DE7928574U1 - Tank screw cap especially for heating oil tanks - Google Patents

Description

PATENT LAWYERS

DIPL.-ING. P. EICHLER

BRAHMSSTRASSE 29. 5600 WUPPERTAL 2

Company Peter Metz Homa-Beschläge GmbH & Co KG

Uhlandstrasse 21, 5620 Velbert 1

Tank screw cap, in particular for heating oil tanks

The innovation relates to a certain particularly for fuel oil tanks Tankschraubverschluß, which is provided with a seated on a mouth portion of the filler neck screw, which is eat by a cylinder lock and ^J to an existing at the mouth piece closure flap in locking said interlockable closure thumb lockable.

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There are heating oil tank screw caps in which the screw cap with several, mostly four circumferentially evenly distributed locking tabs is provided, one of which is in the screwing end position of the Bring the screw cap into alignment with the closing flap provided on the mouthpiece of the tank filler neck and through the shackle of a conventional padlock, which is to be inserted through the closing eyes of these two locking cases can be completed so that the screw cap against unauthorized unscrewing and thus the valuable Tank contents can be secured against theft. However, as practice has shown, such tank screw caps can still be broken open easily, for example by pinching off the openly accessible locking tabs or through Cutting through the padlock shackle with the help of bolt cutters or the like.

In order to remedy this deficiency, it has been proposed by the applicant to cover the screw cap with a safety cap which is to be turned over the screw cap and the mouthpiece and its congruent closing tabs and which is hidden against axial removal by a safety cap that is concealed in it and accommodated with the closing tab on the mouthpiece or to be brought into engagement on the screw cap closure element, in particular a cylinder lock is to be secured. Such a solidly designed safety protective cap, consisting of a material that is correspondingly difficult to destroy, ensures a significantly better protection of the screw cap against violence

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to open. Still, however, such as a hinreic ^v _ e large spanner can dutch also fit a corresponding tool, the periphery of the safety cap this together with the will with her twisting secured to screw cap and mouthpiece from the filler neck still forcibly turned off.

The last-mentioned risk also exists with another HGis oil tank screw already proposed by the applicant " Closure in which the screw cap has no safety cap, so it just lies, but with an as Pressure cylinder lock trained cylinder lock is provided, the key-operated from the screw cap top Cylinder core with its locking thumb in a certain screwing rotation setting position of the screw cap with the in the closing lug of the mouthpiece is aligned with the existing closing eye and is to be retracted or extended axially therein Here, therefore, the closed screw cap can be forcibly unscrewed by a collet to be attached to its circumference be, with either his cylinder lock destroyed or else

the mouthpiece on the tank filler neck coupled with the screw cap so that it cannot twist.

The object of the innovation is therefore to provide a screw cap for fuel oil tanks in particular to create, which also offers increased security against unauthorized opening and in any case violent breaking open by turning off the closed screw cover using the appropriate collet chucks or wrenches Security prevented. This task is starting from a

Tank screw cap of the type mentioned in the introduction according to the innovation solved in that the screw cap with at least one its circumference encompassing, in the locks of the Locking thumb is provided with a freely rotatable safety rotating body. This way the screw cap becomes effective in its locked position by the safety rotating body mounted on it so that it can rotate freely Protected against unauthorized unscrewing or turning off, because the breaking tool to be used for this, i.e. a corresponding one A clamping wrench or a collet can only be attached to the circumferentially arranged safety rotating body, this, however, rotates freely, so no break-open torques are exerted on the screw cap itself.

