JP3187185B2 - Method and apparatus for shrinking a strip - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for shrinking a band-like material, and more particularly, to shrinking the above-mentioned band-like material by applying shrinkage energy to a cloth such as a woven or non-woven fabric, or a band such as a film or sheet. The present invention relates to a method of shrinking a band to be caused and a device for shrinking a band to carry out the method of the present invention.

[0002]

2. Description of the Related Art Strips such as woven fabrics are completely shrunk during drying so as not to shrink again from the viewpoint of dimensional stability (shrink-proof processing). Conventionally, in order to shrink the above-mentioned band-like material, a shrinking device using a stretching machine (such as a tenter) for a film or the like in a reverse direction is known. This is a type of shrinking device that conveys the band into a heat treatment furnace by an endless conveyor in order to dry and heat-treat (shrink) the band. A pair of pin chains or grips is attached to both ends of the band. It has a mechanism that can be held continuously by a chain or the like. With respect to the guide width of the pair of chains at both ends of the band, there are a guide width gradually narrowing and a constant width.The former grips the band in a tensioned state, and the latter holds the width of the band. Hold and use in a state where it sags in the direction.

Although not intended for shrinkage treatment, Japanese Patent Publication No. 45-32399 discloses a tensionless (sliding-free) complete feeding device for a long strip. In this apparatus, a large number of guide rollers are rotatably installed in a heat treatment machine, or installed so as to be able to rotate positively, and the belt is suspended in a fixed loop between the guide rollers. The strip is continuously processed, and the strip can be shrunk.

A cloth drying apparatus described in Japanese Patent Publication No. 60-6470, of the type in which a cloth (a strip) is interposed between two upper and lower layers of a conveyor net and the cloth runs along with the conveyor net. Was developed. This shrinking device injects hot air from nozzles arranged in a zigzag manner up and down with the conveyor net interposed,
The cloth is rubbed and dried while causing the cloth to make a wavy motion, and furthermore, it is intended to impart a shrinkage effect and a relaxation effect to the cloth.

[0005]

However, in the above-described shrinking device using a stretching machine for a film or the like in the reverse direction, any shrinking device having any of the above-described guide widths is capable of shrinking the band-like material. It is contracted by force,
Its shrinkage does not exceed at most 10%. In this shrinking device, the gripping portions at both ends of the band-shaped material are lost, and the band-shaped material having a small shrinking force may not be able to contract due to its own weight, and hot air is used as shrinking energy. In this case, there is a problem that shrinkage may be hindered due to flapping of the band, and further, since the guide width is fixed, a band having a significantly different shrinkage rate cannot be processed.

Further, the tensionless (sliding-free) complete feeding device for a long strip described in Japanese Patent Publication No. 45-32399 described above tends to meander the strip easily due to the turbulence of the internal air flow. During operation, there is a problem that an ideal loop shape cannot be maintained due to the inertial force of the band, causing troubles, and further, it is difficult to control a contraction rate of the band.

A shrinking device of the type represented by the fabric drying device described in Japanese Patent Publication No. 60-6470 is described below.
Although the performance is higher than that of the above, the purpose is to combine the shrink-proofing and drying of the fabric, and therefore, in the case of a band having a large shrinkage, meandering or uneven shrinkage locally occurs. Or may occur. In addition, since the band-like object is caused to move in a wavy manner by the air pressure of the hot air injected from the nozzle, a large wind force is required when the self-weight of the band-like object is heavy, so that a large tension is applied to the band-like object or in an extreme case. It is impossible to make the belt-like object make a wavy motion, and therefore, there is a possibility that the belt-like object cannot be contracted due to resistance between the belt and the conveyor net. Also,
When the band is a mesh having a high air permeability (for example, a net), the band cannot move at all in a wavy manner, and therefore contracts due to resistance between the belt and the conveyor net. There is a problem that it may not be possible.

Accordingly, an object of the present invention is to control the shrinkage in the width direction of a band without being influenced by the weight of the band or the magnitude of air permeability, and to uniformly and highly shrink the band. It is an object of the present invention to provide a method and an apparatus for shrinking a belt-like material, which can be shrunk.

