JP3234898U - Jig for fall prevention during container lashing work - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a jig for preventing a fall during container lashing work, which has a simple structure and is easy to use. SOLUTION: The jig 10 is a jig 10 for preventing a fall during container lashing work, which can be attached to and removed from a joint hole 13 of a corner metal fitting 12 provided in a container, and a long grip rod 15 and a base side thereof are attached to the tip thereof. A person who attaches and fixes a locking metal fitting 16 having a block-shaped locking portion 21 provided on the shaft portion 20 and its tip side, and a hook portion 34 of a safety belt attached to the shaft portion and attached to an operator. It has a hanger metal fitting 17 on which a stop hole 31 is formed, and the locking portion of the locking metal fitting is narrower than the vertical inner width of the joint hole and wider than the horizontal inner width of the joint hole. Therefore, it can be fitted into the joint hole in a state of being tilted with respect to the lateral width of the joint hole, and can be locked by abutting on both edges of the lateral inner width of the joint hole in a state of being fitted into the joint hole. [Selection diagram] Fig. 1

Description

The present invention relates to a fall prevention jig used to ensure the safety of workers (workers) during container lashing work.

Conventionally, when a container is transported by ship, the container is stacked on the deck of the ship or on the hatch cover. At this time, in order to prevent the container from moving due to shaking during the voyage, the container is lashed (tied) with a lashing hardware such as a long bar.
At the cargo handling site of such a container ship, for example, there is a lot of work near high places, and there is a risk that the worker will crash.
According to the Occupational Safety and Health Regulations (Safety Regulations), when there is a risk of danger to workers due to a crash, scaffolding must be secured using scaffolding boards, etc., and if that is difficult, , Wearing a safety belt when working. In using this safety belt, for example, the safety belt attachment described in Patent Document 1 can be used.

Japanese Unexamined Patent Publication No. 2000-310040

However, the work speed of container cargo handling is high, and the reality is that it is not possible to take time to take measures to prevent falls at specific locations. As an existing measure, there is a means of inserting the scaffolding board into the gap between the container floor and the ship and fixing it with a jack, but the scaffolding board is made of steel and is heavy, and it is difficult to handle it in a narrow work site.
Also, when working on the door side of the container, it is possible to hang a safety belt on the door, but there is no place to hang a safety belt on the side opposite to the door side, and existing magnet type and clamp type products Then, there is a possibility that the door may come off due to the impact at the time of a crash (impact load: for example, about 350 to 400 kg), so an alternative safety measure was required.

The present invention has been made in view of such circumstances, and an object of the present invention is to provide a jig for preventing a fall during container lashing work, which has a simple structure and is easy to use.

The jig for preventing a fall during container lashing work according to the above object according to the above object is attached to the vertically long joint holes of the corner fittings provided at the four corners of a rectangular parallelepiped or cubic container and is removable during container lashing work. It ’s a preventive jig,
With a long grip bar,
A shaft portion whose base side is attached to the tip portion of the grip rod, and a locking metal fitting having a block-shaped locking portion provided on the tip end side of the shaft portion.
It has a hanger metal fitting that is attached to the shaft portion of the locking metal fitting and has a locking hole for attaching and fixing the hook portion of the safety belt to be attached to the operator.
The locking portion of the locking metal fitting is narrower than the inner width of the joint hole in the vertical direction and wider than the inner width of the joint hole in the horizontal direction, and is tilted with respect to the horizontal width of the joint hole. In the state, it can be fitted into the joint hole, and in the state of being fitted into the joint hole, it can be locked by contacting both edges of the lateral inner width of the joint hole.

In the jig for preventing a fall during container lashing work according to the present invention, it is preferable that the hanger metal fitting is rotatably attached to the shaft portion of the locking metal fitting.

In the jig for preventing a fall during container lashing work according to the present invention, it is preferable that the gripping rod is expandable and contractible and its length can be adjusted.

In the jig for preventing a fall during container lashing work according to the present invention, the gripping rod is preferably made of an aluminum alloy.

