Lifting device for horizontal members

Abstract

The present invention provides a lifting device for horizontal members that allows for lifting and unlifting of horizontal members by attaching and detaching the lifting hooks to the horizontal member, which has a main surface without lifting fittings arranged horizontally. [Solution] The horizontal member lifting device 10 of the present invention comprises a lifting body 12 that can be lifted and transported by a crane, A hole saw 26 is attached to the lifting body 12 and extends toward a horizontally positioned horizontal member, on which one main surface of the lifting body sits, to drill a hole in the one main surface. The invention is characterized by having a locking mechanism 30 positioned around the rotation axis of the hole saw 26, in which, after drilling with the hole saw 26, the locking body 32, which is reduced in diameter toward the axis of the insertion hole as the hole saw 26 extends, is inserted from one main surface, and after penetration, the locking body 32 expands in diameter and locks onto the other main surface.

Description

Technical Field

[0005]

[0001] The present invention relates to a hanging device for a horizontal member for hanging and removing a weight when lifting and transporting a horizontal member having a main surface arranged horizontally.

Background Art

[0002] When performing demolition work on various manufacturing plants, there are operations for lifting and transporting components of various shapes. When there are hanging brackets on the components to be lifted and transported, the lifting and transporting work can be carried out using a device (for example, disclosed in Patent Document 1) that can remotely and automatically hang and remove the weight. Also, when there are holes in the components to be lifted and transported, lifting tools that expand the diameter inside the holes and lifting pins can be inserted to carry out the lifting and transporting work (for example, disclosed in Patent Document 2). In addition, when there are no holes in the components to be lifted and transported, the lifting and transporting work can be carried out by sandwiching both ends of the component using a clamp or the like (for example, disclosed in Patent Document 3).

[0003] However, there may be cases where the components do not have hanging brackets or holes. In such cases, the lifting and transporting work cannot be carried out with the configurations of Patent Documents 1 and Patent 2. Also, in the configuration of sandwiching the component, there is a risk of coming off during the lifting and transporting work. Among the components for which the lifting and transporting work is carried out, there are components such as the top plate of a storage tank whose main surface is arranged horizontally. For such large components, there are no lifting tools or holes, and the risk of coming off increases even more when sandwiching both ends of the component for lifting and transporting.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Patent Document 2

Patent Document 3

Summary of the Invention

Problems to be Solved by the Invention

[0005] The problem that the present invention aims to solve is, in view of the problems of the prior art described above, to provide a lifting device for horizontal members that can be used to lift and transport horizontal members with a main surface without lifting fittings that is horizontally arranged. [Means for solving the problem]

[0006] The present invention, as a first means for solving the above problems, provides a lifting body that can be lifted and transported by a crane, A hole saw that is attached to the aforementioned suspension body and extends toward a horizontally positioned horizontal member on which one main surface of the suspension body sits, and drills a hole in the aforementioned main surface, The objective is to provide a lifting device for a horizontal member, characterized by having a lifting section arranged around the rotation axis of the hole saw, in which, after drilling with the hole saw, a locking body that has decreased in diameter toward the axis of the insertion hole as the hole saw extends is inserted from one main surface, and after penetration, the locking body expands in diameter and locks onto the other main surface. According to the first method described above, the main surface without lifting fittings can be automatically attached to and detached from a horizontal member positioned horizontally, allowing for safe lifting and transport. Even with remote operation, there is no risk of the lifting sling coming loose during lifting, ensuring safe operation.

[0007] As a second means to solve the above problems, the present invention provides a lifting device for horizontal members, characterized in that, in the first means, the locking body has a first enlarged diameter portion and a second enlarged diameter portion from the tip, and a reduced diameter portion between the first and second enlarged diameter portions, and is divided along the longitudinal direction, and the plurality of members are equipped with a coil spring that biases in the direction of enlargement. According to the second method described above, the rigging and unrigging can be performed without removing the hole saw from the hole, by moving it in the same direction as the forward and backward movement of the hole saw, in other words, with the hole saw inserted into the hole.

[0008] As a third means for solving the above problems, the present invention provides that in the first means, the hole saw and the lifting part are attached to a stage that moves up and down inside the lifting body, A drilling confirmation unit confirms that the hole saw has drilled through the horizontal member, The objective is to provide a lifting device for horizontal members, characterized by comprising a control unit that increases the feed speed of the stage when the perforation confirmation unit confirms that perforation has occurred. According to the third method described above, the movement speed of the stage after drilling can be increased to be faster than the movement speed of the stage matched to the movement speed of the hole saw during drilling, thereby shortening the time required for rigging work.

[0009] As a fourth means for solving the above problems, the present invention provides a lifting device for horizontal members, characterized in that, in the first means, it is equipped with an electromagnetic diameter reduction fixing part that fixes the locking bodies when the plurality of locking bodies are reduced in diameter. According to the fourth method described above, the reduced diameter state of the multiple locking bodies can be reliably maintained by automatic control, making the ball removal operation easier.

