WO2013143422A1 - 可伸缩式灌装口装置及采用该装置的内胆袋 - Google Patents

可伸缩式灌装口装置及采用该装置的内胆袋 Download PDF

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Publication number
WO2013143422A1
WO2013143422A1 PCT/CN2013/073094 CN2013073094W WO2013143422A1 WO 2013143422 A1 WO2013143422 A1 WO 2013143422A1 CN 2013073094 W CN2013073094 W CN 2013073094W WO 2013143422 A1 WO2013143422 A1 WO 2013143422A1
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Prior art keywords
filling port
port device
mouth
filling
cylinder
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Application number
PCT/CN2013/073094
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English (en)
French (fr)
Inventor
简园力
廖清新
Original Assignee
上海鸿润科技有限公司
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Application filed by 上海鸿润科技有限公司 filed Critical 上海鸿润科技有限公司
Publication of WO2013143422A1 publication Critical patent/WO2013143422A1/zh

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D47/00—Closures with filling and discharging, or with discharging, devices
    • B65D47/04—Closures with discharging devices other than pumps
    • B65D47/06—Closures with discharging devices other than pumps with pouring spouts or tubes; with discharge nozzles or passages
    • B65D47/061—Closures with discharging devices other than pumps with pouring spouts or tubes; with discharge nozzles or passages with telescopic, retractable or reversible spouts, tubes or nozzles
    • B65D47/063—Closures with discharging devices other than pumps with pouring spouts or tubes; with discharge nozzles or passages with telescopic, retractable or reversible spouts, tubes or nozzles with flexible parts

Definitions

  • the present invention relates to containers, and in particular to a filling port device in a bladder bag. Background technique
  • plastic liner bags are usually used to hold these liquids. Due to the limited strength of the plastic liner bag, the liner bag is often placed in the container to avoid damage during transport.
  • liner bags usually have a filling port device for allowing liquid to enter, the bottom of the filling port device is connected and sealed to the plastic inner bag by fusion welding, and the mouth of the filling port device has a matching with the filling head. Connection structure. Before the liner bag reaches the filling manufacturer from its manufacturer, its shipping package is attached with a filling port and is in a vacuum folded state. Therefore, when folded, the size of the inner bag, especially the height direction, will greatly affect the packaging size of the inner bag, which in turn affects transportation costs.
  • Filling heads come in a wide variety of sizes, the most common being a quick connect type filling head which is typically connected using a cam structure and a filling port device having an arcuate groove that matches the cam structure.
  • Existing filling port devices connected to a filling head employing a cam structure generally consist of a mouth portion, a connecting portion, a straight portion and a bottom portion.
  • the mouth is cylindrical
  • the outer circumference is provided with a thread for connecting the inner cap.
  • the connecting portion is provided with an arc groove corresponding to the filling head, and the straight portion provides a escaping space required for installing the filling head, and the bottom is a flange, and the flange can be welded and fixed to the plastic inner bag.
  • the entire filling port device accumulates the mouth, the connecting portion, the straight portion and the flange connecting the inner bag in height, so that the height direction of the inner bag is too large, since the volume specification of such a container is fixed. , so that its volume has a certain extent reduced, more importantly, this makes the size of the factory package of the inner bag too large, increasing the transportation cost.
  • Another common filling device is a threaded connection type filling device, the matching filling head also having a thread.
  • the filling port device is lower in height than the above-mentioned filling port device, it is required to relatively fix the filling port device when the thread is screwed or loosened. Therefore, it is necessary to design an additional flanged straight portion, which is not conducive to the reduction of the height of the entire inner bag. At the same time, it increases the cost of packaging transportation.
  • the present invention provides a filling port device fixed to a bladder bag, comprising a mouth portion connected to the filling device and a bottom portion connected to the inner bag, wherein the mouth portion A retractable structure is provided between the bottom and the bottom.
  • the mouth portion, the telescopic structure, and the bottom portion are formed as a single piece, and the telescopic structure includes a telescopic bellows structure and a bellows structure and the a cylindrical receiving portion between the bottoms, the cylindrical receiving portion for receiving the deformed bellows structure.
  • the bellows structure has a flat inclined thin wall and a curved thin wall, and when the bellows structure is subjected to a downward force, the curved thin wall is bent downward and deformed.
