JPH0416852Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention is a reinforcing bar core used in reinforcing steel work when joining a lower reinforcing bar buried in concrete and an upper reinforcing bar placed above it. This is related to a combination machine.

[Prior art] When pouring a thick layer of concrete, such as in the bottom of an underground tank or the floor slab of a nuclear reactor hangar, reinforcement placement and concrete pouring are performed as shown in Figures 4A and B. It is done in multiple stages. For this purpose, the lower reinforcing bars 32 buried in the concrete 31 and the vertical bars 34 and diagonal bars 35 of the upper reinforcing bars 33 at the upper part of the joint surface of the concrete are joined together by welding or using a coupler 36 or the like.

[Problems to be solved by the invention] Conventionally, when joining reinforcing bars, the reinforcing bars were lapped together and the lapped portions were tied or welded. However, when such joints are applied to large reinforcing bars, a large amount of reinforcing bar material is required for the laps, and since the joints are vertical or diagonal bars, the presence of laps makes it difficult to assemble the upper horizontal bars. There were problems such as. Therefore, joints using couplers, which have been considered economically expensive up until now, are being adopted, but in this case, it is necessary to align the vertical or diagonal stripes at the top and bottom, which takes time and effort.

[Means for solving the problem] This invention was devised to solve the problem when jointing reinforcing bars with the above-mentioned coupler. To provide a reinforcing bar alignment machine capable of skillfully and reliably aligning reinforcing bars by drawing vertical bars or diagonal bars of an upper reinforcement arrangement to vertical bars or diagonal bars.

This invention for the above purpose includes a lower gripping arm and an upper gripping arm each having a reinforcing bar gripping portion at the tip.
The upper gripping arm is rotatable and can move forward and backward, and the lower gripping arm is fixed and connected at the upper and lower parts of the column in a vertically parallel manner. The main feature is that a cylinder for adjusting the angle of the upper and lower gripping arms is disposed over the top and the support.

[Function] The above-mentioned reinforcing bar alignment machine is placed on the joint surface of concrete, and by moving the machine forward with a trolley, the reinforcing bar gripping part at the tip of the lower gripping arm is aligned with the vertical or diagonal reinforcement of the lower reinforcing bar. The entire machine can be fixed by coming into contact with the upper part and gripping the upper part by the reinforcing bar gripping part. In addition, the upper gripping arm grasps the lower part of the upper reinforcing bar with the reinforcing bar gripping part when the machine is moving forward or after fixing, and when the center of both reinforcing bars is misaligned, the lower reinforcing bar can be moved forward and backward, or by moving forward and backward and rotating. Pull the upper reinforcing bar directly above and align it.

Furthermore, the pair of upper and lower gripping arms can be positioned at any desired angle by means of an angle adjustment cylinder provided between the truck and the column, and can be aligned without being affected by the angle of the reinforcing bars to be jointed.

[Example] 1 is a lower gripping arm, 2 is an upper gripping arm,
These are connected vertically in parallel via pillars 3.

The lower gripping arm 1 consists of a recess 12 at the tip of a plate body 11 that receives the lower reinforcing bar 4, and a wedge member 14 that fixes the lower reinforcing bar 4 in the recess by a cylinder 13 attached to the side surface of the tip. Equipped with a reinforcing bar gripping part.

Further, the upper gripping arm 2 is provided with a reinforcing bar gripping portion consisting of a head 24 having a recess 22 for receiving the upper reinforcing steel 5 at the tip of the rod body 21, and an opening/closing member 23 for the recess 22.

The rear end of the rod 21 is inserted into and held by a guide block 26 on a seat plate 25 rotatably provided at the top of the column 3. It is connected to the piston 28 of the moving cylinder 27. Also, pillar 3
and the seat plate 25, a rotating cylinder 29
is provided, and this cylinder 29 allows the upper gripping arm 2 to rotate.

Reference numeral 6 denotes a truck, which has a pair of bearing plates 7 on its front upper surface, to which the lower gripping arm 1 is connected via a shaft 8 so as to be vertically movable. A cylinder 9 for adjusting the angle is provided across the upper rear surface of the truck 6 and the upper rear surface of the support column 3, and this cylinder 9 allows both the lower gripping arm 1 and the upper gripping arm 2 to be connected via the support column 3. It is designed so that it can be tilted.

