DE102011000330B4 - Safety device for automatic rewind reels for cables, hoses and the like and automatic rewind reels for cables, hoses and the like with such a device - Google Patents

Abstract

A retractor safety device (10) with automatic rewinding means for cables, hoses and the like, the safety device (10) comprising means (11) for transmitting and reducing the rotational movement of a rotating shaft (12) of a strand carrying spool (13) of a reel (14) at least one pair of brake shoes (15, 15a) rotatably disposed inside a respective brake drum (16), the brake drum (16) fixed in a carrying and protecting housing (18) for the transferring means (11) and reducing the rotational movement is formed and the at least one pair of brake shoes (15, 15a) is able to move from a rest position to a working position by the centrifugal force, which arises during the rotation generated by the means for automatic rewinding, in which a corresponding friction surface (20) is pressed against the inner surface (21) of the brake drum (16), each brake shoe (15, 15a) is articulated by a first end (22) to a corresponding pin (23), the pin (23) is fixedly connected to a rotary body (24) which is rotated by the means (11) for transmitting and reducing the rotational movement is, wherein the axes of rotation of the pin (23) and the rotary body (24) are parallel.

Description

The present invention relates to a security device for automatic rewind reels for cables, hoses and the like.

Furthermore, the present invention relates to an automatic rewind reel-up equipped with such a security device.

Automatic rewind reels for cables, hoses, and the like are widely used on construction sites, in garages, in production lines, and generally wherever electrical power is used to power a light source or electrical energy device, air or compressed air, or other pressurized fluids or signals from a starting point must be routed over long distances.

Similar reels are also suitable for carrying measuring tape over long distances, as well as for electrical earthing cables and also for ropes and wire ropes in general.

Such retractors typically have elastic means for automatic rewinding which relieve the user of the cumbersome and often time-consuming task of manually rewinding the cable or hose by means of a crank or similar device.

These known and widespread retractors have a dangerous disadvantage that just depends on the elastic means for automatic rewinding. This drawback is due to the movements of the retracting cable or hose, the free end of which moves rapidly and unpredictably, which can hit persons or objects in the vicinity of the retreat path to the retractor.

From the DE 29 49 093 A1 a cable reel for winding an electrical cable is known. This cable reel has a coil spring that allows automatic winding of the cable on a drum. The cable reel includes a braking device that includes a disk and a friction wheel connected to the disk. On the disc there are two pins around which the brake pads are rotatable. When winding the cable, the friction wheel of the braking device is brought into contact with the inside of an edge of a drum.

The DE 10 2005 031 527 A1 discloses a storage device for a garden hose. This storage device comprises a storage drum for winding and unwinding the garden hose. To ensure that in a winding process made possible by a coil spring, the storage drum does not exceed a predetermined speed, a braking device is provided. This braking device is operatively connected via a gear with an internal toothing provided on the storage drum. The braking device further comprises an integrally formed with the gear centrifugal body, which can interact with a brake drum in operative connection.

The object of the present invention is to provide a security device for rewinders with automatic rewind, which is able to eliminate the mentioned disadvantages of the known reel-up.

It is within the scope of this object to provide a safety device for automatic rewind reels which provides for rewinding of the cable, hose or the like at a reasonable speed to avoid dangerous and unpredictable movement of the free end of the cable, hose or the like.

Furthermore, a safety device is provided, which can also be used in the known and already used automatic retractors.

Furthermore, a security device is provided which is easy to adjust to reelers with automatic rewind for a variety of purposes and for different sizes.

Another important object of the present invention is to provide an automatic rewind reel-up equipped with a safety device according to the above object.

Finally, a safety device for automatic rewind reels for cables, hoses and the like, and an automatic rewind reel-up with such a safety device, which can be manufactured with known equipment and techniques and at moderate cost, are provided.

These objects are achieved by the subject matter of claim 1. Advantageous developments of the invention are indicated in the dependent claims, the description and the accompanying figures.

In essence, these objects, which will become more apparent hereinafter, are solved by a reel for cables, hoses and the like having a strand carrying coil connected to the rotary shaft so as to rotate with respect to a holder body, the coil being resiliently urged is connected for automatic rewinding, characterized in that it comprises a safety device, which is provided with means for transmitting and reducing the rotational movement of the rotary shaft of the spool to at least one brake shoe, which is rotatably arranged inside a corresponding brake drum, wherein the jaw in is able to move from a rest position to a working position by the centrifugal force generated during the rotation produced by the automatic rewinding means, in which a corresponding friction surface is pressed against the inner surface of the drum.

