JP2019059533A - Sealing device - Google Patents

Abstract

To provide a sealing device capable of suppressing generation of overrun of a cap when a top cover or the cap is attached to a main body.SOLUTION: A sealing device 100 includes a main body 10 and a cap 20. The sealing device enables attachment and detachment of the cap 20 by a first fastening part 50a of a normal screw type disposed between the main body 10 and the cap 20, and separates an inside plug 12 from the main body 10 when opening the cap to make the cap 20 catch the inside plug by a second fastening part 50b of a reverse screw type disposed between the main body 10 and the cap 20 inside more than the first fastening part 50a. The sealing device has a radial direction stopper 71 for preventing movement to an outside direction of an outer periphery lower end part of the cap when the outer periphery lower end part of the cap 20 is pressed to a corresponding part of the main body 10 by fastening the first fastening part 50a.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a sealing device mounted on the mouth of a container, and more particularly to a sealing device having an outer screw and an inner screw.

  A known sealing device used for the mouth of a container includes a main body and an upper lid, and in the main body, a cylindrical portion fitted to the mouth of a bottle and a core are provided inside the core via a score. There is one provided with a separation part or a plug inside (see Patent Document 1).

  In this sealing device, the separation portion of the main body is attached in advance to the upper lid with a reverse screw, and in order to make it difficult to remove while making the separation portion etc. easy to attach, There is. Thereby, at the time of opening, by screwing back the upper lid attached by a forward screw to the opening of the bottle, a movement difference is caused between the separating portion and the upper lid of the main body, or the separating portion is on the outer peripheral side of the main body On the other hand, it can be forcibly rotated, thereby separating the separation part from the cylindrical part of the main body and holding the separation part on the upper lid. According to this cap structure, unsealing can be easily performed simply by rotating so as to loosen the upper lid, and the separated part separated by the unsealing is held by the upper end inner cylinder of the upper lid, so the separated part after separated is opened It can be made to function as a seal later and the separation portion does not become so-called dust.

  However, in the above-mentioned sealing device, when an excessive rotational force is applied to the upper lid when assembling the upper lid to the main body, the lower end of the upper lid spreads radially outward to cause an overrun, and the outer screw becomes tight. Rotation may not be easy.

International Publication No. 2007/126062

  The present invention has been made in view of the above background art, and it is an object of the present invention to provide a sealing device capable of suppressing the occurrence of overrun of a cap when assembling an upper lid or a cap to a main body.

  In order to solve the above-mentioned subject, a sealing device concerning the present invention is provided with a main part and a cap, and attachment or detachment of a cap is made possible by a first screw type first fastening part provided between the main part and the cap. And a reverse screw type second fastening portion provided between the main body and the cap on the inner side than the first fastening portion, thereby separating the plug from the main body upon opening and capturing the plug in the cap, And a radial stopper that prevents outward movement of the outer peripheral lower end when the outer peripheral lower end of the cap is pressed against the corresponding portion of the main body by tightening the first fastening portion.

  According to the above sealing device, since the outer peripheral lower end portion of the cap is pressed against the corresponding portion of the main body by tightening the first fastening portion, the outer circumferential lower end is prevented from moving outward. When the cap is assembled to the main body, the occurrence of an overrun of the cap can be suppressed.

  According to a specific aspect or aspect of the present invention, in the sealing device, the radial direction stopper is a fitting structure provided at a contact portion between the outer peripheral lower end portion and the corresponding portion of the main body.

  In another aspect of the present invention, the radial stopper is a projection provided at the lower end of the outer peripheral lower end, and the corresponding portion of the main body is elastically deformed by pressing of the projection to form a recess.

  In still another aspect of the present invention, the radial stopper is a protrusion provided upward from the outer peripheral side of the corresponding portion of the main body.