  • the mouth and the bottom are two separate parts
  • the telescopic structure includes a cylinder and a sealing ring extending integrally from the bottom, and an annular groove is disposed on the outer peripheral wall of the cylinder, and the sealing ring is fixed in the groove.
  • the cylinder and the sealing ring are slidable in an inner wall of the mouth.
  • the seal ring is a rubber ring.
  • the mouth and the bottom are two separate parts
  • the telescoping structure includes a cylinder integrally extending from the bottom, a seal ring, and a spiral connection between the mouth and the bottom.
  • the spiral connection structure includes a pair of symmetrical spiral grooves on the outer peripheral wall of the cylinder and a pin engaged with the spiral groove,
  • a side hole is formed in the mouth portion, and the pin penetrates and fixes through the side hole.
  • the mouth portion is substantially cylindrical, and the outer circumference of the cylinder is provided with a thread that cooperates with the inner cap and a cam for the filling head below the thread.
  • An annular groove having an arcuate cross section.
  • the bottom portion is a flange in the form of a flange, and the flange is fixed to the inner bag connection to fix the filling port device to the inner bag.
  • the thread of the mouth portion can also be used for connection with a filling head in the form of a threaded connection.
  • the present invention also provides a bladder bag using the above-described filling port device.
  • a retractable structure is adopted between the mouth portion and the bottom portion, so that it can be easily used at a height (such as a height at the time of filling or drawing) and a package height (such as a height during transportation).
  • a height such as a height at the time of filling or drawing
  • a package height such as a height during transportation
  • Figure 1 is a partial cutaway front elevational view of a conventional quick connect type filling head
  • Figure 2 is a cross-sectional view of a conventional filling port device mated with the filling head of Figure 1;
  • Figure 3 is a partially cutaway perspective view of an embodiment of the filling port device of the present invention in an extended state
  • Figure 4 is a view of the filling port device attached to the inner bag of the embodiment of Figure 3 in an extended state Partial cutaway front view
  • Figure 5 is a partial cutaway front elevational view of the filling port device connected to the inner bag of the embodiment of Figure 3 when connected to the quick connect type filling head;
  • Figure 6 is a partial cutaway front elevational view of the filling port device connected to the inner bag in the embodiment of Figure 3 in a contracted state;
  • Figure 7 is a partially cutaway front elevational view of another embodiment of the filling port device of the present invention attached to the inner bag in an extended state;
  • Figure 8 is a partially cutaway front elevational view of the filling port device connected to the inner bag in the embodiment of Figure 7 in a collapsed state;
  • Figure 9 is a partially cutaway front elevational view of still another embodiment of the filling port device of the present invention attached to the inner bag in an extended state;
  • Figure 10 is a partially cutaway front elevational view of the filling port device attached to the inner bag of the embodiment of Figure 9 in a collapsed state.
  • Figures 1 and 2 show a prior art quick connect type filling head 3 and an existing filling port device 1000 mated with the filling head 3, respectively.
  • the filling head 3 is a standard member, which is composed of a body 32 and a shank cam 31.
  • the center of rotation of the cam 31 is a distance H0 from the bottom surface of the filling head, and HO is generally about 21 mm.
  • the filling port device 1000 includes a mouth portion 100, a straight portion 200, and a bottom portion 300 in order from top to bottom.
  • the outer periphery of the mouth portion 100 is provided with a thread 101 for connecting with the inner cap and an arc portion 102 provided with a groove for engaging with the cam of the filling head 3.
  • the straight portion 200 provides the escape space required to mount the filling head 3, and the length of the straight portion 200 is set according to H0.
  • the bottom 300 is a flange that can be welded and secured to the plastic liner bag.
  • the size of the filling port device in the height direction is increased, so that the height direction of the inner bag to which the filling port device is attached is also increased. This increases the cost of packaging and shipping the inner bag.
  • Figures 3-6 illustrate a first embodiment of a retractable filling device 1 of the present invention.
  • the filling port device 1 is an integral body including a mouth portion 14 connected to the filling device, a bottom portion 13 connected to the inner bag, and a telescopic structure between the mouth portion 14 and the bottom portion 13. Pieces.
