JPH1111857A - Overhead traveling crane - Google Patents

Abstract

(57) [Summary] [Object] To provide an overhead traveling crane that can reduce the overhead height of an underground space for constructing underground structures by shortening the height dimension of the overhead traveling crane. The supporting shafts of the hoisting drum and the head sheave are substantially at the same level as the upper surface of the frame of the trolley.
, And approximately half of the hoisting drum 5 and the head sheave 7 are sunk in the frame 21 of the trolley 2, and a part of the gear box 3 containing the speed reducer for the hoisting drum is placed in the frame 21 of the trolley 2. Sink.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an overhead traveling crane and, more particularly, to a ceiling overhead of an underground space for constructing underground structures such as a pumped-storage power station and a hydroelectric power station installed underground. It relates to an overhead crane.

[0002]

2. Description of the Related Art In an overhead crane for carrying heavy loads, a wire rope is laid between a hoisting drum and a head sheave provided on a trolley and a sheave provided on a hook block. The lifting and lowering of the hook block is carried out by rotating and driving the heavy object suspended directly on the hook of the hook block or via the hanging beam, and the heavy object is conveyed to a predetermined position by moving the trolley or girder. Like that.

By the way, a pumped storage power plant installed underground,
In underground structures such as hydroelectric power plants, overhead cranes used for installation, maintenance, and inspection of extremely heavy power generation facilities are permanently installed.

[0004]

It is necessary to use a large-sized crane corresponding to an extremely heavy power generating equipment, etc., so that the overhead crane must be installed above the power generating equipment. It is necessary to form a large space for installing and operating an overhead crane, which inevitably increases the ceiling height of the underground space for constructing the underground structure, and significantly increases the cost of constructing the underground structure There was a problem of rising.

SUMMARY OF THE INVENTION In view of the above problems, the present invention makes it possible to reduce the height of the overhead crane, especially the height of the underground space for constructing underground structures, by reducing the height of the overhead crane. It is intended to provide an overhead crane.

[0006]

In order to achieve the above object, an overhead crane of the present invention supports a hoisting drum and a support shaft of a head sheave at substantially the same level as the upper surface of a trolley frame traversing a girder. Thus, approximately half of the hoisting drum and the head sheave are settled in the frame of the trolley.

In this overhead crane, the supporting shafts of the hoisting drum and the head sheave are supported at substantially the same level as the upper surface of the trolley frame, and approximately half of the hoisting drum and the head sheave are sunk in the trolley frame, thereby improving the durability. The height of the trolley can be set low without lowering the load, thereby reducing the space required for installing and operating the overhead crane.

In order to achieve the same object, an overhead crane according to the present invention is characterized in that a part of a gear box containing a reduction device for a hoisting drum is sunk in a frame of a trolley.

[0009] In this overhead crane, the height of the trolley can be set low without lowering the load-bearing capacity by lowering part of the gear box in the frame of the trolley. The space required for operation can be reduced.

The hoist drum and the head sheave can be supported by separate support shafts, and the support shaft of the head sheave can be supported by a support frame installed in the trolley frame.

As a result, the degree of freedom of the arrangement position of the winding drum and the head sheave in the trolley is increased, and even if a large load is applied to the head sheave, the head sheave can be safely supported and the trolley can be easily balanced in structure. The trolley can be miniaturized.

Further, the winding drum and the head sheave can be supported by a common support shaft.

Thus, the support mechanism of the support shaft can be simplified.

In order to achieve the same object, the overhead crane of the present invention has a sheave shaft installed on both sides of a hook body of a hook block disposed on a trolley, and the sheave shaft is supported by the sheave shaft. It is characterized by.

In this overhead crane, the sheave shafts are installed in both directions on the side of the hook body of the hook block, so that the dimension of the hook block in the height direction can be reduced without lowering the load resistance. Thereby, the space required for installing and operating the overhead crane can be reduced.

Also, a plurality of sheaves can be supported on each sheave shaft, and the sheave located on the hook body side can be formed to have a larger diameter than the other sheaves.

