JP5501487B2 - Hot air jet nozzle for tenter and hot air jet device for tenter using the same - Google Patents

Description

The present invention is a tenter which is a type of fiber machine that performs heat treatment, shrinkage, drying, etc. on a woven fabric such as a woven fabric or a knitted fabric.
More specifically, the hot air jetted from the nozzle holes is jetted in the direction perpendicular to the fabric fabric to be transferred, and the hot air is not generated in the process of being supplied to the jet nozzle through the hot air supply duct, The present invention relates to a hot air injection nozzle for a tenter that increases the processing efficiency of a woven fabric by hot air by adjusting the amount of hot air supplied, and a hot air injection device for a tenter using the same.

Generally, in the process of processing a woven fabric such as a woven fabric or a knitted fabric, a heat setting (heat) performed as a pretreatment step of dyeing is performed.
There are a setting process, a drying process as a post-treatment process of dyeing, a shrinking process by heat treatment, and the like, and a tenter is mainly used as an apparatus for performing such a process.

  In general, the tenter includes a chamber in which the woven fabric passes horizontally in the upper space, and is provided with a woven fabric entrance and a woven fabric outlet at the upstream and downstream ends in the transport direction of the woven fabric, respectively; A hot air generating duct disposed in a lower space; a heater coupled to one side of the hot air generating duct; connected to the other side of the hot air generating duct and extending upward; A hot-air supply duct having a plurality of hot-air outlets opening toward one side; a channel-type nozzle body having an inflow end attached to the hot-air outlet of the hot-air supply duct and the other end closed; and a woven fabric of the nozzle body An upper and lower hot air injection nozzle coupled to a surface opposed to each other and formed with a plurality of nozzle holes; installed at the lower end of the hot air supply duct, and the air in the chamber is used as the heater and the hot air generation duct Through then blown into the interior of the hot air nozzle through the suction to hot air supply duct, comprising a blower for injecting the upper and lower surfaces of the textile substrate to hot air through the nozzle hole of the hot air nozzle.

  The total length of the chamber is determined according to the transfer speed and processing conditions in the processing of the woven fabric. The chamber is formed by connecting a plurality of unit chambers having a length equal to the entire length. The fabric dosing entrance and the fabric dosing exit are provided in an upstream / downstream end unit chamber installed at an upstream / downstream end of the unit chamber, respectively.

  In carrying out the heat setting process, the drying process and the shrinking process with a conventional tenter, if the blower and the heater are driven while the fabric is being transferred, the air inside the chamber is transferred to the hot air generating duct through the heater by the blower. The inhaled air is heated by heat exchange while being in contact with the heater to generate hot air of about 180 ° C. to 220 ° C., and the generated hot air is supplied to the inside of the hot air injection nozzle through the hot air supply duct by the blower. The

  The hot air supplied into the hot air spray nozzle is sprayed onto the upper and lower surfaces of the woven fabric through a plurality of nozzle holes formed in the nozzle plate of the hot air spray nozzle to perform a heat setting process, a drying process or a shrinking process. become.

  In Patent Document 1 relating to a conventional tenter, a large number of drying chambers are continuously installed, each drying chamber is separated into an upper end and a lower end, and a burner installed at the lower end and a mixing installed at the upper end. In the tenter where the ducts are alternately installed in the opposite directions in each drying chamber, the inflow passage installed to move the hot air discharged from the mixing duct to the next drying chamber is a lower end of the drying chamber. The tenter hot air system is opened near the burner installation position toward the upper end, and the lower end side is closed so that all surfaces are covered with a partition and opened at the lower end of the next drying chamber. Yes.

  Patent Document 1 is configured such that hot air blown from one end of a mixing duct flows toward the other end of the mixing duct and is jetted onto the upper and lower surfaces of the woven fabric through a plurality of nozzle holes formed in the mixing duct. Has been.

  However, as shown in FIG. 21, the mixing duct is configured in a form in which the nozzle hole H is simply drilled in the flat nozzle plate P, and therefore the hot air injection direction (W2) injected from the nozzle hole H ) Is not injected at right angles to the woven fabric F to be transferred, but is injected in a state inclined with respect to the hot air flow direction (W1), so that the heat setting process, the drying process after dyeing, or the shrinking process by heat treatment There is a problem that is not made gently.

  Therefore, in order to solve the above-described problems, the present applicant (inventor) has developed a method and an apparatus for adjusting the jet direction of high-temperature air and the wind pressure over the nozzles of the tenter and the dryer of Patent Document 2.

  In Patent Document 2, in a tenter including a heat exchanger, a guide duct, and a nozzle having a nozzle hole, an upper surface forms an inclined surface at a certain angle inside each nozzle fastened to the guide duct. A guide plate and a stagnation chamber are formed by attaching a current plate with a large number of nozzle holes perforated, and the nozzle holes of the current plate and the nozzle holes of the nozzle are formed with a certain inclination with respect to the direction in which high-temperature air passes. By embossing so that it has a flat surface and facing the moving direction of the high-temperature air in the flat surface, the hot air sprayed on the upper and lower surfaces of the woven fabric is perpendicular to the upper and lower surfaces of the woven fabric. It is something that is made.

  However, as a result of repeating research and experiments on the tenter according to Patent Document 2, the hot air sprayed onto the woven fabric cannot form a right angle with respect to the woven fabric, and the blowing direction of the hot air is inclined. After the heat setting process and dyeing, it was confirmed that the drying process and the shrinking process by heat treatment were somewhat insufficient.

  Therefore, the present applicant (inventor) has completed the present invention as a result of repeating various experiments and studies in order to solve the problem of Patent Document 2.

Korean Registered Patent No. 10-0475663 Korean Registered Patent No. 10-0078903

  An object of the present invention is such that the spray angle (direction) of hot air sprayed onto the upper and lower surfaces of the woven fabric through the nozzle holes formed in the nozzle plate of the hot air spray nozzle is perpendicular to the upper and lower surfaces of the woven fabric. Thus, after the heat setting process and dyeing, a hot air spray nozzle and a hot air spray device for a tenter using the hot air spray nozzle, in which a drying process and a shrinking process by heat treatment are effectively and sufficiently performed, are provided.

  Another object of the present invention is to prevent the generation of vortex in the process of blowing hot air from the blower through the hot air generation duct and the hot air supply duct to the hot air jet nozzle, and by adjusting the supply amount of hot air, It is an object to provide a hot air jet device for a tenter with further improved processing efficiency.