Since the jig for preventing a fall during container lashing work according to the present invention has a long gripping rod, a locking metal fitting attached to the tip of the gripping rod can be used by, for example, an operator using the gripping rod. It can be easily attached to and removed from the joint hole of the corner fitting at a high place.
This locking metal fitting includes a shaft portion attached to the tip of the gripping rod and a block-shaped locking portion provided on the tip side of the shaft portion, and the locking portion is in the vertical direction of the joint hole. Since it is narrower than the inner width and wider than the inner width in the lateral direction of the joint hole, it can be fitted into the joint hole when it is tilted with respect to the horizontal width of the joint hole, and it is fitted into the joint hole. Then, it can be locked by abutting on both edges of the lateral inner width of the joint hole. Therefore, the structure of the locking metal fitting (locking portion) can be simplified, and the locking metal fitting (locking portion) can be securely attached and fixed to the joint hole of the corner metal fitting.
Then, a hanger metal fitting is attached to the shaft portion of the locking metal fitting, and the hook portion of the safety belt to be attached to the operator is attached and fixed to the locking hole formed in the hanger metal fitting. Therefore, for example, the safety belt is attached. Even if there is no place to hang it, safety measures can be taken in a short time with good workability.
Therefore, it is possible to provide an easy-to-use jig for preventing a fall during container lashing work with a simple configuration.

Further, when the gripping rod is expandable and adjustable in length, the jig for preventing a fall during container lashing work can be made compact, and when the gripping rod is made of an aluminum alloy, it falls during container lashing work. Since the weight of the prevention jig can be reduced, it is easy to carry and carry.

It is a partial side sectional view of the jig for preventing a fall at the time of container lashing work which concerns on one Embodiment of this invention. It is explanatory drawing of the use state of the fall prevention jig at the time of the container lashing work. (A) and (B) are a side view and a front view of a connecting member of a fall prevention jig during container lashing work, respectively. (A) and (B) are a front view and a partial plan sectional view of a locking metal fitting of a fall prevention jig during container lashing work, respectively, and (C) is a side sectional view of a ring member attached to the locking metal fitting. (A) to (C) are a partial side sectional view, a plan view, and a front view of the hanger metal fittings of the fall prevention jig during the container lashing operation, respectively. (A) and (B) are explanatory views showing a state in which the locking metal fitting of the fall prevention jig during container lashing work is not locked in the joint hole of the corner metal fitting, and a locked state, respectively. FIGS. (A) to (D) are explanatory views showing a process of fitting the locking metal fitting of the fall prevention jig during the container lashing operation into the joint hole of the corner metal fitting. FIGS. (A) to (D) are explanatory views showing a process of fitting the locking metal fitting of the fall prevention jig during the container lashing operation into the joint hole of the corner metal fitting.

Subsequently, the embodiment in which the present invention is embodied will be described with reference to the attached drawings, and the present invention will be understood.
As shown in FIGS. 1 to 8, the container lashing work fall prevention jig (hereinafter, also simply referred to as a fall prevention jig) 10 according to the embodiment of the present invention is provided at the four corners of the container 11. It can be attached to and removed from the joint hole 13 of the corner fitting 12, and is used to ensure the safety of the worker 14 during the lashing work of the container 11.
The details will be described below.

The container 11 is a general-purpose container conforming to the ISO standard, and for example, there is a dry container (covered container) such as a 20-foot type. The container 11 is a transportation container that can be loaded on a transportation vehicle such as a trailer, and can also be used for transportation of railways, ships, and the like.
The appearance of the container is rectangular (may be cubic), and corner fittings 12 are provided at the four corners (upper and lower parts of the container 11), and joint holes 13 are formed in the corner fittings 12. ing. The joint hole 13 has a vertically long shape in which the inner width in the vertical direction is wider than the inner width in the horizontal direction.

