JPH0329519Y2 - - Google Patents

Description

[Detailed description of the invention] [Purpose of the invention] "Industrial application field" In this invention, a plurality of slats are guided through grooves in the longitudinal direction of the vertical frame on both sides of the opening and expand and contract to open and close the opening. The present invention relates to a lifting/lowering opening/closing device for a blind which is capable of tilting the slats.

``Prior Art'' Conventionally, this type of blind has a lifting device that holds the slats guided by vertical frames on both sides of the opening in parallel, raises and lowers the slats, and bundles the slats together when the slats are raised, and a rotating angle of each slat. It has an opening/closing angle holding device that controls and holds the
A lifting device that raises and lowers the slats is driven by a chain that engages with a sprocket wheel fixed to a drive shaft provided in the upper frame of the opening frame, and the movement is opened and closed by a motion transmission means connected to the drive shaft. Some devices are designed to drive the angle holding device, and the drive shaft is rotated in one direction to operate the lifting device, and then the drive shaft is reversed to drive the opening/closing angle holding device. .

The invention described in Swiss Patent No. 565935, which is an example of a lifting/lowering opening/closing device for this kind of blind, raises and lowers the slats via a lifting device using a chain that engages with a sprocket wheel fixed to a drive shaft.
Make it descend. At the beginning of the upward movement of the slats or at the end of their downward movement, a release plate provided on the chain fixes the swinging wheel pivotally connected to the drive shaft through a friction clutch that constantly engages with a clutch box fixed to the drive shaft. When the locking means fixed to the part is released and the swinging wheel is released from the fixed part, the swinging wheel rotates integrally with the clutch box (that is, integrally with the sprocket wheel), and the swinging wheel rotates integrally with the clutch box (i.e., integrally with the sprocket wheel). The opening and closing angle of the slat is set by rotating the slat about its center via two tension members fixed to the slat.

"Problems to be Solved by the Invention" In the above-mentioned prior art invention, the friction clutch of the rocking wheel is such that the sliding surface between the clutch box and the rocking wheel slides under pressure, except when it is released by the release plate. Therefore, the power to drive the drive shaft causes power loss due to sliding resistance, and the mutual sliding surfaces wear out. Further, if the use of the device is interrupted, the sliding surfaces will rust during the interruption of use. In such a blind that doubles as a storm door, if the blind is not used for a long period of time, the sliding surface of the friction clutch is likely to become stuck due to rust, and there is a great possibility that the blind will not be able to operate after a long period of rest. On the other hand, if the resistance of the linkage that tilts the slat increases due to rust or the like, there is a risk that the friction clutch will slip and the slat will no longer be able to tilt.

The object of the present invention is to solve the above-mentioned problems and provide a blind lifting/lowering opening/closing device that does not have sliding parts that wear out.

[Structure of the idea]

``Means for Solving the Problems'' The present invention provides that each slat 6...6 for opening and closing the opening formed by the frame 1 has its both ends connected to the grooves 5 and 5 of the vertical frames 4 and 4, respectively. The shaft rod 13...1 of each connecting lever 10...10, 10' fitted therein.
3 and 13', and each of the connecting levers 10...10, 10' is connected to each other at both ends by a link 28 having a bending pivot portion 29, and the connecting lever located at the lowest end 10'
is a moving body 15 whose shaft 13' is located within a vertical frame,
The movable bodies 15, 15 are supported by bearings 21, 21 fixed to the upper frame 2, and the movable bodies 15, 15 are attached to sprockets 37, 37 fixed to the main shaft 30 located in the upper frame 2, and to the lower ends of the vertical frames 4, 4. Sprocket 38,
As the chains 39, 39 are disposed in mesh with each other, the vertical frames 4, 4 are moved.
The main shaft 3 is connected to both ends of the connecting levers 10, 10, which are connected so as to be movable in a downward direction and located at the uppermost end.
Tensile members 35, 35, 36, 36 provided in the opening/closing angle holding device A, which is configured at each end of the main shaft 30 and rotates and holds each slat 6...6 at a certain angle at the beginning and end of rotation of the main shaft 30. In the blind lifting/closing device, the ends of the main shaft 30 are connected to each other, and each slat 6...6 fixed to the shaft rod is rotated by a certain angle to close the opening. An opening/closing angle holding device A configured in each section supports the rotation of the main shaft 30 and supports the sprocket 3 fixed to the main shaft 30.
Bearings 31, 32, 3 arranged with 7, 37 in between
1, 32, discs 33, 34, 33, 34 fixed oppositely to the bearings 31, 32, respectively, and a stopper 41 disposed between the discs 33, 34 and fixed to the discs 33, 34. , 41, and the disc 3 is rotatably fitted to the outer peripheral surface of the main shaft 30 and
sleeves 42, 42 fixed to the main shaft 30; , recesses 45, 45 that communicate with the holes 44, 44 of the sleeves 42, 42 in the rotation ready position of the slats 6...6; The cam pins 46, 46 are disposed so as to be able to be fitted into and separated from the recesses 45, 45, and have rollers 47, 47 attached to the other end; the rollers 47 attached to the cam pins;
Circumferential hole 5 into which the rollers 47, 47 of No. 6 fit and move.
3, a fixed cam plate 52, 52 having a cam hole 54 connected to the circumferential hole 53, a spring 56, and the spring 5.
A fixed notch device having a notch pressed against the slats 6...6, and a notch device fixedly attached to the disc so as to engage the notch and prevent the rotation of the slats 6...6 after the slats 6...6 have rotated by a certain angle. 34, one end is fixed to the plate surface of the disc 33 facing oppositely across the center of the disc, and the other end is connected to the end of the uppermost connecting lever 10, 10. Tension members 35, 36, 35, 36 fixed to the sections, and each slat 6...
6, the rollers 47, 47 of the cam pins 46, 46 contact the stopper 41 to rotate the slats 6...6 by a certain angle toward the closing side.
and a protrusion 4 provided on the chains 39, 39 that disengages the cam holes 54 of the cam plates 52, 52.
0, 40, the main shaft 30 is connected to a drive shaft 59 through a coupling means, and the drive shaft 9 is connected to an electric operating shaft 87 linked to a motor M via a clutch means, and a manual shaft 87 linked to a hand-held operating section. This is a blind lifting/lowering opening/closing device that is switchably connected to an operating shaft 90.

