JP5767363B2 - Operation codes and blinds operated by operation codes - Google Patents

Description

  The present invention relates to an operation cord for a horizontal blind, a vertical blind, a roll screen, a screen door, a vertical sliding window, an awning, a skylight, a clothes lift elevating device, and the like.

  As a type of horizontal blind, an endless cord is mounted on a pulley that is rotatably supported at one end of the head box, and the cord is operated to rotate the pulley to move the slat up and down and adjust the angle. There is something that can be operated.

Such an operation cord is formed in an endless shape, for example, by welding or sewing both ends of a cord formed of a synthetic resin in a string shape.
A horizontal blind using a ball chain instead of the operation cord has also been put into practical use. In such a ball chain, both ends of a cord formed by attaching a large number of balls are connected with connectors to make them endless, or as disclosed in Patent Document 1, the ball at the joint is divided into two parts An endless ball chain is formed by fitting the divided portions together to form a ball.

JP 2003-184456 A

When the endless operation cord is suspended from the pulley as described above, the endless edge of the operation cord may be caught by a resident or other moving object moving in the room.
Therefore, when an excessive pulling force that exceeds the pulling force acting during normal operation is applied to the operation cord, the operation cord is cut by the pulling force to ensure the safety of the occupant, and It is necessary to provide a fail-safe function for preventing damage to a pulley or the like on which an operation cord is mounted.

  An object of the present invention is to provide an operation code and a blind that exhibit a fail-safe function.

The operation cord according to claim 1, wherein both end portions of the cord are connected to each other, and a ball is formed at a connecting portion of the both end portions of the cord, and a tensile force exceeding a force that normally acts on the operation cord. When the is acted, the ball is disconnected from at least one of both ends of the cord at the connecting portion and the ball.

In Claim 2, the connection part of the both ends of the said code | cord | chord is formed with the ball | bowl by which the connection code | cord | chord was connected to the both sides, and when the tensile force exceeding the force which acts normally on the said operation code | symbol acted, The connection between at least one of the ball and the ball is released.
According to a third aspect of the present invention, there is provided an operation cord in which both end portions of the cord are connected to each other by a connecting portion, and the connecting portion includes a first connecting member and a second connecting member, and the first and first connecting members are provided. second connecting member, and a small-diameter spherical portion from said code, a smaller diameter than the diameter of the spherical portion, and includes a spherical portion and a concatenated code, which is integrally formed to extend from both sides of the spherical portion, The connecting portion is formed so as to be separable when a tensile force exceeding a force that normally acts on the operation cord is applied.

According to a fourth aspect of the present invention, the spherical portion is formed such that the first fitting portion and the second fitting portion are elastically detachable, and the base end portion of the first fitting portion is the cord. It is formed in a hemispherical shape with a diameter smaller than the diameter.

According to a fifth aspect of the present invention, a fitting projection is formed at the tip of the first fitting portion, and the fitting projection can be fitted at the tip of the second fitting portion. When the fitting protrusion is formed and the fitting protrusion is fitted in the fitting hole, the outer diameters of the first and second fitting parts are smaller than the diameter of the cord. Has been.

According to claim 6, a blind that is operated by the operation code of any one of claims 1-5, wherein the operation code is hung on a pulley which is rotatably supported by the head box, the operation By operating the cord and rotating the pulley, the cord can be moved up and down.

  The present invention exhibits a fail-safe function.

It is a front view which shows the horizontal blind of one Embodiment. It is a front view which shows an operation code. It is a disassembled perspective view which shows the connection part of 1st embodiment. It is a front view which shows the 1st connection member of 1st embodiment. It is sectional drawing which shows the 2nd connection member of 1st embodiment. It is sectional drawing which shows the fitting state of a connection member. It is a disassembled perspective view which shows 2nd embodiment. It is a front view which shows the 1st connection member of 2nd embodiment. It is a bottom view which shows the 1st connection member of 2nd embodiment. It is the sectional view on the AA line in FIG. It is sectional drawing which shows the 2nd connection member of 2nd embodiment. It is a top view which shows the 2nd connection member of 2nd embodiment. It is the BB sectional view taken on the line in FIG. It is sectional drawing which shows the fitting state of a connection member. It is sectional drawing which shows the connection part of 3rd embodiment. It is a disassembled perspective view which shows the connection part of 3rd embodiment. It is a front view which shows the 1st connection member of 3rd embodiment. It is a top view which shows the 1st connection member of 3rd embodiment. It is a side view which shows the 1st connection member of 3rd embodiment. It is CC sectional view taken on the line in FIG. It is a front view which shows the 2nd connection member of 3rd embodiment. It is a rear view which shows the 2nd connection member of 3rd embodiment. It is the DD sectional view taken on the line in FIG. It is the EE sectional view taken on the line in FIG. It is the FF sectional view taken on the line in FIG. It is sectional drawing which shows the fitting state of a connection member. It is a front view which shows the connection part of 4th embodiment. It is sectional drawing which shows the connection part of 4th embodiment.

