JP6300450B2 - Solar shading material lifting device - Google Patents

Description

  The present invention relates to a solar shading material lifting device used in solar shading devices such as horizontal blinds, scooping curtains, pleated screens, and roll blinds.

  In the solar shading device, one end of the lifting / lowering cord is attached to the solar shading material suspended from the head box and the intermediate rail or the bottom rail provided at the lower part thereof, and the other end of the lifting / lowering cord is attached to the winding shaft. By rotating the take-up shaft, the elevating cord is taken up and rewound to raise and lower the solar shading material. Among such solar radiation shielding devices, there is a device provided with a limit device that restricts the rotation of the winding shaft when the lower end of the solar radiation shielding material reaches a desired position (for example, Patent Document 1 and 2).

  The limit device generally has a screw shaft, a slider that moves along the screw shaft, and a contact portion that contacts the slider, and the screw shaft is rotated along with the rotation of the drive shaft that rotates the winding shaft. Alternatively, the slider is rotated, thereby moving the slider. When the slider comes into contact with the contact portion, the screw shaft stops rotating, and the rotation of the drive shaft and the winding shaft stops.

  By providing such a limit device, the lower limit of the solar shading material can be set, but there is a desire to appropriately set the lower limit of the solar shading material at a desired position instead of a fixed position.

  In Patent Document 1, it is possible to set the lower limit position of the solar radiation shielding material by engaging the worm with the screw shaft and rotating the worm to move the slider.

  In Patent Document 2, by changing the protrusion amount of the abutting portion with which the slider abuts, the position where the slider abuts against the abutting portion is changed, thereby making it possible to set the lower limit position of the solar radiation shielding material. ing.

JP 2010-261194 A JP 2012-122217 A

  Each of the techniques disclosed in Patent Documents 1 and 2 is a technique suitable for fine adjustment of the lower limit position of the solar radiation shielding material, and it is impossible or laborious to largely adjust the lower limit position of the solar radiation shielding material. It takes.

  This invention is made | formed in view of such a situation, and provides the solar radiation shielding apparatus which can change the lower limit position of a solar radiation shielding material easily and significantly.

  According to the present invention, the head box, the winding shaft housed in the head box and rotating the solar shading material by rotation, the drive shaft rotating the winding shaft, and the solar shading material reach the lower limit. There is provided a solar shading material elevating device including a limit device that restricts rotation of the drive shaft when connected, and a connecting / separating portion that can connect and separate the limit device to and from the drive shaft.

  In the prior art, the limit device is always connected to the drive shaft, and the lower limit position is set by changing the position of the slider or the contact portion. However, the present inventor always uses the limit device as the drive shaft. I realized that it is not always necessary to connect them. Then, by rotating the winding shaft in a state where both are separated, the lower end position of the solar radiation shielding material is changed, and then the lower limit position of the solar radiation shielding material is easily and easily connected by connecting the limit device and the drive shaft. The inventors have come up with the idea that the present invention can be changed greatly, and have completed the present invention.

  According to this method, for example, in a state where the solar radiation shielding material is lowered to the lower limit, the limit device and the drive shaft are separated, and in this state, the lower limit of the solar radiation shielding material is moved to a desired position. Are connected, the lower end of the solar shading material when the connection is made becomes a new lower limit. In this way, the lower limit of the solar radiation shielding material can be freely determined by a simple operation of separating the limit device and the drive shaft → moving the lower end of the solar radiation shielding material → connecting the limit device and the drive shaft.

  In the techniques of Patent Documents 1 and 2, the lower limit of the solar radiation shielding material is changed by changing the amount of rotation of the screw shaft or slider until the slider contacts the contact portion. Since the relationship between the amount of rotation and the lower limit moving amount of the solar shading material is not intuitively clear, experience is required to appropriately adjust the lower limit of the solar shading material. In contrast, in the present invention, when the limit device and the drive shaft are separated in a state where the solar radiation shielding material is lowered to the lower limit, the lower end of the solar radiation shielding material when the limit device and the drive shaft are reconnected is a new lower limit. Therefore, it has the advantage of being intuitive and easy to understand.

