JP5521150B2 - Horizontal blind - Google Patents

Description

  The present invention relates to a horizontal blind in which a lifting / lowering cord is disposed at a position offset from a center portion in the front-rear direction of a slat.

  In horizontal blinds having a large number of aligned slats, a lifting cord for raising and lowering the slats has passed through each slat passing through a lifting cord insertion hole formed in the center of the slat in the front-rear direction. Generally, one end of the lifting / lowering cord is connected to a bottom rail provided below the slat and the slat is lifted / lowered by lifting / lowering the bottom rail with the lifting / lowering cord.

  On the other hand, a horizontal blind shown in Patent Document 1 is known as an elevator cord disposed at a position offset from the central portion of the slat in the front-rear direction.

  In the horizontal blind shown in Patent Document 1, at least one lifting / lowering cord is positioned on one side in the front-rear direction of the horizontal blind, and the other lifting / lowering cord is positioned on the opposite side in the front-rear direction of the horizontal blind. The cords are attached to the vertical cords of the ladder cords, inserted through the loops extending from the vertical cords, and one end is connected to the bottom rail. Also, the other end of the lifting / lowering cord is guided to one end in the longitudinal direction by a guide roller or the like in the head box and led out to the outside through a stopper device. The lifting / lowering cord led out from the head box is pulled down. By operating, the bottom rail rises, and the slats are folded in order from the bottom by this bottom rail. On the other hand, by operating the lifting cord to release the stopper device, the bottom rail and slats are lowered by their own weight. It is supposed to be.

  Thus, in the thing of patent document 1, since the raising / lowering cord is located in the side edge part of a slat and the hole which the raising / lowering cord penetrates is not formed in a slat, the light leakage at the time of shielding can be prevented. In addition, the bottom rail can be prevented from being tilted by disposing the lifting cords in the front-rear direction.

Japanese Utility Model Publication 3-35034

  However, in the horizontal blind described in Patent Document 1, the other end of the lifting / lowering cord led out from the head box is directly operated to raise / lower the slat. The operation of pulling down the other end must be performed until the slat is folded into a desired position, and there is a problem that it is difficult to apply it to a product having a large product size and a heavy weight.

  The present invention is for solving such a problem, and in the case where the lifting / lowering cord is disposed at a position offset from the center portion in the front-rear direction of the slat, the operation load of the lifting / lowering cord for lifting the slat is reduced. It is an object of the present invention to provide a horizontal blind that can be used.

In order to achieve the above-described object, the invention described in claim 1 includes a rotating shaft that is rotatably supported in the head box, a plurality of ladder cords that tilt in conjunction with rotation of the rotating shaft, and a ladder cord. A plurality of slats that are supported in an aligned state and a plurality of elevating cords that are suspended from the head box and can raise and lower the slats, and the elevating cords are disposed at positions offset from the center of the slat in the front-rear direction. In horizontal blinds,
It has a plurality of lifting drums that rotate in conjunction with the rotation of the rotating shaft, and one end of the lifting cord is connected to the lifting drum so that it can be wound and unwound.
At least one lifting cord is introduced into the head box from the front side in the front-rear direction of the head box, and another lifting cord is introduced from the rear side in the front-rear direction of the head box into the head box,
The front lifting cord introduced into the head box from the front side and the rear lifting cord introduced from the rear side into the head box are connected to the lifting drum so that the winding direction is reversed, The elevating drum to which the elevating cord on either side is connected is provided with a reverse rotation mechanism that transmits the rotational force in the direction opposite to the rotation direction of the rotary shaft to the elevating drum. It is characterized by winding the lifting cord all at once.

  According to a second aspect of the present invention, in the horizontal blind according to the first aspect, the lifting drum of the front lifting cord and the lifting drum of the rear lifting cord rotate in opposite directions to each lifting drum. The lifting / lowering cord is wound in a mirror image form.

According to a third aspect of the present invention, there is provided a rotary shaft that is rotatably supported in the head box, a plurality of ladder cords that are tilted in conjunction with rotation of the rotary shaft, and a plurality of slats that are supported in alignment with the ladder cords. A horizontal blind, wherein the lifting cord is suspended from the head box and is capable of raising and lowering the slat, and the lifting cord is disposed at a position offset from the front-rear center of the slat.
It has a plurality of lifting drums that rotate in conjunction with the rotation of the rotating shaft, and one end of the lifting cord is connected to the lifting drum so that it can be wound and unwound.
At least one lifting / lowering cord is introduced into the head box from the front side in the front / rear direction of the head box, and another lifting / lowering cord is introduced into the head box from the rear side in the front / rear direction of the head box,
The elevating drum to which the elevating cord on at least one of the front and rear sides is connected is located at a position where the axis of the elevating drum is offset from the axis of the rotating shaft, and the rotation transmission mechanism transmits the rotation of the rotating shaft. The elevating drums wind up the elevating cords simultaneously by rotating the shaft.