• 1 eine geschnittene Vorderansicht einer erfindungsgemäßen Sicherheitsvorrichtung in einer ersten Ausführungsform;
• 2 eine perspektivische Explosionsdarstellung der erfindungsgemäßen Sicherheitsvorrichtung in ihrer ersten Ausführungsform;
• 3 einen Teil des durch die Schnittlinie III-III in 1 angedeuteten Schnitts;
• 4 einen Teil des gleichen Schnitts gemäß der Schnittlinie III-III der 1, von einem gegenüber 3 abgewandten Blickpunkt aus betrachtet, wobei sich die erfindungsgemäße Vorrichtung in der Ruhestellung befindet;
• 5 den gleichen Schnitt wie in 4, wobei sich die erfindungsgemäße Vorrichtung in der Arbeitsstellung befindet;
• 6 eine geschnittene Seitenansicht des in 4 gezeigten Teils der erfindungsgemäßen Vorrichtung;
• 7 eine geschnittene Seitenansicht des in 5 gezeigten Teils der erfindungsgemäßen Vorrichtung;
• 8 eine geschnittene Seitenansicht einer erfindungsgemäßen Vorrichtung in einer zweiten Ausführungsform;
• 9 eine geschnittene Seitenansicht eines Teils einer erfindungsgemäßen Vorrichtung in einer dritten Ausführungsform;
• 10 eine Ansicht gemäß der Schnittlinie X-X der 9;
• 11 eine geschnittene Seitenansicht eines Teils einer erfindungsgemäßen Vorrichtung in einer vierten Ausführungsform;
• 12 die Ansicht gemäß der Schnittlinie XII-XII der 11;
• 13 eine geschnittene Seitenansicht einer erfindungsgemäßen Vorrichtung in einer fünften Ausführungsform;
• 14 eine geschnittene Seitenansicht einer erfindungsgemäßen Vorrichtung in einer sechsten Ausführungsform;
• 15 eine geschnittene Seitenansicht einer erfindungsgemäßen Vorrichtung in einer siebten Ausführungsform; und
• 16 eine geschnittene Seitenansicht einer erfindungsgemäßen Vorrichtung in einer achten Ausführungsform.

Other features of the invention will become apparent from the description of eight preferred but not exclusive embodiments of the automatic rewind winder retractor safety device of the present invention, illustrated by way of non-limitative example in the drawings, in which:

• 1 a sectional front view of a safety device according to the invention in a first embodiment;
• 2 an exploded perspective view of the safety device according to the invention in its first embodiment;
• 3 a part of through the cutting line III-III in 1 indicated section;
• 4 a part of the same section according to the section line III-III the 1 , from one opposite 3 viewed from the opposite viewpoint, wherein the device according to the invention is in the rest position;
• 5 the same cut as in 4 , wherein the device according to the invention is in the working position;
• 6 a sectional side view of the in 4 shown part of the device according to the invention;
• 7 a sectional side view of the in 5 shown part of the device according to the invention;
• 8th a sectional side view of a device according to the invention in a second embodiment;
• 9 a sectional side view of a portion of a device according to the invention in a third embodiment;
• 10 a view according to the section line XX the 9 ;
• 11 a sectional side view of a portion of a device according to the invention in a fourth embodiment;
• 12 the view according to the section line XII-XII the 11 ;
• 13 a sectional side view of a device according to the invention in a fifth embodiment;
• 14 a sectional side view of a device according to the invention in a sixth embodiment;
• 15 a sectional side view of a device according to the invention in a seventh embodiment; and
• 16 a sectional side view of a device according to the invention in an eighth embodiment.

According to the cited figures, a safety device for automatic rewind winder according to the invention for cables, hoses and the like is designated in its entirety by the reference numeral 10 designated.

This safety device 10 includes funds 11 for transmitting and reducing the rotational movement of a rotary shaft 12 a strand carrying coil 13 a retractor 14 to at least one brake shoe 15 that rotates inside a corresponding brake drum 16 is arranged.

In this first embodiment of the device according to the invention 10 There are four pairs of jaws, of which in 1 the first baking 15 and 15a for a first pair of jaws 17 and the second cheeks 15b and 15c for the second pair of jaws 17a are shown by way of example.

