JP2009286401A - Synthetic resin spout equipped with cylindrical cutter - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain a synthetic resin spout equipped with a cylindrical cutter which prevents screw threads and ratchets on the internal circumferential face of a spout cylinder from being damaged when the cylindrical cutter is relatively pressed into a spout body and which can hold the cylindrical cutter in the spout body. <P>SOLUTION: A plurality of locked ratchets 10-1, 10-2 and 10-3 are formed on the upper peripheral edge of the cylindrical cutter 4. A plurality of locking ratchets 20-1 and 20-2 are formed at the spout cylinder 11, which are locked to the locked ratchets along female threads 16. Ratchet passage notches 18 axially notched above the locked ratchets 10 are formed in the female threads 16. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a synthetic resin spout with a cylindrical cutter, and more particularly to a synthetic resin spout with a cylindrical cutter having a flange portion that can be welded to the peripheral edge of the opening of a container.

  Conventionally, as a synthetic resin spout for a container such as a paper pack laminated with a heat-synthetic synthetic resin film (hereinafter simply referred to as a spout), a flange for heat-sealing with the container is provided, and the flange is formed into a cylindrical shape. A spout in which a thread is formed on the outer peripheral surface of the extended pouring cylinder so that the cap can be screwed is widely adopted, and the container is formed by thermally fusing the peripheral edge of the opening of the container and the sealing surface of the flange. They are integrated to form a spout plug. In this type of spout, a spout that incorporates a cylindrical cutter that breaks the sealing material is known as a spout that is attached to a container whose container opening is sealed with a sealing material such as an aluminum foil laminated film. The cylindrical cutter is usually molded separately from the spout body, but the cylindrical cutter is molded integrally via a breakable connection bridge in a state of protruding coaxially below the spout body, and the number of molding steps Are known (see, for example, Patent Documents 1 and 2). When the spout is assembled, the connecting bridge is broken by pushing the cutter relative to the spout body in the axial direction, and the external thread formed on the outer peripheral surface of the cutter is replaced with the female thread formed on the inner peripheral surface of the spout body. The cylindrical cutter is screwed and held on the inner peripheral surface of the spout body. The inner screw formed on the inner peripheral surface of the spout body and the screw for screwing the cap formed on the outer peripheral surface of the spout are in a reverse screw relationship, and when the cap is rotated in the opening direction, the cylindrical cutter is removed from the spout body. By projecting and moving downward, the sealing material covering the container opening is broken, so that the sealing material can be broken and opened simultaneously with the opening of the cap.

  By the way, in the case where the spout body and the cylindrical cutter are integrally formed spouts, when the cap is excessively rotated in the opening direction during repeated opening and closing after opening, the cylindrical cutter comes off from the screwed connection with the spout body. There is a risk of falling inside. In order to avoid this, if the cylindrical cutter and the pouch body are molded separately, the cylindrical cutter is prevented from being detached below the inner peripheral surface of the pouch body so that the cylindrical cutter does not separate from the spout body. In the case of integral molding, the cylindrical cutter is pushed into the pouch body from below during assembly, so a stopper that obstructs the push is provided below the inner peripheral surface of the pouch body. It cannot be provided.

JP 2001-106248 A JP 2003-26219 A Japanese Patent Publication No. 4-1056

  Therefore, as an alternative, a ratchet is arranged on the outer peripheral surface of the mouth portion of the cylindrical cutter, and a locking ratchet that engages with the ratchet is provided on the lower portion of the inner peripheral surface of the pouch body. It can be considered that when the cutter is lowered to a predetermined position, it is engaged to prevent the cutter blade from being detached. However, when a ratchet that is a projection is provided on the outer peripheral surface of the top of the cylindrical cutter, the ratchet formed on the cylindrical cutter during assembly exceeds the thread formed on the inner peripheral surface of the spout cylinder of the spout body. , Interfering with the screw thread and scratching the screw thread, or the ratchet itself is damaged and deformed, dust is generated and the opening torque becomes high, and it becomes impossible to prevent the cutter blade from being detached. May occur.

