JP3001778U - Saw - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a saw that can firmly fix a saw blade. A metal holder having a band-shaped saw blade 1 and a pair of thin-walled flat plate portions 5 in which the base end portion of the saw blade 1 can be freely inserted and removed and abuts or approaches both side surfaces of the base end portion. The body 2 and the handle 3 having the slits 8 each having a one-character cross section and having a bifurcated distal end are provided. The holding body 2 is fitted to the handle portion 3 such that the pair of flat plate portions 5 are along the opposing inner surfaces 10 of the slits 8. A saw blade fixing fastener 4 for tightening a pair of flat plate portions 5 together with the bifurcated front end portion of the handle portion 3 to narrow the mutual distance between the flat plate portions 5 is provided on the slit tip opening side of the handle portion 3.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a saw.

[0002]

[Prior art]

 Conventionally, there is a saw as shown in FIGS. 6 and 7, and the saw has a band plate-shaped saw blade a and a base end portion of the saw blade a that can be freely inserted and removed and both side surfaces of the base end portion can be inserted and removed. A holding member c having a pair of flat plate portions b and b that are in close proximity to each other and a handle portion d to which the holding member c is fixed. The saw blade a was fixed by tightening the tips e of the protruding flat plate portions b, b.

[0003]

[Problems to be solved by the device]

 Therefore, when cutting a plate or the like with a saw, the tip portions e of the flat plate portions b and b protruding excessively from the handle d hit the plate or the like and become an obstacle. Moreover, since the flat plate portions b, b are thin, the saw blade a is apt to wobble.

Also, since there is almost no gap between both side surfaces of the base end of the saw blade a and the flat plate portions b, b, when the saw blade a is inserted between the flat plate portions b, b. However, there is a problem in that it is difficult to position the both side surfaces of the base end of the saw blade a so that they can be brought into contact with or close to the inner surfaces of the flat plate portions b, b that face each other, and they cannot be quickly inserted.

Therefore, the present invention aims to provide a saw that solves the above-mentioned conventional problems.

[0006]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the present invention provides a band-shaped saw blade and a pair of saw blades having a base end portion which can be freely inserted and removed and which abuts or approaches both side surfaces of the base end portion. A metal holding body having a thin flat plate portion and a handle portion having slits with a single letter cross section at a predetermined interval whose tip portion is bifurcated are provided, and the holding body is placed in the handle portion inside the slit. Saw blades that are fitted to each other so that the pair of flat plate portions are in line with each other, and the pair of flat plate portions are tightened together with the bifurcated distal end of the handle portion to narrow the mutual distance between the flat plate portions. The fixing fastener is provided on the slit tip opening side of the handle.

Further, the inner part of the base end of the slit has a circular cross section having a diameter larger than the interval between the slits.

Further, a band plate-shaped saw blade, and a holding body having a pair of flat plate portions in which a base end portion of the saw blade can be freely inserted and removed and abuts or approaches both side surfaces of the base end portion. And a handle portion to which the holding body is fitted, and one of the tip edges of the flat plate portions projecting from the tip surface of the handle portion exposes the inner surface of the other tip edge facing each other. It has a small cutout portion for forming a saw blade insertion opening.

[0009]

[Action]

 The small notch forms an insertion opening that is wider than the gap between the saw blade and both flat plates, so if the base end of the saw blade faces this insertion opening, the exposed flat plate The side surface of the base end portion of the saw blade can be brought into contact with the facing inner surface, and the saw blade can be slid along the facing inner surface as it is to be easily inserted between the flat plate portions. Then, by using the fastener, the distance between the flat plate portions can be narrowed to clamp and fix the saw blade.

Since the fastener is disposed on the slit tip opening side of the handle, the fasteners are tightened so that the mutual distance between the flat plate portions becomes gradually narrower from the base end side to the tip end side. Therefore, the tightening force at the tips of both flat plates is increased, and the saw blade is fixed in a strong and stable state.

At this time, stress is likely to be concentrated in the inner part of the base end of the slit, but since the inner part of the base end has a circular cross section, no crack occurs. Moreover, since the diameter of the inner part of the base end is larger than the gap between the slits, the reaction force against tightening at the forked tip of the handle can be reduced, and the tightening force is further increased.

[0012]

【Example】

 Hereinafter, the present invention will be described in detail with reference to the drawings illustrating an embodiment.

