JP5114158B2 - Blister pack - Google Patents

Description

  The present invention relates to a blister pack, and more particularly, to a blister pack used for packaging articles to be packaged such as pharmaceuticals such as tablets and capsules, foods and cosmetics.

Conventionally, for the packaging of pharmaceutical products such as tablets and capsules, a plurality of convex portions are formed on a plastic molded sheet, and a medicine made of a solid agent is accommodated in the accommodating portion in the convex portion and sealed with a seal sheet. There is a blister pack called a so-called PTP packaging in which a sticker sheet is sometimes punctured and taken out by a medicine made of a solid agent by pressing the convex part. This PTP-packed blister pack has advantages such as individual packaging of solid agents, easy counting management, compactness and easy storage, and relatively easy removal operation. It is often used for packaging of solid preparations. As an invention relating to such a blister pack of PTP packaging, for example, a patent application such as the following Patent Document 1 has been filed.

  However, in the conventional blister pack of PTP packaging as disclosed in Patent Document 1, although the take-out operation is relatively easy, the solid agent must be extruded by pressing the convex portions one by one. For example, when a user with a weak grip, such as an elderly person, uses it, it may be difficult to take out.

  Therefore, in order to solve such problems, for example, a patent application such as the following Patent Document 2 has been filed. The invention described in this patent document 2 can unpack only a container to be taken out at a time and take out a predetermined quantity of packaged items accurately and easily, as well as tablets and capsules, It is an object of the present invention to provide a blister pack that can be applied to packages such as granules, jellies, and liquids, and packages that are easily broken such as disintegrating tablets.

  In this blister pack, a sealing sheet 5 is bonded to a molding sheet 4 having a plurality of convex portions 2 to individually seal the accommodating portions 3 in the convex portions 2, and slits 6 are provided in the sealing sheet 5, The seal sheet 5 is taken out at a time by the slit 6 and is divided into an opening portion 7 covering the entire housing portion 3, and the breaking strength of the seal sheet 5 in the opening portion 7 is determined from the adhesive strength between the seal sheet 5 and the molded sheet 4. The gripping portion 8 is provided at the edge of the opening portion 7, and the opening portion 7 can be peeled off from the molded sheet 4 by pulling the gripping portion 8.

  However, in such a blister pack, it is configured to take out the article to be packaged by peeling off the partitioned opening portion from the molded sheet 4, so that the articles to be packaged such as tablets and capsules are taken out when taking out. There is a possibility of jumping out carelessly.

  On the other hand, there is an invention disclosed in Patent Document 3 below as a prior art that is most similar to the present invention, although it is not for pharmaceuticals such as PTP packaging. The invention according to Patent Document 3 includes a blister case having a housing recess for housing a product, and is disposed on the back of the blister case in a state of facing the housing recess, from one side of the blister case toward the other side. A sheet to be slid, and a sheet material is detachably attached to the back surface of the blister case so as to cover the opening of the housing recess, and one side end of the sheet material and one side edge of the mount Are connected, and the mount is slid from one side to the other side, whereby one end of the sheet material is pulled to the other side and peeled off from the back surface of the blister case.

  However, in the invention according to Patent Document 3, the mount and the sheet material are connected, the sheet material is pulled out by pulling the mount, and thereby can be opened, and when the mount is pulled, The sheet material may be inadvertently separated.

JP 2003-226360 A JP 2001-46469 A JP 2006-168760 A

The present invention was made to solve such problems, and when opening a blister pack used as a PTP package or the like, it requires an operation such as pressing a convex portion as in the prior art. And there is no risk that the packaged items will inadvertently jump out of the accommodating part in the convex part,
It is another object of the present invention to provide a blister pack that does not cause inadvertent separation between the backing sheet and the sheet material as a pulling means at the time of opening as described above.

The present invention has been made in order to solve the above-described problem, and a blister case having a protruding portion having an accommodating portion capable of accommodating an object to be packaged inside , and an opening of the accommodating portion of the blister case A drawing sheet disposed in a folded state so as to cover the portion, a piece in which a convex portion of the blister case is inserted and a hole for projecting the convex portion is formed, and the package The blister pack body is constituted by a cover sheet provided on the outer side of the drawing sheet, and the bent piece is drawn out. Of the two pieces facing the sheet, only one piece is extended outside the blister pack body, and a holding sheet is provided for holding the extended drawing sheet, A gripping piece is formed by the holding sheet and the extended pulling sheet, and the pulling sheet is pulled outside the blister pack body by gripping the gripping piece and pulling it to the opposite side of the blister pack body. blisters upon being withdrawn, characterized in that the is configured to be packaged was allowed to drop from the holes of the other pieces of the cover sheet the objects to be packaged is removable from housing section of the blister case Provide pack.

