JP2021142986A - Cap opener - Google Patents

Abstract

To provide a cap opener that is compact, has a safe structure, is easy to grip regardless of left-handedness or right-handedness, and allows easy opening.SOLUTION: The cap opener comprises: a first gripping part 1a having a first contact face 11a contacting one side of a cap; and a second gripping part 1b having a second contact face 11b contacting an opposite side of the one side of the cap. The first gripping part and the second gripping part are integrated at a base end part 19 such that the first contact face and the second contact face form a V-shape. An opposing cap side of the first contact face of the first gripping part has a first arc-shaped periphery 12a, and the opposing cap side of the second contact face of the second gripping part has a second arc-shaped periphery 12b.SELECTED DRAWING: Figure 3

Description

The present invention relates to a cap opener used for opening a cap of a PET bottle, a pull tab or a stayion tab of a beverage can, a cap of a pouch with a spout, and the like.

Utility model registration No. 3171347 is a cap opener for narrow-mouthed bottles that extends from the circular cap holding part 2 in two directions and has a flat-shaped pull tab raising and pull top opening lid at one end of the rod-shaped handle. Is disclosed. According to this cap opener, regardless of the size of the cap, it is easy to insert the cap into the holding part 2, and even a person with weak force can open the cap by squeezing the handle part 1 and turning it counterclockwise. Can be done.

Practical new proposal registration No. 3211176 includes a main body in which an arc-shaped portion that opens in a C shape and a handle portion that extends continuously from both ends of the arc-shaped portion in a C-shape are integrated, and grips the outer surface of the handle portion. An instrument used to loosen the screw cap by sandwiching the outer peripheral surface of the screw cap between the inner side surfaces of the arc-shaped portion and rotating the handle portion in a predetermined direction. A core material having a box frame-like structure made of synthetic resin having an open back surface having a front surface portion extending from both ends of the C-shape in a C shape and a side wall portion extending from the peripheral edge of the front surface portion to the back surface side. A cap opener including a silicone resin skin material provided on the front surface portion and the surface of the side wall portion of the core material so as to connect the outer side wall portions and the inner side wall portions of the core material is disclosed. According to this cap opener, it is easy to hold by hand and does not slip when opened.

Practical new proposal registration No. 3212117 is a can opener that forms an opening on the upper surface of the can by erecting a stayion tab attached to the upper surface of the can with a rivet, and engages with the stayion tab. The engaging member includes an engaging member and a gripping member attached to the engaging member, and the left end portion and the right end portion of the engaging member are bent so as to form a gap into which the stayion tab enters. The thin plate is formed by using the thin plate, the rear end portion of the thin plate is attached to the gripping member, and a recess having a shape such that the rivet is fitted in the central position of the front end portion of the thin plate. Discloses a can opener characterized by the formation of a can opener. According to this can opener, anyone can easily open the can with a simple structure.

Utility model registration No. 3171347 Utility model registration No. 3211176 Utility model registration No. 3212117

However, according to the cap opener of Utility Model Registration No. 3171347, the grip portion is rod-shaped and the tip is flat and pointed, which may cause injury during use and is inconvenient to store. .. According to the cap opener of Utility Model Registration No. 3211176, it is composed of an arc-shaped portion that sandwiches the cap and a handle portion of the grip portion, which increases the overall shape and takes up storage space. The utility model registration No. 3212117 can opener is exclusively for raising pull tabs, and the cap cannot be opened. Further, the engaging member into which the stayion tab is inserted is formed by bending a thin metal plate, and cannot be said to have a simple structure.

Therefore, an object of the present invention is to provide a caps opener that is compact, has a safe structure, is easy to grip and is easy to open regardless of whether it is right-handed or left-handed.

