JPH0470547B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to an apparatus for drying or heat-treating fabrics such as woven and knitted fabrics.

[Prior art and its problems] A long piece of fabric is interposed between upper and lower conveyor nets, the fabric is run together with the conveyor net, and hot air is injected from nozzles placed oppositely across these conveyor nets. 2. Description of the Related Art Devices for drying or heat treating fabrics are known.

Some such devices have nozzles arranged in a staggered manner above and below the conveyor net. In this device, hot air is alternately sprayed from above and below in the traveling direction of the traveling fabric, so that the fabric 8 moves while making a wave-like movement as shown by arrow B in FIG. This is intended to dry the fabric while loosening it, thereby giving the fabric a shrinking effect and a relaxing effect.

However, in conventional devices, hot air is always sprayed onto the fabric at a constant strength, so the fabric only moves in a gentle meandering motion up and down, even though the fabric has been thoroughly massaged. do not have.

Further, in such a device, a large number of elongated nozzles are arranged in parallel perpendicularly to the running direction of the fabric, and each nozzle has an injection port extending in the longitudinal direction of the nozzle on the side facing the fabric. The jet width of the hot air is determined by the length of the jet nozzle, so if the length of the jet nozzle is made to match the width of the fabric, all of the jetted hot air will hit the cloth and the hot air can be used without wasting it.

However, the above device has to process fabrics of various widths, but conventional nozzles cannot freely change the length of the injection port according to the width of the fabric, so it is necessary to process fabrics of the maximum width to be processed. The injection port was formed to match. Therefore, when processing a fabric with a width narrower than this, not only will hot air blow out in excess of the required amount, resulting in an economic loss, but the excess hot air will flow back and forth and left and right over the fabric surface, causing ,
The fabric flows horizontally or meanderes.

An object of the present invention is to provide a drying or heat treatment device that has a nozzle that sprays hot air so as to massage the fabric sufficiently and can change the spray width depending on the width of the fabric.

[Means for Solving the Problems] The drying or heat treatment apparatus of the present invention has a means for running a long piece of fabric, and a nozzle for spraying hot air onto the fabric, and the nozzle has an inner and outer side. Consisting of triple cylinders, two of these cylinders both have axial slits on their circumferential surfaces, one of which is fixed, the other rotates continuously, and the other cylinder rotates by a desired angle. It is characterized in that it has an opening on the circumferential surface, and the width of the opening in the axial direction changes along the circumferential direction.

[Operation] When one of the two cylinders with slits among the triple cylinders of the nozzle rotates and the slits of both cylinders match, the hot air supplied to the inside of the inner cylinder is blown out to the outside. , when both slits do not match, the jet is blocked. As a result, hot air is ejected intermittently from the nozzle, and as shown by arrow A in FIG. 10, vertical impacts are repeatedly applied to arbitrary points on the fabric. Since the fabric as a whole advances in the direction of the arrow B while doing this, the fabric can be sufficiently kneaded and loosened.

In addition, since the axial width of the opening provided in the other cylinder of the nozzle changes along the circumferential direction, by rotating the cylinder with this opening, the jet width of the hot air can be changed. be able to.

[Example] FIGS. 1 and 2 show an example of the drying apparatus of the present invention.

Inside the drying device, there is a hot air circulation path 6 and a drying chamber 2.
are divided into upper and lower parts by partition walls,
A heater 73 is provided approximately in the center of the hot air circulation path 6, and a fan 74 is provided on one side, and a supply chamber 7 extends downward from the fan 74 to supply hot air to the drying chamber 2. The hot air supplied to the drying chamber 2 is discharged upward, passes through a filter 72 arranged on the partition wall, and enters the circulation path 6.
Return to

Inside the drying chamber 2, there is a nozzle 3 that sprays hot air.
A large number of nozzle rows are arranged in parallel in the horizontal direction perpendicular to the running direction of the fabric 8, and are arranged one above the other with a certain distance between them.

An upper and lower two-layer conveyor net 4, 5 runs between vertically adjacent nozzle rows. As shown by arrows 18 and 29, the conveyor nets 4 and 5 circulate inside and outside the drying chamber 2 along separate routes while being changed in direction by direction change rolls 9 to 17 and 20 to 28, respectively. do.

A long fabric 8, such as a woven or knitted fabric, enters the drying chamber 2 from above one end in the longitudinal direction of the drying chamber 2, is located between the conveyor nets 4 and 5, and runs together with these conveyor nets. Then, it exits from the lower part of the other end of the drying chamber 2. When the fabric 8 travels in the drying chamber 2, hot air is sprayed onto the fabric 8 from the upper nozzle 3, and the fabric 8 moves in a floating state.

