JP2810653B2 - Cutting and bending angle free cutting machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cutting machine for cutting an angle steel or a square steel pipe using a band saw blade, and more particularly to a cutting machine for cutting a work such as an angle steel or a square steel pipe at right angles to a work mounting table. Not only that, it is possible to cut the work so that the cut surface of the work is inclined to the left or right diagonal direction without moving the work or the work mounting table, and to be able to quickly and neatly bend the work. The present invention relates to a cutting and bending angle free cutting machine capable of performing notch cutting at an arbitrary angle while leaving a work lower surface portion in contact with a work mounting table.

[0002]

2. Description of the Related Art Conventionally, this type of cutting machine cuts a work at a right angle to a work mounting table, or a work cutting table rotatably supported at a predetermined cutting angle. And the like are cut so that the cut surface of the work is inclined at a predetermined angle in a diagonal left or right direction.

However, in a conventional cutting machine,
The workpiece can only be cut so that the cut surface of the workpiece is inclined leftward or rightward by a predetermined angle. For example, when the rectangular steel pipe 101 is to be bent at a right angle as shown in FIG. The steel pipe 101 is cut so as to be inclined at a cut surface of 45 degrees, the cut surfaces of the cut square steel pipe 101 are opposed to each other at a bending angle of 90 degrees, and four cut surfaces are joined by welding or the like. Must. As described above, while maintaining the posture of the work so that the cut surfaces of the rectangular steel pipes 101 do not shift, it is quite possible to join the four cut surfaces by welding or the like and finish each welded portion. This is troublesome, and all the welded parts are exposed, so that the appearance is not beautiful.

[0004] Further, when the work mounting table is turned to a predetermined cutting angle to cut the work so as to be inclined at a predetermined angle, the work is a long object,
In some situations, such as when the installation space of the cutting machine is narrow, it may be difficult to rotate the work mounting table to mount the work.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned problems, and it is an object of the present invention to make a work such as an angle steel or a square steel pipe perpendicular to a work mounting table. In addition to being able to cut the workpiece, the workpiece can be cut so that the cut surface of the workpiece is inclined diagonally left or right without moving the workpiece or the workpiece mounting table, and the bending of the workpiece can be performed quickly and neatly. An object of the present invention is to provide a cutting machine capable of performing notch cutting at an arbitrary angle while leaving a work lower surface portion in contact with the work mounting table so as to be able to perform cutting.

[0006]

Means for Solving the Problems The present invention takes the following technical means in order to solve the above problems.

That is, a work mounting table provided on a base for horizontally mounting and fixing a work, a side wall erected on a side edge of the base opposed to the work mounting table, and a work portion via a holder portion. An arm for supporting the saw-tooth housing, comprising a drive wheel driven by an electric motor and a saw-tooth housing equipped with a band saw-tooth wound around a driven wheel attached to a side wall so as to be orthogonal to the mounting table. The connected housing shaft is pivotally supported by the holder portion so that the band saw tooth mounted on the saw tooth housing can swing vertically with respect to the work, and the band saw tooth is on the same horizontal plane as the work mounting table. The holder shaft that supports the holder part is locked with the position reaching the upper side as a lower limit, and the saw shaft is turned obliquely to the left and right with respect to the base. The holder is supported by the side wall so as to be freely movable, is locked at an arbitrary angle setting position, and the holder shaft supporting the holder portion is capable of adjusting the cutting depth of the band saw tooth with respect to the work. The cutting machine is configured to be freely movable in the vertical direction along the side wall.

Further, on the side of the side sawtooth housing,
Starting from both ends of the holder portion rotatably supported on the side wall via a holder shaft, an angle scale plate capable of setting the band sawtooth to an arbitrary angular position on the left and right, and both ends of the holder portion are set on the left and right, respectively. Angle setting means consisting of a pair of stoppers fixed at an angular position is attached,
A guide long hole through which the holder shaft is inserted and guides the shaft slidably in the vertical direction,
A cutting depth scale that can be set so that the band saw tooth is at an arbitrary cutting depth position with respect to the work with respect to the work mounting table, and a holder shaft inserted into the guide elongated hole, and a set cutting depth. A cutting angle-adjustable cutting machine according to claim 1, wherein cutting depth setting means comprising a vertical moving mechanism for moving and fixing to a position is attached.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment according to the present invention will be described below in detail with reference to the drawings.

