JP5363759B2 - scissors - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improving the sharpness of cutting of scissors, and to make the scissors more convenient by an intermediate blade body 8 stably held between main blade bodies 4 and 5 without shaking and by a so-called draw-cutting function. <P>SOLUTION: Both main blade bodies 4 and 5 are supported rotatably in the opening/closing directions X of the main blade bodies 4 and 5 by a center axis 9 in a rotary supporting part 3, and an eccentric axis part 11 disposed in one main blade body 4 and an eccentric axis part disposed in the other main blade body 5 are disposed at eccentric positions relative to the center axis part 9. The intermediate blade body 8 has a guide hole to be relatively moved to the center axis part 9, a guide hole to be relatively moved to the eccentric axis part 11 of the one main blade body 4 and a guide hole to be relatively moved to the eccentric axis part of the other main blade body 5 when the main blade bodies 4 and 5 are opened/closed. The intermediate blade body 8 can be stopped and retained at the middle position of an opening angle &theta; between the main blade bodies 4 and 5 when the main blade bodies 4 and 5 are opened/closed by the center axis part 9 and the respective eccentric axis parts and guide holes, and the intermediate blade body 8 can reciprocate in the longitudinal direction of the intermediate blade body 8 relative to the main blade bodies 4 and 5. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to a scissors in which an intermediate blade is provided between the main blades of a pair of scissors pieces that are supported by a rotation support portion so as to be capable of opening and closing each other.

  Conventionally, when opening a storage bag with a seal chuck attached to the mouth, if the mouth is cut with a general bag having only a pair of flanges, the mouth of the storage bag 16 as shown in FIG. Since both the cutting edges 17a and 17b formed in the portion 17 are aligned with each other near the outside of the seal chuck 18, there is a problem that it is difficult to spread both the cutting edges 17a and 17b of the mouth portion 17 with fingers.

In the following patent document 1 and the following patent document 2, it is a scissors mainly used for the purpose of cutting the shells of crustaceans. Discloses a scissors provided with an intermediate blade body. When the mouth of the containing bag is cut and opened by the hook, if the two main blades are closed with the intermediate blade inserted in the mouth near the outside of the seal chuck, The cutting edge formed at the mouth by the blade body and the cutting edge formed at the mouth by the other main blade body and the intermediate blade body are displaced from each other near the outside of the seal chuck. It becomes easy to spread the cutting edge with a finger.
JP 2002-58884 A JP 2000-185182 A

However, in this type of scissors, there is a possibility that the intermediate blade body may swing greatly in the opening / closing movement direction with respect to both main blade bodies during use.
Therefore, in the scissors disclosed in Patent Document 1, the user can set the center position of the intermediate blade body by bringing the intermediate blade body into contact with the adjustment member provided on one of the main blade bodies. However, unless the intermediate blade is always held, the intermediate blade may be shaken.

  In the scissors disclosed in Patent Document 2, a center position adjusting member such as a chain or a spring is connected between the intermediate blade body and the two main blade bodies. However, in the chain, the intermediate blade cannot be stopped between the two main blades unless the two main blades are in the fully open state, and the intermediate blade can swing until the two main blades are in the fully open state. There is a fear. In addition, in the spring, the intermediate blade can be stopped between the two main blades by the balance of the elastic force of the spring regardless of the opening angle of the two main blades, but when the user touches the intermediate blade, There is a possibility that the intermediate blade may swing against the elastic force of the spring. Furthermore, when a chain or a spring is connected to both main blades, the most open movement angle of both main blades is limited.

  Therefore, in any case, the problem that the intermediate blade may swing in the opening / closing movement direction with respect to both the main blades during use cannot be solved. Therefore, for example, as described above, when the mouth portion of the accommodation bag is cut and opened with the scissors, the convenience of the scissors is deteriorated.

The object of the present invention is to improve the usability of this type of bag .

In the drawings (first embodiment shown in FIGS. 1 to 4, second embodiment shown in FIGS. 5 to 7) of the embodiments described later, the present invention will be described with reference to the reference numerals of the first embodiment .
Scissors according to the invention of claim 1, which corresponds to the first embodiment has the configuration described below.