[0009]

SUMMARY OF THE INVENTION The present inventor has proposed a conventional type in which a strip such as a cloth is placed on a conveyor net and conveyed in a heat treatment furnace for drying and heat treatment (shrinkage treatment). As a result of various studies on the case of shrinking the band-like material in the shrinking device of the above, no problem occurs when the above-mentioned band-like material is non-shrinkage or when it shrinks only slightly even when shrinking, In the case of shrinkage, attention is paid to the occurrence of uneven shrinkage, the following consideration is given to the cause, and the above problem is solved by improving the manner of contact between the strip and the conveyor net (conveyor). It was found that it could be solved.

First, as a result of conducting a detailed investigation on the phenomenon of uneven shrinkage (unevenness of shrinkage) of the above-mentioned band-like material,
There is a certain tendency in the non-uniformity of shrinkage, that is,
It has been found that the shrinkage in each part of the band in the width direction is lower at the center than at both ends. At this time,
Although the above-mentioned conveyor net was made of a metal having a mesh of 20 mesh, reproducibility of the above tendency was observed even when the conveyor net was changed to another one.

FIG. 16 shows a contraction model of a belt-like object considered in order to pursue the cause of the above tendency.
FIG. 16A is a cross-sectional view of a belt-like object placed on a conveyor net as viewed from the transport direction. FIG. 16B is a view of the belt-like material shown in FIG. In a model in which each of the divided portions is replaced by a model in which each of the divided portions is connected with a non-stretching and tensioned thread (upper part), and a figure (lower part) showing a state in which all of the above-mentioned contractile objects are contracted in the model. is there. FIG. 16C is a view showing three cases in which each of the contractible objects at each position contracts independently.

In the above model, when the contractible object (hereinafter, simply referred to as an object) contracts, the length of the object becomes shorter. Therefore, the objects are attracted to each other, and FIG.
As shown in (b), each object 26 is drawn to the center by the balance of the forces. At this time, since the object 26 moves while contacting the conveyor net 25, a resistance force is generated.

Since the resistance acting on the object 26 differs depending on the position of the object 26, it is considered that the above-mentioned non-uniformity of contraction has occurred, and the resistance acting on the object 26 at each position is calculated by the model. I decided to think. The five objects 26, 26,. . Are located symmetrically, they are classified into three types: an object A located at the center, an object C located at the end, and an object B located at the middle.
Considering the resistance applied to each of the objects A, B, and C, the following is obtained.

For simplicity, considering what happens when the above objects A, B, and C contract independently, first, when only the object A contracts, another object is reduced by the size of the contraction of the object A. Since the object A is located at the center, it is necessary to draw all four other hatched objects as shown in the upper part of FIG.
That much resistance will be generated.

Next, when only the object B contracts, other objects are drawn as in the case of the object A.
When the weights of the objects located on the left and right of the object B are compared, the weight is equal to the center side 3 with respect to the end side 1.
As shown in the middle of FIG. 6 (c), the three objects located at the center of the object B do not move, and the object B itself and the end object C, which are hatched, move to the center. In this case, only the resistance of two objects is generated.

When only the object C contracts, the object C tries to attract the other four objects. However, since the object C is located at the end, as a result, the lower part of FIG. As shown in (1), the shaded object C itself is drawn toward the center side, and in this case, only the resistance when one object moves is sufficient.

Considering the above three cases superimposed, five objects 26, 26,. . If all contract at the same time, only the amount of movement of each object 26 changes, and the contraction force does not change. Therefore, the magnitude relation of the resistance force is the same as the three cases where the object 26 individually contracts. It will be the same. Therefore, it is clear that the object A located at the center where a large resistance force is applied cannot contract much as compared with the object C located at the end with the same contraction force.

Based on the above-described model considerations and the actual case, a method for uniformly shrinking the strip was further studied. FIG. 17 is different from the model shown in FIG. 16B only in that the tensioned yarns at the divided portions in the model of FIG. 16B are replaced with non-tensioned (loosened) yarns. FIG. 16 showing the second model
FIG. 17B is a diagram corresponding to the upper stage (upper stage), and FIG. 16B is a diagram corresponding to the lower stage (lower stage) showing a state in which all of the contractible objects are contracted in the second model.

