JP2833336B2 - Lifting and transporting device for lattice reinforcing bars - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lifting and conveying device for a lattice-shaped reinforcing bar capable of lifting and holding a plurality of lattice-shaped reinforcing bars in a stacked state and detaching them one by one at a corresponding moving place.

[0002]

2. Description of the Related Art A grid-shaped reinforcing bar used as a reinforcing bar of a slab has a weight of 50 to 200 kg per sheet. Conventionally, a plurality of reinforcing bars lifted and conveyed on a slab of a predetermined floor are stocked in a stacked state. People carry it in place or
A method has been adopted in which a crane is transported and installed one by one to a predetermined place.

[0003] In any of the methods, the grid-like rebar can be transported only one by one, so that the transport and installation work takes time. On the other hand, there has been developed an apparatus for lifting a plurality of lattice-shaped reinforcing bars at a time and installing them one by one in a predetermined place from the bottom.

[0004] As this lifting and conveying apparatus, there is a technique disclosed in, for example, JP-A-1-317919. In this technique, a grid-shaped reinforcing bar is sandwiched between two rods suspended from the four corners of the horizontal frame, and a pair of upper and lower rotating claws provided at the lower part of the rods are alternately opened and closed to sequentially form a grid. When the rebar is taken in between the rods, and when the rebar is lowered, the rotating claws are alternately opened and closed to lower the rebar in order from the bottom.

[0005]

However, in this lifting and conveying apparatus, locking and unlocking by rotating pawls at each stage are required.
Since the unlock operation is performed separately and manually at four places,
The operation is troublesome, and on the one hand, there is a fear that while only one card is taken in, on the other hand, a plurality of cards are taken in, and the operation involves uncertainty.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described drawbacks, and has as its object to automatically and surely lift one by one a lattice-shaped reinforcing bar by remote control and hold it in a stacked state. The present invention is to provide a lattice-shaped rebar lifting and conveying device which can be automatically lowered from a lower portion at a predetermined position.

[0007]

In order to achieve the above-mentioned object, the present invention hangs on a crane and has
A horizontal frame on which only the hanging tools for lifting
A lifting and conveying device for a grid-shaped reinforcing bar provided, wherein each of the hanging tools has a width dimension smaller than the distance between the grids.
A chain belt that is penetrated between the lattices and is suspended endlessly between a pair of upper and lower gears, and protrudes from the outer periphery of the chain belt in a state inclined in one direction to support intersecting reinforcing bars. A remote control unit comprising a large number of locking claws and a motor for driving the gears is provided, and the motors are simultaneously driven at four locations in forward and reverse directions.

[0008]

According to the above construction, by rotating the motor in four forward directions simultaneously, the reinforcing bars intersecting with the respective locking claws are sequentially raised while being hooked, and are supported by the respective claws. The plurality of lattice-shaped reinforcing bars can be held in a stacked state. Motor 1
By simultaneously reversing the four points for each stroke, the nails are sequentially detached from the claw from the bottom, so that the sheets can be lowered one by one.

[0009]

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 shows a lifting and conveying apparatus for a lattice-shaped reinforcing bar according to the present invention. An overhead traveling crane 1 is disposed in a temporary state on a ceiling of a predetermined floor, and a hoist 2 that can travel along the width direction of the crane 1 is disposed below the crane 1. On a crane hook 2a of the hoist 2, a horizontal frame 3 is suspended so as to be movable in three-dimensional directions of height and width.

At the lower part of the four corners of the horizontal frame 3, as shown in FIG. 2, suspenders 5 are vertically suspended via a vertical frame 4, and each of the suspenders 5 vertically connects a plurality of lattice-shaped reinforcing bars 6. It is penetrated and held in a laminated state. The lattice-shaped rebar 6 is a flat rectangular shape having a length of about 5 m and a width of about 2.4 m, and rebars 6 a are assembled in a vertical and horizontal lattice, and the suspending tool 5 is fitted in each lattice in which the rebars 6 a are assembled. The width and the thickness are set to about the same.

At the center of the horizontal frame 3, a control box 7 for controlling the driving of each of the hanging members 5 is arranged, and the control box 7 has a control code 8a.
Is connected to a remote control hand switch 8 which also serves as a drive control for the crane 1.

FIGS. 3 (a) and 3 (b) show a detailed structure of each of the hanging members 5, and the hanging member 5 is composed of a pair of upper and lower sprocket gears 9 supported below the vertical frame 4, and a sprocket gear 9. A chain belt 10 suspended between them, locking claw portions 11 arranged at an appropriate interval on the outer periphery of the chain belt 10 so as to protrude therefrom, and a forward / reverse driving shaft connected to the upper gear 9. And a motor 12.

Each of the claws 11 is arranged in an inclined state in one direction, and the inclined inner side is used as a support surface of the reinforcing bar 6a intersecting the inclined side. Therefore, in the figure, the right side inclines upward, and the left side inclines downward. The width D1 between the left and right claws 11 is set slightly smaller than the lattice spacing D2 of the reinforcing bar 6a.

