JP5077912B2 - Bag opening device - Google Patents

Description

The present invention relates to a bag opening equipment to open the powder or liquid bag containing the contents of the.

  The dialysate (bicarbonate dialysate) used for the treatment of patients with renal failure in hospitals, etc., is generally an A agent composed of a plurality of components other than sodium bicarbonate such as various electrolytes, glucose, PH preparations, and an agent B containing sodium bicarbonate. And two types of drugs (dialysis drugs) mixed with water. In recent years, from the viewpoint of improving transportability, these A agent and B agent powdered (including granules) (hereinafter referred to as powdered dialysis drug) are dissolved before dialysis to prepare concentrated solutions (for dialysis). The mainstream is to prepare a dialysate having a predetermined concentration by preparing a stock solution). In order to obtain each dialysis stock solution, a dissolution apparatus for dissolving the dialysis powder drug is used.

By the way, the powder medicine for dialysis is stored in, for example, a flexible bag body, and at the time of preparing the dialysis stock solution, a part of the bag body is excised and opened, and the technique is put into the dissolution tank of the dissolution apparatus Has been conventionally proposed (see, for example, Patent Document 1). Such a conventional bag body opening device cuts and opens the upper part of the bag body sequentially sent by the conveyor, inverts the bag body, and drops the internal dialysis stock solution into the dissolution tank and throws it into the dissolution tank. It is configured.
JP 2005-271945 A

  However, in the conventional bag body opening device, since the bag body is opened in a state exposed to the outside air, there is a problem that various germs and foreign substances are easily mixed from the opening location, which is not preferable in terms of hygiene management. It was. Moreover, since the dialysis drug as the contents is dropped into the dissolution tank by simply turning the bag upside down, there is a risk that the dialysis drug will be scattered around in the process of dropping, especially in the case of the A agent There was also a problem that the odor of acetic acid spread to the surroundings, deteriorating the working environment. Such a problem also occurs when the dialysis drug contained in the bag is in a liquid state.

The present invention has been made in view of such circumstances, that provides it is possible to prevent contamination of such bacteria from the opening portion of the bag body, the bag body opening device capable of avoiding deterioration of the working environment It is in and this.

The invention described in claim 1 is a bag opening device for opening a bag containing powdered or liquid contents and taking out the contents in the bag to the outside. A close contact means for covering a part and forming a closed space separated from the outside, and the bag body is opened in the closed space formed by the close contact means contacting the outer surface of the bag body A dissolution tank for dissolving the contents taken out from the bag body with water through a pipe connected to the bottom surface side of the contact means. The contents in the bag body can be dissolved and accommodated in the dissolution tank by circulating water between the dissolution tank, the bag body, and the closed space.

  According to a second aspect of the present invention, in the bag body opening device according to the first aspect, the contact means is in close contact by sucking the outer surface of the bag body with a negative pressure.

  A third aspect of the present invention is the bag opening device according to the first or second aspect, further comprising a pressing means capable of pressing a surface of the bag body opposite to the surface to which the close-contact means is in close contact. It is characterized by.

According to a fourth aspect of the present invention, in the bag opening device according to any one of the first to third aspects, the unsealing means includes a tubular member capable of circulating water therein, and a tip of the tubular member. A cutting tool that can be opened by tearing the bag body, and a driving means that can move the cutting tool from the standby position to the opening position of the bag body. By flowing water in the member, water is ejected from the distal end of the tubular member, and the contents in the bag body are caused to flow into the closed space.

According to a fifth aspect of the present invention, in the bag opening device according to any one of the first to fourth aspects, at least the outer surface to which the contact means is in close contact with the bag is substantially flat. It is characterized by.

According to the first aspect of the present invention, since the bag body is opened by the opening means in the closed space formed by the close contact means being in close contact with the outer surface of the bag body, various bacteria from the opening location of the bag body, etc. Can be prevented, and scattering to the surroundings can be prevented to avoid deterioration of the working environment.
Furthermore, since the closed space is communicated with a dissolution tank for mixing the content taken out from the bag with water and dissolving it, the opening operation, the content extraction operation, and the content to the dissolution tank A series of operations such as a closing operation can be automatically performed.

