JPH09201801A - Bade-replaceable saw - Google Patents

Abstract

PROBLEM TO BE SOLVED: To attach and detach a tang of a replacement saw easily to a handle while the tang of the saw can be stably firmly attached by providing a notch wherein a holding mouthpiece imparts with a spring function near a narrowing end to a side narrowing to an inner part. SOLUTION: A holding mouthpiece 5 mounted in a grip handle 2 has a pair of notches 8, 8 near narrowing ends of a pair of bent raised interior narrowing side edges 7, 7. A pair of the notches 8, 8 give the interior narrowing side edges 7, 7 inward spring action near the narrowing end. The holding mouthpiece 5 is housed in a butt end part of the grip handle 2. A tang of replacement saw 1 is stopped by friction in the grip handle 2 since a spring function is given to the interior narrowing side edges 7, 7 by the notches 8, 8 near the narrowing end. Then, holding the mouthpiece 5 is incorporated into the grip handle 2 with a rivet 6. Shaking of the saw blade can be removed by such the constitution.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a hand-saw saw, especially a double-edged saw (with both horizontal and vertical saws), and is a replaceable blade type that is easy to handle and can be attached and detached accurately. The idea is to propose a saw.

[0002]

2. Description of the Related Art Japanese Utility Model Publication No. 52-55197, No. 6-
No. 25295 and Japanese Utility Model Publication No. 4-98103,
At the fore edge of the grip handle for a hand-saw saw, a pair of inner narrows bent and raised at angles corresponding to the gentle slopes on both sides of the core (or stem; basket) forming the narrowing edge of the saw blade. A common replaceable saw is disclosed in which a holding mouthpiece for frictionally locking the core at a side edge is housed and united by eye fastening, and the saw replacement blade is detachable from the grip handle. .

[0003]

SUMMARY OF THE INVENTION A holding mouthpiece integrated with a conventional grip handle for a hand-saw saw frictionally locks a core forming a narrow end of a saw replacement blade at its inner side edge. In order to fully satisfy the requirements, it is essential that the holding mouthpiece and the core have a gentle narrowing slope, but in reality, the depth of the fitting, that is, the end of the core and the holding mouthpiece A stronger hit is likely to occur between the terminal on the side edge of the inner side and the side edge.

At this time, the fitting of the core in the mouth of the holding mouthpiece is loose, and if the wedge effect is incomplete, it is easy to slip off.
Since it can't stop rattling, there are a lot of obstacles in the work.

In order to avoid such an inconvenience, it has been attempted, conversely, to make the inclination angle 2θ forming a gentle slope of the end narrowing of the core smaller than the intersection angle 2θ 'of the inner side edge of the holding die. When the saw blade is relatively thick, for example, 0.9 to 1.2 mm, such as double-edged blade, burrs are apt to occur in the core during punching by a press in the manufacturing process. The wear angle is more pronounced at the tip of the core, so the inclination angle 2θ is stronger and the angle of intersection is 2θ ′.
It becomes smaller and wins.

[0006] However, as a result, a stronger hit is made at the mouth of the holding mouthpiece, but the rattling at the back of the fitting is unavoidable, and this also causes a touch in operation.

[0007]

According to the present invention, both sides of a gentle slope are attached to a core (3) forming a narrow end of a saw blade (1) at the end of the grip handle (2) for a hand saw. A holding mouth ring (5) for frictionally locking the core (3) by a pair of inner narrowing side edges (7) and (7) bent and raised at an angle (2θ ') corresponding to the inclination (2θ) is housed. However, the holding mouthpiece (5) is a replaceable blade type saw in which the grip handle (2) and the nail (6) are united to make the saw replacement blade (1) detachable from the grip handle (2). , The holding base (5) narrows and the side edge (7),
(7) is a replaceable blade type saw having notches (8) and (8) for imparting a spring function in the vicinity of the narrowed end, and notches (8) and (8) ) Comprises punched holes (9), (9), notches (8),
(8) or the punching holes (9), (9) are those obtained by punching prior to bending and raising the side edges (7), (7), and the grip handle (2) for a hand saw. At the edge of the fore edge, a pair of inner narrowing sides bent and raised at an angle (2θ ′) corresponding to the two-sided inclination (2θ) of the gentle slope attached to the core (3) forming the narrowing end of the saw blade (1) A holding base (5) for frictionally locking the core (3) at the edges (7) and (7) is housed, and the holding base (5) is united by a grip handle (2) and a nail (6). Then, a replaceable blade type saw in which the replaceable saw blade (1) is attachable to and detachable from the grip handle (2), wherein the forked part (4) is provided at the tail end of the core (3) of the replaceable saw blade (1). On the other hand, it is more preferable that the holding mouth ring (5) is provided with cut-and-raised parts (10), (10) which are in spring contact with the forked part 4 while forming the above.

[0008]

DETAILED DESCRIPTION OF THE INVENTION A saw blade 1 shown in FIGS.
Partly showing the external appearance of the grip handle 2
Is a core that forms the end of the saw blade 1, 2θ is this core 3
It is the angle of both sides of the gentle slope attached to. 4 in FIG.
Is a bifurcated portion formed on the end of the core 3 in another example. FIG.
In (b), 5 is a holding mouthpiece which is housed in the fore edge of the grip handle 2 and then united with the grip handle 2 by eye nails 6, and 7 is bent at an angle 2θ 'corresponding to the angle 2θ of the above-mentioned two-sided inclination. It is no different from the conventional method that the core 3 is frictionally locked by the pair of raised side edges.

