DE2346139A1 - COVER DEVICE, IN PARTICULAR FOR SWIMMING POOLS - Google Patents

Description

DipL-Ing. Herbert Braito 795 Eibemch / Riß l ^{1: L} · Sept. 1973

Patent attorney. Marktplatz 38 - P.O. Box 127

Telephone (07351) 6455

7 O 1783

Oberschwäbisehe metal goods factory GmbH & Co. KG

794 Riedlingen / Württemberg

Covering device, especially for swimming pools (addendum to patent (patent application P) 2 257 231)

The invention relates to a covering device, in particular for Schwircribecken, with a flexible cover sheet that ends with one end Can be rolled up on a Wicke1 drum and is powered by a motor can be unrolled from the drum by tensile forces exerted on its other end, whereby according to patent (patent application P) 2 257 the drum is mounted on a carriage that can be moved by a reversible drive motor by means of two side bogies a holding means for holding the cover sheet taut, and wherein the traction motor by overrunning clutch means in its first direction of rotation to pull out the cover sheet with the Fahrv.-recognize and can be coupled to the drum in its second direction of rotation for rolling the cover sheet.

According to one embodiment of the main patent, the drive motor works Via two overrunning clutches, which come into engagement when the motor rotates in the opposite direction, when the Cover sheet on the drum and when pulling out the cover sheet on a chassis of a carriage that carries the rotatable drum and can be moved along the edge of the pool. · The driven wheels the two bogies are connected to each other by a coupling shaft running parallel to the drum, and one must be mostly fixedly arranged special cable drum for connection

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of the undercarriage motor arranged on a landing gear frame is provided will. There the control devices are attached to the movable carriage, so that additional control lines between the car and the fixed junction must be placed. In this way it is a complete one by control command automatic covering of a swimming pool or another corresponding open space is possible, but the effort is still relatively high.

The object of the invention is therefore to simplify the cover device according to the main patent and to use it as much as possible cheaper and less reliable working parts.

For this purpose, according to the invention, the gear motor is designed Drive motor arranged in the drum and its housing the drum firmly connected, its drive shaft is also rotatably supported on a frame part of a chassis, and the The drum is driven by one overrunning clutch each with a drive wheel of the two bogies coupled.

Here the drum is the only connecting link between the two side bogies, so there is no need for a coupling shaft will. The drive motor is arranged completely enclosed in the drum and does not appear to the outside. There its housing is firmly connected to the drum, this can also be used as a cable drum for the power supply lines will. The cable does not need any control lines, since the control is expediently carried out from a stationary point will. Not a single current path leads through a rotating union, as is necessary with a separate cable drum. The number of items is significantly reduced, which the total cost of coverage and the weight of the cart accordingly be lowered. You therefore come with very low drive powers off, usually with a conventional motor vehicle windshield wiper motor. There are also no special lateral ones Alignment means required, as the carriage aligns itself automatically when the web is rolled in and also when the

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Railway this can be kept so tight that sufficient at all times Alignment forces are available. If the car is braked in any way, the track remains even without the training Drive motor held sufficiently tight as a brake motor.

The support of the output shaft on the chassis frame is expedient designed as a brake in the manner of a slip clutch. When approaching a stop, the otherwise held motor shaft can rotate without mechanical damage may occur. Automatically 'acting limit switches are therefore not absolutely necessary. The drive wheel is also expedient supported by a brake that is effective at least during the rolling-in process towards the truss frame.

The propulsion wheel should have the largest possible outside diameter than the reel-up drum and there should be a resilient leveling means to level the intermediate drum and speed differences occurring be provided for the drive wheel. This ensures that the trolley is in the process of pulling out is always driven at a speed that is slightly greater than the Abrollgeschwiridigkeit the cover sheet. This is therefore also used in this process of movement without a separate one Effort always tightened and thus the carriage is constantly subjected to lateral alignment forces.

