JP2013249122A - Cock type spout plug - Google Patents

Abstract

PROBLEM TO BE SOLVED: To produce no large deformation in a reverse direction to opening direction even when a gap between a pilfer-proof ring assembled to a cock type spout plug and an outer cylinder of a spout plug is large and a blade of a ring is brought into contact with a projection by turning in a plug opening direction, appropriately ensure engagement to the projection and prevent leakage of a liquid from a cock type spout stopper while storing and managing a bag-in-box filled with a content.SOLUTION: A projection 38 to which a blade 34 of a pilfer-proof ring 32 moving during opening a spout plug is brought into contact with is provided to the outer peripheral surface of an outer cylinder 3, and a blade deformation preventive means 39 is provided to regulate the deformation of the blade 34 which is brought into contact with the projection 38 and to keep the engaging condition between the projection 38 and blade 34.

Description

  The present invention is a pouring tool for a liquid packaging container such as a bag-in-box having an inner bag attached with a spout as a spout portion, and is attached to the spout portion and accommodated in the inner bag It is related with the cock type spout stopper which pours out the liquid of or stops the pour-out.

  2. Description of the Related Art Liquid packaging containers called bag-in-box are known as containers for storing liquid seasonings, water, alcohol and other liquids used for business purposes, and various chemical solutions. This bag-in-box generally has a structure in which an easily deformable inner bag made of a synthetic resin flexible sheet is put in a corrugated cardboard outer box, and the inner bag containing liquid is made of a synthetic resin. A member called an annular spout is provided as a spout part, and this is closed with a cap.

  Furthermore, many bag-in-box type liquid packaging containers in which a cock-type spout stopper is attached in advance to the spout section have been distributed. This container opens the required part of the outer box, pulls out the cock type spout stopper together with the spout, fixes the spout to that part, and positions the cock type spout stopper on the outer surface of the outer box. The contents can be easily poured out by standing and opening and closing the cock-type outlet plug.

  Various types of cock-type spout taps have been proposed. As one of them, the cock type spout stopper shown in Patent Document 1 is designed to be compact. This includes a fitting plate portion that is fitted to the spout portion of the liquid packaging container, a cylindrical body portion that is supported by the fitting plate portion and is parallel to the plate surface direction of the fitting plate portion, and the cylindrical portion. A cap-like rotating portion that covers the upper end opening of the cylindrical body portion and is screwed onto the outer peripheral surface of the cylindrical body portion, and a blank that is fitted into the cylinder of the cylindrical body portion and is fitted to the lower inner surface of the top plate portion of the cap-like rotating portion. It consists of a jar part. And there is an opening in the cylinder wall on the lower end opening side of the fitting plate part and the cylinder part, and the flow path of the fitting plate part and the inside of the cylinder part are communicated with each other through this opening, and the cap-shaped rotating part is By screwing and rotating, the cap-shaped rotating part itself moves up and down, and accordingly, the plunger part is moved up and down to open and close the lower end opening of the cylindrical part.

  There is a cock type spout stopper shown in Patent Document 2 for the purpose of not causing loosening of the cause of liquid leakage. This cock-type spout plug has a cylindrical cock body having an inlet on the side and a discharge port on the lower part, a handle that is rotatably fitted in the upper end opening of the cylindrical part of the cock body, And a plunger that moves up and down in the cylindrical portion by rotation of the handle at a fixed height position to open and close the content flow path of the cock body. And the engagement provided at the upper end of the outer wall surface of the cylindrical part of the cock body when the discharge port is closed so that the trouble that the handle rotates in the loosening direction during transportation and storage and the liquid is discharged does not occur The stopper and the protrusion provided at the lower end portion of the outer wall surface of the handle are engaged with each other.

  Patent Document 3 discloses a cock-type spout stopper for the purpose of more reliably preventing liquid leakage at a closed discharge port, and has substantially the same structure as that of Patent Document 2. In this cock-type spout stopper, at the closed position of the content flow path of the cock body, the bulging part provided around the lower end of the plunger descends over the inner peripheral surface of the outlet of the cock body. In this way, the discharge port is closed to prevent liquid leakage. Even in this Patent Document 3, when the discharge port is closed, the handle is provided on the outer wall surface of the cylindrical portion of the cock body so as not to cause a problem that the handle rotates in the loosening direction during transportation / storage. The stopper and the protrusion provided on the lower end of the outer wall surface of the handle are engaged with each other.

  Similarly, there is a cock-type spout stopper shown in Patent Document 4 for the purpose of preventing a cock from being insufficiently closed due to an external impact during distribution and storage processes. This cock-type spout plug is composed of a spout body consisting of a vertical spout tube and a horizontal connecting tube that is connected to and communicates with a side surface at a predetermined position of the spout tube. An external screw to which the open / close cap is screwed is provided, and an open / close cap having an internal screw to be screwed to the external screw is screwed to the top of the dispensing cylinder. An open / close cylinder slidably contacting the inner peripheral surface is vertically suspended, and the open / close cylinder moves up and down together with the open / close cap by screwing the open / close cap to open and close the liquid flow path from the connection cylinder to the dispensing cylinder. This cock-type spout cap is provided with a protrusion to prevent the cap from rotating on the outer screw of the dispensing cylinder in order to prevent the cap from rotating in the loosening direction due to external impacts during distribution and storage. Thus, the inner screw of the opening / closing cap is brought into sliding contact with the return preventing projection.

