DE2156667A1 - Hand locking seal made of plastic - Google Patents

Description

{J. I. JVi; j;

STOBA AG , 9326 Hoxn,

(Switzerland)

Handicraft seal made of plastic

The subject of the present application is a manual locking seal made of plastic.

There are a whole series of different types of! "- hand seals known from plastic, but all of them have certain disadvantages, be it that they require cumbersome and labor-intensive manufacturing processes and / or be it only that inadequate against manipulation for the purpose of dummy sealing are secured.

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One known construction (US Pat. No. 3,402,435) consists of a thread connected to a shield is. This shield has a slotted socket, which forms a head at the end of the fingers Catch the thread. The frame is at. but this construction is openly accessible, making it easy it is possible to spread the catching fingers and release the head from its locking mechanism To better protect construction against such tampering is suggested immediately behind to provide a constriction to the head and at the same time this constriction or constriction as a predetermined breaking point to train. However, this constriction requires an additional production step. the Ease with which the head can be released from its entangled position by spreading the catching fingers can also greatly reduce the effectiveness of these additional safety precautions, so that the additional manufacturing costs for these security precautions appear to be quite useless »

In another known construction (US Pat. No. 3,466,077) it is proposed to increase security against manipulation, the fingers of the socket completely in a housing surrounding this socket accommodate. With this known construction, one end of the housing is completely closed off. This in turn has significant disadvantages in production, as an additional work step is required to be exposed to heat and

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Pressure to close said one end of the housing by pulling in the wall. As such plastic seals A typical mass product, this additional work step is particularly important disadvantageous in weight.

In another known plastic hand seal (US Pat. No. 3,146,012), this is used as a locking device Serving slotted housing not only of complicated construction, but also only in turn very poorly protected against tampering with the seal, since the locking organs are accessible through openings. The same is true for another known construction (USA patent 3 367 701) in which, in addition, the organs forming the locking mechanism have complicated shapes.

The present invention solves the problem of the disadvantages and shortcomings of the previously known manual locking seals to avoid plastic and to implement a seal, which despite very 'simple construction and easy production possibility reliably against manipulations of all kinds, especially for purposes is secured by dummy seals.

For this purpose, according to the invention, a manual locking seal made of plastic, with a locking member having seal body, an associated flexible cord and one at the free end of this Strip the existing catching organ that can be inserted into the locking organ to close the seal

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and is lockable therein, the locking member having inwardly directed prong-shaped locking fingers and the catching organ has a head part forming a shoulder of such masses that it at The prong-shaped fingers enter the locking member resiliently spreads so that the between the headboard and a subsequent section of smaller cross-section formed shoulder after passing the ends the pinger snaps into the locking member, characterized in that a hollow housing with a inner, longitudinal bore is provided and which is arranged in the region of one end of the housing Locking element encloses at both ends is open, and that the ratio between the expansion of the housing in the longitudinal direction and the smallest cross-section of its bore at the other end is chosen so, that it prevents access to the locking elements from said other open end of the housing, when the head part of the flexible cord assumes its locking position in the locking member.

With such a hand seal according to the invention is the interlock, i.e. its parts, by means that would normally be readily available to a person are accessible, for example by pencils, ballpoint pens or the like. Cannot be reached. It is thus not possible for a person to release the interlocked parts again by, for example insert the end of a small pencil into the open end of the socket housing and your fingers slowly pressing on the frame while she

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early by moving the catching organ to and fro this ultimately releases from its locked position. The hand locking seal according to the invention is thus, despite this, they were previously known to this compared to dBn Hand seal no additional work step much better protection against manipulation of all kinds is required during production. It lies essential to the fact that the opening of the housing surrounding the socket has such a relationship between Has a length and diameter that makes it practically impossible to get to the catch fingers the seal is closed, although there is still enough freedom of movement for these catch fingers. as Further fuse can be found on the inside of the housing Projections are provided which prevent the locked head from moving back and forth could finally be released from its locking position in the transverse direction.

In the drawing, for example, embodiments of the subject matter of the invention are shown. It show ι

Figure 1 is a view of a first embodiment with an axial section through the socket housing,

Figure 2 is a plan view of the embodiment of Figure 1,

Figure 3 shows a section along the line III-III of Figure 1,

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Figure 4 on a larger scale parts of FIG Illustration of details,

FIG. 4a shows a section along the line IV-IV of FIG. 3,

FIG. 5 shows a section along dBr line V-V of FIG. 4,

FIG. 6 is a view corresponding to that of FIG fc Figure 1 of another embodiment farm,

7 shows a partial view from below of the embodiment of FIG. 6,

FIG. 8 shows a section along the line VIII-VIII in FIG. 6

Figure Ba is a section along the line A-A of Figure 8,

FIG. 9 a view of a third embodiment, and

FIG. 10 is a side view of the seal from FIG. 9.

