JP5991854B2 - Ladder cord manufacturing method and manufacturing apparatus for horizontal blind - Google Patents

Description

  The present invention relates to a horizontal blind ladder code manufacturing method and manufacturing apparatus capable of appropriately adjusting the interval between upper and lower adjacent middle cords in each vertical cord with respect to a ladder cord composed of a pair of vertical cords and middle cords. .

  2. Description of the Related Art Conventionally, in manufacturing a horizontal blind ladder cord, it is generally performed to heat-mold the ladder cord using a thermal processing apparatus. In this thermal processing apparatus, heating is performed while applying equal tension to a pair of ladder cords that are ladder-shaped, and by pulling it out from the thermal processing apparatus, the middle stage cord has a left-right equal pitch. I am trying to manufacture the ladder code.

  Further, as a manufacturing method for making the middle cords have different pitches on the left and right instead of the left and right equal pitches, a manufacturing method described in Patent Document 1 is known.

  In the ladder cord manufacturing method disclosed in Patent Document 1, a first heating furnace that heats the ladder cord at a temperature of around 100 ° C., and a processing tooth mold that rotates in the first heating furnace and guides the ladder cord. A first heat setting device provided on the processing tooth mold and having an outer circumferential surface of the same circumference for guiding each warp thread (vertical cord) of the ladder cord, and a temperature 200 higher than that of the first heating furnace. A second heating furnace that heats at a temperature of around 0 ° C., a processing groove mold that rotates in the second heating furnace and guides the ladder cord, and a ladder provided circumferentially on the outer peripheral surface of the processing groove mold Manufacture is carried out using a second heat setting device provided with grooves for forming the weft (medium stage cord) pitch of each warp of the cord into different pitches.

  In this method, first, a ladder cord is introduced into a first heating furnace, heated while being guided by a processing tooth profile in the first heating furnace, and formed so that the pitch interval of the weft yarns contracts to a predetermined dimension. . At this stage, since the outer peripheral surface of the working tooth profile has the same diameter, the pitch of the weft yarn in each warp yarn is formed to the same pitch.

  Next, the ladder cord formed at the same pitch by the first heat setting device is introduced into the second heating furnace, and one warp of the ladder cord is hung on the outer peripheral surface in the second heating furnace, While the warp yarns are hooked in the grooves, the weft pitches in the warp yarns are formed in different pitches while being moved along with the rotation of the processing groove mold, and ladder codes having different pitch differences in the weft yarn pitches are formed.

JP 2012-21334 A

  However, in the conventional manufacturing method, by applying equal tension to a pair of vertical cords, a theoretically symmetrical ladder cord should be able to be obtained, but in reality, a subtle difference in tension, Due to various factors such as the degree of knitting and temperature unevenness in the heating furnace, a difference in the left and right pitch of the middle cord may occur.

  In addition, when the left and right pitch difference is intentionally made as in Patent Document 1, the first heat setting device that heat-molds the pitch of the middle-stage cord to the same pitch in each vertical cord of the ladder cord, and the first heat Since each of the vertical cords of the ladder cords heat-formed by the set device requires two heat-setting devices called a second heat-setting device that heat-forms the middle-stage cord to a different pitch, it becomes a large-scale manufacturing device. As a result, a problem arises in that the space for installing the device also increases.

  Moreover, in order to process into a stable shape as a ladder cord, it is necessary to heat-mold at a temperature of about 200 ° C., but the furnace temperature of about 200 ° C. is the second of the second heat setting device. In the second heat setting device, the middle cords can only be formed at different pitches in each vertical cord, and can not be formed at the same pitch. It is not possible to manufacture both ladder cords having the same weft pitch and different ladder cords.

  The present invention has been made in view of such a problem, and a horizontal blind ladder cord manufacturing method and manufacturing capable of appropriately adjusting the pitch of the middle cord in a pair of vertical cords in the same process using one thermal processing apparatus. The object is to provide a device.