  Regarding the cock-type spout stopper, as described above, various measures have been proposed as a countermeasure for preventing liquid leakage by suppressing rotation of the cap in the loosening direction (opening direction) during distribution and storage. In the case where the protrusion provided on the handle side rotating at a fixed height position and the engagement stopper on the cock body side are detachably engaged, the shape of the protrusion and the engagement stopper becomes complicated, and the handle and cock body It becomes difficult to mold. In addition, each of the above-described devices includes the cock type even after the start of use of the liquid packaging container, including the device in which a protrusion for preventing return is provided on the outer screw of the extraction tube to which the inner screw portion of the cap is screwed. Each time the spout plug is closed, the protrusion and the engagement stopper are engaged, and the inner screw is engaged with the return protrusion of the outer screw, which causes a problem that the tightening operation of the handle and the cap becomes heavy. .

  With regard to the cock type spout stopper that the cap is screwed and rotated up and down, a pilfer proof ring (see, for example, Patent Document 5) assembled to the cap of the PET bottle is provided on the cap of the cock type spout stopper. It is conceivable to prevent inadvertent rotation of the cap (rotation in the loosening direction). That is, the pilfer proof ring plays a role of locking the outer cylinder so that it cannot be rotated when it is rotated in the opening rotation direction. It is thought that it is useful in suppressing the prepared rotation, and after the cap and the pilfer proof ring are separated, the function of the rotation suppression of the pilfer proof ring does not extend to the cap. The use of rings was being considered.

JP 2009-214911 A Japanese Utility Model Publication No. 06-076096 Japanese Utility Model Publication No. 05-0707048 JP 2005-015443 A Japanese Utility Model Publication No. 07-021556

  However, as shown below, when the pill fur proof ring is provided at the lower part of the cap of the cock type spout stopper, the distance between the inner peripheral surface of the pill fur proof ring and the outer peripheral surface of the outer cylindrical body that is the cock body is large. It has become. For this reason, when the blade on the inside of the pilfer proof ring comes into contact with the protrusion on the outer peripheral surface of the outer cylinder, a large deformation of the blade is allowed, and the function of preventing rotation of the pilfer proof ring works. Absent. Even when the pilfer proof ring is used in this way, the cap is inadvertently rotated and the plunger or the inner cylinder moves upward to open the flow path, so that the liquid from the outlet side of the cock body can be opened. There is a problem that leakage cannot be prevented.

(Pill fur proof ring of plastic bottle)
In order to explain the point that the distance between the pill fur proof ring and the outer cylinder when the pill fur proof ring is arranged in the cock type spout stopper, first, the pill fur proof ring of the PET bottle will be explained. FIG. 15 schematically shows a state in which the cap b is screwed to the mouth portion a of the plastic bottle, and the mouth portion a is covered and closed with the cap b. A pilfer proof ring c is connected to the lower end of the cap b via a connecting portion. FIG. 16 schematically shows a cross section of the mouth portion of the plastic bottle at the position where the pilfer proof ring c is arranged. Plural blades d having flexibility at regular intervals are provided on the inner peripheral surface of the pilfer proof ring c, and the inclination occurs from the opening rotation direction toward the ring center side.

  Plural protrusions e are provided at equal intervals on the outer peripheral surface of the cylindrical wall of the mouth part a to which the pilfer proof ring c corresponds, and these protrusions e are convex outward in the mouth radial direction. . As is known in the art, when the cap b molded with the pilfer proof ring c is first screwed into the mouth portion a, the pilfer proof ring c is rotated in the closing rotation direction. Move down. Then, when the pilfer proof ring c descends and reaches the projection a of the mouth portion a while rotating to a certain height position, each of the blades d approaching the projection e is deformed into a flat shape and gets over the projection e. Pass through and then revert to the normal raised shape. In FIG. 15 and the following FIG. 17, the blades d and the protrusions e are not shown for ease of explanation.

  FIG. 17 shows a state where the cap b screwed to the mouth portion a of the PET bottle is turned in the opening rotation direction, the connecting portion (not shown) is cut, and the cap b and the pilfer proof ring c are separated. When the cap b is rotated in the opening rotation direction, the cap b rotates while moving upward, but the pilfer proof ring c that rotates in the same direction along with the cap b is, as shown in FIG. The blade e does not rotate because it is locked to the protrusion e on the mouth portion a side. Therefore, the connecting part that connects the cap b and the pilfer proof ring c is cut, and only the cap b rotates in the opening rotation direction and moves upward, so that the opening of the plastic bottle can be opened.

