JP5622436B2 - Operation code - Google Patents

Description

  The present invention relates to an operation cord suitably used for a horizontal blind, a vertical blind, a roll screen, a screen door, an upper and lower sliding window, an awning, a skylight, or a laundry basket.

  As one type of horizontal blind, an endless operation cord is hung on a pulley that is rotatably supported at one end of the head box, and the pulley is rotated by operating the operation cord, so that the slats in the head box Some of them are transmitted to a drive mechanism, and the slats can be moved up and down and adjusted in angle. A technique is also known in which a vertical blind is operated by rotating an operation cord around a pulley. In addition, operation cords are also used in the type that winds up an insect screen instead of the solar shading material, the elevating mechanism of the raising / lowering window, and the elevating mechanism such as clothes drying.

  Such an operation cord is formed in an endless shape, for example, by welding or crimping both ends of a cord formed of a synthetic resin in a string shape (see, for example, Patent Documents 1 to 3). As described in Patent Document 4, such an operation cord can be driven to rotate by being hooked on a recess formed on the peripheral surface of the pulley inside the pulley case on which the pulley is mounted.

Shoko Sho 62-45025 Patent 2782508 No. 39-23680 Japanese Patent No. 2744563

  Such an endless operation cord that is firmly fixed needs to be cut or swaged to be removed from the blind, so that it is not easy to use it again after being removed and then attached again.

  The present invention has been made in view of such circumstances, and provides an endless operation cord that can be easily replaced.

  According to the present invention, the first connecting portion includes a main cord having one end and the other end, a first connecting portion provided at the one end, and a second connecting portion provided at the other end. And the second connecting portion can be connected to each other directly or via a connecting member, and are attached and detached by relative rotation between adjacent connecting portions or connecting members or relative movement in a direction other than the longitudinal direction of the main cord. An operation code configured to be possible is provided.

  The operation cord of the present invention can be used in an endless manner by connecting the first connecting portion and the second connecting portion at the time of use, and when not in use or at the time of exchanging the operation cord, the adjacent connecting portion Alternatively, the connection between the first connecting portion and the second connecting portion can be released by a relative rotation between the connecting members or a relative movement in a direction other than the longitudinal direction of the main cord to make a non-loop. In addition, "between adjacent connecting parts or connecting members" means that when the first connecting part and the second connecting part are directly connected, the first connecting part and the second connecting part, When the first connecting part and the second connecting part are connected via a connecting member, the first connecting part and the second connecting part are between the first connecting part and the connecting member or between the second connecting part and the connecting member.

  According to the present invention, (1) it is possible to cancel the connection of the connecting portion when the operation cord is not used and to keep it in a non-loop to prevent an accident, and (2) the operation code without cutting the operation cord. Can be removed from the blind or the like, and (3) the operation cord can be easily replaced with another one.

  By the way, there is a known operation cord in which the operation code is separated and becomes non-looped when a sudden impact is applied in the longitudinal direction of the operation cord (for example, Japanese Patent Application Laid-Open No. 2003-184456). The operation code is different in the following points.

(1) An object of the present invention is to solve various problems associated with endless operation codes by easily looping and non-looping the operation codes. Since the operation code is made non-looped when a sudden impact is applied to ensure safety, both have different basic purposes (the operation code of the present invention is also an operation code). It is possible to configure the operation cord to be separated and non-looped when a sudden impact is applied in the longitudinal direction of the cord, but this configuration is not essential.)

(2) The direction of the force applied when looping / unlooping the operation cord of the present invention (referred to as “looping / non-looping force”) is different from the longitudinal direction of the operation cord. -The magnitude of the non-looping force may be smaller than the force applied to the operation cord during normal operation of the operation cord (referred to as "operation force"), and at home without using a special jig The operation code can be easily looped / unlooped. On the other hand, in the above known invention, the fitting protrusions and fitting holes provided at both ends of the operation cord are elastically fitted in the axial direction, so the direction of the looping / non-looping force is determined by the operation cord. It coincides with the longitudinal direction. In this case, the magnitude of the looping / non-looping force needs to be larger than the operating force. This is because if the looping / non-looping force is smaller than the operating force, the loop is unlooped during normal operation of the operation code. When the looping / non-looping force is large, it is difficult to loop without using a jig. Therefore, in the above known invention, it is difficult to loop the operation code at home.

  Hereinafter, various embodiments of the present invention will be described. The various embodiments described below can be combined with each other.

  In one example, the first connecting portion has a shaft-like fitting protrusion, the second connecting portion has a fitting hole that allows the fitting protrusion to be fitted, and the fitting protrusion The part can be fitted into the fitting hole by being inserted into the fitting hole and rotated.

  In one example, the fitting protrusion has an enlarged diameter portion having a larger diameter than a base end portion of the fitting protrusion, and a locking portion that engages with the enlarged diameter portion is provided in the fitting hole. Yes.

  In one example, positioning means for positioning the rotational position of the fitting protrusion is provided on the inner peripheral surface of the swelled portion and the fitting hole.

  In one example, the fitting position between the fitting protrusion and the fitting hole is a position where the fitting protrusion is inserted into the fitting hole and rotated 90 degrees.

  In one example, the first connecting portion has a fitting hole, the second connecting portion has a fitting protrusion that can be fitted into the fitting hole, and the fitting hole has the fitting hole. The mating protrusion is configured to be insertable in a direction perpendicular to the axis of the main cord.

  In one example, the fitting protrusion has a shaft shape, the fitting hole has a diameter that allows the fitting protrusion to be inserted, and the fitting protrusion is extracted in the axial direction of the main cord. An opening groove is provided, and the width of the opening groove is narrower than the diameter of the fitting protrusion.

  In one example, one or both of the first connecting part and the second connecting part has a color different from that of the main cord.

  In one example, the first connecting portion and the second connecting portion can be connected to each other via a connecting member, and each of the first connecting portion and the second connecting portion includes a shaft-like fitting protrusion. And the connecting member has a cylindrical shape that can be fitted so that the fitting protrusions face each other, and the fitting protrusion has a diameter larger than that of the proximal end portion of the fitting protrusion. The connecting member is provided with a locking portion that engages with the expanded diameter portion by inserting and rotating the expanded diameter portion.

  In one example, positioning means for positioning the rotation position of the fitting projection is provided on the inner peripheral surface of the expanded diameter portion and the connecting member.

  In one example, the fitting angles of the pair of fitting protrusions that are fitted to the connecting member are relatively shifted.

  In one example, the fitting angle is an angle at which the center lines of the fitting protrusions are orthogonal to each other.

  In one example, the fitting protrusion is outsert molded on the main cord.

In one example, the fitting protrusion is a solid body.
Code.

  In one example, the first connecting part and the second connecting part can be connected to each other via a connecting member, and each of the first connecting part and the second connecting part has a fitting hole, The connecting member includes a pair of fitting protrusions that can be fitted into the fitting holes, and a shaft portion that connects the fitting protrusions, and the fitting hole includes the fitting protrusions. The portion can be inserted in a direction perpendicular to the axis of the main cord.

