JPH0732301A - Jig for handsaw - Google Patents

Abstract

PURPOSE:To provide a jig for a handsaw which is easy to handle and can saw straight and flat. CONSTITUTION:A jig for a handsaw can saw vertically a wood including a trunk 1 and branches 2 into halves with branches 2, and a channel 3 is cut on the sawn face of the trunk 1. The sawn face with the channel is placed on a material to be sawn, and a mark put on the material is registered with the channel 3, and the material is pressed by a branch section 2, while a saw blade of a plate-shaped single edged handsaw is fitted into the channel 3 and reciprocating movement is carried out to saw the material straight and flat.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a saw jig for cutting a material with high precision.

[0002]

2. Description of the Related Art Conventionally, in order to accurately cut out a material with a hand-saw, draw a mark such as a line on the material with a pencil and make sure that the saw teeth follow this mark and do not shake the saw blade from side to side. While it is necessary to reciprocate the saw, skill is required. When the saw blade swings to the left and right, the cut surface becomes uneven, especially when joining the cutting surfaces like the corners of the forehead shown in Fig. 4, these unevenness creates a gap at the joint and the adhesiveness It produces defects and poor appearance.

Generally, in the processing of a portion where such accuracy is required, since there is little swing of the saw blade and there is a guide mechanism such as a backing plate for feeding the material, a circular saw or band saw capable of cutting flatly should be used. , It is common practice to roughly cut with a hand-saw and plan the cutting surface.

However, each of the above methods has the following problems.

Circular saws and band saws require a dedicated device having a power source such as a motor.

In the case of a hand-saw, finishing tools and work such as a planer and a file are required.

[0007]

SUMMARY OF THE INVENTION An object of the present invention is to provide a saw jig for cutting a material with high precision by using a handy plate-shaped manual saw.

[0008]

In order to achieve the above object, the present invention relates to a material such as wood or plastic, a plate-shaped manual saw and a jig for a saw, wherein the saw jig is a saw of the manual saw. It is characterized in that it has a groove on both sides of which the body can reciprocate and which is parallel and serves as a guide for the saw blade, and a protrusion protruding to the side of the groove for holding the material.

Further, the groove may be provided with a mechanism for adjusting the interval between the grooves.

Further, the protrusion may be provided with a mechanism for holding it at an arbitrary angle.

In addition, the protrusion may be provided with a clamp mechanism for holding the material.

[0012]

The present invention has a structure in which the deflection of the saw blade is suppressed by the guide groove. Since the saw blade reciprocates in the guide groove, the saw blade does not swing to the left and right, and can be cut straight and flat. Both sides of the groove are wide according to the saw blade, and by making the groove narrow, these effects are further enhanced.

Moreover, technical skill is not required.

The mechanism of this jig is simple and does not require a special constituent material so that anyone can manufacture it.

By attaching a mechanism for adjusting the interval between the grooves, it is possible to handle saws having different saw blade thicknesses.

By attaching a mechanism for pressing the protrusion at an arbitrary angle, it is possible to cut at an arbitrary angle.

By attaching the clamp mechanism for holding the material to the protrusion, the material and the jig are prevented from being displaced from each other.

[0018]

Embodiments of the present invention will now be described with reference to the drawings and tables.

(First Embodiment) FIG. 1 is a perspective view of a jig for a manual saw according to a first embodiment of the present invention.

As shown in FIG. 1, the jig for a hand saw according to this embodiment has a trunk 1 having a thickness of 20 cm and a length of 15 cm and a thickness of 5 cm.
cm, length 15 cm, wood with branch 2 is cut in half lengthwise including branch 2, and the cutting surface of trunk 1 is lengthwise 1 with a circular saw.
A groove 3 having a size of 5 cm, a width of 2 mm and a depth of 7 cm was cut. Place this on the material to be cut, align the marks made on the material with the groove 3 in advance, press the material at the branch 2 part, and press the material into the groove 3 with a plate-shaped single-toothed saw with a tooth spread of 30 cm and a saw width of 6 cm. The saw blade is inserted and reciprocated to cut the material straight and flat.

In addition to wood, metal, plastic, ceramics, pottery, porcelain or the like can be used as the material for the jig.

The trunk 1 and the branch 2 do not have to be integrated from the beginning, and in that case, they may be joined and integrated. When there is no branch 2 and only the trunk 1 is present, a part of the trunk 1 may be cut out to make a branch 2.

The dimensions of the trunk 1, the branches 2, and the grooves 3 may be determined according to the size of the saw and the cutting accuracy.