[0017] Thereby, the horizontal stability of the hook block can be improved, and the wire rope extending between the hoist drum and the head sheave provided on the trolley and the sheave provided on the hook block can be interposed. Interference can be prevented.

Further, the two sets of girder can be arranged facing each other, and the position of the lower surface of the inner girder member of each girder can be set to be higher than the position of the lower surface of the outer girder member.

This makes it possible to increase the lifting height of the suspension beam suspended on the hooks of the trolley hook block traversing the two sets of girders, which is necessary for installing and operating the overhead crane. Space can be made smaller.

Further, the electric components can be concentrated and stored in the outer girder member.

Thus, the height of the inner girder member can be kept low.

[0022]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of an overhead crane according to the present invention will be described below with reference to the drawings.

FIGS. 1 to 6 show a first embodiment of an overhead crane according to the present invention. This overhead crane is mainly used in conjunction with underground structures such as pumped-storage power plants and hydroelectric power plants installed underground, and is used for installation, maintenance, and inspection of power generation facilities. A hoist drum 5, a head sheave 7 and an equalizer sheave 8 are arranged on a trolley 2 traversing the girder 1, and the sheave is arranged on a hook block 9 with these. The hook block 9 is moved up and down by rotating the hoisting drum 5 with the drive motor 4 between the wire rope W and the hook 94, and directly or via the suspension beam 11. In addition to lifting and lowering the suspended heavy object, the trolley 2 and the girder 1 are moved to convey the heavy object to a predetermined position. .

The trolley 2 has a frame 21 having a substantially cross-girder shape.
And the hoisting drum 5, the head sheave 7, and the equalizer sheave 8 are substantially at the same level as the upper surface of the frame 21.
, Approximately half of the hoisting drum 5, the head sheave 7, and the equalizer sheave 8 are sunk in the frame 21 of the trolley 2. The gear box 3 accommodating the reduction gear for the hoisting drum
Is settled in the frame 21 of the trolley 2.

The hoisting drum 5 and the head sheave 7 are
The support shaft 51 of the hoisting drum 5 is supported on the frame 21 of the trolley 2 via the bearing 6 while being supported by separate support shafts 51 and 71 (one end of the support shaft 51 is connected to the trolley 2). Gear box 3 housing a reduction device for a hoist drum constituting a part of frame 2
To support. On the other hand, the support shaft 71 of the head sheave 7 is supported by the support frame 23 provided on the beam 22 that extends across the frame 21 of the trolley 2. The support frame 23 also supports the support shaft of the equalizer sheave 8. As described above, the hoisting drum 5 and the head sheave 7 are supported by the separate support shafts 51 and 71, respectively, and the support shaft 71 of the head sheave 7 is supported by the support frame 23 installed in the frame 21 of the trolley 2. The winding drum 5 and the head sheave 7 have a greater degree of freedom in the arrangement position in the trolley 2, and can be safely supported even when a large load is applied to the head sheave 7. The trolley 2 can be miniaturized.

Here, the hoisting drum 5 is divided right and left from the center so that the two wires W can be wound or unwound simultaneously. Similarly, the head sheave 7 is configured such that the two wires W can be wound around the sheave 24 of the hook block 9 a plurality of times.

The trolley 2 of this overhead crane includes:
The sub-hook block 90 is provided so that a lightly conveyed object can be conveyed to a predetermined position.
The auxiliary hoisting drum 50 and the like are arranged on the trolley 2, and a wire rope W is laid between the auxiliary hoisting drum 90 and a sheave arranged on the auxiliary hook block 90, and the auxiliary hoisting drum 50 is
0, the auxiliary hook block 9 is rotated.
0 is moved up and down, the conveyed object directly hung on the hook of the sub hook block 90 is raised and lowered, and the trolley 2 and the girder 1 are moved to convey a heavy object to a predetermined position. By supporting the support shaft of the upper drum 50 at substantially the same level as the upper surface of the frame 21, approximately half of the auxiliary winding drum 50 is
1 and a part of the sub gear box 30 accommodating the sub hoisting drum speed reducer is also submerged in the frame 21 of the trolley 2.