It proves to be advantageous if the cylinder lock built into the screw cap, as already proposed, is designed as a pressure cylinder lock, the cylinder core of which can be key-operated from the top of the cover his locking thumb in a certain rotation setting position of the screw cap with that in the closing flap of the mouthpiece existing closing eye is aligned and is to be retracted and extended axially therein. In this case, the safety rotating body is advantageously designed as the screw cap also covering the top rotating cap, in the ceiling of which there is a closing and Coupling hole is in which the cylinder core in the unlocked or unlocked position of the pressure cylinder lock protrudes. This design of the screw cap is advantageous in several respects: On the one hand the screw cap not only becomes the screw cap but

also the pressure cylinder lock present in the latter is completely covered in its locked position, since then the The locking and coupling hole in the rotating cap will normally not be located just above the pressure cylinder lock. To the others only need the twist cap to unlock the screw cap or its screw cap that your locking and coupling hole with the pressure cylinder lock or its cylinder core is aligned, so that in this position the pressure cylinder lock can be actuated with the matching key can be unlocked effortlessly, with the cylinder core of the pressure cylinder lock in the Rotary cap retracts the existing locking and coupling hole and thus at the same time the one for unscrewing and re-screwing the screw cap produces the necessary non-rotatable connection coupling between the screw cap and the rotating cap.

According to a further feature of the innovation, the screw cap has one in its screwing end position the closing flap of the mouthpiece engaging the lower edge flange and retaining elements seated therein, which are in one of the The rotating cap protrudes all around the inside of the existing retaining groove. This on the one hand the at the mouthpiece Existing locking tab and the locking elements of the pressure cylinder lock to be brought into locking engagement with it, also on the side effectively covered, while on the other hand the rotating cap through the retaining groove on the inside protruding retaining elements is effectively secured against axial removal from the screw cap.

Finally, the innovation provides that between the

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Mfinduagsstück and the screw cap one in its screw locking device which is effective in the end position and which indicates the alignment of the locking thumb with the locking eye is provided, e.g. one engaging in a latching recess on the locking tab, Snap-in ball spring-supported on the screw cap. As a result, the operator when unscrewing the with the screw cap provided with the rotating cap each noticeably indicated when the locking thumb is over the locking eye of the Muzzle existing closing flap is located so that the operator can open the cylinder core of the pressure cylinder lock can be operated with the appropriate key, i.e. locked, which in the other case eliminates the laborious trial and error. There is no need to search for the corresponding rotary setting of the screw cap.

In the drawing is an advantageous embodiment a newly designed tank screw cap shown. It shows

1 shows a vertical section through the screw cap with the screw cap not yet screwed on ,

FIG. 2 shows a section corresponding to FIG. 1, but when it is screwed on and properly closed Screw cap and

3 shows a top view of the screw cap in its closed position corresponding to FIG Position.

The fuel oil screw cap shown is of conventional design in that it is a

The upper end of the tank filler neck 1 has a permanently attached mouthpiece 2 with a closing flap 3 and also a screw cap 4 which can be screwed onto the mouthpiece 2 or its thread 2 ' and is provided with a corresponding internal thread 4'. The pressure cylinder lock, generally designated 5, is housed in the screw cap, the cylinder core 7 of which is to be actuated from the screw cap top side by means of a suitable key 6 with its locking thumble 7 ¹ in a certain screwed rotation setting position of the screw cap 4 with that in the locking tab 3 of the muzzle piece 2 existing closing eye 3 'is aligned and is axially retracted or extended therein. For this purpose, the cylinder core 7 is seated in a known manner so that it can be axially displaced in a limited manner in the cylinder housing 8 of the pressure cylinder lock, the housing 8 being fastened in the screw cap 4 and possibly also protected against unauthorized drilling attempts by a steel cover plate 9.

The screw cap 4 also has a lower, all-round edge flange 4 ″, with which, in the screwed-on position according to FIG. Further, in this edge flange 4 '· of the screw cap 4 of Fig. 2 nor a radial bore 4 ^11' is present, in which an adjusting screw 10, a compression spring 11 and an are of the latter loaded locking ball 12, which in the Verschraubungsendlage of the screw cap 4 a corresponding latching recess on the locking tab 3 of the mouthpiece is able to jump in. This enables the correct screwing rotation setting

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of the screw cap 4 easily found by the operator will.

The screw cap 4 is also provided with a safety device that completely covers it both on the front and on the top. heitsdrehkappe 13 provided, which is in a corresponding, all-round retaining groove 14 of the cap 13 protruding retaining pins is secured. In the Cover 13 'of the rotating cap 13 is a closing and Coupling hole 16, which is kept slightly larger in diameter than the cylinder core 7 of the pressure cylinder lock 5.

