JPH0970802A - Two blade replacement saw - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an appropriate exchange saw which is easy of the attaching/detaching replacement of a saw blade and is considered of the effective utilization of resources and the improvement of environmental pollution associated with the generation of waste. SOLUTION: A saw blade 2 in which saw blade 1 of almost the same kind are formed on both longitudinal side margins is constituted so that its base part 3 is made to exist to be placed in a space formed between holder parts 5, 5 which are the right and left parts of the divided ends of a handle 4 and usually to be able to press-lock oppressively by a fixing means 7 installed in the space, and the press lock by the means 7 for the blade 2 can be released when the saw blade 2 is to be replaced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a double-edged replaceable saw in which saw blades having saw teeth on both longitudinal edges are detachably and replaceably connected to a handle.

[0002]

2. Description of the Related Art Generally, if the saw body and the handle are integrally fixed so that they cannot be removed, there is the inconvenience of replacing the saw body and making it bulky when not in use. In view of such a situation, a saw blade having a saw blade engraved on the handle is detachably connected as a replaceable blade, and only the saw blade is replaced, so that the entire saw is reused. A saw, a so-called replacement saw, is widely used.

On the other hand, in recent years, the problem of reduction of waste generation has been taken up from the standpoint of further improving environmental pollution, and in addition, a replacement saw that can contribute to resource saving by making effective use of resources. Development is strongly demanded.

By the way, as such a conventional replacement saw, there is a conventional example (A). As seen in many replacement saws, saw blades are engraved only on one side edge of the saw blade. Conventional example (B). For example, as disclosed in Japanese Utility Model Publication No. 6-25296, saw blades are provided with different types of saw teeth, such as longitudinal and horizontal teeth, fine and coarse teeth, on both longitudinal edges. There is.

[0005]

However, in the case of the above-mentioned conventional example (A), needless to say, it is not possible to effectively utilize the other longitudinal side edge of the saw blade on which the saw teeth are not engraved. Further, in the case of the conventional example (B), since the purpose of use of the saw teeth formed on both side edges of the saw blade is different, when the use of only one saw tooth is concentrated and the saw tooth reaches the end of its life, Even if the other saw blade is unused or is in a state close to it, the saw blade will have to be discarded due to its original purpose of use, and the saw blade will be discarded anyway. In addition to inducing excessive consumption of steel, etc., it is not possible to contribute to groundbreaking resource saving by making effective use of resources.
An unfavorable situation occurred in terms of environmental protection due to the generation of a large amount of waste.

The double-blade replaceable saw according to the present invention has an easy-to-attach / detach saw blade in order to solve the above problems, and is a suitable replacement saw in view of effective use of resources and improvement of environmental pollution due to waste generation. Is intended to be provided at low cost.

[0007]

In order to achieve such an object, a double-edged replaceable saw according to the present invention comprises a saw blade 2 having saw teeth 1 of substantially the same kind formed on both longitudinal edges, and a base 3 of the saw blade 2.
The tip end is sandwiched so as to be housed in a space 6 formed between the left and right holder parts 5 and 5, and locking means is provided in the space 6 so as to be able to face the base 3 of the saw blade 2. 7, the pressing operation means 8 for pressing the locking means 7 is operated with the top end 9 thereof slightly protruding outward from the holder parts 5, 5, 5. Is provided with a pressing force applying means 10 for rotatably rotatably pivoting the engaging means 7 and for normally urging the position restricting member 1 provided in the handle 4.
The base portion 3 of the saw blade 2 abutting on 1 is elastically press-locked by the locking means 7, and when the saw blade 2 is replaced, the pressing operation means 8 is applied with a pressing force. It is characterized in that the pressing lock by the locking means 7 on the saw blade 2 can be released by performing a pressing operation against the means 10.

[0008] The term "holder" as used herein means, in addition to the case of a separate body made of a pair of metal fittings or the like supported by a handle made of wood or synthetic resin, which is made of a different material, as will be described in the following embodiments. It is a general term for a wide concept such as a case where a slit is formed on itself or a case where two side plates are pasted and formed, and the position regulating member is limited to a regulating rod as shown in the following examples. Instead, it includes a wide range of saw blade bases having the same function that can be reliably locked and positioned at the insertion position in the handle.

