WO2011027407A1

WO2011027407A1 - Operation cord and lifting device using same

Info

Publication number: WO2011027407A1
Application number: PCT/JP2009/004397
Authority: WO
Inventors: 中村元; 上原祥次郎
Original assignee: 立川ブラインド工業株式会社
Priority date: 2009-09-04
Filing date: 2009-09-04
Publication date: 2011-03-10
Also published as: EP2474701A4; CN102575497B; CN102575497A; EP2474701A1; JPWO2011027407A1; EP2474701B1

Abstract

Provided are an operation cord which can smoothly turn and has a fail safe function, and a lifting device using the operation cord. An operation cord (9) which can be changed to an endless form by connecting at a connecting section (20) opposite ends of a cord (14). The connecting section (20) is configured such that the outer diameter in the lateral direction thereof is the same as or less than the maximum diameter of the cord (9).

Description

Operation cord and lifting device using the same

The present invention relates to an operation cord suitably used for a horizontal blind, a vertical blind, a roll screen, a screen door, a vertical sliding window, an awning, a skylight, or a clothesline, and a lifting device using the same.

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 operation cord is operated to rotate the pulley, thereby moving the slat up and down. There is one that can adjust the angle. In addition, a technique of operating a vertical blind by turning an operation cord around a pulley is also known (see Patent Document 1).

Such an operation cord is formed into an endless shape, for example, by welding or sewing both ends of a cord formed in a string shape with a synthetic resin. Such an operation cord can be driven to rotate by being hooked on a recess formed on the peripheral surface of the pulley without contacting the inside of the pulley case on which the pulley is mounted.

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 moving in the room or other moving objects. In particular, there is a high risk of entangled or falling around the neck for children or the elderly. In response to this problem, the following operation codes have been proposed. In an operation cord in which a support frame for suspending a sunshade member such as a roll screen, a blind, or a curtain is arranged on the wall surface of the window peripheral surface, and these sunshade members hanging from the support frame are suspended by opening and closing left and right or up and down. A removable safety device that is disassembled when a sudden force is applied in the extending direction of the operation cord is disposed on the operation cord (see Patent Document 2). *

Japanese Patent Laid-Open No. 05-010081 (claims, etc.) Japanese Patent Laid-Open No. 2003-184456 (claims, etc.)

However, in the case of the operation code disclosed in Patent Document 2, the fail-safe function can be realized to some extent, but there are the following problems. That is, with such an operation code, the safety device is thicker than the operation code, which causes inconvenience in terms of handling. For example, in the case of a horizontal blind that moves the operation cord around the pulley one or more times to move the slats up and down, it comes into contact with the inside of the pulley case or the safety device is caught in the recess formed on the peripheral surface of the pulley. Or For this reason, there exists a problem that trouble arises in raising / lowering operation and angle adjustment operation of a slat. Also, there is a high risk of pulley damage.

Accordingly, the present invention has been made to solve the above-described problems, and an object of the present invention is to enable smooth circulation of the operation code and to provide an operation code having a fail-safe function. And it is providing the raising / lowering apparatus using the same.

In order to achieve the above object, the present invention provides an operation cord that can be made endless by connecting both ends of a cord with a connecting portion, and the connecting portion has an outer diameter in the lateral direction of the cord. The operation cord is formed to be equal to or smaller than the maximum diameter.

By using the operation code as described above, the connecting portion does not interfere with the circulation, and the operation code can be smoothly circulated. Also, by adjusting the connecting force of the connecting part, when a sudden force is involved in the extension direction of the operation cord, it can be divided at the connecting part and can have a fail-safe function. .

Further, in another invention, in addition to the above-described invention, both end portions of the cord are operation cords formed such that the diameter thereof becomes narrower as the connecting portion is approached.

By using such an operation cord, both ends of the cord can be reliably coupled to the connecting portion, and the outer diameter in the lateral direction of the connecting portion is equal to or smaller than the maximum diameter of the cord. Easy to secure.

Further, in addition to the above-described invention, another invention is an operation cord in which the length of the connecting portion in the vertical direction is 1.2 to 2.5 times the maximum diameter of the cord.

¡By using such an operation cord, the pulley can be rotated more smoothly without the connecting portion hitting the inside of the pulley case.

