JP2015144753A - Automatic opening/closing-type safety hook - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an automatic opening/closing-type safety hook capable of being easily used and capable of being applied even to different types of steps for ascent/descent, mainly so as to prevent a worker from falling when walking up/down the steps for ascent/descent, during high place work.SOLUTION: In an automatic opening/closing-type safety hook, an anti-coming-off device using an opening/closing element (3) for being automatically opened/closed by the action of gravity is provided in an opening (9) of a groove of the safety hook assuming a shape for capturing a locked object by the semicircular groove composed of a concentric circle, which is described in Patent Application Publication No. 3179982 of a registered utility model applied for by the applicant.

Description

The present invention relates to a safety hook that is used to prevent a worker from falling when moving up and down mainly at a step for raising and lowering in high places.

Elevating equipment for work in high places is a bolt-shaped step used for utility poles, an upright ladder using a round bar for the step, and the round bar is shaped like a `` U '' and directly on the building wall or tower-like equipment side There are installed steps, etc., and as a means for ensuring safety when ascending and descending, equipment such as a lifting and lowering technology and a rail for a fall prevention device is provided.

Moreover, although the safety hook used as a means to ensure the safety | security at the time of raising / lowering is described in patent document 1, patent document 2, and patent document 3, respectively, the difference of a structure with this invention is large.

Utility Model Publication No. 05-62270 Utility Model Publication No. 7-28569 Registered Utility Model No. 3000252 Registered Utility Model No. 3179982

Conventionally, safety hooks used for raising and lowering to high places and working at high places have been provided with devices to prevent them from coming out of the locked objects. It has a structure that combines complex parts to move it. Therefore, it requires lever operation etc. every time it is attached to or detached from the locking object, and it is not convenient to use. With the increase, the manufacturing cost is also high.

Also, with regard to lifting equipment that can ensure safety by using lifting and lowering technology such as utility poles, if there are obstacles in the middle of lifting and lowering, secure a safety fulcrum using an auxiliary rope separately from the main rope to be turned A series of complicated rope operations and safety hook operations such as later releasing the lock by the rope temporarily, overcoming obstacles, and changing the rope again must be performed frequently. The risk of a crash due to a mistake in checking the degree of engagement increases.

Other elevators installed on upright ladders, building walls, side walls of towers, etc., are difficult to secure by turning up and down technology, and in many cases no other crash prevention devices are installed. However, there is no universal safety hook that can be adapted to these, and even in facilities where rails for fall prevention devices are installed, it may not be used in cold areas due to icing snow. However, there is no alternative safety hook.

The fall-preventing safety hook of the registered utility model No. 3179882 filed by the present applicant is provided with a function to prevent it from coming off from the locking object due to the balance of the shape and weight of the safety hook. Because it does not have a stop device, it is unnatural for a safety hook due to an unstable posture during ascending / descending, accidental movement due to an idea, or unexpected unexpected movement such as sliding a limb. Since the possibility of falling off when a certain movement is added is not zero, the present invention is made to solve these problems, which is limited to only a few auxiliary uses in use. .

The automatic open / close safety hook of the present invention is an improvement of the safety hook of the registered utility model No. 3179882 filed by the present applicant, in which the locking object is captured by a semicircular groove made of concentric circles, and is applied by the action of gravity. It is characterized by the fact that a locking device that operates automatically is attached.

The automatic opening / closing type safety hook detachment preventing device of the present invention has an opening / closing piece (3) attached to the lower end (10) of the opening of the groove of the safety hook body (1) shown in FIGS. 2 (A), (B) and (C). ) And the opening / closing piece mounting shaft (4), and the shape of the opening / closing piece mounting portion (6) is such that the movable range of the opening / closing piece (3) is within the closed position (11 ).

The shape of the opening / closing piece (3) is, as shown in FIG. 2 (B), a shape that closes the opening (9) of the groove along the concentric circular groove of the safety hook body, and the opening / closing piece head In order to increase the action of gravity, (5) increases the weight within a range that does not protrude from the thickness of the safety hook body (1) and gives weight.

When attaching / detaching the automatic opening / closing safety hook to the lifting / lowering step, as shown in FIG. 3 (A), the opening / closing piece (3) is housed in the bottom (8) of the groove, and the opening (9) of the groove. Next, when the automatic opening / closing safety hook is pulled up through the rope hole (12) by the operator's lifting operation, the automatic opening / closing safety hook is as shown in FIG. The opening / closing piece (3) starts to rotate counterclockwise around the lifting / lowering step (14) captured by the tip (7) of the groove as a central axis. 3 is directed clockwise to rotate around the opening / closing piece mounting shaft (4) as a center point to close the groove opening (9) shown in FIG. 3 (C). It reaches.