  In one example, the fitting protrusion has a shaft shape, the fitting hole has a diameter that allows the fitting protrusion to be inserted, and the fitting protrusion is extracted in the axial direction of the main cord. An opening groove is provided, and the width of the opening groove is narrower than the diameter of the fitting protrusion.

  In one example, the connecting member has a color different from that of the main cord.

  In one example, synthetic resin balls are arranged at equal intervals on the main cord.

  In one example, the main cord has a hemispherical part at each of both ends, the first connecting part is constituted by a first connecting member having a hemispherical part, and the second connecting part has a hemispherical part. The first connecting member and the second connecting member are each fixed to the main cord by fixing the hemispherical portions to the hemispherical portions at both ends of the main cord.

  In one example, the first connecting part is constituted by a first connecting member having a connecting cord, and the second connecting part is constituted by a second connecting member having a connecting cord, the first connecting member and the first connecting member Each of the two connecting members is fixed to the main cord by inserting and sewing the connecting cord into the axial center portion at both ends of the main cord.

  In one example, the first connecting portion and the second connecting portion are formed such that the outer diameter in the lateral direction is the same as or smaller than the maximum diameter of the main cord.

  In one example, the main cord is formed such that its diameter becomes smaller as it approaches each of both ends.

  In one example, the main cord has flange portions at both ends, and the first connecting member and the second connecting portion each have a locking portion that engages with the flange portion. And a second connecting member.

  In one example, the main cord has a ball at each of both ends, and the first connecting member and the second connecting member each have a locking hole that can engage with the ball. And a second connecting member.

  In one example, the outer dimensions of the first connecting member and the second connecting member are larger than the distance between the pulley and the pulley case.

It is a front view which shows the horizontal blind of 1st embodiment. It is a front view which shows the ball chain of 1st embodiment. It is a disassembled perspective view which shows 1st embodiment. It is a front view which shows the 1st connection member of 1st embodiment. It is a bottom view which shows the 1st connection member of 1st embodiment. It is the sectional view on the AA line in FIG. It is sectional drawing which shows the 2nd connection member of 1st embodiment. It is a top view which shows the 2nd connection member of 1st embodiment. It is the BB sectional view taken on the line in FIG. It is sectional drawing which shows the fitting state of the connection member of 1st embodiment. It is a perspective view which shows the state by which the ball chain of 1st embodiment was made into the loop shape. It is a side view which shows the state by which the ball chain of 1st embodiment was made into the non-loop shape. It is a perspective view which shows the modification of the connection part of 1st embodiment. It is sectional drawing which shows the connection part of 2nd embodiment. It is a disassembled perspective view which shows the connection part of 2nd embodiment. It is a front view which shows the 1st connection member of 2nd embodiment. It is a top view which shows the 1st connection member of 2nd embodiment. It is a side view which shows the 1st connection member of 2nd embodiment. It is CC sectional view taken on the line in FIG. It is a front view which shows the 2nd connection member of 2nd embodiment. It is a rear view which shows the 2nd connection member of 2nd 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 the connection member of 2nd embodiment. It is a perspective view which shows the modification of the connection part of 2nd embodiment. It is a front view which shows the ball chain 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 2nd connection member of 3rd embodiment. It is a side view which shows the 2nd connection member of 3rd embodiment. It is a front 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 the GG sectional view taken on the line in FIG. It is the HH sectional view taken on the line in FIG. It is sectional drawing which shows the fitting state of the connection member of 3rd embodiment. It is a disassembled perspective view which shows the connection part of 4th embodiment. It is sectional drawing which shows the fitting state of the connection member of 4th embodiment. It is a front view which shows the code for operation of 5th embodiment. It is a disassembled perspective view which shows the connection part of 5th embodiment. It is a disassembled perspective view which shows the connection part of 6th embodiment. It is a front view which shows the cord for operation of 7th embodiment. It is sectional drawing which shows the connection part of 7th embodiment. It is a disassembled perspective view which shows the connection part of 7th embodiment. It is a front view which shows the state by which the operating cord of 7th Embodiment was made into the non-loop shape. It is a disassembled perspective view which shows the connection part of the cord for operation of 8th embodiment. It is principal part sectional drawing of the connection part shown in FIG. It is a front view showing a ball chain of a ninth embodiment. It is a perspective view which shows the connection part of 9th embodiment. It is a disassembled perspective view which shows the connection part of 9th embodiment. It is a perspective view which shows the connection part of 9th embodiment. It is a side view which shows the connection part of 9th embodiment. It is a perspective view which shows the state by which the ball chain of 9th embodiment was made into the loop shape. It is a side view which shows the state by which the ball chain of 9th embodiment was made into the non-loop shape.

(First embodiment)
Hereinafter, a first embodiment of the present invention will be described with reference to FIGS.
In the present embodiment, the “operation cord” in the claims is the ball chain 9, and the “first connecting portion” is configured by the first connecting member 27 having the hemispherical portion 20, and the “second connecting portion” The “part” is composed of a second connecting member 28 having a hemispherical part 24. On the main cord 14, synthetic resin balls 15 are arranged at equal intervals. The first connecting member 27 and the second connecting member 28 are fixed to the main cord 14 by fixing the hemispherical portions 20 and 24 to the hemispherical portions 15a at both ends of the main cord 14, respectively.
Hereinafter, this embodiment will be described in more detail.

  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 ball chain 9 is hooked on the pulley 8. When the ball chain 9 is operated to rotate the pulley 8 in the forward / reverse direction, 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.

  Next, a specific configuration of the ball chain 9 will be described with reference to FIGS. As shown in FIG. 2, the ball chain 9 has synthetic resin balls 15 formed on a polyester main cord 14 at equal intervals. Each ball 15 is formed by forming a long spherical solid body on the surface of the main cord 14 with a molding machine, and each ball 15 is fixed to the main cord 14 so as not to move.

  Both end portions of the main cord 14 are connected by a connecting portion 16 to form an endless ball chain 9. As shown in FIG. 3, the connecting portion 16 includes a first connecting member 27 and a second connecting member 28.

  In the first connecting member 27, a hemispherical portion 20 having a half shape of the ball 15 is outsert-molded at one end of a connecting cord 19 made of the same material as the main cord 14, and a first fitting portion is formed at the other end. 29 is formed. The interval between the hemispherical portion 20 and the first fitting portion 29 is the same as the interval between the balls 15.

The hemispherical portion 20 and the first fitting portion 29 are formed at both ends of the connecting cord 19 with the same synthetic resin as the ball 15.
The base end portion of the first fitting portion 29 is formed in a hemispherical shape similar to the end portion of the ball 15, and the both ends of the round shaft are parallel to the tip portion of the first fitting portion 29. A cut-out fitting protrusion 30 having a cut-out cross section is formed.