  In still another aspect of the present invention, at least one of the cap inner screw and the inner plug inner screw constituting the second fastening portion pulls the inner plug into the support portion on the cap side and pulls out the inner plug from the support portion In order to make it easier than overpassing, it has a shape that is biased in the counter screw direction corresponding to the pulling direction. In this case, in the step of assembling the main body to the cap, the first fastening portion can be tightened to a predetermined position, and forced overcoming of the screw thread can be generated in the second fastening portion.

  In yet another aspect of the present invention, of the cap inner screw and the inner plug inner screw constituting the second fastening portion, the cap inner screw is formed on the outer surface of the cap cylindrical portion extending downward from the top plate of the cap, The internal plug screw is formed on the inside surface of the internal plug cylinder which extends upwardly from the outer edge of the internal plug seal.

It is a sectional view for explaining a sealing device which is one embodiment of the present invention. It is sectional drawing explaining the main body which comprises the sealing device of FIG. It is sectional drawing explaining the cap which comprises the sealing apparatus of FIG. (A) is an expanded sectional view explaining a thread of a 1st fastening part, (B) is an expanded sectional view explaining a thread of a 2nd fastening part. (A) is a partial expanded sectional view explaining the structure of a radial direction stopper. (B) and (C) is a partial expanded sectional view explaining the modification of the radial direction stopper shown to (A). (A) And (B) is sectional drawing explaining the assembly method of the sealing apparatus shown in FIG. 1, and usage. (A) And (B) is sectional drawing explaining the assembly method of the sealing apparatus shown in FIG. 1, and usage.

  A sealing device according to an embodiment of the present invention will be described with reference to FIGS. The sealing device 100 shown in FIG. 1 includes a main body 10 attached to the opening 2a of the container 2 such as a paper pack, a pouch container, etc., and a cap 20 attached to the main body 10 so as to cover the main body 10. ing.

  As shown in FIGS. 1 and 2, the main body 10 is an integrally molded product made of resin, and is separated from the outer peripheral portion 11 fixed along the peripheral portion 2 b of the opening 2 a of the container 2 and at the time of opening. And an inner plug 12. Hereinafter, unsealing means that the inside plug 12 is separated from the outer peripheral portion 11, and opening and closing of the cap 20 after opening is referred to as opening or closing.

  The outer peripheral portion 11 of the main body 10 is a portion that forms a spout for the contents of the container 2 after separation of the inner plug 12, and the outer or upper side of the container 2 along the screw axis AX which is the axial center of the main body 10. The main body outer peripheral wall 31 which is a cylindrical member extended to the Further, the outer peripheral portion 11 has a thick main body pedestal 32 projecting radially outward at the lower end of the main body outer peripheral wall 31, and a thin welded portion 33 projecting radially outward from the circumferential surface of the main body pedestal 32. Have. The upper surface of the welding portion 33 is fixed to the lower surface of the peripheral portion 2 b of the container 2 by ultrasonic welding. Locking portions 34 are formed on the circumferential surface of the main body pedestal 32 to project radially outward at equal intervals at two to eight circumferential directions. Further, on the outer peripheral surface of the main body outer peripheral wall 31 of the main body 10, an outer main body screw 51 for screwing to the cap 20 is formed. The screw axis AX means an axis passing through the center of the main body 10 and the cap 20 or a rotation axis of the cap 20.

  The inner plug 12 of the main body 10 includes a disc-shaped sealing body 41 disposed at the bottom and a cylindrical inner plug cylindrical portion 42 extending upward from the outer edge of the sealing body 41. The outer peripheral side boundary portion 17 where the outer edge of the sealing body 41 and the lower end portion of the inner plug cylindrical portion 42 are connected is connected to the outer peripheral portion 11 of the main body 10 by an annular thin portion 15. On the lower surface of the thin portion 15, an annular V-shaped score 16 is formed. The thin portion 15 is cut at the time of opening to separate the plug 12 from the main body 10. The inside plug cylindrical portion 42 is concentrically spaced on the inner side of the outer peripheral wall 31 of the outer side. On the inner peripheral surface (inner side surface) of the inner plug cylindrical portion 42, an inner inner plug screw 52 having a different helical direction with respect to the main body outer screw 51 and having a reverse screw relationship is formed.

