JP2003334718A - Cutting blade structure in reinforcing steel cutting device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To simplify an operation and achieve low costs by changing the posi tion of a light and small cutting chip body and exchanging the chip itself with out exchanging a heavy and expensive cutting blade. <P>SOLUTION: This cutting blade is constituted of a base chuck body 12 fixed to a stationary blade stand 2 and a movable blade stand 3, and a cutting blade chip body 13 having a plurality of cutting faces whose cutting faces are changeably mounted to the base chuck body 12. The base chuck body 12 has a notch 12B bumped in a step form with an approximately L-shaped projection 12A left on a cutting side edge face, and a cutting blade chip body 13 made of a die steel material with both upper and lower end side faces along a longitudinal direction as cutting faces is detachably mounted and fixed to the notch 12B under a condition that the cutting faces are slightly projected outwardly from the projection 12A. A groove 12C is bumped on the inner wall side of the notch 12B at the bottom end of the projection 12A, so as to form a flash accommodation space Q for releasing the flash generated at the corner edge of the used cutting blade chip body 13. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cutting blade body structure in a reinforcing bar cutting device having a cutting blade body for cutting, for example, high-strength reinforcing bars with a forced shearing force.

[0002]

2. Description of the Related Art Conventionally, as a rebar cutting device of this type,
A fixed blade base to which one cutting blade body is fixed, and a movable blade base to which the other cutting blade body is fixed so that the other cutting blade body can be driven and operated in a direction toward or away from the fixed blade base. It is provided so that the cutting blades can be rubbed against each other by being displaced in the longitudinal direction of the reinforcing bars arranged between them, and for example, high-strength reinforcing bars or the like arranged between these cutting blades are forced. It is cut by shearing force. The cutting blade in this case is formed in a large rectangular parallelepiped shape having a height of about 9.3 cm, a depth length of about 23 cm, and a width of about 2 cm, and one end edge surface side along the longitudinal direction is cut. Since it is a surface, it is removably attached to each of the fixed blade base and the movable blade base by, for example, fixed groove-shaped mounting portions by screwing. Then, for example, when the cutting blade becomes less sharp due to burrs after being used many times, the cutting blade itself is once removed from the mounting portions of the fixed blade base and the movable blade base, and the other edge surfaces are used. The top and bottom or the front and back are exchanged so that a certain blade surface is located, and they are screwed and fixed to the mounting portion again.

[0003]

However, in such a conventional rebar cutting device, the cutting blade itself having a large size and a considerable weight is exchanged from the mounting portions of the fixed blade base and the movable blade base, so that the replacement thereof is required. The work becomes very troublesome. Moreover, since the cutting blade itself is very expensive, the replacement cost is very high even if the corner edge surface is replaced. In addition, the cutting blade surface often collapses and burrs are generated on the cutting blade body after it has been used many times, and when this is directly replaced with the mounting portion and used, the fixing groove-shaped mounting portion is scratched by the burr. However, there is a problem in that the load on the entire device increases, which may eventually cause a failure.

Therefore, the present invention was created in view of the above existing circumstances, and the conventional troublesome work of repositioning and exchanging the cutting blade body having a large size and weight from the mounting portion. The cutting blade tip itself with a cutting blade is small and lightweight, eliminating the need for replacement work and replacing the expensive cutting blade itself. To provide a cutting blade structure in a reinforcing bar cutting device that can be easily replaced at low cost with a simple cutting surface, reduces the work load by simplifying the replacement work, etc., and can minimize failures. With the goal.

[0005]

In order to achieve the above-mentioned object, in the present invention, a fixed blade base 2 to which one cutting blade body 11 is fixed, and a proximity or a distance from the fixed blade base 2. The movable blade base 3 to which the other cutting blade 11 is fixed so that the cutting blades 11 can be driven in any direction, is displaced in the longitudinal direction of the reinforcing bar P disposed between the two cutting blades 11 so that the cutting blades 11 are separated from each other. 1 is a structure of a cutting blade in a reinforcing bar cutting device provided so as to be capable of rubbing against each other, wherein the cutting blade 11 is a base chuck body 12 in a state of being constantly fixed to each of the two blade bases 2 and 3, and a base chuck. The cutting blade chip body 13 has a plurality of cutting surfaces that are mounted so that the cutting surfaces can be changed. Base chuck body 1
2 has a notch 12B formed in a step-like shape by leaving a substantially L-shaped projection 12A on the cutting-side end edge surface, and a die having upper and lower end side surfaces along the longitudinal direction as cutting surfaces. The cutting blade tip body 13 made of steel has a projection 12 with the cutting surface.
It can be configured to be attached and fixed to the cutout portion 12B in a state of slightly protruding to the outside of A. Protrusion 12
On the inner wall surface side of the cutout portion 12B at the lower end of A, the cutting blade after use is provided between the corner edge surface side in the longitudinal direction of the cutting blade tip body 13 mounted and fixed in the cutout portion 12B and the inner wall surface of the cutout portion 12B. It is possible to form a grooved portion 12C in order to form a burr accommodating space Q that allows burr generated at the corner edge of the chip body 13 to escape.