The reinforcing bar alignment machine having the above structure is used by being placed on the concrete joint surface. Further, movement is performed by connecting a separately prepared hydraulic system to the rear of the truck 6.

To align the reinforcing bars, the tip recess 12 of the lower gripping arm 1 is inserted into the lower reinforcing bar 4 to which the coupler 10 is screwed to the upper end in advance by moving the cart 6 forward, and the piece member 14a is interposed on the side of the reinforcing bar. After that, the cylinder 13 is moved forward to insert the wedge member 14, and the bridge member 14a is pressed to grip the lower reinforcing bar 4 and fix the machine.

In this case, when the lower reinforcing bar 4 is a vertical longitudinal bar, the lower gripping arm 1 and the upper gripping arm 2 are held horizontally by the angle adjustment cylinder 9, as shown in FIG. Make a move. In the case of diagonal reinforcement, as shown in FIG. is placed at an angle with the upper gripping arm 2.

Next, the tip recess 22 of the upper gripping arm 2 is moved to the position of the upper reinforcing bar 5. This movement is performed by upper reinforcing bar 5.
This is done by operating the cylinders 27 and 29 according to their positions. Once the upper reinforcing bar 5 is fitted into the recess 22, the recess 22 is closed using the opening/closing member 23, and the opening/closing member 23 is secured by the lock pin 23a to grip the upper reinforcing bar 5.

Then, the cylinders 27 and 29 are operated again to move the upper gripping arm 2, and the upper reinforcing bar 5 is drawn onto the lower reinforcing bar 4 for centering. When both cores meet, the coupler 10 is rotated, and the thread around the reinforcing bars moves the coupler 10 to the upper reinforcing bar 5 to joint both reinforcing bars.

[Effects of the invention] As described above, this invention has a lower gripping arm 1 and a lower gripping arm 2 each having a reinforcing bar gripping portion at the tip. The lower gripping arm 1 is mounted on the top and bottom of the support column 3 in a fixed state and connected vertically in parallel. Since the angle adjustment cylinder 9 is provided, the angle adjustment cylinder 9 allows the lower reinforcing bar 4 to
The machine can be set to suit the angle.

In addition, the lower gripping arm 1 is fixed to the lower reinforcing bar 4,
Since the reaction force can be taken from the lower reinforcing bar 4, the upper reinforcing bar 5 can be removed by operating the upper gripping arm 2.
It is possible to smoothly center the reinforcing bars by shifting the bundled reinforcing bars without bending the upper and lower reinforcing bars. Moreover, alignment can be done with the coupler attached to the lower reinforcing bar, making the coupler joint easier, eliminating the need for a lap part, reducing the amount of reinforcing bar, and making it easier to install the upper transverse bar. , the reinforcing bar joint work is mechanized, which has many advantages such as improved work efficiency.

[Brief explanation of the drawing]

The drawings show one embodiment of the reinforcing bar centering machine according to this invention, in which Fig. 1 is a perspective view, Fig. 2 is a sectional view showing the joint state of vertical bars, and Fig. 3 is a cross-sectional view showing the joint state of diagonal bars. The cross-sectional views shown in FIGS. 4A and 4B are explanatory diagrams of examples of reinforcement arrangement. 1...Lower gripping arm, 2...Upper gripping arm, 3...Strut, 4...Lower reinforcing bar, 5...Upper reinforcing bar, 6...Dolly, 9...Angle adjustment cylinder.

Claims (1)

[Scope of utility model registration request] A lower gripping arm with a reinforcing bar gripping part at the tip and an upper gripping arm are connected vertically in parallel, with the upper gripping arm being rotatable and moving forward and backward, and the lower gripping arm being fixed at the top and bottom of the column. A reinforcing bar centering machine in which a lower gripping arm is supported on a truck so as to be movable up and down, and a cylinder for adjusting the angle of the upper and lower gripping arms is provided over the truck and the support.