  Therefore, the present invention provides a spout with a cylindrical cutter in which a cylindrical cutter and a spout body are integrally formed, and when the cylindrical cutter is relatively pushed into the spout body, the spout body has a pour cylinder inner peripheral surface. Synthetic resin with a cylindrical cutter that can be assembled without damaging the formed female thread and ratchet itself, and can be securely held in the spout body without dropping the cylindrical cutter into the container at the time of opening. The purpose is to provide a spout.

A synthetic resin spout with a cylindrical cutter of the present invention that solves the above-mentioned problems is a spout body having a flange that can be welded to a container body, a pouring cylinder that extends upward from the inner peripheral edge of the flange, It consists of a cylindrical cutter integrally formed through a breaking bridge below, and a cap screw is formed on the outer peripheral surface of the spout cylinder of the spout body, and the cap screw and reverse screw are formed on the inner peripheral surface. In a spout made of synthetic resin in which a female screw having a relationship is formed and a male screw that is screwed with the female screw is formed on the outer peripheral surface of the cylindrical cutter, A plurality of latching ratchets projecting inward in the circumferential direction along the mountain are formed, a latched ratchet that latches with the latching ratchet is formed on the upper outer periphery of the cylindrical cutter, and the female screw The thread is characterized in that formed by ratchet passed cutout formed by cutting off the thread at the upper position of the locking ratchet of the tubular cutter in the axial direction.
With the above configuration, when the cylindrical cutter is pushed into the dispensing cylinder, the latched ratchet passes through the female ratchet passage notch formed in the dispensing cylinder. Can be assembled without interference. Moreover, since the said latching ratchet and the to-be-latched ratchet engage at the time of opening and closing, it can prevent reliably that a cylindrical cutter slips out from a spout main body.

Also, in the synthetic resin spout with a cylindrical cutter, the male screw of the cylindrical cutter and the female screw formed on the inner peripheral surface of the extraction cylinder are formed as multi-threaded screws, and the locked ratchet is It is desirable that a plurality of multi-thread screws are formed corresponding to the number of threads, and a plurality of the locking ratchets are formed for each thread of the multi-thread screws.
By comprising in this way, the lead angle of the screw thread of a cylindrical cutter and an extraction cylinder inner peripheral surface can be formed larger than the lead angle of the screw screw of a cap and an extraction cylinder outer peripheral surface, and a cylindrical cutter The protrusion can be made large and the sealing material can be surely broken, and by providing a latched ratchet for each multi-thread screw, the cylindrical cutter is more stably engaged with the dispensing cylinder. Can be stopped.

Further, the locking ratchet includes a lower release prevention locking ratchet formed at a lower portion in the axial direction of the female screw that engages with the locked ratchet during rotation in the opening direction, and the lower release prevention engagement It is desirable to be composed of a combination of an upper separation prevention latching ratchet that engages with the latched ratchet at the time of rotation in the closing direction formed axially above the stop ratchet.
By configuring in this way, it is possible to prevent the cylindrical cutter from falling into the container, and to completely prevent accidents in which the cylindrical cutter accidentally drops together with the content liquid at the time of content liquid extraction. Can do.

The synthetic resin spout with a cylindrical cutter of the present invention can be assembled without interfering with the latched ratchet and the screw thread when the cylindrical cutter is pushed into the dispensing cylinder. , The female screw of the dispensing cylinder and the latched ratchet will not be damaged or deformed, dust can be prevented from being broken and the opening torque can be prevented from rising, and the cutter blade can be reliably prevented from coming off. .
Moreover, since the protrusion amount of a cylindrical cutter can be enlarged with a small rotation angle by the structure of Claim 2, a sealing material can be fractured | ruptured reliably in the state from which the cap removed from the spout. In addition, by providing a latched ratchet for each multi-thread screw, the latching position of the latched ratchet with the female screw on the inner peripheral surface of the dispensing cylinder is equally spaced in the circumferential direction, and the cylindrical cutter is poured out. It can be stably locked to the cylinder.
Furthermore, according to the configuration of claim 3, it is possible to prevent the cylindrical cutter from falling into the container, and it is possible to completely prevent an accident that the cylindrical cutter accidentally drops together with the content liquid from the spout when the content liquid is poured. Can be prevented.