  In this scissors, a pair of scissors pieces 1 and 2 supported so as to be capable of opening and closing with each other by the rotation support portion 3 are provided with main blade bodies 4 and 5 on the front end side with respect to the rotation support portion 3, and their main blades. An intermediate blade 8 is provided between the bodies 4 and 5. In the rotation support portion 3, both the main blade bodies 4, 5 can be rotated along the opening / closing movement direction X of the main blade bodies 4, 5 by the central shaft portion 9 having the same rotation center 9 a, for example. The guide restricting portion 11 provided on one of the main blade bodies 4 and the guide restricting portion 12 provided on the other main blade body 5 is eccentric with respect to the central shaft portion 9. The guide restricting portion 15 disposed relative to the central shaft portion 9 and the guide restricting portion 11 of the one main blade body 4 when the main blade bodies 4 and 5 of the two flange pieces 1 and 2 are opened and closed. The intermediate blade 8 is provided with a guide restricting portion 13 that moves relative to the guide restricting portion 14 that moves relative to the guide restricting portion 12 of the other main blade 5.

In addition, the central shaft 9 and the guide portion 14, 15 of this, the intermediate blade 8 during opening and closing movement of both the main cutting edge 4, 5 of their main blade body 4,5 It can be stopped and held at an intermediate position of the opening angle θ between them, and can be reciprocated in the direction along the longitudinal direction of the intermediate blade body 8 with respect to the main blade bodies 4 and 5. In this case, the intermediate position between the two main blade bodies 4 and 5 means that one main blade body 4 is opened from the closed state when the main blade bodies 4 and 5 of the two scissors pieces 1 and 2 are opened and closed. This means that the opening angle α formed with respect to 8 and the opening angle β formed with respect to the intermediate blade body 8 when the other main blade body 5 is opened from the closed state are substantially the same. It is preferable to make β equal.

Further, one of the guide restricting portions of the main blade bodies 4 and 5 and the guide restricting portion of the intermediate blade body 8 is the eccentric shaft portions 11 and 12, and the other is the eccentric shaft portions 11 and 12 and the center. The guide holes 13, 14, and 15 are engaged with the shaft portion 9 so as to be relatively movable. For example, the guide restricting portions of the main blades 4 and 5 are eccentric shaft portions 11 and 12, and the guide restricting portions of the intermediate blade 8 are guide holes 13, 14 and 15. The guide holes 13, 14, 15 include not only through holes but also grooves. Further, a guide hole 13 in which the eccentric shaft portion 11 of one main blade body 4 is engaged in a relatively movable manner and a guide hole 14 in which the eccentric shaft portion 12 of the other main blade body 5 is engaged in a relatively movable manner. And the guide hole 15 in which the central shaft portion 9 is engaged so as to be relatively movable, the guide holes 13, 14, 15 of the intermediate blade body 8 can be formed with a simple configuration. . Incidentally, even if there is rattling due to slight play between the eccentric shaft portions 11, 12 and the central shaft portion 9 and the guide holes 13, 14, 15 at the intermediate position between the main blade bodies 4, 5. In that case, the intermediate blade 8 is slightly shaken.

The invention of claim 1 has the following effects.
(A) Since the intermediate blade body 8 is stably held between the main blade bodies 4 and 5 when the both main blade bodies 4 and 5 are opened and closed, for example, a storage bag having a seal chuck 18 at the mouth portion 17. When the mouth portion 17 is cut to open 16, the intermediate blade body 8 can be easily inserted into the mouth portion 17 near the outside of the seal chuck 18, and the usability of the scissors can be improved.

(B) An intermediate position of the opening angle θ formed between the main blade bodies 4 and 5 when the intermediate blade body 8 opens and closes the main blade bodies 4 and 5, for example, the same opening angle with respect to the main blade bodies 4 and 5. Since it hold | maintains in the position which makes (alpha) and (beta), it can make it easier to insert the intermediate blade body 8 in the opening | mouth part 17, and can improve the usability of a scissors.

