JPH10202418A - Full thread screw cutter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To cut off a full thread bolt by holding it straight regardless of a thread system by providing a holding part to prevent inclination of the full thread bolt to the side of a cutting means and by making a position of this holding part variable in accordance with a diameter of the full thread bolt. SOLUTION: A position of a holding piece 23 as a holding part A is adjusted by sliding a slide plate 22 by loosening a fixed bolt 26, and the position of the holding piece 23 is fixed by fixing the slide plate 22 by fastening the fixed bolt 26. A full thread bolt 3 is cut off by a fixed edge and a movable edge in a state of holding the full thread bolt 3 straight on the holding piece 23 by putting the full thread bolt 3 by the holding piece 23 positioned at a position adjusted to a diameter of the full thread bolt 3 by adjusting the position of the holding piece 23 as the holding part A in accordance with an outside diameter of the full thread bolt 3 is this way.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a full screw cutting machine for cutting a full screw bolt by shearing by relatively moving two blades, and more particularly to a full screw bolt when cutting a full screw bolt. And a structure for holding

[0002]

2. Description of the Related Art At present, as an example of this kind of full-thread cutting machine, there is one disclosed in, for example, Japanese Patent Laid-Open Publication No. 1-135412. And this kind of full screw cutting machine is used for electrical equipment, air conditioning equipment, ceiling finishing work, etc. As a characteristic, it can cut without crushing the screw thread near the cut surface, so there is no post-processing (file finishing) Can be used to insert a lock nut, making construction easier. There are several types of full-screw bolts according to the application, and all-screw cutters are used according to the material (mild steel, brass, stainless steel) and the outer diameter (screw diameter). In particular, all screw bolts having different outer diameters of the screws (usually M6 to M12) are supported by a dedicated blade a (shown in FIG. 6) adapted to each screw diameter so as not to crush the thread. In order to cut all the screw bolts different from each other, the blade a is exchanged. In other words, the dedicated blade a is provided with a female thread portion b corresponding to a half circumference of the male screw of the full screw bolt, so that the pair of dedicated blades a can be relatively moved and cut by shearing. In FIG. 6, c is a screw hole for attaching the main body. A plurality of special blades a having female screw portions b having different screw diameters d are prepared in accordance with the outer diameter of the full screw bolts, and the exclusive blade a is replaced every time the diameter of the full screw bolt changes. I have. If cutting is performed with a blade that does not match the screw diameter, not only the screw thread is crushed, but also the possibility of damaging the blade increases. For this reason, dedicated blades are prepared for all screw bolts (diameters) that are frequently used.

[0003] By the way, as shown in Fig. 7, the cutting method of the full-screw cutting machine mainly uses pinch cutting, in which two blades are relatively rotated and cut. The so-called material is cut by "shearing". That is, as shown in FIG. 7A, the movable blade 2 is moved as shown by the arrow with respect to the fixed blade 1, and the full screw bolt 3 is cut.
In such a method of cutting by the two blades passing each other, the pressing force (usually 1 to 3 ton) at the time of cutting causes the unfixed full screw bolt 3 to escape in the pressing direction, so that it becomes easy to make diagonal cutting. The resistance increases, and the load on the blade and the main body increases. That is, FIG.
As shown in FIG. 7A, when the full screw bolt 3 is inclined at an angle of θ as shown in FIG.
As shown in (b), the diameter of the full screw bolt is d, but it is necessary to cut by the diameter of D, the cutting area increases, the cutting resistance increases, and the load on the blade and the main body is reduced. growing. Further, as shown in FIG. 7B, the blade receives a repulsive force F in the screw axis direction on the blade, so that the load on the blade and the main body increases, and a fixing strength is required to receive the load. In particular, in the case of a battery-type full-screw cutting machine, if the load becomes large as described above, it may cause the battery to be consumed quickly and reduce its basic performance. Therefore) becomes difficult.

[0004] In order to prevent this, there is also provided one provided with a full screw guide 5 as shown in FIG. This is provided with a full screw guide 5 so as to be integrated with the cutting machine main body 6, and when cutting the full screw bolt 3 between the fixed blade 1 and the movable blade 2, the full screw bolt 3 is not tilted. The whole screw guide 5 guides. However, in many cases, the full screw guide 5 is configured so that the full screw bolt 3 having the maximum diameter can be mounted straight, and when cutting the full screw bolt 3 having a small outer diameter, the full screw guide 5 is used.
And a gap cannot be formed between them so that the inclination of the full screw bolt 3 cannot be prevented. That is, FIG.
When the full screw guide 5 can guide the one having the radius R as in the above, if the full screw bolt 3 has a diameter of 2R, the full screw bolt 3 can be supported straight and cut. 9 (b), when the full screw guide 5 can guide the one with a radius R, if the full screw bolt 3 has a diameter of 2r (R> r), It cannot be cut because it is tilted and supports the full screw bolt 3 straight.