(First embodiment)
Hereinafter, a first embodiment of the present invention will be described with reference to the drawings. In the horizontal blind shown in FIG. 1, a multi-stage slat 3 is supported on a ladder tape 2 that is suspended from a head box 1, and a bottom rail 4 is attached to the lower end of the ladder tape 2.

  An elevating cord 5 is inserted into the slat 3 in the vicinity of the support position of the ladder tape 2, and the bottom rail 4 is suspended and supported at the lower end of the elevating cord 5. An upper end of the lifting / lowering cord 5 is wound around a winding shaft 7 rotatably supported by a support member 6 disposed in the head box 1.

  A pulley 8 is rotatably supported at one end of the head box 1, and an endless operation cord 9 is hung on the pulley 8. When the operation cord 9 is operated to rotate the pulley 8 in the forward and reverse directions, the winding shaft 7 is rotated via the gear box 10 and the lifting shaft 12a, and the lifting cord 5 is wound around the winding shaft 7. The slat 3 and the bottom rail 4 are moved up and down by being taken up or rewound.

  When the pulley 8 is rotated, the tilt drum 13 is rotated via the gear box 10, the tilt unit 11, the tilt shaft 12 b and the like, and each slat 3 is rotated via the ladder tape 2. ing.

  As shown in FIG. 2, the operation cord 9 is formed in an endless shape by connecting both ends of the cord 14 with connecting portions 15. The cord 14 is formed by coating a core 16a formed of polyester, nylon, or the like with a skin cord 16b knitted from polyester, and the linearity of the operation cord 9 is ensured by the core 16a, and the extension direction Durability is ensured.

  A specific configuration of the connecting portion 15 will be described with reference to FIGS. As shown in FIG. 3, the connecting portion 15 includes a first connecting member 17 and a second connecting member 18. As shown in FIG. 4, the first connecting member 17 has a first fitting portion 21 formed of a synthetic resin at one end of a connecting cord 19 made of the same material as that of the core 16a.

  The base end portion of the first fitting portion 21 is formed in a hemispherical shape with a diameter smaller than the diameter of the cord 14, and a round shaft-like fitting protrusion is formed at the distal end portion of the first fitting portion 21. 22 is formed. The fitting protrusion 22 has a flange-like enlarged diameter portion 22a formed at the tip, and the outer diameter of the enlarged diameter portion 22a is smaller than the maximum diameter of the hemispherical base end portion. Further, a chamfer 22b is formed at the corner on the tip side of the expanded diameter portion 22a.

As shown in FIG. 5, the second connecting member 18 is formed with a second fitting portion 25 made of the same material as the first fitting portion 21 at one end of a connecting cord 23 similar to the connecting cord 19. Has been.
A base end portion of the second fitting portion 25 is formed in a hemispherical shape, and a fitting hole 26 is formed at a tip portion of the second fitting portion 25. And the diameter of the back part of the fitting hole 26 is formed larger than the diameter of an opening part, and as shown in FIG. 6, the expansion diameter part 22a of the said fitting protrusion 22 is elastically fitted, and it hold | maintains. It is possible.

  This holding force is set so that the fitting protrusion 22 and the fitting hole 26 are not disengaged by a normal tensile force acting on the operation cord 9 during a normal slat raising / lowering operation and a slat angle adjusting operation. Yes. Further, only when a large tensile force exceeding the normal tensile force acts on the operation cord 9, the fitting protrusion 22 and the fitting hole 26 are disengaged due to the elasticity of the synthetic resin.