  • the mouth portion 14 is generally cylindrical, with a thread 11 fitted to the inner cap and a cam for the filling head 3 of Figure 1 below the thread 1 1 .
  • a mating annular groove 12 having an arcuate cross section.
  • the bottom portion 13 is a flange in the form of a flange, and the bottom portion 13 is joined to the plastic inner bag 2 by fusion welding to fix the filling port device 1 to the inner bag 2.
  • the mouth portion 14 and the bottom portion 13 are connected by a telescopic structure.
  • the telescopic structure includes a telescopic bellows structure 19 and a cylindrical receiving portion 18 disposed between the bellows structure 19 and the bottom portion 13.
  • the sum of the height of the receiving portion 18 and the height of the corrugated tube structure is equal to the height of the straight portion 300 of the filling port device 100 of the prior art (in Fig. 2).
  • the bellows structure 19 has a flat inclined thin wall 16 and a curved thin wall 17, but the bellows structure 19 can also adopt other existing bellows which can realize expansion and contraction.
  • the thin wall (16, 17) at the bellows structure 19 of the filling port device 1 maintains the entire filling port device 1 in an extended state due to its own plastic strength.
  • Annular groove 12 with quick connection The shank cam 31 of the filling head 3 is connected to each other. At this time, the annular groove 12 to the bottom portion 13 have a sufficient distance to match the installation of the filling head 3.
  • Fig. 6 shows the filling port device 1 in a contracted state attached to the inner bag. Since the bellows structure 19 of the filling port device 1 is thin, its strength is much smaller than that of other parts. Therefore, when not connected to the filling head, such as during transportation, when the mouth portion 14 is pressed downward with a certain force, the bellows structure 19 will first be deformed. At this time, since the thin wall 16 of the bellows structure 19 has a slightly higher strength than the curved thin wall 17, the thin wall 17 will be bent downward and deformed when the amount of deformation reaches a certain critical amount. For example, if the height drops by H, the thin wall 17 will achieve a stable position that can be maintained.
  • the overall height of the filling port device 1 will drop by H, so that the overall height of the inner bag in which the cap filling port device 1 is mounted is also lowered by H, that is, the height of the container accommodating the inner bag is also lowered accordingly. Thereby, the manufacturing of the container accommodating the inner bag is reduced, and the transportation cost is also lowered.
  • Figures 7 and 8 show a second embodiment of the retractable filling port device 1 of the present invention.
  • the filling port device 1 also includes a mouth portion 14 connected to the filling device, a bottom portion 13 connected to the inner bag, and a telescopic structure 29 between the mouth portion 14 and the bottom portion 13.
  • the mouth portion 14 and the bottom portion 13 are two separate members, and the telescopic structure includes a cylinder 120 extending from the bottom portion 13 , a sealing ring 121 , a cylinder 120 and a sealing ring 121 . It can slide in the inner wall of the mouth portion 14 to achieve a telescopic function.
  • An annular groove 125 is provided in the outer peripheral wall of the cylinder 120, and the seal ring 121 is mounted in the annular groove 125.
  • the sealing ring 121 is a rubber ring.
  • the rubber ring 121 can be firmly fixed on the groove 125 of the cylinder 120 by means of double injection molding, glue bonding, etc., and the rubber ring 121 after the fixing protrudes from the cylinder.
  • the inner wall of the mouth portion 14 has a flange 122 projecting radially inwardly along the entire circumference near the lower edge, and the flange 122 cooperates with the protruding rubber ring 121 for restricting the mouth portion 14 so that the mouth portion does not easily come out after installation. .
  • the rubber ring 121 also serves as a seal between the mouth portion 14 and the cylinder 120 to prevent liquid leakage.
  • An interference fit is applied between the rubber ring 121 and the inner wall of the mouth portion 14 such that there is a large relative friction between the mouth portion 14 and the rubber ring 121, so that the mouth portion 14 can be maintained in a state of being extended or contracted.
  • pressure may be applied downwardly such that the mouth portion 14 moves downwardly along the cylinder 120, thereby reducing the overall height of the filling port device 1, as shown in FIG. .
  • Figures 9 and 10 show a third embodiment of the filling port device of the present invention.