  In order to achieve the above-described object, the present invention provides a nozzle plate that is horizontally disposed on the side facing the woven fabric and has a plurality of nozzle holes; spaced apart from the nozzle plate on the opposite side of the woven fabric. A hot air inlet is formed at one end of a duct formed in a polygon by the cover plate; and both sides of the nozzle plate and both side edges in the width direction of the cover plate, the other end is closed, and the nozzle hole By bending in the direction opposite to the hot air injection direction from the upstream edge located on the upstream side of the hot air flow direction, the hot air injected from the nozzle hole is injected in a direction perpendicular to the upper and lower surfaces of the fabric. A hot air injection nozzle for a tenter comprising a hot air flow control piece for controlling the flow of hot air.

The hot air flow control piece may be a vertical piece perpendicular to the nozzle plate.
The hot air flow control piece may be an inclined piece formed to be inclined toward the downstream side in the hot air flow direction.

  The hot air flow control piece includes a vertical portion extending vertically from an upstream edge portion of the nozzle hole, and a horizontal portion bent from the front end of the vertical portion toward the closed end. it can.

  The hot air flow control piece may be a curved piece curved from the upstream edge of the nozzle hole toward the downstream edge.

  The hot air flow control piece includes a vertical portion bent at a right angle from the upstream edge portion of the nozzle hole to the nozzle plate, and a curved portion curved from the end portion of the vertical portion to the downstream side in the hot air flow direction. And can consist of

  The tip of the hot air flow control piece may be formed in a semicircular shape.

  In order to achieve the above object, according to the present invention, the woven fabric F passes horizontally in the upper space, and the woven fabric entry port and the woven fabric outlet port are provided at the upstream and downstream ends of the woven fabric transfer direction. A chamber provided; a hot air generating duct disposed in a lower space of the chamber; a heater coupled to one side of the hot air generating duct; supplied through a hot air inlet connected to the other side of the hot air generating duct Hot air supply duct for discharging hot air to a hot air inlet side of a hot air injection nozzle through a hot air outlet provided with a plurality of hot air guide pieces: jetting hot air flowing into the hot air inlet to the fabric cloth, on the side toward the fabric cloth A nozzle plate that is horizontally disposed and has a plurality of nozzle holes, a cover plate that is spaced apart from the nozzle plate on the opposite side of the woven fabric, and connecting both edges of the nozzle plate and the cover plate in the width direction. Both A hot air inlet is formed at one end of the duct formed into a polygon by the plate, the other end is closed, and the direction opposite to the hot air injection direction from the upstream edge located upstream of the hot air flow direction of the nozzle hole A hot air jet nozzle comprising a hot air flow control piece for controlling the flow of hot air so that the hot air jetted from the nozzle hole is jetted in a direction perpendicular to the upper and lower surfaces of the fabric. And a blower that is installed at a lower end of the hot air supply duct, sucks air inside the chamber through the heater and the hot air generation duct, and blows air into the hot air injection nozzle through the hot air supply duct. A hot air spraying device for a tenter is provided.

  The chamber includes an upstream unit chamber in which a woven fabric entrance is formed on the upstream wall; a downstream unit chamber in which a woven fabric outlet is formed on the downstream wall; and between the upstream unit chamber and the downstream unit chamber. At least one or more intermediate unit chambers disposed therein.

  The internal space of the unit chamber is halved into an upstream space and a downstream space, and a plurality of pairs of hot air injection nozzles, one hot air generating duct, one heater and one hot air supply respectively in the upstream space and the downstream space. Ducts and blowers can be provided.

  The hot air injection nozzle, the hot air generation duct, the heater, the hot air supply duct, and the blower installed in each unit chamber may be disposed in the upstream space and the downstream space in opposite directions.

  Hot air control means may be further included to prevent the hot air supplied to the hot air jet nozzle from causing vortex and adjust the supply amount of the hot air.

  The hot air control means is formed between the hot air inlet and the hot air outlet of the hot air supply duct, the hot air upward flow path through which the hot air blown from the blower and flows through the hot air inlet flows upward, and the hot air upward flow A hot air bypass guide plate that divides the hot air rising along the path into a hot air downward flow path that flows downward from the upper end of the hot air upward flow path toward the hot air injection nozzle; provided at the upper end of the hot air supply duct, A hot air reversing guide plate that forms a hot air reversing channel that reverses hot air flowing upward along the hot air upward channel to the hot air downward channel; close to the upper hot air outlet in the hot air downward channel A hot air distribution plate that distributes hot air to the hot air outlet side of the upper and lower hot air injection nozzles; a first air volume adjustment plate that adjusts the opening angle of the flow path between the hot air reversing flow path and the hot air downward flow path; And in the hot air downward flow path It can comprise a second air volume adjusting plate for adjusting the opening angle of the flow path between the upper and lower side hot air nozzle.

The hot air bypass guide plate includes a partition plate that partitions the hot air upward flow channel and the hot air downward flow channel, and a hot air guide plate that connects a lower end of the partition plate and a lower end of the lower hot air inlet. Can be.
The hot air guide plate may be formed in a curved shape so that eddy currents are not generated in the process in which hot air flowing downward along the hot air downward flow path is guided to the hot air inlet of the lower hot air injection nozzle. .

  The hot air reversal induction plate is formed with curved ends at both ends so that vortex is not generated in the process in which hot air rising and flowing along the hot air upward flow path is reversed downward into the hot air downward flow path. Can.

  The hot air distribution plate may include an inclined plate that distributes the hot air flowing downward along the hot air downward flow path to the upper and lower hot air injection nozzles.

  The first air volume adjusting plate has a support end rotatably supported at an upper end of an upper hot air outlet of the hot air supply duct, and in a state of rotating downward, a free end is in contact with an upper end of the hot air bypass guide plate and the hot air It can be configured to close between the reversing flow path and the hot air downward flow path and to open between the hot air reversing flow path and the hot air downward flow path in a state of being rotated upward.

  When the first air volume adjusting plate rotates the first air volume adjusting plate upward to open between the hot air reversing flow path and the hot air reversing flow path, the hot air reversed in the hot air reversing flow path forms a vortex. In order to avoid this, a curved portion can be provided.

  The second air volume adjusting plate has a support end supported by the middle portion of the hot air bypass guide plate so as to be able to rotate up and down, and in a state of rotating upward, its free end contacts the lower end of the hot air distribution plate, The hot air flowing downward in the hot air downward flow path is blocked from being supplied to the lower hot air jet nozzle side, and in the state of rotating downward, its free end deviates from the lower end of the hot air distribution plate, The hot air flowing downward in the downward flow path can be configured to be supplied to the lower hot air injection nozzle side.

