JPH0669877B2 - Bridge crane - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bridge crane that is necessary for loading and unloading caisson.

[0002]

[Technical background] The work involved in caisson digging is mainly excavation and the discharge of sediment produced by excavation. These two types of work are performed simultaneously in a narrow work area. It is an iron rule to avoid the interference situation as much as possible so as not to hinder the opposite work.

[0003]

2. Description of the Related Art In order to avoid interference as much as possible in the two kinds of work such as excavation and sediment discharge, as described above, a caisson annular concentric circular rail is installed around the caisson construction site.
A beam member provided with a wheel that engages with the annular rail is installed in the diametrical direction, and a predetermined work is performed by a necessary working means hung from the beam member, that is, an excavating device and a sediment discharging device. The two dissimilar devices always operate in both diametrical tips of the caisson to avoid these interference situations as much as possible.

[0004]

The annular rail to be installed at the outer peripheral position of the caisson used in the above-mentioned conventional method is one in which a plurality of rails are installed in a concentric circle in order to correspond to the calculated load according to the scale of the caisson. The inter-rail width of the annular rail to be installed is set, and this annular rail installation area, including the caisson area, often requires about 10 times the caisson area itself, which is unexpected in the construction of one caisson. The work area was required.

If the above required work area can be easily secured, there is no problem. However, as is well known, in the case of having difficulty in securing a recent important point, the conventional construction method described above can be adopted. It is impossible, and the caisson construction work itself is in jeopardy.

Therefore, the present invention eliminates the vast necessary work area required by the conventional construction method, and does not hinder the work of constructing a caisson with an area slightly larger than the substantially required caisson construction area. The purpose is to provide a bridge crane that can be operated.

[0007]

As a means for achieving the above object, the first invention is a diametrical direction which passes through the center of a caisson to be sunk on the ground where the caisson is to be constructed. A bridge is supported by a plurality of bridge piers at a position directly above the line, and a double shaft is rotatably supported in the longitudinal direction at a position corresponding to the center position of the caisson of the bridge to penetrate the center shaft and outer shaft. The rotation force can be independently applied to each of the above, and the carrying-out swivel arm and the excavating swivel arm can be horizontally rotated to each of the center shaft and the outer shaft projecting from the lower surface of the bridge. The traveling swing winch is engaged with a traveling winch, and the power bucket is hung from the traveling winch via the wire and the power cable. Sand excavation means are formed, and a plurality of pulleys are provided on the other excavating swing arm to suspend and excavate from a part of the bridge or a cable reel for excavation installed at another place leading to the bridge. Is engaged with the middle of the cable required for and the excavator is connected to the tip of the cable.

According to a second aspect of the present invention, an unloading rail whose end face is formed in the same shape as the end face of the unloading swivel arm is at the same height as the unloading swivel arm, and at the tip position of the unloading swivel arm. It is supported and installed on the lower surface of the bridge so that the circle line of the rotation trajectory is the inner end, and the tip of these oscillating arms for unloading and the inner end of the transport rail can face each other with a minute gap. It consists of

A third aspect of the present invention is to provide a wheel at the lower end of a bridge pier supporting a bridge so that the wheel can be arbitrarily engaged with a rail installed in a caisson installation area.

In a fourth aspect of the present invention, an annular shape is formed on the lower surface of the bridge at a circular line centered around the double axis with a radius that does not reach the length of each of the carry-out swing arm and the excavation swing arm. While suspending the auxiliary track, load receiving wheels provided on the upper surface of either or both of the discharge swivel arm and the rotary excavation arm are engaged with the annular auxiliary track to load a part of the load on the shaft. The wheel is shared by the receiving wheels.

[0011]

[Function] In the area where the caisson is to be constructed, in the diameter direction of the planned caisson, directly above the caisson center position of the bridge supported by the bridge piers, a double axis similar to that of an analog clock is set vertically and the center axis , Each of the outer shafts is rotatably supported in the same or different directions, and each of the center shaft and the outer shaft has the same structure as that of the minute hand and the minute hand of the timepiece. The end of the swivel arm allows horizontal rotation based on the arbitrariness of the operation,
One of the swing arms is a swing arm for excavation, and a pulley for engaging a necessary cable such as a suspension cable and an electric power cable equipped with an excavator at the lower end is provided, and provided on a part of the bridge or another place connected to the bridge. The cable reels for excavation are bridged.

A traveling winch engaged with the other ejection swing arm in a suspended state is free to travel by remote control, and a booster mechanism is interposed in the traveling winch. Wire and power cable are connected, and the tip of each of these is connected to the power bucket.

A swivel motor for enabling independent operation is connected to each of the above-mentioned double shaft middle shaft and outer shaft, and the discharge swivel arm and the excavation swivel arm are separately and respectively It is possible to turn in any direction and within any angle range.