  As described above, the distance between the outer peripheral surface of the cylindrical wall of the mouth portion and the inner peripheral surface of the pill fur proof ring is such that each blade e of the pilfer proof ring c is deformed when the cap b is first attached to the mouth portion a. The size of the plastic bottle is not limited as long as the protrusion e can be overcome. In the case of this plastic bottle, the outer peripheral surface of the cylindrical wall of the mouth portion and the inner peripheral surface of the pilfer proof ring are in close proximity. When the blade d and the protrusion e are engaged with each other at the opening of the mouth a, the blade d itself is slightly deformed to rise toward the center of the ring. The deformation does not increase due to contact. Thus, the engagement between the blades d and the protrusions e is properly maintained.

  In the mechanism of separating the cap and the pill fur proof ring that is performed when opening the mouth portion of the PET bottle, a protrusion is integrally formed around the outer peripheral surface of the cylindrical wall of the mouth portion. In some cases, each of the blades of the fur proof ring is locked to the lower surface of the protrusion, thereby stopping the rotation and upward movement of the ring to separate the cap from the pill fur proof ring. Even in this configuration, the distance X between the outer peripheral surface of the cylindrical wall of the mouth and the inner peripheral surface of the pilfer proof ring is small.

(Cock-type spout tap)
FIG. 19 shows the cross-sectional shape of the cock-type spout stopper studied above in a simplified but extreme manner. As shown in FIG. 19, the cock-type spout stopper basically has a cock main body g and a cap h having a mounting body (the fitting plate portion, a horizontal connecting tube, etc.) f to be attached to the spout portion of the liquid packaging container. (The cap-shaped rotating part, the opening / closing cap, etc.) and the inner cylinder i (the plunger part, the opening / closing cylinder, etc.). Each of the cock body g, the cap h, and the inner cylinder i is a synthetic resin molded product. is there. The outer cylindrical body j of the cock body g can be removed without any trouble during molding so that the inner peripheral surface is not damaged, and the wedge effect of the inner cylindrical body i is utilized to be watertight. In order to achieve this, the outer cylindrical body j has a substantially tapered shape in which the inner diameter is reduced as it is lowered downward, and the overall shape tapers downward. On the other hand, the cap h that is screwed onto the external screw provided on the outer peripheral surface at the upper part of the outer cylindrical body j has a shape in which the peripheral wall k hangs downward without being inclined due to the penetration of the mold at the time of cap molding. Yes, when the pilfer proof ring c is connected, it is located on the extension line below the peripheral wall k.

  While the pilfer proof ring c is located at the lower part of the peripheral wall of the cap, the shape of the outer cylinder body is substantially tapered and tapered downward for the reasons described above. Compared with the distance between the pill fur proof ring and the bottle mouth portion, the distance Y between the pill fur proof ring and the ring-corresponding portion of the outer cylindrical body at the cock type spout stopper becomes larger.

  Since the gap between the pilfer proof ring and the ring-corresponding portion of the outer cylinder (space B) is widened, the following description will be given for initial opening (when opening) with a cock type spout plug with a pilfer proof ring. Inconvenience is likely to occur. FIG. 20 schematically shows a cross section at the position where the pilfer proof ring is arranged. As in the case where the combination of the mouth portion of the plastic bottle and the cap screwed on the same is shown, the screw connecting the cap and the outer cylinder is omitted for ease of explanation. Further, the cap and the inner cylinder are connected in a state where relative axial rotation is possible.

  In the state where the cap h with pilfer proof is attached to the outer cylindrical body j of the cock body g (when not opened), the gap between the pilfer proof ring c and the outer cylindrical body j has blades d and protrusions e. Each of the plurality of blades d arranged at regular intervals over the inner peripheral surface of the pilfer proof ring c exhibits an inclination generated from the opening rotation direction A toward the outer cylindrical body, and the tip thereof is in the opening rotation direction A. Along. As described above, when the cap h is rotated in the opening rotation direction, the blade d comes into contact with the protrusion e provided on the outer peripheral surface of the outer cylindrical body j.

  When the blade d of the pilfer proof ring c comes into contact with the protrusion e, the blade d is deformed. However, since the gap between the pilfer proof ring c and the outer cylindrical body j is wide, the blade d is freely deformed, 21 and FIG. 22, a deformation that bends so that the blade d turns in the closing rotation direction occurs, and in this bent state, the blade d moves relatively so as to get over the protrusion e. Then, the pilfer proof ring c rotates together with the cap h in the opening rotation direction and is not separated from the cap h, but moves upward together with the cap h as shown in FIG.

  In view of the above, the pilfer proof ring does not have a function to stop the rotation in the opening direction of rotation or the effect is extremely low, and the cap is opened when storing and managing the bag-in-box described above. If an inadvertent external force is applied to rotate the stopper in the direction of rotation, the rotation may not be suppressed. That is, with the configuration in which the pilfer proof ring is simply assembled, the risk of liquid leakage from the cock type spout stopper cannot be solved.