FIG. 1 shows an embodiment of a saw according to the present invention, which comprises a band-shaped saw blade 1 and a metal holder 2 into which the base end of the saw blade 1 can be inserted and removed. And a synthetic resin handle 3 having a V-shaped overall shape, and the handle 3 is provided with a fastener 4 for fixing a saw blade.

Specifically, as shown in FIGS. 2 to 4, the holding body 2 includes a pair of elastic thin flat plate portions 5 and 5 which come into contact with or approach both side surfaces of the base end portion of the saw blade 1. , And a thin connecting plate 6 that connects the flat plate portions 5 and 5 at the central portion of one side edge portion thereof, and is integrally formed by press working or the like.

A stopper 7 in the shape of a short cylinder is formed at a substantially central portion of either one of the flat plate portions 5 and 5 by burring processing or the like.

The handle portion 3 has a slit 8 having a one-character cross section with a predetermined interval T having a bifurcated distal end, and a proximal end deep portion 9 of the slit 8 has a diameter D larger than the interval T. It has a circular cross section.

The holder 2 is fitted and fixed to the handle 3 such that the pair of flat plate portions 5 and 5 are aligned with the facing inner surfaces 10 and 10 of the slit 8.

Further, either one of the leading edges of the flat plate portions 5 and 5 projecting from the leading end surface of the handle portion 3 forms a saw blade insertion port by exposing the facing inner surface of the other leading edge portion. When the saw blade 1 has a small cutout 11 and is inserted between the flat plate portions 5 and 5, it can be easily inserted by inserting the base end of the saw blade 1 from the small cutout 11. .

The tip edges of both flat plate portions 5 and 5 are kept in a state of slightly protruding from the tip surface of the handle portion 3 by the amount of the small cutout portion 11 so as not to hit the plate when the saw is used ( (To avoid getting in the way). The shape and position of the small cutout 11 can be changed freely.

The fastener 4 slidably penetrates one of the forked ends 3 a of the handle 3 and the flat plate portions 5, 5 of the holder 2 in a skewered manner, and the forked end of the handle 3 is provided. Of the bolt 12 inserted into the other side 3b, a fixing member 13 such as a nut embedded in the other side 3b for fixing the bolt 12, and a wing nut screwed to the end of the bolt 12 protruding from the other side 3a. It consists of nut 14 and.

By tightening the nut 14, the pair of flat plate portions 5 and 5 are tightened together with the bifurcated distal end portion of the handle portion 3 to narrow the mutual interval between the flat plate portions 5 and 5 and to clamp the saw blade 1.・ Can be fixed. If the nut 14 is loosened, the elasticity (restoring force) of the bifurcated tip of the handle 3 and the flat plate portions 5 and 5 expands the mutual distance between the flat plate portions 5 and 5 to release the fixation. The blade 1 can be removed from the holder 2.

Since the fastener 4 is disposed on the slit tip opening side of the handle portion 3, as shown by the phantom line in FIG. 4, the mutual spacing between the flat plate portions 5 and 5 is from the base end side to the tip end side. It is tightened so that it gradually becomes narrower as it goes to. Therefore, as shown by the arrow A, the tightening force is concentrated on a part, and the length L from that part to the base end of the saw blade 1 (see FIG. 5) becomes long, so that the saw blade 1 is strong. Fixed to.

At this time, stress is likely to be concentrated in the rear end 9 of the base end of the slit 8. However, since the rear end 9 of the base end has a circular cross-section, it is possible to prevent cracking due to stress concentration. Moreover, since the diameter D of the proximal end deep portion 9 is larger than the interval T of the slits 8, the reaction force against tightening at the forked tip of the handle 3 can be reduced, and the tightening force is further increased. Further, since the pair of flat plate portions 5 and 5 are fastened together with the forked tip portion of the thick handle portion 3, wobble of the saw blade 1 can be prevented.

Further, as shown in FIGS. 2 and 5, the saw blade 1 has concave portions 15 and 16 of substantially V-shape at one side edge and the base edge of the saw blade 1, respectively. The bottom surface of the recess 15 contacts the bolt 12 and the bottom surface of the recess 16 contacts the stopper 7.

Then, in order to insert the saw blade 1 into the holding body 2 in the state shown in FIG. 5, as shown in FIG. 2, the saw blade 1 is slanted and is inserted between the flat plate portions 5, 5. After the concave portion 16 is brought into contact with the stopper 7, the saw blade 1 may be swung upward around the concave portion 16. If the procedure is reversed, the saw blade 1 can be pulled out from the holder 2.