"Operation" When the main shaft 30 is rotated in the direction of opening the blind with the opening of the blind closed, the sleeve 42 rotates together through the cam pin 46, and the discs 33 and 34 rotate together with the sleeve 42. 36 is being pulled.

In this way, when tension is applied to one of the tendons 36, 36 by rotation of the main shaft 30, the uppermost connecting levers 10, 10 rotate by a certain angle around the shaft rods 13, 13, and the connecting levers 10, 1
The connecting levers connected to each other by links 28 rotate by a certain angle around the shaft rod, thereby rotating the slats 6 . . . 6 fixed to the shaft rod by a certain angle.

During this rotation of the slats 6...6, the roller 4
7 moves from the circumferential hole 53 to the cam hole 54, and the cam pin 46 escapes from the recess of the main shaft 30. A notch is inserted into the locking portion of the disc 34, and the discs 33 and 34 are stopped from rotating. Then, only the main shaft 30 rotates, and the protrusion 40 of the chain is separated from the stopper. Continued spindle 3
Due to the upward movement of the movable bodies 15, 15 due to the rotation of 0, the lowermost connecting levers 10', 10' move upward, and each connecting lever rises while folding the bending pivot portion 29 of the link 28 inward. to open the opening.

On the other hand, due to the reverse rotation of the main shaft 30, the movable bodies 15,1
5 moves downward, and the lowermost connecting levers 10', 10' also move downward, and the connecting lever 1
As the links 0' and 10' move, each connecting lever descends while stretching the folded link 28, and after descending, the protrusion 40 of the chain contacts the stopper 41, pushes the stopper 41, and releases the disc 3.
3 and 34, the other tension member 35 is pulled, and the slats 6 . disk 33,
34 rotates, the sleeve 42 and the cam pin 46
rotate together, the roller 47 moves from the cam hole 54 to the circumferential hole 53, the cam pin 46 fits into the recess 45 of the main shaft 30, and the main shaft 30 and the discs 33, 34 rotate together. The notch is released from the locking portion of the disc 34.

"Embodiments" Hereinafter, the present invention will be described in detail with reference to the accompanying drawings showing embodiments thereof.

1 and 2 show the lifting/lowering opening/closing device for a blind according to an embodiment of the present invention, and FIG. 3 shows a slat;
The figure is a side sectional view, FIG. 2 is a front sectional view, and FIG. 3 is a side view.

1 is a frame body, and the frame body 1 is formed from an upper frame 2, a lower frame 3, and vertical frames 4, 4.

The vertical frames 4, 4 are hollow bodies having a substantially rectangular cross section, and the opposing surfaces of the vertical frames 4, 4 are divided by slits extending in the longitudinal direction, and the respective dividing surfaces are arranged on the inside. Grooves 5, 5 formed by bending are provided.

Reference numeral 6 denotes a slat (vane plate) that opens and closes the opening formed in the frame 1, and the slat 6 has a horizontal surface portion 7 and a curved surface continuous with the horizontal surface portion 7 on one side of the horizontal surface portion 7. The other side of the surface portion 8 and the horizontal surface portion 7 is provided with a bent surface portion 9 that is continuous with the horizontal surface portion 7 . The slat 6 is assembled so that the end of the curved surface 8 overlaps the end of the curved surface 9 of the adjacent slat 6 in the closed state.