[0009]

The double-blade replaceable saw according to the present invention operates as follows. First, the saw blade 2 is inserted in advance so that one of the longitudinal side edges to be used faces downward and contacts the position regulating member 11 between the left and right holder parts 5, 5. State, the base 3 of the saw blade 2
Is held at a predetermined storage position sandwiched between the holder portions 5 and 5. The base portion 3 of the saw blade 2 is securely engaged with the locking means 7 and is elastically pressure-locked, so that the so-called saw blade 2 is inserted and held with respect to the handle 4 to form a substantially straight saw. It is kept in use.

Then, when the saw blade on the one longitudinal side edge is worn out by use and reaches the end of its service life, the saw blade on the other unused longitudinal side edge is used first. The body 2 must be once removed from the handle 4, but in this case, the top end 9 of the pressing operation means 8 is removed.
Is pressed against the spring force (pressing force applying means) 10 to release the press lock of the saw blade 2 by the locking means 7, and then the base 3 of the saw blade 2 is pulled out of the handle 4. You can separate them.

After that, the saw blade 2 is inverted so that the other unused long side edge side of the saw blade 2 to be used faces downward, and the inverted saw blade 2 is connected to the handle 4 again. However, in this case, the top end 9 of the pressing operation means 8 is previously pressed against the spring force 10 by the finger of one hand to keep the lock released, and in this state, the other hand is pressed. The base portion 3 of the new saw-tooth saw blade 2 to be replaced is inserted into the position regulation member 11 between the left and right holder portions 5 and 5 formed at the tip of the handle.

Then, the base 3 of the saw blade 2 is eventually replaced by the handle 4
The base portion 3 of the saw blade 2 reaches a predetermined storage position sandwiched between the holder portions 5 and 5 by coming into contact with the position regulating member 11 provided on the. Next, by releasing the pressing force of the pressing operation means 8 by the finger, the base portion 3 of the saw blade 2 is engaged with the locking means 7 and is elastically pressure-locked, and the saw blade 2 is fixed to the handle 4 again. On the other hand, it is possible to use the saw in a substantially straight shape which is inserted and held.

Next, again, the saw teeth on the other longitudinal side edge side are also consumed by use and reach the end of their service life. In other words, the saw teeth on both longitudinal side edges are in a used state.
When the need for a spare blade arises, the used saw blade 2 is pressed from the handle 4 against the top end 9 of the pressing operation means 8 against the spring force (pressing force applying means) 10. After releasing the pressure lock by the locking means 7 for the saw blade 2,
The base 3 of the saw blade 2 is pulled out of the handle 4 to be removed, and the pressing operation of the pressing operation means 8, that is, the pressing lock of the locking means 7 with respect to the saw blade 2 is released, so that it should be used again. As described above, the saw blade 2 is connected to the handle 4 so that one longitudinal side of the saw blade 2 faces downward, and the same operation is repeated thereafter.

The saw blade 2 is attached to the handle 4 by the position regulating member 11, the locking means 7, and the pressing force applying means 1.
By the mutual cooperation action of 0, the position is surely regulated without rattling, the quick and one-touch connection and holding is performed, and the smooth sawing action is enabled.

[0015]

Since the double-edged replaceable saw according to the present invention has the above-mentioned structure and operation, it has the following effects. That is, since it is possible to use saw blades on both sides of the saw blade in which saw teeth of almost the same kind are formed on both longitudinal edges, the effective utilization of the same saw blade is doubled, and the consumption of steel material etc., which is the material of the saw blade, is halved. Not only can it contribute to epoch-making resource saving, but it can also contribute to the improvement of environmental pollution caused by waste generation. Further, the saw blade can be smoothly attached / detached to / from the handle without any rattling, and can be performed smoothly, quickly, and surely.

[0016]

Embodiments of the present invention will be described below in detail with reference to the drawings. 1 to 4 show an embodiment of a double-edged replaceable saw according to the present invention. FIG. 1 is an exploded perspective view of the double-edged replaceable saw as a whole, and FIG. 2 is a partially cutaway front view showing a main part of FIG. ,
3 is a front view seen from the direction of arrow III-III in FIG. 1, and FIG. 4 is a plan view of a part of the assembled state of FIG.