  As shown in FIGS. 1 and 3, the cap 20 is an integrally molded product made of resin, and includes a disc-shaped cap top plate 21 and a cylindrical cap outer peripheral wall 22 as an outer portion. A knurl is formed around the cap outer peripheral wall 22. The cap 20 includes a cap cylindrical portion 23 which is an inner support portion disposed concentrically and concentrically with the cap outer peripheral wall 22 and an outer support portion 24 disposed outside the cap cylindrical portion 23. Further, an inner ring 25 which is similarly concentric and cylindrical but relatively short in the screw axis AX direction is provided between the cap outer peripheral wall 22 and the outer support portion 24. The inner ring 25 seals the opening 11a of the container 2 after opening. The cap cylindrical portion 23, the outer support portion 24 and the inner ring 25 are connected by a cap top plate 21. Then, a cap outer screw 53 is formed on the inner peripheral side of the cap outer peripheral wall 22 to be screwed with the main body external screw 51 formed on the outer peripheral side of the main body outer peripheral wall 31 of the main body 10. On the (outer surface), an inner cap screw 54 is formed which is screwed to the inner plug inner screw 52 formed on the inner peripheral side surface of the inner plug cylindrical portion 42 of the inner plug 12 provided in the main body 10.

  In the above, the main body outer screw 51 of the main body outer peripheral wall 31 of the main body 10 and the cap outer screw 53 of the cap outer peripheral wall 22 of the cap 20 constitute the first fastening portion 50a that enables the cap 20 to be attached to and detached from the main body 10 doing. Further, the inner plug inner screw 52 of the inner plug cylindrical portion 42 of the main body 10 and the inner cap screw 54 of the cap cylindrical portion 23 of the cap 20 clamp the inner plug 12 of the main body 10 to the cap cylindrical portion 23 of the cap 20 The second fastening portion 50b for fixing is formed. That is, the cap cylindrical portion 23 of the cap 20 functions as a support portion for capturing the inner plug 12 by the second fastening portion 50 b and separating the inner plug 12 from the main body 10 or the outer peripheral portion 11. The first fastening portion 50a and the second fastening portion 50b are in a reverse screw or reverse spiral relationship with each other. Specifically, the first fastening portion 50a is a positive screw type screwing portion that loosens in a counterclockwise rotation, and the second fastening portion 50b is a reverse screw type screwing portion that tightens in a counterclockwise rotation. It is. That is, when the cap 20 is raised by being unscrewed so that the first fastening portion 50a is loosened by rotating the cap outer peripheral wall 22 of the cap 20 counterclockwise as viewed from the upper side, the cap cylindrical portion 23 of the cap 20 When viewed from the side, the second fastening portion 50b is tightened by rotating in the counterclockwise direction, and the inside plug cylindrical portion 42 is further raised.

  Here, the screwing direction or screwing direction of the second fastening portion 50b will be described in detail. For the inside plug cylindrical portion 42 of the main body 10, the upper side along the screw axis AX is in a screw advancing direction in which screwing is performed by counterclockwise rotation viewed from the lower side with respect to the cap cylindrical portion 23 of the cap 20 The lower side along the screw axis AX is in the direction opposite to the direction in which the cap cylindrical portion 23 is unscrewed. Further, for the cap cylindrical portion 23, the lower side along the screw axis AX is in a screw advancing direction in which screwing is performed by the counterclockwise rotation when viewed from the upper side with respect to the inside plug cylindrical portion 42. The upper side along the direction is an anti-screw advancing direction in which the internal plug cylindrical portion 42 is unscrewed. As described above, the screwing direction or screwing direction accompanying the counterclockwise rotation of the member constituting the second fastening portion 50b indicates the direction of the moving component of the advancing and retracting along the screw axis AX, and in the normal case, that is, As a result, although it is the same as the screwing direction or screw advancing direction accompanying the clockwise rotation of the members constituting the first fastening portion 50a, the elements constituting one fastening member are in the opposite direction.