Reference numeral 10 denotes a connecting lever, and the connecting lever 10 has a protruding rod 11 at one end that protrudes in a direction perpendicular to the plate surface of the lever, and a protruding rod 11 at the other end that protrudes in the same direction as the protruding rod 11 and. An engaging rod 12 shorter than the protruding rod and a shaft rod 13 are provided at the center of the plate surface on the opposite side of the protruding rod 11.

The ends of the horizontal surface portions 7 of the slats 6 are respectively fixed to the ends of the shaft 13 of the connecting lever 10, and the shaft 13 of the connecting lever 10 is positioned within the groove 5 of the vertical frame 4.

Reference numeral 14 denotes a bearing fitted to the outer peripheral surface of the shaft rod 13 of the connecting lever 10 except for the connecting lever 10' located at the lowest end. 5 so as to be movable upward and downward along the groove.

FIG. 4, which is a front view, FIG. 5, which is a side view, and FIG. 6, which is a plan sectional view, show details of the lower part of the device.

Reference numeral 15 denotes a moving body, and the moving body 15 includes a roller support part 17 that rotatably supports rollers 16, 16 at a predetermined interval, and the roller support part 17.
It is formed from a mounting portion 18 projecting from one side of the.

19 is a pin fixed to the mounting portion 18 of the movable body 15.

Reference numeral 20 denotes a hook portion formed on the mounting portion 18 of the movable body 15, and the hook portion 20 is adjacent to the pin 19.

21 is fixed to the plate surface of the mounting portion 18 of the movable body 15, and is the shaft rod 1 of the connecting lever 10' located at the lowest end.
3'.

The bearing 21 includes a rectangular base portion 22 and the base portion 2.
A rectangular protrusion 23 integrally formed on the upper surface of 2
In addition, recesses 24 are provided on both front and rear sides of the base portion 22, and the protrusion 23
A through hole 2 is provided in the direction perpendicular to the recesses 24, 24.
5 is provided, and the through hole 25 is connected to one of the recesses 24
An opening 26 is provided on the side.

The bearing 21 is fitted into the through hole 25 of the protrusion 23 through the opening 26 of the connecting lever 1.
0' is supported, and the concave portion 2 of the base portion 22 is
4 and 24 are fitted into the grooves 5 of the vertical frame 4 and are disposed so as to be movable in the upward and downward directions of the vertical frame 4.

Reference numeral 27 denotes a torsion spring fitted into the outer peripheral surface of the pin 19 provided on the movable body mounting portion 18. One end of the torsion spring 27 engages with the connecting lever 10' located at the lowest end, and the other end engages with the connecting lever 10' located at the lowest end. is engaged with a hook portion 20 formed on the mounting portion 18, and the torsion spring 27
The connecting lever 10' is always biased with a spring force in the counterclockwise direction in FIG.

Reference numeral 28 is a link that connects the protruding rods 11 and the engaging rods 12 of each connecting lever 10 including the connecting lever 10' located at the lowest end, and the link 28 is provided with a bending pivot portion 29. Each connection lever 10 is connected by a toggle mechanism.

As shown in the upper part of FIG. 2, FIG. 7 (top view), and FIG. 8 (front sectional view), 30 is the frame 1
This is the main shaft placed within the upper frame 2 of the .

31 and 32 are bearings arranged at the ends of the main shaft 30 and supported by the main shaft 30.

Numerals 33 and 34 are discs fixed to the outer peripheral surfaces of the bearings 31 and 32 so as to face each other.

Reference numerals 35 and 36 denote tension members having one end fixed to the plate surface of the one disc 33 facing each other across the center of the disc 33, and the other end of the one tension member 35 is located at the top. The other end of the other tension member 36 is similarly fixed to the engaging rod 12 of the connecting lever 10.

A sprocket 37 is fixed to the main shaft 30 between the bearings 31 and 32.

A sprocket 38 is pivotally mounted at the lower end of the vertical frame 4 so as to face the sprocket 37.

39 is a chain stretched between the sprockets 37 and 38, one end of the chain 39 meshes with one sprocket 37 and is fixed to the upper end of the movable body 15, and the other end is connected to the other sprocket 38.
It is fixed to the lower end of the movable body 15 by meshing with the movable body 15.

9 and 10 are side views showing the relationship between the disc 33 and the chain 39. FIG.

40 is a protrusion provided on the link of one piece of the chain 39, and the protrusion 40 is attached to each slat 6.
When it descends, it abuts against a stopper 41 fixed between the discs 33 and 34.

41 is arranged between the disks 33 and 34, and the disk 33,
34, and when each slat 6 is lowered, the protrusion 40 of the chain 39 is stopped.
contacts the stopper 41, and the stopper 41 causes each slat 6 to rotate (close).
It plays the role of fitting the cam pin into the main shaft recess, which will be described later.