Embodiments of a spout according to the present invention will be described below in detail based on the drawings.
FIG. 1 is a bird's-eye view of a spout according to this embodiment in which a spout body and a cylindrical cutter are integrally formed, FIG. 2 is a front view thereof, FIG. 3 is a front sectional view thereof, FIG. 4 is a plan view thereof, FIG. FIG. 6 is a developed view of the inner peripheral surface of the spout body, in which the spout body and the cylindrical cutter are spread in a plane, and FIG. 6 is a developed view of the inner surface of the spout body. The engaged ratchet of the cutter and the upper position of the male screw are indicated by broken lines. In the spout 1 of this embodiment, the spout body 3 and the cylindrical cutter 4 are integrally formed, the cylindrical cutter 4 has a cutter blade 9 at the lower end, and projects coaxially below the flange of the spout body 3. Are connected via a plurality of connection bridges 5 that can be broken. The cylindrical cutter 4 is formed with a male screw 6 which is screwed with a female screw 16 formed on an inner peripheral surface of a spout cylinder 11 of the spout body 3 described later on the outer peripheral surface of the cylindrical cutter 4. The female screw 16 is screwed to constitute a cylindrical cutter operating screw. The cylindrical cutter operating screw is formed as a multi-threaded screw (three-threaded screw in this embodiment).

  A total of three latched ratchets 10-1, 10-2, 10-3 addressed to one of the strips are formed on the outer peripheral edge of the cylindrical cutter 4 at regular intervals in the circumferential direction (FIG. 4). ~ 5). These locked ratchets 10-1 to 3 are arranged on the extension line of the start end of the male screw 6, as schematically shown in FIG. 5 by developing the main portions of the extraction cylinder 11 and the cylindrical cutter 4 at 360 °. When the cylindrical cutter 4 is rotated in a state where the cylindrical cutter 4 is pushed into the dispensing cylinder, the male screw 6 and the female screw 16 are screwed together, and the cylindrical cutter 4 is attached to the spout body 3. On the other hand, it is formed to engage with the locking ratchet 20 when it moves downward. The shape of the latched ratchet is basically a rectangular shape that can be latched with a latching ratchet described later in the forward and reverse rotation directions, but prevents unreasonable punching at the time of die cutting after molding with the left and right split molds. Therefore, as shown in FIG. 4, the locked ratchets 10-2 and 10-3 are formed with slanted wall surfaces that become the locking surfaces in the forcibly removing direction, and the bottom surfaces of these locked ratchets are poured out. Inclined at substantially the same lead angle as the female screw 16 of the tube.

  On the other hand, on the inner peripheral surface of the cylindrical cutter, vertical staggered ratchet teeth 7 are formed to protrude. When the ratchet teeth 7 are rotated in the direction of opening the cap, the ratchet teeth 7 are engaged with a plurality (four in the illustrated embodiment) of ratchet pieces 44 formed by hanging from the top wall of the cap, which will be described later. The cylindrical cutter 4 is protruded downward by the screw action, and the sealing material sealing the container opening is broken to open the container. In the figure, 8 is a reinforcing rib formed in a cross shape across the inner peripheral surface of the cylindrical cutter.

  The spout body 3 has a pour tube 11 that is open at the top and bottom. A flange 12 is formed at the lower end of the pour tube outer peripheral surface, and a tamper evidence band (hereinafter, referred to as a cap 40) formed on the cap 40 thereon. A ratchet pawl 13 that engages with a ratchet piece 49 projectingly formed on the inner peripheral surface of the TE band 43, a TE band drop prevention jaw 14 is formed on the upper portion thereof, and a male screw 15 for cap engagement is formed thereon. ing. Further, on the inner peripheral surface of the dispensing cylinder 11, as shown in a flattened view in FIG. 5, three female screws 16-1 to 16-3 that mesh with the male screw 6 of the cylindrical cutter 4 to constitute a cutter operating screw. 3 is formed in the direction opposite to the male screw 15 on the outer peripheral portion.