In this case, it is desirable that the discharging swivel arm and the excavating swivel arm are set at positions opposite to each other as much as possible for the work.

The power bucket and the excavator suspended on each of these arms are well known and are remotely controlled according to the instructions of the operator.

The power bucket, which is frequently moved up and down, wraps the soil and when it reaches the uppermost position, it swivels the swivel arm for discharge as necessary, and the front end surface thereof is fixed to a fixed position for transportation. Accurately face the inner end surface of the rail, run the traveling winch on the transport rail while maintaining the state with respect to the rolled up power bucket, stop it on the soil hopper, and open the power bucket for soil removal. It was done like this.

The wheels at the lower end of the pier, which are provided as needed, are designed so that the wheels can be operated by operation on the rails laid in the caisson construction work area. In this case, the power bucket and the excavator are the best. The caisson unit that has been brought in from another place can also be carried in by using the wire for lifting, by raising it to the position and making the power bucket stand by on a bridge etc. in a temporary holding form.

The caisson to be constructed can be of various sizes and uses a power bucket and an excavator having functions according to the size of the caisson, but they are all suspended by a swivel arm to support the load of these loads. All of them are loaded on the middle and outer shafts, and in some cases there is a concern that the double shaft will be damaged due to a heavy load.
If it is assumed that the supporting force is insufficient, the load-bearing wheels provided on the upper surface of the swing arm are engaged with the annular auxiliary rails installed on the lower surface of the bridge, and the load is distributed to other than the double shaft to distribute the entire equipment. Is designed to be safe.

In this way, the power bucket and the excavator are suspended from the two swivel arms via the wires and cables, and these two swivel arms, that is, the swivel arm for discharge and the swivel arm for excavation are provided. , It is a bridge configuration that allows the caisson to be swiveled around a position directly above the center of the caisson to be constructed, so that the caisson can be constructed with a minimum work area.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, referring to the drawings, an embodiment of the present invention will be described. It is necessary to have a bridge 2 in the air which has at least four bridge piers 3 on the outside of the caisson 1 or the planned construction area of the caisson. Accordingly, the sub-bridge 2a is firmly suspended, and in the bridge 2, a double shaft 4 including a center shaft 4a and an outer shaft 4b is provided at a position directly above the center of the caisson 1.
Of the pier 3 so that the driving force of the turning motor 19 can be turned in the turning direction with respect to each individual shaft while supporting the set load and rotatably supporting the shaft. The remote control can be performed from the inside of the operation room 23 provided in a part of the. It should be noted that all other operation commands can be mainly issued in the operation room 23.

In the double shaft 4 which penetrates the bridge 2 and projects to the lower surface of the bridge 2, the outer shaft 4b is firmly fixed to the outer end of the discharge swivel arm 5a having a radius substantially equal to that of the caisson 1. In addition, the excavating swivel arm 5 is also attached to the center shaft 4a.
The base end of a is firmly fixed. Both arms 5a, 5b
Needless to say, all of them adhere horizontally to each other.

The discharging swivel arm 5a has an I-shaped or H-shaped cross-sectional shape and suspends the traveling winch 6 by pivotally supporting the wheel 15 engaged so as to face the inner wall thereof. The driving force is obtained from the traveling winch 6 for a part of the vehicle to be self-propelled.

One end of a wire 7 is fastened to the traveling winch 6 and the other end is bound to a winding reel 6a, and a booster mechanism 6b and a pulley 9a of a power bucket 9 are engaged in the middle thereof.

A power cable 8 is supplied to the power bucket 9 in addition to the wire 7 and is connected to a drive source for controlling the opening and closing of the power bucket 9.

On the other hand, a plurality of pulleys 10 are rotatably mounted on the lower surface of the excavating swivel arm 5b, and a cable 12 having an excavator 13 connected to the lower end thereof and a power cable 8 are engaged with the pulley 10. , These cables 12 and the power cable 8 on the slewing arm 5a side for carrying out, are led out onto the bridge 2 through the hollow cylinder of the middle shaft 4a of the double shaft 4, and a part on the bridge 2 or a portion connected to the bridge 2. It is wound around each of the excavating cable reel 11 and the power cable reel installed at the location.

All the loads of the power bucket 9 and the excavator 12 holding the above-mentioned discharged earth and sand are applied to the two swivel arms 5, respectively, and all of the loads of the swivel arms 5 are applied to the double shaft 4. . Therefore, in the case of construction work of a large-scale caisson 1, even if the supporting force of the double shaft 4 is increased, it is still dangerous, and it is assumed that there is an opportunity to be damaged, if not damaged. Therefore, auxiliary load receiving means may be provided if necessary.

