JP2013220617A - Saw - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a saw which, when markig-off at a predetermined angle is performed on an object to be cut using an inclined edge of a saw blade, facilitates positioning of the saw blade and the object to be cut and can stably hold the saw blade.SOLUTION: A saw includes a saw blade 10A having a blade portion 11 formed at one edge, and a saw handle 20A as a grip. The saw further includes a back metal 30A that holds a back 12 of the saw blade 10A and connects it to the saw handle 20A, an edge 32 of the back metal 30A on the side of the blade portion 11 being linear. The saw blade 10A has inclined edges 13a, 13b, and 14a inclined with respect to the edge 32 of the back metal 30A at least at parts of side edges 13, 14 connecting with the blade portion 11, and the handle 20A is positioned at the edge 32 of the back metal 30A on a side opposite from the blade portion 11.

Description

  The present invention relates to a saw used for cutting wood, plastic, metal and the like.

  Cutting of wood, plastic, metal, and the like is often performed by cutting these objects to be cut at 45 degrees or perpendicular to the longitudinal direction. In such a case, before cutting, it is possible to make a ruled line on the object to be cut at a predetermined angle using a cutting ruler whose adjacent two sides are 45 degrees, or a scorer whose angle is 90 degrees. It is common.

  Conventionally, in a saw that cuts an object to be cut by hand, among the edges excluding the blade portion, the other edge is inclined at a predetermined angle with respect to one edge, and the one edge It is known that by aligning along the side of the cutting object, the cutting object can be marked at a predetermined angle using the other edge.

  As a saw having such a predetermined angle scoring function, for example, Patent Document 1 discloses a plastering saw in which a part of a saw blade is provided with an edge of approximately 45 degrees from another edge. Yes.

  In addition, in Patent Document 2, a handle plate is connected to the base portion of a saw blade having a dorsal fin formed in a straight line, leaving end edges on the dorsal fin side and the blade edge side. A saw with a ruler is shown which is formed in a 45 ° inclined line with respect to the dorsal line.

  Patent Document 3 shows a saw having a crest side perpendicular to the head and having a mark hole at 45 degrees from one side of the opposite side.

  When such a saw is used, there is an advantage that it is not necessary to carry a ruler for scoring separately from the saw.

JP-A-57-144504 Japanese Utility Model Publication No. 57-199401 Japanese Utility Model Publication No. 49-143093

  However, in the conventional saw as described above, it is necessary to accurately align one edge of the saw on one side of the object to be cut with reference to one side of the object to be cut. Is needed. In addition, after alignment, the saw blade must be pressed against the object to be cut so that the saw does not move, and the saw blade may move while the line is being drawn. Furthermore, since the thickness of the saw pattern is usually larger than the thickness of the saw blade, depending on the size of the object to be cut, the saw pattern becomes obstructive as shown in FIG. There are many cases in which alignment is hindered, and the saw handle gets on the object to be cut and the holding of the saw blade becomes unstable, and there is still room for improvement.

  An object of the present invention is to solve such a conventional problem, and an object of the present invention is to perform scoring at a predetermined angle on an object to be cut using an inclined edge of a saw blade. In this case, the present invention proposes a new saw that can easily align the saw blade and the object to be cut and can stably hold the saw blade after the alignment.

The present invention, in a saw comprising a saw blade having a blade portion at one end edge, and a saw handle to be a handle,
The saw holds the back portion of the saw blade and is connected to the saw handle, and has a back metal that has a straight edge on the blade portion side,
The saw blade is provided with an inclined edge that is inclined with respect to an edge of the back metal on at least a part of a side edge connected to the blade portion,
The saw is characterized in that the saw handle is positioned on the side opposite to the blade portion with respect to an edge of the back metal.

Further, the present invention provides a saw having a saw blade having a blade portion at one end edge and a saw handle to be a handle,
The saw blade has an inclined edge that is inclined with respect to the back portion of the saw blade on at least a part of a side edge connected to the blade portion, and has at least two protrusions protruding in the plate thickness direction of the saw blade. And
The saw handle is positioned on the side opposite to the blade portion with respect to a straight line connecting the edges of the protrusions on the blade portion side.

  The saw handle preferably includes a connecting portion for detachably connecting the back metal or the saw blade, and the connecting portion is provided eccentric to the axis of the saw handle.

