JPH06335655A - Heat treating furnace - Google Patents

Abstract

PURPOSE:To allow the startup time of a heat treating furnace to be shortened without articles having large heat capacity, such as a floor conveyor being heated until the temp. of a drying furnace reaches the prescribed one from the startup of the drying furnace since the floor conveyor for conveying trucks is laid in the furnace body and to convey heat treated materials without the temp. in the furnace being lowered when the trucks of room temp. are successively conveyed in during the operation of the drying furnace. CONSTITUTION:In a heat treating furnace where materials to be treated W are conveyed into a furnace body 2, mounted on trucks 5 of a floor conveyor 4, the floor conveyor 4 for conveying the materials to be treated W is laid along below floor level of the furnace body 2, and a supporter 6 for supporting the materials to be treated W in the furnace body 2 is erected on the central part side of the trucks 5 transferred below floor level by the floor conveyor 4, and also a slit 9 through which the supporter 6 is passed is formed in a floor wall 8 of the furnace body 2 along a track of the trucks.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat treatment furnace in which an object to be processed is placed on a carriage of a floor conveyor and conveyed in a furnace body.

[0002]

2. Description of the Related Art In a coating line for automobile bodies, etc., the vehicle body to be coated is placed on a trolley of a floor conveyor, carried into a coating booth that is air-conditioned at a predetermined temperature and humidity, and then coated. After the completion, the object to be coated together with the trolley is carried into a high-temperature drying oven to bake and dry the coating film. In this way, by transferring the dolly on which the object to be processed is transferred from the coating booth to the drying furnace, it is possible to form the coating film while transporting the object on the floor conveyor without the trouble of transferring the object to be processed on the way.

[0003]

However, since the floor conveyor that conveys the carriage is laid inside the furnace body, until the temperature of the drying furnace reaches a predetermined temperature after the operation of the drying furnace is started. It takes a long time to start up because it needs to heat things with a large heat capacity such as a floor conveyor, and during operation of the drying furnace, trolleys at room temperature are carried in one after another to lower the temperature inside the furnace, resulting in large heat loss. However, there is a problem that running costs increase. Therefore, the present invention is technically capable of starting the heat treatment furnace without heating the floor conveyor, and being able to convey the object to be processed without heating the carriage during the operation of the drying furnace. It is an issue.

[0004]

In order to solve this problem, the present invention conveys an object to be treated in a heat treatment furnace in which the object to be treated is placed on a carriage of a floor conveyor and conveyed in the furnace body. A floor conveyor is laid along the underfloor of the furnace main body, on the side of the center of the trolley that is transported under the floor by the floor conveyor, a pillar for supporting the object to be processed in the furnace main body is erected, and the furnace main body The floor wall is characterized in that slits for passing the pillars are formed along the track of the carriage.

[0005]

According to the present invention, the floor conveyor for conveying the object to be processed is laid along the underfloor of the furnace body, and the carriage is transported under the floor by the floor conveyor, and the floor conveyor is laid inside the furnace body. Moreover, since the carriage is not transferred, the floor conveyor and the carriage are not heated by the heat treatment furnace, and therefore the heat loss is also minimized. In addition, a pillar for supporting the object to be processed in the furnace main body is erected on the center side of the truck, and a slit for passing the pillar is formed in the floor wall of the furnace main body along the track of the truck. Therefore, the object to be processed is supported by the pillars, transferred in the furnace body, and subjected to the heat treatment as in the conventional case.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be specifically described below based on the embodiments shown in the drawings. FIG. 1 is a front view showing an example of a heat treatment furnace according to the present invention.

In FIG. 1, reference numeral 1 designates heat ducts 3 arranged on both left and right sides in a furnace main body 2 in which a ceiling wall, left and right side walls, and an underfloor wall are made of a heat insulating material, and an object to be treated W is placed on a floor conveyor 4.
Is a heat treatment furnace which is placed on a carriage 5 of the furnace and conveyed in the furnace body 2. The floor conveyor 4 is laid under the floor of the furnace body 2, and
Are transported under the floor.

A pillar 6 for supporting the object W to be processed in the furnace main body 2 is erected on the central portion of the carriage 5, and the left and right ends of the object W to be processed are provided above the pillar 6. An attachment 7 for supporting the is attached. Then, on the floor wall 8 of the furnace main body 2, slits 9 for passing the pillars 6 are formed along the track of the carriage 5, and the carriage 5 on which the workpiece W is placed on the attachment 7 is transferred by the floor conveyor 4. At this time, the support column 6 is passed through the slit 9 so that the workpiece W placed on the attachment 7 is transferred in the furnace body 2.

The above is an example of the configuration of the present invention, and its operation will be described below. First, the heat treatment furnace 1 is started up by passing hot air through the heat duct 3 to raise the inside of the furnace body 2 to a predetermined heat treatment temperature. Since there is no floor conveyor 4 in the furnace body 2 and the dolly 5 is also transported under the floor, there is little heat loss, and only by heating the furnace body 2, a predetermined heat treatment temperature can be achieved. Reach

Next, when heat treatment is started and the carriage 5 on which the workpiece W is placed is transferred, the pillar 6 standing on the carriage 5 is inserted into the slit 9 and the workpiece located above the pillar 6 is processed. Only W and the attachment 7 are transferred inside the furnace body 2, and the carriage 5 is transferred under the floor by the floor conveyor 4 laid under the floor.

Therefore, during the operation of the heat treatment furnace 1, what is carried into the furnace body 2 is the object W to be heat-treated.
Since the attachment 7 has only the attachment 7 on which it is mounted, and the attachment 7 has an extremely small heat capacity as compared with the trolley 5, the heat loss is small and the running cost is saved. In the description of the embodiments, the case where the present invention is applied to the drying oven for coating has been described, but the present invention is not limited to this and can be applied to any other heat treatment apparatus.

[0012]

As described above, according to the present invention, the floor conveyor that conveys the object to be processed is laid along the underfloor of the furnace body, and the carriage is transported under the floor by the floor conveyor. Since the floor conveyor that causes heat loss is not laid inside the main body, it is possible to shorten the startup time of the heat treatment furnace at the start of operation. Since the upright columns can be passed through the slits formed in the floor wall of the furnace body and the object to be processed can be transferred in the furnace body, the object to be processed can be reliably heat-treated at the same time. The trolley having a large heat capacity has an excellent effect that the running cost can be saved without transferring heat outside the furnace main body to remove heat in the furnace main body.

[Brief description of drawings]

FIG. 1 is a front view showing an example of a heat treatment furnace according to the present invention.

[Explanation of symbols]

 W ... Object to be treated 1 ... Heat treatment furnace 2 ... Furnace body 4 ... Floor conveyor 5 ... Bogie 6 ... Posts 8 ... Floor wall 9 ... Slit

Claims (1)

[Claims] 1. The object to be treated (W) is a floor conveyor (4)
In a heat treatment furnace which is placed on a trolley (5) of the furnace and is transported in the furnace body (2), a floor conveyor (4) for transporting an object to be treated (W) is laid under the floor of the furnace body (2). ,
The object to be treated (W) is placed on the furnace main body (2) on the center side of the carriage (5) that is transported under the floor by the floor conveyor (4).
A pillar (6) for supporting the inside is erected, and a slit (9) for passing the pillar (6) is formed in the floor wall (8) of the furnace body (2) along the track of the truck. Heat treatment furnace characterized by being