JP7765068B2 - Loading hook - Google Patents

Description

The present invention relates to a load-lowering hook used for transporting loads by load-carrying devices such as drones and helicopters.

A variety of hooks for lowering cargo of this type have been proposed in the past.

For example, Patent Document 1 discloses a load-lowering hook that prevents a load from coming off the hook, even when used to transport and lower a load to various locations.

Patent Document 2 also discloses a load-lowering hook that can automatically release suspended cargo.

JP 2019-18929 A Japanese Patent Application Laid-Open No. 2020-183326

However, both of these have the problem of being complex in structure and difficult to handle.

The present invention was developed based on the above circumstances, and its purpose is to provide a load-lowering hook that is simple in structure and easy to handle.

In order to solve the above problems, the present invention provides a load-lowering hook, which is used for transporting loads by a load-carrying device, and which comprises a hook body having a bent portion bent in a dogleg shape, a first frame provided on one side of the bent portion, and a second frame provided on the other side of the bent portion; a hook portion whose tip is folded back toward the inner angle of the bent portion to form a hook-shaped portion for suspending loads; an attachment portion provided on the bent portion for attachment to the load-carrying device; and a tip-down prevention portion connected to the tip of the second frame to prevent the hook-shaped portion from tipping over, the attachment portion being configured to engage with the attachment portion movably from a position close to the hook-shaped portion relative to the center of gravity to a position farther from the position, and the tip-down prevention portion being formed in a triangular shape by a pair of side members one end of which is connected to the tip of the second frame, and a base member connected to the other end of these side members .

The mounting portion preferably has a mounting hole through which the mounted portion is inserted, and is configured so that the center of gravity is located within the mounting hole.

The present invention provides a load-lowering hook that is simple in structure and easy to handle.

The drawings illustrate specific embodiments of the invention according to the present disclosure, including essential features of the invention as well as alternative and preferred embodiments.
1 is a perspective view showing a load-lowering hook according to a first embodiment of the present invention; FIG. 4 is a perspective view for explaining the operation of the lowering hook. FIG. 4 is a perspective view for explaining the operation of the lowering hook. FIG. 4 is a perspective view for explaining the operation of the lowering hook. FIG. 4 is a perspective view for explaining the operation of the lowering hook. FIG. 4 is a perspective view for explaining the operation of the lowering hook. FIG. 10 is a perspective view showing a modified example of the anti-falling portion of the lowering hook. FIG. 10 is a perspective view for explaining the function of the fall prevention portion . FIG. 10 is a perspective view showing a load lowering hook according to a second embodiment of the present invention. FIG. 4 is a perspective view for explaining the operation of the lowering hook. FIG. 4 is a perspective view for explaining the operation of the lowering hook. FIG. 10 is a perspective view showing a load-lowering hook according to a third embodiment of the present invention. FIG. 4 is a perspective view for explaining the operation of the lowering hook. FIG. 4 is a perspective view for explaining the operation of the lowering hook. FIG. 4 is a perspective view for explaining the operation of the lowering hook. FIG. 4 is a perspective view for explaining the operation of the lowering hook. FIG. 4 is a perspective view for explaining the operation of the lowering hook. FIG. 10 is a perspective view showing a modified example of the attachment portion of the load-lowering hook. FIG. 10 is a perspective view showing another modified example of the attachment portion of the load-lowering hook. FIG. 10 is a perspective view showing a load-lowering hook according to a fourth embodiment of the present invention. FIG. 4 is a perspective view for explaining the operation of the lowering hook. FIG. 4 is a perspective view for explaining the operation of the lowering hook. FIG. 4 is a perspective view for explaining the operation of the lowering hook. FIG. 10 is a perspective view showing a load-lowering hook according to a fifth embodiment of the present invention. FIG. 10 is a perspective view showing a load-lowering hook according to a sixth embodiment of the present invention. FIG. FIG. 10 is a perspective view showing a modified example of the load-lowering hook. FIG. 10 is a perspective view showing a modified example of the load-lowering hook. FIG. 10 is a perspective view showing a modified example of the load-lowering hook. FIG. 13 is a perspective view showing a load-lowering hook according to a seventh embodiment of the present invention. FIG. 10 is a front view showing a modified example of the load-lowering hook. FIG. 10 is a perspective view showing a modified example of the load-lowering hook.

