JPH0628241Y2 - Replaceable saw - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a replaceable saw, and more particularly, to a replaceable saw having an improved saw blade holding structure.

<Prior Art> Various replaceable saws are available for sale, which can replace a saw blade with deteriorated sharpness with a new saw blade to always maintain a good sharpness.

The saw blade holding structure of the conventional replaceable blade saw has, for example, the structure described in Japanese Utility Model Laid-Open No. 61-10803 and Japanese Utility Model Laid-Open No. 61-143801 according to the applicant's prior application. .

<Problems to be solved by the invention> The saw blade holding structure in the conventional spare blade type saw is
The holding metal fittings and the like for holding the saw body were attached to the outside of the saw handle, and the saw body holding portion did not have a clean appearance. In the former case (saw holding structure disclosed in Japanese Utility Model Laid-Open No. 61-10803), the spare blade (saw blade) has a through hole formed at its base, Since the part is inserted into the saw-body holding part and the saw-body is held by screwing the screw into the through hole, the screw must be removed when replacing the saw-body. There was also a drawback that it took time to put on and take off the body.

Therefore, the applicant of the present application has devised a replaceable blade type saw in which the saw body holding member is housed inside the saw handle so that the saw handle can be neatly formed and can be easily attached and detached.

<Means for Solving the Problems> The present invention is a replaceable blade saw including a saw body and a saw handle, wherein the saw body has a first recessed portion at a lower edge of a base portion thereof. A second concave cutout is also formed on the upper edge, and the saw handle can be engaged with the first concave cutout formed on the chisel, and the saw cut around the shaft. Swinging member provided with an engaging pin capable of rotating the shaft upward, a pressing portion exposed on the outer surface of the saw handle, and a locking claw protruding from the swinging member When the saw body is rotated to a predetermined position, the locking claw fits into the second recessed portion formed in the saw body to hold the saw body in place. Further, a stopper member is provided in the vicinity of the pressing portion for prohibiting the pressing portion from being pressed so that the pressing portion is not accidentally pressed. It is a replacement blade type saw characterized by that.

<Operation> When attaching the saw body to the saw handle, the first recessed portion formed on the base portion of the saw handle is hooked on the engaging pin of the saw handle to rotate the saw body upward. . When the saw body rotates to a predetermined position,
A saw handle engaging claw fits into a second recessed portion formed on the upper edge of the saw base. In the state where the locking claw is fitted in the second recessed portion, the base of the saw body is held at two positions, the engaging pin and the locking claw, so that it is stably held at a fixed position. .

Further, since the stopper member is provided in the vicinity of the pressing portion, even if the pressing portion is pressed by mistake, the swinging member does not swing and the saw body does not come off, which is safe.

<Embodiment> An embodiment of the present invention will be described in detail below with reference to the drawings.

FIG. 3 is a side view of a replaceable blade type saw 1 according to an embodiment of the present invention, and FIG. 4 is a plan view thereof.

The replaceable blade saw 1 includes a saw handle 2 and a saw body 3, and the saw body 3 is attachable to and detachable from the saw handle 2.

The saw handle 2 is provided with a grip portion 4 and a saw body holding portion 5 which are gripped by a user. The grip portion 4 is a core material 6
It has a structure in which a rubber outer skin 7 is covered around the. The saw body holding portion 5 is formed integrally with the core material 6 of the grip portion 4. In this embodiment, the saw blade holder 5 and the core 6 are made of aluminum and die cast. More specifically, the saw-tooth holder 5 and the core member 6 are composed of a pair of die-cast one-side members 8a, 8a.
b is fitted together. When the saw blade holding part 5 and the core material 6 are formed by die casting in this way, a mechanism for holding the saw blade inside the saw blade holding part 5 can be housed, as will be described later. Further, the saw-tooth holder 5 can be made durable, and the texture of the entire saw can be improved.

A pressing portion 10 is shown on the upper portion of the saw blade holder 5.
Since the holding mechanism other than the pressing portion 10 is housed inside all the body holding portions 5, the outer shape thereof is extremely simple and beautiful.

Next, the configuration of the saw blade 3 and the internal structure of the saw blade holder 5 will be described.

FIG. 2 is a side view of the saw body 3. In FIG. 2, a part of the saw body 3 is omitted in the longitudinal direction.
The saw body 3 is formed with a relatively large first recess 13 on the lower edge 12 of the base 11. This first recess 13
As will be described later, is a fulcrum (axis) when the saw blade 3 is engaged with an engaging pin having a circular cross section, and includes a semicircular recess.

A relatively small second recess 15 is formed on the upper edge 14 of the base 11. The second recessed portion 15 is a recessed portion relatively smaller than the first recessed portion 13 and, as will be described later, prevents the engaged locking claws from coming off naturally. Is in the shape of.

