JP2008188848A - Lumber measuring/cutting tool - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a handsaw jig which cuts a wood board exactly in a prescribed length by needing no ruled line writing. <P>SOLUTION: A measuring/cutting tool is used to cut a flat lumber block in a prescribed length. A dimensional scale is described on the upper surface of a flat lengthy body 2. At one end of the body, the handsaw jig 3 is arranged/fixed so that a cutting position is a zero position on the dimensional scale when a saw plate S is sawed along a saw blade guide plate 32. The body 2 is moved along the end surface of the lumber block to be cut when used. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

The present invention relates to a structure of a wood measuring and cutting tool that does not require scribing when cutting wood to a predetermined length using a hand saw, and that accurate cutting is promised.

  It is a difficult task for beginners to accurately cut a wooden board into a predetermined length using a hand saw. There are several reasons why it is difficult. First of all, it may not be possible to accurately draw ruled lines. Usually, a point corresponding to a predetermined length is marked and a line perpendicular to the longitudinal direction of the timber is drawn using a curved scale, but this operation may not be accurate for beginners.

  Also, even if the ruled line can be drawn accurately, it may not be possible to perform sawing that is faithful to this line. In sawing, the work is started by pulling the saw plate toward you with the saw blade biting into the wood, but if you pull the saw, the saw plate will bounce and the cutting start position will move and it will not be fixed at the specified position, There are cases in which sawing is not possible due to the fact that the saw dust covers the marking lines and causes trouble. Further, even if cutting can be started from the ruled line, the saw plate cannot be maintained vertically, and the cutting surface often becomes oblique in the case of thick wood.

The present inventor previously arranged a jig equipped with a guide plate (saw blade guide plate) at the cutting position in view of the fact that sawing cannot proceed as set out of these problems that are troublesome for beginners. It has been found that if the guide plate is moved back and forth, it is possible to cope with the disturbance of the cutting position due to the saw blade's bounce and the vertical cutting can be reliably performed without requiring skill. Based on this, a jig for hand saw having a structure as shown in Patent Document 1, for example, has been proposed. This means that one side of a metal material having two planes that intersect at right angles is placed on the workpiece wood, and a saw blade guide plate can be attached with a gap in which a saw plate can be inserted in front of the other side. It is composed.
JP 2004-82575 A

However, using this jig still did not eliminate the problem. For example, it is not uncommon for woodworking operations to have a step of cutting out a plurality of parts having the same length. When cutting out chairs, table legs, etc., accurate dimensioning is an essential requirement for eliminating rattling during use. However, this hand sawing jig does not contribute at all to the point of “drawing a ruled line accurately” which is important in that case. Of course, when cutting the same length, it is necessary to draw the ruled lines as many as the number of cuts, but naturally there is a tendency for the size to vary if a beginner is difficult to draw accurately.

  Therefore, the present inventor has developed a cutting tool that guarantees accurate cutting at a predetermined position without drawing a ruled line as a result of diligent research in view of this point, and without requiring proficiency, The feature is a measuring cutting tool used to cut flat wood into a predetermined length, and a scale is written on the upper surface of the long and flat main body, and one end of the main body is A jig stopper is installed for fixing the jig so that the cutting position when the hand saw is sawed with the jig is 0 position on the dimension scale, and on the main body. It has a dimension determining stopper that can be slid and fixed at an appropriate position.

  That is, the present invention is a cutting tool based on the premise that a jig for hand saw is used, and once the cutting length is determined by the sizing stopper provided in the main body, the cutting tool of the present invention is attached to the workpiece. It is possible to accurately cut out without drawing ruled lines.

  Here, the “hand saw jig” is a member that accurately guides the hand saw to a predetermined cutting start position and restricts the movement of the saw blade plate so that cutting according to the setting is suitable. The details of the structure are not limited in the present invention. For example, one side of a metal material having two planes that intersect at right angles is placed on the workpiece wood, and a saw blade guide plate is placed on the front side of the other plane with a gap into which the saw plate can be inserted. A jig configured to be mounted between the saw blade guide plate and the saw blade guide plate is suitable for use as the hand saw jig of the present invention. The method for installing the hand saw jig on the “main body” (described below) is not limited.

  The “main body” of the wood measuring / cutting tool according to the present invention is for fixing and supporting the above-mentioned jig for hand saw, and at the same time, “dimension scale” is described, and the set dimension position is slid on the dimension scale. It is a member having a “sizing stopper” that can be fixed with The description of the dimension scale may be provided by any method such as a method of engraving and describing directly on the main body, a method of sticking a plastic seal or a metal plate on which the scale is printed, and the like. The overall shape of the main body is not particularly limited, but an angle shape (L-shaped cross section) is preferable because it can easily be applied to the end face in the longitudinal direction regardless of the width of the wood to be processed.

The “sizing stopper” is a member having a function capable of being fixed at a cutting dimension position of the workpiece wood while sliding on the main body. Although it is desired that the slider slides without rattling and does not move easily after being fixed once, the sliding mechanism or the mechanism fixed at the cutting dimension position is not particularly limited.
The distance between the dimensioning stopper position fixed on the main body and the front end position of the hand saw jig fixed on the main body is the dimension to be cut. The back of the positioning stopper has a portion that comes into contact with the end surface of the wood, and when the wood measuring / cutting tool of the present invention is placed on the processed wood and this contacted portion is brought into contact with the end surface on the non-cutting side of the processed wood The saw blade position that is automatically set on the hand saw jig is at the set dimension position.

The wood measuring and cutting tool according to the present invention has the following effects.
(1) No marking is required.
(2) Once the cutting dimension is set by the dimension determining stopper, the same dimension can be cut out to a plurality of pieces of wood accurately and easily.
(3) Since the jig for a hand saw that holds the hand saw so as to perform cutting as set from the set cutting position is provided, the cutting end face is not uneven.

