JPH081602A - Handgrip for replaceable blade type saw - Google Patents

Abstract

PURPOSE:To easily, effectively and rigidly detach or attach a replaceable blade by partly forming both the open leg skirt parts of turned edges in uneven steps near a safety catch, and forming a molded piece in the contour shape of an inverted U state. CONSTITUTION:A molded piece 3 has a pair of turned edges 3a, 3b extended in parallel in the generally contour sectional shape of an inverted U state. A safety catch 8 conforming to the base end latch of this replaceable blade at a position isolated from the innermost side of the edge is welded to spot welded nuggets 8a, 8b to be contained in the gap 3c formed of the edges 3a, 3b. The edges 3a, 3b of both open leg skirt parts are formed partly in uneven steps near the catch 8. The piece 3 is formed in the contour shape of an inverter U state in this area. The base end latch of the blade can be easily inserted into the gap 3c by the edge 3b in the uneven step area formed at the edges 3a, 3b.

Description

Detailed Description of the Invention

[0001]

[Industrial field of application] Contribute to the expansion of this version of the replacement blade type by the improvement of this particularly simple and accurate detachable handle of hand-grinding widely used for cutting of general woodworking including new building materials. It is intended to propose this replacement blade type handle.

[0002]

2. Description of the Related Art Japanese Utility Model Laid-Open Publication No. 1-174102
It is disclosed that a retaining ring that locks the proximal end of the saw blade that is sandwiched between the gaps formed by folding back with an inverted U-shaped cross-sectional contour shape is concealed inside the gap. There is. On the other hand, Japanese Utility Model Unexamined Publication No. 1-156902 discloses that a fan-shaped notch is provided on one side wall of the folded back so as to expose the stopper.

[0003]

When the retaining ring is hidden in the gap of the folded back, the sharp tip of the sawtooth remains until the end of the operation of hooking the blade of the saw blade. I'm touching my palm and don't feel glad that could cause injury.

However, the design in which the stopper is exposed exposes the cantilever, so there is some concern about the strength. Therefore, this handle of the replaceable blade type has only the hand to guide the locking of the base end of the saw blade against the internal stopper of the folded back so that it can be easily and accurately and firmly installed. It is an object of the invention to propose

[0005]

According to the present invention, a saw blade having a fold extending in an inverted U-shaped general cross-sectional contour shape, and a saw blade located away from the depth of the fold in a gap formed by the fold. In this handle of replaceable blade type, which is formed by fixing a molded piece of a rigid material having a stop ring for locking the base end hangers to the end of a handle rod made of wood or synthetic resin, This replaceable blade type handle is characterized in that the hem edges of both open legs partially make a difference in the vicinity of the stopper, and the molded piece has an inverted J-shaped cross-sectional contour shape in this partial area. Is.

In this case, the gap is provided with a local narrow region or the narrow region is clamped by the U-shaped clamp tip, which causes the gap between the folded legs to come into contact with each other at the front end away from the step difference region. I want more things.

Now, FIG. 1 illustrates an essential step in the middle of detaching the saw blade 2 on the handle 1 of the blade type according to the present invention, and 3 is a rigid material, for example, a steel plate punched in a predetermined shape. A molded piece which is folded and folded and then heat-treated as necessary, and 4 is a handle made of wood or synthetic resin in which a dent (nakago) 5 formed in the molded piece 3 is fixed to the end portion by, for example, a nail 6 Reference numeral 7 is a rod, and 7 is a base-end hook formed on the rear end of the spare blade 2.

The molded pieces 3 are paired with each other in an inverted U-shaped feed cross-section profile as shown in FIG. 2 (a), which is an enlarged cross section taken along line AA of FIG. 2 (a). It has folding backs 3a and 3b extending in parallel.

A stop ring 8 which fits the base end hook 7 of the saw blade 2 is provided inside the gap 3c formed by the folds 3a and 3b at a position spaced from the depth of the folds.
As shown in the example of the case where the spot welding nuggets 8a and 8b are welded in (c), they are installed internally. Turn back 3
In a and 3b, the hem edges of the folded back open legs partially differ in the vicinity of the stop ring 8, and the molding piece 3 has an inverted J-shaped cross-sectional profile in this partial region (FIG. 2). (See (c)).

Reference numeral 9 in the drawing denotes a non-slip ratchet wound around the outer circumference of the handle 4. Reference numeral 10 denotes a pair of notched tongues in which the bent front edge is partially cut off at the tapering front end of the molding piece 3, and the interval between these is closed in advance at the molding stage or, for example, the above-mentioned U.S. Pat. The tightening piece (which is disclosed in Japanese Patent Laid-Open Publication No. 10-96, which is narrowed by a spring clamp, can serve as a holding portion for further firmly and surely suppressing the back end ridge of the saw blade 2.

