JPH07136832A - Positioning device for cutting rebar - Google Patents

Abstract

(57) [Abstract] [Purpose] To reduce the work of changing the cutting length in the cutting process of reinforcing bars used for concrete pillars. [Structure] Stopper holders 34, 34 are attached to a fixed-length rod 11 arranged in parallel above a fixed-scale ruler 10 for passing a reinforcing bar.
Put on. The stoppers 32, 33 are loosely inserted in the stopper holders 34, 34 so that they can be moved up and down, and air cylinders 36, 3
It is possible to independently lift and lower each by interposing 6 in between. When the stoppers 32, 33 are lowered, the stoppers 32,
The lower end portions 32a and 33a of 33 come close to the bottom portion of the reinforcing bar guide path G, and stop the reinforcing bars fed through the reinforcing bar guide path. On the other hand, when the stoppers 32 and 33 are raised, the reinforcing bars pass through the lower ends 32a and 33a of the stoppers 32 and 33. By arranging a plurality of the stoppers 32 and 33 side by side and respectively controlling the elevation thereof, various cutting lengths can be dealt with, and the cutting length can be changed by remote control.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a positioning device for cutting a reinforcing bar, and more particularly to a positioning device for cutting a PC steel wire used for a concrete column.

[0002]

2. Description of the Related Art A conventional reinforcing bar cutting positioning device will be described with reference to FIGS. In FIG. 4, a rebar cutting device 1 is provided with a rebar cutting positioning device 2. The reinforcing bar cutting positioning device 2 is composed of holders 3 and 4, and L1-L2 for cutting lengths L1 and L2 is sufficiently small, for example, L1-L2 = 70 cm for L1 = 10 m.

The rebar cutting device 1 has a pair of rollers 6 and 6 for straightening and bending a rebar 5 wound in a coil and a straight line machine 7 arranged in parallel. A cutter 8 for holding the movable blade 8a and a cutting hole 9 are juxtaposed on the linear machine 7.
Further, in front of the cutting hole 9 (on the right in the same figure), a ruler 10 for holding a U-shaped narrow passage-shaped reinforcing bar guide path G is fixedly installed, and parallel to the upper side of the ruler 10 in parallel. A linear constant length rod 11 is provided. Holders 3 and 4 are fixed to the standard length rod 11, a dummy plate 12 is inserted into the holder 3, and a stopper 13 is inserted into the holder 4.

Further, as shown in FIG. 5, the standard ruler 10 of the positioning device 2 for cutting the reinforcing bar is provided with left and right side guides 14, 15.
And a bottom guide 16 at the bottom to form a rebar guide path G through which the rebar 5 can linearly pass through the bottom. The fixed rod 11 has rear holding plates 17 and 17 and a front holding plate 1.
8, and a holding plate 19 is arranged on the mounting groove side of the front holding plate 18, and is fixed by holding bolts 20, 20, ..., The holders 3, 4 are formed. The dummy plate 12 is inserted into the holder 3 from the upper portion of the mounting groove 18a of the front holding plate 18, and the dummy plate 12 is fixed from the front surface of the holding plate 19 using the mounting screw 21. Then, the stopper 13 is inserted into the holder 4 from the upper portion of the mounting groove 18a of the front holding plate 18, and the stopper 13 is fixed from the front surface of the holding plate 19 using the mounting screw 21. The stopper 13 is a reinforcing bar guideway G
It is inserted from the upper part of and is installed near the bottom of the reinforcing bar guideway G. Further, the dummy plate 12 is provided so that the reinforcing bar having the maximum wire diameter can pass from the bottom of the reinforcing bar guide path G.

When using the rebar cutting device 1,
The cut length positioning of two types of reinforcing bars having different cut lengths shown in FIG. 4 will be described as an example. The holder 4 is fixed at the position of the rebar cutting length L1, and the holder 3 is fixed at the position of the rebar cutting length L2. First, when cutting a rebar having a cutting length L1, the worker moves to the position of the holder 4, inserts the stopper 13 into the holder 4, and tightens the mounting screw 21 to mount it. Then, the dummy plate 12 is inserted into the holder 3 and the mounting screw 21 is tightened for mounting. As a result, the reinforcing bar 5 wound in a coil shape is bent by the pair of rollers 6 and 6 and the linear machine 7 to be straightened. The rebar 5 is a cutter 8
Cutting hole 9, rebar guide path G and holder 3 of standard ruler 10
After passing through the lower part of the dummy plate 12 inserted into the holder 4, the stopper 13 inserted into the holder 4 is pulled out until the tip 5a abuts. Thus, the reinforcing bar 5 is cut to the cutting length L1 using the cutter 8. Next, when cutting the rebar having the cutting length L2, the worker moves to the position of the holder 3 and
Loosen the mounting screw 21 of the dummy plate 12 attached to the upper part of the mounting groove 18a, and discharge the dummy plate 12 from the upper part of the mounting groove 18a. Then, the stopper 13 is attached to the mounting groove 18a of the holder 3.
It is attached from the top of the holder, and the attachment screw 21 is tightened to attach it to the holder 3. As a result, similarly to the case of the cutting length L1, the straightened reinforcing bar 5 passes through the reinforcing bar guide path G and comes into contact with the stopper 13 inserted into the holder 3. Then, the reinforcing bar 5 is cut to a cutting length L2 by using a cutter 8.