  In the present invention, the hot air flow control piece is provided on the upstream side of the nozzle hole formed in the nozzle plate, so that the hot air sprayed on the upper and lower surfaces of the woven fabric through the nozzle hole formed in the nozzle plate of the hot air injection nozzle. By making the spray angle (direction) perpendicular to the upper and lower surfaces of the woven fabric, the drying step and the shrinking step by heat treatment are effective and sufficient after the heat setting step and dyeing.

  In the present invention, since the hot air supply duct is provided with the hot air control means, the generation of the vortex is minimized in the process in which the hot air is blown from the blower to the hot air injection nozzle through the hot air generation duct and the hot air supply duct. By making the spray angle of hot air sprayed on the upper and lower surfaces perpendicular to the upper and lower surfaces of the woven fabric, after the heat setting process and dyeing, the drying process and the shrinking process by heat treatment are effective and sufficient. The

FIG. 2 is a perspective view and a partially enlarged view of an upper and lower hot air jet nozzle in a first preferred embodiment of the hot air jet nozzle according to the present invention. FIG. 3 is a partial enlarged cross-sectional view of an upper and lower hot air spray nozzle in a first preferred embodiment of the hot air spray nozzle according to the present invention. It is a top view which shows an example of the hot air injection apparatus of the tenter to which the hot air injection nozzle by a present Example was applied. It is sectional drawing about the AA line of FIG. It is sectional drawing about the BB line of FIG. It is sectional drawing about the CC line of FIG. It is a fragmentary perspective view which shows the open state of a hot air control means. It is a fragmentary perspective view which shows the closed state of a hot air control means. FIG. 5 is a perspective view and a partially enlarged view of an upper and lower hot air jet nozzle in a second preferred embodiment of the hot air jet nozzle according to the present invention. FIG. 5 is a partial enlarged cross-sectional view of an upper and lower hot air spray nozzle in a second preferred embodiment of the hot air spray nozzle according to the present invention. FIG. 5 is a perspective view and a partially enlarged view of an upper and lower hot air jet nozzle in a third preferred embodiment of the hot air jet nozzle according to the present invention. FIG. 5 is a partial enlarged cross-sectional view of an upper and lower hot air spray nozzle in a third preferred embodiment of the hot air spray nozzle according to the present invention. FIG. 6 is a perspective view and a partially enlarged view of an upper and lower hot air jet nozzle in a fourth preferred embodiment of the hot air jet nozzle according to the present invention. FIG. 6 is a partial enlarged cross-sectional view of an upper and lower hot air spray nozzle in a fourth preferred embodiment of the hot air spray nozzle according to the present invention. FIG. 7 is a perspective view and a partially enlarged view of an upper and lower hot air spray nozzle in a fifth preferred embodiment of the hot air spray nozzle according to the present invention. FIG. 6 is a partial enlarged cross-sectional view of an upper and lower hot air spray nozzle in a fifth preferred embodiment of the hot air spray nozzle according to the present invention. FIG. 6 is a perspective view and a partially enlarged view of an upper and lower hot air jet nozzle in a sixth preferred embodiment of the hot air jet nozzle according to the present invention. FIG. 10 is a side view of an upper and lower hot air jet nozzle in a sixth preferred embodiment of the hot air jet nozzle according to the present invention. FIG. 19 is a cross-sectional view taken along line EE of FIG. 18 in a sixth preferred embodiment of the hot air injection nozzle according to the present invention. FIG. 19 is a cross-sectional view taken along line FF of FIG. 18 in a sixth preferred embodiment of the hot air injection nozzle according to the present invention. It is a partial expanded sectional view of the conventional hot air injection nozzle.

  Hereinafter, preferred embodiments of a hot air jet nozzle for a tenter and a hot air jet device for a tenter using the same according to the present invention will be described in detail with reference to the accompanying drawings.

  1 and 2 show a first preferred embodiment of a hot air jet nozzle of a tenter according to the present invention.

  The hot air spray nozzle 100 of the tenter according to the present embodiment includes a nozzle plate 110 disposed horizontally on the side facing the fabric cloth F and a cover plate disposed separately from the nozzle plate 110 on the opposite side of the fabric cloth F. 120, and both side plates 130 and 140 connecting both side edges in the width direction of the nozzle plate 110 and the cover plate 120 are formed in a duct shape having a square cross section, and the nozzle plate 110 is provided with a plurality of nozzle holes 150.

  One end in the longitudinal direction of the hot air injection nozzle 100 is an open end where a hot air inlet 160 is formed, and the other end is a closed end closed by a closing member 170, and hot air flowing in through the hot air inlet 160 at the open end is closed. It is configured to be sprayed through the nozzle hole 150 while flowing toward the end.

  The internal cross-sectional area of the hot air injection nozzle 100 is configured such that the open end where the hot air inlet 160 is formed is wide and gradually narrows toward the closed end, thereby flowing inside the hot air injection nozzle 100. The hot air injected through the nozzle hole 150 is configured to be uniformly injected over the entire region from the open end to the closed end.

  Therefore, the side plates 130 and 140 are formed such that the edge corresponding to the nozzle plate 110 is formed horizontally, and the edge corresponding to the cover plate 120 is directed toward the nozzle plate 110 from the open end to the closed end. Thus, the cover plate 120 is installed to be inclined toward the nozzle plate 110 from the open end to the closed end corresponding to the side plates 130 and 140.

  The hot air jet nozzle 100 is arranged on the upper and lower sides of the fabric dough F to be transferred in a tenter chamber (described later) so that the nozzle plate 110 faces the upper and lower surfaces of the fabric dough F and is transferred. It is installed so that hot air is jetted onto the upper and lower surfaces of the fabric F.

The nozzle holes 150 are arranged in the longitudinal direction and the width direction of the nozzle plate 110. The nozzle holes 150 arranged in the longitudinal direction are arranged on a straight line at regular intervals, and those arranged in the width direction are arranged in the width direction. They are arranged at regular intervals in a state shifted in the horizontal direction. This is for hot air injection from the nozzle hole 150 to be performed over the entire surface of the woven fabric F.
That is, when the hot air spray nozzle plate 100 is applied to a tenter, the transport direction (D) of the fabric dough F coincides with the width direction of the hot air spray nozzle plate 100. At this time, when the nozzle holes 150 arranged in the width direction are arranged in a straight line, the hot air jetted from the nozzle holes 150 adjacent to each other in the nozzle holes 150 arranged in the width direction of the fabric cloth F to be transferred. In the case where the hot air jet is not sprayed over the entire surface of the woven fabric F and the hot air jet non-applied portion is generated, the ones arranged in the width direction are shifted in the lateral direction. This is because the hot air sprayed from the nozzle holes 150 arranged in the state overlaps each other, so that the hot air spray can be performed over the entire surface of the woven fabric F without the hot air spray non-applied portion.

