JPH0679939B2 - Lifting distribution tool for rebar grid - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a construction work or the like, in which one or more mesh reinforcements or welded reinforcing steel lattices are stacked and hung up, and one at a predetermined position from the bottom. TECHNICAL FIELD The present invention relates to a lifting and distributing tool for a reinforcing bar lattice that can be separated and detached by using.

[Conventional technology]

The required number of prefabricated reinforcing bars assembled in a grid pattern such as mesh reinforcing bars and reinforcing bar welding grids are stacked and stacked, and in this stacked state they are loaded onto a slab on the working floor, and thereafter 1
Alternatively, every few sheets are manually carried and arranged to a predetermined position.

This can be done by hanging a wire with a crane or the like while stacking the reinforcing bars using a crane, but if you do not temporarily put it on the slab with the bundle as it is, part of it Because it cannot be taken out.

[Problems to be Solved by the Invention] However, in some of the grid-shaped reinforcing bars, the weight of one piece is close to 200 kg, and there are many obstacles on the slab during transportation, which causes many problems in the construction process. It was

The object of the present invention is to eliminate the inconvenience of the conventional example, to bear the weight of the reinforcing bar, and to hang the stacked reinforcing bars as a bundle, and yet to pay out only a part of them. The purpose of the present invention is to provide a lifting and distributing tool for a reinforcing bar lattice, which has a simple structure, is inexpensive, can greatly reduce the time and labor, and can perform safe work.

[Means for Solving the Problems]

In order to achieve the above-mentioned object, the present invention inserts a rod in a through hole formed in an upper part so as to be slidable in a horizontal direction, and connects two long vertical rods so that their mutual intervals can be adjusted. A suspension hole is formed in the upper part of one of the vertical rods, and a backing plate is projected on both sides of the lower end.On the other hand, an arm that can be rotated by a lever is provided on the upper part of the other vertical rod, and a lock mechanism is provided at the lower end. Rotating pawls provided at small intervals in the upper and lower two stages are provided so that the tips of the rotating pawls are brought into contact with the abutting plate so that the lower ends of the two vertical rods can be closed, and the rotating pawls can always be locked. The gist of the invention is to urge the spring to pull downward and to connect the arm and the rotating claw with a wire.

[Action]

According to the present invention, since the vertical rod is long, it is possible to sandwich a plurality of overlapping reinforcing bar lattices at a time, and the distance between the two vertical rods can be adjusted by the insertion length of the rod. Can be inserted according to the diameter of the reinforcing bar.

Then, if the vertical rods are brought close to each other so that the reinforcing bar lattice is housed in between and the tip ends of the rods are locked by the rotating claws, the reinforcing bar lattice cannot be pulled out. If the crane hook or the like is hooked up in the hanging hole on the upper part of the rod as it is, the rebar lattice can be lifted while the lower one and the one above it are hooked by the rotating claws.

The pivoting claw as the locking mechanism has its tip abutted against the backing plate to close the space between the lower ends of the two vertical rods, and thus is a strong locking mechanism capable of withstanding the weight of the reinforcing bar. Further, a spring that pulls downward is urged to the rotating pawl so that the locked state is always maintained.

In the rebar grid lifted in this way, only the bottom rebar grid can be retracted by retracting only the bottom revolving claw with the top revolving claw still hooking the rebar grid one sheet above the bottom. It can be left in place.

〔Example〕

 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a side view showing an embodiment of a lifting and distributing tool for a reinforcing bar grid according to the present invention. In the figure, 1 is a vertical rod in which a connecting circular rod 3 having an enlarged end 3a is horizontally projected from the upper part. is there.

The rod 3 is slidably inserted in a horizontal direction in a through hole 4 formed in an upper portion, and the vertical rod 2 is attached to the vertical rod 1 so that the mutual interval can be adjusted.