  Hereinafter, the present invention will be described in more detail with reference to the drawings.

  FIG. 1 shows an example of a wood measuring and cutting tool 1 according to the present invention (hereinafter referred to as “the present invention cutting tool 1”). The cutting tool 1 of the present embodiment is composed of a main body 2 made of an aluminum angle material cut to an appropriate length, a hand sawing jig 3 and a sizing stopper 4. is there. The hand sawing jig 3 is fixed in a state where it is accurately positioned by two fixing screws 31 and a fixing tool 21 fixed to one end of the main body 2. The dimension determining stopper 4 smoothly slides on the main body 2 and has a function of being able to be fixed at an appropriate position by tightening a thumbscrew 41 provided on the side surface thereof. A dimensional scale 22 is engraved on the upper surface of the main body 2, and the fixing position of the dimensional determination stopper 4 is determined based on the scale 22.

  2A and 2B are examples in which the structure of the sizing stopper 4 in this example is clarified. FIG. 2A is an example in which an L-shaped hole 42 through which the main body 2 is inserted is provided. (B) shows the example which provided the L-shaped notch 45 which penetrates all the upper surface parts of the main body 2, and a part of side part. The screw hole 43 for the thumbscrew 41 reaches the L-shaped hole 42 in the case of FIG. 5A and reaches the L-shaped notch 45 in the case of FIG. Therefore, when the thumbscrew 41 is tightened in a state in which the dimension determining stopper 4 is set on the main body 2, the screw 41 presses the side surface of the main body 2, and the position can be fixed by the frictional resistance generated at that time. The sizing stopper 4 has a contact portion 44 that comes into contact with the end surface of the wood when the cutting tool 1 of the present invention is set on the processed wood. When this contact portion is brought into contact with the end surface of the wood to be machined that is not cut, the saw blade set in the hand saw jig is automatically in the set dimension position. In this example, the material of the dimension determining stopper 4 is aluminum, but it is not limited to this.

  FIG. 3 shows an example of the hand sawing jig 3 in this example. The hand sawing jig 3 in this example has a saw blade guide plate 32 mounted on the front surface of one plane p of a metal material 31 (made of aluminum) having two planes p and q intersecting at right angles. It is. The plane p and the saw blade guide plate 32 are arranged so as to form a gap d into which a saw plate S (shown by a chain line) can be inserted. Therefore, if the saw is moved back and forth with the saw plate S set in the gap d of the hand sawing jig 3, even a beginner can perform cutting as set.

  Lastly, FIGS. 4A and 4B are a front view and a plan view schematically showing a state in which the workpiece wood W is cut with the set dimensions using the cutting tool 1 of the present invention. The cutting tool 1 of the present invention accurately cuts out the designed dimension, and it is preferable to select an accurate rectangular parallelepiped to be processed in order to prevent the dimension from being distorted.

  In the work, first, the dimension determining stopper 4 is slid to the set dimension position, and the thumbscrew 41 is tightened at that position. Since the scale of the dimension scale 22 can be visually observed in the tightened state, accurate cutting is promised.

  Next, the cutting tool 1 of the present invention is placed on the workpiece wood W, and the contact portion 44 of the dimensioning stopper 4 is applied to the end portion of the wood W that is not cut. At this time, since the main body 2 has an L-shaped cross section, if the main body 2 is slid along the inner side surface of the main body 2 along the longitudinal ridge line of the workpiece wood W, it is automatically set to the set dimension position. Become.

Then, the saw plate S is set in the gap d of the hand sawing jig 3, and the cutting operation is started. In the work, since the movable range of the saw plate S is limited by the hand sawing jig 3, it is possible to perform an accurate cutting work, but the cutting tool 1 of the present invention does not slide on the work wood W. In addition, it is preferable to fix both with a clamp C or the like. In addition, in this example, although the thickness of the to-be-processed timber W was larger than the thickness of the cutting tool 1 of this invention so that it may become clear from the figure (a), even if it is thin, it can respond.

It is a perspective view which shows an example of the wood measurement cutting tool which concerns on this invention. (A) and (b) each show the structure of a dimension determination stopper, (a) is a perspective view, (b) is sectional drawing of another example. It is a perspective view which shows the structure of an example of the jig for hand saws. (A) (b) shows roughly the state which is cutting the to-be-processed timber by the setting dimension using the wood measuring cutting tool concerning this invention, (a) is a front view, (b) is a top view. It is.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Wood measuring / cutting tool 2 Main body 21 Fixing tool 22 Dimensional scale 3 Hand sawing jig 31 Fixing screw 32 Saw blade guide plate 4 Sizing stopper 41 Thumb screw 42 L-shaped hole 43 Screwing hole 44 Contact Part 45 L-shaped notch S Saw plate W Wood to be processed C Clamp

Claims (3)

It is a measuring cutting tool used for cutting flat wood into a predetermined length, a scale is written on the upper surface of the long and flat main body, and a jig for a hand saw is attached to one end of the main body. A jig stopper is installed to fix the position so that the cutting position when sawing is 0 on the dimensional scale, and it is slid on the main body and fixed at an appropriate position. A wood measuring and cutting tool characterized by having a dimensionable stopper. The wood measuring and cutting tool according to claim 1, wherein the main body has an L-shaped cross section. The jig for hand saws is such that one plane of a metal material having two planes intersecting at right angles is placed on the workpiece, and a saw blade guide plate is inserted on the front side of the other plane. The wood measuring and cutting tool according to claim 1, wherein the wood measuring and cutting tool is configured to be attached in a state in which a gap to be obtained is formed between the front surface and the saw blade guide plate.

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