(C) Since the intermediate blade body 8 can reciprocate in the direction along the longitudinal direction of the intermediate blade body 8 with respect to both the main blade bodies 4 and 5 when the both main blade bodies 4 and 5 are opened and closed, the so-called cutting function is used. The sharpness is improved and the convenience of the cocoon can be improved.

(D) One of the guide restricting portions of the main blades 4 and 5 and the guide restricting portion of the intermediate blade 8 is the eccentric shaft portions 11 and 12, and the other is the eccentric shaft portions 11 and 12 and the central shaft. Since the portion 9 is the guide holes 13, 14, 15 that are engaged with each other so as to be relatively movable, the guide restricting portions of the main blade bodies 4, 5 and the guide restricting portions of the intermediate blade body 8 are formed with a simple configuration. Can do.

Also not a will be described with reference to FIGS. 1-4 for scissors according to the first embodiment.
As shown in FIG. 1, a pair of flange pieces 1 and 2 supported so as to be able to open and close with each other by a rotation support portion 3 are provided with main blades 4 and 5 on the tip side of the rotation support portion 3. In addition, a handle 6, 7 is provided on the base end side of the rotation support portion 3, and an intermediate blade 8 is provided between the main blades 4, 5.

  As shown in FIGS. 2, 3, and 4, in this rotation support portion 3, one scissors piece 1 composed of one main blade body 4 and one handle 6, the other main blade body 5, and the other The other flange piece 2 composed of the handle 7 is supported by the central shaft portion 9 having the same rotation center 9 a so as to be rotatable along the opening / closing movement direction X, and is formed on the intermediate blade body 8. The central shaft portion 9 is inserted into the T-shaped through-hole 10, and the eccentric shaft portion 11 serving as a guide restricting portion disposed at an eccentric position with respect to the central shaft portion 9 with one main blade body 4 and the other. An eccentric shaft portion 12 serving as a guide restricting portion disposed at an eccentric position with respect to the central shaft portion 9 by the main blade body 5 is engaged with the through hole 10. In the T-shaped through hole 10, a guide hole 13 as a guide restricting portion in which an eccentric shaft portion 11 of one main blade body 4 is engaged so as to be relatively movable, and an eccentric shaft portion 12 of the other main blade body 5. And guide holes 14 as guide restricting portions that are engaged with each other so as to be relatively movable, extend in a straight line, and are continuous with each other on the side of the common end portions 13a and 14a. A guide hole 15 serving as a guide restricting portion in which the central shaft portion 9 is engaged so as to be relatively movable is continuously connected to the common end portion 15a with respect to the common end portions 13a and 14a. It extends straight from 15a at a right angle.

  As shown in FIGS. 1A and 2, in the most closed state of the scissors, the intermediate blade 8 is overlapped with one main blade 4 and the other main blade 5 between the two main blades 4, 5. The central shaft portion 9 between the main blade bodies 4 and 5 is located at the common end portion 15 a of the guide hole 15, and the eccentric shaft portion 11 of one main blade body 4 is opposite to the common end portion 13 a of the guide hole 13. The eccentric shaft portion 12 of the other main blade body 5 is located at the outer end portion 14b that is opposite to the common end portion 14a of the guide hole 14.

  As shown in FIGS. 1 (b) and 3, in the midway state where the heel is opened from the most closed state, the eccentric shaft portion 11 of one main blade body 4 rotates around the rotation center 9 a of the central shaft portion 9. While the relative movement from the outer end 13b of the guide hole 13 toward the common end 13a side, the eccentric shaft portion 12 of the other main blade body 5 rotates around the rotation center 9a of the central shaft portion 9, and the guide hole 14 Relative movement from the outer end portion 14b to the common end portion 14a side, and the central shaft portion 9 between the main blades 4, 5 is rotated by the eccentric shaft portions 11 and 12, and the common end portion 15a of the guide hole 15 is rotated. From the common end portion 15a to the outer end portion 15b side. At that time, the two blade edges 8a of the intermediate blade body 8 move in the direction along the longitudinal direction with respect to the blade edges 4a, 5a of the two main blade bodies 4, 5.

