JP2819990B2 - Hoist type tower crane - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for unloading a tower under construction by a tower adjacent to the building under construction.
The present invention relates to a hoist-type tower crane that unloads by hoisting a load by circulating a trolley hoist provided on a trolley that travels along rails.

[0002]

2. Description of the Related Art Unloading of a building under construction is generally performed by a tower crane (for example, see Japanese Unexamined Patent Publication No. 53-31).
5493). Such a tower crane has one wire for lifting and one hanging hook per tower crane.
It is a set. Even when a plurality of sets are provided, only one set is used at a time. For this reason, a series of operations such as slinging, unloading, unloading the cargo, and returning to the loading area could not proceed to the next operation until the previous operation was completed. That is, for example, while the previous load is being placed in the storage area, the work cannot be performed in parallel, such as unloading the next load, and the work is inefficient.

On the other hand, a method using a trolley hoist has been proposed for performing a plurality of unloading operations in parallel (Japanese Patent Application Laid-Open No. H4-155062). In this trolley hoist, a hoist for winding up a load is provided on a trolley that runs by itself along a rail. The rail on which the trolley hoist runs is divided into a movable rail and a fixed rail of the same cross section.The movable rail with the trolley hung is temporarily connected to the end of the fixed rail to connect the trolley. By transferring to a fixed rail, it is possible to travel on different rails one after another and carry a load.

[0004]

However, if the trolley hoist is to be used for the tower crane as it is, the trolley hoist unloads a long rope from the horizontal jib height of the tower crane to the ground surface far below. Must be lifted. For this reason, it is necessary to equip the trolley hoist with a long rope, and the load of one trolley hoist becomes excessive.

The present invention has been made in order to solve the above problems, and a series of operations including unloading with a plurality of trolley hoists using a trolley hoist in a tower crane, horizontal transfer and unloading of a splicer. In parallel,
It is another object of the present invention to provide a hoist type tower crane capable of reducing the weight of one trolley hoist.

[0006]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a plurality of trolley hoists provided on a trolley which self-propells a load hoist along a rail, and one trolley hoist. A short hoist rail for connection that can run by itself, a tower next to the building under construction, a winch provided at the top of the tower and suspending the hoist rail, and a trolley hoist of the suspended hoist rail A horizontal jib having a relay horizontal transport device that moves a plurality of rings on a ring-shaped track, and a horizontal hoist in which the moved hoist rail is connected to one end and the other end is located at a loading place and the whole rotates in a substantially horizontal plane. , Is provided.

In addition, the relay horizontal conveying device may include a plurality of horizontal moving devices for re-clamping the hoist rail lifted by the winch and moving the hoist rail on a ring-shaped track, or may be provided with a plurality of horizontal moving devices. Alternatively, a trolley hoist may be transferred from the hoist rail, and a hoist rail dedicated to an intermediate horizontal transport that runs on a ring-shaped track may be provided.

Further, the ring-shaped track is preferably a ring girder type double rail, and the horizontal moving device is preferably a crane girder.

[0009]

The load is hoisted by the hoist at the loading area, and the trolley provided with the hoist runs along the rail of the portal crane or the overhead crane. A portal crane or overhead crane travels on the ground loading dock. A hoist rail is connected to an end of the rail at a set position after traveling. The trolley hoist transfers from the rail to this hoist rail. The hoist rail is lifted by a winch provided at the top of the tower. The lifted hoist rail is re-clamped by the crane girder.
A plurality of the crane girder move on a ring-shaped orbit.

[0010] Alternatively, the trolley hoist transfers from the hoist rail suspended to another hoist rail. A plurality of such other hoist rails move on a ring-shaped orbit.

The hoist rail having moved on the ring-shaped track in this way is connected to one end of a horizontal rail of a horizontal jib. The other end of the horizontal rail is located at the loading area. The entire horizontal jib pivots in a substantially horizontal plane, so that any location of the building under construction can be used as a depot.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to FIGS. A portal crane 3 is provided in the loading place 1 on the ground so that it can travel. This run is performed on two rails 5
Done on On the upper part of the portal crane 3, a rail 7 having an I-shaped cross section is provided. A plurality (three in the figure) of trolley hoists 9 capable of self-propelling along the rails are provided. In the trolley hoist 9, a hoist 13 capable of hoisting a load 11 is provided on a self-propelled trolley 15. The rail 7 has a double track at the center of the portal crane 3 so that a plurality of trolley hoists can travel in the opposite direction by themselves. A hoist rail 17 to be described later can be connected to an end of the rail 7. That is, a guide mechanism and a lock mechanism (not shown) for connection are provided.

The hoist rail 17 has the same I-shaped cross section as that of the rail 7 and is a short connecting rail on which one trolley hoist 9 can run by itself. And crane girder 21
Auto-clamp mechanisms 23 and 25 for performing the clamping according to FIG. 2 are provided.