A slip clutch can serve as compensation means, which is connected with the overrunning clutch one behind the other between the drum and the drive wheel is switched on. It is even easier to use the compensating means by means of a tire arranged on the circumference of the drive wheel from v; form elastic deformable material such as rubber. Included As with the slip clutch, there is the possibility that this tire on the contact surface when its adhesive forces are exceeded something slips through and thus reduces the tension again. If the tire is sufficiently thick, however, such a thing occurs Slipping process does not occur, as the compensation deformation affects the respective engaged peripheral portions is limited and

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23A6139

new circumferential sections are always deformed when rolling and then be relaxed. This is particularly pronounced when the tire has uniformly distributed, radially outwardly projecting projections such as teeth or transverse ribs that are not in the circumferential direction are supported against each other.

The drive wheel can roll directly on the support surface, but it can also be an endless one rolling on the support surface The propulsion belt is wrapped around the propulsion wheel like a caterpillar and at least one deflection wheel also supported on the support surface be.

According to a preferred embodiment, the drive wheel is centric arranged to the drum, and the brakes and clutches are arranged close together and through a common Clamping means clamped against each other. It will be expedient the brakes and clutches are all formed by disk-shaped elements, preferably two disks of the overrunning clutches have elastic projections inclined in opposite directions to the circumferential direction in the manner of a Velcro coupling. All these parts can thus be attached centrally to the drum axis in a confined space.

The power supply cable should be approximately the same on the drum Change in the winding diameter as the cover sheet is wound up will. For this purpose, on the side of the winding area of the tarpaulin on the drum, a conical winding surface for a helical laid cable must be attached. However, the energy supply cable can also be designed as a thin cable tape, that is attached to the side of the cover sheet or in an edge loop the cover sheet is arranged and is wound up in a spiral shape.

It has also proven to be useful for storing the drum a rotationally fit with the drive motor output shaft? connected and to use bearing bolts that are resiliently rotatably connected to a frame part of the chassis by the brake.

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This bearing pin can be used to guide almost all connecting parts serve and enables quick and convenient assembly.

Finally, according to the invention, it is also proposed on both To provide drum ends identically designed connection units for a chassis and optionally a traction motor. You can then go to If desired, attach a drive motor to one or both drum ends in order to adjust the drive power to the respective requirements to be able to adjust by span, driving speed and the like.

hand for example

The invention is to be explained at / on the schematic drawing. Show it

1 shows a section along the line I-I in FIG a rectangular swimming pool with a cover device according to the invention,

Fig. 2 is a view of this swimming pool with cover device seen from above in Fig. 1,

Fig. 3 is a partial section along the line IH-III in Fig. 2 through a drum end with chassis,

Fig. 4 is a view from above of a drum end of a

modified cover device with conical cable drum part,

FIG. 5 shows an illustration corresponding to FIG. 4 Version with flat cable strap,

6 shows a view from above of a chassis with a caterpillar-like treadmill and

FIG. 7 this caterpillar arrangement seen from below in FIG.

According to FIGS. 1 and 2, a rectangular swimming pool is through End walls 1.2 and side walls 3.4 limited. A cover sheet 30 is at one end 31 by bolts or the like. 32 in the area of Front wall 1 attached to a flat horizontal support surface 5, that surrounds the swimming pool. The other end of the cover sheet is wound on a cylindrical drum 27, which two trolleys 43, 44 resting on the support surface 5 to a common movable carriage 45 connected. Each of the two undercarriages

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- ί-

includes a landing gear frame 46, a propulsion wheel 47 and two before and running wheels 48 arranged behind it.

According to FIG. 3, a gear motor 49 designed as a gear motor is fixedly attached to at least one end of the drum, preferably a commercially available windshield wiper direct current motor, which is operated with a voltage of 12 volts. On the centrally located to the drum axis 50 output shaft 4l of the traction motor is fixedly arranged a bearing pin 52 which is rotationally locked carries a first brake disk 53, which is supported on a frame part 55 of the chassis frame 46 via a second brake disk 54. A threaded shoulder 56 of the bearing pin is through a bore of the Frame part 55 passed through and surrounded by a helical compression spring 57, which is with adjustable force between the frame part 55 and two nuts 58 is supported. Outward are the feathers the two nuts and the two running wheels 48 through a hood 59 covered, which is plugged over the first-mentioned frame part 55.