First Embodiment
A first embodiment of the present invention will be described below with reference to the drawings.

In Figure 1, reference numeral 1 indicates a load-lowering hook according to the present invention.

This load-lowering hook 1 is used to transport loads W using load-carrying devices 2 such as drones and helicopters, and has a hook body 3.

This hook body 3 is bent in a V-shape, with the bent portion 4 separating it into a first frame portion 5 on one side and a second frame portion 6 on the other.

The tip of the first frame portion 5 is folded back toward the inner angle of the bent portion 4 to form a hook-shaped portion 7 for hanging luggage W.

In addition, a fall prevention part 8 that prevents the hook-shaped part 7 from falling is connected to the tip of the second frame part 6.

This fall prevention section 8 is formed in a triangular shape by a pair of side members 9, 9, one end of which is connected to the tip of the second frame 6, and a base member 10, which is connected to the other end of these side members 9, 9.

Furthermore, the bent portion 4 of the hook body 3 is provided with an attachment portion 11 for attaching a cord-like member (attachment portion) S that is part of the load carrying device 2 and hangs down from the load carrying device 2.

This mounting portion 11 has a curved member 12 whose ends are connected to the middle of the first frame portion 5 and the middle of the second frame portion 6. This curved member 12, the first frame portion 5, and the second frame portion 6 form a mounting hole 13 through which the cord-like body S can be inserted.

The cord-like body S can move from the first portion 14, which is close to the hook portion 7 of the mounting hole 13, to the second portion 15, which is farther away.

Furthermore, the center of gravity G of the load-lowering hook 1 is configured to be located between the first portion 14 and the second portion 15.

In other words, the mounting portion 11 is configured to be able to engage the cord-like body S movably and swingably around the fulcrum from a first portion 14 that is close to the hook portion 7 relative to the center of gravity G of the load-lowering hook 1 to a second portion 15 that is far from the hook portion 7.

When transporting cargo W, the lower end of the rope S hanging from the cargo transport device 2 is inserted into the mounting hole 13 of the cargo-lowering hook 1 and is movably attached to the hook body 3 within the mounting hole 13.

Next, as shown in Figure 1, the string P attached to the cargo W is hooked onto the hook portion 7 of the lowering hook 1, and when the cargo W is lifted, the weight of the cargo W causes the hook portion 7 of the lowering hook 1 to be lowered.

At this time, the cord-like body S is positioned in the second portion 15 of the mounting hole 13 of the mounting portion 11, i.e., it is engaged with the load-lowering hook 1 above the center of gravity G.

Furthermore, since the hook body 3 is bent in a V-shape, the second frame portion 6 and the fall prevention portion 8 do not interfere with the cord-like body S.

Next, as shown in Figure 2, when the cargo W lands, the string P loosens, but the hook portion 7 of the cargo-lowering hook 1 is on the lower side because the center of gravity G is below the attachment position of the string S, i.e., the second portion 15 of the attachment hole 13.

Next, as shown in Figure 3, when the lower end of the hook portion 7 of the lowering hook 1 comes into contact with the cargo W, the lowering hook 1 begins to rotate around the cord-like member S as a fulcrum, as shown in Figure 4.

Next, as shown in Figure 5, when the fall prevention section 8 hits the cargo W, the first section 14 is above the second section 15 of the mounting hole 13, and when the rope-like body S is pulled up, the rope-like body S moves from the second section 15 to the first section 14 within the mounting hole 13.

At this time, the fall prevention portion 8 comes into contact with the luggage W, thereby preventing the hook portion 7 from falling .

Next, as shown in Figure 6, if the cord-like body S is pulled up further, the center of gravity G will be lower than the first part 14, so the hook-like portion 7 will be on the upper side, and the cord-like body P will come off the hook-like portion 7.

At this time, because the hook body 3 is bent in a V-shape, the first frame portion 5 does not interfere with the cord-like body S.