A tower 29 is provided next to the building under construction 27 (FIG. 1) that requires unloading. This tower 29
A ring girder type double rail device 31 is provided at the upper part of the device. This ring girder type double rail device 3
1 has two parallel tracks 33 (FIG. 2) in the form of a ring. A plurality of crane girders 21 are provided on the track 33. These crane girders 21
Self-run on 3

A winch stage 35 is provided at one location on the track 33 so as to straddle it. The winch stage 35 is provided with two winches 19, and the hoist rail 17 can be lifted and lowered by being clamped by the automatic clamp mechanism 23.
The winch stage 35 has a U-shape straddling the two tracks 33, and both ends of the U-shape are further bent so as to wrap the track 33. The crane girder 21 can pass through the substantially U-shaped opening. Then, at the position where the crane girder 21 just passes through the winch stage 35, the hoist rail 17 lifted is located immediately below the crane girder 21. At this position, the crane girder 21 can automatically clamp the hoist rail 17 by the auto clamp mechanism 24 of the hoist rail 17.

A horizontal jib 37 is provided on a part of the ring-shaped track 33 of the ring girder type double rail device 31 on the building 27 (FIG. 2) side. This horizontal jib 3
Numeral 7 is supported by a structure (not shown), one end of which faces the ring-shaped track 33, and is rotatable in an arc in accordance with the arc of the track 33. Further, the other end of the horizontal jib 37 can be located at an arbitrary loading place of the building 27. A horizontal rail 39 is provided below the horizontal jib 37. One end of the horizontal rail 39 is provided with a guide mechanism and a lock mechanism (not shown) for connecting to the hoist rail 17 moving on the track.

The operation of this embodiment will be described below.
Loads of materials and the like that have been transported to the construction site are temporarily stored in a loading dock 1. The portal crane 3 travels on the two rails 5 toward the temporary storage location. Further, the trolley hoist 9 runs along the rail 7 above the portal crane. When the trolley hoist 9 comes above the temporary storage of the load, the hoist 13 lowers the rope and slings the load.

The slewing is performed by a hanger provided below the trolley hoist 9. Then, the rope is hoisted, and the trolley hoist 9 runs by itself along the rail 7.
This self-running is performed toward the end of the rail 7.

The portal crane 3 travels to a predetermined location right beside the tower 29. And winch 1 from above
9, the hoist rail 17 clamped via the auto clamp mechanism 23 is suspended. Eventually, the hoist rail 17 is connected to the end of the rail 7.
The trolley hoist 9 that runs on the rail 7 of the portal crane 3 moves toward the connected hoist rail 17.
After the transfer, the winch 19 is moved to the hoist rail 17 again.
Hoist.

When the lifted hoist rail 17 comes directly below the winch stage 35, the crane girder 21 moves on the track 33 and comes right above the hoist rail 17. Then, the hoist rail 17 is automatically clamped by the auto clamp mechanism 25. Auto clamp mechanism 2
3 is unclamped.

Thereafter, the crane girder 21 further moves on the track 33 in the same direction, and moves on the base extension line of the horizontal jib 37 on the substantially opposite side. The moved hoist rail 17 is connected to one end of the horizontal rail 39 of the horizontal jib 37.

After this connection, the trolley hoist 9 moves from the hoist rail 17 to the horizontal rail 39. The trolley hoist 9 arriving at the required position of the horizontal rail 39 hangs down the rope of the hoist 13 and places the load on the loading place 41. Then, the sling is removed, the hoist 13 winds up the rope, and the trolley hoist 9 runs on the horizontal rail 39 to one end. Then, the user transfers to the connected hoist rail 17.

The hoist rail 17 is a ring girder 2
While being clamped at 1, the vehicle further proceeds in the same direction on the ring-shaped orbit 33 and returns to the position immediately below the winch stage again. or,
The plurality of trolley hoists 9 are the rails 7 of the portal crane 3
Unloading work can be performed in parallel. Since a plurality of unloading operations can be performed in parallel, the efficiency of the unloading operation can be improved.

Also, from the upper part of the tower 29, a loading place 1 on the ground
Can be mounted on a winch 19 that specializes in lifting and suspending loads. Therefore, since it is not necessary to equip each trolley hoist 9 with such a long rope, the weight of the trolley hoist 9 can be made appropriate. For this reason, in order to maintain the strength of the members of the hoist type tower crane of this embodiment having a plurality of trolley hoists 9, the members do not need to be too large.

In the above embodiment, a plurality of hoist rails 1
Each of the rails 7 reciprocates from the ground to the other end of the horizontal jib 37. However, as in the second embodiment shown in FIGS. 3 and 4, a plurality of hoist rails 17 are dedicated to unloading and unloading. It can be divided into ones that are used exclusively for horizontal transfer. That is, the hoist rail 17 </ b> A dedicated for unloading and unloading reciprocates between the ground and the winch 19. The hoist rail 17B dedicated to the horizontal transfer is a winch 19 and a horizontal jib 3
7 always moves in the same direction on the ring-shaped orbit 33.