3 to 8 show the nozzle 3 used in the drying apparatus shown in FIGS. 1 and 2. FIG.

36 is an outer cylinder, the left end of which is closed by a disk 62 in FIG. 3, and the right end is open.
A shaft 37 passes through the disc 62 via a bearing 63 so as to be relatively rotatable. The right end of the outer cylinder 36 is the partition wall 3
It is slidably and rotatably fitted to the outer peripheral surface of a cylindrical convex wall 39 arranged at 8. In this way, the outer cylinder 36
are rotatably engaged with the shaft 37 and the convex wall 39 at both left and right ends thereof, respectively. A pulley 64 is provided outside the bearing 63, and by moving this pulley 64 via a belt (not shown), the outer cylinder 36 rotates relative to the shaft 37.

Two diametrically opposed openings 65 and 66 are provided on the circumferential surface of the outer cylinder 36. opening 65,
66 is the same trapezoid, and both the upper and lower bases 6 of the trapezoid are
7 and 68 are located in the axial direction of the outer cylinder 36.
These two trapezoids are arranged such that the lower base 68 of the other trapezoid is located adjacent to the upper base 67 of one, as shown in FIG. Portions of the two openings 65 and 66 having the same width in the axial direction are opposed to each other in the diametrical direction. The lower base 68 of the trapezoid corresponds to the maximum width of the fabric to be processed;
The upper base 67 corresponds to its minimum width, and the axial widths of the openings 65, 66 gradually change between the two.

35 is a cylindrical intermediate cylinder housed inside the outer cylinder 36. This is done by arranging two semi-cylindrical circumferential plates 51 to face each other so that an axial slit 55 exists between them above and below, and fixing the right end in FIG. 3 to the inner periphery of the convex wall 39. The free ends are connected by a disk 53. A shaft 37 rotatably passes through the disk 53 via a bearing 54 . In the slit 55, fins 57 extend inward from the side edge of the peripheral plate 51. In order to concentrate the hot air in the diametrical direction, the two fins 57 in the slit 55 are arranged opposite to each other.

34 is a cylindrical inner cylinder housed inside the intermediate cylinder 35, which has two semi-cylindrical peripheral plates 41 facing each other so that an axial slit 45 exists between them. , one longitudinal end thereof is connected by a disk 43, and the other end thereof is connected by a diametrically thin plate 44. A shaft 37 passes through the disk 43 and the thin plate 44 and is fixed thereto, and both ends of the shaft 37 are rotatably supported by the frame of the drying device via bearings 49. The inner cylinder 34 is rotatable with respect to the intermediate cylinder 35 and the outer cylinder 36. In the slit 45 of the inner cylinder 34, the fin 4 is inserted from the side edge of the circumferential plate 41.
7 extends diametrically inward.

The inner cylinder 34 is driven by a fifth drive means (not shown).
It rotates continuously in one direction, as shown by solid arrows in the figures and FIG. Hot air is supplied into the inner cylinder 34 from the right side of the partition wall 38 in FIG. As shown in FIG. 5, if the slit 45 of the inner cylinder 34 and the slit 55 of the intermediate cylinder 35 match, the hot air will be ejected upward and downward through the openings 65 and 66 of the outer cylinder 36. When the inner cylinder 34 rotates and the slit 45 of the inner cylinder 34 and the slit 55 of the intermediate cylinder 35 no longer match each other as shown in FIG. 6, the jetting of hot air is interrupted. When the inner cylinder 34 rotates further and the slits 45, 55 of both cylinders 34, 35 meet again, hot air is ejected again.

As described above, the continuous rotation of the inner cylinder 34 causes the hot air to be ejected intermittently, and since such hot air hits the fabric 8, the fabric 8 receives repeated impacts and is sufficiently kneaded (10th (see figure).
By adjusting the rotational speed of the inner cylinder 34, the number of jets of hot air can be controlled, and the kneading effect given to the fabric 8 can be adjusted.

In FIG. 3, the inner cylinder 34 is viewed from the right side of the partition wall 38.
The hot air supplied to the inside of the
The liquid passes through the slit 45 of the inner cylinder 34, the slit 55 of the intermediate cylinder 35, and the openings 65, 66 of the outer cylinder 36, respectively, and is injected to the outside. As shown in FIG.
5 (see the area marked with many dots), when the outer cylinder 36 is rotated with respect to the intermediate cylinder 35, as shown by the dotted arrow in FIGS. , this area changes and the injection width changes. For example, when the outer cylinder 36 is rotated clockwise when viewed from the left side of FIG. 4, the injection width becomes wider, and when the outer cylinder 36 is rotated counterclockwise, the injection width becomes narrower. In this way, the jetting width can be adjusted according to the width of the fabric 8.