That is, the present invention solves the above-mentioned conventional problems.
A first holding portion having a first contact surface that contacts one side of the cap,
It has a second holding portion having a second contact surface that contacts the opposite side of one side of the cap.
The first holding portion and the second holding portion are integrated at a base end portion so that the first contact surface and the second contact surface form a V shape.
The anti-cap side of the first contact surface of the first holding portion has an arc-shaped first outer peripheral portion.
The anti-cap side of the second contact surface of the second holding portion provides a caps opener having an arc-shaped second outer peripheral portion.

Further, in the present invention, the first contact surface and the second contact surface have a length in the longitudinal direction (X direction) extending from the base end portion in one direction and a direction intersecting the longitudinal direction (Y direction), respectively. The cap has a top plate that has a width of 2 and is passed between one end of the first contact surface and the second contact surface in the Y direction, and the cap is the back surface of the top plate. The caps opener is provided, which is sandwiched so as to hit the first contact surface and the three surfaces of the second contact surface, and is turned in the opening direction to open the cap.

The present invention also provides the caps opener, wherein the top plate is attached from the outer peripheral end of the first outer peripheral portion to the outer peripheral end of the second outer peripheral portion.

Further, the present invention is characterized in that the tip portion of the top plate on the opposite base end side is for pull tab raising or stayion tab raising, and has an arc shape in the thickness direction of the top plate. The caps opener is provided.

Further, the present invention provides the caps opener characterized in that the cross-sectional shape of the tip end portion of the top plate on the anti-base end portion side is a tapered convex shape.

Further, the present invention provides the caps opener characterized in that a concave groove is formed in the thickness direction on the back surface of the tip portion.

Further, the present invention provides the caps opener characterized in that the concave groove has a crescent shape along the tip shape when viewed in the thickness direction.

The present invention also provides the caps opener, characterized in that at least one of the first contact surface and the second contact surface is formed of a friction material.

The present invention also provides the caps opener, wherein the friction material is an elastomer.

The present invention also provides the caps opener, wherein the friction material is integrally molded with the first sandwiching portion or the second sandwiching portion by two-color molding.

The present invention also provides the caps opener described above, which further comprises a flexible ring extending in the anti-X direction, one end of which is fixed to the base end portion.

Further, in the present invention, the flexible ring is composed of a pair of substantially straight portions facing each other extending gradually expanding in the anti-X direction from the base end portion and an arc portion connecting the tips of the substantially straight portions. The caps opener is provided.

The present invention also provides the caps opener, characterized in that all or part of the inner peripheral surface of the flexible ring is formed with irregularities that enhance the bite to the cap. be.

Further, the present invention is characterized in that the maximum diameter inside the arc portion of the flexible ring is substantially the same as or smaller than the minimum gap between the first sandwiching portion and the second sandwiching portion. The caps opener is provided.

The present invention also provides the caps opener, wherein the flexible ring is made of silicone rubber.

According to the present invention, it has a compact and safe structure, and is easy to grip and open regardless of whether it is right-handed or left-handed.

It is a perspective view of the caps opener in embodiment of this invention. It is a perspective view seen from the other direction of the caps opener of FIG. It is a bottom view seen from the cap side (back side) of the caps opener of FIG. It is a perspective view in the process of disassembling the caps opener of FIG. It is a top view of the caps opener of FIG. 1 as seen from the top plate side. It is a side view of the caps opener of FIG. It is a figure seen along the X-ray line of FIG. It is a figure seen along the YY line of FIG. It is a back view of a part of the tip of the top plate enlarged. Is a view taken along the _Z 1 -Z ₁ line in FIG. Is a view taken along the _Z 2 -Z ₂ line in FIG. It is a figure seen along the Z _3- Z _{3 line of FIG.} It is a figure explaining the method of opening a cap. It is another figure explaining the method of opening a cap. It is a figure explaining the method of opening a stayion tab. It is a figure explaining the method of opening the cap of the pouch with a spout. It is a figure explaining another method of opening the cap of a pouch with a spout.