  According to a fourth aspect of the present invention, in the horizontal blind according to the third aspect, the lifting drum of the front lifting cord and the lifting drum of the rear lifting cord rotate in the same direction to each lifting drum. The lifting / lowering cord is wound up in the same form.

  According to a fifth aspect of the present invention, in the horizontal blind according to the third aspect, the lifting drum of the front lifting cord and the lifting drum of the rear lifting cord rotate in opposite directions to each other. The lifting / lowering cord is wound in a mirror image form.

  According to the present invention, by allowing the lifting / lowering cord introduced into the headbox from the front / rear direction of the headbox to be wound around the lifting / lowering drum, the operation load is reduced because the lifting / lowering cord is not directly operated. Therefore, it can be applied to a product having a large product size and heavy weight. Further, the elevating drum can be rotated by electrically rotating the rotating shaft.

  In addition, since the lifting / lowering cord is introduced from a different position in the front / rear direction of the head box, the lifting / lowering cord can be disposed at a position offset from the central portion of the slat in the front / rear direction, and at the time of lifting / lowering, The entire slat can be balanced.

It is a front view which shows the slat horizontal and fully open state of the horizontal blind concerning 1st Embodiment of this invention. It is a front view which shows the slat full closed state of the horizontal blind which concerns on 1st Embodiment of this invention. It is a top view which shows the inside of the head box which concerns on 1st Embodiment. It is a fragmentary sectional view of the raising / lowering drum which incorporated the reverse rotation mechanism. It is AA sectional drawing of FIG. (A) is a sectional side view of the vicinity of the first lifting drum of the first embodiment, and (b) is a sectional side view of the vicinity of the second lifting drum. (A) of the horizontal blind at the first elevating drum arrangement position of the first embodiment is a side sectional view showing a slat horizontal and fully open state, (b) is a side sectional view showing a slat fully closed state, and (c) is a reverse direction. It is a sectional side view which shows the slat fully closed state rotated in the direction. (A) of the horizontal blind at the second lifting drum arrangement position of the first embodiment is a side sectional view showing the slat horizontal and fully open state, (b) is a side sectional view showing the slat fully closed state, and (c) is the reverse direction. It is a sectional side view which shows the slat fully closed state rotated in the direction. It is a front view showing the state where the slat of the horizontal blind concerning a 1st embodiment of the present invention was folded up to the halfway position in the up-and-down direction. It is a front view which shows the slat horizontal and fully open state of the horizontal blind concerning 2nd Embodiment of this invention. It is an expanded sectional side view of the interlocking gear part of 2nd Embodiment. (A) of 2nd Embodiment is a sectional side view of the 1st raising / lowering drum vicinity, (b) is a sectional side view of the 2nd raising / lowering drum vicinity.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(First embodiment)
1 to 9 show a first embodiment of the present invention.

  An endless operation cord 14 hangs from one end of the head box 10 fixed to the window frame or the like by the bracket 11. The operation cord 14 is wound around a pulley 15 disposed in the head box 10 and can be driven to rotate. The rotation of the pulley 15 can be transmitted to the rotary shaft 12 rotatably supported in the head box 10 via a clutch. The clutch prevents rotation from the rotating shaft 12 and transmits only the rotation from the pulley 15 to the rotating shaft 12. Three elevating drums 20 and a rotating drum 42 that rotate in conjunction with the rotation of the rotating shaft 12 are provided on the rotating shaft 12 at intervals in the left-right direction of the head box 10.

  A ladder cord 16 hangs down from the rotary drum 42 below the head box 10. Each ladder cord 16 is installed between the front and rear vertical cords 16a and 16b that hang down at a predetermined interval in the front-rear direction of the head box 10, and the front and rear vertical cords 16a and 16b at a predetermined interval in the vertical direction. And the middle cord 16c. Each middle cord 16c further comprises a pair of upper and lower cords that are slightly separated from each other. The upper ends of the vertical cords 16a and 16b before and after each ladder cord 16 are connected to the rotating drum 42 so as to follow rotation within a predetermined range angle, and the rotating shaft 12 is inserted into the rotating drum 42 so as not to be relatively rotatable. Yes.

