JP5102737B2 - blind - Google Patents

Description

  The present invention relates to a blind that includes an elevating cord and a dimming cord and that can change the exposure ratio of the first shielding material and the second shielding material, and in particular, prevents slack of the dimming cord when the shielding material is raised. It can be related to blinds.

  Conventionally, what was described in patent document 1 is known as this kind of blind. According to this, the 1st drum which can wind up the 1st raising / lowering cord and the 2nd drum which can wind up the 2nd raising / lowering cord are rotatably supported by the head box, and each drum was provided in the head box. The first and second feed screw shafts are screwed together, and the rotation from the input side is transmitted to the output side, but the rotation from the output side is stopped. The first and second clutch operating shafts are coupled to the drum rotation shafts, the first and second cord operating mechanisms are coupled to the output sides, and the first and second drums can be engaged with each other. First and second engaging members are provided.

  When the first operation cord is operated to rotate the first drum in the lifting / lowering cord winding direction to raise the bottom rail, the first drum rotates and moves in the head box by the first feed screw shaft. When the bottom rail pushes up the intermediate rail, the first engagement member of the first drum is engaged with the second engagement member of the second drum, and the second drum is rotated in the winding direction of the lifting / lowering cord. The lifting cord is wound up.

JP-A-2005-207161

  In the blind described in Patent Document 1, even when the bottom rail is in a state of lifting the intermediate bar while winding the first lifting cord around the first drum, the second lifting cord is wound around the second drum. It is possible to prevent the second lifting / lowering cord from loosening.

  However, when the first drum moves in the head box and the bottom rail lifts the intermediate bar, the first engagement member of the first drum is engaged with the second engagement member of the second drum. It is necessary to adjust the mounting positions of the first engagement member and the second engagement member in accordance with the product size of the blind, and it is difficult to assemble them. There's a problem.

  In addition, the first engagement member and the second engagement member need to be engaged with each other while relatively moving in the longitudinal direction of the bottom rail, and there is a problem that it is difficult to reliably complete the engagement operation.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a blind capable of preventing slack of the dimming cord by simple assembly.

In order to achieve the above-described object, according to the first aspect of the present invention, the upper end of the first shielding member is attached to the head box, and the upper end of the second shielding member is attached to the intermediate bar attached to the lower end of the first shielding member. One end of the lifting / lowering cord attached to the head box is attached to the lower end of the second shielding material, and one end of the dimming cord hanging from the head box is attached to the intermediate bar. The lower end of the second shielding member is raised and lowered by moving up and down, and the intermediate bar is raised and lowered by raising and lowering one end of the dimming cord so that the first shielding member and the second shielding member are exposed. In the blind where the proportion changes,
In the head box, a first winding drum in which the other end of the lifting / lowering cord is coupled so as to be wound and unwound, and a second winding in which the other end of the dimming cord is coupled so as to be wound and unwound. A drum, slack detection means for detecting slack of the light control cord, and interlocking means that operates by detecting slack by the slack detection means,
When the slack detecting means detects slack of the light control cord, the interlocking means operates to link the rotation of the second winding drum with the rotation of the first winding drum.

  According to a second aspect of the present invention, the interlocking means according to the first aspect is capable of rotating integrally with the first winding drum and not moving in the axial direction of the first winding drum, and the second winding drum. And a second gear that is not movable in the axial direction of the second winding drum, and an interlocking gear that is coupled to the looseness detecting means. The interlocking gear is connected to the first gear via the interlocking gear. It is possible to move between a position where the gear and the second gear are linked and a position where the gear is not linked.

  According to a third aspect of the present invention, the slack detecting means according to the second aspect of the present invention is configured so that the interlocking gear is rotatably supported and the position where the first gear and the second gear are interlocked via the interlocking gear is not interlocked. A lever portion that can move the interlocking gear between, a dimming cord abutting portion, and a dimming cord abutting portion that can swing the lever portion according to the slackness of the abutting dimming cord, It is characterized by having.

  According to a fourth aspect of the present invention, the interlocking gear according to the second or third aspect is characterized in that the interlocking gear is always kept in mesh with either the first gear or the second gear.

