JPH0647414Y2 - Structure of the center of rotation in scissors - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention supports a pair of scissor pieces so as to be openable and closable by a rotation center shaft, and has heads at both ends of the rotation center shaft on the outer surfaces of both scissors pieces. Scissors in which both scissor pieces are sandwiched by superposition through a washer, and the heads at both ends of this rotation center shaft and both washers are capped with a cap, or
A pair of scissors, which are openably and closably supported by a rotation center shaft, overlap the outer surfaces of both scissors pieces to sandwich the scissors pieces. It is a thing.

[Problems to be Solved by Conventional Techniques and Inventions] Conventionally, some scissors of this type are provided with a cap on the central axis of rotation thereof for the purpose of decorative effect.

However, for example, in kitchen scissors, even if the rotation center shaft part of the scissors is capped with a cap, a gap is created in the insertion part of the rotation center shaft for both scissors pieces, and vegetable scraps etc. enter from the gap. Corrosion may occur and rust may occur on the insertion part of the rotation center shaft.

Therefore, an object of the present invention is to provide scissors in which vegetable waste or the like does not enter the insertion portion of the rotation center shaft.

[Means for Solving the Problems] In the present invention, a pair of scissors pieces are supported to be openable / closable by a rotation center shaft, and heads at both ends of the rotation center shaft are attached to the outer surfaces of both scissors pieces via washers. In the scissors in which both scissors pieces are sandwiched by clasping, and the heads at both ends of the rotation center axis and both washers are capped with caps, the diameter of the washer increases toward the inner side of the outer periphery of the washer. A taper portion is formed so as to be small, and a pressure contact surface is formed on the peripheral portion of the cap to be pressed against the taper portion of the washer, and this pressure contact is also applied to the outer surface of the scissor piece to close the inside of the cap The point is to provide a surface.

Further, the washer is used as a countersunk spring washer, and a gap is provided between the scissors before the sandwiching of the scissors and the outer surface of the scissors. The gist is to provide a closing surface for closing the inside of the countersunk spring washer by pressing the countersunk spring washer against the outer surfaces of the scissors pieces.

Furthermore, a pair of scissors is supported by a pivoting center shaft so that it can be opened and closed.
For scissors with caps capped on the heads at both ends of the rotation center shaft that overlaps the outer surfaces of both scissors pieces and clamps both scissors pieces, the outer circumference of the head of the rotation center shaft is inward. A tapered portion is formed so that the diameter of the head becomes smaller toward the head, and a press contact surface is formed on the peripheral portion of the cap that is pressed against the taper portion of the head, and this press contact causes a pressure contact with the outer surface of the scissor piece. The main point is to provide a closing surface that closes the inside of the cap.

[Operation] In the present invention, when the cap is capped, the force with which the pressure contact surface of the cap is pressed against the washer or the taper portion of the rotation center shaft is
The closed surface of the cap acts as a force to be pressed against the outer surface of the scissors piece, and the inside of the cap is closed.

Also, when both scissor pieces are attached to the outer surface of both scissor pieces by overlapping the heads of both ends of the rotation center axis through the belleville spring washers, the washer is attached to the scissor piece by mounting the rotation center axis. The washer is pressed against the outer surface and the inside of the washer is closed by the closing surface of the washer.

[First Embodiment] Hereinafter, the first to third embodiments of the kitchen scissors according to the first embodiment of the present invention will be described.
It will be described with reference to the drawings.

As shown in FIG. 2, the scissors of this embodiment are configured such that a pair of scissors pieces 1 are rotatably supported at a rotation center portion A and can be opened and closed.

As shown in FIGS. 1 and 3, a flat spring washer 2 is superposed on the outer surfaces of the scissor pieces 1, and the scissor pieces 1 are inserted through the flat spring washers 2.
A rivet 3, which is the central axis of rotation, is inserted in the.

As shown in FIG. 3, the countersunk spring washer 2 has a gap 4 with respect to the outer surface of the scissor piece 1 before the rivet 3 is inserted and fixed.
By the insertion, the counter spring washer 2 is pressed against the outer surface of the scissor piece 1, and the inner surface of the peripheral edge of the counter spring washer 2 serves as a closing surface that closes the inside of the counter spring washer 2.

A taper portion 6 is formed on the entire outer peripheral portion of the washer 2 so that the outer diameter of the washer 2 becomes smaller toward the inner side, and a chamfer 7 is provided on the outer end of the outer peripheral portion of the washer 2.

The bezel spring washer 2 and the head 3a of the rivet 3 are capped with a cap 8. As shown in FIG.
A tapered pressure contact surface 9 having an inner diameter slightly smaller than the outer diameter of the spiral spring washer 2 is formed on the inner surface of the peripheral portion of the cap 8, and when the cap 8 is crowned, the pressure contact surface 9 of the spiral spring washer 2 is formed. It is adapted to be pressed against the taper portion 6. The force with which the pressure contact surface 9 of the cap 8 is pressed against the taper portion 6 of the belleville spring washer 2 acts as a force with which the opening end edge of the cap 8 is pressed against the outer surface of the scissor piece 1, and Is provided with a closing surface 10 for closing the inside of the cap 8.