Reference numeral 42 shown in FIG. 2 is a sleeve having a flange 43 loosely fitted to the outer peripheral surface of the main shaft 30, and the sleeve 42 is fixed to the disc 34 at the flange 43.

Reference numeral 44 denotes a hole provided in communication with the inner hole of the sleeve 42 from the outer circumferential surface of the sleeve 42 .

Reference numeral 45 denotes a recess provided in the outer peripheral surface of the main shaft 30 surrounded by the sleeve 42 and at a position that coincides with the hole 44 of the sleeve 42 when each slat 6 is in the lowered position (rotation preparation position).

Reference numeral 46 denotes a cam pin that slides into the hole 44 of the sleeve 42 and has one end arranged so that it can be inserted into and extracted from the recess 45 of the main shaft 30. A cam pin 46 is fixed to the other end of the cam pin 46 in parallel with the main shaft 30. A roller 47 is rotatably attached to the shaft.

Reference numerals 48 and 49 denote bearings that slidably support the main shaft 0, and the bearings 48 and 49 are fixedly supported by brackets 50 and 51 fixed to the upper frame 2, respectively.

Reference numeral 52 denotes a cam plate fixed to one of the brackets, in other words, the bracket 50 located on the sleeve 42 side.
As shown in FIG. 0, the circumferential hole 53 centered on the axis of the main shaft 30 and the cam hole 54 connected to one end of the circumferential hole 53 form a central angle of approximately 90 degrees with the main shaft 30 as the center. are established over a range of The circumferential hole 53 is a circular arc centered on the main shaft 30, and the cam hole 54 is a cam groove whose center is the main shaft 30 and has a radius that gradually increases from the radius of the circumferential hole 53. It ends with a short arcuate groove centered at 30.

A roller 47 attached to the cam pin 46 is disposed in the circumferential hole 53 of the cam plate 52 .
are engaged to be movable along.

55 is fixed to the brackets 50, 51,
It is a cylindrical body with one end protruding close to the disk 34 side.

56 is a coil spring disposed within the cylindrical body 55.

57 is fitted to the protruding end of the cylindrical body 55,
A steel ball 57 is pressed by a coil spring 56 disposed inside the cylinder 55, and the steel ball 57 is always in contact with the surface of the disk 34. That is, the steel ball 57 is a notch.

Reference numeral 58 denotes a recess provided in the plate surface of the disc 34 on the cylinder 55 side, and the steel ball 57 fits into the recess 58 to prevent the disc 34 from rotating. The recessed portion 58 is an engaging portion into which a steel ball 57 serving as a notch engages.

That is, in the initial stage when each slat 6 in the closed state is raised to open the opening, the disks 33,
34 rotates to rotate each slat 6 to an angle of approximately 90 degrees, a steel ball 57 fits into a recess 58 of the disc 34 to prevent further rotation of each slat 6. The cylindrical body 55, coil spring 56, steel ball 57, and recess 58 also form a notch device.

Bearings 31 and 32 that support discs 33 and 34 against the main shaft 30 mentioned above, discs 33 and 34 fixed to the outer peripheral surfaces of the bearings facing each other, and a stopper 41 fixed between the discs. a sleeve 42 disposed loosely on the outer peripheral surface of the main shaft and fixed to the disk 34; a hole 44 provided so as to communicate from the outer peripheral surface of the sleeve to the inner hole of the sleeve; and an outer periphery of the main shaft. A recess 45 is provided on the surface and coincides with the hole 44 when the slat 6 is in the rotation ready position, and one end is slid into the hole 44 of the sleeve, and the other end is arranged so that it can be inserted into and extracted from the recess 45 of the main shaft. A cam pin 46 having a roller 47 attached to the other end thereof, and a circumferential hole 53 fixed to a bearing bracket 50 supporting the main shaft, into which the roller 47 of the cam pin is fitted and moved as the main shaft rotates. A cam plate 52 having a cam hole 54 connected to the circumferential hole 53 and a bracket 5
After the slat 6 and the cylindrical body 55, which is fixed at 0.51 and contains a coil spring 56 and a steel ball 57 pressed by the coil spring 56, rotate at a certain angle, the slat 6 engages with the steel ball 57. A recess 58 provided on the plate surface of the disc 34 to prevent rotation of the slat 6 and one end thereof are fixed to the plate surface of the disc 33 facing each other across the center of the disc, and the other end is fixed to the top end. After the tension members 35 and 36 fixed to both ends of the connecting lever and each slat 6 are lowered, the slats 6 contact the stopper 41 to rotate the slat 6 by a certain angle toward the closing side, and the roller 47 of the cam pin 46 Cam plate 52
The opening/closing angle holding device A of the slat 6 is constituted by a protrusion 40 provided on the chain 39 which is disengaged from the cam hole 54 of the slat 6.

