JP3113501B2 - This pattern of spare blade type - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[Industrial application] Hand-grinding widely used for cutting work in general woodworking, including new building materials. This simple and accurate improvement of the detachable handle contributes to the expansion of the use range of the replaceable blade type. It is intended to propose this intended replacement blade type handle.

[0002]

2. Description of the Related Art Japanese Unexamined Utility Model Publication No. 1-174102 discloses a stop-gap which locks a base hook of a replacement blade which is inserted into a gap formed by folding in an inverted U-shaped cross-sectional profile. Is concealed within the gap. On the other hand, Japanese Utility Model Laid-Open Publication No. 1-156902 discloses that a fan-shaped notch is provided on one side wall of the turn-back so as to expose the stopper.

[0003]

In the case where the stopgap is hidden in the folded gap, the cutting edge of the sharp sawtooth is cut until the operation of pulling the sword with the squeezing blade is completed. He was touching his palm and could cause injury.

[0004] However, the design that exposes the stopgear is cantilevered, which does not mean that there is no concern about strength. Therefore, this handle of the replacement blade type, which has been designed to guide the base hooking of the replacement blade against the internal stop ring of the folded back so that it can be achieved easily, accurately and firmly, can be achieved easily. It is an object of the present invention to make a proposal.

[0005]

According to the present invention, there is provided a reversing blade which is provided with a fold extending in an inverted U-shaped general cross-sectional profile, and which is spaced apart from the depth of the fold in a gap formed by the fold. In this replacement blade type handle, a molded piece of a rigid material interposed with a stopper for locking the base hook of the above is fixed to the end of a handle rod made of wood or synthetic resin. The handle of this type is a replaceable blade type, characterized in that the hem edges of both open legs are partially stepped in the vicinity of the stopgear, and the formed piece has an inverted J-shaped cross-sectional profile in this partial area. It is.

[0006] In this case, the gap has a local narrow area or a narrow area is sandwiched by a U-shaped clamp tip. Is more desirable.

FIG. 1 illustrates a point in the middle of attaching and detaching a saw blade 2 to and from a handle 1 of the blade type according to the present invention. Reference numeral 3 denotes a rigid material, for example, a steel plate punched in a predetermined shape. A molded piece formed by folding and forming and then heat-treated if necessary, and 4 is a handle made of wood or synthetic resin in which a cage 5 formed on the molded piece 3 is fixed to an end portion thereof with an eye nail 6, for example. Reference numeral 7 denotes a base hook formed on the rear end of the replacement blade 2.

The molding pieces 3 are parallel to each other in a pair with a general inverted U-shaped cross-sectional profile, as is apparent from an enlarged cross-section taken along the line AA of FIG. 2 (a) shown in FIG. 2 (c). It has folds 3a and 3b that extend.

In the gap 3c formed by the folds 3a and 3b, at the position spaced apart from the depth of the fold, a stopper 8 adapted to the base hook 7 of the saw blade 2 is shown in FIG.
As shown in the example of the case where the nuggets 8a and 8b of spot welding are used for welding in FIG. Turn 3
In FIGS. 2A and 2B, the hem edges of the two open legs are partially stepped in the vicinity of the stopper 8 and the molded piece 3 has an inverted J-shaped cross-sectional profile in this partial area (FIG. c)).

Reference numeral 9 in the figure denotes a non-slip rattan winding provided on the outer periphery of the handle rod 4. Reference numeral 10 denotes a pair of notched tongue pieces in which the bent edge is partially cut back at the tapered front end of the formed piece 3, and the notch tongue pair 10 causes the gap 3c to be separated from the stepped region. At the front end, there will be a local narrow region 11.

[0011]

The gap between the pair of notched tongue pieces 10 is previously narrowed in the molding step of the molded piece 3 or, for example, as described in the above-mentioned Japanese Utility Model 1-17.
By narrowing with a tightening piece (spring clamp) such as a U-shaped clamp tip disclosed in Japanese Patent No. 4102, it can be used as a holding portion for more firmly and surely suppressing the rear ridge of the replacement blade 2.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A handle of a replaceable blade type mainly consisting of a molded piece 3 shown in FIG. The base hook 7 of the saw blade 2 can be easily inserted into the gap 3c, so that the base hook 7 provided in the gap 3 can be easily used. I was able to stop it accurately and firmly.

The stepped region is formed in the case of FIG. 2 in the case where a part of the stopper 8 is slightly exposed from one of the folded hem edges 3a, but as shown in FIGS. Is hidden, and the function does not change in any case where the helicopter of the skirt 3a partially extends along the periphery of the stopper 8 as shown in FIG.

[0014]

According to the present invention, a stepped area is formed in the both open leg hem portions which form a gap with a stopper 8 interposed between the base hook 7 of the saw blade 2 to bend. Therefore, it is possible to easily and surely attach the saw blade 2 to this handle under its inducing action, and it is possible to easily and accurately attach and detach the saw blade 2 without worrying about a decrease in strength. it can.

[Brief description of the drawings]

BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is a front view showing a saw blade and a waist portion of a handle during a detachment stage.

2 (a) is a front view of the handle, FIG. 2 (b) is a front view, and FIG. 2 (c) is a sectional view taken along 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)

(57) [Claims] 1. A replacement blade which is provided with a folded portion 3a, 3b extending in a general inverted U-shaped cross-sectional profile, and in a gap 3c formed by the folded portions 3a, 3b, which is spaced apart from the depth of the folded portion. Stopper 8 that locks the base hook 7 of 2
In this handle of a replaceable blade type, in which a molded piece 3 of a rigid material interposed is fixed to the end of a handle rod 1 made of wood or synthetic resin, both open leg hem portions of the folded back portions 3a and 3b are stopped. This handle of the replaceable blade type characterized in that a step is partially formed in the vicinity of the ridge 8, and the formed piece 3 has an inverted J-shaped cross-sectional profile in the step region. 2. The handle according to claim 1, wherein the gap (3c) has a local narrow region (11) at the front end of the molded piece (3) remote from the stepped region. 3. The handle according to claim 2, wherein the local constricted area is clamped by a U-shaped clamp tip.