JP4809786B2 - blind - Google Patents

Description

  The present invention relates to a blind for raising and lowering a shielding material such as a horizontal blind, a pleated screen, and a roman shade, and a blind for raising and lowering the shielding material by rotating a drum to which a raising and lowering cord is connected to be wound and unwound. About.

  Conventionally, what was described in patent document 1 is known as this kind of blind. In the blind described in Patent Document 1, an input shaft that rotates forward and backward based on the operation of the operating means, a drive shaft that rotates forward and backward based on the rotation of the input shaft, and a rotation of the drive shaft A winding shaft for raising and lowering the shielding material is provided in the head box, the transmission means for transmitting the rotation of the input shaft in the shielding material lowering direction to the drive shaft at a higher speed than the rotation in the shielding material raising direction, Transmission blocking means for blocking the rotation of the input shaft due to the rotational force acting on the winding shaft based on the weight is provided.

  When the shielding material is lifted, the winding shaft is rotated at the same speed as the input shaft, and when the shielding material is lowered, the winding shaft is rotated at a rotational speed faster than the rotational speed of the input shaft, so that the shielding material is pulled up. In comparison, the descending speed of the shielding material is increased.

JP 2006-28871 A

  However, when the shielding material is lifted, the force acting on the take-up shaft increases due to the weight of the shielding material as the shielding material is raised, so that the conventional apparatus has a problem that the operation load becomes heavy.

  This invention is made | formed in view of this subject, and it aims at providing the blind which can reduce the operation load at the time of shielding material raise.

In order to achieve the above-described object, the invention described in claim 1 includes a shielding material, a lifting / lowering cord having one end connected to the shielding material and capable of raising and lowering the shielding material, and the other end of the lifting / lowering cord being wound and unwound. In a blind comprising: a drum that can be connected, a drive shaft that rotationally drives the drum, and an operation unit that is operated to rotationally drive the drive shaft.
A weight that can swing around the swing center axis and generates a rotational moment due to gravity around the swing center axis, and the operation of the operating unit is converted into a swing motion of the weight, and the rotation generated by the weight A converter that transmits the rotational force due to the moment to the drive shaft, and when the operation unit is operated in the upward direction of the shielding material, the rotational force in the upward direction of the shielding material is generated by the rotational moment generated by the weight. It is transmitted to.

  According to a second aspect of the present invention, the rotational motion of the drive shaft based on the operation of the operation unit according to the first aspect is transmitted to the conversion device, and the conversion device converts the rotational motion into a swinging motion of the weight. It is characterized by that.

  According to a third aspect of the present invention, the drive shaft according to the first or second aspect includes a first drive shaft coupled to the operation portion and a second drive shaft coupled to the drum, and the first drive The conversion device is provided between the shaft and the second drive shaft.

  According to a fourth aspect of the present invention, the weight according to any one of the first to third aspects is provided with a telescopic swing shaft that is supported by the swing center shaft and a weight that is supported by the swing shaft. And a main body, wherein the distance from the central axis of the weight body is variable by extending and contracting the oscillation axis.

  According to a fifth aspect of the present invention, the weight swing range according to any one of the first to fourth aspects of the present invention is such that the swing range of the weight stands vertically above the swing center axis and tilts horizontally from the swing center axis It is characterized in that it is set in a range of 90 degrees between the state and the state.

  According to the present invention, when the shielding material is raised, the rotational force in the shielding material raising direction is transmitted to the drive shaft by the rotational moment generated by the weight, so that the operation load during the shielding material raising operation can be reduced.

  According to the second and third aspects of the present invention, the motion of the drive shaft or the first drive shaft based on the operation of the operation unit is transmitted to the weight and converted to the swinging motion of the weight, and the rotational moment generated by the weight is driven. Can be transmitted to the shaft or the second drive shaft.

  According to the fourth aspect of the present invention, if the distance from the oscillation center axis of the weight body is variable, the rotational moment can be increased by increasing the distance from the oscillation center axis. Accordingly, a large rotational moment can be generated when a large rotational force in the upward direction of the shielding material is required. Further, when a large rotational force is not required, the weight can be stored compactly.

  According to the fifth aspect of the present invention, the rotational moment due to the gravity generated by the weight is zero when standing vertically above the swinging central axis, and the weight is generated when tilting horizontally from the swinging central axis. Since the rotational moment due to gravity can be maximized, the operation load can be reduced in accordance with the required operation load in the range from 0 to the maximum.