In the present embodiment, the hoisting drum 5 and the head sheave 7 are provided with separate support shafts 51, respectively.
However, as in the second embodiment of the overhead crane of the present invention shown in FIG.
Also, the head sheave 7 can be configured to be supported by a common support shaft, whereby the support mechanism of the support shaft including the bearing 6 can be simplified. In addition, in the overhead crane of the second embodiment, similarly to the overhead crane of the first embodiment, the supporting shafts of the hoisting drum 5 and the head sheave 7 are supported at substantially the same level as the upper surface of the frame 21 so that the winding crane is supported. Approximately half of the upper drum 5 and the head sheave 7 are settled in the frame 21 of the trolley 2, and at the same time, a part of the gear box 3 containing the reduction device for the hoisting drum is placed in the frame 21 of the trolley 2. The trolley 2 is constructed so that the gearbox 3 forms a part of the frame 21 of the trolley 2.

The drive motor 4 and the sub drive motor 4 are provided on the side surfaces of the frame of the gear box 3 and the sub gear box 30.
0 is directly attached, that is, attached by flange connection, and connected to the input shaft of the speed reducer, and the output shaft of the speed reducer is connected to the support shaft of the hoisting drum 5 or the auxiliary hoisting drum 50, respectively. To do.

As described above, the support shafts 51 and 52 of the hoisting drum 5 and the head sheave 7 are supported at substantially the same level as the upper surface of the frame 21 of the trolley 2, and approximately half of the hoisting drum 5 and the head sheave 7 2 and a part of the gear box 3 accommodating the hoist drum reduction gear is submerged in the frame 21 of the trolley 2 without lowering the load resistance.
As shown in FIG. 7C, the height BS of the trolley 2 (FIG. 7C)
The right figure) is changed to the height BL of the conventional trolley 2 (FIG. 7 (c)).
In comparison with (see the left figure), it can be set lower, thereby reducing the space required for installing and operating the overhead crane.

When a heavy object is lifted by an overhead crane, two overhead cranes are generally used to suspend a heavy object via a hanging beam. In the overhead crane according to the present invention, the overhead crane is shown in FIG. As described above, two overhead cranes (two sets of girder) 1A, 1B are arranged to face each other, and the respective overhead cranes 1A, 1B
Is set so that the position of the lower surface of the inner girder member 10B is higher than the position of the lower surface of the outer girder member 10A. Thereby, two overhead cranes 1A, 1B
When the suspension beam 11 suspended by the hook 91a of the hook block 9 of the trolley 2 traversing the girder is lifted, the inner girder member 10B does not become an obstacle, and therefore the lifting height of the suspension beam 11 is increased. The space required to install and operate the overhead crane can be reduced.

In this case, in order to keep the height of the inner girder member 1B low, electric components such as a power supply cable and a control cable necessary for driving the overhead cranes 1A and 1B are provided in the outer girder member 1A. It is desirable to store them in a concentrated manner.

As shown in FIGS. 5 and 6, the hook block 9 has a hook body 91 having a required size and shape.
A trunnion 92 provided on the outer periphery of the upper portion of the hook main body 91 to rotatably support the hook main body 91; a girder-shaped frame 95 to which the trunnion 92 is attached; and a lateral position of the hook main body 91; It is composed of two sheave shafts 93 that are installed between the trunnion 92 and the frame 95 so as to be positioned on a straight line, and a plurality of sheaves 94 that are rotatably supported by the respective sheave shafts 93. I have.

The hook body 91 has a hook 91 for hooking a wire rope or the like for holding a heavy object at a lower portion thereof.
a is integrally formed on both sides or one side, a bar is formed above the middle part of the hook main body 91, and a trunnion 92 is disposed on the outer periphery thereof. By interposing a thrust bearing 96a between the trunnion 92 and the hook nut 96, the hook body 91 is rotatably supported by the trunnion 92.

A through hole 92a is formed in the side surface of the trunnion 92 so as to pass through the center axis thereof, and one end of the sheave shaft 93 is inserted and supported in the through hole 92a. On the other hand, bearings 95a are provided on the frame 95 facing the through holes 92a of the trunnions 92, respectively.
The other end of the sheave shaft 93 is supported by the bearing 95a.

