Load lifting device

Abstract

To provide a load suspending device capable of suspending a load only by operation of an operation device by an operator without affected by the kind of a material included in the load.SOLUTION: A load suspending device 1 includes attracted members 22, 23 provided on a handle 21 of a load X, an attraction device 5 attracting the attracted members 22, 23 to form a hooking hole 120 between the handle 21 and an upper part 2A of the load X, a suspending tool 4 having a hook 41 inserted in the hooking hole 120 to hook the handle 21, and a hydraulic shovel 3 serving as a suspending device for suspending the load X hung on the suspending tool 4. The hook 41 is moved between a close position in which a tip part faces upward by rotation in the vertical direction around a first support pin 43 and an open position in which the tip part faces downward. The attraction device 5 has a suction port 52A attracting the attracted members 22, 23 by suction force, which is arranged to face the hook 41 at the close position and opened downward.SELECTED DRAWING: Figure 9

Description

[Technical Field]

[0001] The present invention relates to a load lifting device for lifting a load. [Background technology]

[0002] Generally, loads such as powdered materials such as soil, cement, and grains, as well as radioactive waste removed during decontamination, are stored and transported in bag-shaped containers such as flexible container bags and sandbags. When transporting these loads, the containers are hoisted by hooking them onto a hoisting device attached to a work machine such as a hydraulic excavator or crane. At this time, workers perform slinging work by slinging a pair of slings or ropes attached to the container onto the hoisting device.

[0003] However, slinging work carries the risk that workers may come into contact with the sling or be crushed under the containment body when the work machine is operating, and there is also the risk that workers may be exposed to radiation if the containment body contains radioactive waste. Therefore, it is necessary to hook a pair of slings or ropes to the sling and lift the containment body only by operating the work machine, without the need for slinging work by the worker.

[0004] For example, Patent Document 1 discloses a bag lifting device in which a magnet is provided as an attraction means in the bucket of a backhoe and iron is provided as an attracted means in the handle of a bag containing a load, and by using the magnet to attract the iron, the handle can be hooked onto the tip of the bucket and the bag can be lifted even if the bag handle is in a lying position. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Patent No. 6210737 Summary of the Invention [Problem to be solved by the invention]

[0006] However, in the case of the bag lifting device described in Patent Document 1, a magnet is used as a means for lifting the handle of a bag that is lying down, so if the bag contains metal, the magnet may attract the metal. In that case, the magnet will attract the iron attached to the bag handle, making it difficult to achieve the original purpose of lifting the bag handle and hooking it onto the tip of the bucket.

[0007] Therefore, an object of the present invention is to provide a load lifting device that can lift a load simply by the operator operating the operating device, regardless of the type of material contained in the load. [Means for solving the problem]

[0008] In order to achieve the above object, the present invention provides a load lifting device comprising: an attracted member provided on a flexible linear handle attached to a load; a suction device that attracts the attracted member and pulls up the handle in a lying position, thereby forming a hooking hole between the handle and an upper part of the load; a lifting tool having a hook-shaped hook that is inserted into the hooking hole and hooks the handle; and a lifting device that lifts the load hung on the lifting tool, wherein the hook has a base end that is rotatably supported on a main body of the lifting tool by a support pin having a horizontal axis, and moves vertically relative to the main body around the support pin to move between a closed position where the tip faces upward and an open position where the tip faces downward, and the suction device is an expandable and contractible bellows-shaped tube The device further includes a tube having a suction port that is disposed opposite the hook in the closed position and opens downward, and the tube is configured to attract the member to be attracted by the suction port due to suction force. In the direction of bellows extension It is characterized by shrinkage. [Effects of the Invention]

[0009] According to the present invention, a load can be lifted simply by the operator operating the operating device, regardless of the type of material contained in the load. Problems, configurations, and effects other than those described above will become clear from the following description of the embodiments. [Brief explanation of the drawings]