The drum 27 is mounted on the bearing pin 52 by an end cap 60 firmly attached to it and a ball bearing 61. the End cap 60 is rotationally locked to a first clutch disc 62 connected, which with a further clutch disc 63 is an overrunning clutch forms. The two clutch disks weise_η on the facing them end faces resiliently flexible projections, such as short fiber attachments, which are so in relation to the plane of the disk are inclined in the circumferential direction so that they engage in one another essentially positively in a first direction of rotation and thus transmit a torque while rotating in a different direction lie against their discs and thereby result in a free-wheeling effect.

The second clutch disk 63 is connected to the wheel plate 64 of the drive wheel 47 in a rotationally locked manner. A propulsion tire 65 is drawn onto the outside of this wheel disk, the peripheral part of which is divided by transverse grooves into transverse ribs 66 protruding freely outward. The outer diameter of the drive wheel 47 is slightly larger than the diameter of the drum 27 with the fully wound cover sheet.

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The wheel plate 64 has a hub part b7 which is bent upwards in FIG. 3 and which is located between the bearing pin 52 and the ball bearing 6l lies. Notwithstanding this embodiment, the bearing can also be on the bearing pin, for example by means of a ball or needle bearing or outside of the ball bearing 6l on the end cap 60.

Between the wheel plate 64 and the brake disk 53 are two more Clutch disks 68,69 of a second overrunning clutch arranged, which are engaged when the direction of rotation is opposite to that of the clutch disks 62, 63, i.e. when the web is rolled in. Of the However, the coefficient of friction prevailing between the clutch disc 69 and the brake disc 53 is significantly smaller than that between the brake discs 53.5 * 1. It is therefore on the propulsion wheel 47 a significantly smaller braking torque is exerted than on the motor output shaft 51 'and this smaller braking torque also occurs only when rolling in the web, so that the trolleys are only slowed down and keep the cover web taut.

If necessary, the overrunning clutch 62, 63 can also be turned with a possibly by one or two disks to be formed one behind the other switched between the drum 27 and the drive wheel 47 will. The entire package of brake and clutch disks is always very thin.

It is also the thickness of this package so based on the length of the bearing pin 52 turned off that its shoulder surface 70, from which the screw attachment 56 extends, never on the frame part 55 can come to the plant. Since the bearing pin 52 axially on the one hand via the traction motor 49 on the drum and on the other hand via the nuts 58 and the helical spring 57 is supported on the frame part 55, the tension force of the spring 57 between this frame part and of the end cap 60 to the entire disk package located therebetween. It can also cover the entire undercarriage with coupling and Burning devices are removed from the drum after removing the hood 59 and loosening the nut 58.

The bearing pin 52 can, as previously assumed, in the axial direction

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device must first be connected to the drive shaft 51. This can by an adjusting screw or the like. done through an opening in the drum and possibly the end cap 60 is tightened therethrough. It seems better, however, the connection with this drive shaft only to be designed in a rotationally locked manner or with a slip-on coupling that is insensitive to axle differences in order to avoid any or only to exert low constraining forces on the shaft. The bearing pin can then, as indicated by dash-dotted lines, for example by a Support shoulder surface 71 on the inner ring of ball bearing 6l. The end cap 60 then forms a closed assembly unit with the chassis, which is simply pushed onto the cylindrical end of the drum, the bearing pin with the output shaft 51 comes into engagement and the end cap is somehow coupled to the drum, for example by two socket pins.

Because here the axial support force is not passed through the drive motor is, this structural unit is also functional with regard to the drive process if there is no drive motor at the respective end of the drum is available, i.e. you can insert a longitudinal motor at both or at only one end as required. Should the driving resistances For some reason it turns out to be too big for one motor, all that is needed is a second one at the other end of the drum Drive motor to be attached. The torque from one or two motors can, however, thanks to the great torsional rigidity of the Drum 27 can be removed evenly distributed at both ends.

Both traction motors can also be connected in parallel to common power connections that are permanently provided in the drum. It can also the end of a power cable is fixed to the drum in a manner to be explained later and directly to the motor connections be connected. The cable also only needs to have two current-carrying lines for the two connections of the traction motors. A third ground line can of course be provided, but because of the low voltage of 12 volts used here, it is in usually not required. The control can always be carried out by a fixedly arranged control device to which.

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the cables can in turn be connected without rotary contacts.