59 is a drive shaft connected to the main shaft 30 via a shaft joint 60, as shown in FIG. 8, and as shown in FIG. 14, which is a front view, and FIG. A cylindrical shaft portion 63, 63 having a plurality of protrusions 61 having a semicircular cross section along the axial direction on the outer circumferential surface thereof and shoulder portions 62, 62 on both sides sandwiching the protrusions 61 and having a reduced diameter. Hexagonal shaft portions 64, 64 are provided at the ends of the cylindrical shaft portions 63, 63.

The drive shaft 59 connects the left and right main shafts 30 via the shaft joints 60 at the hexagonal shaft portions 64, 64, and is supported by a bracket 95 fixed to the upper frame 2 via a bearing 96.

As shown in FIG. 16, which is a front view of the parts, and FIG. 17, which is a sectional view taken along line A-A in FIG.
The inner circumferential surface of the clutch 65 has an engaging surface portion 68 having a concave portion 67 that engages with the protruding portion 61 of the drive shaft 59.
A cylindrical surface portion 70 having a stepped portion 69 and an enlarged diameter is provided at one end of the engaging surface portion 68, and engaging pawls 71 are provided on both end surfaces of the clutch 65, respectively.
72 is formed. The clutch 65 is the seventh
As shown on the right side of FIG. 8, it is disposed so as to be movable in the axial direction along the protrusion 61 of the drive shaft 59.

73 and 74 are cylindrical shaft portions 63 and 6 of the drive shaft 59;
This is a clutch gear that is slid into flanged bushes 75 and 76 that are press-fitted into the clutch gear.

The clutch gears 73 and 74 have teeth 7 on their outer peripheral surfaces.
7, 78 and an inner hole 7 on one end surface.
9, 80 and step portions 81, 82 to expand the diameter of the cylindrical protrusions 83, 84, and the cylindrical protrusions 8
3 and 84 are provided with engaging claws 8 as shown in FIG.
5,86 are formed.

The clutch gears 73 and 74 each have an engaging pawl 8.
5 and 86 are opposed to each other, and the step portions 81 and 82 are engaged with the flanges of the bushes 75 and 76 to prevent them from moving in the axial direction with respect to the drive shaft 59. It is arranged so that it can be engaged and disengaged.

Reference numeral 87 denotes an electric operating shaft connected to a motor shaft 88 of the motor M via a joint, and the electric operating shaft 87 is connected to brackets 95, 95 fixed to the upper frame 2.
is supported via bearings 97, 97.

89 is a gear formed on the electric operating shaft 87, and the gear 89 meshes with the teeth 78 of one of the clutch gears 74 disposed on the drive shaft 59.

Reference numeral 90 denotes a manual operation shaft, and the manual operation shaft 90 is supported by brackets 95, 95 fixed to the upper frame 2 via bearings not shown in the drawings.

Reference numeral 91 denotes a gear fixed to the manual operation shaft 90, and the gear 91 meshes with the gear portion 77 of the other clutch gear 73 disposed on the drive shaft 59.

Reference numeral 92 denotes a clutch 65 disposed along the protrusion 61 of the drive shaft 59 and a cylindrical shaft portion 6 of the drive shaft 59.
The coil spring 92 is a coil spring disposed between one clutch gear 74 disposed at the clutch 65, and the coil spring 92 has one end engaged with the stepped portion 69 of the clutch 65 and the other end engaged with the stepped portion 82 of the clutch gear 74. combined button 76
The clutch 65 is in contact with the end face of the flange,
is urged toward the other clutch gear 73.

The lower end of the clutch 93 is pivotally connected to the upper frame 2, and the clutch 6
5 A roller 98 that is arranged around the outer peripheral surface and is rotatably attached to the flange 6 of the clutch 65
The electric/manual switching plate 93 is configured to roll on six end faces, and the switching plate 93 is formed to be tiltable at the lower end.

94 is a pushbutton whose one end is fixed to the tip of the switching plate 93 and the other end is held on the hand operation unit side;
With a pull cable, when the cable 94 is pulled, the switching plate 93 tilts and presses the flange portion 66 of the clutch 65 via the roller 98, and the coil spring inserted between the clutch 65 and the bush 76 is activated. 92, the clutch 65 meshes with the clutch gear 74, and the rotation of the drive shaft 59 is transmitted from the electrically operated shaft 87 to which the gear 89, which meshes with the clutch gear 74 rotated by the drive of the motor M, is fixed. This converts it to a so-called electric type. on the other hand,
By pushing the cable 94, the clutch 65 is moved toward the clutch gear 73 by the spring force of the coil spring 92 and meshed with the clutch gear 73, and the drive shaft 59 is rotated by manual operation of the hand control unit. A gear 91 that meshes with the gear 73 is transmitted from a fixed manual operation shaft 90. This is a so-called manual conversion method.