[0010] As a fifth means to solve the above problems, the present invention provides a lifting device for a horizontal member, characterized in that, in the first means, the lifting body is provided with an electromagnetic seating and fixing part at a location facing one of the main surfaces of the horizontal member on which it is seated. According to the fifth method described above, the suspension unit can be automatically fixed to the horizontal member when drilling with a hole saw, preventing the suspension unit from shifting position during drilling and thus improving the safety of the drilling operation. [Effects of the Invention]

[0011] According to the present invention, horizontal members can be lifted and transported by attaching and detaching slings to horizontal members that do not have lifting fittings. Since slinging and detachment can be performed automatically by sitting on a horizontal member with its main surface horizontally positioned, lifting and transport operations can be performed remotely even at high places or in locations that are not easily accessible to people. [Brief explanation of the drawing]

[0012] [Figure 1] This is a schematic diagram of the configuration of the lifting device for horizontal members according to the present invention. [Figure 2] It is a schematic diagram of the structure of the ball hanging of the ball hanging device for the horizontal member of the present invention. [Figure 3] It is a schematic explanatory diagram 1 of the ball hanging process using the ball hanging device for the horizontal member of the present invention. [Figure 4] It is a schematic explanatory diagram 2 of the ball hanging process using the ball hanging device for the horizontal member of the present invention. [Figure 5] It is a schematic explanatory diagram 3 of the ball hanging process using the ball hanging device for the horizontal member of the present invention. [Figure 6] It is a schematic explanatory diagram 1 of the ball removing process using the ball hanging device for the horizontal member of the present invention. [Figure 7] It is a schematic explanatory diagram 2 of the ball removing process using the ball hanging device for the horizontal member of the present invention. [Figure 8] It is a schematic explanatory diagram 3 of the ball removing process using the ball hanging device for the horizontal member of the present invention.

Embodiments for Carrying out the Invention

[0013] The embodiments of the ball hanging device for the horizontal member of the present invention will be described in detail below with reference to the drawings. In the present invention, the horizontal member is a member of magnetic metal having a main surface arranged horizontally, for example, the top plate of a tank or the like. This horizontal member targets hanging brackets or members without holes.

[0014] [Ball Hanging Device 10 for Horizontal Member] FIG. 1 is a schematic configuration diagram of the ball hanging device for the horizontal member of the present invention. FIG. 2 is a schematic configuration diagram of the ball hanging of the ball hanging device for the horizontal member of the present invention. As shown in the figure, the ball hanging device 10 for the horizontal member of the present invention includes a lifting body 12 that can be lifted and transported by a crane, a hole saw 26 that is attached to the lifting body 12 and extends toward a horizontal member having a horizontal main surface on which the lifting body 12 sits and punches the main surface, and a locking body 32 that is arranged around the rotation axis of the hole saw 26 and is inserted from the main surface after the hole saw 26 punches a hole, and whose diameter is reduced toward the axis of the insertion hole 19 as the hole saw 26 extends, and includes a ball hanging portion 30 in which the locking body 32 expands in diameter after passing through and locks to the other main surface.

[0015] The hanging and transporting body 12 is a cubic casing composed of an upper plate 14, a lower plate 16, and columns 18. Between the upper and lower plates 14 and 16, two feed screws 22 are provided along the columns 18 inside the columns 18. Both ends of the columns 18 are fixed to the upper and lower plates 14 and 16, and both ends of the feed screws 22 are rotatably supported by the upper and lower plates 14 and 16. At the center of the upper surface of the upper plate 14, a shackle 13 to which the wire of the crane is connected is provided, and on the side, a lifting motor 15 for the stage 24 is installed.

[0016] On the lower surface of the upper plate 14, a drilling confirmation part (such as an encoder 17) is installed. The encoder 17 can measure the rotation speed of the feed screw 22 and detect the position of the hole saw 26. The drilling confirmation part is not limited to the encoder, and other components such as a distance sensor can also be used to detect the position of the hole saw 26. Such a drilling confirmation part can detect the position of the hole saw 26 and confirm that the horizontal member has been drilled. The control unit 20 is electrically connected to the drilling confirmation part and the lifting motor 15. When the control unit 20 confirms that the drilling confirmation part has drilled, it controls to increase the feed speed of the lifting motor 15.

[0017] The lower plate 16 is installed around an opening through which the hole saw 26 and the ball hanging part 30 are inserted. On the lower surface of the lower plate 16, an electromagnetic seating fixing part 16a for the horizontal member is provided. The electromagnetic seating fixing part 16a is an electromagnet that generates and disappears magnetic force depending on the presence or absence of current, and can be attached to and detached from a horizontal member made of magnetic metal.

