JP3081151B2 - Pin extraction device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a post-process in which a plurality of used reinforcing bar pins holding a reinforcing bar mat are collectively extracted from a reinforcing bar mat holding jig used in a solidifying process of foamed concrete. The present invention relates to a pin removal device for carrying out to a pin.

[0002]

2. Description of the Related Art Conventionally, in the production process of foamed concrete (ALC) used as a lightweight building material, when a foamed concrete is poured into a mold and solidified, a reinforcing steel mat for reinforcing the foamed concrete is used. It is set in the frame.

Until the foam concrete is solidified to some extent, it is necessary to hold the reinforcing mat so that it does not sink or tilt downward by its own weight in the mold. Fix both ends of the holed clamp, insert a reinforcing pin into the pin support hole formed in the holed clamp, assemble a reinforcing bar mat holding jig, engage the reinforcing bar mat with the lower end of the reinforcing bar pin, and In the suspended state, position and fix the jig frame on the formwork,
The reinforcing bar mat was held in a fixed position in the formwork. Then, after injecting the foamed concrete into the formwork, before the foamed concrete is completely solidified, the reinforcing pin is removed from the reinforcing bar in the foamed concrete, and the reinforcing bar holding jig is separated. Was separated from the clamp with holes and the reinforced pins, and the work of assembling the reinforced mat holding jig was again performed according to the size of the new reinforced mat.

[0004]

The work of separating the rebar pins from the rebar mat holding jig as described above has conventionally been performed by hand, one by one from the clamp with holes, so that the work efficiency is poor. There were also problems with the working environment, such as work safety.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a pin extracting device that can improve the working efficiency by automating the operation of extracting a reinforcing rod pin from a mat holding jig and improve the working environment. .

[0006]

In order to achieve the above object, a pin extracting device according to the present invention collectively includes a flange provided near an upper end of a plurality of rebar pins inserted into a support hole of a clamp with holes. A pair of vertically movable gripping arms that are gripped and pulled out upward, a pair of pin unloading screws that are transported in a state where the flanges of the rebar pins are sandwiched from both sides and suspended, and a gripping arm at a position where the gripping arm can be lifted as far as possible The intermediate portion of the plurality of rebar pins gripped by the pin is received from both sides in a lump, and is moved to both lower sides of the pin unloading screw to move the plurality of rebar pins from the loading side between the two pin unloading screws. And a pair of transfer clamps for passing the pins in a row.

[0007]

After positioning a clamp with holes in which a plurality of rebar pins are inserted into the support holes below a pair of gripping arms, the clamp is lowered in a state where the gripping arms are opened, and provided near the upper ends of the plurality of rebar pins. Then, the gripping arm is raised, and the reinforcing pins are pulled out from the support holes of the clamp with holes.

[0008] At the ascending limit position of the pair of gripping arms, the intermediate portions of the plurality of rebar pins gripped by the gripping arms by the pair of transfer clamps are collectively held from both sides, and then the gripping arms are moved. Open and transfer the rebar pins to the transfer clamp.

Next, the pair of transfer clamps are moved below the pair of unloading screws, and the plurality of reinforcing pins held by the pair of clamps are moved from the loading side between the two pin unloading screws. Infiltrate in a row. When the transfer clamp is opened at a position where all of the rebar pins have entered between the two carry-out screws, the respective rebar pins fall by their own weight, and the respective flange portions are received by the pair of pin transport screws. The plurality of rebar pins transferred onto the pair of pin transport screws are sent to the downstream side in a suspended state by the rotation of the two pin transport screws.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a structure of a reinforcing bar mat holding jig to which the pin extracting device of the present invention is applied, wherein the reinforcing bar mat holding jig is formed in a rectangular frame shape by a mold steel. J is detachably mounted between the long side of the jig frame J by a fixing screw member C1.
In a state where the flange P1 is locked by being inserted from above into a rod-shaped clamp C with holes and a plurality of pin support holes C2 vertically penetrating along the longitudinal direction of the clamp C with holes, And a reinforcing pin P for suspending the M.

