JPH01203581A - Sheet type elevating blind - Google Patents

Abstract

PURPOSE: To adjust the inclination angle of a blind by providing the disk secured to a drive shaft with a plurality of stopper to restrict the turning angle of a locker arm to support a link chain so that the stoppers abut on a holding finger. CONSTITUTION: When a drive shaft 9 is rotated clockwise, a locker arm 39 is rotated together with a stepped disk 53 and an arm 41 reaches a position where it becomes nearly perpendicular. The link chain 37 suspended from the arm 41 holds a thin plate 5 at the inclined position previously adjusted. When the drive shaft 9 is rotated counterclockwise, the locker arm 39 and the disk 53 rotate until the edges C, B or A of the disk 53 abuts on a holding finger 59. In addition, when the lowest thin finger 5 approach the lowest position, a lever 57 is oscillated by a control cam 19, and the finger 59 separates from the disk 53, and the disk 53 moves counterclockwise until the edge D of the disk 53 contacts with a stopper 65.

Description

Detailed Description of the Invention [Industrial Field of Application] The present invention provides a tensioning mechanism for raising and lowering the blind, which has a constant inclination angle of the thin plate during the lowering of the lifting blind, and is provided in a side guide. The present invention relates to a thin plate type lifting/lowering blind comprising a horizontally arranged drive shaft and a paired link chain provided in a side guide for swinging the thin plate.

[Conventional technology]

In the case of such laminated lifting blinds, in which the position of the laminae can be adjusted laterally by foldable vertical connections (e.g. hinge chains or pivot chains) housed in guide rails, The tilt angle is set at the factory. In the case of this known sheet metal lifting blind, it is not possible to change and adjust the angle of inclination of the lifting blind later on site.

Furthermore, in addition to the standard angle of inclination, thin-plate lifting planids are known in which the lowering angle of the blind can be made smaller or larger than the standard at the factory if desired. This known blind differs from the above-mentioned blinds in that it does not have a pivot chain for adjusting the lamella, but rather has an adjustment mechanism consisting of a textile connecting element mounted in the visible area of the lamella. By means of a reversing transmission unit with a switching mechanism in the top passage, the angle of the lamella during lowering can be adjusted at the factory to differ from the standard value and cannot be changed thereafter. It is not possible to apply this known technique to blinds with covered pivot chain adjustment elements integrated into the side guides.

[Summary of the invention]

Therefore, the present invention attempts to take countermeasures. As described in the claims, the present invention has the advantage of adjusting the inclination angle of the thin plate in the descending phase to the conditions of the site (south building facade, west or east building facade, etc.) or the room (video video).
The object of the present invention is to provide a thin-panel lift blind that can be easily adapted to the type of use (such as a work room with a television) and can be changed later if necessary.

An important effect of the present invention is that the tilt angle can be adjusted without disassembling the lifting device, and the condition of the position of the blind can be adjusted.
The advantage is that it can be adjusted later to suit the usage of the room behind it.

Another advantage is that the spring integrated in the drive allows the drive shaft to rotate further after the blind has been completely lowered without causing the drive wheels to rotate together.

This is particularly important in the case of electric drives, in order to compensate for adjustment errors and, during the swinging of the lamella to its lowest position, to prevent vertical movements that create a gap between the lowermost lamina and the window sill during the swing. It is possible to prevent this from occurring.

〔Example〕

Hereinafter, the present invention will be explained based on Examples.

For a better understanding of the invention, FIG. 1 shows a side guide 1 and a thin plate 5 of a blind (shutter) 7 of the lifting and adjusting mechanism provided thereon and housed in the casing 3. The most important elements needed for lifting, lowering and rocking are shown.

Inside the casing 3 of the lifting mechanism, a drive/guide wheel 11 is attached to a shaft 9 that connects both side guides 1. The drive wheel 11 may be fixedly connected to the shaft, or a clutch may be provided between the shaft 9 and the drive wheel. This clutch allows a rotational movement of the shaft 9 by a rotational angle of, for example, 100° relative to the drive wheel 11 in one direction and without entrained rotation. A coiled spring 13 can be provided, one end of which is connected to the shaft 9 and the other end connected to the drive wheel 11.
(See Figure 3). A tensioning mechanism 15 in the form of a perforated strip, a plastic band or a plastic lobe or link chain runs around the drive wheel 11. A locking member 17 is fixed to one end of this tensioning mechanism, and a control cam 19 is fixed to the other end. The hole or recess 21 of the tensioning mechanism 15 engages in a driver 23 provided on the outer periphery of the drive wheel 11 . The casing of the side guide 1 is formed with a groove 25. This groove is the tension mechanism 1
5 can be accommodated in the extended state with a little play. On the side of the locking element 17, the groove 25 is provided in particular on the side surface. On the side of the control cam 19, the groove 25 is arranged in particular at the corner between the back wall and the side wall of the lateral guide 1 at an angle of about 45@. In order to prevent the tension mechanism 15 from coming off the drive wheel 11, a guide plate 27 is provided a little apart from the outer periphery of the drive wheel 11. Of course, information board 27
Alternatively, the casing itself may serve as a guide, especially if the casing 3 is made of synthetic resin.