  The ladder cord 16 supports a large number of slats 18 in an aligned state by inserting the slats 18 between the upper and lower cords of each middle cord 16c. The lower ends of the vertical cords 16a and 16b of the ladder cord 16 are at the lowermost step. It is fixed to the bottom rail 24 arranged below the slat 18 located in the position. Preferably, the vertical relationship of the upper and lower cords of each middle cord 16c is reversed to form a pair of crossing portions, and the slats 18 are inserted between the pair of crossing portions.

  One end of the lifting / lowering cord 22 is connected to each lifting / lowering drum 20 so that winding / unwinding is possible. The other end of the lifting / lowering cord 22 hangs down from the head box 10, passes through a position offset from the center portion in the front-rear direction of the slat, and is connected to the bottom rail 24.

  The elevating drum 20 includes a drum portion 26 in which one end of the elevating cord 22 is connected so as to be wound and unwound, and a drum receiver 28 that rotatably supports the drum portion 26 and is fixed to the head box 10. .

  Ladder cord guide portions 28a and 28b for restricting the front and rear vertical cords 16a and 16b to pass through the drum receiver 28 and to prevent the front and rear vertical cords 16a and 16b from opening in the front-rear direction by a predetermined amount or more. Is formed. Also, a first lifting / lowering cord guide portion that guides the distribution of the lifting / lowering cord 22 while the lifting / lowering cord 22 is inserted outside the ladder cord guide portions 28a and 28b of the drum receiver 28 in the front / rear direction of the head box 10. 28c and the 2nd raising / lowering cord guide part 28d are each formed. The lifting / lowering cord guide portions 28c and 28d can surely suspend the lifting and lowering cord 22 to a position offset from the center of the slat 18 in the front-rear direction, and the ladder cord guide portions 28a and 28b cannot force the ladder cord 16. The lifting / lowering cord 22 can be disposed at a position offset from the central portion in the front-rear direction of the slat 18 without applying any force. Even when the diameter of the elevating drum 20 is large, the ladder cord guide portions 28a and 28b can narrow the interval between the vertical cords 16a and 16b before and after the ladder cord 16 to improve the rotation of the slats 18.

  Below, arrangement | positioning of the three raising / lowering drums 20, distribution of the three raising / lowering cords 22, and the connection to each raising / lowering drum 20 are demonstrated.

  The lifting / lowering cord 22 disposed inside the center in the left-right direction of the head box 10 is connected to the lifting / lowering drum 20 like the first lifting / lowering cord 22a and the first lifting / lowering drum 20a shown in FIGS. It has become.

  As shown in FIG. 6A, the first elevating cord 22a is arranged along the front vertical cord 16a among the front and rear vertical cords 16a and 16b, and is connected to each middle cord 16c of the vertical cord 16a. The loop-shaped part 16d which protrudes further forward from the part is inserted. One end of the first lifting / lowering cord 22a is introduced into the head box 10 via the first lifting / lowering cord guide portion 28c on the front side of the drum receiver 28 of the first lifting / lowering drum 20a, and then the first lifting / lowering cord 22a is inserted into the first drum portion 26a. 6 (a) It is connected so as to be wound up by rotation in the middle clockwise direction. The rotary shaft 12 is inserted into the first drum portion 26a so as to be relatively rotatable.

  On the other hand, the lifting / lowering cord 22 arranged on the outer side in the left-right direction of the head box 10 and the connection to the lifting / lowering drum 20 are connected to the second lifting / lowering cord 22b and the second lifting / lowering drum 20b shown in FIGS. It is like that.

  As shown in FIG. 6 (b), the second elevating cord 22b is arranged along the rear vertical cord 16b among the front and rear vertical cords 16a and 16b, and is connected to each middle cord 16c of the vertical cord 16b. A loop-shaped portion 16e protruding further rearward from the connecting portion is inserted. One end of the second lifting / lowering cord 22b is introduced into the head box 10 via the second lifting / lowering cord guide portion 28d on the rear side of the drum receiver 28 of the second lifting / lowering drum 20b, and then the second lifting / lowering cord 22b is inserted into the second drum portion 26b. It is connected so that it may be wound up by rotation in the counterclockwise direction in FIG. The rotary shaft 12 is inserted into the second drum portion 26b so as not to be relatively rotatable.

