JPH09317694A - Blast nozzle device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a blast nozzle device capable of vertically spraying hot air against a surface of a web from a nozzle hole, having simple structure and easy to maintain. SOLUTION: It is constituted of a blast chamber 1 furnished with a blast fan 5 inside, a blast port 2 and a blast duct 3. The blast duct 3 is constituted of a second upper wall 8 extending from an upper wall 6 of the blast port 2, a second bottom wall 9 extending from a bottom wall 7 of the blast port 2 and connected to the second upper wall 8 and a second side wall respectively extending from a side wall of the blast port 2 and connected to the second upper wall 8 and the bottom wall 9. The second bottom wall 9 has a region extending in parallel with the upper wall of the blast port 2, partially bends at this region and forms a large number of recessed parts 10. The recessed parts 10 have an inclined and flat wall part extending by making a sharp angle αagainst a flat surface surrounded by an opening edge toward the inside of the blast duct 3 backward from a front end side region of their opening edge, and a nozzle hole 13 is formed on this wall part.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a blower nozzle device which is used by attaching hot air to a web such as a cloth or a film conveyed in a heat treatment chamber and performing heat treatment on the web. Is.

[0002]

2. Description of the Related Art In a conventional heat treatment apparatus of this type,
A heat treatment chamber is provided, a web transport path is provided in the heat treatment chamber, and blower nozzle devices are disposed inside the heat treatment chamber and above and below the transport path. And
The web is heat-treated by being conveyed along the conveying path in the heat treatment chamber and being blown with hot air from the blower nozzle device.

As shown in FIG. 7, a blower nozzle device used in this heat treatment apparatus has a blower chamber 30, a blower port 31 connected to the blower chamber 30, and a blower duct 32 connected to the blower port 31. have. The blower chamber 30 has a cylindrical shape with both ends closed, a notch 33 of a predetermined width extending over the entire length is formed on the side wall thereof, and a blower fan 34 is coaxially arranged inside. The blower port 31 includes a first upper wall 35 extending from one side edge of the notch 33 over the entire length of the notch in a tangential direction of a circumference of both end faces, and the notch 33.
A first bottom wall 36 extending in parallel to the first upper wall 35 from the other side edge of the notch, and extending from both end edges of the notch 33, respectively, the first upper wall 35 and the first bottom. A first side wall connecting to the wall 36.

The blower duct 32 is the first upper wall 3 of the blower port.
Second upper wall 37 extending downward from the tip edge of 5
A second bottom wall 38 connected to the leading edge of the second upper wall 37 and the leading edge of the first bottom wall 36 of the blower opening, and extending from the leading edge of the side wall of the blower opening to the second top And a side wall connecting to the wall 37 and the second bottom wall 38. The second bottom wall 38 also extends at a right angle to the first bottom wall 36.
Portion 38a, a second portion 38b extending from the first portion 38a in parallel with the first upper wall 35 of the air outlet 31, and a second portion 38b.
The third extending from the portion 38b of the
Part 38c. Further, a large number of ejection ports 3 are provided in the second portion 38b of the second bottom wall 38 of the air duct.
9 are spaced apart from one another and are appropriately arranged.

This blower nozzle device is provided with a blower duct 32.
Extends along the width direction of the conveyed web, and the second
The second portion 38b of the bottom wall 38 of the is arranged parallel to the surface of the web. Then, the high temperature air supplied to the blower chamber 30 is blown by the blower fan 34 through the blower port 31 and the blower duct 32, and hot air is blown out from the ejection port 19. In this case, the hot air is blown obliquely downward from the ejection port 19 toward the tip of the apparatus and obliquely with respect to the surface of the conveyed web. However, when the conveyed web receives the hot air in the oblique direction, it may meander, and since the hot air blown in the oblique direction cannot uniformly heat the web, it adversely affects the heat treatment effect. .

[0006] Therefore, in order to blow out the hot air from the ejection port 19 directly below and perpendicularly to the surface of the web, as shown in FIG. 8, inside the blower duct 32 and at the bottom wall 38 thereof. 2. Description of the Related Art A blower nozzle device in which a large number of the same vertical plates 40 are arranged parallel to each other at regular intervals in the lengthwise direction of a blower duct is conventionally known. Note that, in FIG. 8, the same components as those in FIG. 7 are denoted by the same reference numerals, and description thereof will be omitted. However, according to this configuration, when dust or the like is clogged in the gap between the vertical plates 40, the blower nozzle device has to be disassembled, maintenance of the device is troublesome, and the structure is complicated. However, it has the drawback of high manufacturing costs.

[0007]

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a blower nozzle device having a simple structure and capable of blowing hot air perpendicularly to the surface of a web from a jet outlet and having easy maintenance. Especially.

