JP2003062804A - Replaceable blade type saw - Google Patents

Abstract

PROBLEM TO BE SOLVED: To raise versatility of use and comfortableness of use by adjusting a pivot position of a grip handle part to an applied part by a pivot position adjusting mechanism and adjusting the pivot position of the grip handle part to the applied part according to a sawing work posture such as downward one, oblique upward, horizontal and the like. SOLUTION: A saw plate body 1 having a saw tooth part 1b is freely changeably equipped to a saw handle body 2 by a tooth changing mechanism. The saw handle body is formed by the applied part 3 to which the saw plate body can be installed and the grip handle part 4. A pivotal position adjusting mechanism 5 capable of adjusting a pivotal position of the grip handle part to the applied part is provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a replaceable blade type saw that can replace, for example, a saw blade having a reduced sharpness.

[0002]

2. Description of the Related Art Conventionally, as this type of replaceable saw, there has been known a structure in which a saw plate body having a saw blade portion on a saw handle body is removably mounted by a blade replacing mechanism. .

[0003]

However, in the case of these conventional structures, the relative position of the saw plate body with respect to the saw handle body is constant, and therefore, it is necessary to cope with the sawing work posture such as downward, obliquely upward or horizontal. However, it has the disadvantage that it lacks flexibility of use and comfort of use.

[0004]

SUMMARY OF THE INVENTION An object of the present invention is to solve these problems. Of the present invention, the invention according to claim 1 is a saw plate body having a saw blade portion in a saw blade body. The saw handle body is detachably mounted by a blade replacing mechanism, and the saw handle body is formed by a mount portion on which the saw plate body can be mounted and a grip handle portion, and the grip handle portion is rotated with respect to the mount portion. It is a replaceable blade type saw characterized by being provided with a rotational position adjusting mechanism capable of adjusting a moving position.

Further, in the invention according to claim 2, as the rotation position adjusting mechanism, a forked portion is formed in which a fitting insertion groove portion into which the mounting portion can be fitted is formed in the grip handle portion so as to sandwich the mounting portion. -Shaped opposed pair of branch portions are formed, a fulcrum shaft bolt is inserted into the one branch portion, and a nut portion to which the fulcrum shaft bolt can be screwed is formed in the other branch portion, and the fulcrum shaft is attached to the mounting portion. The present invention is characterized in that a fulcrum hole portion through which a bolt can be inserted is formed, and the invention according to claim 3 interlocks between the facing surfaces of the one branch portion and the mounting portion. The invention according to claim 4 is characterized in that a surface ratchet mechanism composed of ratchet tooth surfaces that can be separated is provided.
As the blade replacement mechanism, an insertion portion is formed in the base portion of the saw plate body, an opening groove portion extending in the insertion direction of the saw plate body is formed in the insertion portion, and the mounting portion is formed in the insertion portion. Is formed by a pair of mounting pieces that are opposed to each other with an insertion gap that allows insertion, and that the insertion part can be sandwiched, and the mounting bolt is inserted into one of the mounting pieces while the other mounting piece is inserted. A mounting nut portion to which a mounting bolt can be screwed is formed, and the invention according to claim 5 forms a positioning hole portion at the closed end of the opening groove portion, The mounting bolt is formed with a positioning taper portion capable of being pressed into contact with the positioning hole portion.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIGS. 1 to 5 show an embodiment of the present invention, in which reference numeral 1 denotes a saw plate body which is made of metal and has a plurality of saw blade portions 1a on both sides thereof. The mountain-shaped saw blade portion 1b is formed, and the insertion portion 1c is formed at the base portion.
An opening groove portion 1d extending in the inserting direction of the saw plate body 1 is formed in
A positioning hole 1e is formed at the closed end of the opening groove 1d.

Reference numeral 2 denotes a saw handle body, which is made of wood or synthetic resin. The saw handle body 2 includes a mounting portion 3 on which the saw plate body 1 can be mounted and a grip handle portion 4 held by an operator. A rotary position adjusting mechanism 5 is provided for adjusting the rotary position of the handle 4 with respect to the mounting portion 3.

In this case, as the rotating position adjusting mechanism 5, the fitting portion 3 can be sandwiched by forming the fitting groove portion 4a into which the base portion of the mounting portion 3 can be fitted at the tip portion of the grip handle portion 4. A pair of opposite bifurcated branch portions 4b, 4b are formed. A fulcrum shaft bolt 4c is inserted into the one branch portion 4b and a nut portion 4d to which the fulcrum shaft bolt 4c can be screwed is attached to the other branch portion 4b. By forming a fulcrum hole portion 3a into which the fulcrum shaft bolt 4c can be inserted in the mounting portion 3, and by providing a surface ratchet mechanism 6 between the facing surfaces of the one branch portion 4b and the mounting portion 3. I am configuring.