That is, the winch stage 35 provided with the two winches 19 has a cantilever shape, and the tip of the winch stage 35 projects outward from the ring-shaped orbit 33. The hoist rail 17A thus lifted has a position structure that can be connected to another hoist rail 17B that has moved on the track 33.
Each hoist rail 17B on the track 33 is provided with a guide mechanism and a lock mechanism for this connection.

In the present embodiment, the trolley hoist 9 transfers from the hoist rail 17A dedicated to unloading and unloading to the hoist rail 17B dedicated to the relay transportation. There are a plurality of hoist rails 17B dedicated to the relay horizontal transport, each of which moves on the ring-shaped track 33 in the same direction. And the trajectory 3 on which the trolley hoist 9 moved
The hoist rail 17B on 3 is connected to the other end of the horizontal rail 39 of the horizontal jib 37. And trolley hoist 9
Transfers from the hoist rail 17B to the horizontal rail 39 and self-propelled to one end of the horizontal rail 39 to place the load.

Thereafter, the trolley hoist 9 moves from the horizontal rail 39 to the hoist rail 17B, moves on the track 33, and moves to the hoist rail 17A dedicated for unloading and unloading, in exactly the reverse order.

In this manner, the plurality of hoist rails 17
The hoist rails 1 dedicated to unloading and unloading are divided into ones dedicated to unloading and
7A only needs to perform the raising / lowering operation, and the hoist rail 17B dedicated to the relay horizontal transportation only needs to perform the operation of moving on the track 33 in a ring shape. Therefore, control of each hoist rail becomes easy.

In the above-described embodiment, it has been described that the loading dock 1 is provided with the portal crane 3.
In another embodiment, a building may be provided at the loading dock 1, and an overhead crane may be provided inside the building.
At the end of the overhead crane, an opening is provided in the side wall of the building to expose the end, and a suspended hoist rail 17 is connected to this exposed portion.

Further, the track of the relay horizontal conveying device is not limited to a double rail, but may be a monorail, and its planar arrangement may not be circular.

[0032]

As described above, according to the hoist type tower crane of the present invention, it is not the trolley hoist that lifts the load from the loading place on the ground to the upper part of the tower. It is performed by a winch provided exclusively for lowering. Accordingly, each of the plurality of trolley hoists does not require long ropes, and is prevented from becoming excessive due to the important ropes of the trolley hoist.

Since a plurality of trolley hoists move on the ring-shaped track of the relay horizontal transport device, the unloading operation can be performed in parallel by the plurality of trolley hoists, and the unloading operation can be performed efficiently. it can.

[Brief description of the drawings]

FIG. 1 is a schematic overall perspective view showing a first embodiment of the present invention.

FIG. 2 is an enlarged perspective view of a portion II in FIG.

FIG. 3 is an overall schematic perspective view showing a second embodiment of the present invention.

FIG. 4 is an enlarged perspective view of a portion IV in FIG. 3;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Loading place 3 Portal crane 5 Rail 7 Rail 9 Trolley hoist 11 Load 13 Hoist 15 Trolley 17 Hoist rail 19 Winch 21 Crane girder 23, 25 Auto clamp mechanism 27 Building 29 Tower 31 Ring girder type double rail device 33 Track 35 Winch stage 37 horizontal jib 39 horizontal rail 41 loading place

Claims (5)

(57) [Claims] 1. A plurality of trolley hoists provided on a trolley for self-propelling a hoist for lifting a load along a rail;
A short hoist rail for connection in which one trolley hoist can move on its own, a tower adjacent to the building under construction, a winch provided at the top of the tower and suspending the hoist rail, and a suspended hoist A relay horizontal transportation device that moves a plurality of rail trolley hoists on a ring-shaped track, and a horizontal rail in which the moved hoist rail is connected to one end and the other end is located at a loading place and the whole rotates in a substantially horizontal plane A hoist-type tower crane comprising: 2. The apparatus according to claim 1, wherein the relay horizontal transport device includes a plurality of horizontal moving devices for re-clamping the hoist rail lifted by the winch and moving the hoist rail on a ring-shaped track. The hoist-type tower crane according to 1. 3. The relay horizontal transport device according to claim 1, further comprising a hoist rail dedicated to the relay horizontal transport that transfers a trolley hoist from the hoist rail lifted by the winch and travels on a ring-shaped track. Item 2. A hoist type tower crane according to Item 1. 4. The hoist type tower crane according to claim 1, wherein the ring-shaped track is a ring girder type double rail. 5. The hoist type tower crane according to claim 2, wherein the horizontal moving device is a crane girder.