JP3412153B2 - Hoisting equipment - Google Patents

Description

Detailed Description of the Invention

[0001]

The present invention relates to relates to a hoisting apparatus for use in lifting a heavy object in a construction site.

[0002]

2. Description of the Related Art Conventionally, at a construction site of a thermal power plant or the like, a jib crane is generally used for lifting and lowering heavy objects. The jib crane has a main winding wire for hoisting heavy objects. The main winding wire is provided with a hook at its tip for connecting to a heavy load. Further, some jib cranes have auxiliary winding wires. This auxiliary winding wire is used for connecting the tip to the hook of the main winding wire and for fixing the hook to the tip portion of the boom (jib) when the crane is not used.

When assembling a boiler or the like of a thermal power plant with such a jib crane, the jib crane is installed on a steel frame building assembled in a grid shape, and main windings are made between the steel frames assembled in the grid shape of the building (cells). Insert wires and connect heavy items to hooks. Then, the main winding wire is rolled up to lift the heavy object attached to the hook.

[0004]

In the past, there have been the following problems. As described above, when lifting or lowering heavy objects in a steel framed building, since there is no space in the lattice-shaped steel frames and there are places where sheaves cannot be used, the conventional method is to use a single main winding wire to move up and down. It is common to work. Therefore, the lifting load of the crane is
Since the load of the member is directly applied to the main winding wire, it is limited by the allowable load of the main winding wire.

However, at the construction site, when assembling a large structure, it is sometimes desired to lift a heavy object that is heavier than the allowable load of the main winding wire. In such a case, increasing the diameter of the main winding wire may increase the allowable load of the main winding wire. However, increasing the diameter of the main winding wire also increases the drum diameter of the winch that winds the main winding wire. turn into. Therefore, if the diameter of the main winding wire is changed, it is necessary to replace the winch that is currently used. This is not realistic because the cost burden becomes very large because the whole crane needs to be modified.

By the way, the allowable load can be doubled by using a moving pulley to cover two main winding wires. Then, it is conceivable that the main winding wire is looped by supporting the tip end portion of the main winding wire by the auxiliary winding wire described above, and the main winding wire is made into two bars. However, when the allowable load of the main winding wire is 20 tons, the allowable load of the auxiliary winding wire is about 1.5 tons, which is one tenth or less of that of the main winding wire, and cannot support a heavy load. .

[0007] Therefore, conventionally, the main winding wire is permitted by connecting the tip of the main winding wire to a steel frame of a building to form a loop, and attaching a hanging tool to this to substantially hang the main winding wire. A heavy object that is larger than the load is hoisted. However, in such a case, it cannot be applied when lifting a heavy object placed outside the building. Further, even when a heavy object placed inside the building is hoisted, the lifting height can be taken only up to the position where the tip of the main winding wire is connected. Therefore, the height of the jib above the connecting position of the tip of the main winding wire is wasted.

On the other hand, in the conventional hanging device, the pulley around which the wire is wound and the hook for hanging the heavy object are integrated. For this reason, it was necessary to pass the wire through the hanger before looping the wire, which was inconvenient to attach and detach. Further, there has been a demand for retrofitting a suspender to the looped wire.

An object of the present invention, it is possible to increase the lifting weight without changing the main body portion, Oh to provide a hoisting device which can ensure sufficient lift
It

[0010]

In the hoisting device according to the present invention, a load suspending wire for suspending and lifting a heavy object from a main body and a connection detachably coupled to the tip end of the load suspending wire. A member, a connecting wire that is suspended from the main body part and connected to the connecting member, and that raises and lowers the connecting member, and a lock that locks the connecting member that is provided on the main body part and that is hung by the connecting wire. And a part.

In the above structure, the load-hanging wire can be moved integrally with the connecting wire by connecting the connecting member attached to the connecting wire to the tip of the load-hanging wire. Next, the connecting member connected to the load hanging wire is raised by winding the connecting wire. Then, the connecting portion is locked to the locking portion provided on the main body, and the support of the tip end side of the load hanging wire is switched from the connecting wire to the locking portion. As a result, the load-hanging wire can be looped in the main body portion, so that it is possible to hang two pieces of the hanging device, and the allowable load can be doubled. Further, by connecting the distal end portion of the load hanging wire to the main body to form a loop, the lifting height of the load hanging wire can be secured up to the height of the main body.

The locking portion includes a locking pin to be inserted into a pin hole formed in the connecting member, and an actuator for axially moving the locking pin by remote operation to engage and disengage the connecting member. It can be configured to have.