  As shown in FIG. 5 and FIG. 6, an enlarged diameter portion 31 that is expanded in the major axis direction of the bowl shape is formed at the distal end portion of the fitting protrusion 30, and the longer axis direction of the expanded diameter portion 31 is formed. Concave strips 32 are provided in the axial direction of the first fitting portion 29 on the outer peripheral surfaces of both sides of the first fitting portion 29. In addition, a chamfer 33 is formed at the corner of the tip of the bulged portion 31.

  As shown in FIGS. 3 and 7, the second connecting member 28 has a hemispherical portion 24, which is half the shape of the ball 15, at one end of a connecting cord 23 made of the same material as the main cord 14. A second fitting portion 34 is formed in the. The hemispherical portion 24 and the second fitting portion 34 are formed of the same synthetic resin as the ball 15, and the interval between the hemispherical portion 24 and the second fitting portion 34 is the same as the interval between the balls 15.

  The base end portion of the second fitting portion 34 is formed in a hemispherical shape similar to the end portion of the ball 15, and a fitting hole 35 is formed at the center of the distal end surface of the second fitting portion 34. Is formed. As shown in FIG. 8, 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. 7 and 9, 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 in either direction. Then, the recess 32 of the enlarged diameter part 31 is engaged with the protrusion 36 in the fitting hole 35 and positioned, and the enlarged diameter part 31 is engaged with the engaging part 37 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 ball chain 9 during a normal slat raising / lowering operation and a slat angle adjusting operation. Yes. Also, only when a large tensile force exceeding the normal tensile force is applied to the ball chain 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, when the fitting protrusion 30 is fitted in the fitting hole 35, the outer shapes of the first and second fitting portions 29 and 34 are formed to be the same shape as the ball 15.
The hemispherical portions 20 and 24 of the first and second connecting members 27 and 28 are fixed (welded, adhered, etc.) to the hemispherical portion 15a formed at both ends of the main cord 14, and the ball 15 Balls of the same shape are formed. When the fitting protrusion 30 is fitted into the fitting hole 35, an endless ball chain 9 is formed.

  In the ball chain 9 configured as described above, balls having the same shape are formed at the same interval over the entire length of the main cord 14 of the ball chain 9 and the connecting cords 19 and 23 of the connecting portion 16. Therefore, the ball chain 9 can circulate around the pulley 8 without limitation.

With the ball chain configured as described above, the following operational effects can be obtained.
(1) Balls of the same shape are formed at the same interval over the entire length of the main cord 14 of the ball chain 9 and the connecting cords 19 and 23 of the connecting portion 16. Therefore, the ball chain 9 can be rotated around the pulley 8 without limitation, and the slat can be lifted and lowered.
(2) When using the blind, as shown in FIG. 11, the ball chain 9 is used in a loop shape by fitting the first fitting portion 29 and the second fitting portion 34. On the other hand, when the blind is not used, as shown in FIG. 12, the fitting of the first fitting portion 29 and the second fitting portion 34 can be removed to make the ball chain 9 non-looped. Thereby, it is possible to prevent an accident caused by a resident catching his / her foot on the ball chain 9.
(3) When replacing the ball chain 9, the ball chain 9 can be removed without cutting the ball chain 9 by making it non-looped.
(4) When the ball chain 9 is attached, the ball chain 9 can be attached without removing the pulley cover and the pulley by hanging the ball chain 9 on the pulley in a non-looped state. The ball chain 9 may be attached by removing the pulley cover or the pulley.
(5) After the fitting projection 30 of the connecting portion 16 and the fitting hole 35 are disengaged, if the fitting projection 30 is fitted again into the fitting hole 35, the endless ball chain 9 is obtained. Can be easily reproduced.
(6) Since the fitting protrusion 30 is fitted into the fitting hole 35 by inserting the enlarged diameter portion 31 of the fitting protrusion 30 into the fitting hole 35 and rotating it 90 degrees, The holding force for holding the fitting protrusion 30 in the fitting hole 35 can be sufficiently ensured while the operating force for fitting the fitting protrusion 30 in the fitting hole 35 is light.
(7) Since the operation force for fitting the fitting protrusion 30 into the fitting hole 35 is slight, the fitting protrusion 30 is re-fitted into the fitting hole 35 without using a tool. Can do. Therefore, even if the connecting portion 16 is disconnected, the resident can easily return.
(8) The fitting protrusion 30 can be easily fitted into the fitting hole 35 by the chamfer 33 provided at the tip of the fitting protrusion 30.
(9) The base end portion of the fitting protrusion 30 can be rotatably supported by the arc surface of the locking portion 37.

You may implement the said embodiment in the following aspects.
-You may form the 1st fitting part 29 and the 2nd fitting part 34 with the material whose rigidity is larger than a synthetic resin. In this case, the fail-safe function cannot be obtained, but even if a strong force is applied to the ball chain 9, it is not looped, so that it is possible to avoid unlooping unexpectedly.
As shown in FIG. 13, the color of the second fitting portion 34 may be different from that of the main cord 14 and the ball 15. This makes it easy to find the connecting portion 16. Further, the color of the first fitting portion 29 may be different from that of the main cord 14 or the ball 15, and both the colors of the first fitting portion 29 and the second fitting portion 34 are changed to the main cord 14 or The color may be different from that of the ball 15. Further, the colors of the first fitting portion 29 and the second fitting portion 34 may be different from each other. In this case, the difference in the color can be made to correspond to the difference in the operation direction of the ball chain 9 so that the direction of raising or lowering the blind can be displayed.
The first fitting portion 29 and the second fitting portion 34 may be directly outsert-molded at both ends of the main cord 14.
-You may form the same shape by methods other than outsert molding.
-You may use the said connection part 16 for the connection part of the endless operation cord of a solar radiation shielding apparatus.
The connecting portion 16 may be provided at an intermediate portion of the lifting / lowering cord or the operation cord that is suspended from the head box of the horizontal blind and connected to the bottom rail so as to have a fail-safe function.
-In each embodiment, you may make it increase the area of a joint surface by making the joining surface of hemispherical part 15a and hemispherical parts 20 and 24 diagonal with respect to the axial center of hemispherical part 15a and hemispherical parts 20 and 24.

(Second embodiment)
A second embodiment embodying the present invention will be described below with reference to FIGS.
This embodiment is similar to the first embodiment and differs in the configuration of the connecting portion 16. In the present embodiment, the “operation cord” in the claims is the ball chain 9, and the “first coupling portion” and the “second coupling portion” are the first coupling member 41 having the hemispherical portion 20. The “first connecting portion” and the “second connecting portion” are connectable via the second connecting member 42. The pair of first connecting members 41 is fixed to the main cord 14 by fixing the hemispherical portion 20 to the hemispherical portions 15 a at both ends of the main cord 14.

  Hereinafter, this embodiment will be described in more detail.

