JPH1076423A - Portable band saw machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily cut a large diametric pipe or the like even in a portable band saw machine, by mounting a rotation support base rotatably supporting a cut material in a holding means to be made vertically movable relating thereto. SOLUTION: In order to fix a cut material W by a chain vise 3 of a band saw machine main unit A, when an adjusting plate is fastened by a handle 4, a bed 1 of the band saw main unit A is overcome by the cut material W and pulled, so as to slide up the bed 1 with a connection part 26 of a rotation support base B serving as a guide, at least to be stopped by bringing a loading base and the cut material W into contact, the cut material W comes to be fixed to the bed 1 so as to prevent rotation. In this condition, a motor is operated to actuate a band saw, the cut material W is cut by lowing a frame and, cutting is stopped in the halfway where the cut material W collides against the frame.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a portable band saw for cutting pipes and the like.

[0002]

2. Description of the Related Art FIG. 8 shows a conventional portable band sawing machine. In the figure, reference numeral 1 denotes a bed, a mounting table 2 for a material W to be cut, a fixing vise 13 for fixing the material W to be cut, and a handle. And a movable vise 4b that is moved by a push rod 4a that moves forward and backward by the operation of Step 4.

[0003] Reference numeral 5 denotes a frame in which a base end portion 5a is rotatably supported on a front end portion 1a of the bed 1 via a support shaft 6.
The frame 5 is provided with an endless band saw 8 driven by a driving mechanism (not shown) by a motor 7 provided on the frame 5 with a saw blade 8a exposed in a predetermined range.

When a portable band saw machine 9 is used as a vertical portable band saw machine, the band saw 8 is provided horizontally at the exposed lower end of the band saw 8 when the frame 5 is vertically rotated and fixed. Is a table on which the material W to be cut is placed when cutting the material W to be cut.

When the portable band saw machine is used as a horizontal portable band saw machine, the frame 5 is turned sideways, and the frame 5 is first set at a predetermined angle (45 degrees with respect to the mounting table 2 for the material W to be cut). The frame fixing rod 1
The zero tip portion 10a is engaged with the first engagement groove 5b and held so as not to fall any further. Then, the material W to be cut is placed on the mounting table 2 of the bed 1, and the material W is sandwiched and fixed between the fixed vice 13 and the movable vise 4, and then the distal end portion 10a of the frame fixing rod 10 is inserted into the first engagement groove. When the frame 5 is pulled out, the frame 5 further falls down as shown in the figure, and the band saw 8 is pressed against the material W to cut the material W to be cut.

Reference numeral 11 denotes a foot plate which is pulled out of the bed 1 when cutting the material W to be cut and which is stepped on with a foot to stably install the portable band sawing machine. Reference numeral 19 denotes the frame 5. When the frame 5 is fixed vertically to be used as a vertical portable band saw, the one handle 19 functions as a leg. 2
A code 0 connects a switch (not shown) and the motor 7.

[0007]

In the above-mentioned conventional portable band sawing machine, since it is portable, its size and weight are reduced so that it is easy to handle, and the material to be cut is a small-diameter pipe or round bar. Since the purpose was to cut, cutting a large-diameter pipe or the like was not considered. Therefore, when the occasional cutting of large-diameter pipes or the like is necessary, a large band saw machine is required, and it cannot be carried anywhere like a portable band saw machine. It was necessary to take the material to be cut to the place of the machine and cut it, which was very troublesome.

Further, in the above-mentioned conventional portable band sawing machine, a guide portion for guiding the band saw 8 is provided at the outlet 5d and the entrance 5e of the band saw 8 from the frame 5.
Since the outlet 5d and the inlet 5e are integrated, the two guide bearings for guiding the band saw 8 are bent to be bent due to wear, and the bearing is replaced. There was a problem in that it required work such as adjustment with a shim in between, and this exchange and adjustment could not be performed on site. As a method for addressing this problem, there has been a method of detecting a bending phenomenon and adjusting the band saw. However, these methods can be attached to a relatively large band sawing machine, and many of them are expensive, so that a portable device can be used. There is a problem that it cannot be used for a band saw machine.

