JPH0740134A - Cutting tool for shape steel - Google Patents

Abstract

PURPOSE:To provide a shape steel cutting tool with which a shape steel, that is a member having irregular shapes, can be cut easily and accurately, at a required angle, which gives an excellent cutting finish, and which needs no power supply. CONSTITUTION:This cutting tool consists of a cutting tool main body 1, a cutting operation lever 2, which is pivotally mounted in the front part of the main body 1 in a freely rotatable manner in the vertical direction, a shape-steel holding member 3, which is arranged flat on the main body 1, and a cutting blade 4, which is arranged over the holding member 3. The holding member 3 is pivotally mounted on the main body 1 in such a manner that the member 3 can freely and flatly rotate. At the same time, a plurality of slits for inserting the cutting blades 4 ranging from the neighborhood of the pivoting part to both (upper and lower) surfaces of the holding member 3 are formed radially, while a groove 15 for allowing insertion and holding of the shape steel is provided, across both sides of the holding member 3. In addition, a cutting work restricting member 21 having a required length for running along the longitudinally direction projectingly provided in the middle part in the width direction of a flat blade surface of the cutting blade 4.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cutting tool for shaped steel, and more particularly to a tool capable of easily and accurately cutting shaped steel at a desired angle.

[0002]

2. Description of the Related Art Conventionally, for example, a dedicated tool capable of accurately and easily cutting a structural steel for a facility on a ceiling at a required angle other than a right angle corresponding to the protruding corner and the entering corner has not yet been developed. At present, the cutting is done with a gold saw, an electric cutter, a grinder or the like.

Further, as in Registered Design No. 840474, a shaped steel holding member is fixedly mounted on the cutting tool body, and the shaped steel is inserted into a shaped steel holding groove penetrating the side of the holding member. hand,
A tool for cutting a shaped steel at a right angle by a cutter is also known.

Further, although not yet known, a cutting tool main body, which has been previously filed by the applicants of the present invention, and a cutting operation rod pivotally attached to a front portion of the main body so as to be vertically rotatable. In a shaped steel cutting tool comprising a shaped steel holding member arranged in a plane on the main body and a cutting blade arranged on the upper side of the holding member, the holding member can be rotated in a plane on the main body. A plurality of cutting blades extending from the vicinity of the pivotal portion to the upper and lower surfaces of the holding member in a radial shape, and the shaped steel insertion holding groove extending over both sides of the holding member. There exists a cutting tool for shaped steel, which is formed by penetrating the above.

[0005]

However, in the case of the gold saw of the first conventional example, not only labor and time are required, but also angle cutting is difficult and the shape of the cut portion is deformed to cause burrs. There is a problem that occurs, and in the case of the electric type, it requires a power source, it is not possible to work on the scaffolding at the construction site, and burns, burrs, burrs occur and the finish is bad, and sparks during work There is a problem that there is a risk of causing Further, in the case of the second conventional example, only right-angle cutting is possible, and there is an inconvenience that a plurality of tools corresponding to respective angles are required to perform diagonal angle cutting.

Further, in the case of the above-mentioned third prior art, based on its unique structure, it is possible to easily and efficiently cut the shaped steel, which is a deformed member, at a required angle with a single cutting tool. Although it has an advantage, for example, when the shaped steel is cut at an inclination angle of 45 degrees, the cut end face may be slightly deformed due to the following reason.
It is difficult to make accurate butt joints when two cutting surfaces of two pieces are butted at right angles to form a mounting frame material such as a ceiling plate, and the deformed and cut shaped steel is retained. This may cause a serious problem that it is difficult to smoothly move the shaped steel in the member in the holding groove.

To explain the reason why the above problems occur, since the cutting edge a of the cutting tool of this type of shaped steel is a flat blade b as shown in FIGS. 14 and 15, For example, when the shaped steel c is cut by the cutting blade a at an inclination angle of 45 degrees, the flat blade b of the cutting blade a is cut as shown in FIG.
The outer portion b ₁ of the inclined direction starts cutting in Nyuha outside edges c ₁ of the shaped steel c, Nyuha inner portion b ₂ of the flat blade b relative to the inner sides c ₂ forms steel c is slightly However, it will be delayed.