  According to the present invention, when the first winding drum rotates so as to wind up the lifting / lowering cord and the dimming cord is loosened while one end of the lifting / lowering cord is rising, the looseness detecting means detects the looseness. Since the interlocking means that operates thereby interlocks the rotation of the first winding drum with the rotation of the second winding drum, the second winding drum rotates together with the first winding drum, and the dimming cord is the second. Since it is wound by the winding drum, even if the intermediate bar rises as one end of the lifting / lowering cord rises, it is possible to prevent occurrence of excessive slack in the dimming cord.

  Since the interlocking means interlocks the rotation of the first winding drum with the rotation of the second winding drum based on the detection of the slack of the dimming cord by the slackness detecting means, adjustment according to the product size of the blind is unnecessary. The assembly can be simplified.

  According to the second aspect of the present invention, the first gear and the second gear are attached so as not to move in the axial direction of the take-up drum, and when the slack detecting means detects slack of the dimming cord. In addition, since the interlocking gear can move and the first gear and the second gear can be interlocked, it is not necessary to adjust the mounting positions of the first gear and the second gear for each product size. The interlocking means can be provided at a common position with respect to the blind.

  According to the third aspect of the present invention, when the dimming cord is loosened, the lever portion swings, and the interlocking gear is moved to a position where the first and second gears are interlocked via the interlocking gear. Therefore, the rotation of the first gear can be transmitted to the second gear via the interlocking gear. When the interlocking gear interlocks the first gear and the second gear, the interlocking gear rotates appropriately, so that the meshing of the gears can be completed with certainty.

  According to the fourth aspect of the present invention, the interlocking gear always maintains a state of meshing with either one of the first gear and the second gear, and when the dimming cord is loosened, the meshing state is maintained. Since it can be swung and meshed with the other gear while being maintained, the first gear and the second gear can be reliably interlocked.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 to 6 are views showing a first embodiment of a blind according to the present invention.

  In the figure, reference numeral 10 denotes a head box, which is fixed to a window frame, a wall surface or the like by a bracket 11, and an upper end of a first shielding member 14 is attached to the head box 10. An intermediate bar 18 is attached to the lower end of the first shielding member 14, and the upper end of the second shielding member 16 is attached to the intermediate bar 18. The lower end of the second shielding material 16 is a bottom rail 20, and each of the first shielding material 14 and the second shielding material 16 is formed of a pleated screen that can be folded in a zigzag manner.

  A lifting / lowering cord 22 is suspended from the head box 10 so that it can be lifted / lowered, and one end of the lifting / lowering cord 22 is inserted through each flange of the first shielding member 14 and each flange of the intermediate bar 18 and the second shielding member 16. It is connected to the rail 20. The other end of the lifting / lowering cord 22 is connected to the first winding drum 24 (see FIG. 2) rotatably supported in the head box 10 so as to be wound and unwound. A first winding shaft 26 (see FIG. 2) is connected to the first winding drum 24 so as to be integrally rotatable. The first winding shaft 26 is arranged at one end of the head box 10 via the controller unit 42. It is connected to a pulley 28 provided. An operation chain 30 is hung around the pulley 28, and the operation chain 30 is suspended from one end of the blind (the right end in FIG. 1). The first winding shaft 26 is attached with a stopper (not visible in FIG. 1 by the stopper 37) that can be switched between a state that restricts the rotation of the first winding shaft 26 and a state that allows the rotation.

  Similarly, a dimming cord 32 is suspended from the head box 10 so as to be able to move up and down, and one end of the dimming cord 32 is connected to the intermediate bar 18 through each hook of the first shielding member 14. The other end of the dimming cord 32 is connected to the second winding drum 34 rotatably supported in the head box 10 so as to be wound and unwound. The second winding drum 34 is set to have the same diameter method as the first winding drum 24. A second winding shaft 36 is coupled to the second winding drum 34 so as to be integrally rotatable. The second winding shaft 36 is connected to a pulley 38 disposed at one end of the head box via a controller unit 42. It is connected. An operation chain 40 is hung around the pulley 38, and the operation chain 40 is suspended from one end of the blind (the right end in FIG. 1). A stopper 37 that can be switched between a state that restricts the rotation of the second winding shaft 36 and a state that allows the rotation is attached to the second winding shaft 36.

  The driving forces of the pulley 28 and the pulley 38 are transmitted to the first winding shaft 26 and the second winding shaft 36 by the clutch built in the controller unit 42, respectively. The driving force from the shaft 36 is configured not to be transmitted to the pulley 28 and the pulley 38, respectively.

  As shown in FIG. 2, the first winding drum 24 and the second winding drum 34 are juxtaposed in the horizontal direction by a drum receiver 43 fixed in the head box 10.