As shown in FIGS. 1 and 2, the fall prevention jig 10 includes a gripping rod 15, a locking metal fitting 16 attached to the tip thereof, and a hanger metal fitting 17 attached to the locking metal fitting 16. doing.
The gripping rod 15 is a long one gripped by the operator 14. Specifically, the gripping rod 15 has a telescopic structure, that is, a plurality of tubular members having different diameters are sequentially housed, and each tubular member is pulled out or housed to expand and contract. The expansion / contraction length can be adjusted in the range of, for example, about 0.4 to 3.5 m (preferably, the lower limit is 0.5 m, the upper limit is 2 m, and further 1.5 m). The gripping rod is made of aluminum alloy in order to reduce the weight in consideration of the ease of carrying by the operator, but other materials such as FRP (carbon fiber and glass fiber are used) are used. It can also be configured.

As shown in FIG. 1, a locking metal fitting 16 is attached and fixed to the tip of the gripping rod 15 via a connecting member 18.
As shown in FIGS. 1, 3 (A) and 3 (B), the connecting member 18 is made of an elongated plate material made of an aluminum alloy (Al-Mg-based or the like), and the base side (lower side) in the length direction thereof. Is attached and fixed to the tip of the gripping rod 15 and the tip side (upper side) in the length direction to the locking metal fitting 16 by bolts 19 (fastening members), respectively. Reference numerals 19a in FIGS. 3A and 3B are through holes for attaching bolts 19.
If the locking metal fitting can be attached and fixed to the tip of the gripping rod, it can be directly attached and fixed to the tip of the gripping rod without using a connecting member.

As shown in FIGS. 1, 4 (A) and 4 (B), the locking metal fitting 16 includes a shaft portion 20 to which the base side is attached to the tip of the gripping rod 15 via a connecting member 18, and the shaft portion 20. It is provided with a block-shaped (lump-shaped) locking portion 21 provided on the front side of the. The locking metal fitting 16 is made of an aluminum alloy (Al—Mg-based or the like) in order to reduce the weight, but it can also be made of another material having strength (for example, a steel material or the like).
The shaft portion 20 has a circular base side shaft portion that is attached and fixed to the connecting member 18 by a plurality of (here, two) bolts 19 in a state where the axial base end surface is in contact with the surface of the connecting member 18. It has a diameter-expanded shaft portion 22b which is connected to the tip of the base-side shaft portion 22a in the axial direction and has a larger diameter than the base-side shaft portion 22a and has a circular cross section. Reference numeral 20a in FIG. 4A is a female threaded portion for attaching and fixing the bolt 19.

Further, an elliptical positioning portion 23 that is wider than the diameter-expanded shaft portion 22b and has an elliptical shape when the base side shaft portion 22a is viewed from the axial direction (front view) is connected to the tip of the diameter-expanded shaft portion 22b in the axial direction. An elliptical locking portion 21 that is wider than the positioning portion 23 and has an elliptical shape when the base side shaft portion 22a is viewed from the axial direction is connected to the tip of the positioning portion 23 in the axial direction.
Therefore, the shaft portion 22 is continuously and integrally provided with the locking portion 21 via the positioning portion 23 on the front side (the locking metal fitting 16 is widened stepwise when viewed from the side). ..
When the gripping rod 15 is arranged in a vertical state as shown in FIG. 1, the major axes of the elliptical positioning portion 23 and the locking portion 21 are in the horizontal direction (the locking portion 21 is arranged). The locking metal fitting 16 is attached and fixed to the gripping rod 15 via the connecting member 18 so that the gripping rod 15 and the long axis of the positioning portion 23 and the locking portion 21 are orthogonal to each other when viewed from the front in the axial direction. ..

As shown in FIG. 6A, the width (maximum width) of the locking portion 21 in the major axis direction is narrower than the inner width of the joint hole 13 of the corner fitting 12 in the longitudinal direction (for example, 5 mm or less). (Narrow in range), and as shown in FIG. 6B, it is wider than the lateral inner width of the joint hole 13 (for example, wider in a range of 3 mm or more (preferably 10 mm or less)). There is. Further, as shown in FIG. 6B, the width of the positioning portion 23 in the major axis direction is narrower than the inner width of the joint hole 13 in the lateral direction (for example, within a range of 10 mm or more (preferably 20 mm or less)). The width is narrow).
The widths of the locking portion 21 and the positioning portion 23 in the minor axis direction are both narrower than the inner widths of the joint holes 13 in the vertical direction and the horizontal direction.