As described above, when there is a deviation in the blade insertion timing of both sides b ₁ and b ₂ of the flat blade b, as shown in FIG.
As shown in (b) and (c), the outer portion b ₁ of the flat blade b
The outer edge c ₁ of the shaped steel c, which is previously cut by the above method, is correctly cut without being deformed.
And flat blade surface pressing of the cutting blade a top surface of the edge c ₃ of section steel c located insertion slot d of the cutting blade a, as shown in 7 of (b), the inner sides c ₂ of section steel c Since a twisting pressure is applied to the inner side c ₂ of the cut shaped steel c, the inner side c ₂ is twisted and deformed as shown in FIG.

[0009]

DISCLOSURE OF THE INVENTION The present invention has been researched and developed with the object of solving the above-mentioned problems, and can easily and accurately form a shaped steel which is a deformed member at a required angle with a single cutting tool. An object of the present invention is to provide a cutting tool for shaped steel, which can be cut into pieces, has a good cutting finish and does not require a power source.

[0010]

According to the present invention, as means for solving the above problems and achieving the object, a cutting tool main body and a cutting tool pivotally attached to a front portion of the main body in a vertically rotatable manner. A shaped steel cutting tool comprising an operating rod, a shaped steel holding member arranged in a plane on the main body, and a cutting blade arranged on the upper side of the holding member. And a plurality of cutting slits radially extending from the vicinity of the pivotal portion to the upper and lower surfaces of the holding member in a radial shape, and the shaped steel spans both sides of the holding member. A cutting tool for shaped steel has been developed in which a cutting regulating member of a required length along the longitudinal direction is provided in a projecting manner in the middle of the flat blade surface of the cutting blade in the width direction while penetrating the insertion holding groove of .

Further, according to the present invention, in the shaped steel cutting tool configured as described above, a shaped steel cutting tool in which the upper portion of the insertion holding groove is opened on the upper surface of the holding member, and a desired shape is formed on the holding member. Cutting tool for shaped steel with detachable fixing means for fixing the insertion slit of the cutting blade to the position of the cutting blade, and for shaped steel in which the sectional shape of the cutting regulating member is tapered. We have developed a cutting tool and a cutting tool for shaped steel in which the cross-sectional shape of the cutting regulation member is formed in a square shape.

[0012]

In the above structure, the cutting rod 2 is pivoted upward to laterally insert the shaped steel T, which is the object to be cut, into the insertion holding groove 15 penetrating the holding member 3. After that, the holding member 3 is appropriately rotated to select the insertion slit 18 of the cutting blade 4 located at a position corresponding to the required cutting angle of the shaped steel T, and the slit 18 is positioned immediately below the cutting blade 4. Let

After that, the holding member 3 is held at that position by hand or by using an appropriate fixing means, and the cutting operation rod 2 is rotated downward to push the cutting blade 4 into the slit 18. The shaped steel T is reliably cut at a predetermined angle, and a shaped steel having a required angle at its end is obtained.

Further, on the flat blade surface of the cutting blade 4, a cutting regulating member 21 having a required length along the longitudinal direction is formed in the middle portion in the width direction thereof.
Since the cutting regulation member 21 is shown in FIG.
If it has a tapered shape as shown in FIG. 7, it can be cut smoothly and correctly according to the modes shown in (a), (b) and (c) of FIG. That is, for example, when cutting the shaped steel T at an inclination angle of 45 degrees, when the cutting blade 4 is inserted into the insertion slit 18 formed in the holding member 3 of the shaped steel and lowered,
As shown in FIG. 12B, first, the cutting regulation member 21
The tip portion of the cutting edge 4 collides with the middle portion of the shaped steel T located in the slit 18 to bend the portion, and the flat blade 20 of the cutting blade 4
Outer edges 20a of the inclined direction of the start to cut in Nyuha outside edge T ₁ of the shaped steel T.

Next, when the cutting blade 4 is further lowered, as shown in FIG.
As shown in (C) of FIG. 2, the degree of bending of the shaped steel T is increased to maintain a reliable engagement state with the tip end portion of the cutting regulation member 21, so that the shaped steel T descends the cutting blade 4 due to this engagement. Regulated by the action, no twisting pressure or strain pressure is applied to the inner side T ₂ of the shaped steel T, so that the outer side 20b of the cutting blade 4 on the side opposite to the tilt direction of the flat blade 20 is shaped steel T. The inner side T _{2 of} is properly cut.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. The cutting tools for shaped steel according to the present invention are roughly classified into a cutting tool body 1 and a top and bottom portion of the cutting tool body 1. From a cutting operation rod (handle) 2 pivotally attached in a rotatable manner, a shaped steel holding member 3 arranged in a plane on the main body 1, and a cutting blade 4 arranged above the holding member 3. It is configured.