In this case, as the surface ratchet mechanism 6, a radial ratchet surface 6a centering on the fulcrum hole portion 3a is formed on the surface of the mounting portion 3 facing the one branch portion 4b, and the grip handle portion 4 is formed. A ratchet piece 6c formed by forming a radial ratchet tooth surface 6b centering on the axis of the fulcrum shaft bolt 4c on the surface of the one branching portion 4b facing the mounting portion 3 so that it can be occluded and disengaged from the radial ratchet tooth surface 6a. It is fixedly arranged, and an insertion hole 6d is formed in the ratchet piece 6c.

In the state where the fulcrum shaft bolt 4c is loosely rotated, the grip handle 4 is angularly rotated with respect to the mounting portion 3 in accordance with the sawing work posture about the axis of the fulcrum shaft bolt 4c. By tightening and rotating the fulcrum shaft bolt 4c at this angular position, the mounting portion 3 is sandwiched by the branch portions 4b, 4b,
The grip handle portion 4 is fixed in position on the mounting portion 3.

Reference numeral 7 denotes a blade replacement mechanism, in which case the mounting portion 3 is fixedly opposed to the insertion portion 1c with an insertion gap H into which the insertion portion 1c can be inserted. Formed by a pair of possible mounting pieces 3b, 3b, one mounting piece 3b
The mounting bolt 7a is inserted into the
The mounting bolt 7a is formed with a mounting nut portion 7b to which the mounting bolt 7a can be screwed, and the mounting bolt 7a is formed with a positioning taper portion 7c which can be pressed against the inner peripheral surface of the positioning hole portion 1e.

With the mounting bolt 7a loosely rotated, the mounting bolt 7a is positioned in the opening groove portion 1d, and the insertion portion 1c of the saw plate portion 1 is inserted into the insertion gap H, so that the mounting bolt 7a The insertion portion 1c is clamped and held by the mounting piece bodies 3c and 3c by rotating and tightening, and the insertion portion 1c of the saw plate portion 1 is inserted while the mounting bolt 7a is loosely rotated. Gap H
Therefore, the saw plate body 1 is configured to be replaceable with respect to the mounting portion 3.

Since this embodiment has the above structure,
The turning position adjusting mechanism 5 allows the turning position of the grip handle 4 to be adjusted with respect to the mounting portion 3, and the grip handle portion 4 is attached according to the sawing work posture such as downward, obliquely upward, or horizontal. By adjusting the rotational position with respect to, the flexibility of use and the comfort of use can be enhanced.

Further, in this case, as the rotation position adjusting mechanism 5, a bifurcated shape in which the fitting portion 3 can be sandwiched by forming a fitting insertion groove portion 4a into which the mounting portion 3 can be fitted and inserted in the grip handle portion 4. Forming a pair of opposing branch portions 4b, 4b, inserting the fulcrum shaft bolt 4c into one of the branch portions 4b, and forming a nut portion 4d into which the fulcrum shaft bolt 4c can be screwed into the other branch portion 4b. Since the fulcrum hole portion 3a through which the fulcrum shaft bolt 4c can be inserted is formed in the portion 3, the structure can be simplified, and
In this case, ratchet tooth surfaces 6a and 6 which can be occluded and separated from each other between the facing surfaces of the one branch portion 4b and the mounting portion 3
Since the ratchet mechanism 6 composed of b is provided, the grip handle portion 4 can be reliably fixed to the rotation position with respect to the mounting portion 3 by the mutual engagement of the ratchet tooth surfaces 6a and 6b. Can be done smoothly.

Further, as the blade replacing mechanism 7, an inserting portion 1c is formed at the base of the saw plate body 1, and an opening groove portion 1d extending in the inserting direction of the saw plate body is formed in the inserting portion 1c, The mounting portion 3 is formed by a pair of mounting piece bodies 3b and 3b which are arranged to face each other with an insertion gap H into which the insertion portion 1c can be inserted and which can sandwich the insertion portion 1c. Since the mounting bolt 7a is inserted through 3b and the mounting nut 7b to which the mounting bolt 7a can be screwed is formed on the other mounting piece 3b, the saw plate body 1 is moved by loosening and tightening the mounting bolt 7a. It can be easily replaced, and in this case, a positioning hole portion 1e is formed at the closed end of the opening groove portion 1d so that the mounting bolt 7a can be pressed against the positioning hole portion 1e.
Since the taper portion 7c and the positioning hole portion 1e are brought into pressure contact with each other as the mounting bolt 7a is screwed, the saw plate body 1 can be positioned with respect to the mounting portion 3 and the saw plate body 1 is formed. Can be securely fixed to the mounting portion 3 without rattling, and the sawing operation can be performed smoothly.

The present invention is not limited to the above-described embodiment, but the structure, form, etc. of the saw plate body 1, the saw handle body 2, the mounting portion 3, the grip handle portion 4, and the turning position adjusting mechanism 5. Are appropriately designed and changed. It can be commonly used in the double-edged saw and the single-edged saw of the above-described embodiment.