A hanging hole 5 is provided above the through hole 4 of the vertical rod 2.
Is formed, and the contact plates 6 and 7 are projectingly provided on both sides of the lower end.

On the other hand, the vertical rod 1 is provided with a horizontal base plate 8 at the upper end position above the connecting portion of the rod 3, and as shown in FIG. 4, cam type arms 9 and 10 are arranged in parallel on the base plate 8. Mount freely. The operating levers 11 and 11 'are raised from the arms 9 and 10 and the operating wires are attached to the ends of the arms 9 and 10 protruding from the base plate 8.
Join one end of 12.

In the figure, 14 is a bracket for mounting the arms 9 and 10, 13 is a pin, and 15 and 15 'are joint fittings for connecting the arms 9 and 10 to the wire 12, which are pins 16 and 1.
Use 6'to rotatably attach to arms 9 and 10. Also, the arm 9,1
Immediately below 0, stoppers 17 and 17 'whose height can be adjusted by a screw mechanism are provided on the base plate 8.

Further, on the lower end of the vertical rod 1, there are provided locking and adjusting rotary claws 18 and 19 as a lock mechanism, and the tips thereof are contact plates 6 and 7 of the vertical rod 2.
The vertical rods 1 and 2 are attached at a small interval so that they abut each other and close the space between the tips of the vertical rods 1 and 2.

Then, the lower ends of the wires 12 are respectively attached to the rotating claws 1
The rotation pawls 18 and 19 are connected to 8, and the rotation pawls 18 and 19 are pulled downward by a spring 24 so that they can be locked at all times.

On the other hand, two guide plates 20 are provided in parallel in the middle of the vertical rod 1 so that the vertical rod 2 can be accommodated therein.

Next, a lifting and distributing construction method performed using such a tool will be described.

FIG. 5 is a perspective view showing a use state, and the distribution tool of the present invention is, for example, a mesh bar or a reinforcing bar grid 22 such as a welded bar grid.
It is used by suspending it at the four corners of the frame (suspension jig) 21 adjusted to the size.

Due to land transportation, the reinforcing bar grid 22 is limited in both width and length. Especially, the width is limited to 2,500 mm. There is no particular restriction on the length, but it is easy to handle 5,
The limit is about 000 mm. Therefore, the frame 21 for lifting is also within this size.

The frame body 21 in which the four distribution tools of the present invention are attached to the crane hook 23 is moved onto the bundle of stacked reinforcing bar lattices 22.

As shown in FIG. 6, the vertical rod 2 is slid along the rod 3 to maximize the distance between the vertical rods 1 and 2. In this case, the operation levers 11 and 11 'are erected, and the rotating claws 18 and 19 are housed on the vertical rod 1 side.

The reinforcing rod lattice 22 is housed between the vertical rods 1 and 2 thus expanded, and as shown in FIG. 7, the vertical rod 2 is pushed to narrow the space between the rods 1 and 2 to the extent that the reinforcing rod lattice 22 touches.

Then, if the lever 11 is tilted as shown in FIG.
When 12 is loosened, the lower part of the rotary claw 18 for fixing is rotated by the spring 24 to close the space between the tips of the vertical rods 1 and 2, and the claw 18 is applied to the lowermost reinforcing bar lattice 22.

Then, if the lever 11 'is tilted, the wire 12 is similarly loosened, and the rotating claw 19 for adjustment is rotated by the spring 24 as shown in FIG. 9 so that the lowermost reinforcing bar grid 22 and the reinforcing bar grid one above it.
It is inserted between 22 and locked.

In this way, after being locked by the both rotating claws 18 and 19, the whole is lifted and moved to the payout position by the crane.

Next, the distribution work (dispensing work) is started. When the lever 11 is erected as shown in FIG. 10 when it reaches a predetermined position, the wire 12 is pulled and the turning claw 18 is set on the vertical rod 1 side and the lock is released. Then, only the lowermost reinforced grid 22 is paid out.