When the carriage 45 from its position in Figs. 1 and 2 in the right roll-up end position is to be retracted, then the drive motor 49 is switched on in a first direction of rotation, in which the motor housing with the drum 27 rotates clockwise around the drive shaft 51, which is controlled by the bearing pin and the brake 53, 54 is held in a rotationally locked manner on the frame part 55. The overrunning clutch 62, 63 is opened, i.e. the drive wheel 47 is retained no drive and only rolls freely, with a low braking force due to the freewheel brake 68,69,53 via the brake 53,54 is transmitted. The carriage 45 is therefore exclusively due to the tensile force exerted on the cover sheet 30 during the rolling-up process pulled to the right in Figures 1 and 2. Since this tensile force is exerted over the entire width of the cover sheet and the Car is somewhat braked, this results in an exact lateral alignment, which becomes greater the closer the car is to the the end of the track 31 attached to the edge of the pool comes. Additional centering means can therefore be omitted.

When the web is fully rolled up or the carriage 45 is against a stop pushes, the drum 27 is thus held, then the output shaft 51 rotates with the bearing pin 52 against the resistance of the brake disks 53,54 until the drive is switched off. As is known, automatic shutdown can be provided.

If the carriage 45 is now in the covering position, ie to the left in the 1 and 2 are driven, a counterclockwise torque is first applied directly to the drum 27, from this but also exerted on the drive wheel 47 via the overrunning clutch 62, 63, which is now closed. Because this wheel is independent of the respective The winding diameter always has a larger outer diameter than the drum with the cover sheet and directly on the support surface unrolls, it strives to move the carriage 45 at a greater speed than the respective unwinding speed

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corresponds to the tarpaulin. As mentioned, this can be switched on between the end cap 60 and the clutch disk 62 Slipping clutch or can be compensated by the fact that dag propulsion wheel briefly slides through on the support surface 5 in the meantime. However, it results in a practically complete one Compensation by the fact that the individual circumferential parts of the tire 65 are deformed largely independently of one another in the circumferential direction and then relax again. In this way, each transverse rib 66 comes to rest against the support surface 5 in a relaxed manner and is deformed without significantly affecting the adjacent transverse ribs, until they come free by about the difference in travel between the drive paths of the wheel circumference and the cover sheet. If really that Path difference is slightly greater than the deformation path, then only one of the transverse ribs slips through briefly without affecting the evenness the rolling process is impaired. In this direction of rotation, too, the brake 53 »5 ^ responds again when the Cover sheet is fully extended or the Pahr movement is blocked by an obstacle.

After Pig. H , at one end of the drum 27, a conical surface 7 ** bounded by two flanged disks 73 is formed, on which a cylindrical cable 75, which has only two current conductors 76, is wound in the form of a helical screw. The cone angle of the conical surface. 7 ¹ * is dimensioned in such a way that the angular diameter increases by approximately the same amount with each rotation wfe when winding the cover sheet, so the cable is always stretched in the same way as this sheet. Cables and conductors can also, as ^{indicated by dash-dotted lines at 75 'and 76 f} , be guided into a hem of the cover strip.

Another possibility is shown in Fig. 5. There is a flat cable strap 77 is provided, either on the edge of the cover sheet 30 firmly attached or drawn into an edge seam 78 of the cover sheet is. The cable tape has about the same thickness as the cover sheet and, like this, is wound up in a spiral shape, without that this results in substantial diameter changes.

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According to FIGS. 6 and 7, an endless caterpillar belt 79 made of rubber or another suitable material, which has at least one outer articulated gripping surface 80, is looped in circumferential grooves around a drive wheel 47 'and two deflection wheels ¹ 18 ^T so that it is over its entire length rests on the support surface 5 between the two deflection wheels. Here, too, a deformable tire can then be provided on the circumference of the drive wheel, provided that no slip clutch is connected upstream. However, there is little wear and tear if you allow a slip here, as is usual with belt drives. ·

The caterpillar design also has the advantage of a further increase the directional stability of the drive.

As shown in FIG. 2, the cover sheet can be made narrower than the basin and then in the middle, possibly buoyant Part rest on the water. This is particularly advantageous for outdoor pools, as the tarpaulin is then not lifted by the wind can be. Of course, the tarpaulin can also be wider than the basin or another area to be covered. this will usually be the case when greenhouse areas, sports fields or the like have to be covered. In this case, too, can the car 45 according to the invention practically without any change to Application.

