JPH05330779A - Lifting carrier device of lattice reinforcement - Google Patents

Abstract

PURPOSE:To automatically lower lattice reinforcements layered by remote control from the lower part at a predetermined position in order from the lower part by automatically and surely suspending one by one to hold them in a layered condition. CONSTITUTION:A horizontal frame 3 is suspended below a crane. A hoisting accessories 5 are hung below the four corners of the horizontal frame 3 through a vertical frame 4. A driving motor 7 of each hoisting accessory 5 is arranged in the center of the horizontal frame 3. The hoisting accessory 5 comprises a vertical part of sprocket gears 9 received by a bearing below the vertical frame 4, a chain belt 10 suspended between the sprocket gears 9, and engagement claw parts 11 arranged in a protruded condition at a proper distance on the outer periphery of the chain belt 10. The upper part of the gear 9 of the hoisting accessories 5 are linked with a motor 7 through a power transmission mechanism.

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 apparatus for a grid-shaped reinforcing bar, which holds a plurality of grid-shaped reinforcing bars in a stacked state and allows them to be separated one after another at a corresponding moving place.

[0002]

2. Description of the Related Art A grid-like reinforcing bar used as a reinforcing bar for a slab has a weight of 50 to 200 kg per piece. Conventionally, a plurality of reinforcing bars that have been lifted and transported on a slab on a predetermined floor are stacked and stacked. There has been a method in which a person manually carries it to a predetermined position, or a crane is used to convey and install the sheets one by one at a predetermined place.

Whichever method is used, since the grid-shaped reinforcing bars can be transported only one by one, the transportation and installation work take time. On the other hand, a device for suspending a plurality of grid-shaped reinforcing bars at one time and installing them one by one from a lower part at a predetermined place has been developed.

An example of this hoisting and conveying apparatus is disclosed in Japanese Patent Laid-Open No. 1-317919. In this technology, a grid-like reinforcing bar is sandwiched between two rods hanging at the four corners of the horizontal frame, and a pair of rotating claws provided at the bottom of the rod are alternately operated to sequentially move the grid-like reinforcing bar. When the rods are taken in between the rods and when they are lowered, the rotating claws are operated alternately to lower the reinforcing bars in order from the bottom.

[0005]

However, in this hoisting and conveying apparatus, the locking by the rotating claws at each stage,
Unlocking is performed separately at 4 locations, so it takes time to operate, and there is a fear that one side will take in only one piece, but the other side will take in several pieces, so the operation is uncertain. It was accompanied by sex.

The present invention has been made in view of the above-mentioned drawbacks, and an object thereof is to automatically and reliably lift each of the lattice-shaped reinforcing bars piled up by remote control and hold them in a laminated state. The present invention provides a lifting and transporting device for lattice-shaped reinforcing bars, which can be automatically lowered in order from a lower part at a predetermined position.

[0007]

In order to achieve the above-mentioned object, the present invention comprises a horizontal frame suspended by a crane, and suspensions suspended from the four lower corners of the horizontal frame. A chain belt suspended endlessly between a pair of upper and lower gears, a plurality of locking claw portions that are provided on the outer periphery of the chain belt and project in a state inclined in one direction, and that support intersecting reinforcing bars, A drive motor that is installed on a horizontal frame and rotationally drives an upper gear of the suspension via a power transmission mechanism;
And a remote control unit for driving the motor in the forward and reverse directions.

[0008]

According to the above structure, by driving one motor, the upper gear of the suspender rotates forward and backward through the power transmission mechanism. By rotating the upper gear in the forward direction for each stroke, the reinforcing bars intersecting with the locking claws are gradually raised while being supported by the claws, and a plurality of lattice-shaped reinforcing bars are stacked. Can be held at 1 upper gear
By reversing for each stroke, the claws are separated from the lower part in order, so that they can be lowered one by one.

[0009]

Embodiments of the present invention will be described below in detail with reference to the drawings. 1 to 4 show a first embodiment of a lifting and conveying apparatus for lattice-shaped reinforcing bars according to the present invention.

In FIG. 1, an overhead traveling crane 1 is tentatively arranged on a ceiling portion of a predetermined floor, and a hoist 2 capable of traveling along the width direction of the crane 1 is arranged below the crane 1. .. A horizontal frame 3 is suspended on a crane hook 2a of the hoist 2 so as to be movable in three-dimensional directions of vertical and horizontal heights.