Further, in the above-mentioned conventional portable band sawing machine, when the material to be cut W is a difficult-to-cut material such as copper or aluminum, the cutting dust adheres to the saw blade because the material is soft and sticky. As a result, clogging is caused and debris is deteriorated, resulting in a problem that a cut surface is extremely rough. As a countermeasure, large band saws are equipped with a cutting oil tank to cool the saw blade and improve chip removal.Drip or spray cutting oil to the saw blade, and remove dust at the outlet and entrance of the band saw. Although a brush for dropping was attached, it became large and expensive, and could not be used with a portable band saw.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and enables a portable band saw machine to cut a large-diameter tube material easily and easily, and to prevent a saw blade from being bent. Another object of the present invention is to provide a portable band sawing machine capable of cutting hard-to-cut materials such as copper and aluminum.

[0011]

In order to solve the above problems, the present invention provides a holding means for holding a material to be cut, a band saw for cutting the material to be cut, a driving means for driving the band saw, In a portable band sawing machine having a frame to which a driving unit is attached and a guide unit attached to the frame to guide the band saw, the holding unit includes a rotation support base rotatably supporting the material to be cut. Are slidably attached to the holding means in a vertical direction. Further, the rotation support base includes a roller that rotatably supports the material to be cut, a roller chain that fixes the material to be cut, and an adjustment plate that adjusts the roller chain with a handle. It is characterized by the following. Further, a marking bar for engraving a cutting position on the material to be cut is attached to the rotary support table so as to be rotatable in parallel with the material to be cut.

A holding means for holding the material to be cut;
A portable band sawing machine including a band saw for cutting the material to be cut, a driving unit for driving the band saw, a frame to which the driving unit is attached, and a guide unit attached to the frame for guiding the band saw. The guide means includes a holding means for holding the material to be cut, a band saw for cutting the material to be cut, a driving means for driving the band saw, a frame on which the driving means is mounted, and a frame attached to the frame. Guide means for guiding the band saw,
In the portable band sawing machine having the above, the guide means is provided at an outlet and an entrance of the band saw of the frame, and a twist block to which two guide bearings sandwiching the band saw are attached, and the twist block is connected via a half moon pin. And an angle / position adjusting device including two adjusting bolts attached to the frame. Further, holding means for holding the material to be cut, a band saw for cutting the material to be cut, driving means for driving the band saw, a frame to which the driving means is attached, and guide the band saw attached to the frame. A portable band sawing machine provided with a guide means, wherein the adhesive tape is wound around the material to be cut and cut.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing the entire portable band saw machine of the present invention, FIG. 2 is a perspective view showing a rotary support of the portable band saw machine of FIG. 1, and FIG. 3 is a view of the portable band saw machine of FIG. FIG. 4 is a side view showing a state in which a material to be cut is clamped on a rotary support table.
FIG. 5 is an explanatory view showing a cutting procedure of the portable band sawing machine of FIG. 1;
Is an explanatory view of cutting a large-diameter pipe with the portable band sawing machine of FIG. 1, FIG. 6 is an enlarged cross-sectional view showing a twist block of the portable band sawing machine of FIG. 1, and FIG. It is explanatory drawing which shows the cutting method using. The same parts as those in the conventional example are denoted by the same reference numerals, and detailed description thereof will be omitted.

First, in FIG. 1, the portable band sawing machine of the present invention comprises a band sawing machine main body A and a rotary support B which is slidably mounted on the band sawing machine main body A in a vertical direction.
The band saw machine body A includes a bed 1 serving as a base and a material W to be cut.
Mounting table 2, a chain vise 3 for fixing the material W to be cut, and a handle 4 for adjusting the chain vise 3
And an adjustment plate 15 which moves forward and backward by operating the handle 4.