In addition to the above-mentioned invention, another invention is the first joint main body provided at one end of the cord, the second joint main body provided at the other end of the cord, and the first joint. A joint ring installed between the main body and the second joint main body, each of the first joint main body and the second joint main body having a shaft-shaped fitting protrusion, The ring has a fitting hole in which each fitting protrusion can be fitted, and the fitting protrusion can be engaged with the fitting hole by being inserted into the fitting hole and rotated. The first joint body, the second joint body, and the joint ring are operation cords formed such that the outer diameters in the lateral direction are the same as or smaller than the maximum diameter of the cords.

Such an operation code makes it possible to smoothly circulate the operation code and provide an operation code with a fail-safe function. That is, the connection portion of the operation cord formed so that the outer diameter in the lateral direction is the same as or smaller than the maximum diameter of the cord is less likely to come into contact with the inside of the pulley case. Further, the connecting portion does not get caught in a recess formed on the peripheral surface of the pulley. The connecting portion includes a first joint main body, a second joint main body, and a joint ring installed between the first joint main body and the second joint main body. Since the shaft-like fitting protrusions provided on the main body and the second joint body can be engaged with the fitting holes by inserting and turning the fitting protrusions provided on the joint ring, When a large tensile force exceeding a normal tensile force is applied to the operation cord, it is possible to easily remove the fitting protrusion from the fitting hole and the fitting hole. Therefore, when the endless edge of the operation cord is caught by a resident or other moving object moving in the room, it becomes easier to ensure the safety of the occupant by cutting the operation cord at the connecting portion, and the operation code is hung. This makes it easy to prevent damage to pulleys.

In another invention, in addition to the above-described invention, the fitting position between the fitting protrusion and the fitting hole is an operation in which the fitting protrusion is inserted into the fitting hole and rotated 90 degrees. It is a code.

By using such an operation code, it is possible to secure a sufficient holding force for holding the fitting protrusion in the fitting hole while minimizing the operation force for fitting the fitting protrusion into the fitting hole. Can do.

Further, in another invention, in addition to the above-described invention, the first joint main body and the second joint main body are operation cords that are outsert-molded at one end and the other end of the cord, respectively.

¡By using such an operation cord, the first joint body and the second joint body can each increase the strength of bonding with the cord.

In another invention, in addition to the above-described invention, the cord is made of a thermoplastic resin, and the first joint main body and the second joint main body are fitted to the ends of both ends of the cord, respectively. The operation cord is provided with a flange portion.

By using such an operation cord, the first joint body and the second joint body can sufficiently secure the bonding strength with the cord via the respective flange portions.

In another invention, in addition to the above-described invention, the first joint body, the second joint body, and the joint ring are formed of a synthetic resin, and the fitting protrusion has a base end portion of the fitting protrusion. An operation code is provided in which an enlarged diameter portion having a large diameter is provided, and a first locking portion and a second locking portion that are engaged with the respective expanded diameter portions are provided in the fitting holes.

By using such an operation cord, the expanded diameter portion of the fitting protrusion can be elastically fitted and held by the first locking portion and the second locking portion. As a result, a sufficient holding force for holding the fitting protrusion in the fitting hole can be ensured.

Further, in another invention, in addition to the above-described invention, the first locking portion and the second locking portion are provided in a mirror-symmetrical manner by being shifted by 90 degrees from each other in both openings of the fitting hole. The operation code is as follows.

By using such an operation code, the first joint main body and the second joint main body fitted by the joint ring are held in a state where the fitting protrusions are shifted from each other by 90 degrees. Therefore, when a tensile force acts on each fitting protrusion, the expanded diameter portion of each fitting protrusion moves the opening of the joint ring 90 degrees from each other via the first locking portion and the second locking portion. It works to spread out in the shifted direction. For this reason, it becomes easy to ensure holding force.

Further, in another invention, in addition to the above-described invention, the operation cord is provided with positioning means for positioning the rotation position of the fitting protrusion on the inner peripheral surface of the enlarged diameter portion and the fitting hole.

By using such an operation code, the holding force for holding the fitting protrusion in the fitting hole can be sufficiently secured by determining the rotation position of the fitting protrusion.