In order to achieve the above-described object, the present invention provides a method for manufacturing a ladder blind of a horizontal blind having a ladder-like shape including a pair of vertical cords and a plurality of middle cords connecting the pair of vertical cords.
Sending the ladder cord to the thermal processing apparatus while maintaining the tension state;
A step of thermoforming the ladder cord with a thermal processing device so that the interval between the upper and lower adjacent middle cords in the pair of vertical cords is the same;
Extracting the thermoformed ladder cord from the thermal processing apparatus;
Pressing at least one vertical cord of the pair of vertical cords of the ladder cord drawn out from the thermal processing apparatus,
By adjusting the tension applied to the vertical cord by the pressing, the ladder cord in which the interval between the upper and lower adjacent middle cords in each vertical cord is different from the interval between the upper and lower adjacent middle cords in each vertical cord becomes the same. Any one of the ladder codes can be manufactured.

Further , the tension applied to the vertical cord is determined by a distance by which a pressing surface that presses the vertical cord in a direction orthogonal to the vertical cord pushes out the vertical cord.

Further, the present invention is a horizontal blind ladder cord manufacturing apparatus having a ladder-like shape comprising a pair of vertical cords and a plurality of middle cords connecting the pair of vertical cords.
A thermal processing apparatus that heats the ladder cord in a state where the ladder cord is fed and the interval between the upper and lower adjacent middle cords in each vertical cord is equal;
A pressing device capable of pressing the vertical code of the ladder code immediately after being thermoformed by the heat processing device;
The pressing device can apply different tensions to the pair of vertical cords.

In addition , the pressing device includes a pressing member having a pressing surface that can linearly move from a direction orthogonal to each vertical cord so as to be able to press the vertical cord.

In addition , a ladder cord is wound downstream of the pressing device, and a roller for cooling the ladder cord is provided.

  According to the present invention, by pressing at least one of the pair of vertical cords of the heat-formed ladder cord, tension is applied to the heated vertical cord to extend the vertical cord, and each vertical cord It is possible to appropriately adjust the interval between the upper and lower adjacent middle cords. Accordingly, a ladder code in which the interval between the upper and lower middle cords in each vertical cord is different and a ladder code in which the interval between the upper and lower middle cords in each vertical cord is the same are selected and manufactured as appropriate. be able to.

  Since various types of ladder cords can be manufactured by the same process or by the same manufacturing apparatus, the entire apparatus can be made small, and the installation space can be reduced.

  By changing the distance that the pressing surface pushes out the vertical cord, the interval between the upper and lower adjacent middle cords in each vertical cord can be variously adjusted.

It is a schematic diagram of the manufacturing apparatus which shows the state which is manufacturing the ladder code with the manufacturing method which concerns on this invention. The state from the exit vicinity of a heat processing apparatus to a drawing roller is represented, (a) is front sectional drawing, (b) is side sectional drawing. (A) is a top view showing a press apparatus, (b) is a top view of the ladder code press state. It is a sectional side view showing the state from the vicinity of the exit of the heat processing apparatus to the drawing roller, (a) is a ladder code in which the interval between the upper and lower middle cords in the pair of vertical cords are the same (B) shows a state when a ladder cord is manufactured in which the interval between the middle cords adjacent to each other in the vertical direction in the pair of vertical cords is different. (A-1) is a side view of a blind using a ladder code in which the interval between the upper and lower adjacent middle cords in the pair of vertical cords is the same, and (a-2) is a part of the ladder code of (a-1). (B-1) is a side view of a blind using a ladder code in which a space between adjacent upper and lower middle cords in a pair of vertical cords is different, and (b-2) is a ladder of (b-1). It is a side view which shows a part of code | cord | chord. It is an image figure which shows the state at the time of attaching the horizontal blind using the ladder code manufactured with the manufacturing method which concerns on this invention to the window.

