CZ281226B6 - Adjustable mounting for lighting device - Google Patents

Abstract

The tightening device (1) comprises a braking device formed by a ratchet braking wheel (9) firmly clamped between a threaded connecting part (11) mounted on the central pin (5) of the drum (4) for winding the support cable (27) of the tightening device (1) and a nut (10) with a friction disk screwed onto the threaded connector (11). The thread of the threaded connecting part (11) and the lock nut (10) has the opposite sense of pitch than the direction of rotation of the drum (4) during the descent of the support cable (27) and as a result clamp and friction between the ratchet brake wheel (9) is automatically maintained during operation. ) and its gripping components. In addition, the stripping device has a number of other improvements that increase its economy, facilitate assembly, extend its service life and ensure uniformity of quality in mass production.

Description

(57)

Puller (1) for luminaire and similar devices, consisting of a body. consisting of two bushings (2,3), a center pin (5) attached to the body, a winding drum (4) for winding a suspension cable (27) rotatable on said center pin (5), a braking group consisting of a ratchet brake wheel (9) mounted between the male threaded fastener (11) connected to the center pin (5) and an element mounted on the male threaded fastener (11) stably mounted in the recess (39). formed in the housing, and of a flat part (7) with latches (8) for connecting the ratchet brake wheel (9) to the winding drum (4). Said element is a friction plate (10) screwed by its thread onto a fastener (11) with an external thread, the thread of the fastener (11) and the thread of the friction plate (10) having the opposite sense to the rotation of the winding drum (4). a suspension cable (27) mounted on the winding drum (4).

Stripping device for luminaire

Technical field

The invention relates to a clamping device for a luminaire and other similar devices which can be adjusted vertically in order to adjust a suitable height.

BACKGROUND OF THE INVENTION

EP-0 018 434 A1 discloses a clamping device for a luminaire and the like, consisting of a body, of a center pin attached to the body, with a winding drum for winding a suspension cable rotatable on said center pin from a braking group consisting of toothed braking a wheel mounted between the male threaded fastener connected to the central pin and an element mounted on the male threaded fastener and stably mounted in the housing formed in the body and from the means for connecting the toothed braking wheel to the winding drum.

In this device, the friction system for retracting the luminaire is formed by clamping the brake wheel between the metal disc and the metal plate, the friction of the two metal elements acting on the brake disc being adjusted by turning the wing nut. In this system, the user must frequently check the wear condition of the metal elements and tighten the wing nut to maintain sufficient frictional force, and there is a risk of a sudden drop in the luminaire if the user does not frequently check this condition.

SUMMARY OF THE INVENTION

The aforementioned drawbacks are remedied by a stripping device for a luminaire and the like consisting of a body, of a central pin attached to the body, with a winding drum for winding a suspension cable rotatable on said central pin, from a braking group consisting of a ratchet wheel with an external thread connected to the central pin and an element mounted on the external thread fastener and stably housed in the housing formed in the body, and means for connecting the ratchet brake wheel to the winding drum according to the invention, the element is a friction plate screwed by its thread onto a fastener with an external thread, the thread of the fastener and the thread of the friction plate having the opposite meaning to the rotation of the winding drum when pulling the suspension cable on the winding m drum.

The stripping device according to the invention consists of a number of improved elements over the known devices, thereby improving its function, construction and its outer shape. The number of parts has been reduced, the puller has a simpler function, longer service life and lower production costs. The most important substantial improvement of the pulling device according to the invention is a completely new friction system, which is based on automatic regulation providing constant friction in use, so that the subject matter of the invention can be defined as an automatic pulling device for a luminaire. but he was excluded

Use in other areas, such as for hanging tools and equipment in industrial plants and production lines.

The compactness of the external design ranks the tightening device according to the invention among the smallest and most compact mechanisms currently available on the market, together with a very pleasant appearance. The mounting system, which is extremely simplified, is another feature. The component groups can be pre-assembled without affecting the final design of the final product. Pre-assembly can be done manually or mechanically, with the final product always being the same and of exactly the same quality.

In particular, plastics are preferred materials for all components of the pulling device of the invention, thereby significantly reducing manufacturing costs and ensuring consistency of product properties.