Next, the operation of the blind opening/closing elevating device constructed as described above will be explained.

<Opening operation by rotating and raising the slat> When the connecting lever 10 to which the slat 6 shown in FIGS. 1 and 2 is fixed is lowered and the slat 6 closes the opening, the hand control panel (not shown) ), the motor M is driven and rotational force is applied to the electric operation shaft 87 connected to the motor shaft 88. As the electric operating shaft 87 rotates, rotational force is applied to the clutch gear 74 that meshes with a gear 89 fixed to the electric operating shaft 87, the clutch 65 that meshes with the clutch gear 74, and the clutch 65.
The main shaft 30, which is connected to the drive shaft 59 via a joint 60, is rotated.

At this time, the clutch 65 is pressed against the switching plate 93 by a pull operation of a push-pull cable 94 fixed to the electric/manual switching plate 93, and is always meshed with the clutch gear 74.

Due to the rotation of the main shaft 30, the recess 45 of the main shaft 30
As the main shaft 30 rotates, the cam pin 46, one end of which is fitted into the
is rotated while moving along the circumferential hole 53 of the cam plate 52.

When the cam pin 46 rotates together with the main shaft 30, the sleeve 42 through which the cam pin 46 is inserted and the discs 33, 34 fixed to the sleeve 42 also rotate.

By the rotation of the discs 33 and 34 (in the direction of the arrow in FIG. 9 (counterclockwise direction)), tension is applied to one of the tension members 36 fixed to the plate surface of the disc 33, and the tension member 36 is Connected topmost connecting lever 10
rotates around the shaft 13 of the connecting lever 10, and at the same time each connecting lever 10, 10' connected to the connecting lever 10 by a link 28 also rotates around the shaft 13, respectively.
13', and rotates each slat 6 fixed to the shaft rods 13, 13'.

In this way, the overlap of the slats 6 is eliminated, and a state of sunshading and daylighting is achieved.

When the roller 47 attached to the cam pin 46 moves from the circumferential hole 53 of the cam plate 52 to the cam hole 54 due to the rotation of the main shaft 30, the cam pin 46
is extracted from the recess 45 of the main shaft 30, and transmission of the rotational force of the main shaft 30 to the discs 33 and 34 is interrupted.

At this point, the rotation of each connecting lever 10, 10' is stopped, and each slat 6 is inserted into the circumferential hole of the cam plate 52.
3 and the angle corresponding to the central angle drawn by the roller 47 that moved between both ends of the cam hole 54 (approximately 90 degrees)
At the same time, a steel ball 57 fits into a recess 58 provided in the plate surface of the disc 34 to prevent rotation of the disc 34 and maintain the opening angle of each slat 6.

During this time, the protrusion 40 of the chain 39 moves in contact with the stopper 41, and the stopper 41 stops near the left side of the cam hole 54 (FIG. 10).

During and after the above state, the main shaft 3
0 rotates, a chain 39 stretched between a sprocket 37 fixed to the main shaft 30 and a sprocket 38 attached to the lower end of the vertical frame 4 is operated, and the movement attached to the chain 39 is activated. The body 15 moves upward while being guided by the inner wall surface of the vertical frame 4 via rollers 16, 16 attached to the roller support part 17.

Due to the upward movement of the moving body 15, the moving body 15
The connecting lever 10' located at the lowest end supported by a bearing 21 fixed to the mounting part 18 of the connecting lever 10' is connected along the groove 5 of the vertical frame 4 in which the bearing 21 is fitted together with the bearing 21 between the connecting levers 10' and 10. Link 2 placed in
8 is moved upward as shown by the arrow in FIG. 11 while folding the bending pivot portion 29 of No. 8 inward, and the respective connecting levers 10 are similarly operated in sequence to open the opening.

<Closing operation by lowering and rotating the slat> In the above-mentioned open state, by pressing the close button on the hand control panel (not shown), the motor M
is driven, and reverse rotational force is applied to the electric operation shaft 87 connected to the motor shaft 88, causing the main shaft 30 to reversely rotate through the same transmission path as in the opening operation described above.

By the reverse rotation of the main shaft 30, a chain 39 stretched between a sprocket 37 fixed to the main shaft 30 and a sprocket 38 attached to the lower end of the vertical frame 4 is operated, and the movement attached to the chain 39 is activated. The body 15 moves downward along the vertical frame 4.

Due to the downward movement of the moving body 15, the moving body 15
The connecting lever 10' located at the lowermost end supported by a bearing 21 fixed to the mounting part 18 of the connecting lever 10' is folded together with the bearing 21 between the connecting levers along the groove 5 of the vertical frame 4 in which the bearing 21 is fitted. Starting with link 28 at the top, each link is successively stretched out and moved downward as shown by the arrow in FIG.