Hereinafter, various embodiments of the present invention will be exemplified. The following embodiments can be combined with each other.
Preferably, the limit device is disposed on an extension line of the drive shaft, and the connection / separation unit connects the limit device to the drive shaft by moving the limit device in an axial direction of the drive shaft. And separate.
Preferably, the limit device has a head portion engageable with the drive shaft on a surface facing the drive shaft, and the head portion is biased in a direction approaching the drive shaft.
Preferably, the limit device includes a screw shaft, a slider that moves along the screw shaft as the screw shaft rotates, and a contact portion that restricts the movement of the slider. When the limit device is connected to the drive shaft, the limit device rotates as the drive shaft rotates.
Preferably, an elevating cord having one end attached to the lower side of the solar shading material and the other end attached to the take-up shaft is further wound and unwound on the take-up shaft. The solar shading material is moved up and down.
Preferably, one end of the elevating cord is attached to an intermediate rail or a bottom rail provided below the solar radiation shielding material.

It is a front view of the pleat screen of one embodiment of the present invention. It is a right view of the pleat screen of FIG. It is a top view of the pleat screen of FIG. 4 (a) is an enlarged view of region X in FIG. 3, FIG. 4 (b) is a front view of FIG. 4 (a), and FIG. 4 (c) is a view in FIG. 4 (b). It is CC sectional drawing. FIGS. 5A and 5B are enlarged views of a region Y in FIG. 4A for explaining a method of connecting the intermediate limit device and the first drive shaft.

  Hereinafter, embodiments of the present invention will be described. Various characteristic items shown in the following embodiments can be combined with each other. In the following embodiments, in a pair-type pleated screen having an upper fabric and a lower fabric, an explanation will be given by taking as an example a case where the lower limit of the intermediate rail provided at the lower portion of the upper fabric is set by the limit device of the present invention. Proceed. As will be described in detail later, the present invention can also be applied to the lower limit setting of the bottom rail of a single or pair type pleated screen, the lower limit setting of a horizontal blind, a raising curtain, and a roll blind.

  In the pleated screen shown in FIGS. 1 to 3, an upper screen 2 is suspended and supported from a head box 1, and an intermediate rail 3 is attached to the lower end of the upper screen 2. A lower screen 4 is suspended and supported from the intermediate rail 3, and a bottom rail 5 is attached to the lower end of the lower screen 4.

  The upper screen 2 allows a semi-permeable fabric such as a lace fabric to be folded in a zigzag shape, and the lower screen 4 enables a light-shielding fabric to be folded in a zigzag shape.

  A pitch holding cord 39 is provided between the head box 1 and the bottom rail 5 to hold the pitch of the folds of the upper screen 2 and the lower screen 4. The pitch holding cord 39 is provided with a large number of annular holding portions 43 at equal intervals. After the holding portions 43 are inserted into the upper screen 2 or the lower screen 4, a first rail for raising and lowering the intermediate rail 3 is provided. By inserting the lifting / lowering cord 6 or the second lifting / lowering cord 7 for raising and lowering the bottom rail 5 through the holding portion 43, the holding portion 43 is prevented from coming off from the upper screen 2 or the lower screen 4, thereby the upper screen 2. In addition, the pitch of the lower screen 4 can be maintained. The pitch holding cord 39 is disposed on the opposite side of the upper screen 2 or the lower screen 4 from the first and second lifting cords 6 and 7.

  The first lifting / lowering cord 6 is attached to the intermediate rail 3 and attached to the first winding shaft 9 arranged on the outside of the room (the right side in FIG. 2 and the upper side in FIG. 3). The first winding shaft 9 rotates together with the first drive shaft 11. Further, the rotational force in the direction of arrow A in FIG. 3 applied to the pulley 15 by the ball chain 16 is transmitted to the first drive shaft 11 via the first transmission clutch 20.

  Further, the second lifting / lowering cord 7 is attached to the bottom rail 5 and attached to the second winding shaft 10 disposed inside the room (the left side in FIG. 2 and the lower side in FIG. 3). The second winding shaft 10 rotates together with the second drive shaft 12. Further, the rotational force in the direction of arrow B in FIG. 3 applied to the pulley 15 by the ball chain 16 is transmitted to the second drive shaft 12 via the second transmission clutch 21.

  The first and second drive shafts 11 and 12 are inserted into the stopper device 24 at the intermediate portion of the head box 1. The stopper device 24 has a known function of preventing the weight drop of the intermediate rail 3 and the bottom rail 5 when the ball chain 16 is released after the lifting operation of the intermediate rail 3 or the bottom rail 5.

  As shown in FIGS. 1 and 3, the first and second drive shafts 11 and 12 are inserted through the governor device 36 on the side of the stopper device 24. The governor device 36 suppresses the rotational speed of the first and second drive shafts 11 and 12 to a predetermined value or less, and suppresses the descending speed when the intermediate rail 3 and the bottom rail 5 are lowered by their own weight to a predetermined speed or less.