  According to the second aspect of the present invention, since the contact means is in close contact by sucking the outer surface of the bag body with a negative pressure, the close contact with the outer surface can be more reliably performed and the contents are taken out. The contact can be easily released after

  According to the third aspect of the present invention, since the pressing means capable of pressing the surface of the bag body opposite to the surface to which the contact means is in contact is provided, the contact operation of the contact means is assisted to adhere to the outer surface of the bag body. Can be performed more reliably.

According to the fourth aspect of the present invention, in a state where the bag body is opened with the cutting tool, water is circulated in the tubular member to eject water from the distal end of the tubular member, and the contents in the bag body are made into the closed space. Since it is made to flow out, the content can be taken out more reliably and the dissolution of the content can be promoted.

According to invention of Claim 5, since the outer surface to which a close_contact | adherence means closely_contact | adheres at least is made into the substantially flat bag body, the close_contact | adherence by a close_contact | adherence means can be performed easily and reliably.

Hereinafter, embodiments of the present invention will be specifically described with reference to the drawings.
The bag opening apparatus according to the present embodiment is for opening a bag body containing a dialysis drug for producing a dialysate to be supplied to a dialysis machine. As shown in FIG. The bag body sent out by the apparatus 1 is sequentially received, and after opening, the contents can be put into the melting apparatus 3. Here, the bag body is a flexible bag-like member (soft vinyl material or the like) that contains a predetermined amount of a dialysis drug (including powder and liquid) and is sealed. In the figure, various devices for dialysis drugs of either agent A or agent B are shown, and similar devices are necessary for other dialysis drugs.

  As shown in FIG. 2, the bag transport apparatus 1 is mainly composed of a plurality of pallet-shaped mounting means 4 and take-out means 6 composed of pushers or the like disposed at the take-out position A. The placing means 4 can place each bag body H and can move sequentially from the upstream side to the take-out position A, and each lower portion is connected by a chain 5 suspended in an annular shape, along the transport path. It is configured to be able to move. That is, when the chain 5 is rotated by driving a motor or the like (not shown), the placing means 4 moves along the transport direction, so that the bag body H before opening is placed on the placing means 4 on the upstream side. If it does, it will be conveyed to the extraction position A. In addition, it is good also as a belt etc. which can connect and move each mounting means 4 instead of the chain 5. FIG.

  Further, as shown in FIG. 3, the placing means 4 includes a standing wall portion 4a for holding the bag body H, a placing surface 4b composed of a substantially flat surface between the standing wall portions 4a, and a groove in the placing surface 4b. It has the recessed part 4c which can avoid the contact with the lower surface of the bag body H formed in the shape. Then, when the operator places the bag body H on the placement surface 4b on the upstream side of the transport path, only the vicinity of the edge in the front-rear direction on the lower surface is placed in contact with the placement surface 4b, and the others. Since the lower surface of the bag body H is separated from the bottom surface of the concave portion 4c at the position (substantially central position corresponding to the concave portion 4c and later opened), the state where the portion does not contact is maintained. The bag body H will be conveyed.

  The take-out means 6 can move the bag body H on the placing means 4 at the take-out position A to a position B off the transport path by moving in a direction substantially perpendicular to the transport direction by a drive source (not shown). Is. Thereby, if the contact means 7 of the bag body opening device 2 to be described later is disposed at the position B, for example, the conveyed bag bodies H can be sequentially sent to the contact means 7. On the other hand, since the recess 4c has a groove shape extending along the moving direction of the take-out means 6, even at the time of delivery by the take-out means 6, the approximate center on the lower surface of the bag body H does not come into contact. Yes.

  According to the said bag body conveying apparatus 1, the bag body H before opening can be sent out to the contact | adhering means of the bag body opening apparatus 2, accommodation of several bag bodies H, sending out of the bag bodies H one by one, bag body opening apparatus A series of operations such as opening by 2 can be automatically performed, and the opening portion on the lower surface of the bag body H comes into contact with the mounting means by the concave portion 4c of the mounting surface, so that foreign matter or the like adheres. Can be prevented. In addition, it may replace with the above-mentioned taking-out means 6, and may be other means (thing which lifts and transfers).

  Here, the bag body opening device 2 opens the bag body H sequentially sent out by the bag body conveyance device 1 and takes out the contents (medicine for dialysis) in the bag body H to the outside. As shown in FIGS. 4 to 9, the close contact means 7 that can be in close contact with the outer surface of the bag body H, and the tubular member 8 and the cutting tool 10 for opening the bag body H. Etc., and a pressing means 19 for pressing the bag body H from above.

