JPS63172602A - Handsaw for crosscut - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a horizontally movable hand saw, and particularly relates to an improvement in the tooth structure of a horizontally movable hand saw.

[Prior Art] Saws used for wood processing, lumbering, etc. are equipped with appropriate teeth depending on the purpose. This is because the structure of the wood that the saw is trying to cut is not uniform, and a saw that pulls in a direction parallel to the grain (fibers) of the wood has vertical teeth, and a saw that pulls in a direction perpendicular to or across the grain of the wood. A pulling saw is equipped with horizontal pulling teeth.

The present invention is directed to improving a hand saw having horizontal cutting teeth among the various types of saws mentioned above.

By the way, from a functional point of view, saw blades are used to cut wood fibers into chips or sawdust.
It has two functions: one is to discharge the formed chips to the outside of the cutting line (or ``drawing path''). The best sawtooth requires each part of the sawtooth to be properly adjusted to perform both of these functions.

As part of this adjustment, the saw blade usually has a certain amount of recess.

As shown in Fig. 8, the condition in which the setting is applied is a condition in which the tip of the saw tI11 is not distributed alternately to the left and right sides, and by doing so, the saw tooth 1 (with the setting applied to the left side) a) and sawtooth 1 with a clam on the right side (b)
In other words, the width of the cutting line 2 created by saw if (a) and 1 (b) is wider than the thickness T of the saw blade 3, and the tension between the saw blade 3 and the wood 4 during cutting is increased. Scratching can be prevented and the reciprocating motion of the saw body 3 can be made smooth.

This clam is usually 1.3 to 1.8 of the thickness of sawfish 3.
It is said that twice the size is appropriate, and an appropriate cut is made depending on the type of wood to be cut.

In this way, clams are indispensable for saws, but on the other hand, they have the following drawbacks. it is,
As shown in Figure 8, saw teeth 1 (
Since a gap is created between a) and 1(b), a chevron-shaped protrusion 5 is created at the center of the bottom surface of the cutting strip 2 when the wood 4 is cut. In conventional hand saws, this protrusion 5
was scraped off by the inner surfaces of the saw teeth 1(a) and 1(b), so there was a drawback that the cutting resistance of the saw teeth 1 was large.

In order to eliminate such drawbacks, in the conventional horizontal hand saw, as shown in FIG. There was one that was provided with vertical pulling teeth 6. A cross-sectional view of the saw blade 3 of the horizontal saw having the vertical cutting teeth 6 is shown in FIG. 10 (Conventional Example No. 1).

In addition, as another example of the conventional improved horizontal pulling saw,
- There was a thing described in No. 95495 (Conventional example 2)
The horizontal cutting saw disclosed in this publication is also provided with specially shaped teeth for cutting out the protrusions 5 at every predetermined number of stitches.

[Problems to be Solved by the Invention] In the case of Conventional Example No. 1, when cutting wood, the protruding strip 5 (see FIG. 8) at the center of the bottom surface of the cutting strip 2 is cut by the longitudinal teeth 6. Be cut. However, if the horizontal cutting saw has vertical cutting teeth 6, the vertical cutting teeth 6 will cut the wood 4.
There was a problem in that the saw got caught in the grain of the wood and the cutting resistance increased, making it difficult to use as a practical saw.

In addition, in the case of conventional example 2, it is difficult to mechanically make saw teeth of a special shape arranged at a predetermined number of stitches like other horizontal cutting teeth, and they must be made one by one by hand. Therefore, there were problems in that manufacturing was time-consuming and it was difficult to manufacture the entire saw blade.

The present invention has been made to solve these problems, and provides a horizontal hand saw with low cutting resistance, good cutting quality, and easy machining of the saw teeth during manufacturing. The purpose is to

[Means for Solving the Problems] The present invention includes a plurality of teeth arranged in a straight line on the belly of the saw body, and each tooth has a surface formed in the sawing direction. a blade, a back blade formed on the saw feed direction side,
The blade includes a large blade formed at the tip, and the tip formed by the front blade and the large blade is composed of horizontal teeth forming the top of the tooth. The horizontal hikiki teeth other than the horizontal hikiki teeth that are scattered by numbers have a certain level of clearance,
This is a horizontal hand saw that is characterized by having a smaller set-up or no set-up compared to a horizontal-cutting tooth with a certain set set.

[Function] Horizontal pulling teeth with a certain setback mainly perform the sawing function, and horizontal cutting teeth with smaller sets scattered at every predetermined number of cuts or horizontal cutting teeth with no setback cut the cutting line. Functions to cut the center part of the bottom and remove chips.