Furthermore, a guide track 29 is formed in the side guide 1 . A slide shoe or slide roller 31 is guided on this track. This slide shoe or slide roller is attached to the carriage 33 and guides it along a vertically extending track. The carrier 33 is provided parallel to the back wall of the side guide, is made of a molded metal plate or synthetic resin, is suspended from a pair of link chains 37, and is attached to the locking member 17 in the operating state. It is fastened and fixed.

A known paired link chain 37 is suspended from a rocker arm 39 swingably mounted on the shaft 9. The rocker arm 39 consists of two arms 41. Both chains of a pair of link chains 37 are fixed to this arm by ropes 35. rocker arm 3
9, a helically wound spring 45 of a brake cylinder 43 is provided on the shaft 9 so as to prevent relative rotation. Both ends 47 of the spring 45 project radially outward from the brake cylinder surface (see FIG. 3). Entraining segment 49, i.e. rocker arm 4
1 passes between the ends 47 and the stepped disc 53
is inserted into the recess 51 from the axial direction.

This stepped disc is mounted on the brake cylinder 43 on the shaft 9. The stepped disc 53 is the brake cylinder 4
3 is rotatably mounted on the top, and in the lower range there are four stages A.
, B, C, D, with another stage E formed in the opposite direction in the upper region. The steps of the individual steps preferably extend in the radial direction.

A vertical polygonal shaft 55 is rotatably supported inside the right side wall of the casing 3 . At the lower end of this polygonal shaft is a first lever 57 that protrudes in the radial direction.
are mounted in such a way that they do not rotate relative to each other, and a retaining finger 59, which also projects in the radial direction, is provided in the upper part of the shaft 5.
5 so as to be slidable in the vertical direction.

At its highest position (FIG. 1), the retaining finger 59 is in contact with the step A of the stepped disk 53. The retaining finger 59 can be lowered by means of a sliding device 61 so that it can engage with stage B or stage C. The end of the lever 57 is located next to the groove 25. In this groove the control iTJ cam 19 of the tensioning mechanism 15 is guided.

When the control cam 19 comes into the swinging range of the lever 57, the lever 57 swings together with the holding finger 59 mounted on the polygonal shaft 55 by the control cam 19. During this pivoting, the ends of the retaining fingers 59 are on the side of the stepped disc 53 and are no longer within the range of engagement with the steps A-C of the stepped disc 53.

A rotary knob 63 is located in the running path of the stepped disc 53.
A stopper 65 eccentrically provided is located at.

This rotary knob 63 is seated in a hole 67 in the front side of the side guide. Instead of an eccentric stop 65, a plurality of laterally spaced holes 66 can be provided. A stopper pin can be inserted into this hole, and the travel path of the stepped disc 53 can be restricted.

The step E of the stepped disc 53 rests on a stop pin 69 which is likewise provided on the front side of the casing of the lateral guide 1 and extends into the casing 3 . The stopper pin 69 can be formed similarly to the rotary knob 63 or can consist of a plurality of holes 71 arranged along a circular orbit. A locking pin can be inserted into each of these holes. A 20-locking pin limits the rotational movement of the stepped disc 53 or can be cast integrally with the casing 3.

Next, the operation of the thin plate type elevating blind according to the present invention will be explained in detail.

In the situation of FIG. 4, such as when the lamella 5 is being pulled up, the shaft 9 is rotated clockwise by a manual or electric drive acting on its end.

At that time, the edge E of the stepped disc 53 is connected to the stopper pin 69.
is in contact with. This stopper pin is inserted into a suitable hole 71 depending on the desired lifting and inclination angle of the thin plate 5. The stepped disc 53 remains in the position provided by the stop 69 throughout the lifting process. The rocker arm 39, together with the stepped disc 53, is rotated together by the segment 40, and the arm 41
is brought to a nearly vertical position. The link chain 37 suspended from the arm 41 is being pulled up, for example, 011
5. Hold the lamina 5 in an adjusted tilted position of 30° or other tilt angle. This holding takes place until the link chain is lowered into a stack of sheets 5 which are lifted from bottom to top.

During the lowering of the lamella 5, the shaft 9 is rotated counterclockwise by rotating the manual lever or by the drive motor. A spring 45, which rests tightly on a brake cylinder 43 which is connected in a relatively rotationally fixed manner to the shaft 9, acts on the segment 40 and presses the rocker arm 39 against the step until the edge C, B or A abuts the retaining finger 59. A disk 53 rotates with the segment.

