JP2006124012A - Cap structure of liquid container - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enable screw engagement always following the directionality of a cap even when the same has frontward and backward directionality as to a pot on whose pot opening the cap is engaged by a two-line screw structure. <P>SOLUTION: This relates to the cap structure of a liquid container. A two-line male screw 13 on a cap 6 is formed by combining two cross sectionally different male screws A<SB>1</SB>and A<SB>2</SB>. A two-line female screw 5 on a pot opening side 2 is formed by combining two female screws B<SB>1</SB>, B<SB>2</SB>having the cross section and combination corresponding to the screw 13. Only when the cap 6 is in a fixed direction, its corresponding relation can be in an aligned condition for screw engagement. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a stopper structure in a liquid container such as a pot, and more particularly to its screw fitting.

  The stopper of the liquid container is detachably fitted to the container mouth by screw fitting. The user rotates the stopper to open it, tilts the container body, pours liquid such as hot water from the spout, and pours. After taking out, it is rotated in the opposite direction and closed.

  The above screw fitting structure is usually constituted by a single thread, but the lead is large in order to obtain a sufficient opening height (lift) even if the amount of rotation of the stopper is reduced. If it is constituted by a single screw, the plug tends to tilt and drop off at the initial stage of screw fitting of the plug. On the other hand, if a multi-thread screw is used, there is an advantage that a large lift can be obtained and the posture of the stopper at the beginning of screw fitting can be stabilized.

2. Description of the Related Art Conventionally, there has been known a heat insulating container that takes into account the stability of the posture of a stopper at the beginning of screw fitting using a multi-threaded screw (see Patent Document 1). In this case, a multi-thread male screw is formed on the stopper and a single female screw is formed on the container mouth, and a plurality of male screws are fitted into the thread groove of the single female thread. The According to this screw structure, since the screw fitting is started at any one of the plurality of screw ports of the multi-threaded male screw at the beginning of the screw fitting, there is an effect that the posture of the stopper is stabilized. In this case, if the lead of the female thread is set large, the lift of the plug can be increased.
Japanese Patent Laid-Open No. 9-173221 (paragraphs 0015, 0018 FIGS. 2 and 4)

  When opening a plug in a closed state by rotating it in a certain direction, if there is no need to pay particular attention to the direction of the plug at the time of opening, there is no problem in adopting a multi-threaded screw structure, and a large lift can be obtained. And the advantage that the stopper is stabilized at the initial stage of screw fitting is obtained. However, in the multi-threaded screw structure, as described above, there are as many screw holes as the number of screws, and screw fitting is started at any of these screw holes. There is an inconvenience.

  That is, the plug provided with the water flow groove needs to be directed in the direction (forward) corresponding to the spout provided in the front part of the container when the plug is opened. Therefore, for example, when closing the plug, it is necessary to fasten it backward so that the water flow groove faces backward, and when opening the plug, it is necessary to rotate it halfway so as to face forward.

  When a multi-threaded screw structure is adopted for such a directional plug, the direction of the plug is not fixed because the plug starts screw fitting from a plurality of screw openings.For example, the plug may be tightened forward in a closed state. There is a problem that when the stopper is turned halfway to open the plug from the state, the stopper turns backward and water injection cannot be performed or, if possible, incomplete water injection.

  Therefore, an object of the present invention is to provide a liquid container stopper structure that can be adapted to a directional stopper while allowing a large lift to be obtained using a multi-threaded screw structure.

  In order to solve the above problems, the present invention is configured such that a stopper is detachably fitted to the mouth portion of the container body by a screw structure, and the direction of the stopper when closing or opening is constant. In the specified liquid container stopper structure, the screw structure is composed of a multi-thread male screw on the outer peripheral surface of the stopper and a multi-thread female screw on the inner peripheral surface of the mouth corresponding to the screw structure, , Formed by a combination of a plurality of male screws different in cross-sectional shape in terms of screw elements such as screw height, and the multi-thread female screw has a plurality of cross-section shapes and combinations corresponding to the multi-thread male screw It is formed by a combination of female screws, and only when the plug is in a certain direction, the corresponding relationship is in an aligned state so that screw fitting is possible.

  According to the above configuration, the multi-thread male screw on the outer peripheral surface of the stopper and the multi-thread female thread on the container mouth are aligned only in a specific direction, and screw fitting is started. Therefore, the direction of the plug can be determined based on the fitting start position. For example, by setting the direction of the plug to be rearward at the fitting start position, the plug can be rotated once from that state to be in the plugged state. The water will be positive and normal water injection will be performed.

  As described above, according to the present invention, since the stopper is fitted to the container mouth portion by the multi-threaded screw structure, there is an advantage that the lift of the stopper is large, and the directional stopper is always in a predetermined direction. Since it can be made to fit, water can be injected without any trouble at the time of opening.

