JP3179982U - Safety hook for crash prevention - Google Patents

Abstract

An object of the present invention is to eliminate the complicated mechanism and a plurality of parts used for the conventional safety hook, and to give the hook body a function to prevent the locking by combining the shape of the hook and the weight balance. Providing safety hooks that do not require much trouble and are free from malfunctions and operational errors.
The safety hook main body 1 has a shape that catches a locking object with a semicircular groove made of concentric circles, and a weight balance such as the width and length of the groove and the position and angle of the rope connecting hole. By combination, the safety hook body 1 is provided with a detachment prevention function.
[Selection] Figure 1

Description

  The present invention relates to a safety hook that prevents a worker from falling when ascending and descending a utility pole, a steel pipe pole, a steel tower, or the like.

Conventionally, when moving up and down to utility poles, steel pipe columns or steel towers, etc., if there is an obstacle in the middle of lifting up and down by a hanging hook using a safety rope parent rope, an auxiliary rope and safety hook separate from the parent rope Use safety etc. to secure safety, cancel the turning hook once, get over the obstacle, and then change.

Utility Model Publication 7-28569 Patent Publication 2007-117573

  There are many obstacles when ascending and descending to utility poles, steel pipe columns, steel towers, etc., such as electric wires, cables, branch lines, signboards, steel tower members, etc. In the safety hook, a plurality of operations such as release of the lock lever and opening / closing of the hook detachment prevention mechanism must be performed at the same time, which requires time and effort and a risk of a crash due to an operation error.

  In addition, the conventional safety hook is composed of a complicated mechanism such as a lock lever and an opening / closing lever for preventing detachment and a plurality of parts. The present invention has been made in order to solve the problems related to the safety hook.

In order to solve the problem, the hook of the present invention eliminates the mechanical detachment prevention mechanism such as the lock lever in the conventional safety hook, and provides a detachment prevention function from the locking object by combining the shape of the hook and the weight balance. It is about to try.

  The shape and operation mode of the hook of the present invention will be described. The shape (FIG. 2 (A)) is such that the locking object is captured by a semicircular groove made of concentric circles, and the center (5) of the tip of the groove is The angle (7) connecting the three points of the center (8) of the concentric circle of the groove and the center (4) of the rope hole is more than 180 degrees. (B)) In the state where it is hooked on the locking object, the locking object is caught even when the rope (9) is pulled up vertically until the locking object is caught at the tip (5) of the groove. When the rope (9) is released and released in this state while being held at the tip (5) of the groove, it returns to the initial hooked state due to the weight balance.

  Next, although it cannot be a normal use state, an operation form when it is pulled up beyond the vertical by some momentum (FIGS. 4A and 4B) will be described. When it is released, if it exceeds the range where it can be returned to the initial state in the weight balance, it slides into the bottom part of the groove (6). At this time, the bottom part of the groove (6) catches the locking object. In order to prevent the opening (3) from slipping out of the opening (3) when sliding into the bottom (6) of the groove, the position of the opening (3) is the center of the groove (2). And is provided near the bottom (6) of the groove, so that it can be accommodated without touching the opening (3) when slipping in, thereby realizing the function of preventing detachment.

  Further, when the hook of the present invention is used with a step bolt, the width of the groove (2) and the opening (3) is set to a step bolt head (11) in order to prevent the step bolt from falling off from the head (11) side. ) Is smaller than the diameter.

  There is no need to operate the lock lever or open / close lever, and it can be used with a simple operation just by hooking it, so the operation when getting over obstacles in the middle of lifting and lowering can be simplified. Can be planned.

  Since there are no moving parts used in lock levers, open / close levers, etc., there is no failure, and a simple structure can greatly reduce costs.

  When working at a high place, safety is secured with a parent rope of a safety belt. However, a plurality of safety can be secured by using the hook of the present invention in combination, and a more reliable fall prevention effect can be provided.

It is a perspective view at the time of using this invention hook with a step bolt. (A), (B), and (C) are a front view, a1-a2 sectional view, and a b1-b2 sectional view, respectively, of the hook of the present invention. (A) and (B) are operation diagrams when the hook of the present invention is used, respectively, showing a hooked state and a vertically lifted state. (A) and (B) are operation diagrams when the inventive hook is pulled up beyond the vertical, and shows the state where the hook is pulled up beyond the vertical and the state where the tension is released and slipped into the bottom of the groove. It is. (A), (B), and (C) are explanatory diagrams when the hook of the present invention is used, and show a utility pole, a steel pipe column, and a vertical ladder, respectively.