The above five contractible objects 26, 26,. .
Of the yarns 28, 28,. . Is in a non-stressed state, as shown in FIG.
Are also considered to be able to contract independently as well. However, in the actual case, the yarn 28 must also be a band-like material.
8 'is used. Therefore, each object 26, 2
6 ,. . And the shrinking yarns 28 ', 28',. .
Of the yarns 28 ', 28',. . If the slack amount of the five objects 26, 26,. . Are considered to be able to shrink evenly.

FIG. 1 shows an example of a shape formed in the width direction of the band 2 which can be considered when the conclusion of the above-mentioned consideration based on the model is applied to an actual band 2. As shown in FIG. 1, the present inventors partially contact a belt-shaped object with a transporting body (such as a conveyor net) 1 in the width direction and allow a portion not in contact with the transporting body 1 to have slack. It has been found that the above problem can be solved by adopting a wavy shape. However, since the strip 2 is usually sent into the transport body 1 through a flat roll or the like, the strip 2 does not naturally have the above-described wavy shape. Therefore, it is necessary to form the belt-like material 2 into the above-mentioned corrugated shape before sending the belt-like material 2 (to perform the shrinking process while transporting) to the transporting body 1.

[0021] The method of the present invention is based on the above-mentioned knowledge, and the shrinkage energy is imparted to the strip while the strip is transported by a transporter that transports the strip while contacting the strip. In addition, a method of shrinking the band-like material for shrinking the band-like material, characterized in that the band-like material is formed in a corrugated shape so as to partially contact the carrier in the width direction before contracting. The present invention provides a method for shrinking a band-like material.

Further, the apparatus of the present invention has been made based on the above findings, and includes a carrier for conveying the band while contacting the band, and a contraction of the band being conveyed by the carrier. In a band-shaped material shrinking device having an energy applying section for applying energy to shrink the band-shaped object, the band-shaped object is supplied to the band-shaped material supply side of the energy applying section, and the width direction shape of the band-shaped object is provided. Is provided in at least one place, and a plurality of protrusions are alternately opposed to each other on both sides of the strip, and the width direction of the strip is formed on the both sides of the strip. A strip-shaped object provided so as to have a predetermined interval, and provided so that the tip of each protrusion on one side cuts into the inside of a line connecting the tips of the protrusions provided on the other side. Provides contraction device Is shall.

[0023]

According to the method for shrinking a band-shaped object of the present invention, when the band-shaped object is contracted by applying shrinkage energy while being conveyed by a carrier, the band-shaped object is previously corrugated in the width direction. Only the valleys of the wavy shape are in contact with the carrier, and the portions other than the valleys have a curved shape, and the portions that are not in contact with the carrier are contracted with the contraction of each portion of the strip. The valleys are deformed so that the curvature becomes gentle (the bend is extended), and the valleys are contracted so as to exist independently. For this reason, the frictional resistance received by the respective portions in the width direction of the strip from the transport body is almost equal everywhere, and the strip has only the wavy valleys in contact with the transport body. The above frictional resistance is smaller than that of the belt-like material.

According to the band-shaped object shrinking device of the present invention, the band-shaped object is provided on the wavy shape forming part, which is provided on both sides of the band so as to face each other alternately and so that their tips bite each other. After passing between the rows of the plurality of protrusions, the shape in the width direction is made into a wavy shape in the wavy shape forming portion, and then conveyed to the energy applying portion.

[0025]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a belt-like material shrinking method according to an embodiment of the present invention, together with an embodiment of a belt-like material shrinking device according to the present invention. explain. 2 to 5 show an embodiment of the apparatus for contracting a band-shaped object according to the present invention, FIG. 2 is a side view of the apparatus for contracting a band-shaped object according to this embodiment, and FIG. FIG. 4 is a front view showing a state in which the band is passed through the corrugated portion of FIG. 3, and FIG. 5 is a plan view of the corrugated portion of FIG. It is a front view which shows the biting state partially enlarged.