Next, the caps opener (hereinafter, simply referred to as “opener”) according to the embodiment of the present invention will be described with reference to FIGS. 1 to 17. The opener 10 is used for opening a screw cap of a PET bottle, a pull tab or a stayion tab of a beverage can (hereinafter, simply referred to as "pull tab"), a small-diameter screw cap of a pouch with a spout, and the like.

The opener 10 has a first holding portion 1a having a first contact surface 11a that contacts one side of the cap, and a second contact surface 11b that contacts the opposite side (the other side) in the radial direction of one side of the cap. The first sandwiching portion 1a and the second sandwiching portion 1b have a second sandwiching portion 1b having a base end portion 19 so that the first contact surface 11a and the second contact surface 11b form a V shape. The first outer peripheral portion 12a of the first sandwiching portion 1a in the radial direction of the first contact surface 11a has an arcuate first outer peripheral portion 12a, and the second contact surface 11b of the second sandwiching portion 1b. The anti-cap side in the radial direction of the above has an arc-shaped second outer peripheral portion 12b.

The cap is set between the first contact surface 11a and the second contact surface 11b. Since the first contact surface 11a and the second contact surface 11b are V-shaped, it is possible to open a cap 50 having _{a large diameter (m 1} ) to a cap 50 having a small diameter (m _2). Since the V-shaped base end (corner portion) has a shape cut in the middle, a cap having a cap diameter of (m ₂ ) or less may be opened by the flexible ring 2.

The opener 10 has an oval shape when viewed in a direction intersecting the diameter of the cap 50. _{That is, the opener 10 has an elliptical shape in a plan view, and is smaller than the thickness (t 1} ) (thickness (t)) in the V-shape so that the V-shaped opening is in the longitudinal direction in the medium substance of the thickness (t). ) It is a cutout of minutes. Therefore, the thickness of the top plate 13 between the first sandwiching portion 1a and the second sandwiching portion 1b is ((t) − (t ₁ )). In this example, the top plate 13 extends from the outer peripheral end of the first holding portion 1a to the outer peripheral end of the second holding portion 1b, but the top plate 13 is not limited to this, and the top plate 13 has at least the first contact. Anything that closes the gap between the surface 11a and the second contact surface 11b may be used.

The first sandwiching portion 1a and the second sandwiching portion 1b have substantially symmetrical shapes, and the first outer peripheral portion 12a on the opposite side of the first contact surface 11a of the first sandwiching portion 1a is an elliptical partial arc. The second outer peripheral portion 12b on the opposite side of the second contact surface 11b of the second holding portion 1b is a partial arc of an ellipse. Therefore, if the abdomen of the thumb of the palm is applied to the first outer peripheral portion 12a and four fingers other than the thumb are applied to the second outer peripheral portion 12b, or vice versa, 4 other than the thumb is applied to the first outer peripheral portion 12a. If the finger of the book is applied and the abdomen of the thumb of the hand is applied to the second outer peripheral portion 12b, it is easy to grasp and turn in the opening direction. Moreover, since the grip portion is not rod-shaped as in the conventional case, it is safe and compact.

In the opener 10, the first holding portion 1a and the second holding portion 1b have a slightly elongated half-moon shape when viewed in the direction intersecting the longitudinal direction (Y direction). Further, the first holding portion 1a and the second holding portion 1b have half-moon-shaped notches 15a and 15b that are substantially similar to the slightly elongated half-moon-shaped contour shape inside. As a result, what is obtained by mold molding can be obtained with uniform strength without causing distortion. The notch portion 15a is smaller than the notch portion 15b because the friction material 16 is present.

In the opener 10, the first contact surface 11a of the first holding portion 1a is a friction material 16. As a result, the frictional gripping force with the cap 50 is improved. Examples of the friction material include known elastomers. The friction material 16 may be integrated with the first sandwiching portion 1a by two-color molding, may be adhered with an adhesive, or may be attached with a double-sided tape. In this example, the friction material 16 is integrated with the first holding portion 1a by two-color molding, and the end surface of the friction material 16 appears on the top plate 13 side.