Further, the invention of the present invention is an elevating device comprising the operation cord according to any one of claims 1 to 9.

By using such an elevating device, the operation cord can smoothly circulate and at the same time, the elevating device is provided with a fail-safe function.

According to the present invention, it is possible to provide an operation cord having a fail-safe function and an elevating device using the operation cord while enabling smooth circulation of the operation code.

It is a figure which shows the horizontal blind using the operation code which concerns on embodiment of this invention. It is an enlarged view of the operation part on the right side of the horizontal blind shown in FIG. FIG. 3 is a cross-sectional view of the pulley case shown in FIG. 2 taken along line AA. It is a front view which shows the operation code which concerns on embodiment of this invention. It is sectional drawing which shows the connection part which comprises the operation cord which concerns on embodiment of this invention. It is a disassembled perspective view which shows the connection part which comprises the operation cord which concerns on embodiment of this invention. It is a front view which expands and shows the 1st joint main body or the 2nd joint main body which comprises the connection part shown in FIG. 5 and FIG. It is a top view which expands and shows the 1st joint main body or the 2nd joint main body which comprises the connection part shown in FIG. 5 and FIG. It is a side view which expands and shows the 1st joint main body or the 2nd joint main body which comprises the connection part shown in FIG. 5 and FIG. FIG. 8 is a sectional view taken along line BB in FIG. It is a front view which expands and shows the joint ring which comprises the connection part shown in FIG. 5 and FIG. It is a rear view which expands and shows the joint ring which comprises the connection part shown in FIG. 5 and FIG. FIG. 12 is a sectional view taken along line CC in FIG. 11. FIG. 12 is a sectional view taken along line DD in FIG. It is the EE sectional view taken on the line in FIG. It is sectional drawing which shows the fitting state of the 1st or 2nd joint main body which comprises the connection part of the operation cord which concerns on embodiment of this invention, and a joint ring. It is a disassembled perspective view which shows the connection part of the operation cord which concerns on another embodiment of this invention. It is principal part sectional drawing of the connection part shown in FIG.

Hereinafter, preferred embodiments of an operation cord according to the present invention and a lifting device using the operation cord will be described in detail with reference to the drawings. However, the present invention is not limited to the preferred embodiments described below.

FIG. 1 is a view showing a horizontal blind using an operation cord 9 according to an embodiment of the present invention, where (A) shows a front view and (B) shows a plan view. FIG. 2 is an enlarged view of an operation portion on the right side of the horizontal blind shown in FIG. 3 is a cross-sectional view taken along line AA of the pulley case 8 shown in FIG.

In the horizontal blind shown in FIG. 1, a multi-stage slat 3 is supported by a ladder cord 2 suspended from a head box 1, and a bottom rail 4 is installed at the lower end of the ladder cord 2.

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

As shown in FIGS. 2 and 3, a pulley 16 disposed in a pulley case 8 is rotatably supported at one end of the head box 1. The operation cord 9 enters the recess 17 formed on the outer periphery of the pulley 16 so as not to contact the inner side 8 a of the pulley case 8, and is hung on the pulley 16. When the operation cord 9 is operated to rotate the pulley 16 in the forward / reverse direction, the winding shaft 7 is rotated via the gear in the gear box 10 and the lifting shaft 12a, and the lifting cord 5 is moved to the winding shaft 7. The slat 3 and the bottom rail 4 are moved up and down.

When the pulley 16 is rotated, the tilt drum 13 is rotated via the gear in the gear box 10, the tilt shaft 12 b and the like, and each slat 3 is rotated via the ladder cord 2. .

FIG. 4 is a front view showing the operation cord 9 according to the embodiment of the present invention. FIG. 5 is a cross-sectional view showing the connecting portion 20 constituting the operation cord 9 according to the embodiment of the present invention. FIG. 6 is an exploded perspective view showing the connecting portion 20 constituting the operation cord 9 according to the embodiment of the present invention.

As shown in FIG. 4, the operation cord 9 is formed in an endless shape by connecting both ends of the cord 14 with a connecting portion 20. The cord 14 has a cylindrical shape, and both ends thereof are tapered. For the cord 14, for example, a polyester resin can be suitably used. However, the cord 14 is not particularly limited as long as the material is a thermoplastic resin having a predetermined strength or more, and may be made of a resin other than the 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 9 is secured by the center core, and the durability in the extending direction can be secured.

