JP5191295B2 - Synthetic resin spout with cylindrical cutter - Google Patents

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. In the spout, the inner screw formed on the inner peripheral surface of the spout main body and the screw for screwing the cap formed on the outer peripheral surface of the spout have a reverse screw relationship, and when the cap is rotated in the opening direction, a cylindrical cutter When the cap protrudes downward from the spout body, 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.

  Such a spout with a cylindrical cutter has a cylindrical cutter formed separately from the spout main body and fitted into the spout main body (for example, Patent Document 1), and the cylindrical cutter coaxially below the spout main body. It is molded integrally through a connection bridge that can be broken in a protruding state, and after molding, the tubular cutter is pushed into the spout body, so that the connection bridge is broken and screwed into the spout body for assembly. Is known (see, for example, Patent Documents 2 and 3).

No. 4-1056 JP 2001-106248 A JP 2003-26219 A

  By the way, as described above, the cylindrical cutter rotates in the direction opposite to the cap by opening the cap in the opening direction and protrudes downward to break the sealing material, and is held in that position even after the cap is removed. The cap is normally held in the lower position even when the cap is repeatedly attached and detached. However, when the cap is repeatedly opened and closed after being opened, if the cap is excessively rotated in the opening direction or if an impact or axial load is applied to the cylindrical cutter, the cylindrical cutter may fall into the container. is there. In order to avoid this, the cylindrical cutter and pouch body are molded separately, and a stopper such as an undercut is formed below the inner peripheral surface of the spout body to prevent the tubular cutter from being detached. However, in the case of integral molding as described in Patent Document 2 or 3, since the cylindrical cutter is pushed into the pouch body from below during assembly, the inner peripheral surface of the pouch body is below There is no stopper part to obstruct the pushing.

  Therefore, in the present invention, in the spout with a cylindrical cutter, the cylindrical cutter after opening can be reliably locked in the spout body, and the impact force and the pressing force to the cylindrical cutter due to repeated mounting and dismounting of the cap, etc. Even if it is added, the cylindrical cutter can be surely prevented from falling into the container, and the cylindrical cutter and the spout body can be separately molded or integrally molded. Another object of the present invention is to provide a synthetic resin spout with a cylindrical cutter provided with a cylindrical cutter locking means applicable to the above.

  A spout made of synthetic resin with a cylindrical cutter according to the invention of claim 1 that solves the above-mentioned problem, a spout main body having a flange that can be welded to a container main body, and an extraction cylinder that extends upward from the inner peripheral edge of the flange, It consists of a cylindrical cutter screw-fitted to the inner peripheral surface of the dispensing cylinder. Cap screwing screws are formed on the outer peripheral surface of the dispensing cylinder of the spout body, and the cap screwing screw is opposite to the inner peripheral surface. In a spout made of synthetic resin in which a female screw having a screw relation is formed and a male screw is formed on the outer peripheral surface of the cylindrical cutter to be engaged with the female screw, the screw on the inner peripheral surface of the dispensing cylinder The groove extends along the thread at a position corresponding to or close to the pressure side flank at the lower end of the thread or on the extension of the lower end of the thread. Ne consisting of elongated ridges A stopper is formed on the outer peripheral edge of the cylindrical cutter, and a latching ratchet that latches with the screw stopper is formed, and the latching ratchet is latched with the screw stopper. The cylindrical cutter is prevented from being detached downward.

According to a second aspect of the present invention, in the synthetic resin spout according to the first aspect, the thread of the female screw is axially above the position where the screw-shaped stopper is formed in the dispensing tube. A locking ratchet protruding inward in the circumferential direction along the pressure side flank is formed in a screw groove, and the locking ratchet is engaged with the locked ratchet formed on the outer peripheral surface of the cylindrical cutter. It is characterized by being.