In the above structure, the locking pin of the locking portion can be remotely inserted by the actuator into the pin hole formed in the connecting member. Therefore, the work of locking the connecting member to the locking portion can be performed in the air. Further, the locking portion is formed continuously with the engaging concave portion that engages with the positioning convex portion provided on the side portion of the coupling member, and guides the positioning convex portion to the engaging concave portion. It can be configured to have a guide portion that operates.

In the above structure, when the connecting member is locked to the locking portion, the positioning convex portion can be reliably guided to the engaging concave portion by the guide portion, and the positioning convex portion of the connecting member is engaged to the engaging concave portion. By aligning the pin hole of the connecting member with the engaging pin, the position of the engaging pin can be easily adjusted. Therefore, the locking pin can be reliably inserted into the pin hole .

[0015]

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a side view of a jib crane which is a hoisting device according to this embodiment. 2 and 3 are process explanatory diagrams of the jib crane according to the present embodiment.
FIG. 4 is an explanatory diagram of the plug member in this embodiment.
5 and 6 are explanatory views of the socket member. 7 and 8
3A and 3B are a front view and a side view, respectively, of the suspender in the present embodiment.

In this embodiment, the case where the allowable load of a jib crane used at a construction site of a thermal power plant is increased will be described. In the present embodiment, the allowable load is increased by connecting the tip end of the main winding wire, which is the load suspending wire of the jib crane, to the jib, which is the main body, to form a loop.

As shown in FIG. 1, the jib crane 1 has a base 10 on which a jib 12 forming a main body is pivoted at its base end. A jib pulley 13 is rotatably attached to the tip of the jib 12, and a main winding wire 14 that is a load-hanging wire is wound around the jib pulley 13. The base end side of the main winding wire 14 is wound around a main winding winch 16 installed on the rear side of the jib 12. The tip side of the main winding wire 14 is suspended from the tip of the jib pulley 13. As a result, the main winding wire 14 moves up and down according to the ups and downs of the jib 12. The main winding wire 14 in the present embodiment is assumed to have a hanging load of, for example, about 20 tons.

A main winding hook 28 is provided at the tip of the main winding wire 14. The main winding hook 28 is shown in FIG.
As shown in FIG. 5, it is formed in a tapered rectangular plate shape. By doing so, it is possible to insert between the grid-shaped steel frames in the thermal power plant. Main winding hook 2
The side surface of 8 has a through hole 29. The through hole 2
It is possible to lift the heavy object by connecting the heavy object through a wire not shown in FIG.

The jib 12 has an extension plate 22 protruding from the tip side. The extension plate 22 is
Extension winding pulleys 24 and 26 are rotatably arranged on the upper surface. The auxiliary winding wire 18, which is a connecting wire, is wound around the extension winding pulleys 24 and 26 of the extension plate 22, and the auxiliary winding wire 18 is attached to the extension plate 2.
2 Suspended from the tip side. As a result, the auxiliary winding wire 1
8 can be hung outwardly from the main winding wire 14 by an amount corresponding to the extension plate 22 so that the attachment interval of the suspenders 48 can be secured. Here, as the length of the extension plate 22, a length approximately equal to the diameter of the hanging tool 48 can be preferably used. The base end side of the auxiliary winding wire 18 is wound and unwound by the auxiliary winding winch 20. The auxiliary winding winch 20 is installed on the rear side of the main winding winch 16 on the base 10. In the present embodiment, the auxiliary winding wire 18 is assumed to have a hanging load of, for example, about 1.5 tons.

The auxiliary winding wire 18 is connected at its tip end to the base end of a plug member 30 which is a connecting member. The plug member 30 is a connecting member that is coupled to the main winding hook 28, and the tip end portion of the auxiliary winding wire 18 is inserted into the center of the base end portion. The tip of the auxiliary winding wire 18 is rotatably connected by a thrust bearing 37. Therefore, the plug member 30 can be raised and lowered integrally with the auxiliary winding wire 18. The base end of the plug member 30 has a tapered shape to facilitate the guide to the socket member 32 that locks the plug member 30.

As shown in FIGS. 4 (b) and 4 (c), a locking pin connecting hole 44 for locking with the socket member 32 penetrates through the central portion of the plug member 30. It is provided. The locking pin connection hole 44 has an elongated shape, and facilitates insertion of the plug locking pin 42 that locks to the socket member 32 as described later. Further, projecting plates 40 having a convex cross section are provided on both side surfaces of the locking pin connecting hole 44. The projecting plate 40 is formed in a shape that can be engaged with the engaging groove 38 that is the positioning projection and the engagement recess of the socket member 32 (FIG. 5).
(See (a)).