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

  A horizontal blind using a ladder cord 10 manufactured by the manufacturing method according to the present invention is shown in FIG. The ladder cord 10 has a ladder shape including a pair of vertical cords 10a and 10b and a plurality of middle cords 10c connecting the pair of vertical cords 10a and 10b, and the pair of vertical cords 10a and 10b. Is connected to a rotating drum (not shown) disposed in the head box 12 so as to be wound and unwound. The lower ends of the pair of vertical cords 10a and 10b are connected to the bottom rail 14, and the slats 16 are placed on the plurality of middle cords 10c. As shown in FIGS. 5 (a-1) and 5 (a-2), the ladder cord 10 has the same interval between the upper and lower middle cords 10c in both the pair of vertical cords 10a and 10b. As shown in (b-1) and (b-2), the interval between the upper and lower adjacent middle cords 10c is configured to be different for each vertical cord 10a, 10b. Further, the upper and lower ends of the lifting / lowering cord 18 are connected to a lifting / lowering drum coaxial with the rotary drum so that the winding / unwinding cord 18 can be wound and unwound. ing. When the elevating cord 18 is wound around the elevating drum, the slat 16 row rises, and when it is unwound, the slat 16 row descends.

  The manufacturing apparatus 20 for manufacturing the ladder cord 10 by the manufacturing method according to the present invention is an apparatus for performing processing such as heat forming of the ladder cord, and the ladder code before heating is wound as shown in FIGS. A tension roller 21 for applying tension to the ladder cord drawn from the reel 19, a carry-in rollers 22 and 22 for transporting the ladder cord 10 before heating, a thermal processing device 24 for thermoforming the ladder cord 10, and a heat A drawing roller 26 that draws the ladder cord 10 upward from the processing device 24, and a pressing device 28 that is between the heat processing device 24 and the drawing roller 26 and presses the ladder cord 10 led out of the heat processing device 24. A transport roller 32 that transports the ladder cord 10 pulled out by the pull-out roller 26 to the storage unit 30.

  The carry-in roller 22 has, on its outer peripheral surface, a feed dog 22a that engages with the middle cord 10c of the ladder cord 10 at the center and a guide portion 22b that guides the pair of vertical cords 10a and 10b on both sides of the feed dog 22a. And. A large number of feed dogs 22a are formed at equal intervals, and the outer diameter dimensions of the guide portions 22b on both sides of the feed dog 22a are the same.

  The thermal processing apparatus 24 includes a heating furnace 33 provided with a heater 35, a processing roller 34 rotatably supported in the heating furnace 33, and a controller. The inside of the heating furnace 33 can be controlled to a constant temperature. The processing roller 34 draws the ladder cord 10 into the heating furnace 33, circulates the ladder cord 10, and sends the ladder cord 10 out of the heating furnace 33. A feed dog 34a that engages with the middle cord 10c, and guide portions 34b that are on both sides of the feed dog 34a and guide the pair of vertical cords 10a and 10b. A large number of feed dogs 34a are formed at equal intervals, and the outer diameter dimensions of the guide portions 34b on both sides are the same.

  The drawing roller 26 is disposed above the outlet opening 24a of the thermal processing apparatus 24. The drawing roller 26 has a feed dog 26a that engages with the middle cord 10c of the ladder cord 10 at the center on the outer peripheral surface thereof. The guide teeth 26b are provided on both sides of the feed dog 26a and guide the pair of vertical cords 10a and 10b, respectively. A large number of feed dogs 26a are formed at equal intervals, and the outer diameters of the guide portions 26b on both sides are the same. The drawing roller 26 also has a function of rapidly cooling the ladder cord 10 heated by the thermal processing device 24 when the ladder cord 10 is wound around the drawing roller 26.