  The first fastening portion 50a, that is, the main body outer screw 51 formed on the main body outer peripheral wall 31 of the main body 10, and the cap outer thread 53 formed on the cap outer peripheral wall 22 of the cap 20 engaged therewith, It has a thread shape in which the resistance to the overtaking pulled out from the cap outer peripheral wall 22 and the resistance to the overriding pushing the main body outer peripheral wall 31 into the cap outer peripheral wall 22 are balanced.

  On the other hand, the second fastening portion 50b, that is, the inner plug inner screw 52 formed in the inner plug 12 of the main body 10, and the cap inner screw 54 formed in the cap cylindrical portion 23 of the cap 20 meshed therewith, Is pushed into the cap cylindrical portion 23 as the support portion, and has a biased thread shape which makes it easier than the overtaking in which the inside plug 12 is pulled out from the cap cylindrical portion 23 as the support portion. Such a biased thread shape that facilitates pushing is also referred to as a barbed shape.

  With reference to FIG. 4 (A), the thread shape of the external threads 51 and 53 which constitute the first fastening portion 50a will be described in more detail.

  The external main screw 51, which is an external thread that constitutes the first fastening portion 50a, has a screwing direction or a screwing direction (a direction in which the outer peripheral portion 11 extends along the screw axis AX) in a cross section as illustrated. The screw thread has a balanced cross-sectional shape with respect to the upper side) and the screw return direction or the counter screw direction (lower side) of the outer peripheral portion 11. More specifically, the thickness of the base of the external main screw 51 is set wider than the thickness of the top, and the screw upper surface 51t, which is the engagement surface on the screw side, is the engagement surface on the opposite side. Similar to the screw thread lower surface 51b, it is inclined (angle θ11 下面 φ11).

  Similarly, in the cross section as shown in the drawing through which the screw axis AX passes, the cap outer screw 53, which is a female screw constituting the first fastening portion 50a, is a screwing direction or a screwing direction of the cap 20 along the screw axis AX. The screw thread has a balanced cross-sectional shape with respect to the side) and the unscrewing direction or the anti-screwing direction (upper side) of the cap 20. More specifically, the thickness of the base of the cap external screw 53 is set wider than the thickness of the top, and the screw lower surface 53b, which is the engagement surface on the screw side, is the engagement surface on the counter screw side. Similar to the screw thread upper surface 53t, it is inclined (angle θ12 ≒ φ12).

  The external screws 51, 53 constituting the first fastening portion 50a are multiple thread screws, and more specifically, are double thread screws, and the lead L1 of the first fastening portion 50a is 2 of the pitch of the main body external thread 51. It is doubled. The extracorporeal screw 51 comprises a first strip 51f and a second strip 51s, and these strips 51f and 51s are alternately arranged. Similarly, the cap outer screw 53 is composed of a first strip 53f and a second strip 53s, and these strips 53f and 53s are alternately arranged.

  With reference to FIG. 4 (B), the thread element shape of the inner threads 52 and 54 which constitute the second fastening portion 50b will be described in more detail.

  The inner plug inner screw 52 or the protrusion 52p, which is an internal thread constituting the second fastening portion 50b, moves along the screw axis AX of the inner plug 12 toward its tip in a cross section as illustrated through which the screw axis AX passes. As a component, it is a thread having a cross-sectional shape that is biased in the screw return direction or the anti-screwing direction (lower side). From a different point of view, the inner plug internal screw 52 is a second surface that comes into contact when withdrawn, that is, a screw surface that is the engagement surface on the opposite side with the cap internal screw 54 when the internal plug 12 is displaced downward. 52 b is formed at an angle close to horizontal (angle θ 21), and the thickness of the base is set wider than the thickness of the top. That is, the inner plug inner screw 52 is a first surface to be in contact when overtaking in or a screw upper surface 52t which is an engagement surface on the screw side, a second surface to be in contact when pulling out or an engagement surface on the opposite side. It is more inclined (angle θ21 <φ21) than a certain screw lower surface 52b.