As shown in FIGS. 14 and 15, the connecting portion 16 has a configuration in which two first connecting members 41 having the same configuration are connected by a cylindrical second connecting member (second fitting portion) 42.
As shown in FIG. 16, the first connecting member 41 is formed with a hemispherical portion 20 having a half shape of the ball 15 at one end of a connecting cord 19 made of the same material as the main cord 14 and at the other end. One fitting portion 43 is formed. A ball 44 having the same shape as the ball 15 is fixed between the hemispherical portion 20 and the first fitting portion 43, and the distance between the first fitting portion 43 and the ball 44 and the ball 44 and the hemispherical portion 20. Is the same as the interval between the balls 15.

The hemispherical portion 20 and the first fitting portion 43 are formed at both ends of the connecting cord 19 with the same synthetic resin as the ball 15.
The base end portion of the first fitting portion 43 is formed in a hemispherical shape similar to the end portion of the ball 15, and a round shaft-like fitting protrusion is formed at the distal end portion of the first fitting portion 43. 45 is formed.

  As shown in FIGS. 15 to 18, 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. 15 and 19, a rotation restricting portion 48 that protrudes in the radial direction of the round shaft is formed in 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 as a second fitting portion having a fitting hole formed in a cylindrical shape with the same synthetic resin as the first fitting portion 43 and the balls 15 and 44, As shown in FIGS. 20 and 21, the opening portions 49 a and 49 b on both sides are formed in a bowl shape that allows insertion of a tip portion including the enlarged diameter portion 46 of the fitting protrusion 45. 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 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. 14, the first connecting member 41 is connected via the second connecting member 42.

In this state, the enlarged diameter portion 46 of the fitting protrusion 45 of each first connecting member engages with the locking portions 51 a to 51 d of the second connecting member 42, and the circular hole of the second connecting member 42. 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 pulling force acting on the ball chain 9 during a normal slat raising / lowering operation and a slat angle adjusting operation. Yes. And only when a large tensile force exceeding the normal tensile force is applied to the ball chain 9, the second connecting member 42 is connected to the second connecting member 42 by the expanded diameter portion 46 of the fitting protrusion 45 due to the elasticity of the synthetic resin of the second connecting 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 shape in the state where the first fitting portion 43 is fitted on both sides of the second connecting member 42 is formed to be the same shape as the ball 15.
The hemispherical portion 20 of the first connecting member 41 is welded and fixed to the hemispherical portions 15 a formed at both ends of the main cord 14 to form a ball having the same shape as the ball 15. When the first connecting member 41 is connected by the second connecting member 42, an endless ball chain 9 is formed.

  In the ball chain 9 configured as described above, balls having the same shape are formed at the same interval over the entire length of the main cord 14 of the ball chain 9 and the connecting cord 19 of the connecting portion 16. Therefore, the ball chain 9 can circulate around the pulley 8 without limitation.

With the ball chain configured as described above, the following operational effects can be obtained.
(1) Balls of the same shape are formed at the same interval over the entire length of the main cord 14 of the ball chain 9 and the connecting cord 19 of the connecting portion 16. Therefore, the ball chain 9 can be rotated around the pulley 8 without limitation, and the slat can be lifted and lowered.
(2) When the blind is not used, the first fitting portion 43 and the second connecting member 42 are disengaged to form a non-loop shape, thereby causing the resident to hook his / her foot on the ball chain 9. Accidents can be prevented.
(3) When replacing the ball chain 9, the ball chain 9 can be removed without cutting the ball chain 9 by making it non-looped.
(4) When the ball chain 9 is attached, the ball chain 9 can be attached without removing the pulley cover or the pulley by hanging the ball chain 9 on the pulley in a non-looped state.
(5) After the coupling portion 16 is disengaged, the first coupling member 41 and the second coupling member 42 can be re-engaged to easily reproduce the endless ball chain 9.
(6) 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. Therefore, the holding force for holding the fitting protrusion 45 on the second connecting member 42 is sufficiently secured while the operating force for fitting the fitting protrusion 45 to the second connecting member 42 is kept light. can do.
(7) The first connecting member 41 connected by the second connecting member 42 is held at an angle at which the center lines of the fitting protrusions 45 are orthogonal to each other. Therefore, when a tensile force is applied to each fitting projection 45, the expanded diameter portion 46 of each fitting projection 45 shifts the openings 49a and 49b of the second connecting member 42 from each other by 90 degrees, that is, the first Since it operates so as to spread from the center of the second connecting member 42 in the four directions, it is easy to secure a holding force.
(8) Since the operating force for fitting the fitting protrusion 45 to the cylindrical second connecting member 42 is slight, the fitting protrusion 45 can be connected to the second connecting member without using a tool. 42 can be re-fitted. Therefore, even if the connecting portion 16 is disconnected, the resident can easily return.

You may implement the said embodiment in the following aspects.
-You may form the 1st fitting part 43 and the 2nd connection member 42 with the material whose rigidity is larger than a synthetic resin. In this case, the fail-safe function cannot be obtained, but even if a strong force is applied to the ball chain 9, it is not looped, so that it is possible to avoid unlooping unexpectedly.
As shown in FIG. 26, the color of the second connecting member 42 may be different from that of the main cord 14 and the ball 15. This makes it easy to find the connecting portion 16. Further, the color of the first fitting portion 43 may be different from that of the main cord 14 or the ball 15, and the colors of both the first fitting portion 43 and the second connecting member 42 are changed to the main cord 14 or the ball. A color different from 15 may be used. Further, the colors of the pair of first fitting portions 43 may be different from each other. In this case, the difference in the color can be made to correspond to the difference in the operation direction of the ball chain 9 so that the direction of raising or lowering the blind can be displayed.
The first fitting portion 43 may be directly outsert-molded at both ends of the main cord 14.
-You may form the same shape by methods other than outsert molding.
-You may use the said connection part 16 for the connection part of the endless operation cord of a solar radiation shielding apparatus.
The connecting portion 16 may be provided at an intermediate portion of the lifting / lowering cord or the operation cord that is suspended from the head box of the horizontal blind and connected to the bottom rail so as to have a fail-safe function.
-In each embodiment, you may make it increase the area of a joint surface by making the joining surface of hemispherical part 15a and hemispherical parts 20 and 24 diagonal with respect to the axial center of hemispherical part 15a and hemispherical parts 20 and 24.
-The ball | bowl 44 may be abbreviate | omitted and you may provide two or more.

(Third embodiment)
A third embodiment embodying the present invention will be described below with reference to FIGS.
This embodiment is similar to the second embodiment and differs in the configuration of the connecting portion 16. In the present embodiment, the “operation cord” in the claims is the ball chain 9, and the “first coupling portion” and the “second coupling portion” are the first coupling member 17 having the hemispherical portion 20. The “first connecting portion” and the “second connecting portion” are connectable via the second connecting member 18. The pair of first connecting members 17 is fixed to the main cord 14 by fixing the hemispherical portion 20 to the hemispherical portions 15 a at both ends of the main cord 14.
Hereinafter, this embodiment will be described in more detail.