The fitting hole 26 is formed by forming a second fitting portion 25 in the connecting cord 23 and cutting the center of the tip of the second fitting portion 25 by cutting.
In order to attach the first and second connecting members 17 and 18 to the cord 14, as shown in FIG. 2, the cores 16a at both ends of the cord 14 are removed to form a space in the shaft center portion. The connecting cords 19 and 23 of the first and second connecting members 17 and 18 are inserted into the spaces, respectively. When the outer cord 16b and the connecting cords 19 and 23 are sewn in this state, the first and second connecting members 17 and 18 are attached to the cord 14.

  Then, when the fitting protrusion 22 is fitted into the fitting hole 26, as shown in FIG. 6, the first and second connecting members 17, 18 are connected to form the connecting portion 15, and FIG. As shown, an endless operation cord 9 is formed.

With the operation cord 9 configured as described above, the following operational effects can be obtained.
(1) When a large tensile force exceeding a normal tensile force is applied to the operation cord 9, the fitting protrusion 22 and the fitting hole 26 of the connecting portion 15 are disengaged. Therefore, when the endless edge of the operation cord 9 is caught by a resident moving in the room or other moving objects, the operation cord 9 is cut at the connecting portion 15 to ensure the safety of the resident, and the operation code 9 is applied. It is possible to provide a fail-safe function for preventing damage to the mounted pulley 8 or the like.
(2) After the fitting projection 22 and the fitting hole 26 of the connecting portion 15 are disengaged, if the fitting projection 22 is fitted again into the fitting hole 26, the endless operation cord 9 is obtained. Can be easily reproduced.
(3) A configuration in which a round shaft-like fitting protrusion 22 formed on the first hemispherical fitting portion 21 is fitted into a fitting hole 26 drilled in the second hemispherical fitting portion 25. As a result, a holding force for holding the fitting protrusion 22 in the fitting hole 26 can be ensured.
(4) By sewing the connecting cords 19 and 23 of the first and second connecting members 17 and 18 to both ends of the cord 14, the operation cord 9 having a fail-safe function can be easily configured.
(Second embodiment)
7 to 14 show a second embodiment of the connecting portion 15 of the operation cord 9. The same components as those in the first embodiment will be described with the same reference numerals.

  As shown in FIG. 7, the connecting portion 15 includes a first connecting member 27 and a second connecting member 28. As shown in FIG. 8, in the first connecting member 27, a first fitting portion 29 is formed of a synthetic resin at one end of a connecting cord 19 made of the same material as the core 16a of the cord 14. At the tip of the first fitting portion 29, a fitting protrusion 30 having a bowl-shaped cross section is formed by cutting both side portions of the round shaft in parallel.

  As shown in FIGS. 7, 9, and 10, an enlarged diameter portion 31 that is enlarged in the major axis direction of the bowl shape is formed at the distal end portion of the fitting protrusion 30. Concave strips 32 are provided in the axial direction of the first fitting portion 29 on the outer peripheral surfaces of both side portions in the long axis direction. In addition, a chamfer 33 is formed at the corner of the tip of the bulged portion 31.

  As shown in FIG. 11, the second connecting member 28 has a second fitting portion 34 formed at one end of a connecting cord 23 made of the same material as the core 16 a of the cord 14. The second fitting portion 34 is formed of the same synthetic resin as the first fitting portion 29.

  The base end portion of the second fitting portion 34 is formed in the hemispherical shape, and a fitting hole 35 is formed in the central portion of the distal end surface of the second fitting portion 34. As shown in FIG. 12, the fitting hole 35 is opened in a bowl shape that allows insertion of the enlarged diameter portion 31 of the fitting protrusion 30.

  As shown in FIGS. 11 and 13, the inner portion of the fitting hole 35 is formed in a circular shape with a diameter that allows the fitting protrusion 30 to rotate within the fitting hole 35. Accordingly, a locking portion 37 that engages with the expanded diameter portion 31 is formed in the opening portion of the fitting hole 35 in a line symmetrical manner. The opening edge of the locking portion 37 is curled in an arc shape so that the base end portion of the fitting protrusion 30 can be rotated.