  On the other hand, the cap internal screw 54, which is an external thread constituting the second fastening portion 50b, has a movement component along the screw axis AX of the cap 20 toward its tip in a cross section as shown in the drawing through which the screw axis AX passes. The screw thread has a cross-sectional shape that is biased in the screw return direction or the anti-screwing direction (upper side). From a different point of view, the cap inner screw 54 is a second surface that comes into contact when withdrawn, that is, the screw upper surface 54t that is the engagement surface on the opposite side with the inner plug screw 52 when displacing the cap 20 upward. Are formed at an angle close to horizontal (angle .theta. 22), and the thickness of the base is set wider than the thickness of the top. That is, the cap inner screw 54 is a second surface or a screw-engagement-side engaging surface that abuts with the first surface or screw-side engaging surface 54b, which is a screwing-side engaging surface, when pulling over. It is greatly inclined (angle θ22 <φ22) than the screw upper surface 54t.

  The inner screws 52, 54 constituting the second fastening portion 50b are multiple thread screws, and specifically, are double thread screws, and the lead L2 of the second fastening portion 50b is the pitch of the inner plug inner thread 52 It is doubled. The inside plug inner screw 52 is composed of a first line 52f and a second line 52s, and these lines 52f and 52s are alternately arranged. On the other hand, the cap inner screw 54 is composed of a first strip 54f and a second strip 54s, and these strips 54f and 54s are alternately arranged.

  As shown in FIGS. 1 and 5A, a radial stopper 71 is provided between the main body 10 and the cap 20 in order to prevent the cap outer peripheral wall 22 from expanding outward in the radial direction. The radial stopper 71 is a fitting structure provided at the contact portion between the outer peripheral lower end portion 22 e of the cap outer peripheral wall 22 and the corresponding portion 10 e of the main body 10. The radial stopper 71 includes a projection 71 b which is formed on the outer peripheral lower end 22 e and which can be protruded, and a recessed groove 71 a formed in a corresponding portion 10 e of the main body 10. The projections 71b extend annularly and continuously along the outer peripheral lower end 22e, but may be separate and discontinuous. The recessed groove 71 a extends annularly and continuously along the main body pedestal 32. When the outer circumferential lower end 22 e of the cap 20 is pressed against the corresponding portion 10 e of the main body 10 by tightening the first fastening portion 50 a at the time of assembly, the radial stopper 71 engages with the protrusion 71 b and the concave groove 71 a And prevents the outer peripheral lower end 22e from moving radially outward. The radial direction stopper 71 may be provided by providing a protrusion on the corresponding portion 10 e of the main body pedestal 32 and providing a groove on the outer peripheral lower end 22 e of the cap 20.

  FIG. 5 (B) shows a modification of the radial direction stopper 71 shown in FIG. 5 (A). In this case, the radial stopper 71 is a protrusion 171b provided at the lower end of the outer peripheral lower end 22e, and the corresponding part 10e of the main body 10 is elastically deformed by the pressing of the protrusion 171b to form a recess 72. That is, the main body 10 is formed of a material that is more easily elastically deformed than the cap 20. The projection 171b extends annularly and continuously along the outer peripheral lower end 22e, but may be separated and discontinuous. When the outer circumferential lower end 22e of the cap 20 is pressed against the corresponding portion 10e of the main body 10 by tightening the first fastening portion 50a at the time of assembly, the radial stopper 71 bites into the main body pedestal 32 to form a recess 72. To prevent the radially outer end of the outer peripheral lower end 22e from moving outward. When the cap 20 is made of a material that is more easily elastically deformed than the main body 10, the corresponding portion 10e of the main body base 32 may be provided with a protrusion.

