CN2032729U

CN2032729U - Projection screen rolling device

Info

Publication number: CN2032729U
Application number: CN 88211654
Authority: CN
Inventors: 倪海良; 倪玉良; 施兆忠
Original assignee: DASHA SCREEN FACTORY DONGTING VILLAGE WUXI COUNTY
Current assignee: DASHA SCREEN FACTORY DONGTING VILLAGE WUXI COUNTY
Priority date: 1988-04-18
Filing date: 1988-04-18
Publication date: 1989-02-15

Abstract

The utility model discloses a projection screen rolling device, mainly comprising a cylinder body, a hollow shaft and supporting devices which are used for supporting the hollow shaft and are arranged at both ends of the hollow shaft. The cylinder body is formed by squeezing aluminium alloy, the inner wall of the cylinder body is round, and the outer wall of the cylinder body is orthohexagonal; in squeezing process, each corner of the hexagon is squeezed in concave circle arc. The utility model has two schemes, one scheme is that the projection screen rolling device is used for large-sized projection screens, and the left end of the cylinder body and the hollow shaft are connected to form an integral body which is provided with a folding hand-operated handle C. The other scheme is that the projection screen rolling device is used for small-sized projection screens, and the hand-operated handle is not dispensed with. A torsion shaft is installed in the hollow shaft and is sheathed with a spring, the spring threads of one end of the spring are inserted on the hollow shaft, and the other end of the spring is inserted on the torsion shaft which is not rotary. The two projection screen rolling devices have compact structure and convenient carry over and use.

Description

Projection screen rolling device

Device is packed up in screen, and this device is specially adapted to the film and the projection screen of often frequent dismounting.

Till the utility model proposes, society goes up employed screen and packs up device at present, its cylindrical shell all adopts sheet iron to roll and forms, and the spring bearing lid at the tubular shaft two ends of volume screen is made of plastic, and its hand handle is (for the large-scale screen) that separates with tubular shaft.It is that the sheet iron cylindrical shell is because rigidity is not enough that its shortcoming of device is packed up in above-mentioned screen, in case the middle part pressurized just is easy to distortion, thereby make Screen Cloth block and wear and tear, the plastic support bearing used lid at tubular shaft two ends is because insufficient strength is damaged easily, moreover hand handle, the time spent is not laid down, and loses easily, and the work of giving often causes difficulty.

The purpose of this utility model is to provide a kind of cylindrical shell rigidity big, and device is packed up in the high screen of spring bearing lid intensity of tubular shaft.

Screen is packed up device and mainly is made up of cylindrical shell 14, tubular shaft 13, supporting cover etc.

In order to increase the rigidity of cylindrical shell 14, this cylindrical shell 14 is formed by aluminium alloy extruded, its inwall is a garden shape, outer wall is a regular hexagon, the time simultaneously each angle of regular hexagon is cut away in extruding and to be spill garden arc 22, the summit of this spill garden arc 22 is 1/45～1/55 of cylindrical shell 14 internal diameters to the thickness of cylindrical shell 14 inwalls.For screen can be pulled out or rolling is entered from cylindrical shell 14, its sidewall has one 55 °～60 ° otch, so both can guarantee the rigidity of cylindrical shell 14, can reach the purpose of weight reduction again.The spring bearing lid at tubular shaft 13 two ends is made of steel or iron, and has increased intensity and durability.For large-scale screen, tubular shaft 13 coils 12 and 17 welderings mutually with the garden on its end axle, is contained in respectively in the spring bearing

lid

9 and 19 by rolling bearing 10 and 18, and cylindrical shell 14 is contained in spring bearing

lid

9 and 19 outsides by screw retention.Hand handle C and tubular shaft 13 are connected as a single entity, and the time spent is not folded up, and also available turn-knob is fastened 5 lockings with a bolt or latch, and the time spent is opened locking, under the elastic force effect of spring 3, just hand handle C can be opened, thereby pack up with the large-scale screen that it will launch.