  A protrusion 36 that can engage with the recess 32 is formed on one side of the inner peripheral surface of the inner portion of the fitting hole 35. The protrusion 36 is formed on a short axis L2 orthogonal to the long axis L1 of the opening of the fitting hole 35.

  In order to connect the first fitting portion 29 and the second fitting portion 34 as described above, the expanded diameter portion 31 of the fitting protrusion 30 is inserted into the fitting hole 35, and in this state, the first fitting portion 29 and the second fitting portion 34 are connected. The fitting part 29 is rotated 90 degrees in either direction. Then, the recess 32 of the enlarged diameter part 31 is engaged and positioned with the protrusion 36 in the fitting hole 35, and the enlarged diameter part 31 is engaged with the engaging part 37 and fitted as shown in FIG. It is held in the joint hole 35.

  This holding force is set so that the fitting protrusion 30 and the fitting hole 35 are not disengaged by a normal tensile force acting on the operation cord 9 during a normal slat raising / lowering operation and a slat angle adjusting operation. Yes. Further, only when a large tensile force exceeding the normal tensile force is applied to the operation cord 9, the opening of the fitting hole 35 is expanded by the elasticity of the synthetic resin, and the expanded diameter portion 31 is pulled out from the fitting hole 35. The fitting protrusion 30 and the fitting hole 35 are disengaged from each other.

Further, in a state where the fitting protrusion 30 is fitted in the fitting hole 35, the outer diameters of the first and second fitting parts 29, 34 are formed to be smaller than the diameter of the cord 14. .
As for said 1st and 2nd connection members 27 and 28, the connection cords 19 and 23 are sewn on the code | cord | chord 14 similarly to said 1st embodiment. Then, when the fitting protrusion 30 is fitted into the fitting hole 35, as shown in FIG. 14, the first and second connecting members 27 and 28 are connected to form an endless operation cord 9. The

In the operation code configured as described above, the following operational effects can be obtained in addition to the operational effects obtained in the first embodiment.
(1) Since the enlarged diameter portion 31 of the fitting protrusion 30 is inserted into the fitting hole 35 and rotated 90 degrees, the fitting protrusion 30 is fitted into the fitting hole 35. The operation force for fitting the mating protrusion 30 into the fitting hole 35 is lighter than that of the first embodiment, and the holding force for holding the fitting protrusion 30 in the fitting hole 35 is sufficient. Can be secured.
(Third embodiment)
15 to 26 show a third embodiment of the connecting portion 15 of the operation cord 9. The same components as those in the first embodiment will be described with the same reference numerals.

As shown in FIGS. 15 and 16, the connecting portion 15 has a configuration in which two first connecting members 41 having the same configuration are connected by a cylindrical second connecting member 42.
As shown in FIG. 17, in the first connecting member 41, a first fitting portion 43 is formed of a synthetic resin at one end of a connecting cord 19 made of the same material as the core 16a of the cord 14.

A base end portion of the first fitting portion 43 is formed in the hemispherical shape, and a round shaft-like fitting protrusion 45 is formed at a distal end portion of the first fitting portion 43.
As shown in FIGS. 16 to 19, an enlarged diameter portion 46 is formed in line symmetry with respect to the center of the round shaft on the outer peripheral surface of the distal end portion of the fitting protrusion 45. A concave strip 47 having a semicircular cross section is formed in the middle.

  As shown in FIGS. 16 and 20, a rotation restricting portion 48 that protrudes in the radial direction of the round shaft is formed at the base end portion of the fitting protrusion 45 so as to be symmetrical with respect to the center. Each rotation restricting portion 48 is formed at a position 45 degrees away from the recess 47 in the circumferential direction with respect to the center of the round shaft.

  The second connecting member 42 is formed into a cylindrical shape with the same synthetic resin as the first fitting portion 43, and as shown in FIGS. 16, 21, and 22, openings 49a and 49b on both sides are formed. The fitting protrusion 45 is formed in a bowl shape in which a distal end portion including the enlarged diameter portion 46 can be inserted. In addition, the openings 49a and 49b have shapes in which the direction of the bowl shape is rotated 90 degrees with respect to the center of the cylinder.