As shown in FIG. 2, the belt-shaped object shrinking apparatus of this embodiment is provided with an endless carrier 1 made of an endless lattice or a conveyer, which rotates counterclockwise toward the paper surface, at the lower portion of the apparatus main body a. A corrugated portion 3 is provided on the entry side (right side) of the apparatus main body a. In the apparatus main body a, a heat exchanger 6 is provided in the upper part, a rectifier 7 with a filter is provided above the carrier 1 in the center part, and a suction box 8 is provided in the lower part. Is provided with a blower 4 and ducts 5 and 9 connected to the inlet and outlet sides thereof, respectively. Then, the airflow sent by the blower 4 and sent through the duct 5 is dried and heated through the heat exchanger 6, and is conveyed on the carrier 1 of the energy applying unit 24 through the rectifier 7 with a filter. After being sprayed on the belt-like material 2 being blown and blown onto the belt-like material 2, it is passed through the inside of the carrier 1, absorbed in the suction box 8, passed through the duct 9, and returned to the blower 4 again. It is configured. That is, the contraction device for the band 2 is provided with a circulation system.

As shown in FIG. 2, a band 2 such as a cloth is supplied from the right side through the corrugation forming section 3, is placed on the carrier 1 and is carried into the apparatus main body a. While being conveyed, the thermal energy is transmitted from the hot air blown through the rectifier 7 with the filter in the energy imparting section 24 to cause contraction. After the contraction is completed, the apparatus main body is placed on the carrier 1 and It is carried out to the exit side (left side) of a.

In the method for shrinking a belt-like material according to the present embodiment, as shown in FIG. 1, the belt-like material 2 is brought into partial contact with the carrier 1 in the width direction before being shrunk. It is formed in a wavy shape.

As shown in FIGS. 2 to 5, in the apparatus for contracting a band-shaped material according to the present embodiment for carrying out the method for contracting a band-shaped material according to the present embodiment, the band-shaped material At least one wavy shape forming part 3 that makes the shape of the object 2 in the width direction into a wavy shape is provided, and the wavy shape forming part 3 includes a plurality of protrusions 13 at positions on both sides of the strip 2. Are provided so as to face each other alternately and have a predetermined interval in the width direction of the strip 2, and furthermore, each of the protrusions 13 located on the both sides is formed such that the tip of each of the protrusions 13 on one side is the other. End b of each protrusion 13 on the side of
Is provided so as to cut into the inside of the line 15 connecting.

The device for contracting a band-shaped object according to this embodiment will be further described. As shown in FIGS. 3 and 4, the corrugated portion 3 has a plurality of protruding bodies (protrusions) having parabolic peaks. Bars 12 having a length 13 longer than the width of the strip 2 are attached to the front and back sides of the strip 2 by jigs 14 at both ends so as to be parallel to the width direction. The protrusions 13 located on both sides of the band 2 are installed so as not to contact the protrusions 13 on the opposite side. As shown in FIG. 5, the protrusion 13 provided on one of the bars 12 interferes with the straight line 15 connecting the tips b of the adjacent protrusions 13 provided on the other opposite bar 12 by 10 mm or more. (Eaves 10 mm or more into the position beyond the straight line 15). The jig 14 has the two bars 12 movably mounted in the plane including the bars 12 and the projections 13 so as to be vertically movable with respect to the bars 12. In this case, the amount of interference (the amount of bite) between the projections 13 can be adjusted.

It is preferable that the tip b of the projection 13 has a smooth shape because the tip b comes into direct contact with the strip 2. The material of the projection 13, the bar 12, the jig 14 and the like is not particularly limited, but preferably has a strength that does not bend when a pressing force is applied to the belt-like material 2, and particularly, the tip of the projection 13 For b, it is preferable to use a material having excellent wear resistance.

In the band-shaped object shrinking apparatus of the present embodiment configured as described above, the band-shaped object 2 supplied from the entrance side of the apparatus main body a through the wave-shaped forming section 3 is used. In FIG. 3, the projection 13 is pressed as shown in FIG. 4 to form a wavy shape in which peaks and valleys are alternately arranged in the width direction, and the wavy strip 2 is shown in FIG. As described above, the thermal energy is transferred from the hot air blown in the energy applying section 24 while being conveyed by the carrier 1 while being placed on the carrier 1 and carried into the apparatus main body a, thereby causing contraction.