Both the lateral hikitogi with a certain number of burrs and the yokohikitogi with small or no burls scattered at a predetermined number of stitches are used to cut the grain with their tops. , low resistance to sawtooth cutting,
Allows for light and efficient cutting work.

[Embodiments] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 3 shows a horizontal hand saw 10 according to an embodiment of the present invention.
FIG. As shown in Figure 3, horizontal hand saw 1
0 is the saw body 11 and the handle 1 attached to the saw body 11
2, and a plurality of horizontal pulling teeth 14 are linearly arranged on the belly 13 of the saw body 11.

FIG. 1 is an enlarged view of the teeth of the horizontal hand saw lO shown in FIG. 3, and FIG. 2 is a cross-sectional view taken along the line -n in FIG. Explaining with reference to FIGS. 1 and 2, among the plurality of horizontal pulling teeth 14 arranged in rows, horizontal pulling teeth 143 are scattered every predetermined number of stitches, in this embodiment every five stitches. , and other horizontal pulling teeth 14M are distinguished in setting.

More specifically, as shown in FIG. 2, each horizontal pulling tooth 14M has a certain set of recesses on the left and right sides alternately, while the horizontal recesses are interspersed every fifth row. The pull tooth 143 is not provided with a tab. Moreover, both the m14M with a certain setting and the teeth 148 without setting are composed of horizontally drawn teeth having exactly the same shape. This is a feature of this embodiment.

Here, the basic structure of the horizontal pulling tooth 14 will be explained with reference to FIG. The horizontal pulling teeth 14 include a front blade 16 formed in the sawing direction shown by an arrow 15, a back blade 18 formed in the sawing direction shown by an arrow 17, and a tip of the tooth 14. The tip 20 is made by the front blade 16 and the manual blade 19.
is forming the heaven of teeth. As shown in the figure, the top 20 has a sharp convex point and is shaped to be effective for cutting the grain of wood.

Further, the front blade 16 is configured to have an acute angle surface with respect to the sawing direction 15 in order to improve the cutting ability during sawing and reduce cutting resistance. Similarly, the back blade 18 has an acute angle surface with respect to the saw feeding direction 17 so as to reduce resistance during saw feeding.

The horizontal pulling teeth 14 having such a shape are arranged in rows with their left and right directions alternately reversed. Usually, when viewed from the side, the front blade 16, the back blade 18, and the manual force 19 are visible.
14 (a) is set on the opposite side of the paper, and invisible horizontal pulling teeth 14 (b) such as front blades are set on the front side of the paper.

In order to clarify the difference from the horizontal cutting teeth 14 described above, a brief description of the vertical cutting teeth will be given. As shown in FIG. 5, the vertical cutting f! &21 has a lower blade 22 whose surface is perpendicular to the sawing direction 15. The lower blade 22, which is perpendicular to the sawing direction 15, is effective in cutting soft fiber layers and removing chips during horizontal cutting work in which wood is cut in a direction parallel to the grain. On the other hand, when attempting to use it for vertical cutting to cut wood grains, it is difficult to cut hard wood grains with the lower blade 22 whose surface is perpendicular to the sawing direction 15.

The functions and effects of the horizontal hand saw according to one embodiment of the present invention will be explained with reference to FIG. 6. FIG. 6 is an illustrative wIwR surface view depicting a state in which a timber 24 is horizontally cut with the teeth of a horizontal hand saw according to an embodiment of the present invention. As shown in FIG. 6, when cutting the wood 24, each horizontal f&14M top 20 with a certain level
As a result, a kerf 25 having a width W is formed, and at the same time, the center portion of the bottom surface of the kerf 25 is cut off by the top 20 of each horizontal pulling tooth 14S, which is not provided with a recess. Therefore, as shown in the figure, the wood 24 is cut by four tops 20 lined up in the left and right direction when viewed from the front side of the saw body 11, and a cut is made in the horizontal cutting tooth. Unlike traditional saws that have vertical incisors that do not cut
All of the cuts No. 4 are made by the sharp tops 20 of the horizontal drawers 114M and 148, so there is little cutting resistance during sawing.

In other words, both ends of the cutting @ (cutting line 25) W are cut off by the tops 20 of the horizontal pulling teeth 14M, which are set alternately on the left and right sides,
At the same time, the protruding strip portion 5 (see Fig. 8) that should remain in the center is located at the top 2 of each horizontal pulling tooth 14S that is not set.
It is excised at 0. Therefore, when looking at the cross section, as shown in FIG. 6, the wood 24 is cut by each person 20 lined up in four rows of horizontal pulling teeth 14M and 14S, and a cutting strip 25 is formed. The horizontal hand saw of this embodiment can be used as a saw that cuts easily and easily when pulled perpendicularly to the wood grain or in a direction crossing the grain.