  Therefore, in view of the above circumstances, the present invention relates to a cock-type spout plug that is attached to a spout portion of a bag-in-box, even when the gap between the pill fur proof ring and the outer cylinder is large, Storage of a bag-in-box filled with contents, with the objective of ensuring that the blade does not deform greatly in the opposite direction even if the blade contacts the protrusion due to rotation in the direction, and is properly locked to the protrusion The purpose is to prevent liquid leakage from the cock-type spout stopper during management.

The present invention has been made in consideration of the above problems, and a conduit provided in a mounting body that fits into a spout part of a liquid packaging container is made to be continuous with an inflow port of an opening in a cylindrical wall of an outer cylindrical body. A cock body, a cap screwed on the upper part of the outer cylinder body of the cock body, and vertically movable by screwing rotation, and fitted into the outer cylinder body of the cock body, An inner cylindrical body that is movable up and down with the vertical movement, and a liquid flow path is formed from the pipe line of the mounting body to the opening at the lower end of the outer cylindrical body through the inlet. ,
The inner cylinder moves upward with the cap moving while rotating, opens the liquid flow path to allow the liquid to flow out, and the inner cylinder moves with the cap moving downward while rotating. In the cock-type spout plug that is capable of moving downward and closing the liquid flow path to stop the outflow of liquid,
The lower part of the cap is positioned so as to correspond to the outer peripheral surface of the outer cylindrical body, and a pilfer proof ring having a plurality of blades on the inner peripheral surface is connected in a separable manner via an easily breakable connecting portion,
On the outer peripheral surface of the outer cylindrical body, there is provided a protrusion with which the blade of the pilfer proof ring that moves when the cap is opened, and the deformation of the blade in contact with the protrusion is restricted, and the protrusion and the protrusion are in contact with each other. The present invention provides a cock-type spout stopper characterized in that a blade deformation stopping means for maintaining the engaged state with the blade is provided to solve the above-mentioned problems.

  In the present invention, the blade deformation preventing means is a flange-like member projecting outward from the outer peripheral surface of the outer cylindrical body so as to be close to or in contact with the blade, and between the protrusions in the circumferential direction of the outer cylindrical body. It is preferable to be provided over the entire area.

  According to the present invention, even when the pill fur proof ring is moved in the opening rotation direction due to vibrations applied to the cock type spout stopper or other objects colliding with the bag-in-box storage, etc. The locking state is maintained without the blades coming into contact with the protrusions of the outer cylindrical body being greatly deformed by the stopping means. Therefore, the flow path is not opened and liquid leakage can be reliably prevented.

  This effect will be described with reference to FIGS. FIG. 24 schematically shows a state in which the cap h is moved upward after the initial opening, and the pilfer proof ring c is not moved upward but remains in a predetermined position. FIG. 14 schematically shows a state in which the rotation of the pilfer proof ring c in the opening rotation direction is restricted by a cross section at the position of the pilfer proof ring c.

  When the cap h is rotated in the opening rotation direction A during opening, the pilfer proof ring c is also rotated in the opening rotation direction A. The wing d of the pilfer proof ring c starts to be deformed such that it rises by coming into contact with the protrusion e protruding on the outer peripheral surface of the outer cylindrical body j. However, as shown in FIG. 14, since the blade deformation preventing means l is provided on the outer peripheral surface of the outer cylindrical body j, the blade d immediately contacts the blade deformation preventing means l and the blade d itself Deformation is regulated. By maintaining the locked state between the blades d and the protrusions e, the pilfer proof ring c does not rotate in the opening rotation direction, and the pilfer proof ring c is separated from the cap h that rotates in the opening rotation direction. .

  When the opening operation is performed, the cap and the pilfer proof ring are separated as described above. In addition, even if vibration or impact is applied that causes the cap to rotate in the opening rotation direction when the bag-in-box is stored and managed and the cock-type spout stopper is not opened, As shown in FIG. 14, the locked state between the blade and the projection is maintained, and the rotation of the pilfer proof ring itself in the opening rotation direction is restricted. Therefore, liquid leakage from the cock-type spout stopper is reliably prevented during storage and management of the bag-in-box.

  Further, according to the present invention, the blade deformation preventing means is a flange shape projecting outward from the outer peripheral surface of the outer cylindrical body, and is provided between the projections in the circumferential direction of the outer cylindrical body, so that the outer portion of the cock body is molded. Sinking does not occur on the inner surface of the cylinder, and liquid leakage due to molding failure can be prevented.

