JP2528382B2 - Sling hanger - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sling device for a crane (hoist), and more particularly, to a sling device equipped with a sling feeding / storing device, that is, a sling type hanger.

[Conventional technology]

Since long ago, wire ropes or slings have been manually slung over heavy loads to be carried by cranes, and even now, this is the most common cargo handling method, but in recent years it has been labor-saving. Various types of hoisting gear have been developed aiming at.

FIG. 5 and FIG. 6 show a typical conventional hoisting tool, in which a winding drum 42 of a moving sling 41 is mounted on a horizontal frame 1 which is suspended and supported by a crane via a hanging metal fitting 40. The central shaft 17 fixed to is rotatably attached,
Drive device for rotating the winding drum 42 around the frame 1
43 is fixed, the feeding pulley 7 is attached to one side of the frame 1, and a drive device 66 for rotating the feeding pulley 7 is fixed, and a pressing roller 44 facing the upper portion of the feeding pulley 7 is fixed. , Frame 1
The guide arm 4 is attached to the piston rod of a pressing cylinder 45 fixed to the frame 1, and is further pivotally attached to one end of the frame 1 by a pivot 18. The guide arm 4 has a vertical arm 46 having a space open downward and a load 47. And a groove-shaped guide member 20 having a space open to the above, and a guide slope 21 is provided at an upper part in the vertical arm 46.

The upper portion of the lower guide arm 48 is pin-connected to the vertical arm 46 via the guide cover pressing arm 49, and the pressing spring (not shown) provided in this pin connecting portion causes the lower guide arm 48 to groove. Drive device for pushing back toward the guide member 20 and pulling back to the guide arm 4.
Drum 30 fixed and rotated by its drive 30
The rope 31 fed from 50 is inserted into the plurality of guide fittings 33 attached to the groove-shaped guide member 20, and
The rope 31 is wound around a roller 51 attached to the lower portion of the groove-shaped guide member 20, and the tip end portion of the rope 31 is connected to a rope attachment fitting 32 attached to the lower portion of the lower guide arm 48. Run the normal rotation of the rope 31
When is wound around the drum 50, the lower guide arm 48 is pulled back toward the groove-shaped guide member 20.

The counterweight 13 is provided at the other end of the frame 1, the base end of the fixed sling 52 is attached via the support shaft 11, and the upper end of the support arm 53 is attached to the other end of the frame 1. A position adjusting screw rod 12 is screwed into a female screw member 54 pivotally attached by a pin and attached to the other end of the frame 1, and the end portion of the screw rod 12 has the support arm 53.
Is connected to the fixed sling 52 so as to be rotatable and movable in the longitudinal direction of the arm.
It is supported by a supporting roller 55 attached to the lower part of 53, the connecting fitting 27 is attached to the tip of the fixed sling 52, and the operating rod is attached to the lower part of the other end of the frame 1.
When a limit switch 57 having 56 is attached and the load 47 is raised and hits the operating rod 56, the operating rod 56 operates the limit switch 57 to stop the operation of the drive devices 43 and 66.

When the moving sling 41 is inserted through the central hole of the load 47 made of a steel plate coil, the winding drum 42 of the moving sling 41 is rotated in the feeding direction, the feeding pulley 7 is rotated, and the feeding force of the moving sling 41 is increased. In order to make it larger, the pressing cylinder 45 is extended and the feeding pulley 7
The moving sling 41 is strongly gripped by the pressing roller 44 and the moving sling 41, which is moved toward the connecting fitting 27 at the tip of the fixed sling 52 through the central hole of the luggage 47,
Next, the tip of the moving sling 41 is manually connected to the connecting fitting 27.

In this way, the winding drum 42 and its drive device 43 are provided on the moving sling side, but the winding drum and its drive device are not provided on the fixed sling side. .

[Problems to be Solved by the Invention]

In the case of the conventional hanging device, the winding drum and its drive unit are provided on the moving sling side, but the winding drum and its drive unit are not provided on the fixed sling side, so After the sling is delivered, the length of the left and right slings of the luggage 47 is limited by the sling withdrawal amount until the worker further withdraws the moving sling and hangs it on the connecting fitting 27.

Therefore, the sling withdrawal amount is different each time the sling is hung on the luggage 47 or due to individual differences in the worker's physical strength, and the withdrawal amount is not always constant.
The sling lengths on the left and right become uneven, which causes the hoisted baggage 47 to tilt, and in the worst case, when trying to hoist the baggage, the baggage may be greatly tilted and cannot be hoisted.