[0008]

In order to solve the above-mentioned problems, according to the present invention, an air flow generated by a blower fan arranged in a blower chamber is blown from a blower port provided in the blower chamber. A blower nozzle device configured to be supplied to a blower duct connected to a mouth so as to be ejected from a blowout port provided in the blower duct, wherein the blower chamber is
It has a cylindrical shape with both ends closed, a blower fan is arranged coaxially inside, and a side wall is formed with a notch of a predetermined width extending over the entire length, and the blower port is provided with one side edge of the notch. From the entire length of the cutout, from the first upper wall extending in the tangential direction of the circumference of the end faces of the blower chamber, and from the other side edge of the cutout, over the entire length of the cutout,
A first bottom wall extending parallel to the first upper wall, and first sidewalls extending from both end edges of the notch and connected to the first upper wall and the first bottom wall, respectively. Cage,
The air duct is connected to a second upper wall extending forward from the leading edge of the first upper wall and to a leading edge of the second upper wall extending forward from the leading edge of the first bottom wall. A second bottom wall and a front edge of each of the first sidewalls.
The second bottom wall of the blower duct is formed parallel to the first top wall of the blower opening, the second bottom wall of the blower duct being formed of a second side wall connected to the second top wall and the second bottom wall. Has a region that extends to form a large number of recesses or protrusions that are partially bent in this region, and the recesses are rearward from the region on the tip end side of the opening edge, toward the inside of the blower duct. , Having an inclined wall portion extending at a constant acute angle with respect to a plane surrounded by the opening edge, and the convex portion is
From the rear end side region of the peripheral edge, toward the outside of the blower duct, there is an inclined wall portion that extends at a constant acute angle with respect to the plane surrounded by the peripheral edge, and the concave portion or The blower nozzle device is characterized in that the jet port is formed in the inclined wall portion of the convex portion.

In such a structure, the ejection port formed in the inclined wall portion of the concave portion or the convex portion of the blower duct may have any shape, but it may be circular, quadrangular, oval or the length of the blower duct. It is preferable to have a shape of a slit extending in the direction. Also, preferably,
The inclined wall portion of the recess extends rearward from the tip end side region of the opening edge of the recess toward the inside of the air duct at an angle of 5 ° to 20 ° with respect to the plane surrounded by the opening edge, The slanted wall portion of the convex portion forms an angle of 5 ° to 20 ° with respect to the plane surrounded by the peripheral portion, from the rear end side region of the convex portion toward the front toward the outside of the air duct. It is growing.

[0010]

Preferred embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a vertical sectional view of an embodiment of the present invention. As shown in FIG. 1, the blower nozzle device according to the present invention includes a blower chamber 1, a blower port 2 connected to the blower chamber 1, and a blower duct 3 connected to the blower port 2.

The blower chamber 1 has a cylindrical shape with both ends closed, a notch 4 of a predetermined width extending over the entire length is formed in the side wall, and a blower fan 5 is coaxially arranged inside. Although not shown, the blower chamber 1 is provided with a hot air supply port. The blower port 2 is formed from one side edge of the cutout 4,
A first upper wall 6 extending in the tangential direction of the circumference of both end faces over the entire length of the notch, and a first upper wall 6 extending from the other side edge of the notch 4 in parallel with the first upper wall 6 over the entire length of the notch. The bottom wall 7 and the notches 4 extend from both end edges of the notch 4, respectively, and the first upper wall 6
And a vertical first side wall connecting to the first bottom wall 7.

The blower duct 3 includes a second upper wall 8 extending downward from the tip edge of the first upper wall 6 and a second upper wall 8 extending from the tip edge of the first bottom wall 7. A second bottom wall 9 connected to the leading edge and extending from the leading edge of the first side wall,
It comprises a second side wall connecting the second top wall 8 and the second bottom wall 9.

In this embodiment, the second bottom wall 9 of the blower duct 3 has a first portion 9a extending downward at right angles from the front edge of the first bottom wall 7 of the blower opening 2, and a first portion 9a. A second portion 9b extending parallel to the first upper wall 6 of the air outlet 2 from
The second side wall of the blower duct 3 has a trapezoidal shape, and is composed of a third portion 9c extending upward from the second portion 9b at a right angle to the tip edge of the second upper wall 8. There is.

The second bottom wall 9 is partially bent at the second portion 9b to form a large number of recesses 10.
FIG. 2 is a plan view of the embodiment of FIG. 1 viewed from the bottom side.
As shown in FIG. 2, in this embodiment, the recesses 10 are arranged in two rows along the length direction of the blower duct 3, and
The recesses belonging to one row and the recesses belonging to the other row are arranged so as not to overlap in the width direction of the blower duct 3. The arrangement of the recesses is not limited to this.