[0006]

In the conventional positioning device for cutting rebars, when rebars having different cutting lengths are cut,
Every time the cutting length is changed, the worker moves to the position of the holder. Then, the stopper or the dummy plate is removed from the holder by loosening the mounting screw, another stopper or the dummy plate is inserted into the holder again, and the stopper or the dummy plate is mounted using the mounting screw. As described above, the above working time is required every time the cutting length is changed, and there is a drawback that the work efficiency is reduced.

[0007] Therefore, there arises a technical problem to be solved in order to obtain a rebar cutting positioning device capable of improving the work efficiency by improving the work efficiency and work time of positioning by changing the cutting length. The present invention aims to solve the problems.

[0008]

The present invention has been proposed in order to achieve the above object, and is a positioning device for a cutting length of a PC steel wire or the like used in a rebar cutting machine for the PC steel wire or the like. The positioning device is provided with a standard ruler provided with a reinforcing bar guide path in the longitudinal direction, and a standard length rod is provided above the standard ruler in parallel with the reinforcing bar guide path. Then, a stopper holder is attached to the standard length rod, a stopper is detachably attached to the stopper holder, and the lower end portion of the stopper is brought close to the bottom portion of the reinforcing bar guide path and fed into the reinforcing bar guide path. In a positioning device for cutting a reinforcing bar formed to stop a reinforcing bar, the stopper holder is loosely inserted into a substantially rectangular lateral hole provided in the stopper to form the stopper so as to be able to move up and down. Between the stopper holder and the stopper Interposed actuator comprising an air cylinder or the like, the stopper of the actuator by remote control is intended to provide a reinforcing bar cutting positioning device formed on detachably to rebar guideway.

[0009]

A stopper holder is mounted on a fixed length rod disposed above a fixed length ruler for holding a reinforcing bar guide path, and the stopper loosely inserted into the stopper holder is moved up and down by an actuator such as an air cylinder. It By remotely controlling the actuator with a hand switch or the like, the stopper descends or rises in the reinforcing bar guide path, and when the stopper is lowered, the progress of the reinforcing bar fed to the reinforcing bar guide path is stopped. On the other hand, when the stopper is raised, the reinforcing bar passes through the reinforcing bar guide path without stopping.

Various cutting lengths can be dealt with by arranging a plurality of positioning devices equipped with the stoppers in parallel along the reinforcing bar guide path and by raising and lowering the stoppers.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to FIGS. FIG. 1 is a front view of a reinforcing bar cutting positioning device 31 when the cutting length is two, and FIG. 2 is a side view showing a state in which the cover is removed in FIG. The reinforcing bar cutting positioning device 31 is used by replacing the holders 3 and 4 of the conventional reinforcing bar cutting positioning device shown in FIG.
Others can use a conventional example. In the embodiments, the same reference numerals are given to the same cases as the conventional example, and the description is omitted.

As shown in FIGS. 1 and 2, the rebar cutting positioning device 31 includes side guides 14, 1 of the standard ruler 10.
5, a stopper 32 adjacent to the reinforcing bar guide path G of the reinforcing bar 5 formed by the bottom guide 16 along the traveling direction of the reinforcing bar,
Lower end portions 32a and 33a of 33 are inserted from above. The lower ends 32a, 33a of the stoppers 32, 33 are formed in a V shape corresponding to the shape of the reinforcing bar guide path G, and the lower end 33a of the stopper 33 is at the front part (left side in FIG. 1) as shown in FIG. ) Is cut out to form a predetermined cutting adjustment length.

At the central portions of the stoppers 32 and 33, substantially rectangular lateral holes are opened, and as shown in FIG. 2, vertically elongated circular holes are opened in the front-rear direction, and one side surface of the stoppers 32 and 33 is notched. The side of the circular hole is open. The standard rod 11 is inserted into the lateral grooves of the circular holes of the stoppers 32 and 33, and the U-shaped stopper holder 34 is inserted from the lateral holes of the side surfaces of the stoppers 32 and 33 so that the standard rod 11 is U-shaped. It is loosely inserted in the groove, and the holding plate 3 is provided on the back surface of the stopper holder 34.
5 is fixed and the stopper holder 34 is fixed to the fixed length rod 11
Fixed to.

Further, air cylinders 36, 36 are fixedly provided on the upper ends of the stoppers 32, 33, and vertical holes 32b, 33b are opened at the upper ends of the stoppers 32, 33 to form rods of the air cylinders 36, 36. Insert 37 and 37 loosely. Then, the rods 37, 37 are screwed into the screw holes 34a, 34a provided on the upper surfaces of the stopper holders 34, 34, and the rod 3
The lock nuts 38, 38 screwed onto the screws 7, 37 are used for fixing. The fixed length rod 11 is sandwiched between the left and right positioning plates 39, 39, 39, 39, respectively, and the screw holes 40, 4 of the two positioning plates 39, 39, 39, 39 are sandwiched.
A bolt (not shown) is inserted through 0 and fastened by a nut (not shown), and the rebar cutting positioning device 31 is installed at a predetermined position.