Here, the relationship between the widths of the locking portion 21 and the positioning portion 23 in the major axis direction is such that the positioning portion 23 whose major axis direction is the horizontal direction is located in the joint hole 13 and is in the lateral direction (horizontal width of the joint hole 13). Even if it moves in the direction), as shown in FIG. 6B, both side portions 21a of the locking portion 21 in the long axis direction (horizontal direction) hit both edge portions 24 of the lateral inner width of the joint hole 13. It is set to be in contact (so that the locking portion 21 does not come off from the joint hole 13).
As a result, as shown in FIGS. 7 (A) to 7 (D) and FIGS. 8 (A) to 8 (C), the axial center of the locking metal fitting 16 (locking portion 21) is set to the width of the joint hole 13 of the corner metal fitting 12. In the tilted state, the locking portion 21 can be fitted into the joint hole 13. Further, as shown in FIGS. 6B and 8D, when the locking portion 21 is fitted into the joint hole 13, both side portions 21a of the locking portion 21 in the long axis direction are formed in the joint hole 13. It can be locked by abutting on both edge portions 24 having an inner width in the lateral direction.

As shown in FIGS. 1 and 2, a hanger metal fitting 17 is attached to the shaft portion 20 of the locking metal fitting 16.
The hanger metal fitting 17 is made of an aluminum alloy (Al-Mg-based, etc.), and as shown in FIGS. The lower side has a reduced width, and the upper side has a through hole portion 25 through which the shaft portion 20 of the locking metal fitting 16 is inserted.
The through hole portion 25 has a guide hole 26 formed in the central portion in the axial direction thereof so as to have a slight gap from the outer peripheral surface of the shaft portion 20 (base side shaft portion 22a) of the locking metal fitting 16. On both sides of the guide hole 26 in the axial direction, the guide hole 26 is provided with a diameter-expanded hole 27 which is formed so as to align with the guide hole 26 and has a diameter larger than that of the guide hole 26.

The shaft portion 20 of the locking metal fitting 16 is inserted into the through hole portion 25 (guide hole 26), and the base portion of the base side shaft portion 22a protruding from the guide hole 26 has a cylindrical shape as shown in FIG. 4 (C). The ring member 28 fits in. As shown in FIG. 1, the outer diameters of the enlarged shaft portion 22b of the locking metal fitting 16 and the ring member 28 are smaller than the inner diameter of the enlarged diameter hole 27 and larger than the inner diameter of the guide hole 26. The side surfaces of the diameter-expanded shaft portion 22b and the ring member 28 are in contact with the side surfaces forming a step between the guide hole 26 and the diameter-expanded hole 27, and the hanger metal fitting 17 is aligned with the shaft portion 20 of the locking metal fitting 16. It is possible to prevent the movement in the axial direction.
As a result, the hanger metal fitting 17 is rotatably attached to the shaft portion 20 of the locking metal fitting 16.

Further, as shown in FIGS. 1 and 5 (A) to 5 (C), the through hole portion 25 (guide hole 26) is continuously located at the center position in the axial direction over the inner peripheral surface of the guide hole 26. A ring-shaped groove 29 having an enlarged diameter from the guide hole 26 is formed, and a grease nipple 30 is attached and fixed at an upper position of the ring-shaped groove 29 (hanger metal fitting 17).
As a result, the lubricating oil can be supplied into the ring-shaped groove 29 from the outside via the grease nipple 30. Further, since the ring-shaped groove 29 is formed over the inner peripheral surface of the guide hole 26, the inner peripheral surface of the guide hole 26 and the outer peripheral surface of the shaft portion 20 (base side shaft portion 22a) of the locking metal fitting 16 Lubricating oil is supplied to the entire gap between the two, so that the hanger metal fitting 17 can smoothly rotate with respect to the shaft portion 20 of the locking metal fitting 16.