As shown in FIGS. 5 and 6, the connecting portion 20 includes a first joint body 40 and a second joint body 41 having the same configuration as the first joint body 40, and a joint installed between the two. The structure is connected by a ring 42. The connecting portion 20 on which these three members are formed has a cylindrical 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 cord 14. However, the outer diameter M of the connecting portion 20 may be formed to be the same as the maximum diameter P of the cord 14. Since the connecting portion 20 is formed as described above, the outer diameter M in the lateral direction is the maximum diameter P of the cord 14 when the operation cord 9 is operated to rotate the pulley 16 shown in FIG. The connecting portion 20 of the operation cord 9 formed so as to be the same as or smaller than is almost free from contact with the inner side 8 a of the pulley case 8. In addition, the risk of the connecting portion 20 being caught in the concave portion 17 formed on the peripheral surface of the pulley 16 is reduced. As a result, the operation code 9 can be smoothly circulated. Further, the length of the connecting portion 20 in the vertical direction is formed to be 1.2 times to 2.5 times the maximum diameter P of the cord 14. For example, when the maximum diameter P of the cord 14 is 5.5 mm, the length of the connecting portion 20 may be 7 mm. For this reason, the pulley 16 can be rotated more smoothly without the connecting portion 20 hitting the inner side 8 a of the pulley case 8.

Further, flange portions 30 for fitting the first joint body 40 and the second joint body 41 to the tips of the tapered portions of the both ends of the cord 14 made of thermoplastic resin, respectively. Is provided. In this embodiment, as shown in FIG. 5, the flange portion 30 is formed in a ring shape so as to be larger in diameter than the smallest diameter portion on the tip side that is tapered and smaller in diameter than the maximum diameter P. . The flange portion 30 is for sufficiently securing the joining strength between the first joint body 40 and the second joint body 41. If the strength can be sufficiently secured, the shape of the flange portion 30 can be obtained. Is not particularly limited, and may be a gear shape or the like. Further, the outer diameter R1 of the flange portion 30 is formed to be between 1.05 and 1.3 times the minimum diameter R2 of the cord 14. The value of R1 / R2 is 1.1 to 1.2 because of the ease of forming the flange portion 30 and the strength of the outsert molding of the first joint body 40 and the second joint body 41. From the aspect, it is preferable.

Various methods can be adopted for attaching the first joint body 40 and the second joint body 41 to the tips of both ends of the cord 14. For example, first, heat is applied in a state where the tips of both ends of the cord 14 are compressed, and the ring-shaped flange portion 30 is formed at the tip of the cord 14 using a prepared mold. And the 1st joint main body 40 and the 2nd joint main body 41 are outsert-molded so that the said flange part 30 may be covered. When such outsert molding is performed, both ends of the cord 14 are fixed to the first joint body 40 and the second joint body 41 with high joint strength. However, the method of integrating the first joint body 40 and the second joint body 41 with the cord 14 is not limited to the method described above. For example, the first joint body 40 and the second joint body 41 are formed in advance, and the flange portions 30 formed at both ends of the cord 14 are fitted to the first joint body 40 and the second joint body 41. Also good.

Further, as shown in FIG. 5, the cord 14 has a diameter that gradually decreases as the distance between each flange portion 30 and the portion having the maximum diameter P of the cord 14 approaches each flange portion 30. A reduced diameter portion 35 is formed. Therefore, both end portions of the cord 14 are easily coupled to the first joint main body 40 and the second joint main body 41 constituting the connecting portion 20, and the outer diameter M in the lateral direction of the connecting portion 20 is corded. It becomes easy to make it the same as or smaller than the maximum diameter P of 14.

FIG. 7 is an enlarged front view showing the first joint body 40 or the second joint body 41 constituting the connecting portion 20 shown in FIGS. 5 and 6. FIG. 8 is an enlarged plan view showing the first joint body 40 or the second joint body 41 constituting the connecting portion 20 shown in FIGS. 5 and 6. FIG. 9 is an enlarged side view showing the first joint body 40 or the second joint body 41 constituting the connecting portion 20 shown in FIGS. 5 and 6. 10 is a cross-sectional view taken along line BB in FIG.

