JPH05126467A - Heat treatment device such as drying machine - Google Patents

Abstract

PURPOSE:To carry out a cleaning inside of a heat treatment device by a method wherein a dust removing filter, a heats and an axial flow fan are disposed in an aeration passage extending from an air intake port of a heat treatment chamber to a hot air nozzle and they are constructed such that a rotational direction of the axial flow fan is reversed in its orientation. CONSTITUTION:A width direction of a belt-like item F is set such that a nozzle box 4 having an air blowing port is extended and hot air is supplied from an air trunk 3. A discharging side of the air trunk 3 is directly connected to a central part of the opposite side of a fixing side of the nozzle box 4 and then an axial flow fan 7 is arranged, heaters 8 are arranged at both sides of the fan 7, air heated by the heaters 8 is applied as hot air, blown against the belt-like item F through the nozzle box 4, the amount of air is adjusted by a damper 9, dusts are removed by a filter 10 and then the hot air is circulated. As the axial-flow fan 7 is rotated in a reverse direction, the air is flowed from the nozzle box 4 to the heater 8 and the filter 10, resulting in that the air is discharged by the damper 9 toward an air discharging direction and then adhering dusts can be discharged.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat treatment apparatus such as a dryer for running a web in a heat treatment chamber and injecting hot air from a hot air nozzle in the heat treatment chamber to heat-treat the traveling web. is there.

[0002]

2. Description of the Related Art Conventionally, as a dryer having the above structure,
A ventilation path from the air intake in the drying chamber to the hot air nozzle is equipped with a filter for removing dust, a heater such as a gas burner for heating air, and an axial fan for sending hot air to the hot air nozzle. (For example, Jitsuko Sho 63-33068
issue).

In this dryer, by rotating an axial fan in the forward direction, air is taken from the air inlet, and hot air is jetted from a hot air nozzle to a traveling web through a heater such as a filter and a gas burner. It The jetted hot air flows to the side of the hot air nozzle, flows upward or downward in the drying chamber, and again passes through the heater to be supplied to the hot air nozzle by the axial fan.

[0004]

DISCLOSURE OF THE INVENTION In a heat treatment apparatus such as a dryer having the above structure, when cleaning the inside of the dryer,
In particular, when cleaning the nozzle duct, it was necessary to take out the hot air nozzle from the drying chamber and clean it.

When the nozzle duct is not removed for cleaning, the axial fan is rotated in the opposite direction to remove dust from the filter and the like outside the drying chamber. In this case, in order to reverse the rotation direction of the axial fan, the wiring of the control circuit of the axial fan has been changed. Therefore, every time cleaning is performed, the wiring work is troublesome, a specialized person in charge of the wiring work is required, and when the cleaning work is completed, the normal rotation of the axial fan is not returned to the original and the subsequent There was a problem of doing the work.

[0006]

SUMMARY OF THE INVENTION Therefore, the present invention is to provide a heat treatment apparatus such as a dryer, which can easily clean the inside of the heat treatment apparatus.

[0007]

In a heat treatment apparatus such as a dryer of the present invention, a web is run inside a heat treatment chamber, and hot air is jetted from a hot air nozzle inside the heat treatment chamber to dry the running web. A heat treatment apparatus such as a machine, a filter for removing dust and the like, a heater such as a gas burner for heating air, and the hot air nozzle in the ventilation path from the air intake port in the heat treatment chamber to the hot air nozzle. In a heat treatment apparatus such as a dryer equipped with an axial flow fan that sends hot air, a forward / reverse rotation switching unit that switches the rotation direction of the fan to a control unit of the axial flow fan, and an operating unit that operates the forward / reverse rotation switching unit. It is provided.

[0008]

[Operation] When cleaning the inside of the heat treatment chamber of the heat treatment apparatus such as a dryer having the above-mentioned configuration, the operating means of the forward / reverse switching means for controlling the rotation direction of the axial fan is operated to operate the axial fan. Reverse the direction of rotation.

As a result, the axial fan rotates in the opposite direction, and dust on the filter or the like is discharged to the outside from the air intake port.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

Reference numeral F is a belt-like material to be treated such as cloth.

Reference numeral 1 is an endless holding member such as a pin tenter which is provided in a pair on the left and right, and holds the ears of the belt-like object F to continuously run the belt-like object F.

Reference numeral 2 is a guide rail of the holding member 1.

Reference numeral 3 is an air trunk arranged above and below the strip F.

Reference numeral 4 is a nozzle box which extends in the width direction of the strip F and has an appropriate number of outlets 5 on the surface facing the strip F, and the strip F of the air trunk 3 is provided. A large number of them are arranged side by side in the traveling direction of the belt on the side opposite to the rear surface.