With the above configuration, the load-lowering hook 1 has no moving parts, making it simple in structure and easy to handle.

Although the fall prevention portion 8 is attached to the second frame portion 6, it may be provided in the vicinity of the hook portion 7 as shown in FIG.

That is, a pair of protruding members 16, 16 are connected to the first frame portion 5 of the hook body 3, and these protruding members 16, 16 can prevent the hook-shaped portion 7 from falling over by hitting the luggage W, as shown in Figure 8.

Second Embodiment
A second embodiment of the present invention will be described below with reference to the drawings.

As shown in FIG. 9, in the second embodiment, the fall prevention portion 8 of the first embodiment is not provided.

In addition, the mounting portion 11 is configured to be on the hook portion 7 side of the center of gravity G of the load-lowering hook 1.

In other words, in this second embodiment, the mounting portion 11 is provided at the bent portion 4, and the center of gravity G is positioned on the second frame portion 6 side, so that the cord-like member S inserted through the mounting hole 13 always engages with the lowering hook 1 on the hook portion 7 side of the center of gravity G of the lowering hook 1.

In this case, the mounting hole 13 of the mounting portion 11 is formed to a size that allows the load-lowering hook 1 to rotate relative to the rope S inserted through the mounting hole 13, i.e., a size that allows the rope S to be loosely inserted through the mounting hole 13.

As shown in Figure 9, when the string P attached to the cargo W is hooked onto the hook portion 7 of the lowering hook 1 and the cargo W is lifted, the weight of the cargo W causes the hook portion 7 of the lowering hook 1 to be lowered.

Next, as shown in Figure 10, when the cargo W lands, the string P loosens, and the center of gravity G of the lowering hook 1 is positioned above the mounting part 11, so the hook 1 begins to rotate around the string S as a fulcrum so that the center of gravity G is below the mounting part 11.

This allows the rope S to detach from the hook portion 7 without the load-lowering hook 1 coming into contact with the load W.

Next, as shown in Figure 11, when the cord-like body S is pulled up, the center of gravity G is below the attachment part 11 and the hook-like part 7 is on the upper side.

Even with the above configuration, the load-lowering hook 1 has no moving parts, making it simple in structure and easy to handle.

Third Embodiment
A third embodiment of the present invention will be described below with reference to the drawings.

In this third embodiment, as shown in Figure 12, a pair of hook portions 7 and a pair of mounting portions 11 are provided.

The hook-shaped portions 7, 7 and the mounting portions 11, 11 are formed by bending a single wire 17 and arranging them in parallel at a predetermined distance.

That is, the filament 17 has a connecting portion 18 of a predetermined width in the center, and both ends of this connecting portion 18 are bent in the same direction to form a pair of parallel portions 19, 19.

These parallel sections 19, 19 are bent midway, with the first parallel sections 20, 20 on the connecting section 18 side of these bent sections 4, 4, and the second parallel sections 21, 21 on the opposite side of the connecting section 18.

The parallel portions 19, 19 are also bent into a ring shape at the bent portions 4, 4, forming mounting holes 13, 13 for the mounting portions 11, 11. The cord-like members S, S hanging down from the luggage carrying device 2 are inserted into these mounting holes 13, 13, respectively, and are attached to the mounting portions 11, 11.

The filament 17 of the mounting portions 11, 11 is bent symmetrically with respect to the plane so that the second parallel portions 21, 21 are on the outside relative to the first parallel portions 20, 20, making the spacing between the second parallel portions 21, 21 wider than the spacing between the first parallel portions 20, 20.

The tips of the second parallel portions 21, 21 are folded back in the same direction to form hook-shaped portions 7, 7.

Furthermore, each cord-like body S can be moved from a first portion 14 close to the hook-like portion 7 of the mounting hole 13 to a second portion 15 farther away.

The center of gravity G of the load-lowering hook 1 is configured to be located between the first portion 14 and the second portion 15 and between the mounting holes 13, 13.

