JPH07895B2 - Reinforcing cage construction equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to construction of a continuous wall, which is a retaining earth for a shaft, underground passage, sewer, or other vertical shaft or foundation work of a large structure, and a combined foundation of a large structure. The present invention relates to a device for constructing a rebar cage used at a predetermined point for construction, hoisting or horizontally moving large structures or large machines, and the like.

[Prior Art] Reinforcing bar cages are usually assembled and processed in a horizontal state, and therefore, when they were built, conventionally, two crawler cranes were used to raise them from a horizontal state to a vertical state by so-called hanging.

Here, the total length of one element of the rebar cage is divided into several rods, and each rod is often joined by lap welding of the main bar in the longitudinal direction, and its weight is very large.
For this reason, it is common to use a crawler crane with a suspending capacity of several hundred tons to suspend the rebar cage in the drill hole.

Further, in the case where a reinforcing bar having a thread is formed as a longitudinal main bar of the reinforcing bar cage to be joined with a nut, or when the main bar is pressure-welded, a high precision is required for suspending the reinforcing bar cage.
For this reason, a device has been developed in which receiving holes for receiving protruding metal objects (so-called "kanzashi") are arranged on the side surface of the rebar cage and the hanging operation is performed while replacing the kanzashi.

[Problems to be Solved by the Invention] However, when the rebar cage is raised by hanging the crane together, there is a problem that the rebar cage is deformed by its own weight and causes a hindrance when performing joint work.

In addition, there is a risk that the vertical rebar cage may fall due to the recoil when it is pulled up.

Further, although there is a limit to the suspension by a large crane due to the weight of the object to be suspended, as described above, the rebar cage has a large weight. Therefore, it is very difficult to hang up the reinforced basket by the crane, especially in the case of the joint method in which the hanging accuracy is required.

In addition to this, in the case of the above-mentioned device that suspends while replacing the above-mentioned kanzashi (protrusion metal object), it is necessary to use a crane until the rebar cage is held by the device,
The above-mentioned inconvenience occurs. Further, when suspending the rebar cage, it is suspended while replacing the kanzashi, so continuous work cannot be performed and loss time increases, resulting in very poor work efficiency.

In view of these problems, there is a demand for a reinforced cage construction device that enables rapid and accurate reinforced cage construction without the need for a crane. The present invention was developed to meet such a demand.

[Means for Solving the Problems] A reinforced cage construction device according to the present invention includes a plurality of reinforced cage pedestals and a plurality of reinforced cages on which a gantry and a reinforced cage are placed and rotated from a horizontal state to a vertical state. A raising device including a protruding metal object,
A suspending device including an elevating mechanism and a reinforcing bar cage holding frame provided with a protruding metal holding means and automatically suspending the reinforcing bar cage, and an adjusting mechanism for adjusting the position of the reinforcing bar cage are provided.

In carrying out the present invention, one end of the rebar cage basket is pin-connected to the frame, and the wire cage, the winch, and the pulley provided on the frame are configured to rotate from a horizontal state to a vertical state. Is preferred. However, a hydraulic jack or the like may be used instead of the wire and winch.

In addition, the elevating mechanism, center hole jacks arranged vertically, a rotating nut rotatable by a motor,
It is preferably composed of a screw penetrating the center hole jack and the rotary nut and having a thread formed on the whole.

Further, the adjusting mechanism moves the upper and lower jacks up and down by a signal from the limit switch for detecting the upper and lower limit positions of the rotating nut, the upper and lower limit positions of the jack, or the position where the upper and lower center hole jacks receive the load. It is preferable to have a control mechanism including a microcomputer that controls opening and closing of the hydraulic electromagnetic valve for moving and driving and stopping of the motor that rotates the rotating nut.
Here, a photoelectric switch may be used instead of the limit switch. The motor that rotates the rotary nut may be an electric motor or a hydraulic motor.

[Operation] According to the reinforced basket building device of the present invention having the above-described configuration, the reinforced basket assembled and processed in the horizontal state is raised as it is, mounted and held on the device, and the raising device is operated. It can be raised vertically by rotating. If the gantry is installed above the drill hole, the rebar cage automatically stops on the center line of the drill hole. Therefore, a crane or a device dedicated to raising is unnecessary.

Further, even if a hydraulic jack is used for the lifting mechanism, the hanging device reduces the waiting time when the load is transferred, so that the jack can be continuously operated without waiting for the lifting or lowering of the jack. , Reinforcement basket can be quickly hung.