  A circular hole 50 having a diameter that allows the distal end portion of the fitting projection 45 to turn is formed inside the second connecting member 42. Further, locking portions 51a and 51b that prevent the bulging portion 46 from coming out of the circular hole 50 are formed on the opening edge in the short axis direction of the flange shape of the opening portion 49a, respectively. Locking portions 51c and 51d are formed on the opening edge in the minor axis direction to prevent the bulging portion 46 from coming out of the circular hole 50, respectively.

Further, on the inner side of the locking portions 51a and 51c, protrusions 52 that engage with the recesses 47 are formed on the inner peripheral surface of the circular hole 50, respectively.
In order to connect the first connecting member 41 and the second connecting member 42, the fitting protrusion 45 of the first fitting portion 43 is inserted into the opening 49 a of the second connecting member 42, One fitting portion 43 is rotated 90 degrees clockwise with respect to the second connecting member 42. Then, the recess 47 of the fitting protrusion 45 is engaged with the protrusion 52 in the circular hole 50, and the rotation restricting portion 48 is moved from the bowl-shaped corner of the opening 49a to the adjacent corner, Positioning is performed as shown in FIG.

  Similarly, the first connecting member 41 is inserted into the other opening 49b of the second connecting member 42 and rotated 90 degrees for positioning. Then, as shown in FIG. 15, the first connecting member 41 is connected via the second connecting member 42.

  In this state, the expanded diameter portion 46 of the fitting protrusion 45 of each first connecting member 41 engages with the locking portions 51 a to 51 d of the second connecting member 42, and the second connecting member 42 has a circular shape. It is held in the hole 50.

  This holding force is set so that the fitting protrusion 45 does not come off from the second connecting member 42 with a normal tensile force acting on the operation cord 9 during a normal slat raising / lowering operation and a slat angle adjusting operation. Yes. Then, only when a large tensile force exceeding the normal tensile force is applied to the operation cord 9, the second connection member 42 is connected to the second connection member 42 by the expanded diameter portion 46 of the fitting protrusion 45 due to the elasticity of the synthetic resin of the second connection member 42. The opening portions 49 a and 49 b of the member 42 are pushed and expanded so that the fitting protrusion 45 is detached from the second connecting member 42.

Further, the outer diameter in a state where the first fitting portion 43 is fitted on both sides of the second connecting member 42 is formed to be smaller than the diameter of the cord 14.
As for said 1st and 2nd connection members 41 and 42, the connection code | cord | chord 19 is sewn on the code | cord | chord 14 similarly to said 1st embodiment. Then, when the fitting protrusion 45 is fitted to the second connecting member 42, the first connecting member 41 is connected by the second connecting member 42 as shown in FIG. 9 is formed.

In the operation code configured as described above, the following operational effects can be obtained in addition to the operational effects obtained in the second embodiment.
(1) A configuration in which the fitting protrusion 45 is fitted to the second connecting member 42 by inserting the fitting protrusion 45 into the openings 49a and 49b of the second connecting member 42 and rotating the fitting protrusion 45 by 90 degrees. It was. Therefore, the operating force for fitting the fitting protrusion 45 to the second connecting member 42 is lighter than that of the first embodiment, and the fitting protrusion 45 is connected to the second connecting member 42. Sufficient holding force can be secured.
(2) The first connecting member 41 connected by the second connecting member 42 is held in a state where the fitting protrusions 45 are shifted from each other by 90 degrees. Therefore, when a tensile force is applied to each fitting protrusion 45, the expanded diameter portion 46 of each fitting protrusion 45 pushes the openings 49a and 49b of the second connecting member 42 in a direction shifted by 90 degrees from each other. Therefore, it is easy to ensure the holding force.
(Fourth embodiment)
27 and 28 show a fourth embodiment of the connecting portion 15 of the operation cord 9. The same components as those in the first embodiment will be described with the same reference numerals.

  As shown in FIG. 27, the connecting portion 15 has connecting cords 19 and 23 formed on both sides of a ball 61 formed of synthetic resin. The balls 61 are formed by fixing an oblong solid body on the surface of a single cord with a molding machine.

