JP2010075597A - Safety belt for tree-climbing - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the two problems which are serious matters of life or death when working alone in the mountains through the use of the conventional safety belt for forest industry together with a "gani" (metal fitting) tool, i.e., (1) a worker sometimes fall since a rope arranged around a tree is kept loosened when the pawls of the "gani" unexpectedly come off the tree during climbing the tree and working in stop; and (2), when the "gani" unexpectedly comes off, the rope is made to be diagonal by body weight so as to make the body be drawn toward the tree even when the rope is luckily caught at the outer periphery of the tree so as to prevent the fall, so that the worker is not restored alone. <P>SOLUTION: A fall prevention aid is hooked to the safety belt for tree-climbing so as to connect the right and left parts on the side closer to the tree of the rope stretched between the tree and the human body. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

The present invention relates to a fall prevention assisting tool having fall prevention by cooperation with a forestry safety belt during raising and lowering of a tree and during work on the tree.

As a climbing tool, a method of using a bracket with a claw (hereinafter referred to as a crab) to be attached to a foot and a forestry safety belt as in Patent Document 1 is generally used. When the iron claws of the crabs are detached from the tree or when the rope hanging on the tree is lifted up and down with both hands, it takes too much time for the rope to loosen, and the rope tension is lost, causing a crash.
As a method for preventing a fall, there is a method of holding a scaffold member and a fall prevention belt on a tree with a tightening belt at a certain height as described in Patent Document 2, but it is widely used because there are many components and the amount of work increases. It has not been used.
JP 2004-229629 A JP 2006-239183 A

The combined use of forestry safety belts and crabs as general climbing equipment has the following two problems.
(1) When the crab claws are removed from the tree at an unexpected time during climbing or stopping of the tree, the rope arranged around the tree may be loosened and crashed.
(2) Similar to the above, when the crab's claws come off unexpectedly, even if the rope is luckyly caught on the outer periphery of the tree and escaped the fall, the rope became slanted by weight and the body was drawn to the tree Therefore, there are many cases where one person cannot return. This was a serious problem related to life and death when working alone in the mountains.
The present invention has been made to solve the above problems.

The present invention solves the above problem by hanging a fall-preventing auxiliary tool on a conventional tree safety belt so as to connect the left and right sides of the rope stretched between the tree and the human body.

Wrap a lightweight and simple structure auxiliary tool so that the left and right sides of the rope hung on the tree are lightly bundled, and just hook the hook attached to the string on the rope, it is tremendous in climbing trees using a forestry safety belt Demonstrate the effect of preventing crashing.
It is lightweight and easy to carry, and it is very simple and easy to attach and detach auxiliary tools and operate on trees.

  When a tree-climbing worker is about to fall while climbing or stopping the tree, the auxiliary tool of the present invention causes the worker to hang on the tree, but returns to the original posture from that state by himself. I can do it.

Conventionally, considerable skill was required to work on the tree, but by using the assisting tool and safety belt according to the present invention, the work on the tree can be performed safely and safely even if inexperienced. Can be done with heart.

The use method of the safety belt and the fall prevention aid based on the configuration of the best mode for carrying out the present invention will be described below with reference to FIGS.
The rope 4 arranged on the outer periphery of the tree is connected to the right and left 5a, 5b of the torso belt 3 that is wrapped around the operator's own waist, which is a normal forestry safety belt. After winding the ring-shaped string 7 around the position 11 near the tree of the rope 4a and holding it through the hook part 8, the string 7 is rotated at least twice around the position 12 near the tree of the left rope 4b and then the hook 8 Is hooked at a position 13 closer to the tree than 11 of the right rope 4a.
It is desirable to select the length of the string 7 according to the thickness of the tree, and this series of operations is preferably completed under the tree before climbing the tree.
Of course, the left and right sides may be reversed depending on the preference of the operator and the dominant arm.

When lifting the tree, the auxiliary tools (7, 8) are pulled in front of the operator. When you stop and work on the tree or go around the tree on the spot, keep the auxiliary tools (7, 8) close to the tree.
By doing so, the worker can move up and down smoothly, work safely on the tree, or go around the tree.
Also, the trees become thinner as they get taller, so with safety on the tree, remove the hook 8 hung on the right rope 4a, pass it outside the rope 4a, and then hook it on the left rope 4b. By multiplying by 8, the amount of sag of the auxiliary tool can be adjusted.

