JPH0134868B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention provides a closure device for a flexible container consisting of a tubular or bag-like semi-finished product consisting of an upper part and a lower part for the transportation and storage of flowable articles. The present invention relates to a closure device for a flexible container, having an element in which the opening area of the container is wrapped around the wrapping element and is prevented from unraveling.

[Conventional technology]

Such a closure device for flexible containers is known (Japanese Utility Model Publication No. 57-15156), in which the winding elements consist of sheet metal strips. The container, consisting of an upper part and a lower part, has a forked inlet on each side of the outlet member in the projection as an opening area, at which point the ends of the upper part and the lower part extend outward so as to form a space. It is bent toward the outside and the edges are joined to the outside, and a strip of sheet metal passes through one space. To close the inlet, the protrusion is wrapped several times around a sheet metal as a winding element and is prevented from unraveling by bending the ends of the sheet metal.

However, this known flexible container closing device has the disadvantage that the winding element in the form of a sheet metal is constructed in such a flexible manner that the ends can be easily bent. As a result, during the wrapping of the area of the opening to be closed, the sheet metal is bent and cannot be wrapped correctly. Moreover, this closure device simply bends both ends of the sheet metal and tightens the vicinity of both sides of the opening area, so when the internal pressure of the container is high, for example, when a large number of flexible containers filled with liquid are stacked in a freight car, the container It is impossible to maintain a reliable seal. Furthermore, if both ends of the bent sheet metal are bent back again by a foreign object or the like, there is a possibility that the winding in the opening area may come undone.

[Problem to be solved by the invention]

The object of the invention is to provide a closure device which facilitates the winding of the opening area of a flexible container to be closed and which ensures a tight seal even at high internal pressures of the container.

[Means to solve the problem]

In order to solve this problem, according to the invention, the winding element is a rigid winding rod having an axially extending slit, the opening area of the container whose end is inserted into this slit being at the opening edge of this slit. It can be bent in place and wrapped around a wrapping rod,
A further rod is provided for tightening the aperture area wrapped around the winding rod to the winding rod at a circumferential angle of at least 270 DEG from the opening edge of the slit.

〔Effect of the invention〕

According to the invention, since the winding element is constructed as a winding rod, it is strong and does not deform, and the opening area of the container can be inserted over its entire width into the axially extending slit, and the Since it is simply wrapped around this winding rod over an angular range of .degree. or more and then tightened with another rod, the winding is easily carried out and the entire width of the opening area is reliably sealed. Furthermore, the opening area is bent by 90° at the opening edge of the slit during winding, so that the opening area does not slip on the winding rod. Therefore, winding is performed reliably. The opening edge of the slit is bent 90 degrees at the opening edge, so
It also acts as a clamping lip and seals the container satisfactorily even at high internal pressures. Finally, since the closure device consists of a small number of parts, it is virtually failure-free and can be used repeatedly. A further rod which tightens the opening area wrapped around the winding rod to this winding rod reliably prevents the winding from unraveling.

[Embodiment]

In an embodiment of the invention, the length of the slit wrapper bar is approximately equal to the width of the container filled with articles, and the height of the entire closure device is approximately the height of the container filled with articles. equal. This embodiment has the advantage that a plurality of containers can be transported, for example, by stacking one on top of the other in a grid box or in a folding cardboard box.

According to another characteristic of the invention, the further rod is constituted by a rod-shaped clamping element, which is connected to the winding rod by means of a clamping screw. In this case, the clamping element can be constructed as a strip of U-shaped cross section, which partially or completely supports the slotted winding rod. This embodiment provides that at the two edges of the U-shaped cross-section, the upper and lower parts of the flexible container to be closed are pressed against the slitted winding rod, thus providing an additional seal of the closing device. It has the advantage of being carried out.

The further rod can also consist of two opposing square tubes or irregular cross-section rods connected to each other by a clamping screw passing through the wrapping rod at a point other than the extension of the slot in the wrapping rod. .

In a further embodiment, the further rod is constituted by a sleeve that permanently surrounds the wound opening area and can be fitted onto the wrapping rod, which sleeve, in the fitted state, It is held so that it does not rotate relative to the attachment rod.