  For example, in general, when the rising starts from the state where the shielding material is lowered to the maximum, the required operating load is small at the start, and the necessary operating load increases as the shielding material rises to the maximum. In accordance with the increase, the rotation moment generated can be increased to efficiently use the rotation moment of the weight.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
(First embodiment)
FIG. 1 is a front view showing a blind according to the first embodiment of the present invention. In this embodiment, a horizontal blind is illustrated as a blind, but the present invention is not limited to this, and a blind that lifts and lowers an arbitrary shielding material such as a pleated screen or a roman shade can be used.

  In the figure, the blind 10 has a head box 12 fixed to a window frame, a wall surface or the like by a bracket, and a plurality of slats 16 as shielding materials are vertically moved by a ladder cord 14 suspended from the head box 12. Are supported in an aligned state. A bottom rail 18 serving as a lower end of the shielding material is provided below the slat 16, and the lower end of the ladder cord 14 is attached to the bottom rail 18.

  One end of the lifting / lowering cord 20 suspended from the head box 12 is attached to the bottom rail 18, and the other end of the lifting / lowering cord 20 passes through each slat 16 and is introduced into the head box 12. The drum 22 is pivotally supported by a drum receiver (not shown) so as to be wound and unwound.

  A drive shaft 24 that can rotate integrally with the drum 22 passes through the drum 22 to rotate the drum 22. One end of the drive shaft 24 is connected to the operation unit. The operation unit includes a pulley 26, a clutch device 27, and an operation cord 28 that is wound around the pulley 26. The clutch device 27 inserted between the pulley 26 and the drive shaft 24 transmits the rotation from the pulley 26 to the drive shaft 24, and the rotation from the drive shaft 24 is not transmitted to the pulley 26 and prevents rotation. For this reason, the rotation of the drive shaft 24 due to the weight of the slat 16 and the bottom rail 18 is blocked by the clutch device 27 so that the slat 16 can maintain its height position.

  By operating the operation cord 28 to rotate the pulley 26, the rotation of the pulley 26 is transmitted to the drive shaft 24 to rotate the drum 22, and the lifting / lowering cord 20 is wound around the drum 22 or unwound from the drum 22. Is done. That is, the slat 16 is raised or lowered according to the rotational operation direction of the pulley 26.

  Furthermore, the blind 10 of the present invention includes a weight 30. As shown in FIGS. 3 to 5, the weight 30 includes a weight body 31 and a pair of swing shafts 32 that support the weight body 31, and can swing about a swing center shaft 33. The base end of one swing shaft 32 is pivotally supported by a bearing device 35 fixed to the head box 10, and the base end of the other swing shaft 32 is connected to the drive shaft 24 via a conversion device 34. .

  The conversion device 34 couples the weight 30 and the drive shaft 24 to convert the rotational motion of the drive shaft 24 into the swing motion of the weight 30 and converts the swing motion of the weight 30 into the rotational motion to convert the drive shaft 24 into the drive shaft. 24. In other words, the rotational motion of the drive shaft 24 is decelerated by the conversion device 34 and becomes the swing motion of the weight 30, and the swing motion of the weight 30 is accelerated and becomes the rotational motion of the drive shaft 24.

  The conversion device 34 can take an arbitrary configuration, and includes, for example, spur gears 36 and 37 and a planetary gear mechanism 38 as shown in FIG. The spur gear 36 is integrally fixed to the drive shaft 24 and meshes with the spur gear 37, and the spur gear 37 is connected to the rotation shaft 38 a of the planetary gear mechanism 38. In this example, the planetary gear mechanism 38 is a two-row planetary gear mechanism array, and includes a sun gear 40 connected to the rotary shaft 38a, a carrier 44 that supports the planetary gear 42 that meshes with the sun gear 40, and a planetary gear. A first planetary gear train 50 comprising an internal gear 46 that meshes with the gear 42, the sun gear 40, a planetary gear 52 that is supported by the carrier 44 and meshes with the sun gear 40, and an internal gear that meshes with the planetary gear 52. And the second planetary gear train 58, and the internal gear 54 is connected to the swing shaft 32. The internal gear 46 is fixed to the head box 10, and by making the diameters of the internal gear 46 and the internal gear 54 close to each other, the movement of the swing shaft 32 with respect to the rotary shaft 38 a is highly decelerated. The motion of the rotating shaft 38a is increased at a high speed.