It is also possible to use a net-like grid, e.g. fly screen, instead of the waterproof tarpaulin, this is in In some cases it is advantageous if, for example, it is not necessary to protect against light and rain, but impurities, insects etc. are to be kept away.

x) must be shielded

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Claims (16)

Expectations (Covering device, especially for swimming pools, with a flexible cover sheet, one end of which can be rolled up and attached to a winding drum and by means of motor power through on it other end exerted tensile forces can be rolled off the drum, according to patent (patent application P) 2 257 231.2 the drum is mounted on a trolley that can be moved by a reversible traction motor by means of two lateral trolleys and which is a holding means for holding the cover web taut, and wherein the traction motor is rotated in its first direction of rotation by overrunning clutch means to pull out the cover sheet with the chassis and in its second direction of rotation to roll in the cover sheet with the The drum can be coupled, characterized in that the drive motor (49) designed as a geared motor is arranged in the drum (27) and its housing is firmly connected to the drum, that the motor output shaft (51) rotatably on a frame part (55) of a chassis (43,44) is supported and that the drum is coupled via a one-way clutch (62,63) each with a propulsion wheel (47) of the chassis. 2. Apparatus according to claim 1, characterized in that the support of the output shaft (51) on the chassis frame as a brake is designed in the manner of a slip clutch. 3. Apparatus according to claim 1 or 2, characterized in that the drive wheel (47) by at least one during the rolling-in process effective brake (68,69,53) is supported towards the chassis frame (46). 4. Apparatus according to claim 1, characterized in that the The drive wheel (47) has a larger outer diameter than the drum (27) with the rolled-up cover sheet (30) and that a flexible one Compensating means (65) are provided to compensate for the differences in speed between the drum and the drive wheel. see is. B09813 / 01U 5. Apparatus according to claim 4, characterized in that the Overrunning clutch (62,63) and a slip clutch are switched on one behind the other between the drum (27) and the drive wheel (47). 6. Apparatus according to claim 4, characterized in that the compensating means by a on the circumference of the drive wheel (47) arranged tire (65) made of soft, elastic, deformable material how rubber is formed. 7. Apparatus according to claim 6, characterized in that the Tire (65) has uniformly distributed, radially outwardly projecting projections such as teeth or transverse ribs (66). 8. Device according to one of claims 3 to 7 »characterized in that that the drive wheel (47) directly on the support surface (5) unrolls. 9. Device according to one of claims 3 to 7, characterized in that one on the support surface (5) - rolling endless drive wheel (79) wb a caterpillar around the drive wheel (47 *) and at least one deflection wheel (48 ') is looped. 10. The device according to at least one of claims 1 to 6, characterized characterized in that the drive wheel (47) is arranged centrally to the drum (27) and the brakes and clutches are tight arranged next to one another and braced against one another by a common clamping means (57 * 58). 11. The device according to claim 10, characterized in that the brakes and possibly the clutches are all by disk-shaped Elements are formed, whereby each two disks of the overrunning clutches (62,63,68,69) are preferably opposite to the circumferential direction have inclined elastic projections in the manner of a Velcro coupling ■. 12. The device according to claim 1, characterized in that a 5Ö9813 / 01U - Ill - Energy supply cable (75) on the drum (27) with approximately the same Change in the winding diameter as the cover sheet (30) is wound. ^{13. The device according to claim 12, characterized in that a conical winding surface (7 1} O for a helically laid cable (75) is attached to the side of the winding area of the cover sheet (30) on the drum (27). lH. Device according to Claim 12, characterized in that the energy supply cable is designed as a thin cable band (77) which is attached to the side of the cover sheet (30) or is arranged in its edge loop (78) and is wound up in a spiral shape. 15. Device according to one of claims 1 to 11, characterized in that for mounting the drum (27) a rotatable with the output shaft (51) of the motor connectable and by the first brake (53.5 ¹ O resiliently rotatable on a frame part (55 ) of the chassis connected bearing pin (52) is used. 16. Device according to one of claims 1 to 11 or 15, characterized in that identically formed connections for a chassis (43, ¹ J ¹ O and optionally a traction motor (49) are provided at both drum ends. 509813 / 01U AT Blank page