  As shown in FIGS. 2 and 3, the pressing device 28 is attached in the vicinity of the outlet opening 24 a outside the upper portion of the thermal processing device 24. The pressing device 28 includes a pair of pressing rods 38 and 40 disposed in correspondence with positions through which the pair of vertical cords 10a and 10b guided from the outlet opening 24a of the thermal processing device 24 to the drawing roller 26 passes, and thermal processing. The base 24 is fixed to the outer surface of the heating furnace 33 of the apparatus 24 and the pressing rods 38 and 40 are inserted therethrough, and the pressing rods 38 and 40 are movable with respect to the base 42 and in a non-movable state. Switchable screws 44, 46. The pressing rods 38 and 40 can be linearly moved separately from each other, and the pressing surfaces 38a and 40a having a concave shape are formed at the tips. The pressing bars 38 and 40 advance toward the vertical cords 10a and 10b in the direction orthogonal to the vertical cords, respectively, so that the pressing surfaces 38a and 40a can press the pair of vertical cords 10a and 10b, respectively, and move backward. Thus, the pressing surfaces 38a and 40a can be separated from the pair of vertical cords 10a and 10b. Further, a guide portion 48 is provided on the side facing the pressing surfaces 38a, 40a across the ladder cord, and the vertical cords 10a, 10b pressed by the pressing surfaces 38a, 40a move more than a predetermined amount in the pressing direction. It is regulated. The force with which the pressing surfaces 38a, 40a press the pair of vertical cords 10a, 10b is determined by the position where the pressing rods 38, 40 move forward, that is, the distance by which the vertical cord is pushed out. As the pressing rods 38 and 40 are further advanced and the distance for pushing out the pair of vertical cords 10a and 10b is increased, the pressing force is increased and the vertical cords 10a and 10b are greatly extended. When the pressing surfaces 38a and 40a press the vertical cords 10a and 10b, the vertical cords 10a and 10b are located in the recessed portions of the pressing surfaces 38a and 40a and do not easily fall off from the pressing surfaces 38a and 40a. ing. The vertical cord pressed by the pressing surfaces 38a and 40a is guided in a meandering manner by the guide portion 48, and tension is applied to the ladder cord.

  Next, a procedure for manufacturing the ladder cord 10 using the above manufacturing apparatus 20 will be described.

  First, the ladder cord 10 is knitted with a knitting machine made of synthetic fibers such as polyethylene fiber and polyester fiber, and wound around a reel 19. When knitting, the pair of vertical cords 10a and 10b are knitted in a ladder shape so that the intervals between the upper and lower middle cords 10c are the same. Optionally, the number of twisted yarns or the number of filaments constituting the twisted yarn may be different between the vertical cords 10a and 10b. For example, when the pitch of the middle cord 10c in the pair of vertical cords 10a and 10b is made different, the number of twisted yarns constituting the vertical cord with the larger pitch or the number of filaments constituting the twisted yarn is made smaller than the other. Thus, elongation by a pressing device described later can be effectively performed.

  In this way, after preparing the ladder cord 10 in advance, the reel 19 around which the ladder cord 10 is wound is set in the manufacturing apparatus 20, the ladder cord 10 is pulled out from the reel 19, and tension is applied by the tension roller 21, It is supplied into the heating furnace 33 of the thermal processing apparatus 24 via the carry-in rollers 22 and 22.

  In the heating furnace 33 of the thermal processing apparatus 24, the middle cord 10c of the ladder cord 10 is engaged with the feed dog 34a of the processing roller 34, and the pair of vertical cords 10a and 10b are respectively guided to the guide portions 34b on both sides. In this way, it is wound around the outer periphery of the processing roller 34 and is circulated. The ladder cord 10 is fed from the carry-in roller 22 into the heating furnace 33 of the thermal processing apparatus 24 while maintaining the tension state by the rotation of the processing roller 34, and is guided to the processing roller 34 in the heating furnace 33 at 200 ° C. It is heat-molded at the front and rear temperatures, and is led out from the outlet opening 24a of the thermal processing apparatus 24. In the thermoforming in the thermal processing apparatus 24, the pitch of the middle cord 10c is intended to be basically the same except for errors in each of the vertical cords 10a and 10b.