  As shown in FIG. 27, the ball chain 9 has synthetic resin balls 15 formed on a polyester main cord 14 at equal intervals. Each ball 15 is formed by forming a long spherical solid body on the surface of the main cord 14 with a molding machine, and each ball 15 is fixed to the main cord 14 so as not to move.

  Both end portions of the main cord 14 are connected by a connecting portion 16 to form an endless ball chain 9. As shown in FIG. 28, the connecting portion 16 has a configuration in which two first connecting members 17 having the same configuration are connected by a second connecting member 18.

  In the first connecting member 17, a hemispherical portion 20 having a half shape of the ball 15 is outsert-molded at one end of a connecting cord 19 made of the same material as the main cord 14, and a first fitting portion is formed at the other end. 21 is formed. The interval between the first fitting portion 21 and the hemispherical portion 20 is the same as the interval between the balls 15.

  The first fitting portion 21 is a ball having the same shape as the ball 15 provided with a fitting recess 72, and the second connecting member 18 is fitted to the fitting recess 72. In this configuration, the mating protrusions 73 are provided at both ends of the shaft portion 74.

  The second connecting member 18 is integrally formed of synthetic resin, and as shown in FIGS. 29 and 30, round shaft-like fitting protrusions 73 are formed in line symmetry at both ends of the shaft portion 74, The central axis of the round shaft and the central axis of the shaft portion 74 are formed so as to be orthogonal to each other.

  As shown in FIGS. 31 to 34, the fitting recess 72 is formed with a fitting hole 75 in a direction orthogonal to the central axis of the connecting cord 19, and the fitting hole 75 has the fitting protrusion 73. It has a diameter that can be easily inserted.

  The fitting hole 75 is opened toward the opposite side of the connecting cord 19 by an opening groove 76 having a narrower groove width than the diameter of the fitting hole 75, and the opening groove 76 has the second connecting member 18. An insertion hole 77 through which the shaft portion 74 can be inserted is formed.

  As shown in FIG. 28, the first and second connecting members 17, 18 configured in this way have a fitting protrusion of the second connecting member 18 with respect to the fitting hole 75 of the first connecting member 17. When the portion 73 is inserted in a direction orthogonal to the connecting cord 19, the first connecting member 17 is connected by the second connecting member 18.

  In this state, the round shaft-like fitting protrusion 73 is held in the fitting hole 75, and the holding force is a normal tensile force acting on the ball chain 9 during a normal slat raising / lowering operation and a slat angle adjusting operation. The mating protrusion 73 is set so as not to be detached from the fitting hole 75. Only when a large pulling force exceeding the normal pulling force is applied to the ball chain 9, the opening groove 76 is pushed and expanded by the fitting protrusion 73 by the elasticity of the synthetic resin of the first connecting member 17. The mating protrusion 73 is configured to be detached from the fitting hole 75.

Further, the outer shape in a state where the fitting protrusion 73 is fitted to the first fitting portion 21 is formed to be substantially the same shape as the ball 15.
The hemispherical portion 20 of the first connecting member 17 is welded and fixed to a hemispherical portion 15 a that is outsert-molded at both ends of the main cord 14 to form a ball having the same shape as the ball 15. When the first connecting member 17 is connected by the second connecting member 18, an endless ball chain 9 is formed.

In the ball chain 9 of this embodiment, the following operational effects can be obtained.
(1) Balls of the same shape are formed at the same interval over the entire length of the main cord 14 of the ball chain 9, the connecting cord 19 of the connecting portion 16, and the shaft portion 24. Therefore, the ball chain 9 can be rotated around the pulley 8 without limitation, and the slat can be lifted and lowered.
(2) By preventing the fitting protrusion 73 and the fitting hole 75 from being fitted into a non-loop shape when the blind is not in use, an accident caused by the occupant catching his / her foot on the ball chain 9 is prevented. Can do.
(3) When replacing the ball chain 9, the ball chain 9 can be removed without cutting the ball chain 9 by making it non-looped.
(4) When the ball chain 9 is attached, the ball chain 9 can be attached without removing the pulley cover or the pulley by hanging the ball chain 9 on the pulley in a non-looped state.
(5) When a large tensile force exceeding the normal tensile force is applied to the ball chain 9, the fitting projection 73 of the connecting portion 16 and the fitting hole 75 are disengaged. Therefore, when the endless edge of the ball chain 9 is caught by a resident or other moving object moving in the room, the ball chain 9 is cut to ensure the safety of the resident and the pulley on which the ball chain 9 is hung. A fail-safe function for preventing damage such as 8 can be provided.
(6) After the fitting protrusion 73 of the connecting portion 16 and the fitting hole 75 are disengaged, if the fitting protrusion 73 is refitted into the fitting hole 75, the endless ball chain 9 is obtained. Can be easily reproduced.
(7) Since the fitting protrusion 73 is inserted and fitted into the fitting recess 72 of the first connecting member 17 in a direction orthogonal to the extending direction of the connecting cord 19, the fitting protrusion 73 73 can be fitted to the first connecting member 17 with a slight operating force, and a sufficient holding force for holding the fitting protrusion 73 on the first connecting member 17 can be ensured.
(8) When fitting the fitting protrusion 73 into the fitting hole 75, a tool or the like is not required. Therefore, the assembling work of the ball chain 9 and the work of re-fitting the fitting protrusion 73 into the fitting hole 75 can be easily performed.

You may implement the said embodiment in the following aspects.
-You may form the 1st fitting part 21 and the 2nd connection member 18 with the material whose rigidity is larger than a synthetic resin. In this case, the fail-safe function cannot be obtained, but even if a strong force is applied to the ball chain 9, it is not looped, so that it is possible to avoid unlooping unexpectedly.
The color of the second connecting member 18 may be different from that of the main cord 14 and the ball 15. This makes it easy to find the connecting portion 16. Further, the color of the first fitting portion 21 may be different from that of the main cord 14 and the ball 15, and the colors of both the first fitting portion 21 and the second connecting member 18 are changed to the main cord 14 and the ball 15. A color different from 15 may be used. Further, the colors of the pair of first fitting portions 21 may be different from each other. In this case, the difference in the color can be made to correspond to the difference in the operation direction of the ball chain 9 so that the direction of raising or lowering the blind can be displayed.
The first fitting portion 21 may be directly outsert-molded at both ends of the main cord 14.
-You may form the same shape by methods other than outsert molding.
The second connecting member 18 may be formed with fitting projections 23 at both ends of a cord made of the same material as the main cord 14.
-As for the 2nd connection member 18, you may integrally mold the fitting protrusion 73 and the axial part 74 with the synthetic resin from which hardness differs. In this case, the fitting protrusion 73 is made of a hard synthetic resin, and the shaft portion 74 is made of a soft synthetic resin.
The fitting protrusion 73 may be a shaft having a polygonal cross section in addition to a round shaft.
-The joint surface of the hemispherical part 15a and the hemispherical part 20 may be inclined with respect to the axial center of the hemispherical part 15a and the hemispherical part 20 to increase the area of the joint surface.
The connecting portion 16 may be provided at an intermediate portion of the lifting / lowering cord or the operation cord that is suspended from the head box of the horizontal blind and connected to the bottom rail so as to have a fail-safe function. In this case, the connecting cord 19 of the first connecting member 17 is sewn to the end of the lifting / lowering cord or the operation cord, and the first connecting member 17 is connected by the second connecting member 18.