Overview of the drawings

BRIEF DESCRIPTION OF THE DRAWINGS The invention will be explained in more detail with reference to the accompanying drawings, in which: FIG. Fig. 3a shows a detailed cross-section of the puller and shows its individual parts in detail; Fig. 3a shows a cross-section of the puller and its components in an exploded state; Fig. 3b shows a cylindrical sleeve in perspective; and Fig. 3d in cross section of a ring with an outer smooth surface, Fig. 4a in side view and Fig. 4b in front elevation one embodiment of the left housing, Fig. 4c in side view and Fig. 4d in vertical section another embodiment of the left housing, Fig. 5a Fig. 5b is a cross-sectional view and Fig. 6b is a plan view of a winding drum with a spring. On the periphery of the drum there are four bosses with segmental recesses in which the teeth of the segmental shape of the component shown in FIG. 8 fit. 7 shows an enlarged plan view of the lower part of the winding drum according to FIG. 6. FIG. 6 shows a method of fastening the return spring and fastening the outer nylon cable. Giant. 8a is a cross-sectional view, and FIG. 8b is a plan view of a wheel that receives a winding drum. The component has four inner dovetail joint portions for engagement with the winding drum and four latches that engage the ratchet brake wheel teeth. Giant. 9 shows a plan view of the ratchet brake wheel. Giant. 10 schematically shows a plan view of an assembly of three components, i.e. the winding drum of FIG. 6, the components of FIG. 8, and the ratchet brake wheel of FIG. 9. FIG. 11a, 11b, 11c and Fig. 12 show different views of an improved hook for hanging a pulling device on the ceiling. Two types of hook are shown in the figures, a single hole hook (Figs. 11a, 11b, 11c) and a two hole hook (Fig. 12). Giant. 13 is a schematic view of the suspension hook of FIGS. 11a, 11b, 11c and 12 to which the pulling device is suspended. Giant. 14 is a cross-sectional view of the cable cover. The cover is screwed to the thread of the bottom of the coupled left and right sleeves of the puller and to the thread of the hinge of Fig. 17. The cable cover covers the top and bottom ends of the twisted cable. Giant. Fig. 15a shows a cross-section and Fig. 15b a front view of a coupling which can be used as a substitute for the above-mentioned suspension hook of Figures 11a-c and 12.

-2GB 281226 B6 is fitted with two threads and allows the suspension device to be suspended from the ceiling. Giant. Fig. 16 is an overall view of the puller with the cover of Fig. 14 mounted and the coupling of Fig. 15 mounted. 17a shows a front view and FIG. 17b a cross-section of a hinge for gripping and tightening the lower part of the twisted electric cable and thereby securing it.

DETAILED DESCRIPTION OF THE INVENTION

Fig. 1 shows a stripping device χ consisting of left sleeve 2 and right sleeve 2. The attribute left and right specifies the position of the sleeves 2, 2 in the drawing, while other attributes such as front and rear etc. can be used as well.

Between the housing 2, 2 i ^e stored winding drum 4, on which the central pin 5 is fixed a return spring 6, further flat portion 7 provided with pawls 8, which upon rotation of the flat member 7 in the clockwise direction slide over the teeth of the ratchet braking wheel £ and, when reversed, engages, a friction plate 10 screwed by its nut 38 onto an external threaded fastener 11 connected to the protruding portion 12 of the center pin 5.

A more detailed embodiment of the sleeves 2 and 2 is shown in FIGS. 4 and 5. In the left sleeve 2 there are two central seats 13 designed to receive two pins 14 provided on the right sleeve 2 which act as guide pins for connecting the two sleeves 2. 3, and an axial recess 16 into which a hollow rivet 22 for guiding the suspension cable 27 is inserted.

In the end portion 17 opposite the center beds 12, there is provided on the left housing 2 how many 18./ provided with a locking tooth 19 and intended to be inserted into an opening 20 provided in the right housing 2, this insertion being carried out until the locking the tooth 19 does not engage in the recess 21.

As shown in particular in FIGS. 1 and 2, the sleeves 2, 2 are connected on one side by a pin 18 to a detent tooth 19, and on the other side by a cylindrical sleeve 15 with an external thread 113 or only a ring 112 with a smooth outer surface. the male threaded sleeve 15 or the smooth outer surface ring 112 engages with its inner collar 104 behind the outer projections provided on the sleeves 2, 3, thereby holding the sleeves 2, 2 together (FIG. 2).

A cylindrical sleeve 15 with an external thread 113 is provided with recesses 114 at its upper edge. A recess 114 is inserted into the recess 114, extending laterally out of the lower part of the clamping device 1 before being connected via terminal block 109 to the power supply cable 111 from the ceiling.

The terminal electrical cable 110 is depressed in the recess 114 thereby securing the overall safety of the electrical connection during operation of the pulling device χ and the movement of the twisted electrical cable 24.

Ring 112 with an outer smooth surface performs the same function as a cylindrical sleeve 15 with an external thread 113. Ring 112

281226 B6 with a smooth outer surface is used when the ceiling rosette is not provided with a threaded connector but is only fitted to the tubular cover 23 (Fig. 14) of the suspension cable 27 and secured by friction.

