JPH0646670U - Structure of the center of rotation in scissors - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide scissors having a structure of a pivoting center part that is easy to assemble, easy to manufacture, and low in cost. [Structure] A pair of scissors pieces 1 are supported to be openable and closable by a rotation center axis A, and both ends 3a, 3b of the rotation center axis A are supported on the outer surfaces of both scissors pieces 1.
Are superposed on each other via the cap attachment member 2 and the like, and the scissors pieces 1 are sandwiched. The rotation center portion A constituted by both ends 3a and 3b of the rotation center axis A, the cap mounting member 2, and the like is attached to the cap 5
Be crowned by. Then, four protrusions 6 are provided on the outer peripheral side surface 8 of the cap mounting member 2 at equal intervals. Cap 5
In the state in which the center of rotation A is covered, the projection 6 presses the opening inner side surface 7 of the cap 5, and the cap 5 is pressed and locked to the cap mounting member 2.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a structure of a rotation center portion of scissors in which a pair of scissors pieces are rotatably supported by a rotation center shaft and the rotation center portion is capped with a cap.

[0002]

[Prior art]

 Conventionally, as the scissors of this type, the present applicant has proposed the structure shown in FIG. 4 in Japanese Utility Model Application Laid-Open No. 2-988867. The pair of scissors pieces 21 are supported by a rotation center shaft 23 so as to be openable and closable. The heads 23a at both ends of the rotation center shaft 23 are superposed on the outer surfaces of the scissors pieces 21 via washers 22 so that the scissors pieces 21 are sandwiched. The heads 23 a and both washers 22 at both ends of the rotation center shaft 23 are capped with caps 25. A tapered portion 26 is formed on the outer peripheral portion of both washers 22 so that the diameter of both washers 22 becomes smaller toward the inner side. A pressure contact surface 27, which is in pressure contact with the tapered portions 26 of the both washers 22 is formed on the peripheral portion of the cap 25 in a tapered shape. A closing surface 24 is provided which is pressed against the outer surface of the scissors piece 21 by this pressure contact and closes the inside of the cap 25. Further, as another conventional example, the taper portion 26 and the like are omitted and the cap and the washer which is a cap mounting member are bonded and fixed to each other with an adhesive.

[0003]

[Problems to be solved by the device]

 However, in Japanese Utility Model Laid-Open No. 2-988867, it is necessary to provide the washer 22 and the cap 25 with the tapered portion 26 and the tapered pressure contact surface 27. Particularly, there is a problem that a more complicated die is required to form the taper-shaped press-contact surface 27 of the cap 25, which protrudes in the die-cutting direction, and the cost is high. In addition, when the cap is attached to the washer with the latter adhesive, there is a problem that the number of steps is increased because it is necessary to attach the adhesive to the cap in addition to assembling the parts in the scissor manufacturing process.

Therefore, an object of the present invention is to provide scissors having a structure of a pivoting center part that is easy to assemble, easy to assemble, and low in cost.

[0005]

[Means for Solving the Problems]

 In order to solve the above-mentioned problems, the present invention supports a pair of scissors so as to be openable and closable by a rotation center shaft, and both ends of the rotation center shaft are superposed on the outer surfaces of both scissors pieces through a cap mounting member or the like. In the scissors in which both scissor pieces are sandwiched and the rotation center portion formed by both ends of the rotation center shaft and the cap attachment member is capped by the cap, the outer peripheral side surface of the cap attachment member or the above The gist of the present invention is to provide a projection on at least one of the inner side surfaces of the opening of the cap, and to press the side surface facing the projection when the cap is crowned to lock the cap.

[0006]

[Action]

 In the present invention thus configured, when the caps are respectively fitted onto the cap mounting members at the center of rotation, the inner surface of the opening of the cap is pressed by the protrusion provided between the cap mounting member and the outer peripheral surface of the cap mounting member. To be done. Then, in the attached state, the inner surface of the opening of the cap is pressed and locked by the protrusion provided between the inner surface of the opening of the cap and the outer peripheral surface of the cap mounting member.

[0007]

【Example】

 Hereinafter, a structure of a rotation center portion of scissors according to an embodiment of the present invention 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 FIG. 1, the rotation center portion A of the scissors includes a pair of scissors pieces 1, a cap mounting member 2 superposed on the outer surfaces of the scissors pieces 1, a rivet 3 as a rotation center axis, and washers 4a and 4b. It is composed of a pair of caps 5 capped on them.

