JPH11147690A - Low head space reinforcing bar building-in device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a low head space reinforcing bar building-in device capable of surely holding and inserting a reinforcing bar cage even into a low head space. SOLUTION: A traveling device 3 is provided in the lower part of a structure 2 capable of supporting the suspending load of a reinforcing bar cage T, a horizontal traveling truck 6 operated by a hydraulic cylinder is provided in the upper part of the structure 2, and a pulley block 5 is provided in the horizontal traveling truck 6. The pulley block 5 is constructed in such a manner that a lower sheave block 54 is moved up down in a horizontal state by simultaneously winding the ends of a wire rope 53 and unwinding the same, the reinforcing bar case T is directly connected to an attaching metal fitting K fixed in the lower sheave block 54 by a pin and then the reinforcing bar cage T is built in.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a low head rebar construction device capable of securely holding and inserting a reinforcing bar cage even in a low head space when a continuous wall is constructed underground under a road or the like. is there.

[0002]

2. Description of the Related Art In underground construction work under narrow roads, such as under roads, construction work is extremely difficult due to the low height of the work space, particularly when construction of continuous walls is performed. In other words, in the conventional insertion of a reinforcing bar, it is impossible to insert a reinforcing bar of a normal length, so that the reinforcing bar is inserted into a narrow road by shortening the reinforcing bar, and the shortened reinforcing bar is inserted into the road. Were joined together to form a reinforcing bar cage of a desired form.

[0003]

Therefore, the construction cost is relatively high because the number of joints is large in order to produce one reinforcing cage, and the safety of the reinforcing cage in such a manner is secured. It takes a lot of effort to insert the device into the continuous wall and install it at a predetermined location.

[0004] It is an object of the present invention to provide a low head rebar construction apparatus which can solve the above-mentioned problems in the prior art.

[0004]

A feature of the present invention to solve the above-mentioned problem is that a rebar cage is inserted into a drilled continuous wall while being assembled into a block in a low underground work space underground. A rebar-building device, a turret that withstands a hanging load of the reinforced cage, a traveling device provided at a lower portion of the turret, and a traversing truck provided at an upper portion of the turret so as to be movable in at least one direction. A hydraulic cylinder device capable of positioning the traversing carriage; an upper sheave block and an equalizer sheave attached to the traversing carriage;
A pulley device comprising a lower sheave block bridged by a wire rope and capable of moving the lower sheave block up and down while maintaining a horizontal state by operating the wire rope; and A pair of winches for simultaneously winding and unwinding each end of the rope and moving the lower sheave block up and down while keeping the horizontal state, and fixed to the lower sheave block to connect the rebar cage to the pulley device The present invention is characterized in that it comprises a hanging piece of a reinforcing bar and a mounting bracket for directly connecting a pin.

[0005] According to this configuration, the turret can be moved by the traveling device, and the turret can be moved to a desired reinforcing bar erection position in the work space using a winch or the like. In addition, the trolley is moved to the required position on the turret, the lower sheave block is lowered, and the mounting piece is directly pin-connected to the hanging piece provided in advance in the reinforced cage. Can be linked. In this case, since the two can be directly connected by pin connection, even in a low head space where there is no head space, the height in the work space can be used effectively, and The height of the reinforcing bar can be increased.

[0006] After the rebar basket is suspended, both ends of one wire rope are simultaneously wound by a pair of winches. As a result, even when a difference in the amount of winding occurs between these winches, the difference is absorbed by the equalizer sheave through the sheave provided in the upper sheave block, so that the lower sheave block can maintain a horizontal state. In addition, the rebar basket can be raised and lowered horizontally.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a front view showing an example of an embodiment of a low head rebar construction device according to the present invention, FIG. 2 is a left side view thereof, and FIG. 3 is a plan view thereof.

[0008] The low head rebar construction apparatus 1 is rigidly connected and assembled by welding or bolting a shape steel, a square pipe, a steel plate, or the like, and sufficiently withstands a load for suspending a heavy reinforcing bar cage T. A turret 2 having a structure is provided, and a traveling device 3 for moving the turret 2 is attached to a lower frame 21 of the turret 2. In the present embodiment, a total of four traveling devices 3 are provided, one at each of the four corners, and are attached to the lower surface of the lower frame 21 via a turntable so that the traveling direction of the tower 2 can be arbitrarily selected. . As a result, by adjusting the direction of the traveling device 3 as described later, the entire turret 2 can be driven in a required direction by pulling the turret 2 with a winch or a chain block.

