JP5015353B2 - 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, the horizontal blind shown in Patent Document 1 and Patent Document 2 is known as an elevator cord disposed at a position offset from the center in the front-rear direction of the slat.

  In the horizontal blind shown in Patent Document 1, a side edge notch is formed in each slat to engage the vertical code on both sides of the ladder cord, and positioning in the longitudinal direction of the slat is achieved by engaging both the vertical code and the notch. The at least one lifting / lowering cord is positioned on one side of the horizontal blind, and the other lifting / lowering cord is positioned on the opposite side of the horizontal blind, and these lifting / lowering cords are also ladder codes. Are connected to the bottom rail and inserted into loops extending from the vertical cord, respectively, 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.

  Further, the horizontal blind shown in Patent Document 2 is configured with two cords parallel to the top and bottom of the ladder-like support cord, and at the side edge of the position supported by the ladder-like support cord of the slat, When a substantially U-shaped notch is provided and the slats are supported by the middle cord portion of the ladder-like support cord, the upper and lower two cords of the middle cord portion are reversed in the vertical relationship, and the cords are crossed at both ends of the middle cord portion. The crossing part is engaged with a U-shaped notch provided in the slat, and an elevating cord for raising and lowering the slat is attached to the vertical cord part of the ladder-like support cord on one outer side of the slat. It is set.

  As a result, in the slat in which the hole for inserting the lifting / lowering cord is not formed, the slat is held by the middle cord crossed up and down and the middle cord is formed in the U-shaped notch formed on both side edges of the slat. Since the crossing portion is engaged, the horizontal movement of the slat can be restricted.

Japanese Utility Model Publication 3-35034 Japanese Utility Model Publication No. 4-40396

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

  Moreover, in the horizontal blind of patent document 2, there exists a possibility that the notch of a slat and an intermediate | middle code | cord | chord may disengage, and there exists a problem that a shift | offset | difference cannot be reliably prevented in the horizontal direction of a slat in that case.

  The present invention is for solving such problems, and a first object is to operate the lifting / lowering cord for lifting / lowering the slat by arranging the lifting / lowering cord at a position offset from the central portion in the front-rear direction of the slat. It is to provide a horizontal blind that can reduce the load.

  In addition to the first object, a second object is to provide a horizontal blind that can surely prevent a slat from shifting.

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. In a horizontal blind comprising a plurality of slats supported in an aligned state and a plurality of lifting cords capable of raising and lowering the slats, wherein the lifting cords are disposed at positions offset from the longitudinal center of the slats.
A plurality of elevating drums that rotate in conjunction with the rotation of the rotating shaft are provided, and one end of the elevating cord is connected to the elevating drum so as to be wound and unwound,
At least one lifting cord is introduced into the head box from one side in the front-rear direction of the head box, and another lifting cord is introduced into the head box from the other side in the front-rear direction of the head box,
Are notch on the side edges to form a slat, at least one notch, lift cords are disposed so as to pass through between the hand of the front and rear vertical cord notch and ladder cord The notch through which the lifting / lowering cord is inserted between the vertical cord and the vertical cord is located only on one side edge of the slat, and when the slat is raised, it faces upward and the slat is lowered. Is characterized by facing downwards of the sloping slats.

  According to a second aspect of the present invention, in the horizontal blind according to the first aspect, there is further provided an elevating cord guide portion for hanging the elevating cord to a position offset from the center portion in the front-rear direction of the slat.

  According to a third aspect of the present invention, in the horizontal blind according to the first or second aspect, the lifting / lowering cords other than the lifting / lowering cords inserted between the notches and the vertical cords are arranged on the outer side edges of the slats before and after the ladder cords. It is characterized by being arranged along the vertical cord.

According to a fourth aspect of the present invention, in the horizontal blind according to any one of the first to third aspects, at least three lifting drums are arranged in the left-right direction of the head box,
Lifting cords that are introduced into the head box from one side in the front-rear direction of the head box in the front and rear direction of the head box and are turned toward the other side via the lifting code guide portion are connected to the left and right outer lifting drums,
The at least one inner elevating drum is connected to an elevating cord introduced into the head box from the other side in the front-rear direction of the head box and guided upward through the elevating cord guide portion. .

According to a fifth aspect of the present invention, in the horizontal blind according to any one of the first to third aspects, at least three lifting drums are arranged in the left-right direction of the head box,
The at least one inner elevating drum is connected to an elevating cord introduced into the head box from one side in the front-rear direction of the head box and turned toward the other side via the elevating cord guide part,
The lifting drum on the left and right outer sides is connected to a lifting cord introduced into the head box from the other side in the front-rear direction of the head box and guided upward through the lifting code guide portion.