The baking pairs 17 and 17 each work inside a corresponding brake drum 16 or. 16a ,

In 1 is a hose 13a exemplified on the strand carrying coil 13 is wound.

With the strand carrying coil 13 and its rotary shaft 12 are the means for automatic rewinding connected in 1 partially visible and those from the coil spring 19 exist, which is known per se.

These means of rewinding are in another cut in 9 visible from the spiral shape of the spring 219 good to see.

The brake drum 16 as well as the brake drum 16a and the other two unnamed drums, is a housing 18 formed, which is also the holding and protection device for the means described later 11 represents for transmitting and reducing the rotational movement.

Each cheek of the baking pairs, 15 and 15a such as 15b and 15c , is capable of moving through the centrifugal force generated by the means for automatic rewinding, ie by the spiral spring 19 , generated rotation, from one into the 4 and 6 illustrated rest position in one in the 5 and 7 shown working position, ie to move the braking position, in which a corresponding friction surface 20 or. 20a against the inner surface 21 the drum 16 is pressed.

In this first embodiment, as well as in the following ones described herein, which are to be understood as illustrative and not restrictive, is any jaw, for example, the first jaw 15 a first end 22 to a corresponding pin 23 hinged, in turn, with a rotating body 24 firmly connected, the means 11 is rotated for transmitting and reducing the rotational movement, wherein the axes of rotation of the pin 23 and the rotary body 24 are parallel.

Every rotary body 24 has two symmetrical pins 23 and 23 , as in 2 it can be seen, each from a base 25 or. 25a go out, leaving the base 25 and the base 25a from the cylindrical middle part 26 of the rotary body 24 widen out in the radial direction.

In the first embodiment of the device according to the invention 10 include the funds 11 for transmitting and reducing the rotational movement of the rotary shaft 12 the strand carrying coil 13 an internal gear 27 that on the rotary shaft 12 is stuck and thus firmly with the strand carrying coil 13 rotates.

The internal gear 27 is as with known means and systems, such as a Keilmuffe 27a , Pins, wedges and other similar and equivalent systems, at the shaft 12 attached to understand.

The means 11 for transmission and attenuation also include for each rotary body 24 a pinion 28 ,

The rotary body 24 or. 24a is by means of the tubular cylindrical central part 26 drafts on a correspondingly shaped pin 29 is rotatably disposed inside the corresponding brake drum 16 of the housing 18 extends.

Every rotary body 24 is on his journal 29 with a fuse element 30 secured, so on the free end of the pin 29 screwed that there is between it and the pin an inner shoulder of the tubular cylindrical part 26 of the rotary body 24 sets.

The operation of the safety device 10 in the present invention will be described below.

While unwinding the hose 13a the spiral spring stretches 19 ,

The moment the user puts the hose 13a releases, displaces the coil spring 19 the sink 13 with high rotation speed in rotation.

This rotational speed is via the internal gear 27 and the pinion 28 at one end of the cylindrical center section 26 of the rotary body 24 is trained, transferred and reproduced.

In the sectional view of 4 are the cheeks 15 and 15a to see at rest, each one of a tension spring 32 or. 32a held at rest, from one side to a corresponding hole on the edge of the jaw 15 and from the other side at the base 25 is attached.

In 5 are the cheeks 15 and 15a as shown during the rapid rewinding of the hose 13a , So are arranged at rapid rotation, namely spread and with against the inner surface 21 the drum 16 pressed friction surfaces 20 and 20a ,

On the friction surfaces 20 and 20a are depressions 33 for just as many braking jobs 34 formed, which are shaped so that they from the corresponding surface 20 or. 20a protrude and are suitable for contact and friction against the inner wall 21 or with the respective surface 20 or. 20a to contribute to the contact with friction.

The cheeks 15 and 15a also have seats 35 in the present embodiment, consisting of through-holes into the weights for modifying the moment of inertia of the jaw and for enhancing its friction against the inner surface 21 the drum can be used.

The possibility of braking inserts 34 to use and the possibility of the mass of baking 15 and 15a to modify it allow the same Safety device according to the invention 10 to the most diverse reels with automatic rewinding, also known manner to adapt.

It should be noted that the invention also includes design solutions in which the number of jaws 15 and 15a , which is given here with two for each brake drum, may be different, and in which, for example, four jaws for each brake drum may be present.