[0005]

In the full-screw cutting machine having the above structure, cutting of the full-thread bolt 3 having the maximum diameter (the distance from the full-screw guide 5 is the same) does not cause any problem, but the thread diameter is smaller. As the size becomes smaller, the inclination of the full screw bolt 3 becomes larger, and there is a problem that the cutting loss becomes larger.

SUMMARY OF THE INVENTION The present invention has been made in view of the above description, and is capable of holding all screw bolts irrespective of the screw diameter, has low cutting resistance, and does not impose a large burden on the blade and the main body. It is an object to provide a machine.

[0007]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, a full-thread cutter according to the present invention has a cutting means for cutting a full-thread bolt by shearing by relatively moving two blades. In the screw cutting machine, a holding portion for preventing inclination of the full screw bolt is provided on a side of the cutting means, and a position of the holding portion is made variable according to a diameter of the full screw bolt. . Even if the diameter of the full screw bolt changes, the position of the holding part can be adjusted accordingly to hold the full screw bolt straight and cut, with low cutting resistance, and without cutting the blade and body. can do.

A slide plate is provided slidably with respect to the base portion, and a holding piece provided on the slide plate is used as a holding portion for all screw bolts, and the slide plate is slid to adjust the position of the holding piece. It is also preferable to provide a fixing screw for fixing the fixing member. in this case,
By loosening the fixing screw and sliding the slide plate, the position of the holding piece as the holding part is adjusted, and after the position is adjusted, the holding piece can be fixed and the position of the holding part can be easily adjusted.

It is also preferable that a mark is provided so that the mark can be viewed when adjusting the position of the holding portion.
In this case, it is easy to adjust the position of the holding portion while viewing the mark.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIG. 1, a full-screw cutting machine is constructed. A handle portion 7 serving as a grip is provided at a lower center portion of a cutting machine main body 6, and a lower portion of the handle portion 7 is provided. Has a battery pack 8 detachably mounted. Cutting machine body 6
A reinforcement piece 9 is provided in front of the handle part 7 of the first embodiment, and the provision of the reinforcement piece 9 makes the handle part 7 thinner so that the handle part 7 can be easily gripped. In addition, by reinforcing with the reinforcing piece 9, even if it is unexpectedly dropped, it is not damaged. A motor 29 is provided at a rear portion in the cutting machine main body 6, and a motor 2 is provided in front of the motor 29 as shown in FIG.
A deceleration block 10 for increasing the rotational torque of the cam 9 is provided.
Power is transmitted to one camshaft. The speed reduction block 10 is constituted by a planetary gear mechanism. The drive of the motor is operated by the switch 12.

A fixed arm 13 and a movable arm 14 are provided at a front portion of the cutting machine main body 6. A fixed blade 1 is provided at an upper end of the fixed arm 13, and a movable blade 2 is provided at an upper end of the movable arm 14. It is detachably attached by a fixing bolt 15. The movable arm 14 is rotatably attached to the cutting machine main body 6 with a stepped shaft 16, and swings around the stepped shaft 16. The roller 17 at the lower end of the movable arm 14 is in rolling contact with the outer surface of the cam 11, and the movable arm 14 swings in a certain angle range by rotating the cam 11. Then, the full screw bolt 3 is arranged between the fixed blade 1 and the movable blade 2, and the cam 11 is driven by a motor.
Is driven to swing the movable arm 14, so that the full-screw bolt 3 can be cut between the fixed blade 1 and the movable blade 2 by shearing. At this time, since the movable arm 14 is attached by the stepped shaft 16,
Is positioned at the head of the stepped shaft 16 so that it cannot move in the axial direction, so that the clearance between the movable blade 2 and the fixed blade 1 can be kept constant even when a load is applied in the axial direction during cutting. Has become.

The fixed blade 1 and the movable blade 2 are provided with semicircular notches as required. A female screw corresponding to the male screw of the full screw bolt 3 may be provided in the inner periphery of the semicircular cutout as in Japanese Patent Application Laid-Open No. 1-135412. In this case, when the total screw bolt 3 to be cut is changed, it is necessary to replace the fixed blade 1 or the movable blade 2 according to the change. Further, as shown in Japanese Utility Model Laid-Open Publication No. 6-17819, a female screw is provided on the inner periphery of the semicircular notch of the fixed blade 1, and the movable blade 2 is provided with a semicircular notch. The tip may be sharp. Further, the fixed blade 1 and the movable blade 2 may not be provided with semicircular notches, and may be simply blades with sharp tips.