The surface of the jig contacting the cutting material does not have to be flat, and may be dented or separated depending on the shape of the material.

Table 1 shows the angle between the pressing surface and the cutting surface and the flatness of the cutting surface when a square bar having a length and width of 9 cm is cut.
It is an experimental result comparing the case of cutting with the jig and the saw described above and the case of cutting with the saw alone without using the jig.

The angle between the pressing surface and the cutting surface was set to 90 degrees by forming the jig groove and the pressing surface at right angles. The flatness of the cutting surface was measured by measuring the gap formed by applying a flat surface to the cutting surface.

[0027]

[Table 1] As can be seen from Table 1, when a jig is used as in this example, the variation between the angle formed by the pressing surface and the cutting surface and the flatness of the cutting surface is ± 0 mm and ± 0.1 mm, respectively. On the other hand, when cutting was performed only with a saw without using a jig, variations in the angle between the pressing surface and the cutting surface and the flatness of the cutting surface were ± 2 degrees and ± 0.8 mm, respectively.

As described above, in this embodiment, the saw blade is inserted into the groove and the groove is fixed to the material, so that the saw blade does not swing to the left and right, and the saw blade can be cut straight and flat.

Both sides of the groove are wide according to the saw blade, and the effect is further enhanced by narrowing the groove.

Moreover, no technical skill is required.

The jig has a simple mechanism and does not require any special constituent material, so that it can be manufactured by anyone.

(Second Embodiment) FIG. 2 is a perspective view of a jig for a manual saw according to a second embodiment of the present invention.

As shown in FIG. 2, in the jig for a hand saw according to this embodiment, an adjusting plate 4a is sandwiched between a plate 1a and a plate 2a to form a groove 3a having a parallel gap, and a clamp 6a is attached to the plate 2a. It is made of acrylic and is made by joining the protractor 5a.

FIG. 3 is a diagram showing the use of a jig for a hand saw according to the second embodiment of the present invention.

As shown in FIG. 3, in the jig for the manual saw according to this embodiment, the angle at which the material 7a is cut is determined by the protractor 5a, fixed by the clamp 6a, and the manual saw 8a is put in the groove 3a to reciprocate. To use.

As described above, in the present embodiment, since the groove is provided with the mechanism for adjusting the interval between the grooves, it is possible to cope with saws having different saw blade thicknesses.

Further, since the protrusion is provided with a mechanism for pressing at an arbitrary angle, it is possible to cut at an arbitrary angle.

Further, since the protrusion is provided with the clamp mechanism for holding the material, the material and the jig are prevented from being displaced from each other.

[0039]

As described above, the present invention has the following effects.

According to the first aspect of the present invention, the saw blade of the hand-operated saw is capable of reciprocating, and has grooves on both sides which are parallel to each other and serve as guides for the saw blade, and projections protruding to the sides of the groove for pressing the material. By having it, you can cut straight and flat with a hand-held saw.

High processing accuracy can be obtained without technical skill using a saw.

The jig mechanism is simple and can be manufactured by anyone.

No special material is required for the constituent material.

The invention described in claim 2 is, in addition to the above effects,
It can also be used with saws of different thickness.

According to the invention described in claim 3, in addition to the above effects,
It can be cut at any angle.

According to the invention of claim 4, in addition to the above effects,
The material and jig can be fixed.

[Brief description of drawings]

FIG. 1 is a perspective view of a jig for a manual saw according to a first embodiment of the present invention.

FIG. 2 is a perspective view of a jig for a manual saw according to a second embodiment of the present invention.

FIG. 3 is a view showing the use of a jig for a manual saw according to a second embodiment of the present invention.

FIG. 4 is a perspective view of a corner portion of a forehead for explaining a conventional technique.

[Explanation of symbols]

 1 Stem 1a Plate 2 Branch 2a Plate 3,3a Groove 4a Adjusting Plate 5a Protractor 6a Clamp 7a Material 8a Hand Saw

Claims (4)

[Claims] 1. A jig for a hand-operated saw, comprising a groove as a guide having parallel surfaces on which the saw blade can reciprocate, and a protrusion protruding to the side of the groove for pressing a cutting material. 2. The jig for a manual saw according to claim 1, wherein a groove interval adjuster is attached to the groove. 3. The jig for a manual saw according to claim 1, wherein a protractor is attached to the protrusion. 4. The clamp is attached to the protrusion.
The jig for the manual saw described in.