  According to the present invention, the lifting / lowering cord introduced from different positions in the front / rear direction of the head box can be wound and unwound by the lifting / lowering drum, thereby manually rotating the rotary shaft for driving the lifting / lowering drum. Since the operation load is reduced as compared with the case where the lifting / lowering cord is directly pulled down, the present invention can be applied to a blind having a large product size and a heavy weight.

  Further, the elevating drum can be rotated by electrically rotating the rotating shaft. In this case, it is not necessary to manually wind and unwind the lifting / lowering cord on the lifting / lowering drum, so that the operation becomes easy, and it is difficult to manually operate the mounting position where it is difficult to reach. It can also be applied to certain blinds.

  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.

  Further, by disposing the lifting / lowering cord so as to pass between the notch and the vertical cord, the lifting / lowering cord can be easily engaged with the notch, and the slat can be prevented from shifting in the horizontal direction.

  Also, when the slats are raised, the slats are tilted and lifted so that the notches are directed upward, and when the slats are lowered, the slats are tilted and lowered so that the notches are directed downwards, so that when the slats are lifted, the slats are raised and lowered. There is no fear that the cord and the rudder coat will enter together or get caught at the corner of the notch, and a smooth lifting operation can be performed.

  According to the second aspect of the present invention, by having the lifting / lowering cord guide portion, the lifting / lowering cord can be reliably suspended at a position offset from the center portion in the front-rear direction of the slat.

  According to the invention described in claim 3, the lifting / lowering cords other than the lifting / lowering cord inserted between the notch and the vertical cord are arranged along the vertical cords before and after the ladder cord on the outer side edge of the slat. Thus, the slat can be easily inserted during assembly.

  According to the fourth aspect of the present invention, since the elevating cord is guided upward via the elevating cord guide portion, the inner elevating drum can be less likely to be loaded. With horizontal blinds, the traction force required to raise and lower the bottom rail without tilting to the left and right tends to be greater on the inner lifting drum than the left and right outer lifting drums, By connecting the lifting / lowering cords arranged so that it is difficult to apply a load to the lifting / lowering drum, the load on the lifting / lowering cords can be distributed in a well-balanced manner, and the durability as a product can be improved.

  According to the invention of claim 5, when the notch is formed on the left and right side edges of the slat and the lifting / lowering cord is inserted between the notch and the vertical cord, The slats are tilted and raised so that the notch faces upward, and when the slat is lowered, the slats are tilted and lowered so that the notch faces downward, so that the lifting cord and ladder cord together with the notch when raising and lowering the slat There is no risk of problems such as entering into the corners or being caught at the corners of the notches, and a smooth lifting operation can be performed.

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. (A) is a sectional side view of the first lifting drum portion when the slat is horizontally and fully opened according to the first embodiment, and (b) and (c) are the first when the slat is fully closed and lifted according to the first embodiment. It is side sectional drawing of the 1 raising / lowering drum part. (A) is a sectional side view of the second lifting drum part when the slat is horizontal according to the first embodiment, and (b) and (c) are the second lifting and lowering when the slat is fully closed and lifted according to the first embodiment. It is a sectional side view of a drum part. It is a partial sectional side view of the head box vicinity showing the 1st raising / lowering drum which concerns on 1st Embodiment. It is a fragmentary sectional side view of the head box vicinity showing the 2nd raising / lowering drum which concerns on 1st Embodiment. It is front explanatory drawing of the horizontal blind which shows the space | interval of each ladder code and a raising / lowering cord. It is front explanatory drawing of the horizontal blind at the time of the raising / lowering stop of the bottom rail which concerns on 1st Embodiment. It is a top view which shows the inside of the head box which concerns on 1st Embodiment. It is a fragmentary top view which shows the state of the raising / lowering cord of the 1st Embodiment, a ladder cord, and a notch part. It is a front view which shows the slat horizontal and full open state of the horizontal blind which concerns on 2nd Embodiment. It is a front view which shows the slat full closed state of the horizontal blind which concerns on 2nd Embodiment. (A) is a sectional side view of the first elevating drum portion when the slat is horizontally and fully opened according to the second embodiment, and (b) and (c) are the first when the slat is fully closed and elevated according to the second embodiment. It is side sectional drawing of the 1 raising / lowering drum part. (A) is side sectional drawing of the 2nd raising / lowering drum part at the time of horizontal slat horizontal opening and fully opening which concerns on 2nd Embodiment, (b), (c) is the 1st at the time of slat fully closed and raising / lowering which concerns on 2nd Embodiment. It is a sectional side view of 2 raising-lowering drum parts. It is a top view which shows the state of the raising / lowering cord of the 2nd Embodiment, a ladder cord, and a notch part. (A) is a fragmentary perspective view which shows the mode of the notch part vicinity in the state where the slat concerning 2nd Embodiment is a horizontal state, (b) is a part which shows the mode of the notch part vicinity at the time of slat descent concerning 2nd Embodiment It is a perspective view, (c) is a fragmentary perspective view which shows the mode of the notch part vicinity at the time of the slat raise concerning 2nd Embodiment. It is a top view which shows the inside of the head box which concerns on 3rd Embodiment. It is a fragmentary perspective view showing interference with a notch and a ladder code.