  This high speed reduction ratio or high speed increase ratio determines the number of revolutions of the drum 22 required when the lifting / lowering cord 20 is wound or unwound in order to move the slat 16 between the maximum raised position and the maximum lowered position. When N is N and the swing angle range θrange of the weight 30 is N: θ / 360 °.

  In this embodiment, the swing angle range θrange = 90 °. In this case, in the state where the slat 16 is lowered to the maximum, the weight 30 stands vertically and the weight main body 31 is directly above the swing center shaft 33. As shown (see FIG. 5A), in the state where the slat 16 is raised to the maximum, the weight 30 is tilted horizontally so that the weight main body 31 is directly beside the swinging central axis 33 (FIG. 5 ( b) see) is set.

  The operation of the blind constructed as described above will be described. Now, let us assume that the slat 16 is in the maximum lowered state. At this time, as described above, the weight main body 31 is directly above the oscillation center shaft 33, and the rotational moment due to the gravity acting on the weight 30 is zero, and is transmitted from the weight 30 to the drive shaft 24. The rotational force is zero.

When the operation cord 28 is operated in the ascending direction and the pulley 26 is rotated in the ascending direction, the drum 22 is rotated via the drive shaft 24, and the lifting / lowering cord 20 is wound, and the slat 16 is raised. The rotational movement of the pulley 26 is transmitted to the weight 30 via the drive shaft 24 and the conversion device 34, and the weight 30 starts to swing. When the weight 30 starts swinging, a rotational moment of LW g · sin θ is generated according to the swing angle θ as shown in FIG. 6 (W: mass of the weight main body 31, g: gravitational acceleration, L: This rotational moment) is transmitted to the drive shaft 24 via the converter 34 as a rotational force in the winding direction of the lifting / lowering cord 20, that is, the slat ascending direction. In other words, the rotational moment generated by the weight 30 can be used as an operating force in the upward direction of the slats 16, so that the operating load can be reduced.

  As the slat 16 rises to the maximum, the weight of the slat 16 lifted to the bottom rail 18 from below acts on the lifting / lowering cord 20 and the tension of the lifting / lowering cord 20 increases, so that the necessary operating force increases, but the weight 30 Since the rotational moment due to increases also, it is possible to correspond to the required operating force. As shown in FIG. 7, when the slat 16 is raised to the maximum, the swing angle of the weight 30 becomes 90 °, and the rotational moment by the weight 30 becomes the maximum.

  Conversely, when lowering the slat 16, the weight 30 swings in the opposite direction. At this time, the rotational moment due to the weight 30 is transmitted as a rotational force in a direction opposite to the direction in which the drive shaft 24 rotates, but since the slat 16 is moved in the direction of gravity, the operation load that is originally necessary is small. Does not affect the operation.

  As the operation part, the ascending operation transmits the rotation in the upward direction to the drive shaft 24 and the drum 22, and the lowering operation separates the drive shaft 24 from the operation part and lowers it by its own weight of the slat 16 and the bottom rail 18. In other cases, a type that prevents rotation from the drive shaft 24 can be used. In this case, the rotational force from the weight 30 can be used as a braking force when the slat 16 is lowered.

(Second Embodiment)
8 and 9 are views showing main parts of the blind according to the second embodiment of the present invention. The same members as those of the previous embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

  In the second embodiment, the drive shaft is divided into a first drive shaft 60 and a second drive shaft 62. One end of the first drive shaft 60 is connected to the operation portion, and the other end is a conversion device. This is an input shaft 38 a of 34 planetary gear mechanisms 38. The weight 30 is connected via the conversion device 34. Further, the second drive shaft 62 passes through the drum 22 and can rotate integrally with the drum 22.

  The spur gear 64 fixed to the first drive shaft 60 and the spur gear 66 fixed to the second drive shaft 62 are engaged with each other, and the rotation from the first drive shaft 60 is transmitted to the second drive shaft 62. It has come to be.