In the cutting blade structure in the reinforcing bar cutting apparatus according to the present invention configured as described above, the cutting blade tip body 13 having a plurality of cutting surfaces is constantly fixed to the fixed blade base 2 and the movable blade base 3, respectively. By attaching the cutting blade 11 so that the cutting surface can be changed, the cutting blade 11 itself is light and small in size without requiring a troublesome replacement work. The chip body 13 makes it possible to replace the cut surface after many uses. The cutout portion 12B of the base chuck body 12 is attached to the cutting blade tip body 13 itself so that the cutting surface of the cutting blade tip body 13 projects slightly outside the protrusion 12A, so that the cutting blade tip body 13 itself is attached and fixed to the cutout portion 12B more than the conventional reinforcing bar P. Allows deep cutting. Groove portion 1 provided on the inner wall surface side of the cutout portion 12B at the lower end of the projection portion 12A
2C, when the cutting blade tip body 13 is mounted and fixed in the cutout portion 12B, a burr accommodating space portion Q is formed between the corner edge surface side in the longitudinal direction of the cutting blade tip body 13 and the inner wall surface of the cutout portion 12B. By forming the cutting blade tip body 13, it is possible to store burrs and the like generated at the corner edge of the cutting blade tip body 13 in the burr housing space Q when the cutting surface is replaced after being used many times. Let

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below with reference to the drawings.
For example, it is a cutting device main body in a reinforcing bar cutting device for cutting a high-strength reinforcing bar P or the like with a forced shearing force. As shown in FIG. 1, the cutting device body 1 includes a fixed blade base 2 fixed to a lower portion of a cutting portion into which a reinforcing bar P is inserted, and a fixed blade base 2.
The movable blade base 3 is arranged above the fixed blade base 2 above the fixed blade base 2 so that the movable blade base 3 can be driven to move toward or away from the movable blade base 3. Each of these two blade pedestals 2 and 3 is provided with a mounting portion 6 including an upright surface portion 4 for holding a side surface of a base chuck body 12 and a bottom groove portion 5 for holding a lower end side of the base chuck body 12, which will be described later. Overall L
It is formed to have a mold block shape.

As shown in FIG. 3, the fixed blade base 2 and the movable blade base 3 have cutting blade bodies 11 of the same structure fixed to their respective mounting portions 6, and the reinforcing bars P arranged between the two cutting blade bodies 11 are fixed to each other. The cutting blades 11 are provided so as to be movable in the directions in which the cutting blades 11 rub against each other by being displaced in the longitudinal direction. The movable blade base 3 itself is attached to the vertical drive unit 7 of the cutting device body 1,
By moving the up-and-down drive part 7 to the descending side, the movable blade base 3 approaches the fixed blade base 2 side, and shearing force is applied by the respective cutting blade bodies 11 to the reinforcing bars P arranged between the blade bases 2 and 3. It is configured so that it can be actuated and cut.

The cutting blade 11 is made of carbon steel such as S45C and has a width of about 4 cm, for example.
A slightly flat rectangular parallelepiped base chuck body 12 having a depth length of about 23 cm and a height of about 10 cm, for example, SK
For example, it is formed of a die steel material such as D61 and a rectangular bar-shaped cutting blade tip body 13 having a width of about 3 cm, a depth length of about 22 cm, and a height of about 4 cm.

As shown in FIG. 2, the base chuck body 12
Is formed with a notch 12B in a stepped shape, leaving a substantially L-shaped protrusion 12A on the end surface of the cutting side.
Screw holes 14 are formed on the side surface, for example, at three positions for fixing the cutting blade tip body 13 with a screw. And
Screw holes are formed on the side surface of the base chuck body 12, for example, at two positions on the left and right, by drilling the base chuck body 12 itself on the upright surface portion 4 in the mounting portion 6 of the double-edged blade bases 2 and 3 including the upright surface portion 4 and bottom groove portion 5. A dish-shaped screw penetration hole 15 for inserting a countersunk screw body 16 to be screwed into and fixed to the screw 14 is formed. The height of the base chuck body 12 is made larger than the height of the upright surface portion 4, and the cutting blade tip body 13 attached to the end surface of the cutting side slightly protrudes above the upper end of the upright surface portion 4. .

