JP2540035Y2 - Rebar suspension equipment - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reinforcing bar suspending apparatus used for assembling reinforcing bars such as wall bars and column bars at a construction site.

[0002]

2. Description of the Related Art In most cases, wall bars and column bars at a construction site are built in a predetermined place one by one with vertical bars suspended by a crane. Is fixed and assembled. In order to eliminate the inefficiency of the conventional procedure, a rebar suspension device has been proposed (Japanese Patent Application No. Hei 10-26139).
3-240205).

[0003] The reinforcing bar suspension device according to the above proposal includes a support member and a plurality of gripping means which are disposed on the support member at intervals in the longitudinal direction and which releasably grip the reinforcing bar. Each gripping means includes a pair of gripping pieces, one of which is fixed to the support member, and the other gripping piece is swingably attached to the support member.

[0004]

SUMMARY OF THE INVENTION It has been found that the rebar is not sufficiently gripped by the pair of gripping pieces, and the rebar may slip. Therefore, an object of the present invention is to provide a reinforcing-bar suspension device that can securely hold a reinforcing bar.

[0005]

A rebar suspension device according to the present invention comprises a support member extending in a length direction,
A plurality of gripping means for releasably gripping a reinforcing bar, which are arranged at intervals in the length direction of the support member. Each gripping means is composed of a pair of gripping pieces having a pair of gripping pieces whose surfaces facing each other are gripping faces of the rebar.
One gripping piece is fixed to the support member so that the gripping surface approaches the rebar as the gripping surface extends downward, and the other gripping piece is swingable about an eccentric axis to the support member, and It is attached so as to swing by its own weight toward the gripping surface of the one gripping piece. The gripping surface of the other gripping piece is formed in a concave shape and has a plurality of teeth extending in a direction intersecting the axis of the rebar.

[0006] A vertical streak is held or gripped between a pair of gripping pieces of each gripping means provided on the support member, and a plurality of vertical streaks are moved to predetermined positions by suspending the support member. And build multiple rebars at once. Thereby, the work of setting up the vertical stripes can be performed efficiently.

The work of fixing the horizontal streak to the vertical streak can be performed on the ground after holding the plurality of vertical streaks by the holding means.
Thus, the work of fixing the horizontal streak to the vertical streak at a high place can be made unnecessary, and therefore, the danger of a work at a high place and a fall of an operator accompanying the work can be eliminated.

[0008] The reinforcing bar between the pair of gripping pieces always receives the oscillating power due to the weight of the other gripping piece, and the gripping surface of one gripping piece is inclined so as to approach the reinforcing bar as it goes down.
Since the gripping surface of the other gripping piece is concave and has a plurality of teeth extending in a direction intersecting the axis of the rebar, an even and strong gripping force on the rebar can be obtained. Thereby, slippage of the rebar can be prevented.

Preferably, the gripping surface of the one gripping piece is formed in a V-shaped concave shape, and the gripping surface of the other gripping piece is formed in a V-shaped concave shape.

[0010] Since the gripping surfaces of the pair of gripping pieces are V-shaped concave, in the case of rebars of different diameters, the direction of the rebars can be kept constant, and the other gripping piece can swing about an eccentric axis. Because of this, it is possible to grip the reinforcing bars having different diameters by the pair of gripping pieces. Thereby, versatility can be provided.

[0011] The rebar suspending device comprises a slide member movably attached to the support member in the longitudinal direction thereof, fixed to the slide member, and the other of the gripping means when the slide member moves. It is preferable to include a pin that engages with the other gripping piece so as to cause the piece to swing, and fixing means for releasably fixing the slide member to the support member.

By moving the slide member and swinging the other gripping piece of each gripping means, a plurality of rebars can be gripped or released simultaneously, and the slide member can be fixed to the support member by the fixing means. By fixing, the holding state of the reinforcing bar by the joint of the other gripping piece and the one gripping piece can be maintained.

When a slide member is provided, the fixing means preferably has an arm and a ratchet. The arm has a pawl, is swingably attached to the support member, and engages with the slide member. On the other hand, the ratchet is in the shape of an arc that meshes with the pawl, and is adjustable so that the distance from the swing center of the arm changes.

[0014] The engagement between the pawl and the ratchet makes it possible to firmly fix and prevent reverse rotation of the other gripping piece, and adjust the position of the ratchet to cope with the fixation of reinforcing bars having different diameters. .

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIG. 1, a reinforcing bar suspending device 10 has an elongated supporting member 12 extending in a longitudinal direction, and a longitudinal reinforcing bar as a reinforcing bar arranged on the supporting member 12 at intervals in the longitudinal direction. A plurality of grasping means 16 for releasably grasping the muscle 14.