By configuring another rod as a sleeve,
A fast and reliable fixing of the opening area wrapped around the winding rod takes place. In this case, additional elements such as tightening screws, which can be lost when opening the closing device and during cleaning of the container, are not required. The sleeve can be fitted onto the winding rod in the axial direction of the winding rod. Since the fitted sleeve is held non-rotatably, the wound open area cannot be unraveled, so that the container is always well closed. Handling of the closure device is even easier and failures are less likely to occur.

In a preferred embodiment, the sleeve and the winding rod are held in such a way that they cannot rotate relative to each other because the contoured cross-section of the sleeve and the winding rod differs from a circular shape. In this case, the profiled cross-section of the sleeve and the winding rod can be square, in particular square or rectangular. This special modified cross-sectional shape makes it possible to dispense with additional detent pieces.

In another embodiment, the sleeve is held against relative rotation on the winding rod by a detent piece that engages both parts. A notch can be provided in the end of the sleeve for this purpose,
After the sleeve has been fitted, a radially extending pin provided at the corresponding end of the winding rod fits into the notch as a detent. This also allows the use of winding rods and sleeves of circular cross section. In a preferred embodiment, longitudinal slits are used at the same time as incisions, preferably at both ends of the sleeve, at both ends of the winding rod and used for accommodating pins. In addition to eliminating additional cuts in the sleeve, the longitudinal slots together with the pins serve as guides for fitting the sleeve onto the winding rod. This prevents the sleeve from rotating relative to the winding rod during fitting.

According to another characteristic of the invention, the sleeve is made of an elastic material and is frictionally connected to the outer surface of the wound opening area. Preferably, the height of the longitudinal slit is slightly smaller than the height of the flattened opening area, so that the longitudinal edges of the longitudinal slit of the sleeve contact the upper and lower parts of the container. This prevents the fitted sleeve from sliding against the winding rod.

According to another characteristic of the invention, the opening in the end face of the sleeve opposite the inlet opening is closed off by a plate. This plate serves as a stop and thereby ensures a simple positioning of the sleeve in the axial direction when fitting it onto the winding rod.

In a further embodiment of the closure device according to the invention, two sleeves are provided which can be fitted onto both ends of the winding rod, the length of each of these sleeves being less than half the overall length of the winding rod. This simplifies the fixing of the opening area wrapped around the winding rod. This is because it is not necessary to fit a sleeve equal to the entire length of the winding rod, but rather two small sleeves can be used which are fitted on each end of the winding rod. This is advantageous, especially in wide opening areas, where large frictional resistances occur due to the length of the sleeve.

In a further embodiment, the sleeve has a U-shaped cross-section and can be fitted at right angles to the axial direction of the winding rod, and is provided with retaining pieces at both ends of the sleeve. A latch, which is pivoted on the sleeve and engages the winding rod, can be provided as a stopper.

A ring which can be fitted onto the end of the sleeve is also considered as a locking piece. U-shaped sleeves are used if wide opening areas have to be closed, which can lead to high frictional resistances during axial displacement of the sleeve.

Finally, according to the invention, the edge of the opening region extending into the slot of the winding rod is provided inside the winding rod. Obstructive protuberances in the area of the wrapped opening are thereby avoided. These ridges make it difficult to fit the sleeve.

〔Example〕

Embodiments of the closure device according to the invention are explained below with reference to the drawings.

Bag-like flexible container 1 shown in FIGS. 1 and 2
consists of an upper part 2 and a lower part 3, which parts are joined to a common edge 5 along both longitudinal and bottom sides, for example glued or welded to each other. The upper part 2 is equipped with an inlet 4. An opening area 7 of the container 1 opens into the neck 6 . Opening range 7
is closed by a closing device 8.

The opening area 7 is formed by the winding rod 1 when the container 1 is closed.
0 through an axially extending slit 9 in the center, and then in the embodiment shown in FIG.
By rotating the wrapping rod 10 in the direction of the center of the container, it is taut and at least wrinkle-free.
270°, in this case 360°. By winding several times, the layers in the opening area 7 can be stacked.
In this case, the opening area 7 is approximately at the left and right opening edges of the slit 9, as can be seen in FIG.
Can be bent 90°. Once the desired winding is done,
The resulting winding can be fixed by tightening a tightening screw 13 provided near the end of the winding rod 10. For this purpose, the tightening screw 13 passes through the U-shaped tightening element 12 as a further rod and the winding rod 10 and is tightened, for example with a nut.

In the embodiment of the invention shown in FIG.
A wrap of at least 270° is provided. In this case, the other rod has the shape of two square tubes 14,
The connection is made by a tightening screw 15 which passes through the winding rod 10 outside the area of the slot 9.