  The best mode for carrying out the present invention will be described below with reference to the accompanying drawings. As shown in FIG.1 and FIG.2, the pot 1 of Embodiment 1 is provided with the spout 3 connected to the inside of the pot through the mouth part 2, and the handle 4 at the rear part. The mouth portion 2 is formed in a cylindrical shape depending on the inside of the pot 1, and a double female screw 5 made of a square screw is provided on the inner peripheral surface thereof.

  As shown in FIGS. 2 and 3, the plug 6 to be screwed into the mouth portion 2 is provided with a cylindrical plug portion 8 whose lower end is closed at the center of the lower surface of the lid portion 7. A protruding piece 9 protruding backward is provided on the outer peripheral edge of the lid portion 7, and the protruding piece 9 indicates the direction of the plug 6. That is, the state in which the protruding piece 9 faces the direction of the handle 4 is backward, and conversely, the state in which the protruding piece 9 faces the direction of the spout 3 is forward. A decorative edge 11 is provided on the outer peripheral edge of the upper surface of the lid portion 7, and a partial notch 12 is provided on the opposite side of the decorative edge 11 to the protruding piece 9. This notch 12 also displays the orientation of the stopper 6.

  On the outer peripheral surface of the plug portion 8 of the plug 6, a double male screw 13 is provided that is a square screw corresponding to the double female screw 5 of the mouth portion 2. A packing 14 is attached to the upper end of the plug portion 8 in contact with the lower surface of the lid portion 7 (see FIG. 3). In addition, a vertical water flow groove 15 is formed across the double male screw 13 from the lower end of the plug portion 8 to the lower portion of the packing 14. When the stopper 6 is facing forward, the water flow groove 15 is facing forward, and its upper end is opened to the spout 3. When the stopper 6 is in a direction other than forward, the water flow groove 15 is separated from the spout 3, so that even if the pot 1 is tilted forward in that state, water can not be poured or, if possible, incomplete water is poured. .

Takeshi Nijo thread 13 of the, as shown in FIG. 4 (a), a male thread A ₁ of width W ₁ at the same height H, consisting of the male screw A ₂ of the width W ₂ (<W _1). The screw openings a ₁ and a ₂ (see FIG. 4A) of these male screws A ₁ and A ₂ are provided at different positions by 180 ° on the outer peripheral surface of the lower end of the plug portion 8. Each male screw A ₁ , A ₂ is formed over a range of slightly less than 360 degrees from their screw holes a ₁ , a ₂ , and the upper end thereof reaches below the packing 14 (see FIG. 3).

On the other hand, the double female screw 5 provided in the mouth portion 2 has a female screw B ₁ having a depth substantially the same as the height H of the double male screw 13 and a width substantially equal to W _1. The female screw B ₂ has a width substantially equal to W ₂ (<W ₁ ). The screw holes b ₁ and b ₂ (see FIG. 4B) of the female screws B ₁ and B ₂ are provided at different positions by 180 degrees in the middle part of the mouth part 2 in the vertical direction. Each female screw B ₁ , B ₂ is formed over a range of slightly less than 360 degrees from their screw holes b ₁ , b ₂ , and the lower end thereof reaches the lower end of the mouth part 2.

As described above, the male thread A ₁ and the female screw B ₁ represents, together with a substantially equal width W _1, the male thread A ₂ and the female screw B ₂ have substantially the same width W _2, and W _{Since 2} <W ₁ , the screw ports a ₁ and b ₁ , and a ₂ and b ₂ have the same cross-sectional shape. Can be made. However, when the screw port a ₁ and the screw port b ₂ , and the screw port a ₂ and the screw port b ₁ are opposed to each other (see the two-dot chain line in FIG. 4C), the screw port is compared with the width W ₂ of the screw port b _2. Since the width W ₁ of the mouth a ₁ is larger (W ₂ <W ₁ ), the sectional shapes do not match. That is, it is in an inconsistent state and cannot be screwed.

Therefore, when the direction of the plug 6 at the start of screw fitting is rearward (direction in which the protruding piece 9 faces the handle 4 side), the screw openings a ₁ and b ₁ and a ₂ and b ₂ are in an aligned state. Set as follows. When the screw fitting of the plug 6 is started in this posture and rotated 360 degrees, the packing 14 is brought into close contact with the inner peripheral edge of the upper end of the mouth portion 2 to be in a closed state (see solid lines in FIGS. 4D and 5). When the stopper 6 is rotated backward by 180 degrees from this state, the stopper 6 faces forward, the packing 14 moves away from the mouth portion 2, and the water passage groove 15 faces the direction of the pouring spout 3 to be in an open state (FIG. 4 ( e) and the alternate long and two short dashes line in FIG. When the post-injection stopper 6 is returned by 180 degrees, the stopper 6 is turned backward and closed (see the solid line in FIG. 4 (f) and FIG. 5).