At the time when the opening (9) of the groove is closed, the automatic opening / closing safety hook is kept in the state where the tip of the groove (7) continues to catch the lifting step, but as shown in FIG. When the automatic opening / closing safety hook is rotated beyond the limit of holding the lifting / lowering step at the tip (7) of the groove and the force to lift the automatic opening / closing safety hook is released, FIG. 4 (B) As shown in Fig. 5, the automatic opening / closing safety hook slides on the lifting step along the concentric groove (2) into the groove bottom (8). At this time, the groove opening (9) The present invention is an automatic opening / closing safety hook having the above-described configuration, which is closed by the opening / closing piece (3) and is prevented from coming off from the lifting step.

The opening of the groove is automatically opened when attaching / detaching to the lifting / lowering step, and the operator does not need to operate it by himself / herself. , Ensuring quick safety.

By using the two automatic opening / closing safety hooks of the present invention as a set, as shown in FIGS. 5 (A), (B), and (C), the locked state is always secured alternately left and right. Even if there are obstacles on the way, normal natural lifting that captures the lifting steps alternately left and right without the need for special technical operations such as frequent rope operation and hook operation with high risk of risk performed by turning up and down technology It is easy to move up and down over obstacles.

It can be applied to upright ladder raising / lowering steps that have not been equipped with effective fall prevention equipment so far, as well as lifting steps that are directly attached to the walls of buildings and towers, etc. Even when other crash prevention devices or the like cannot be used, safety can be ensured by substituting the automatic opening / closing safety hook of the present invention.

Since the action of gravity is used as a means to operate the locking device, there is no mechanical failure factor such as a spring, stable operation is guaranteed, and the simple structure greatly reduces manufacturing costs. Can also be achieved.

It is a perspective view of this invention safety hook. It is a shape figure of this invention safety hook, (A) Front view (B) It is a front and side shape figure of an opening-and-closing piece, (C) It is an exploded perspective view showing the shape of an opening-and-closing piece attachment part. Operation diagram of the safety hook of the present invention: (A) State of being hooked on the lifting step when attaching and detaching (B) Progress in the state of being pulled up vertically via the rope (C) State of being pulled up vertically via the rope Is shown. In the operation diagram when it is lifted beyond the normal use range (A) Limit that the lifting step cannot be caught at the tip of the groove of the safety hook body (B) Lifting step cannot be caught at the tip of the groove (C) The state where it slipped into the bottom of the groove (C) The state where the pulling-down force was applied via the rope from the state where the raising / lowering step was caught at the bottom of the groove. It is an image figure for explanation at the time of using it with an upright ladder, (A) Engagement state of the automatic opening-and-closing safety hook of the present invention (B) (C) It is a perspective view which piled up the raising and lowering operation of an operator.

The automatic open / close safety hook of the present invention is an improved safety hook having a shape in which a latching object is captured by a semicircular groove formed by a concentric circle according to the registered utility model No. 3179882 filed by the applicant, and is automatically operated by the action of gravity. It is characterized by the fact that an anti-slip device that operates automatically is attached.

2A, 2 </ b> B, and 2 </ b> C for explaining the operation mode of the automatic opening / closing safety hook detachment prevention device of the present invention, the detachment prevention device shown in FIGS. 10), the opening / closing piece (3) operated by gravity and the opening / closing piece mounting shaft (4).

Also, the shape of the opening / closing piece mounting portion (6) of the safety hook body to which the opening / closing piece (3) is attached is as shown in the perspective view of FIG. 2 (C) when the opening (9) of the groove is closed. In addition, a stopper function is provided to stop the movement of the opening / closing piece (3) at the closing position (11) of the opening / closing piece shown in FIG. 2 (A) on the inner line of the concentric groove (2). It has a shape.

As shown in FIG. 2B, the shape of the opening / closing piece (3) is a concentric shape that compensates for the space of the opening (9) of the groove of the safety hook body, and the opening / closing piece head (5) In order to increase the effect, the safety hook body (1) is swelled in a range that does not protrude from the thickness of the safety hook body (1) and is given weight.

When attaching / detaching the automatic opening / closing safety hook to / from the lifting / lowering step, as shown in FIG. 3 (A), the opening / closing piece (3) is housed in the bottom (8) of the groove, and the opening (9) of the groove Next, when the automatic opening / closing safety hook is pulled up through the rope hole by the operator's lifting operation, the automatic opening / closing safety hook is moved into the groove as shown in FIG. The counterpiece (3) begins to rotate counterclockwise around the lifting step (14) captured by the tip (7) of the head, and at the same time the opening / closing piece (3) Since it tries to stop on the vertical line as it faces downward, it apparently rotates clockwise with the opening / closing piece mounting shaft (4) as the center point, and the groove opening (9) is closed as shown in FIG. It leads to.