A further embodiment of the closure device 8 is shown in FIGS. 5-9. The flattened opening area 7 of the container 1 is inserted again into the slit 9 of the winding rod 10;
The edge of the opening area 7 is then located inside the winding rod 10.

In order to fix the opening area 7 wrapped around the winding rod 10, in the embodiment according to FIGS. Fitted upwards;
The sleeve 16 permanently covers the wound opening area 7. In this case, the vertical slit 21 of the sleeve 16
Both longitudinal edges of contact the upper part 2 and the lower part 3 of the container 1. In FIG. 5, the winding rod 10 and the sleeve 16 have a rectangular irregular cross section, so
They are held so that they cannot rotate relative to each other. The opening area 7 is thus closed and the fitted sleeve 1
6 reliably prevents the opening range 7 from coming off the winding rod 10.

In the embodiment according to FIG. 6, the modified cross section of the winding rod 10 and the sleeve 16 is triangular. In this case as well, both members 10, 16 are held so that they cannot rotate relative to each other.

In the embodiment of the closing device shown in FIG. 7a, the winding rod 10 and the sleeve 16 have a circular cross-section, so that an additional detent must be provided in this embodiment. This detent piece is shown in Figure 7b. The end of the sleeve 16 is provided with a notch 20, and after fitting the sleeve 16 onto the winding rod 10, a radially extending pin 19 provided at the corresponding end of the winding rod 10 acts as a detent. It fits into the notch 20. A longitudinal slot 21 in the sleeve 16 also serves as an incision 20.
In this case, the vertical slit 21 is further inserted into the sleeve 16.
It serves as a guide for fitting.

In the embodiment of the closure device shown in FIGS. 8 and 9, the sleeve 16 has a U-shaped cross section;
It is inserted onto the winding rod 10 at right angles to the axis of the winding rod 10, and thus from the right side in the drawing. In order to prevent the sleeve 16 from slipping out of the opening area 7 wrapped around the winding rod 10, an additional stopper is provided. For this purpose, in FIG. 8b, a latch 17 is rotatably mounted on the sleeve 16 so that the sleeve 16
Before and during fitting onto the winding rod 10, it is in the position shown by the chain line. Wrap the sleeve 16 around the rod 1
0, the latch 17 is turned downward to the position shown in solid lines, thereby preventing the sleeve 16 from coming off. Another possibility is shown in FIGS. 9a and 9b, in which a clamp-like ring 18 is fitted on each of the ends of the sleeve 16.

In the illustrated embodiment, only one closure device 8 is required, since the container 1 is constructed like a bag. However, it is also possible to use as container 1 a bag-shaped semi-finished product which is open at both ends, in which case two closure devices 8 are required. Thereby, the volume of the container 1 can be reduced from both sides to a predetermined volume.

[Brief explanation of drawings]

1 is a side view of a flexible container with a closure device filled with a flowable article; FIG. 2 is a plan view of the container according to FIG. 1; FIG. 3 is taken along line A--A in FIG. 4 is a cross-sectional view of the first embodiment of the closure device, FIG. 4 is a cross-sectional view of the second embodiment along line A-A in FIG. 2, and FIG. 6 is a sectional view of the fourth embodiment taken along the line A-A in FIG. 2, and FIG. 7a is a sectional view of the fifth embodiment taken along the line A-A in FIG. 2. 7b is a plan view of the device according to FIG. 7a, FIG. 8a is a sectional view of the sixth embodiment along line A-A in FIG. 2, and FIG. 8b is a plan view of the device according to FIG. 7a.
A side view of the device according to the figure, Figure 9a is the second
A sectional view of the seventh embodiment taken along line A-A in the figure, No. 9
Figure b is a plan view of the device according to Figure 9a. 1... Flexible container, 7... Opening range, 9... Slit, 10... Winding rod, 12, 14, 16...
Separate rods (tightening elements, square tubes, sleeves).