The blister case is composed of a piece having a convex portion and another piece having a hole for taking out the packaged object, and the hole on the other side of the blister case is formed on the other side of the cover sheet. It is also possible to configure so that the article to be packaged can be taken out from the blister case accommodating part by allowing the article to be packaged to drop from the hole of the blister case and the hole of the cover sheet that communicate with the provided hole. It is. The drawing sheet is preferably made of an aluminum laminate film obtained by laminating aluminum on a synthetic resin film. Furthermore, it is preferable that a hole for inserting a finger is formed in the gripping piece.

  Since the blister pack of the present invention is capable of taking out the object to be packaged from the blister pack body by gripping the gripping piece as described above and pulling out the pull-out sheet from the blister pack body, As described above, the invention does not require an operation such as pressing the convex portion in which the packaged article is housed, and the configuration is such that the packaged article is taken out by rolling the sheet as in the invention according to Patent Document 2 above. Therefore, there is no fear that the packaged object will pop out accidentally when the packaged article is taken out.

Furthermore, the drawing sheet is disposed in the blister pack body in a folded state,
Of the two facing sheets of the folded drawing sheet, only one piece is extended to the outside of the blister pack body, and a holding sheet is provided to hold the extended drawing sheet, A gripping piece is formed by the sandwiching sheet and the extended pulling sheet. When the gripping piece is gripped and the pulling sheet is pulled out, the pulling sheet is sandwiched together with the sandwiching sheet. Since it will be pulled out, the sandwiching sheet and the pulling sheet will not be separated, and the pulling operation will be performed in a stable state, and when the mount is pulled as in Patent Document 3 above In addition, there is no problem that the mount and sheet material may be inadvertently separated.

  Further, since the drawing sheet is disposed in the blister pack body in a state of being folded so as to cover the opening portion of the housing part of the blister case, there is a protective effect on the packaged object housed in the housing part. There is an effect of improving. In addition, when the gripping piece is gripped and the pulling sheet is pulled out, the folded state of the pulling sheet is automatically canceled, so only one operation of gripping the gripping piece and pulling out the pulling sheet. Thus, the packaged item can be taken out, and the drawing operation can be easily performed.

  Furthermore, by performing the extraction operation of the extraction sheet with the opening portion of the blister case housing portion facing upward, even after the extraction sheet is extracted from the blister pack body, without dropping the packaged item, It can be maintained in the state of being accommodated in the accommodating portion, and therefore, there is an effect that the work to be taken out can be taken out at any place.

  Hereinafter, a blister pack according to an embodiment will be described with reference to the drawings.

As shown in FIGS. 1 and 2, the blister pack according to one embodiment includes a blister pack body 1 and a gripping piece 16. The blister pack body 1 is for pulling out a blister case 2 having a housing part capable of housing an article to be packaged and a folded state so as to cover an opening 12a of the housing part 12 of the blister case 2 It consists of a sheet 4 and a cover sheet 3 adhered to the outside of the blister case 2.

The blister case 2 is entirely made of synthetic resin, and is formed by connecting one piece 2a and another piece 2b through a bent portion 2c, and further extending an extension piece 2d from the other piece 2b. Yes. The extension piece 2d is configured to be separated from the other piece 2b through the perforation 13. And the convex part 14 is protrudingly provided in the outer side of the piece 2a of the said blister case 2, The inside of this convex part 14 is formed as the accommodating part 12 in which the said to-be packaged object can be accommodated.
Further, a hole 5 and a hole 6 are formed in the other piece 2b and the extension piece 2d of the blister case 2, respectively.

