JPS6154427B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to replaceable blade scissors in which a replaceable blade body can be attached to and removed from the blade attachment portions of both scissor bodies.

In general, in scissors in which two scissors bodies are rotatably connected to each other approximately in the middle,
To ensure accurate cutting operations, there are holes in the longitudinal direction and scoops in the width direction on the back of the blade of the replaceable blade.
is provided.

The object of the present invention is to form both the backs of the blades of the interchangeable blades into a flat shape in order to facilitate polishing, and to forcibly form the above-mentioned "opening" between the backs of the blades when the interchangeable blades are installed. The purpose of the present invention is to provide a pair of scissors with a replacement blade that can be used for various purposes.

Hereinafter, the first embodiment embodying the present invention will be described as follows.
Referring to FIG. 10, reference numeral 1 denotes a replaceable blade body having a flat blade back 1a as shown in FIG. 3, and an engagement member 2 is fixed to the blade front 1b. Reference numeral 3 denotes a dovetail-shaped recess formed in the engagement member 2 so as to become tapered as it extends in the longitudinal direction of the blade face 1b, and both widthwise sides thereof are engagement grooves 3a;
As shown in FIG. 3, the width _L1 becomes narrower toward the outside. Reference numeral 4 denotes an elastic locking tongue protruding from the base end of the dovetail-shaped recess 3.

Reference numeral 6 denotes a blade mounting portion of the scissors body 5 having a rectangular cross-section as shown in FIG. ing. This blade attachment portion 6 is tapered to match the dovetail recess 3, and its width L ₂ and the width L ₁ of the dovetail recess 2 are such that the blade attachment portion 6 is inserted into the dovetail recess 3. Dimensions are set.
7 is a through hole formed at the base end of the blade attachment portion 6;
As shown in FIG. 6, is an elastic piece fixed to the proximal end of the elastic piece corresponding to the through hole 7, and as shown in FIG. It is now being inserted.

Now, attach the blade attachment part 6 of the scissors body 5 to the dovetail-shaped recess 3.
4, a gap 9 is formed between the concave side surface 6a (see FIG. 2) of the blade attachment portion 6 having a rectangular cross section and the inner bottom surface of the dovetail recess 3. When the blade attachment part 6 is completely fitted into the dovetail recess 3, an expanding force P acts on both sides of the locking member 2 as shown in FIG. As shown, it is curved in an arc shape so as to become convex toward the inside of the space 9, and is also curved in the direction of arrow A in FIGS. 6 and 8 along the curve of the blade attachment portion 6. At this time, the locking tongue 4 on the side of the replaceable blade 1 is locked in the through hole 7 of the blade attachment part 6 as shown in FIG. 9, and the replaceable blade 1 is prevented from coming off from the blade attachment part 6. Ru.

On the other hand, when removing the replaceable blade body 1 from the blade attachment part 6, when the tip of the elastic piece 8 is pressed, the locking tongue piece 4 is pushed by the protrusion 8a and detached from the through hole 7, and this state The blade attachment part 6 can be easily pulled out from the dovetail-shaped recess 3.

In this way, the pair of scissors bodies 5, to which the replaceable blade body 1 is attached in a state where it is bent in the longitudinal direction and the width direction, are attached to the shaft 1 so that they can be opened and closed, as shown in FIG.
At this time, a "gap" in the longitudinal direction and a "rake" in the width direction are formed between the blade backs 1a of the replaceable blade body 1.

Next, the second embodiment shown in FIGS. 11 to 16 will be described. Reference numeral 11 denotes a replaceable blade body in which the blade back 11a is formed into a planar shape, and the blade surface 11b has a blade on both sides in the width direction. A pair of engaging members 12 are fixed so as to extend. This engaging member 12 has a traction portion 12 that is substantially perpendicular to the blade surface 11b of the replaceable blade body 11.
The blade surface 1 is formed by a locking portion 12b that is bent at the tip thereof and is approximately parallel to the blade surface 11b of the replaceable blade body 11.
A pair of opposing locking portions 12b that protrude from a base portion 12c on 1b in a hook shape are oriented in opposite directions. As shown in FIG. 12, an engaging groove 13 extends inside the locking portion 12b in the longitudinal direction.
It is said that

Reference numeral 16 denotes a scissors body 15 to which the replaceable blade body 11 is attached.
The blade mounting part of the blade is composed of a mounting plate part 16A having a rectangular cross section and a mounting hole 17 formed therein, and a fitting part 16B that is separate from the mounting plate part 16A. It is slightly bent in the direction of arrow A in FIG. Locking portions 18 extending in the longitudinal direction are protruded from both sides in the width direction of the fitting portion 16B so as to face each other, and a locking groove 19 is formed inside the locking portions 18. This locking groove 19 is open at the base end of the fitting portion 16B, and extends halfway from the open end to the distal end side.

Now, when the replaceable blade body 11 is superimposed on one side of the mounting plate part 16A of the blade mounting part 16 and the engaging member 12 is inserted into the mounting hole 17 of the mounting plate part 16A, the first
As shown in FIG. 2, the base portion 12c of the engagement member 12 contacts the upper and lower portions of one side of the mounting plate portion 16A, and a gap 20 is formed between them. Also, the mounting plate part 16
The distance L between the other side surface of A and the inner surface of the locking portion 12b of the engaging member 12 becomes narrower toward the pulling portion 12a because the mounting plate portion 16A has a rectangular cross section.