  The ladder cord 10 led out from the outlet opening 24a of the thermal processing apparatus 24 is wound around the drawing roller 26, and is pulled out while maintaining a tension state by the rotation of the drawing roller 26. However, the ladder cord 10 is drawn from the outlet opening 24a. Immediately after being derived, it is pressed by the pressing device 28 as necessary.

  For example, when manufacturing the ladder cord 10 having the same interval between the upper and lower middle cords 10c in the pair of vertical cords 10a and 10b as shown in FIGS. 5A-1 and 5A-2, thermal processing is performed. Since the device 24 is heat-formed at the same pitch, the pressing by the pressing device 28 is basically unnecessary as shown in FIG.

  However, since an error may occur due to various factors and a pitch difference may occur, in that case, as shown in FIG. 3 and FIG. The corresponding pressing bar is advanced and the other pressing bar is retracted and fixed with screws 44 and 46, respectively. As a result, the vertical cord with the smaller pitch is pressed by the pressing surface of the pressing bar in the horizontal direction before being cooled, and is stretched by applying tension. Thus, the pitch of the middle cord 10c in one vertical cord 10a is made equal to the pitch of the middle cord 10c in the other vertical cord 10b. By finely adjusting the position of the pressing surface of the pressing bar, the left-right difference in pitch can be as close to 0 as possible. Alternatively, it is possible to extend both vertical cords 10a and 10b as close to the set pitch as possible.

  On the other hand, for example, when a ladder cord 10 is manufactured in which a pair of vertical cords 10a and 10b as shown in FIGS. As shown in FIGS. 3 and 4 (b), of the pair of pressing rods 38, 40 of the pressing device 28, the pressing rod 38 corresponding to the vertical cord 10a on which the middle cord 10c is to be increased in advance is provided. The other pressing rod 40 is moved forward and fixed with screws 44 and 46, respectively.

  As a result, one vertical cord 10a is pressed in the horizontal direction by the pressing surface 38a of the pressing bar 38 before being cooled, and is stretched by applying tension. Thus, the pitch of the middle cord 10c in one vertical cord 10a can be made larger than the pitch of the middle cord 10c in the other vertical cord 10b. By changing the distance by which the pressing surface 38a pushes out the vertical cord, the distance between the upper and lower middle cords in the pair of vertical cords 10a and 10b can be variously adjusted. For example, if the distance by which the pressing surface 38a pushes out one vertical cord 10a is further increased, the pressing force to the vertical cord 10a increases, so the pitch of the middle cord 10c in one vertical cord 10a is set to the middle of the other vertical cord 10b. The pitch can be further increased as compared with the pitch of the cord 10c.

  As described above, the ladder cord 10 having the adjusted pitch is wound around the drawing roller 26, thereby being cooled by the drawing roller 26 and the shape thereof being stabilized. The ladder code 10 guided by the drawing roller 26 is stored in the storage unit 30 via the transport roller 32.

  In this way, as shown in FIG. 5A-2, the interval between the upper and lower middle cords 10c in one vertical cord 10a is a, and the upper and lower middle cords 10c in the other vertical cord 10b are adjacent to each other. The ladder cord 10 having the same pitch and the same pitch is manufactured, or as shown in FIG. 5 (b-2), the vertical cord 10a adjacent to the upper and lower middle cords 10c has the interval b and the other In the vertical cord 10b, a ladder cord 10 having a different pitch and having an a that is smaller than b between the upper and lower adjacent middle cords 10c is manufactured.

  When a blind is constructed using the ladder cord 10 shown in FIG. 5 (b-2), a horizontal blind is constructed in which the inclination of the slat increases from the top to the bottom as shown in FIG. 5 (b-1). Is done. When this horizontal blind is installed in a window frame 50 as shown in FIG. 6, the sunlight that has passed through the window 51 and entered the room 52 is reflected by the slats 16 and is reflected by the upper slats 16 group. Heading toward the ceiling 54 at the back of the room, the sunlight reflected on the lower slat 16 group is directed toward the ceiling 54 near the window. As a result, the reflected light from the horizontal blinds does not directly hit the occupant, and the reflected light hits the ceiling and becomes an indirect light that illuminates the interior of the room. Can be illuminated evenly.