The cover sheet 3 is made of thin paper that can be a label, and information such as letters is written on the surface.
It is configured to be able to perform printing, printing, etc., such as stamping, marking, and laser marker. Similar to the blister case 2, the cover sheet 3 is configured by connecting one piece 3a and another piece 3b through a bent portion 3c. A hole 7 is formed in the other piece 3 b of the cover sheet 3. Further, a hole 9 is formed in one piece 3 a of the cover sheet 3, and the convex portion 14 of the blister case 2 is inserted into the hole 9, and the convex portion 14 protrudes from the hole 9.

Further, the drawing sheet 4 is composed of an aluminum laminated film obtained by laminating aluminum on a synthetic resin film, and similarly to the blister case 2, one piece 4a and the other piece 4b are continuously provided via a bent portion 4c. The extension piece 4d extends from the other piece 4b. A hole 19 is formed in the extension piece 4d of the drawing sheet 4 so as to communicate with the hole 6 formed in the extension piece 2d of the blister case 2.

Further, sandwiching sheets 15 and 15 are attached to the outer side surface of the extension piece 4 d of the drawing sheet 4 and the outer side surface of the extension piece 2 d of the blister case 2. The sandwiching sheets 15 and 15 are made of a thin paper that can be a label made of the same material as the cover sheet 3, and, like the cover sheet 3, information such as letters is written on the surface, stamped, engraved, printed as a laser marker, and printed. It is comprised so that it may be equal. The sandwiching sheets 15 and 15 are respectively provided with holes 8 and 10 so as to communicate with the hole 6 of the extension piece 2d of the blister case 2 and the hole 19 of the extension piece 4d of the drawing sheet 4 respectively. Yes.

  As a result of providing such sandwiching sheets 15, 15, the extension piece 4 d of the drawing sheet 4 is sandwiched between the sandwiching sheets 15, 15. A gripping piece 16 is formed by the extension piece 4d of the drawing sheet 4 as described above, the extension piece 2d of the blister case 2 and the sandwiching sheets 15 and 15 on both sides.

As shown in FIG. 1, the blister case 2, the cover sheet 3, and the drawing sheet 4 are formed in a substantially rectangular shape on a plane, and the convex portion 14 of the blister case 2 is formed in a substantially oval shape on a plane. Moreover, the hole 5 of the blister case 2 and the hole 7 of the cover sheet 3 are formed in a plane substantially oval shape. Furthermore, the hole 6 of the blister case 2, the hole 19 of the drawing sheet 4, and the holes 8, 10 of the sandwiching sheets 15, 15 are each formed in a planar circular shape as shown in FIG. 1.

And the state which unfolded the blister pack 17 which consists of such a structure is as follows. As shown in FIG.3 and FIG.4, one piece 1a and the other piece 1b of the blister pack main body 1 were arranged in series via the bending part 1c. In this state, the grip piece 16 is continuously provided from the other piece 1b, and the one piece 1a is bent to the other piece 1b side through the bent portion 1c of the blister pack main body 1 as described above. The blister pack 17 is configured as shown in FIGS. 1 and 2.

In this way, a plurality of blister packs 17 formed by connecting the three pieces of the blister pack body 1, the one piece 1 a and the other piece 1 b, and the gripping piece 16, are further provided in a direction intersecting the above-described connecting direction. As a result, a blister pack connecting body 18 as shown in FIG. 5 is obtained. In this case, a perforation 20 is formed at the boundary between the one piece 1a and the other piece 1b of one blister pack 17 and the one piece 1a and the other piece 1b of the blister pack 17 adjacent to the one blister pack 17. ing. However, the formation of such a perforation 20 is not a condition, and it is also possible to form a blister pack connecting body 18 by connecting a plurality of blister packs 17 without forming the perforation 20. is there.

Further, a notch 21 is formed in a boundary line portion between the grip piece 16 of one blister pack 17 and the blister pack 17 adjacent to the one blister pack 17. Accordingly, in the gripping piece 16 portion, the adjacent blister packs 17 and 17 are not connected to each other. However, it is also possible to form a continuous state through a perforation without forming such a cut 21 and disabling it. In this case, the gripping piece 16 is gripped and the pulling-out sheet 4 is pulled out after being divided for each gripping piece 16 of the adjacent blister packs 17 and 17 through the perforation.

