JPH0723131Y2 - Shaped steel cutting tool - Google Patents

Description

[Detailed description of the device]

[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.

[0004]

However, in the former case of the gold saw of the above-mentioned conventional examples, 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, and burrs occur and the finish is bad, and sparks during work. There is a problem that there is a risk of causing Also, in the latter case, only right-angle cutting is possible, and in order to perform oblique angle cutting, there is an inconvenience that a plurality of tools corresponding to respective angles are required.

The present invention has been researched and developed with the object of solving the above-mentioned problems, and it is possible to easily and accurately cut a shaped steel, which is a deformed member, at a required angle with a single cutting tool. It is an object of the present invention to provide a cutting tool for shaped steel, which has features such as excellent properties and does not require a power source.

[0006]

As a means for solving the above-mentioned problems and achieving the object, in the present invention, a cutting tool main body and a cutting rotatably pivoted vertically on a front portion of the main body of the cutting tool. 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. Has developed a cutting tool for shaped steel that is constructed by 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 part 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. We have respectively developed cutting tools for shaped steel that are equipped with detachable fixing means to fix the insertion slit of the cutting blade to the position of the cutting blade.

[0008]

In the above construction, the cutting rod is rotated upward to laterally insert and hold the shaped steel, which is the object to be cut, into the insertion holding groove penetrating the holding member. Is appropriately rotated to select the insertion slit of the cutting blade at the position corresponding to the required cutting angle of the shaped steel, and the slit is positioned directly below the cutting blade.

After that, the holding member is held in this position by hand or by using an appropriate fixing means, and the cutting operation rod is rotated downward to push the cutting blade into the slit, whereby the shaped steel has a predetermined shape. It is possible to obtain a shaped steel with a certain angle at the end and a required angle at the end.

[0010]

Embodiments of the present invention will be described below with reference to the accompanying drawings. The cutting tool for shaped steel according to the present invention is 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
Its tip is pivotally attached to the upper end of the supporting rod 6 through a deformed connecting member 12 so as to be vertically rotatable, and is fixed by a fixing pin 13 which can be inserted and removed when not operating, and an operating rod. A roller 1 for pressing the guide member 14 of the cutting blade 4 and the upper edge of the cutting blade 4 against the deformed connecting member 12 on the lower side of the roller 1.
5 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 bulging arc surface shape, and one side at a substantially middle portion in the front-rear direction. From one side to the other side, an insertion holding groove 16 of a shaped steel having a side shape that matches the side shape of the shaped steel that is the object to be cut and having an upper portion opened to the upper surface of the holding member 3 is provided so as to penetrate therethrough. Shaped steel insertion guide members 17, 17 having an inner surface that matches the side surface shape of the groove 16 are provided at positions on both sides of the holding groove 16.

Further, the holding member 3 is such that a center base portion 18 at the front end portion thereof is pivotally attached to the above-mentioned mounting surface 8 of the main body 1 so as to be freely pivotable, and the rear side of the pivot portion. Part of the holding member 3 and penetrates the upper and lower surfaces thereof, and in this embodiment, the cutting blade 4
The three insertion slits 19 for inserting the are formed by changing the angle from the slit 19 in the right angle direction in the middle portion by 45 degrees to the left and right.

Furthermore, the holding member 3 has a bulging arc-shaped peripheral edge that coincides with the position where each of the insertion slits 19 is formed, and the tip end portion of the pin-shaped engaging member 10 on the main body 1 side. The engaging recesses 20 for engaging with each other are provided, and when the holding member 3 is rotated, any one of the engaging recesses 20 is urged by a spring 9 into the engaging recesses 10. The tip end is press-fitted and engaged so that the holding member 3 can be fixed at a predetermined position.

Further, as shown in FIG. 2 and the like, the cutting blade 4 in this embodiment is provided with a concave arcuate blade edge 21 on the lower side, and is provided with pivoting projections 22 and 23 on both sides. The rear side protruding piece 22 to the intermediate frame 5a of the main body 1.
Opposite elongated hole 26 side of connecting piece 25, which is pivotally attached to the upper side, and is connected with front side protruding piece 23 by loosely fitting the rotation shaft of pressure roller 15 provided on operation rod 2 to elongated hole 24 side. By being pivotally attached to the holding member 3 by means of a knob pin 27, the holding member 3 is rotatably provided in the upper and lower portions, and thus the cutting tool for shaped steel according to the embodiment of the present invention is constructed. It was done.

Next, an example of the usage state of the above embodiment will be described together with its function and effect. First, the fixing pin 13 of the cutting operating rod 2 is pulled out to the side, and the cutting blade 4 is raised while raising the operating rod 2.
When the pin 27 is pulled backward, the cutting blade 4 pivots on the holding member 3 to open the insert holding groove 16 of the shaped steel as shown in FIG. The protrusion 23,
The guide member 14 and the pressure roller 15 on the side of the operating rod 2 are arranged as shown in FIG.

Next, the lever 11 for setting 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.
9 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 20
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 16 of the holding member 3 along the inner side surface of the guide member 17, the operating rod 2 is pushed slightly forward as shown in FIG. When taken out, the projecting piece 23 of the cutting blade 4 and the guide member 1 on the operating rod 2 side
4 and the pressure roller 15 are moved and arranged through the elongated hole 24 of the connecting piece 25 as shown in the figure, and the pressure roller 15 contacts 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 guide member 14 and the pressure roller 15, and the cutting edge 21 thereof.
With this, the shaped steel T is surely cut at an angle along the set slit 19, 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, After the work is completed, the handle fixing pin 13 is inserted to complete the work.

In the above cutting operation, the shaped steel holding member 3 is fixed to the main body 1 through the engaging member, and the cutting edge 4 of the cutting blade 21 is the guide member 14 on the operating rod 2 side and pressed. Since it is reliably inserted into the setting slit 19 via the roller 15, there is no possibility of making an angle cutting error in the shaped steel,
The finish of angle cutting can be kept good.

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 setting angle and the number of slits 19 can be freely selected and held. The member 3 can be fixed by a hand other than the engaging and fixing member, that is, the purpose of the invention can be achieved, and various design changes can be made without departing from the gist of the invention.

[0023]

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

The shaped steel, which is a deformed member, can be markedly easily and accurately cut at a required angle, has a good cutting finish, and does not require a power source.

Since it is convenient to perform a desired angle cutting with a single cutting tool, the angle cutting of a shaped steel can be achieved economically and efficiently, 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.

[Explanation of symbols]

 1 Cutting Tool Main Body 2 Cutting Rod 3 Shaped Steel 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 Insertable / removable fixing pin 14 Guide member 15 Pressure roller 16 Insertion holding groove 17 Insertion guide member 18 Center base of front end of holding member 19 Insertion slit 20 Engagement recess 21 Cutting edge 22 ・ 23 Pivoting piece 24 Long Hole 25 Connection piece 26 Anti-long hole side 27 Knob pin T-shaped steel

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-56-9119 (JP, A) Fukukaihei 4-125520 (JP, U)

Claims (3)

[Scope of utility model registration request] 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 insertion slits for a plurality of cutting blades are radially formed from the vicinity of the pivot portion to both upper and lower surfaces of the holding member, and the holding member is held. A shaped-steel cutting tool formed by penetrating a shaped-steel insertion holding groove across both sides of a member. 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.