FIG. 7 is a schematic cross-sectional view showing the configuration of teeth of a horizontal hand saw according to another embodiment of the present invention.

As shown in FIG. 7, the horizontal pulling teeth 148 scattered at a predetermined number of stitches may be slightly raised instead of not being raised at all as shown in FIG. 3.

The "small" setting here means a small setting compared to the setting of the other horizontal pulling teeth 14M.

Incidentally, the setting of the horizontal cutting tooth 14M, which performs a constant setting, is performed at 1.0 mm of the thickness of the saw body 11, as in the conventionally known horizontal cutting saw.
Within the range of 3 to 1.8 times, it is appropriate depending on the purpose of the saw, for example, whether it is intended for cutting dry wood or hard wood, or for cutting wet wood or soft wood. Na clams are selected.

In the horizontal pulling hand saw 10 according to the embodiment described with reference to FIG. It may be provided every arbitrary number of stitches, such as every 6th stitch or every 6th stitch.

In addition, horizontal pulling teeth 14S with little set up as shown in Fig. 7 are also available.
Even when the numbers are scattered at every predetermined number of stitches, any number of stitches may be selected as the predetermined number of stitches.

[Effects of the Invention] As described above, the present invention provides a horizontal pulling hand saw in which all the teeth are made up of horizontal cutting teeth having exactly the same configuration, and each horizontal pulling tooth has a predetermined number of stitches. The horizontal pulling teeth other than the horizontal pulling teeth that are scattered have a certain setness, and the horizontal pulling teeth that are scattered at every predetermined number of stitches have a smaller setback compared to the horizontal pulling teeth that have a constant setting. Or, since there are no burrs attached, when sawing wood horizontally or diagonally, the grain of the wood to be cut is aligned with the four rows of horizontal cutting teeth when viewed from the front side in the direction of sawing. Because it is cut by each person,
It is possible to use a horizontal hand saw that can easily cut and saw, and can also cut well.

In addition, the plurality of teeth arranged in a row on the belly of the saw body may all be horizontally drawn teeth of the same configuration, making it possible to create a horizontally drawn hand saw that is compatible with tooth formation by mechanical processing and can be manufactured at low cost. There is a disturbing effect such as.

[Brief explanation of the drawing]

FIG. 1 is a partially enlarged side view of the teeth of a horizontal hand saw according to an embodiment of the present invention. FIG. 2 is a cross-sectional view taken along the line ■--■ in FIG. FIG. 3 shows a horizontal hand saw 10 according to an embodiment of the present invention.
FIG. FIG. 4 is an enlarged side view showing the configuration of the horizontal pulling teeth. FIG. 5 is a perspective view showing the structure of the vertical incisors. FIG. 6 is an illustrative view showing how wood is cut by a horizontal hand saw according to an embodiment of the present invention. FIG. 7 is a cross-sectional view showing the configuration of the teeth of a horizontal hand saw according to another embodiment of the present invention. FIG. 8 is an illustrative view showing how wood is cut using a conventional horizontal saw. FIG. 9 is a partial side view of the teeth of a conventional improved horizontal saw. FIG. 10 is a cross-sectional view taken along line XX in FIG. 9. In the figure, 10 is a horizontal hand saw, 11 is a saw blade, and 14
．． 14M, 14S are horizontal pulling teeth, 16 is front blade, 18 is back blade,
19 represents the sword (upper eye), and 20 represents the heaven of the teeth.

Claims (1)

[Claims] (1) A horizontal hand saw including a saw blade, wherein the saw blade has a plurality of teeth arranged in a straight line on its belly, and all the teeth are arranged in a sawing direction. It includes a front blade formed on the side, a back blade formed on the saw feeding direction side, and a top blade formed at the tip, and the tip formed by the front blade and top blade is the top of the tooth. It is composed of horizontal pulling teeth that form a horizontal pulling tooth, and among the horizontal pulling teeth, the horizontal pulling teeth other than the horizontal pulling teeth that are scattered at every predetermined number of stitches are provided with a certain setback, Among the horizontal pulling teeth, the horizontal pulling teeth dotted at every predetermined number of stitches are characterized in that the setting is smaller than that of the horizontal pulling teeth with a certain setting, or that no setting is provided. A horizontal hand saw.