The invention according to claim 3 is the synthetic resin spout with a cylindrical cutter according to claim 2, wherein the locking ratchet is engaged with the locked ratchet during rotation in the opening direction. A lower release prevention latching ratchet formed in an axially lower portion of the upper side, and an upper side engaged with the locked ratchet during rotation in the closing direction formed axially above the lower release prevention latching ratchet It consists of a combination of a separation prevention latching ratchet.
Furthermore, the invention according to claim 4 is the synthetic resin spout with a cylindrical cutter according to any one of claims 1 to 3, wherein the male screw of the cylindrical cutter is formed on the inner peripheral surface of the extraction cylinder. The female screw formed is a multi-threaded screw, the latched ratchet is formed in a plurality corresponding to the number of threads of the multi-threaded screw, and the locking ratchet is provided for each thread of the multi-threaded screw. One or more of each is formed.

  Furthermore, the invention according to claim 5 is the synthetic resin spout according to any one of claims 1 to 4, wherein the cylindrical cutter is connected to a spout body via a bridge that can be broken below the pouring cylinder. The spout body and the cylindrical cutter are assembled by being screwed onto the inner peripheral surface of the dispensing cylinder by breaking the bridge and moving the sputter body relative to the axial direction. It is characterized by.

  According to the first aspect of the present invention, the spout made of synthetic resin with the cylindrical cutter is engaged with the cylindrical cutter when the cylindrical cutter locked to the lower position of the extraction cylinder after opening is excessively rotated. Since the stop ratchet is locked with a screw-shaped stopper made of ridges formed on the inner peripheral surface of the dispensing cylinder, further rotation is prevented and downward movement is prevented, so the cylindrical cutter is the spout body Can be reliably prevented from coming out downward. Since the threaded stopper is formed in the thread groove along the pressure side flank of the thread of the cylindrical cutter, the type in which the cylindrical cutter is fitted to the dispensing cylinder from above and the type to be fitted from below. Any of them can be applied. When the upper edge of the cylindrical cutter is lowered until it reaches the screw-like stopper position, the latched ratchet formed on the upper outer periphery of the cylindrical cutter easily engages with the screw-like stopper, It is possible to reliably prevent downward withdrawal.

Further, according to the configuration of claim 2, for example, the locking ratchet and the locked ratchet are locked in a state where the cylindrical cutter is lowered to a position where the breaking of the sealing material is completed. Over-rotation can be effectively prevented, and even if there is excessive rotation or push-in and the locked ratchet gets over the locking ratchet, the threaded stopper and the locked ratchet are engaged. Therefore, the cylindrical cutter can be prevented from detaching twice.
According to the configuration of claim 3, the locking ratchet includes a lower release prevention latching ratchet formed in an axially lower portion of the female screw, and an axially upper side of the lower release prevention locking ratchet. By constituting the combination of the upper release prevention locking ratchet that engages with the locked ratchet during rotation in the closing direction formed, it is possible to prevent the cylindrical cutter from falling into the container and to inject the content liquid The accident that the cylindrical cutter inadvertently drops together with the content liquid from the spout can be completely prevented.

Furthermore, according to the configuration of claim 4, the lead angle of the threaded screw between the cylindrical cutter and the extraction cylinder inner peripheral surface can be formed larger than the lead angle of the screw threaded between the cap and the extraction cylinder outer peripheral surface, The protruding amount of the cylindrical cutter can be increased so that the sealing material can be surely broken, and by providing a latched ratchet for each multi-thread screw, the cylindrical cutter can be poured out more stably. It can be locked to the tube.
Furthermore, according to the configuration of claim 5, the present invention can be applied to a cylindrical cutter and a spout body integrally formed, and the cylindrical cutter can be fitted only to the spout body from below. Even with a synthetic resin spout with a cutter, the cylindrical cutter can be reliably prevented from being detached with a simple configuration.