  • the difference from the second embodiment is that a spiral connection structure 124 is added between the mouth portion 14 and the bottom portion 13 of the filling port device 1, which
  • the portion of the structure is substantially the same as that of the second embodiment, that is, it also includes a separate mouth portion 14 and a bottom portion 13, a cylinder 120 extending from the bottom portion 13 and a sealing ring 121, the structure of each component and the mutual connection relationship with each other.
  • the second embodiment is basically the same and will not be described in detail herein.
  • a pair of symmetrical helical grooves 124 are also provided in the wall of the cylinder 120, in cooperation with pins 123.
  • the pin 123 is inserted and tightly fitted by a side hole 141 provided at a corresponding position on the mouth portion 14.
  • the mouth is first inserted into the cylinder 120, and the side holes 141 are aligned with the spiral grooves 124, and then the pins 123 are inserted and the pins 123 are fixed in the side holes 141 by the interference fit.
  • the mouth portion 14 can be moved up and down on the wall of the cylinder 120 by rotation relative to the bottom portion 13, thereby realizing the height expansion and contraction of the filling port device 1, as shown in Fig. 10, after the contracted filling port device 1.
  • the cooperation of the pin 123 and the groove 124 makes the structure of the filling port device stronger when subjected to the pressure or tension in the height direction. Therefore, this embodiment is more suitable for such an application environment in which the height direction is subjected to a large force.
  • the spiral structure between the mouth portion and the bottom portion can also be replaced with a thread structure, and the expansion and contraction of the filling port can also be achieved.