The blister pack 17 of the present embodiment is used, for example, for wrapping pharmaceutical products such as capsules and tablets. At that time, since a pharmaceutical product per unit (1 capsule for a capsule and 1 tablet for a tablet) is accommodated in the accommodating portion 12 of one blister pack 17 as an encapsulated bag, as shown in FIG. The blister pack connecting body 18 accommodates the number of medicines for which the blister pack 17 is connected. For example, in the example of FIG. 5 described above, since six blister packs 17 are connected to form a blister pack connecting body 18, six capsules or six tablets of medicine are stored.

As in the case of general PTP packaging and the like, a plurality of such blister pack continuous bodies 18 are distributed at the time of distribution as a product sold by a pharmaceutical manufacturer or at the time of prescription provided to a patient from a dispensing pharmacy or the like. The blister pack 17 is used in a state where it is continuously provided.

Even when a user who administers a medicine such as a patient uses it, the blister pack connecting body 18 can be opened or taken out in the state of the blister pack connecting body 18. It is also possible to unpack and take out the packaged items after dividing every time.

FIG. 5 shows a state in which the blister pack connecting body 18 is unfolded. Before using the blister pack connecting body 18, as shown in FIGS. The blister pack 17 is in a state where one piece 2a is bent to the other piece 2b side, and a plurality of blister packs 17 in such a state that the one piece 2a is bent to the other piece 2b side are connected in series. The body 18 is formed.

In the present embodiment, the blister pack 17 has been described as a blister pack 17 that can accommodate a single encapsulated bag, and the blister pack continuous body 18 has been described as being connected to a plurality of blister packs 17 for convenience. The “blister pack” in FIG. 1 can accommodate not only the blister pack 17 that can accommodate one encapsulated bag in the present embodiment, but also one encapsulated bag such as the blister pack connecting body 18. This means that a plurality of such items are provided in series, and therefore the number of the accommodating portions 12 provided in the blister pack is not limited.

Next, the case where the blister pack which consists of such a structure is opened is demonstrated. As described above, a user such as a patient can open or take out an object to be packaged in the state of the blister pack connecting body 18 in which a plurality of blister packs 17 are continuously provided. After the body 18 is divided for each blister pack 17, it is also possible to open or take out the packaged object.

However, since the operation and action for taking out the package are the same regardless of which procedure is adopted, here, for convenience, only one blister pack 17 is focused, and the blister pack 17 is opened to be packaged. The operation and action for taking out an object will be described.

  First, as shown in FIG. 6, the convex portion 14 of the blister case 2 faces downward, that is, the opening portion 12a of the accommodating portion 12 of the blister case 2 faces upward, and in this state, the gripping piece 16 is disposed as shown in FIG. Pull in the direction of the arrow.

In this case, the extension piece 2d of the blister case 2 constituting the gripping piece 16, the extension piece 4d of the drawing sheet 4 and the clamping sheets 15 and 15 have holes 6, 19 and 8, respectively. Since it is perforated, even if it is a user, such as an elderly person with weak grip strength, by inserting a finger into the hole 6, the hole 8, the hole 19, and the hole 10 to grip the gripping piece 16, a sheet for pulling out The sheet 4 for pulling out can be easily pulled out in the direction of the arrow while directly touching the finger 4.

  Then, by pulling the gripping piece 16 as it is in the direction of the arrow in FIG. 7, the folded state of the drawing sheet 4 in which the one piece 4a is bent to the other piece 4b side through the bent portion 4c is released, and further the gripping piece 16 7 is pulled out from the blister pack body 1 as shown in FIG.

  In this case, since the blister pack main body 1 is inverted so that the opening 12a of the accommodating portion 12 of the blister case 2 that accommodates the article to be packaged is facing upward, the extraction sheet 4 is being extracted. Even after the extraction sheet 4 is extracted from the pack body 1, the packaged item is maintained in the storage portion 12 as shown in FIG.

And when taking out a to-be-packaged object from the blister pack main body 1, the hole 5 of the blister case 2 made into the communication state and the hole 7 of the cover sheet 3 are reversed by inverting the blister pack main body 1 as shown in FIG. Thus, the object to be packaged 11 can be dropped and the object to be packaged can be easily taken out.

In the present embodiment, the drawing sheet 4 is accommodated in the pack body 1 in a state where the one piece 4a is bent to the other piece 4b side through the bent portion 4c as described above, and the bent drawing sheet 4 is folded. Then, the container 12 of the blister case 2 is closed, the gripping piece 16 is gripped, and the pullout sheet 4 is pulled out from the blister pack main body 1 so that the article 11 can be taken out from the pack main body 1. Therefore, the operation of taking out the package by pushing the convex portion and the operation of peeling the seal sheet from the blister case 2 are not required, and the package 11 is inadvertently dropped from the blister pack body 1 during the operation. There is no risk of doing so.