Then, the lever 11 is tilted down again to lock the turning claw 18 (see FIG. 11), and then the lever 11 'is erected to turn the turning claw 19.
When the lock is released, the bundle of rebar lattices 22 falls to the rotating claw 18 as shown in FIG.

In this state, the lever 11 'is tilted down again, and as shown in FIG. 13, the rotating claw 19 is moved to the bottom rebar lattice 22 and the rebar lattice one step above.
It locks so as to be inserted between the reinforcing bars 22 and 22, and separates only the lowermost reinforcing bar lattice 22 from the bundle of other reinforcing bar lattices 22. After that, the same process is repeated, and the lowermost reinforcing bar lattices 22 are dispensed one by one.

〔The invention's effect〕

As described above, the lifting and distributing tool for the reinforcing bar grid of the present invention uses the rotating claw with a simple structure of wire and lever operation, and stacks one or several reinforcing bar grids such as mesh bars and welded bar grids. Since it can be lifted as it is and separated from the lower layer one by one at a predetermined position, separated and removed, it can be arranged, so the cost is lower than the conventional one, and it is possible to greatly reduce the time and labor. It is possible to obtain the safety work.

In addition, since the rotating claw as a lock mechanism closes the space between the lower ends of the two vertical rods by abutting the tips of the rotating claws on the contact plate, it becomes a strong locking mechanism that can withstand the weight of the reinforcing bar and is safe. The reliability and certainty can be improved.

[Brief description of drawings]

FIG. 1 is a side view showing an embodiment of a lifting and distributing tool for a reinforcing bar lattice of the present invention, FIG. 2 is a view taken along the line A of FIG. 1, FIG. 3 is a view taken along the line B of the same, and FIG. Is a view from the same line as the arrow C, FIG. 5 is a perspective view showing a use state, and FIGS. 6 to 13 are side views showing each step of the construction method using the lifting distribution tool for the reinforcing bar lattice of the present invention. 1,2 ...... Vertical rod, 3 ...... Rod 4 ...... Through hole, 5 ...... Suspension hole 6, 7 ...... Pad plate, 8 ...... Base plate 9, 10 ...... Arm, 11, 11 '...... Operating lever 12 …… Wire, 13,16,16 ′ …… Pin 14 …… Bracket, 15,15 ′ …… Joint fitting 17,17 ′ …… Stopper, 18,19 …… Rotating claw 20 …… Guide plate , 21 …… Frame 22 …… Reinforcing grid, 23 …… Crane hook 24 …… Spring

 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Inventor Yukio Ichihara 1-2-7 Moto-Akasaka, Minato-ku, Tokyo Kashima Construction Co., Ltd. (72) Tsutomu Kumazawa 1-2-7 Moto-Akasaka, Minato-ku, Tokyo No. Kashima Construction Co., Ltd. (72) Toru Kashiwakura Inventor Toru Kashiwakura 678 Umezawa-cho, Tochigi City, Tochigi Prefecture Fuji Steel Industry Co., Ltd. (56) References JP-A-61-130198 (JP, A) JP-A-51-48172 (JP, A) JP-B-58-51193 (JP, B2)

Claims (1)

[Claims] 1. A rod is slidably inserted in a through hole formed in an upper part in a horizontal direction so that two long vertical rods are connected to each other so that the distance between them can be adjusted, and one of these vertical rods is connected. Form a hanging hole on the upper part, and project a backing plate on both sides of the lower end,
An arm that rotates with a lever is provided on the upper part of the other vertical rod,
Further, a rotating claw provided as a lock mechanism at a small interval of two steps up and down is provided at the lower end so as to be able to close the space between the lower ends of the two vertical rods by abutting the tips of the rotating claws, respectively. In addition, a lifting and distributing tool for a reinforcing bar lattice is characterized in that a spring for pulling downward is urged so that a locked state can be obtained at all times, and the arm and the rotating claw are connected by a wire.