JPH0355639Y2 - - Google Patents

Description

[Detailed description of the invention] (Industrial application field) This invention is used in the submerged box construction method, the vertical shaft pressure construction method, etc., when carrying heavy objects such as hydraulic grab buckets and materials from the ground or between work rooms. Regarding cable threading hardware.

(Conventional technology) Conventionally, in this type of construction method, it was necessary to maintain airtightness in the work room with the hatch of the locking device installed above the work room as a boundary, so it was necessary to use a single cable (one steel cable). The situation was such that only the hoisting device could be used.

(Problems to be Solved by the Invention) For this reason, it has been associated with the disadvantage that the supporting force of relatively heavy objects is weak and dangerous.

In addition, it is difficult to apply multiple ropes due to the lack of airtightness in the work room, but even if support with multiple ropes is possible, the work must proceed quickly because the multiple ropes will twist on the plane. Another problem was that it was necessary to prevent twisting at the top.

(Means for Solving the Problems) The present invention was proposed in view of the above points, and its purpose is to easily double-rope heavy objects, that is, lifting equipment, in the submerged box construction method, the vertical shaft pressure construction method, etc. This improves safety by making it possible to support
It is an object of the present invention to provide a multi-rope metal fitting for supporting a hanging tool in a submerged box construction method or a vertical shaft pressure construction method, which has good workability.

That is, in order to achieve the above object, the present invention has a structure in which the hardware can be placed in the central opening of the hatch provided at the top of the material lock, and a plurality of through holes for passing steel cables and electric wires are formed at appropriate positions. and an arm that can be locked with the peripheral wall of the upper opening of the material lock, and a hoisting device connected to the upper part of the hanging device suspended by the multiple ropes. It is configured to be placed on a sheep.

(Structure of the invention) Figures 1 to 5 show an embodiment of the invention.
is a concrete structure like a caisson, with a slab 2 formed at the bottom, and a working chamber 3 below this slab 2.

Reference numeral 4 denotes a hollow material lock installed above the slab 2, and a pair of lower hatches 6 are provided at the lower part of the lock which can be opened and closed about an axis a by operating a hydraulic jack 5. The structure is such that access can be made between the inside of the material lock 4 and the work chamber 3.

Further, 7 is a cylindrical manhole shaft connected above the material lock 4, and a pair of upper hatches 9 are provided at the connecting portion to be opened and closed by a hydraulic jack 8 provided within the material lock 4.

Reference numeral 10 denotes a hydraulic grab bucket that can be moved within the work room 3, material lock 4, and manhole shaft 7 via a hoisting device (not shown) such as a crane installed above. The hoisting sheep 11 is connected to form a hoist, and the hydraulic grab bucket 10 is connected to multiple ropes (in this embodiment, steel cables 14 to 1) through this hoisting sheep 11.
It is suspended by four hooks of 5'.

The hydraulic grab bucket 10 has a built-in hydraulic power unit (not shown) necessary for operating the hydraulic jack for opening and closing the bucket, and a bundle of electric wires for power supply driving the power unit and a bundle of operation wires (multi-conductor) for opening and closing the bucket. A captire cable (hereinafter collectively referred to as an electric wire) is required, and this electric wire 13 is also suspended from a wire winder mounted on a crane or the like.

Then, this steel cable 14 is placed directly above the hoisting sheep 11.
~ 15' and a multi-cable passing hardware 12 through which electric wires 13 are passed are placed, and this hardware 12 is attached to the manhole shaft 7.
It is constructed so that it can be lowered together with a hanging tool such as a hydraulic grab bucket 10.

FIGS. 4 and 5 show the details and operation of this multiple cable threading hardware 12. The multiple cable threading hardware 12 has a substantially square shape, for example, and has a through hole 12a formed in the center. The electric wire 13 is inserted through the hole 12a. In addition, multiple rope threading hardware 12
Through holes 12b are also formed at each of the four corners of the hoist, and square steel cables 14 to 15' wound around the hoisting sheep 11 are inserted through these holes 12b. Positioning arms 16 serving as locking members are provided on both sides of the upper portion of the multiple cable threading hardware 12, respectively. This positioning arm 16 has, for example, a substantially L-shape, and its inner end 16a is connected to the multiple cable threading hardware 12.
It is connected to the upper surface, and the outer end portion 16b extends outward, and when the upper hatch 9 is closed, the multiple cable threading hardware 12 is formed in the center thereof, and the shape of the multiple cable threading hardware 12 matches the shape of the main body. When located in the correspondingly formed opening 9a, the material lock 4 and the peripheral wall 4 of the upper opening 4a of the manhole shaft 7
It is adapted to abut and lock onto a locking portion 4c provided at b. In other words, when the double cable threading hardware 12 descends and reaches a predetermined position above the material lock 4, the positioning arm 16 locks with the locking part 4c provided at the top of the material lock 4, and thus the double cable threading occurs. The hardware 12 is configured to stop at that position.