The cutting tool body 1 has a support rod 6 standing upright on the tip of the base frame 5, and a through hole 7 formed in the middle of the front half of the base frame 5. A mounting surface 8 of the steel holding member 3 and an intermediate portion of an intermediate frame 5a located on the rear side of the mounting surface 8 are fitted so as to be able to move forward and backward, and normally urged forward by a spring 9. And an engaging member 10 made of a pin for engaging the tip of the engaging member with an engaging recess of a holding member 3 to be described later, and a lever 11 for retracting the engaging member 10 to release the engagement. ing.

Further, the cutting operation rod (handle) 2 is
The tip of the cutting blade 4 is pivotally attached to the upper end of the support rod 6 through the deformed connecting member 12 so as to be vertically rotatable, and the guide blade of the cutting blade 4 is guided to the deformed connecting member 12 below the operating rod 2. A roller 14 that presses the upper edge of the portion 13 and the cutting blade 4 is provided and configured in the illustrated arrangement mode.

Further, the shaped steel holding member 3 is composed of a substantially fan-shaped flat block member having a rear side edge formed in a bulged arc surface shape, and one side at a substantially middle portion in the front-rear direction. From the other side to the other side, a shaped steel insertion holding groove 15 having a side shape matching the side shape of the shaped steel to be cut and having an upper portion opened on the upper surface of the holding member 3 is further provided. Shaped steel insertion guide members 16 and 16 having an inner side surface matching the side surface shape of the groove 15 are provided corresponding to both side positions of the holding groove 15.

Further, the holding member 3 is such that the center base portion 17 of the front end portion of the holding member 3 is rotatably pivoted on the mounting surface 8 of the main body 1 so as to be rotatable, and the rear side of the pivoting portion. Part of the holding member 3 and penetrates the upper and lower surfaces thereof, and in this embodiment, the cutting blade 4
The insertion slits 18 for inserting three strips are formed by changing the angle from the slit 18 in the right-angled direction in the middle portion to the right and left by 45 degrees.

Furthermore, the holding member 3 has a bulging arc-shaped edge corresponding to the position where each of the insertion slits 18 is formed, and the tip end portion of the pin-shaped engaging member 10 on the main body 1 side. The engaging recesses 19 for engaging with each other are provided respectively, and when the holding member 3 is rotated, one of the engaging recesses 19 is biased by the spring 9 into the engaging recess 19. The tip end is press-fitted and engaged so that the holding member 3 can be fixed at a predetermined position.

Further, the cutting blade 4 is, in the present embodiment, the middle portion in the width direction of the flat blade surface of the concave arc-shaped flat blade 20 formed in the lower side, as clearly shown in FIGS. 9 to 11. In addition, a cutting regulation member 21 of a required length along the longitudinal direction is provided in a protruding manner, and the cutting regulation member 21 is formed in a tapered cross-sectional shape.

Further, the cutting blade 4 is constructed by providing projecting pieces 22 and 23 pivotally mounted on the front and rear thereof, and the projecting piece 22 on the rear side is pivotally mounted on the intermediate frame 5a of the main body 1 and The protruding piece 23 on the side is connected to the long hole 24 side to the opposite long hole side 26 of the connecting piece 25 in which the rotation shaft of the pressure roller 14 provided on the operating rod 2 is loosely fitted and connected, via the pin 27. It is pivotally attached to the upper part of the holding member 3 so as to be vertically rotatable, and thus the cutting tool for shaped steel according to the embodiment of the present invention is constructed.

Next, an example of the usage state of the above embodiment will be described together with its function and effect. First, when the knob pin 27 of the cutting blade 4 is pulled backward while raising the cutting operation rod 2, the cutting blade 4 rotates on the holding member 3 and the insertion holding groove 15 of the shaped steel is formed as shown in FIG. While being opened, one of the pivotally mounted projections 23 of the cutting blade 4, the guide portion 13 on the side of the operating rod 2 and the pressure roller 14 are arranged as shown in FIG.