[0018] A slightly smaller stage 24 is installed between the upper and lower plates 14 and 16. The stage 24 is provided with nuts that are screwed onto the feed screws 22. On the upper surface of the stage 24, a cutting motor (not shown) that serves as the drive source for the hole saw 26 is installed. The stage 24 is provided with the hole saw 26 and the ball hanging part 30 protruding downward from the lower surface and protruding toward the opening of the lower plate 16.

[0019] In this configuration, the stage 24 can move up and down between the upper and lower plates 14 and 16 along the longitudinal direction of the lead screw 22 by the forward and reverse rotation of the lifting motor 15. The hole saw 26 is rotatable using a cutting motor as its driving source, and as the stage 24 moves up and down, it can drill holes from the upper surface of the lower plate 16, through the opening, and protrude from the lower surface toward the horizontal member 11 below. The lifting section 30 includes a pair of locking bodies 32, an electromagnetic diameter reduction fixing section 34, and a coil spring 36.

[0020] The locking body 32 is a member that is positioned around the rotation axis of the hole saw 26 and moves horizontally radially from the axis. The locking body 32 is an arrowhead-shaped member that has a first enlarged diameter section 32a and a second enlarged diameter section 32b from the tip (lower end), and a reduced diameter section 32c between the first and second enlarged diameter sections, and is divided into multiple sections along the longitudinal direction (two members are shown in the figure). The upper end of the locking body 32 is connected to an electromagnetic reduced diameter fixing section 34 on the stage 24.

[0021] The electromagnetic diameter reduction fixing part 34 is positioned on the stage 24. This electromagnetic diameter reduction fixing part 34 is an electromagnet similar to the electromagnetic seating fixing part 16a, and its magnetic force is generated and extinguished depending on the presence or absence of electric current, so that it can electromagnetically attract the locking body 32 when it approaches. The coil spring 36 is a compression spring in which one end is fixed to one locking body 32 and the other end is connected to the other locking body 32, biasing the pair of locking bodies 32 in a direction that expands their diameter.

[0022] In this configuration, the sling 30 typically opens in a direction that expands in diameter from the axis of rotation of the hole saw 26 due to the biasing force of the coil spring 36. The expansion distance of the locking body 32 is set to be larger than the diameter of the hole drilled by the hole saw 26. As the hole saw 26 extends, the expanded locking body 32 contracts along the inclination of the first expanded portion 32a as it enters the drilled hole, causing the coil spring 36 to contract. Once the first expanded portion 32a has passed through the drilled hole, the locking body 32 expands again due to the biasing force of the coil spring 36 extending at the contracted portion 32c, and the first expanded portion 32a locks to the back surface of the horizontal member 11 (see Figure 2). This allows the sling to be attached to the hole drilled in the horizontal member.

[0023] To remove the ball, the stage 24 is moved downward, allowing the second locking portion 32b of the locking body 32 to enter the drilled hole. This causes the coil spring 36 to contract along the inclination of the second enlarged portion 32b. The locking body 32 is set to be smaller than or equal to the diameter of the hole drilled by the hole saw 26 when it is most contracted. When the electromagnetic contraction fixing part 34 is activated in this state, it electromagnetically adheres to the locking body 32, maintaining the contracted size of the locking body 32. This allows the ball to be removed from the ball-hanging part 30 through the preceding insertion hole 19 of the horizontal member, and the hole saw 26 to be pulled up from the insertion hole 19.

[0024] [Effect] The method for attaching and detaching horizontal members using the horizontal member lifting device of the present invention, configured as described above, will be explained below.

[0025] (Lifting / Slinging) Figure 3 is a schematic diagram 1 illustrating the lifting process using the lifting device for horizontal members of the present invention. Figure 4 is a schematic diagram 2 illustrating the lifting process using the lifting device for horizontal members of the present invention. Figure 5 is a schematic diagram 3 illustrating the lifting process using the lifting device for horizontal members of the present invention. The lifting body 12, which has been lifted by the crane, is placed on the horizontal member 11. The electromagnetic seating and fixing part 16a is activated to fix the lifting body 12 to the horizontal member 11.

[0026] The cutting motor is activated to rotate the hole saw 26. Next, the lifting motor 15 is activated to move the stage 24 downwards. The hole saw 26 drills a hole in the horizontal member 11 (see Figure 3). During drilling, the drilling confirmation unit (encoder 17) measures the rotation speed of the feed screw 22 to detect the position of the hole saw 26. Once the drilling confirmation unit confirms that the hole saw 26 has drilled, the control unit 20 increases the speed of the lifting motor 15 to move the locking part 32 into the insertion hole 19 (see Figure 4). After the hole saw 26 drills through the horizontal member 11, the locking body 32 of the lifting section 30 enters the hole following the hole saw 26 that has passed through the insertion hole 19. The locking body 32 contracts in diameter along the inclination of the first enlarged diameter section 32a, and the coil spring 36 shrinks (see Figure 4). When the first expanding portion 32a passes through the drilled hole, the locking body 32 expands again due to the biasing force of the coil spring 36 extending at the contracting portion 32c. This allows the locking body 32 to be attached to the hole drilled in the horizontal member 11 (see Figure 5). After that, the horizontal member is lifted and transported by crane.