The position of the stepped disc 53 in FIG.
resulting in an angle of inclination of When the finger 59 is adjusted by the sliding device 61 to engage the edge B, the angle of inclination is approximately 50 degrees (see FIG. 6), and when engaged with the edge C, the angle of inclination is approximately 7 degrees.
The inclination angle is 0 degrees (see Figure 7).

As soon as the lowermost lamella 5 approaches the lowermost position, the lever 57 is swung by the control cam 19. This oscillating movement transmitted from the polygonal shaft 55 to the retaining finger 59 causes the retaining finger to be moved out of contact with the stepped disc 53. Thereby, the stepped disc is
It moves further counterclockwise until its edge contacts stopper 65. In this position, the arm 41 of the rocker arm 39 is in a substantially vertical position and the lateral lever 3
The lamina 5, which is connected to the link chain 37 by 8, is in the vertical closed position.

In order to compensate for errors in the overall device that prevent the upper and lower laminae from coming close to each other in the closed position, the stop 65 is finely adjusted by turning the rotary knob 69 until the edges of the laminae 5 overlap each other. Can be done.

Due to the spring 13 provided between the drive wheel 11 and the shaft 9,
After the end of the downward movement of the lamella 5, the shaft 9 can be rotated further, for example by less than 100 degrees, without damaging the device.

This allows actuation by a simple limit switch for the motor drive. In this case, the limit switch does not need to be adjusted very precisely. Furthermore, by additionally rotating the shaft 9 after the lamina 5 has been completely lowered, the lifting of the lowermost lamina 5 is started at the time of release, i.e. when rotating the shaft 9 for lifting the lamella 5. Before this, the lamina is first swung into the position shown in FIG.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal section of a lateral guide with stepped discs;
FIG. 2 is a cross-sectional view taken along the line ■--■ in FIG. 1, in which case the cross-section of the rear region extends along the line n'-n'. Figure 3 is a cross-sectional view taken along the line ■-■ in Figure 1;
The figure is a schematic view of the device when the blind is pulled up, FIGS. 5 to 7 are schematic views showing different inclination angles when the blind is lowered, and FIG. 8 is a view showing the blind when it is closed. DESCRIPTION OF SYMBOLS 1... Side guide, 5... Thin plate, 7... Lifting blind, 9... Shaft, 15... Tension mechanism, 37... Link chain, 39... Rocker arm, 53... ...disc, 59...
Holding finger agent Patent attorney Hikaru Esaki Yoshi agent Patent attorney Sen Fumi Esaki

Claims (1)

[Claims] 1. The inclination angle of the thin plate (5) is constant during the lowering of the elevating blind, and the tension mechanism ( 15) and
Thin plate lift with a horizontally arranged drive shaft (9) and a pair of link chains (39) provided in the lateral guides (1) for swinging the thin plate (5) In the blind, a disc (53) attached to the shaft (9)
However, a plurality of stoppers (A,
B, C), characterized in that the stopper can come into contact with an adjustable holding finger (59). 2. characterized in that the retaining finger (59) can be swung out of the range of the disk (53) by means of the control cam (19) of the tensioning mechanism (15) when the lamella (5) is completely lowered; The thin plate type elevating blind according to claim 1. 3. Claim 1 or claim 3, characterized in that the stops (A to C) consist of steps formed on the outer periphery of the disk (53) and extending substantially in the radial direction between segments with different radii. The thin plate type elevating blind according to item 2. 4. Claim characterized in that the holding finger (59) is fixed to a polygonal shaft (55), on which a swinging arm (57) is attached at a distance from the tensioning mechanism (15). 4. The thin plate type lifting/lowering blind according to claim 2 or claim 3. 5. The holding finger (59) is a sliding and locking device (61)
is slidable in the axial direction on the polygonal shaft (55), and by the sliding and locking device, the stoppers (A to C)
5. The thin plate type elevating blind according to any one of claims 2 to 4, characterized in that it can be locked at a predetermined position within a swing range of. 6. The disk (53) is provided with another step (E),
characterized in that this step abuts an adjustable stop (69), which determines the swing angle of the rocker arm (39) when lifting the thin plate (5);
A thin plate type lifting/lowering blind according to any one of claims 1 to 5. 7. A stepped portion (D) is formed on the disk (53), and this stepped portion is used as the stopper (6) after the holding finger (59) swings.
7. A thin-plate lifting blind according to claim 2, characterized in that the stop determines the angle of inclination of the closed thin plate (5). 8. Thin-plate lift blind according to claim 7, characterized in that the stop (65) is adjustable in order to compensate for errors in the lifting mechanism and/or the thin plate (5). 9. Any one of claims 1 to 8, characterized in that the disc (53) is swingable on the brake cylinder (43) by means of a segment (40) attached to the rocker arm (39). One of the thin plate type lifting and lowering blinds mentioned.