Fig. 3a shows in detail the exploded state of the sleeves 2, 2 of the pulling device 1, between which a winding drum 4 consisting of a cylindrical body 25 provided with a flange 26 is arranged on one side. can be made of nylon. On the side of the cylindrical body 25 of the winding drum 4 opposite to the flange 26, a face 28 is provided circumferentially on which dovetail joint receiving portions 29 and a center pin 5 insertion hole 30 are provided. FIG. 3b shows a cylindrical sleeve 15 s 3 and 3c in longitudinal section. Fig. 3d shows a cross-section of the ring 112.

As shown in Fig. 7, the flange 26 is provided with two shaped notches 31 for automatically anchoring the hanger cable node 27 located within the cylindrical body 25. Two notches 33 are provided on the inner diameter of the cylindrical body 25 into which the outer hook is automatically engaged. end 34 of the return spring 6. The opposite end 35 of the return spring 6 is inserted into a notch 36 provided at the bottom of the center pin 5. This dual attachment allows tensioning and loosening of the return spring 6 both during presetting of the puller 1 and in normal use. .

The dovetail joint portions 29 provided on the winding drum 4 receive the dovetail joint portions 37 provided on the flat part 7, whose latches 8, when rotated counterclockwise, engage in the teeth of the ratchet wheel 9 and carry them with them during the light withdrawal phase, or when rotating in the opposite direction, the latches 8 release and strike the teeth of the ratchet wheel 9, thereby allowing the suspension cable 27 to be rewound on the winding drum 4.

This embodiment is illustrated in detail in FIGS. 8, 9 and 10, which show that the latches 8 are four and are thus able to withstand a considerable load during the downlight removal. When pulling down the luminaire, the suspension cable 27 unwinds counterclockwise, while when the luminaire returns upwards it winds up in a clockwise direction. In this second case, the latches 2 freely slide over the teeth of the ratchet wheel 9 / thereby allowing the suspension cable 27 to be wound onto the cylindrical body 25 of the winding drum 4.

The design of the pulling device 1 is improved because, due to the movement of the suspension cable 27 during the pulling of the luminaire, in which it rotates counterclockwise, the connecting means 11 with an external thread is screwed onto the friction plate. mounted in the recess 39 provided in the left housing 2, rotates counterclockwise and, due to the clockwise version of its thread, in the opposite direction of rotation, is tightened by the nut 38 of the friction plate 10 and tends to hold the ratchet wheel 9 in a pressure against the friction plate 10 and thus, by the action of friction, automatically regulate its operation. For this reason, do not lose a lot

However, even after prolonged use, it is composed of components that always tend to keep the ratchet wheel 9 engaged.

The efficiency of the solution according to the invention is not impaired by reversing the pulling direction of the suspension cable 27 and thus by unwinding it when the winding drum 4 rotates clockwise, and with respect to the left-handed threading, again in opposite direction to rotation. of the threaded device 11 retightens when counterclockwise.

The efficiency of the pulling device 1 according to the invention is not reduced even if pads of any material are inserted into the friction points on the inside of the ratchet wheel 9, where it touches the friction plate 10.

For example, the friction plate nut 38 is hexagonal, which ensures that the friction plate 10 will not rotate when the luminaire is pulled off because the nut 38 is housed in a corresponding seat provided in the left housing 2.

In the following, some other components will be described which increase the versatility of the puller 1 according to the invention and simplify its use.

Figs. 11, 12, 13, 15 show possible ways of hanging the clamping device 1 on the ceiling according to the requirements and regulations valid in different countries.

The upper part 42 of the clamping device 1 is hung on the suspension hook 40, 41 by inserting the tip 43 of each suspension hook 40, 41 into the slot 44 provided in the sleeves 2, 3 until the pin 18 with the locking tooth 19 engages. . The present ring 46 encircles the upper portion 42 of the clamping device 1 and engages behind the projection 47. The suspension of the clamping device 1 on the suspension hook 40, 41 is thus carried out by the tip 43 and the ring 46. ensuring the attachment of the pulling device 1 to any ceiling and with the ceiling rosette at any height.

The hanger cable tube cover 23 shown in Fig. 14, intended to cover the hanger cable 27, is loosely screwed onto the lower threaded portion 107 formed on the clamping device 1 which is screwed on top to the thread 108 of the hook hanger 51, see Fig. 17a .

11a, 11b, 11c and 12, it is possible to use a plug-in coupling 49 with two threads 100, 101, which also allows the clamping device 1 to be suspended on the ceiling. As shown schematically in FIGS. 15a and 15b and 16, the first thread 100 of the larger diameter plug connector 49 is screwed into the upper end portion 17 of the puller 1 and secured with a locking pin 102. A threaded tube screwed in the second thread 101 of the plug connector 49 s the smaller diameter is also secured by the locking pin 102 and allows the clamping device 1 to be connected to a suitable system using a plate and a lock nut.