In these figures, reference numeral 2 denotes a saw blade having a substantially uniform thickness. The saw blade 2 has the same saw blade 1 on both longitudinal edges.
(The same saw teeth are engraved symmetrically with respect to the longitudinal axis of the saw blade).
A base 3 having a uniform narrow width is formed between steps 12 and 12 provided at upper and lower portions that are separated from the rear end by a certain distance forward, and the base 3 has a U-shaped recess. 16 are provided.

The base portion 3 is sandwiched so as to be housed in the space 6 of the holder portions 5 and 5 formed of left and right metal fittings forming the tip of the handle 4, and these holder portions 5 and 5 are arranged from the outside thereof. It is held in a forked tip portion 14 provided on the wooden handle portion, and is integrally attached by the stoppers 13, 13. Then, in one holder part 5, several restriction rods standing upright toward the other holder part 5 are provided, and in the other holder part 5, at a position facing each of these restriction rods, There are provided a plurality of insertion holes each having a size and a sufficient depth such that the restriction rod can be just inserted, and the pair of position restriction members 11 are formed by the restriction rod and the insertion hole.
Is said.

More specifically, as shown in FIGS. 2 and 3, one of the holder portions 5 has a step portion 1 of the saw blade 2.
The regulating rods provided at positions that can respectively face the base portions 2 and 12 of the saw blade 2 and the base portion 3 of the saw blade 2 are fitted in the insertion holes provided in the other holder portion 5 so that they are stored in the gap 6 as described above. Steps 12, 12 and U of the saw blade 2
The character-shaped recess 16 is locked to each of the regulation rods, and the saw blade 2 is completely prevented from being laterally or vertically displaced in the holder portions 5 and 5, and the saw blade 2 is prevented. Is reliably positioned in the handle 4 at the insertion position, and the function of preventing rotation of the saw blade 2 with respect to the holder portions 5, 5 can be exerted. At the insertion position of the saw blade 2 in the handle 4, the pressing operation means 8
A pair of locking means 7, 7 that are integrally provided on the base 3 and can be seen from both sides of the base 3 are stored.

Recesses are provided in the holder portions 5 and 5 facing the insertion position of the base portion 3 of the saw blade 2, and one cavity 17 is formed by aligning these recesses. The through hole 19 provided in the pressing operation means 8 is inserted into the pivot 18 projecting from the one holder portion 5 corresponding to the lower part of the space 17, and the pivot operation is performed with the pivot 18 as a fulcrum. The means 8 is pivotally supported.
The space 17 penetrates at least upward, and is formed in a substantially fan shape so that the pressing operation means 8 can be rotated and housed. The top end 9 of the pressing operation means 8 extends from the penetrating portion to the holder portion 5,
It slightly projects from 5 so that it can be pressed upward.

Further, in the empty space 17, a pressing operation means 8 is provided.
The pressing force applying means 10 (in the present embodiment, from the space 17 located above the holder part 5 to press the part near the apex end 9 forward so as to contact the front wall of the space 17). A hollow portion 20 coil spring having a proper length, which is recessed rearward, is installed therein.

The base 3 of the saw blade 2 which is sandwiched between the holders 5 and 5 and is in the position-regulated state by the force of the pressing force applying means 10 is normally engaged by the engaging means 7 and 7. The saw blade 2 is elastically pressure-locked. On the other hand, when the saw blade 2 is replaced, the pressing means 8 is pressed against the pressing force imparting means 10 to lock the saw blade 2 with the locking means 7. It is configured so that the pressure lock due to can be released.

Next, FIG. 4 shows another embodiment of the double-edged replaceable saw according to the present invention, in which the spindle 21 can be freely inserted into and removed from the spindle 21 at the saw blade axis at the rear end of the saw blade 2. Groove 2 to be inserted
2 is provided on the other hand, on the other hand, at the tip of the holder portions 5, 5 of the handle 4, the pressing lever 23 is provided with the holder portions 5, 5.
The upper half of the pressing lever 23 is rotatably supported around a fulcrum 24 so that the upper half of the pressing lever 23 projects upward from the inside of the holder portions 5 and 5.