  Further, only the first lifting drum 20a is provided with a reverse rotation mechanism 30 as shown in FIGS. As shown in FIG. 4, the reverse rotation mechanism 30 is provided between the first drum portion 26 a and the rotary drum 42, and rotates in the direction opposite to the rotation direction of the rotary shaft 12 to the first drum portion 26 a. introduce.

  Specifically, a casing 31 of a reverse rotation mechanism 30 that is relatively rotatable with respect to these and fixed to the head rail 10 is disposed in an internal space of a connection portion between the first drum portion 26a and the rotary drum 42. ing.

  In the casing 31, a first gear 32 that rotates integrally with the rotary shaft 12, a second gear 34 that meshes with the first gear 32, and a third gear that is integrally formed at a position axially separated from the second gear. A gear 36, a fourth gear 38 that meshes with the third gear, and a fifth gear 40 that meshes with the fourth gear 38 and rotates integrally with the first drum portion 26a are disposed, and the second gear 34 and the third gear 34 are arranged. The gear 36 is rotatably supported by the casing 31.

  When the rotating shaft 12 is driven to rotate, rotation in the same direction as the rotating shaft 12 is transmitted to the first gear 32, and rotation in the opposite direction to the rotating shaft 12 is transmitted to the second gear 34 that meshes with the first gear 32. . Since the third gear 36 integrated with the second gear 34 rotates in the direction opposite to the rotation shaft 12, rotation in the same direction as the rotation shaft 12 is transmitted to the fourth gear 38 that meshes therewith. Accordingly, since the rotation in the direction opposite to the rotation shaft 12 is transmitted to the fifth gear 40 that meshes with the fourth gear 38, the first drum portion 26 a always rotates in the direction opposite to the rotation shaft 12.

  Since the second drum portion 26b of the second elevating drum 20b is configured to rotate integrally with the rotary shaft 12, the first drum portion 26a and the second drum portion 26b are mutually rotated by the rotation of the rotary shaft 12. It will rotate in the opposite direction.

  Next, the operation of the horizontal blind according to the first embodiment will be described.

  First, in order to rotate the slat 18 shown in FIG. 1 from the horizontal fully opened state to the fully closed state shown in FIG. 2, an operation of pulling down the rear side of the operation cord 14 is performed to rotate the pulley 15 and rotate the rotating shaft 12. Is rotated clockwise in FIGS. 7 (a) and 8 (a). As a result, the rotating drum 42 rotates integrally with the rotating shaft 12, and as shown in FIGS. 7B and 8B, the rear vertical cord 16b is lowered and the front vertical cord 16a is raised. Then, the ladder cord 16 tilts and each slat 18 tilts, so that the slat 18 can be fully closed.

  Alternatively, as shown in FIG. 1, the pulley 15 is driven to rotate by operating the slat 18 to pull down the front side of the operation cord 14 from the horizontal fully opened state, so that the rotary shaft 12 is rotated as shown in FIGS. 7 (a) and 8 (a). It can also be rotated counterclockwise. As a result, the rotating drum 42 rotates integrally with the rotating shaft 12, and as shown in FIGS. 7C and 8C, the rear vertical cord 16b rises and the front vertical cord 16a falls. Then, the ladder cord 16 tilts and each slat 18 tilts, so that the slat can be fully closed.

  When the slat 18 is raised, if the operation of pulling down the front side of the operation cord 14 is continued, the rotary shaft 12 continues to rotate counterclockwise in FIGS. 7 and 8, and the second drum portion 26b is moved to FIG. ) Rotate counterclockwise to wind up the second lifting / lowering cord 22b. Since the first drum portion 26a rotates in the clockwise direction in FIG. 7C via the reverse rotation mechanism 30, the first lifting / lowering cord 22a is wound up. In this manner, the first lifting / lowering cord 22a and the second lifting / lowering cord 22b are wound all at once, and the bottom rail 24 is raised, so that the slat 18 can be folded and raised from below.