As shown in FIGS. 6 to 10, the first joint body 40 and the second joint body 41 are formed of the same synthetic resin and are formed at both ends of the cord 14. A round shaft-like fitting protrusion 45 is formed at the tip of the first joint body 40 and the second joint body 41.

On the outer peripheral surface of the front end portion of the fitting protrusion 45, two expanded diameter portions 46 having an outer diameter increased in line symmetry with respect to the center of the round shaft are formed. At the middle in the radial direction of the swelled portion 46, a locking recess 47 that is a recess having a semicircular cross section is formed. Further, chamfers 54 are formed on the distal end side and the proximal end side of the expanded diameter portion 46. Due to the

chamfers

54, 54, the expanded diameter portion 46 has a trapezoidal cross-sectional shape when cut along the central axis.

As shown in FIGS. 6 and 10, a rotation restricting portion 48 protruding in the radial direction of the round shaft is formed in line symmetry with respect to the center at the base end portion of the fitting protrusion 45, that is, on the flange portion 30 side. Has been. Each rotation restricting portion 48 is formed at a position 45 degrees away from the locking recess 47 in the circumferential direction with respect to the center of the round shaft.

FIG. 11 is an enlarged front view showing the joint ring 42 constituting the connecting portion 20 shown in FIGS. 5 and 6. FIG. 12 is an enlarged rear view showing the joint ring 42 constituting the connecting portion 20 shown in FIGS. 5 and 6. 13 is a cross-sectional view taken along line CC in FIG. 14 is a cross-sectional view taken along the line DD in FIG. 15 is a cross-sectional view taken along line EE in FIG. FIG. 16 is a cross-sectional view showing a fitting state between the first joint body 40 or the second joint body 41 and the joint ring 42.

The entire joint ring 42 is formed in a cylindrical shape. As shown in FIGS. 11 and 12, the

openings

49 a and 49 b on both sides of the joint ring 42 are formed in a substantially rectangular shape so that the distal end portion including the enlarged diameter portion 46 of the fitting protrusion 45 can be inserted. Yes. Further, the

openings

49a and 49b have a shape in which the substantially rectangular long direction is rotated 90 degrees with respect to the center of the cylinder.

In the inside of the joint ring 42, a circular hole (fitting hole) 50 having a diameter capable of rotating the tip end portion of the fitting protrusion 45 is formed. The circular hole 50 has the same center as the center of the outer diameter of the joint ring 42. Then, the locking

portions

51a and 51b constituting the first locking portions that prevent the expanded diameter portion 46 from coming out of the circular hole 50 are formed at the opening edges in the laterally short axis direction of the opening 49a shown in FIG. Each is formed. In addition, as shown in FIG. 12, at the opening edge in the vertically long short axis direction of the opening 49 b, a locking portion 51 c that constitutes a second locking portion that prevents the expanded diameter portion 46 from coming out of the

circular hole

50, 51d is formed. The

first locking portions

51a and 51b and the

second locking portions

51c and 51d are provided in a mirror-symmetrical manner in the

openings

49a and 49b of the circular hole 50 so as to be shifted from each other by 90 degrees. However, it is not limited to 90 degrees. For this reason, when a tensile force acts on each fitting protrusion 45 in a direction away from each other, the bulging portion 46 of each fitting protrusion 45 has the

first locking portions

51a, 51b and the second engagement portion. When operating to push and widen the

openings

49a and 49b of the joint ring 42 via the

stop portions

51c and 51d, the portions to be pushed are shifted from each other by 90 degrees, and it is easy to secure a holding force. .

As shown in FIG. 13 and FIG. 14, a chamfer 52 is provided at the boundary between the

first locking portions

51 a and 51 b, the

second locking portions

51 c and 51 d and the circular hole 50, and the fitting protrusion 45 is provided. When pulled out from the circular hole 50, that is, when a strong pulling force acts and a break occurs at the connecting portion 20, the chamfering 52 prevents the locking portions 51a to 51d from being damaged.