On the side of the cutting section comprising the fixed blade 1 and the movable blade 2, there is provided a holding section A for a full screw bolt 3 for cutting so as to be integrated with the housing of the cutting machine body 6. The holding section A is configured as shown in FIGS. A pair of guide ribs 20 are integrally provided on a base portion 19 integral with the housing of the cutting machine main body 6 at intervals, and a lid plate 21 is disposed on the pair of guide ribs 20. 21
Are attached to the base 19 with fixing screws 30. A rectangular plate-shaped slide plate 22 is slidably inserted into a gap between the cover plate 21, the guide rib 20, and the base 19,
A holding piece 23 is provided at one end of the slide plate 22 so as to rise vertically upward.
There is. The other end of the slide plate 22 has a retaining piece 24
Of the slide plate 22
Is prevented from falling off. The cover plate 21 is provided with a U-shaped notch 25 for exposing the slide plate 22, and the cover plate 21 is further provided with fixing bolts 26 for fixing the slide plate 22. The fixing bolt 26 can be operated by an attached hexagon wrench 28. Then, the fixing bolt 26 is loosened, and the slide plate 22 is slid to adjust the position of the holding piece 23 as the holding portion A.
By tightening 6, the slide plate 22 can be fixed, and the position of the holding piece 23 can be fixed. In this manner, the position of the holding piece 23 as the holding portion A can be adjusted according to the outer diameter of the full screw bolt 3. 5 (b)
The fixed blade 1 and the movable blade 2 can cut the full screw bolt 3 in a state where the full screw bolt 3 is applied and the holding piece 23 is held straight as shown in FIG.

Marks 27 are provided on the cover plate 21 and the slide plate 22 so that the slide plate 22 can be slid to easily adjust the position of the holding piece 23 as the holding portion A. That is, M6, M8, M10, M12
A size display mark 27a for indicating the size of the screw and the like is provided, and an alignment mark 27b is provided at the edge of the notch 25 of the cover plate 21. By adjusting the size display mark 27a to be aligned with the alignment mark 27b, the position of the holding piece 23 as the holding portion A can be adjusted to a position corresponding to the outer diameter of the full screw bolt 3. When the mark 27 is provided in this manner, the holding piece 2 as the holding portion A
3 can be adjusted easily and accurately.

[0015]

As described above, according to the present invention, a holding portion for preventing the inclination of the full screw bolt is provided on the side of the cutting means, and the position of the holding portion is made variable according to the diameter of the full screw bolt. Even if the diameter of the full screw bolt changes, the position of the holding part can be adjusted accordingly to hold the full screw bolt straight and cut (minimize the inclination of the full screw bolt due to the difference in screw diameter). ),
The cutting resistance is low and it can be cut with a small cutting force, and it can be cut without putting a burden on the blade and main body. In addition, since it is difficult to make diagonal cuts as in the past, "cut back" on the cut surface Is difficult to do,
In addition, since the load on the blade and the main body is hardly applied, the weight of the parts can be reduced, and a highly reliable driving unit can be formed. In particular, in a battery type full screw cutting machine, the effect is high because the capacity of the battery is limited. .

[0016] The invention of claim 2 of the present invention is based on claim 1.
, A slide plate is slidably provided with respect to the base part, the holding piece provided on the slide plate is used as a holding part for all screw bolts, and the slide plate is fixed with the slide plate being slid to adjust the position of the holding piece. Since the fixing screw is provided, the position of the holding piece as the holding part is adjusted by loosening the fixing screw and sliding the slide plate, and after the position is adjusted, it can be fixed, and the position of the holding part can be easily adjusted. Things.

[0017] The invention of claim 3 of the present invention is directed to claim 1
Alternatively, in the second aspect, since the mark which can be visually observed when adjusting the position of the holding portion is provided, it is possible to easily adjust the position of the holding portion while looking at the mark.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a full-thread cutting machine according to the present invention.

2A is a sectional view of FIG. 1, and FIG. 2B is a side view of FIG.

FIG. 3A is a cross-sectional view of a state where a full-thread bolt is cut, and FIG. 3B is a side view of FIG.

FIG. 4 is a side view illustrating a driving mechanism of the movable arm.

FIG. 5A is a perspective view showing a structure of a holding unit according to the embodiment;
(B) is sectional drawing of the state which hold | maintained the full screw bolt in the holding | maintenance part, (c) is a perspective view of (b).

6A and 6B show a conventional blade, in which FIG. 6A is a perspective view and FIG. 6B is a side view.

FIGS. 7A and 7B are cross-sectional views illustrating a problem at the time of cutting in a conventional example.

FIG. 8 is a perspective view showing a conventional full-thread cutting machine.

FIGS. 9A and 9B are cross-sectional views for explaining a problem of the conventional full screw guide.

[Explanation of symbols]

 A Holder 1 Fixed blade 2 Movable blade 3 Full screw bolt 6 Cutting machine body 22 Slide plate 23 Holding piece 26 Fixing bolt 27 Mark

Claims (3)

[Claims] 1. A full-screw cutting machine having cutting means for cutting a full-thread bolt by shearing by relatively moving two blades, wherein the inclination of the full-thread bolt is prevented from being lateral to the cutting means. A full screw cutting machine, wherein a holding portion for the screw is provided and the position of the holding portion is made variable according to the diameter of the full screw bolt. 2. A slide plate is provided slidably with respect to a base portion, a holding piece provided on the slide plate is used as a holding portion for all screw bolts, and the slide plate is slid in a state where the position of the holding piece is adjusted. 2. The full-screw cutting machine according to claim 1, further comprising a fixing screw for fixing the plate. 3. The full-screw cutting machine according to claim 1, further comprising a mark which is visible when adjusting the position of the holding portion.