  As shown in FIGS. 1C and 4, in the most open state of the scissors, the central shaft portion 9 between the main blades 4, 5 moves relatively from the common end portion 15 a of the guide hole 15 and the outer end portion 15 b. The eccentric shaft portion 11 of one main blade body 4 is located near the common end portion 13a from the outer end portion 13b of the guide hole 13 and the eccentric shaft portion of the other main blade body 5 12 approaches the common end portion 14a from the outer end portion 14b of the guide hole 14 and is positioned in the vicinity thereof.

  Further, in the middle of closing the rod from the fully open state, the eccentric shaft portion 11 of one main blade body 4 rotates around the rotation center 9 a of the central shaft portion 9, and the common end portion 13 a side of the guide hole 13. And the eccentric shaft portion 12 of the other main blade body 5 rotates around the rotation center 9a of the central shaft portion 9 to move from the common end portion 14a side of the guide hole 14 to the outer end. The central shaft portion 9 between the main blade bodies 4 and 5 moves relative to the portion 14b side, and the eccentric shaft portions 11 and 12 turn to move toward the common end portion 15a side from the outer end portion 15b of the guide hole 15. Move relative. At that time, the two blade edges 8a of the intermediate blade body 8 move in the direction along the longitudinal direction with respect to the blade edges 4a, 5a of the two main blade bodies 4, 5.

  In the above-described intermediate opening / closing state or the most open state of the rod, the intermediate blade 8 stops at an intermediate position of the opening angle θ formed between the main blades 4 and 5 when the main blades 4 and 5 are opened and closed. And the opening angle α that the one main blade body 4 opens from the closed state to the intermediate blade body 8 and the opening angle that the other main blade body 5 opens from the closed state to the intermediate blade body 8. β are identical to each other.

  As shown in FIGS. 7B and 8A and 8B, when the accommodation bag 16 having the seal chuck 18 attached to the mouth portion 17 is opened, an intermediate portion in the mouth portion 17 near the outside of the seal chuck 18 is provided. When the main blade bodies 4 and 5 are closed with the blade body 8 inserted, the cutting edge 17a formed in the mouth portion 17 by the one main blade body 4 and the intermediate blade body 8 and the other main blade body 5 and the cutting edge 17b formed in the mouth portion 17 by the intermediate blade body 8 are displaced from each other in the vicinity of the outside of the seal chuck 18, so that both the cutting edges 17a and 17b of the mouth portion 17 can be easily spread with fingers.

In the following, it will be described with reference to FIGS. 5-7 for scissors according to the second embodiment focusing on the differences from the first embodiment. 6 and 7 in the second embodiment correspond to FIGS. 2 and 4 in the first embodiment, respectively.

  As shown in FIG. 5A, one main blade body 4 is provided with a central shaft portion 19 and an eccentric shaft portion 20 as a guide restricting portion disposed at an eccentric position with respect to the central shaft portion 19. Yes. As shown in FIG. 5C, the other main blade 5 is provided with a central shaft portion 21 and an eccentric shaft portion 22 as a guide restricting portion disposed at an eccentric position with respect to the central shaft portion 21. Yes. As shown in FIG. 5B, the intermediate blade 8 is supported by the center hole 23 in which the central shaft portion 19 of one main blade body 4 is supported and the central shaft portion 21 of the other main blade body 5. The center hole 24 is formed, the guide hole 25 as a guide restricting portion into which the eccentric shaft portion 20 of the one main blade body 4 is engaged, and the eccentric shaft portion 22 of the other main blade body 5. A guide hole 26 serving as a guide restricting portion in which the slidable is engaged is formed continuously at the common end portions 25a and 26a. As shown in FIG. 6, in the most closed state of the scissors, the intermediate blade 8 overlaps between the main blade 4 and the other main blade 5 between the main blades 4, 5, and the main blade 4 The eccentric shaft portion 20 is positioned on the common end portion 25 a side of the guide hole 25, and the eccentric shaft portion 22 of the other main blade body 5 is positioned on the common end portion 26 a side of the guide hole 26. As shown in FIG. 7, in the most open state of the ridge, the eccentric shaft portion 20 of one of the main blades 4 is relatively moved from the common end portion 25a side of the guide hole 25 and is opposite to the common end portion 25a. The outer end portion 26b is located on the outer end portion 25b and the eccentric shaft portion 22 of the other main blade body 5 relatively moves from the common end portion 26a side of the guide hole 26 and becomes opposite to the common end portion 26a. Located in. Although not shown, the central shaft portion 19 of one main blade body 4 is supported so as to be relatively movable with respect to the other main blade body 5, and the central shaft portion 21 of the other main blade body 5 is supported by one main blade body. 4 is supported so as to be relatively movable. In the second embodiment, similarly to the first embodiment, the intermediate blade 8 can be stopped and held at an intermediate position between the main blades 4 and 5 when the main blades 4 and 5 are opened and closed. it can.