For small-sized screen, above-mentioned hand handle C is removed, the spring bearing with tubular shaft 13 two ends covers 9 and 19 lids 32 and 34 that change into by the sheet steel punching press simultaneously.Load onto in tubular shaft 13 and turn round axle 25, be with torque spring 26 on it, one end spring silk 27 is inserted in the breach 28, and other end spring silk 29 is inserted in the aperture of lid 30 of tubular shaft 13.The rectangular shaft 31 of turning round axle 25 left ends be inserted in cylindrical shell 14 left ends by the central rectangular aperture 31 of the lid 32 of sheet steel punching press ' in, the end axle 33 of tubular shaft right-hand member be contained in cylindrical shell 14 right-hand members by the hole, garden, center 33 of the lid 34 of sheet steel punching press ' in, turn round the hole, garden, center 35 that axle 25 left end shaft 35 are contained in the lid 30 of tubular shaft 13 left ends ' in.

Advantage of the present utility model and effect are:

1, cylindrical shell adopts aluminium alloy extruded forming, and rigidity is big, and is in light weight, and technology is simple, and outer wall is elegant in appearance.

2, for large-scale screen, the spring bearing at tubular shaft two ends lid adopts steel or iron, in rolling bearing is housed, intensity height not only, and very light when using.

3, for large-scale screen, hand handle and tubular shaft are one, not the time spent collapsible, can not lose, bring great convenience to use.

4,, saved hand handle for small-sized screen.In tubular shaft, be equipped with and turn round axle and torque spring, screen can be packed up automatically.

Below by accompanying drawing the technical solution of the utility model is implemented to elaborate further.

The device elevational cross-sectional view is packed up in the large-scale screen of Fig. 1

Fig. 2 is the A-A cut-open view among Fig. 1

Fig. 3 is that the device elevational cross-sectional view is packed up in small-sized screen

Fig. 4 is the B-B cut-open view among Fig. 3

The utility model mainly partly is made of the two end supports of cylindrical shell 14, tubular shaft 13 and tubular shaft 13.Fig. 1 and Fig. 2 have showed the organization plan of large-scale screen, and Fig. 3 and Fig. 4 have showed the organization plan of small-sized screen.Both common ground cylindrical shells 14 all are to be formed by aluminium alloy extruded, its inwall is a garden shape, its outer wall is a regular hexagon, in extrusion process, each hexagonal angle all pushed simultaneously and be spill garden arc 22(and see Fig. 2), in order to make screen in cylindrical shell 14, pull out or be rolled onto on the tubular shaft 13, have one 55 °～60 ° otch in cylindrical shell 14 1 sides.After being launched, screen can be suspended on the wall or on the shelf, outer wall at cylindrical shell 14 is located near two ends, be fixed with left and

right sides hangers

15 and 16, simultaneously after screen is packed up, the screen that is exposed at cylindrical shell 14 Outboard Sections is fixed with a transverse blocking-rod 20, its two ends are with a cap respectively, and in the flange that the termination of cap is supported about just in time dropping on.

The spring bearing that is contained in two ends, cylindrical shell 14 left and right sides for large-scale screen covers 9 and 19, is made of steel or iron, and it has increased support strength, and rolling bearing 10 and 18 is adorned within it respectively.Tubular shaft 13 two ends be welded with respectively band edge axle 8 and 8 ' garden dish 12 and 17, and end axle 8 and 8 ' respectively is contained in rolling bearing 10 and 18.Cylindrical shell 14 passes through screw retention with

spring bearing lid

9 and 19.

Hand handle C is contained on the sleeve pipe 7 of tubular shaft 13 left end shaft 8 by screw.Hand handle C is a folding, do not dismantle at ordinary times, when the time spent does not rotate lever arm 2 along clockwise direction around bearing pin 1, and holddown spring 3, the free end of rocking handle 6 is snapped in the bearing cap 9, with in addition locking of turn-knob door bolt 5, thereby make this screen pack up the apparatus structure compactness, when re-using or pack up screen, needs move along opposite direction, this moment, the elastic force of spring 3 was opened lever arm 2, made its bottom and relative contact the in fixed arm 4 bottoms, and (two arms are all small-sized channel-section steel and make along the bottom land of lever arm 2 and fixed arm 3 at the two ends of stretching out of spring 3, just the channel-section steel of fixed arm is littler) launch, two arms are fixed.Just screen can be packed up by hand handle C like this, be rolled onto on the tubular shaft 13 of cylindrical shell 14.