  A through hole 62 is formed in the ball 61 by a drill or the like in a direction orthogonal to the cord. The diameter of the through hole 62 is formed to be larger than the diameter of the cord passing through the ball 61. Therefore, as shown in FIG. 28, in the ball 61 in which the through hole 62 is formed, the cord is cut by the through hole 62 to form the connecting cords 19 and 23.

With such a configuration, since the joint area between the connecting cords 19 and 23 and the ball 61 is reduced, the holding force of the connecting cords 19 and 23 with the ball 61 is reduced.
The through hole 62 is formed at the center of the long axis direction of the ball 61 so that the connecting cords 19 and 23 embedded in the ball 61 on both sides of the through hole 62 have the same length. ing. Such a ball 61 constitutes the first and second connecting members.

As in the first embodiment, the connecting cords 19 and 23 of the connecting portion 15 are sewn to both ends of the cord 14 to form the endless operation cord 9.
As a holding force for the balls 61 and the connecting cords 19 and 23, a holding force is secured so that the connecting cords 19 and 23 are not detached from the balls 61 by a tensile force acting on the operation cord 9 during normal operation of the horizontal blind. Further, when an excessive tensile force that exceeds the tensile force that is applied during normal operation is applied, at least one of the connecting cords 19 and 23 is detached from the ball 61.

In the operation cord provided with the connecting portion 15 of this embodiment, the following operational effects can be obtained in addition to the operational effects obtained in the first embodiment.
(1) By sewing the connecting cords 19 and 23 of the connecting portion 15 provided with the through holes 62 in the ball 61 to the end portion of the cord 14, the operation cord 9 can be provided with a safety function by simple processing. Therefore, the manufacturing cost of the operation cord 9 having a safety function can be reduced.

You may implement the said embodiment in the following aspects.
In the fourth embodiment, the through hole 62 may be provided so as to cut a part of the cord in the ball 61.
-You may shape | mold so that the edge part of the connection cords 19 and 23 cut | disconnected previously may be covered with the ball | bowl 61. FIG.
A cut may be made in advance in the cord, and the cut portion may be formed to be covered with the ball 61.

DESCRIPTION OF SYMBOLS 9 ... Operation code, 14 ... Code, 15 ... Connecting part, 17, 27, 41, 61 ... First connecting member (ball), 18, 28, 42, 61 ... Second connecting member (ball), 19, 23 ... connecting cord, 21, 29, 43 ... first fitting portion (spherical portion) , 25, 34, 42 ... second fitting portion (spherical portion) , 61 ... ball (spherical portion) .

Claims (6)

It is an operation cord that connects both ends of the cord to make it endless,
Balls are formed on the connecting portions of both ends of the cord,
When a tensile force exceeding the force that normally acts on the operation cord is applied, the connection between at least one of both ends of the cord in the connecting portion and the ball is released. Operation code. The connecting portion at both ends of the cord is formed with a ball connected to the connecting cord on both sides thereof,
The operation according to claim 1, wherein when a tensile force exceeding a force that normally acts on the operation cord is applied, the connection between at least one of the connection cords and the ball is released. code. An operation cord in which both ends of the cord are connected by a connecting portion to be endless,
The connecting portion includes a first connecting member and a second connecting member,
The first and second connecting members are formed integrally with the spherical portion so as to have a smaller diameter than the cord and a diameter smaller than the diameter of the spherical portion and extend from both sides of the spherical portion . With a connecting cord ,
The operation cord is characterized in that the connecting portion is formed so as to be separable when a tensile force exceeding a force that normally acts on the operation cord is applied. The spherical portion is formed such that the first fitting portion and the second fitting portion are elastically detachable,
The operation cord according to claim 3 , wherein a base end portion of the first fitting portion is formed in a hemispherical shape with a diameter smaller than the diameter of the cord. A fitting projection is formed at the tip of the first fitting portion, and a fitting hole into which the fitting projection can be fitted is formed at the tip of the second fitting portion. Formed,
In the state in which the fitting protrusion is fitted in the fitting hole, the outer diameter of the first and second fitting portions is formed to be smaller than the diameter of the cord. The operation code according to claim 4 . A blind operated by the operation code according to any one of claims 1 to 5 ,
The operation cord is hung on a pulley rotatably supported by a head box,
A blind configured to be movable up and down by operating the operation cord and rotating the pulley.