The reinforcing bar mat M is assembled by welding a plurality of thin steel bars, and is provided with a reinforcing bar pin connecting portion M1 into which the reinforcing bar pins P are inserted at intervals in the longitudinal direction. The rebar pin connecting portion M1 is composed of an upper plate M2 and a lower plate M3 which are vertically spaced from each other. The upper plate M2 and the lower plate M3 are formed so as to be long in the longitudinal direction of the rebar mat M. The elongated holes M4 and M5 are respectively formed. The reinforcing pin P is provided with a long hole M4 of the upper plate M2 and a
3, the engaging portion P2 is engaged with the long hole M5 of the lower plate M3. The engaging portion P2 has a shape which is brought into an engaged state when the reinforcing pin P is rotated by a predetermined angle after being inserted into the elongated hole M5 of the lower plate M3.

As the engaging portion P2, for example, a long hole M5
A groove is formed on both sides of the long diameter portion, and the engaging portion P2 is turned 90 degrees in the long hole M5 so that the groove engages with the short diameter portion of the long hole M5. Such a shape can be adopted.

In the process of solidifying foam concrete,
Foamed concrete is poured into a formwork (not shown) in a state where the reinforced mat M is suspended by the reinforced mat holding jig having the above structure. When the foamed concrete is in a semi-solidified state, the connection between the reinforced pin P and the reinforced mat M is made. After releasing the joint, the rebar pins P are pulled up together with the jig frame J and pulled out of the mold.

FIG. 2 is a side view of the pin extracting device of the present invention used for extracting the reinforcing pin P from the used mat holding jig. As shown in FIG. Has a lifting frame 3 that is provided above a passage in which a carrier D for collecting the mat holding jig used in the solidification step moves and that is raised and lowered by a lifting cylinder 2. A pair of gripping arms 5 that are opened and closed by an air cylinder 4 are attached to the lifting frame 3.

FIG. 3 is a side view showing a part of the gripping arm 5 at the lower limit position of the lifting frame 3, and FIG. 4 is a cross-sectional view showing an opening / closing mechanism of the gripping arm 5. As shown in the figure, the pair of gripping arms 5 are connected to a pair of gripping portions 5A formed long in the width direction of the transport trolley D, and their lower ends are integrally connected to each other by the gripping portions 5A.
The upper end is constituted by three pairs of swing arm members 5C which are swingably supported on the lower surface of the elevating frame 3 by a pivot 5B.

The air cylinders 4 are installed at two places in the longitudinal direction of the lifting frame 3 and support a lift beam 4A, which is disposed in parallel with the lifting frame 3 and below, so as to move up and down. The lift beam 4A and each swing arm member 5
The intermediate portion of C is connected by a connecting link 4B. When the lift beam 4A moves up and down by the air cylinder 4, the opening and closing operation of each swing arm member 5C is performed via the connecting link 4B. I have.

As shown in FIG. 2, a horizontal guide rail 6 is disposed above the ascending position of the elevating frame 3. The guide rail 6 supports the pin receiving device 8 horizontally moved by the air cylinder 7 so that the pin receiving device 8 can reciprocate between an upper position of a moving path of the carrier D and a lateral position deviated from the moving path. ing.

As shown in FIGS. 2 and 5, the pin receiving device 8 has a pair of vertical frame portions 9A which move across both sides of the lifting frame 3 and the gripping arm 5 raised to the upper limit position. A frame 9 is provided, and a pair of vertical frame portions 9A sandwiches, from both sides, an intermediate portion of a reinforcing rod pin P gripped by the gripping portion 5A of the gripping arm 5 at the ascending limit position of the lifting frame 3, A pair of transfer clamps 10 for receiving from the grip arm 5 are attached.