[0011]

[Operation] This handle of the above-mentioned replacement blade is a saw material (usually a special brushing special) with uniform thickness size (for example, 0.5 mm or 0.8 mm) Strip steel (JIS G3311; S60 CM, S70
0.40mm when belonging to a series that uses
If it is more than 0.60mm, the tolerance is ± 0.035mm and the thickness is 0.60mm.
If the tolerance is ± 0.045 mm (both with thickness tolerance B) for mm or more and less than 0.90 mm, 0.5 m
m saw blade has tmax of 0.535mm and tmin of 0.465m
The maximum and minimum range in m is 0.07 mm, and the tolerance is 0.09 mm with a 0.8 mm saw blade, so the clearance 3c for accommodating the saw blade is made to accommodate the maximum thickness. At least, the saw blade with the minimum thickness cannot avoid rattling.

[0012] This relationship is more serious if the aim is to conform to this handle which is common to saw blades having different thickness sizes, for example, from 0.3 mm to 0.9 mm. In any case, the gap 3c While making the opening width at the hem edge of both folded back legs correspond to tmin, the gap 3c is widened so that tmax can be accommodated at the back of the folded back. It can be adapted to saw blades.

In this case, the opening width of the gap 3c is narrowed, and the engagement of the base end rattle 7 of the saw blade 2 with the stopper 8 interposed in the gap 3c is apt to be hindered.
However, in the present invention, the hem edges of both the open legs of the folding back 3 partially make a step difference in the vicinity of the stop ring 8, and the molded piece has an inverted J-shaped cross-sectional contour shape in this partial area, so that this step difference area. It is relatively easy to pry the stop ring 8 into the gap 3c, especially in this partial area.
It is possible to fit the base end eyeglasses 8 to the stopper eyeglasses 8 more easily by making the area locally wide.

The clearance 3c is formed at the front end remote from the stopper 8 by folding back at the front end and causing mutual contact between the hem parts of both the open legs during the molding process of the molding piece 3 or Depending on whether the portion is tightened by the U-shaped crank tip, the saw blade 2 can be securely clamped here.

[0015]

[Example] This replaceable blade type handle, which is mainly composed of a molded piece 3 shown in FIG. 2 that has been heat treated to a thickness of 1.0 mm, has a hem edge 3b in a stepped region attached to the folded back open leg hem edges 3a, 3b. The base end hook 7 of the saw blade 2 can be easily pryed into the gap 3c, and thus the base end hook 7
It was possible to easily and accurately and firmly stop the stopper 8 provided in the gap 3 with ease.

In the case of forming the step difference region in the case of FIG. 2, a part of the stop ring 8 is slightly exposed from the one hem edge 3a of the folded back, but as shown in FIG. 2 and FIG. Is hidden, and in particular, as shown in FIG. 3, there is no change in the function in each case where the helicopter of the hem edge 3a is partially layered around the stop ring 8.

[0017]

EFFECT OF THE INVENTION According to the present invention, a stepped region is formed on the hem edges of both folded legs forming a gap provided with a stop ring 8 for scooping the base end snap 7 of the saw blade 2. Since it has a guide action, the saw blade 2 can be easily and surely attached to the handle of the saw blade 2 without requiring consideration of strength.
The saw blade can be easily and accurately attached and detached.

[Brief description of drawings]

FIG. 1 is a front view showing a saw blade of a saw blade and a waist of a handle in the middle of a detaching step.

2 (a), (b) and (c) are a front view and a front view of this handle and a sectional view taken along the line AA of FIG. 2 (a).

FIG. 3 is a front view of a modified example.

FIG. 4 is a front view of a modified example.

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[Procedure amendment]

[Submission date] July 6, 1994

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] Full text

[Correction method] Change

[Correction content]

[Document name] Statement

[Title of the invention] Spare blade type handle

[Claims]

Detailed Description of the Invention

[0001]

[Industrial field of application] Contribute to the expansion of this version of the replacement blade type by the improvement of this particularly simple and accurate detachable handle of hand-grinding widely used for cutting of general woodworking including new building materials. It is intended to propose this replacement blade type handle.

[0002]

2. Description of the Related Art In Japanese Utility Model Laid-Open No. 1-174102, a stop ring for locking a base end hook of a saw blade which is inserted into a gap formed by a folded back extending in an inverted U-shaped cross-sectional profile. Is disclosed to be hidden inside the gap. On the other hand, Japanese Utility Model Unexamined Publication No. 1-156902 discloses that a fan-shaped notch is provided on one side wall of the folded back so as to expose the stopper.

[0003]

When the retaining ring is hidden in the gap of the folded back, the sharp tip of the sawtooth remains until the end of the operation of hooking the blade of the saw blade. I'm touching my palm and don't feel glad that could cause injury.

However, in the case of the design in which the locking eyeglasses are exposed, since it is cantilevered, there is some concern about the strength. Therefore, this handle of the replaceable blade type has been devised to guide the locking of the base end of the saw blade against the internal stopper of the flap so that it can be easily and accurately and firmly installed. It is the object of the invention to propose.

[0005]

According to the present invention, a saw blade having a fold extending in an inverted U-shaped general cross-sectional contour shape, and a saw blade located away from the depth of the fold in a gap formed by the fold. In this handle of replaceable blade type, which is formed by fixing a molded piece of a rigid material having a stop ring for locking the base end hangers to the end of a handle rod made of wood or synthetic resin, This replaceable blade type handle is characterized in that the hem edges of both open legs partially make a difference in the vicinity of the stopper, and the molded piece has an inverted J-shaped cross-sectional contour shape in this partial area. Is.

