JPH0534823Y2 - - Google Patents

Description

[Detailed Description of the Invention] Purpose of the Invention Industrial Application Field The present invention relates to a reticulated reinforcing bar bending machine suitable for use in bending reticulated reinforcing bars used in secondary concrete products and the like.

<<Prior Art>> FIG. 7 is a perspective view showing an example of a conventional mesh reinforcing bar bending machine.

The reticulated reinforcing bar bending machine 30 has a press mold 31 in the shape of a long and thin bar.
The reticulated reinforcing bars are bent by pressing them against two parallel rolls 33 below. The press die 31 is operated by a cylinder 34 connected to both ends thereof,
The two rolls 33 are rotatably attached to a stand 35.

Problems to be Solved by the Invention In the conventional mesh reinforcing bar bending machine, when setting and removing the mesh reinforcing bars, the mesh reinforcing bars must be moved in the direction of arrow A in FIG. This can be a very complicated task depending on how the reticulated reinforcing bars are bent and the work conditions. For example, when bending a mesh reinforcing bar into a wave shape, the bent mesh reinforcing bar must be pulled out in the direction of arrow A, turned inside out, and then inserted again from the direction of arrow A and set. In addition, when using the mesh reinforcing bars in a box or box culvert, bend them into a cylindrical shape as shown in Fig. 7. In this case, disconnect the cylinder 34 at one end of the press die 31 and bend the mesh reinforcing bars in the direction of arrow B. It has to be extracted.

The present invention has been made in order to provide a reticulated reinforcing bar bending machine that improves the inefficiency of the conventional reticulated reinforcing bars when setting and taking out reticulated reinforcing bars.

《Structure of the invention》 《Means for solving the problems》 The present invention is a reticulated reinforcing bar bending machine that bends the reticulated reinforcing bars by pressing the reticulated reinforcing bars between a lower mold or two parallel rolls. This reticulated reinforcing bar bending machine is characterized in that a pressing piece is fixed to a plate or rod-shaped ram and is positioned downward and above the ram.

As a means for operating the ram, any known mechanical means such as a crank type or screw type, or a hydraulic type may be used.

The pressing piece may be indirectly fixed to the ram using a fixing piece so as to be positioned at a predetermined position, as in the embodiments described later, or the pressing piece may have a shape in which the pressing piece and the fixing piece are integrated. It's good as well.

It is desirable that the press piece is removably attached to the ram. This is because it can be used for mesh reinforcing bars having various reinforcing bar spacings by attaching the pressing pieces in accordance with the reinforcing bar spacing of the mesh reinforcing bars.

The pressing piece or the fixing piece can be fixed to the ram by any means such as bolts or pins, cutting the ram in two and clamping the ram, or using a combination of these.

<<Operation>> In the present invention, the pressing die is not made into a conventional long rod shape, but is fixed to a plate or rod-shaped ram as a plurality of pressing pieces and positioned downward and above the ram, so when setting the reticulated reinforcing bar, As shown by the arrow in FIG. 1, each reinforcing bar t to be bent is placed under the mold piece by lowering it from above and moving it slightly laterally. To take out the reticulated reinforcing bar that has been bent, contrary to the case of setting it, it is sufficient to move the reticulated reinforcing bar slightly to the side, intersect the pressing pieces, and then lift it upward.

《Example》 Figures 1 to 5 relate to a reticulated reinforcing bar bending machine that is an example of the present invention, in which Figure 1 is a sectional view, Figure 2 is a partially cutaway top view, and Figure 3 is a main part. Cross section, 4th
5 is an exploded perspective view showing the fixed state of the mold piece, and FIG. 6 is a front view showing an example of the replacement mold piece.

As shown in FIG. 1, this reticulated reinforcing bar bending machine consists of a ram 1, a pressing piece 2, a fixed piece 3, two parallel rolls 22, a power cylinder 19 for moving the ram up and down, a stand 16, and the like.

As shown in FIG. 1, the ram 1 is plate-shaped, and both ends are connected and supported by a power cylinder 19 by bolts 20, and it moves up and down as the power cylinder expands and contracts. Wheels 15 are provided near both ends, and the wheels 15 are attached to the side plates 1 of the stand 16.
7 and guides the vertical movement of the ram. In addition, two rack gears 12 are welded and fixed to the slightly inner side surface.
This is the 2nd part of the shaft 14 which is fixed to the side plate 17 of the stand 16.
When the ram moves up and down, the shaft 14 rotates, and its torsional rigidity causes both ends of the ram to move by the same amount, so the ram is always kept horizontal. As shown in FIG. 3, a groove 11 is provided in the upper part of the ram to securely fix the fixing piece 3.