A protrusion 40 provided on the chain 39 is located at a position slightly before the end of the movement of the lowest connecting lever 10'.
is the stopper 41 fixed between the discs 33 and 34.
(FIG. 10) and rotates the disks 33, 34. At this point, the steel ball 57 that had been fitted into the recess 58 of the disc 34 is disengaged from the recess 58 .

As shown in FIG.
1, the hole 44 of the sleeve 42 and the recess 45 of the main shaft 30 match, and the discs 33, 3
4 and the main shaft 30 are a stopper 41 and a chain 39.
and rotate as one unit via sprocket 37,
Start pulling up the tension material 35. The sleeve 42 fixed to the disk 34 also rotates, and the hole 4 of the sleeve 42 is rotated.
The cam pin 46 fitted into the sleeve 4 rotates together with the sleeve 42 to move the roller 47 attached to the end of the cam pin 46 from the cam hole 54 of the cam plate 52 to the circumferential hole 53.

By moving the roller 47 to the circumferential hole 53,
The cam pin 46 is located in a recess 45 provided in the main shaft 30.
to be inserted into.

Further, in this state, the main shaft 30 and the disk 33 rotate together, and tension is applied to one of the tension members 35 fixed to the disk 33, causing the connection lever 10 connected to the tension member 35 to be pulled from its shaft rod. 13, a roller 47 attached to a cam pin 46
rotates until it moves to the right end of the circumferential hole 53 of the cam plate 52 (FIG. 9), and each slat 6 fixed to the connecting lever 10 rotates in the same way, so that each slat 6 assumes a vertical position and reaches its maximum position. The lower slat 6 assumes the lowest position of the opening and closes it.

[Effect of idea]

In this invention, a disc connected by a stopper and a sleeve fixed to the disc are rotatably fitted to the main shaft, and one end of the cam pin that has slipped into the sleeve can be engaged and disengaged from the recess of the main shaft, and the other end of the cam pin is connected to the cam follower. The cam follower engages with a fixed cam to control the movement of the cam pin, and a means for locking the disc at a predetermined position is provided, and a protrusion provided on the chain of the slat lifting device secures the disc to the disc when the blind is opened. The disc is rotated through the stopper, and the end of the tilting medium between the slat and the slat is attached to the disc to form a device for holding the opening/closing angle of the slat. It is separated from the rotational force transmitted from the drive shaft (main shaft), and the slat opening/closing angle holding device and the lifting device are not engaged due to a sliding part like a friction clutch that is always in action like in the conventional example. (1) Less power is required.

(2) There is no risk of inoperability due to rust or other changes in frictional force.

(3) Durable as there is no friction clutch.

(4) Since the main shaft can be driven manually or electrically, it can be opened even during a power outage, which is useful in emergencies.

[Brief explanation of drawings]

1 and 2 show the lifting/lowering opening/closing device for a blind according to an embodiment of the present invention, and FIG. 3 shows a slat;
The figure is a side sectional view, FIG. 2 is a front sectional view, FIG. 3 is a side view, FIGS. 4, 5, and 6 are detailed views of the lower part of the device, and FIG. The figure is a side view,
Fig. 6 is a plan view, Figs. 7 and 8 show the upper part of the device, Fig. 7 is a plan view, Fig. 8 is a front sectional view, and Fig. 9 is a front sectional view.
10 are front views showing the relationship between the disc, chain, and cam plate, and FIGS. 11, 12, and 13 are front views showing the states of the bending pivot, link, and connecting lever, respectively. Figures 14 and 15 show the drive shaft, Figure 14 is a front view, Figure 15 is a side view, and Figure 15 is a front view.
6 and 17 show the clutch, FIG. 16 is a front view, and FIG. 17 is a sectional view taken along line AA in FIG. 16. 1... Frame body, 2... Upper frame, 3... Lower frame, 4...
Vertical frame, 5...Groove, 6...Slat, 7...Horizontal surface part, 8...Curved surface part, 9...Bent surface part, 10, 1
0'...Connection lever, 11, 11'...Protruding rod, 1
2, 12'...Engagement rod, 13, 13'...Shaft rod, 1
4... Bearing, 15... Moving body, 16... Roller, 17... Roller support part, 18... Mounting part,
19...Pin, 20...Hook part, 21...Bearing, 22...Base part, 23...Protrusion part, 24...
Recessed portion, 25... Through hole, 26... Opening, 27...
...Torsion spring, 28...Link, 29...Bending pivot, 30...Main shaft, 31, 32...Bearing, 33,
34... Disk, 35, 36... Tensile material, 37, 3
8... Sprocket, 39... Chain, 40...
...protrusion, 41 ... stopper, 42 ... sleeve, 43 ... flange, 44 ... hole, 45 ... recess,
46...Cam pin, 47...Roller, 48,4
9... Bearing, 50, 51... Bracket, 52...
...Cam plate, 53...Circumferential hole, 54...Cam hole, 5
5... Cylindrical body, 56... Coil spring, 57... Steel ball, 58... Recess, 59... Drive shaft, 60... Shaft joint, 61... Projection, 62... Shoulder, 63... …
Cylindrical shaft portion, 64... Hexagonal shaft portion, 65... Clutch, 66... Flange portion, 67... Concave portion, 68
...Engagement surface portion, 69...Step portion, 70...Cylindrical surface portion, 71, 72...Engagement pawl, 73, 74...Clutch gear, 75, 76...Flanged bush, 77,
78...Tooth portion, 79, 80...Inner hole, 81, 82
...Stepped portion, 83, 84... Cylindrical protrusion, 85, 8
6...Engagement claw, 87...Electric operation shaft, 88...Motor shaft, 89...Gear, 90...Manual operation shaft,
91...Gear, 92...Coil spring, 93...Switching plate, 94...Cable, 95...Bracket, 96, 97...Bearing, 98...Roller, A...
...Opening/closing angle holding device, M...Motor.