Embodiments of a spout according to the present invention will be described below in detail with reference to 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, and FIG. FIG. 6 is a developed view of the inner peripheral surface of the spout body. FIG. 6 is a developed view of the inner peripheral surface of the spout body. The engaged ratchet of the cylindrical cutter and the upper position of the male screw in the assembled state after being pushed in are indicated by broken lines. In the spout 1 of the present 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 12 of the spout body 3. They are connected via a plurality of connection bridges 5 that can be broken in a state. 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, and 10-3 are formed on the outer periphery of the upper portion of the cylindrical cutter 4 at regular intervals in the circumferential direction for each one thread. (FIGS. 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 rectangular so that it can be latched with the latching ratchet described later in both the forward and reverse rotation directions. In order to prevent this, as shown in FIG. 4, the locked ratchets 10-2 and 10-3 are formed with slanted wall surfaces that serve as locking surfaces in the forcing direction, and the bottom surfaces of all these locked ratchets Is inclined at substantially the same lead angle as the female screw 16 of the dispensing tube.

  On the other hand, on the inner peripheral surface of the cylindrical cutter, vertical staggered ratchet teeth 7 are formed to protrude. A plurality (four in the illustrated embodiment) of ratchet pieces 44 (FIGS. 7 and 8) are formed by the ratchet teeth 7 hanging from a top wall 41 of the cap described later when the cap 40 is rotated in the opening direction. ), 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 that is formed on the inner peripheral surface of a TE band 43), a TE band drop prevention jaw 14 on the upper part, and a male screw 15 for screwing a cap on the upper part. 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 for screwing the cap on the outer periphery.

  As shown in FIGS. 5 and 6, the female screw 16 of the pouring cylinder in a state where the spout body 3 and the cylindrical cutter 4 are integrally formed is a latched ratchet 10-1 to 3 formed on the cylindrical cutter 4. As shown by arrows 30-1 to 30-3 corresponding to the portion located above the threaded portion, the threaded ratchet notch 18 is formed by axially notching the thread. 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 and dropping of the cylindrical cutter can be suppressed.

  In addition, a threaded stopper 19 and a locking ratchet 20 that are engaged with the locked ratchet are formed to protrude from the inner peripheral surface of the dispensing cylinder along the pressure side flank 31 of the thread of the female screw 16. . The screw-shaped stopper 19 is provided to prevent the cylindrical cutter from dropping downward. In the present embodiment, the screw-shaped stopper 19 is formed in a convex shape adjacent to the lower end of the thread 16-1 to 3-3. Has been. That is, in this embodiment, as shown in FIGS. 5 and 6, the screw-like stopper 19 is provided on the extension of the locking ratchet 20 and is essentially the end of the thread beyond the passage hole 18 of each of the three threads. It is provided in the thread groove along the pressure side flank at the location where the portion is located, and the thread at that position is eliminated to save material. The screw-like stopper 19 is formed by filling the gap between two lower release prevention latching ratchets located at the end of the female screw in the prior invention (Japanese Patent Application No. 2008-137672) previously provided by the present applicant. This corresponds to a locking surface that is sufficiently longer than the ratchet in the same way as the thread, and when the locked ratchet of a cylindrical cutter, which will be described later, reaches this position, it is between the locked ratchet and the thread. This is for eliminating the backlash and ensuring the locking. Thereby, when the cap is resealed after opening, even if the cylindrical cutter is impacted or pressed from above, the latched ratchet of the cylindrical cutter is locked to the screw-shaped stopper 19, and the cylindrical cutter Since the screw is engaged with the upper surface of the screw-shaped stopper, the cylindrical cutter can be reliably prevented from falling.

  In this embodiment, as shown in FIG. 5 and FIG. 6, four locking ratchets 20 are formed for each screw along each screw thread of the female screw 16 that is a triple thread, and one of them is 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-side release prevention latching ratchet 20-1 is formed on the most recently raised side of the screw-shaped stopper 19 of the female screw 16, and after the cap is opened, the cylindrical cutter rotates and falls into the container. In order to prevent this, the screw rising side is a locking surface 21 with the locked ratchet 10, and the screw lowering side surface is inclined to become a flank 22 of the locked ratchet 10. On the other hand, the upper detachment prevention latching ratchet 20-2 breaks the sealing material after opening, and the cylindrical cutter 4 protruding downward is raised from its position for some reason after opening, and then opened. It is for preventing the liquid from dropping out from the dispensing tube when the container is tilted with a stopper, and is formed on the rising side of the female screw 16 on the lower side of the lower release prevention locking ratchet 20-1, The screw lowering side is a locking surface 21 with the locked ratchet 10, and the screw rising side is inclined to become the flank 22 of the locked ratchet 10. In the present embodiment, one lower release prevention latch ratchet 20-1 is provided for each line, and three upper release prevention latch ratchets 20-2 are provided for each line in order to securely lock each. However, the present invention is not necessarily limited to this, and at least one is sufficient.