Another embodiment of the utility model is that device is packed up in small-sized screen, and it is that hand handle C is removed, and spring bearing

lid

9 and 19 lid 32 and the 34(that change into respectively by the sheet steel punching press at two ends, cylindrical shell 14 left and right sides are seen Fig. 3 and Fig. 4), and be screwed.Install additional in tubular shaft 13 and turn round axle 25, be with torque spring 26 on it, spring silk one end 27 is inserted in the breach 28; Other end spring silk 29 is inserted in the aperture of lid 30 of tubular shaft 13.The rectangular shaft 31 of turning round axle 25 left ends be contained in the central rectangular aperture 31 of the lid 32 that cylindrical shell 14 left ends are stamped to form by sheet steel ' in, the end axle 33 of tubular shaft right-hand member is contained in the hole, garden, lid 34 center that cylindrical shell 14 right-hand members are stamped to form by sheet steel.The hole, garden, center 30 of the shaft-cup 30 of tubular shaft 13 left ends ' be enclosed within is turned round on the axle journal 35 of axle 25, and like this, when small-sized screen twists in when needing to launch on the tubular shaft 13, as long as draw the cross bar 20 of screen termination, tubular shaft 13 just rotates; Do not rotate and turn round axle 25, then spring 26 is turned round, and it is many more that screen is pulled out, spring is turned round just big more, and screen launches the suffered torsion maximum of rear spring 26, therefore, as long as free the external force on the screen cross bar during cash register curtain, then screen is under the elastic force effect of spring 26, just automatic winding is to tubular shaft 13.

Claims

1, device is packed up in screen, it comprises cylindrical shell, tubular shaft and axle head supporting cover, it is characterized in that cylindrical shell 14 is a garden shape and outer wall becomes regular hexagon by aluminium alloy extruded one-tenth inwall, each drift angle of regular hexagon is spill garden arc 22 after extruding, this arc summit, garden is 1/45～1/55 of cylindrical shell 14 internal diameters to the thickness of cylindrical shell 14 inwalls, and has one 55 °～60 ° otch on cylinder lateral wall.

2, packing up device according to the described screen of claim 1 is characterized in that for small-sized screen, in tubular shaft 13, be equipped with and turn round axle 25, be with torque spring 26 on it, one end spring silk 27 is inserted in the breach 28, other end spring silk 29 is inserted in lid 30 apertures of tubular shaft 13, the rectangular shaft 31 of turning round axle 25 left ends be inserted in cylindrical shell 14 left ends by the central rectangular aperture 31 of the lid 32 of sheet steel punching press ' in, the end axle 33 of tubular shaft right-hand member be contained in cylindrical shell 14 right-hand members by the hole, garden, center 33 of the lid 34 of sheet steel punching press ' in, turn round the hole, garden, center 35 that axle 25 left end shaft 35 are contained in the lid 30 of tubular shaft 13 left ends ' in.

3, packing up device according to the described screen of claim 1 is characterized in that, its fixed arm 4 of hand handle C is connected as a single entity by the cover 7 on the end axle 8 with tubular shaft 13, removable wall 2 hingedly connects together by bearing pin 1 and fixed arm 4, and spring 3 is housed on the bearing pin between two arms 1, in order to obtain locking after making hand handle C folding turn-knob door bolt 5 being housed on the lever arm 2, in the lever arm end rocking handle 6 is housed simultaneously.

4, pack up device according to claim 1 or 3 described screens, it is characterized in that the spring bearing lid at tubular shaft 13 two ends is made of metal.