JPH0642801Y2 - Spare blade type handle - Google Patents

Description

[Detailed description of the device] (Industrial application field) In addition to the rapid development of new building materials, especially laminated materials and integrated materials, processing with a saw, especially cutting work, has been diversified significantly. The selection of saw blades is of particular importance for adaptation, and in response to this demand, the development of so-called replaceable blades and their widespread use are rapid.

In order to allow a wide selection of saw blades actually used in the field depending on the target of saw processing, and to provide the benefit of immediate replacement use of saw blades worn down by use, Especially for the saw blade, it is necessary to standardize the connecting part to achieve a particularly detachable and accurate latching and to develop this handle to match it. It is well-known that it has a hook-shaped tail end that is biased toward the ridge side.

Therefore, under such a hook-shaped tail end,
Improvement of this handle that can be adapted to more accurate gripping of the blade,
This is what I am trying to propose.

(Prior Art) Japanese Utility Model Publication No. 53-1674, entitled "Saw," has a holding groove having a width capable of holding a base end portion of a saw blade and a back portion connected to the base end portion. In the groove distant from the groove bottom of the portion that clamps the base end portion, a locking portion whose side surface is formed in an arc shape is fixedly provided across both side surfaces of the groove, and the base end portion of the saw blade is provided. There is disclosed a device in which a recess formed in a notch, that is, a hook-shaped tail end is hooked, and a subsequent improvement is disclosed in Japanese Utility Model Publication No. 57-25724, in which the above-mentioned locking portion is provided on one side of the groove. There is also disclosed a device in which the inner surface is projected toward the other inner surface.
No. 1 and No. 37202, each of the above publications also includes the above-mentioned Jitsuko Sho 53-1674.
It has almost the same meaning as the gazette.

(Problems to be solved by the invention) In the known technique mentioned above, the locking part is concealedly provided in the holding groove of the saw blade holding part. There is often a confusion about whether to operate it, and there is a disadvantage that the mechanism of the latch is unclear and it is troublesome to reinstall it, whereas this device has a configuration in which the latch is exposed. It is an object of the present invention to provide a replaceable blade type handle which is easy to use for users who are unfamiliar with the operation of YOSHIBA, for example, do-it-yourself carpenters and young children, by making special efforts.

(Means for Solving the Problem) The present invention forms a folded portion having a U-shaped cross section in one half portion in the longitudinal direction, and the other half portion on the other side is preliminarily positioned on the extension thereof up to the bent edge of the folded piece. It consists of a bent / quenched steel piece that extends as a pair of tongue pieces facing each other by a notch formed in this way, and a wooden handle that is fixed by inserting and nailing the tongue piece pair of this steel piece as a basket. The steel piece has a hooking stud at the hook-shaped tail end of this spare blade and a pinching clip on the back ridge of the saw blade. The side wall is provided with a substantially fan-shaped notch corresponding to the outer contour of the hook-shaped tail end of the saw blade, and the hooked stud is projected from the other folded side wall in correspondence with the notch. This is a handle with a replaceable blade, which is characteristic The bending line of the ridge has a bending radius of a larger inner diameter than the mutual gap of the folded side walls, and the mutual gap of the folded side walls is
Being wider toward the bent edge of the folded back, and further, the minimum dimension of the mutual gap is slightly narrower than the thickness of the thinnest of the various types of saw blades, and the maximum dimension is also the most. It is more useful to make it slightly narrower than the thickness of thick ones.

FIG. 1 illustrates this replaceable blade type handle according to the present invention on the front side, and FIG. 2 on the front side, and FIG. One piece,
2 is a wooden handle.

The fold-formed / quenched steel slab 1 has a U-shaped foldback 3 formed on one side (left half) half 1a in the longitudinal direction extending to the left and right in FIG. 1, and the other half (right half) 1b on the other side. Then, it is assumed that the tongue piece pair 5 facing each other is stretched by a notch formed on the extension of the bent back 3 up to the bent edge 4 in advance. The tongue piece pair 5 is a so-called basket in a knife with a handle (for example, a sword) and is inserted into one end of the wooden handle 2 and fixed by a nail 6 and fixed integrally, and thus a part of the tail side is shown in FIG. The saw blade 7 is replaced and used to function as a replacement blade type handle.

The saw blade 7 is a hook-shaped tail end 8 as is known.
The steel piece 1 has a latching stud 9 for locking the hook-shaped tail end 8 and, under this locking, the rear spine of the saw blade 7 by the rotation shown by an arrow α in FIG. The flap 3 serves as a clip clip 10 so as to sandwich the peak.

Particularly, in this invention, a substantially fan-shaped notch 11 corresponding to the outer contour of the hook-shaped tail end 8 of the saw blade is provided on one of the folded side walls of the clip clip 10, which corresponds to this notch. On the other side of the folded back stud 9
Is cantilevered.

The latching stud 9 is a hook-shaped tail end 8 of the saw blade 7.
The end surface of the headed short shaft 13 to which the rolling collar 12 having an outer diameter capable of locking is fitted is integrated by, for example, spot welding along the other folded side wall. 14 is a welded nugget.

