JP2011213372A - Synthetic resin container lid - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a novel and improved synthetic resin container lid which generates a desired sound by at least a part of a protruding piece is resiliently restored after it is fully resiliently deformed when the protruding piece moves from the lower face side to the upper face side of a stopper jaw portion even if a protruding length of the protruding piece is relatively short.SOLUTION: A synthetic resin container lid 2 includes a body 4 having a cylindrical skirt wall 10 suspended from a top face wall 8 and the circumferential edge of the top face wall, an inner circumferential surface of the skirt wall being formed with a female thread with which a male thread is threadedly engaged, and a cylindrical tamper-evident hem part 6 connected with the skirt wall of the body via a plurality of breakable bridging portions 22. Stopping means for being stopped by the stopper jaw portion is arranged in the inner circumferential surface of the cylindrical tamper-evident hem part. A downwardly protruding piece 40 is arranged in the skirt wall of the body. Non-breaking connecting pieces 48a and 48b are arranged circumferentially on both sides of the protruding piece. At least one slit extending upwardly from the lower edge of the protruding piece is formed in the protruding piece.

Description

  The present invention relates to a synthetic resin container lid having tamper-evident characteristics that prevents the entire container lid from being separated from the container even after opening the mouth and neck of the container. A tamper-evident hem connected to the main body through a plurality of breakable bridging parts arranged at intervals, the bridging part is broken and the main body is detached from the mouth and neck of the container The present invention also relates to a synthetic resin container lid of the type in which the main body is continuously connected to the tamper-evidence skirt that is continuously attached to the mouth and neck of the container via the non-breaking connection piece.

  As a synthetic resin container lid with tamper evident characteristics applied to a container in which a male thread and a locking jaw part located below the male thread are formed on the outer peripheral surface of the mouth and neck, In the following Patent Documents 1 and 2, a top surface wall and a cylindrical skirt wall that hangs down from the periphery of the top surface wall are formed, and a female thread that is screwed into a male thread is formed on the inner peripheral surface of the skirt wall. The main body is connected to the skirt wall of the main body through a plurality of breakable bridging portions arranged at intervals in the circumferential direction, and the inner peripheral surface is locked to the locking jaw portion. A cylindrical tamper-evidence skirt portion provided with a stopping means, and a projecting piece projecting downward is disposed on the skirt wall of the main body. Connect the skirt wall to the tamper evidence hem and connect it to the tamper evidence hem Body movement allowed is the unbroken connecting pieces are disposed plastic container closure having a tilting part tilting angle is gradually made to change on a vertical line is disclosed upwards Te.

  When the container lid as described above is attached to the mouth and neck of the container and the mouth and neck are sealed, the container lid is fitted on the mouth and neck and rotated in the closing direction, and the female thread on the container lid is opened. Screw it onto the male thread on the neck. As the screwing progresses, the container lid is lowered with respect to the mouth and neck, and the locking means formed at the skirt of the tamper evidence elastically rides over the locking jaw of the mouth and neck and below it. It can be locked. When opening the mouth and neck, the container lid is rotated in the opening direction to release the threaded engagement between the male thread on the mouth and neck and the female thread on the container lid. The body of the container lid is raised with respect to the mouth and neck when the screwing is released, but the tamper evidence hem is prevented from rising because the locking means is locked to the locking jaw of the mouth and neck. Therefore, stress is generated in the breakable bridge portion and the breakable bridge portion is broken. When the breakable bridging portion is broken and the main body continues to rise, and the main body is separated upward from the tamper evidence skirt, the inclination of the tilting portion of the non-breaking connecting piece is gradually changed accordingly. . Even after the main body is detached from the mouth and neck, the main body is swung around the required part of the non-breaking connecting piece and pivoted to one side from the mouth and neck of the container. The body continues to be attached to the tamper-evidence skirt via the non-breaking connection piece and is therefore not separated from the container. If the consumption of the container is interrupted when it is partially consumed, not the whole, the main body is swung in the opposite direction to the swiveling direction when opening with the required part of the non-breaking connecting piece as the swivel center Attach it to the mouth and neck of the container, then rotate the container lid in the closing direction and re-engage the female thread of the container lid with the male thread of the mouth and neck, thus temporarily sealing the mouth and neck be able to.