[0010] [Figure 1] 1 is an external view showing an example of the configuration of a load hoisting device according to an embodiment of the present invention; [Figure 2] FIG. 2 is a schematic top view showing an example of the configuration of a traveling body. [Figure 3] FIG. 10 is a diagram showing another first example of the arrangement of air compressors. [Figure 4] FIG. 10 is a diagram showing a second alternative example of the arrangement of an air compressor. [Figure 5] FIG. 1 is a front view showing an example of a configuration of a sling to which an air gun is attached. [Figure 6] FIG. 1 is a side view showing an example of a configuration of a sling to which an air gun is attached. [Figure 7] FIG. 10 is a diagram showing a state in which the suction port is brought closer to the sphere by moving the hanging tool. [Figure 8] FIG. 10 is a diagram showing a state in which a sphere is being sucked into a suction port. [Figure 9] FIG. 10 is a diagram showing a state in which the hook is inserted into the hook hole. [Figure 10] FIG. 2 is a schematic diagram illustrating a configuration example of a suction device. [Figure 11] FIG. 10 shows a modified example of the load hoisting device, in which the hoisting tool is moved to bring the suction port closer to the string. [Figure 12] FIG. 10 shows a modified example of the load hoisting device, showing the state in which the string is sucked into the suction port. [Figure 13] FIG. 10 shows a modified example of the load lifting device, with the hook inserted into the hooking hole. DETAILED DESCRIPTION OF THE INVENTION

[0011] Hereinafter, a load hoisting device that hoists a load using a hydraulic excavator will be described as one aspect of a load hoisting device according to an embodiment of the present invention.

[0012] (Overall configuration of the load lifting device 1) First, the overall configuration of a load hoisting device 1 according to an embodiment of the present invention will be described with reference to FIGS.

[0013] Fig. 1 is an external view showing one configuration example of a load lifting device 1 according to an embodiment of the present invention. Fig. 2 is a schematic top view showing one configuration example of a traveling body 31. Fig. 3 is a diagram showing another first example relating to the arrangement of an air compressor 51. Fig. 4 is a diagram showing another second example relating to the arrangement of an air compressor 51.

[0014] As shown in FIG. 1, the load lifting device 1 uses a hydraulic excavator 3 to lift a load X such as earth and sand, grain, or radioactive waste contained in a bag 2 such as a flexible container bag or sandbag.

[0015] A pair of handles 21 are attached to the bag body 2, straddling the upper part 2A. Each of the pair of handles 21 is formed of a flexible linear member such as a rope or string, and when not pulled, falls over at the upper part 2A of the bag body 2. This prevents the bag from becoming bulky even when multiple loads X are stacked on top of it.

[0016] The hydraulic excavator 3 has a body composed of a self-propelled running body 31 and a rotating body 33 that is rotatably attached above the running body 31 via a rotating device 32, and a working device 34 is attached to the front of the rotating body 33.

[0017] 2, the traveling body 31 is a crawler type having a pair of crawlers 312L, 312R on the left and right sides of a chassis frame 311 serving as a base, and the pair of left and right crawlers 312L, 312R are rotated in contact with the ground by the driving force of a pair of traveling motors (not shown), thereby moving the rotating body 33. Note that, of the pair of left and right crawlers 312L, 312R, only the left crawler 312L is shown in FIG.

[0018] The chassis frame 311 is composed of a center frame 311C located in the center of the vehicle body and a pair of side frames 311L, 311R connected to the left and right sides of the center frame 311C, with the left crawler 312L attached to the left side frame 311L and the right crawler 312R attached to the right side frame 311R.

[0019] The pair of travel motors are mounted on the left and right side frames 311L, 311R corresponding to the left and right crawlers 312L, 312R, respectively, and are driven independently of each other to rotate the left and right crawlers 312L, 312R forward and backward independently of each other.