  The nozzle hole 150 can be formed by punching the nozzle plate 110. Each of the nozzle holes 150 is formed in a rectangular shape by forming both the upstream and downstream side edges S1, S2 and the side edges S3, S4 in a straight line on the basis of the hot air flow direction (W1) in the hot air injection nozzle 100. Although the upstream edge S1 and the side edges S3 and S4 are formed in a straight line, the downstream edge S2 is preferably formed in a semicircular shape (see FIG. 1).

  Hot air sprayed from the nozzle hole 150 is sprayed in a direction perpendicular to the upper and lower surfaces of the woven fabric F at the upstream edge S1 located upstream of the nozzle hole 150 in the hot air flow direction (W1). Thus, a hot air flow control piece 180 for controlling the flow of hot air is provided (see FIGS. 1 and 2).

  The hot air flow control piece 180 is integrally formed with the nozzle plate 110 in the process of punching the nozzle plate 110 to form the nozzle hole 150. That is, in the process of punching the nozzle plate 11 to form the nozzle hole 150, the downstream edge S2 and both side edges S3 and S4 of the nozzle hole 150 are completely cut, but the upstream edge S1 is cut. The hot air flow control piece 180 is formed so as to be bent at the upstream edge S1 of the nozzle hole 150 in the opposite direction of the hot air injection direction (W2), that is, in the opposite direction of the woven fabric F. It is.

  In this embodiment, the hot air flow control piece 180 is a vertical piece 181 that forms a right angle with the nozzle plate 110.

  At this time, the leading edge of the hot air flow control piece 180 is formed in a form corresponding to the downstream edge S <b> 2 of the nozzle hole 150. That is, in the illustrated example, the downstream edge S2 of the nozzle hole 150 is formed in a semicircle, and the tip edge of the hot air flow control piece 180 is also formed in a semicircle correspondingly.

  On the other hand, the downstream edge S2 of the nozzle hole 150 and the tip edge of the hot air flow control piece 180 may be formed in a straight line.

  The hot air flowing into the hot air injection nozzle 100 through the hot air inlet 160 is temporarily blocked by the hot air flow control piece 180 at the position of each nozzle hole 150 while flowing from the open end to the closed end. The hot air flow control piece 180 is bypassed and continues to flow toward the closed end.

  Accordingly, the hot air flowing inside the hot air injection nozzle 100 does not flow directly toward the nozzle hole 150, but instead flows by detouring after being blocked by the hot air flow control piece 180, and this process. Thus, since the hot air passes through the nozzle hole 150 due to the difference between the internal pressure and the external pressure of the hot air injection nozzle 100, the hot air injection angle in the nozzle hole 150 is not affected by the flow rate of the hot air.

  An arrow indicated by a virtual line in FIG. 2 indicates hot air that cannot flow toward the nozzle hole 150 by being controlled by the hot air flow control piece 180.

  As a result, the spray angle (direction) of hot air sprayed from the nozzle hole 150 is perpendicular to the nozzle plate 110 and the woven fabric F.

  FIG. 3 shows an example of a hot air injection device for a tenter to which the hot air injection nozzle according to the present invention is applied.

  The tenter hot-air spraying apparatus is a chamber in which the fabric dough F passes horizontally in the upper space, and the fabric dough entrance 203 and the fabric dough outlet 204 are provided at the upstream and downstream ends in the transfer direction of the fabric dough F. 200; hot air generating duct 300 disposed in a lower space of the chamber 200; a heater 400 coupled to one side of the hot air generating duct 300; hot air coupled to the other side of the hot air generating duct 300 A hot air outlet 520 that extends upward from the inlet 510, opens upward toward one side of the hot air generation duct 300, has an inflow end of the hot air injection nozzle 100, and has a plurality of hot air guide pieces 540 formed therein. A hot air supply duct 500 for discharging hot air to the hot air inlet 160 side of the hot air injection nozzle 100 through the hot air inlet nozzle 100; Hot air injection nozzle 100; installed at the lower end of the hot air supply duct 500, sucks air inside the chamber 200 through the heater 400 and the hot air generation duct 300, and blows air into the hot air injection nozzle 100 through the hot air supply duct 500. And the blower 600 to be operated.

  The length of the chamber 200 is determined in consideration of the transfer speed of the woven fabric F and the hot air contact time required for the heat setting process, the drying process and the shrinking process, and the width is determined in consideration of the width of the woven fabric F. Is done.

The chamber 200 has a length ranging from 10 m to several tens of m for the heat setting process, the drying process, and the shrinking process described above. Although this can be constituted by a single chamber, it is usually constituted by connecting a plurality of unit chambers 200A, 200B, 200C.
The upstream unit chamber 200 </ b> A is provided with an upstream wall 201, the downstream unit chamber 200 </ b> C is provided with a downstream wall 202, and the upstream and downstream walls 201 and 202 have the fabric dough entrance 203 and the fabric dough outlet 204. Is formed.

  The unit chamber 200A is an upstream unit chamber located upstream in the transfer direction of the woven fabric F, the unit chamber 200B is a downstream unit chamber positioned downstream in the transfer direction of the woven fabric F, and the unit chamber 200C is This is an intermediate unit chamber connected between the upstream and downstream unit chambers 200A and 200B. In the illustrated example, only three unit chambers 200A, 200B, and 200C are shown, but a plurality of intermediate unit chambers 200C can be connected according to the process conditions described above.

  The internal spaces of the unit chambers 200A, 200B, and 200C are halved into an upstream space and a downstream space, and a plurality of pairs of upper and lower hot air injection nozzles 100 (four pairs in the drawing) in the upstream space and the downstream space, respectively. One hot air generation duct 300, one heater 400, a hot air supply duct 500, and a blower 600 are provided.

  In addition, the hot air injection nozzle 100, the hot air generating duct 300, the heater 400, the hot air supply duct 500, and the blower 600 installed in each of the unit chambers 200A, 200B, and 200C can be disposed in the same direction. As shown in the illustrated example, it is preferable that those installed in the upstream space and the downstream space are rotationally symmetrical with respect to opposite directions, that is, with respect to the center points of the respective unit chambers 200A, 200B, and 200C.