The sheave shaft 93 is rotatably supported by a sheave 94 via a bearing 93a such as a rolling bearing. In this case, a plurality of sheaves 94 are provided on one sheave shaft 93, and in this embodiment, four sheaves 9 are provided.
4a, 94b,..., And one or more sheaves 94a located on the hook body 91 (trunnion 92) side, in this embodiment, one sheave 94a is larger in diameter than the other sheaves 94b. Preferably, the horizontal stability of the hook block 9 can be improved, and the hoist drum 5 and the head sheave 7 provided on the trolley 2 and the equalizer sheave 8 and the hook block 9 are provided. Interference between the wire ropes W bridged between the sheaves 94a and 94b can be prevented. The sizes of the sheaves may be changed in order.

The trunnion 92 and the frame 95 supporting the sheave shaft 93 together with the trunnion 92 are formed in a cross-girder shape so as to cover the outer periphery of the sheave 94 and, if necessary, the bottom surface. The protection of the W and the separation of the wire rope W from the sheave 94 are prevented.

It is preferable to use a deformed wire strand wire rope which is formed by twisting the strands and then compression-molding the wire rope, whereby the winding drum of the hoist and the head sheave of the hoist provided on the trolley are preferably used. A sheave 94a provided in the wire hooking groove and the hook block 9,
The wire hanging groove 94b can be formed small, and the trolley 2 and the hook block 9 can be downsized.

As described above, the sheave shaft 9 which rotatably supports the sheave 94 by utilizing the side space of the hook body 91.
8A, the dimension of the hook block 9 in the height direction, that is, the hook 9 is installed as shown in FIG.
The dimension CS between the slinging position 1a and the upper end of the sheave 94
To a conventional hook block (see FIGS. 8B and 8C).
Can be significantly shortened in comparison with.

When the overhead crane constructed as described above is installed alongside an underground structure such as a pumped-storage power station or a hydroelectric power station installed underground, the height B of the trolley 2 is increased.
S (see the right figure in FIG. 7C) can be set low, and the dimension of the hook block 9 in the height direction, that is, the dimension CS between the slack position of the hook 91a and the upper end of the sheave 94 (FIG. 8 (a) can be shortened. Further, when the suspension beam 11 is lifted, the inner girder member 10B does not become an obstacle, and the lifting height of the suspension beam 11 can be increased. As shown in FIG. 7, the overall height AS (see FIGS. 7A and 7B) is changed from the conventional overall height AL (FIG. 7A).
And (b) refer to the left figure), it can be set to be extremely low, so that an overhead crane can be installed,
The space required for operation can be reduced. As a result, the height of the ceiling of the underground space can be set low, and the construction cost of the underground structure can be significantly reduced.

[0041]

According to the overhead crane of the present invention, the support shafts of the hoist drum and the head sheave are supported at substantially the same level as the upper surface of the trolley frame, and approximately half of the hoist drum and the head sheave are placed in the trolley frame. By submerging, the height of the trolley can be set low without lowering the load capacity, and the space required for installing and operating the overhead crane can be reduced, which allows for the use of underground structures. In this case, the underground space can be effectively used, and in the case of the above-ground facilities, the building can be effectively used, and the construction cost thereof can be suppressed.

Further, by lowering a part of the gear box accommodating the speed reducer for the hoisting drum in the frame of the trolley, the height of the trolley can be set low, so that the overhead crane can be installed and operated. The space required for underground structures can be reduced, and this allows effective use of underground spaces for underground structures and buildings for overground facilities, thereby reducing their construction costs. Can be.

The hoist drum and the head sheave are supported by separate support shafts, and the support shaft of the head sheave is supported by a support frame installed in the frame of the trolley. The degree of freedom of the arrangement position is increased, and the head sheave can be safely supported even when a large load is applied, and the trolley can be easily balanced in structure, and the trolley can be downsized.

Further, by supporting the hoisting drum and the head sheave by a common support shaft, the support mechanism of the support shaft can be simplified.