Furthermore, when jointing the built-in rebar cages, the adjustment mechanism accurately adjusts the horizontal and vertical positions of the newly installed rebar cages, so the joints can be aligned with high accuracy. Can be done by This is very advantageous, especially in the case of screw joints.

It is also possible to use the above-described lifting mechanism alone as a lifting device.

Embodiments Embodiments of the present invention will be described below with reference to the drawings.

In FIGS. 1 to 3, one end of a rebar cage 16 is pin-attached to the lower part of the frame indicated by reference numeral 1 (indicated by reference numeral 16a).
Has been done. A pulley 16b is provided at the other end of the reinforcing bar cage support 16, and the pulley 16b is a pulley 1a provided on the top of the gantry 1.
It is connected to a winch 12 provided at a lower portion of the gantry 1 via a wire rope 11. As a result, when the winch 12 is driven, the reinforcing bar pedestal 16 rotates about the point 16a, and changes from the horizontal state to the vertical state. This rotation is controlled by an upper limit switch (not shown) provided on the upper part of the gantry 1, a lower limit switch (not shown) provided on the lower part, and the control panel 13.

A landing is provided in the middle stage and the uppermost stage of the gantry 1, and the suspending device 2 is provided on the uppermost stage of the stage via a horizontal adjustment mechanism 8.
Is installed.

In the suspending device 2, the center hole jacks 3 are arranged in pairs in the vertical direction by aligning the center positions (FIGS. 8 and 12), and the rotating nuts 4 are arranged above the respective center hole jacks 3. 5 for each screw
To make a lifting mechanism. And four such lifting mechanisms are installed. Here, as shown in FIG. 1, a guide pipe 6 is provided above the lifting mechanism for guiding the protruding screw 5.

On the other hand, the four screws 5 protruding downward are pin-coupled to the reinforcing bar cage holding frame 15. Further, a mechanism provided with a plurality of comb-shaped shavings (projection metal objects) holding means is formed in the lower portion of the reinforcing bar cage holding frame 15, and the mechanism is capable of suspending heavy objects.

The center hole jack 3 uses a hydraulic unit 7 (Fig. 2) as its hydraulic drive source.
The overall operation control is performed by the control panel 10 using a microcomputer. Here, the above-mentioned four sets of lifting mechanisms are adapted to be adjusted in the horizontal direction by the horizontal adjustment mechanism 8 and the hydraulic unit 9.

Below, referring to FIG. 4, FIG. 5 and FIG.
I will explain the procedure of the hanging work.

First, with the rebar cage 14 placed horizontally on the rebar cage support 16, the protrusion metal fittings 17 are installed so as to enter the gaps between the rebars.

Next, operate the winch 12 (Fig. 3) with the control panel 10,
As shown by the arrow R in FIG. 4, the rebar cage support 16 is rotated until the limit switch (which detects the upper limit position) is actuated, and is raised until the vertical state is reached. Then, the suspending device 2 is operated to lower the reinforcing bar cage holding frame 15 to a predetermined setting position of the kanzashi 18, and the kanzashi 18 is set.

After completing the setting, operate the suspending device 2 to rebar cage
Raise 14 a little. After confirming that the edges of the rebar cage 14 and the kanzashi hardware 17 are cut, the rebar cage support 16 is rotated in the direction opposite to the arrow R to restore the original horizontal state.

Next, the suspending device 2 is operated to descend, and the rebar cage 14 'and the rebar cage 14 already erected in the excavation hole are connected by a screw joint. After joining, pull up the rebar cages 14 and 14 'a little and pull out the kanzashi 18'. Then, the plane position and the verticality of the joined rebar cages 14 and 14 'are adjusted, and then the rebar cages 14 and 14' are suspended in the excavation hole by automatic operation.

Next, the rotary nut used in the lifting mechanism of the suspending device 2 will be described.

In FIGS. 9 to 11, the rotating nut 4 is a geared motor for driving to which the sprocket wheel 20 is attached.
19 and a sprocket wheel 21 bolted to the rotary nut 4 are connected via a chain 22 to enable rotation.

The rotating nut 4 and the rotating nut holding frame which does not rotate are connected by a bearing, and a guide roller 23 is provided so that the holding frame does not rotate due to a reaction when the driving geared motor 19 is driven. And
The guide roller 23 is vertically guided by two guide pipes 24. By the action of the guide roller 23, when the geared motor 19 is driven, only the rotating nut rotates, and the entire rotating nut mechanism moves up and down.

