opening / closing cap 5. A connecting bar 6 having a projecting hanging ring portion 7 is provided, and a sliding member 41 that restricts upward rotation of the connecting bar 6 and slides the connecting bar 6 on the upper rear side of the hook body 4. Similarly, in the lower part, the opening / closing cap 5 is brought into contact with the latching portion 61 of the connecting bar 6 for fixing the latching space 1 of the hook body 4 in the closed state, and the latching pin for restricting the downward rotation 42 is a hook bracket for high place hooks, and is a link that rotatably connects the open / close cap 5 and the connecting bar 6. The shaft 62 is provided with a guide member 8 in the vicinity of the fitting groove 21 at the distal end of the flange 2 where the latching space 1 is closed, and the outer surface 81 of the guide member 8 is equivalent to the inner surface 22 of the distal end of the flange 2. Alternatively, it is arranged at a projecting position so that a small-diameter communication line such as the drop optical fiber communication line D does not fit into the fitting groove 21.

As shown in FIGS. 3 and 4, the guide member 8 is obtained by applying a resin coating using a steel plate, and is provided symmetrically at the front end of the flange and riveted.
In the drawing, the guide member 8 is formed of a steel plate, but it may be a round bar steel, and the outer surface 81 of the guide member 8 is disposed at a position where the outer surface 81 is equal to or protrudes from the inner surface 22 at the tip of the flange 2. If it is.

An example of a method of using the hook bracket for hooking a high place of the present application will be described.
In the case of FIGS. 6 and 7 in which a retractable lifeline 9 is provided on the lower ring part 3, the hook H at the end of the lifeline is attached to the lower part of the utility pole (root) or hung on the ring of the safety belt worn by the operator. Stop and hang the end fitting of the extension rod S on the hanging ring portion 7 of the hook body 4 and extend the extension rod S. When the end fitting of the extension rod S is removed from the hanging ring portion 7, the opening / closing cap 5 is rotated to the tip end portion of the hook portion 2 by a spring to close the hooking space 1, and the hook portion 61 of the connecting bar 6 is engaged. The stopper pin 42 is engaged with the stopper pin 42 to prevent inadvertent rotation of the opening / closing cap 5.
Thereafter, the telescopic rod S is shrunk and stored, and the operator ascends to the work position of the utility pole. At that time, even if the limb is slipped from the step bolt and dropped, the narrow woven belt of the retractable lifeline 9 is suddenly pulled and the drum rotates, and the built-in locking claw rotates by centrifugal force. Then, it is locked to the locking teeth to prevent the drum from rotating, and stops with a minimum drop distance.
For removal, the operator who descends to the ground extends the telescopic rod S again, hooks the end fitting of the telescopic rod S to the hanging ring portion 7, and lifts the opening / closing cap 5 to lift the hanging space 1. And can be easily removed from the bundled metal communication line C and drop optical fiber communication line D. Then, the telescopic rod S is contracted to complete the withdrawal.

When the parent rope is directly provided in the lower ring part 3, the extension ring S is attached to the hanging ring part 7 of the hook body 4, the extension hook S is extended, and the bundled metal communication line C, drop When the hook part 2 is hooked to the optical fiber communication line D, and the end fitting of the extension hook S is removed from the hanging ring part 7, the opening / closing cap 5 is rotated to the tip part of the hook part 2 by a spring, and the hooking space 1 is closed. A latching portion 61 of the connecting bar 6 is latched on the locking pin 42 to prevent inadvertent rotation of the opening / closing cap 5.
After that, the telescopic rod S is retracted and stored, and the operator attaches the lower end of the main rope to the lower part of the utility pole, attaches the rope gripping bracket, and the operator wears a hook provided at the tip of the rope gripping bracket. It is hung on the ring and moved up to the working position. At that time, even if the limb is slipped by a step bolt and dropped, the parent rope is gripped by the rope gripping bracket to prevent the fall.
For removal, the telescopic rod S is extended again as described above, and the end bracket of the telescopic rod S is hooked on the hanging ring portion 7, and when it is lifted, the open / close cap 5 can be rotated to open the hooking space 1. The bundled metal communication line C and drop optical fiber communication line D can be easily removed. Then, the telescopic rod S is contracted to complete the withdrawal.

The front view of the hook metal fitting for hooking a high place of the present application. The left view of the hook metal fitting for a high place latch of this application. The front view of the front-end | tip part of the collar part of the hook metal fitting for a high place latch of this application. The right view of the front-end | tip part of the collar part of a hook metal fitting for a high place latch of this application. FIG. 3 is a front elevation view of a hook bracket for hooking a high place of the present application. The attachment state front view of the hook bracket for hooking a high place of the present application. The right side view of the mounting state of the hook bracket for hooking a high place of the present application.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Latching space 2 Gutter part 3 Ring part 4 Hook main body 5 Opening / closing cap 6 Connection bar 7 Hanging ring part 8 Guide member 9 Winding type lifeline
21 Mating groove
22 Inside
41 Sliding material
42 Locking pin
51 pivot
61 Hook
62 Connecting shaft
81 Outer surface C Metal communication line D Drop optical fiber communication line H Hook R Spiral hanger S Stretchable rod

Claims (1)

  A hook body 4 having a hook portion 2 having a hooking space 1 that can be hooked on a support line, a communication line, etc. on the upper side and a ring portion 3 that can be connected to a retractable lifeline 9 and a rope on the lower side is provided. An opening / closing cap 5 that is formed and pivoted 51 so as to be able to open and close the hooking space 1 in the hook body 4, and a connecting ring portion 7 that is connected to the opening / closing cap 5 and protrudes from the back side of the body A bar 6 is provided, and a sliding member 41 that restricts upward rotation of the connecting bar 6 and slides the connecting bar 6 is provided on the upper back side of the hook body 4. The hook metal fitting for hooking at a high place provided with a locking pin 42 that abuts on the hooking portion 61 of the connecting bar 6 that fixes the hooking space 1 of the hook body 4 in a closed state and restricts the downward rotation. The connecting shaft 62 that rotatably connects the open / close cap 5 and the connecting bar 6 is fitted to the hook 2 at the end of the hook space 1 when it is closed. A guide member 8 is provided in the vicinity of the fitting groove 21 at the end, and the outer surface 81 of the guide member 8 is disposed at a position that is equal to or protrudes from the inner side surface 22 at the distal end of the flange portion 2. Hook bracket for high places, characterized by a structure that does not allow communication lines to be inserted.

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