  Furthermore, as shown in FIGS. 2 to 4, a slack detecting means 44 for detecting slack of the dimming cord 32 is provided in the head box 10, and an interlocking means 50 connected to the slack detecting means 44 is further provided. Provided.

  The slack detecting means 44 has a dimming cord abutting portion 46 that is slidable in the front-rear direction of the head box 10 in the vicinity of the bottom of the drum receiver 43, and a base end portion that rotates to the dimming cord abutting portion 46. It has a lever portion 48 that can be attached and can swing, and a spring 49 as an elastic body that urges the dimming cord contact portion 46. As shown in FIG. 5, the dimming cord abutting portion 46 is formed with an insertion hole 46a through which the dimming cord 32 is inserted so that the dimming cord 32 comes into contact therewith. In 46, a spring accommodating portion 46b for accommodating the spring 49 is formed.

  When the dimming cord 32 is not slack, the dimming cord abutting portion 46 is relatively positioned against the urging force of the spring 49 by the tension of the dimming cord 32 as shown in FIG. If the dimming cord 32 is located behind the box 10 and the dimming cord 32 is loosened, the dimming cord abutting portion 46 is relatively moved by the biasing force of the spring 49 as shown in FIG. It is located on the front side.

  The lever portion 48 is composed of a pair of lever plates 48a and 48a. Then, a pin 48b installed across the pair of lever plates 48a, 48a at the base end portion of the lever portion 48 is fitted in a pin receiver 46c formed in the dimming cord contact portion 46 so as to be movable in the vertical direction. Accordingly, the lever portion 48 can swing with respect to the dimming cord contact portion 46. Further, in the central portion of the lever portion 48, the second winding shaft 36 passes through the lever portion 48 so as to be rotatable, and the position of the central portion of the lever portion 48 is fixed by the second winding shaft 36. ing. Accordingly, the lever portion 48 swings around the central portion in response to the sliding of the light control cord contact portion 46.

  The interlocking unit 50 is connected to the first winding shaft 26, can rotate integrally with the first winding drum 24, and cannot move in the axial direction of the first winding drum 24 and the longitudinal direction of the head box 10. 52, a second gear 54 that is connected to the second winding shaft 36, can rotate integrally with the second winding drum 34, and cannot move in the axial direction of the second winding drum 34 and the longitudinal direction of the head box 10. And an interlocking gear 56 that is rotatably supported by the free end portion of the lever portion 48 and can interlock the first gear 52 and the second gear 54.

  Specifically, the first gear 52 is non-rotatably fitted to the outer periphery of the first winding shaft 26 so as not to move in the axial direction, and the second gear 54 is non-rotatable to the outer periphery of the second winding shaft 36. It is fitted so that it cannot move in the axial direction.

  In this embodiment, the interlocking gear 56 and the second gear 54 are rotatably connected to the lever part 48 so as to be sandwiched between the pair of lever plates 48a, 48a of the lever part 48, and the interlocking gear 56 and the second gear 54 are interlocked. The gear 56 always meshes with the second gear 54.

  Next, the operation of this embodiment will be described.

  In the state shown in FIG. 6A in which the first shielding member 14 and the second shielding member 16 are completely lowered, the second winding shaft 36 is rotated by operating the operation chain 40 and rotating the second winding shaft 36. The take-up drum 34 winds or unwinds the dimming cord 32, one end of the dimming cord 32 moves up and down, and the intermediate bar 18 moves up and down, so that either the first shielding material 14 or the second shielding material 16 Is folded and the other is extended, so that the exposure ratio of the first shielding material 14 and the second shielding material 16 can be changed. At this time, the second gear 54 and the interlocking gear 56 also rotate integrally with the second winding shaft 36, but the interlocking gear 56 is in a position where the first gear 52 and the second gear 54 are not interlocked, The gear 52 does not rotate.

  Further, when both the shielding members 14 and 16 are raised from the state shown in FIG. 6A, the operation chain 30 is operated to rotate the first winding shaft 26 in a predetermined direction. As a result, the first winding drum 24 winds up the lifting / lowering cord 22, one end of the lifting / lowering cord 22 is raised, and the bottom rail 20 is raised, so that the second shielding member 16 is folded and raised. At this time, the first gear 52 also rotates integrally with the first winding shaft 26. However, while the intermediate bar 18 is not raised, the dimming cord contact portion 46 is pressed by the dimming cord 32, and the lever portion 48 is in the position shown in FIGS. 3 (a) and 4 (a). In addition, since the interlocking gear 56 is in a position where the first gear 52 and the second gear 54 are not interlocked, only the first gear 52 rotates and the second gear 54 does not rotate.