As will be described later, the rotating nut mechanism is detected by the upper limit switch 29 and the lower limit switch 28. Further, the center hole jack 3 is detected by the upper limit switch 27 and the lower limit switch 26. In addition, upper and lower limit switch 31 and lower limit switch
The state in which the load is exchanged between the upper center hole jack 3 and the lower center hole jack 3 is detected by 30. Then, the microcomputer (sequencer) which receives the detection signals from these limit switches automatically controls the lifting work by the rotating nut mechanism and the upper and lower center hole jacks 3.

With reference to FIG. 12, the lifting work by the rotating nut mechanism and the upper and lower center hole jacks 3 will be described. In addition,
In FIGS. 12 (A) to 12 (H), the rotating nut to which a load is applied is shown by hatching, and the symbol X is added to facilitate understanding of the movement of the screw 5. It is a reference point.

First, the lifting operation will be described with reference to FIGS. 12 (A) to 12 (D).

As shown in FIG. 12 (A), the lower center hole jack 3'is raised (symbol a), and the lower rotary nut 4 '.
Is slightly pushed up (reference numeral b). Then, the load received by the upper rotary nut 4 indicated by the symbol c is released, and the lower rotary nut 4'is loaded with the load.

Then, as shown in FIG. 12 (B), the lower center hole jack 3'is pushed up (symbol d) and the rotary nut 4'is pushed up (symbol e). When the rotating nut 4'is pushed up, the screw 5 is pushed up (reference numeral f). Then, the center hole jack 3 is lowered several seconds after the center hole jack 3'is raised (reference numeral g).

The rotating nut 4 is rotated and lowered (step h) with a delay of a few seconds from the lowering of the center hole jack 3 shown by reference numeral g.

Next, in FIG. 12 (C), the symbols i, j, k, l, m are
It indicates that the operations indicated by the symbols d, e, f, g, and h are continued.

Further, as shown in FIG. 12 (D), if the center hole jack 3'is stopped at its upper limit (reference numeral n), the rotary nut 4'will be stopped along with the stop (reference numeral o). Then, the screw 5 stops with the stop of the rotating nut 4 '(reference sign p).

On the other hand, if the upper center hole jack 3 is stopped at the upper and lower limits (reference numeral q), the upper rotation nut 4 stops at the lower limit (reference numeral r). Then, the center hole jack 3 on the upper stage is slightly lifted, and the load applied to the rotating nut 4'on the lower stage is transferred to the rotating nut 4 on the upper stage (reference numeral s).

After that, the upper and lower members are reversed and the repeated operation is performed.

By repeating the operation shown in FIGS. 12 (A) to 12 (D) and the operation upside down, the screw 5 rises.

Next, the lowering operation will be described with reference to FIGS. 12 (E) to 12 (H).

First, as shown in FIG. 12 (E), the upper rotation nut 4
Under load, and the lower rotation nut 4 '
Is rotated to raise (reference numeral a '). Next, as indicated by reference sign b ', the lower center hole jack 3 is raised several seconds after the rotation nut 4'has been raised, and the upper center hole jack 3 is lowered almost at the same time as the lower center hole jack 3'is raised. It is started (reference c ').

Along with the lowering of the upper center hole jack, the upper rotating nut 4 is lowered as indicated by reference numeral d ′. As a result, as indicated by the symbol e ', the screw 5 descends as the upper rotary nut 4 descends.

Next, as shown by reference numeral f'in FIG. 12 (F), the lower rotary nut 4'is rotated to be raised. Then, as indicated by the reference sign g ', the lower center hole jack 3'
Raise. Also, the upper center hole jack 3
Is lowered (reference numeral h '). Here, as the upper center hole jack 3 descends, the upper rotary nut 4 descends (symbol i '), and as the upper rotary nut 4 descends, the screw 5 descends (symbol j').

When each member has moved by a predetermined distance, the lower rotation nut 4'is stopped at the upper limit, as indicated by reference numeral k'in FIG. 12 (G). Then, if the lower center hole jack 3'is stopped at the upper limit (reference numeral l ') and the upper center hole jack 3 is stopped at the lower limit (reference numeral m'), the upper center hole jack 3 is stopped and the upper stage is stopped. The rotation nut 4 of FIG. 3 stops (reference numeral n ′), and the screw 5 stops with the stop of the rotation nut 4 of the upper stage (reference numeral o ′).