  As shown in FIGS. 5 and 6, the female screw 16 of the dispensing cylinder has an arrow 30-1 corresponding to a portion located above the latched ratchets 10-1 to 3 formed on the cylindrical cutter 4. As shown in .about.3, the threaded ratchet passage notch 18 is formed by notching the thread in the axial direction. Thereby, when the cylindrical cutter 4 is relatively pushed into the dispensing cylinder 11 when the spout is assembled, it is possible to avoid the locked ratchets 10-1 to 3-3 from interfering with the dispensing cylinder female screw 16. Damage and deformation of the thread and the latched ratchet can be prevented, and an increase in torque can be suppressed.

  In addition, a plurality of locking ratchets 20 that are engaged with the locked ratchet are protruded from the inner peripheral surface of the dispensing cylinder along the thread of the female screw 16. In this embodiment, as shown in FIG. 5 and FIG. 6, the latching ratchet 20 is formed by six for each screw along each screw thread of the female screw 16 that is a three-thread screw. The lower three pieces are the lower release prevention latching ratchet 20-1, and the remaining three pieces are the upper separation prevention latching ratchet 20-2. The lower release prevention latch ratchet 20-1 is formed on the lower side in the axial direction of the female screw 16, and prevents the cylindrical cutter from rotating and falling into the container after the cap is opened. The screw rising side is a locking surface 21 with the locked ratchet 10, and the screw lowering side surface is inclined to become the flank 22 of the locked ratchet 10. On the other hand, the upper detachment prevention latching ratchet 20-2 is in a state where the cylindrical cutter is excessively rotated when it is further resealed after opening, and the cylindrical cutter is poured out when the container is tilted after opening. Is formed on the upstream side of the female screw 16, the screw lowering side is a locking surface 21 with the locked ratchet 10, and the screw rising side is inclined. Thus, the flank 22 of the latched ratchet 10 is formed. In this embodiment, three lower release prevention latching ratchets 20-1 and three upper release prevention latching ratchets 20-2 are provided for each of the strips for reliable locking. There is no limitation, and at least one is sufficient.

7 shows a state in which a cap is screwed to the spout formed as described above, and FIG. 8 shows a state in which the cap 40 is removed from the spout body after opening from the state shown in FIG.
The cap 40 according to the present embodiment has a top wall 41 and a skirt wall 42, and has a TE band 43 (FIG. 7) at the lower end of the skirt wall 42 via a weakened portion. The top wall 41 hangs downward so that the ratchet piece 44 is engaged with the ratchet teeth 7 formed on the cylindrical cutter so that the engagement surface is positioned on the same circumference as the ratchet teeth 7. Are formed at equal intervals. Further, on the inner peripheral surface of the skirt wall 42, a female screw 45 that is screwed with the male screw 15 formed on the outer peripheral surface of the spout body 3 is formed. The weakened portion connecting the skirt wall 42 and the TE band 43 is composed of a plurality of bridges 46.

  In order to attach the spout formed as described above to the container body, the cap 40 is screwed into the spout 1 in the state shown in FIGS. 1 to 4, and the cylindrical cutter 4 is placed in the spout cylinder of the spout body 3 in this state. The connection bridge 5 is broken by forcibly pushing it into the outer peripheral surface of the cylindrical cutter 4 and the spout body 3 on the inner peripheral surface of the spout body 3 as shown in FIG. The female screw 16 is screwed. When the cylindrical cutter 4 is forcibly pushed into the spout cylinder of the spout body 3 from the state schematically shown in FIG. 5, the latched ratchets 10-1 to 10-3 protruding from the upper outer peripheral edge of the cylindrical cutter. Over the thread of the female screw 16-1 to 3 formed on the inner peripheral surface of the spout body. In the present invention, as shown in the schematic views of FIGS. Since the ratchet passage notch 18 is provided at an axial position through which the ratchets 10-1 to 3 pass, the latched ratchet 10 does not interfere with the threads of the female screws 16-1 to 3 and is inserted smoothly. The screw thread and the latched ratchet 10-1 to 3 are not damaged.