For this reason, when the belt-shaped material 2 contracts, the portions not in contact with the carrier 1 are deformed such that the corrugations become gradual (extend the bends) as the respective portions are contracted. The valleys (contact portions with the transport body 1) shrink so as to exist independently. Therefore, the frictional resistance of each part of the strip 2 in the width direction received from the transport body 1 is equal everywhere.
By appropriately adjusting the amount of interference and the pitch of the wave shape in the above, the strip 2 can uniformly shrink in the width direction. In addition, since only the wavy valleys of the strip 2 are in contact with the carrier 1 and the frictional resistance is smaller than that of a flat strip that contacts the entire surface,
High shrinkage is possible and efficient use of shrinkage energy is possible.

FIGS. 6 to 12 are views corresponding to FIGS. 3A and 3B, respectively, showing the corrugated forming portions 3 in the second to eighth embodiments of the strip-shaped object shrinking apparatus according to the present invention. The third embodiment is different from the first embodiment, and the other points are the same as those of the first embodiment.

The corrugated portion 3 in the second embodiment shown in FIG. 6 uses a bar curved in a U-shape as the protruding body 16. The corrugated portion 3 in the third embodiment shown in FIG. 7 is obtained by integrating the bar 12 and the protruding body 13 in the first embodiment into a protruding body (curved bar) 17. In each of the pair of curved bars 17 located on both sides, a portion curved convexly to the side facing each other functions similarly to the projection 13 in the first embodiment. The wave-shaped forming part 3 in the fourth embodiment shown in FIG. 8 replaces the curved bar 17 (see FIG. 7) in the third embodiment with a protruding body (irregular plate) 18 and forms the wave-shaped distance of the strip 2. Is a guide plate having a longer length. The above-described first to fourth embodiments are preferably used particularly when the conveying speed of the strip 2 is relatively low or when the strip 2 is not damaged by friction.

FIG. 9 (a) is a front view showing the corrugated portion 3 in the fifth embodiment, and FIG. 9 (b) is a side view. The corrugated portion 3 in the fifth embodiment replaces the protrusion 13 and the bar 12 in the first embodiment with the protrusion (roll) 1.
9 and a shaft 20 passing through the center of the roll 19, and the roll 19 is rotatable using a bearing or the like so that the relative speed with the strip 2 can be reduced to zero or as small as possible. . The roll 19 may be configured such that the shaft 20 is fixed and the roll 19 is rotated, or the roll 19 is fixed to the shaft 20 and the shaft 20 and the roll 19 are integrally rotated. You may do it. If necessary, the roll 1
9 (or the roll 19 integrated with the shaft 20)
May be driven so as to be synchronized with the speed of the strip 2.

The corrugated portion 3 in the sixth embodiment shown in FIG. 10 includes the roll 19 and the shaft 2 in the fifth embodiment.
0 (see Fig. 9) and a protruding body (roll with unevenness)
19 '. The corrugated portion 3 in the seventh embodiment shown in FIG. 11 is different from the projection 1 in the first embodiment.
3 (see FIG. 3) is replaced with a roll 22 and a roll fixing jig 23. These can make the corrugated portion 3 of the fifth embodiment (see FIG. 9) compact from a different viewpoint. Instead of using a single shaft extending in the width direction as in the fifth embodiment, a shaft is provided for each roll 22. The feature of the corrugation forming part 3 of the seventh embodiment is that the amount of interference (the amount of bite) of the rolls 22 located above and below without depending on the position of the axis of each roll 22 can be increased. is there. Actually, when the amount of interference is the same, the diameter of the roll 22 in the corrugated forming section 3 of the seventh embodiment is almost half that of the roll 19 of the fifth embodiment. .

The corrugated portion 3 in the eighth embodiment shown in FIG. 12 is a pair of upper and lower bars 21 in the seventh embodiment.
Is replaced with a jig 24 for fixing each bar 21 to the frame, ceiling, floor, or the like of the device on the side opposite to the strip 2. Also in the first to sixth embodiments, it is possible to replace the jig 14 in each embodiment with a jig 24 of this type. The above-described fifth to eighth embodiments are preferably used particularly when processing the strip 2 at a high speed or when processing the strip 2 which is significantly worn. The second
The same effects as those of the first embodiment can be obtained in the band-shaped object contracting apparatus in any of the eighth to eighth embodiments.