[0017]

As described above, according to the present invention, the grip position can be adjusted with respect to the mounting portion by the rotation position adjusting mechanism. By adjusting the rotational position of the grip handle portion with respect to the mounting portion according to the sawing work posture such as upward or horizontal, it is possible to enhance flexibility of use and comfort of use.

Further, in the invention according to claim 2, as the rotation position adjusting mechanism, a fitting insertion groove portion into which the mounting portion can be fitted is formed in the grip handle portion so that the mounting portion can be sandwiched. A pair of bifurcated opposing branch parts are formed, a fulcrum shaft bolt is inserted in one branch part, and a nut part to which the fulcrum shaft bolt can be screwed is formed in the other branch part. Since the fulcrum hole portion through which the insertion portion is inserted can be formed, the structure can be simplified, and in the invention according to claim 3, between the facing surfaces of the one branch portion and the mounting portion. Since it is provided with a ratchet mechanism composed of ratchet tooth surfaces that can be occluded and disengaged from each other, it is possible to securely fix the handle part to the mounting portion by the bite of the ratchet tooth surfaces relative to each other. You can smoothly perform sawing work,
In the invention according to claim 4, as the blade replacement mechanism, an insertion portion is formed at the base of the saw plate body, and an opening groove portion extending in the insertion direction of the saw plate body is formed in the insertion portion. The mounting portion is formed by a pair of mounting pieces that are arranged so as to face each other with an insertion gap into which the insertion portion can be inserted and that can sandwich the insertion portion. The saw plate body can be easily replaced by loosening and tightening rotation of the mounting bolt, since the mounting nut portion which is inserted and the mounting bolt can be screwed into the other mounting piece is formed. In the invention described in 5, a positioning hole is formed at the closed end of the opening groove,
Since the mounting bolt is formed with a positioning taper portion that can be pressed into contact with the positioning hole, the saw plate body is positioned with respect to the mounting portion by the pressure contact between the tapered portion and the positioning hole as the mounting bolt is screwed on. Therefore, the saw plate body can be securely fixed to the mounting portion without rattling, and the sawing operation can be performed smoothly.

As described above, the intended purpose can be sufficiently achieved.

[Brief description of drawings]

FIG. 1 is a front view of an embodiment of the present invention.

FIG. 2 is an exploded perspective view of an embodiment of the present invention.

FIG. 3 is a partial side view of the embodiment of the present invention.

FIG. 4 is a partial plan sectional view of an embodiment of the present invention.

FIG. 5 is a partially enlarged cross-sectional view of an exemplary embodiment of the present invention.

[Explanation of symbols] 1 saw plate 1b saw blade 1c insertion part 1d opening groove 1e Positioning hole 2 sawtooth body 3 mounting parts 4 grip handle 4a Fitting groove part 4d nut part 5 Rotational position adjustment mechanism 6 Ratchet mechanism 6a ratchet surface 6b Ratchet surface 7 Blade replacement mechanism 7a Mounting bolt 7b Mounting nut part 7c Tapered part

Claims (5)

[Claims] 1. A saw blade body having a saw blade portion mounted on a saw blade body by means of a blade exchange mechanism so that the saw blade body is replaceable. The saw blade body has a mounting portion to which the saw blade body can be attached and a grip handle. And a rotary position adjusting mechanism capable of adjusting the rotary position of the grip handle with respect to the mounting part. 2. A pair of bifurcated bifurcated bifurcated portions capable of sandwiching the mounting portion by forming a fitting insertion groove portion into which the mounting portion can be fitted in the grip handle portion as the rotation position adjusting mechanism. A fulcrum shaft bolt is inserted into the one branch portion, and a nut portion to which the fulcrum shaft bolt can be screwed is formed in the other branch portion,
The replacement blade type saw according to claim 1, wherein a fulcrum hole portion through which a fulcrum shaft bolt can be inserted is formed in the mounting portion. 3. A surface ratchet mechanism including ratchet tooth surfaces that can be occluded and separated from each other between the facing surfaces of the one branch portion and the mounting portion.
Spare blade saw as described. 4. As the blade replacement mechanism, an insertion portion is formed in a base portion of the saw plate body, and an opening groove portion extending in the insertion direction of the saw plate body is formed in the insertion portion, and the mounting portion is formed. Is formed by a pair of mounting piece bodies that are opposed to each other with a inserting gap into which the inserting portion can be inserted and that can sandwich the inserting portion, and the mounting bolt is inserted into one of the mounting piece bodies. The replaceable blade type saw according to any one of claims 1 to 3, wherein a mounting nut portion to which a mounting bolt can be screwed is formed on the other mounting piece. 5. A positioning hole portion is formed at a closed end of the opening groove portion, and a positioning taper portion capable of being pressed into contact with the positioning hole portion is formed on the mounting bolt. Spare blade type saw.