  In this way, as shown in FIG. 7, the cylindrical cutter 4 is inserted into the extraction cylinder 11 of the spout body 3. In this state, as shown by broken lines in the schematic diagram of FIG. 6, the latched ratchets 10-1 to 3 are positioned above the start ends of the three-thread screws 16-1 to 16-and the caps are opened in the opening direction. By rotating (counterclockwise), the latched ratchets 10-1 to 10-3 move (rotate) in the direction indicated by the arrow 25, respectively, and are positioned above the three-thread screws 16-1 to 16-3. It will interfere with the stop ratchet 20.

  In this state, a spout-equipped container is obtained by welding the flange 12 of the spout body 3 to a container opening (not shown) in a container opening sealed with a sealing material. In order to open the sealed container filled with the content liquid, the ratchet piece 44 provided by hanging from the top surface of the cap is rotated by rotating the cap 40 in the opening direction (counterclockwise direction) from the state of FIG. It engages with ratchet teeth 7 formed on the inner peripheral surface of the cylindrical cutter 4 and rotates the cylindrical cutter 4 counterclockwise. Since the screw angle between the cylindrical cutter 4 and the spout body 3 is opposite to the screw angle between the cap and the cylindrical body, the cylindrical cutter rotates downward as the cap is opened. Protruding, the cutter blade 9 breaks and opens the sealing material adhered to the container body, and the cap 40 is completely detached from the spout body 3 as shown in FIG. 8, and the cylindrical cutter 4 is spouted. A predetermined amount is projected downward from the main body, and the content liquid can be poured out. In this embodiment, the cap and the extraction cylinder are screwed together with a single thread, but the extraction cylinder 11 and the cylindrical cutter 4 are screwed into a triple thread. The lead angle is large, and the axial displacement of the cylindrical cutter is larger than the axial displacement of the cap with respect to the rotation of the cap.

In the opening process from the state shown in FIG. 7 to the state shown in FIG. 8, the latched ratchets 10-1 to 3 formed on the outer peripheral surface of the top of the cylindrical cutter 4 are rotated counterclockwise. 6 is moved from the position indicated by the broken line above the triple thread in FIG. 6 in the direction indicated by the arrow 25, and the upper separation preventing latching ratchet 20-2 formed on the female screw on the inner peripheral surface of the dispensing cylinder in the middle. However, since the ratchet is inclined at the upstream side to form a flank, the ratchet passes through the lower release prevention latch without being locked by the upper release prevention latch ratchet 20-2. When the position before the position where the ratchet 20-1 is formed is reached, the cap is completely detached from the spout body 3 as shown in FIG. 8, and the cylindrical cutter 4 is held at that position. In that state, the breaking of the sealing material is already finished with the cylindrical cutter. Since the lower detachment prevention latching ratchet 20-1 has a locking surface with the upstream side standing, it is possible to reliably prevent the cylindrical cutter from detaching from the dispensing cylinder and falling downward.
In the present embodiment, three lower side release prevention latching ratchets 20-1 are provided for each strip. If the cylindrical ratchet is strongly rotated and the latched ratchet is only one lower side release prevention unit. Even if the stop ratchet 20-1 is overcome, it is for safety so that it can be locked by the next lower side release prevention locking ratchet 20-1.

  After the end of pouring, the cap ratchet piece 44 and the ratchet of the cylindrical cutter can be rotated even when the cap is rotated in the closing direction (clockwise) when the cap is screwed again into the pouring cylinder while the cylindrical cutter 4 is lowered. The teeth 7 are designed so that they are hardly locked, and the cylindrical cutter 4 does not return to the original position once it is opened, but if the ratchet piece 44 and the ratchet teeth 7 are slightly Even if the cylindrical cutter is about to rise due to interference, the latched ratchet is latched with the upper release prevention latching ratchet 20-2 and prevents further elevation. Even if the upper release prevention latching ratchet 20-2 is not provided, in the closed state, the cylindrical cutter is prevented from rising by the top surface of the cap, so the cylindrical cutter will not be released. In the state, for example, when the container is tilted and the content liquid is poured out, if the cylindrical cutter is in a rotation-free state, the cylindrical cutter is inadvertently rotated and unscrewed from the dispensing cylinder and falls together with the content liquid. In order to prevent this, an upper separation prevention latching ratchet 20-2 is provided.