JP 2008-56246 A JP 2010-18290 A

  Thus, according to the experience and experiments of the present inventors, the conventional container lid of the above-described form has the following problems to be solved. That is, when the container lid body is detached from the mouth / neck portion of the container and then swung around the required portion of the non-breaking connecting piece to be displaced to one side of the mouth / neck portion, the protruding piece is elastically deformed and the mouth is moved. The consumer understands that the locking jaw of the neck is moved from the lower side to the upper side and then elastically restored to generate a “click” sound that turns the body to the required position. It is hoped that it can be done. However, in particular, when the overall height of the container lid is low and therefore the protruding length of the protruding piece is small, it is difficult for the protruding piece to elastically deform due to the relatively large rigidity of the protruding piece, Therefore, when the protruding piece is moved from the lower surface side to the upper surface side of the locking jaw portion of the mouth and neck portion, the tamper evidence hem is caused by the so-called play between the mouth and neck portion and the tamper evidence hem portion. The part is maximally displaced with respect to the mouth and neck, and the elastic deformation of the protruding piece is remarkably small even if it is generated. It becomes a thing.

  The present invention has been made in view of the above facts, and the main technical problem thereof is that the protruding piece is moved from the lower surface side to the upper surface side of the locking jaw portion even when the protruding length of the protruding piece is relatively small. In order to provide a new and improved synthetic resin container lid in which at least a part of the projecting piece is elastically restored after being sufficiently elastically deformed to generate a desired sound.

  As a result of intensive studies, the present inventors have found that the main technical problem can be achieved by forming at least one slit extending upward from the lower end edge of the protruding piece.

That is, according to the present invention, as a synthetic resin container lid that achieves the main technical problem described above, a male thread and a locking jaw located below the male thread are formed on the outer peripheral surface of the mouth and neck. A synthetic resin container lid applied to a container that has a top surface wall and a cylindrical skirt wall that hangs down from the peripheral edge of the top surface wall. It is connected to the skirt wall of the main body through a main body in which female threads to be screwed are formed and a plurality of breakable bridging portions arranged at intervals in the circumferential direction. Includes a cylindrical tamper-evidence hem portion provided with locking means to be locked to the locking jaw, and a protruding piece protruding downward is provided on the skirt wall of the main body. The skirt wall of the main body and the tamper evidence hem are connected to both sides of the protruding piece in the circumferential direction. And the body is in the non-breaking plastic container closure which connecting piece is provided with a tilting unit which is inclination angle with respect to the moved in the upward vertical line is gradually caused to vary with respect to the tamper evident bottom portion,
A synthetic resin container lid is provided in which at least one slit extending upward from the lower end edge is formed in the protruding piece.

  The slit preferably extends to the upper end of the protruding piece. In a preferred embodiment, the protruding piece is formed with two slits at intervals in the circumferential direction, and the protruding piece is divided into three divided portions located adjacent to each other in the circumferential direction. Of the three divided parts, the central divided part located at the center in the circumferential direction is longer than the two divided parts located on both sides in the circumferential direction, and extends downward beyond the lower edge of the divided parts on both sides. It is preferable that the circumferential width of the central divided portion is smaller than the circumferential width of the both side divided portions. It is preferable that the outer peripheral surface of the central divided portion is inclined inward in the radial direction downward, and the thickness of the central divided portion is gradually reduced downward.

  In the synthetic resin container lid of the present invention, the protruding piece is divided into at least two portions adjacent in the circumferential direction by forming at least one slit extending upward from the lower end of the protruding piece, thereby protruding. The rigidity of the piece is reduced, and even when the protruding length of the protruding piece is relatively small, when the protruding piece is moved from the lower surface side to the upper surface side of the locking jaw, at least a part of the protruding piece is After being fully elastically deformed, it is elastically restored to produce the desired sound.