(Fourth embodiment)
A fourth embodiment embodying the present invention will be described below with reference to FIGS.
The connecting portion 16 of the ball chain 9 of the present embodiment is similar to the third embodiment from the viewpoint of the fitting structure of the first connecting member 17 and the second connecting member 18. However, the connecting portion 16 of the present embodiment is a two-piece structure including a first connecting member 17 having a fitting recess 72 and a second connecting member 18 having a fitting protrusion 73 that fits the fitting recess 72. It is configured.
The first fitting portion 21 and the fitting protrusion 73 may be directly outsert-molded at both ends of the main cord 14. Other functions and modifications are basically the same as those of the third embodiment.

(Fifth embodiment)

A fifth embodiment embodying the present invention will be described below with reference to FIGS.
The present embodiment is the same as the first embodiment in terms of the fitting structure of the connecting portion 16, but the “operation cord” is the ball chain 9 in the first embodiment, whereas the present embodiment In the form, the cross-sectional area does not substantially change along the longitudinal direction which is not a ball chain as shown in FIG. 38 (may be slightly changed. For example, the cross-sectional area in the vicinity of the connecting portion 16 is slightly different as shown in FIG. The operation code 98 may be reduced). In the present embodiment, the “first connecting portion” in the claims is composed of the first connecting member 27 having the connecting cord 19, and the “second connecting portion” is the first connecting portion having the connecting cord 23. It is composed of two connecting members 28. The first connecting member 27 and the second connecting member 28 are fixed to the main cord 14 by inserting the connecting cords 19 and 23 into the shaft center portions at both ends of the main cord 14 and sewing them.

  As shown in FIG. 38, the operation cord 98 is formed in an endless shape by connecting both ends of the main cord 14 with a connecting portion 16. The main cord 14 is a core 86a formed of polyester, nylon or the like and covered with an outer cord 86b knitted with polyester, and the linearity of the operation cord 98 is secured by the core 86a. Durability in the direction of elongation is ensured.

As shown in FIG. 39, the connecting portion 16 includes a first connecting member 27 and a second connecting member 28. 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 86 a of the main 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.
The second connecting member 28 has a second fitting portion 34 formed of the same material as the first fitting portion 29 at one end of a connecting cord 23 similar to the connecting cord 19. A base end portion of the second fitting portion 34 is formed in a hemispherical shape, and a fitting hole 35 is formed at a distal end portion of the second fitting portion 34.
In order to attach the first and second connecting members 27 and 28 to the main cord 14, as shown in FIG. 38, the core 86a at both ends of the main cord 14 is removed to make a space in the shaft center portion. The connecting cords 19 and 23 of the first and second connecting members 27 and 28 are inserted into the spaces. When the outer cord 86b 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 main cord 14.

You may implement the said embodiment in the following aspects.
The first fitting portion 29 and the second fitting portion 34 may be directly outsert-molded at both ends of the main cord 14.
-You may form the same shape by methods other than outsert molding.
The first connecting member 27 and the second connecting member 28 may be fixed to the main cord 14 by a method other than inserting the connecting cords 19 and 23 into the shaft center portions at both ends of the main cord 14 and sewing them. Good.

(Sixth embodiment)
A sixth embodiment embodying the present invention will be described below with reference to FIG.
This embodiment is similar to the fifth embodiment and differs in the configuration of the connecting portion 16. In the present embodiment, the “operation cord” in the claims is the operation cord 98, and the “first coupling portion” and the “second coupling portion” are the first coupling member 41 having the coupling cord 19. The “first connecting portion” and the “second connecting portion” are connectable via the second connecting member 42. The pair of first connecting members 41 is fixed to the main cord 14 by inserting the connecting cord 19 into the axial center portions of both ends of the main cord 14 and sewing them. The fitting structure of the connecting portion 16 of this embodiment is the same as that of the third embodiment. The method of fixing the first connecting member 41 to the main cord 14 is the same as in the fifth embodiment.
According to the present embodiment, the same operational effects as in the fifth embodiment are obtained for the operation cord, and the same operational effects as in the second embodiment are obtained for the connecting portion 16.

(Seventh embodiment)
A seventh embodiment embodying the present invention will be described below with reference to FIGS.
The present embodiment is the same as the sixth embodiment in terms of the fitting structure of the connecting portion 16, but the configuration of the operation cord 98 and the method of fixing the first connecting member 41 to the main cord 14. Is different. In the present embodiment, the “first connecting portion” and the “second connecting portion” in the claims include a pair of first first portions having a locking portion 99 that engages with the flange portion 81 of the main cord 14. The connecting member 41 is configured so that the “first connecting portion” and the “second connecting portion” can be coupled via the second connecting member 42. The pair of first connecting members 41 can be fixed by outsert molding at both ends of the main cord 14 on which the flange portion 81 is formed.

  FIG. 41 is a front view showing an operation cord 98 according to the embodiment of the present invention. FIG. 42 is a cross-sectional view showing connecting portion 16 constituting operating cord 98 according to the embodiment of the present invention. FIG. 43 is an exploded perspective view showing the connecting portion 16 constituting the operation cord 98 according to the embodiment of the present invention.

  As shown in FIG. 41, the operation cord 98 is formed in an endless shape by connecting both ends of the main cord 14 with a connecting portion 16. The main cord 14 has a cylindrical shape, and both ends thereof are tapered. For example, a polyester resin can be suitably used for the main cord 14. However, the main cord 14 is not particularly limited as long as the material thereof is a thermoplastic resin having a predetermined strength or more, and may be made of a resin other than a polyester resin or a polyamide resin. Further, a core formed of a polyester resin or a polyamide resin may be covered with an outer cord knitted with a polyester resin. With this configuration, the linearity of the operation cord 98 is ensured by the center core, and the durability in the extending direction can be secured.