It should also be noted that any safety device 10 only a brake drum 16 as well as two or more brake drums could, depending on the needs of the reel-up, in which the device according to the invention 10 is used.

• - das Trage- und Schutzgehäuse 18, an dem die Trommeln 16 ausgebildet sind, im Inneren derer wiederum die Zapfen 29 für die Drehkörper 24 und 24a ausgebildet sind,
• - die Drehkörper 24, die mit dem Ritzel 28 versehen sind, das zum Eingreifen mit dem Innenzahnrad 27 geeignet ist, und die die jeweiligen Backen 15 und 15a tragen,
• - das Innenzahnrad 27, bei dem es sich um einen einstückigen Körper aus Kunststoff handelt, der auch eine Muffe 27a zum Befestigen an der Drehwelle 12 der Strangtragespule 13 umfasst.

In the specific embodiment described above, the safety device according to the invention comprises 10

• - the carrying and protective housing 18 on which the drums 16 are formed, inside which in turn the pins 29 for the rotary bodies 24 and 24a are trained
• - the rotating bodies 24 that with the pinion 28 are provided to engage with the internal gear 27 suitable, and which the respective jaws 15 and 15a carry,
• - the internal gear 27 , which is a one-piece plastic body, which is also a sleeve 27a for fixing to the rotary shaft 12 the strand carrying coil 13 includes.

The protruding elements are preferably made by molding from plastic.

In a second embodiment, in 8th is shown by way of example in section, the device according to the invention, which is there by the reference numeral 110 is designated, inside the shell 140 the retractor 114 arranged yourself, and thus in the reel 114 itself integrated and not in an external housing as in the first embodiment of the present invention 18 regardless of the shell 40 the retractor 14 contain.

In this second embodiment, the drums are 116 on a first half shell 140a the Bowl 140 the retractor 114 educated.

In a third embodiment of the invention, which in the sectional views of 9 and 10 is shown, the safety device looks 210 instead of the internal gear of the first embodiment, an external gear 227 before, wherein the rotating body 224 with the pinion 228 and the corresponding cheeks 215 and 215a of the type described above for the first embodiment.

In a fourth embodiment of the invention, which in the sectional views of 11 and 12 is shown, the safety device looks 310 a belt drive 345 in front.

The belt drive comprises a drive pulley 327 that the gears 27 or. 227 replaced the previous embodiments, and a driven pulley 328 in place of the pinion described above for the previous embodiments 28 on the rotary body 324 is trained.

In the fourth embodiment of the invention, the device 310 inside an external housing separate from the reel 318 arranged and is to be attached with fasteners of a known type to a reel.

In 13 has the device according to the invention 410 in a fifth embodiment, a belt drive 445 on that inside a half shell 440a the Bowl 440 the retractor 414 is arranged.

In the fourth and fifth embodiments of the device according to the invention 310 or. 410 is the drive pulley 327 or. 427 a separate from the strand support coil and separate element by means of a sleeve 327a or. 427a is attached to the rotary shaft.

In a sixth embodiment of the invention, which in the sectional view of 14 represented and there by the reference numeral 510 is designated, is the drive pulley 527 on one of the shoulders 548 for receiving the wound tube of the strand carrying coil 513 self trained.

This design solution is particularly compact.

In a seventh embodiment, which is in 15 is shown schematically in section, which has the reference numeral 610 designated device according to the invention an external gear 627 and is inside the shell 640 the retractor 614 arranged, and thus in the reel 614 self-integrated.

In an eighth embodiment of the invention, which in the sectional view of 16 represented and there by the reference numeral 710 is designated, is the external gear 727 on one of the shoulders 748 for receiving the wound tube of the strand carrying coil 713 self trained.

The invention is also a rewinder 14 , or. 114 and 414 , with automatic rewinding for cables, hoses and the like of the kind with a strand carrying coil 13 that with her rotary shaft 12 is mounted so that it faces a support body, such as a receiving tray 40 . 140 or 440 rotates.

The sink 13 is with elastic means for automatic retraction, for example a coil spring 19 connected.

Such a reel 14 . 114 and 414 includes a safety device 10 . 110 or 410 as described above, with funds 11 for transmitting and reducing the rotational force from the rotary shaft 12 the coil 13 to at least one brake shoe 15 is provided inside a corresponding brake drum 16 is rotatably arranged.

As described in detail above, the cheek is 15 adapted to move from a rest position to a working position in which a corresponding friction surface 20 against the inner surface of the drum 16 is pressed.