As shown in FIGS. 1 and 2, each recess 1
0 has a circular opening, and an angle of α = 5 ° to 20 ° with respect to a plane surrounded by the opening edge from the tip end side position of the opening edge toward the inside of the air duct 3. It consists of a sloping flat circular wall part 11 and a wall part 12 with a tapered conical surface which extends from the remaining area of the opening edge of the recess to the periphery of this wall part 11.
The inclined flat circular wall portion 11 is formed with a jet port 13 having a circular shape, an elliptical shape, a square shape, or a slit shape extending in the length direction of the blower duct 3. The ejection port 13 may have a shape other than these.

The blower nozzle device according to the present invention is used by being attached to a heat treatment device for heat treating a web such as a cloth or a film. The heat treatment apparatus includes a heat treatment chamber, and a web conveyance path is provided in the heat treatment chamber. Then, inside the heat treatment chamber, above and below the transport path, the air blowing nozzle device according to the present invention is arranged.

In the blowing nozzle device, the blowing duct 3 extends along the width direction of the web to be conveyed and the second bottom wall 9 is provided.
Second part 9b of the is arranged parallel to the surface of the web. Then, the web is conveyed in the heat treatment chamber along the conveyance path, and the high temperature air supplied from the hot air supply port to the blower chamber 1 is sent by the blower fan 5 through the blower port 2 and the blower duct 3 to blow out the jet port. Hot air is blown against the web from 13.

In this case, the hot air is blown from the jet nozzle 13 perpendicularly to the surface of the web. Therefore, it is possible to prevent meandering during the conveyance of the web, and it is possible to uniformly heat the entire surface of the web. As a result, the heat treatment of the web can be efficiently performed.
Moreover, according to the present invention, since the blower nozzle device has a simple structure, maintenance can be easily performed.

FIG. 3 is a plan view similar to FIG. 2, showing another example of the recess. In the example shown in FIG. 3, each recess 14 is
It has a square opening and one set of opposite sides is the second side of the second bottom wall.
Are arranged so as to be parallel to the side edges of the portion 9b.
The concave portion 14 is an inclined flat surface that extends rearward from the opening edge on the tip side toward the inside of the air duct 3 and forms an angle of α = 5 ° to 20 ° with respect to the plane surrounded by the opening edge. A trapezoidal wall portion 15, a second flat trapezoidal wall portion 16 extending obliquely from the leading edge of the wall portion 15 to the opening edge on the rear end side at a right angle to the wall portion 15, the opening side edge and 2
It is formed from a sloping flat right-angled triangular wall portion 17 connecting to the side edges of two trapezoidal wall portions 15, 16. The inclined flat trapezoidal wall portion 15 is formed with a jet port 18 having a circular shape, an elliptical shape, a quadrangular shape, or a slit shape extending in the length direction of the blower duct 3. It goes without saying that the same effect as in the case of FIG. 2 can be obtained in the case of this example as well.

FIG. 4 is a vertical sectional view showing a modification of the embodiment shown in FIG. This embodiment is different from the embodiment of FIG. 1 only in the upper structure of the air duct. Therefore, in FIG. 4, the same components as those in FIG. According to the embodiment of FIG. 4, the second upper wall 8 ′ of the blower duct 3 ′ extends in the plane formed by the first upper wall 6 of the blower opening 2 and the blower duct 3 ′ is
It has a substantially rectangular parallelepiped internal space. Also in the case of this modification, the same effect as in the case of the embodiment of FIG. 1 can be obtained.

FIG. 5 is a vertical sectional view of another embodiment of the present invention. In the embodiment of FIG. 5, the second bottom wall 9 of the blower duct 3 is used.
However, only the difference from the embodiment of FIG. 1 is that the second portion 9b is partially bent to form a large number of convex portions. Therefore, in FIG. 3, the same components as those in FIG. 1 are designated by the same reference numerals and the description thereof will be omitted.

In the embodiment of FIG. 5, the convex portion 19 has a circular peripheral edge, and from the rear end side position of the peripheral edge,
The inclined flat circular wall portion 20 extending forwardly toward the outside of the blower duct 3 at an angle of α = 5 ° to 20 ° with respect to the plane surrounded by the peripheral edge and the peripheral edge of the convex portion 19. And a wall portion 21 having a tapered conical surface extending from the remaining region to the periphery of the circular wall portion 20.
Then, in the inclined flat circular wall portion 20, for example,
An ejection port 22 having a circular shape, an elliptical shape, a square shape, or a slit shape extending in the length direction of the blower duct 3 is formed. Also in the case of this embodiment, the same effect as in the case of the embodiment of FIG. 1 can be obtained.