  The hook of the present invention is characterized in that a mechanical locking mechanism such as a lock lever in a conventional safety hook is abolished and the hook body has a locking function by a combination of the hook shape and weight balance. is there.

  The first feature of the hook prevention function of the present invention is that the shape (FIG. 2 (A)) is such that the locking object is caught by a semicircular groove made of concentric circles, and the center of the groove tip (5 ) And the center (8) of the concentric circle of the groove and the center (4) of the rope hole, the angle (7) is more than 180 degrees. (A), (B)) In the state of being hooked on the locking object, the locking object is caught at the end (5) of the groove, and then locked even if the rope (9) is pulled up vertically. The object is held while being caught at the tip (5) of the groove, and when the tension of the rope (9) is released and released in this state, it returns to the initial hooked state due to the weight balance.

  Next, the second feature of the anti-slip function is to provide the anti-skid function even during operation that exceeds the normal operating range, and its operation mode will be described (FIGS. 4A and 4B). When the rope (9) is pulled up to an angle exceeding the angle, the catch (5) continues to catch the locking object, but if the tension is released and released, the weight balance If it is beyond the range that can be returned to the initial hooked state, it slides into the bottom (6) of the groove due to the same weight balance, but at this time, the bottom (6) of the groove is sufficient to catch the locking object. The shape of the opening (3) is removed from the center of the groove (2) so that it has a depth and does not come out of the opening (3) when sliding into the bottom (6) of the groove. Provided near the bottom (6) of the groove to touch the opening (3) when sliding The shapes Suberikomeru the bottom of the groove (6) without, thereby realizing the function of the latch in unexpected operating conditions.

  Third, when using the hook of the present invention with a step bolt, the width of the groove (2) and the opening (3) is set to a step bolt in order to prevent the step bolt from falling off from the head (11) side. By making it smaller than the diameter of the head (11), the anti-separation function is realized.

  The embodiment using the hook of the present invention will be described. However, the present invention is not limited to the description and procedure.

  The hook of the present invention is used by being connected to the worker's safety belt, and secures the safety fulcrum by hooking the opening (3) toward the front side with the locking object.

  When climbing over obstacles that are in the middle of raising and lowering by hooking, the safety fulcrum is secured by hooking on the hooked object over the hook of the present invention.

  In the case of steel pipe columns or tower vertical ladders (Figs. 5 (B) and 5 (C)), which are difficult to secure by turning up and down, use the two hooks of the present invention as a set, and the left and right hands when moving up and down In accordance with the movement of the next step, hook the device to the next step and catch the same step with your hand. There is no need for a special operation because the locked state is always maintained, and when climbing over an obstacle that is being lifted or lowered, it is only necessary to climb over one of the left and right sides.

  In the lifting equipment such as utility poles, steel pipe pillars or steel towers, the hook of the present invention is easy to use and ensures reliable safety regardless of whether it is lifted or lowered by turning. Therefore, it can be used effectively.

  Since the hook of the present invention is simple in manufacturing, the cost can be greatly reduced, and the spread can be promoted.

DESCRIPTION OF SYMBOLS 1 Hook main body 2 Groove part 3 Opening part 4 Rope hole 5 Groove tip part 6 Groove bottom part 7 Angle which connects 3 points | pieces of the center of a groove tip center with the center of a groove tip 8 and the center of a rope hole 9 Rope 10 Step bolt 11 Step bolt head 12 Electric pole 13 Steel pipe pillar 14 Step (U-shaped round bar)
15 Ladder main girder 16 steps (round bar)
a1-a2 Hook body groove section b1-b2 Hook body rope hole section

Claims (3)

  A hook structure characterized by the shape of catching a locking object with a semicircular groove made of concentric circles.   2. The hook structure according to claim 1, wherein a hole for connecting the rope independently of the groove is provided at a lower end of the semicircular groove for catching the locking object.   The hook structure according to claim 1, wherein an opening for capturing the locking object is provided near the lower end of the semicircular groove.

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