At the lower portions of the four corners of the horizontal frame 3, as shown in FIG. 2, hanging members 5 are hung vertically via a vertical frame 4, and each hanging member 5 has a plurality of grid-shaped reinforcing bars 6 arranged vertically. It penetrates and holds in a laminated state. The grid-shaped reinforcing bar 6 is a flat plate rectangular shape having a length of about 5 m and a width of about 2.4 m, and the reinforcing bars 6a are assembled in a vertical-horizontal grid pattern. The suspending tool 5 is fitted in each grid in which the reinforcing bars 6a are assembled. The width and thickness are set to some extent.

At the center of the horizontal frame 3, a drive motor 7 for each lifting device 5 is arranged, and the drive motor 7 also has a hand switch 8 for remote control which also serves as drive control of the crane 1 via a control code 8a. It is connected to the.

On the left and right sides of the drive motor 7, intermediate shafts 9 forming a power transmission mechanism are arranged on both sides of the upper portion of the horizontal frame 3, and the forward and reverse rotational power of the motor 7 is applied to the suspensions 5 via the intermediate shafts 9. It is transmitted.

The power transmission mechanism is, as shown in FIGS. 2 and 3, a pair of sprockets 10 provided on the output shaft of the motor 7.
And sprockets 11 and 12 pivotally supported by the intermediate shaft 9,
It has a structure in which chains 15 and 16 are suspended between an upper gear of the hanging tool 5 and a coaxial sprocket 14, respectively.

FIGS. 4 (a) and 4 (b) show the detailed structure of each suspension 5, which is a pair of upper and lower sprocket gears (upper side gear and lower side gear) supported on the lower portion of the vertical frame 4. As shown in FIG. Gear) 17, the chain belt 18 suspended between the sprocket gears 17, and the chain belt 18
And an engaging claw portion 19 arranged in a projecting state at regular intervals on the outer periphery of the sprocket. The sprocket 14, which is the final stage of the power transmission mechanism, is coaxially arranged on the upper gear 17. , Is connected to the intermediate shaft 9 via a chain 16.

The claws 19 are arranged in a slanted state in one direction, and the slanted inner side serves as a supporting surface for the reinforcing bars 6a intersecting with the slanted inner side. Therefore, in the figure, the right side inclines upward, and the left side inclines downward. The width D1 between the left and right claw portions 19 is set to be slightly smaller than the lattice spacing D2 of the reinforcing bars 6a.

Next, the work of carrying the grid-shaped reinforcing bars 6 using the lifting and carrying device having the above-mentioned structure will be described. First, the horizontal frame 3 is placed on top of the lattice-shaped reinforcing bars 6 placed in a stacked state at the standby position.
Is moved and 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, when the claw portion 19 tilted to the upper side is moved closer to one side between the lattices and the motor 7 is driven in the forward direction for one stroke, the claw portion 19 at the lowermost end is lifted, and the claw portion 19 at the bottom of the claw 19 is moved upward. The crossed reinforcing bars 6a are lifted while being supported. This state occurs at four places at once, and the uppermost lattice-shaped reinforcing bar 6 is held in the lower part of the horizontal frame 3 in a horizontal state.

Next, when the horizontal frame 3 is lowered and the motor 7 is sequentially driven in the forward direction, the crossed reinforcing bars 6a are supported inside the upper portion of the rising claw portion 19 for each stroke.

The motor 7 is stopped when the claw portion 19 supporting the first lattice-shaped reinforcing bar 6 reaches the uppermost position in the horizontal state,
By raising the horizontal frame 3 this time, a plurality of grid-shaped reinforcing bars 6 are held in a laminated state under the horizontal frame 3 as shown in FIG.

Next, when the crane 1 is run to reach a predetermined position on the slab surface, the horizontal frame 3 is lowered so that the lowermost lattice-shaped reinforcing bar 6 faces the predetermined position on the slab surface, and then the lowering is stopped. When the motor 7 is reversely driven by one stroke in this state, the lowermost horizontal claw portion 19 moves to the vertical position side, and as a result, the reinforcing bar 6a is detached from the claw portion 19 and Only the grid-shaped reinforcing bars 6 of 6 will be transferred to the slab surface.