As shown in FIGS. 1 and 2, a cutting machine 1 according to the present invention comprises a base 3 and a work mounting table 7 provided on the base 3 for mounting and fixing a work 5 horizontally. A side wall 9 erected on a side edge of the base 3 facing the work mounting table 7, and a drive wheel 11 running by driving an electric motor.
And a saw tooth housing 17 provided with a band saw tooth 15 wound around the driven wheel 13.

A table 19 for horizontally mounting the work 5 such as an angle steel or a square steel pipe in a direction orthogonal to the saw tooth housing 17 extends on the work mounting table 7, and a fixed vise 21 is placed on the table 19. And a moving vise 25 which is moved back and forth by screws by operating the handle 23, and clamps and fixes the work 5 from both sides. A band saw tooth 15 protruding from the saw tooth housing 17 is provided on the table 19 when the work 5 is cut.
The U-shaped groove 27 is formed so as not to contact with the groove 9.

At the front end of the sawtooth housing 17, a workpiece 5
A handle 29 for moving the saw-tooth housing 17 up and down to cut the saw blade 17 is attached, and an arm 33 that supports the saw-tooth housing 17 is fixed to a rear end of the handle 29 via a holder 31 described later.

The holder section 31 supports the arm 33 mounted on the sawtooth housing 17 via a bearing so as to be vertically swingable with respect to the work mounting table 7. The arms 33 are urged upward by springs 37 attached to the left and right ends of the housing shaft 35 via the arms 33, respectively, and when the saw-tooth housing 17 is to be pushed down for cutting, as shown in FIG. In addition, a stopper 39 attached to one end of the housing shaft 35 is rotatably supported on the same side of the holder part 31 and is locked by a locking piece 43 locked by a locking projection 41, and a saw tooth Band saw tooth 15 provided in housing 17
However, the lower limit is set at a position reaching the same horizontal plane as the work mounting table 7.

The hooking projection 41 is formed by rotating the locking piece 43 to the right and suspending the hanging piece 43 so that the band saw tooth 15 provided on the saw tooth housing 17 is formed in the U-shaped groove 2 recessed in the work mounting table 7.
At a depth position required for cutting the work 5 in 7, a stopper 39 is attached so as to stop. In addition, locking piece 4
A bolt 45 is screwed onto the tip of the band saw 3 to adjust the locking position of the stopper 39 and the locking piece 43, that is, the lower limit position of the band saw tooth 15. The bolt 45 is tightened or loosened to tighten the band saw tooth 15. Fine-tune the lower limit position.

The holder section 31 has a holder shaft 47 fixed to the back of the holder section 31 so that the band saw blade 15 provided on the saw blade housing 17 can be rotated obliquely to the left and right with respect to the work table 7. , Is supported by the side wall 9 via a bearing 49, and is screwed to the side wall 9 by a nut 53 via a washer 51.

As shown in FIG. 4, a long guide hole 55 is formed in the side wall 9 for inserting the holder shaft 47 and guiding the shaft slidably in the vertical direction. When the holder shaft 47 is located at the center of the guide slot 55, the band saw tooth 15 is located at the lower limit position, that is, on the same horizontal plane as the work mounting table 7, and can move vertically by the radius of the holder shaft 47. Formed on the side wall 9.

A flange 59 having a bolt hole 57 formed therein is projected from the rear surface of the side wall 9, and an insertion hole 61 through which the holder shaft 47 is inserted into the center of the bolt hole 57 is formed. A bolt 65 erected on the upper end 63a of the shaft holding plate 63 having an inverted L-shaped cross section is inserted.

By screwing and tightening a nut 69 to the bolt 65 via a washer 67, the holder shaft 47 is pulled up together with the shaft holding plate 63, and by loosening the nut 69, the holder shaft 47 It is pulled down together with the holding plate 63. In this case, the nut 53 screwed to the holder shaft 47 is loosened to such an extent that the shaft holding plate 63 becomes slidable.