  The synthetic resin spout with a cylindrical cutter of the present invention has a ratchet that allows the spout body and the cylindrical cutter to be integrally formed, and also prevents the cylindrical cutter from moving in the axial direction in the dispensing cylinder. Can be assembled without pinching the female thread and the locking ratchet, and it is possible to reliably prevent the cylindrical cutter from being detached from the dispensing cylinder, so that the spout body and the cylindrical cutter are integrally molded. This increases the productivity and quality of resin spouts and has high industrial applicability.

It is a bird's-eye view of the spout with a cylindrical cutter which concerns on embodiment of this invention. It is the front view. It is the front sectional drawing. FIG. It is the expansion | deployment schematic diagram of the extraction cylinder and cylindrical cutter which show the relationship between the internal thread of the extraction cylinder inner surface, a latching ratchet, and the latched ratchet of a cylindrical cutter. It is an expansion | deployment schematic diagram which shows the relationship between the internal thread of the extraction | pouring cylinder inner peripheral surface in the assembled state, a latching ratchet, and the latched ratchet of a cylindrical cutter. It is a partially broken front view of the spout with a cylindrical cutter which concerns on embodiment of this invention of the state assembled | attached and attached with the cap. It is a partially broken front view showing the opened state.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Synthetic resin spout with cylindrical cutter 3 Spout body 4 Cylindrical cutter 5 Connection bridge 6 Male screw 7 Ratchet tooth 8 Reinforcement rib 9 Cutter blade 10-1 to 3 Locked ratchet 11 Extraction cylinder 12 Flange 13 Ratchet claw 15 Cap engaging male screw 16 Female screw 18 Ratchet passage notch 20 Locking ratchet 20-1 Lower release prevention locking ratchet 20-2 Upper release prevention locking ratchet 21 Locking surface 22 Relief surface 25 Arrow 40 Cap 41 Top wall 42 Skirt wall 43 TE band 44 Ratchet piece 45 Female thread

Claims (3)

  A spout body having a flange that can be welded to the container body, a spout body extending upward from the inner peripheral edge of the flange, and a cylindrical cutter integrally formed below the pouring cylinder via a break bridge, A screw for cap screwing is formed on the outer peripheral surface of the spout cylinder of the spout body, a female screw having a reverse screw relationship with the screw for cap screw is formed on the inner peripheral surface, and the outer peripheral surface of the cylindrical cutter is formed on the outer peripheral surface of the cylindrical cutter. Is a synthetic resin spout formed with a male screw threadedly engaged with the female screw, and a plurality of locking ratchets protruding inward in the circumferential direction along the thread of the female screw are formed on the dispensing tube. A latched ratchet that is engaged with the latching ratchet is formed on the upper outer periphery of the cylindrical cutter, and the thread of the female screw is positioned above the latched ratchet of the cylindrical cutter. The above Cylindrical cutter with plastic spout, characterized in that mountain formed by ratchet passing notch formed by notching the axial direction.   The male screw of the cylindrical cutter and the female screw formed on the inner peripheral surface of the dispensing cylinder are formed as a multi-threaded screw, and a plurality of the latched ratchets are formed corresponding to the number of threads of the multi-threaded screw. 2. The synthetic resin spout with a cylindrical cutter according to claim 1, wherein a plurality of the locking ratchets are formed for each thread of the multi-threaded screw.   The locking ratchet includes a lower release prevention locking ratchet formed at a lower portion in the axial direction of the female screw that engages with the locked ratchet during rotation in the opening direction, and the lower release prevention locking ratchet 3. With a cylindrical cutter according to claim 1 or 2, comprising a combination of an upper detachment prevention latching ratchet that engages with the latched ratchet at the time of rotation in the closing direction formed axially above. Synthetic resin spout.

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