FIG. 13 is a view corresponding to FIG. 2 showing still another embodiment (a ninth embodiment) of the strip-shaped object shrinking device of the present invention. In this embodiment, the carrier 1 composed of an endless lattice or a conveyor in the first embodiment (see FIG. 2) is replaced with a carrier 10 using a roller conveyor, and the belt 2 in the apparatus main body a is carried out. The difference from the first embodiment is that the transport body in the vicinity of the part is a suction drum 11 for winding and transporting the belt-shaped material 2,
Except for these points, the configuration is the same as that of the first embodiment. In the device for contracting a band-shaped material according to the ninth embodiment, the first
The same effect as that of the embodiment can be obtained.

Next, the results of experiments (A and B) of shrinkage processing performed by the method for shrinking a band-shaped material of the present invention will be described. Experiment A. [Experimental Conditions of Examples 1 to 3 and Comparative Example 1] The belt-shaped shrinking device has a furnace length of about 3 m as shown in FIG. 2, a PET resin 20 mesh type is used for the conveyor, and a type shown in FIG. did. The curved bar 17 in the wavy shape forming section 3 is a metal wire having a diameter of 5 mm and the distance between the protruding portions is 15 mm.
It was processed so as to have a pitch of 0 mm (wavelength), and was fixed by a commercially available angle (L50 × 50) so that the interference amount (bite amount) became 50 mm. Strip 2
A heat-shrinkable cloth having a width of 1 m and a basis weight of 50 g / m ² was used, and the band 2 was heat-treated at a temperature of 150 ° C. at a processing speed of 10 m / min to be thermally shrunk.

Embodiment 2 FIG. The experiment conditions were the same as those in Example 1, except that the amount of interference in the wave shape forming section 3 was 30 mm. Embodiment 3 FIG. The same experimental conditions as in Example 1 were used, except that the wave-shaped portion 3 was of the type shown in FIG. 6 and the amount of interference was 35 mm. The U-shaped bar 16 in the corrugated portion 3 was formed by processing a metal wire having a diameter of 3 mm and attached to the bar 12 such that the U-shaped bars 16 in the same direction were spaced at 100 mm intervals (wavelength).

Comparative Example 1 As a method generally performed conventionally, except that the band-shaped material shrinking device used in Examples 1 to 3 does not include the corrugated portion 3,
The same experimental conditions as in Examples 1 to 3 were used. That is, the fabric was placed directly on a conveyor and processed in a flat state without irregularities. Table 1 summarizes the experimental conditions of Examples 1 to 3 and Comparative Example 1.

[Experimental Results of Examples 1 to 3 and Comparative Example 1]
In order to evaluate the experimental results of Examples 1 to 3 and Comparative Example 1,
The measurement was carried out by dividing the above-mentioned cloth having a width of 1 m into five equal parts in the width direction and measuring the shrinkage ratio in each part. For example, since a portion of 200 mm shrinks by 20 mm when it becomes 180 mm, it was calculated that 20 ÷ 200 × 100 = 10% contracted, and the average value of 10 points measured for each portion was taken as the shrinkage ratio of that portion. In addition, in order to quantify the degree of variation in the width direction of the cloth, an average value of the shrinkage rates of the respective portions and a variation rate thereof (variance σ ÷ average value × 100) were obtained. Experimental results of Examples 1 to 3 and Comparative Example 1 are shown in Table 2 and FIG.

[0044]

[Table 1]

[0045]

[Table 2]

From Table 2 and FIG. 14, it can be seen that the shrinkage rates of Examples 1 to 3 are all higher than that of Comparative Example 1. Since the thermal conditions are all the same, the contraction force generated in the band 2 should be equal, and if the resistance between the conveyor and the band 2 is equal, the contraction rate should be the same. However, since the shrinkage ratio is increased, it can be seen that the frictional resistance between the conveyor and the strip 2 is reduced in Examples 1 to 3 than in Comparative Example 1. Furthermore, when comparing the fluctuation rates which are indicators of the uniformity shown in Table 2, Examples 1 to 3 are shown.
Is smaller than Comparative Example 1. In particular, in Example 3, the variation rate was about 1/10 of that of Comparative Example 1, and uniform shrinkage was realized. Paying attention to Examples 1 to 3, the contraction rate and the variation rate are different only by the difference in the wave shape in the wave shape forming section 3. In other words, the rigidity of the strip 2, the frictional resistance with the conveyor,
There are optimum conditions depending on the shrinkage ratio and the like, and by finding such conditions, more preferable uniform shrinkage becomes possible.