[0020] Furthermore, a center joint 313 serving as a rotary joint made up of an outer joint and an inner joint that are rotatable relative to one another is provided in the center of the center frame 311C of the chassis frame 311. The center joint 313 prevents the piping routed between the running body 31 and the rotating body 33 from twisting due to the rotation of the rotating body 33.

[0021] The revolving body 33 includes a revolving frame 331 serving as a base, a cab 332 in which the operator sits, a counterweight 333 that maintains balance with the work implement 34 so that the vehicle body does not tilt, and a machine room 334 that houses various devices necessary for driving the hydraulic excavator 3, such as the engine. On the revolving frame 331, the cab 332 is placed entirely on the left side, the counterweight 333 is placed at the rear end, and the machine room 334 is placed between the cab 332 and the counterweight 333.

[0022] The working device 34 comprises a boom 341 whose base end is rotatably attached to the swivel frame 331, a boom cylinder 342 that drives the boom 341, an arm 343 (arm member) that is rotatably attached to the tip of the boom 341, an arm cylinder 344 that drives the arm 343, and a lifting device 4 that is attached to the tip of the arm 343.

[0023] The boom cylinder 342 connects the revolving frame 331 and the boom 341, and rotates (elevates) the boom 341 in the vertical direction relative to the revolving body 33 as the rod extends and retracts. The arm cylinder 344 connects the boom 341 and the arm 343, and rotates the arm 343 in the front-rear direction relative to the boom 341 as the rod extends and retracts.

[0024] The hoisting tool 4 is a work tool for suspending and holding the load X, and has hook-shaped hooks 41 that are activated by the operator to hook onto the pair of handles 21 of the bag body 2. The load X is hung from the hoisting tool 4 (hanging state) when the pair of handles 21 of the bag body 2 are hooked onto the hooks 41.

[0025] The load X hung on the hoisting tool 4 is then lifted and moved by an operator operating the working device 34 (boom 341 and arm 343). In this manner, in this embodiment, the hydraulic excavator 3 is used as the lifting device that lifts the load X hung on the hoisting tool 4. Note that the lifting device does not necessarily have to be a work machine such as the hydraulic excavator 3 equipped with the working device 34, and may be any device having a mechanism that can lift the load X hung on the hoisting tool 4.

[0026] As described above, since the pair of handles 21 are in a lying down state at the upper part 2A of the bag body 2, it may be difficult for the pair of handles 21 to be caught by the hooks 41. Therefore, in the load lifting device 1, the pair of handles 21 are provided with spheres 22 as attracted members, and the spheres 22 are sucked by the suction device 5, thereby pulling up the pair of handles 21 in a lying down state and making it easier for them to be caught by the hooks 41.

[0027] The suction device 5 includes an air compressor 51 installed on the running body 31, an air gun 52 attached to the sling 4, and a hose 53 connecting the air compressor 51 and the air gun 52, and sucks the sphere 22 through a suction port 52A provided in the air gun 52.

[0028] In this embodiment, as shown in Fig. 2, air compressor 51 is placed on mounting base 314, which is provided in the space formed between left and right side frames 311L, 311R and in front of center frame 311C of chassis frame 311. In this case, hose 53 extending from air compressor 51 is led to the rotating unit 33 side via center joint 313 so as not to be twisted by the rotation of the rotating unit 33. Then, hose 53 led to the rotating unit 33 side is routed along the side surfaces of boom 341 and arm 343 to the hoisting device 4.

[0029] It should be noted that air compressor 51 does not necessarily have to be installed on running body 31, and may be installed, for example, at the rear end of revolving body 33, i.e., on the back surface of counterweight 333, as shown in Fig. 3. In this case, hose 53 extending from air compressor 51 is guided over revolving body 33 toward working device 34, and then routed along the side surfaces of boom 341 and arm 343 to lifting device 4.