In other words, each mounting portion 11 is configured to be able to engage the cord-like body S movably and swingably around the fulcrum from the first portion 14, which is closest to the hook portion 7, to the second portion 15, which is farther from the hook portion 7, relative to the center of gravity G of the load-lowering hook 1.

When transporting cargo W, the lower ends of the ropes S, S hanging from the cargo transport device 2 are inserted into the mounting holes 13, 13 of the cargo-lowering hook 1, and are movably fastened to the hook bodies 3, 3 within the mounting holes 13.

Next, as shown in Figure 12, the string P attached to the cargo W is hooked onto the hook portions 7, 7 of the lowering hook 1, and when the cargo W is lifted, the hook portions 7, 7 of the lowering hook 1 are positioned downward due to the weight of the cargo W.

At this time, each cord-like body S is positioned in the second portion 15 of the mounting hole 13 of the mounting portion 11, i.e., it is engaged with the load-lowering hook 1 above the center of gravity G.

Next, as shown in Figure 13, when the cargo W lands, the string P loosens, but the hook portions 7, 7 of the cargo-lowering hook 1 are on the lower side because the center of gravity G is below the attachment position of the string S, i.e., the second portion 15 of the attachment hole 13.

Next, as shown in Figure 14, when the lower ends of the hook-shaped portions 7, 7 of the lowering hook 1 come into contact with the cargo W, the lowering hook 1 begins to rotate around the cord-shaped members S, S as a fulcrum, as shown in Figure 15.

Next, as shown in Figure 16, when the connecting portion 18 comes into contact with the luggage W, the first portions 14, 14 are positioned above the second portions 15, 15 of the mounting holes 13, 13, and when the cord-like bodies S, S are pulled up, the cord-like bodies S, S move from the second portions 15 to the first portions 14 within the mounting holes 13, 13.

At this time, the connecting portion 18 and the hook portions 7, 7 come into contact with the luggage W, preventing the hook portions 7, 7 from falling over .

Next, as shown in Figure 17, if the cord-like bodies S, S are further pulled up, the center of gravity G will be lower than the first portion 14, so the hook-like portions 7, 7 will be on the upper side, and the cord-like body P will be released from the hook-like portions 7, 7.

With the above configuration, the cargo hook 1 has no moving parts, making it simple in structure and easy to handle, and also making it easy to manufacture.

In addition, the mounting parts 11, 11 are spaced a predetermined distance apart and suspended by two cords S, S, which helps reduce swaying of the luggage W, for example, due to rotation.

Furthermore, the connecting portion 18 and the pair of spaced-apart hook portions 3, 3 prevent the load-lowering hook 1 from tipping over.

In the third embodiment, the mounting portion 11 is formed in a ring shape, but it may also be formed in a triangular shape as shown in Figure 18 or an oval shape as shown in Figure 19.

Fourth Embodiment
A fourth embodiment of the present invention will be described below with reference to the drawings.

In the third embodiment, the center of gravity G of the load-lowering hook 1 was configured to be located between the first portion 14 and the second portion 15 and between the mounting holes 13, 13. However, in this fourth embodiment, the mounting holes 13, 13 are made smaller, and the center of gravity G is configured to be located between the first parallel portions 20, 20, closer to the connecting portions 18, 18 than between the mounting holes 13, 13.

As shown in Figure 20, when the ropes S, S attached to the cargo W are hooked onto the hook portions 7, 7 of the lowering hook 1 and the cargo W is lifted, the weight of the cargo W causes the hook portions 7, 7 of the lowering hook 1 to be lowered.

Next, as shown in Figure 21, when the cargo W lands, the ropes S, S loosen, and the center of gravity G of the lowering hook 1 is located above the mounting parts 11, 11, so the ropes S, S begin to rotate around the fulcrum so that the center of gravity G is below the mounting parts 11, 11.

As a result, as shown in Figure 22, the ropes S, S are released from the hook portions 7, 7 without the load-lowering hook 1 coming into contact with the load W.

Next, as shown in Figure 23, when the cord-like bodies S, S are pulled up, the center of gravity G is below the attachment portions 11, 11, and the hook-like portions 7, 7 are on the upper side.