Two or more second recessed portions 15 may be formed at different positions on the upper edge 14 as indicated by the chain line.

FIG. 1 is a sectional view for explaining the internal structure of the saw blade holder 5. The saw blade holding portion 5 is provided with a gap 16 into which the base portion 11 of the saw blade 3 can be inserted from its front end to its rear end. An engagement pin 17 is provided at a lower portion of the gap 16 so as to project from one of the two side walls forming the gap 16 toward the other opposing side wall. The engaging pin 17 is formed integrally with one of the pair of one-side members 8a, 8b (see FIG. 4) forming the saw blade holding portion 5, and as described above, Body 11 of the body 3
The cross-sectional shape is circular so that the saw body 3 can be rotated by hooking the first recessed portion 13 formed on the. In addition, the engagement pin 17 is not circular in cross-sectional shape,
The arc-shaped portion may be included in a part thereof.

A support shaft 18 is provided diagonally above and rearward of the engagement pin 17. The support shaft 18 is also integrally formed with either one of the pair of one-side members 8a and 8b (see FIG. 4) forming the saw blade holder 5 and is planted on the inner wall thereof. . An engagement member 19 is fitted on the support shaft 18. Specifically, a small hole is formed at a position near the tip of the engaging member 19, and the small hole is rotatably fitted into the support shaft 18. Therefore, the engagement member 19 is swingable around the support shaft 18. The upper portion of the engaging member 19 is the pressing portion 10 described above, and the pressing portion 10 is exposed above the saw blade holding portion 5. At the tip of the engaging member 19,
The engaging claw 20 is provided so as to project downward.
The engaging claw 20 is for engaging with the second recessed portion 15 formed in the base portion 11 of the saw body 3.

The upper end of the coil spring 21 is engaged below the rear end of the engaging member 19, and the lower end of the coil spring 21 is received by the receiving member 22. The receiving member 22 is integrally formed with at least one of the pair of one-sided members 8a and 8b forming the saw-body holding unit 5. Coil spring 2
1 is provided, the rear end of the engagement member 19 is urged so as to be constantly lifted up by the extension force of the coil spring 21. As a result, the engaging member 19 is attached to the support shaft 18
In the figure, a counterclockwise moment is always applied centered on. Further, since the front portion of the engaging member 19 is pivotally supported by the support shaft 18, the locking claw 20 at the tip of the engaging member 19 is rotated by the coil spring 21 according to the principle of leverage.
It is urged downward with relatively large force.

As a member that applies a counterclockwise moment to the engaging member 19, instead of the above-mentioned coil spring 21, a coil spring having an extension force is inserted between the upper end of the engaging member 19 and the upper surface of the inside of the saw blade holder 5. May be. Further, instead of the coil springs described above, other types of springs such as leaf springs and bamboo shoots may be used.

In this embodiment, the width of the gap 16 provided at the tip of the saw blade holder 5 for inserting the root portion 11 of the saw blade 3 is such that the base portion 11 of the saw blade 3 can be inserted. The width of the gap (the width in the direction perpendicular to the paper surface) of the portion where the engaging member 19 and the coil spring 21 are provided is relatively large. Therefore, a step 23 is formed at the boundary of the gap.

Next, an operation when the saw body 3 is attached to the saw body holding portion 5 will be described. In this case, the base 11 of the saw body 3 is obliquely inserted into the gap 16 and the first recess 13 formed on the lower edge 12 of the base 11 is hooked on the engagement pin 17 to form the first recess. The tip of the saw body 3 is rotated upward around the notch 13. The rear end edge of the base portion 11 has a substantially arcuate shape and rotates while contacting the locking claw 20. Then, when the saw body 3 is rotated to a predetermined mounting position, the locking claw 20 automatically engages with the second recessed portion 15. When the locking claw 20 is engaged with the second recessed portion 15, the engaging member 19 is biased by the coil spring 21 in the direction in which the locking claw 20 is directed downward, so that the pressing member 10 is pressed. Unless the engaging member 19 is engaged, the rear end portion of the engaging member 19 does not descend downward, and the locking claw 20 does not move to the second position.
It does not come off from the recess 15. Therefore, there is no concern that the body will fall out.

Further, in this state, part of the upper edge 14 and part of the lower edge 12 of the base portion 11 come into contact with the inner upper edge and the inner lower edge of the saw blade holder 5, so that the saw blade 3 is It has the advantage of being held more stably.

Next, when removing the saw body 3 from the saw body holding portion 5, the pressing portion 10 may be pressed. When the pressing part 10 is pressed,
The tip of the engaging member 19 rises upward, and the locking claw 20 is disengaged from the second pressing portion 15. In this state, the tip of the saw body 3 may be rotated downward.