[0030] Furthermore, the air compressor 51 does not necessarily have to be mounted on the hydraulic excavator 3, and may be placed on a predetermined placement location located in the peripheral area of ​​the hydraulic excavator 3 (lifting device), as shown in Fig. 4. In this case, however, it is necessary to determine the placement location of the air compressor 51 so that the length of the hose 53 is sufficient for the movement range of the lifting tool 4, i.e., the transport range of the load X.

[0031] (Configuration of sling 4) Next, the specific configuration of the suspender 4 will be described with reference to FIGS.

[0032] Fig. 5 is a front view showing an example of the configuration of the suspender 4 to which the air gun 52 is attached. Fig. 6 is a side view showing an example of the configuration of the suspender 4 to which the air gun 52 is attached. Fig. 7 is a diagram showing a state in which the suspender 4 is moved to bring the suction port 52A closer to the sphere 22. Fig. 8 is a diagram showing a state in which the sphere 22 is being sucked into the suction port 52A. Fig. 9 is a diagram showing a state in which the hook 41 is inserted into the hooking hole 120.

[0033] The sling device 4 has a hook 41 and a main body 42 attached to the tip of the arm 343. As shown in Fig. 6, the base end of the hook 41 is rotatably supported at the lower end portion of the main body 42 by a first support pin 43, which serves as a support pin having a horizontal axis. In response to operation by the operator, the hook 41 rotates vertically relative to the main body 42 around the first support pin 43, and moves between a closed position (position shown in Figs. 5 and 9) in which the tip faces upward and an open position (position shown in Figs. 7 and 8) in which the tip faces downward.

[0034] In this embodiment, the upper side of the main body 42 is attached to the tip of the arm 343 so that the axial direction of the first support pin 43 is the vehicle width direction (left-right direction) of the hydraulic excavator 3. Therefore, when the hook 41 rotates upward relative to the main body 42, it moves in a direction approaching the rotating unit 33, and on the other hand, when the hook 41 rotates downward relative to the main body 42, it moves forward in a direction away from the rotating unit 33.

[0035] In addition, the hook 41 is supported by a first support pin 43 on one side (the rotating body 33 side) of the lower end of the main body 42, and a rod-shaped stopper 44 that moves in conjunction with the hook 41 in response to the operator's operation is supported by a second support pin 45 on the other side of the lower end of the main body 42.

[0036] Like the first support pin 43, the second support pin 45 has an axis in the horizontal direction (in this embodiment, in the vehicle width direction of the hydraulic excavator 3), and the stopper 44 rotates in the vertical direction relative to the main body 42 around the second support pin 45.

[0037] Specifically, when the hook 41 rotates downward (in a direction moving forward and away from the rotating unit 33) relative to the main body 42 from the open position to the closed position, the stopper 44 rotates downward (in a direction approaching the rotating unit 33) relative to the main body 42 so as to approach the hook 41. That is, in this case, the hook 41 and the stopper 44 rotate in directions approaching each other, and at the closed position, their tips come into contact with each other, as shown in Figures 5 and 9. This prevents the pair of handles 21 hooked on the hook 41 from coming off the tips of the hook 41 and falling off.

[0038] On the other hand, when the hook 41 rotates upward relative to the main body 42 (in a direction approaching the rotating unit 33) from the closed position toward the open position, the stopper 44 rotates upward relative to the main body 42 (in a direction moving forward and away from the rotating unit 33) so as to move away from the hook 41. That is, in this case, the hook 41 and the stopper 44 rotate in directions away from each other, and at the open position, as shown in Figures 7 and 8, their tips are furthest apart.

[0039] It should be noted that the hook 41 and the stopper 44 do not necessarily need to rotate in a direction along the fore-and-aft direction of the hydraulic excavator 3; for example, they may rotate in a direction along the width direction of the hydraulic excavator 3, and may rotate within a vertical plane according to the site environment where the load hoisting device 1 is used and the specifications of the load X (such as the attachment state of the pair of handles 21).