  • a retractable structure is adopted between the mouth portion and the bottom portion, so that it can be easily used at a height (such as a height at the time of filling or drawing) and a package height (such as a height during transportation).
  • the conversion is carried out to effectively reduce the total height of the inner bag in which the filling port device is installed and the height of the container in which the inner bag is accommodated, without affecting the use, thereby reducing the production cost and transportation cost of the container.
  • the height of the filling port device can be reduced by about 25%.
  • Gp for the standard of the filling head with the rotation center of the cam at a distance of about 21 mm from the bottom surface of the filling head, the total height of the filling port device is 52 mm, and the retractable height is 12 mm, that is, the height at the time of packaging is 40 mm.
  • the original packaging capacity of only five liner bags can now be placed, and now six (layer) liner bags can be placed, thereby reducing packaging costs and shipping costs.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bag Frames (AREA)
  • Basic Packing Technique (AREA)

Abstract

一种可伸缩式灌装口装置及采用该装置的内胆袋，可伸缩式灌装口装置（1）包括与灌装设备连接的口部（14）以及与所述内胆袋连接的底部（13），其中，口部和底部之间设有可伸缩的结构。本发明的灌装口装置中，口部（14）与底部（13）之间采用了可伸缩式结构，使其能够简便的在诸如进行灌装或抽取时的使用高度和诸如运输途中的包装高度间进行转换。

Description

可伸缩式灌装口装置及采用该装置的内胆袋 技术领域
本发明涉及容器， 具体涉及内胆袋中的灌装口装置。 背景技术
在食品、 医药、 化学等类物品运输过程中， 某些液体因为具有腐蚀性或者 有防污染要求， 故而通常使用塑料内胆袋来盛放这些液体。 由于塑料内胆袋自 身强度有限， 内胆袋往往被放置在容器中， 以避免在运输途中损坏。
这些内胆袋通常具有一个可以让液体进入的灌装口装置， 该灌装口装置的 底部通过熔焊与塑料内胆袋连接并密封， 灌注口装置的口部则具有和灌装头相 匹配的连接结构。 内胆袋在从其生产厂商到达灌装厂商之前， 其运输包装是附 带有灌装口并处于真空折叠状态。 因此， 折叠状态时， 内胆袋的尺寸， 特别是 高度方向的尺寸将大大影响内胆袋的包装尺寸， 进而影响运输成本。
灌装头的规格种类众多， 最常用的是一种快速连接类型灌装头， 该类型灌 装头通常使用一个凸轮结构和具有一个与凸轮结构匹配的弧形槽的灌装口装置 连接。
现有的与采用凸轮结构的灌装头连接的灌装口装置通常由口部、 连接部、 直部和底部构成。 其中， 口部为圆筒状， 其外周设有用于连接内胆盖的螺纹。 连接部设有与灌装头配合的弧形槽， 直部提供安装灌装头时所需的避让空间， 底部为一个法兰， 法兰可熔焊并固定到塑料内胆袋上。
因此， 整个灌装口装置在高度上累加了口部、 连接部、 直部以及连接内胆 袋的法兰， 使得内胆袋的高度方向尺寸过大， 由于此类容器的体积规格是固定 的， 使得其容积有一定幅度减少， 更重要的是， 这使得内胆袋的出厂包装尺寸 过大， 增加了运输成本。
