JP5431239B2 - Ladder cord manufacturing apparatus and ladder cord manufacturing method for horizontal blind - Google Patents

Description

  The present invention relates to a manufacturing apparatus for manufacturing a ladder cord for a horizontal blind in which the pitch of the weft is different between the front and back warps.

  The horizontal blind is supported by a ladder cord suspended from the head box, and a plurality of slats are supported. By rotating each slat in the same phase via the tilt device and the ladder cord in the head box, The amount of light extraction can be adjusted.

  In such a horizontal blind, if the slat is horizontal and the amount of light collected in the room is sufficiently secured, it is too bright due to direct light near the window, or indoor privacy cannot be secured.

On the other hand, if the slats are closed to alleviate the glare at the window and ensure privacy, sufficient light intensity cannot be ensured except at the window.
Therefore, from the top to the bottom of the ladder cord, the angle of the slats was gradually closed to alleviate the glare at the window, ensure privacy, and secure sufficient light intensity to the back of the room. Horizontal blinds have been proposed.

  Patent Document 1 discloses a ladder cord manufacturing apparatus that supports a slat so that it gradually closes from an upper stage to a lower stage.

Japanese Patent No. 3558939

  The manufacturing apparatus disclosed in Patent Document 1 can make the pitch of the weft yarn in one warp yarn of the ladder cord longer than the pitch of the weft yarn in the other warp yarn. However, since the pitch difference is set by the difference in the diameters of the processing rollers, it is difficult to accurately form the weft yarn pitch in each warp yarn to a desired numerical value.

  An object of the present invention is to provide a ladder cord manufacturing apparatus capable of accurately forming the pitch of the weft yarn in each warp yarn of the ladder cord into a different pitch.

  In Claim 1, it equips with a storage groove | channel which shape | molds a ladder cord in a metal mold | die, The said storage groove | channel includes the 1st and 2nd warp thread groove which accommodates the warp yarn of the said ladder cord, and the said 1st and 2nd warp thread groove And a pitch for forming a weft thread groove for accommodating the weft thread of the ladder cord, a pitch of the weft thread groove with respect to the first warp thread groove, and a pitch of the weft thread groove with respect to the second warp thread groove to different pitches. Forming means.

According to a second aspect of the present invention, the pitch forming means includes the second warp groove that is bent in a zigzag shape and the first warp groove that is linear.
According to a third aspect of the present invention, the pitch forming means includes a plurality of regions in the mold in which the pitch of the weft yarn groove is different from that of the second warp yarn groove.

According to a fourth aspect of the present invention, there is provided a heating device that heats the mold that houses the ladder cord in the housing groove.
In claim 5, the warp yarn of the ladder cord is accommodated in the first and second warp grooves of the mold, the weft yarn of the ladder cord is accommodated in the weft yarn groove of the mold, the mold is heated, A pitch forming means provided in the first and second warp grooves forms the weft groove pitch with respect to the first warp groove and the weft groove pitch with respect to the second warp groove at different pitches.

  ADVANTAGE OF THE INVENTION According to this invention, the ladder cord manufacturing apparatus which can form correctly the pitch of the weft in each warp yarn of a ladder cord in a different pitch can be provided.

It is a top view which shows the metal mold body of one Embodiment. It is sectional drawing which shows the metal mold body of one Embodiment. It is a disassembled perspective view which shows the metal mold | die of one Embodiment. It is a front view which shows the ladder code | cord | chord before shaping | molding. It is a front view which shows the ladder code | cord | chord after shaping | molding.

  Hereinafter, an embodiment embodying the present invention will be described with reference to the drawings. The ladder cord is a first step of braiding polyester fiber yarn in a ladder shape, a second step of dyeing the braided ladder cord into a desired color, and the dyed ladder cord is contracted by heat. In particular, it is formed through a third step of forming the weft pitch to a predetermined dimension.

FIG.1 and FIG.2 shows the metal mold | die body 1 which deform | transforms the pitch of the weft of a ladder cord into a different pitch with each warp in a 3rd process.
A housing groove 2 for housing and forming a ladder code is formed on the upper surface of the long plate-shaped mold body 1. The accommodation groove 2 is composed of first and second warp grooves 3a and 3b for accommodating ladder warp yarns, and a weft yarn groove 4 for accommodating weft yarns.