FIG. 7 shows the synthetic resin spout 1 with a cylindrical cutter according to the present embodiment in a state in which the cylindrical cutter 4 and the spout body 3 are assembled. Normally, as shown in FIG. Provided while wearing. FIG. 9 shows a state where the cap 40 is removed from the spout body 3 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. 8) 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.

  Thus, as shown in FIGS. 7 and 8, 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 locked ratchets 10-1 to 10-3 are positioned above the start ends of the three-thread screws 16-1 to 16-3, and the cap 40 is opened. By rotating in the direction (counterclockwise), the latched ratchets 10-1 to 10-3 move (rotate) in the direction indicated by the arrow 25, respectively, so that they are positioned above the three-thread screws 16-1 to 3-3, It will interfere with the locking 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 to hang down from the top surface of the cap by rotating the cap 40 in the opening direction (counterclockwise) 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 lead angle of the screwing of the cylindrical cutter 4 and the dispensing cylinder 11 is opposite to that of the cap and the dispensing cylinder 11, the cylindrical cutter 4 rotates as the cap is opened. While projecting downward, 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. No. 4 protrudes downward by a predetermined amount from the spout 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 accompanying the rotation of the cap.

  In the opening process from the state shown in FIG. 8 to the state shown in FIG. 9, the latched ratchets 10-1 to 3-3 formed on the upper outer periphery 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 to the direction indicated by the arrow 25, and while being lowered by a certain distance, the upper separation prevention locking formed first on the female screw on the inner peripheral surface of the dispensing cylinder The ratchet 20-2 engages with the ratchet 20-2. However, since the ascending side is inclined and forms a flank, the ratchet 20-2 passes through the lower side without being locked by the upper side release prevention locking ratchet 20-2. When the position before the position where the separation preventing latching ratchet 20-1 is formed is reached, the cap is completely detached from the spout body 1 as shown in FIG. 9, and the cylindrical cutter 4 is held in that position. In that state, the sealing material has already been broken by the cylindrical cutter. Since the lower release prevention latching ratchet 20-1 has a locking surface with a raised side, the latched ratchet is engaged with the lower release prevention latching ratchet 20-1, and the cylindrical cutter is poured. It is prevented from detaching from the outlet tube and falling downward.

  However, if the cylindrical cutter is excessively rotated, the locked ratchet 10 may get over the lower release prevention latch ratchet 20-1. However, in this embodiment, the lower release prevention latch ratchet 20- Since a screw-shaped stopper 19 is further formed on the downstream side of 1, even if the lower-side release prevention locking ratchet 20-1 is overcome, the screw-shaped stopper 19 on the downstream side is locked to prevent rotation. Is done. Further, since the screw-shaped stopper 19 is formed over a predetermined length range, even when an unexpected axial load is applied to the cylindrical cutter 4, the male screw 6 of the cylindrical cutter 4 is formed on the upper surface of the screw-shaped stopper 19. It is possible to securely receive the lower surface, and it is possible to reliably prevent the cylindrical cutter from dropping even if there is some backlash between the threads. In the present embodiment, the lower release prevention latching ratchet 20-1 is provided on the ascending side of the screw-shaped stopper, but this is provided for safety, and it is ensured only by the screw-shaped stopper. Since the cylindrical cutter can be locked, the lower release prevention locking ratchet 20-1 is not always necessary.