  FIG. 5C shows another modification of the radial direction stopper 71 shown in FIG. 5A. In this case, the radial stopper 71 is a protrusion 271a provided upward from the outer peripheral side of the corresponding portion 10e of the main body 10. The protrusions 271a extend annularly continuously along the corresponding portion 10e or the body pedestal 32, but may be separate and discontinuous. The radial stopper 71 is located outside the outer peripheral lower end 22 e of the cap 20, and the outer peripheral lower end 22 e of the cap 20 is pressed against the corresponding portion 10 e of the main body 10 by tightening the first fastening portion 50 a during assembly. In addition, the movement of the outer peripheral lower end portion 22e outward in the radial direction is blocked.

  Hereinafter, an example of an assembling method of the sealing device 100 will be described with reference to FIG. First, the main body 10 and the cap 20 are prepared. Next, the main body external screw 51 of the main body 10 is engaged with the cap external screw 53 of the cap 20 so that the main body 10 is accommodated in the cap 20, and the main body 10 is rotated clockwise as viewed from the main body 10 Is rotated clockwise as viewed from the cap 20 side. As a result, the first fastening portion 50a is tightened so as to be screwed in, and the main body outer screw 51 and the cap outer screw 53 are screwed together. At this time, the inner plug inner screw 52 and the inner cap screw 54 that constitute the second fastening portion 50 b are screwed by clockwise rotation. Here, since both inner screws 52 and 54 are formed in a skewed thread shape or a bent shape which is easily deformed when pressed as described above, they pass over the screw threads of both inner screws 52 and 54 while being deformed mutually. It is meshed with each other. At this time, the distal end portion 24 d of the outer support portion 24 abuts on or approaches the outer upper surface of the thin portion 15.

  In this manner, in a state where the main body 10 and the cap 20 are screwed in deepest and engaged with each other, the distance between the main body 10 and the cap 20 is adjusted, and formed at the base of the outer support portion 24 and the cap cylindrical portion 23 The tip end 42d of the inside plug cylindrical portion 42 is accommodated in the recessed portion E to be formed. In addition, the lip portion 31 b formed at the tip of the main body outer peripheral wall 31 is positioned in contact with the lower surface 21 t of the cap top plate 21 of the cap 20.

  Furthermore, for the radial direction stopper 71, for example, in the case of FIG. 5A, the projection 71b and the recessed groove 71a are fitted, and the cap 20 is in the stage where the outer peripheral lower end 22e and the corresponding portion 10e abut. The outer peripheral lower end portion 22e is restricted from moving radially outward. Therefore, the cap 20 can be prevented from being strongly tightened to the main body 10, and the cap outer peripheral wall 22 can be prevented from being compressed and elastically deformed.

  The sealing device 100 (the main body 10 and the cap 20) assembled as described above is inserted into the opening 2a of the container 2 such as a paper pack from the back side, and the inner peripheral surface of the opening 2a The outer peripheral surface of the pedestal 32 is fitted and joined to the container 2 by ultrasonic bonding, adhesion by an adhesive, or the like.

  Hereinafter, the unsealing operation of the sealing device 100 according to the above-described embodiment will be described with reference to FIG. 6 (B) and the like.

  First, as shown in FIG. 6A, the cap 20 is at a reference position or an initial position (a state of being screwed in all the way) before the rotation operation of the fastening portions 50a and 50b, and the inner plug 12 and the body outer peripheral wall 31 In the coupled state, the opening 2a of the container 2 or the opening 11a of the main body 10 is in a sealed state.