Claims (1)

[Claims] 1. Upper part for transporting and storing flowable articles 2.
The closure device for a flexible container consisting of a tubular or bag-like semi-finished product consisting of a lower part 3 and a lower part 3 has a wrapping element, around which the opening area 7 of the container 1 is wrapped to prevent it from unraveling. In those who are
The winding element is a rigid winding rod 10 having an axially extending slit 9 into which the opening area 7 of the container 1 whose end is inserted is located.
is bent at the opening edge of the slit 9 so that it can be wrapped around the winding rod 10, and the opening area 7 wound around the winding rod 10 is circumferentially at an angle of at least 270° from the opening edge of the slit 9. Closing device for flexible containers, characterized in that a further rod 12, 14, 16 is provided which clamps onto the wrapping rod 10 at a remote location. 2. A patent characterized in that the length of the wrapping rod 10 is approximately equal to the width of the container 1 filled with articles, and the height of the entire closure device 8 is approximately equal to the height of the container 1 filled with articles. Closing device according to claim 1. 3. Closing device according to claim 1, characterized in that the opening area 7 of the container 1 has a neck 6. 4. Closing device according to claim 1, characterized in that the further rod is constituted by a rod-shaped tightening element 12, which is connected to the winding rod 10 by means of a tightening screw 13. 5. Closure according to claim 4, characterized in that the clamping element 12 is constructed as a strip with a U-shaped cross section for partially or completely supporting the winding rod 10. Device. 6. Another rod is constituted by two square tubes 14 or irregular cross-section rods facing each other and connected by a tightening screw 15 passing through the winding rod 10 at a point other than the extension line of the slit 9 of the winding rod 10. Closing device according to claim 1, characterized in that: 7 The further rod is constituted by a sleeve 16 which can be fitted onto the winding rod 10 fixedly surrounding the opening area 7 to be wound, which sleeve
The closing device according to claim 1, wherein the closing device is held so as not to rotate relative to the winding rod 10 in the fitted state. 8. Claim 7, characterized in that the sleeve 16 and the winding rod 10 have a modified cross section different from a circular cross section, whereby the sleeve 16 is held non-rotatably on the winding rod 10. Closing device as described in Section. 9. Closing device according to claim 7 or 8, characterized in that the modified cross section of the sleeve 16 and the winding rod 10 is square. 10. Closing device according to claim 7 or 8, characterized in that the modified cross section of the sleeve 16 and the winding rod 10 is oval. 11 When the sleeve 16 is placed on the winding rod 10,
8. Closing device according to claim 7, characterized in that it is held so that it cannot rotate relative to each other by a detent piece. 12 The end of the sleeve 16 is provided with a notch 20 and the winding rod 10 is fitted into the sleeve 16.
Claim 1, characterized in that a radially extending pin (19) provided at the corresponding end of the sleeve (16) fits into a notch (20) in the sleeve (16).
Closing device according to paragraph 1. 13. Closing device according to claim 12, characterized in that the longitudinal slit 21 in the sleeve 16 is also used as the cut 20. 14 Vertical slits 21 at both ends of sleeve 16
are provided at both ends of the winding rod 10, respectively.
Closing device according to claim 13, characterized in that it is used for fitting two pins (19). 15. Claims 7 to 1, characterized in that the sleeve 16 is made of an elastic material and is frictionally connected to the outer surface of the wound opening area 7.
Closing device according to one of clause 4. 16 The height of the vertical slit 21 is slightly smaller than the height of the flattened opening area 7, and the vertical edges of the vertical slit 21 of the sleeve 16 fitted onto the winding rod 10 are connected to the upper part 2 and lower part 3 of the container 1. Closing device according to claim 15, characterized in that it contacts the. 17. Closing device according to one of claims 7 to 16, characterized in that the opening in the end face of the sleeve 16 opposite the inlet opening is closed by a plate. 18. Claims characterized in that two sleeves 16 are provided which can be fitted onto both ends of the winding rod 10, the length of each of these sleeves being less than half the overall length of the winding rod 10. 7th
Closing device according to one of paragraphs 1 to 17. 19. The sleeve 16 has a U-shaped cross section, can be fitted onto the winding rod 10 at right angles to the axial direction of the winding rod 10, and is provided with anti-slip pieces at both ends of the sleeve 16. A closure device according to claim 7 or 8, wherein: 20. Claim 1, characterized in that the anti-slip piece is configured as a latch 17 which is pivotally connected to the sleeve 16 and engages with the winding rod 10.
Closing device according to paragraph 9. 21. Closing device according to claim 19, characterized in that the locking piece is configured as a ring 18 that can be fitted onto the end of the sleeve 16. 22. Closing device according to claim 1, characterized in that the end of the opening area 7 which enters the slit 9 of the winding rod 10 lies within the winding rod 10.