As shown in FIG. 5, the band saw tooth 1 provided on the saw tooth housing 17 is provided on both sides of the shaft holding plate 63.
A cutting depth scale 71 is provided for setting 5 to be at an arbitrary cutting depth position with respect to the work 5 with the work mounting table 7 as a base point. The cutting depth scale 71
When the lower limit position where the band saw tooth 15 reaches the same horizontal plane as the work mounting table 7 is set as the base point 0, when the upper end 63a of the flange of the shaft holding plate 63 is located at the base point 0, the holder shaft 4
The scale is provided so that 7 is located at the center of the guide elongated hole 55, and an upward scale 71 a and a downward scale 71 b are provided at predetermined pitches above and below the base point 0.

The rear portion of the holder shaft 47 inserted in the guide slot 55 formed in the side wall 9 is externally threaded so that the band saw tooth 15 in the saw tooth housing 17 has a predetermined cutting depth. After that, it is fastened to the side wall 9 by the nut 53 via the washer 51.

On the front surface of the side wall 9, as shown in FIG. 6, an angle scale 77 is attached to the upper half of the bearing 49.
The holder shaft 47 is slid up and down along the side wall 9 as the holder shaft 47 moves up and down, and can be set at a predetermined angle regardless of the movement of the holder shaft 47. The angle scale plate 77 is located at a position where the band saw tooth 15 provided on the saw tooth housing 17 moves up and down at a right angle to the work mounting table 7, that is, the upper left and right upper ends 31 a and 31 b of the holder 31 are positioned with respect to the work mounting table 7. The positions that are parallel to each other are set as base points 90 degrees, and graduations are provided at predetermined pitches so as to be 80 degrees, 70 degrees to 10 degrees, and 0 degrees inward from the left and right ends.

The upper edge of the side wall 9 has an arc shape.
A slidable angle stopper 79 is attached to each of the left and right sides on the arc. The angle stopper 79 has a U-shape for holding the upper end of the side wall 9 and the angle scale plate 77. The holding piece 81 on the side wall 9 side has a concave groove 85 formed inside the upper end edge of the side wall 9. A fitting projection 82 is slidably fitted to the fitting, and a screw hole is formed in the holding piece 81 on the angle scale plate 77 side. It is designed to be fixed at the above set angle position. Holder upper end 31 pivotally supported by holder shaft 47
The a and 31b are respectively stopped by angle stoppers 79 set at right and left angles. Since the pair of angle stoppers 79 are attached to the angle scale plate 77, the holder upper ends 31a and 31b are respectively stopped by the angle stoppers 79 just by rotating the holder shaft 47, and FIG. It is possible to easily perform notch cutting while leaving the lower surface of the work 5 as shown in FIG.

The cutting machine 1 according to the present invention is used as follows.

First, when the work 5 is to be cut at a right angle, it is confirmed that the holder upper ends 31a and 31b are positioned at the scale of 90 degrees of the angle scale plate 77, and the locking piece 43 is moved rightward. Rotate and hang down the sawtooth housing 17
The handle 29 attached to is cut downward by cutting. The latching projection 41 is attached so that the band saw tooth 15 collides with the stopper 39 at a depth position required for cutting the workpiece 5 in the U-shaped groove 27 formed in the workpiece mounting table 7. Therefore, it is possible to sufficiently cope with ordinary right angle cutting.

When the work is cut at a right angle in a state where the locking piece 43 is hooked on the hooking projection 41, first, the nut 53 screwed to the holder shaft 47 is loosened, and the shaft holding plate 63 is removed. After confirming that the upper end 63a of the collar is positioned at the scale 0 of the cutting depth scale 71, the flange 59
The nut 69 screwed to the bolt 65 penetrating through is loosened, and the holder shaft 47 and the shaft holding plate 63 are
After being moved downward by about 2 mm in accordance with the lower scale 71b, the nut 53 screwed to the holder shaft 47 is fastened, and the handle 29 attached to the saw-tooth housing 17 is pressed down to cut.