  Here, the operation of the pleated screen will be described. When the ball chain 16 is pulled in the direction of arrow A in FIG. 2, the rotational force generated by the force is transmitted to the first and second transmission clutches 20 and 21 shown in FIG. 3 via the pulley 15. The first transmission clutch 20 transmits only the rotational force in the direction of arrow A in FIG. 3 to the first drive shaft 11 having a hexagonal bar shape, and the second transmission clutch 21 transmits only the rotational force in the direction of arrow B in FIG. Since it is configured to transmit to the second drive shaft 12, the rotational force generated by pulling the ball chain 16 in the direction of the arrow A in FIG. 2 is transmitted only to the first drive shaft 11, and the first drive Only the shaft 11 is rotated. By the rotation of the first drive shaft 11, the first take-up shaft 9 rotatably supported by the support member 8 in the head box 1 rotates in the direction of arrow A in FIG. And the intermediate rail 3 attached to the tip of the first lifting / lowering cord 6 is raised.

  When the hand is released from the ball chain 16 in this state, the stopper device 24 is activated to prevent the intermediate rail 3 from being lowered by its own weight. In this state, when the ball chain 16 is pulled again in the direction of the arrow A and then released, the action of preventing the weight drop of the stopper device 24 is released, and the first lifting / lowering cord 6 is rewound from the first winding shaft 9. As a result, the intermediate rail 3 is lowered.

  On the other hand, when the ball chain 16 is pulled in the direction of arrow B in FIG. 2, the rotational force generated by the force is transmitted to the first and second transmission clutches 20 and 21 shown in FIG. The rotational force is transmitted only to the second drive shaft 12 by the action of the first and second transmission clutches 20 and 21. By the rotation of the second drive shaft 12, the second winding shaft 10 rotatably supported by the support member 8 in the head box 1 rotates in the direction of arrow B in FIG. The bottom rail 5 attached to the tip of the second lifting / lowering cord 7 is lifted.

  When the hand is released from the ball chain 16 in this state, the stopper device 24 is activated to prevent the bottom rail 5 from dropping its own weight. In this state, when the ball chain 16 is pulled again in the direction of the arrow B and then released, the action of preventing the weight reduction of the stopper device 24 is released, and the second lifting / lowering cord 7 is rewound from the second winding shaft 10. As a result, the bottom rail 5 is lowered.

  An intermediate limit device 37 that sets a maximum rewinding amount of the first lifting / lowering cord 6 from the first winding shaft 9 and sets a lower limit position of the intermediate rail 3 at the other end of the head box 1, A lower limit device 38 that sets the maximum rewind amount of the second lifting / lowering cord 7 from the two winding shaft 10 and sets the lower limit position of the bottom rail 5 is provided.

  Here, the details of the intermediate limit device 37 and the lower limit device 38 will be described with reference to FIGS. The lower limit device 38 is a known mechanism, and the intermediate limit device 37 includes a connection / separation lever (connection / separation unit) 55 that can connect and disconnect the intermediate limit device 37 to the first drive shaft 11. It is said.

  The intermediate limit device 37 includes a first screw shaft 44, a first slider 48 that moves along the first screw shaft 44 as the first screw shaft 44 rotates, and a first that regulates the movement of the first slider 48. A contact portion 52. The lower limit device 38 is a second screw shaft 45, a second slider 49 that moves along the second screw shaft 45 as the second screw shaft 45 rotates, and a second that restricts the movement of the second slider 49. A contact portion 53. The first and second screw shafts 44 and 45 are rotatably supported by the first and second screw shaft supports 58 and 59, respectively. The connection / separation lever 55 is connected to the first screw shaft support 58, and by sliding the connection / separation lever 55, the first screw shaft support 58 and the member supported thereby are slid integrally. Thus, the separation state (the state shown in FIG. 4A) and the connection state (the state shown in FIGS. 5A to 5B) can be switched. Further, as shown in FIG. 4C, the connection / separation lever 55 has a protrusion 61 on the upper surface, and as shown in FIGS. 4A and 4C, the second screw shaft support 59 is Three openings 70, 71, 72 are provided. In the separated state, the protrusion 61 engages with the central opening 70 to maintain the state, and in the connected state, the protrusion 61 engages with the right opening 71 to maintain the state. When the first drive shaft 11 is on the right side of the intermediate limit device 37 as in the present embodiment (eg, in the case of a right-handed solar shading material lifting device), the left opening 72 is not used. On the other hand, when the first drive shaft 11 is on the left side of the intermediate limit device 37 (eg, in the case of a left-handed solar shading material lifting device), the right opening 71 is not used and the protrusion 61 is the central opening 70. And the left opening 72 are switched to separate and connect the intermediate limit device 37 and the first drive shaft 11.