In practice it has been shown how the invention fulfills the stated tasks.

In particular, the invention has provided a safety device for automatic rewind reels that accomplishes rewinding of the cable, hose or the like of an automatic reel-up at such a speed as to avoid dangerous and unpredictable movement of the free end of the cable, hose or the like due to friction which is generated by the contact between the rotating brake shoes and the inner surface of the brake drum.

In addition, the invention has provided a safety device which is also applicable to known and already used automatic retractors, since in their embodiments the sleeve of the gear or drive pulley is to be attached to an end of the shaft for connection to the rotating shaft of the strand carrying coil Shell of the retractor is located.

Finally, the invention has provided a safety device that is easy to adapt to automatic rewind reels for a variety of applications and sizes, since it is sufficient to vary the mass of the jaws or the friction between the jaws and the drum by using brake pads, by amplifying more than two jaws inside the same drum or by appropriately modifying the number of drums.

Moreover, the invention has provided an automatic rewind reel-up with a safety device that makes it safer.

Further provided by the present invention is a security device for automatic rewind reels for cables, hoses, and the like, and an automatic rewind reel fitted with a corresponding security device, which can be realized with known equipment and techniques and at a moderate cost.

The invention thus conceived may undergo numerous modifications and variations, all of which are within the scope of the inventive concept. In addition, all details are replaceable by technically equivalent elements.

In practice, the materials used, as well as the shapes and dimensions, are freely selectable according to requirements, without departing from the scope of the following claims.

Where a claim is followed by reference to the mentioned features and techniques, such reference numerals are only for the better understanding of the claims and consequently have no limiting effect on the design of an element designated by such a reference character.

Claims (8)

A retractor safety device (10) with automatic rewinding means for cables, hoses and the like, the safety device (10) comprising means (11) for transmitting and reducing the rotational movement of a rotating shaft (12) of a strand carrying spool (13) of a reel (14) at least one pair of brake shoes (15, 15a) rotatably disposed inside a respective brake drum (16), the brake drum (16) fixed in a carrying and protecting housing (18) for the transferring means (11) and reducing the rotational movement is formed and the at least one pair of brake shoes (15, 15a) is able to move from a rest position to a working position by the centrifugal force, which arises during the rotation generated by the means for automatic rewinding, in which a corresponding friction surface (20) is pressed against the inner surface (21) of the brake drum (16), each brake shoe (15, 15 a) is articulated by a first end (22) on a corresponding pin (23), the pin (23) with a rotating body (24) is fixed, which of the means (11) for transmitting and reducing the Rotary movement is set in rotation, wherein the axes of rotation of the pin (23) and the rotary body (24) are parallel. Device after Claim 1 characterized in that the means (11) for transmitting and reducing the rotational movement of the rotating shaft (12) of the strand carrying spool (13) comprises an internal gear (27) put on the rotating shaft (12) and a pinion (28) for each rotating body (24 ), wherein each rotary body (24) is mounted by means of a tubular cylindrical central portion (26) on a correspondingly shaped pin (29) extending inside the corresponding brake drum (16) of the housing (18). Device according to the preceding claims, characterized in that each jaw (15, 15a) is held in the rest position by a tension spring (32, 32a) projecting from one side against a bore at the edge of the jaw (15, 15a) and from the other Side is attached to a base (25). Device according to the preceding claims, characterized in that depressions (33) are formed on each friction surface (20) for the same number of brake inserts (34) which are shaped such that the brake inserts (34) are formed by the corresponding surface (20, 20). 20a), and capable of producing even the contact and the friction against the inner wall (21), or to contribute to the contact with friction with the corresponding surface (20, 20a). Device according to the preceding claims, characterized in that the device is arranged inside the shell (140) of a reel-up (114), integrated in the reel-up (114) itself. Device according to the Claims 1 . 3 or 4 , if not from Claim 2 dependent, characterized in that the device comprises an external gear (227). Device according to the Claims 1 . 3 or 4 , if not from Claim 2 dependent, characterized in that the means for transmitting and reducing provide a belt drive (345). Automatic rewind reel-up (14) for cables, hoses and the like having a strand carrying spool (13) mounted with its rotating shaft (12) such that the rotating shaft (12) rotates with respect to a supporting body, the spool (13) A device for automatic rewinding elastic type is connected, characterized in that it comprises a safety device (10) according to one or more of the preceding claims.

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