  Also in this configuration, the rotational motion of the first drive shaft 60 based on the operation of the operation unit is transmitted to the weight 30 by the conversion device 34 and converted into the swing motion of the weight 30, and the rotational moment generated by the weight 30 is second. It can be transmitted to the drive shaft 62, and the same operation and effect as the first embodiment can be obtained.

(Third embodiment)
10 and 11 are views showing main parts of the blind according to the third embodiment of the present invention. The same members as those of the previous embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

  In the third embodiment, the swing shaft 32 of the weight 30 is telescopically extendable in the axial direction, and a compression spring 70 is wound around the swing shaft 32. The compression spring 70 presses the weight main body 31 and urges the swing shaft 32 in the extending direction.

  The head box 12 is formed with an opening 12a so as to correspond to the extension of the swing shaft 32 of the weight 30, and the swing shaft 32 can project from the opening 12a.

  When the slat 16 is in the maximum lowered state and the weight 30 is upright, the gravity Wg of the weight main body 31 overcomes the spring force of the spring 70, and the swing shaft 32 is L, which is the minimum length. It has become. When the weight 30 starts swinging as the slat 16 rises, the component force in the direction of the swing shaft 32 of the gravity of the weight main body 31 is reduced, and the spring 70 is less than the component force. The spring force is increased, and the swing shaft 32 starts to be extended by the biasing force of the spring 70. Thereafter, it is assumed that the swing shaft 32 extends to balance the component force, and the swing shaft 32 extends to the maximum (for example, a length of 3 L) at the swing angle θ = 90 ° where the slat 16 is lifted to the maximum. Assuming that the length x of the rocking shaft 32 in the middle is x = (3-2 cos θ / cos θ1) · L. Here, cos θ1 is a swing angle when the swing shaft 32 starts to expand.

  Thus, when the length of the swing shaft 32 becomes longer as the swing angle θ increases, the rotational moment due to the weight 30 increases almost linearly as the slat 16 rises as shown in FIG. In addition, as the number of slats 16 lifted to the bottom rail 18 increases as the slats 16 rise, the required operation load can be increased linearly, and the operation load can be effectively reduced. Can be aimed at.

  When a large operation load is not required, the swing shaft 32 is shortened, so that the weight 30 can be accommodated in a compact manner.

(Fourth embodiment)
13 and 14 are rear views of the blind according to the fourth embodiment of the present invention. The same members as those of the previous embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

  In the fourth embodiment, a weight 30 is disposed on the back side of the head box 12, and the weight 30 is swung to such an extent that the weight 30 is not exposed when the slat 16 is maximally raised as shown in FIG. The length of the moving shaft 32 is long.

  In this embodiment, the weight 30 tilts substantially horizontally with respect to the swing center shaft 33 with the slat 16 lowered to the maximum, and the weight 30 directly below the swing center shaft 33 with the slat 16 raised to the maximum. As shown in FIG. 3, the weight 30 is oscillating, and the rotational moment is highest when the slat 16 is fully lowered, and is smallest when the slat 16 is fully raised. However, since the length of the oscillating shaft 32 can be made sufficiently long, the rotational moment due to the weight 30 can be increased, and the operation load can be sufficiently reduced.

  In the above embodiment, the swing angle range θrange is 90 °. However, the present invention is not limited to this, and any angle range in FIG. 7 can be used, and the swing angle range θrange is 45 to 180 °. , Preferably, it can set at 90-120 degrees. The swing angle can be any angle other than 0 to 90 ° in the first to third embodiments and 90 to 180 ° in the fourth embodiment.

  In addition, the arrangement of the operation unit, the drive shaft, the conversion device, and the weight is not limited to the above-described embodiment, and can be configured arbitrarily. In addition to the configurations of the first and second embodiments shown in FIGS. 15A and 15B, as shown in FIG. 15C, the operation unit and the first drive shaft 80 are connected, The conversion device 34 converts the rotational motion of the first drive shaft 80 into the swing motion of the weight 30, and also converts the swing motion of the weight 30 into the rotational motion of the second drive shaft 82. A configuration in which the rotation of the shaft 82 is transmitted to the drum 22 may be employed.