Next, an experiment B in which the friction between the belt 2 and the conveyor is larger than that in the experiment A will be described. Experiment B. [Experimental Conditions of Example 4 and Comparative Example 2] The device for shrinking a band-like material has a furnace length of about 7 m as shown in FIG. 2, and a conveyor having a plain weave of a metal wire of 20 mesh is used, and a corrugated portion 3 of the type shown in FIG. It was used. The roll 22 in the corrugated portion 3 is made of aluminum having a diameter of 70 mm and a width of 20 mm, and the bar 21 is made of a commercially available angle (L65 × 65).
× 8) was used. In one bar 21, the roll 22 is set so as to have a pitch of 100 mm (wavelength), and the bar 21 is set so that the interference amount (digging amount) becomes 20 mm.
Was fixed to the jig 14. The band 2 has a width of 2 m and a basis weight of 50.
Using a heat-shrinkable fabric of g / m ² , the strip 2 was heat-treated at a temperature of 145 ° C. at a processing speed of 40 m / min to be heat-shrinked. The conveyor uses a stranded wire in the direction in which the cloth is conveyed, so that a large resistance is generated against movement of the cloth in the width direction.

Comparative Example 2 The same experimental conditions as in Example 4 were adopted except that the corrugated material shrinking device used in Example 4 was not provided with the corrugated portion 3. That is, the fabric was placed directly on a conveyor and processed in a flat state without irregularities. Table 3 summarizes the experimental conditions of Example 4 and Comparative Example 2 described above.

[Experimental Results of Example 4 and Comparative Example 2] In order to evaluate the experimental results of Example 4 and Comparative Example 2, the above-mentioned cloth having a width of 2 m was divided into ten equal parts in the width direction, and the same as in the case of Experiment A Then, the shrinkage rate of each part, the average value of the shrinkage rate of each part and the fluctuation rate thereof were determined. The experimental results of Example 4 and Comparative Example 2 are shown in Table 4 and FIG.

[0050]

[Table 3]

[0051]

[Table 4]

From Table 4 and FIG. 15, it can be seen that the shrinkage ratio of Example 4 was higher than that of Comparative Example 2, and that the variation ratio was one third.
It turns out that it is about.

It should be noted that the method for shrinking a belt-like material of the present invention is not limited to the above-described embodiment, and the belt-like material may be partially contacted with the above-mentioned carrier in the width direction before being shrunk. What is necessary is just to form in a wave shape. Further, the band-shaped object contraction device of the present invention is not limited to the above-described embodiment, and the band-shaped object in the width direction is provided on the band-supply side of the energy applying unit to which the band-shaped object is supplied. At least one wavy shape forming part having a wavy shape is provided. In the wavy shape forming part, a plurality of projecting bodies are alternately opposed to each other on both surface sides of the strip and in the width direction of the strip. While providing so as to have a predetermined interval,
What is necessary is just to provide so that the front-end | tip of each protrusion on one side may bite into the inside which connects the front-end | tip of each protrusion provided on the other side.

For example, the contraction energy may be any kind of energy as long as the contraction force is generated in the belt-like material, such as thermal energy applied by contact with a heat drum, infrared rays, etc. May be radiant energy applied by irradiating the electromagnetic wave. Also, the shape of the protruding body can be appropriately changed depending on the degree of contraction and non-uniformity of the strip, and its size, material, and the like can be appropriately changed according to the rigidity, shrinkage rate, and the like of the strip.

[0055]

According to the method and the apparatus for shrinking a belt-like object of the present invention, the contraction rate in the width direction of the belt-like object can be controlled without being affected by the weight of the belt-like material or the magnitude of air permeability. The object can be shrunk uniformly and with high shrinkage.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing an example of a shape formed in a width direction of a strip.

FIG. 2 is a side view showing an embodiment of the band-shaped object shrinking device of the present invention.

FIG. 3 is a front view showing a corrugated portion in the shrinking device of FIG. 2;

FIG. 4 is a front view showing a case where a band-shaped object is passed through the corrugated portion of FIG. 3;

FIG. 5 is a partially enlarged front view showing a state in which protrusions on both sides of the band-shaped material are mutually bitten in the corrugated forming portion of FIG. 3;

FIG. 6 is a view corresponding to FIG. 3 showing a corrugated portion in a second embodiment of the strip-shaped object shrinking device of the present invention.