The clip clip 10 has a fan-shaped notch 11 adjacent to it.
In the vicinity of the boundary between and, one chamfered side wall faces the other chamfered side wall and chamfers the chamfer 15 shown by the broken lines in FIGS. 1 and 3 to mount the saw blade 7. Can be made easier.

At the opposite end of the fan-shaped notch 11 to the clip clip 10, one of the folded side walls is extended as shown in the drawing, and the mutual gap between the other folded side wall and the hook-shaped tail end of the saw blade 7. It may also serve as a second clip clip 17 for the tip 16 of the eight.

The clip clip 10, and further, the bent edge 4 of the foldback 3 forming 17 is subjected to bead-shaped bending work so as to have a bending radius of an inner diameter larger than the mutual gap of the foldback side walls, thereby preventing the clip. The spring action of the clip 10 can be used more effectively, and the mutual gap of the folded side walls is widened toward the bent edge 4 of the folded side, and the saw blades 7 having different thicknesses are used.
Can be effectively adapted to.

(Operation) In this handle according to the present invention, apart from this, various saw blades carried to the construction site are selected to suit the work content, and the hook-shaped tail end 3 as shown in FIG. 3 is selected. After locking with the latch stud 9, rotate it in the direction of arrow α in the figure,
The rear dorsal ridge of the saw blade 7 can be firmly clamped by the clip clip 10 and used for sawing. When the sharpness deteriorates after use, by adding a light stroke in the anti-α direction. It is also possible to easily attach and detach the new saw blade 7.

(Example) When the saw blade 7 has a uniform thickness and size, it is formed by bending.
The hardened steel piece 1 is provided with a bent edge 4 having a bending radius of an inner diameter equal to the side wall mutual gap of the folded back 3 with a uniform dimension such that the side wall mutual gap is an appropriate tightening margin corresponding to the thickness of the saw blade 7. When bent, formed, quenched, welded to the retaining stud 9, and then combined with the wooden handle 2, it was suitable for a saw blade of a single thickness size.

However, even if the size is the same, depending on the plate thickness tolerance of the material, the effect of the clip clip 3 may be slightly weakened at the minimum thickness. By tapering the mutual gap toward the bent back edge, it was possible to give a sufficient tightening margin to the saw blade having the minimum thickness within the range of the plate thickness intersection.

Next, in the actual sawing work, it is necessary to select and use various saw blades depending on the target, but in this case, the thickness size usually differs in the range of 0.4 to 0.7 mm, and further thickness crossover is added. However, there is no choice but to increase the above-mentioned taper, but at this time, the bent edge 18 of the folded back 3 has a bead shape as shown in FIG. The intervals are large enough to give a sufficient binding force to the blade, and the maximum size is slightly narrower than that of the thickest size, and the clips are held almost uniformly throughout all sizes. Could be realized without.

(Effect of the device) This replacement blade type handle according to the present invention is fitted with the hook-shaped tail end of the saw replacement blade when the saw blade is attached / detached and is exposed in the fan-shaped notch. Since the position of the saw blade can be immediately confirmed, the used saw blade can be removed and the new saw blade can be installed more reliably and easily, and no skill or special attention is required. Convenience is given.

[Brief description of drawings]

 FIG. 1 is a front view, FIG. 2 is a front view, and FIG. 3 is an explanatory view showing a use situation. 1 ... Bending forming / quenched steel piece 2 ... Wooden handle, 3 ... Folding edge 4 ... Bending edge 5 ... Tongue pair 6 ... Eye nail, 7 ... Saw blade 8 ... Hook-like tail end, 9 ... Latch stud 10 … Clips for pinching, 11… Fan-shaped notches

Claims (4)

[Scope of utility model registration request] 1. A fold having a U-shaped cross section is formed in one half of the longitudinal direction, and the other half of the other is opposed to each other by a notch formed so as to be positioned on the extension of the fold of the fold. It consists of a bent / quenched steel piece that extends as a pair of tongue pieces, and a wooden handle in which the pair of tongue pieces of this steel piece is inserted as a basket and fixed with eye-catching nails. This handle of the replaceable blade type has a hooking stud on the tail end and a clip clip on the back ridge of the saw blade. This is a replaceable blade type characterized in that a substantially fan-shaped notch is provided corresponding to the outer contour of the hook-shaped tail end, and the latching stud is projectingly provided on the other folded side wall corresponding to this notch. Handle. 2. The handle according to claim 1, wherein the bent edge of the folded back has a bending radius of an inner diameter larger than the mutual gap of the folded side walls. 3. The handle according to claim 1 or 2, characterized in that the mutual gap of the folded side walls is wider toward the bent edge of the folded back. 4. The minimum size of the mutual gap is slightly narrower than the thickness of the thinnest of the various types of saw blades, and the maximum size is also slightly narrower than the thickness of the thickest blades. The handle of claim 3 according to claim 3.