Designated in the embodiment of Figures 1-5 10 generally a flexible fastening rib which is generally designated 20 at its free end Has catching head and at its other end with one side of a generally designated 30 relatively racially flat body connected. Of the Body 30 has on its opposite side

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a locking housing 40 which is provided with a socket with a locking element for the head 20. Of the Body 30 is in the 'illustrated embodiment of approximately rectangular shape and its thickness is slightly less than the diameter of that in cross section approximately circular flexible fastening strip 10. The body 30 could, however, also have a different shape and thickness if this is necessary for certain applications Seal should be desirable, for example, to include its front and back during manufacture Information to be provided. In addition, is shown in Example, the body 30 is provided with an edge 31 which has a main surface 32 recessed in this way, the is used to record information, a.g * frames. Such Information can, for example, by corresponding Engraving of the production form for the body 30 taken into account directly in the production of the body will. Near the point at which the flexible fastening cord 10 enters the body 30 passes over, a reinforcing bead 11 is provided.

The catching head 20 has a at its free end approximately triangular part 21, which is slightly has conically curved surfaces. This part 21 is closed against its rear surface 21 ' conically tapered section 22, which creates a predetermined breaking point immediately behind the part 21 which is primarily used in the event of undesired tampering with the seal and in particular with the Fastening cord 10 in connection with an attempt to release the seal will break. On the conical

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Section 22 is followed by a substantially cylindrical section 23, which in turn passes through an annular bead 24 similar to the reinforcement 11 is replaced which serves as a stop. A plurality of annular beads 25 at equal intervals follow the stop bead 24, form a non-slip grip point on which the cord 10 to and can be safely grasped when the seal is closed »

The housing 40 is formed by a cylindrical sleeve 41 which is open at the bottom and in a top Constriction 42 passes over. The constriction 42 has an-axial Bore 43, the diameter of which is slightly larger than the maximum outside diameter of the part 21 the catch head and the cylindrical portion 23, but smaller than the diameter of the stop forming annular bead 24, so that the head 20 with its part 21, the conical section 22 and the cylindrical Section 23 can be inserted into the bore 43 until the stop bead 24 against the upper End face of the housing 40 rests. Prong-shaped locking fingers 44, each of which on its inside directed surface part of a frustoconical Forms lateral surface, which is complementary to the surface of the section 22 of the cord 10, extend inward and downward in the sleeve 41 and thereby form an interrupted frustoconical section 45. The length of the frustoconical opening which is formed by the locking fingers 44 is approximately the same or only slightly larger than the length of the conical portion 22, and the

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The length of the bore 43 is approximately the same or slightly greater than the length of the cylindrical section 23, so that when the head 21 is inserted into the socket, when the stop bead 24 rests against the surface 42 'of the housing 40, the surfaces 44 ^{1 of} the fingers 44 engage behind the flat surface 21 'of the head part 21.

By choosing a sufficiently large ratio of the length L to the diameter D (Fig. 1, 3 and 5), for example by choosing this ratio greater than 5: it becomes impossible with the seal closed to the prong-shaped Fingers 44, especially when dBr diameter D is relatively small, for example about 6.5 mm or less. However, around the seal shown To secure even better against such possible manipulations, inwardly protruding ribs 47 are approximated triangular cross-section provided on the inside of the housing substantially from the open End of the cylindrical part 41 to the constriction 42 and between the locking fingers 44 run. By the presence of these ribs 47 effectively prevents the head part 21 from doing so to a considerable extent in the transverse direction to be moved, for example in a direction at an angle to the axis of the housing 40, as a result of which it is impossible for the head 20 to move back and forth from the lock formed by the fingers 44 Move toward pulling out while trying to spread your fingers. In addition, with one such an attempt and the associated pull in the string 10 break it at the predetermined breaking point, wherein the head part 21 remains in the socket in such a way that it cannot be retrieved, and thereby the manipulation carried out on the seal indicates.

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The embodiment shown in Figures 6, 7 and B. corresponds essentially to that of FIGS. 1-5, with identical or corresponding parts in this execution farm with an enlarged by 100 Reference number are provided. In contrast to the first embodiment, there is the flexible fastening rib in the example of Figures 6, 7 and B essentially flat and of rectangular cross-section, i.e. ribbon-shaped and its thickness corresponds essentially to the thickness of the seal body 130, while the width is a multiple this thickness is, as can best be determined by comparing Figures 6 and B, where the thickness is indicated by T (Figure 8) and the width by W (Figure 6). Next is the headboard of a similarly flattened shape, as can also be seen from FIGS. 6 and 8. The head part 121 iet further from partly frustoconical and partly cylindrical Shape and this part is in turn adjoined by a conical section 122, to which in turn a cylindrical section 123 and an annular bead 124 adjoining this, which 'the latter again forms a stop. Instead of annular beads 25, there are a row on the string 110 formed by fine, transverse ribs 125, which grip the cord 110 when closing the seal to enhance. In contrast to the cylindrical design of the housing 40, the housing 140 is of the example of Figures 6 - Θ is essentially rectangular in shape and has only two prong-shaped locks * - or locking fingers 144, as well as four ribs 147 from the narrow sides of the rectangle into the

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Opening protrude in this way around the free one To reduce the space towards the longer side of the rectangular opening. The ribs 147 serve same purpose "as in the first example, namely to prevent the head 120 from moving back and forth, as well as moving back and forth slowly can be worked out of the lock.