As FIG. 1 shows, the cylinder core 7 of the pressure cylinder lock protrudes in its unlocked or unlocked position into the locking and coupling hole 16 in the rotating cap 13, whereby the rotating cap 13 is connected or coupled to the screw cap 4 in a rotationally fixed manner. As a result, the screw cap 4 can easily be screwed onto or unscrewed from the mouthpiece 2 dps filler neck 1 via its rotating cap 13. As soon as the screw cap 4 \ qelangt n saine right, noticeable solubilizing by the aforementioned latching device Verscl.ruabungendlage, ir <aligned the closed thumb 7 ¹ with the existing at the closing flap 3 closing eye 3 ', may with the aid of, matching key 6 of the cylinder core 7 actuated, i.e. axially displaced into its locked position shown in FIG.

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by the screw cap 4 holds closed. At the same time, the rotating cap 13 is from the screw cap 4 through the depressed cylinder core 7 has been uncoupled so that the cap 13 is then freely rotatable on the completed Screw cap 4 is. The rotating cap 13 is then expediently rotated by any angle so that its closing and coupling hole 16 outside the region of the pressure cylinder bolt 5 arrives and thus the latter, as FIG. 3 shows, is then completely covered by the rotary cap 13. Due to their free rotation in this locked position of the tank screw cap, it is impossible the screw cap by means of a twisting tool to be attached to the circumference of the rotating cap 13, e.g. a wrench, to turn it up or down forcibly.

For proper opening of the tank screw cap it is only necessary to turn the rotary cap 13 so that its locking and coupling hole 16 locks with the pressure cylinder 5 gets into cover, and then unlock the pressure cylinder lock with the help of the appropriate key 6, wherein then the cylinder core 7 moves into the locking and coupling hole 16 of the cap 13 and thereby the latter with the The screw cap 4 is coupled again so that the cap 4 with its cap 13 can easily be unscrewed from the mouthpiece 2.

Claims (4)

PATENT LAWYERS ■ »" '"^.« Oät'PHW.rf. STURlES DIPL.-ING. P. ElCHLER BRAHMSSTRASSE 29. 5600 WUPPERTAL 2 Protection claims J 1. Anti-tank lock, especially for heating oil tanks, \ with one on a mouthpiece of the tank filler neck seated screw cap, which is through a cylinder lock and its with one on the muzzle Closing tab to be brought into locked engagement locking thumb is lockable, thereby g e! indicates that the screw cap (4) is provided with a rotating safety body (13) which encompasses at least its circumference and is freely rotatably mounted in the locking position of the locking thumb (7 ^1). 2. Tank screw cap according to claim 1, in which the cylinder lock built into the screw cap is designed as a pressure cylinder lock whose cylinder core, which can be keyed from the top of the screw cap, is aligned with its locking thumb in a certain rotational setting of the screw cap with the locking eye present in the locking flap of the muzzle and is axially aligned therein can be retracted and extended, characterized in that the rotating safety body is designed as a rotating cap (13) which also covers the top side of the screw cap (4) and in the cover (13 ¹ ) of which there is a locking and coupling hole (16), into which the cylinder core C7) in the unlocked, i.e. unlocked position of the pressure cylinder lock (5) protrudes. 3. Tank screw cap according to Claims 1 and 2, characterized in that the screw cap (4) has an edge flange (4 ^IJ ) which engages in its screwing end position over the closing tab (3) of the Mündungsfcückes (2) and holding elements (15) seated therein which into one on the bumper cap (13) on the inside, all-round retaining groove (14) protrude. 4. Tank screw cap according to claims 1 to 3, characterized in that between the mouth piece (2) and the screw cap (4) a ^{locking device indicating the alignment of the closing thumb (7 1} ) with the closing ^{eye (3 1} ) is provided in its screwing end position , for example a locking ball (12) which engages in a locking recess (3 ¹¹ ) on the locking tab (3) and is spring-supported on the screw cap (4).