This embodiment has the following effects.
* In the rotation support portion 3 of the first embodiment, the movement of the intermediate blade body 8 is restricted by the central shaft portion 9, the eccentric shaft portions 11, 12, and the guide holes 13, 14, 15, and the rotation of the second embodiment. In the support portion 3, the movement of the intermediate blade body 8 is restricted by the central shaft portions 19, 21, the eccentric shaft portions 20, 22 and the guide holes 25, 26, so that the intermediate blade body 8 has the two main blade bodies 4, 5. During the opening and closing movement, the main blades 4 and 5 are stably held without shaking. Therefore, for example, when cutting the mouth portion 17 of the storage bag 16 with the seal chuck 18, the intermediate blade body 8 can be easily inserted into the mouth portion 17 near the outside of the seal chuck 18, thereby improving the usability of the scissors. can do.

  * In the rotation support part 3 of the first and second embodiments, the movement of the intermediate blade body 8 is restricted as described above, so that the intermediate blade body 8 is moved when the main blade bodies 4 and 5 are opened and closed. It is held at an intermediate position of the opening angle θ formed between the main blades 4 and 5. Therefore, the intermediate blade body 8 can be more easily inserted into the mouth portion 17, and the usability of the scissors can be improved.

  * In the rotation support portion 3 of the first embodiment, the movement of the intermediate blade body 8 is restricted as described above, so that the main blade body 4 is moved when the intermediate blade body 8 opens and closes the main blade bodies 4 and 5. , 5 can reciprocate in the direction along the longitudinal direction of the intermediate blade 8. Therefore, the sharpness is improved by the so-called pulling function, and the convenience of the bag can be improved.

For example, the following embodiment may be configured as follows.
In the rotation support portion 3 of the first embodiment, the outer shape of the assembly of the three guide holes 13, 14, 15 formed continuously with the intermediate blade body 8 is T-shaped. The outer shape can be appropriately changed to a radial shape with an interval of 120 degrees.

  In the rotation support portion 3 of the first embodiment, an assembly of three guide holes 13, 14, 15 formed continuously from each other by the intermediate blade body 8 is used. They may be separated or separated into one guide hole and an assembly of two guide holes.

  In the rotation support portion 3 of the first embodiment, the eccentric shaft portions 11 and 12 are provided as the guide restricting portions of the main blades 4 and 5, and the guide holes 13 and 14 are provided as the guide restricting portions of the intermediate blade 8. However, conversely, a guide hole may be provided as a guide restricting portion for both the main blade bodies 4, 5 and an eccentric shaft portion may be provided as a guide restricting portion for the intermediate blade body 8.

  In the rotation support portion 3 of the second embodiment, the eccentric shaft portion 20 of one main blade body 4, the guide hole 25 of the intermediate blade body 8 into which the eccentric shaft portion 20 is engaged, and the other main blade body 4. The eccentric shaft portion 22 of the blade body 5 and the guide hole 26 of the intermediate blade body 8 into which the eccentric shaft portion 22 is engaged are omitted, and the central shaft portion 19 of one main blade body 4 and the other main blade portion 4 are omitted. Only with the central shaft portion 21 of the blade body 5, the intermediate blade body 8 can be stopped and held at an intermediate position between the main blade bodies 4, 5 when the main blade bodies 4, 5 are opened and closed. it can.

