JPH081603A - Handgrip for replaceble blade type saw - Google Patents

Abstract

PURPOSE:To prevent the tremble shake and to establish the alignment by providing a spring finger piece oppositely in pressure contact with the side of the base end latch of a replaceable blade at the locking position of the latch to a safety catch at the one turned edge of a molded piece. CONSTITUTION:A molded piece 3 has a pair of turned edges 3a, 3b extended in parallel in the generally contour sectional shape of an inverter U state. A safety catch 8 conforming to the base end latch of this replaceable blade at the position isolated from the inner most position of the edge is welded to spot welded nuggets 8a, 8b and contained in a gap 3a formed of the edges 3a, 3b. A pair of spring finger pieces 11 to be engaged with both the edges 3a, 3b on the way of the rotation of the latch in the case of mounting the blade are formed together with a cutout opening 12. Since the latch of the blade is suppressed from its side by the pieces 11 and effectively held, an allowance can be provided in the gap 3c.

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 saw blade is completely attached, and especially when a thin saw blade is attached, the saw blade is clamped only at one front clamping portion. In addition to this, since the peripheral edge of the base blade of the spare blade is a free end, rattling may occur due to the gap with the inside of the molded piece, or it may be sandwiched only in front. There is a problem that alignment cannot be obtained between the replaceable blade and the handle, which causes a difficulty in cutting during the cutting work, or an inability to cut straight.

Therefore, when the saw blade is completely attached, rattling is prevented and alignment is established by removing the gap between the blade and the inside of the molded piece near the base edge of the blade. It is an object of the present invention to improve the easiness of the cutting work of the blades and the improvement of the straight cutting workability.

[0005]

The present invention has folds 3a and 3b extending in an inverted U-shaped general cross-sectional profile.
In the gap 3c formed by these turns 3a and 3b,
A molded piece 3 of a rigid material provided with a stopper ring 8 for locking the base end hook 7 of the saw blade 2 separated from the inside of the folded back is attached to the end of the handle rod 1 made of wood or synthetic resin. In this handle of the replaceable blade type that is fixed to the part, at least one of the above-mentioned molded pieces is folded back at the position where the base end of the saw blade is engaged with the stopper. The handle of the replaceable blade is characterized in that it directly or indirectly has spring finger pieces which face the side surface of and contact the side surface with pressure.

In this case, at least one of the folded back pieces of the molding piece has a notch opening for holding the spring finger piece through the window hole, and the molding piece has a base end hook of the saw blade. It has a tip region consisting of a spring-biased narrow gap that clamps the dorsal ridge of the saw blade in the locking position with respect to the stop ring, and the spring finger pieces apply the base end when the saw blade is attached. It is desirable to have free ends projecting in the direction of rotation of the glasses, or for the spring fingers to be separate deformed leaf springs.

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.

As is apparent from the enlarged cross section taken along the line AA of FIG. 2 (a) shown in FIG. 2 (b), the molded pieces 3 are paired in parallel with each other in an inverted U-shaped general sectional profile. It has folding backs 3a and 3b extending to the outside.

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 in the case of welding the spot welded nuggets 8a and 8b in (b), it is built in. Turn back 3
a and 3b are illustrated with respect to the case where the folded open leg bottom edges partially make a difference in the vicinity of the stop ring 8 and the molding piece 3 has an inverted J-shaped cross-sectional contour shape in this partial region. (See FIG. 2B).

Reference numeral 9 in the drawing denotes a non-slip ratchet wound around the outer circumference of the handle 4. Reference numeral 10 is 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 actual Kaihei 1-174102. By narrowing it with the tightening piece (spring clamp) disclosed in Japanese Patent Publication, it can be used as a sandwiching portion for more firmly and surely suppressing the proximal back ridge of the saw blade 2. 1 and 2 (a),
In the case shown in (b), a pair of spring finger pieces 11 which both of the folding backs 3a and 3b engage during the rotation of the arrow of the base end snap 7 when the saw blade 2 is attached, Notch opening
Form with 12.

[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 difference in m is 0.07 mm, and the tolerance for the saw blade of 0.8 mm is as high as 0.09 mm, so when the clearance 3c for accommodating the saw blade is made to correspond to the maximum thickness. A saw blade with at least a minimum thickness cannot avoid rattling.