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

(First embodiment)
1 to 10 show a first embodiment of the present invention. This embodiment is particularly suitable for application to heavy products.

  An endless operation cord (operation unit) 14 is suspended from one end of the head box 10 fixed to the window frame or the like by the bracket 11, and the operation cord 14 is a pulley (operation unit) disposed in the head box 10. 15 is wound around and can be rotated. 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. The rotary shaft 12 is provided with three elevating drums 20 that rotate in conjunction with the rotation of the rotary shaft 12 at intervals in the left-right direction of the head box 10.

  Ladder cords 16 are suspended below the head box 10 from the position where each lifting drum 20 is disposed, and each ladder cord 16 is tilted in conjunction with rotation within a predetermined range angle of the rotary shaft 12. . 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 ladder cord 16 forms a pair of crossing portions by reversing the vertical relationship of the upper and lower cords of each middle cord 16c, and inserts the slats 18 between the crossing portions, so that a large number of slats 18 are aligned. The lower end of the ladder cord 16 is fixed to a bottom rail 24 disposed below the slat 18 located at the lowest level.

  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 coupled 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. Is done. The drum receiver 28 includes ladder cord guide portions 28a and 28b that allow the vertical cords 16a and 16b before and after the ladder cord 16 to pass therethrough and that prevent the distance between 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 first and second elevating cords 22a and 22 shown in FIGS. 3 (a), 3 (b), and 5 are connected to the elevating / lowering cord 22 arranged on the inner side in the horizontal direction of the head box 10 and connected to the elevating drum 20. It is like a drum 20a. The first lifting / lowering cord 22a is arranged along the rear vertical cord 16b of the front and rear vertical cords 16a and 16b, and a loop-shaped portion protruding further rearward from the connecting portion of the vertical cord 16b with each middle cord 16c. 16d is inserted. One end of the first lifting / lowering cord 22a is guided upward via the first lifting / lowering cord guide portion 28c on the rear side of the drum receiver 28, and then wound in one direction. It is connected to the part 26.

  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 shown in FIGS. 4 (a), 4 (b) and FIG. It is like a lifting drum 20b. The second lifting / lowering cord 22b is arranged along the front vertical cord 16a, and is inserted into a loop-like portion 16e that protrudes further forward from a connecting portion of the vertical cord 16a with each middle cord 16c. Then, one end of the second lifting / lowering cord 22b is rolled backward via the second lifting / lowering cord guide portion 28d on the front side of the drum receiver 28, and then wound in the same direction as the first lifting / lowering cord 22a. In this way, it is connected to the drum portion 26 of the second elevating drum 20b.

  As a result, the first lifting / lowering cord 22a and the second lifting / lowering cord 22b are moved to the respective lifting / lowering drums 20a and 20b by the first lifting / lowering drum 20a and the second lifting / lowering drum 20b rotating in the same direction by the rotation of the rotary shaft 12. It is wound up or unrolled at the same time.

  As shown in FIG. 7, each of the lifting drums 20 a and 20 b has an equal interval B between the first lifting cord 22 a located inside the center in the left-right direction and each second lifting cord 22 b located outside in the left-right direction. The distance A (blade protrusion dimension) between each second lifting / lowering cord 22b and the end of the slat 18 closest to the second lifting / lowering cord 22b is constant, and is disposed at a position where the distance A is smaller than the distance B.

  As shown in FIG. 10, at least one notch 18a is formed at the rear side edge of the slat 18, and the crossing portion of the middle cord 16c of the ladder cord 16 is hooked on the notch 18a. Thus, the horizontal displacement of the slat 18 is prevented.