At the four corners of the lower frame 21, the weight of the tower 2 and the total weight of the steel cage can be further supported at the four corners so that the entire tower 2 can be stably installed during the construction work. Four hydraulic jacks 4 are provided. The hydraulic jack 4 is operated by a hydraulic device (not shown). When the hydraulic jack 4 is contracted, the traveling device 3 comes into contact with the ground.
Can be moved in a desired direction by the traveling device 3, and after the turret 2 is moved to a desired place, the hydraulic jack 4
, The traveling device 3 can be floated, and the tower 2 can be installed there with good stability. In this case, the level adjustment is performed by visually operating an operation device (not shown). When the turret 2 is moved sideways for replacement of the place with the EM excavator, each turntable of the traveling device 3 is rotated while the entire turret 2 is lifted by the hydraulic jack 4, and the traveling device 3 Is made to coincide with the desired moving direction, the hydraulic jack 4 is contracted, and the tower 2 is lowered again, so that the tower 2 can be moved in the lateral direction.

[0010] In order to be able to build the reinforced basket T using the tower 2, on the upper frame 22 of the tower 2,
A pulley device 5 for lifting is movably provided by a traversing carriage 6.

The traversing carriage 6 is connected to the beams 23, 2 of the upper frame 22.
The pulley device 5 is mounted on a trolley 6 with a known configuration so as to be movable along a pair of rails 25 and 26 provided on the rail 4 in the direction of the arrow X.
A pair of hydraulic cylinders 61, 62 are provided between the traversing carriage 6 and the upper frame 22, and the hydraulic cylinders 61, 62 are provided.
The hydraulic trolley 6 is expanded and contracted by a hydraulic device (not shown) connected to the trolley 6.
It can be positioned. Accordingly, the pulley device 5 mounted on the traversing carriage 6 can be positioned at a desired position along the X direction on the tower 2.

The pulley device 5 includes an upper sheave block 51 fixed to the trolley 6, an equalizer sheave 52 also fixed to the trolley 6, and an upper sheave block 51.
And an equalizer sieve 52 and one wire rope 5
3 and a lower sheave block 54 bridged with the lower sheave block 54.

As shown in detail in FIG. 3, the upper sheave block 51 has a plurality of sheaves 51c rotatably mounted on a support shaft 51b fixed to a fixed frame 51a. And an upper second sheave block 51y in which a number of other sheaves 51e are rotatably mounted on a support shaft 51d which is also fixed to 41a.

On the other hand, the lower sheave block 54, as shown in detail in FIG.
In order to correspond to 1x, a fixed frame is provided so as to correspond to a lower first sheave block 54x in which a number of sheaves 54c are rotatably attached to a support shaft 54b fixed to a movable frame 54a and an upper second sheave block 51y. It comprises a lower second sheave block 54y in which a number of sheaves 54e are rotatably mounted on a support shaft 54d fixed to 54a.

FIG. 4 is a wiring diagram of the pulley device 5 described above. The wire rope 53 is
Sheave block 51x and lower first sheave block 54x
After the number of sheaves is extended between the upper sheave block 51y and the lower second sheave block 54y, the number of sheaves is once extended to the equalizer sheave 52. It has a configuration. One end 53A and the other end 53B of the wire rope 53 extend downward through return sheaves 55 and 56 (see FIG. 1) provided on the upper frame 22, and are fixed to the lower frame 21 of the tower 2. Are connected to a pair of winches 71 and 72 respectively. The winches 71 and 72 constitute the hoisting device 7 for the pulley device 5, and in the present embodiment, electric winches 71 and 72 are electric portable winches. If the number of sheaves is increased to increase the number of wire ropes 53, it is possible to lift a heavy-load reinforced cage.

The winches 71 and 72 are configured to simultaneously wind and unwind both ends of the wire rope 53 by operating a controller (not shown) provided separately from the main body, whereby a pair of winches 71 and 72 are provided. Even if there is a difference in the amount of winding, the upper sheave block 5
Through 1, the difference is absorbed by the equalizer sieve 52,
The lower sheave block 54 can be raised and lowered horizontally.

In order to connect the reinforced basket T to the lower sheave block 54 so that the head in the working space can be effectively used, the hanging piece K81 of the reinforced basket T is provided on the frame 54a of the lower sheave block 54. A mounting bracket K that can be directly connected to the pin 82 is fixed (see FIG. 1). In the illustrated example, the mounting brackets K are provided at both ends of the lower sheave block 54, but the number of the mounting brackets K is not limited to two, and an appropriate number may be provided.

Referring to FIGS. 5 and 6, there is shown an enlarged view of a main part of a portion where one of the mounting brackets K and the hanging pieces 81 and 82 of the reinforcing bar cage T are directly pin-connected. Mounting bracket K
Is a member of a character in which a spacer KC is inserted between two plate members KA and KB arranged in parallel and integrally fixed.
In the mounting bracket K, mounting holes 81 of the suspension pieces 81 and 82 are provided.
Apertures K1 and K2 corresponding to a and a are provided, and mounting holes 81a and 82a of the suspension pieces 81 and 82 are provided.
Are aligned with the through-holes K1 and K2.