  The first warp groove 3a is a linear groove for receiving one warp of the ladder cord, and the second warp groove 3b is a zigzag groove for receiving the other warp of the ladder cord. is there.

  The weft thread groove 4 is a linear groove that connects the first warp thread groove 3a and the second warp thread groove 3b, and the pitch pa is set to 21.1 mm. It is a groove shallower than the warp grooves 3a, 3b. Further, a widened portion 5 is formed in the middle portion of the weft thread groove 4 so that the weft thread can be easily gripped.

  The second warp groove 3b is formed in a zigzag shape so that the distance from the first warp groove 3a is the narrowest at the position where the weft thread groove 4 is connected. Further, the distances d1, d2, and d3 between the connecting ends of the respective weft grooves 4 and the second warp grooves 3b and the tops of the second warp grooves 3b that form a mountain shape between the respective weft threads 4 are determined according to the mold body 1. There are three types from one end to the other.

  More specifically, the distance d1 is set to 1.0 mm in the first area A1, the distance d2 is set to 1.4 mm in the second area A2, and the distance d3 is set in the third area A3. Is set to 2.0 mm. And in each area | region A1-A3, the ladder code | cord | chord provided with 10 steps of wefts is shape | molded, respectively.

  With such a configuration, in the first region A1, the pitch pa of the weft thread groove 4 in the first warp groove 3a is 21.1 mm, whereas the pitch of the weft thread groove 4 in the second warp groove 3b is It is set to 21.2 mm.

In the second region A2, the pitch pa of the weft yarn groove 4 in the first warp groove 3a is 21.1 mm, whereas the pitch of the weft yarn groove 4 in the second warp groove 3b is 21.3 mm. Is set.
Similarly, in the third region A3, the pitch pa of the weft yarn groove 4 in the first warp groove 3a is 21.1 mm, whereas the pitch of the weft yarn groove 4 in the second warp groove 3b is 21.5 mm. Set to

A plurality of screw holes 6 are provided at equal intervals on both sides of the receiving groove 2 in the mold body 1, and the pressing mold 7 shown in FIG. 3 can be fixed to the upper surface of the mold body 1 with mounting screws 8. ing.
In the third step, as shown in FIG. 3, the pressing die 7 is attached to the die body 1 in a state where the ladder cord 9 formed in the second step is accommodated in the accommodating groove 2. In this state, the mold body 1 is heated for a predetermined time in the heating furnace of the heat setting device. The heating temperature is around 200 ° C., and the heating time is controlled by the controller of the heat setting device.

  In this step, the warp yarns 10a and 10b of the ladder cord 9 are contracted along the first and second warp grooves 3a and 3b in the mold body 1 by heat treatment for a predetermined time. Then, after the heat treatment, the ladder cord 9 is taken out from the mold body 1 and cooled.

  The ladder cord formed in the third step as described above will be described. The ladder cord 9 shown in FIG. 4 is a ladder cord generated in the second step, and the pitch px of the weft yarn 11 in the warp yarns 10a and 10b. Are both 21.4 mm.

  FIG. 5 shows a ladder cord 12 obtained by molding the ladder cord 9 in the third step using the mold body 1. As shown in the figure, the pitch py1 of the weft yarn 11 in the warp yarn 10a formed in the first region A1 is formed to 21.1 mm. Further, the pitch py2 of the weft 11 in the warp 10b formed in the first region A1 is formed to 21.2 mm which is the pitch of the weft 4 in the second warp groove 3b.

  Further, the pitch py1 of the weft yarn 11 in the warp yarn 10a formed in the second region A2 is formed to 21.1 mm, and the pitch py2 of the weft yarn 11 in the warp yarn 10b formed in the second region A2 is 21.mm. Molded to 3 mm.

  Similarly, the pitch py1 of the weft 11 in the warp 10a formed in the third region A3 is formed to 21.1 mm, and the pitch py2 of the weft 11 in the warp 10b formed in the third region A3 is 21. Molded to 5 mm.