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

  First, in order to rotate the slat 18 as shown in FIG. 1 from the horizontal fully open state to the fully closed state shown in FIG. 2, the pulley 15 is moved by pulling down the rear side of the operation cord 14. The rotary shaft 12 is rotated, and the rotary shaft 12 is rotated in the clockwise direction in FIGS. 3 (a) and 4 (a). As a result, as shown in FIGS. 3B and 4B, the vertical cord 16b on the rear side is lowered, the vertical cord 16a on the front side is raised, the ladder cord 16 is tilted, and each slat 18 is moved. Since it inclines, a slat can be made into a fully closed state.

  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, and the rotary shaft 12 is moved in FIGS. 3 (a) and 4 (a). Rotate counterclockwise. Accordingly, as shown in FIGS. 3C and 4C, the rear vertical cord 16b is raised, the front vertical cord 16a is lowered and the ladder cord 16 is tilted, and each slat 18 is moved. Tilt. Thereby, a slat can be made into a fully closed state.

  At the time of this slat rotation, as shown in FIGS. 3B and 3C, the first elevating cord 22a is located further rearward than the rear vertical cord 16b, and is shown in FIGS. 4B and 4C. As described above, since the second lifting / lowering cord 22b is positioned further forward than the front vertical cord 16a, the second lifting / lowering cord 22b does not contact the inclined slat 18 and does not interfere with the slat rotation.

  Next, in order to raise the slat 18, an operation of pulling down the front side of the operation cord 14 is performed, and the slat 18 is continuously closed even after the slat 18 is fully closed and the ladder cord 16 can no longer rotate. When the operation of pulling down the front side of the operation cord 14 is continued, the first lifting drum 20a winds up the first lifting cord 22a, and each second lifting drum 20b winds up each second lifting cord 22b. Thereby, the 1st raising / lowering cord 22a goes up via the 1st raising / lowering cord guide part 28c, and each 2nd raising / lowering cord 22b goes up via each 2nd raising / lowering code guide part 28d, respectively. For this reason, the 1st raising / lowering cord 22a and the 2nd raising / lowering cord 22b can raise the bottom rail 24, and can fold and raise the slat 18 in connection with this.

  Further, when the slat 18 is lowered, the operation is continued after the operation of pulling the rear side of the operation cord 14 so that the slat 18 is fully closed and the ladder cord 16 cannot be further rotated. By continuing the operation of pulling down the rear side of the operation cord 14, the first lifting drum 20a and the second lifting drum 20b unwind the first lifting cord 22a and the second lifting cord 22b, respectively. Thereby, the 1st raising / lowering cord 22a goes down via the 1st raising / lowering cord guide part 28c, and the 2nd raising / lowering cord 22b goes down via the 2nd raising / lowering code guide part 28d, respectively. For this reason, the 1st raising / lowering cord 22a and the 2nd raising / lowering cord 22b can lower the bottom rail 24, and the slat 18 can be lowered | hung with this.

  Thus, by operating the operation cord 14, the lifting cords 22a and 22b are wound or unwound around the lifting drums 20a and 20b, and the slats 18 are moved up and down, so that the operation load can be reduced.

  Further, the lifting / lowering cord 22 can be disposed at a position offset from the central portion of the slat 18 in the front-rear direction, and the entire slat 18 and the bottom rail 24 can be balanced during the lifting / lowering. 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.

  As shown in FIG. 8, the load applied to each lifting / lowering cord 22a and 22b has a large traction force required for the bottom rail 24 to move up and down horizontally without tilting to the left and right, depending on the relationship with the blade projection size of the slat 18. The first lifting / lowering cord 22a wound around the inner first lifting / lowering drum 20a is larger, and the outer second lifting / lowering cord 22b is smaller. For this reason, by arranging the first lifting / lowering cord 22a via the first lifting / lowering cord guide portion 28c that is guided upward with almost no bending, the resistance applied to the first lifting / lowering cord 22a is reduced, and the second lifting / lowering cord 22b is Since the resistance applied to the second lifting / lowering cord 22b is increased by rotating and bending the second lifting / lowering cord guide 28d via the second lifting / lowering cord guide 28d, the load on each of the lifting / lowering cords 22a and 22b is distributed in a balanced manner. And durability as a product can be improved.