On the other hand, the cutting blade tip body 13 has upper and lower side surfaces along the longitudinal direction as cutting planes and corner edges as blade portions, and the base surface of the cutting blade tip body 13 is provided at three locations. A tube having a hexagonal hole for inserting a hexagonal wrench in a screw head, for example, which is screwed into a screw hole 17 on the side surface of the protruding portion 12A of the projection 12 to fix the cutting blade tip body 13 itself to the base chuck body 12. A screw insertion hole 18 for inserting the screw body 19 is formed. The height of the cutting blade tip body 13 is equal to the protrusion 12A of the base chuck body 12.
And the cutting surface of the cutting blade tip body 13 attached to the cutting-side end edge surface is slightly protruded to the outside of the projection 12A, for example, about 5 to 10 mm, and is attached to the notch 12B. It is fixed. In this way, by slightly increasing the protruding length of the cutting blade tip body 13 with respect to the upper and lower base chuck bodies 12, the reinforcing bar P can be cut deeper than in the conventional case.

On the inner wall surface side of the cutout 12B at the lower end of the projection 12A, a rectangular groove 12C having a lateral width of about 2 to 3 mm is formed by drilling, for example, and mounted in the cutout 12B. A notch is formed between the fixed side edge of the cutting blade tip 13 in the longitudinal direction and the inner wall surface of the cutout portion 12B by escaping burrs generated at the corner edge of the cutting blade tip body 13 due to many uses. A burr accommodating space portion Q is formed to prevent damage to the inner wall surface of the portion 12B.

Next, an example of assembling and using the embodiment configured as described above will be described. As shown in FIG. 2, the base chuck body 12 includes a fixed blade base 2 and a movable blade base 3.
It is in a state of being constantly fixed to the screw hole 14 of each mounting portion 6 by a countersunk screw body 16. The cutting blade tip body 13 is attached to the notch 12B of the base chuck body 12, the cylindrical screw body 19 is inserted into the screw insertion hole 18 of the cutting blade tip body 13, and a hexagon wrench is inserted into the screw head. The cutting blade tip body 13 itself is fixed to the base chuck body 12 by being screwed into the screw hole 17 on the side surface of the protrusion 12A.

When the cutting device body 1 is used, as shown in FIG. 3, the movable blade base 3 attached to the vertical drive part 7 is fixed by driving the vertical drive part 7 of the cutting device body 1 downward. Each cutting blade tip body 13 is attached to the reinforcing bar P located between the two blade stands 2 and 3 close to the blade stand 2 side.
A shearing force is applied to cut.

When changing the cutting surface of the cutting blade tip body 13 after many times of use, the cutting fixedly attached to the notch 12B of the base chuck body 12 fixed to the fixed blade base 2 and the movable blade base 3 respectively. After removing the blade tip body 13, the cutting surfaces may be turned upside down and the left and right sides may be replaced, and the blade tip bodies 13 may be reattached. At this time, burrs generated on the corner edge portion of the cutting blade tip body 13 by a large number of uses are the corner edge surface side in the longitudinal direction of the cutting blade tip body 13 mounted and fixed in the notch portion 12B and the inner wall surface of the notch portion 12B. It is accommodated in the burr accommodating space portion Q formed between the cutout portion 12 and
The inner wall surface of B is prevented from being damaged. In addition, the cutting blade tip body 1 according to the thickness and hardness of the rebar P to be cut
The frequency of changing the cut surface of No. 3 may be changed appropriately.

Upon replacement of the cutting blade tip body 13 itself after many times of use, the cutting blade tip mounted and fixed to the notch 12B of the base chuck body 12 fixed to the fixed blade base 2 and the movable blade base 3 respectively. After removing the body 13, it may be replaced with a new cutting blade tip body 13 and reattached. At this time, the replacement frequency of the cutting blade tip body 13 itself may be appropriately changed according to the thickness and hardness of the reinforcing bar P to be cut.

[0017]

EFFECTS OF THE INVENTION Since the present invention is constructed as described above, the conventional troublesome work of repositioning and exchanging the large-sized heavy cutting blade itself from the mounting portion 6 of the cutting device body 1 is performed. Need not be replaced, and even if the expensive cutting blade itself is not replaced, the cutting surface of the base chuck body 12 is light and small, and a new cutting surface is used after many uses. It can be easily and easily replaced at a low cost by repositioning and exchanging on the cut surface, thereby reducing the burden on the entire device,
Breakdown can be minimized.