A locking hole 31 is formed on the lower side (reduced width portion) of the hanger metal fitting 17.
The locking hole 31 has a rectangular shape when viewed from the side, and penetrates in the thickness direction on the lower side of the hanger metal fitting 17. That is, when the hanger metal fitting 17 is viewed in a plan view, the locking hole 31 is formed in a direction orthogonal to the through hole portion 25.
As shown in FIGS. 1 and 2, the locking hole 31 attaches and fixes a hook portion 34 attached to the tip end portion of the rope portion 33 of the safety belt 32 attached to the operator 14.
As a result, during the container lashing operation, for example, safety measures can be easily taken even if there is no place to attach and fix the hook portion 34 of the safety belt 32.

Further, as described above, in the above-mentioned jig 10 for preventing a fall during container lashing work, each component is made of an aluminum alloy and the weight is reduced (for example, about 1000 g or less, preferably 800 g or less). (Because it is about 600 g or less, more preferably about 600 g or less), it is easy to carry and convenient to carry (the burden on the worker 14 when transporting the fall prevention jig 10 can be reduced).
Since a through hole 35 is formed at the base end of the gripping rod 15 of the fall prevention jig 10, when the fall prevention jig 10 is not used, the gripping rod 15 is shortened. A hook or the like can be hooked on the through hole 35 and attached to, for example, the waist belt of an operator.

Subsequently, a method of using the fall prevention jig 10 during container lashing work will be described with reference to FIGS. 1 and 2.
The worker 14 attaches and fixes the hook portion 34 of the safety belt 32 worn by the worker 14 to the locking hole 31 formed in the hanger metal fitting 17 of the fall prevention jig 10.
Next, the gripping rod 15 of the fall prevention jig 10 is extended, and the locking portion 21 of the locking metal fitting 16 is placed in the joint hole 13 of the corner metal fitting 12 provided at the upper part of the container 11 from FIGS. 7 (A) to 7 (A). (D), mounting according to the procedure shown in FIGS. 8 (A) to 8 (D).

Specifically, as shown in FIGS. 7 (A) to 7 (D) and FIGS. 8 (A) to 8 (C), the axial center of the locking metal fitting 16 (locking portion 21) is the joint hole 13 of the corner metal fitting 12. The locking portion 21 and the positioning portion 23 of the locking metal fitting 16 are fitted into the joint hole 13 in a state of being tilted with respect to the lateral width of the above.
Then, as shown by the solid line in FIG. 8D, after the locking portion 21 and the positioning portion 23 of the locking metal fitting 16 are fitted into the joint hole 13, the locking metal fitting 16 is inserted in the lateral direction of the joint hole 13. By moving, the positioning portion 23 is positioned in the joint hole 13 as shown by the alternate long and short dash line in FIG. 8 (D).

As a result, as shown by the broken line in FIG. 6B and the alternate long and short dash line in FIG. Since it comes into contact with the portion 24, even if the positioning portion 23 moves laterally in the joint hole 13, the locking portion 21 can be locked in the joint hole 13.
In the free state, the gripping rod 15 is arranged in a vertical state as shown in FIGS. 1 and 2 due to its own weight. In this case, the major axes of the elliptical positioning portion 23 and the locking portion 21 are formed. Since the direction is horizontal, the locking portion 21 is maintained in a state of being locked in the joint hole 13.

As a result, the worker 14 can safely carry out the container lashing work as shown in FIG.
After the container lashing work is completed, the operator 14 grips the gripping rod 15 and removes the locking portion 21 of the locking metal fitting 16 from the joint hole 13 of the corner metal fitting 12 in the reverse procedure of the above procedure. Then, the grip rod 15 is shortened, and the hook portion 34 of the safety belt 32 is removed from the locking hole 31 of the hanger metal fitting 17.
The fall prevention jig 10 in which the gripping rod 15 is shortened can be attached to the waist belt of the worker 14 by hooking a hook or the like in the through hole 35, for example.