After the installation work is completed, the horizontal frame 3 is raised again and moved to another place to perform the distribution installation work similar to the above. This operation is repeated by the number of the grid-shaped reinforcing bars 6 held, and after all the pieces are distributed, they are moved to the standby position again, and the lifting operation and the distributing operation are repeated.

The number of the grid-shaped reinforcing bars 6 to be hung up is determined depending on the length of the hanging tool 5 and the number of claws, but about 5 to 10 pieces are appropriate depending on the weight, and once lifted, it is 5 The grid-shaped reinforcing bars 6 can be sequentially distributed to 10 places.

FIG. 5 shows a modification of the first embodiment, in which the upper gear 17 of the hanger 5 projects above the horizontal frame 3 and is directly connected to the intermediate shaft 9. In this example, since the sprocket 14 and the chain 16 at the final stage can be omitted, the mechanism is simplified.

6 and 7 show a second embodiment of the present invention. In the figure, the power transmission mechanism includes a first intermediate shaft 20 that is supported on the upper portion of the horizontal frame 3 in parallel with the motor 7,
A second intermediate shaft 21 which is orthogonal to the intermediate shaft 20 and is supported on both upper sides of the horizontal frame 3 is provided. The motor 7 and the first intermediate shaft 20 are rotationally transmitted via a plurality of spur gears 22. Rotation is transmitted between both sides of the intermediate shaft 20 and the second intermediate shaft 21 via a bevel gear 23. Further, the rotation of the second intermediate shaft 21 and the upper gear 17 of the suspension 5 is transmitted via the sprockets 12 and 14 and the chain 16 as in the above-described embodiment.

Also in this embodiment, as shown in FIG. 5, the second intermediate shaft 21 may be directly connected to the upper gear 17.

[0026]

As described above in detail with reference to the respective embodiments, in the lifting and conveying apparatus for the lattice-shaped reinforcing bars according to the present invention, the upper gears are rotated in the forward direction for each stroke to lock the respective gears. It is possible to hold a plurality of grid-shaped reinforcing bars in a stacked state by being supported by each locking claw while sequentially rising in a state where the grid-shaped reinforcing bars are caught by the working claws. Also, set the upper gear to 1
By reversing each stroke, it is possible to lower the claws one by one from the bottom and lower them one by one.Therefore, the lifting operation and distribution work can be performed automatically and reliably by remote control of one worker compared to the conventional method. Therefore, this type of work is suitable for labor saving and automation.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing an entire hoisting and conveying apparatus according to a first embodiment of the present invention.

FIG. 2 is a perspective view of the same.

FIG. 3 is a plan view showing details of a power transmission mechanism.

FIG. 4A is a side view of a hoisting tool of the hoisting and conveying device. (B) is the same front view.

FIG. 5 is a partial perspective view showing a modified example of the first embodiment.

FIG. 6 is a perspective view of a hoisting and conveying device showing a second embodiment of the present invention.

FIG. 7 is a plan view showing details of the power transmission mechanism.

[Explanation of symbols]

1 Crane 2 Hoist 2a Crane hook 3 Horizontal frame 5 Lifting tool 6 Lattice rebar 6a Rebar 7 Drive motor 8 Hand switch (remote control part) 9,10,11,12,14,15,16 Power transmission mechanism (9 middle) Shaft, 10, 11, 12, 14 Sprocket, 15, 16 Chain) 17 Sprocket gear (upper side gear, lower side gear) 18 Chain belt 19 Locking claws 20, 21, 22, 23 Power transmission mechanism (20th (1 intermediate shaft, 21 second intermediate shaft, 22 spur gear, 23 bevel gear)

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification code Internal reference number FI Technical display location B66C 1/62 C 8922-3F E04G 21/16 7228-2E (72) Inventor Ritsuo Matsumura Chiyoda, Tokyo 2-3, Kanda-shi, Ward-ku Stock company Obayashi Corporation Tokyo head office

Claims (1)

[Claims] 1. A horizontal frame that is suspended from a crane, and a suspender that is vertically installed at the lower portions of the four corners of the horizontal frame. Each suspender is a chain belt that is endlessly suspended between a pair of upper and lower gears. A plurality of locking claws that project from the outer periphery of the chain belt in a state of being inclined in one direction and support intersecting rebars; and the hanging device that is installed on the horizontal frame and through a power transmission mechanism. A drive motor that rotationally drives the upper gear of
And a remote control unit for driving the motor in forward and reverse directions.