[0040] (Configuration of suction device 5) Next, a specific configuration of the suction device 5 will be described with reference to FIGS.

[0041] FIG. 10 is a schematic diagram showing an example of the configuration of the suction device 5. As shown in FIG.

[0042] The suction device 5 uses suction force to suck in the spheres 22 attached to the pair of handles 21, lifting up the pair of handles 21 that were lying down on the upper part 2A of the bag body 2, and forming a hooking hole 120 between the pair of handles 21 and the upper part 2A of the bag body 2 (see Figures 8 and 9).

[0043] In this embodiment, a pair of handles 21 are attached to the bag body 2, and therefore the sphere 22 is provided on the overlapping region where the pair of handles 21 overlap. This overlapping region corresponds to the longitudinal center of the region of each handle 21 where the hooking hole 120 is formed between the handle 21 and the upper part 2A of the bag body 2 (i.e., the region facing the upper part 2A of the bag body 2). This allows the sling 4 to suspend and hold the load X in a balanced state.

[0044] In the suction device 5 according to this embodiment, as shown in FIG. 10, suction force is generated by an air compressor 51 that generates compressed air and an air gun 52 that sprays the compressed air supplied from the air compressor 51.

[0045] Air gun 52 includes body 521 formed with air inlet 521A to which air compressor 51 is connected and through which compressed air is supplied, and ejection port 521B through which the compressed air flowing in from air inlet 521A is ejected, and cylindrical tube 522 formed with suction port 52A and connected to the side of body 521 opposite to ejection port 521B. Ejection port 521B communicates with both air inlet 521A and suction port 52A.

[0046] Air gun 52 has a vacuum function, and when air compressor 51 is activated, compressed air flows into body 521, creating a negative pressure on the suction port 52A side, and external air is sucked into tube 522 through suction port 52A. The external air sucked into tube 522 through suction port 52A is then ejected to the outside through ejection port 521B together with the compressed air that has flowed into body 521 through air inlet 521A. In this way, suction device 5 generates a suction force for sucking in sphere 22 by creating a negative pressure on the suction port 52A side.

[0047] The suction device 5 does not necessarily have to generate suction force by creating negative pressure on the suction port 52A side using the air compressor 51 and the air gun 52, but may instead generate suction force using a vacuum, for example. However, when generating suction force using a vacuum, there is a possibility that the vacuum may become clogged, so it is preferable to generate suction force using negative pressure.

[0048] 5 to 9, suction port 52A is disposed opposite hook 41 in the closed position and opens downward. That is, hook 41 includes a portion that is disposed on an extension of the opening direction of suction port 52A in the closed position.

[0049] It is desirable that suction port 52A be open toward the center in the direction in which the base end and tip end of hook 41 are aligned in the closed position (corresponding to the front-to-rear direction of hydraulic excavator 3 in this embodiment). This causes sphere 22 sucked into suction port 52A to be positioned in the center of hook 41 in the closed position, making it possible to more reliably catch pair of handles 21 on hook 41.

[0050] When lifting load X, first, as shown in Fig. 7, the operator operates working device 34 to bring suction port 52A close to sphere 22 and rotates hook 41 to the open position. Next, as shown in Fig. 8, the operator activates air compressor 51 to suck sphere 22 with suction port 52A. As a result, pair of handles 21 are pulled up, forming hooking holes 120.

[0051] In this embodiment, tube 522 is formed in an expandable bellows shape, and when sphere 22 is sucked by suction port 52A, tube 522 contracts toward ejection port 521B. As a result, sphere 22 and pair of handles 21 are pulled up further by the amount of contraction of tube 522, and a larger hook hole 120 can be formed.

[0052] Moreover, because the member to be sucked is sphere 22, the shape is the same from any direction in 360 degrees, and it is possible to reliably suck in any part of sphere 22. Furthermore, in this embodiment, sphere 22 is formed of an elastic material such as rubber, which can prevent the bag body 2 from being damaged by sphere 22 or the sphere 22 from colliding with and damaging suction port 52A or its surrounding members.