  In the above example, the number of the lifting drums 20 and the lifting cords 22 is three. However, the present invention is not limited to this, and may be two, four, or more. For example, in the case of two, one of the lifting / lowering cord 22 and the lifting / lowering drum 20 is the first lifting / lowering cord 22a and the first lifting / lowering drum 20a, and the other lifting / lowering cord 22 and the lifting / lowering drum 20 is the second lifting / lowering cord 22b. And it is good to set it as the 2nd raising / lowering drum 20b. In the case of four, the two lifting / lowering cords 22 and the two lifting / lowering drums 20 arranged inside the center in the left-right direction of the head box 10 are defined as the first lifting / lowering cord 22a and the first lifting / lowering drum 20a. The two lifting / lowering cords 22 and the two lifting / lowering drums 20 arranged outside the left and right end portions may be the second lifting / lowering cord 22b and the second lifting / lowering drum 20b.

(Second embodiment)
Next, a second embodiment will be described based on FIGS. This embodiment is particularly suitable for reliably preventing the slat 18 from shifting in the horizontal direction. Hereinafter, description about the same structure as 1st Embodiment is abbreviate | omitted, and the same code | symbol as 1st Embodiment is attached | subjected to the same member.

  In the second embodiment, the configuration of the first elevating drum 20a, the first elevating cord 22a, and the rear vertical cord 16b arranged in the center in the left-right direction of the head box 10 in the first embodiment is as shown in FIG. FIG. 14 shows the configuration of the second elevating drum 20b, the second elevating cord 22b, and the front vertical cord 16a arranged outside the horizontal blind in the left-right direction and outside the end in the left-right direction in the first embodiment. As shown, it is arranged inside the center in the left-right direction of the horizontal blind. Accordingly, as shown in FIGS. 11 and 12, the second elevating cord 22 b disposed inside the center in the left-right direction is on the front side of the slat 18, and the first elevating cord 22 a disposed on the outer side in the left-right direction is the rear side of the slat 18. Respectively.

  As shown in FIG. 15, one or more notches 18a are formed on the rear side edge of the slat 18, and the first lifting cord 22a is formed at the notch 18a of the one or more slats 18. Is inserted into the notch 18a from the midway position in the vertical direction of the vertical cord 16b to the lower end as shown in FIGS. 13, 15, and 16, so as to be inserted between the notch 18a and the vertical cord 16b. The portion from the middle position in the vertical direction of the vertical cord 16b to the first elevating drum 20a is distributed in the same manner as in the first embodiment.

  As described above, the first lifting / lowering cord 22a is inserted into the notch 18a and is inserted between the notch 18a and the vertical cord 16b, so that the notch 18a is engaged with the first lifting / lowering cord 22a and the vertical cord 16b. Is more difficult to come off. Therefore, since the horizontal movement of the slat 18 is restricted by the notch 18a and the first lifting / lowering cord 22a, the horizontal displacement of the slat 18 can be more reliably prevented. Further, the presence of the notch 18a can improve the rotability when the slat is rotated. When a plurality of cutout portions 18a are provided (may be provided on both or one of the front and rear side edges of the slat), the lifting cord 22 is connected to the vertical cord and the cutout portion in all the cutout portions 18a. It is not necessary to insert the lifting / lowering cord 22 between the vertical cord and the notch in at least one notch 18a. In other portions, the lifting / lowering cord has a loop shape. It may be inserted through the part.

  When rotating and raising / lowering the slat 18, it can carry out similarly to 1st Embodiment. At this time, when the slat 18 is raised, as shown in FIGS. 13 (c) and 16 (c), the slat 18 is tilted and raised so that the notch 18a faces upward. There is no fear that 22a and the ladder cord 16 enter the notch 18a together or get caught at the corner of the notch 18a, and the ascending operation is smooth.

  Further, when the slat 18 is lowered, as shown in FIGS. 13 (b) and 16 (b), the slat 18 is inclined and lowered so that the notch 18a faces downward. There is no fear that 22a and the ladder cord 16 enter the notch 18a together or get caught at the corner of the notch 18a, so that the descent operation is smooth.

  On the other hand, if the slat is tilted and lifted so that the notch is directed downward when the slat is raised, the slack portion of the vertical cord of the ladder cord is the lifting cord as shown in FIG. In some cases, it may enter the space between the cutout portions, and the loosened and folded portions may be caught by the corner portions of the cutouts. Therefore, when the lowering operation is performed in that state, the notch is lowered with the notch facing upward, so that the catch does not come off as it is, and the slats are lowered and the lowering operation is continued. There is a risk that the slat will descend with the left and right balance being uneven.