In the opener 10, the first contact surface 11a and the second contact surface 11b have a length in the longitudinal direction (X direction) extending in one direction from the base end portion 19 and a width in the direction orthogonal to the longitudinal direction (Y direction). It is a rectangular surface having. The length of the first contact surface 11a and the second contact surface 11b in the X direction is about several cm to 10 cm, and the length in the Y direction is about 1 cm. This makes it possible to open various commercially available PET bottle caps.

The friction material 16 may be used for the second contact surface 11b of the second holding portion 1b, and the first contact surface 11a of the first holding portion 1a and the second contact surface of the second holding portion 1b. It may be used for both of 11b. Among them, it is preferable to attach the friction material 16 to the contact surface on the puller side in the opening direction, because the contact surface having a high contact force with the cap 50 becomes the friction material 16. Further, the first contact surface 11a and the second contact surface 11b may be textured. As a result, a contact surface having a high contact force with the cap 50 can be obtained.

In the opener 10, the top plate 13 has an elliptical shape when viewed in the Y direction. Therefore, the tip portion 14 on the anti-base end portion side of the top plate 13 has an arc shape when viewed in the Y direction. Further, the cross-sectional shape of the tip portion 14 of the top plate 13 is a convex shape (tip protrusion shape) in which the back surface of the top plate 13 is a flat surface and the front surface portion is gradually tapered in thickness. Further, the tip portion 14 of the top plate 13 is formed with a concave groove 141 having a shallow depth in the thickness direction on the base end portion side and the back surface from the tip end.

The concave groove 141 has an elongated crescent shape along the tip shape of the tip portion, and the depth gradually increases from both ends to the center portion (FIGS. 10 to 12). The maximum groove depth of the concave groove 141 may be about 2 mm. The tip portion 14 of the top plate 13 is for raising the pull tab, and the opener 10 is used upside down when the cap 50 is opened. The shallow crescent-shaped concave groove 141 is less noticeable than the overall shape of the opener 10 and can only be seen by touching it with a finger. It has excellent design and gives the opener 10 a sense of quality. ing.

Examples of the material of the cap opener main body, which is composed of the first holding portion 1a, the second holding portion 1b, and the top plate 13 excluding the friction material in the opener 10, include polycarbonate and polyethylene terephthalate.

The opener 10 further has a flexible ring 2 extending in the anti-X direction, one end of which is fixed to the base end 19. The flexible ring 2 can be used for opening screw caps of various sizes, and is particularly suitable for opening a cap having a small diameter that cannot be sandwiched between the first sandwiching portion 1a and the second sandwiching portion 1b.

The flexible ring 2 includes a pair of straight portions facing each other extending gradually in the anti-X direction from the base end portion 19, and an arc portion 22 connecting the tips of the straight portions 21a and 21b. In addition to the straight line, the straight line portion includes a large curved shape (a shape close to a straight line) that is slightly convex inward. The flexible ring 2 can be deformed into various shapes by the force of a finger or the like.

All or part of the inner peripheral surface of the flexible ring 2, in this example, all of the arc portion 22 and a part of the inner peripheral surfaces of the straight portions 21a and 21b continuous with the arc portion 22 are bitten into the cap. Concavo-convex 23 that enhances adhesion is formed. The unevenness 23 is uneven in the circumferential direction and extends in a direction intersecting the circumferential direction.

The maximum diameter inside the arc portion 22 of the flexible ring 2 is the same as or smaller than _{the minimum gap m 2 between the first sandwiching portion 1a and the second sandwiching portion 1b.} As a result, it is possible to open a cap having a compact size and a small diameter such as a cap of a pouch with a spout. The flexible ring 2 can be applied not only to a cap having a small diameter but also to a cap having a large diameter. Examples of the material of the flexible ring 2 include silicon rubber and the like. As a result, it has sufficient strength for opening the cap while being flexible.