The pressing lever 23 has a front lower half portion including a fulcrum 24, which is an inverted U-shaped portion which can be fitted between the holder portions 5 and 5, and which is divided into two portions.
The engagement pin 25 is pierced. Also, the saw blade 2
The back edge and the abdominal edge of the rear end portion are vertically semi-symmetrical and have a substantially semi-circular cutout 2 that can engage with the engagement pin 25.
6 is provided. Then, normally, the rear end of the pressing lever 23 is urged by the pressing force applying means 10 which is a leaf spring, and the base 3 of the saw blade 2 is provided in the shaft 4 serving as a position restricting member provided on the handle 4, and the cut groove 22 is formed. And the engaging pin 25 with the upper notch 2
6 so that the saw blade 2 can be used in a substantially straight line with respect to the handle 4, and the base portion 3 of the saw blade 2 has locking means similar to the embodiment. 7, so that the so-called saw is used in a state in which it is positively engaged with and elastically pressed and locked.

Next, when the saw teeth on the one longitudinal side edge are worn out by use and reach the end of their useful life, the saw blade on the other longitudinal side edge is used or another saw blade 2 is used.
The saw blade 2 must be removed from the handle 4 in order to replace it with a blade. In this case, the pressing lever 23 is pressed against the leaf spring serving as the pressing force applying means 10, and the saw blade 2 is moved. By releasing the pressure lock by the locking means 7 against, the base 3 of the saw blade 2 is pulled away from the handle 4,
The saw blade 2 can be removed from the handle 4.

Then, the other longitudinal side edge side to be newly used or one longitudinal side edge side of another exchanged saw blade 2 is made to face downward on the saw blade axis at the rear end portion of the saw blade 2. When the engaging groove 25 is inserted into the support shaft 21 and the engaging pin 25 is engaged with the upper notch 26 respectively, and the hand is released, the base 3 of the saw blade 2 is securely engaged with the engaging means 7. It engages and is elastically pressure-locked, and the saw blade 2 is again kept in a use state of a substantially straight saw inserted into the handle 4.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of an entire saw showing an embodiment of a double-edged replaceable saw according to the present invention.

FIG. 2 is a partially cutaway front view showing a main part of FIG.

FIG. 3 is a front view seen from the direction of arrow III-III in FIG.

FIG. 4 is a partially sectioned plan view in the assembled state of FIG.

FIG. 5 is a drawing corresponding to FIG. 2, showing another aspect of the double-edged replaceable saw according to the present invention.

[Explanation of symbols]

1; saw blade, 2; saw blade, 3; base (saw blade), 4; handle,
5; Holder part, 6; Void, 7; Locking means, 8; Pushing operation means, 9; Top end, 10; Pushing force applying means, 11; Position regulating member, 12; Step portion, 13; Stopper, 14; Bifurcated tip, 15; Insertion hole (of position regulating member), 16; U-shaped recess (of saw blade base), 17; Space (for storing pressing operation means), 18; Axis (pressing) Fulcrum of operating means), 19; through hole (of pressing operation means), 20; cavity (for spring loading),
21; support shaft, 22; kerf, 23; pressing lever, 24; fulcrum, 25; engagement pin), 26; upper recess.

Claims (1)

[Claims] 1. A saw blade (2) having saw teeth (1) of substantially the same type formed on both longitudinal edges of a saw blade (2) in a space (6) formed between holder portions (5, 5) divided into left and right halves at a tip of a handle (4). The holding means 7 is housed so as to be housed, the locking means 7 is housed in the space 6 so as to be able to face the base portion 3 of the saw blade 2, and the pressing operation means 8 for pressing the locking means 7 is operated. , With its top end 9 slightly protruding outward from the holder parts 5 and 5,
A pressing force applying means 10 for rotatably rotatably attaching to the holder parts 5, 5 and for urging the locking means 7 is provided, and normally abuts against a position regulating member 11 provided in the handle 4. The base portion 3 of the saw blade 2 is elastically pressure-locked by the locking means 7, and when the saw blade 2 is replaced, the pressing operation means 8 resists the pressing force applying means 10. The double-edged blade replacement saw, wherein the pressing lock by the locking means 7 on the saw blade 2 can be released by the pressing operation.