  Moreover, in this embodiment, since the sheet | seat 4 for extraction is accommodated in the pack main body 1 in the state which bent the piece 4a to the other piece 4b side via the bending part 4c as mentioned above, the sheet | seat 4 for extraction Is in a state of being disposed so as to cover the opening portion 12a of the accommodating portion 12 of the blister case 2 in a double state, and the protective effect for the article 11 to be packaged accommodated in the accommodating portion 12 is improved.

  Moreover, when the gripping piece 16 is gripped and the pulling sheet 4 is pulled out, the folded state of the pulling sheet 4 is automatically canceled, so the gripping piece 16 is gripped and the pulling sheet 4 is pulled out. The package 11 can be taken out by only one operation, and the pull-out operation can be easily performed.

In the above embodiment, the cover sheet 3 is composed of thin paper that can be a label as a whole, but is not limited thereto, and can be composed of, for example, thick paper that can be a mount. In this case, as shown in FIG. 10, the blister case 2 is provided only in the peripheral portion having the convex portion 14, and the bent portion 2 c is interposed as in the embodiments of FIGS. The one piece 2a and the other piece 2b are connected in series, and the extension piece 2d is not extended from the other piece 2b.

Further, in the embodiment of FIG. 10, as shown in the figure, the sandwiching sheets 15 and 15 constituting the gripping piece 16 are formed by being bent through a bent portion 15a. The sandwiching sheet 15 is also made of thick paper, like the cover sheet 3. The operation of taking out the article 11 to be packaged from the blister pack body 1 by grasping the gripping piece 16 and pulling out the extraction sheet 4 from the blister pack body 1 is the same as that in the embodiment of FIG. Detailed description is omitted.

Furthermore, in the said embodiment, although the holding piece 16 was extended and formed from the pack main body 1, not only this but the holding piece 16 was bent with respect to the pack main body 1 as shown in FIG. It may be provided in such a state. In this case, the gripping piece 16 that has been bent as shown in FIG. 12 is developed, and the gripping piece 16 is gripped in this state in the same manner as in the embodiment of FIG. Will be pulled out from.

Furthermore, in the said embodiment, although the blister pack main body 1 and the holding piece 16 were formed in planar substantially rectangular shape, the shape of the blister pack main body 1 and the holding piece 16 is not limited to this embodiment. Further, the shape of the convex portion 14 of the blister case 2 and the shape of the holes 5 and 7 are not limited to the planar substantially oval shape of the above embodiment. Further, the shapes of the holes 6, 8, 10, 19 are not limited to the planar circular shape of the above embodiment.

Furthermore, the material of the blister case 2 may be any of various synthetic resin materials such as polyolefin synthetic resins such as polyethylene and polypropylene, polyester, and polyvinyl chloride. Further, it is possible to use a so-called aluminum molded film obtained by laminating aluminum and a synthetic resin sheet. As such an aluminum molded film, for example, a base film made of aliphatic polyamide, polyethylene terephthalate, or the like is laminated with aluminum, and polyvinyl chloride, polypropylene, or the like is laminated on the aluminum to form a multilayer structure. .

Furthermore, in the said embodiment, although the whole sheet 4 for extraction was comprised with the aluminum laminate film, the material of the sheet 4 for extraction is not limited to the said embodiment. However, by using an aluminum laminate film, there is an advantage that the generation of wrinkles can be greatly reduced as compared with the case of using aluminum foil or the like. Moreover, since it is a laminate film of aluminum and a synthetic resin film, there is no possibility that the drawing sheet 4 will be inadvertently damaged during drawing.

The material of the drawing sheet 4 is not limited to the aluminum laminate film or aluminum foil as described above, and it is also possible to use a material made only of a synthetic resin film not containing a metal such as aluminum. . In this case, it is possible to use a film in which two or more kinds of synthetic resins are laminated, but it is also possible to use a single-layer synthetic resin film that is not laminated.