  Thus, in the horizontal blind using the ladder cord 12 formed in each region A1 to A3 independently, the pitch of the weft 11 in the warp 10b is larger than the pitch of the weft 11 in the warp 10a. Then, since the pitch difference is accumulated, the lower the slat, the larger the inclination.

Therefore, it is possible to alleviate glare at the window and secure privacy while securing the amount of light collected by the upper slats.
With the ladder cord manufacturing apparatus configured as described above, the following operational effects can be obtained.
(1) Ladder cords 12 having different weft 11 pitches in the respective warp yarns 10a and 10b can be easily formed.
(2) The pitch difference between the weft yarns 11 in the warp yarns 10 a and 10 b can be accurately formed into a desired pitch difference by the first and second warp yarn grooves 3 a and 3 b and the weft yarn groove 4 of the mold body 1.
(3) The first to third regions A1 to A3 of the mold body 1 can simultaneously form a plurality of types of ladder cords having different weft 11 pitch differences between the warp yarns 10a and 10b.
(4) The upper slat is supported by a ladder cord without a weft pitch difference, the middle slat is supported by a ladder cord having a small weft pitch difference, and the lower slat is a ladder cord having a large weft pitch difference. If supported by, horizontal blinds with many slat steps can be supported. That is, it is easy to reduce the glare near the window and secure privacy while securing the amount of light collected by the upper slats.

You may implement the said embodiment in the following aspects.
In the first region A, the second warp groove 3b may be linear, and ladder cords having no pitch difference may be formed on the warps 10a and 10b. Then, the upper slat is supported by a ladder cord having no weft pitch difference, the middle slat is supported by a ladder cord in the second region A2 having a small weft pitch difference, and the lower slat is supported by a weft pitch. When supported by the ladder cord of the third region A3 having a large difference, it is possible to deal with a horizontal blind having a large number of slat stages. That is, it is easy to reduce the glare near the window and secure privacy while securing the amount of light collected by the upper slats.
The second warp groove 3b may be bent along a curve.
-You may form the accommodation groove | channel 2 provided with the 1st and 2nd warp yarn grooves 3a and 3b and the weft yarn groove | channel 4 in the outer peripheral surface of a roller-shaped metal mold | die.
-You may heat a metal mold | die directly with a heating apparatus, without putting a metal mold | die into a heating furnace.

  DESCRIPTION OF SYMBOLS 1 ... Mold (die main body), 2 ... Accommodating groove, 3a ... Pitch forming means (first warp groove), 3b ... Pitch forming means (second warp groove), 4 ... Weft thread groove, 7 ... Mold (Holding die), 9, 12 ... ladder cord, 10a, 10b ... warp, 11 ... weft.

Claims (5)

It has an accommodation groove to mold the ladder cord in the mold
The receiving groove is
First and second warp grooves for receiving the warp of the ladder cord;
A weft thread groove communicating with the first and second warp thread grooves and accommodating a weft thread of the ladder cord;
Ladder cord manufacturing of a horizontal blind comprising pitch forming means for forming the pitch of the weft thread groove with respect to the first warp thread groove and the pitch of the weft thread groove with respect to the second warp thread groove into different pitches apparatus. The pitch forming means includes
2. The horizontal blind ladder cord manufacturing apparatus according to claim 1, comprising the second warp groove bent in a zigzag shape and the linear first warp groove. 3. The pitch forming means includes
3. The horizontal blind ladder cord manufacturing apparatus according to claim 2, wherein the mold is provided with a plurality of regions in the second warp groove having different weft thread pitches.   The horizontal blind ladder cord manufacturing apparatus according to any one of claims 1 to 3, further comprising a heating device that heats a mold in which the ladder cord is housed in the housing groove.   Ladder cord warps are accommodated in first and second warp grooves of the mold, the weft threads of the ladder cord are accommodated in the weft grooves of the mold, the mold is heated, and the first and second A horizontal blind characterized in that the pitch of the weft thread groove with respect to the first warp thread groove and the pitch of the weft thread groove with respect to the second warp groove are formed at different pitches by pitch forming means provided in the warp thread groove of Ladder code manufacturing method.

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