Further, the tip end of the plug member 30 is formed into a plate material having a U-shaped cross section, and main winding hook connection holes 31 are provided on both side surfaces. The tip end of the plug member 30 can be inserted into the tip side of the main winding hook 28. The through hole 29 of the main winding hook 28 is the main winding hook connecting hole 3
It is possible to align with 1 and to be coupled by a pin, which enables integration with the main winding hook 28.

Next, the socket member 32 will be described. The socket member 32 is a locking portion that locks and holds the plug member 30. As shown in FIG. 5, the socket member 32 has both ends of the upper surface of the frame 70 connected to the lower ends of two load receiving wires 34, and is suspended and supported by the load receiving wires 34. The upper end of the load receiving wire 34 is the extension plate 2
The load received by the load receiving wire 34 is connected to both sides of the wire 2 and is transmitted to the jib 12 via the extension plate 22.
Therefore, the socket member 32 is supported by the jib 12. In the present embodiment, the load receiving wire 34
Uses one having a suspension load of 10 tons per one. As a result, a lifting load equal to or higher than that of the main winding wire 14 can be secured. It should be noted that the load receiving wire 34 may have any arrangement as long as it can ensure a suspension load equal to or higher than that of the main winding wire 14 as a whole.

The socket member 32 corresponds to the frame 7
A cylindrical socket body 72 is provided at the center of 0.
The socket body 72 allows the plug member 30 to be inserted therein. In addition, the frame 70 has a cover 7 above the socket body 72 via a bracket 74.
6 is attached. The shaft center of the cover 76 has a plug insertion hole 36 so that the base end portion of the plug member 30 can be inserted.

A plug limit switch 47 is arranged on the upper surface of the cover 76. The plug limit switch 47 detects that the plug member 30 has been inserted to a predetermined position of the socket member 32.

The frame 70 has a socket body 72.
On one side, a plug locking pin 42 is provided so as to be orthogonal to the socket body 72 and movable in the axial direction. Socket body 7
2 has a locking pin insertion hole 78 through which the plug locking pin 42 passes. Further, the frame 70 is provided with a locking pin limit switch 45 on the other side of the socket main body 72, with which the tip of the plug locking pin 42 penetrating the socket main body 72 comes into contact.

The socket body 72 has a locking pin insertion hole 7
The engaging groove 38 is provided in a direction orthogonal to the direction in which the 8 is provided. The socket body 72 is provided on the lower side of the engagement groove 38,
A guide guide 39 connected to the engagement groove 38 and expanded downward
have. The guide guide (guide portion) 39 guides the projecting plate 40 of the plug member 30 into the engagement groove 38. As a result, the projecting plate 40 of the plug member 30 is smoothly inserted along the engagement groove 38. Therefore, the locking pin insertion hole 78 of the socket member 32 and the locking pin connecting hole 44 of the plug member 30 can be aligned with each other, and the plug locking pin 42 can be reliably inserted into the holes 44 and 78. Therefore, the plug member 30 can be reliably inserted even in the air.

As shown in FIG. 6, the plug locking pin 42 is connected to an electric cylinder 46, and the plug locking pin 42 is controlled to move in and out by operating the electric cylinder 46. The electric cylinder 46 is the drive motor 4
9 drives the piston rod 51 to move in and out. As a result, the connecting shaft 5 is connected to the piston rod 51.
Thus, the plug locking pin 42 connected by 3 is moved in the axial direction. When the plug locking pin 42 moves in the axial direction and penetrates the plug member 30 and the plug locking pin 42 comes into contact with the locking pin limit switch 45, the completion of insertion is detected.

Thus, the main winding wire 14 can be looped by connecting the plug member 30 with the socket member 32. The looped main winding wire 14
A suspending device 48 is attached to the above, thereby doubling the allowable load.

As shown in FIGS. 7 and 8, the suspender 48 comprises a sheave portion 80 and a hook portion 82.
The sheave portion 80 is rotatably attached via a pulley center shaft 52 to a substantially home-base shaped bracket 54 on which the main winding pulley 50 is arranged on both sides thereof. On the outside of the bracket 54, a link plate 56 pivotally attached to the pulley center shaft 52 is arranged. The bracket 54 and the link plate 56 are open at the bottom so that the looped main winding wire 14 can be wound around the main winding pulley 50. An attachment / detachment hole 84 is provided in the lower portion of the link plate 56, and the hook connection plate 62 of the hook portion 82 can be detachably and swingably connected by the link attachment / detachment pin 58 via the attachment / detachment hole 84.