Therefore, as shown by the imaginary line in FIG. 12, when the locking portion 18 of the fitting portion 16B is inserted into this distance L, a traction force acts in the direction of the arrow P in FIG. 13.
This force acts on the replaceable blade body 11 via the pulling portion 12a of the engagement member 12, and the replaceable blade body 11 moves toward the gap 20 side using the contact portion on the mounting plate portion 16A as a fulcrum B as shown in FIG. It curves in an arc shape and also curves in the direction of arrow A in FIGS. 14 and 16 along the curve of the mounting plate portion 16A.

In this way, the pair of scissor bodies 15, to which the replaceable blade bodies 11 are attached in a state where they are bent in the longitudinal and width directions, are attached to the shaft 10 so that they can be opened and closed as in the case shown in FIG. At this time, a "gap" in the longitudinal direction and a "rake" in the width direction are formed between the blade backs 11a of the replaceable blade body 11.

In addition, in the first and second embodiments described above,
It is also possible to curve only one of the blade attachment parts 1, 16 to form a "space" in the longitudinal direction between the blade backs 1b, 11b of the replaceable blade bodies 1, 11.

As described in detail above, the present invention provides the exchangeable blade bodies 1, 1.
The blade backs 1a and 11a of the scissors 1 are both formed into a flat shape, and at least one of the blade attachment parts 6 and 16 of the scissor bodies 5 and 15 is attached to the replaceable blade body 1, 11 side, and attach the fitting parts 6, 16B of the blade attachment parts 6, 16 to the replaceable blade bodies 1, 1.
When the blades 1, 11 are inserted into the engagement grooves 3a, 13 on the 1 side, the blades 1, 11 are also bent in the direction of the curve of the blade attachment parts 6, 16, so that the blade backs 1a of the blades 1, 11 are bent. ，
Not only can a "space" be formed in the longitudinal direction between 11a, but also the blade attachment parts 6, 16
Blade backs 1a, 11 of replaceable blade bodies 1, 11 when removed from
Since a is planar, it has the effect of making polishing easier.

[Brief explanation of the drawing]

Figures 1 to 10 show the first embodiment, with Figure 1 being an exploded perspective view showing only the blade portion of the replaceable scissors;
The figure is a sectional view of the blade attachment part of the scissors body, Figure 3 is a sectional view of the replaceable blade body and the engagement member, and Figure 4 is the dovetail-shaped recess of the engagement member and the blade attachment part of the scissor body fitted into it. Fig. 5 is a diagram showing the bending action of the replaceable blade body when the blade attachment part is inserted into the dovetail recess; Fig. 6 shows only the blade part of the replaceable blade scissors. 7 is an assembled sectional view of the case shown in FIG. 6, FIG. 8 is a partial sectional view showing the bending of the replaceable blade in the longitudinal direction, and FIG. 9 is an elastic locking tongue. FIG. 10 is a front view of the replaceable blade scissors, and FIGS. 11 to 16 show the second embodiment,
Fig. 11 is an exploded perspective view showing only the blade portion of the replaceable blade scissors, Fig. 12 is a partially enlarged sectional view showing the state in which the engagement member of the replaceable blade body is inserted into the mounting hole of the blade attachment part, and Fig. 13 is A line diagram showing the bending action of the replaceable blade body when the fitting part is inserted, Figure 14 is an assembled perspective view showing only the blade part of the replaceable blade scissors, and Figure 15 is a diagram showing the case shown in Figure 14. FIG. 16 is a partial cross-sectional view showing the bending of the replaceable blade body in the longitudinal direction. Replaceable blade body...1, 11, engaging member...2, 12,
Engagement groove...3a, 13, scissor body...5, 15, blade attachment part (fitting part)...6, blade attachment part...1
6. Mounting plate part...16A, fitting part...16B.

Claims (1)

[Claims] 1. A pair of scissor bodies 5, 1 each having a shaft 10 mounted thereon so as to be openable and closable.
5 and the replaceable blade bodies 1, 11 attached to the blade attachment parts 6, 16 thereof, and the replaceable blade bodies 1, 11 are attached to the blade attachment parts 6, 16 of the scissors bodies 5, 15. Engagement members 2, 12 in which engagement grooves 3a, 13 extending in the longitudinal direction are formed are fixed to the blade surfaces 1b, 11b, and these engagement members 2, 12 are fixed to the blade attachment parts 6, 16 of the scissors bodies 5, 15. In the replaceable blade scissors equipped with the fitting parts 6, 16B inserted into the engaging grooves 3a, 13 of the members 2, 12, the blade backs 1a, 11a of the replaceable blade bodies 1, 11 are both formed into a planar shape. , at least one of the blade attachment parts 6, 16 of the scissor bodies 5, 15 is bent toward the replaceable blade body 1, 11 toward the tip thereof, and the blade attachment part 6, When the 16 fitting parts 6, 16B are inserted into the engagement grooves 3a, 13,
A pair of replaceable blade scissors characterized in that the replaceable blade bodies 1 and 11 are also curved in the longitudinal direction along the curves of the blade attachment parts 6 and 16.