Even with the above configuration, the load-lowering hook 1 has no moving parts, making it simple in structure and easy to handle.

Fifth Embodiment
A fifth embodiment of the present invention will be described below with reference to the drawings.

In the third and fourth embodiments, the cargo-lowering hook 1 is formed by bending a single wire 17, but the cargo-lowering hook 1 in the first and second embodiments may also be formed by bending a single wire 17.

Figure 24 shows an example of the first embodiment of the load-lowering hook 1 formed by bending a single wire member 17.

Sixth Embodiment
A sixth embodiment of the present invention will be described below with reference to the drawings.

In the third embodiment, the load-lowering hook 1 was attached to a rope-like body S as the attachment portion, but in this embodiment, as shown in Figures 25 and 26, the load-lowering hook 1 is attached to a binding member (attachment portion) T attached to the leg 22 of the load-carrying device 2.

In other words, by inserting the binding member T into the mounting hole 13 of the mounting portion 11 and binding it to the leg portion 22 of the load-carrying device 2, the mounting portion 11 is configured to be able to movably engage with the cord-like body S from the first portion 14 closest to the hook portion 7 relative to the center of gravity G of the load-lowering hook 1 to the second portion 15 farthest from the hook portion 7 and swingably use it as a fulcrum.

In addition, considering the limited space around the legs 22 of the load carrying device 2, the first parallel portion 20 is made short and a weight 24 is attached to the connecting portion 18.

As shown in Figure 27, two lowering hooks 1 may be attached to legs 22, 22 facing each other, or as shown in Figure 28, two lowering hooks 1 may be attached to legs 22, 22 facing the same direction.

Furthermore, instead of the first parallel portions 22, 22, inclined portions 25, 25 may be provided that are inclined inward, as shown in Figure 29.

Seventh Embodiment
A seventh embodiment of the present invention will be described below with reference to the drawings.

In the third embodiment, a cord-like body S was used as the attachment target, and in the sixth embodiment, a binding member T was used as the attachment target. However, in this embodiment, as shown in Figure 30, the load-lowering hook 1 is attached by inserting the leg 22 of the load-carrying device 2 into the attachment hole 13 of the attachment part 11, and the attachment part 11 is configured so that it can move from a first part 14 close to the hook part 7 relative to the center of gravity G of the load-lowering hook 1 to a second part 15 far from the hook part 7 and can swing around the leg 22 as a fulcrum.

Note that Figures 31 and 32 show an example in which the sixth embodiment of the load-lowering hook 1 is applied to this embodiment.

In Figure 31, two load-hanging hooks 1 are attached to legs 22, 22 with the hook-shaped portions 7 facing in the same direction, while in Figure 32, two load-hanging hooks 1 are attached to legs 22, 22 with the hook-shaped portions 7 facing in opposite directions.

1 Load-lowering hook 2 Load-carrying device 7 Hook-shaped portion 8 Fall-prevention portion
11 Mounting portion 13 Mounting hole 17 Linear body 22 Mounted portion (leg portion)
W: Luggage S: Attached part (cord)
G Center of gravity T Mounting part (binding member)

Claims (2)

Used for transporting loads by a load-carrying device,
a hook body having a bent portion bent in a dogleg shape, a first frame provided on one side of the bent portion, and a second frame provided on the other side of the bent portion;
a hook-shaped portion formed by folding back a tip of the first frame toward an inner angle of the bent portion and used to hang the load;
an attachment portion provided on the bending portion for attachment to an attachment portion of the load carrying device;
a fall prevention portion connected to a tip of the second frame and preventing the hook-shaped portion from falling;
Equipped with
The mounting portion is configured to be movably engaged with the mounting portion from a portion close to the hook-shaped portion with respect to the center of gravity to a portion far from the hook-shaped portion,
The fall prevention portion is formed in a triangular shape by a pair of side members each having one end connected to the tip of the second frame and a base member connected to the other end of the side members.
A load lowering hook characterized by: The load-lowering hook described in claim 1, characterized in that the mounting portion has a mounting hole through which the mounted portion is inserted and configured so that the center of gravity is located within the mounting hole.