The suspender 48 has a sheave portion 80 and a hook portion 82 which are separated when not in use. The sheave portion 80 separated from the hook portion 82 is supported by the hanger support 64. The cradle 64 has a base frame 8 on which the hook portion 82 is arranged.
6 and a pair of support legs 88 provided upright on the base frame 86. A support plate 90 is provided above each leg 88,
Support pins 66 are provided on the support plate 90 so as to project therefrom. The pulley 50 is supported by the support pin 92 by inserting the support pin 66 into the support hole 94. A presser cap 96 is detachably attached to the tip of the support pin 66 to prevent the pulley 50 from falling off.

The hook portion 82 has a hook 60 and a hook connecting plate 62, both of which are pivotally attached via a trunnion 63. The hook 60 is in the shape of an anchor having a pair of hook portions 92 for hooking a wire slung over a heavy object. The base frame 86 is provided with a trunnion receiver 100 and a hook receiver 65 so as to support the trunnion 63 and the hook portion 92 of the hook portion 82 separated from the sheave portion 80.

The operation of the present embodiment described above is as follows. When lifting a heavy object within the allowable load of the main winding wire 14, as shown in FIG. 2A, the heavy object is connected to the main winding hook 28 provided at the tip of the main winding wire 14, The hoisting work is performed by the main winding wire 14. As described above, since the main winding hook 28 has a long and thin shape, it can be easily moved up and down even in a building with a lattice-shaped steel frame.

In the case of lifting a heavy object that exceeds the allowable load of the main winding wire 14, the procedure is as follows. First, FIG.
As shown in (b), the main winding hook 28 is lowered to the work place.
Then, as shown in FIG. 2C, the auxiliary winding wire 18 is lowered to lower the plug member 30 to the work place. Then, the leading end of the main winding hook 28 and the leading end of the plug member 30 are connected by a pin to integrate them. Therefore, FIG. 3 (a)
The auxiliary winding wire 18 is wound up to the tip side of the jib 12 as shown in FIG. As a result, the main winding wire 14 connected to the auxiliary winding wire 18 is wound up from the tip side of the main winding wire 14.

As described above, the socket member 30 is provided on the tip side of the jib 12, and the auxiliary winding wire 18 penetrates the socket member 30. Therefore, the auxiliary winding wire 18
The plug member 30 provided at the tip end of the plug member has a plug insertion hole 36 of the socket member 32 when the auxiliary winding wire 18 is wound up.
Will be guided to. The plug member 32 is guided by the guide portion 39 of the socket member 32, and the projecting plate 40 of the plug member 30 is engaged with the engaging groove 38 of the socket member 32.
Is inserted while being engaged with. When the upper end (base end) of the plug member 30 comes into contact with the plug limit switch 47 protruding from the cover 76, the auxiliary winding winch 20 is stopped. Thereby, the locking pin connecting hole 44 of the plug member 30
The position can be automatically aligned with the pin insertion hole 78 of the socket member 32 as shown in FIG. 5B.

Then, the remote control unit (not shown) is operated to operate the electric cylinder 46. The electric cylinder 46 causes the plug locking pin 42 to move into the locking pin connecting hole 44.
You will be guided in the inside. When the plug locking pin 42 contacts the locking pin limit switch 45, the electric cylinder 4
The operation of 6 is stopped and the movement of the plug locking pin 42 is stopped. Therefore, the plug member 30 is replaced with the socket member 32.
Can be locked to. Thereby, the main winding wire 1
4 is looped.

Then, by loosening the auxiliary winding wire 18, the support of the main winding wire 14 is switched from the auxiliary winding wire 18 to the socket member 32. Since the socket member 32 is supported by the jib 12, the tip end side of the main winding wire 14 can be supported by the jib 12. Therefore,
The allowable load can be increased without changing the drum diameter of the main winding winch 16 from the conventional one. After that, FIG. 3 (c)
As shown in FIG. 5, the suspending device 48 is attached to the looped main winding wire 14. The hanging device 48 is supported by a hanging device support 64. First, the main winding wire 14 is wound around the main winding pulley 50 of the sheave portion 80.