  The close contact means 7 is for forming a closed space S that covers and closes a part of the lower surface (outer surface) of the bag body H and is separated from the outside, and an opening 7e that forms the closed space S; A close contact surface 7a that is formed at the periphery of the opening 7e and can be in close contact with the outer surface of the bag H, a groove 7b that is formed in a substantially annular shape while facing the close contact surface 7a, and a tubular member 8 are inserted. And a connecting portion 7d for connecting the groove 7b and the negative pressure generating means 12 to each other. A seal member 11 is formed on the inner wall surface of the insertion hole 7c.

  Then, as shown in FIG. 9, when the negative pressure generating means 12 is driven while placing the bag body H on the contact surface 7a, the outer surface of the bag body H is sucked by the negative pressure through the groove 7b, The outer surface and the contact surface 7a are firmly adhered to each other, and the opening 7e is closed by the outer surface surrounded by the groove 7b to form the closed space S (the insertion hole 7c is formed in the tubular member 8). And is blocked by the seal member 11). The closed space S is in a liquid-tight state, and is configured so that water supplied to the inside can be discharged through the pipe L1 as described later.

  The unsealing means is composed of a tubular member 8, a blade 10, and the like. Among these, the tubular member 8 is connected to a pipe L2 to be described later, and can circulate water through the internal flow path 8a, and the driving means 9 (FIG. 4)). As shown in FIG. 7, a holder 8b for fixing the two blades 10a and 10b is attached to the distal end (upper end in the figure) of the tubular member 8.

  That is, as shown in FIG. 8, mounting grooves 8ba and 8bb are formed in the holder 8b in a substantially orthogonal direction, and the cutting tools 10a and 10b are inserted into the mounting grooves 8ba and 8bb, respectively. It is. The cutting tool 10 (10a, 10b) can be opened by tearing the bag body H. When the cutting tool 10 is inserted into the bag body H at the time of opening, the inside of the bag body H and the flow path 8a communicate with each other. It is configured.

  However, when the driving means 9 is driven, the tubular member 8 is configured to move from the standby position to the opening position. That is, when the tubular member 8 is in the standby position, as shown in FIG. 9, the blade 10 is separated from the lower surface of the bag body H, and when the tubular member 8 moves to the opening position by driving of the driving means 9, Since 10 cuts the lower surface of the bag body H and reaches the inside thereof, the inside and the flow path 8a communicate with each other.

  The pressing means 19 can press the surface (the upper surface of the bag body H in the figure) opposite to the surface to which the contact means 7 (contact surface 7a) of the bag body H is in close contact, and thereby the contact means 7 7, the lower surface of the bag body H can be reliably brought into contact with the contact surface 7 a, and the suction action by the groove 7 b can be more reliably applied. Therefore, the close contact operation of the close contact means 7 can be assisted to make the close contact with the outer surface (lower surface) of the bag body H more reliably. In addition, when the contents are powdery, by pressing with the pressing means 19, the solidified and lump-shaped one can be dissolved while being crushed, and the dissolution is performed more smoothly. be able to.

  Further, the pressing means 19 may be provided with a detecting means for detecting clogging (blocking) of the opening location by the opening means. An example of such detecting means is one that detects the swelling of the bag body H by its displacement or pressure. Thereby, it is possible to avoid continuing to spout water, which will be described later, into the bag body H while the opening is insufficient.

  As shown in FIG. 4, the dissolution apparatus 3 includes a dissolution switch 13 in which a float switch F1 is disposed and is connected to a water supply source 18, and is disposed below the dissolution tank 13, And a storage tank 14 provided with a float switch F2. The dissolution tank 13 and the storage tank 14 are connected via a pipe L3, and an electromagnetic valve 16 is connected to the middle of the pipe L3.

  Furthermore, the dissolution tank 13 and the closed space S are connected via pipes L1 and L2, and a pump 15 is connected in the middle of the pipe L2. More specifically, the end of the pipe L1 is connected to the bottom surface side of the closed space S, the end of the pipe L2 is connected to the lower end of the tubular member 8, and when the pump 15 is driven, the pipe L2 is water ( The liquid in the dissolution process) flows and the water reaches the inside of the bag body H through the tubular member 8 and falls into the closed space S together with the contents, and then is discharged to the dissolution tank 13 through the pipe L1. It is configured.