  Since the edge of the back of the back metal holding the saw blade is straight, the edge of the back metal is pressed against one side of the object to be cut so that the saw blade and the object to be cut can be positioned easily. Can be combined. In addition, since the saw handle is located on the opposite side of the blade portion with respect to the edge of the linear back metal, the saw handle can run on the cutting object regardless of the size of the cutting object. As a result, the saw blade can be held in a stable state.

  Also, when the saw blade is provided with at least two protrusions protruding in the thickness direction, and the saw handle is positioned on the opposite side of the blade portion with respect to the straight line connecting the edges of the protrusions on the blade portion side, The blade can be easily aligned with the cutting object, and the saw blade can be held stably.

  If the saw handle is provided with a connecting part for detachably connecting the back metal or the saw blade, and this connecting part is provided eccentrically with respect to the axis of the saw handle, the object to be cut when performing the scribing operation While the saw handle is attached at a position where it does not interfere with the object (position where the axis of the saw handle is separated from the blade), this saw handle is placed in the opposite direction (saw handle axis with respect to the blade) when cutting. Since it can be attached at a position where the mind approaches, the cutting operation can be performed more stably.

It is a top view which shows 1st Embodiment of the saw according to this invention. It is a top view of the saw blade which comprises the saw shown in FIG. 1 is a plan view, (b) is a view in the direction of arrow X shown in (a), and (c) is an A shown in (a). It is sectional drawing which follows -A, (d) is sectional drawing which follows BB shown to (a). 1A is a view of the O-ring constituting the saw shown in FIG. 1 as viewed along the axis m of the saw handle shown in FIG. 3A, and FIG. FIG. 1A is a plan view of the back metal constituting the saw shown in FIG. 1, and FIG. It is a top view which shows the state which put and positioned the saw shown in FIG. 1 on a cutting target object. It is a top view which shows the state which attached the saw handle of the saw shown in FIG. 1 in reverse direction. It is a perspective view which shows 2nd Embodiment of the saw according to this invention. It is a top view which shows 3rd Embodiment of the saw according to this invention. It is a figure explaining a saw handle getting in the way when a conventional saw is placed on a cutting object and aligned.

Hereinafter, the present invention will be described more specifically with reference to the drawings.
FIG. 1 is a plan view showing a first embodiment of a saw according to the present invention, FIG. 2 is a plan view of a saw blade constituting the saw shown in FIG. 1, and FIG. (A) is a plan view, (b) is an arrow view along arrow X shown in (a), and (c) is an A-shown in (a). 4A is a cross-sectional view taken along line A, and FIG. 4D is a cross-sectional view taken along line BB shown in FIG. 4A. FIG. 4 is an O-ring constituting the saw shown in FIG. It is the figure seen along the axial center m of the saw pattern shown to (a), (b) is sectional drawing in alignment with CC shown to (a), FIG. 5 shows the saw shown in FIG. (A) is a plan view, (b) is a cross-sectional view along DD shown in (a), and FIG. 6 shows the saw shown in FIG. It is a plan view showing a state of being placed and aligned 7, the saw handle of the saw shown in FIG. 1, showing a state attached to the opposite direction, is a plan view.
In the following description, the front end side is the side where the saw blade is provided with the saw handle as a reference in the direction along the axis m of the saw handle, and the rear end side is the side opposite to this side. is there.

  As shown in FIG. 1, the saw according to the first embodiment has a saw blade 10A for cutting an object to be cut, a saw handle 20A that becomes a handle when grinding by hand, and the saw handle 20A holding the saw blade 10A. And a back metal 30A for reinforcing the saw blade 10A. In addition, the saw handle 20A holds an O-ring 40 that serves as a slip stopper.

  As shown in FIG. 2, the saw blade 10 </ b> A is formed from a thin metal material K, for example, by press working or the like. The saw blade 10 </ b> A has a blade portion 11 at one end edge, and an end edge facing the blade portion 11 is a linear back portion 12. Further, the side edges (the side edge 13 on the front end side and the side edge 14 on the rear end side in the illustrated example) connected to the edge provided with the blade part 11 are inclined end edges that are inclined with respect to the back part 12. Is provided. The term “inclined with respect to the back” includes a case where the angle is perpendicular to the back. In the illustrated example, the side edge 13 on the front end side is provided with inclined end edges 13 a and 13 b on the front end side that are inclined at 45 degrees and 90 degrees with respect to the back part 12, and the back edge 12 is provided on the side edge 14 on the rear end side. In contrast, the inclined end edge 14a on the rear end side that is inclined at an angle of 67.5 degrees is provided to form three inclined end edges, but at least one may be provided. These angles can be changed as appropriate according to the desired angle of the scribe line. Furthermore, a through-hole 15 for attachment is formed on the back portion 12 side.