One end of the flexible ring 2 is fixed to the base end portion 19 by fitting. That is, an H-shaped engaging recess is formed in the base end portion 19 which is a joint portion between the first sandwiching portion 1a and the second sandwiching portion 1b, and one end of the flexible ring 2 is formed in the engaging recess. An engaging convex portion 24 having a corresponding shape is formed (FIGS. 3 and 4). Then, the engaging concave portion of the base end portion 19 and the engaging convex portion 24 of the flexible ring 2 are fitted. As a result, the flexible ring 2 can be removed and stored during storage, increasing the selectivity of the storage location. In the present invention, as a method of fixing one end of the flexible ring 2 and the base end portion 19, in addition to the above-mentioned fitting method, a method of integrating by two-color molding may be used.

Next, a method of opening the cap 50 of the PET bottle using the opener 10 will be described with reference to FIGS. 13 and 14. The opener 10 is gripped by hand so that the top plate 13 is on the upper side, and the cap 50 is positioned between the first holding portion 1a, the second holding portion 1b, and the top plate 13. At this time, one side of the cap 50 comes into contact with the first contact surface 11a of the first holding portion 1a, and the substantially opposite side in the radial direction of one side of the cap 50 is the second contact surface 11b of the second holding portion 1b. The head of the cap 50 comes into contact with the back surface of the top plate 13. At this time, for example, as shown in FIG. 14, the user's hand 90 applies the thumb abdomen of the palm to the first outer peripheral portion 12a and four fingers other than the thumb to the second outer peripheral portion 12b. It is easy to grip and can be turned in the opening direction (arrow direction) with a weak force. One side of the cap 50 and the friction material 16 are in contact with each other with a strong frictional force and do not run idle. Since the shapes of the first outer peripheral portion 12a of the first holding portion 1a and the second outer peripheral portion 12b of the second holding portion 1b are both arcuate, the same effect can be obtained by both right-handed and left-handed people. be able to. Further, the head of the cap 50 is in contact with the back surface of the top plate 13, and the cap 50 is held and rotated at three points, so that the cap 50 can be opened stably.

Next, a method of raising the pull tab using the opener 10 will be described with reference to FIGS. 9 to 12 and 15. The opener 10 has the top plate 13 on the lower side. That is, the usage direction of FIG. 13 is turned upside down so that the concave groove 141 of the tip portion 14 of the top plate 13 faces upward. First, the tip portion 14 is inserted into the lower minute gap of the pull tab 60 from an oblique direction. Next, by further pushing the tip portion 14, the tip of the pull tab enters the recessed groove 141 of the opener 10, and the locking between the two is stabilized (FIG. 15). Next, using the edge of the can as a fulcrum, the hand of the top plate 13 is pushed down, and the tip of the tip portion 14 is pushed up by the principle of the lever. As a result, the pull tab 60 can be raised. The angle in the circumferential direction of the can into which the tip of the tip portion 14 is inserted into the lower minute gap of the pull tab 60 may be the outside slightly off the center. That is, even if the outer portion 142 (the portion having a shallow groove depth) of the tip portion 14 enters the lower minute gap of the pull tab 60, the tip portion 14 has an arc shape and the concave groove 141 has a depth toward the center portion. Is gradually increased in size, so that the tip of the pull tab 60 slides into the center of the concave groove 141 by simply rotating the tip portion 14 slightly. Therefore, the tip portion 14 of the top plate 13 may be inserted into the lower minute gap of the pull tab 60 as a rough guide, and the operation is easy.

Next, a method of opening a small-diameter cap such as a cap 70 of a pouch with a spout using the opener 10 will be described with reference to FIGS. 16 and 17. In this case, the flexible ring 2 of the opener 10 is used. First, the ring diameter of the flexible ring 2 is increased by hand and wound around the cap 70 (FIGS. 16 and 17). Then, the flexible ring 2 is tightened with a finger. As a result, the gap between the peripheral side surface of the cap 70 and the flexible ring 2 is substantially eliminated. Further, the unevenness 23 formed on the inner peripheral surface of the flexible ring 2 bites the side surface of the cap 70. Next, with the flexible ring 2 tightened, the cap 70 is turned in the opening direction. As a result, the cap 70 can be opened.