  The hot air generating duct 300 is disposed from one end to the other end in the width direction of the unit chambers 200A, 200B, and 200C, an air suction port 310 is formed at one end, and a hot air discharge port 320 is formed at the other end. The heater 400 is installed at the air inlet 310.

  The heater 400 may directly use an electric heater or a boiler that generates heat by itself, but in order to minimize the occupied space in the unit chambers 200A, 200B, and 200C, heat connected to an external heat source is used. It is preferable to use an exchanger.

  The hot air supply duct 500 includes a hot air inlet 510 connected to the hot air discharge port 320 of the hot air generation duct 300 at the lower end, and a plurality of hot air outlets 520 opened toward one side at the upper end.

  The hot air inlet 510 is formed at the lower end of the hot air supply duct 500 toward the hot air generation duct 300, and the hot air outlet 520 is formed at the upper end of the hot air supply duct 500 in the same direction as the hot air inlet 510.

  Each of the hot air outlets 520 is installed in a plurality of stages (four in the illustrated example) in upper and lower stages. The edge of the hot air outlet 520 is provided with a nozzle fixing frame 530 for surrounding and supporting the inflow end of the hot air injection nozzle 100.

  The hot air outlet 520 is provided with a plurality (three in the drawing) of hot air guide pieces 540 for guiding the hot air in the longitudinal direction of the hot air injection nozzle 100.

  The inflow end of the hot air injection nozzle 100 is inserted between the upper and lower ends of the hot air guide piece 540 and the upper and lower ends of the nozzle fixing frame 530 so that the inflow end of the hot air injection nozzle 100 can be inserted into the hot air outlet 520. A gap 541 is formed.

  The hot air guide piece 540 may be installed in a hot air inlet 160 formed at the inflow end of the hot air injection nozzle 100.

  The blower 600 preferably uses a centrifugal fan whose suction end is positioned toward one end of the hot air generation duct 300 where the heater 400 is installed and whose discharge end is positioned toward the hot air supply duct 500.

  The heat setting process, the drying process, and the shrinking process of the woven fabric F by the tenter equipped with the hot air jet device according to the present invention will be described.

  In a state where the heater 400 and the blower 600 are operated, the fabric dough F enters through the fabric dough entrance 203 of the upstream unit chamber 200A, passes through the intermediate unit chamber 200C, and pulls the fabric dough in the downstream unit chamber 200B. If it is transferred in a state of being drawn out through the outlet 204, the air in the unit chambers 200 </ b> A, 200 </ b> B, 200 </ b> C is sucked into the hot air generating duct 300 through the air inlet 310 by the suction input of the blower 600.

  At this time, since the heater 400 is installed at the air inlet 310 of the hot air generating duct 300, the air sucked into the hot air generating duct 300 is heated while passing through the heater 400, and the inside of the hot air generating duct 300. Hot air is generated.

  The hot air generated in the hot air generation duct 300 passes through the hot air inlet 510 of the hot air supply duct 500 through the hot air outlet 320 of the hot air generation duct 300 and flows into the hot air supply duct 500.

  The hot air flowing into the hot air supply duct 500 rises through the hot air supply duct 500 and is discharged from a hot air outlet 520 provided at the upper end of the hot air supply duct 500. The hot air discharged from the hot air outlet 520 is the hot air flow. The hot air jet nozzle 100 is supplied through the inlet 160.

The hot air supplied into the hot air spray nozzle 100 is sprayed on the upper and lower surfaces of the woven fabric F through a plurality of nozzle holes 150 formed in the nozzle plate 110 of the hot blast spray nozzle 100, so that the heat setting process of the woven fabric F is performed. The drying process or the shrinking process is performed.
On the other hand, the hot air supply duct 500 is provided with hot air control means for preventing hot air supplied to the hot air injection nozzle 100 from causing vortex and adjusting the supply amount of hot air.

  The hot air control means is formed between the hot air inlet 510 and the upper hot air outlet 520 of the hot air supply duct 500, and the hot air upward flow path through which the hot air blown from the blower 600 and flows through the hot air inlet 510 flows upward. Hot air detour guide plate that divides P1 and hot air rising along the hot air upward flow path P1 into a hot air downward flow path P2 that flows downward toward the hot air injection nozzle 100 at the upper end of the hot air upward flow path P1. 710; a hot air reversing flow path P3 provided at the upper end of the hot air supply duct 500 and for reversing the hot air flowing upward along the hot air upward flow path P1 downward into the hot air downward flow path P2. A hot air reversing guide plate 720; disposed in the hot air downward flow path P2 in the vicinity of the upper hot air outlet 520 and distributes the hot air to the hot air outlet 520 side of the upper and lower hot air jet nozzles 100. A hot air distribution plate 730; a first air volume adjusting plate 740 that opens and closes or adjusts an opening angle between the hot air reversing flow path P3 and the hot air downward flow path P2, and upper and lower hot air in the hot air downward flow path P2. And a second air volume adjusting plate 750 that opens and closes a flow path of hot air supplied to the injection nozzle 100 side or adjusts an opening angle (see FIGS. 6 to 8).

  The hot air bypass guide plate 710 is a hot air connecting the partition plate 711 that partitions the hot air upward flow path P1 and the hot air downward flow path P2, and the lower end of the partition plate 711 and the lower end of the lower hot air inlet 510. And a guide plate 712.

  The hot air guide plate 712 is formed in a curved shape so that eddy current is not generated in the process in which hot air flowing downward along the hot air downward flow path P2 is guided to the hot air inlet 160 of the lower hot air injection nozzle 100. It is preferable.

  The hot air reversing guide plate 720 is curved at both ends so that eddy currents are not generated in the process in which the hot air rising and flowing along the hot air upward flow path P1 is reversed downward to the hot air downward flow path P2. It is preferable to form.

  The hot air distribution plate 730 includes inclined plates 731 and 732 that distribute hot air flowing downward along the hot air downward flow path P2 to the upper and lower hot air injection nozzles 100. The upper ends of the inclined plates 731 and 732 are connected by a curved connecting portion 733.

  The first air volume adjusting plate 740 has a support end rotatably supported at the upper end of the upper hot air outlet 520 of the hot air supply duct 500, and a free end at the upper end of the hot air bypass guide plate 710 in a state of rotating downward. The hot air reversing flow path P3 and the hot air downward flow path P2 are closed in contact with each other, and when rotated upward, the hot air reversing flow path P3 and the hot air downward flow path P2 are opened. Therefore, it is configured to adjust the air volume of the hot air supplied to the upper and lower hot air jet nozzles 100 by adjusting the opening angle.