Note that since the axial widths of the openings 65 and 66 that are diametrically opposed are the same, the upper and lower injection widths are the same.

The outer cylinder 36 may be rotated manually or by using a drive source such as a motor.

The nozzle 3 is provided perpendicularly to the running direction of the fabric 8, and the hot air supplied from the supply chamber 7 into the inner tube 34 is passed through the openings 65, 66 of the outer tube 36.
It is intermittently sprayed towards the traveling fabric 8.
Further, as shown in FIG. 1, the nozzle 3
Since the fabrics 8 are arranged in a staggered manner above and below, the fabrics 8 form a waveform at the moment the hot air is jetted.

The hot air injected onto the fabric 8 rises, passes through the filter 72 , is reheated by the heater 73 , and is again supplied into the inner cylinder 34 by the circulation fan 74 .

In the nozzle 3 of the drying device 1 of this embodiment,
Openings 65 and 66 are provided in the outer cylinder 36, and the intermediate cylinder 35
and the inner cylinder 34 have slits 55 and 45, respectively.
The intermediate cylinder 35 is fixed and the outer cylinder 36 and the inner cylinder 34 are rotated separately.
6 may be provided, or either the outer cylinder 36 or the inner cylinder 34 may be fixed. However, in any case, a slit must be provided in the fixed tube, and the slit must be placed in such a position that the hot air blows out perpendicularly to the fabric.

In the drying apparatus 1 shown in FIGS. 1 and 2, the slits in the fixed cylinder must be provided above and below for the nozzles belonging to the second to fifth stages, but the nozzles in the top stage direct the hot air downward. Since the nozzle at the lowest stage only needs to inject upward, one slit and one opening may be provided accordingly.

Furthermore, by changing the number of slits provided in the continuously rotating cylinder, it is possible to change the injection frequency of hot air.

In this embodiment, the friction between the belt and the pulley 64 is used to rotate the outer cylinder 36 in the circumferential direction and keep it at a desired position. However, the present invention is not limited to this, and the outer cylinder 36 It is also possible to use other means for temporarily fixing at any position in the circumferential direction.

Note that it is also possible to use the drying apparatus 1 of this embodiment for heat treatment.

[Effects of the invention] When either one of the two cylinders having slits among the nozzle cylinders rotates, the jet of hot air from the nozzle becomes intermittent, and the hot air hits the fabric intermittently, so that the fabric is thoroughly kneaded and loosened. As a result, the shrinkage effect and relaxation effect imparted to the fabric are increased, and the fabric has excellent shrink-proofing and texture processing.

In addition, the jet width of hot air can be changed by rotating the tube with the nozzle opening, so it is economical because only the necessary amount of hot air can be used depending on the width of the fabric. It is also possible to prevent the fabric from flowing sideways or meandering.

[Brief explanation of the drawing]

FIG. 1 is a schematic front view showing a drying device according to an embodiment of the present invention, FIG. 2 is a sectional view taken along the - line in FIG. 1, and FIGS. 3 to 8 are nozzles used in the drying device. Fig. 3 is a vertical sectional view,
The figure is a perspective view with the disc at the end omitted, and FIG.
Figure 3 is a cross-sectional view taken along the - line, Figure 6 is a cross-sectional view showing a state in which hot air is blocked, Figure 7 is a schematic plan view of the main part, and Figure 8 is an external view with the disc at the end omitted. FIG. 9 is a perspective view of the cylinder, and FIG. 9 is a schematic diagram showing the progress of the fabric of the conventional example. FIG. 10 is a schematic diagram showing the progress of the fabric of the present invention. Explanation of symbols, 3... Nozzle, 8... Fabric, 34
... Inner cylinder, 35 ... Intermediate cylinder, 36 ... Outer cylinder, 45
...Slit in a continuously rotating cylinder, 55...Slit in a fixed cylinder, 65, 66...Opening.

Claims (1)

[Claims] 1. In a drying or heat treatment device having means for running a long fabric and a nozzle for spraying hot air onto the fabric, the nozzle is composed of three inner and outer tubes, and two of these tubes both have a circumferential surface. One of the cylinders is fixed, the other rotates continuously, and the other cylinder is rotatable by a desired angle and has an opening on its circumferential surface, with an axial slit in the opening. A drying or heat treatment device characterized in that the width varies along the circumferential direction.