In the illustrated embodiment, the supporting member 12 is made of an H-shaped steel having a pair of side pieces 13a and 13b and a connecting piece 13c, and is disposed so that the connecting piece 13c is vertical.
Furthermore, the side plate 18 and the side plate 19 thinner than this side plate are formed by welding to a pair of side pieces 13a and 13b. As shown in FIG. 4, the support member 12 has hooks 20 at both ends for connecting wires for suspending the reinforcing bar suspension apparatus 10 by a crane (not shown). The hook 20 has a shape in which a part of an annular ellipse is cut out, and an upper portion thereof is welded to the upper side piece 13a of the support member 12, and a lower portion thereof is welded to the side plate 18 and the lower side piece 13b. . Shackle 24 and hook 2 attached to the tip of wire 22
0 and the support member 12 is suspended. This allows
Rotation of the support member during suspension can be prevented. The one side plate 18 of the support member 12 is provided with a groove 26 extending over the entire length of the support member 12 in the length direction.

Each gripping means 16 includes a pair of gripping pieces 30, 32.
The surfaces facing each other are gripping surfaces 31 of the rebar 14,
33. One gripping piece 30 is a support member 12
On the other hand, the lower the gripping surface 31 is, the closer to the reinforcing bar 14 is fixed, and the other gripping piece 32 is
Is attached so as to be able to swing around an eccentric axis and to swing toward the holding surface 31 of one holding piece 30 by its own weight.

In the embodiment shown in FIGS. 2 and 3, the gripping piece 30 has a substantially rectangular parallelepiped shape, and the gripping surface 31 provided on one side surface is formed in a V-shaped concave shape. As is clear from FIG. 2, the entire gripping surface 31 is formed in an inclined shape approaching the reinforcing bar 14 as it goes down, and the gripping piece 30
Two vertical bolts 34 penetrating the gripping piece 30
Is screwed into the side plate 18 having the groove 26 and is fixed to the side plate 18.

In the embodiment shown in FIGS. 2 and 3, the gripping piece 32 has a substantially semi-disc shape, and has a gripping surface 3 provided on the outer peripheral surface.
3 is formed in a V-shaped concave shape. The grip surface 33 further has a plurality of teeth 36 extending in a direction intersecting the axis of the reinforcing bar 14. In the embodiment shown, the plurality of teeth 36 extend along the eccentric axis O of the gripping piece 32. Multiple teeth 3
For example, it is preferable to increase the hardness of the tooth surface of No. 6 by induction hardening. The gripping piece 32 is screwed into the side plate 18 having the groove 26 with one bolt 38 penetrating one corner on the diameter, and is swingably attached to the side plate 18. It is rocked toward the surface 31.

The slide member 40 is provided with the groove 2 of the support member 12.
6, it is movably disposed along the groove 26. The slide member 40 is provided with a plurality of pins 42 implanted in the length direction at the same interval as the interval between the adjacent gripping means 16. On the other hand, a semicircular engaging piece 44 is attached to the holding piece 32, and the pin 42 is inserted into a space between the engaging piece 44 and the holding piece 32. As a result, when the slide member 40 moves, the pin 42 causes the other gripping piece 32 of each gripping means 16 to swing.

A fixing means 50 for releasably fixing the slide member 40 to the support member 12 is provided at one end of the support member 12. The fixing means 50 includes, as shown in FIGS. 4 and 5, an arm 54 swingably attached to the side plate 18 of the support member 12 by a bolt 52,
And an arcuate ratchet 56. At the lower end of the arm 54, an elongated hole 58 whose longitudinal axis is positioned vertically is provided, and the pin 60 implanted in the slide member 40 is inserted into the elongated hole 58.
Plug in. As a result, the swing movement of the arm 54 is taken out as the translation movement of the slide member 40 via the pin 60, and moves the slide member 40. Therefore, the magnitude of the swing of the gripping piece 32 can be adjusted by the swing angle of the arm 54.

In the embodiment shown in FIG. 5, the arm 54 has a pivot portion 62 attached by a bolt 52 and an operation portion 63 extending from the pivot portion 62 in a crank shape.
A bracket 66 is attached to a boss 64 provided on the operation section 63 so as to be able to swing up and down. Bracket 66
Is composed of a pair of side portions 68 and a top portion 69 fixed on these side portions 68. The pair of side portions 68 are provided with an elongated hole 70 whose major axis is located in the horizontal direction, and the handle 72 is attached to the top portion 6.
9 is fixed. Rod 76 having pawl 74 at its tip
Are swingably supported in the elongated hole 70 by the pin 75. The rod 76 is supported movably in the vertical direction by a guide 78 provided on the operation portion 63 of the arm 54, and is biased downward by a spring 82 disposed between the guide 78 and a stopper 80 fixed to the rod 76. ing.