The front view which shows suitable embodiment of the container lid comprised according to this invention. The front view which shows a part of container lid shown in FIG. 1 with sectional drawing. The front view which shows the protrusion piece in the container lid shown in FIG. Sectional drawing in line IV-IV of FIG. The front view which shows the state which mounted | wore the mouth neck part of the container with the container lid shown in FIG. 1, and sealed the mouth neck part, in part. FIG. 6 is a front view showing a state in which the container lid has been rotated somewhat in the opening rotation direction in order to open the mouth and neck from the state shown in FIG. 5. The side view which shows the state which rotated the container lid further in the opening rotation direction from the state shown in FIG. 6, removed the main body of the container lid from the mouth neck, and was hold | maintained in the required position. FIG. 7 is a partial view for explaining the behavior of the central divided portion and both side divided portions of the protruding piece in the container lid main body when the container lid main body is swung to the state shown in FIG. 7 (the central divided portion is a locking jaw portion). Just before getting over). FIG. 7 is a partial view for explaining the behavior of the central divided portion and both side divided portions of the protruding piece in the container lid main body when the container lid main body is swung to the state shown in FIG. 7 (the central divided portion is a locking jaw portion). After getting over).

  Hereinafter, a preferred embodiment of a synthetic resin container lid constructed according to the present invention will be described in more detail with reference to the accompanying drawings.

  Referring to FIGS. 1 and 2, a container lid, generally designated by the numeral 2, which can be conveniently integrally molded from an appropriate synthetic resin such as polyethylene or polypropylene by injection molding or compression molding, A tamper evidence skirt 6. The main body 4 has a circular top wall 8 and a cylindrical skirt wall 10 depending from the periphery of the top wall 8. Two sealing ridges, that is, an inner annular ridge 12 and an outer annular ridge 14 are formed on the inner surface of the top wall 8.

  In the illustrated container lid 2, the upper surface of the top wall 8 of the main body 4 and the outer peripheral surface of the skirt wall 10 are connected via an arcuate boundary surface in the cross-sectional view. The outer peripheral surface of the skirt wall 10 is suspended vertically. An annular flange 16 is provided at the lower end of the skirt wall 10 so as to protrude somewhat outward in the radial direction. Above the annular flange 16, the outer peripheral surface of the skirt wall 10 is composed of a ridge portion extending in the axial direction and spaced apart in the circumferential direction, and a non-ridge portion 18 positioned between the ridge portions. Is formed. Formed on the inner peripheral surface of the skirt wall 10 are female threads, more specifically, three female threads 20 arranged at equal intervals and extending over an angle range of 215 degrees. In a specific angle region (that is, a specific angle region located on the opposite side in the diametrical direction with respect to the protruding piece described later) X over an angle range of 20 to 50 degrees, the female thread 20 located on the lower side in the axial direction is notched. (The reason will be described later).

  1 and 2, the tamper evidence skirt 6 is generally cylindrical and includes a plurality of breakable bridging portions 22 arranged at intervals in the circumferential direction. Are connected to the skirt wall 10 of the main body 4. The breakable bridge portion 22 may be substantially the same as the breakable bridge portion disclosed in Japanese Patent Application Laid-Open No. 2007-191206, the upper end portion is connected to the lower end portion of the inner peripheral surface of the skirt wall 10, and the lower end portion is a tamper. It is connected to the upper end of the inner peripheral surface of the evidence skirt 6. Locking means 24 is disposed on the inner peripheral surface of the tamper evidence skirt 6. The locking means 24 in the illustrated embodiment is formed of five protrusions extending in the circumferential direction at intervals in the circumferential direction, and the cross-sectional shape of each of the protrusions is a substantially right triangle. A fitting lower portion 28 and a loose fitting upper portion 30 are disposed in a region above the locking means 24. The inner diameter of the fitting lower portion 28 is somewhat smaller than the inner diameter of the loose fitting upper portion 30 (for details of the engaging means 24, the fitting lower portion 28 and the loose fitting upper portion 30 in the illustrated embodiment, the applicant of the present application). This is described in detail in the specification and drawings of Japanese Patent Application No. 2010-006784 relating to the above application, so refer to such description). If desired, such as a plurality of locking pieces disposed at intervals in the circumferential direction and inclined upward inward in the radial direction from the inner circumferential surface of the tamper evidence skirt 6, The locking means 24 can also be configured from other appropriate types of locking pieces. In the region indicated by reference numeral 32 in FIG. 1, the locking means 24 is not provided, but a reinforcing protrusion 34 (FIG. 4) is formed that protrudes inward in the radial direction. The cross-sectional shape of the reinforcing protrusion 34 may be a substantially semicircular shape.