  Further, when the bottom rail 20 is raised and the second shielding material 16 is all folded, the folded second shielding material 16 comes into contact with the intermediate bar 18 as shown in FIG. The intermediate bar 18 is pushed up. As a result, the dimming cord 32 is loosened, and in the slackness detecting means 44, the tension of the dimming cord 32 applied to the dimming cord abutting portion 46 disappears, and therefore, in FIGS. 2 (c) and 4 (b). As shown, the light control cord contact portion 46 slides due to the elastic force of the spring 49. The lever portion 48 swings about the second winding shaft 36 in response to the sliding of the light adjusting cord contact portion 46, so the interlocking gear 56 pivotally attached to the free end portion of the lever portion 48 together. It moves to mesh with the first gear 52 and reach a position where the first gear 52 and the second gear 54 are interlocked.

  Thereby, as shown in FIGS. 3B and 4B, the rotation from the first winding shaft 26 is transmitted to the second winding shaft 36 via the interlocking means 50, and the second winding shaft 36 is rotated. The drum 34 rotates to wind up the light control cord 32.

  Here, since the second winding drum 34 has the same diametrical dimension as the first winding drum 24 and the same rotation cycle, the lifting / lowering cord 22 and the light control cord 32 are wound at the same speed. It will be. For this reason, the second winding drum 34 loosens the dimming cord 32 formed between when the intermediate bar 18 begins to be pushed up and when the interlocking gear 56 interlocks the first gear 52 and the second gear 54. The dimming cord 32 is wound up while remaining. Thereby, the interlocking of the first gear 52 and the second gear 54 by the interlocking gear 56 is maintained, and the excess slack of the dimming cord 32 is wound up, and the appearance can be improved. .

  When the slack of the dimming cord 32 is eliminated and tension is applied to the dimming cord 32, the dimming cord contact portion 46 slides again against the elastic force of the spring 49 in the slack detecting means 44, Accordingly, the lever portion 48 swings and the interlocking gear 56 is separated from the first gear 52, so that the interlocking between the first gear 52 and the second gear 54 is released, and the first winding drum 24 and The second winding drum 34 can operate independently.

  Thus, in this embodiment, since the interlocking unit 50 performs the interlocking operation based on the slack detection by the slackness detecting unit 44, adjustment according to the product size of the blind is unnecessary, and the assembly is simple. For example, it is not necessary to adjust the attachment positions of the first gear 52 and the second gear 54 for each product size, and the interlocking means 50 can be attached to a common position for blinds of all product sizes.

  Further, when the interlocking gear 56 meshes with the first gear 52, the interlocking gear 56 moves according to the swing of the lever portion 48 and meshes with the gear surface of the first gear 52 from the front, so that the interlocking gear 56 rotates appropriately. Thus, the meshing with the first gear 52 can be completed with certainty.

  Further, since the interlocking gear 56 is always meshed with the second gear 54, the meshing of the first gear 52 and the second gear 54 is achieved by meshing with the first gear 52 while maintaining the meshing with the second gear 54. It can be reliably linked.

  In the above embodiment, the first winding drum 24 and the second winding drum 34 are arranged side by side in the horizontal direction. However, the present invention is not limited to this, and the first winding drum 24 and the second winding drum are arranged. It is also possible to arrange the take-up drum 34 so as to be shifted in the vertical direction. For example, the first winding drum 24 is disposed above the vertical direction and the second winding drum 34 is disposed below, and the first gear 52 and the second gear 54 correspond to each drum as shown in FIG. Can also be shifted in the vertical direction. FIG. 7A shows a state where the interlocking gear 56 swings at a position where the first gear 52 and the second gear 54 do not interlock, and FIG. 7B shows the first gear 52 and the second gear 54. The interlocking gear 56 is oscillating at the position where the In the example of FIG. 7, the same action and effect can be obtained, and the depth dimension of the head box 10 can be reduced.