It is explanatory drawing shown in the state which looked at embodiment of the cock type spout stopper which concerns on this invention from the front side. It is explanatory drawing shown in the state which looked at embodiment from the side. It is explanatory drawing shown in the state which looked at embodiment from the other side. It is explanatory drawing which shows embodiment by a perspective view. It is explanatory drawing which shows a closed state in a longitudinal cross section. It is explanatory drawing which shows an open state in a longitudinal cross section. It is explanatory drawing shown in the state which looked at the cock main body in embodiment from the side surface. It is explanatory drawing shown in the state which looked at the cock main body from the stopper front side similarly. It is explanatory drawing shown in the state which looked at the protrusion and outer blade | wing deformation | transformation stop means of an outer cylinder body from upper direction. An inner cylinder is shown, (a) is explanatory drawing shown in the state seen from upper direction, (b) is explanatory drawing which shows the state seen from the side. It is explanatory drawing which shows the inside of a cap with a longitudinal cross section. It is explanatory drawing shown in the state which looked at the pilfer proof ring connected with the cap from the downward direction. It is explanatory drawing which shows the protrusion which the pilfer proof ring and the blade | wing of a ring contact | abut. It is explanatory drawing which shows roughly the state in which rotation to the opening rotation direction of a pilfer proof ring is controlled in a cross section. It is explanatory drawing which shows the state by which the opening part of the PET bottle is closed with the cap with a pilfer proof ring. It is explanatory drawing which shows schematically the cross section in the position where the pill fur proof ring of the PET bottle was arranged. It is explanatory drawing which shows the state which the cap and the pilfer proof ring isolate | separated in the opening part of the PET bottle. It is explanatory drawing which shows the state by which the blade | wing of the pilfer proof ring distribute | arranged to the opening | mouth part of a PET bottle was latched by the protrusion, and rotation of the ring was controlled. It is explanatory drawing which simplifies and shows the longitudinal cross-sectional shape of a cock type spout stopper. It is explanatory drawing which shows schematically the cross section in the position where the pilfer proof ring of the cock type spout stopper was arranged. It is explanatory drawing which shows the state which the blade | wing of the pilfer proof ring latched on the protrusion, and changed. It is explanatory drawing which shows the state which the blade | wing of the pilfer proof ring similarly latched on the protrusion, and changed. It is explanatory drawing which shows the state which the cap moved upwards with the pilfer proof ring. It is explanatory drawing which shows the state which opened the cock type spout stopper.

  Next, the present invention will be described in detail based on the embodiment shown in FIGS. In the figure, 1 is a cock-type spout stopper according to the present invention, and the cock-type spout stopper 1 is an outer cylinder attached to a mounting body 2 that fits into a spout portion (spout) of a liquid packaging container such as a bag-in-box. A cock body 4 in which the body 3 is integrated, a cap 6 that covers the upper end opening 5 of the outer cylinder 3 and is screwed to the outer peripheral surface on the upper side of the outer cylinder 3, and an upper and lower sides inside the outer cylinder 3 An inner cylinder 8 that is arranged so as to be movable and that moves upward and downward as the cap 6 is vertically moved (moved up and down by screwing rotation) by fitting the upper portion into the connecting space portion 7 in the cap. Is provided. The cock main body 4, the cap 6 and the inner cylindrical body 7 constituting the cock type spout stopper 1 are each formed of a synthetic resin material.

(Cock body)
As shown in the cross section of FIG. 5, in the cock main body 4, the mounting body 2 supports the outer cylindrical body 3, and the outer cylindrical body 3 is not connected to the plate surface of the mounting body 2. The direction of the central axis is parallel. Further, the pipe line 9 protruding from the plate surface of the mounting body 2 is continuous with the inlet 10 of the opening on the lower side of the cylindrical wall of the outer cylindrical body 3, and the inlet 10 extends from the pipe line 9 of the mounting body 2. The liquid flow path over the lower end opening part 11 (outlet) of the outer cylinder 3 is formed.

  As shown in FIG. 5 and FIG. 6 representing the longitudinal cross section of the plug, the outer cylindrical body 3 has a small diameter opening at the lower end opening portion 11 with respect to the opening at the upper end opening portion 5. Moreover, the outer thread part 12 exists in the cylinder wall outer peripheral surface of the outer cylinder upper part side (refer FIG. 7, FIG. 8). On the other hand, as shown in the longitudinal section, the middle position is set as the slidable contact surface portion 13 inside the outer cylindrical body 3. Above that, a diameter-enlarged portion 15 having an increased inner diameter is continuous via a stepped portion 14, and a convex portion 16 is provided over the inner periphery at the height position of the upper end opening 5. A second stepped portion 17 is provided on the lower edge side of the sliding contact surface portion 13, and a small diameter portion 18 having a smaller inner diameter as a portion including the region of the inlet 10 is provided below the second stepped portion 17. The lower end opening 11 having a longitudinal cross-sectional shape that is stepped and having a smaller inner diameter is located below the small-diameter portion 18.