  That is, water (including liquid in the dissolution process) circulates between the dissolution tank 13 and the bag body H and the closed space S, and the contents in the bag body H are taken out and dissolved in the process. is there. The dissolved dialysis drug is stored in the lysis tank 13 as a dialysis stock solution, and is opened and stored in the lower storage tank 14 by opening the electromagnetic valve 16, via the discharge line L5. Sequentially discharged to the dialysis machine side. In addition, the code | symbol L4 and 17 in the figure has shown the air filter arrange | positioned in the middle of the piping which connects the storage tank 14 (similarly the dissolution tank 13) and the exterior, and the said piping L4.

Next, the operation in the bag opening device 2 and the dissolving device 3 will be described.
The unsealed bag body H sequentially sent out from the bag body conveying device 1 is placed on the contact means 7 and then the upper surface is pressed by the pressing means 19. In this state, the negative pressure generating means 12 is driven to bring the lower surface of the bag body H into close contact, thereby forming the closed space S, and then the driving means 9 is driven to move the tubular member 8 from the standby position to the bag body H. To the unsealing position, and the bag body H is unsealed.

  On the other hand, water for dissolution is supplied from the water supply source 18 into the dissolution tank 13, and a predetermined amount of water (with a capacity to dissolve the dialysis drug contained in one bag H is detected by the float switch F1. Water). At this time, the electromagnetic valve 16 is closed. When the pump 15 is driven, the water in the dissolution tank 13 reaches the bag body H via the pipe L2 and the flow path 8a in the tubular member 8, and the contents in the bag body H (dialysis drug). At the same time, after falling into the closed space S, it flows to the dissolution tank 13 via the pipe L1.

  The drive of the pump 15 may be started before or after opening by the blade tool 10, but if the pump 15 is driven before opening and water is ejected from the tip of the tubular member 8. The blade 10 can be prevented from being pierced by the pressure of the water at the time of opening, and the life of the blade 10 can be improved. Further, since it is not necessary to flow a large amount of water during the operation of the pump 15, it can be set to a small flow rate using an inverter or the like.

  Accordingly, water (including the liquid in the dissolution process) circulates in the dissolution tank 13, the bag body H, and the closed space S, all the contents in the bag body H are taken out, and the circulating liquid is uniform. When the concentration is reached, the pump 15 is stopped. Thus, since the dialysis stock solution adjusted to a predetermined concentration is stored in the dissolution tank 13, the electromagnetic valve 16 is opened and the dialysis stock solution is dropped and stored on the storage tank 14 side. Can do.

  After the pump 15 is stopped, the pressing of the negative pressure generating means 12 and the pressing means 19 is stopped and the close-contact operation and the pressing operation with respect to the bag body H are released. The bag body H is taken out from the contact means 7. Then, the unsealed bag body H to be sent next by the bag body conveying device 1 is placed on the contact means 7, and the same operation as described above is performed.

  According to the above embodiment, the bag body H is opened by the opening means (blade 10) in the closed space S formed by the close contact means 7 contacting the outer surface of the bag body H. It is possible to prevent contamination of germs from the unsealed portion of the container, and to prevent scattering to the surroundings, thereby avoiding deterioration of the working environment. In addition, since the contact means 7 adheres by sucking the outer surface of the bag H with a negative pressure, the contact with the outer surface can be more reliably performed, and the contents can be easily adhered after the contents are taken out. Can be released.

  Furthermore, since the closed space S is communicated with the dissolution tank 13 for mixing the content taken out from the bag H with water and dissolving it, the opening operation, the content taking-out operation, and the content dissolution It is possible to automatically perform a series of operations such as a charging operation into the tank. Furthermore, in the state where the bag body H is opened with the cutting tool 10, water is circulated in the tubular member 8 (flow path 8a) to eject water from the distal end of the tubular member 8, and the contents in the bag body H Is allowed to flow out into the closed space S, so that the contents can be taken out more reliably and the dissolution of the contents can be promoted.