Next, the setting lever 11 is pushed down and the pin-shaped engaging member 10 is retracted against the biasing spring 9, and then the insertion slit 1 corresponding to the required cutting angle of the shaped steel.
8 is selected, the holding member 3 is rotated so that the slit is directly below the blade cutting blade 4, and after matching both positions, the lever 11 is released and the engaging member 10 is engaged with the holding member 3. Recess 19
The holding member 3 is fixed onto the main body 1 by press-fitting and engaging with.

Next, after the shaped steel T is inserted and held in the insertion holding groove 15 of the holding member 3 along the inner side surface of the insertion guide member 16, the operating rod 2 is slightly moved forward as shown in FIG. When extruded, the projecting piece 23 of the cutting blade 4, the guide portion 13 on the operating rod 2 side, and the pressure roller 14 are moved and arranged as shown in FIG. 14 abuts on the protruding piece 23 of the blade cutting blade 4.

When the operating rod 2 is pushed downward in this state, the cutting blade 4 is smoothly rotated and lowered to the position shown in FIG. 2 via the pressure roller 14, and the cutting blade 4 is cut as described in the section of the operation. Both outer edges 20a, 20 of the flat blade 20 are inserted through the cutting regulation member 21 projecting from an intermediate portion of the flat blade 20 of the blade 4.
By b, the shaped steel T is surely cut at an angle along the slit 18, and the chips generated at this time are discharged to the outside through the through hole 7 of the holding member and the bottom opening 5b of the base frame 5, The cutting work is completed.

That is, when the shaped steel T is cut at an inclination angle of 45 degrees, for example, when the cutting blade 4 is inserted into the insertion slit 18 formed in the holding member 3 of the shaped steel and lowered, FIG.
(B), the tip of the cutting regulation member 21 first comes into contact with the middle portion of the shaped steel T located in the slit 18 to bend the portion, and the flat blade of the cutting blade 4 inclination direction of the outer edge 20a of 20 begin to cut in Nyuha outside edge T ₁ of the shaped steel T.

Next, when the cutting blade 4 is further lowered, as shown in FIG.
As shown in (C) of FIG. 2, the degree of bending of the shaped steel T is increased to maintain a reliable engagement state with the tip end portion of the cutting regulation member 21, so that the shaped steel T descends the cutting blade 4 due to this engagement. Regulated by the action, no twisting pressure or strain pressure is applied to the inner side T ₂ of the shaped steel T, so that the outer side 20b of the cutting blade 4 and the flat blade 20 on the side opposite to the tilt direction is the shaped steel T. Inside edge T
Cut ₂ correctly.

In the above cutting operation, the cutting regulation member 2
Since 1 is provided in the middle portion of the flat blade 20, it is possible to perform the above-mentioned smooth and correct cutting regardless of the left and right inclination angles, and the holding member 3 of the shaped steel T is provided with an engaging member. Fixed to the main body 1 and the flat blade 20 of the cutting blade 4
Is surely inserted into the slit 18 via the pressure roller 14, so that an angle cutting error of the shaped steel does not occur,
The finish of angle cutting can be maintained more favorably.

13 (A), (B) and (C) show a cutting state according to a modified example of the cutting regulation member 21, in that the cutting regulation member 21 has a quadrangular sectional shape. It is different from the one already described, and the same figure (b),
As shown in (c), the cutting regulation member 21 having the rectangular cross section.
Has a flat blade-like cutting action and is one of the contact parts with shaped steel T.
Even if the portion is cut, there is no change in that the abutting portion with the shaped steel is bent and engaged, and the cutting regulation action similar to that described above is exerted. Therefore, the same parts as those shown in FIG. 12 are designated by the same reference numerals.

Although the main embodiments of the present invention have been described in detail above, the present invention is not limited to the above-mentioned embodiments. For example, the set angle of the slit 18, the set number, the shape of the cutting regulation member 21, and the like. Can be freely selected, and the holding member 3 can be fixed by a hand other than the engagement fixing member. In short, various designs can be achieved without departing from the gist of the invention. It can be changed.

[0033]

Since the cutting tool for shaped steel according to the present invention is constructed as described above and used as described above, it is superior to the conventional cutting tools described above in each step. It produces the following effects.

Shaped steel, which is a deformed member, can be markedly easily and accurately cut at a required angle, the cutting finish is good, and a power source is not required.