Further, a locking projection 53a protruding radially inward is formed inside the first locking portion 51a, and a locking projection 53b protruding radially inward is formed inside the second locking portion 51c. Has been. That is, locking

projections

53a and 53b that engage with the locking recess 47 are formed on the inner peripheral surface of the circular hole 50, respectively. In order to connect the first joint body 40 and the joint ring 42, the fitting protrusion 45 of the first joint body 40 is inserted into the opening 49 b of the joint ring 42, and the first joint body 40 is connected to the joint ring. Rotate 90 degrees counterclockwise with respect to 42 as viewed from 49a. Then, the locking recess 47 of the fitting protrusion 45 engages with the locking protrusion 53a in the circular hole 50, and one rotation restricting portion 48 is moved from one second locking portion 51c to the second engagement. It moves to the stop 51d side, hits the second locking part 51d, and the other rotation restricting part 48 shifts from the other second locking part 51d side to the one second locking part 51c side. Then, it abuts against the second locking portion 51c and is positioned as shown in FIG.

Also, the second joint body 41 is similarly inserted into the other opening 49a of the joint ring 42, and the relative position is rotated by 90 degrees. Then, as shown in FIG. 5, the first joint body 40 and the second joint body 41 are connected via the joint ring 42.

In this state, the enlarged diameter portions 46 of the fitting protrusions 45 of the first joint body 40 and the second joint body 41 are engaged with the locking portions 51a to 51d of the joint ring 42, so that the joint ring 42 Is held in the circular hole 50.

The holding force is set so that the fitting protrusion 45 does not come off the joint ring 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. Only when a large tensile force exceeding the normal tensile force is applied to the operation cord 9, due to the elasticity of the synthetic resin of the joint ring 42, the opening 49a of the joint ring 42 is caused by the expanded diameter portion 46 of the fitting protrusion 45. 49b are pushed out in the radial direction so that the fitting protrusion 45 is detached from the joint ring 42. In this case, either the first joint body 40 or the second joint body 41 is first removed from the joint ring 42. Therefore, the joint ring 42 is engaged with either the first joint body 40 or the second joint body 41, and the joint ring 42 does not come off the operation cord 9.

The operation code 9 configured in this way becomes an operation code 9 having a fail-safe function as well as being able to smoothly circulate around the pulley 16 without limitation. After the coupling portion 20 is disengaged, the first joint body 40 or the second joint body 41 can be easily regenerated as the endless operation cord 9 by re-fitting the joint ring 42 to the joint ring 42. . Further, since the fitting protrusion 45 is inserted into the

openings

49a and 49b of the joint ring 42 and rotated 90 degrees, the fitting protrusion 45 is fitted to the joint ring 42. The operating force for fitting the portion 45 to the joint ring 42 can be negligible.

Further, since each of the locking portions 51a to 51d supports a force that is pulled in the axial direction of the expanded diameter portion 46, a sufficient holding force for holding the fitting protrusion 45 on the joint ring 42 can be ensured. . Further, when the locking

protrusions

53a and 53b are fitted in the locking recess 47, the positioning is performed by the action of the rotation restricting portion 48, so that the position can be maintained sufficiently.

The lifting device using the operation cord 9 according to the embodiment of the present invention is suitably used for, for example, a solar shading device such as a roll screen, another type of blind, or a curtain in addition to the horizontal blind shown in FIG. be able to. By providing the operation code 9, the lifting device of the present invention is easy to handle and can avoid potential risks due to the operation code.

As described above, the operation cord 9 according to the embodiment of the present invention and the horizontal blind which is a preferred embodiment of the lifting device using the operation cord have been described. However, the present invention is not limited to the above-described embodiment. However, the present invention can be implemented in various modifications.

FIG. 17 is an exploded perspective view showing an operation cord connecting portion 60 according to another embodiment of the present invention. 18 is a cross-sectional view of a main part of the connecting portion 60 shown in FIG. As shown in FIGS. 17 and 18, the connecting portion 60 includes an integrated portion 61 having a configuration in which the first joint body 40 and the joint ring 42 described above are integrated, and a second joint body 41. You may make it comprise from one member. A second joint body 41 and an integrated portion 61 are installed at both ends of the cord 14 via the respective flange portions 30.

Further, instead of the chamfer 52 in the joint ring 42, a step having a right-angle cross section may be used. In addition, although there are two each of the expanded diameter portion 46, the locking recess 47, the

first locking portions

51a, 51b, the

second locking portions

51c, 51d, etc., one each, or three or more Or you can do it. In this case, the rotation angle is preferably other than 90 degrees.