Next, a reference example will be described.
The bag opening device according to the reference example, similarly to the implementation form, intended for opening a bag containing a dialysis agent supplied to the dialysis machine, as shown in FIG. 10, the contact means 7, It is mainly composed of an opening means composed of a cutting tool 20 and an arm portion 22 and the like, and a pressing means 19. Incidentally, the same reference numerals are given to the same components as the implementation form thereof is omitted the detailed description.

  The cutting tool 20 can be opened by tearing the outer surface (lower surface) of the bag body H, and can be configured to swing between a standby position indicated by a solid line in the drawing and an opening position indicated by a two-dot chain line. Has been. In other words, the cutting tool 20 is formed at the tip of the arm portion 22 that can be swung around the swinging axis C when driven by the driving means 21, and swings between the standby position and the opening position when driven by the driving means 21. The bag body H is opened at the opening position, and the contents (medicine for dialysis) can be dropped. A reversible motor or the like can be used as the driving unit 21.

  On the other hand, the closed space in the contact means 7 is formed in the upper part of the dissolution tank 13 and connected to the dissolution tank 13, and the opening means as described above is also provided in the upper part of the dissolution tank 13. Therefore, if a predetermined amount of water (a volume of water to dissolve the dialysis drug contained in one bag body H) is stored in the dissolution tank 13 and the bag body H is opened, the contents ( The dialysis drug) falls and mixes with water. Therefore, if the mixture is stirred with a stirring means (not shown), the concentration can be made substantially uniform, and a dialysis stock solution having a predetermined concentration can be obtained.

  Here, in the case where the contents are powdery, in addition to pressing by the pressing means 19, the bag H is given a movement that squeezes against the side surface of the bag H, and the bag H is given vibration. It is preferable to cause the body H to perform a swinging motion or the like. When applying vibration or swinging motion, a bellows-like elastic member is interposed between the close contact means 7 and the dissolution tank 13 to support the close contact means 7, and vibration and swing operations are performed. You may comprise so that it may be easy.

According to the reference example , the contents (dialysis drug) can be dropped into the dissolution tank 13 by opening the lower surface of the bag body H with the cutting tool 20, so that the contents in the bag body H can be quickly and smoothly removed. It can be put into the dissolution tank 13. Further, if the blade 20 is swung to the standby position immediately after opening the bag body H, it is possible to avoid the problem that the blade 20 prevents the contents from falling.

Having described the present embodiment, the present invention is not limited to being this, for example, such as the shape of FIG. 11 the bag H (sealing portion H1a, with H1b are respectively formed on opposite sides, contact means 7 A bag body H1 having a shape in which the outer surface (lower surface) to which the contact is made is substantially flat) or a shape as shown in FIG. 12 (sealing portion H2a is formed on the upper portion and the outer surface (lower surface) to which the contact means is in contact is formed. It is good also as the bag body H2 of the shape made into substantially flat. If these bags are used, at least the outer surface to which the contact means 7 is in close contact is substantially flat, so that the contact by the contact means 7 can be easily and reliably performed.

  Further, as shown in FIG. 13, for the purpose of turning the bag body H upside down after the close contact by the contact means 24, the auxiliary suction means 23 including an air pad or the like that applies a negative pressure to the outer surface of the bag body H to suck it. May be included. According to this configuration, the suction by the close contact means 24 and the suction by the auxiliary suction means 23 can be performed simultaneously with the close contact, so that the upside down can be easily and reliably performed, and then the opening means (as in the above embodiment). Can be opened with a cutting tool or the like moving in the closed space.

If the bag is opened upside down, the upper surface of the bag is opened with a blade or the like, and the following effects are obtained. In other words, when the contents are powdery, the contents are unevenly distributed under the bag due to gravity. Therefore, if the upper surface is opened, the cutting tool can be prevented from piercing the contents and only the bag is cut. Can be opened. Once opened, when supplying such water implementation form can be put into left dissolution tank upside down when dropping the such contents of the reference example directly dissolver, it is necessary to further upside down is there.

  In addition, it is preferable to comprise so that the surface on the opposite side to the surface to which the contact | adherence means 24 in the bag body H closely_contact | adheres may be pressed by the press means 19 (refer FIG. 13) like the said embodiment. In this case, it is possible to assist the suction of the contact means 24 and the auxiliary suction means 23 by pressing, and also function as a support for the bag body H at the time of upside down. Further, in order to increase the adhesion force (suction force by negative pressure) to the bag body H by the adhesion means 24, a plurality of grooves 24b connected to the negative pressure generation means 12 are concentrically formed as shown in FIGS. (Three in the figure) may be formed.