The ratio of the length L in this embodiment to the extent D ^! (Figures 6 and B) is again chosen so that it is 5: 2 or more in order to ensure that the seal is further secured against manipulation, in particular when the dimension D ^{1 is} at most 3.25 mm.

The embodiment of Figures 9 and 10 differs from that of FIGS. 6 - B only by the arrangement of two cutouts 160 in the cord 110, which cutouts are used to break the seal without the use of scissors or similar tools to ensure and at the same time to ensure that the seal breaks the flexible cord 110. Furthermore, of course, these cutouts serve as a weakening of the cross section of the cord 110 Predetermined breaking points at which the cord 110 will break if the seal is tampered with in an unauthorized manner will.

In addition to the predetermined breaking points described so far or other predetermined breaking points can take their place. As shown, for example, in Figures 6 and 9

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shows, a semicircular opening 126 in or be provided behind the shoulder 124 or in a shoulder which would correspond to the stop 24, and this opening can be selected with such a diameter that the cord 10 or 110 at this point breaks before it breaks at points 22 or 122.

In all the exemplary embodiments described, the smallest diameter of the tapered section tk 22 or 122 is selected, taking into account the plastic selected for the manufacture of the seal, so that each pull exerted on the cord for the purpose of moving the head 20 or 120 out of its locked position in the socket pulling out leads to a break in the predetermined breaking point between the foremost head part and the end of the conical section adjoining this before a major deformation and / or possible destruction of the locking fingers takes place. Of course, if there are further predetermined breaking points, the dimensioning can also be selected so that one of these breaking points or any other weakened point gives way before the locking fingers 22 or 122 break.

As is readily apparent from the foregoing, the seal according to the invention can be produced in a single operation without post-treatment and nevertheless offers a very high level of security against unauthorized manipulation.

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Claims (1)

PATEMTANSP R UEC H E Hand locking seal made of plastic, with a seal body having a blocking element, a flexible cord connected to it and a locking element at the free end of this cord, which can be inserted and locked in the blocking element to close the seal, the blocking element after having inwardly directed zinkenformige Sperxf irrger and Verfangorgan having a shoulder-forming head portion of such compositions that he spreads resiliently as it enters the locking member the zinc-shaped finger _t .nerem klei-between the head portion uni a subsequent section of cross-section so that the shoulder formed by Passing the ends of the fingers snaps into the locking element, characterized in that a hollow housing (4D) which is provided with an inner, longitudinally extending duct (43) and which is arranged in the area of one end of the housing encloses the locking element (44) open at both ends is and that the relationship between the Extension of the housing in the longitudinal direction and the smallest cross section of its bore at the other end is chosen so that it prevents access to the locking elements from said other open end of the genius when the head part (20) of the flexible cord (10). assumes its locking position in the locking member. - 13 - 209825/0674 2. Seal according to claim 1, characterized in that the ratio is at least 5: 2 « 3. Security seal according to claim 2 _t characterized in that the smallest dimension of the cross section is smaller than mm. 5 4 * seal according to claim 1, characterized in that the bore is circular or rectangular Has cross-section, 5. Seal according to claim 1, characterized in that the dimensions of said shoulder and of the Arischlieessenden section (22) with a smaller one Cross-section are chosen so that the connection of the head part (21) with said adjacent Section (22) forms a predetermined breaking point. 6. Seal according to claim 1 or 5, characterized in that that in the bore (43) of the housing inwardly projecting parts (47) are present which the freedom of movement of the head part. «(21) the flexible one Cable (10) when it is in the locked position located, in the transverse direction to the longitudinal axis of the housing to a minimum. 7. Seal according to claim 6, characterized in that dees this Teila by longitudinal ribs (47) are formed on the wall of the bore (43}. B. Seal according to claim 1, characterized in that - 14 - ^Jm ° ^L - ° ^aui 20 9 8 2 5/0874 that string (10) and housing (40) of circular Cross-section are. 9. Seal according to claim 1, characterized in that ■ that the cord (110), the trapping head (LZO) attached to it, and the housing (130) of flat, are approximately rectangular cross-section with a small thickness. 10. Seal according to claim 7, characterized in that that the cable is attached to the end f3 of a lead seal opposite the locking element and its housing body (3ü) are attached. 11. "Seal according to claim 10, characterized in that that said seal body is flat and the fastening cord, the catching head and the blocking element are of circular cross-section. 12. Seal according to claim 10, characterized in that that seal body, flexible fastening cord and catching organ, as well as the blocking organ, are flat are. 13. Seal according to claim 5, characterized in that the fastening strip has cutouts (160) or has openings (126) to form a predetermined breaking point. - 15 - 2098 25/0674 BATH ORIGINAL