另一种常见的灌装口装置是螺纹连接类型的灌装口装置， 与之配合的灌装 头也具有螺纹。 这类灌装口装置虽然高度上较上述灌装口装置有所降低， 但其 在螺纹旋紧或者松脱的时候需要将灌注口装置进行相对的固定。 因此， 在结构 上需要设计有一个额外的带凸缘的直部， 这也不利于整个内胆袋高度的降低， 同时增加了包装运输成本。
因此， 就需要设计一种具有可降低灌装口装置的总高度的结构的灌装口装 置， 从而减少内胆袋及其灌装口装置的包装高度， 以最大幅度的节省包装和运 输成本。 发明内容
本发明的目的是提供一种可伸缩的灌装口装置， 以减小运输时灌装口装置 以及内胆袋的总高度。
为实现上述目的， 本发明提供了一种固定到内胆袋的灌装口装置， 包括与 灌装设备连接的口部以及与所述内胆袋连接的底部， 其特征在于， 所述口部和 所述底部之间设有可伸缩的结构。
一优选实施例中， 所述口部、 所述可伸缩的结构、 所述底部形成为一体件， 所述可伸缩的结构包括可伸缩的波纹管结构和设置在所述波纹管结构与所 述底部之间的筒状接纳部， 所述筒状接纳部用于接纳形变后的所述波纹管结构。
上述实施例中， 优选地， 所述波纹管结构具有平板斜薄壁和弧形薄壁， 当 所述波纹管结构受到向下力时， 所述弧形薄壁向下弯曲变形。
另一优选实施例中， 所述口部与所述底部为分开的两个部件，
所述可伸缩结构包括从所述底部一体延伸出的圆筒、 密封圈， 所述圆筒上 外周壁上设有环形凹槽， 所述密封圈固定在所述凹槽中，
所述圆筒和所述密封圈能够在所述口部的内壁中滑动。
上述优选实施例中， 优选地， 所述密封圈是橡胶圈。
另一优选实施例中， 所述口部与所述底部为分开的两个部件，
所述可伸缩结构包括从所述底部一体延伸出的圆筒、 密封圈、 以及在所述 口部和底部之间的螺旋连接结构。
上述实施例中， 优选地， 所述螺旋连接结构包括在所述圆筒的外周壁上的 一对对称的螺旋凹槽以及与所述螺旋凹槽配合的销，
所述口部的上设有侧孔， 所述销通过所述侧孔穿入并固定。
本发明的灌装口装置中， 优选地， 所述口部为大致圆筒状， 圆筒外周设有 与内胆盖配合的螺纹和在所述螺纹下方的用于与灌装头的凸轮配合的具有弧形 截面的环形凹槽。 本发明的灌装口装置中， 优选地， 所述底部为法兰形式的凸缘， 所述凸缘 固定到所述内胆袋连接以将灌装口装置固定到所述内胆袋上。
本发明的灌装口装置中， 优选地， 所述口部的螺纹还能够用于与螺纹连接 形式的灌装头连接。
本发明还提供了一种内胆袋， 采用了上述的灌装口装置。
本发明的灌装口装置中， 口部与底部之间采用了可伸缩式结构， 使其能够 简便的在使用高度 （诸如进行灌装或抽取时的高度） 和包装高度 （诸如运输途 中的高度） 间进行转换， 从而在不影响使用的同时， 有效降低了安装有灌装口 装置的内胆袋的包装总高度， 进而降低包装和运输成本。 附图说明
图 1是现有的快速连接型灌装头的局部剖切正视图；
图 2是一种现有的与图 1的灌装头配合的灌装口装置的剖视图；
图 3本发明的灌装口装置的一个实施例在伸出状态时的局部剖切立体图； 图 4是图 3 的实施例中的连接到内胆袋的灌装口装置在伸出状态时的局部 剖切正视图；
图 5是图 3 的实施例中的连接到内胆袋的灌装口装置与快速连接类型灌装 头连接时的局部剖切正视图；
图 6是图 3 的实施例中的连接到内胆袋的灌装口装置在收缩状态时的局部 剖切正视图；
图 7 是本发明的连接到内胆袋的灌装口装置的另一实施例在伸出状态时的 局部剖切正视图；
图 8是图 7的实施例中的连接到内胆袋的灌装口装置在收缩状态时的的局 部剖切正视图；
图 9 是本发明的连接到内胆袋的灌装口装置的又一实施例在伸出状态时的 局部剖切正视图；
图 10是图 9的实施例中的连接到内胆袋的灌装口装置在收缩状态时的的局 部剖切正视图。 具体实施方式 以下将结合附图对本发明的较佳实施例进行详细说明， 以便更清楚理解本 发明的目的、 特点和优点。 应理解的是， 附图所示的实施例并不是对本发明范 围的限制， 而只是为了说明本发明技术方案的实质精神。 图中相同或相似的部 分采用相同的附图标记表示。
图 1和图 2分别示出现有的快速连接类型灌装头 3和与灌装头 3配合的现 有的灌装口装置 1000。 如图 1所示， 灌装头 3为标准件， 其由本体 32和带柄凸 轮 31构成， 凸轮 31的旋转中心距离灌装头底平面距离为 H0， HO一般为 21mm 左右。 如图 2所示， 灌装口装置 1000从上到下依次包括口部 100、 直部 200以 及底部 300。 口部 100外周设有用于与内胆盖连接的螺纹 101和弧形部 102， 弧 形部设有用于与灌装头 3 的凸轮配合的凹槽。 直部 200提供了安装灌装头 3所 需要的避让空间， 直部 200的长度根据 H0设定。 底部 300是一法兰， 法兰可熔 焊并固定到塑料内胆袋上。 现有的灌装口装置 100中， 由于设置了直部 200， 因 此， 灌装口装置高度方向的尺寸增加， 使得安装有该灌装口装置的内胆袋高度 方向尺寸也增加。 由此增加了内胆袋包装和运输成本。