  The first air volume adjusting plate 740 may be formed in a flat plate shape, but when the first air volume adjusting plate 740 is rotated upward to open the space between the hot air reversing flow path P3 and the hot air downward flow path P2, It is preferable to include a curved portion 741 so that the hot air reversed in the hot air reversing flow path P3 does not form a vortex.

  In order to open and close the first air volume adjusting plate 740, a rotating lever 742 fixedly connected to a support end of the first air volume adjusting plate 740 and rotating integrally with the first air volume adjusting plate 740, and the rotating lever An operating rod 743 that is connected to the free end of 742 by a hinge and is installed so as to be movable up and down is provided. A long hole 744 into which a hinge pin connected to the operation rod 743 is movably inserted is formed at the free end of the rotating lever 742.

  The second air volume adjusting plate 750 has a support end supported by an intermediate portion of the hot air bypass guide plate 710 so as to be vertically rotatable, and in a state where the second air amount adjusting plate 750 is rotated upward, its free end contacts the lower end of the hot air distribution plate 730. However, when the hot air flowing downward in the hot air downward flow path P2 is blocked from being supplied to the lower hot air jet nozzle 100 side and rotated downward, its free end is the lower end of the hot air distribution plate 730. The hot air flowing downward in the hot air downward flow path P <b> 2 can be supplied to the lower hot air injection nozzle 100, and the opening angle is adjusted and supplied to the lower hot air injection nozzle 100. It is configured to adjust the amount of hot air that is generated.

  In order to open and close the second air volume adjusting plate 750, a fixing lever 751 fixedly connected to a support end of the second air volume adjusting plate 740, a connecting lever 752 hinged to the fixing lever 751, and the connection An operating lever 753 that is connected to the lever 752 by a hinge and is installed so as to be capable of horizontal movement is provided.

  The first and second air volume adjusting plates 740 and 750 can be operated using the lever and rod described above, but each of the supporting ends is automatically connected to a rotation driving means such as a servo motor. It can also be configured to be able to.

  When the fabric fabric heat setting process, the drying process and the shrinking process are performed by the hot air jetting device of the tenter of the present invention provided with the air volume control means described above, the first and second air volume adjusting plates 740 and 750 move the upper and lower sides. By adjusting the amount of hot air supplied to the hot air injection nozzle 100, an optimum process can be performed.

9 and 10 show a second preferred embodiment of the hot air jet nozzle according to the present invention.
The hot air injection nozzle 100 according to the present embodiment is configured by an inclined piece 182 formed so that the hot air flow control piece 180 is inclined to the downstream side in the hot air flow direction (W1).

  In the present embodiment, the hot air flow control piece 180 is composed of an inclined piece 182 formed so as to be inclined from the upstream side to the downstream side in the hot air flow direction (W1). The flow resistance against the flowing hot air can be reduced and the hot air flowing in the hot air injection nozzle 100 is prevented from immediately going to the nozzle hole 150, and the hot air injection direction (W2) injected from the nozzle hole 150 Is perpendicular to the nozzle plate 110.

Since the other configuration and operation of the hot air injection nozzle according to the present embodiment are the same as those of the first embodiment described above, the same portions are denoted by the same reference numerals, and detailed description thereof is omitted.
11 and 12 show a third preferred embodiment of the hot air jet nozzle according to the present invention.
The hot air injection nozzle 100 according to this embodiment is such that the hot air flow control piece 180 is bent downstream in the hot air flow direction (W1).

  The hot air flow control piece 180 includes a vertical part 183 extending vertically from the upstream edge S1 of the nozzle hole 150, and a horizontal part 184 bent from the tip of the vertical part 183 toward the closed end. including.

  In this embodiment, since the hot air flow control piece 180 is composed of a vertical part 183 and a horizontal part 184, the hot air flowing inside the hot air injection nozzle 100 is primarily blocked and bypassed by the vertical part 183. Then, it is blocked and detoured secondarily by the horizontal portion 184, so that it is possible to more effectively suppress the hot air from immediately going to the nozzle hole 150, so the hot air injection direction (W2) injected from the nozzle hole 150 is A right angle is formed with respect to the nozzle plate 110.

  In particular, the horizontal portion 184 can more reliably suppress the hot air flowing inside the hot air injection nozzle 100 from moving toward the nozzle hole 150, so that the hot air injection direction (W2) is the nozzle plate 110 and the woven fabric. It works more effectively to make a right angle to F.

Since the other configuration and operation of the hot air injection nozzle according to the present embodiment are the same as those of the first embodiment described above, the same portions are denoted by the same reference numerals, and detailed description thereof is omitted.
13 and 14 show a fourth preferred embodiment of the hot air jet nozzle according to the present invention.
In the hot air injection nozzle 100 according to the present embodiment, the hot air flow control piece 180 is curvedly formed on the downstream side in the hot air flow direction (W1).

  The hot air flow control piece 180 includes a curved piece 185 that is curved in the direction from the upstream edge S1 of the nozzle hole 150 to the downstream edge S2.

  In this embodiment, since the hot air flow control piece 180 is a curved piece 185, the flow resistance against the hot air flowing inside the hot air injection nozzle 100 can be reduced, and the hot air is immediately applied to the nozzle hole 150. The hot air injection direction (W2) injected from the nozzle hole 150 is perpendicular to the nozzle plate 110.

Since the other configuration and operation of the hot air injection nozzle according to the present embodiment are the same as those of the first embodiment described above, the same portions are denoted by the same reference numerals, and detailed description thereof is omitted.
15 and 16 show a fifth preferred embodiment of the hot air spray nozzle 100 according to the present invention.

  In the hot air injection nozzle 100 according to the present embodiment, the hot air flow control piece 180 is bent perpendicularly to the nozzle plate 110 and curved to the downstream side in the hot air flow direction (W1).

  The hot air flow control piece 180 includes a vertical portion 186 bent at a right angle from the upstream edge S1 of the nozzle hole 150 to the nozzle plate 110 and an end of the vertical portion 186 in the hot air flow direction (W1). It consists of a curved portion 187 that is curved downstream.

  In this embodiment, since the hot air flow control piece 180 is composed of the vertical portion 186 and the curved portion 187, the flow of the hot air is more effectively controlled by the blocking and detouring action by the vertical portion 186 and the curved portion 187. As a result, the hot air injection direction (W 2) injected from the nozzle hole 150 of the hot air injection nozzle 100 is perpendicular to the nozzle plate 110.