Next, the configuration of the present invention and its associated operations will be further explained with reference to FIGS. 1 to 5.

Normally, the multiple rope threading hardware 12 is simply placed on the hoisting sheep 11, so it can be easily separated from the hoisting sheep 11.

Now, when the hydraulic grab bucket 10 is lowered from above the manhole shaft 7 by operating a hoisting device such as a crane, the multiple rope passing hardware 12 is lowered downward at the same time. At this time, the lower hatch 6 of the material lock 4 installed on the slab 2 above the high-pressure work chamber 3 is closed by operating the hydraulic jack 5, while the upper hatch 9 is closed by operating the hydraulic jack 8. It is opened by retracting the piston rod.

That is, as shown in FIG. 4, the tip of the piston rod of the hydraulic jack 8 is connected to the lower surface of the upper hatch 9 via a pin 9b.
Guide pins 9c and 9d are integrally protruded from the sides of the material lock 4, and these guide pins 9c and 9d are connected to the guide rail 1 provided in the material lock 4.
7, 18, and the upper hatch 9 is slidably fitted into the guide rails 17, 1 by operating the hydraulic jack 8.
8 to open and close the opening 4a. In this case, as shown in FIGS. 4 and 5, airtight packings 19a, 19b are provided at the inner and outer ends of the upper hatch 9, respectively.
19c is provided and the upper hatch 9 is closed,
It is constructed to maintain an airtight state inside. Further, the guide rails 17 and 18 are erected on both sides of the material lock 4 via appropriate fixing means.

A hydraulic grab bucket 10 and a hoisting sheep 11 are suspended in the material lock 4, and a multi-rope passing hardware 12 is attached to the positioning arm 1.
6 to be hooked to a predetermined position on the upper part of the material lock, it remains in that position. In this case, when the upper hatch 9 is closed with the hydraulic jack 8, the multiple cables pass through as shown in Figs. 4 and 5. The hardware 12 is held within the opening 9a of the upper hatch 9 and is integrated with the upper hatch 9. This allows the interior of the material lock 4 to be closed.

Next, the material lock 4 is filled with compressed air of the same pressure as the high-pressure work chamber 3, the lower hatch 6 is opened with the hydraulic jack 5, the hydraulic grab bucket 10 is lowered into the high-pressure work chamber 3, and the hydraulic The grab bucket 10 is opened and closed to excavate and grab earth and sand in the high-pressure work chamber 3. Then, by performing the opposite operation of lowering, the hydraulic grab bucket 10 is taken out from the manhole shaft 7 to discharge the earth and sand, and is also put into the high pressure work chamber 3 from the manhole shaft 7 via the material lock 4 for excavation. It is better to repeat soil removal.

In this way, in the present invention, the central part of the conventional single rope hatch is slightly modified and the multiple cable threading hardware 12 is arranged in the center, thereby eliminating the problem caused by the twisting of the multiple cables on the plane. Hydraulic grab bucket 1
0 etc. can be easily used.

(Effects of the invention) As described above, according to the invention, the material lock can be installed in the central opening of the hatch provided at the upper part of the material lock, and a plurality of through holes for passing steel cables and electric wires are formed at appropriate positions. In addition, since the upper part is provided with an arm that can be locked with the peripheral wall of the upper opening of the material lock, heavy objects can be supported by multiple ropes, increasing the supporting force and improving safety. There are advantages.

Moreover, it is possible to prevent twisting of the multiple ropes on a plane and to quickly proceed with the work while maintaining airtightness in the work room.

[Brief explanation of drawings]

FIG. 1 is a front sectional view showing an embodiment of the present invention;
Fig. 2 is a side sectional view of the same as above, Fig. 3 is a plan view of the material lock part in Fig. 1 seen from above, Fig. 4 is an enlarged view of the main part of the present invention, and Fig. 5 is a plan view of the same as above. . 4...Material lock, 10...Hydraulic grab bucket, 11...Sheep for hoisting, 12...Multiple rope passing hardware, 12a, 12b...Through hole, 16...
Positioning arm, 14-15'...steel cable.

Claims (1)

[Scope of utility model registration request] It can be installed in the central opening of the hatch provided at the top of the material lock, and has a plurality of through holes formed at appropriate positions for passing steel cables and electric wires, and has a peripheral wall of the upper opening of the material lock at the top. A submersible box construction method characterized by being provided with an arm that can be locked with the rope, and placed on a hoisting sheave connected to the upper part of the hoist suspended by the multiple ropes, Multi-rope hardware for supporting hanging equipment in construction methods.