图 3-6示出了本发明可伸缩灌装口装置 1的第一实施例。 如图 3-6所示， 灌 装口装置 1是包括与灌装设备连接的口部 14、 和内胆袋连接的底部 13、 以及在 口部 14和底部 13之间的可伸缩结构的一体件。
如图 3和 4所示， 口部 14为大致圆筒状， 其外周设有与内胆盖配合的螺纹 1 1、 以及在螺纹 1 1下方的用于与图 1的灌装头 3的凸轮配合的具有弧形截面的 环形凹槽 12。 底部 13为法兰形式的凸缘， 底部 13通过熔焊与塑料内胆袋 2连 接以将灌装口装置 1固定到内胆袋 2上。
口部 14和底部 13之间采用可伸缩结构连接， 本实施例中， 可伸缩结构包 括可伸缩的波纹管结构 19和设置在波纹管结构 19与底部 13之间的圆筒状接纳 部 18， 以接纳形变后的波纹管结构 19。 在自由状态时， 接纳部 18的高度与波 纹管结构高度之和等于现有技术中 （图 2中） 的灌装口装置 100的直部 300的 高度。
如图 4所示， 本实施例中， 波纹管结构 19具有一个平板斜薄壁 16和弧形 薄壁 17， 但波纹管结构 19也可采用其他现有的可实现伸缩的波纹管。在自由状 态时， 如图 5所示， 灌装口装置 1的波纹管结构 19处的薄壁 （16， 17 ) 由于其 自身的塑料强度会使整个灌装口装置 1保持在伸出状态。 环形凹槽 12配合快接 式灌装头 3 的带柄凸轮 31， 使其二者相互连接。 此时， 环形凹槽 12到底部 13 具有足够的距离来配合灌装头 3的安装。
图 6示出附连到内胆袋的呈收缩状态的灌装口装置 1。由于灌装口装置 1的 波纹管结构 19是薄壁， 其强度远小于其他部位的。 因此， 在不与灌装头连接时， 诸如在运输途中， 当使用一定的力向下按压口部 14时， 波纹管结构 19处将首 先发生形变。 此时， 由于波纹管结构 19的薄壁 16、 17中， 平板斜薄壁 16强度 略高于弧形薄壁 17， 薄壁 17将向下弯曲变形， 当变形量达到某个临界量时， 例 如高度下降 H， 薄壁 17将获得一个可保持的稳定位置。 这样， 灌装口装置 1的 总体高度将下降 H， 使得安装了盖灌装口装置 1 的内胆袋的总体高度也下降了 H， 即容纳内胆袋的容器高度也相应地下降了 H。 从而， 容纳内胆袋的容器的制 造成本降低， 并且运输成本也降低。
图 7和图 8示出了本发明的可伸缩式灌装口装置 1 的第二实施例。 本实施 例中，灌装口装置 1也包括与灌装设备连接的口部 14、和内胆袋连接的底部 13、 以及在口部 14和底部 13之间的可伸缩结构 29。 与第一实施例不同之处在于， 口部 14与底部 13为分开的两个部件， 可伸缩结构包括从底部 13—体延伸出的 圆筒 120、 密封圈 121， 圆筒 120和密封圈 121可在口部 14的内壁中滑动， 从 而实现伸缩功能。
在圆筒 120 的外周壁上设有环形凹槽 125， 密封圈 121 安装在该环形凹槽 125中。 本实施例中， 密封圈 121是橡胶圈， 该橡胶圈 121可采用二次注塑、 胶 水粘合等方法牢固的固定在圆筒 120的凹槽 125上， 固定之后的橡胶圈 121突 出圆筒的圆周表面。 口部 14的内壁靠近下边缘处有沿整个圆周径向向内突出的 凸缘 122， 凸缘 122配合突出的橡胶圈 121， 用以限制口部 14， 使得口部在安装 后不会轻易脱出。 同时， 橡胶圈 121还用作口部 14与圆筒 120之间的密封圈， 从而防止液体泄漏。 橡胶圈 121和口部 14的内壁之间采用过盈配合， 使得口部 14与橡胶圈 121之间存在一个较大的相对摩擦力，从而使口部 14能够保持在伸 出或者收缩的状态。
在运输途中， 或不与灌装头连接时， 可向下施加压力， 使得口部 14沿着圆 筒 120向下运动， 由此减小灌装口装置 1的总体高度， 如图 8所示。
图 9和图 10示出本发明的灌装口装置的第三实施例。 与第二实施例不同之 处在于， 在灌装口装置 1的口部 14和底部 13之间增加了螺旋连接结构 124， 其 他部分基本与第二实施例结构相同， 即也包括分开的口部 14和底部 13、 从底部 13—体延伸出的圆筒 120、 以及密封圈 121， 各部件的结构以及相互的连接关系 与第二实施例基本相同， 在此不再详述。
该实施例中， 在圆筒 120壁上还具有一对对称的螺旋凹槽 124， 与之配合的 是销 123。 销 123通过在口部 14上的相应位置上设置的侧孔 141穿入并紧配固 定。 安装时， 首先将口部套入圆筒 120中， 并使得侧孔 141 与螺旋凹槽 124对 准， 然后插入销 123并通过过盈配合将销 123固定在侧孔 141中。