In other words, this is the structure of the cutting blade 11 according to the present invention. The base chuck body 12 is always fixed to the fixed blade base 2 and the movable blade base 3, and the base chuck body 12 is cut. This is because it is composed of a cutting blade tip body 13 having a plurality of cutting surfaces whose surfaces are changeably mounted, which makes it difficult to attach and remove the cutting blade body without changing the position or exchanging the cutting blade body. By exchanging only the inexpensive cutting blade tip body 13 with the base chuck body 12 still attached, the damaged cutting surface of the used blade tip can be easily replaced with a new cutting surface at low cost. It is possible. As a result, the burden on the cutting device body 1 itself is reduced, the number of failures is reduced, and the running cost is surely reduced. In particular, it is possible to achieve a large cost reduction as compared with the related art.

The base chuck body 12 has notches 12B formed in a step-like shape by leaving a substantially L-shaped protrusion 12A on the end surface of the cutting side, and upper and lower end side surfaces along the longitudinal direction. Since the cutting blade tip body 13 made of a die steel material having the cutting surface as the cutting surface is mounted and fixed to the notch portion 12B with the cutting surface slightly protruding to the outside of the protrusion 12A, the base chuck body 12 The cutting blade tip body 13 can be easily attached to and detached from the cutting blade tip body 13 and the projecting length of the cutting blade tip body 13 with respect to the upper and lower base chuck bodies 12 is slightly increased so that the cutting blade tip bodies 13 can be more easily meshed with each other. It is possible to make it deep, and it is possible to perform a cutting operation without cutting the reinforcing bar P. In addition, for example, a custom-made cutting blade tip body 1 such as a screw blade or a round blade tip
No need for a special machine because even 3 can be replaced quickly.

On the inner wall surface side of the cutout portion 12B at the lower end of the protrusion 12A, between the corner edge surface side in the longitudinal direction of the cutting blade tip body 13 mounted and fixed in the cutout portion 12B and the inner wall surface of the cutout portion 12B, Since the groove portion 12C is formed to form the burr accommodating space portion Q for releasing the burr generated at the corner edge portion of the cutting blade tip body 13 after use, after the cutting blade tip body 13 has been used many times. When replacing the cut surface of the
It is possible to easily store the burr generated in the corner edge portion of the cutting blade tip body 13 after use, and to prevent damage to the inner wall surface of the cutout portion 12B due to the burr.

[Brief description of drawings]

FIG. 1 is a schematic front view of a reinforcing bar cutting device according to an embodiment of the present invention.

FIG. 2 is a view showing a structure of a fixed blade base or a movable blade base, a base chuck body attached to each of the double blade bases, and a cutting blade tip body attached to the base chuck body. 3 is an exploded perspective view of the state of FIG. 3B, and FIG. 3B is a perspective view of the state after assembly.

FIG. 3 is a cross-sectional view seen from the front showing a cutting use state of the reinforcing bar cutting device.

[Explanation of symbols]

P ... Reinforcing bar Q ... Burr receiving space 1 ... Cutting device main body 2 ... Fixed blade base 3 ... Movable blade base 4 ... Standing surface portion 5 ... Bottom groove portion 6 ... Mounting portion 7 ... Vertical drive portion 11 ... Cutting blade body 12 ... Base chuck Body 12A ... Projection 12B ... Notch 12C ... Groove 13 ... Cutting blade chip body 14 ... Screw hole 15 ... Screw through hole 16 ... Countersunk screw body 17 ... Screw hole 18 ... Screw through hole 19 ... Cylindrical screw body

Claims (3)

[Claims] 1. A fixed blade base to which one cutting blade body is fixed, and a movable blade base to which the other cutting blade body is fixed so that the cutting blade body can be driven and operated in a direction toward or away from the fixed blade base. ,
A cutting blade structure in a reinforcing bar cutting device that is provided so that the cutting blades can be rubbed against each other by being displaced in the longitudinal direction of the reinforcing bar arranged between both cutting blades, and the cutting blade is a double-edged blade. Reinforcing bar cutting, characterized by comprising a base chuck body which is always fixed to each table, and a cutting blade tip body having a plurality of cutting surfaces, the cutting surfaces of which are changeably mounted on the base chuck body. Cutting blade structure in the device. 2. The base chuck body has notches formed in a stepped shape while leaving a substantially L-shaped projecting portion on the cutting-side end edge surface, and has upper and lower end side surfaces along the longitudinal direction. The cutting blade in a rebar cutting device according to claim 1, wherein the cutting blade tip body made of a die steel material serving as a cutting surface is mounted and fixed to the notch with the cutting surface slightly protruding outside the protruding portion. Body structure. 3. The cutting blade tip on the inner wall surface side of the notch at the lower end of the protruding portion, after use, between the corner edge surface side in the longitudinal direction of the cutting blade tip body mounted and fixed in the notch portion and the inner wall surface of the notch portion. 3. A grooved portion is formed to form a burr accommodating space portion for releasing burr generated at a corner edge portion of the body.
A cutting blade structure in the rebar cutting device described.