Further, the cord 14 may be a resin other than a thermoplastic resin, or may be a knitted yarn. Moreover, although the both ends of the cord 14 are made into the reduced diameter part 35 which becomes thin gradually, it is good also as the small diameter part 35 which has a fixed diameter from a predetermined site | part to a front-end | tip. Further, outsert molding may be performed without providing the flange portion 30.

Further, for example, the arrangement or number of the connecting

portions

20 and 60 can be appropriately selected according to the required designability and failsafe functionality of the operation code 9. Further, the connection between the cord 14 and the first joint body 40 or the integrated portion 61 and the connection between the cord 14 and the second joint body 41 are not outsert molding, but other connection methods such as bonding with an adhesive. It may be adopted.

Further, in each of the above-described embodiments, the outer diameters of the first joint body 40, the second joint body 41, and the joint ring 42 are all the same as the outer diameters of the connecting portions 20 in the lateral direction. However, only one or two of these three members or two members may be enlarged, the outer diameter thereof may be the outer diameter M of the connecting portion 20, and the other one or two may be of a smaller outer diameter. . Moreover, although these 3 members or 2 members shall be shape | molded with the synthetic resin, you may form with other members, such as a metal member.

DESCRIPTION OF SYMBOLS 1 ... Horizontal type blind (elevating device), 9 ... Operation cord, 14 ... Cord, 20 ... Connection part, 30 ... Flange part, 40 ... 1st joint main body, 41 ... 2nd joint main body, 42 ... Joint ring, 45 ... fitting protrusion, 46 ... swelled diameter part, 47 ... locking recess (positioning means), 48 ... rotation restricting part, 50 ... circular hole (fitting hole), 51a, 51b ... first locking part, 51c, 51d, second locking portions, 53a, 53b, locking protrusions (positioning means).

Claims

An operation cord that can be made endless by connecting both ends of the cord with a connecting portion,
The operation cord, wherein the connecting portion is formed so that an outer diameter thereof in a lateral direction is equal to or smaller than a maximum diameter of the cord.
The operation code according to claim 1,
The operation cord is characterized in that both ends of the cord are formed so that the diameter thereof becomes narrower as the connection portion is approached.
The operation code according to claim 1,
The length of the connecting portion in the vertical direction is 1.2 to 2.5 times the maximum diameter of the cord.
The operation code according to any one of claims 1 to 3,
The connecting portion is
A first joint body provided at one end of the cord;
A second joint body provided at the other end of the cord;
A joint ring installed between the first joint body and the second joint body,
The first joint body and the second joint body each have a shaft-like fitting projection, and the joint ring is fitted so that each fitting projection can be fitted. It has a hole, and the fitting projection can be engaged with the fitting hole by inserting it into the fitting hole and turning it.
The first joint body, the second joint body, and the joint ring are formed so that the outer diameters in the lateral direction are the same as or smaller than the maximum diameter of the cord. Operation code.
The operation code according to claim 4,
The operation code is characterized in that 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.
The operation code according to claim 4,
The operation cord, wherein the first joint body and the second joint body are outsert-molded at one end and the other end of the cord, respectively.
The operation code according to claim 4,
The cord is made of a thermoplastic resin, and flanges for fitting the first joint body and the second joint body are provided at the ends of both ends of the cord, respectively. Feature operation code.
The operation code according to claim 4,
Forming the first joint body, the second joint body and the joint ring with synthetic resin, and providing the fitting protrusion with an enlarged diameter portion having a diameter larger than a base end portion of the fitting protrusion; An operation cord, wherein the fitting hole is provided with a first locking portion and a second locking portion that engage with the respective enlarged diameter portions.
The operation code according to claim 8,
The operation cord, wherein the first locking portion and the second locking portion are provided in a mirror-symmetrical manner by being shifted by 90 degrees from each other in both opening portions of the fitting hole.
The operation code according to claim 8,
An operation cord comprising positioning means for positioning a rotation position of the fitting protrusion on the inner peripheral surface of the bulge portion and the fitting hole.
An elevating device comprising the operation cord according to any one of claims 1 to 10.