  However, in the present embodiment, since the ladder cord is not caught at the time of ascent, such a problem can be eliminated.

(Third embodiment)
Next, FIG. 17 shows a third embodiment using a modified example of the lifting drum.

  In this example, only one lifting / lowering cord guide portion 28d is formed on the drum receiver 28 of the lifting / lowering drum 20 outside the ladder cord guide portions 28a and 28b. The left / right direction of the lifting drum 20 disposed inside the center in the left / right direction is opposite to the left / right direction of the lifting drum 20 disposed outside the left / right direction. Thereby, even if only one lifting / lowering code guide portion 28d for guiding the lifting / lowering cord 22 is provided, the position of the lifting / lowering cord guide portion 28d of the drum receiver 28 of the lifting / lowering drum 20 disposed in the center in the left-right direction is the front-rear direction position. Since the position of the lifting / lowering cord guide 28d of the drum receiver 28 of the lifting / lowering drum 20 disposed on the outer side in the left / right direction is opposite to the front / rear direction, the lifting / lowering cord 22 is formed of different slats on the inner side in the left / right direction and on the outer side in the left / right direction. Can be arranged on the side.

  In the above embodiment, the lifting / lowering cord is disposed outside the side edge of the slat, so that the lifting / lowering cord insertion hole of the slat is omitted. However, the present invention is not limited to this, and the center of the slat in the front-rear direction is omitted. The present invention is also applicable to the case where a plurality of lifting / lowering cord insertion holes are provided at positions offset from the portion and the lifting / lowering cords are disposed in the lifting / lowering cord insertion holes.

  In the above-described embodiment, the rotating shaft 12 is manually driven to rotate. However, the present invention is not limited to this, and the rotating shaft 12 is connected to an electric motor to be driven to rotate electrically. It can also be configured. 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.

DESCRIPTION OF SYMBOLS 10 Head box 12 Rotating shaft 16 Ladder cord 16a, 16b Vertical cord 18 Slat 18a Notch 20 Lifting drum 20a 1st 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)
28c, 28d Lift code guide

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 In a horizontal blind comprising a slat (18) and a plurality of elevating cords (22) capable of elevating and lowering the slat, wherein the elevating cord is disposed at a position offset from the center of the slat in the front-rear direction.
A plurality of elevating drums (20) that rotate in conjunction with rotation of the rotary shaft, and one end of the elevating cord is connected to the elevating drum so as to be wound and unwound;
At least one lifting / lowering cord (22a) is introduced into the head box from one side in the front / rear direction of the head box, and another lifting / lowering cord (22b) is introduced from the other side in the front / rear direction of the head box into the head box. ,
Notch on the side edges of the slats (18a) are formed, at least one notch in (18a), hand of the lift cord is before and after the cutout portion and the ladder cord vertical cord (16a, 16b) The notch portion (18a) through which the lifting / lowering cord is inserted between the vertical cord and the vertical cord is located only on one side edge of the slat and raises the slat. A horizontal blind characterized by facing upward of an inclined slat and facing downward of the inclined slat when the slat is lowered.   The horizontal blind according to claim 1, further comprising a lifting / lowering cord guide portion (28c, 28d) for hanging the lifting / lowering cord to a position offset from a center portion in the front-rear direction of the slat.   The lifting / lowering cord other than the lifting / lowering cord inserted between the notch and the vertical cord is disposed along the vertical cords before and after the ladder cord on the outer side edge of the slat. 2. The horizontal blind according to 2. At least three lifting drums are arranged in the left and right direction of the head box,
The lifting drum (20b) on the left and right outer sides is connected to a lifting cord that is introduced into the head box from one side in the front-rear direction of the head box and is turned toward the other side via the lifting cord guide portion.
The at least one inner elevating drum (20a) is connected to an elevating cord introduced into the head box from the other side in the front-rear direction of the head box and guided upward through the elevating code guide portion. The horizontal blind according to any one of claims 1 to 3, characterized in that At least three lifting drums are arranged in the left and right direction of the head box,
The at least one inner elevating drum (20b) is connected to an elevating cord introduced into the head box from one side in the front-rear direction of the head box and turned toward the other side through the elevating cord guide portion. ,
The lifting drum (20a) on the left and right outer sides is connected to a lifting cord introduced into the head box from the other side in the front-rear direction of the head box and guided upward through the lifting cord guide portion. The horizontal blind according to any one of claims 1 to 3.

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