Next, the hook connecting plate 62 of the hook portion 82 arranged on the base frame 86 is raised and connected by the pin 58. When the main winding wire 14 is wound up, as shown on the left side of FIG. 7, the hook portion 82 is hung on the sheave portion 80. As a result, the main winding wire 14 is attached to the suspension 4
It becomes a state that it is hung on 8 and the allowable load is doubled. As described above, since the main winding wire is connected to the jib to form a loop, the lifting work can be performed while ensuring the lifting height to the original height of the jib.

Further, since the load applied to the winch drum of the jib crane is the same as the conventional one, the allowable load can be doubled without changing the main body. Also, by providing the plug member with the locking portion on the socket member,
Since the plug member can be smoothly inserted into the socket member, the main winding wire can be smoothly connected to the jib in the air away from the ground.

In the hanging device of this embodiment, the hook portion can be removed to open the pulley, so that the hanging device can be easily attached even after the main winding wire is looped. Note that the present invention can be particularly preferably used in a steel frame building such as a thermal power plant, but the application target is not limited to this, and is preferably used when increasing the allowable load in a place where horizontal movement of the main body is difficult. be able to. Further, in the embodiment, the socket member is configured to be hung from the tip end side of the jib, but it may be integrated with the jib. Further, in the embodiment, the main winding wire loop is formed on the outer side of the jib, but the present invention is not limited to this, and the main winding wire loop may be formed on the inner side or the horizontal side of the jib. In the embodiment, the main winding wire is looped using the connecting auxiliary winding wire, but the main winding wire may be looped using a new member. further,
The hoisting device is not limited to a jib crane, but a tower crane, a laphthalene crane, or the like may be used.

[0042]

According to the present invention, since the load-hanging wire is looped and connected to the main body, the lifting height can be secured up to the original height of the load, and since the two load-hanging wires are removed, the main body can be secured. Lifting weight can be increased without changing parts.

[Brief description of drawings]

FIG. 1 is a side view of a jib crane according to an embodiment of the present invention.

FIG. 2 is a process explanatory diagram of the jib crane according to the embodiment of the present invention.

FIG. 3 is a process explanatory diagram of the jib crane according to the embodiment of the present invention.

FIG. 4 is an explanatory diagram of a plug member according to the embodiment of the present invention.

FIG. 5 is a sectional front view and a side view of the socket member according to the embodiment of the present invention.

FIG. 6 is a cross-sectional plan view of the socket member according to the embodiment of the present invention.

FIG. 7 is a front view of the suspender according to the embodiment of the present invention.

FIG. 8 is a front view of the suspender according to the embodiment of the present invention.

[Explanation of symbols]

1 jib crane 10 base 12 jib 13 jib pulley 14 Main winding wire 16 Main winch 18 auxiliary winding wire 20 auxiliary winding winch 22 Extension plate 24 Extension winding pulley 26 Extension winding pulley 28 Main winding hook 30 plug members 32 Socket member 34 Load receiving wire 36 Plug insertion hole 37 Thrust bearing 38 Engagement groove 39 Guide part 40 Overhang plate 42 Plug locking pin 44 Lock pin connection hole 45 Locking pin limit switch 46 electric cylinder 47 plug limit switch 48 hanging equipment 49 drive motor 50 Main winding pulley 51 piston rod 52 Pulley center axis 53 Connection shaft 54 bracket 56 link plate 58 Link removable pin 60 hooks 62 Hook connection plate 63 trunnion 64 Hanging support 65 hook receiver 66 Support pin 70 frames 72 Socket body 74 bracket 76 cover 78 pin insertion hole 80 sheave part 82 Hook part 84 Desorption hole 86 base frame 88 support legs 90 Support plate 92 Locking part 94 Support hole 96 Presser cap 100 trunnion receiver

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Claims (3)

(57) [Claims] 1. A load-hanging wire which is hung from a main body to lift and lower a heavy object, a connecting member which is detachably connected to a tip end of the load-hanging wire, and the connection which is hung from the main body. Coupled to a member,
A hoisting device, comprising: a connecting wire that raises and lowers the connecting member; and a locking portion that is provided in the main body and that locks the connecting member that is hung by the connecting wire. 2. The locking portion includes a locking pin that is inserted into a pin hole formed in the connecting member, and an actuator that axially moves the locking pin by remote control to engage and disengage the connecting member. The hoisting device according to claim 1, further comprising: 3. The engaging portion is formed continuously with the engaging concave portion that engages with the positioning convex portion provided on the side portion of the connecting member, and engages the positioning convex portion. The hoisting device according to claim 2, further comprising a guide portion that guides the concave portion.