  In the above embodiment, the two operation chains, that is, the operation chain 30 for operating the lifting / lowering cord 22 and the operation chain 40 for operating the dimming cord 32 are used. However, the present invention is not limited to this. As described above, both the operation cord 22 and the dimming cord 32 can be operated with one operation chain 60. In this example, switching means is provided in the controller unit 42, and by operating the front side of the operation chain 60, the switching means transmits operating force to the first winding shaft 26, and the operation chain 60. By operating the back side, the switching means transmits operating force to the second winding shaft 36. In the example of FIG. 8, the same action and effect can be obtained, and the appearance of the blind can be improved because there are few operation chains.

It is a front view which shows the blind of 1st Embodiment by this invention with the inside of a head box. (A) is a plan view in the vicinity of the drum receiver including the winding drum in a normal state, (b) is a plan view in which the winding drum of the drum receiver is omitted, and (c) is when the dimming cord is loosened. It is the top view which abbreviate | omitted the winding drum of the drum receiver. (A) is AA sectional drawing of Fig.2 (a), (b) is AA sectional drawing equivalent view when a light control cord slacks. FIG. 2A is a cross-sectional view taken along the line BB in FIG. 2A (the gear portion is indicated by a one-dot chain line), and FIG. It is a perspective view which shows a slack detection means and an interlocking gear. (A) is a front view of a blind showing a state in which both the intermediate bar and the bottom rail are in the most lowered position, and (b) is a front view of a brand showing a state in which all the second shielding materials are folded, ( c) is a front view of a blind showing a state in which the intermediate bar is raised together with the bottom rail and a part of the first shielding member is being folded. (a) is sectional drawing which shows the state which the interlocking gear rock | fluctuates in the position where a 1st gear and a 2nd gear do not interlock | cooperate, (b) is the 1st gear 52 and the 2nd gear 54 interlock | cooperating. It is sectional drawing which shows the state which the interlocking gear 56 is rock | fluctuating to the position. It is a front view which shows the blind of 3rd Embodiment with the inside of a head box.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Head box 14 1st shielding material 16 2nd shielding material 18 Intermediate bar 22 Lifting cord 24 First winding drum 32 Dimming cord 34 Second winding drum 44 Slack detecting means 46 Dimming cord contact portion 48 Lever portion 50 Interlocking means 52 First gear 54 Second gear 56 Interlocking gear

Claims (4)

The upper end of the first shielding member (14) is attached to the head box (10), and the upper end of the second shielding member (16) is attached to the intermediate bar (18) attached to the lower end of the first shielding member (14). One end of the lifting / lowering cord (22) hanging down from the head box (10) is attached to the lower end of the second shielding member (16), and the dimming cord (32) hanging down from the head box (10) Is attached to the intermediate bar (18), and the lower end of the second shielding member (16) is raised and lowered by raising and lowering one end of the raising and lowering cord (22). In the blind in which the exposure ratio of the first shielding material (14) and the second shielding material (16) is changed so that the intermediate bar (18) is raised and lowered by moving up and down,
In the head box, the other end of the lifting / lowering cord (22) is connected to be wound and unwound, and the other end of the light control cord (32) is wound and unwound. Second winding drum (34) that can be connected, slack detection means (44) for detecting slack of dimming cord (32), and interlocking means that operates by detecting slack by slack detection means (44) ( 50), and
When the slack detecting means (44) detects the slack of the dimming cord (32), the interlocking means (50) operates to rotate the second winding drum (34) to the rotation of the first winding drum (24). Blinds characterized by interlocking.   The interlocking means (50) includes a first gear (52) that can rotate integrally with the first winding drum (24) and cannot move in the axial direction of the first winding drum (24), and a second winding drum ( 34) and a second gear (54) that cannot move in the axial direction of the second winding drum (34), and an interlocking gear (56) connected to the slack detection means (44). The interlocking gear (56) is movable between a position where the first gear (52) and the second gear (54) are interlocked and a position which is not interlocked via the interlocking gear. The blind according to claim 1.   The slack detection means (44) rotatably supports the interlocking gear (56), and between the position where the first gear (52) and the second gear (54) are interlocked with each other via the interlocking gear. The lever part (48) capable of moving the interlocking gear with the dimming cord (32) abuts, and the lever part (48) is swung by the looseness of the abutting dimming cord (32). The blind according to claim 2, further comprising a dimming cord abutting portion capable of performing the following.   The blind according to claim 2 or 3, wherein the interlocking gear (56) is always kept in mesh with either one of the first gear (52) and the second gear (54).

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