When the workpiece 5 is to be cut so as to be inclined leftward or rightward, the angle scale 7
The angle stopper 79 is loosened by moving the wing bolt 83 of the angle stopper 79 to the set angle position 7 (so that the left and right sides are on the scale 0 side position), and the wing bolt 83 is tightened again.
9 is fixed. Then, by gripping the handle 29 and rotating the saw-tooth housing 17 in the left or right direction, in a state where the holder upper end portion 31a is in contact with the angle stopper 79,
The handle 29 is pushed down to make a left or right diagonal cut. Since the sawtooth housing 17 equipped with the band sawtooth 15 is pivotally supported by the holder shaft 47 so as to be rotatable obliquely to the left and right with respect to the work mounting table 7,
The oblique cutting can be performed without moving the workpiece 5, and the cutting of a long object is not affected by the size of the installation space.

In a normal oblique cutting of the square steel pipe 101 or the like, the nut 5 screwed to the holder shaft 47 is used.
The holder shaft 47 is pivotally supported by the bearing 49 by slightly tightening the shaft 3 so that the holder shaft 47 is rotatable. In addition, the angle scale plate 77 attached to the bearing 49, the shaft holding plate 63, the washer 51, etc. , It is possible to cut left or right obliquely without retightening or loosening the nut 53.

In this case, as described above, it is determined whether the cutting depth of the band saw tooth 15 is adjusted by rotating the locking piece 43 clockwise and drooping, or by the cutting depth scale 71. It can be selected appropriately.

When the rectangular steel pipe 101 is to be bent at a right angle as shown in FIG. 7A, first, the thickness dmm of the lower surface of the work 5 on the work mounting table 7 is measured.
Raised scale 71a of the cutting depth scale 71 on the rear surface of the side wall 9.
The dmm holder shaft 47 is lifted upward with respect to the scale 0 according to
Is locked with the lower position of dmm above the work table 7 as the lower limit. That is, the holder shaft 4
The nut 53 fastened to 7 is loosened slightly so that the shaft can be slid up and down, and a nut 69 screwed to a bolt 65 erected on the brim upper end 63a of the shaft holding plate 63 is tightened. The shaft holding plate 63 and the holder shaft 47 are dm according to the raising scale 71a.
m may be raised.

Next, the wing bolts 83 of the pair of angle stoppers 79 that slide on the upper edge of the side wall 9 are loosened, and the wing bolts 83 are fastened at the 45-degree positions provided on the right and left of the angle scale plate 77, respectively. Then, the angle stoppers 79 are fixed respectively.

Then, by gripping the handle 29 attached to the sawtooth housing 17 and rotating it to the left,
The holder upper end 31a is abutted against the angle stopper 79a, and the band saw blade 15 of the saw blade housing 17 is tilted at an angle of 45 degrees in the left diagonal direction. Done. At this time, since the band saw tooth 15 is locked with the lower limit of the position dmm above the work mounting table 7, the lower surface of the work 5 is not cut.

Similarly, by gripping the handle 29 and rotating it to the right, the holder upper end 31b is stopped by the angle stopper 79b and the saw-tooth housing 1
7B is tilted at an angle of 45 degrees in the oblique right direction, and the handle 29 is depressed, whereby the oblique right cut r shown in FIG. 7B is performed. At this time, since the band saw tooth 15 is locked with the lower position of dmm above the work mounting table 7 as a lower limit, the lower surface of the work 5 is not cut.

In this case, the work 5 is cut, bent and cut in a state in which the locking piece 43 is hooked on the hooking projection 41, and FIG.
The cutting and bending cutting of the angle steel shown in (c) can be performed in the same manner as described above.

Further, the band saw tooth 15 with respect to the lower surface of the work 5 is provided.
If the locking position of the locking piece 43 is not appropriate, the locking position between the stopper 39 and the locking piece 43, that is, the band saw tooth 15 The lower limit position of the cutting depth with respect to the work 5 can be finely adjusted.

According to the present invention, the work 5 such as an angle steel or a square steel pipe can be easily moved without moving the work 5 as shown in FIG.
Alternatively, it is possible to perform cutting and bending with a left or right diagonal direction while leaving the lower surface of the work 5 as shown in FIG. 7C, and as shown in FIG. The work 5 can be bent quickly and neatly.

When the angle of the band saw tooth 15 is set to 0 degree, the band saw tooth 15 is positioned in parallel with the work mounting table 7, and the work 101 as shown in FIG.
It is also possible to cut and bend.

Further, the band saw tooth 15 is measured by the cutting depth scale 71.
By setting the lower limit locking position to such an extent that it slightly bites into the lower surface thickness d of the work 5, the bent portion of the work 5 can be made more natural and beautiful.