  In the rotation support portion 3 of the second embodiment, in addition to the pair of central shaft portions 19 and 21, the intermediate blade body 8 includes an eccentric shaft portion that is inserted into the guide hole of the one main blade body 4. You may provide the eccentric shaft part engaged in the guide hole of the other main blade body 5 as one axis | shaft on the same centerline.

(A) is a front view which shows the most closed state of the scissors concerning 1st Embodiment, (b) is a front view which similarly shows the opening-and-closing middle state of the scissors, (c) is also the most open state of a scissors FIG. (A) is the partial expansion front view which shows the rotation support part of Fig.1 (a), (b) is the partial expansion rear view which shows the rotation support part of Fig.1 (a), (c) is It is the elements on larger scale which looked at the rotation support part from the front side. (A) is a partial enlarged front view showing the rotation support part of FIG. 1 (b), (b) is a partial enlarged rear view showing the rotation support part of FIG. 1 (b), and (c). It is the elements on larger scale which looked at the rotation support part from the front side. (A) is a partial enlarged front view showing the rotation support part of FIG. 1 (c), (b) is a partial enlarged rear view showing the rotation support part of FIG. 1 (c), (c) It is the elements on larger scale which looked at the rotation support part from the front side. (A) is a partial enlarged front view which shows the rotation support part of one main blade body in the scissors concerning 2nd Embodiment, (b) is the partial enlarged front view which similarly shows the rotation support part of an intermediate blade body. (C) is a partially enlarged front view showing the rotation support portion of the other main blade body. (A) is a partial enlarged front view which shows a rotation support part in the most closed state of the scissors concerning 2nd Embodiment, (b) is a partial enlarged rear view which similarly shows a rotation support part, (c) FIG. 4 is a partially enlarged cross-sectional view of the rotation support portion as seen from the front side. (A) is a partial expanded front view which shows a rotation support part in the fully open state of the collar concerning 2nd Embodiment, (b) is a partial expansion rear view which similarly shows a rotation support part, (c) FIG. 4 is a partially enlarged cross-sectional view of the rotation support portion as seen from the front side. (A) is the side view which shows the state which inserted the intermediate blade body in the opening part shown by the dashed-two dotted line of FIG.1 (b) when cut | disconnecting and opening the opening part of a storage bag, (b) is ( It is the sectional view on the AA line of a), (c) is a sectional view which cut the mouth part of an accommodation bag from the state of (b), (d) is the mouth part cut with the scissors of this embodiment. It is sectional drawing shown, (e) is sectional drawing which shows the opening | mouth part cut | disconnected with the conventional scissors.

Explanation of symbols

  1, 2 ... scissors, 3 ... rotation support part, 4, 5 ... main blade body, 8 ... intermediate blade body, 9, 19, 21 ... central shaft part, 11, 12, 20, 22 ... as guide restriction part Eccentric shaft portions, 13, 14, 15, 25, 26 ... guide holes as guide restricting portions, X ... opening / closing movement direction of both main blades, θ ... opening angle.

Claims (1)

A pair of scissors pieces supported so as to be able to open and close with each other at the rotation support part is provided with a main blade body on the tip side of the rotation support part, and a scissors with an intermediate blade body provided between the main blade bodies,
In the rotation support portion, the main blade bodies are supported by the central shaft portion so as to be rotatable along the opening / closing movement direction, and the guide restricting portion provided on one of the main blade bodies and the other The guide restricting portion provided on the main blade body is arranged in an eccentric position with respect to the central shaft portion, and the guide restricting portion that moves relative to the central shaft portion when the main blade body of both the flanges is opened and closed A guide restricting portion that moves relative to the guide restricting portion of the main blade and a guide restricting portion that moves relative to the guide restricting portion of the other main blade are provided in the intermediate blade, and the central shaft portion and each guide are provided. The restricting portion allows the intermediate blade to be stopped and held at an intermediate position of the opening angle formed between the main blades when the two main blades are opened and closed, and the length of the intermediate blade relative to the two main blades. Reciprocating in the direction along the direction ,
One of the guide regulating portion of the main blade body and the guide regulating portion of the intermediate blade body is an eccentric shaft portion, and the other is a guide in which the eccentric shaft portion and the central shaft portion are engaged so as to be relatively movable. A spear characterized by being a hole .

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