  In FIG. 2, both the method of holding the string 7 on the rope at the position 11 on the rope 4a and the method of tying the string 7 on the rope at the position 12 on the rope 4b are such that the string and the rope are in direct contact with each other. However, when tension is not applied to the string 7 by doing this, the string 7 can slide on the rope 4 and bring the auxiliary tools (7, 8) closer to the tree side or closer to the worker side. However, it is possible to provide an important function of automatically tightening the rope 4 and preventing it from slipping when the crab is detached and tension is applied to the string 7.

As shown in FIG. 3, the string 7 is a ring, and is passed through the hole of the metal hook 8 at the connecting portion 14 to be integrated. By adopting this structure, the positional relationship between the string 7 and the hook 8 can be changed, so that only one point can be prevented from being worn and the string can be easily replaced.
The string 7 has a diameter of about 5 mm, and is preferably composed of a synthetic resin such as polyester as a main component and is formed by cross stitching because it is excellent in moderate sliding, tightness and wear resistance.
The length L of the auxiliary tool is generally about 1 m, and a length of about 1.5 m is necessary for a thick tree.
The hook 8 may be provided with a stopper (so-called eggplants), but it is easier to handle without a stopper because it is frequently detached on the tree.

  As can be seen in FIG. 1, this climbing operation uses iron claws 6 called crabs that are put on the feet into the tree 1 and uses the tension of the rope 4 that hangs on the tree with the 5 a and 5 b of the trunk belt 3 as fulcrums. When climbing a tree, or when stopping on the tree, when the claw of the crab 6 comes off the tree, or when climbing the tree using the both hands to raise the rope 4 onto the tree, Although the tension of the rope 4 is loosened for a moment, if the time for the loosening is long, the risk of falling increases.

  When an operator is about to fall under such circumstances, the rope 4 hanging on the tree can be obtained by hanging the fall prevention aids (7, 8) on the rope 4 as shown in FIG. Since the auxiliary tool is a small ring hanging on the tree, it can prevent a fall.

  As a result, as shown in Fig. 4, the operator is suspended on the tree, but the rope 4 and the auxiliary tools (7, 8) are caught on the tree, so the rope 4 is bent at point A and attached to the waist of the rope 4. The portion connected to the belt 3 is almost vertical. As a result, the load of the body weight acts only in the substantially vertical direction, so that the body can be easily separated from the tree, and the crabs 6 can be hung on the tree and returned to the posture shown in FIG. Another reason is that the length of the rope 4 between the break point A, the rope, and the contact points 5a and 5b of the safety belt can be easily recovered.

If the crab is removed only in the conventional safety belt, that is, without the aid, even if the rope 4 is caught at the point B as shown in FIG. 5, the rope 4 is inclined and the operator is completely pressed against the tree. So it is difficult to return by yourself.
Moreover, since it falls for a certain distance until it will be in the state of FIG. 5, it may be injured by an impact force or it will fall in most cases as it is.

It is an external view at the time of attaching the auxiliary tool by this invention and climbing a tree. It is explanatory drawing which shows the mounting method of an auxiliary tool. It is an external view of the auxiliary tool by this invention. It is explanatory drawing when a crab removes during using the safety belt set of this invention. It is explanatory drawing when a crab comes off while using the conventional safety belt.

Explanation of symbols

1 Tree 2 Worker 3 Belt to be worn on the waist (safety belt)
4 Rope 4a Rope 4b on the right side when viewed from the worker Rope 5a on the left side when viewed from the worker Connection between the safety belt and the rope (right side)
5b Safety zone and rope connection (left side)
6 Tree climbing crabs (brackets with claws attached to the feet)
7 String 8 Hook attached to the string 11 Part where the auxiliary tool is attached to the rope 12 Part where the auxiliary tool is wrapped around the rope 13 Part where the hook of the auxiliary tool is hooked on the rope 14 Part where the string is passed through the hook A Rope breakage point B. Rope catching part when avoiding a crash when using a conventional safety belt L Length of assisting device

Claims (2)

  It is an auxiliary tool to be used in combination with a belt attached to the waist used when raising and lowering a tree and a rope that is arranged on the outer periphery of the tree and supported by two points on the belt. A tree elevating / lowering auxiliary tool comprising a ring-shaped string on which at least one hook-shaped metal fitting for connecting and bundling the ropes stretched between the left and right is attached. It is a safety belt set used when raising and lowering trees,
At least one hook-shaped bracket for connecting and bundling the right and left of the belt that is attached to the waist, the rope that is arranged on the outer periphery of the tree and supported at two points by the belt, and the rope that is stretched between the tree and the human body A safety belt set for raising and lowering trees, characterized by comprising a ring-shaped string fitted with a.

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