FIG. 6 is a vertical sectional view showing a modification of the embodiment shown in FIG. This embodiment is different from the embodiment of FIG. 5 only in the upper structure of the air duct. Therefore, in FIG. 6, the same components as those in FIG. According to the embodiment of FIG. 6, the second upper wall 8 ′ of the blower duct 3 ′ extends into the plane formed by the first upper wall 6 of the blower opening 2 and the blower duct 3 ′.
Has a substantially rectangular parallelepiped internal space. Also in the case of this modification, the same effect as in the case of the embodiment of FIG. 1 can be obtained.

Although the preferred embodiments of the present invention have been described above, the configuration of the present invention is not limited to these embodiments. For example, the shape of the concave portion or the convex portion is not limited to that of the embodiment, and the concave portion is rearward from the tip end side region of the opening edge, toward the inside of the blower duct,
It has an inclined flat wall portion extending at a constant acute angle with respect to the plane surrounded by the opening edge, and the convex portion is forward from the rear end side region of the peripheral edge thereof, toward the outside of the blower duct, It has an inclined flat wall portion that extends at a certain acute angle with respect to the plane surrounded by the peripheral edge, so that the ejection port is formed in each inclined flat wall portion of the concave portion and the convex portion. Any shape may be used as long as it is. Further, the second portion of the second bottom wall may be formed by mixing the concave portion and the convex portion.

[0025]

As described above, according to the present invention, in the heat treatment apparatus for the web, the hot air can be blown perpendicularly to the surface of the web, so that the meandering during the conveyance of the web can be prevented. Also, the entire surface of the web can be heated uniformly. As a result, the heat treatment of the web can be performed very efficiently. Moreover, according to the present invention, the blow nozzle device has a simple structure, can be manufactured at low cost, and maintenance of the device can be easily performed.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of an embodiment of the present invention.

FIG. 2 is a plan view of the embodiment of FIG. 1 viewed from the bottom side.

FIG. 3 is a plan view similar to FIG. 2, showing another configuration of the concave portion of FIG. 1.

FIG. 4 is a vertical sectional view showing a modified example of the embodiment of FIG.

FIG. 5 is a vertical sectional view of another embodiment of the present invention.

6 is a vertical cross-sectional view showing a modified example of the embodiment of FIG.

FIG. 7 is a longitudinal sectional view showing a conventional example.

FIG. 8 is a vertical cross-sectional view showing another conventional example.

[Explanation of symbols]

 1 Blower Chamber 2 Blower Port 3 Blower Duct 4 Notch 5 Blower Fan 6 First Upper Wall 7 First Bottom Wall 8 Second Upper Wall 9 Second Bottom Wall 10, 14 Recessed 11, 15 Sloped Flat Wall Portions 13 and 18 Jet outlet 19 Convex portion 20 Sloping flat wall portion 22 Jet outlet

Claims (1)

[Claims] 1. An air flow generated by a blower fan disposed in a blower chamber is supplied from a blower port provided in the blower chamber to a blower duct connected to the blower port, and provided in the blower duct. A blower nozzle device adapted to blow out from a jet outlet, wherein the blower chamber has a cylindrical shape with both ends closed, a blower fan is coaxially arranged inside, and a predetermined length of the side wall extends over the entire length. A width cutout is formed, the blower opening extends from one side edge of the cutout over the entire length of the cutout, and a first upper wall extending in a tangential direction of a circumference of both end surfaces of the blower chamber, From the other side edge of the notch, over the entire length of the notch, a first bottom wall extending in parallel to the first upper wall, and extending from both end edges of the notch,
It is formed of a first side wall that is connected to the first upper wall and the first bottom wall, and the blower duct is a second upper wall that extends forward from a tip edge of the first upper wall. A second bottom wall connected to a front edge of the first bottom wall and connected to a front edge of the second upper wall, and a front edge of the first side wall, respectively.
The second bottom wall of the blower duct is parallel to the first top wall of the blower port, and is formed from a second side wall connecting to the second top wall and the second bottom wall. Has a region extending to, and in this region is partially bent to form a large number of recesses or protrusions,
The concave portion has a sloping flat wall portion that extends rearward from the tip end side region of the opening edge toward the inside of the air duct and forms a constant acute angle with respect to a plane surrounded by the opening edge. However, the convex portion is an inclined flat wall portion that extends forward from the rear end side region of the peripheral edge toward the outside of the air duct and forms a constant acute angle with respect to the plane surrounded by the peripheral edge. And a jet nozzle is formed in each of the inclined flat wall portions of the concave portion and the convex portion.