A frame 5 having a base end 5a rotatably supported via a support shaft 6 is attached to the distal end 1a of the bed 1. The frame 5 has a motor 7 as a driving means.
The band saw 8 is provided so that only a predetermined area for cutting the material W to be cut is exposed, and the outlet 5 of the band saw 8 of the frame 5 is provided.
Guide means for the band saw 8 are provided at d and the inlet 5e.

A connection portion is provided between the bed 1 and the rotation support B, and a connection portion 26 of the rotation support B described later is provided.
A concave portion 1b (see FIG. 2) corresponding to the T-shaped protrusion is formed, and the connecting portion 26 is fitted into the concave portion 1b so as to be slidable in the vertical direction.

As shown in FIG. 2, the rotary support table B has a bed 21 and two rollers 22a, 2a attached to the bed 21 for rotatably supporting the material W to be cut.
2b, a roller chain 23 for clamping the material W to be cut from above, a handle 24 for adjusting the roller chain 23, and an adjustment plate 25 which moves forward and backward by operating the handle 24. doing. The rotary support B has a connecting portion 26 formed to be slidably attached to the band sawing machine main body A, and a scribe bar 27 for marking a cutting position on the material W to be cut.

As shown in FIG. 3, the roller chain 23 for clamping the material W to be cut has rollers 23b attached to both sides of the chain body 23a when clamping the material W to be cut. The roller 23 b comes into contact with the material W to be cut, and one end of the roller chain 23 is attached to the mounting portion 2 of the bed 21.
1a, the other end is attached to the adjustment plate 25,
The clamped state of the material W to be cut is adjusted by operating the handle 24.

A scribe rod 27 for engraving a cutting position on the material W to be cut is formed by loosely fitting a support shaft 27a of the scribe rod 27 to a cylindrical mounting portion 21b formed on the bed 21 so as to be rotatable. The marking portion 27b attached at right angles to the support shaft 27a is pressed against the material W to be cut, and the cutting position is marked.

A connecting portion 26 for connecting the rotary support B to the band saw machine body A is formed in a T-shaped projection on the side of the band saw machine body A of the bed 21, and is connected to the bed 1 of the corresponding band saw machine body A. A concave portion 1b into which the connecting portion 26 fits is formed,
The connecting portion 26 and the concave portion 1b are configured to be freely slidable in the vertical direction.

The operation of cutting the material W to be cut using the portable band sawing machine having the above-described configuration will be described with reference to FIGS. First, as shown in FIG. 4A, the material W to be cut is placed on the rotary support B and clamped by the roller chain 23. In this case, the clamping state is such that the material W to be cut is the roller 22 of the rotary support B and the roller chain 23.
The adjustment plate 25 is tightened with the handle 24 to such an extent that the adjustment plate 25 can be rotated by the roller 23b. In this state, the receiving surface of the bed 21 of the rotary support B for the material W to be cut is higher than the receiving surface of the bed 1 of the band saw machine body A, and the roller 22 serving as the receiving surface of the rotary support B is coated. Although it is in contact with the cutting material W, the mounting table 2 as the receiving surface of the band saw machine main body A is not in contact with the material W to be cut.

Next, as shown in FIG. 4B, in order to fix the material W to be cut with the chain vise 3 of the band saw machine main body A, the adjusting plate 15 is tightened with the handle 4, and the band saw machine main body A is tightened. Is pulled by losing the material W to be cut, the bed 1 slides up using the connecting portion 26 of the rotary support B as a guide, and finally the mounting table 2 and the material W to be cut come into contact and stop. The material W to be cut is fixed to the bed 1 so as not to rotate. In this state, as shown in FIG. 5, the band saw 8 is operated by operating the motor, the frame 5 is lowered, and the material W to be cut is cut by the saw blade 8a. Stop cutting when it hits 5.