  1, the lower end edge of the skirt wall 10 of the main body 4 is displaced above the lower end edge of the other region, and the upper end edge of the tamper evidence skirt 6 is the other region. The upper edge of the tamper evidence skirt 6 is further displaced downward in the center of the region 26, that is, in the region indicated by numeral 32. Between the wall 10 and the tamper evidence skirt 6, an opening 38 having a substantially horizontally long rectangular shape is formed in the front view. A projecting piece 40 projecting downward is formed on the skirt wall 10 at the center in the circumferential direction of the opening 38.

  3 and FIG. 4 together with FIG. 1, the protruding piece 40 in the illustrated embodiment is generally rectangular, and the protruding piece 40 extends substantially vertically upward from its lower end edge. A slit 42 is formed. The two slits 42 extend to the upper end of the protruding piece 40, and the protruding piece 40 is divided into a strip-shaped central divided portion 44 located at the center in the circumferential direction and a strip-shaped both-side divided portion 46 located on both sides in the circumferential direction. Yes. The slit 42 does not necessarily extend to the upper end of the protruding piece 40, but preferably extends upward beyond at least the middle in the axial direction of the central dividing portion 44. As clearly understood by referring to FIG. 3, the central split 44 is somewhat longer than the side splits 46, extends downward beyond the lower edge of the side splits 46, and is also centrally split. The circumferential width of the portion 44 is somewhat smaller than the circumferential width of the side split portions 46. If desired, the central divided portion 44 and the both side divided portions 46 can be formed into an appropriate shape such as a shape that gradually becomes wider or narrower downward. Further, as clearly understood by referring to FIG. 4, the outer peripheral surface of the central dividing portion 44 is inclined radially inwardly downward, and the thickness of the central dividing portion 44 is directed downward. This is gradually reduced. As clearly shown in FIG. 3, in response to the fact that the central dividing portion 44 extends downward beyond the lower ends of the both side dividing portions 46, The upper end edge of the dent skirt 6 is displaced slightly below the portion facing the central dividing portion 44 from the portion facing the both side dividing portion 46, and the lower end edge of the central dividing portion 44 and the tamper evident hem There is substantially the same gap G1 between the upper end edge of the portion 6 and between the lower end edge of the side divided portion 46 and the upper end edge of the tamper evidence skirt portion 6.

  Continuing with reference to FIG. 1, non-breaking connecting pieces 48 a and 48 b located on both sides of the protruding piece 40 are also arranged in the opening 38. In the illustrated embodiment, the non-breaking connection piece 48a extends from the lower end edge of the skirt wall 10 to the one side in the circumferential direction (left side in FIG. 1) substantially horizontally, and the first tilting part 50a extends. An intermediate portion 52a that extends slightly downward from the end portion, and a second portion that extends substantially horizontally to the other circumferential side (right side in FIG. 1) following the intermediate portion 52a and is connected to the upper end portion of the tamper evidence skirt 6. It is comprised from the tilting part 54a. The non-breaking connecting piece 48b has a shape symmetrical with the non-breaking connecting piece 48a, and extends from the lower end edge of the skirt wall 10 to the other side in the circumferential direction (right side in FIG. 1) substantially horizontally. An intermediate portion 52b that extends slightly downward from the extended end of the tilting portion 50b, and extends substantially horizontally to one side in the circumferential direction (left side in FIG. 1) following the intermediate portion 52b, and is connected to the upper end of the tamper evidence skirt 6 It is comprised from the 2nd tilting part 54b made. If desired, the first tilting part 50a and the second tilting part 54a in the non-breaking connection piece 48a and the first tilting part 50b and the second tilting part 54b in the non-breaking connection piece 48b are not horizontal but somewhat. It can also be made to extend at an angle.