This relationship is even more remarkable if the aim is to adapt to this common handle when the thickness of the saw blade varies from 0.3 mm to 0.9 mm, for example. If the opening width of the gap 3c is narrowed here, this gap 3c
The engagement of the base end girder 7 of the saw blade 2 with the stopper girder 8 interposed in the blade is hindered, and the win is likely to occur. However, according to the present invention, the spring finger piece 11 suppresses the base end burr 7 of the saw blade 2 from the side surface and securely holds it, so that a clearance C can be provided.

[0013]

[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 inserted toward the clearance 3c, and therefore the base end hook 7 can be easily and accurately applied to the stopper 8 provided in the clearance 3. It can be stopped and is firmly clamped by the spring finger pieces 11.

As shown in FIG. 3, the spring finger pieces 11 are folded back 3a,
You may make it insert in the notch opening 12 by the inward bending end of another U-shaped leaf spring which surrounds the hem edge of 3b at the side near the handle 4. As shown in FIG. 4, the spring finger pieces 11 may be formed by spot welding the leaf spring p to the inner surface of the molding piece 3 prior to bending the folded back portions 3a and 3b, and then bending the leaf springs p. As shown in FIG. 5, a U-shaped spring q along the bending edge of the molded piece 3
The distal end of the corrugated spring r into the gap 3c through the notch opening 12, or as shown in FIG.
Alternatively, a pair may be attached to one side of b to engage with the notch opening 12 at both ends so as to pinch the base end wear of the saw blade 2 at the smooth curved portion.

Further, the spring finger piece 11 is folded back 3 as shown in FIG.
A slide button b is fitted in a slide guide slot S formed in one of a and 3b, for example, 3b, and this slide button b is fixed to a spring finger piece 11 composed of a wedge spring t, and the wedge spring t The slide button b may be slid so as to firmly sandwich the base end hook 7 of the saw blade between the blades for firm clamping.

In each of the above-described various embodiments, the function of stably supporting the base end side of the saw blade by pressing and clamping the base end girder 7 of the saw blade by the spring finger pieces 11 against the side surface of the saw blade is provided. Common.

[0017]

As described above, according to the present invention, the base end girder 7 of the saw blade 2 is stopped by the stop girder, and the base end girder is pressed from its side surface by the spring finger piece 11. It is possible to prevent rattling by holding at two points, that is, holding and holding at the front, and by establishing alignment, it is possible to improve the easiness of the cutting work and thus the straight cutting workability.

[Brief description of drawings]

FIG. 1 is a front view showing a main part of a saw blade and a handle of a saw during a detaching step.

2 (a) and 2 (b) are a front view of this handle and FIG.
It is an AA sectional view of (a).

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

FIG. 4 is a partial cross-sectional view of a modified example.

FIG. 5 is a partial cross-sectional view of a modified example.

FIG. 6 is a partial cross-sectional view of a modified example.

FIG. 7 is a partial cross-sectional view of a modified example.

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[Procedure amendment]

[Submission date] July 15, 1994

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] 0002

[Correction method] Change

[Correction content]

[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.

[Procedure Amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0012

[Correction method] Change

[Correction content]

This relationship is even more remarkable if the aim is to adapt to this common handle when the thickness of the saw blade varies from 0.3 mm to 0.9 mm, for example. If the opening width of the gap 3c is narrowed here, this gap 3c
The engagement of the base end girder 7 of the saw blade 2 with the stopper girder 8 interposed in the blade is hindered, and the win is likely to occur. However, according to the present invention, the spring finger piece 11 suppresses the base end lash 7 of the saw blade 2 from the side surface and reliably holds the gap 3c.
You can add a margin to.

[Procedure 3]

[Document name to be amended] Statement

[Correction target item name] 0013

[Correction method] Change

[Correction content]

[0013]

[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 toward the clearance 3c, and therefore the base end hook 7 can be easily and accurately applied to the stopper 8 provided in the clearance 3. It can be stopped and is firmly clamped by the spring finger pieces 11.

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 a replaceable blade type in which a molded piece 3 made of a rigid material is fixed to the end of a handle rod 1 made of wood or synthetic resin, at least one of the folded pieces is a saw blade. Of the replaceable blade type, characterized in that it has a spring finger piece that faces the side surface of the proximal end glazing and is in pressure contact with the side surface of the proximal end glazing 7 at the locking position with respect to the stop wing 8. Handle. 2. The handle according to claim 1, wherein the spring finger piece 11 has a cutout opening 12 which is held through the window hole. 3. The handle according to claim 1, wherein the spring finger pieces are separate deformable leaf springs.