  Then, as shown in FIG. 9, when the fully closed slat 18 folded to a middle position in the vertical direction is lowered, an operation of pulling down the rear side of the operation cord 14 is performed to rotate the pulley 15 to rotate the slat. By continuing the operation of continuously pulling down the rear side of the operation cord 14 after the ladder 18 is reversed and fully closed, and the ladder cord 16 cannot follow the further rotation, the rotary shaft 12 is moved to the position shown in FIG. And since it continues to rotate clockwise in FIG. 8, the second drum portion 26b rotates clockwise in FIG. 8 (b) and unwinds the second lifting / lowering cord 22b. On the other hand, the first drum portion 26a unwinds the first lifting / lowering cord 22a because the first drum portion 26a rotates counterclockwise in FIG. 7B via the reverse rotation mechanism 30. Thus, the first lifting / lowering cord 22a and the second lifting / lowering cord 22b are unrolled all at once, the bottom rail 24 is lowered, and the slat 18 can be lowered.

  Thus, the lifting / lowering cord 22 can be disposed at a position offset from the center in the front-rear direction of the slat 18, and when the first lifting / lowering cord 22a and the second lifting / lowering cord 22b are wound or unwound, Since the first lifting / lowering cord 22a and the second lifting / lowering cord 22b are mirror images of the first drum portion 26a and the second drum portion 26b, the slats can be lifted and lowered.

  Since the lifting / lowering cord 22 is disposed along the vertical cords 16a and 16b of the ladder cord 16, it is not necessary to provide the lifting / lowering cord insertion hole in the slat 18, and light leakage when the slat is fully closed can be prevented.

  Moreover, since all the raising / lowering drums 20 are arrange | positioned coaxially, the structure in a head box is simplified and it can accommodate compactly.

  Moreover, since each raising / lowering cord 22a and 22b can be hung from the 1st drum part 26a and the 2nd drum part 26b, respectively, and can arrange | position along the ladder cord 16, the load to the raising / lowering code 22 is reduced. Therefore, it can be operated with a lighter operating load, and the durability of the product is improved.

(Second Embodiment)
Next, a second embodiment will be described with reference to FIGS.

  In 2nd Embodiment, the same code | symbol is attached | subjected to the same member as 1st Embodiment, only the structure different from 1st Embodiment is demonstrated, and description is abbreviate | omitted about the same structure.

  In the second embodiment, a transmission shaft 56 that is parallel to the rotation shaft 12 and is rotatably supported in the head box 10 is provided in the head box 10 above the rotation shaft 12.

  The second elevating drum 20b is provided on the rotating shaft 12 in the same manner as in the first embodiment, and the first elevating drum 20a is provided on the transmission shaft 56. Here, the reverse rotation mechanism 30 is not provided in the 1st raising / lowering drum 20a, and the transmission shaft 56 is penetrated by the 1st drum 26a so that relative rotation is impossible.

  The rotating shaft 12 and the transmission shaft 56 are connected by an interlocking gear portion 50 provided between the pulley 15 and the second elevating drum 20b adjacent thereto.

  As shown in FIG. 11, the interlocking gear portion 50 meshes with the first interlocking gear 52 and the first interlocking gear 52 inserted so that the rotating shaft 12 rotates integrally, and the transmission shaft 56 rotates integrally. The first interlocking gear 52 and the second interlocking gear 54 are arranged in the vertical direction.

  Since the rotating shaft 12 and the first interlocking gear 52 rotate integrally, and the transmission shaft 56 and the second interlocking gear 54 rotate integrally, the rotation direction of the rotating shaft 12 is the second interlocking gear that meshes with the first interlocking gear 52. The rotation is reversed by 54 and transmitted to the transmission shaft 56.

  Next, the operation of the horizontal blind according to the second embodiment will be described.

  First, as shown in FIG. 10, in order for the slat 18 to rotate from the horizontal fully open state to the fully closed state, the pulley 15 is driven to rotate by pulling down the rear side of the operation cord 14, and the rotary shaft 12 is rotated. 11 Rotate clockwise. As the rotary shaft 12 rotates in this way, each rotary drum 42 rotates clockwise together with the rotary shaft 12 to raise the front vertical cord 16a and lower the rear vertical cord 16b. The slat 18 is inclined and is fully closed.

  Alternatively, an operation of pulling down the front side of the operation cord 14 is performed to rotate the pulley 15 and rotate the rotating shaft 12 counterclockwise in FIG. As the rotary shaft 12 rotates in this way, each rotary drum 42 rotates counterclockwise integrally with the rotary shaft 12 so that the rear vertical cord 16b rises and the front vertical cord 16a lowers. The slats 18 are inclined and are fully closed.