-5GB 281226 B6

The hook hinge 51 shown in FIGS. 17a and 17b allows simultaneous placement and clamping of the electrical connection cable 50, thereby blocking it in operation by means of two arms 53, 54 and connecting the pulling device χ to the luminaire itself using a threaded shank which is screwed in into the threaded hole 52 of the hook hinge 51 and securing it with a locking pin 103.

Finally, the lid 105 may be attached to a suitable outer receptacle portion 106 of the right housing 3. A terminal box 109 may be attached to the right housing 3 to effect the connection of the terminal electric cable 110 to the lead-in cable 111 extending from the ceiling.

As can be seen from the foregoing, the fixture 1 for the luminaire is technically significantly improved and can be used for the widest range of applications.

PATENT CLAIMS

Claims (12)

1. for a luminaire and the like, a bolt (5) fastened to the winding of the suspension cable on the central pin (5), of a brake group, of a ratchet wheel brake wheel (9), fastened between a threaded means (11) connected to and , mounted on the connecting and stably mounted in the means of the sm, The egg retractor (1) of the body, of the center suction, of the winding drum (4) (27), rotatable with the connecting center pin (5), of the threaded means (11) preventing (39) formed in the ratchet body a brake wheel characterized by a plate (10) screwed in by its (11) with (11) the sense of the cable (27) mounted on the winding drum (4). for connecting the winding drum (4), that the element is a friction (9) with three threads on the fastener with an external thread, the thread of the fastener and the thread of the friction plate (10) having the opposite meaning to rotating the winding drum (4) The pulling device according to claim 1, characterized in that the winding drum (4) is provided with shaped notches (31) for connecting the suspension cable (27) and at least one notch (33) on the inner circumference for automatically connecting the outer hook end (34). ) return springs (6) for rewinding the suspension cable (27). The clamping device according to claim 1, characterized in that the winding drum (4) consists of a cylindrical body (25) and a flat part (7) connected by dovetail joints and provided with two flanges (26) for the suspension cable (27), which is wound around a central cylindrical body (25). The clamping device according to claim 3, characterized in that the flat part (7) of the winding drum (4) is provided with latches (8) which engage the teeth of the ratchet brake wheel (9) for connection in downward movement and it pops up when the suspension cable is rewound (27). -6GB 281226 B6 A clamping device according to claim 1, characterized in that the body consists of two bushes (2, 3) which, for their mutual connection, are provided with one or two loose connection pins (14) on one side and a pin (18) on the side. provided with a locking tooth (19) for engagement with a corresponding recess (21). A clamping device according to claim 5, characterized in that a central seat (13) is provided in the two sleeves (2, 3), in which a pin (14) for connecting the two sleeves (2, 3) is always mounted, the seats (13) at the same time form a hollow rivet shoulder (22) for guiding the suspension cable (27). A clamping device according to claim 1, characterized in that it is provided with a suspension hook (40, 41), on the one hand for locking the upper part (42) of the clamping device (1), and on the other hand for connecting and snapping the pin (18) from the sleeves (2, 3) with a tip (43) which is inserted into the respective slot (44). 8. A clamping device according to claim 7, characterized in that the suspension hooks (40, 41) or two holes (48) for attaching the height of the ceiling rosette. are provided with one to the ceiling at any 9. according to claim 6, characterized in that it is provided with a plug-in coupling 101) for coupling, wherein the first threaded portion is a top end The clamping device is by the threads (100, screwed into (2, 3) of the clamping device (1) and the second thread (101 on the shank), with systems using a hinge with a plate and a nut. and (49) with two threads (100) of the fuse housing part (17) Retracting device according to claim 1, characterized in that it is provided with a shaped hook suspension (51) for simultaneously clamping and securing the connecting electric cable (50) by means of two arms (53, 54) and connecting the luminaire using a threaded shank screwed into hole (52), at the threaded hook link (51). Retracting device according to claim 6, characterized in that it is provided with a lid (105) with two projections, which is housed in the outer receptacle (106) on one of the housings (2, 3) and in which the terminal block ( 109) for connecting a power supply cable (111) extending from the ceiling and an end electrical cable (110) of the stripping device (1). Retracting device according to claim 6, characterized in that it is provided with a cylindrical sleeve (15) with external notches cut outwards or with an internal collar (104) for connecting two central beds (13) provided with a recess (114) for receiving and securing the terminal electrical cable (110), and an external thread (113) for attaching the screw to the ceiling rosette.