The ratchet 56 has teeth that engage with the pawl 74 in an arc shape, and can be adjusted so that the distance from the swing center of the arm 54 changes. In the illustrated embodiment,
The ratchet 56 is provided integrally with the base 90, and the base 90 is connected to the side piece 13 a of the support member 12 by a bolt 92 whose long axis passes through a long hole (not shown) positioned in the length direction of the support member 12. Attached to. On the other hand, a bracket 94 is attached to the end surface of the support member 12, and a rod 96 having a screw at the tip is rotatably supported by the bracket 94. The screw of the rod 96 is screwed into an engaging portion 98 that projects vertically from the base 90. As a result, when the rod 96 is rotated, the base 90 integrated with the engaging portion 98 moves, and the ratchet 56 is moved to the supporting member 12.
Move in the length direction.

When assembling the vertical bars 14 at the construction site, the vertical bars 14 are erected at predetermined positions. First, the reinforcing bar suspension device 10 is placed on the ground so that the gripping means 16 thereof faces upward. After the upper portion of the vertical streak 14 is disposed between the gripping pieces 30 and 32 of each gripping means 16, the
The handle 72 and the arm 54 are operated so as to be gripped with. Prior to this, the bolt 92 of the base 90 is loosened and the rod 96
To finely adjust the position of the ratchet 56,
At a position where a gripping force corresponding to the diameter is generated.

When the handle 72 and the operating section 63 of the arm 54 are grasped, the rod 76 moves upward, and the pawl 74 comes off the ratchet 56. When the arm 54 swings to the left in FIG. 4 in this state, the slide member 40 moves to the right, and the pin 42 implanted in the slide member 40
As shown by the imaginary line, the gripping piece 32 is swung to grip the vertical streak 14 between the gripping pieces 30 and 32. When the grip of the handle 72 is released after swinging the arm 54 to a predetermined position, the rod 76 is pushed out by the spring 82 and the pawl 7
4 is engaged with the ratchet 56, and the movement of the slide member 40 is prevented.

After the pawl 74 and the ratchet 56 are engaged, the necessary horizontal streaks 10 are gripped by the plurality of gripping means 16 of the reinforcing bar suspending device 10 and aligned.
0 is fixed. However, the gripping of the vertical stripes 14 by the gripping pieces 30 and 32 can also be performed after assembling the plurality of vertical stripes and the plurality of horizontal stripes in a lattice shape. After fixing the horizontal line 100, the reinforcing bar suspension device 10 and the gripper 1
The rebar assembly consisting of the vertical bars 14 and the horizontal bars 100 suspended by 6 is moved to just above a predetermined place and lowered. After temporarily fixing the plurality of vertical streaks 14 at a predetermined erection location, the handle 72 and the arm 54 are grasped, and the arm 54 is swung to the right in FIG. Then, the slide member 40 moves to the left, and the vertical streak 1
4 is released.

[Brief description of the drawings]

FIG. 1 is a perspective view of a reinforcing bar suspension device according to the present invention, showing a state in which a reinforcing bar is suspended.

FIG. 2 is a front view showing two gripping pieces and a vertical streak.

FIG. 3 is a bottom view of FIG. 2;

FIG. 4 is a front view showing fixing means of the slide member.

FIG. 5 is a left side view of FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Rebar suspension apparatus 12 Support member 14 Vertical streak 16 Gripping means 30, 32 Gripping piece 40 Sliding member 42 Pin 50 Fixing means 54 Arm 56 Ratchet 74 Paws

Claims (4)

(57) [Scope of request for utility model registration] 1. A support member extending in a length direction, and a plurality of holding means for releasably holding a reinforcing bar, which are arranged on the support member at intervals in the length direction, wherein each holding means includes: A pair of gripping pieces, each of which has a surface facing each other as a gripping surface of the rebar, and one gripping piece approaches the support member, and the closer the gripping surface is to the rebar, the closer the rebar. Fixed, and the other gripping piece is attached to the support member so as to be able to swing around an eccentric axis, and to swing by its own weight toward the gripping surface of the one gripping piece, A reinforcing bar suspension device, wherein a gripping surface of the other gripping piece is formed in a concave shape and has a plurality of teeth extending in a direction intersecting an axis of the reinforcing bar. 2. The reinforcing bar according to claim 1, wherein the gripping surface of the one gripping piece is formed in a V-shaped concave shape, and the gripping surface of the other gripping piece is formed in a V-shaped concave shape. Suspension device. 3. A slide member attached to the support member so as to be movable in a length direction thereof, and the other gripping piece of each of the gripping means fixed to the slide member and moving the slide member. 2. The rebar suspension according to claim 1, further comprising a pin that engages with the other gripping piece so as to generate a swinging motion, and fixing means for releasably fixing the slide member to the support member. apparatus. 4. The fixing means includes an arm having a pawl, which is swingably attached to the support member and is engaged with the slide member, and an arcuate ratchet engaging with the pawl, wherein the arm has a swinging motion. The rebar suspension according to claim 3, further comprising a ratchet adjustable to change a distance from the moving center.