In this case, the gap has a local narrow area or the narrow area is clamped by a U-shaped clamp tip, leading to contact between the hem parts of both legs when folded back at the front end away from the step difference area. Is more worrisome.

Now, FIG. 1 illustrates an essential step in the middle of detaching the saw blade 2 on the handle 1 of the blade type according to the present invention, and 3 is a rigid material, for example, a steel plate punched in a predetermined shape. A molded piece which is folded and folded and then heat-treated as necessary, and 4 is a handle made of wood or synthetic resin in which a dent (nakago) 5 formed in the molded piece 3 is fixed to the end portion by, for example, a nail 6 Reference numeral 7 is a rod, and 7 is a base-end hook formed on the rear end of the spare blade 2.

The molded pieces 3 are paired with each other in an inverted U-shaped feed cross-section profile as shown in FIG. 2 (a), which is an enlarged cross section taken along line AA of FIG. 2 (a). It has folding backs 3a and 3b extending in parallel.

A stop ring 8 which fits the base end hook 7 of the saw blade 2 is provided inside the gap 3c formed by the folds 3a and 3b at a position spaced from the depth of the folds.
As shown in the example of the case where the spot welding nuggets 8a and 8b are welded in (c), they are installed internally. Turn back 3
In a and 3b, the hem edges of the folded back open legs partially differ in the vicinity of the stop ring 8, and the molding piece 3 has an inverted J-shaped cross-sectional profile in this partial region (FIG. 2). (See (c)).

Reference numeral 9 in the drawing denotes a non-slip ratchet wound around the outer circumference of the handle 4. Reference numeral 10 denotes a pair of notched tongues in which the bent front edge is partially cut off at the tapering front end of the molding piece 3, and the interval between these is closed in advance at the molding stage or, for example, the above-mentioned U.S. Pat. The tightening piece (which is disclosed in Japanese Patent Laid-Open Publication No. 10-96, which is narrowed by a spring clamp, can serve as a holding portion for further firmly and surely suppressing the back end ridge of the saw blade 2.

[0011]

The gap 3c is formed at the front end remote from the stopper 8 by folding back at the front end and causing mutual contact between the two hem parts of the open legs during the forming process of the forming piece 3 or Depending on whether the portion is tightened by the U-shaped clamp tip, the saw blade 2 can be securely held here.

[0012]

[Example] This handle of the replaceable blade type, which is mainly composed of the molded piece 3 shown in FIG. 2 that has been heat-treated to a thickness of 1.2 mm, has a skirt edge 3b in a stepped region attached to the folded back open leg hem edges 3a, 3b. The base end hook 7 of the saw blade 2 can be easily inserted into the gap 3c, and therefore the base end hook 7 can be easily inserted in the gap 3 provided in the gap 3. I was able to stop it accurately and firmly.

In the case of forming the stepped region, a case where a part of the stop ring 8 is slightly exposed from one hem edge 3a of the folded back in the case of FIG. 2 is shown. As shown in FIGS. Is hidden, and in particular, the function remains the same in each case in which the helicopter of the hem edge 3a partially extends around the stop ring 8 as shown in FIG.

[0014]

EFFECTS OF THE INVENTION According to the present invention, the stepped areas are formed in the hem portions of the folded back legs which form a gap provided with a stop ring 8 for scooping the base end hook 7 of the saw blade 2. Because of its guiding action, the saw blade 2 can be easily and surely attached to the handle of the saw blade, and the saw blade can be easily and accurately attached and detached without worrying about reduction in strength. it can.

[Brief description of drawings]

FIG. 1 is a front view showing a saw blade of a saw blade and a waist of a handle in the middle of a detaching step.

2 (a), (b) and (c) are a front view and a front view of this handle and a sectional view taken along the line AA of FIG. 2 (a).

FIG. 3 is a front view of a modified example.

FIG. 4 is a front view of a modified example.

Claims (3)

[Claims] 1. A saw blade having folds 3a, 3b extending in an inverted U-shaped general cross-sectional contour shape, and a saw blade 3a, 3b formed in the gap 3c, which is spaced from the depth of the folds. Stopper 8 that locks the base end hook 7 of 2
In this handle of the replaceable blade type, in which the molded piece 3 made of a rigid material interposed between is fixed to the end of the handle rod 1 made of wood or synthetic resin, the hem portions of both of the folding legs 3a and 3b are stopped. There is a partial step difference in the vicinity of the bed 8, and the molded piece 3 is formed in this partial area.
However, this replaceable blade type handle is characterized by having an inverted J-shaped cross-sectional profile. 2. The handle according to claim 1, wherein the gap is provided with a local narrowed region where the front ends of the legs apart from the stepped region are folded back and contact between the hem portions of both legs of the legs is folded back. 3. The handle according to claim 1, wherein the narrow region is sandwiched by U-shaped clamp tips.