  A pedestal piece is further disposed in the opening 28 between the protruding piece 40 and each of the non-breaking connecting pieces 48a and 48b in the circumferential direction. More specifically, in the illustrated embodiment, the skirt wall side pedestal piece 56a protruding downward from the skirt wall 10 and the tamper evidence skirt 6 upward between the protruding piece 40 and the non-breaking connecting piece 48a. A protruding tamper evidence skirt side pedestal piece 58a is formed. Similarly, between the protruding piece 40 and the non-breaking connecting piece 48b, the skirt wall side pedestal piece 56b protruding downward from the skirt wall 10 and the tamper evidence skirt part side protruding upward from the tamper evidence skirt part 6 are provided. A base piece 58b is formed. The skirt wall side pedestal pieces 56a and 56b have a substantially inverted trapezoidal shape, and the tamper evidence skirt side side pedestal pieces 58a and 58b have a substantially trapezoidal shape. A gap G2 exists between the lower end edges of the skirt wall side pedestal pieces 56a and 56b and the upper end edges of the tamper evidence skirt side pedestal pieces 58a and 58b. The gap G2 is set to be the same as or slightly smaller than the gap G1 between the lower end edge of the central divided portion 44 and the both side divided portions 46 of the projecting piece 40 and the upper end edge of the tamper evidence skirt 6. Is convenient.

  In the injection molding or compression molding process of the container lid 2 as described above, when the molded container lid 2 is removed from the mold, due to the so-called unreasonable cause caused by the presence of the female thread 20, etc. The body 4 of the container lid 2 is forced downward in FIG. However, in the illustrated container lid 2, when the main body 4 of the container lid 2 is forced downward in FIG. 1, the lower end edges of the skirt wall side pedestal pieces 56a and 56b are tamper evident skirt side pedestal pieces 58a and 58b. This restricts the downward movement of the main body 4 in FIG. Therefore, it is avoided or suppressed that the lower end edge of the projecting piece 40 is pressed against the upper end edge of the tamper evidence skirt 6 with a considerably large force and the buckling is generated in the projecting piece 40.

  Continuing the description with reference to FIG. 5, the mouth-and-neck portion 60 of the container, which can be formed from an appropriate synthetic resin such as polyethylene terephthalate or glass, has a cylindrical shape as a whole, and its upper surface is opened. On the outer peripheral surface of the mouth-and-neck portion 60, there are male threads, more specifically, three male threads 62 extending over an angle range of 154 degrees, and a locking jaw section 64 positioned below the male threads 62. Is formed.

  When the container lid 2 is attached to the mouth-and-neck portion 60 and the mouth-and-neck portion 60 is sealed, the container lid 2 is fitted on the mouth-and-neck portion 60 and closed (clockwise as viewed from above in FIG. 5). The female thread 20 of the container lid 2 is screwed into the male thread 62 of the mouth-and-neck part 60 by rotating. The container lid 2 gradually descends with respect to the mouth-and-neck portion 60 in accordance with the progress of the screwing of the female thread 20 with respect to the male thread 62. When the container lid 2 is lowered with respect to the mouth-and-neck portion 60 until the state illustrated in FIG. 5, the inner annular ridge 12 and the outer annular ridge formed on the inner surface of the top wall 8 in the main body 4 of the container lid 2. 14 are respectively brought into close contact with the inner peripheral surface and the outer peripheral surface of the mouth-and-neck portion 60, whereby the mouth-and-neck portion 60 is sealed. The locking means 24 disposed on the inner peripheral surface of the tamper evidence skirt 6 of the container lid 2 elastically climbs over the locking jaw 64 of the mouth-and-neck 60 and is placed on the lower surface of the locking jaw 64. It can be locked.