FIG. 7 is a view corresponding to FIG. 3 showing a corrugated portion in a third embodiment of the band-shaped object shrinking device of the present invention.

FIG. 8 is a perspective view showing a corrugated portion in a fourth embodiment of the band-shaped object shrinking device of the present invention.

FIG. 9A is a front view showing a corrugated portion in a fifth embodiment of the band-shaped object shrinking device according to the present invention, and FIG.
Is a side view.

FIG. 10 is a view corresponding to FIG. 3 showing a corrugated portion in a sixth embodiment of the strip-shaped object shrinking device of the present invention.

FIG. 11 is a view corresponding to FIG. 3 showing a corrugated portion in a seventh embodiment of the band-shaped object shrinking device of the present invention.

FIG. 12 is a view corresponding to FIG. 3 showing a corrugated portion in an eighth embodiment of the band-shaped object shrinking device of the present invention.

FIG. 13 is a view corresponding to FIG. 2, showing still another embodiment (a ninth embodiment) of the strip-shaped object shrinking device of the present invention.

FIG. 14 is a graph showing the experimental results of the shrinkage rate of each of the strips in Examples 1 to 3 and Comparative Example 1 in the width direction.

FIG. 15 is a graph showing the experimental results of the shrinkage rate of each of the strips in the width direction of Example 4 and Comparative Example 2;

16 (a) is a cross-sectional view of the band placed on the conveyor net as viewed from the conveying direction, and FIG. 16 (b) is a thread obtained by tensioning the band shown in FIG. A diagram in which the model is replaced with a model connected by (upper), and a diagram showing a state in which all the contractile objects are contracted in the model (lower),
(C) is a diagram showing a case where the contractible object at each position in the model contracts independently.

FIG. 17 shows a second model in which a contractible object is connected with a slackened thread (FIG. 16B). FIG. 17B is a diagram corresponding to the upper stage (upper stage), and all of the contractible objects in the second model are shown in FIG. FIG. 17B is a view (lower part) corresponding to the lower part of FIG.

[Explanation of symbols]

 a Shrinking device main body a 1 Conveyor (conveyor or lattice) 2 Strip 3 Wave shape forming part 4 Blower 5 Duct 6 Heat exchanger 7 Rectifier with filter 8 Suction box 9 Duct 10 Roller 11 Suction drum 12 Bar 13 Projection (projection) ) 14 Jig b Tip of projecting body 15 Line connecting tip of projecting body 16 Projecting body (U-shaped bar) 17 Projecting body (curved bar) 18 Projecting body (irregular plate) 19 Projecting body (roll) 19 ′ Projecting body (irregularity) 20 Roll 21 Bar 22 Projecting body (Roll) 23 Roll fixing jig 24 Energy applying part 25 Conveyor net 26 Shrinkable object 27 Non-stretchable thread 28 Loose thread 28 'Shrink thread

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁷ , DB name) D06C 21/00 D06C 17/00

Claims (3)

(57) [Claims] 1. A method for shrinking a strip by applying a shrinkage energy to the strip while conveying the strip while conveying the strip while contacting the strip. A method for shrinking a band-like material, wherein the band-like material is formed into a corrugated shape so as to be partially in contact with the carrier in a width direction thereof before contracting. 2. A transporter for transporting the strip while contacting the strip, and an energy applying unit for applying shrinkage energy to the strip being conveyed by the transporter and causing the strip to contract. In the band-shaped material shrinking device, the band-shaped material is supplied at the band-shaped material supply side of the energy applying unit, and the band-shaped material is provided with at least one wave-shaped forming portion that forms a wave-shaped shape in the width direction. In the corrugated portion, a plurality of protrusions are provided on both sides of the strip so as to face each other alternately and have a predetermined interval in the width direction of the strip, and each of the one side has A strip-shaped device for contracting a belt-like object, wherein a tip of a projection is provided so as to bite into a line connecting a tip of each projection provided on the other side. 3. The apparatus according to claim 2, wherein the projecting body is provided so as to be movable in a direction perpendicular to the width direction.