As shown in FIG. 5, the pressing piece 2 has pins 4 and 5 in an inverted semicircle shape for connecting to the fixing piece 3. The mold piece 2 is fixed to the ram 1 via the fixing piece 3 and is positioned downward and above the ram 1. The mold pieces are provided in accordance with the spacing of the reticulated reinforcing bars.

The fixing piece 3 is attached to the molding piece 2 as shown in FIG.
It is fixed to the ram and is divided into two parts. On the upper side, there is a semicircular notch 7 that engages with the pin 4 and a hole 8 that engages with the pin 5 as a means for fixing the press piece, and on the lower side, there is a shape of the head of the ram as a means for fixing it to the ram. Holes 9 and 10 for connecting the split molds 3a and 3b with bolts 25 are provided in the middle of the matching notch 6. The hole 10 is internally threaded. Fit the split molds 3a and 3b of the fixed piece 3 so that the notch 6 grips the head of the ram 1, fit the pins 4 and 5 of the press mold piece into the holes formed by the notch 7 and the hole 8, and tighten the bolts. The mold piece is fixed to the ram by tightening with 25. The pressing piece may be integrated with the fixing piece and fixed directly to the ram, but if it is separated as in this example, it will be easier to replace the pressing piece with one of a different size. It is suitable and easy to manufacture.
For example, FIG. 6 shows a pressing piece 24 for corner bending.
By replacing the mold piece 2 with this, corner bending can be easily performed.

Two parallel rolls 22 serve as lower molds, and bearings 23 are placed on the table 16 at appropriate intervals.
It is rotatably mounted.

The power cylinder 19 is fixed to the support plate 18 with bolts 21.

In a normal state, as shown in FIG. 3, the die piece 2 is located above the roller 22, and the reinforcing bar t is set between the die piece 2 and the roller 22. The reticulated reinforcing bars are set from above as shown by the arrows in FIG. When the power cylinder 19 is operated, the ram 1 and the press piece 2 are lowered and the reinforcing bar t is bent, as shown in FIG. When the bending is completed, the ram 1 and the mold piece 2 rise.

<<Effects of the invention>> Since the mesh reinforcing bar bending machine of the present invention sets and takes out the mesh reinforcing bars from above,
No matter what kind of bending process is applied to the reticulated reinforcing bars, and under any working conditions, efficient work can be achieved. In particular, cylindrical processing of reticulated reinforcing bars,
Remarkable effects can be obtained in corrugation processing, etc., and in processing large mesh reinforcing bars using a crane.

[Brief explanation of the drawing]

Figures 1 to 6 relate to a reticular reinforcing bar bending machine that is an embodiment of the present invention, in which Figure 1 is a sectional view, Figure 2 is a partially cutaway top view, Figure 3 is a sectional view of the main part, and 4
5 is an exploded perspective view showing the fixed state of the mold piece, and FIG. 6 is a front view showing an example of the replacement mold piece. FIG. 7 is a perspective view showing an example of a conventional reticulated reinforcing bar bending machine. 1... Ram, 2... Pressing piece, 3... Fixed piece,
4, 5...Pin, 6,7...Notch, 8,9,10
... Hole, 11 ... Groove, 12 ... Rack gear, 13
...pinion gear, 14...shaft, 15...wheel,
16...stand, 17...side plate, 18...support plate, 1
9...Power cylinder, 20, 21...Bolt, 22...Roller, 23...Bearing, 2
4...Mold piece, 25...Bolt.

Claims (1)

[Claims for Utility Model Registration] (1) In a reticulated reinforcing bar bending machine that bends reticulated reinforcing bars by pressing the reticulated reinforcing bars between a lower die or two parallel rolls using a pressing die, a plurality of pressed pieces are bent by a plate or bar-shaped ram. A reticulated reinforcing bar bending machine, characterized in that the reticulated reinforcing bar bending machine is fixed to the ram and is positioned downwardly and above the ram. (2) The reticulated reinforcing bar bending machine according to claim 1 of the utility model registration claim, in which the pressing piece is detachable from the ram. (3) Utility model registration claim No. 2 in which the stamping piece is fixed to the ram via a fixing piece that has a fixing means for fixing the stamping piece to the ram on the lower side and a fixing means for the stamping piece on the upper side surface.
Section's mesh rebar bending machine.