  Then, even after the slat 18 is fully closed and the ladder cord 16 cannot follow any further rotation, the operation of continuously pulling down the front side of the operation cord 14 is continued, so that the rotating shaft 12 in FIG. Since the second drum portion 26b rotates counterclockwise in FIG. 12B because the counterclockwise rotation continues, the first drum portion 26a is actuated by the interlocking gear portion 50, so that the middle clock in FIG. Rotating in the direction, each winds up the second lifting / lowering cord 22b and the first lifting / lowering cord 22a all together. Thereby, the bottom rail 24 rises and the slat 18 can be folded and raised from below.

  On the other hand, when lowering the slat 18, the operation of pulling the rear side of the operation cord 14 is performed to rotate the pulley 15 and rotate the rotary shaft 12 in the clockwise direction in FIG. As a result, the first interlocking gear 52 rotates in the clockwise direction integrally with the rotary shaft 12. Then, even after the slat 18 is fully closed and the ladder cord 16 cannot follow any further rotation, the operation of continuously pulling down the rear side of the operation cord 14 is continued, so that the rotary shaft 12 is moved to FIG. Since the second drum portion 26b rotates in the clockwise direction in FIG. 12 (b) in order to continue to rotate in the clockwise direction, the first drum portion 26a is actuated by the interlocking gear portion 50, and the counterclockwise in FIG. 12 (a). Rotating in the direction, each unwinds the second lifting / lowering cord 22b and the first lifting / lowering cord 22a all at once. Thereby, the bottom rail 24 descends and the slat 18 can be lowered.

  Also in the second embodiment, the lifting cords 22a and 22b can be suspended from the first drum portion 26a and the second drum portion 26b substantially straight and arranged along the ladder cord 16, so that the lifting cord 22 As a result, the durability of the product is improved.

  Since the first drum portion 26a and the second drum portion 26b have the same action except for the shafts to be connected, they can be configured with the same parts, so the types of parts are reduced and the cost is reduced. be able to.

  In the second embodiment, the first elevating drum 20 a can be provided on the rotating shaft 12 and the second elevating drum 20 b can be provided on the transmission shaft 56. In this case, only the rotation direction of the drum portion when raising and lowering the slat 18 is reversed from the above, and the other operations are the same.

  As described above, in the second embodiment, since the first elevating cord 22a and the second elevating cord 22b are wound around the first drum portion 26a and the second drum portion 26b in a mirror image form, the slats are balanced. Can be moved up and down.

(Other embodiments)
In the first embodiment, the first elevating drum 20a and the second elevating drum 20b are coaxially provided on the rotating shaft 12, and in the second embodiment, the second elevating drum 20b and the first elevating drum are provided on the rotating shaft 12. Although either one of 20a was provided coaxially, it is not restricted to this and various deformation | transformation are possible.

  For example, the first elevating drum 20a and the second elevating drum 20b are arranged in parallel to the front and rear of the rotating shaft 12 with the rotating shaft 12 therebetween, and the rotating shaft 12, the first elevating drum 20a, and the second elevating drum 20b are arranged. May be connected via the interlocking gear portion 50 shown in the second embodiment, respectively, so that the first drum portion 26a and the second drum portion 26b are always rotated in the same direction. The first lifting / lowering drum 20a is disposed on the front side of the second lifting / lowering drum 20b, the first lifting / lowering cord 22a is disposed along the front vertical cord 16a, and one end of the first lifting / lowering cord 22a is connected to the first lifting / lowering cord 22a. After being introduced into the head box 10 via the code guide 28c, it is connected to the first drum portion 26a. The second lifting / lowering cord 22b is arranged along the rear vertical cord 16b, and one end of the second lifting / lowering cord 22b is introduced into the head box 10 via the second lifting / lowering cord guide 28d. , Connected to the second drum portion 26b. The first lifting / lowering cord 22a and the second lifting / lowering cord 22b are connected to the first drum portion 26a and the second drum portion 26b, respectively, so as to be wound in the same rotational direction.

  For this reason, when the 1st drum part 26a and the 2nd drum part 26b rotate in the same direction, the 1st raising / lowering cord 22a and the 2nd raising / lowering cord 22b are with respect to the 1st drum part 26a and the 2nd drum part 26b. It will be wound up in the same form.