The present invention is not limited to the above-described embodiment, but includes various means such as providing a vertical moving means on the work mounting table 7 for adjusting the cutting depth position of the band saw tooth 15 with respect to the work 5. Design changes are possible.

[0039]

Since the present invention is constructed as described above, in particular, it is possible to cut a work such as a square pipe at a right angle to the work mounting table, and also to move the work or the work mounting table. Instead, the workpiece can be cut such that the cut surface of the workpiece is inclined leftward or rightward. Therefore, even when the work is a long object, it is not necessary to change the installation state of the cutting machine.

Further, the left and right diagonal cutting and cutting can be performed at an arbitrary angle while the lower surface portion of the work in contact with the work mounting table is left, so that the work can be bent quickly and neatly.

[Brief description of the drawings]

FIG. 1 is a front view showing a cutting machine with an adjustable bending angle.

FIG. 2 is a side view with the same part omitted.

FIG. 3 is a schematic diagram showing a locked state of an arm.

FIG. 4 is a cut end view showing a state where a holder is attached to a side wall.

FIG. 5 is a partially omitted rear view showing a side wall.

FIG. 6 is a partially omitted front view showing a side wall.

FIG. 7A is a partially omitted perspective view showing a state where a square steel pipe is bent. (B) is a partially-omitted perspective view showing a state in which the lower surface of the rectangular steel pipe is cut and bent with the lower surface remaining. (C) is a partially omitted front view showing a state in which the lower surface of the angle iron is cut and bent while remaining.
(D) is a partially omitted perspective view showing another example of cutting and bending cutting.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cutting machine 3 Base 5 Work 7 Work mounting table 9 Side wall 11 Drive wheel 13 Follower wheel 15 Band saw tooth 17 Saw tooth housing 31 Holder part 31a, 31b Upper end part of holder 33 Arm 35 Housing shaft 37 Spring 39 Stopper 41 Locking projection 43 Lock Piece 45, 65 Bolt 47 Holder shaft 49 Bearing 53, 69 Nut 55 Guide long hole 57 Bolt hole 59 Flange 61 Insertion hole 63 Shaft holding plate 63a Upper end of cutting edge 71 Cutting depth scale 71a Up scale 71b Down scale 77 Angle scale 79, 79a, 79b Angle stopper 82 Fitting projection 83 Wing bolt

Claims (2)

(57) [Claims] 1. A work mounting table provided on a base for horizontally mounting and fixing a work, a side wall erected on a side edge of the base opposed to the work mounting table, and a work via a holder. An arm for supporting the saw-tooth housing, comprising a drive wheel driven by an electric motor and a saw-tooth housing equipped with a band saw-tooth wound around a driven wheel attached to a side wall so as to be orthogonal to the mounting table. The connected housing shaft is pivotally supported by the holder portion so that the band saw tooth provided in the saw tooth housing can swing vertically with respect to the work mounting table, and the band saw tooth is mounted on the work mounting table. The holder reaching the same horizontal plane is locked as a lower limit, and the holder shaft supporting the holder rotates the band saw blade obliquely to the left and right with respect to the work mounting table. The holder is supported by the side wall so as to be freely movable, is locked at an arbitrary angle setting position, and furthermore, a holder shaft supporting the holder part can adjust a cutting depth of the band saw tooth with respect to the work. The cutting angle is freely adjustable along the side wall as described above. 2. The band saw tooth can be set at an arbitrary angular position on both sides of the holder front side rotatably supported on the side wall via a holder shaft on the side of the front side saw tooth housing. Angle setting means comprising an angle scale plate and a pair of stoppers for fixing both ends of the holder portion at left and right set angular positions is attached, and a holder shaft is inserted into the rear surface of the side wall, and the shaft is slid vertically. A guide slot that movably guides, a cutting depth scale that can be set so that the band saw tooth is at an arbitrary cutting depth position with respect to the work with respect to the work mounting table, and is inserted into the guide slot. And a vertical moving mechanism for moving and fixing the holder shaft to a set cutting depth position and fixing the cutting shaft. The cutting machine according to claim 1, wherein the cutting angle is freely adjustable.