In the present invention, the holding die 5 preferably has a pair of notches 8 and 8 in the vicinity of the narrowed ends of the inner narrowing side edges 7 and 7, preferably, is punched and formed by a press prior to the bending and raising, and cut. The notches 8 and 8 can thereby impart an inward spring action to the inner narrowing side edges 7 and 7 in the vicinity of the narrowed end.

Further, as shown in FIG. 2, the notches 8 and 8 may be replaced by the punching holes 9 and 9 which are not separated from each other, and the cutouts 8 and 8 may be replaced by the punching holes 9 and 9. The edges 7, 7 can be provided with a bending spring action.

As shown in FIGS. 3 (a) and 3 (b), a saw blade having a forked portion 4 at the tip of the core 3 in order to eliminate the above-mentioned incomplete frictional engagement, It is assumed that the tail ends have cut-and-raised parts 10, 10 that frictionally engage with the bifurcated part 4. In any of the above cases, FIG. 1B, FIG. 2 and FIG.
As shown in (b), the above-mentioned bending of the narrowed side edges 7, 7 can be made slightly deeper than a right angle to further strengthen the frictional engagement with the core. 1 (b),
In FIG. 2 and FIG. 3B, reference numeral 11 is a tip bending claw of the holding mouthpiece 5.

[0012]

EXAMPLE A core 3 of a saw-replacement blade 1 as a double-edged hand-grinding saw shown in FIG. 1 (a) was finished to have a gentle slope with a 2θ of 5 ° 30 '.

On the other hand, as shown in FIG. 1 (b), the holding mouth ring 5 was housed at the end of the grip handle 2 and the grip handle 2 was united with the nails 6.

The holding mouthpiece 5 has a pair of narrowed side edges 7 having an angle 2θ 'of 5 ° 30' corresponding to both sides of a gentle gradient attached to the core 3, but has a notch at the narrowed end. Nos. 8 and 8 further bent toward the inner narrowing to give a spring function.

The saw blade 1 is 1.2 mm thick and
After punching, the burrs generated on the core 3 are removed by shot blasting so that the edge is rounded, so that the gentle inclination of both sides of the core 3 is apparently 5 ° 3.
Although it was slightly smaller than 0 ', when it was fitted to the inner side edge of the holding mouthpiece 5, the spring function provided near the narrowed end was also added and rattling was done by tapping the rear end of the grip handle 2 lightly. While a strong saw blade can be attached without causing any trouble, on the contrary, the saw blade can be easily detached by utilizing the inertial force of tapping the tip bending claw 11.

[0016]

According to the present invention, the core of the saw blade can be stably and firmly attached to the holding mouthpiece in the grip handle without rattling, and the attachment / detachment can be extremely easily performed.

[Brief description of drawings]

FIG. 1 is a view showing the separated blade type saw and a handle separated from each other.

FIG. 2 is a perspective view of another embodiment of the holding cap.

FIG. 3 is a perspective view of a replaceable blade saw having a bifurcated portion and a holding mouthpiece corresponding thereto.

[Explanation of symbols]

 1 Saw replacement blade 2 Grip handle 3 Core 4 Forked portion 5 Retaining jaw 6 Eye nail 7,7 A pair of narrowed side edges 8,8 Notch 9,9 Punch hole 10,10 Cut and raised

Claims (4)

[Claims] 1. At the fore edge of the grip handle (2) for a hand saw,
A pair of inner narrowing side edges (7) bent and raised at an angle (2θ ′) corresponding to both gentle inclinations (2θ) attached to the core (3) forming the narrowing end of the saw blade (1), (7)
The holding mouth ring (5) for frictionally locking the core (3) is housed in, and the holding mouth ring (5) is united by the grip handle (2) and the eye nail (6), and the saw blade (1). ) Is a detachable blade type saw that can be attached to and detached from the grip handle (2), and the holding mouthpiece (5) is a cutting blade that imparts a spring function in the vicinity of the narrowed ends to the side edges (7) and (7). Lack (8),
A replaceable blade saw having (8). 2. The replaceable blade type saw according to claim 1, wherein the notches (8), (8) are punched holes (9), (9). 3. The notches (8), (8) or the punching holes (9), (9) are formed by punching prior to bending and raising the side edges (7), (7). 1
Replacement blade type saw described in. 4. At the fore edge of the grip handle (2) for a hand saw,
A pair of inner narrowing side edges (7) bent and raised at an angle (2θ ′) corresponding to both gentle inclinations (2θ) attached to the core (3) forming the narrowing end of the saw blade (1), (7)
The holding mouth ring (5) for frictionally locking the core (3) is housed in, and the holding mouth ring (5) is united by the grip handle (2) and the eye nail (6), and the saw blade (1). ) Is a detachable blade type saw that can be attached to and detached from the grip handle (2). The fork (4) is formed at the tail end of the core (3) of the saw blade (1), while the holding mouthpiece ( 5) A replaceable blade type saw characterized in that cut and raised parts (10) and (10) which are in spring contact with the forked part 4 are provided in 5).