The pair of transfer clamps 10 are respectively supported by horizontal air cylinders 12 supported by an air cylinder 11 so as to move up and down a small distance with respect to the vertical frame portion 9A. The clamp portion 10A can hold and open the side surface of the intermediate portion of the reinforcing bar pin P. When the clamp portion 10A is in the open position, the lifting frame 3
And the gripping arm 5 can pass vertically between the pair of transfer clamps 10. In addition, the pair of transfer clamps 10 has guide plates 10B that hang down from the respective clamp portions 10A, and lower end sides of the respective guide plates 10B are bent inward to face each other, and face each other. When grasping the rebar pin P, the rebar pin P plays a role of restricting the swing of the rebar pin P. When the guide plate 10B receives the reinforcing pin P from the grip arm 5, if the swing of the reinforcing pin P does not cause a problem,
It is not necessarily required.

When the pin receiving device 8 arrives at a lateral position deviating from the moving route of the carrier D as shown in FIG. 4, the pin receiving device 8 receives the rebar pins P from the pair of transfer clamps 10 and proceeds to a subsequent process. A pair of pin unloading screws 13 for sending out the vertical frame 9A of the horizontal frame 9 at the lateral position.
And is located above the transfer clamp 10 between them.

The pair of pin unloading screws 13 includes:
The rebar pins P are arranged in parallel at an interval that allows the rebar pins P to pass through, and the lower surface of the flange portion P1 of the rebar pins P is engaged with the screw grooves formed in each of them, and the rebar pins P are transported in a suspended state. It is configured to be. When the pin receiving device 8 moves to the pin unloading screw 13 side, the transfer clamp 10 is lifted to the raised position by the air cylinder 11, and the pin unloading screw 13 and
The flange P of the rebar pin P gripped by the transfer clamp 10
1 prevents interference.

Next, the operation of the above-described pin extracting device 1 will be described. The reinforced mat holding jig used in the solidification process of the foamed concrete includes a carrier D as shown in FIG.
Is carried under the gripping arm 5. Then, the carriage D is positioned and stopped so that one clamp C with a hole is located immediately below the gripping portion 5A of the gripping arm 5, and the lifting cylinder 2 is contracted with the gripping arm 5 opened to retract the lifting frame 3. Is lowered, and then the air cylinder 4 is operated to simultaneously hold a large number of the rebar pins P supported by the clamps C with holes by the holding portion 5A, and extend the lifting cylinder 2 again to raise the lifting frame 3. After pulling out the reinforcing pin P upward from the support hole C2 of the holed clamp shown in FIG. 1, it is stopped at the ascending limit position.

In the jig frame J, the tip of the reinforcing rod pin P abuts on the floor surface of the transport trolley D, and the flange P1 of the reinforcing rod pin P and the upper surface of the clamp C with holes as shown in FIG. A gap S between which the gripper 5A can enter is vacant and supported on the carrier D at a height.

On the other hand, by this time, the pin receiving device 8
Reaching above the transport trolley D, the pair of vertical frame portions 9A of the traversing frame 9 of the pin receiving device 8 are located on both outer sides of the pair of gripping arms at the ascending position. The transfer clamp 10 provided on the pair of vertical frame portions 9A is provided with a plurality of rebar pins supported by the gripping portions 5A of the pair of gripping arms 5 at a position moved downward by the air cylinder 11. P is projected from both sides by an air cylinder 12 to an intermediate portion of P, and these reinforcing pins P are clamped by their clamp portions 10A.
And collectively.

Next, the gripping arm 5 is released by the air cylinder 4, and the rebar pin P is transferred from the gripping portion 5A to the transfer clamp 10. When the transfer clamp 10 receives the reinforcing rod pin P, the air cylinder 11 operates to move the transfer clamp 10 upward by a small distance, and the flange P1 of the reinforcing rod pin P gripped by the transfer clamp 10 is moved.
Is positioned higher than the pair of pin unloading screws 13, and then the pin receiving device 8 is moved to a position where the pair of pin unloading screws 13 enters between the vertical frame portions 9 </ b> A of the traversing frame 9. At this time, the plurality of rebar pins P gripped from both sides by the pair of transfer clamps 10 of the pin receiving device 8 enter between the two pin unloading screws 13 from the loading side.