  When opening the mouth-and-neck part 60, the container lid 2 is rotated in the opening direction (counterclockwise as viewed from above in FIG. 5), and the female thread of the container lid 2 with respect to the male thread 62 of the mouth-and-neck part 60 is rotated. The 20 screwing is gradually released. When the screwing is gradually released, the main body 4 of the container lid 2 is rotated and lifted in the opening direction, but the tamper evidence skirt 6 is locked by the locking means 24 on the locking neck portion 64 of the mouth and neck 60. As a result, the rise is prevented, and due to this, a considerable stress is generated in the breakable bridge portion 22 and the breakable bridge portion 22 is broken. After that, the main body 4 of the container lid 2 rises with the rotation in the opening direction, and is gradually separated upward from the tamper evidence skirt 6. As clearly understood by referring to FIG. 6 together with FIG. 5, when the body 4 is gradually separated from the tamper evidence skirt 6 upwardly, the first tilting portion 50a of the non-breaking connecting piece 48a and the non-breaking The second tilting portion 54b of the connecting piece 48b is pivoted clockwise in FIGS. 5 and 6 around the respective upper and lower ends, that is, tilted clockwise, while the second tilting portion 54a of the non-breaking connecting piece 48a. The first tilting portion 50b of the non-breaking connecting piece 48b is pivoted counterclockwise in FIGS. 5 and 6 around the lower end and the upper end of the non-breaking connecting piece 48b, that is, tilted counterclockwise. The tilt angles of the first tilt portions 50a and 50b and the second tilt portions 54a and 54b in 48a and 48b with respect to the vertical line are gradually changed. As clearly understood by referring to FIG. 7 together with FIGS. 5 and 6, when the female thread 20 of the container lid 2 is completely disengaged from the male thread 62 of the mouth and neck 60, the container The main body 4 of the lid 2 is detached from the mouth / neck portion 60. However, the main body 4 is separated from the container neck 60 because it continues to be connected to the tamper evidence skirt 6 that is still attached to the mouth neck 60 via the non-breaking connection pieces 48a and 48b. There is nothing.

  After the main body 4 of the container lid 2 is detached from the mouth-and-neck portion 60, the main body 4 is swung in the direction away from the mouth-and-neck portion 60 (counterclockwise in FIG. 7) to the state illustrated in FIG. In this case, first, as shown in FIG. 8, the lower end portion of the central dividing portion 44 of the projecting piece 40 comes into contact with the lower surface side of the locking jaw portion 64 of the mouth-and-neck portion 60, and thereafter the main body 2. Is gradually elastically deformed into an arcuate shape in response to the turning. The protruding piece 40 is divided into a central dividing portion 44 and both side dividing portions 46 by a slit 42, and in the illustrated embodiment, the central dividing portion 44 is relatively narrow and gradually decreases in thickness downward. Due to the reduction, the rigidity of the central divided portion 44 of the protruding piece 40 is considerably reduced as compared with the case where the protruding piece 40 is integrated without being divided, and the central divided portion 44 is as required. Elastically deformed. The lower end edge, that is, the front end edge of the both-side divided portion 46 is spaced downward or radially outward from the locking jaw portion 64, and the both-side divided portion 46 is not elastically deformed. When the turning of the main body 4 proceeds and the main body 4 exceeds a predetermined angular position, the central dividing portion 44 elastically climbs over the locking jaw portion 64 and is elastically restored to its original shape. The sound is generated. When the central dividing portion 44 gets over the locking jaw portion 64, as shown in FIG. 9, the tamper evidence skirt 6 rises somewhat with respect to the mouth-and-neck portion 60, so The outer peripheral surface of the lower end portion comes into contact with the upper surface side of the latching jaw portion 64, whereby the main body 4 is held at the position shown in FIG. 7, in other words, the clockwise rotation in FIG. 7 is prevented. Therefore, the consumer can eat and drink contents such as a soft drink present in the container without being obstructed by the presence of the main body 4.