(Inner cylinder)
FIG. 10A and FIG. 10B show the top and side surfaces of the inner cylinder 8. The inner cylindrical body 8 has a shaft portion 19 having a diameter corresponding to the sliding contact surface portion 13 of the outer cylindrical body 3, and a convex portion 20 is provided over the outer periphery of the inner cylindrical body 8 on the upper edge side. The lower limit position of the inner cylinder 8 is set by the portion 20 coming into contact with the stepped portion 14 of the outer cylinder 3. A locking ring 21 that protrudes outward in the circumferential direction is provided at the upper end portion of the inner cylindrical body 8. Further, a height 22 on the proximal end side of the locking ring 21 has a convex portion 22 over the circumferential direction of the inner cylinder 8, and the convex portion 22 is inside the upper end opening 5 of the outer cylindrical body 3. This is a portion that is detachably locked to the convex portion 16, and is a portion that moves over the convex portion 16 and moves upward of the outer cylindrical body 3 when the inner cylindrical body 8 moves upward.

  At the lower edge position of the shaft portion 19 of the inner cylindrical body 8, a sliding portion 23 is located in the circumferential direction, and the position of the sliding portion 23 is slightly larger in diameter than the shaft portion 19. The sliding portion 23 is always in contact with the slidable contact surface portion 13 so as to be slidable, including when the inner cylinder 8 moves up and down in the outer cylinder 3, and is watertight so as not to leak upward. It is a part to secure. The portion below the sliding portion 23 is a region corresponding to the small diameter portion 18 of the outer cylindrical body 3 when the inner cylindrical body 8 descends to the lower limit position, and has an outer diameter smaller than that of the shaft portion 19. There is an inlet corresponding portion 24 that tapers downward slightly toward the bottom. In a state where the inner cylindrical body 8 is lowered to the lower limit position, the inner peripheral surface of the small diameter portion 18 of the outer cylindrical body 3 and the outer peripheral surface of the inflow port corresponding portion 24 do not contact each other. That is, the shape of the outer surface of the inlet corresponding portion 24 is slightly narrower than the shape of the inner peripheral surface of the small diameter portion 18 of the outer cylinder 3.

  As described above, the portion corresponding to the lower opening 11 of the outer cylindrical body 3 and the portion corresponding to the small diameter stepwise from the height position slightly above the lower opening 11 are the inlet corresponding portions of the inner cylindrical body 8. The inner cylinder lower end 25 extending from below 24 to the lowest end can be fitted. The inner cylinder lower end 25 serves as a second sliding portion, and the inner cylinder lower end 25 is fitted into the lower end opening 11 of the outer cylinder 3 so that the inner cylinder lower end 25 and the inner end of the outer cylinder 3 It is provided so as to be watertight between the lower end portion 25 of the cylinder. That is, the liquid channel is closed when the inner cylinder 8 is lowered to the lower limit position.

(cap)
The cap 6 is provided with an inner screw portion 28 that is screwed into the outer screw portion of the outer cylindrical body 3 on the inner peripheral surface of the peripheral wall 27 continuous around the top plate portion 26 (FIG. 11). Further, by attaching the upper part of the inner cylindrical body 8 to the connecting space part 7 so that the locking ring 21 at the upper part of the inner cylindrical body 8 enters the connecting space part 7 on the lower surface side of the top plate part 26. The ring 30 that hangs down from the lower surface of the top plate portion 26 enters the inside of the rib integrated with the locking ring 21 of the inner cylinder body 8, and the convex portion 31 formed on the inner peripheral surface of the peripheral wall 27 of the cap 6 forms the inner cylinder. The locking ring 21 of the body 8 is engaged, and the cap 6 and the inner cylinder 8 are connected. Then, the cap 6 is put on the upper portion of the outer cylindrical body 3 in a state where the inner cylindrical body 8 is arranged inside the outer cylindrical body 3, and the inner screw portion 28 of the cap 6 and the outer screw portion 12 of the outer cylindrical body 3. Are screwed together.

  As described above, the cap 6 is screwed onto the upper portion of the outer cylindrical body 3, and the inner cylindrical body 8 disposed inside the outer cylindrical body 3 is connected to the cap 6. 1, the inner cylinder 8 moves upward with the cap 6 moving upward while rotating, and the inner cylinder lower end 25 of the inner cylinder 8 moves away from the lower end opening 11 of the outer cylinder 3. As a result, the liquid channel is opened to allow the liquid to flow out, and the inner cylinder 8 moves downward along with the cap 6 that moves downward while rotating. When the inner cylinder lower end 25 is fitted into the lower end opening 11 of the outer cylinder 3, the liquid channel is closed to stop the liquid from flowing out.

  In the present embodiment, the cock-type spout attached to the inner bag of the bag-in-box in an environment in which the bag-in-box filled with contents and unused is stored and managed. A measure is provided to prevent the cap from rotating in the opening rotation direction even when vibration or impact is applied to the stopper 1.