  In the above embodiment, the cover sheet 3 and the gripping piece 16 are made of paper such as thin paper or cardboard that can be used for the label. The sheet is not limited to paper, and for example, a synthetic resin sheet can be used.

  Further, in the above embodiment, the blister case 2 is configured such that the one piece 2a and the other piece 2b are connected to each other through the bent portion 2c by bending one synthetic resin sheet. The blister case 2 may be formed by bonding the end portions of two synthetic resin sheets, for example, without being formed by bending one synthetic resin sheet. Similarly, the cover sheet 3 is not limited to a structure in which the one piece 3a and the other piece 3b are connected to each other through the bent portion 3c as in the above-described embodiment. It may be configured by pasting end portions.

  Further, in the above-described embodiment, the holes 8 are formed in all of the four constituent members, that is, the outer clamping sheets 15 and 15, which are constituent members of the gripping piece 16, the extension piece 2 d of the blister case 2, and the extension piece 4 d of the drawing sheet 4. 10, 6, 19 are drilled in a communicating state, so that a finger is inserted into the hole 8, 10, 6, 19 in such a communicating state, and the finger is brought into contact with the inner peripheral surface of the hole, thereby pulling out The pulling sheet 4 is pulled out of the blister pack body 1 to pull out the pulling sheet 4 very easily, but a preferable effect is obtained. This is not an essential condition for the present invention. It is also possible to pull out the pull-out sheet 4 from the blister pack body 1 without gripping the gripping piece 16 and gripping the gripping piece 16 having no hole.

  In addition, the use of the blister pack of the present invention is not limited to the pharmaceuticals, foods, cosmetics and the like as described above, and the use thereof is not limited.

The top view which shows the pack main body of the blister pack as one Embodiment. AA sectional view taken on the line AA of FIG. The top view of the blister pack of the state which expanded the bending part. BB sectional drawing of FIG. The top view of a blister pack connection body. Sectional drawing immediately after starting extraction of the sheet | seat for extraction. Sectional drawing in drawing operation of the sheet | seat for extraction. Sectional drawing after drawing of the sheet | seat for extraction. Sectional drawing which shows the state which takes out to-be-packaged goods from a pack main body. Sectional drawing of other embodiment. Sectional drawing of other embodiment. Sectional drawing of the state which expand | deployed the blister pack of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Blister pack body 2 ... Blister case 3 ... Cover sheet 4 ... Pull-out sheet 11 ... Packaged object 12 ... Storage part 16 ... Holding piece

Claims (3)

A blister case (2) in which a convex part (14) having an accommodating part (12) capable of accommodating an object to be packaged is projected outward , and an opening part of the accommodating part (12) of the blister case (2) (12a) is inserted so that the sheet for drawing (4) arranged in a bent state and the convex part (14) of the blister case (2) are inserted to project the convex part (14). A piece (3a) in which a hole (9) is formed, and another piece (3b) in which a hole (7) for taking out the package is formed, and the piece (3a) and the other The blister pack body (1) is composed of the piece (3b) and the cover sheet (3) provided outside the drawing sheet (4), and the folded drawing sheet (4) faces 2 Of the pieces, only one piece is the blister pack body (1) There is provided a sandwiching sheet (15) that extends outward and sandwiches the extending drawing sheet (4). The sandwiching sheet (15) and the extending drawing sheet are provided. (4), a gripping piece (16) is formed, and the gripping piece (16) is gripped and pulled to the opposite side of the blister pack body (1), whereby the pulling sheet (4) is moved to the blister pack body. when it was pulled out to the outside of (1), the receiving of the material to be packaged is dropped through the hole (7) of the other piece (3b) blister case of the cover sheet to be packaged (3) (2) A blister pack configured to be removable from the portion (12). The blister case (2) is composed of one piece (2a) in which the convex portion (14) is formed and another piece (2b) in which a hole (5) for taking out the packaged object is formed. The hole (5) on the other piece (2b) side of the blister case (2) communicates with the hole (7) drilled on the other piece (3b) side of the cover sheet (3), and the communication The packaged material can be dropped from the hole (5) of the blister case (2) and the hole (7) of the cover sheet (3) so that the packaged product can be taken out from the housing part (12) of the blister case (2). The blister pack according to claim 1, wherein the blister pack is configured as follows.   The blister pack according to claim 1 or 2, wherein a hole for inserting a finger is formed in the gripping piece (16).

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