  The second screw shaft 45 is always connected to the second drive shaft 12 and rotates together with the second drive shaft 12. The second screw shaft 45 is a left-hand screw, the inner surface of the second slider 49 is a female screw that engages with the thread of the second screw shaft 45, and the rotation of the second slider 49 is restricted. Therefore, when the second drive shaft 12 rotates in the direction of arrow B (winding direction of the second lifting / lowering cord 7), the second lifting / lowering cord 7 is wound around the second winding shaft 10 and the bottom rail 5 is raised. At the same time, the second slider 49 moves in the direction of arrow D (the direction away from the second contact portion 53). Next, when the weight lowering prevention operation of the stopper device 24 is canceled by the above-described method and the bottom rail 5 is lowered by its own weight, the second winding shaft 10 is moved in the direction opposite to the arrow B (the unwinding direction of the second lifting cord 7). ) To rewind the second lifting / lowering cord 7 and to rotate the second drive shaft 12, thereby rotating the second screw shaft 45 and moving the second slider 49 in the direction of the arrow E (second contact). In a direction approaching the contact portion 53). When the second slider 49 comes into contact with the second contact portion 53, the rotation of the second screw shaft 45 is stopped, and accordingly, the rotation of the second drive shaft 12 and the second winding shaft 10 is stopped, and the bottom The rail 5 stops at the lower limit position. The lower limit position of the bottom rail 5 is set to a specific position at the time of manufacturing or installing the pleated screen, and after the installation, the lower limit position cannot be changed without disassembling the head box 1.

  On the other hand, the first screw shaft 44 can be connected to and separated from the first drive shaft 11. FIG. 4A shows a state where the first screw shaft 44 is separated from the first drive shaft 11, and the rotation of the first drive shaft 11 is not transmitted to the first screw shaft 44. An engagement protrusion 67 is provided on the first drive shaft 11 side. On the intermediate limit device 37 side, a head portion 63 having a protrusion that can be engaged with the engagement protrusion 67 is attached to the first drive shaft 11 by a spring 65. It is energized in the approaching direction. Then, when the connection / separation lever 55 is slid in the direction of arrow E, as shown in FIG. 5B, the projection of the head portion 63 engages with the engagement projection 67, and the first drive shaft 11 and the intermediate The connection of the limit device 37 is completed. In this state, the rotation of the first drive shaft 11 is transmitted to the first screw shaft 44 through the head portion 63. Immediately after sliding the connecting / separating lever 55, the protrusions of the head part 63 and the engaging protrusions 67 may come into contact with each other as shown in FIG. Since 63 is urged by the spring 65, when the first drive shaft 11 is slightly rotated and the relative angle between the protrusion of the head portion 63 and the engagement protrusion 67 is slightly changed, both are easily engaged. The engaged state is as shown in FIG.

Here, a method for setting the lower limit position of the intermediate rail 3 will be described. The basic operating principle of the intermediate limit device 37 is the same as that of the lower limit device 38, and the rotation of the first screw shaft 44 is stopped when the first slider 48 comes into contact with the first contact portion 52. Thus, the rotation of the first drive shaft 11 and the first take-up shaft 9 is stopped so that the intermediate rail 3 does not fall any further (note that the first screw shaft 44 is a right-hand screw, so the first slider 48 Is moved in the direction of arrow D when the first drive shaft 11 rotates in the direction of arrow A).
However, since the intermediate limit device 37 can be separated from the first drive shaft 11, the first slider 48 comes into contact with the first contact portion 52 by separating the intermediate limit device 37 from the first drive shaft 11. Even in this state, the first drive shaft 11 and the first take-up shaft 9 can be freely rotated. Then, when the intermediate limit device 37 and the first drive shaft 11 are connected after setting the intermediate rail 3 to a desired height, the height of the intermediate rail 3 at the time of connection becomes a new lower limit position. Therefore, the lower limit position of the intermediate rail 3 can be freely set by a simple operation of separation of the intermediate limit device 37 and the first drive shaft 11 → movement of the intermediate rail 3 → connection of the intermediate limit device 37 and the first drive shaft 11. can do. According to this method, the lower limit position of the intermediate rail 3 can be easily changed without disassembling the head box.

(Modification)
In the above embodiment, the intermediate limit device 37 and the first drive shaft 11 are separated and connected by sliding the intermediate limit device 37 in the axial direction of the first drive shaft 11. For example, a method of sliding the intermediate limit device 37 in the vertical direction or tilting the intermediate limit device 37 may be employed.