In addition, a stopper member 24 may be provided in the vicinity of the pressing portion 10 for prohibiting the pressing portion 5 from being pressed so that the pressing portion 10 is not accidentally pressed during use. As shown by the alternate long and short dash line in FIG.
It suffices to form a recess with which a part of the

FIG. 5 is a plan view of a replaceable blade saw 30 according to another embodiment of the present invention, FIG. 6 is a side view thereof, and FIG. 7 is a main part of the replaceable blade saw 30. It is a fragmentary sectional view showing a structure. As shown in FIG. 5, the replaceable blade type saw 30 according to the present invention has a stepped portion 31 in the outer shape of the saw handle 2. More specifically, the grip portion 4 of the saw handle 2 that is gripped by the user has a thickness that allows the user to easily grip the grip portion 4, while the tip of the saw body holding portion 5 is provided. Has a width necessary and sufficient for holding the saw body 3, and is relatively thin, so that the saw body holding portion 5 includes a step portion 31. If you do this,
There is an advantage that the direction of the saw blade 3 can be easily confirmed.

Further, the grip portion 4 is not entirely covered with the rubber outer cover 7, but has a structure in which a non-slip member 32 such as rubber is attached to the side surface thereof.

Further, in this embodiment, the engaging member 19 is the swinging member 3.
3 and a pressing member 34, both of which are pins 35
It is rotatably connected with. The pressing member 34 is arranged behind the rocking member 33 in a direction substantially perpendicular to the rocking member 33, and the upper end thereof projects above the saw-body holding portion 5. The lower part of the swing member 33 at the rear end and the saw-tooth holder 5
The coil spring 21 is inserted between the coil spring 21 and the inner bottom surface of the rocking member 33, and the swinging member 33 is biased by the extension force of the coil spring 21 so that its rear end is lifted. Also, the pressing member 3
4 is provided with a flange 36, and the pressing member 34 is regulated so as not to project too much toward the upper surface of the saw blade holder 5.

The rest of the configuration is the same as that of the above-described embodiment described with reference to FIG. 2 and the like, and the same parts are designated by the same reference numerals,
The description is omitted here.

<Effect of the Invention> As described above, according to the present invention, the first recessed portion formed on the base of the saw body is hooked on the engaging pin to rotate the saw body, so that the saw body has a predetermined shape. Since the locking claw engages with the second recessed portion when the position becomes, the saw body is engaged and held at two points, so the saw handle stably holds the saw body. It can be done and it is very easy to put on and take off the body. In addition, the outer shape of the saw body holding part provided at the tip of the saw handle can be kept very simple,
It can be a saw with high commercial value. Further, since the stopper member is provided in the vicinity of the pressing portion, even if the pressing portion is pressed by mistake, the saw body does not come off and it is safe.

[Brief description of drawings]

FIG. 1 is a partial sectional view of a replaceable blade type saw according to an embodiment of the present invention. FIG. 2 is a side view of a saw blade of a replaceable blade type saw according to an embodiment. FIG. 3 is a side view of a replaceable blade type saw according to an embodiment of the present invention. FIG. 4 is a plan view of a replaceable blade type saw according to an embodiment of the present invention. FIG. 5 is a plan view of a replaceable blade type saw according to another embodiment of the present invention. FIG. 6 is a side view of a disposable blade type saw according to another embodiment of the present invention. FIG. 7 is a partial sectional view of a replaceable blade type saw according to another embodiment of the present invention. In the figure, 1,30 ... saw blade type saw, 2 ... saw handle, 3
...... Sawing body, 5 ...... Sawing body holding unit, 10 ...... Pressing unit, 1
1 ... Base part, 12 ... Lower edge, 13 ... First recessed part, 14
...... Upper edge, 15 ...... Second recess, 17 ...... Engagement pin, 1
9 ... Engaging member, 20 ... Locking claw, 21 ... Coil spring, 33 ... Oscillating member, 23 ... Pressing member.

Claims (1)

[Scope of utility model registration request] 1. A replaceable blade saw comprising a saw body and a saw handle, wherein the saw body has a first recessed portion formed at a lower edge of a base portion thereof and a first recessed portion formed at an upper edge thereof. (2) A recessed portion is formed, and the saw handle can be engaged with the first recessed portion formed on the saw body, and the saw body can be rotated upward about the first recessed portion. A saw body including a swingable rocking member having a pressing portion exposed on the outer surface of a saw handle, and a locking claw protruding from the rocking member. Is rotated to a predetermined position, the locking claw is fitted into the second recessed portion formed in the saw body to hold the saw body in a fixed position. A replaceable blade type, characterized in that a stopper member is provided in the vicinity of the pressing portion to prevent the pressing portion from being pressed so that the pressing portion is not accidentally pressed. .