In particular, since a cutting regulation member of a required length along the longitudinal direction is provided in a projecting manner in the widthwise middle portion of the flat blade surface of the cutting blade, either of the left and right sides is based on the regulating function described above. Even if the angle of inclination in the direction is greater, the inclined cutting of the shaped steel can be achieved more accurately and the cutting finish can be achieved satisfactorily, and the smooth movement of the cut shaped steel in the insert holding groove of the shaped steel is completely hindered. Absent.

It is convenient to perform the desired angle cutting with a single cutting tool, and it is possible to economically and efficiently achieve the angle cutting of the shaped steel, and the insertion holding groove of the shaped steel is provided on the upper surface of the holding member. By making the opening in, it is possible to easily confirm the required cutting position of the shaped steel with a mark and prevent a cutting error.

[Brief description of drawings]

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

FIG. 2 is a vertical sectional view of a main part of FIG.

FIG. 3 is a partially omitted plan view in which a shaped steel is inserted and held.

FIG. 4 is a partially omitted plan view showing a state in which a shaped steel holding member is rotated to enable 45 ° angle cutting.

FIG. 5 is a front view showing an engaged state of a shaped steel holding member and an engaging member.

6 is a cross-sectional view taken along the line AA of FIG.

FIG. 7 is an explanatory diagram showing one arrangement mode of each member during a cutting operation.

FIG. 8 is an explanatory view showing another arrangement mode of each member at the time of cutting operation.

FIG. 9 is an enlarged front view of a cutting blade.

10 is a partially omitted cross-sectional view taken along the line BB of FIG.

11 is a partially omitted cross-sectional view taken along the line CC of FIG.

12 (a), (b), and (c) are explanatory views of the cutting regulation action by the cutting regulation member in the present invention.

13 (a), (b), and (c) are explanatory views of a cutting regulation action by another cutting regulation member in the present invention.

FIG. 14 is an enlarged front view showing an example of a cutting blade of a conventional cutting tool for shaped steel.

15 is a partially omitted cross-sectional view taken along the line DD of FIG.

16 is an enlarged perspective view of a section of the shaped steel by the cutting blade shown in FIG.

17 (a), (b), and (c) are explanatory views of a cutting state of the shaped steel by the cutting blade shown in FIG.

[Explanation of symbols]

1 Cutting Tool Main Body 2 Cutting Operation Rod 3 Holding Member 4 Cutting Blade 5 Base Frame 5a Intermediate Frame 5b Bottom Opening 6 Support Rod 7 Through Hole 8 Mounting Surface 9 Spring 10 Engagement Member 11 Lever 12 Deformed Coupling Member 13 Guide Part 14 Pressure roller 15 Insert holding groove 16 Insert guide member 17 Center base of front end of holding member 18 Insert slit 19 Engagement recess 20 Flat blade 20a Flat blade outer side 20b Flat blade outer side 21 Cutting regulation member 22 Pivoting No. 23 Projection piece 23 Pivoting piece 24 Long hole 25 Connecting piece 26 Opposite long hole side 27 Knob pin T Shaped steel T ₁ Outer side of shaped steel located in insertion slit T ₂ Inner side of shaped steel located in insertion slit

Claims (5)

[Claims] 1. A cutting tool main body, a cutting operation rod pivotally attached to a front portion of the main body so as to be vertically rotatable, a shaped steel holding member arranged in a plane on the main body, and a holding member of the holding member. In a cutting tool for shaped steel composed of a cutting blade arranged at the top,
The holding member is pivotally attached to the main body so as to be rotatable in a plane, and the insertion slits of a plurality of cutting blades extending from the vicinity of the pivot portion to the upper and lower surfaces of the holding member are radially formed, and the holding member is held. It is configured by penetrating an insertion holding groove of shaped steel across both sides of the member and projecting a cutting regulation member of a required length along the longitudinal direction at the widthwise intermediate portion of the flat blade surface of the cutting blade. Cutting tool for shaped steel. 2. The cutting tool for shaped steel according to claim 1, wherein the upper portion of the insertion holding groove is opened on the upper surface of the holding member. 3. The cutting tool for shaped steel according to claim 1, further comprising detachable fixing means for fixing the insertion slit of a desired cutting blade formed in the holding member in conformity with the position of the cutting blade. 4. The cutting tool for shaped steel according to claim 1, wherein the cutting regulation member has a tapered cross-sectional shape. 5. The cutting tool for shaped steel according to claim 1, wherein the cutting regulation member is formed in a rectangular cross section.