  The saw pattern 20A is formed of, for example, a metal cylinder, and as shown in FIG. 3, on the lower side thereof, a slit 21 provided eccentrically with respect to the axis m of the saw pattern 20A. It has. Further, on one side across the slit 21, a screw hole 22 (two in the illustrated example) is provided that is eccentric from the axis m, and on the other side, a recess 23 is provided at a position corresponding to the screw hole 22. ing. Further, the saw pattern 20A is provided with groove portions 24 (two in the illustrated example) for holding the O-ring 40 shown in FIGS. 4 (a) and 4 (b).

  As shown in FIG. 5B, the back metal 30A is formed by, for example, bending a thin plate-like metal material into two so as to have an inverted U-shaped cross section, as shown in FIG. 5A. In addition, the inner edge of the bent metal material is a linear inner edge 31. Further, the edge 32 on the opening side along the longitudinal direction is formed in a straight line that is substantially parallel to the inner edge 31. Further, the back metal 30A includes a hole 33 provided corresponding to the through hole 15 of the saw blade 10A (a screw hole is provided on one side of the bent plate and a through hole is provided on the other side), and a screw of the saw handle 20A. And a hole 34 provided corresponding to the hole 22 (through holes are provided in both bent plates). The back metal 30A may be provided so as to overlap the saw blade 10A (so as to protrude in the plate thickness direction from the saw blade 10A). Instead of the folding structure, the flat blade 30A is used as a flat plate. The saw blade 10A may be directly attached to a single plate.

  As shown in FIG. 1, when assembling the saw blade 10A, the saw handle 20A, and the back metal 30A, the saw blade 10A is inserted between the bent back metal plates 30A, and the back portion 12 is applied to the inner edge 31. At the same time, the through hole 15 of the saw blade 10A and the hole 33 of the back metal 30A are aligned and fixed by a screw N (the through hole 15 and the hole 33 serve as a connecting portion between the saw blade 10A and the back metal 30A). Function). Further, the back metal 30A is inserted into the slit 21 of the saw handle 20A, and the screw holes 22 and recesses 23 of the saw handle 20A are aligned with the holes 34 of the back metal 30A and fixed by screws N (screw holes). 22 and the recess 23 and the hole 34 function as a connecting portion between the saw handle 20A and the back metal 30A). Here, as shown in FIG. 1, the saw handle 20 </ b> A is provided so as to be positioned on the opposite side of the blade portion 11 with respect to the end edge 32 of the back metal 30 </ b> A. The phrase “located on the side opposite to the blade portion with respect to the edge of the back metal” means that the outer peripheral surface of the saw blade 20A on the side of the blade 11 is located on the same line as the edge 32 of the back metal 30A. Including cases. When the O-ring 40 is provided, the O-ring 40 is also on the side opposite to the blade part 11 with respect to the edge 32 of the back metal 30A (the outer peripheral surface of the O-ring 40 on the blade part 11 side is the end of the back metal 30A. (Including the case of being located on the same line as the edge 32).

  In order to perform scoring using the saw having the above-described configuration, as shown in FIG. 6, a saw is placed on the upper surface of the cutting object S, and the edge 32 of the back metal 30A is placed on the cutting object S. Press against one side. Thereby, since the end edge 32 can be made to follow the cutting target S, the inclined end edges 13a, 13b, and 14a of the saw blade 10A can be easily aligned with the cutting target S. Further, since the saw handle 20A is provided on the side opposite to the blade portion 11 with respect to the edge 32 of the back metal 30A, it is possible to hold the saw in a stable state without riding on the cutting object S. it can. Since the saw blade 10A can be replaced with another saw blade, it is possible to easily cope with the case where a scribing line having a different inclination angle from the inclined end edges 13a, 13b, 14a is required. Moreover, since a common saw pattern can be used, the cost of the required saw can be suppressed.