此时， 口部 14通过相对于底部 13的旋转可实现在圆筒 120壁上上下运动， 从而实现灌装口装置 1高度的伸缩， 如图 10所示的收缩后的灌装口装置 1。 同 时， 销 123与凹槽 124的配合使得灌装口装置在承受高度方向的压力或拉力时， 结构强度更加牢固。 因此， 该实施例更适用于此类高度方向承受较大力的应用 环境。
上述第三实施例中， 口部与底部之间的螺旋结构也可以替换为螺纹结构， 同样可以实现灌装口的伸缩。
本发明的灌装口装置中， 口部与底部之间采用了可伸缩式结构， 使其能够 简便的在使用高度 （诸如进行灌装或抽取时的高度） 和包装高度 （诸如运输途 中的高度） 间进行转换， 从而在不影响使用的同时， 有效降低了安装有灌装口 装置的内胆袋的总高度和容纳该内胆袋的容器的高度， 进而降低容器的生产成 本和运输成本。
例如， 对于与采用凸轮结构的灌装头连接的灌装口装置， 灌装口装置的高 度可降低 25%左右。 gp，对于凸轮的旋转中心距离灌装头底平面距离约为 21mm 的灌装头标准件， 灌装口装置总高度为 52mm， 可伸缩高度为 12mm， 即包装时 高度为 40mm。那么， 如果采用该灌装口装置的复合型或中型散装容器塑料内胆 袋在包装时折叠厚度为 10mm， 则总包装体积可下降的百分比为 12/ ( 52+10 ) X 100%= 19%, 即 19%的空间节约。 换句话说， 原来只能装五个内胆袋的包装高 度， 现在可以放置六个 （层） 内胆袋， 由此减少包装的成本和运输成本。
需要指出的是， 虽然上述实施例以与采用凸轮结构的灌装头连接的灌装口 装置为例进行说明， 但应理解， 根据本发明的原理的可伸缩结构也应用于诸如 螺纹连接类型灌装口装置等需要减小高度方向尺寸的并具有一定直壁的灌装口 装置中。 以上已详细描述了本发明的较佳实施例， 但应理解到， 在阅读了本发明的 上述讲授内容之后， 本领域技术人员可以对本发明作各种改动或修改。 这些等 价形式同样落于本申请所附权利要求书所限定的范围。

Claims

权 利 要 求
1. 一种固定到内胆袋的灌装口装置， 包括与灌装设备连接的口部以及与所 述内胆袋连接的底部， 其特征在于， 所述口部和所述底部之间设有可伸缩的结 构。
2. 如权利要求 1所述的灌装口装置， 其特征在于，
所述口部、 所述可伸缩的结构、 所述底部形成为一体件，
所述可伸缩的结构包括可伸缩的波纹管结构和设置在所述波纹管结构与所 述底部之间的筒状接纳部， 所述筒状接纳部用于接纳形变后的所述波纹管结构。
3. 如权利要求 2所述的灌装口装置， 其特征在于， 所述波纹管结构具有平 板斜薄壁和弧形薄壁， 当所述波纹管结构受到向下力时， 所述弧形薄壁向下弯 曲变形。
4. 如权利要求 1所述的灌装口装置， 其特征在于，
所述口部与所述底部为分开的两个部件，
所述可伸缩结构包括从所述底部一体延伸出的圆筒、 密封圈， 所述圆筒上 外周壁上设有环形凹槽， 所述密封圈固定在所述凹槽中，
所述圆筒和所述密封圈能够在所述口部的内壁中滑动。
5. 如权利要求 4所述的灌装口装置， 其特征在于， 所述密封圈是橡胶圈。
6. 如权利要求 1所述的灌装口装置， 其特征在于，
所述口部与所述底部为分开的两个部件，
所述可伸缩结构包括从所述底部一体延伸出的圆筒、 密封圈、 以及在所述 口部和底部之间的螺旋连接结构。
7. 如权利要求 6所述的灌装口装置， 其特征在于，
所述螺旋连接结构包括在所述圆筒的外周壁上的一对对称的螺旋凹槽以及 与所述螺旋凹槽配合的销，
所述口部的上设有侧孔， 所述销通过所述侧孔穿入并固定。
8. 如权利要求 1-7中任一项所述的灌装口装置， 其特征在于， 所述口部为 大致圆筒状， 圆筒外周设有与内胆盖配合的螺纹和在所述螺纹下方的用于与灌 装头的凸轮配合的具有弧形截面的环形凹槽。
9. 如权利要求 1-7中任一项所述的灌装口装置， 其特征在于， 所述底部为 法兰形式的凸缘， 所述凸缘固定到所述内胆袋连接以将灌装口装置固定到所述 内胆袋上。
10. 如权利要求 1-7中任一项所述的灌装口装置， 其特征在于， 所述口部的 螺纹还能够用于与螺纹连接形式的灌装头连接。
11. 一种内胆袋， 其特征在于， 采用了权利要求 1-7中任一项所述的灌装口 装置。
PCT/CN2013/073094 2012-03-29 2013-03-22 可伸缩式灌装口装置及采用该装置的内胆袋 WO2013143422A1 (zh)

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