  As shown in FIGS. 42 and 43, the connecting portion 16 has a configuration in which a pair of first connecting members 41 are connected by a second connecting member 42 installed between them. The connecting portion 16 in which these three members are formed has a columnar shape, and is formed such that its outer diameter, that is, the outer diameter M in the lateral direction is smaller than the maximum diameter P of the main cord 14. However, the outer diameter M of the connecting portion 16 may be formed to be the same as the maximum diameter P of the main cord 14. Since the connecting portion 16 is formed as described above, whether the outer diameter M in the lateral direction is the same as the maximum diameter P of the main cord 14 when the operation cord 98 is operated to rotate the pulley in the forward and reverse directions. Alternatively, the connecting portion 16 of the operation cord 98 formed so as to be small has little fear of coming into contact with the inside of the pulley case. In addition, the risk of the connecting portion 16 being caught in a recess formed in the peripheral surface of the pulley is reduced. As a result, the operation cord 98 can be smoothly circulated. Further, the length of the connecting portion 16 in the vertical direction is formed to be 1.2 to 2.5 times the maximum diameter P of the main cord 14. For example, when the maximum diameter P of the main cord 14 is 5.5 mm, the length of the connecting portion 16 may be 7 mm. For this reason, the pulley can be rotated more smoothly without the connecting portion 16 hitting the inside of the pulley case.

  In addition, flange portions 81 for fitting the first connecting members 41 are provided at the tips of the tapered portions of the both ends of the main cord 14 made of thermoplastic resin. In this embodiment, as shown in FIG. 42, the flange portion 81 is formed in a ring shape so as to have a larger diameter than the smallest diameter portion on the tip side that is tapered and smaller than the largest diameter P. . The flange portion 81 is for sufficiently securing the bonding strength with the first connecting member 41. If the strength can be sufficiently secured, the shape of the flange portion 81 is particularly limited. Alternatively, it may be a gear shape. Further, the outer diameter R1 of the flange portion 81 is formed to be between 1.05 and 1.3 times the minimum diameter R2 of the main cord 14. The value of R1 / R2 is preferably set to 1.1 to 1.2 in terms of the ease of forming the flange portion 81 and the strength of the outsert molding with the first connecting member 41.

  Various methods can be employed for attaching the first connecting member 41 to the tips of both ends of the main cord 14. For example, first, heat is applied in a state where the tips of both ends of the main cord 14 are compressed, and a ring-shaped flange portion 81 is formed at the tip of the main cord 14 using a prepared mold. And the 1st connection member 41 which has the latching | locking part 99 so that the said flange part 81 may be covered is outsert-molded. When such outsert molding is performed, both ends of the main cord 14 are fixed to the first connecting member 41 with high bonding strength. However, the method of integrating the first connecting member 41 with the main cord 14 is not limited to the method described above. For example, the first connecting member 41 having the locking portion 99 may be formed in advance, and the flange portions 81 formed at both ends of the main cord 14 may be fitted to the first connecting member 41.

  Further, as shown in FIG. 42, the diameter of the main cord 14 gradually decreases as the distance between each flange portion 81 and the portion having the maximum diameter P of the main cord 14 approaches each flange portion 81. Such a reduced diameter portion 80 is formed. Therefore, both end portions of the main cord 14 are easily coupled to the first connecting member 41 constituting the connecting portion 16, and the outer diameter M in the lateral direction of the connecting portion 16 is set to the maximum diameter P of the main cord 14. It is easy to make it the same or smaller.

The fitting structure of the connection part 16 of this embodiment is the same as that of the second embodiment, and the same effect as that of the second embodiment can be obtained for the connection part 16.
When the blind is used, the first connecting member 41 and the second connecting member 42 are connected to use the operation cord 98 in a loop shape. On the other hand, when the blind is not used, as shown in FIG. 44, the operation cord 98 can be made non-looped by releasing the connection between the first connecting member 41 and the second connecting member 42. As a result, it is possible to prevent an accident caused by the resident being caught in the operation cord 98. Further, the operation cord 98 can be easily attached and detached.

(Eighth embodiment)
Hereinafter, an eighth embodiment of the present invention will be described with reference to FIGS. 45 and 46. FIG.
This embodiment is similar to the sixth embodiment, and differs in the configuration of the connecting portion 16. In the present embodiment, the “operation cord” in the claims is the operation cord 98, and the “first connecting portion” has a first engaging portion that engages with the flange portion 81 of the main cord 14. The “second connecting portion” is the second connecting member 28 having a locking portion that engages with the flange portion 81 of the main cord 14. The fitting structure of the connecting portion 16 of this embodiment is the same as that of the first embodiment. The method of fixing the first connecting member 27 and the second connecting member 28 to the main cord 14 is the same as in the seventh embodiment.
According to this embodiment, the same operational effects as those of the seventh embodiment are obtained for the operation cord, and the same operational effects as those of the first embodiment are obtained for the connecting portion 16.

(Ninth embodiment)
The ninth embodiment embodying the present invention will be described below with reference to FIGS.
In the present embodiment, the “operation cord” in the claims is the ball chain 9, and the “main cord” is the main cord 14 having the balls 15 b at both ends, and the “first connecting portion” and “ Each of the “second connecting portions” is composed of a first connecting member 41 having a locking hole 82 that can engage the ball 15b at the end of the main cord 14, and the “first connecting portion” and The “second connecting portion” can be coupled via the second connecting member 42. The pair of first connecting members 41 are fixed to the main cord 14 by engaging the balls 15b at the ends of the main cord 14 with the locking holes 82, respectively.
Hereinafter, this embodiment will be described in more detail.

The ball chain 9 shown in FIG. 47 has synthetic resin balls 15 formed on a polyester main cord 14 at equal intervals.
Each ball 15 is formed by forming a long spherical solid body on the surface of the main cord 14 with a molding machine, and each ball 15 is fixed to the main cord 14 so as not to move.

  Both end portions of the main cord 14 are connected by a connecting portion 16 to form an endless ball chain 9. As shown in FIGS. 48 and 49, the connecting portion 16 includes two first connecting members 41 having the same configuration and a cylindrical second connecting member 42, and balls 15b formed at both ends of the main cord 14. Are to be connected.

  The connecting portion 16 connects the main cord 14 to form an endless ball chain 9, and in a state where the ball chain 9 is hooked on a pulley, the connecting portion 16 abuts on the pulley and the pulley case, and a roll screen or the like. Acts as a stopper for setting the upper limit position of the lifting operation. And the 1st connection member 41 is formed with the external dimension which cannot pass between a pulley and pulley cases.

Here, a specific configuration of the first connecting member 41 will be described with reference to FIGS. 50 to 51.
The first connecting member 41 is formed of a synthetic resin in a substantially rectangular parallelepiped shape, and a locking hole 82 opened in an oval shape is provided on the upper surface thereof so that the ball 15b can be inserted. As shown in FIG. 51, an insertion hole 83 connected to the locking hole 82 is opened at the center of the base end surface of the first connection member 41, and the insertion hole 83 is connected to the first connection via the guide groove 84. An opening is formed on the upper surface of the member 41.

  Then, when the ball 15b formed at the end of the main cord 14 is inserted into the locking hole 82 and the main cord 14a connected to the ball 15b is inserted into the insertion hole 83 from the guide groove 84, the ball 15b is locked. In the hole 82, it is held in the direction of the arrow shown in FIG.