Since the interior of the countersunk spring washer 2 and the interior of the cap 8 are closed in this way, vegetable scraps and the like enter the insertion portion of the rivet 3 that is the rotation center axis and corrode, and due to this corrosion, the rivet 3 It is possible to prevent rust from being generated in the insertion part of the.

[Second Embodiment] In the first embodiment, a rivet, which is a central axis of rotation for both scissor pieces 1, is formed by superposing a belleville spring washer 2 on the outer surface of both scissor pieces 1. I have inserted 3
As shown in FIG. 4, in the second embodiment, the central axis of rotation is composed of the bolt 11 and the nut 12, and the head 11a of the bolt 11 and the nut 12 are directly scissors without the belleville spring washer 2 interposed. The outer surface of the piece is polymerized. Only differences from the first embodiment of the configuration of the present embodiment will be described below. Head 11a of bolt 11 and nut 12 are entirely inward, and head 11a of nut 11 and nut 11 are directed inward. A tapered portion 13 is formed so that the outer diameter of 12 becomes smaller, and a chamfer 14 is provided on the head portion 11a of the bolt 11 and the outer end of the outer peripheral portion of the nut 12.

When the cap 8 is capped, the pressure contact surface 9 of the cap 8 is bolt 11
The force of the nut 12 and the tapered portion 13 of the nut 12 presses the closing surface 10 of the cap 8 against the outer surface of the scissor piece 1, and the inside of the cap 8 is closed by the closing surface 10.

In this way, since the inside of the cap 8 is closed, vegetable scraps and the like enter the portion where the bolt 11 and the nut 12 that are the pivot shafts are inserted and corrode, and this corrosion causes the bolt 11 and the nut 12 to be attached. It is possible to prevent rust from being generated on the part.

[Effects of the Invention] As described in detail above, in the present invention, since the inside of the cap is closed, vegetable scraps enter the insertion portion of the rotation center shaft and corrode, and this corrosion causes the rotation center shaft. It is possible to prevent the formation of rust on the insertion part of.

In addition, when the heads at both ends of the rotation center shaft are superposed on the outer surfaces of both scissor pieces through the belleville spring washers and both scissor pieces are sandwiched, the insides of the washers are closed, so the rotation center It is possible to further prevent rust from occurring in the insertion portion of the rotation center shaft due to corrosion of vegetable scraps or the like entering the insertion portion of the shaft.

[Brief description of drawings]

1 to 3 show scissors according to a first embodiment of the present invention.
The figure is a cross-sectional view showing the structure of the rotation center portion of the scissors, FIG. 2 is a front view of the scissors, FIG. 3 is a cross-sectional view showing a flat spring washer before the rotation center shaft is inserted, and FIG. It is sectional drawing which shows the structure of the rotation center part of the scissors which is 2nd Example. Scissors piece 1, Belleville spring washer 2, Rivets 3, Void 4, Closure surface
5,10, taper part 6,13, cap 8, pressure contact surface 9, bolt 1
1, nut 12.

Claims (3)

[Scope of utility model registration request] 1. A pair of scissors pieces (1) are supported by a rotation center shaft (3) so as to be openable and closable, and heads at both ends of the rotation center shaft (3) are provided on the outer surfaces of both scissors pieces (1). 3a) is polymerized through a washer (2) to attach both scissors pieces (1), and the heads (3a) at both ends of the rotation center shaft (3) and both washers (2) are capped (8). ), The tapered portion (6) is formed on the outer peripheral portion of the washer (2) so that the diameter of the washer (2) becomes smaller toward the inner side, and the peripheral portion of the cap (8) is formed. Is formed with a pressure contact surface (9) that is pressed against the tapered portion (6) of the washer (2), and is pressed against the outer surface of the scissor piece (1) by this pressure contact to close the inside of the cap (8). A structure of a center of rotation in scissors, which is provided with a closing surface (10). 2. A washer spring washer (2) is used as the washer, and a space (4) is provided between the scissor spring washer (2) and the outer surface of the scissor piece (1) before the two scissors are attached. By providing the scissor spring washers (2) on the peripheral edge of the scissor spring washers (2) by pressing the scissor spring washers (2) against the outer surface of the scissor springs (1). 2. A structure of a rotation center portion of scissors according to claim 1, wherein a closing surface (5) for closing the inside of the scissors is provided. 3. A pair of scissors pieces (1) for rotating a central axis (11, 12)
The open heads (11a, 12) at both ends of the pivoting center shaft (11, 12) are supported so that they can be opened and closed by overlapping, and the outer surfaces of both scissors pieces (1) are superposed on each other. In the scissors crowned by the cap (8), the diameter of the head (11a, 12) becomes smaller toward the outer periphery of the head (11a, 12) of the rotation center shaft (11, 12). The tapered portion (13) is formed so as to form a pressure contact surface (9) which is in pressure contact with the tapered portion (13) of the head (11a, 12) at the peripheral edge of the cap (8). A structure of a rotation center portion of scissors, which is provided with a closing surface (10) which is pressed against the outer surface of the scissors piece (1) by pressing to close the inside of the cap (8).