  When the cap 20 is loosened from the state shown in FIG. 6A, that is, when it is rotated counterclockwise, the cap 20 idles by a predetermined rotation angle, and the lower surface 52b of the inner plug screw 52 and the cap inner screw The screw thread upper surface 54t abuts. When the cap 20 is further rotated counterclockwise, the cap external screw 53 abuts on the main body external screw 51. At this time, since the inside plug 12 is screwed with the cap 20 by the reverse screw, tightening of the second fastening portion 50b is started, and the inside plug 12 is moved upward, and the thin part 15 is moved upward accordingly. Be stretched. That is, tightening of the second fastening portion 50b proceeds slightly, and the inside plug 12 is moved upward while rotating counterclockwise as viewed from above with respect to the outer peripheral portion 11 (see FIG. 6B). When the cap 20 is further rotated counterclockwise, the cap 20 is rotated and moved upward by screwing of the cap external screw 53 and the main body external screw 51, and the thin-walled portion 15 of the main body 10 receives further shearing force therebetween. The inner plug 12 is separated from the outer peripheral wall 31 and opened (see FIG. 7A).

  In this state, in the inside plug 12, the upper thread surface 54t of the cap inner screw 54 of the inside plug 12 abuts the lower surface 52b of the inside plug internal screw 52 of the inside plug cylindrical portion 42, and the inside plug cylindrical portion 42. The front end portion 42 d of the front end 42 d approaches or abuts on the lower surface 21 t of the cap top plate 21 at the recess E, whereby the locked state by screwing is maintained and held by the cap 20.

  Further, when the cap 20 is rotated in the loosening direction, the cap 20 is separated from the outer peripheral wall 31 so that the contents in the container 2 can be poured. At this time, since the inside plug 12 is secured to the cap 20 and is in a state of being tightened to a certain extent with respect to the cap 20, the inside plug 12 is not likely to be detached. That is, once the opening is performed, the inside plug 12 fixed to the main body 10 side is fixed to the cap 20 side.

  After unsealing, when the cap external screw 53 of the cap 20 is screwed into the main body external screw 51 of the main body 10 and the cap 20 is rotated clockwise, the lip portion 31 b formed on the upper end of the main body outer peripheral wall 31 Is in contact with the lower surface 21t of the cap top plate 21 of the cap 20, and the end 24d of the outer support portion 24 is in close contact with the outer surface of the thin portion 15 (see FIG. 7B).

  In the sealing device 100 of the present embodiment, when the outer peripheral lower end 22e of the cap 20 is pressed by the corresponding portion 10e of the main body 10 by tightening the first fastening portion 50a, the outer peripheral lower end 22e moves outward. Since the radial direction stopper 71 which blocks these is included, when assembling the cap 20 to the main body 10, it can suppress that an overrun of the cap 20 arises.

  The sealing device according to the present embodiment has been described above, but the sealing device according to the present invention is not limited to the above. For example, in the above embodiment, the specifications of the pitch, number of turns, thread height and the like of the main body external screw 51 and the cap external screw 53 constituting the first fastening portion 50a can be appropriately changed according to the application. . Further, specifications such as pitch, number of turns, thread height and the like of the cap inner screw 54 and the inner plug inner screw 52 constituting the second fastening portion 50 b can be appropriately changed according to the application.

  Moreover, in the said embodiment, about the outer side support part 24 of the cap 20, this can also be abbreviate | omitted.

  Further, in the above embodiment, the inside plug cylindrical portion 42 of the main body 10 and the cap cylindrical portion 23 of the cap 20 can be switched inside and outside. Also in this case, the inner thread of the inner plug cylindrical portion 42 and the inner thread of the cap cylindrical portion 23 constitute a second fastening portion 50b having a reverse thread or reverse spiral relationship with respect to the first fastening portion 50a.

  In the above embodiment, the shapes of the main body external screw 51 and the cap external screw 53 constituting the first fastening portion 50a are not limited to those illustrated in FIG. It can also be a screw thread. Further, the outer screws 51, 53 constituting the first fastening portion 50a are not limited to those formed continuously in a spiral shape, and may be formed of a plurality of separated portions.