From the state where the automatic opening / closing safety hook of FIG. 3 (A) is hooked on the lifting / lowering step, it is pulled up vertically through the ropes of FIGS. 3 (B) and 3 (C), and the opening (9) of the groove is closed. Until then, the automatic open / close safety hook keeps catching the lifting step at the groove tip (7), and if the tension from the rope is released during this time, the automatic open / close safety hook body is concentric The automatic opening / closing safety hook shown in FIG. 3 (A) is returned to the original position where it is hooked on the lifting / lowering step due to the balance between the shape and weight.

When the automatic opening and closing safety hook is pulled up to the vertical direction via the rope and the groove opening (9) is closed, the automatic opening and closing safety hook keeps catching the lifting step at the groove tip (7) However, as shown in FIG. 4 (A), it is rotated beyond the limit of holding the lifting step at the tip (7) of the groove, and the lifting force through the rope is released. In this case, as shown in FIG. 4 (B), the automatic open / close safety hook slides on the lifting step along the concentric groove (2) into the groove bottom (8). At this time, the opening (9) of the groove is kept closed by the opening / closing piece (3), so that it is prevented from coming off from the lifting step.

In addition, when a force for pulling downward is applied via a rope from the state where the lifting step is captured at the bottom (8) of the groove shown in FIG. 4 (C), the tip of the concentric groove At this time, the step (14) for raising and lowering apparently passes while closing the opening / closing piece (3) against the opening (9) of the groove. And slipping off is prevented.

Furthermore, by providing the setting position of the opening (9) of the groove of the automatic opening and closing safety hook closer to the bottom (8) of the concentric groove, as shown in FIGS. As shown in FIGS. 4 (A) and 4 (B), the closed state of the groove opening (9) is completed at an early stage when it is pulled up in the vertical direction. The present invention is an automatic opening and closing type safety hook having the above-described configuration.

Although the embodiment using the automatic opening / closing safety hook of the present invention will be described, the present invention is not limited only to the description and procedure.

The automatic opening / closing safety hook of the present invention is used by being connected to a worker's safety belt, and secures a safety fulcrum by hooking the opening (9) of the groove toward the front to the lifting step.

The operation of lifting and lowering using the automatic opening and closing safety hook of the present invention will be described with reference to FIGS. 5 (A), 5 (B) and 5 (C). As for the operation, the natural lifting operation is repeated alternately left and right alternately by hooking the automatic opening / closing safety hook to the next lifting step to be gripped and attaching the hand to the hooked automatic opening / closing safety hook and gripping the lifting step. In this operation, one of the left and right hands always holds the hand on the automatic opening and closing safety hook and holds the lifting step, so that the locked state is also maintained at the same time. Since it can be checked at the same time, the safety of the automatic opening-and-closing safety hook can be confirmed at the same time, so safety during lifting is increased, and even if there are obstacles in the middle of lifting, you can get over one by one, so this rope of Without using the only place and the auxiliary rope, etc., it can be overcome easily with the normal of the lifting operation, sufficient safety is ensured.

Up to now, upright ladders using round bars for lifting steps, lifting steps that are directly attached to the walls of buildings and towers, etc., with round bars shaped like a `` U '', ensure safety by turning up and down technology. The automatic open / close safety hook of the present invention, which is difficult to perform and often has no crash prevention device, can be applied to these lifting steps, and thus can contribute to a wide range of safety work.

If the lifting equipment provided with the rails for the fall prevention device cannot be used due to icing snow or the like in the winter, the automatic open / close safety hook according to the present invention can be substituted to ensure safety.

Since the automatic open / close safety hook according to the present invention has a simple structure when manufactured, the cost can be greatly reduced, and the spread can be promoted.

Regardless of the existing or newly installed lifting equipment, if the lifting equipment can apply the automatic opening and closing safety hook of the present invention, there is no need to install a new fall prevention device, etc. Can also be reduced.

DESCRIPTION OF SYMBOLS 1 Safety hook main body 2 Groove part 3 Opening / closing piece 4 Opening / closing piece attachment shaft 5 Opening / closing piece head 6 Opening / closing piece attachment part 7 Groove tip 8 Groove bottom 9 Groove opening 10 Groove opening lower end 11 Opening / closing Position for closing piece 12 Hole for rope 13 Rope 14 Step (step bolt)
15 Upright ladder 16 steps (for upright ladder)

Claims (1)

An automatic opening / closing type safety hook comprising an opening / closing piece (3) that opens and closes automatically by the action of gravity in an opening (9) of the groove of the safety hook.

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