  In the above embodiment, the rotary shaft 12 is configured to be manually driven to rotate. However, the present invention is not limited to this configuration, and the rotary shaft 12 is connected to an electric motor to be driven to rotate electrically. It can also be. By using an electric motor in this way, manual operation can be made unnecessary, and for blinds and the like that are in an installation position where they cannot be easily reached such as high places where electric operation is difficult. Can also be applied.

  Further, in the above embodiment, the lifting / lowering cord is arranged outside the side edge of the slat and along the ladder cord, so that the lifting / lowering cord insertion hole of the slat is omitted, but the present invention is not limited to this. The present invention can also be applied to the case where a plurality of lifting / lowering cord insertion holes are provided at positions offset from the front / rear direction center and the lifting / lowering cords are disposed in the lifting / lowering cord insertion holes. Further, instead of arranging the lifting / lowering cord along the ladder cord, it is also possible to provide a notch on the side edge of the slat and to arrange the lifting / lowering cord along the wall surface of the notch.

DESCRIPTION OF SYMBOLS 10 Head box 12 Rotating shaft 16 Ladder cord 18 Slat 20 Lifting drum 20a First lifting drum (lifting drum)
20b Second elevating drum (elevating drum)
22 Lift code 22a First lift code (lift code)
22b Second elevating cord (elevating cord)
30 Reverse rotation mechanism 50 Interlocking gear part (rotation transmission mechanism)

Claims (5)

A rotary shaft (12) rotatably supported in the head box (10), a plurality of ladder cords (16) tilting in conjunction with rotation of the rotary shaft, and a number of ladder cords supported in alignment with the ladder cords A horizontal type comprising a slat (18) and a plurality of elevating cords (22) suspended from the head box and capable of elevating and lowering the slats, wherein the elevating cords are disposed at positions offset from the center of the slat in the front-rear direction In the blinds
A plurality of elevating drums (20) that rotate in conjunction with rotation of the rotation shaft are provided, and one end of the elevating cord is coupled to the elevating drum so as to be wound and unwound,
At least one lift cord (22a) is introduced into the head box from the front side in the front-rear direction of the head box, and another lift cord (22b) is introduced from the rear side in the front-rear direction of the head box into the head box,
The front lifting cord introduced into the head box from the front side and the rear lifting cord introduced from the rear side into the head box are connected to the lifting drum so that the winding direction is reversed, The elevating drum to which the elevating cord on either side is connected is provided with a reverse rotation mechanism (30) that transmits a rotational force in a direction opposite to the rotation direction of the rotary shaft to the elevating drum. A horizontal blind characterized in that the lifting drum winds the lifting cord all at once.   When the lifting drum (20a) of the front lifting / lowering cord (22a) and the lifting drum (20b) of the rear lifting / lowering cord (22b) rotate in opposite directions, each lifting drum is mirror-imaged. The horizontal blind according to claim 1, wherein the elevating cord is wound up. A rotary shaft (12) rotatably supported in the head box (10), a plurality of ladder cords (16) tilting in conjunction with rotation of the rotary shaft, and a number of ladder cords supported in alignment with the ladder cords A horizontal type comprising a slat (18) and a plurality of elevating cords (22) suspended from the head box and capable of elevating and lowering the slats, wherein the elevating cords are disposed at positions offset from the center in the front-rear direction of the slats In the blinds
A plurality of elevating drums (20) that rotate in conjunction with rotation of the rotation shaft are provided, and one end of the elevating cord is coupled to the elevating drum so as to be wound and unwound,
At least one lift cord (22a) is introduced into the head box from the front side in the front-rear direction of the head box, and another lift cord (22b) is introduced from the rear side in the front-rear direction of the head box into the head box,
The lifting drum to which the lifting code on at least one of the front and rear sides is connected is located at a position where the axis of the lifting drum is offset from the axis of the rotation shaft, and the rotation transmission mechanism (50) transmits the rotation of the rotation shaft. The horizontal blind is characterized in that each lifting drum winds the lifting cord all at once by the rotation of the rotating shaft.   The lifting / lowering cord of the front lifting / lowering cord and the lifting / lowering drum of the rearward lifting / lowering cord rotate in the same direction so that the lifting / lowering cord is wound in the same form on each lifting / lowering drum. Item 4. The horizontal blind according to Item 3.   The lifting / lowering cord of the front lifting / lowering cord and the lifting / lowering drum of the rearward lifting / lowering cord rotate in opposite directions, whereby the lifting / lowering cord is wound around each lifting / lowering drum in a mirror image form. Item 4. The horizontal blind according to Item 3.

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