Therefore, in order to suspend the rebar basket T on the lower sheave block 54, the through-holes K1
K2 is set to each of the mounting holes 81 of the hanging pieces 81 and 82 of the reinforcing rod cage T.
By simply passing the pins 83 and 84 in a state of being aligned with the a and 82a, the two can be directly pin-joined. As described above, since the mounting bracket K of the reinforcing cage T can be directly connected to the lower sheave block 54 by the pins, the space for connection is small, and the height of the narrow working space under the road is effectively used. And the reinforced basket T can be lifted. In this way, by effectively using the height of the work space, the height of the rebar basket that can be handled in the work space can be made higher than before, and a rebar basket of the same length can be built in the continuous wall. In this case, the number of connection points can be reduced, and the work efficiency can be greatly improved and the cost can be reduced.

Next, by unwinding the wire rope 53 by the winches 71 and 72 and lowering the reinforcing rod cage T, the reinforcing rod basket T can be accurately built at a required position in the continuous wall. Since the lifting and building of the reinforcing bar cage T can all be performed using the low-headed reinforcing bar building device 1,
The work can be performed relatively easily by a small number of workers, and there is an advantage that the construction can be performed safely as compared with the conventional method in which all the work is manually performed.

In the low head rebar construction apparatus 1, the operation of the hydraulic cylinders 61 and 62 and the winches 71 and 72 is performed using a hydraulic apparatus and a control panel (not shown) provided separately from the tower 2. Yes, this allows the size of the tower 2 to be minimized. In addition, the width of the tower 2 at the wall center is reduced in order to minimize the amount of chipping of the already constructed continuous wall.

Since the low-headed reinforcing bar erection apparatus 1 is constructed as described above, it has the following features. (1) The hanging pieces 81 and 82 of the reinforcing bar T and the mounting bracket K
The head is directly connected with the pin, so that a large lift can be obtained, and a long reinforcing rod cage can be used. (2) By using two winches 71 and 72 and increasing the number of wire ropes 53, it is possible to lift a heavy load reinforced cage, and by using a single wire rope 53, the reinforced cage T Is always kept horizontal. Further, since the structure can be wound up by the winch, there is an advantage in cost. (3) The pulley device 5 is mounted on the traversing trolley 6, and the traversing trolley 6 is horizontally moved by the hydraulic cylinders 61 and 62, so that the rebar basket T can be accurately positioned. In addition, even when the reinforcing bar basket T is moved laterally, the reinforcing bar basket T can be moved horizontally without moving up and down by the fixed equalizer sheave 52. Therefore, the taking in of the reinforcing bar cage and the positioning of the reinforcing bar cage can be performed efficiently.

[0023]

According to the present invention, it is possible to effectively use a limited working height such as under a road, so that a relatively long reinforcing cage can be used and the number of joints can be reduced. Work costs can be reduced.

In addition, since the structure is such that the reinforcing cage can be hung from the fixed tower, the stability can be greatly improved, the accuracy of the erection position can be improved, and the work safety can be significantly improved. Can be improved.

[Brief description of the drawings]

FIG. 1 is a front view showing an example of an embodiment of a low-headed reinforcing bar building device according to the present invention.

FIG. 2 is a left side view of the low head rebar construction device according to FIG. 1;

FIG. 3 is a plan view of the low head rebar construction device according to FIG. 1;

FIG. 4 is an explanatory diagram for explaining wiring of the pulley device of the low-headed rebar construction device shown in FIG. 1;

FIG. 5 is a front view showing a main part of a connecting portion between the suspension beam and the suspension piece of the reinforcing cage in the low-headed reinforcing bar building apparatus shown in FIG. 1;

FIG. 6 is a plan view showing a main part of a connection portion between the suspension beam and the suspension piece of the reinforcing bar cage in the low head rebar construction device shown in FIG. 1;

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 low head reinforcing steel building device 2 turret 3 traveling device 5 pulley device 6 traversing trolley 51 upper sheave block 52 equalizer sheave 53 wire rope 54 lower sheave block 61, 62 hydraulic cylinder 71, 72 winch 81, 82 suspension piece 83, 84 Pin K Mounting bracket T Reinforcing cage

Claims (1)

[Claims] 1. A reinforcing-bar building apparatus for inserting a reinforcing cage in a block in a basement-low work space, and withstanding the hanging load of the reinforcing cage. A turret, a traveling device provided at a lower portion of the turret, a traversing truck provided at an upper portion of the turret so as to be movable in at least one direction, and a hydraulic cylinder device capable of positioning the traversing truck, An upper sheave block and an equalizer sheave attached to the traversing carriage, a lower sheave block bridged by a single wire rope and the upper sheave block and the equalizer sheave, and the lower portion is operated by operating the wire rope. A pulley device capable of moving the sheave block up and down while maintaining a horizontal state; and each of the wire ropes attached to the tower. A pair of winches for simultaneously winding and unwinding the ends and moving the lower sheave block up and down while keeping the horizontal state, and the rebar cage fixed to the lower sheave block to connect the rebar cage to the pulley device. A low head rebar construction device comprising: a hanging piece; and a mounting bracket for directly connecting a pin.