Claims (1)

[Scope of utility model registration request] Each slat 6...6 that opens and closes the opening formed by the frame 1 has its both ends fitted into the grooves 5, 5 of the vertical frames 4, 4, respectively, and each connecting lever 10...10. ,10' shaft 13...13,1
3' and each connecting lever 10
... 10, 10' are connected to each other at both ends by a link 28 having a bending pivot joint 29, and the connecting lever 10' located at the lowest end has its shaft 13' located within the vertical frame. moving bodies 15, 15
It is supported by bearings 21, 21 fixed to
The movable bodies 15, 15 have a main shaft 3 located within the upper frame 2.
Sprockets 37, 37 fixed at 0 and sprockets 38, 3 attached to the lower ends of vertical frames 4, 4.
A connecting lever 10 located at the uppermost end is connected to chains 39, 39 disposed in mesh with the vertical frames 4, 4 so as to be movable upward and downward as the chains move. , 10 have the main shaft 30 at both ends.
tension members 35, 35, 36, and 36 provided in the opening/closing angle holding device A, which is configured at each end of the main shaft 30 and rotates and holds each slat 6...6 at a certain angle at the beginning and end of rotation of the main shaft 30. In the blind lifting/closing device, the ends of the main shaft 30 are connected to each other, and each slat 6...6 fixed to the shaft rod is rotated by a certain angle to close the opening. The opening/closing angle holding devices A each have a sprocket 37, which supports the rotation of the main shaft 30 and is fixed to the main shaft 30.
Bearings 31, 32, 31, 3 arranged with 37 in between
2 and the discs 33, 34, 33, 34 fixed to the bearings 31, 32 facing each other, and the disc 3
stoppers 41, 41 disposed between the disks 33, 34 and fixed to the disks 33, 34;
sleeves 42, 42 fixed to the sleeves 42, 42, holes 44, 44 provided in the sleeves 42, 42 so as to communicate the outer circumferential surfaces of the sleeves with the inner holes of the sleeves, holes 44, 44 provided in the outer circumferential surface of the main shaft 30, . . . 6, the holes 44 of the sleeves 42, 42,
44, and one end thereof is inserted through the holes 44, 44 of the sleeves 42, 42, and is disposed so as to be fitable and detachable into the recesses 45, 45 of the main shaft 30, and a roller 47, The cam pins 46, 46 to which the cam pins 47 are attached, the rollers 47 attached to the cam pins, and the rollers 4 of the cam pins 46, 46
A circumferential hole 53 into which 7 and 47 fit and move, and the circumferential hole 5
A fixed cam plate 5 with cam holes 54 connected to 3.
2, 52, a spring 56, a fixed notch device having a notch pressed by the spring 56, and after the slats 6...6 are rotated by a certain angle, the notches engage with the notches and the slats 6... An engaging portion provided on the plate surface of the disk 34 to prevent rotation of the disk 34 is fixed at one end to the plate surface of the disk 33 so as to face each other across the disk center, and the other end is fixed to the plate surface of the disk 33 so as to face each other across the center of the disk. Tensile members 35, 36, 3 fixed to the ends of the uppermost connecting levers 10, 10, respectively
5, 36, and after each slat 6...6 is lowered, the cam pin 4 is brought into contact with the stopper 41 in order to rotate the slat 6...6 by a certain angle toward the closing side.
6, 46 rollers 47, 47 and cam plates 52, 5
The chain 3 is disengaged from the cam hole 54 of No. 2.
The main shaft 30 is connected to a drive shaft 59 through a coupling means, and the drive shaft 59 is connected to an electric operating shaft 87 linked to a motor M through a clutch means. and a blind lifting/lowering opening/closing device which is switchably connected to a manual operation shaft 90 linked to a hand-operated operation section.