A pair of ring-shaped cap attachment members 2 made of synthetic resin are superposed on the outer surfaces of the scissors pieces 1. Insertion holes 9a and 9b are formed in the center of the cap mounting member 2 via a step portion 2a. The rivets 3 are inserted into the scissors pieces 1 through the insertion holes 9a and 9b of the cap attachment member 2 and are caulked. A step portion 2a of the cap attachment member 2 and a ring-shaped washer 4b are sandwiched between one outer surface of the scissor piece 1 and one end 3b of the rivet 3. On the other hand, between the other outer surface of the scissor piece 1 and the other end 3a of the rivet 3, a step portion 2a of the cap mounting member 2 and a ring-shaped washer 4a are sandwiched.

As shown in FIG. 3, projections 6 are provided on the outer peripheral side surface 8 of the cap mounting member 2 at intervals of approximately 90 degrees with the rivet 3 as the center. Further, as shown in FIG. 1, the front end of the protrusion 6 is provided in a substantially R shape.

The outer surface of the cap 5 made of synthetic resin is provided in an R shape. On the other hand, the inner top portion of the cap 5 is provided in a concave shape. The inner surface 7 of the opening is formed in a circular cross section. The cap 5 is fitted onto the cap mounting member 2. That is, the cap 5 is attached to the projection 6 of the cap mounting member 2 in a pressure contact state.

Next, the operation of the present invention configured as described above will be described. The pair of caps 5 are fitted onto the pair of cap mounting members 2, respectively. At the time of external fitting, the projection 6 formed integrally with the cap mounting member 2 presses the opening inner side surface 7 of the cap 5. The cap 5 is completely covered while resisting this pressing force. In this state, the cap 5 is pressed and locked by the projection 6 of the cap mounting member 2.

Therefore, in this embodiment, by using the cap mounting member 2 and the cap 5 having a shape that can be easily die-cut molded, the mold for molding these parts can be simplified. As a result, the component manufacturing cost can be reduced. In addition, the washer 4 can use a standard one, which can reduce the cost of parts. Further, also in the step of attaching the cap 5, since the top of the protrusion 6 is provided in an R shape, it is easy to insert it at first, and thereafter, a simple work of inserting it against the pressing of the protrusion 6 is sufficient. In addition, the outer surface of the cap 5 is formed in an R shape and has no concave and convex portions that are easily caught, so that it does not easily come off.

The present invention is not limited to the above-mentioned embodiment, and the protrusion 6 may be provided on the opening inner side surface 7 of the cap 5, for example. Further, it may be provided on both sides of the inner side surface 7 of the opening of the cap 5 and the outer side surface 8 of the cap mounting member 2. Further, any changes may be made without departing from the spirit of the invention.

[0015]

[Effect of device]

 As described above in detail, according to the present invention, it is possible to provide scissors having a structure of a rotation center portion in which the manufacturing of each component is simple, the cost is low, and the assembly is easy.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a structure of a rotation center portion of scissors according to the present invention.

FIG. 2 is likewise a plan view of scissors.

FIG. 3 is a sectional view taken along line XX of FIG.

FIG. 4 is a cross-sectional view showing a structure of a rotation center portion of conventional scissors.

[Explanation of symbols]

1 ... Scissors piece, 2 ... Cap mounting member, 3 ... Rivet, 3a
... the other end of the rivet, 3b ... one end of the rivet, 4a, 4b
... washers, 5 ... caps, 6 ... projections, 7 ... cap opening inner side surfaces, 8 ... cap mounting member outer peripheral side surfaces, A ... rotation center part.

Claims (1)

[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 both ends (3a, 3b) of the rotation center shaft (3) are provided on the outer surfaces of both scissors pieces (1). ) Is the cap mounting member (2)
A pair of scissors pieces (1) are sandwiched by being superposed on each other, and both ends (3a, 3b) of the center axis of rotation (3), a cap attaching member (2), and the like, a center of rotation (A). ) Is capped with a cap (5), the protrusion (6) is provided on at least one of the outer peripheral side surface (8) of the cap mounting member (2) or the opening inner side surface (7) of the cap (5). With a cap (5)
A structure of a center of rotation of scissors, characterized in that the cap (5) is provided so as to press the opposing side surfaces of the protrusions (6) when crowned.