Here, once the frame 5 is raised and the chain vise 3 of the band saw main body A is loosened, the material W to be cut becomes rotatable, so that the uncut portion of the material W to be cut is moved to the position of the saw blade 8a. Then, the chain vise 3 is tightened, the material W to be cut is fixed, and cutting is performed again with the saw blade 8a. If an uncut portion remains even in this operation, the chain vise 3 is loosened again, the material W to be cut is rotated, fixed again, and cut. By repeating this operation, a large-diameter pipe or the like can be cut.

Next, a guide means for guiding the band saw 8 will be described with reference to FIG. Band saw 8 of frame 5
A twist block 30 is attached to the outlet 5d and the inlet 5e as a guide means for guiding the band saw 8. The twist block 30 is attached to the frame 5 with two adjusting bolts 32 and 33 via a half-moon pin 31 fitted into a semi-cylindrical concave portion 30c formed in the twist block 30, and the twist block 30 is attached to the frame. 5 can be tilted. Also,
The holes 30a, 30b through which the adjustment bolts 32, 33 pass are formed larger than the diameters of the shafts 32a, 33a of the adjustment bolts 32, 33. Further, two guide bearings 34, 35 sandwiching the saw blade 8 a of the band saw 8 from both sides are attached to the twist block 30 by fixing bolts 36, 37.

The twist block 30 of the frame 5
A scale 38 indicating the moving distance of the twist block 30 in the left-right direction is engraved in the mounting portion of the twist block 30. Around the concave portion 30c where the half moon pin 31 of the twist block 30 is mounted, the twist block 30 is A scale 39 indicating the inclination angle is engraved. This scale 3
8, 39, the movement in the left-right direction and the fine adjustment of the angle can be performed accurately.

This twist block 30 is usually
As shown in FIG. 6 (a), the saw blade 8 a is mounted perpendicularly to the frame 5, but the saw blade 8 a is cut due to wear of the two guide bearings 34 and 35 sandwiching the band saw 8 and deformation of the frame 5. If the material W does not hit vertically, it is necessary to adjust the tilt angle and position of the twist block 30. In this case, for example, as shown in FIG. 6B, the two adjustment bolts 32 and 33 are adjusted, and the adjustment bolt 33 is tightened. Then twist block 30
Can be rotated about the half moon pin 31 and tilted to the left as shown by the arrow to adjust the angle. On the other hand, when tilting to the right, the adjustment bolt 32 may be tightened.

Further, in order to shift the position of the twist block 30 in the left-right direction, the two adjustment bolts 32 and 33 are loosened as shown in FIG.
0 can be shifted in the required direction. This is because the diameter of the shafts 32a, 33a of the adjustment bolts 32, 33 is larger than the diameter of the hole 30.
Since the diameters of a and 30b are increased, the position can be shifted by the clearance of this diameter.

As described above, the twist block 30
The band saw 8 has two guide bearings 34 sandwiching the saw blade 8a,
Since the angle and the position can be adjusted in accordance with the wear of the frame 35 and the deformation of the frame 5, it is possible to prevent the conventional problems such as twisting, bending, and bending of the saw blade 8a. In the above-described embodiment, the semi-cylindrical recess 30c is formed in the twist block 30 and the half-moon pin 31 faces downward. However, the hemispherical recess is formed on the frame 5 side, and the half-moon pin 31 faces upward. The same effect is obtained.

Next, a method of cutting the workpiece W using the band saw 8 will be described with reference to FIG. In this cutting method, first, as shown in FIG. 7A, an adhesive tape 40 such as a gum tape is wound around a cutting position of a material W to be cut, which is a difficult-to-cut material such as copper or aluminum. Next, as shown in FIG. 7B, a difficult-to-cut material such as aluminum is cut from the adhesive tape 40 with a band saw 8. Then, the cutting debris that has adhered to the saw blade 8a of the band saw 8 and caused clogging is adhered to the adhesive tape 40 when the saw blade 8a passes through the adhesive tape 40, or the cutting debris that was not adhered was cut off. Since it is dropped, the cutting debris is removed from the saw blade 8a, and the saw blade 8a can always be cut in a clean state.
Difficult-to-cut materials such as copper and aluminum can be cut.