  In the above embodiment, the intermediate limit device 37 and the first drive shaft 11 are connected by engaging the protrusion of the head portion 63 biased by the spring 65 and the engaging protrusion 67, but the connection mechanism is Alternatively, for example, the first screw shaft 44 and the first drive shaft 11 may be brought into direct contact with each other, and both may be coupled by a frictional force between the opposing surfaces.

  In the above embodiment, the first slider 48 is moved by rotating the first screw shaft 44 in accordance with the rotation of the first drive shaft 11. However, another configuration is adopted for the slider moving method. For example, a slider having a male thread formed on the outer periphery is inserted into a screw cylinder having a female thread formed on the inner periphery, and the slider is moved by rotating the screw cylinder with the rotation of the first drive shaft 11. May be. Further, the configuration of the limit device is not limited to that of the above-described embodiment, and any other configuration may be used as long as it can regulate the rotation of the winding shaft when the solar shading material is lowered to a specific position. May be adopted.

  In the above embodiment, the lower limit for lowering the weight of the intermediate rail 3 is set, but the solar radiation shielding material may be lowered manually or electrically.

  In the above embodiment, the lower limit position of the intermediate rail 3 can be changed by the coupling and separating mechanism of the limit device and the drive shaft, but this mechanism can perform various types of solar shading that raises and lowers the solar shading material by rotating the winding shaft. Applicable to the device. Therefore, the present invention may be applied to enable changing the lower limit position of the bottom rail of a single or pair type pleated screen or the bottom rail of a horizontal blind, and may be applied to a scooping curtain or a roll blind. There is no bottom rail in the tucking curtain, but it is technically common with the above embodiment in that the lifting cord is rewound from the winding shaft to lower the curtain, and the roll blind has no lifting cord, It is technically common to the above embodiment in that the screen is rewound from the winding shaft and the screen is lowered.

1: Head box 2: Upper screen 3: Intermediate rail 4: Lower screen 5: Bottom rail 6: First lifting cord 7: Second lifting cord 8: Support member 9: First winding shaft 10: Second winding shaft 11: first drive shaft 12: second drive shaft 15: pulley 16: ball chain 20: first transmission clutch 21: second transmission clutch 24: stopper device 36: governor device 37: intermediate limit device 38: lower limit device 39 : Pitch holding cord 43: holding portion 44: first screw shaft 45: second screw shaft 48: first slider 49: second slider 52: first contact portion 53: second contact portion 55: connecting and separating lever ( (Connection and separation part)
58: first screw shaft support 59: second screw shaft support 61: protrusion 63: head portion 65: spring 67: engagement protrusions 70, 71, 72: opening

Claims (8)

A head box, a winding shaft housed in the head box and rotating the solar shading material by rotation, a driving shaft for rotating the winding shaft, and the driving shaft when the solar shading material reaches a lower limit A solar shading material elevating device, comprising: a limit device that restricts rotation of the light source; and a connecting / separating unit that can connect and separate the limit device to and from the drive shaft. The limit device is disposed on an extension line of the drive shaft, and the connection / separation unit connects and separates the limit device with respect to the drive shaft by moving the limit device in the axial direction of the drive shaft. The apparatus of claim 1. The limit device has a head portion engageable with the drive shaft on a surface facing the drive shaft, and the head portion is biased in a direction approaching the drive shaft. Item 3. The apparatus according to Item 2. The limit device includes a screw shaft, a slider that moves along the screw shaft as the screw shaft rotates, and a contact portion that restricts the movement of the slider, and the screw shaft includes the limit device. The device according to any one of claims 1 to 3, wherein the device rotates with the rotation of the drive shaft when coupled to the drive shaft. An elevating cord having one end attached to the lower side of the solar shading material and the other end attached to the take-up shaft; the elevating cord being wound and rewound on the take-up shaft; The device according to any one of claims 1 to 4, wherein the solar radiation shielding material is raised and lowered. The device according to claim 5, wherein one end of the elevating cord is attached to an intermediate rail or a bottom rail provided below the solar shading material. The limit device includes a screw shaft and a head portion movable along the axial direction of the screw shaft,
7. The head according to claim 1, wherein the head portion is provided on a surface facing the drive shaft, is engageable with the drive shaft, and is biased in a direction approaching the drive shaft. A device according to one. A lower limit adjustment method using the solar shading material elevating device according to any one of claims 1 to 7,
Separating the limit device from the drive shaft at the connection and separation unit;
Rotate the drive shaft in that state,
Thereafter, the method includes the step of connecting the limit device to the drive shaft in the connection / separation unit.