Although the present invention has been described above with reference to one embodiment, the present invention is not limited to the configuration described in the above-described embodiment, and is described in the scope of claims for utility model registration. It also includes other embodiments and modifications that can be considered within the scope of the above. For example, the case where a jig for preventing a fall during container lashing work of the present invention is configured by combining a part or all of the above-described embodiments and modifications is also included in the scope of rights of the present invention.
In the above-described embodiment, the case where the gripping rod has a telescopic structure and is configured to be expandable and contractible has been described, but it can also be configured to be bendable at one or a plurality of joints, and the tip of the gripping rod can be bent. If the locking metal fittings attached to can be reached to the corner metal fittings provided at the top of the container (the locking part can be fitted into the joint hole), the gripping rod should be composed of one rod that does not expand and contract. You can also.

Further, in the above-described embodiment, the case where the hanger metal fitting is rotatably attached to the shaft portion of the locking metal fitting has been described, but it can also be attached and fixed so as not to be rotatable (so that it cannot be rotated). ..
Then, in the above-described embodiment, the case where the shape of the locking portion of the locking metal fitting is an elliptical shape when the shaft portion is viewed from the axial direction (front view) has been described, but the vertical direction of the joint hole has been described. The width is narrower than the inner width of the joint hole, wider than the inner width in the lateral direction of the joint hole, and is not particularly limited as long as it can be fitted and locked in the joint hole. It may be oval, circular, or polygonal. At this time, the shape of the positioning portion of the locking metal fitting is not particularly limited as long as the positioning portion is arranged in the joint hole and the locking portion can move laterally within a range in which the locking portion can be locked with respect to the joint hole. No.

10: Fall prevention jig during container lashing work, 11: Container, 12: Corner bracket, 13: Joint hole, 14: Worker, 15: Grip rod, 16: Locking bracket, 17: Hanger bracket, 18: Connection Member, 19: Bolt, 19a: Through hole, 20: Shaft part, 20a: Female thread part, 21: Locking part, 21a: Side part, 22a: Base side shaft part, 22b: Expanded shaft part, 23: Positioning part , 24: Edge, 25: Through hole, 26: Guide hole, 27: Expanded hole, 28: Ring member, 29: Ring groove, 30: Grease nipple, 31: Locking hole, 32: Safety belt, 33: Rope part, 34: Hook part, 35: Through hole

Claims (4)

A jig that can be attached to and removed from the vertically long joint holes of the corner fittings provided at the four corners of a rectangular parallelepiped or cubic container to prevent a fall during container lashing work.
With a long grip bar,
A shaft portion whose base side is attached to the tip portion of the grip rod, and a locking metal fitting having a block-shaped locking portion provided on the tip end side of the shaft portion.
It has a hanger metal fitting that is attached to the shaft portion of the locking metal fitting and has a locking hole for attaching and fixing the hook portion of the safety belt to be attached to the operator.
The locking portion of the locking metal fitting is narrower than the inner width of the joint hole in the vertical direction and wider than the inner width of the joint hole in the horizontal direction, and is tilted with respect to the horizontal width of the joint hole. At the time of container lashing work, which is characterized in that it can be fitted into the joint hole in the state, and can be locked by abutting on both edges of the lateral inner width of the joint hole in the state of being fitted into the joint hole. Fall prevention jig. In the jig for preventing a fall during a container lashing work according to claim 1, the hanger metal fitting is rotatably attached to a shaft portion of the locking metal fitting for preventing a fall during a container lashing work. Ingredients. The jig for preventing a fall during a container lashing operation according to claim 1 or 2, wherein the gripping rod is expandable and contractible and its length can be adjusted. The jig for preventing a fall during a container lashing operation according to any one of claims 1 to 3, wherein the gripping rod is made of an aluminum alloy.

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