It is an object of the present invention to provide a sling type hanging device that can lift a load without inclining it.

[Means for solving the problem]

In order to achieve the above object, in the sling type suspension of the present invention, the frame 1 in which the upper portion of the vertical arm 19 is fixed
Is provided with a first sling winding drum 5A rotated by a driving device 6A and a second sling winding drum 5B rotated by a driving device 6B. The vertical arm 19 has an upper portion of a lower guide arm 22. It is rotatably attached, and the pressing roller 9 is attached to the lower part of the lower guide arm 22 thereof.
The vertical arm 19 is provided with a turning device that turns the lower guide arm 22 in a direction to move away from the vertical arm 19, and a turning device that turns the lower guide arm 22 in a direction to approach the vertical arm 19. The first sling 2 fed from the first sling winding drum 5A is arranged between the pressing roller 9 and the vertical arm 19.

〔Example〕

 The present invention will now be described in detail with reference to the illustrated example.

1 to 4 show an embodiment of the present invention, in which the upper ends of a pair of upper guide arms 34A and 34B are pivotally attached to a horizontal frame 1 at the lower middle portion of a horizontal frame 1. An expansion spring (not shown) for rotating the upper guide arms 34A, 34B to rotate them so as to open them is engaged with the upper guide arms 34A, 34B and supported on the lower ends of the upper guide arms 34A, 34B. The rollers 55A and 55B are attached to the frame 1
The first sling winding drum 5A and its driving device 6A, the second sling winding drum 5B and its driving device 6B, the first sling supporting roller 35A and the second sling supporting roller 35B And a vertical arm 19 perpendicular to one end of the frame 1 is fixed, and a counterweight 13 for improving weight balance is attached to the other end of the frame 1.

The rotation of the drive unit 6A is transmitted to the winding drum 5A via the toothed drive pulley 14A, the toothed belld 16A and the toothed driven pulley 15A, and the rotation of the drive unit 6B is changed to the toothed drive pulley 14B and the toothed drive pulley 14B. It is transmitted to the winding drum 5B via the attached belt 16B and the toothed driven pulley 15B.

The drive devices 6A and 6B are rotary shafts 5 fitted and fixed to the output shaft.
8, toothed drive pulleys 14A, 14B are rotatably fitted, and electromagnetic clutches 38A, 38B for connecting the rotary shaft 58 and the toothed drive pulleys 14A, 14B to the rotary shaft 58.
The electromagnetic clutches 38A and 38B are operated so that the electromagnetic clutches 38A and 38B are turned on when the sling is wound around the winding drums 5A and 5B, and are turned off otherwise.
Reverse rotation preventing pawl wheels 39A, 39B are fixed to the side portions of 5A, 5B, and a pawl piece (not shown) is pivotally mounted on a support frame 59 supporting the drive devices 6A, 6B and winding drums 5A, 5B. The claw wheel 39 is attached to the claw wheel 39 by being pressed by the engaging spring.
When the sling is wound by positively rotating the winding drums 5A and 5B engaged with A and 39B, the ratchet wheels 39A and 39B rotate freely with respect to the claw pieces, and the ratchet wheels 39A and 39B rotate in the reverse direction. When trying, the reverse rotation of the ratchet wheels 39A, 39B is prevented by the claw pieces.

Therefore, rotation of the winding drums 5A and 5B in the winding direction is allowed, but rotation of the winding drums 5A and 5B in the rewinding direction is prevented. However, if the claw pieces are removed from the ratchet wheels 39A, 39B, the winding drums 5A, 5B can be rotated in the rewinding direction.

The upper end of the lower guide arm 22 is attached to the vertical arm 19 along the horizontal axis.
The vertical arm 19 and the lower guide arm are pivotally attached by 60.
The middle portion of 22 is connected via a pulling tension spring 23 made of a spiral spring, and the pulling spring 23 pulls the lower guide arm 22 toward the vertical arm 19.