[0053] As shown in Figures 8 and 9, sphere 22 is formed larger than the outer diameter of suction port 52A, but this is not limited thereto and sphere 22 may be formed to a size equal to or smaller than the outer diameter of suction port 52A, and there is no particular restriction on the size of sphere 22 as long as it can be sucked by suction port 52A.

[0054] 9, with the pair of handles 21 pulled up to form the hooking holes 120, the operator operates the hoisting tool 4 to rotate the hook 41 from the open position to the closed position. As a result, the hook 41 is inserted into the hooking hole 120, and the load X is suspended and held by the hoisting tool 4.

[0055] In this way, with the load lifting device 1, the pair of handles 21 that are in a lying position on the upper part 2A of the bag body 2 can be pulled up by suction force and hooked onto the hooks 41 of the lifting tool 4, so there is no need for an operator to perform the slinging work of slinging the pair of handles 21 onto the hooks 41 of the lifting tool 4. Furthermore, regardless of the type of substance contained in the load X stored in the bag body 2, the operator can lift the load X simply by operating the work device 34.

[0056] (Variation) Next, modified examples of the load hoisting device 1 according to the embodiment of the present invention will be described with reference to Figures 11 to 13. In Figures 11 to 13, components that are common to those described for the load hoisting device 1 according to the embodiment will be assigned the same reference numerals, and descriptions thereof will be omitted.

[0057] Fig. 11 shows a modified example of the load hoisting device 1, in which the sling 4 has been moved to bring the suction port 52A closer to the cord 23. Fig. 12 shows a modified example of the load hoisting device 1, in which the cord 23 is being sucked into the suction port 52A. Fig. 13 shows a modified example of the load hoisting device 1, in which the hook 41 has been inserted into the hooking hole 120.

[0058] In this modification, a string 23 is provided as another form of the attracted member on the pair of handles 21 of the bag body 2. The string 23 is made of, for example, a thin vinyl string, and is firmly tied to the overlapping region where the pair of handles 21 overlap each other.

[0059] As with sphere 22 in the embodiment, suction device 5 uses suction force to suck string 23. Since string 23 is often lighter than sphere 22, it can be sucked into tube 522 with a smaller suction force than sphere 22. Also, as shown in Figures 11 and 12, by pulling out end 23B of string 23 from knot 23A, the entire string 23 is easily sucked in, guided by end 23B sucked into tube 522 via suction port 52A (see Figure 13).

[0060] In this way, even if the attracted member is string 23, the same functions and effects as those of the embodiment can be achieved. As shown in Figures 11 and 12, it is desirable that knot 23A of string 23 is located in the center in the short direction of the overlapping region of paired handles 21. This allows paired handles 21 to be hung on hooks 41 in a balanced manner.

[0061] The above describes an embodiment of the present invention. However, the present invention is not limited to the above embodiment and includes various modifications. For example, the above embodiment has been described in detail to clearly explain the present invention, and is not necessarily limited to an embodiment including all of the described configurations. Furthermore, it is possible to replace part of the configuration of this embodiment with the configuration of another embodiment, or to add the configuration of another embodiment to the configuration of this embodiment. Furthermore, it is possible to add, delete, or replace part of the configuration of this embodiment with other configurations.

[0062] For example, in the above embodiment, a pair of handles 21 is attached to the bag body 2, but the number of handles 21 does not necessarily have to be a pair (two), and the number can be changed as appropriate depending on the durability of the material forming the handles 21 and the weight of the load X. However, when multiple handles 21 are attached to the bag body 2, it is desirable that the multiple handles 21 overlap each other at the center portions in the longitudinal direction in the region facing the upper part 2A of the bag body 2, as in the above embodiment.