[0027] (Removing the balls) Figure 6 is schematic diagram 1 of the lifting process using the lifting device for horizontal members of the present invention. Figure 7 is schematic diagram 2 of the lifting process using the lifting device for horizontal members of the present invention. Figure 8 is schematic diagram 3 of the lifting process using the lifting device for horizontal members of the present invention. To remove the ball, the stage 24 is moved downward, causing the second enlarged portion 32b of the locking body 32 to enter the insertion hole 19. The coil spring 36 then shrinks along the inclination of the second enlarged portion 32b (see Figure 6).

[0028] When the electromagnetic diameter reduction fixing part 34 is activated while the locking body 32 is at its most reduced diameter, it is electromagnetically attracted to the locking body 32, maintaining the reduced diameter of the locking body 32 (see Figure 7). Next, the sling 30 can be removed from the insertion hole 19 of the horizontal member 11, and the hole saw 26 can be pulled up from the insertion hole 19 (see Figure 8). According to this invention, horizontal members can be lifted and transported by attaching and detaching slings to horizontal members that do not have lifting hardware. Since slinging and detachment can be performed automatically by sitting on a horizontal member with its main surface horizontally positioned, lifting and transport operations can be performed remotely even at high places or in places where people cannot easily enter.

[0029] The lifting device 10 for horizontal members of the present invention may be configured to lift and remove multiple lifting bodies 12 with a crane, depending on the size of the horizontal member 11. Furthermore, the control unit 20 of the horizontal member lifting device 10 may be configured to control various operations by electrically connecting to the lifting motor 15, the electromagnetic seating fixing unit 16a, and the electromagnetic diameter reduction fixing unit 34. A communication unit via wired or wireless lines is also provided for remote operation, allowing lifting operations to be performed remotely even at high places or locations that are difficult for people to access.

[0030] Preferred embodiments of the present invention have been described above. However, the present invention is not limited in any way to the above embodiments, and various modifications are possible without departing from the spirit of the invention. Furthermore, the present invention is not limited to the combinations shown in the embodiments, but can be implemented using various combinations. [Explanation of Symbols]

[0031] 10. Lifting device for horizontal members 11 Horizontal members 12 Lifting and transporting unit 13 Shackles 14 Top board 15 Lifting motor 16 Lower plate 16a Electromagnetic seating fixing part 17 Encoders 18 pillars 19 Through hole 20 Control Unit 22 Lead screw 24 stages 26 Hole saw 30 Sling section 32 Locking body 32a 1st enlarged diameter section 32b 2nd enlarged diameter section 32c Reduced diameter part 34 Electromagnetic diameter reduction fixing part 36 Coil springs

Claims

1. A lifting and transporting unit that can be lifted and transported by a crane, A hole saw that is attached to the aforementioned suspension body and extends toward a horizontally positioned horizontal member on which one main surface of the suspension body sits, and drills a hole in the aforementioned main surface, A lifting device for a horizontal member, characterized by having a lifting section arranged around the rotation axis of the hole saw, in which, after the hole saw drills, a locking body that has been reduced in diameter toward the axis of the insertion hole as the hole saw extends is inserted from one main surface, and after penetration, the locking body expands in diameter and locks onto the other main surface.

2. A lifting device for a horizontal member as described in claim 1, The locking body is a plurality of members divided along the longitudinal direction, each having a first enlarged diameter portion and a second enlarged diameter portion from the tip, and a reduced diameter portion between the first and second enlarged diameter portions, and the plurality of members are equipped with coil springs that bias in the direction of enlargement.

3. A lifting device for a horizontal member as described in claim 1, The hole saw and the lifting sling are attached to a stage that moves up and down inside the lifting body. A drilling confirmation unit confirms that the hole saw has drilled through the horizontal member, A lifting device for a horizontal member, characterized by comprising a control unit that increases the feed speed of the stage when the perforation confirmation unit confirms that perforation has occurred.

4. A lifting device for a horizontal member as described in claim 1, A lifting device for a horizontal member, characterized by having an electromagnetic diameter reduction fixing part for fixing the locking body when the locking body is reduced in diameter.

5. A lifting device for a horizontal member as described in claim 1, The lifting device for a horizontal member is characterized in that the lifting body is provided with an electromagnetic seating and fixing part at a location facing one of the main surfaces of the horizontal member on which it is seated.

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