According to the caps opener of the present invention, a first sandwiching portion having a first contact surface that contacts one side of the cap and a second sandwiching portion that has a second contact surface that contacts the opposite side of one side of the cap. The first holding portion and the second holding portion are integrated at a base end portion so that the first contact surface and the second contact surface form a V shape. The anti-cap side of the first contact surface of the first sandwiching portion has an arc-shaped first outer peripheral portion, and the anti-cap side of the second contact surface of the second sandwiching portion has an arc-shaped first outer peripheral portion. Since it has two outer peripheral portions, it has a compact and safe structure, is easy to grip regardless of whether it is right-handed or left-handed, and it is possible to open a PET bottle cap or the like with a weak force. In addition, it can be used for caps of various sizes having a medium diameter or larger of about 15 mm.

According to the caps opener of the present invention, the first contact surface and the second contact surface have a length in the longitudinal direction (X direction) extending from the base end portion in one direction and a direction intersecting the longitudinal direction, respectively. It has a width of (Y direction) and has a top plate that is passed between the first contact surface and one end of the second contact surface in the Y direction, and the cap is the top plate. It is sandwiched so as to hit the back surface, the first contact surface and the second contact surface, and is turned in the opening direction to open the cap. Easy to do.

According to the caps opener of the present invention, since the top plate is attached from the outer peripheral end of the first outer peripheral portion to the outer peripheral end of the second outer peripheral portion, the strength after molding is increased and it is easy to grip when opening the cap.

According to the caps opener of the present invention, the tip of the top plate on the anti-base end side is for pull tab raising or stayion tab raising, and is arcuate in the thickness direction of the top plate. , Can be inserted into the lower gap of the pull tab from a wide range in the circumferential direction of the can.

According to the caps opener of the present invention, the cross-sectional shape of the tip of the top plate on the anti-base end side is a convex shape with a tapered thickness, so that it can be easily inserted into the lower gap of the pull tab.

According to the caps opener of the present invention, since the concave groove is formed in the thickness direction from the tip end side to the base end portion side and the back surface of the tip end portion, the locking with the pull tab is reliable and stable.

According to the cap opener of the present invention, the concave groove has a crescent shape when viewed in the thickness direction along the tip shape, so that even if the crescent-shaped end is inserted into the lower gap of the pull tab, the center By rotating it slightly toward the part, it can be securely locked with the pull tab. In addition, the shallow crescent-shaped concave groove is less noticeable than the overall shape of the opener and can only be seen by touching it with a finger, and the opener has a high-class feel because of its excellent design.

According to the caps opener of the present invention, since at least one of the first contact surface and the second contact surface is formed of a friction material, the cap has a strong bite and is opened with a weak force. be able to.

According to the cap opener of the present invention, since the friction material is an elastomer, a strong frictional force can be obtained and the durability is excellent.

According to the cap opener of the present invention, since the friction material is integrally molded with the first sandwiching portion or the second sandwiching portion by two-color molding, the friction material does not come off and is excellent in durability. In addition, there are no irregularities or gaps, and the design is excellent.

According to the caps opener of the present invention, a flexible ring extending in the anti-X direction is further provided so that one end is fixed to the base end portion, so that a small-diameter cap such as a cap of a pouch with a spout is opened. It is possible to do.

According to the caps opener of the present invention, the flexible ring connects a pair of substantially straight portions facing each other extending from the base end portion in the anti-X direction and extending in the anti-X direction, and the tip of the substantially straight portion. Since it consists of an arc portion, it can be used for opening caps of various diameters.

According to the caps opener of the present invention, since all or a part of the inner peripheral surface of the flexible ring is formed with irregularities that enhance the bite to the cap, a high frictional force can be obtained and is weak. It can be opened by force.