It should be noted that the present invention is not limited to the above-described embodiments, and design changes can be freely made without departing from the gist of the present invention. For example, in the fastener 4, the fixing member 13 may be omitted and the bolt 12 may be directly fixed to the other 3b of the bifurcated tip of the handle 3.

[0027]

[Effect of device]

 Since the present invention is constructed as described above, it has a great effect as described below.

According to the saw as set forth in claim 1, a pair of flat plate portions 5, 5 are arranged along the facing inner surfaces 10, 10 of the slit 8 so that the flat plate portions 5, 5 project from the handle portion 3. No, so it doesn't get in the way of using the saw. Further, since the forked tip of the handle 3 acts like a "lever" when tightened by the fastener 4, the tightening force is increased, and the saw blade 1 can be fixed in a firm and stable state. Moreover, since the pair of flat plate portions 5 and 5 are fastened together with the forked tip portion of the thick handle portion 3, the saw blade 1 can be prevented from wobbling.

According to the saw according to claim 2, even if the fastener 4 is used to strongly tighten the bifurcated distal end portion of the handle portion 3 so as to become gradually narrower from the proximal end side toward the distal end side, the slit Since the base end deep part 9 of 8 has a circular cross section, it is possible to prevent the stress from being concentrated in the base end deep part 9 and cracking. Moreover, since the diameter D of the proximal end deep portion 9 is larger than the interval T of the slits 8, the reaction force against the tightening at the bifurcated distal end of the handle portion 3 becomes small, and the tightening force can be further increased.

According to the saw according to the third aspect, the saw blade 1 can be easily and quickly inserted between the flat plate portions 5 and 5 of the holding body 2. That is, since the tip end edge of one flat plate portion 5 is exposed by the small cutout portion 11, if the side surface of the base end portion of the saw blade 1 is brought into contact with the exposed inner surface of the flat plate portion 5, the facing inner surface. By simply sliding the saw blade 1 along the facing inner surface as it is, the base end portion of the saw blade 1 can be easily positioned so as to be inserted between the flat plate portions 5 and 5.

[Brief description of drawings]

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

FIG. 2 is a sectional side view of a main part.

FIG. 3 is a front view of a main part of a handle portion.

FIG. 4 is a plan view of a main part of a handle portion.

FIG. 5 is a sectional side view of a main part.

FIG. 6 is a side view of a main part showing a conventional example.

FIG. 7 is a cross-sectional plan view of an essential part showing a conventional example.

[Explanation of symbols]

 1 Saw Blade 2 Holder 3 Handle 4 Fastener 5 Flat Plate 8 Slit 9 Base End Deep 10 Opposed Inner Surface 11 Small Notch T Spacing D Diameter

Claims (3)

[Scope of utility model registration request] 1. A band plate-shaped saw blade 1, and a pair of thin flat plate portions 5, which can freely insert and remove the base end portion of the saw blade 1 and are in contact with or close to both side surfaces of the base end portion. 5, a metal holder 2 having 5 and a handle portion 3 having slits 8 each having a one-character cross section with a predetermined interval T having a bifurcated tip portion.
The holding body 2 is arranged such that the pair of flat plate portions 5 and 5 are arranged along the facing inner surfaces 10 and 10 of the slit 8, respectively.
The saw blade fixing fastener 4 which is fitted and tightens the pair of the flat plate portions 5 and 5 together with the bifurcated distal end portion of the handle portion 3 to narrow the mutual distance between the flat plate portions 5 and 5. A saw characterized by being provided on the opening side of the slit end of No. 3. 2. The saw according to claim 1, wherein the rear end deep part 9 of the slit 8 has a circular cross section having a diameter D larger than the interval T of the slit 8. 3. A band-shaped saw blade (1) and a pair of flat plate portions (5, 5) in which a base end portion of the saw blade (1) can be freely inserted and removed and which abuts or approaches both side surfaces of the base end portion. And a handle portion 3 into which the holder 2 is fitted, and either one of the tip edges of the flat plate portions 5 and 5 protruding from the tip end surface of the handle portion 3, A saw having a small cutout portion (11) for exposing a facing inner surface of the other tip edge to form a saw blade insertion opening.