Since the other configuration and operation of the hot air injection nozzle according to the present embodiment are the same as those of the first embodiment described above, the same portions are denoted by the same reference numerals, and detailed description thereof is omitted.
FIGS. 17 to 20 show a sixth preferred embodiment of the hot air spray nozzle 100 according to the present invention.

  The hot air injection nozzle 100 according to the present embodiment is formed in a corrugated shape having inclined surfaces 111 and 112 in which the nozzle plate 110 is symmetrically inclined toward both sides, and the nozzle hole 150 and the hot air flow control piece are formed on the inclined surfaces 111 and 112. 180 is provided.

  The hot air injection nozzle 100 according to the present embodiment is suitable for restoring a knitted or woven fabric structure that has been pushed or deformed to its original shape.

  That is, since the hot air spray nozzle 100 according to the present embodiment has the nozzle holes 150 formed on the inclined surfaces 111 and 112 that are symmetrically inclined toward both sides, when viewed in the longitudinal direction of the hot air spray nozzle 100, the nozzle holes 150. Since the hot air jetted from the side is jetted in a direction inclined with respect to the knitted fabric or woven fabric, waves are formed in the knitted fabric or the woven fabric by the hot air jetted diagonally, and the organization of the knitted fabric or the woven fabric is utilized. It becomes like this.

  In the present embodiment, the hot air flow control piece 180 has the same form as the fifth embodiment described above, but any of the hot air flow control pieces of the first to fourth embodiments can be adopted.

  As mentioned above, although the specific embodiments have been described in the detailed description of the present invention, it is obvious to those skilled in the art that various modifications can be made within the scope not departing from the scope of the present invention. It can be said that.

  INDUSTRIAL APPLICABILITY The present invention can be applied to a tenter that is a type of fiber machine that performs heat treatment, shrinkage, drying, and the like on a woven fabric such as a woven fabric or a knitted fabric.

DESCRIPTION OF SYMBOLS 100 Hot-air injection nozzle 110 Nozzle plate 150 Nozzle hole 160 Hot-air inlet 170 Closure member 180 Hot-air flow control piece 200 Chamber 200A, 200B, 200C Unit chamber 300 Hot-air production | generation duct 400 Heater 500 Hot-air supply duct 600 Blower 710 Hot-air bypass induction plate 720 Hot air reversal induction plate 730 Hot air distribution plate 740 First air flow adjustment plate 750 Second air flow adjustment plate

Claims (28)