When all the rebar pins P gripped by the pair of transfer clamps 10 enter between the pair of pin unloading screws 13, the air cylinder 12 is operated to transfer the pair of transfer clamps 10. When the clamp 10 is released, each of the rebar pins P falls by its own weight, and a flange portion P is supported on the upper surface of a pair of pin unloading screws 13 that are rotationally driven. At the downstream end, it is delivered to another conveyor (not shown) and conveyed to a desired place.

On the other hand, when the work of removing the rebar pins P from one clamp C with holes fixed to the jig frame J mounted thereon is completed, the rear clamp C with holes is pulled out. The pin removing device 1 moves so as to be located directly below the device 1, and the pin removing operation described above is repeated again.

When the work of extracting the reinforcing rod pins P from all the clamps C with holes on the jig frame J is completed in this way, the transporting trolley D removes the clamp C with holes from the jig frame J. It is carried out to the next step, another carriage carrying the mat holding jig used in the concrete solidification step is newly carried in below the pin extracting device 1, and the same operation is repeated.

In this embodiment, the movable clamp 10 is configured to be vertically moved by a small distance with respect to the vertical frame portion 9A of the horizontal frame 9 by the air cylinder 11, but the air cylinder 11 is omitted. You may. In that case,
It is necessary to set the position of the flange P1 of the rebar pin P gripped by the gripping arm 5 at the ascending limit position of the lifting frame 3 above the upper surface of the unloading screw 13. Further, the gripping mechanism of the gripping arm or the moving clamp used in the pin extracting device of the present invention is not limited to the configuration described in the above-described embodiment, and has a function of gripping the flange portion and the intermediate portion of the rebar pin. What is necessary is just to have.

[0030]

As described above, according to the pin extracting device of the present invention, the operation of extracting the reinforcing pin from the reinforcing mat holding jig recovered from the solidification process of the foamed concrete, which has been conventionally performed manually, Since the rebar pins can be automatically sent to the next step by performing the operation in units of clamps with holes and collectively, the working efficiency can be improved and the working environment can be improved.

[Brief description of the drawings]

FIG. 1 is a perspective view of a mat holding jig to which a pin extracting device according to the present invention is applied.

FIG. 2 is a side view showing one embodiment of the pin extracting device of the present invention.

FIG. 3 is a side view showing a part of a gripping arm in the pin extracting device of the present invention.

FIG. 4 is a cross-sectional view showing an opening and closing mechanism of a gripping arm in the pin extracting device of the present invention.

FIG. 5 is a sectional view taken along line AA of FIG. 2;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Pin removal device 2 Lifting cylinder 3 Lifting frame 4 Air cylinder 4A Lift beam 4B Connecting link 5 Holding arm 5A Holding portion 5B Pivot 5C Swing arm member 6 Guide rail 7 Air cylinder 8 Pin receiving device 9 Horizontal frame 9A Vertical frame 10 Transfer clamp 10A Clamp section 10B Guide plate 11 Air cylinder 12 Air cylinder 13 Pin transport screw

Claims (1)

(57) [Claims] 1. A pair of vertically movable gripping arms for simultaneously gripping and pulling upwardly a flange provided near an upper end of a plurality of rebar pins inserted through a support hole of a clamp with holes, and a rebar pin. A pair of pin unloading screws that are transported in a state of being suspended with both flanges sandwiched from both sides, and an intermediate portion of a plurality of rebar pins gripped by the gripping arm at the ascending limit position of the gripping arm from both sides. And a pair of transfer clamps that receive the package in a lump, move below the pin unloading screw, and allow the plurality of rebar pins to enter and be transferred in a row from the loading side between the two pin unloading screws. A pin removing device characterized by the above-mentioned.