It is a front view showing the blind concerning a 1st embodiment of the present invention, and expresses the state where a shielding material fell to the maximum. It is a front view of the blind which concerns on 1st Embodiment, and represents the state which the shielding material raised to the maximum. It is a fragmentary sectional view of a blind concerning a 1st embodiment, and (a) shows the state where a shielding material lowered to the maximum, and (b) represents the state where a shielding material raised to the maximum. (A) showing an example of a converter is sectional drawing, (b) is sectional drawing seen along the 4b-4b line of (a). It is a figure showing the rocking | fluctuation operation | movement of the weight of 1st Embodiment, (a) represents the state which the shielding material lowered | hung at the maximum, (b) represents the state which the shielding material raised to the maximum. It is a figure showing the middle of the rocking | fluctuation operation | movement of a weight. It is a graph showing the relationship between the rocking angle of a weight and the rotational moment by a weight. It is a fragmentary sectional view of the blind concerning a 2nd embodiment of the present invention, (a) shows the state where a shielding material lowered to the maximum, and (b) expresses the state where a shielding material raised to the maximum. It is the fragmentary sectional view of the blind which concerns on 2nd Embodiment of this invention, (a) is sectional drawing seen along the 9a-9a line of FIG. 8, (b) is along the 9b-9b line of FIG. FIG. It is a fragmentary sectional view of a blind concerning a 3rd embodiment of the present invention, (a) shows the state where a shielding material lowered to the maximum, and (b) represents the state where a shielding material raised to the maximum. It is a figure showing the rocking | fluctuation operation | movement of the weight of 3rd Embodiment, (a) represents the state which the shielding material lowered | hung at the maximum, (b) represents the state which the shielding material raised to the maximum. It is a graph showing the relationship between the rocking | fluctuation angle of the weight of 3rd Embodiment, and the rotational moment by a weight. It is a rear view of the blind which concerns on 4th Embodiment of this invention, and represents the state which the shielding material lowered | hung at the maximum. It is a rear view of the blind which concerns on 4th Embodiment of this invention, and represents the state which the shielding material rose to the maximum. It is a schematic diagram showing the structure of this invention, (a) represents 1st Embodiment, (b) represents 2nd Embodiment, (c) represents another embodiment.

Explanation of symbols

16 slats (shielding material)
20 Lifting cord 22 Drum 24 Drive shaft 26 Pulley (operation part)
27 Clutch device (operation unit)
28 Operation code (operation unit)
30 Weight 31 Weight body 32 Oscillating shaft 33 Oscillating center shaft 34 Conversion device 60 First drive shaft 62 Second drive shaft

Claims (5)

The shielding member (16), the lifting / lowering cord (20) having one end connected to the shielding member (16) and capable of raising and lowering the shielding member, and the other end of the lifting / lowering cord (20) are connected so as to be wound and unwound. A drum (22), a drive shaft (24, 60, 62, 80, 82) for rotationally driving the drum (22), and an operation unit (26, 27, 28) operated to rotationally drive the drive shaft In the blind with
The weight (30) that can swing about the swing center axis (33) and generates a rotational moment due to gravity around the swing center axis (33), and the operation of the operation portions (26, 27, 28) A conversion device (34) for converting the swinging motion of the weight (30) and transmitting the rotational force generated by the rotational moment generated by the weight (30) to the drive shaft (24, 60, 62, 80, 82); When the operating portion (26, 27, 28) is operated in the shielding material ascending direction, the rotational force in the shielding material ascending direction is generated by the rotational moment generated by the weight (30). , 62, 80, 82).   The rotational motion of the drive shaft (24, 60, 62, 80, 82) based on the operation of the operation unit (26, 27, 28) is transmitted to the conversion device (34), and the conversion device (34) is rotated. 2. Blind according to claim 1, characterized in that the movement is converted into a swinging movement of the weight (30).   The drive shaft includes a first drive shaft (60, 80) connected to the operation unit and a second drive shaft (62, 82) connected to the drum (22). The blind according to claim 1, wherein the conversion device is provided between the second drive shaft and the second drive shaft.   The weight (30) includes an extendable swing shaft (32) that is pivotally supported by a swing center shaft (33), and a weight body (31) supported by the swing shaft (32). 4. The distance from the swing center axis (33) of the weight body (31) can be varied by extending and retracting the swing shaft (32). Blind as described in. The swing range of the weight (30) is set to a range of 90 degrees between a state where the swing (30) stands vertically above the swing center axis (33) and a state where the weight (30) tilts horizontally from the swing center axis (33). The blind according to any one of claims 1 to 4, wherein the blind is provided.

Images