  When the eating and drinking of the contents is interrupted on the way, the main body 4 held at the position shown in FIG. 7 is turned clockwise in FIG. At this time, the tamper-evidence skirt 6 is slightly lowered with respect to the mouth-and-neck portion 60, so that the both-side split portions 46 of the projecting piece 40 are moved downward or radially outward from the upper surface side of the locking jaw portion 64. The central divided portion 44 of the projecting piece 40 is elastically deformed to move over the locking jaw portion 64 elastically and move to the side surface side of the locking jaw portion 64. The container lid 2 is further rotated in the closing direction so as to be fitted on the mouth-and-neck portion 60, and then the main body 4 is rotated clockwise when viewed from above in FIG. The two female threads 20 are screwed together, and thus the container lid 2 is positioned again in the state shown in FIG. 5, and the mouth-and-neck part 60 can be temporarily sealed. In the illustrated embodiment, when the main body 4 is rotated clockwise in FIG. 7 and the main body 4 is re-fitted to the mouth-and-neck portion 60, the female formed on the inner peripheral surface of the skirt wall 10 of the container lid 2 in the illustrated embodiment. Since the thread 20 is notched in the specific region X (FIG. 2), the female thread 20 interferes with the male thread 62 of the mouth-and-neck part 60 and the main body 4 is fitted to the mouth-and-neck part 60. Inhibiting is sufficiently avoided.

2: Container lid 4: Main body of container lid 6: Tamper evidence hem 8: Top wall 10: Skirt wall 20: Female thread 22: Breakable bridge 24: Locking means 40: Protruding piece 42: Slit 44: Central division part 46: Both side division part 48a: Non-breaking connection piece 48b: Non-breakage connection piece 60: Mouth neck part 62: Male thread 64: Locking jaw part

Claims (6)

A synthetic resin container lid applied to a container in which a male thread and a locking jaw part positioned below the male thread are formed on an outer peripheral surface of the mouth and neck, the top wall and the top wall A cylindrical skirt wall that hangs down from the peripheral edge of the skirt wall, and an inner peripheral surface of the skirt wall is provided with a main body formed with a female thread that is screwed to the male thread, and is spaced apart in the circumferential direction. A cylindrical tamper that is connected to the skirt wall of the main body through a plurality of breakable bridging portions that are provided, and on the inner peripheral surface is provided locking means that is locked to the locking jaw. And a skirt wall of the main body, and projecting pieces projecting downward are disposed on the skirt wall of the main body, and the skirt wall of the main body and the tamper evidence are disposed on both sides in the circumferential direction of the projecting piece. When the main body is moved upward with respect to the tamper evidence hem and connected to the hem, the vertical line In the synthetic resin container closure unbroken connecting pieces are disposed with a tilt portion inclination angle is gradually made to change against,
A synthetic resin container lid, wherein the protruding piece is formed with at least one slit extending upward from a lower edge thereof.   The synthetic resin container lid according to claim 1, wherein the slit extends to an upper end of the protruding piece.   The projecting piece has two slits formed at intervals in the circumferential direction, and the projecting piece is divided into three divided portions located adjacent to each other in the circumferential direction. The synthetic resin container lid as described.   Of the three divided parts, the central divided part located at the center in the circumferential direction is longer than the both divided parts located on both sides in the circumferential direction, and extends downward beyond the lower edge of the divided parts on both sides. The synthetic resin container lid according to claim 3.   The synthetic resin container lid according to claim 3 or 4, wherein a circumferential width of the central divided portion is smaller than a circumferential width of the both side divided portions.   The outer peripheral surface of the central divided portion is inclined inward in the radial direction downward, and the thickness of the central divided portion is gradually reduced downward. A synthetic resin container lid according to claim 1.

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