The auxiliary load receiving means has an I-shaped section and an H-shaped section on the back surface of the bridge 2 along a circle drawn centering on the position of the double shaft 4 with a dimension shorter than the length of the revolving arm 5 as a radius. Alternatively, an annular auxiliary track 17 is laid with a channel-type material, and on the other hand, a large load of the two swivel arms 5 is expected, especially the swivel arm 5a for discharge is mainly used, and in some cases, the swivel arm 5b for excavation as well. The load receiving wheel 18 is mounted on the upper surface of the revolving arm 5 that matches the annular auxiliary track 17 and is engaged with the wheel.

Further, the carrying rail 14 formed of the same material as the carrying-out swivel arm 5a is attached to the lower surface of the bridge 2, and the carrying-out swivel arm 5a swivels at its inner end. The both ends of the traveling winch 6 face each other, and the traveling wheels of the traveling winch 6 are installed through a small gap that allows the traveling wheels to be transferred to each other in conformity with the circular line of the tip of the rail 14 for transportation. An earth discharging hopper 20 is installed in the lower part of the tip.

Further, if necessary, wheels 21 are provided at the lower ends of the bridge piers 3 supporting the bridge 2, and the wheels 21 are engaged with the rails 22 installed in the caisson construction work area to make the bridge itself movable. It may be convenient to carry in the unit caisson 1 constructed elsewhere.

[0030]

As described above, according to the present invention, when constructing a caisson, the main work is excavation, and the excavation work carries out the produced sand and sand. These works should be performed without interfering with each other in the caisson. Is an iron rule, and therefore, in the past, since each work form that acts on the inner peripheral side of the caisson from the outer peripheral direction of the caisson was adopted, it was necessary to secure a vast work site at the outer peripheral position of the caisson.
In this invention, the length of the analog clock is much shorter than the center position of the bridge across the diameter of the caisson to be constructed.
Since two swivel arms can be swung freely like a short hand, and a carry-out bucket mechanism and an excavating mechanism are hung on each of these two swivel arms, the substantial area required for these operations is to be constructed. It is possible to construct caisson in a small area that is slightly larger than the flat area of the caisson.

[0031]

[Brief description of drawings]

FIG. 1 is a plan view of the device of the present invention, and FIG. 2 is a front view of the present invention showing a caisson in cross section.

[0032]

[Explanation of symbols]

 1 Caisson 2 Bridge 2a Sub-bridge 3 Double pier 4 Double shaft 4a Middle shaft 4b Outer shaft 5 Swing arm 5a Discharge swivel arm 5b Excavating swivel arm 6 Travel winch 6a Winding reel 7 Wire 8 Power cable 9 Power bucket 9a Pulley 10 Pulley 11 Cable reel for excavation 12 Cable 13 Excavator 14 Transport rail 15 Wheel 17 Annular auxiliary track 18 Load receiving wheel 19 Turning motor 20 Earth hopper 21 Wheel 22 Rail 23 Operation room

Claims (4)

[Claims] 1. A bridge is supported by a plurality of bridge piers at a position directly above which corresponds to a diametrical line passing through the center of the caisson to be sunk on the ground where the caisson is to be constructed, and the bridge corresponds to the caisson center position of the bridge. The double shaft is rotatably supported in the longitudinal direction of the position to penetrate therethrough, and the center shaft and the outer shaft can be individually given a rotational force independently, and the double shaft is projected from the lower surface of the bridge. Each of the center shaft and the outer shaft is firmly attached to the carry-out swivel arm and the excavating swivel arm so that they can be horizontally rotated.The carry-out swivel arm is provided with a traveling winch having the carry-out swivel arm as a track. In this case, a power bucket is hung from a traveling winch via a wire and an electric power cable to form a sand discharging means, and a plurality of pulleys are provided on the other swing arm for excavation and the bridge is provided. Part of the cable, or hanging from a cable reel for excavation installed at another place leading to the bridge, engaging the middle of the cable required for excavation work, and connecting the excavator to the tip of the cable. Bridge crane. 2. A circular line of a rotation locus at the same height as the carry-out swivel arm and a rotation locus of the tip position of the carry-out swivel arm, the carry-out rail having an end surface formed in the same shape as the end face of the carry-out swivel arm. Is supported and installed on the lower surface of the bridge so that the inner ends of the swinging arms and the inner ends of the transfer rails can face each other with a minute gap. The bridge crane according to claim 1. 3. A wheel is provided at a lower end of a bridge pier supporting a bridge so that the wheel can be freely traveled by engaging with a rail installed in a caisson installation area.
And the bridge crane described in 2. 4. An annular auxiliary track is hung on a lower surface of the bridge at a circle line position centered on a double axis with a radius that does not reach the length of each of the carry-out swing arm and the excavation swing arm. At the same time, the load receiving wheel provided on the upper surface of either or both of the discharging swing arm and the excavating swing arm is engaged with the annular auxiliary track, and a part of the load applied to the shaft is shared by the load receiving wheel. The bridge crane according to claim 1, 2 or 3, wherein