[0030]

As described above, the present invention provides a holding means for holding a material to be cut, a band saw for cutting the material to be cut, a driving means for driving the band saw, and a guide for guiding the band saw. Means, comprising:
In the holding means, a rotation support base rotatably supporting the material to be cut is attached so as to be vertically movable with respect to the holding means, so that even a large band pipe or the like can be easily used in a portable band sawing machine. It has an excellent effect of being able to be cut. Also, the guide means is provided with a device for adjusting the angle and position of the saw blade of the band saw,
The bending phenomenon of the saw blade can be corrected, and the right-angle accuracy of the saw blade can be secured. In addition, by winding the adhesive tape around the material to be cut and cutting it, copper,
It is now possible to cut difficult-to-cut materials such as aluminum.

[Brief description of the drawings]

FIG. 1 is a perspective view showing the entire portable band saw machine of the present invention.

FIG. 2 is a perspective view showing a rotation support base of the portable band saw machine of FIG. 1;

FIG. 3 is a side view showing a state in which a material to be cut is clamped on a rotating support of the portable band sawing machine of FIG. 1;

FIG. 4 is an explanatory diagram illustrating a cutting procedure of the portable band sawing machine of FIG. 1;

FIG. 5 is an explanatory view of cutting a large-diameter pipe by the portable band saw of FIG. 1;

FIG. 6 is an enlarged sectional view showing a twist block of the portable band sawing machine of FIG. 1;

FIG. 7 is an explanatory view showing a cutting method using an adhesive tape as a material to be cut.

FIG. 8 is a perspective view showing a conventional portable band sawing machine.

[Explanation of symbols]

 A Band saw machine body B Rotation support W Material to be cut 1 Bed 2 Placement table 3 Chain vice 4 Handle 5 Frame 7 Motor 8 Band saw 8a Saw blade 10 Fixed rod 11 Foot plate 15 Adjustment plate 19 Handle 20 Code 21 Bed 22 Roller 23 Roller Chain 24 Handle 25 Adjusting plate 26 Connecting part 27 Marking bar 30 Twist block 31 Half moon pin 32 Adjusting bolt 33 Adjusting bolt 34 Guide bearing 35 Guide bearing 36 Fixing bolt 37 Fixing bolt 38 Scale 39 Scale 40 Adhesive tape

Claims (5)

[Claims] 1. A holding means for holding a material to be cut, a band saw for cutting the material to be cut, a driving means for driving the band saw, a frame to which the driving means is attached, and the band saw attached to the frame. A portable band sawing machine comprising: a rotatable support table for rotatably supporting the material to be cut is attached to the holding means so as to be slidable in the vertical direction with respect to the holding means. A portable band sawing machine characterized by being used. 2. The rotation support base includes a roller that rotatably supports the material to be cut, a roller chain that fixes the material to be cut, and an adjustment plate that adjusts the roller chain with a handle. The portable band saw machine according to claim 1, wherein: 3. The portable device according to claim 1, wherein a marking bar for engraving a cutting position on the material to be cut is rotatably attached to the rotary support base in parallel with the material to be cut. Band saw machine. 4. A holding means for holding a material to be cut, a band saw for cutting the material to be cut, a driving means for driving the band saw, a frame to which the driving means is attached, and the band saw attached to the frame. And a guide means for guiding the band saw, wherein the guide means is provided at an outlet and an entrance of the band saw of the frame, and a twist block attached with two guide bearings sandwiching the band saw, A portable band sawing machine, comprising: an angle / position adjusting device including two adjusting bolts for attaching a twist block to the frame via a half-moon pin. 5. A holding means for holding a material to be cut, a band saw for cutting the material to be cut, a driving means for driving the band saw, a frame to which the driving means is attached, and the band saw attached to the frame. A cutting method for a portable band sawing machine, comprising: a band sawing machine having a guide means for guiding the material to be cut.