  In the above embodiment, the shapes of the inner plug inner screw 52 and the cap inner screw 54 that constitute the second fastening portion 50b are not limited to those illustrated in FIG. Further, the inner screws 52, 54 constituting the second fastening portion 50b are not limited to those continuously formed in a spiral shape, and may be formed of a plurality of separated portions. Also, one of the inner screws 52 and 54 may be formed in a barbed shape, and the other may be formed in a shape in which the resistances for inserting and removing are balanced.

  In the above-described embodiment, it is possible to form a burr storage portion recessed in a step-like manner at the tip end portion 24 d of the outer support portion 24.

  In the above embodiment, the upper surface of the welded portion 33 of the main body 10 is fixed to the lower surface of the peripheral portion 2b of the container 2, but the lower surface of the welded portion 33 may be fixed to the upper surface of the peripheral portion 2b . In this case, the main body pedestal 32 of the main body 10 and the welding portion 33 may have the same thickness, and the locking portion 34 may be omitted.

  Reference Signs List 2 container 2a opening 2b peripheral edge 10 main body 11 outer periphery 11a opening 12 plug inside 15 thin wall 16 score 10 outer peripheral side boundary 20 ... Cap, 21 ... Cap top plate, 22 ... Cap outer peripheral wall, 23 ... Cap cylindrical part, 24 ... Outer support part, 24r ... Burr storage part, 25 ... Inner ring, 31 ... Main body outer peripheral wall, 32 ... Main body base, 33 ... Welded part 34 Locking part 41 Sealed body 42 Inner plug cylindrical part 50a First fastening part 50b Second fastening part 51 Main body external thread 51f 51s Strip 52 ... Inside plug internal thread element, 52p ... Protrusion, 52b ... Thread top surface, 52t ... Thread top surface, 52f, 52s ... Struts, 53 ... Cap outer threads, 53f, 53s ... Struts, 54 ... Cap internal thread elements 54b ... screw Yamashita surface, 54 t ... screw mountain surface, 54f, 54s ... clause 71 ... radial stopper, 71a ... groove, 71b ... projection, 100 ... sealing device, AX ... screw shaft

Claims (6)

A main screw type first fastening portion provided with a main body and a cap, and provided between the main body and the cap enables attachment and detachment of the cap, and the main body inside the first fastening portion A sealing device for separating a plug inside the main body from the main body at the time of unsealing and capturing the plug by the second fastening portion of a reverse screw type provided between the second part and the second part;
A sealing device having a radial stopper that prevents outward movement of the outer peripheral lower end when the outer peripheral lower end of the cap is pressed against the corresponding portion of the main body by tightening the first fastening portion. .   The sealing device according to claim 1, wherein the radial stopper is a fitting structure provided at a contact portion between the outer peripheral lower end portion and the corresponding portion of the main body.   The seal according to claim 1, wherein the radial stopper is a protrusion provided at the lower end of the outer peripheral lower end, and the corresponding portion of the main body is elastically deformed by pressing of the protrusion to form a recess. apparatus.   The sealing device according to claim 1, wherein the radial stopper is a protrusion standing upward from an outer peripheral side of the corresponding portion of the main body.   At least one of the cap inner screw and the inner plug inner screw constituting the second fastening portion is easier to overturn pushing the inner plug into the support portion on the cap side than pulling out the inner plug from the support portion The sealing device according to any one of claims 1 to 4, wherein the sealing device has a shape that is biased in an antiscrew direction corresponding to the drawing direction.   The cap inner screw of the cap inner screw and the inner plug inner screw constituting the second fastening portion is formed on the outer surface of the cap cylindrical portion extending downward from the top plate of the cap, and the inner plug inner screw is The sealing device according to any one of claims 1 to 5, wherein the sealing device is formed on the inner side surface of the inner plug cylindrical portion extending upward from the outer edge of the inner plug sealing body.

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