[0063] Furthermore, in the above embodiment, since the item X was contained within the bag body 2, a pair of handles 21 were attached to the bag body 2, but this is not limited to this. For example, in the case of item X that does not require the bag body 2, the handles 21 may be attached to the item X itself. [Explanation of symbols]

[0064] 1: Load lifting device 2A: Upper 3: Hydraulic excavator (work machinery, lifting equipment) 4: Lifting equipment 5:Suction device 21: Handle 22: Sphere (attracted member) 23: String (filament, attracted member) 23A: Knot 31: Running body 33: Rotating body 34: Work equipment 41: Hook 43: First support pin (support pin) 51:Air compressor 52: Air gun 52A: Suction port 120: Hook hole 343: Arm (arm component) 521: Body 521A: Air supply port 521B: Injection port 522:Tube X: Load

Claims

1. a attracted member provided on a flexible wire handle attached to the load; a suction device that sucks the attracted member and pulls up the handle in a lying position to form a hook hole between the handle and an upper portion of the load; a hanging tool having a hook-shaped hook that is inserted into the hook hole and hangs on the handle; a lifting device that lifts the load hung on the lifting tool; In a load lifting device comprising: The hook is a base end portion of the sling is rotatably supported on a main body portion of the sling by a support pin having a horizontal axis, and the sling moves between a closed position in which the tip portion faces upward and an open position in which the tip portion faces downward by rotating vertically relative to the main body portion around the support pin; The suction device is a tube that is an expandable and contractible bellows-like cylinder and is disposed opposite the hook in the closed position and has a suction port that opens downward; The tube When the member to be attracted is attracted by the suction port due to the suction force, the bellows contracts in the extending direction. A load lifting device characterized by the above.

2. The load lifting device according to claim 1, The suction port is The hook is open toward the center in the arrangement direction of the base end and the tip end of the hook in the closed position. A load lifting device characterized by the above.

3. The load lifting device according to claim 1, The suction device is By creating a negative pressure on the suction port side, a suction force is generated that sucks from the outside to the inside of the suction device through the suction port. A load lifting device characterized by the above.

4. The load lifting device according to claim 3, The suction device is an air compressor for generating compressed air; an air gun that sprays compressed air supplied from the air compressor, The air gun is a body having an air intake port connected to the air compressor to supply compressed air and an injection port for injecting the compressed air flowing in from the air intake port; a tube connected to the body on the opposite side to the injection port, the tube having the suction port formed at a tip thereof, When the air compressor is activated, External air is drawn into the tube through the suction port, The external air sucked into the tube through the suction port is ejected to the outside through the ejection port together with the compressed air flowing into the body through the air inlet. A load lifting device characterized by the above.

5. The load lifting device according to claim 1, The attracted member is A sphere, The handle is attached to the center of the longitudinal direction of the area that forms the hook hole between the handle and the top of the load. A load lifting device characterized by the above.

6. The load lifting device according to claim 5, The sphere is formed of an elastic material. A load lifting device characterized by the above.

7. The load lifting device according to claim 1, The attracted member is The striatum, The handle is attached to the center of the longitudinal direction of the area that forms the hook hole between the handle and the top of the load. A load lifting device characterized by the above.

8. The load lifting device according to claim 7, The knot of the filament is located at the center of the handle in the lateral direction. A load lifting device characterized by the above.

9. The load lifting device according to claim 1, The lifting device is A work machine equipped with a work device having an arm member with the lifting tool attached to the tip end thereof, wherein the work device is operated to lift the load. A load lifting device characterized by the above.

10. The load lifting device according to claim 4, The lifting device is a running body for running on a road surface; a rotating body provided rotatably above the traveling body; a working device attached to the front of the rotating body and having an arm member with the lifting tool connected to its tip; A work machine comprising: The air compressor is Located at the front end of the traveling body or the rear end of the rotating body A load lifting device characterized by the above.

Images