Next, in Embodiment 2 shown in FIGS. 6 (a) to 6 (d), a double female screw 5 made of a square screw is provided in the mouth portion 2, and a double male screw made of a square screw corresponding to this is provided in the plug 6. 13 is the same as in the first embodiment described above. However, in the second embodiment, the male screws C ₁ and C ₂ constituting the double male screw 13 have the same width W, and the female screws D ₁ and D of the double female screw 5 corresponding to this are provided. ₂ also has the same width W substantially equal to this. In contrast, the height H ₁ of the male thread C ₁ is greater than the height H ₂ of the male thread _{C 2 (H 1> H 2} ).

These male screws C ₁ , C ₂ have screw openings a ₁ , a ₂ provided at different positions on the outer peripheral surface of the lower end of the plug portion 8 by 180 degrees, and the male screws C ₁ , C ₂ have their screw openings a. ₁ , a ₂ is formed over a range of slightly less than 360 degrees, and its upper end reaches below the packing 14. Further, screw cap b _1, b ₂ of the female thread D _1, D ₂ are provided different in 180 ° position at the middle portion in the vertical direction of the mouth portion 2, the female thread D _1, D ₂ and their screws It is formed over a range of slightly less than 360 degrees from the mouths b ₁ and b ₂ , and the lower end thereof reaches the lower end of the mouth part 2. FIG 6 (c) (d) is a screw cap b ₁ of the female thread D _1, illustrates a screw-cap b ₂ of the female thread D _2.

As described above, the height of the male screw C ₁ having the screw port a ₁ and the height of the female screw D ₁ having the screw port b ₁ coincide with _{each other} at H ₁ , and the male screw C ₂ having the screw port a ₂ has the same height. Since the height and the height of the female screw D ₂ having the screw hole b ₂ coincide with each other at H ₂ , as shown in FIG. 6C, these screw holes a ₁ and b ₁ , a ₂ and b ₂ Becomes an aligned state in which the cross-sectional shapes coincide with each other, and screw fitting can be started. When this relationship is reversed and the screw openings a ₁ and b ₂ and a ₂ and b ₁ face each other as shown in FIG. The mating cannot be started.

  Therefore, the direction of the plug 6 is determined to be rearward in the aligned state where the screw can be fitted, and screw fitting is started and rotated 360 degrees to bring the plug into a closed state (see the solid line state in FIGS. 4D and 5). On the contrary, it is rotated 180 degrees from that state to make it open (see the two-dot chain line state in FIG. 4 (e) and FIG. 5). When this state is returned 180 degrees, the plugged state is reached (see the solid lines in FIG. 4 (f) and FIG. 5).

  Each of the above embodiments has described the double thread structure of the square screw, but it can be constituted by a multiple thread using a round screw or other shaped screw.

  Further, as shown in FIG. 7, a multi-threaded screw may be configured by a combination of different cross-sectional shapes such as a square screw 16 and a round screw 17.

The perspective view which shows the pot of Embodiment 1 Exploded perspective view Perspective view of the stopper (A) Sectional view of screw fitting part same as above, (b) Development view of part of (a) figure, (c) Development view of part of figure (a) in exploded state, (d) to (f) plug Explanatory drawing of partial opening and closing state of Sectional view of the stopper part (A) Sectional view of plug portion of embodiment 2, (b) Development view of portion of (a) view, (c) to (d) Explanatory view of screw fitting Sectional drawing of the stopper part of other embodiment

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Pot 2 Mouth part 3 Spout 4 Handle 5 Double female screw 6 Plug 7 Cover part 8 Plug part 9 Projection piece 11 Decoration edge 12 Notch part 13 Double male screw 14 Packing 15 Water flow groove 16 Square screw 17 Round screw

Claims (3)

  In the stopper structure of a liquid container, the screw structure is configured such that a stopper is detachably fitted to the mouth portion of the container body by a screw structure, and the direction of the stopper is closed or opened. Is composed of a multi-thread male screw on the outer peripheral surface of the stopper and a multi-thread female screw on the inner peripheral surface of the mouth corresponding to the multi-thread male screw, and the multi-thread male screw has a cross-sectional shape in terms of screw elements such as a screw width and a screw height. The multi-thread female screw is formed by a combination of a plurality of female screws having a cross-sectional shape and a combination corresponding to the multi-thread male screw, and the stopper is fixed. A liquid container stopper structure characterized in that the corresponding relationship is in an aligned state and can be screw-fitted only when it is in a direction.   The directionality of the stopper is determined so that the water flow groove provided on the outer peripheral surface of the stopper faces the pouring spout of the container body, and the stopper is fitted backward. 2. The structure according to claim 1, wherein the corresponding relationship between the multi-thread male screw and the multi-thread female screw is matched only to the end of the thread and the end of the thread is reached in one rotation from the start of the thread engagement. Liquid container stopper structure.   3. The stopper structure for a liquid container according to claim 2, wherein a seal attached to the stopper is pressed against the inner periphery of the mouth of the container body at the end of the screw fitting.

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