  The fitting structure of the connecting portion 16 is the same as in the second embodiment.

In the ball chain 9 configured as described above, the same effects as those of the second embodiment can be obtained.
When the blind is used, as shown in FIG. 52, the first connecting member 41 and the second connecting member 42 are connected to use the ball chain 9 in a loop shape. On the other hand, when the blind is not used, as shown in FIG. 53, the connection of the first connecting member 41 and the second connecting member 42 can be released to make the ball chain 9 non-looped. Thereby, it is possible to prevent an accident caused by a resident catching his / her foot on the ball chain 9. Further, the ball chain 9 can be easily attached and detached.

  Further, as a specific effect of the present embodiment, by forming the first connecting member 41 with an outer dimension that cannot pass between the pulley and the pulley case, as shown in FIG. Even when the second connecting member 42 is separated, the first connecting member 41 is disposed at both ends of the ball chain 9, so that the ball chain 9 can be prevented from coming off from the pulley. . In addition, what is necessary is just to take out the ball | bowl 15b from the latching hole 82, when removing the ball chain 9 from a pulley.

You may implement the said embodiment in the following aspects.
-Ball chain 9 is good also as a string-like cord provided with ball 15b only at the end. Moreover, you may make it a code | cord | chord as shown in 5th embodiment-8th embodiment.
-You may make the fitting structure of the connection part 16 into a structure as shown in 1st, 3rd or 4th embodiment.

  Although the present invention has been described based on various embodiments so far, the scope of the present invention is not limited to the embodiments shown here. Moreover, the description given in one embodiment is applicable to another embodiment as long as it is within the scope of the purpose.

  DESCRIPTION OF SYMBOLS 9 ... Ball chain, 12 ... Pulley, 14, 14a ... Main cord, 15, 15b, 44 ... Ball, 15a, 20, 24 ... Hemisphere part, 16 ... Connection part, 17, 27, 41 ... First connection member, 18, 28, 42 ... second connecting member, 19 ... connecting cord, 21, 29 ... first fitting part, 30, 45 ... fitting protrusion, 23 ... connecting cord, 34 ... second fitting part 35, 75 ... fitting hole, 72 ... fitting recess, 74 ... shaft part, 76 ... opening groove, 77 ... insertion hole, 81 ... flange part, 82 ... locking hole, 83 ... insertion hole, 84 ... guide groove , 98 ... Operation cord, 99 ... Locking part

Claims (15)

A main code having first and second ends, a first connecting portion provided on the one end, a second operation code Ru and a connecting portion of which is provided on the other end,
The first and second connecting portions are made of synthetic resin,
The first connecting portion and the second connecting portion can be connected to each other directly or via a connecting member made of synthetic resin , and in relative rotation between adjacent connecting portions or connecting members or in the longitudinal direction of the main cord. It is configured to be detachable by relative movement in a non-direction ,
Synthetic resin balls are arranged at equal intervals on the main cord,
Substantially the same shape der outer shape is said ball in a state where the second connecting portion and the first connecting portion is connected is, the second connecting portion and the first connecting portion is normally of the operation code An operation cord configured to be separable by elastic deformation of the synthetic resin caused by an excessive tensile force exceeding a normal tensile force applied to the operation cord during operation. The first connecting portion has a shaft-like fitting protrusion, the second connecting portion has a fitting hole that allows the fitting protrusion to be fitted, and the fitting protrusion is The operation cord according to claim 1, wherein the operation cord can be fitted into the fitting hole by being inserted into the fitting hole and rotated. The fitting protrusion has an enlarged diameter portion having a diameter larger than a base end portion of the fitting protrusion, and a locking portion that engages with the enlarged diameter portion is provided in the fitting hole. 2. The operation code according to 2. The first connecting portion has a fitting hole, the second connecting portion has a fitting protrusion that can be fitted into the fitting hole, and the fitting hole is formed by the fitting protrusion. The operation cord according to claim 1, wherein the operation cord is configured to be insertable in a direction perpendicular to the axis of the main cord. The operation cord according to claim 1, wherein one or both of the first connecting portion and the second connecting portion have a color different from that of the main cord. The first connecting portion includes a shaft-shaped fitting protrusion, the second connecting portion includes a fitting hole that allows the fitting protrusion to be fitted, and the fitting protrusion includes the fitting. The first connecting portion is provided with a display means for displaying that the fitting protrusion is fitted in the fitting hole, by inserting it into the hole and turning it so that it can be fitted into the fitting hole. The operation code according to claim 1.   The first and second connecting portions are formed of a synthetic resin, and the second connecting portion is formed in a cylindrical shape that allows fitting protrusions of the pair of first connecting portions to be fitted from both sides. The first and second connecting portions are provided with positioning means for positioning the fitting protrusion at the fitting position, and are provided as the display means in the first connecting portion, respectively. The operation cord according to claim 6, further comprising a fitting mark positioned so as to face each other during the positioning operation.   The operation cord according to claim 7, wherein the fitting mark is a recess provided in the vicinity of a joint surface with the second connecting portion on the outer peripheral surface of the first connecting portion.   The first and second connecting portions are formed of synthetic resin, and the first and second connecting portions are provided with positioning means for positioning the fitting protrusions at the fitting positions, The operation cord according to claim 6, further comprising a fitting mark provided at each of the first and second connecting portions and positioned so as to face each other during a positioning operation by the positioning means.   10. The fitting mark is a recess provided in the vicinity of the joint surface of the first and second connecting portions on the outer peripheral surfaces of the first and second connecting portions. Operation code. In a solar radiation shielding device that hangs an endless operation cord from a pulley that is rotatably supported by a head box, and drives the shielding material by rotating the pulley based on the operation of the operation cord.
The operation cord is an operation cord according to claim 1, and is a ball chain which is connected with a connection ball having a fail-safe function to be endless,
An operating device for a solar shading device, wherein a pitch between the connecting ball and an adjacent ball is larger than a pitch between other balls.   The pitch between the concave and convex portions of the pulley and the pitch between the balls of the ball chain are the same, and the pitch between the connecting ball and the adjacent ball is larger than the pitch between the other balls. Item 12. A solar radiation shielding device operating device according to Item 11.   13. The operating device for a solar radiation shielding device according to claim 12, wherein a diameter of the connecting ball is increased so that a pitch between the connecting ball and a ball adjacent to the connecting ball is larger than a pitch between other balls.   13. The solar radiation according to claim 12, wherein a connecting cord for connecting the connecting ball and the adjacent ball is lengthened so that a pitch between the connecting ball and the adjacent ball is larger than a pitch between other balls. Operating device for shielding device.   The diameter of the connecting ball is increased and the connecting cord for connecting the connecting ball and the adjacent ball is lengthened so that the pitch between the connecting ball and the adjacent ball is larger than the pitch between the other balls. The operation device of the solar radiation shielding apparatus of Claim 12 characterized by these.