  According to the present embodiment, ladder cords having various pitch relations on the left and right sides can be manufactured by the same manufacturing apparatus 20 in almost the same process, so that the entire apparatus is made small. And the installation space can be reduced.

  Further, the pressing force by the pressing rods 38, 40 of the pressing device 28 is determined by the distance of the pressing surfaces 38a, 40a of the pressing rods 38, 40 that are pushed out linearly, so that the adjustment is simple and easy to understand. Can do.

  In the above embodiment, the pressing rods 38 and 40 have been described as being easily adjustable manually. However, the present invention is not limited to this, and the pressing rods 38 and 40 may be automatically adjusted. Is possible. For example, a measuring instrument that measures the pitch of the middle cord in each vertical cord of the ladder cord is provided downstream of the drawing roller 26 and connected to the controller, and an actuator connected to the controller is connected to the pressing rod. It is also possible to obtain the middle cord pitch in the vertical cord, compare the left and right pitch difference with the set pitch difference with the controller, and automatically move the push rod forward or backward by the actuator according to the comparison result It is.

DESCRIPTION OF SYMBOLS 10 Ladder code 10a, 10b Vertical code 10c Middle code | cord | chord 20 Manufacturing apparatus 24 Thermal processing apparatus 26 Pull-out roller 28 Press apparatus 38, 40 Press bar 38a, 40a Press surface

Claims (4)

In the method for manufacturing a ladder blind for a horizontal blind having a ladder shape, which includes a pair of vertical cords (10a, 10b) and a plurality of middle cords (10c) connecting the pair of vertical cords,
Feeding the ladder cord (10) to the thermal processing apparatus (24) while maintaining the tension state;
A step of thermoforming the ladder cord with a thermal processing device so that the interval between the upper and lower adjacent middle cords in the pair of vertical cords is the same;
Extracting the thermoformed ladder cord from the thermal processing apparatus;
Pressing at least one vertical cord of the pair of vertical cords of the ladder cord drawn from the thermal processing apparatus;
Cooling the ladder cord against which at least one vertical cord is pressed , and
By adjusting the tension applied to the vertical cord by the pressing, the ladder cord in which the interval between the upper and lower adjacent middle cords in each vertical cord is different from the interval between the upper and lower adjacent middle cords in each vertical cord becomes the same. A method of manufacturing a ladder code for a horizontal blind, wherein any one of the ladder codes can be manufactured.   The tension applied to the vertical cord is determined by a distance by which the pressing surface (38a, 40a) pressing the vertical cord in a direction orthogonal to the vertical cord pushes out the vertical cord. Ladder cord manufacturing method for horizontal blinds. In an apparatus for manufacturing a ladder cord for a horizontal blind having a ladder shape, which includes a pair of vertical cords (10a, 10b) and a plurality of middle cords (10c) connecting the pair of vertical cords,
A thermal processing device (24) that heats the ladder cord in a state in which the ladder cord is fed and the interval between the upper and lower adjacent middle cords in each vertical cord is equal;
A pressing device (28) capable of pressing the vertical code of the ladder code immediately after being heat-molded by the thermal processing device;
The equipped, pressing device (28), Ri grantable der different tension to the pair of vertical code, pressing the vertical code moves separable therefrom linearly from a direction perpendicular to the vertical code A horizontal blind ladder cord manufacturing apparatus comprising a long pressing member (38, 40) having an end having a pressing surface (38a, 40a) that is made possible . Wherein the downstream pressing device, is wound around the ladder cord, claim 3 Symbol mounting horizontal blind ladder cord manufacturing apparatus characterized in that it comprises a roller (26) to cool the ladder cord.