According to the caps opener of the present invention, the maximum diameter inside the arc portion of the flexible ring is substantially the same as or smaller than the minimum gap between the first sandwiching portion and the second sandwiching portion. Therefore, it can be used for opening caps having a wide range of dimensions, from large-diameter caps to small-diameter caps.

According to the cap opener of the present invention, since the flexible ring is made of silicon rubber, it can be deformed into various shapes with a weak force, and even a cap having a small diameter can be easily tightened, and the durability is improved. Excellent.

The cap opener of the present invention is compact, safe, right-handed or left-handed, easy to grip, and can be opened with a weak force, so that it can be opened in a wide range of fields such as home use, test research use, and business use. Can be used in.

1a 1st holding part 1b 2nd holding part 2 Flexible ring 10 Cap opener 11a 1st contact surface 11b 2nd contact surface 12a 1st outer peripheral part 12b 2nd outer peripheral part 13 Top plate 14 Top plate tip portion 15a 1st hollow 15b 2nd hollow 16 Friction material 19 Base end 50 Cap 51a One side of cap 51b Other side of cap 60 Steion tab 70 Small diameter cap 141 Concave groove

Claims (15)

A first holding portion having a first contact surface that contacts one side of the cap,
It has a second holding portion having a second contact surface that contacts the opposite side of one side of the cap.
The first holding portion and the second holding portion are integrated at a base end portion so that the first contact surface and the second contact surface form a V shape.
The anti-cap side of the first contact surface of the first holding portion has an arc-shaped first outer peripheral portion.
A cap type opener characterized in that the opposite side of the second contact surface of the second holding portion has an arc-shaped second outer peripheral portion. The first contact surface and the second contact surface each have a length in the longitudinal direction (X direction) extending from the base end portion in one direction and a width in the direction intersecting the longitudinal direction (Y direction), respectively. The cap has a top plate that is passed between the first contact surface and one end of the second contact surface in the Y direction, and the cap is the back surface of the top plate, the first contact surface, and the cap. The cap opener according to claim 1, wherein the cap is sandwiched so as to hit three surfaces of the second contact surface, and is turned in the opening direction to open the cap. The caps opener according to claim 2, wherein the top plate is attached from the outer peripheral end of the first outer peripheral portion to the outer peripheral end of the second outer peripheral portion. 2. Caps opener. The cap opener according to any one of claims 2 to 4, wherein the cross-sectional shape of the tip end portion of the top plate on the anti-base end portion side has a tapered convex shape. The cap opener according to claim 4 or 5, wherein a concave groove is formed on the back surface of the tip portion in the thickness direction. The cap opener according to claim 6, wherein the concave groove has a crescent shape along the tip shape when viewed in the thickness direction. The cap opener according to any one of claims 1 to 7, wherein at least one of the first contact surface and the second contact surface is formed of a friction material. The cap opener according to claim 8, wherein the friction material is an elastomer. The caps opener according to claim 8 or 9, wherein the friction material is integrally molded with the first sandwiching portion or the second sandwiching portion by two-color molding. The cap opener according to any one of claims 1 to 10, further comprising a flexible ring extending in the anti-X direction, one end of which is fixed to the base end portion. The flexible ring is characterized by comprising a pair of substantially straight portions facing each other extending gradually expanding in the anti-X direction from the base end portion and an arc portion connecting the tips of the substantially straight portions. The caps opener according to claim 11. The caps opener according to claim 12, wherein all or a part of the inner peripheral surface of the flexible ring is formed with irregularities that enhance the bite to the cap. 10.13 of claims 10 to 13, wherein the maximum diameter inside the arc portion of the flexible ring is substantially the same as or smaller than the minimum gap between the first sandwiching portion and the second sandwiching portion. The caps opener according to any one of the items. The cap opener according to any one of claims 11 to 14, wherein the flexible ring is made of silicone rubber.

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