  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 tooth 7 has a shape that is hardly locked by design, and the cylindrical cutter 4 does not return to its original position once it is opened, but if the ratchet piece 44 and the ratchet tooth 7 are slightly Even if the cylindrical cutter is about to rise due to interference, the latched ratchet is latched with the upper separation prevention latching ratchet 20-2 to prevent further raising. 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 preferred embodiments of the present invention have been described above, but the present invention is not limited to the above embodiments, and various design changes can be made within the scope of the technical idea.
For example, in the above embodiment, the tubular cutter is integrally formed with the spout body to reduce the number of forming steps of the entire spout. However, the present invention is not limited to this, and the spout body and the tubular cutter are separated. It may be molded into an assembly. In that case, according to the present invention, since the screw cutter provided on the spout body prevents the cylindrical cutter from being detached downward, it is not necessary to provide an undercut stopper or the like on the spout body as in the prior art. . In the above embodiment, only the screw-like stopper is provided at a position corresponding to the screw groove by omitting the lower end portion of the screw thread. For example, as shown in the synthetic resin spout 30 with a cylindrical cutter shown in FIG. The thread-like stopper may be formed in contact with or in close proximity to the pressure-side flank 31 of the thread leaving the thread as it is. In FIG. 10, the same parts as those in the above embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

  The synthetic resin spout with a cylindrical cutter of the present invention can be applied to a synthetic resin spout with a cylindrical cutter, regardless of whether the cylindrical cutter and the spout body are integrally formed or separately formed. It is possible to reliably prevent the cylindrical cutter from dropping from the spout body after opening, and the industrial applicability is high.

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 partial front sectional view in the state where a cylindrical cutter and a spout body were assembled. 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. It is front sectional drawing of the spout with a cylindrical cutter which concerns on other embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Synthetic resin spout with a cylindrical cutter 3 Spout main 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 19 Threaded stopper 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 (5)

A spout main body having a flange that can be welded to the container main body, a spout main body extending upward from the inner peripheral edge of the flange, and a cylindrical cutter screw-fitted to the inner peripheral surface of the spout main cylinder. A screw for screwing a cap is formed on the outer peripheral surface of the dispensing cylinder, a female screw having a reverse screw relationship with the screw for screwing the cap is formed on the inner peripheral surface, and the female screw is formed on the outer peripheral surface of the cylindrical cutter. In the spout made of synthetic resin in which a male screw that is screwed with the screw is formed,
The screw groove on the inner peripheral surface of the dispensing cylinder is in contact with or close to the pressure side flank at the lower end of the thread or on the extension of the lower end of the thread. A screw-like stopper made of a ridge extending along the thread at a position corresponding to
And on the outer periphery of the upper part of the cylindrical cutter, a locked ratchet that locks with the screw-shaped stopper is formed,
A synthetic resin spout with a cylindrical cutter, wherein the latched ratchet is locked to the screw-shaped stopper to prevent the cylindrical cutter from being detached downward. A locking ratchet that protrudes inward in the circumferential direction along the pressure-side flank of the thread of the female screw axially above the position where the screw-like stopper is formed is formed in the dispensing tube. 2. The synthetic resin spout according to claim 1, wherein the locking ratchet is adapted to engage with the locked ratchet formed on the outer peripheral surface of the cylindrical cutter.   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. The synthetic resin with a cylindrical cutter according to claim 2, comprising a combination of an upper separation prevention latching ratchet that engages with the latched ratchet during rotation in the closing direction, which is formed above the axial direction. Spout made of.   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. 4. The synthetic resin spout with a cylindrical cutter according to claim 2 or 3, wherein at least one locking ratchet is formed for each thread of the multi-threaded screw.   The cylindrical cutter is integrally formed with a spout body via a bridge that can be broken below the dispensing cylinder, and the spout body and the cylindrical cutter are moved relative to each other in the axial direction by breaking the bridge. The synthetic resin spout according to any one of claims 1 to 4, wherein the cylindrical cutter is assembled by screw fitting to the inner peripheral surface of the dispensing cylinder.

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