Further, the sheave shafts are installed on both sides of the hook body of the hook block disposed on the trolley, and the sheaves are supported on the sheave shafts. The height of the hook block can be increased, and the space required for installing and operating the overhead crane can be reduced. In addition, in the case of ground equipment, buildings can be effectively used, and their construction costs can be suppressed.

Further, by supporting a plurality of sheaves on each sheave shaft and forming the sheave located on the hook body side larger in diameter than the other sheaves, the horizontal stability of the hook block can be improved. In this way, it is possible to prevent interference between the hoist drum and the head rope that is disposed on the trolley and the wire rope that is bridged between the sheave that is disposed on the hook block, and thus, the operation of transporting heavy objects can be reduced. It can be performed accurately and smoothly.

Further, two sets of girder are arranged facing each other, and the position of the lower surface of the inner girder member of each girder is set to be higher than the position of the lower surface of the outer girder member. The lifting height of the suspension beam suspended on the hooks of the trolley hook blocks traversing the pair of girders can be increased, thereby reducing the space required to install and operate the overhead crane Can be.

In addition, since the electrical components are concentrated and stored in the outer girder member, the height of the inner girder member can be reduced.

[Brief description of the drawings]

FIG. 1 is an overall external perspective view showing a first embodiment of an overhead crane according to the present invention.

FIG. 2 is an external perspective view of the main part.

3A and 3B show a trolley, wherein FIG. 3A is a plan view and FIG. 3B is a front view.

FIG. 4 is a side view when two overhead cranes are used.

FIG. 5 is a partially cutaway side view of the hook block.

FIG. 6 is a front view of the same.

FIG. 7 shows a comparison of height dimensions of the overhead traveling crane. The right figures in FIGS. 7A and 7B show the overhead traveling crane according to the present invention.
The left figure shows the conventional overhead crane, the right figure of (c) shows the trolley of the overhead crane of the present invention, and the left figure shows the trolley of the conventional overhead crane.

8A and 8B show a comparison of dimensions in the height direction of hook blocks, wherein FIG. 8A shows a hook block of the present invention, and FIGS. 8B and 8C show conventional hook blocks.

FIG. 9 is an external perspective view of a main part of a second embodiment of the overhead traveling crane according to the present invention.

[Explanation of symbols]

 1, 1A, 1B Girder 10A Outer girder member 10B Inner girder member 2 Trolley 21 Frame 22 Beam 23 Support frame 3 Gear box 4 Drive motor 5 Hoist drum 51 Support shaft 6 Bearing 7 Head sheave 71 Support shaft 8 Equalizer sheave 9 Hook block 91 Hook body 91a Hook 92 Trunnion 93 Sheave shaft 94 Sheave 94a Large diameter sheave 94b Small diameter sheave 11 Suspended beam W Wire

Claims (8)

[Claims] 1. Supporting the support shafts of the hoisting drum and the head sheave at substantially the same level as the upper surface of the trolley frame traversing the girder, thereby substantially halving the hoisting drum and the head sheave in the trolley frame. An overhead crane characterized in that: 2. An overhead crane wherein a part of a gear box accommodating a reduction device for a hoist drum is submerged in a frame of a trolley. 3. The hoist drum and the head sheave are supported by separate support shafts, respectively, and the support shaft of the head sheave is supported by a support frame installed in a frame of the trolley. 2. The overhead crane according to 2. 4. The overhead crane according to claim 1, wherein the hoist drum and the head sheave are supported by a common support shaft. 5. An overhead crane wherein a sheave shaft is installed in both sides of a hook body of a hook block disposed on a trolley, and the sheave is supported on the sheave shaft. 6. The overhead crane according to claim 5, wherein a plurality of sheaves are supported on each sheave shaft, and the sheave located on the hook body side has a larger diameter than the other sheaves. 7. The two sets of girder are arranged facing each other, and the position of the lower surface of the inner girder member of each girder is set to be higher than the position of the lower surface of the outer girder member. 7. The overhead crane according to claim 1, 2, 3, 4, 5, or 6. 8. The overhead traveling crane according to claim 7, wherein electrical appliances are concentrated and stored in the outer girder member.