  Furthermore, in this embodiment, the bag transport apparatus 1 moves a plurality of mounting means by a chain or a belt and transports it to the take-out position. A general-purpose transport device may be used. When it is not necessary to store the bag body by the bag body transfer device 1, the operator may place the bag body directly on the contact means 7. The contents stored in the bag H may be in the form of powder or liquid instead of the dialysis drug as in this embodiment.

A close contact means for covering a part of the outer surface of the bag body to form a closed space separated from the outside; and a closed space formed by the close contact means contacting the outer surface of the bag body. An opening means for opening the bag body, and a closed space for dissolving the contents taken out from the bag body with water through a pipe connected to the bottom surface side of the contact means If it is a bag opening device that communicates with the dissolution tank and can dissolve the contents in the bag body by circulating water between the dissolution tank and the bag body and the closed space, the outer shape The present invention can also be applied to those having different functions or those having other functions added.

The block diagram which shows the bag body opening apparatus which concerns on embodiment ( embodiment and common reference example ) of this invention, a bag body conveying apparatus, and the melting | dissolving apparatus applied to it (A) Top view (b) Front view for showing the bag body conveying apparatus which concerns on embodiment of this invention The perspective view which shows the mounting means in the bag body conveying apparatus Schematic view showing the bag opening device and dissolution apparatus in the implementation of the invention Top view showing contact means in the bag opening device Cross-sectional schematic diagram showing the contact means Exploded perspective view showing the opening means in the bag opening device Front view showing the opening means Whole sectional view showing the bag body opening device Schematic showing the bag opening device and dissolution device in the reference example The perspective view which shows the bag body of the other form which can be applied by this invention The perspective view which shows the bag of another form which can be applied by this invention. Schematic view of another embodiment in which the contact means in the present invention is turned upside down. The top view which shows the state which formed the several groove | channel in the contact | adherence means in the other embodiment Cross-sectional schematic diagram showing the contact means formed with the plurality of grooves

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Bag body conveying apparatus 2 Bag body opening apparatus 3 Dissolving apparatus 4 Mounting means 4b Mounting surface 4c Recessed part 5 Chain 6 Taking-out means 7, 24 Contact means 7a Contact surface 7b Groove 8 Tubular member (opening means)
9 Drive means (opening means)
10 (10a, 10b) Cutting tool (opening means)
DESCRIPTION OF SYMBOLS 11 Seal member 12 Negative pressure generation means 13 Dissolution tank 14 Storage tank 15 Pump 16 Solenoid valve 17 Air filter 18 Water supply source 19 Press means 20 Cutting tool (opening means)
21 Drive means 22 Arm 23 Auxiliary suction means H, H1, H2 Bag S S Closed space

Claims (5)

In a bag opening device for opening a bag containing powdered or liquid contents and taking out the contents in the bag outside,
A close contact means for covering the part of the outer surface of the bag body and forming a closed space that is in close contact with and separated from the outside;
An unsealing means for unsealing the bag body in a closed space formed by the close contact means being in close contact with the outer surface of the bag body;
And the closed space is communicated with a dissolution tank for mixing and dissolving the contents taken out from the bag body with water via a pipe connected to the bottom surface side of the contact means , A bag opening device characterized in that the contents in the bag can be dissolved and accommodated in the dissolution tank by circulating water between the dissolution tank, the bag, and the closed space.   2. The bag opening device according to claim 1, wherein the contact means makes contact by sucking the outer surface of the bag with a negative pressure.   The bag opening device according to claim 1 or 2, further comprising a pressing unit capable of pressing a surface opposite to a surface of the bag body on which the contact unit is in close contact. The opening means is
A tubular member capable of circulating water therein;
A cutting tool formed at the tip of the tubular member and capable of tearing and opening the bag body;
Drive means capable of moving the blade from the standby position to the opening position of the bag;
In the state where the bag body is opened with the cutting tool, water is ejected from the distal end of the tubular member by flowing water in the tubular member, and the contents in the bag body are discharged into the closed space. The bag opening apparatus according to any one of claims 1 to 3. The bag body opening device according to any one of claims 1 to 4, wherein the bag body has at least an outer surface to which the contact means is in close contact.

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