(Bill Far Proof Ring)
As shown in FIGS. 11 and 12, an annular pill fur proof ring 32 is separably connected to the lower portion of the peripheral wall 27 of the cap 6, and the pill fur proof ring is in an unopened state. Reference numeral 32 denotes an arrangement in which the inner surface surrounds a portion of the cylindrical wall that is the sliding contact surface portion 13. The corresponding portion of the outer cylinder 3 that is surrounded by the pilfer proof ring 32 has a smaller diameter than the upper part of the outer cylinder 3 to which the cap 6 is screwed. In some cases, the corresponding portion is formed so as to become thinner. The On the other hand, since the bill fur proof ring 32 itself is connected to the lower part of the peripheral wall 27 of the cap 6, there is no pet between the bill fur proof ring 32 and the cylindrical wall surrounded by the pill fur proof ring 32. It is wider than between the bottle pill fur proof ring and the mouth of the plastic bottle. Therefore, when opening the cock type spout 1, the pill fur proof ring 32 connected to the cap 6 is prevented from rotating in the opening rotation direction as follows.

  First, the pilfer proof ring 32 is a plurality of flexible blades inclined on the inner peripheral surface of the inverted L-shaped ring main body 33 so that the tip end side thereof is along the opening rotation direction. 34 are provided integrally with a predetermined interval (see FIG. 12). In addition, the upper end surface of the ring body 33 is opposed to the lower end surface of the peripheral wall 27 of the cap 6 with a gap interposed therebetween, and the easily breakable connecting portions 35 are provided at two locations opposed in the radial direction. It is connected to the lower end surface of the peripheral wall 27 via the separation.

  At the time of manufacturing the plug, the cap 6 having the pilfer proof ring 32 is screwed to the outer cylinder 3 while rotating the cap 6 having the pilfer proof ring 32 in the closing rotation direction. During this assembly, the pilfer proof ring 32 may come into contact with the cock body 4 side, and the pilfer proof ring 32 may be difficult to rotate in the closing rotation direction. Therefore, on both sides in the circumferential direction with the connecting portion 35 therebetween, a locking recess 36 in which the lower end surface of the peripheral wall 27 of the cap 6 is recessed, and an engagement projecting upward from the upper end surface of the ring body 33. A locking projection 37 is provided, and the locking projection 37 is formed so as to enter the locking recess 36 (see FIG. 11).

  Then, in the relationship between the locking recess 36 and the locking projection 37 arranged so as to enter the locking recess 36, when the cap 6 is rotated in the closing rotation direction, one of the opposing side surfaces is set as an upright surface. The raised side surfaces are in contact with each other so that the locking recess 36 and the locking projection 37 are engaged with each other. Further, in the relationship between the locking recess 36 and the locking projection 37, the other side surfaces facing each other are formed as inclined surfaces, and when the cap 6 is rotated in the opening rotation direction, the inclined side surfaces are in contact with each other. So that the locking recess 36 and the locking projection 37 are not locked together.

  That is, in assembling the cap 6 at the time of manufacturing the plug, the pill fur proof ring 32 is rotated in the closing rotation direction so that the locking recess 36 and the locking projection 37 can be engaged with each other, and the outer cylinder 3 When the cap 6 is rotated in the closing rotation direction when the cap 6 is assembled to the cap 6, the cap-side locking recess 36 and the ring-side locking projection 37 are formed even if the pill fur proof ring 32 becomes difficult to rotate. The problem of disconnecting the connecting portion 35 due to the engagement is eliminated. On the other hand, when the stopper is opened, the locking recess 36 and the locking projection 37 are not engaged, so that the rotation restriction on the pill fur proof ring 32 described later is properly exhibited.

  As shown in FIG. 9, on the outer peripheral surface of the outer cylindrical body 3 to which the pill fur proof ring 32 corresponds, vertical plate-shaped protrusions 38 protrude in four directions at equal intervals in the circumferential direction of the cylindrical wall. It is installed. Each of the protrusions 38 is a portion where the blade 34 of the pilfer proof ring 32 contacts when the ring itself moves in the opening rotation direction, and the engagement state between the protrusion 38 and the blade 34 due to the contact is maintained. Thus, the pilfer proof ring 32 is provided for the purpose of stopping the rotation in the opening rotation direction.

  As shown in FIG. 13, the protrusion 38 itself protrudes to a close position even if it does not contact the inner peripheral surface of the ring main body 33 of the pilfer proof ring 32 as shown in a longitudinal section. When the cap is assembled in the plug production, the pilfer proof ring 32 rotates in the capping rotation direction, and each blade 34 inclined toward the capping rotation direction moves in the capping rotation direction and comes into contact with the protrusion 38. Then, it is deformed so as to be further lowered and moves over the projection 38. Therefore, the protrusion 38 does not stop the rotation of the ring in the capping rotation direction.