A nozzle plate 110 arranged horizontally on the side facing the fabric cloth F and having a plurality of nozzle holes 150 formed thereon;
The cover plate 120 is spaced apart from the nozzle plate 110 on the opposite side of the woven fabric F; and the both side plates 130 and 140 connecting the both side edges in the width direction of the nozzle plate 110 and the cover plate 120 form a polygon. A hot air inlet 160 is formed at one end of the duct to be closed, the other end is closed, and the hot air injection direction (W2) from the upstream edge S1 located upstream of the hot air flow direction (W1) of the nozzle hole 150. The hot air flow control piece 180 for controlling the flow of hot air so that the hot air jetted from the nozzle hole 150 is jetted in a direction perpendicular to the upper and lower surfaces of the woven fabric F. A hot air spray nozzle for a tenter.   The hot air injection nozzle of a tenter according to claim 1, wherein the hot air flow control piece (180) is a vertical piece (181) perpendicular to the nozzle plate (110).   The hot air jet nozzle of a tenter according to claim 1, wherein the hot air flow control piece 180 is an inclined piece 182 formed to be inclined downstream in the hot air flow direction (W1).   The hot air flow control piece 180 includes a vertical portion 183 extending vertically from the upstream edge S1 of the nozzle hole 150, and a horizontal portion 184 bent from the tip of the vertical portion 183 toward the closed end. The hot air spray nozzle for a tenter according to claim 1, comprising:   The hot air injection nozzle of the tenter according to claim 1, wherein the hot air flow control piece (180) is a curved piece (185) curved in the direction from the upstream edge (S1) to the downstream edge (S2) of the nozzle hole (150).   The hot air flow control piece 180 is bent in a direction perpendicular to the nozzle plate 110 from the upstream edge S1 of the nozzle hole 150, and the hot air flow direction (W1) from the end of the vertical portion 186. The hot air spray nozzle for a tenter according to claim 1, comprising a curved portion 187 that is curved on the downstream side.   The hot air spray nozzle 100 is formed in a corrugated shape having inclined surfaces 111 and 112 in which a nozzle plate 110 is symmetrically inclined toward both sides, and the nozzle holes 150 and the hot air flow control piece 180 are provided on the inclined surfaces 111 and 112. The hot air spray nozzle of a tenter according to claim 1, wherein   The hot air injection nozzle of the tenter according to any one of claims 1 to 6, wherein a tip portion of the hot air flow control piece 180 is formed in a semicircular shape. A chamber 200 in which the woven fabric F passes horizontally in the upper space and is provided with a woven fabric entrance 203 and a woven fabric outlet 204 at the upstream and downstream ends in the transfer direction of the woven fabric F;
A hot air generating duct 300 disposed in a lower space of the chamber 200;
A heater 400 coupled to one side of the hot air generating duct 300;
Hot air supply for discharging the hot air supplied through the hot air inlet 510 connected to the other side of the hot air generating duct 300 to the hot air inlet 160 side of the hot air injection nozzle 100 through the hot air outlet 520 having a plurality of hot air guide pieces 540. Duct 500:
The hot air flowing into the hot air inlet 160 is sprayed onto the fabric cloth F, is arranged horizontally on the side facing the fabric cloth F, and has a plurality of nozzle holes 150 formed therein. At one end of a duct formed in a polygon by a cover plate 120 spaced apart on the opposite side and both side plates 130 and 140 connecting the both side edges of the nozzle plate 110 and the cover plate 120 in the width direction. The inlet 160 is formed, the other end is closed, and the upstream edge S1 located upstream of the hot air flow direction (W1) of the nozzle hole 150 is bent in the direction opposite to the hot air injection direction (W2). A hot air jet nose comprising a hot air flow control piece 180 for controlling the flow of hot air so that the hot air jetted from the nozzle hole 150 is jetted in a direction perpendicular to the upper and lower surfaces of the fabric F. 100; and a blower that is installed at the lower end of the hot air supply duct 500, sucks air inside the chamber 200 through the heater 400 and the hot air generation duct 300, and blows air into the hot air injection nozzle 100 through the hot air supply duct 500. 600. A hot air spraying device for a tenter, comprising: The chamber 200 includes:
An upstream unit chamber 200A having a woven fabric entrance 203 formed in the upstream wall 201;
A downstream unit chamber 200B having a fabric outlet 204 formed in the downstream wall 202; and at least one intermediate unit chamber 200C disposed between the upstream unit chamber 200A and the downstream unit chamber 200B. The hot air jetting apparatus for a tenter according to claim 9, characterized in that:   The internal spaces of the unit chambers 200A, 200B, and 200C are halved into an upstream space and a downstream space, and a plurality of pairs of hot air injection nozzles 100 are vertically provided in the upstream space and the downstream space, respectively. The hot air injection device for a tenter according to claim 10, comprising 300, a heater 400, a hot air supply duct 500, and a blower 600.   The hot air injection nozzle 100, the hot air generating duct 300, the heater 400, the hot air supply duct 500, and the blower 600 installed in the unit chambers 200A, 200B, and 200C are arranged in opposite directions in the upstream space and the downstream space. The hot air jetting apparatus for a tenter according to claim 11, wherein   The hot air supply duct 500 further includes hot air control means for preventing hot air supplied to the hot air jet nozzle 100 from causing vortex and adjusting the supply amount of hot air. The hot air jetting device for a tenter according to claim 9, wherein the hot air jetting device is a tenter. The hot air control means includes
A hot air upward flow path P1 that is formed between the hot air inlet 510 and the hot air outlet 520 of the hot air supply duct 500 and flows upward through the hot air inlet 510 and blown from the blower 600, and the hot air upward flow A hot air detour guide plate 710 that partitions hot air rising along the path P1 into a hot air downward flow path P2 that flows downward from the upper end of the hot air upward flow path P1 toward the hot air injection nozzle 100;
A hot air reversing induction plate is provided at the upper end of the hot air supply duct 500 and forms a hot air reversing flow path P3 for reversing hot air flowing upward along the hot air upward flow path P1 downward to the hot air downward flow path P2. 720;
A hot air distribution plate 730 disposed in the hot air downward flow path P2 in the vicinity of the upper hot air outlet 520 and distributing hot air to the hot air outlet 520 side of the upper and lower hot air injection nozzles 100;
A first air volume adjusting plate 740 for adjusting an opening angle of the flow path between the hot air reversing flow path P3 and the hot air downward flow path P2, and a flow path between the upper and lower hot air injection nozzles 100 in the hot air downward flow path P2. The hot air jetting device for a tenter according to claim 13, further comprising a second air volume adjusting plate 750 for adjusting the opening angle of the tenter.   The hot air bypass guide plate 710 is a hot air connecting the partition plate 711 that partitions the hot air upward flow path P1 and the hot air downward flow path P2, and the lower end of the partition plate 711 and the lower end of the lower hot air inlet 510. The hot air jetting device for a tenter according to claim 14, comprising a guide plate 712.   The hot air guide plate 712 is formed in a curved shape so that eddy currents are not generated in the process in which hot air flowing downward along the hot air downward flow path P2 is guided to the hot air inlet 160 of the lower hot air injection nozzle 100. The hot air jetting device for a tenter according to claim 15, wherein:   The hot air reversing guide plate 720 is curved at both ends so that eddy currents are not generated in the process in which the hot air rising and flowing along the hot air upward flow path P1 is reversed downward to the hot air downward flow path P2. The hot air spraying device for a tenter according to claim 14, wherein the tenter hot air spraying device is formed as follows.   The hot air distribution plate 730 includes inclined plates 731 and 732 that distribute hot air flowing downward along the hot air downward flow path P2 to the upper and lower hot air injection nozzles 100, respectively. 14. A hot air jetting apparatus for a tenter according to 14.   The first air volume adjusting plate 740 has a support end rotatably supported at the upper end of the upper hot air outlet 520 of the hot air supply duct 500, and a free end at the upper end of the hot air bypass guide plate 710 in a state of rotating downward. The hot air reversing flow path P3 and the hot air downward flow path P2 are closed in contact with each other, and when rotated upward, the hot air reversing flow path P3 and the hot air downward flow path P2 are opened. The hot air jetting device for a tenter according to claim 14, characterized in that:   The first air volume adjusting plate 740 is reversed in the hot air reversing flow path P3 when the first air flow adjusting plate 740 is rotated upward to open the space between the hot air reversing flow path P3 and the hot air reversing flow path P2. The hot air jetting device for a tenter according to claim 19, further comprising a curved portion 741 so that the hot air does not form a vortex.   The second air volume adjusting plate 750 has a support end supported by an intermediate portion of the hot air bypass guide plate 710 so as to be vertically rotatable. Then, the hot air flowing downward in the hot air downward flow path P <b> 2 is blocked from being supplied to the lower hot air jet nozzle 100 side, and in the state of rotating downward, its free end is the lower end of the hot air distribution plate 730. The hot air jet of the tenter according to claim 14, wherein the hot air flowing downward in the hot air downward flow path P <b> 2 is supplied to the lower hot air jet nozzle 100 side. apparatus.   10. The hot air jetting device for a tenter according to claim 9, wherein the hot air flow control piece 180 is a vertical piece 181 perpendicular to the nozzle plate 110.   10. The hot air jetting device for a tenter according to claim 9, wherein the hot air flow control piece 180 is an inclined piece 182 formed to be inclined downstream in the hot air flow direction (W 1).   The hot air flow control piece 180 includes a vertical portion 183 extending vertically from the upstream edge S1 of the nozzle hole 150, and a horizontal portion 184 bent from the tip of the vertical portion 183 toward the closed end. The hot air jetting device for a tenter according to claim 9, comprising:   10. The hot air jetting device for a tenter according to claim 9, wherein the hot air flow control piece 180 is a curved piece 185 curved from the upstream edge S <b> 1 to the downstream edge S <b> 2 of the nozzle hole 150.   The hot air flow control piece 180 is bent in a direction perpendicular to the nozzle plate 110 from the upstream edge S1 of the nozzle hole 150, and the hot air flow direction (W1) from the end of the vertical portion 186. The hot air jetting device for a tenter according to claim 9, comprising a curved portion 187 curved at the downstream side.   The hot air injection nozzle 100 is formed in a corrugated shape having inclined surfaces 111 and 112 in which a nozzle plate 110 is symmetrically inclined toward both sides, and the inclined surfaces 111 and 112 are provided with the nozzle hole 150 and a hot air flow control piece 180. The hot air jetting device for a tenter according to claim 9, wherein: The hot air jetting device for a tenter according to any one of claims 9 and 22 to 27, wherein a front end portion of the hot air flow control piece 180 is formed in a semicircular shape.