The vertical arm 19 is pivotally mounted on a cylinder of the pushing cylinder 10 which is a fluid pressure cylinder or an electric cylinder, and a supporting member 61 is fixed to the tip end of a moving member which is a piston rod or a moving rod of the pushing cylinder 10. One end of a link 62 is pivotally attached to the support member 61, and the other end of the link 62 is rotatably and detachably connected to an intermediate body of the lower guide arm 22 by a pin 63.
When the extrusion cylinder 10 is extended, the lower guide arm
22 is pushed and rotated in the direction away from the vertical arm 19 against the force of the tension spring 23.

A feed roller 65 rotated by a drive device 8 and a chain wheel 24 are attached to a lower portion of the vertical arm 19, and the chain wheel 24
The magnet 26 is attached to the tip of the sling transfer chain 25 meshed with the first sling 2, and the guide fitting 28 pivotally attached to the magnet 26 is attached to the tip of the first sling 2. A guide roller 29 is attached to the lower end and the lower end of the lower guide arm 22.

A connecting fitting 27 is attached to the tip of the second sling 3 fed from the winding drum 5B, and is fed from the winding drum 5A through a roller 35A, a supporting roller 55A, a feeding roller 65, a pressing roller 9 and a guide roller 29. Roller from the tip of the first sling 2 and the winding drum 5B.
The tip end portion of the second sling 3 that has been fed out through the 35B and the support roller 55B is connected via a connecting fitting 27. Two sets of the first sling 2 and the second sling 3 are provided.

FIG. 2 shows that the first sling 2 is passed between the floor 47 and the luggage 47 made of steel sheet sheets for packing placed on the floor 64.
The state in which the front end of the sling 2 and the front end of the second sling 3 are connected to each other via the connecting fitting 27 and the load 47 is lifted is shown. An example of a work procedure until this state is set will be described with reference to FIGS. 1 to 4.

First, as shown in FIG. 1, after lowering the lower end of the vertical arm 19 in the suspension to the floor surface 64, the electromagnetic clutches 38A, 38B are
Is turned off, then the extrusion cylinder 10 is shortened, and the lower guide arm 22 is moved to the vertical arm 19 by the force of the tension spring 23.
After the first sling 2 is gripped by the feed roller 65 mounted on the vertical arm 19 and rotated by the drive device 8 and the holding roller 9 mounted on the lower end of the lower guide arm 22, The winding drum 5A is rotated in the feeding direction to feed the first sling 2, and the first sling 2 is inserted between the luggage 47 and the floor surface 64.

After the feeding of the first sling 2 is completed, the pushing cylinder 10 is extended to move the lower guide arm 22 to the vertical arm 19.
The gripping of the first sling 2 by the pressing roller 9 and the feed roller 65 is released by rotating the first sling 2 by rotating in a direction away from the second sling 3. It is connected to the connecting fitting 27 attached to.

Then, the sling type hoisting tool is hoisted by the crane through the hanging metal fitting 40 until the lower end of the vertical arm 19 reaches a high level from the upper surface of the luggage 47, and the required length of the first sling 2 from the winding drum 5A. Wound drum 5B
The second sling 3 is fed from the above to the required length, and the lengths of the vertical portions of the four hanging slings become substantially equal.

Next, the claw pieces are engaged with the respective ratchet wheels 39A, 39B to prevent rotation of the winding drums 5A, 5B in the sling payout direction, and then the crane is further lifted to suspend the load 47 from the floor or the ground. It is lifted and moved away. When the luggage 47 is thus lifted off the floor surface or the ground, the tension of each sling 2 and 3 causes the pair of upper guide arms 34A and 34B to move.
Are rotated in a direction in which they approach each other, and the lower guide arm 22 is rotated in a direction in which they move away from the vertical arm 19.

When carrying out the present invention, for example, an electric motor with a speed reducer is used as the drive devices 6A, 6B and 8.

[Effects of the Invention] Since the present invention is configured as described above, it has the effects described below.

Luggage 47 delivered from the first sling winding drum 5A
The first sling 2 passed through the lower or central hole of the
After connecting the second sling 3 fed from the winding drum for sling 5B, and lifting the frame 1 of the sling-type lifting device with the crane, the first sling 2 from the winding drum 5A has the required length. And the second sling 3 is fed from the winding drum 5B by the required length, the hanging lengths of the first sling 2 and the second sling 3 can be equalized, and therefore, the load When hoisting 47, the luggage 47 can be prevented from inclining and the luggage can be safely hoisted and transported.