In this state, as shown in FIG. 12 (H), when the upper center hole jack 3 is lowered again to the lower and lower limits by a certain amount (symbol p ′), the screw 5 is slightly moved as the upper center hole jack 3 is lowered. The quantity drops (reference q '). As the screw 5 is slightly lowered, the load received by the upper rotary nut 4 is transferred to the lower rotary nut 4 ', as indicated by reference sign r'.

After that, the upper and lower members are reversed and the repeated operation is performed.

By repeating the operation shown in FIGS. 12 (E) to 12 (H) and the operation upside down, the screw 5 descends.

FIG. 13 shows a control mechanism used in the above embodiment, in the control mechanism, the lower and lower limit switches 26 for the center hole jack, the upper limit switch 27 for the center hole jack, the lower limit switch 28 for the rotating nut, Upper limit switch for rotating nut 2
9, lower limit switch for center hole jack 3
0, upper limit switch for center hole jack 3
1 is a limit switch support rod 25 as a sensor means.
(Fig. 9). Then, the signals from these sensor means are transmitted to the microcomputer 32 in the control panel 10. On the other hand, the instructions from the upper operation box 34 and the lower operation box 35 are also transmitted to the microcomputer 32.

The control mechanism has a control unit 33 including a magnet switch, a relay, etc., which is connected to a solenoid valve unit 36 for a center hole jack and a solenoid valve 37 for a horizontal adjustment jack to provide a control unit 33. It is configured to operate in response to the command of.

[Effects of the Invention] According to the present invention described above, when the rebar cage is pulled up, 2
Since it is not necessary to perform the hanging work with the crane of the base, the work safety is improved and the work cost is kept low.

Further, since the rebar cages can be continuously suspended, the loss time in the work is reduced and the construction period is shortened.

In addition, when connecting the upper and lower rods of the rebar cage with screws, it is possible to adjust the horizontal position, adjust the verticality, and finely adjust the four corners in the vertical direction. And the effort expended on it is reduced.

Further, since the rebar cage can be installed smoothly in the excavated hole, there is little risk that the hole wall will collapse.

In addition to this, it is possible to use a hydraulic mechanism for the suspending device, and with such a configuration, it is possible to suspend a heavy object, which is suitable for large-scale wall connection work.

[Brief description of drawings]

1 is a front view showing an embodiment of the present invention, FIG. 2 is a plan view of the embodiment, FIG. 3 is a side view of the embodiment, and FIG. 4 is a procedure for suspending a rebar cage. FIG. 5 is an enlarged side view of the portion A of FIG. 4, FIG. 6 is an enlarged front view of the portion A of FIG. 4, and FIG. 7 shows the details of the suspending device. FIG. 8 is a side view, FIG. 8 is a front view thereof, FIG. 9 is an enlarged plan view showing details of the lifting mechanism of the hoisting device, FIG. 10 is an enlarged front view of the same, and FIG. 11 is a rotary nut portion and control limit switch. Fig. 12 is a sectional view showing the mounting position of Fig. 12, Fig. 12 is an explanatory view showing the operation sequence of the lifting mechanism of the lifting device,
FIG. 13 is a block diagram showing a control mechanism in the embodiment shown in FIGS. 1 to 12. 1 ... Stand, 2 ... Suspension device, 10 ... Control panel 14 ... Reinforcing bar cage, 15 ... Reinforcing bar cage holding frame 16 ... Reinforcing bar cage, 17, 18 ... Projection hardware

 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Inventor Hitoshi Matsumura 1-3-15 Awaza, Nishi-ku, Osaka City, Osaka Prefecture Kashima Construction Co., Ltd. Osaka Branch (72) Inventor Masaaki Arakawa 1-3-3 Awaza, Nishi-ku, Osaka City, Osaka Prefecture No.15 Kashima Construction Co., Ltd.Osaka Branch

Claims (1)

[Claims] 1. A raising device, an elevating mechanism, and a protruding metal member including a frame and a reinforcing bar cage on which a reinforcing bar cage is placed and rotated from a horizontal state to a vertical state, and a plurality of protruding metal members holding the reinforcing bar cage. Reinforcing bar cage construction comprising: a rebar basket holding frame provided with a holding means; and a suspending device for automatically suspending the rebar basket, and an adjusting mechanism for adjusting the position of the rebar basket. apparatus.