A hand switch (not shown) for operating the air cylinders 36, 36 is arranged at an appropriate place where a worker for cutting the reinforcing bar can operate. When the rod 37 of the air cylinder 36 fixed to the stopper 32 is contracted by the operation of the switch, the stopper 32 descends, and the lower end portion 32a of the stopper 32 comes close to the bottom portion of the reinforcing bar guideway G. Further, when the rod 37 of the air cylinder 36 is extended, the stopper 32 rises and a passage for the reinforcing bar 5 is formed between the lower end 32a of the stopper 32 and the bottom of the reinforcing bar guide path G.

When the reinforcing bar cutting positioning device 31 is used to cut the reinforcing bar to the cutting lengths L1 and L2, a standard ruler at the left end (steel wire entrance side) of the stopper 32 in FIG. 1 is used. Based on the position of the positioning plate 39,3
9, 39, 39 are fixed to the standard length rod 11 with screws, and the cutting length is set to L1 or L2. Then, when cutting the reinforcing bar having the cutting length L1, the stopper 32 is lowered and the stopper 33 is raised by the hand switch. As a result, the reinforcing bar 5 fed in the reinforcing bar guide path G passes through the lower end portion 33a of the stopper 33, comes into contact with the lower end portion 32a of the stopper 32, and is forcibly stopped, and the reinforcing bar 5 is cut by the cutter 8. Cut to length L1.

When cutting the reinforcing bar having the cutting length L2, the stopper 33 is lowered by the hand switch, and the stopper 32 maintains the lowered state. That is, as shown in FIG.
When the plate thickness of the lower end portion of the stopper 33 is thin, the lower end portions 32a and 33a of the stoppers 32 and 33 are arranged side by side to prevent the lower end portion 33a of the stopper 33 from being deformed or damaged due to the impact at the forced stop. Then, the fed rebar 5 comes into contact with the lower end portion 33a of the stopper 33 and stops, as described above.
The rebar 5 is cut to a cutting length L2 by a cutter 8.

FIG. 3 shows another embodiment of the positioning device 51 for cutting the reinforcing bar. In the figure, the reinforcing bar cutting positioning device 51 is further provided with a stopper in addition to the reinforcing bar cutting positioning device 31 of the above-described embodiment, and cutting lengths L1, L2, L of three stages.
It has three sets of stoppers 52, 53, 54 and air cylinders 36, 36, 36. The action of the rebar cutting positioning device 51 is as follows.
The detailed description is omitted because it is the same as that shown in the above-mentioned embodiment, but the lower end portion 52 of the stoppers 52, 53, 54 is omitted.
It goes without saying that any combination of cutting lengths can be accommodated by changing the front-rear lengths of a, 53a, 54a.

The present invention should not be limited to the above-mentioned embodiment, but can be applied to positioning such as cutting of various wire rods and strips, and the present invention covers modifications thereof. It is natural.

[0020]

As described in detail in the above one embodiment, the present invention does not require a stopper replacement work by an operator unlike the conventional example, and changes the cutting length by remotely operating the stopper with a hand switch or the like. Therefore, the working man-hours and labor can be reduced, and the time required for changing the cutting length can be remarkably shortened, so that the working efficiency can be improved.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of the present invention.

FIG. 2 is a side view showing a state in which a positioning plate is removed in FIG.

FIG. 3 is a front view showing another embodiment of the present invention.

FIG. 4 is a front view showing a conventional example.

5 is an enlarged view showing a conventional example and showing a stopper portion in FIG.

[Explanation of symbols]

 10 Standard Ruler 11 Standard Rod 31, 51 Reinforcing Bar Cutting Positioning Device 32, 33, 52, 53, 54 Stopper 34 Stopper Holder 36 Air Cylinder G Reinforcing Bar Guideway

Claims (1)

[Claims] 1. A positioning device for a cutting length of a PC steel wire or the like used in a rebar cutting machine for a PC steel wire or the like, wherein a positioning ruler provided with a reinforcing bar guide path in the longitudinal direction is arranged in the positioning device. Further, a fixed length rod is arranged above the fixed length ruler in parallel with the reinforcing bar guide path, a stopper holder is attached to the fixed length rod, and a stopper is detachably attached to the stopper holder. Then, in the rebar cutting positioning device formed so that the lower end of the stopper is brought close to the bottom of the rebar guide passage to stop the rebar fed into the rebar guide passage, the stopper holder is The stopper is loosely inserted into a substantially rectangular lateral hole formed in the stopper so that the stopper can be moved up and down. Further, an actuator such as an air cylinder is interposed between the stopper holder and the stopper, and the actuator is remote. Operate A positioning device for cutting a reinforcing bar, wherein the stopper is formed so as to be freely inserted into and removed from the reinforcing bar guide path.