Reference numeral 6 is a hot air supply port from the air trunk 3 to the nozzle box 4.

Reference numeral 7 is an axial fan in which the upper and lower air trunks 3 are arranged so as to be directly connected to the discharge side at the center opposite to the nozzle box mounting side.

Reference numeral 9 is a damper disposed above and below both sides of the machine in order to adjust the total amount of air blown from the upper and lower nozzle boxes 4.

Reference numeral 10 is an air filter.

The axial fan 7 supplies the hot air heated by the heaters 8 arranged on both sides of the fan inside the machine into the air trunk 3 and, through the air trunk 3, the hot air supply port 6 into the nozzle box 4. And is blown out toward the belt-like object F from the blow-out port 5.

The hot air blown from the blow-out port 5 flows to the side of the nozzle box, flows upward or downward on both sides of the inside of the machine, and again passes through the heater 8 and is supplied by the axial fan 7. Therefore, the hot air supply is a circulation system.

As shown in FIG. 4, the control circuit 50 for controlling the fan motor 48 of the axial fan 7 has a direction in which the fan rotates to the side for sending hot air to the nozzle box 4 side (hereinafter referred to as the forward direction). .) On the contrary, and a switch 52 for switching the direction in which the air flows back from the nozzle box 4 to the damper 9 (hereinafter referred to as the reverse direction).

Further, a timer 54 is installed in the control circuit 50 in order to take the rotational inertia of the fan motor 48. That is, the timer 54 suddenly turns on the fan motor 48 when the switch 52 is switched in the reverse direction while the axial fan 7 is rotating in the normal direction.
When is rotated from the normal rotation direction to the reverse rotation direction, an excessive force is applied to the axial fan 7. Therefore, when the switch 52 is switched, the timer 54 operates to measure the time during which the fan motor 48 rotating in the forward rotation direction is stopped, and after the fan motor 48 stops, the fan motor 48 reverses. Rotate in the direction. As a result, no excessive force is applied to the axial fan 7.

In the case of the dryer having the above structure, when cleaning the inside of the dryer, the rotation direction of the axial fan 7 is switched to the reverse direction by the switch 52. Then, the axial fan 7 causes air to flow from the nozzle box 4 to the heater 8,
It flows in the direction of the damper 9 through the air filter 10.
As a result, the dust or the like of the band-shaped material F attached to the air filter 10, the nozzle box 4, the heater 8 and the like is discharged to the outside by the air flow, and the inside of the machine can be cleaned.

In this case, since the rotating direction of the axial fan 7 can be set only by operating the switch 52, it is not necessary to change the wiring to change the rotating direction as in the conventional case, and the cleaning can be performed. After the end, there is no case where the axial flow fan 7 is mistakenly rotated in the reversing direction while keeping the wiring state.

[0026]

According to the heat treatment apparatus such as the dryer having the above-described structure, the axial fan can be operated only by operating the operation means of the forward / reverse switching means for switching the rotation direction of the fan provided in the control means of the axial fan. You can easily reverse the direction of rotation.

As a result, when cleaning the inside of the heat treatment chamber, the rotation direction of the axial fan can be reversed, and dust and the like in the ventilation passage can be eliminated. In this case, there is no need to change the wiring as in the conventional case, so that it does not take much trouble, and after cleaning is completed, the wiring state is left as it is,
Do not accidentally rotate the axial fan in the reverse direction.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a dryer of this embodiment.

FIG. 2 is a vertical sectional view of a part of the dryer.

FIG. 3 is a partially determined perspective view of the dryer of the present invention.

FIG. 4 is a block diagram of a control circuit of an axial fan.

[Explanation of symbols]

 F …… Strip 1 …… Holding member 2 …… Guide rail 3 …… Air trunk 4 …… Nozzle box 5 …… Blowout port 6 …… Hot air supply port 7 …… Axial fan 8 …… Heater 9 …… Damper 10 ... Air filter

Claims (1)

[Claims] 1. A dryer for drying a running web by running a web inside the heat treatment chamber and injecting hot air from a hot air nozzle inside the heat treatment chamber, the hot air nozzle extending from an air intake port in the heat treatment chamber. In a heat treatment device such as a drier having a filter for removing dust, a heater such as a gas burner that heats air, and an axial fan that sends hot air to the hot air nozzle, A heat treatment apparatus such as a dryer, characterized in that the control means of the flow fan is provided with a forward / reverse rotation switching means for switching the rotation direction of the fan and an operating means for operating the forward / reverse rotation switching means.