  On the other hand, when opening the cap, if the cap 6 is operated so as to rotate in the opening rotation direction, the pilfer proof ring 32 also rotates in the opening rotation direction as the cap 6 rotates, and the blades 34 come into contact with the protrusions 38. It will be. At this time, the blade 34 is deformed so as to be slightly bent. However, in the cock type spout plug 1, the blade 34 is deformed so that the blade 34 is not deformed so that the blade 34 is bent so that the blade 34 is turned in the rotation direction. Stop means 39 is provided between the protrusions 38 in the circumferential direction of the outer cylinder 3.

  As shown in FIGS. 9 and 13, the blade deformation preventing means 39 is a plate material that extends along the circumferential direction of the outer cylindrical body 3 so as to be continuous between the protrusions 38 and projects outward in a flange shape. And formed integrally with the cylindrical wall of the outer cylindrical body 3. The degree of the outward extension of the blade deformation prevention means 39 is close to the blade 34 that is inclined so as to fall down in the normal state, or the blade that is normally inclined is not pushed to the ring body side It overhangs so that it touches. Of course, the vane deformation stopping means 39 has an end portion smaller than the continuous protrusion 38, and the blade 34 that has moved along the opening rotation direction reliably contacts the outer end of the protrusion 38. The protruding amount of the protrusion 38 and the blade deformation stopping means 39 are different so as to be locked.

  In the present embodiment, the blade deformation preventing means 39 is provided so as to extend between the protrusions 38, and the cap 6 is held in the unopened cock-type spout stopper 1 to rotate it in the opening rotation direction. At this time, as shown in FIG. 14, the blades 34 of the pilfer proof ring 32 come into contact with and engage with the protrusions 38 while being prevented from being deformed by the blade deformation preventing means 39. As a result, the rotation of the pilfer proof ring 32 in the opening rotation direction is stopped, the connecting portion 35 is cut, and only the cap 6 rotates in the opening rotation direction. Then, the inner cylindrical body 8 also rotates and rises together with the cap 6, and the lower end opening 11 of the outer cylindrical body 3 is opened so that liquid can be poured out.

  The blade deformation preventing means 39 prevents the cap 6 from rotating in the opening rotation direction due to an impact applied to the cock-type spout plug of the inner bag during storage and management of the unused bag-in-box. The mechanism for stopping the rotation in the opening rotation direction is the same as the mechanism for stopping the pilfer proof ring 32 from rotating in the opening rotation direction. That is, even when vibration or impact is applied to the unopened cock-type spout stopper 1 and the cap 6 and the inner cylinder 8 are rotated in the opening rotation direction, the pilfer proof ring 32 is operated to follow the movement. When the blade rotates in the opening rotation direction, the blade 34 comes into contact with the projection 38 as in the above-described opening operation, and the blade deformation is restricted by the blade deformation stopping means 39 as shown in FIG. Since 34 is securely engaged with the protrusion 38, rotation of the pilfer proof ring 32 in the opening rotation direction is suppressed. Thereby, the cap 6 and the inner cylindrical body 8 (the cap 6 and the inner cylindrical body 8 are integrally rotated by connection) do not rotate in the opening rotation direction, and the lower end opening 11 of the outer cylindrical body 3. Is prevented from leaking without being opened.

DESCRIPTION OF SYMBOLS 1 ... Cock type spout stopper 2 ... Mounted body 3 ... Outer cylinder body 4 ... Cock main body 6 ... Cap 8 ... Inner cylinder body 32 ... Pilfer proof ring 33 ... Ring main body 34 ... Blade 38 ... Protrusion 39 ... Blade deformation | transformation prevention means

Claims (2)

A cock main body in which a conduit provided in a mounting body that fits into a spout part of a liquid packaging container is connected to an inflow port of an opening in a cylindrical wall of the outer cylindrical body, and an upper portion of the outer cylindrical body of the cock main body A cap that is screwed to the inside of the outer cylindrical body of the cock body, and can be moved up and down as the cap moves up and down. A liquid flow path is formed from the pipe line of the mounting body through the inlet to the opening at the lower end of the outer cylinder,
The inner cylinder moves upward with the cap moving while rotating, opens the liquid flow path to allow the liquid to flow out, and the inner cylinder moves with the cap moving downward while rotating. In the cock-type spout plug that is capable of moving downward and closing the liquid flow path to stop the outflow of liquid,
The lower part of the cap is positioned so as to correspond to the outer peripheral surface of the outer cylindrical body, and a pilfer proof ring having a plurality of blades on the inner peripheral surface is connected in a separable manner via an easily breakable connecting portion,
On the outer peripheral surface of the outer cylindrical body, there is provided a protrusion with which the blade of the pilfer proof ring that moves when the cap is opened, and the deformation of the blade in contact with the protrusion is restricted, and the protrusion and the protrusion are in contact with each other. A cock-type spout stopper, characterized in that it is provided with blade deformation stopping means for maintaining the engaged state with the blade.   The blade deformation stopping means is a flange-like member projecting outward from the outer peripheral surface of the outer cylinder so as to be close to or in contact with the blade, and is provided between the protrusions in the circumferential direction of the outer cylinder. The cock-type spout stopper according to claim 1.

Images