[Brief description of drawings]

1 to 4 show an embodiment of the present invention. In FIG. 1, the sling type hanger is aligned with the load placed on the floor and the hanger is seated. FIG. 2 is a side view showing a state, FIG. 2 is a side view showing a state in which a load is suspended and supported by a lifting tool, FIG. 3 is a vertical sectional front view showing a structure around a winding drum and its driving device, and FIG. It is a vertical side view which shows the sling transfer guide device in the lower part of an arm and the lower part of a lower guide arm. FIGS. 5 and 6 show a conventional sling type hanging device. FIG. 5 shows a sling which is inserted into a central hole of a packaged steel strip coil placed in a package room and which is to be inserted through the movable sling. FIG. 6 is a partial vertical cross-sectional side view showing a state in which the fixed sling is connected, and FIG. In the figure, 1 is a frame, 2 is a first sling, 3 is a second sling, 5A is a first sling winding drum, 5B is a second sling winding drum, 6A and 6B are drive devices, and 8
Is a drive unit, 9 is a presser roller, 10 is an extrusion cylinder,
19 is a vertical arm, 22 is a lower guide arm, 23 is a pulling tension spring, 24 is a chain wheel, 25 is a sling transfer chain, and 26 is a chain.
Is a magnet, 27 is a connecting metal fitting, 28 is a guide metal fitting, 29 is a guide roller, 47 is luggage, 55A and 55B are bearing rollers, 62 is a link, 63 is a pin, and 65 is a feed roller.

Front page continued (72) Inventor Kenji Numajiri 46-59 Nakahara, Tobata-ku, Kitakyushu, Fukuoka Prefecture Machinery and Plant Division, Nippon Steel Corporation (72) Suta Igata 46 Nakahara, Tobata-ku, Kitakyushu, Fukuoka Prefecture 59 Nippon Steel Co., Ltd., Machinery & Plant Division (72) Inventor Tetsuya Hayakawa 46-59, Nakahara, Tobata-ku, Kitakyushu, Fukuoka Prefecture 59-59 Nippon Steel Co., Ltd., Machinery & Plant Division (72) Inventor Kenji Hirano Kitakyushu, Fukuoka 46-59 Nakahara, Tobata-ku, Nakahara Machinery & Plant Division, Nippon Steel Co., Ltd. (72) Masami Senba, No. 1 Fujimachi, Hirohata-ku, Himeji-shi, Hyogo Shin-Nihon Steel Co., Ltd. Hirohata Works (72) Inventor Hiroshi Fujiwara 1 Fuji-machi, Hirohata-ku, Himeji-shi, Hyogo Inside the Nippon Steel Co., Ltd. Hirohata Works (72) Inventor Jun-ichi Kameda 1-1-1 Edamitsu, Hachimanto-ku, Kitakyushu, Kitakyushu Nippon Steel Co., Ltd. ) Inventor Kokichiro Inoue Fuku 1-1-1 Edamitsu, Hachimanto-ku, Kitakyushu, Oka Prefecture Inside the Engineering Department, Nippon Steel Corporation (72) Inventor Akira Tanaka, 59 Nitetsu Plant Design Co., Ltd., 46 Nakahara, Tobata-ku, Kitakyushu, Fukuoka (72) ) Inventor Takao Oyama 4-5 Shomon-dori, Hirohata-ku, Himeji-shi, Kamigumi Hirohata Branch, Inc. (72) Inventor Katsumi Miyata 4-5 Shomon-dori, Hirohata-ku, Himeji-shi, Hyogo Kamigumi Hirohata Co., Ltd. Of (56) References Actual Open Sho 63-151488 (JP, U) Actual Open Sho 59-74979 (JP, U)

Claims (1)

(57) [Claims] 1. A frame 1 in which an upper portion of a vertical arm 19 is fixed.
Is provided with a first sling winding drum 5A rotated by a driving device 6A and a second sling winding drum 5B rotated by a driving device 6B. The vertical arm 19 has an upper portion of a lower guide arm 22. It is rotatably attached, and the pressing roller 9 is attached to the lower part of the lower guide arm 22 thereof.
The vertical arm 19 is provided with a turning device that turns the lower guide arm 22 in a direction to move away from the vertical arm 19, and a turning device that turns the lower guide arm 22 in a direction to approach the vertical arm 19. A sling-type lifting device in which the first sling 2 fed from the first sling winding drum 5A is arranged between the pressing roller 9 and the vertical arm 19.