  As shown in FIG. 7, the saw handle 20 </ b> A can be attached to the back metal 30 </ b> A in a direction in which the slit 21 opens upward. Since the screw hole 22 which is the connecting portion of the saw handle 20A to the back metal 30A is eccentric with respect to the axis m, the saw handle 20A is brought closer to the blade portion 11 by being attached in the direction shown in FIG. be able to. Accordingly, the saw pattern 20A is attached in the direction shown in FIG. 1 during ruled writing work, while the cutting work can be performed more stably by attaching it in the direction shown in FIG. 7 during cutting work.

  FIG. 8 is a perspective view showing a second embodiment of the saw according to the present invention. In the second embodiment, portions having the same functions as those of the first embodiment are denoted by the same reference numerals and description thereof is omitted.

  The saw blade 10B shown in FIG. 8 is formed so that the back metal 30A is omitted and directly connected to the saw handle 20A, and further protrudes in the plate thickness direction of the saw blade 10B on the back portion 12 side. At least two protrusions 16 are provided. Note that “projecting in the plate thickness direction” does not only mean projecting to the front surface side (the side shown in FIG. 8) of the saw blade 10 </ b> B, but also includes projecting to the back surface side. The protrusion 16 may be formed by half-cutting or cutting the saw blade 10B itself, and fixing other members to the saw blade 10B with screws, rivets, welding, adhesion, or the like. It may be provided as described. Further, a screw or rivet itself may be provided as a protrusion.

  Even when the saw blade 10B is used, the saw handle 20A is opposite to the blade portion 11 with respect to the straight line L connecting the edges 16a on the blade portion 11 side of the protrusion 16 (the blade portion 11 side of the saw handle 20A). The outer peripheral surface is provided so as to be located on the same line). Thereby, similarly to the first embodiment, the inclined end edges 13a, 13b, and 14a of the saw blade 10B can be easily aligned with the cutting object S, and the saw handle 20A is cut. Since it does not ride on the object S, the saw can be held in a stable state.

  FIG. 9 is a plan view showing a third embodiment according to the present invention. Also in the third embodiment, portions that have the same functions as those in the first and second embodiments are denoted by the same reference numerals and description thereof is omitted.

  The saw handle 20B shown in FIG. 9 is curved in plan view, but is inclined with respect to the edge 32 of the back metal 30B by inclining the rear end side of the back metal 30B to the side opposite to the blade portion 11. It is provided so as to be located on the side opposite to the blade part 11. And although illustration is abbreviate | omitted, also in the case of this embodiment, since the saw handle 20B does not ride on a cutting target object, the saw can be held in a stable state.

  According to the present invention, when scoring the cutting object at a predetermined angle using the inclined edge of the saw blade, the positioning of the saw blade and the cutting object can be easily performed, Since the saw blade can be stably held after the alignment, it is possible to provide a saw that can easily and accurately perform the scoring operation.

10A, 10B Saw blade 11 Blade portion 12 Back portion 13, 14 Side edge 13a, 13b, 14a Inclined edge 16 Projection 16a Edge on the blade portion side of projection 20A, 20B Saw pattern 30A, 30B Back metal 32 Edge of back metal L Straight line connecting the edges on the blade side of the projection m Saw axis

Claims (3)

In a saw provided with a saw blade having a blade portion at one end edge and a saw handle as a handle,
The saw holds the back portion of the saw blade and is connected to the saw handle, and has a back metal that has a straight edge on the blade portion side,
The saw blade is provided with an inclined edge that is inclined with respect to an edge of the back metal on at least a part of a side edge connected to the blade portion,
A saw characterized in that the saw handle is positioned on the opposite side of the blade portion with respect to an edge of the back metal. In a saw provided with a saw blade having a blade portion at one end edge and a saw handle as a handle,
The saw blade has an inclined edge that is inclined with respect to the back portion of the saw blade on at least a part of a side edge connected to the blade portion, and has at least two protrusions protruding in the plate thickness direction of the saw blade. And
The saw is characterized in that the saw handle is positioned on the side opposite to the blade portion with respect to a straight line connecting the edges on the blade portion side of the protrusion.   The saw blade has a connecting portion for detachably connecting the back metal or the saw blade, and the connecting portion is provided so as to be eccentric with respect to the axis of the saw handle. The saw described.

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