Next, a description will be given of the work of transporting the lattice-shaped rebar 6 using the lifting and transporting apparatus having the above configuration. First, the horizontal frame 3 is placed on the upper part of the grid-shaped reinforcing bar 6 placed in a stacked state at the standby position.
When the hoist 2 is driven to lower the horizontal frame, the tip of the hanging tool 5 enters between the lattices of the uppermost lattice-shaped reinforcing bar 6. In this state, the claw 11 inclined upward is shifted to one side between the lattices, and when the motors 12 are simultaneously driven forward for one stroke, the claw 11 at the lowermost end is raised, and the inclined upper inner side is raised. The supporting member 6a is lifted in a state where the reinforcing bar 6a intersects the supporting member 6a. This state occurs at four places at a time, and the uppermost grid-like reinforcing bar 6 is held at the lower part of the horizontal frame 3 while maintaining a horizontal state.

Next, when the motor 12 is sequentially driven forward while the horizontal frame 3 is lowered, the crossed reinforcing bar 6a is supported inside the upper portion of the claw portion 11 which rises for each stroke.

The motor 12 is stopped when the claw portion 11 supporting the first lattice-shaped reinforcing bar 6 is at the uppermost position in the horizontal state, and the horizontal frame 3 is moved upward to lower the horizontal frame 3 as shown in FIG. As shown in FIG. 7, a plurality of lattice reinforcing bars 6 are held in a stacked state.

Next, when the crane 1 is run and reaches a predetermined position on the slab surface, the horizontal frame 3 is lowered to make the lowermost lattice reinforcing bar 6 face the predetermined position on the slab surface, and then the descent is stopped. If the motors 14 are simultaneously driven in reverse for one stroke in this state, the horizontal claw portion 11 located at the lowermost position moves to the vertical position, and as a result, the reinforcing bar 6a is detached from the claw portion 11. Then, only the lowermost lattice reinforcing bar 6 is transferred to the slab surface.

After the installation work is completed, the horizontal frame 3 is raised again, moved to another place, and the same distribution installation work as described above is performed. This work is repeated for the number of the grid-shaped reinforcing bars 6 held, and after all of the work is distributed, the work is moved to the standby position again, and the lifting work and the distribution work are repeated.

The number of lifting of the reinforcing bars 6 is determined according to the length of the lifting tool 5 and the number of claws, but about 5 to 10 pieces are appropriate according to the weight. The lattice reinforcing bar 6 can be sequentially distributed to 10 to 10 places.

The pieces constituting the horizontal frame 3 can be swallowed and moved in the horizontal direction.
.. Can be adjusted by adjusting the swallowing amount of each piece and inserting the pin 3b into the through hole 3a again to obtain an arbitrary vertical and horizontal dimension.

[0021]

As explained in detail in the above embodiments, in the lifting and conveying apparatus for a lattice-shaped reinforcing bar according to the present invention, the motors only need to be simultaneously rotated forward at four locations for each stroke, so that each member can be rotated. The lattice-shaped reinforcing bars are sequentially raised while being hooked on the stopping claws, are supported by the locking claws, and the plurality of lattice-shaped reinforcing bars can be held in a stacked state. The only reversing at once four positions of the motor for each stroke, it is possible to down from the lower one by one away from the claw portion in order, yet control is simple, the operation and dispensing operation lifting as compared with the conventional There is an advantage that it can be performed automatically and reliably by remote control of one worker, and it is suitable for labor saving and automation of this kind of work.

[Brief description of the drawings]

FIG. 1 is an explanatory front view showing the entire configuration of a lattice-shaped reinforcing bar lifting and conveying apparatus according to the present invention.

FIG. 2 is a perspective view of the same.

FIG. 3A is a side view of a lifting device of the lifting and conveying device. (B) is the same front view.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Crane 2 Hoist 2a Crane hook 3 Horizontal frame 5 Hanging tool 6 Lattice bar 6a Rebar 8 Hand switch (remote control unit) 9 Sprocket gear (upper gear, lower gear) 10 Chain belt 11 Locking claws 12 Correct Reverse drive motor

────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Ritsuo Matsumura 2-3-3 Kandaji-cho, Chiyoda-ku, Tokyo Obayashi Corporation Tokyo Head Office (56) References JP-A-1-317919 (JP, A) JP-A Sho 52-61066 (JP, A) (58) Field surveyed (Int. Cl. ⁶ , DB name) B66C 1/00-1/68

Claims (1)

(57) [Claims] 1. Hanged by a crane , a case
A horizontal frame with only hanging members for lifting the reinforcing steel bars is provided.
A lifting and conveying device for the grid-shaped reinforcing bar, wherein each of the lifting devices has a width dimension smaller than the distance between the grids.
A chain belt that is penetrated between the lattices and is suspended endlessly between a pair of upper and lower gears, and protrudes from the outer periphery of the chain belt in a state inclined in one direction to support intersecting reinforcing bars. A lifting / conveying device for a lattice-shaped reinforcing bar, comprising a plurality of locking claws and a motor for driving the gear, and a remote control unit for driving the motors in four forward and reverse directions simultaneously at four locations.