JPH0247440Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to an oven device for heat-treating a workpiece in a heating furnace having a movable part for transporting the workpiece inside.

BACKGROUND TECHNOLOGY For example, when applying a powder resin and drying it to harden the applied resin, such as a powder-wrapped resin-clad multilayer ceramic capacitor, an oven device 1 as shown in FIG. 3 is used. Heat and process. The oven device 1 includes a workpiece in a heating furnace,
For example, a laminated ceramic capacitor coated with powder resin is transferred, held for a certain period of time, and continuously heat-treated. Movable part for transportation 6
It consists of The heating furnace 2 has a heating part 5 at the bottom,
An inlet 2a and an outlet 2b for carrying the works 7 (usually held in batches in a holder) are formed on the side furnace wall. The first elevator 3 sequentially raises the work 7 carried in through the loading port 2a one pitch at a time, and transports it to the second elevator 4 by the movable part 6 at the top stage. The second elevator 4 sequentially lowers the work 7 transported by the movable part 6 one pitch at a time, and transports it out from the exit 2b at the lowest stage. Heating section 5
is located at the bottom of the heating furnace 2 and uses a fan 8 to uniformly heat the inside of the furnace. The movable part 6 for transporting the workpiece is connected to and driven by an external drive part 9 through a shaft 10 serving as a connecting part, holds the workpiece 7 at the top stage, and transports the workpiece 7 from the first elevator 3 to the second elevator 4. . That is, the drive section 9 is located above the outside of the heating furnace 2 and reciprocates in the lateral direction, and the shaft 10 is located above the outside of the heating furnace 2.
The movable part 6 and the drive part 9 are connected to each other by penetrating the top wall of the movable part 6, and the movable part 6 and the driving part 9 are reciprocated up and down. Therefore, shaft 10
As shown in FIG. 4, a linear opening 2 is formed in the top wall of the heating furnace 2 through which the shaft 10 moves, along the transfer path of the shaft 10. Due to the vertical movement of the movable part 6, the movable part 6 moves in a rectangular shape within the vertical plane.

In the oven device 1, when the workpiece 7 is carried into the heating furnace 2 from the previous process through the carrying port 2a,
First, the workpiece 7 is placed on the lowest stage of the first elevator 3, and is successively raised one pitch at a time. and,
When the workpiece 7 reaches the top stage, the movable part 6 is lowered by the lowering of the shaft 10 and the movement of the drive part 9, moves to the first elevator 3 side, holds the workpiece 7, and then the shaft 10 is raised and moved. As the drive unit 9 moves, the movable unit 6 rises and moves toward the second elevator 4 side. After that, when the movable part 6 is lowered, the workpiece 7
are placed on the top stage of the second elevator 4, and the
It goes down one pitch at a time. When the workpiece 7 reaches the lowest stage, it is carried out of the heating furnace 2 through the carrying-out port 2b and sent to the subsequent process. That is, while the workpiece 7 is being transferred from the carry-in port 2a to the carry-out port 2b by the first and second elevators 3 and 4, it remains in the heating furnace 2 and is subjected to heat treatment such as drying.

By the way, according to the oven device 1, the furnace wall has openings such as the loading port 2a, the loading port 2b, and the opening 2c, so that the hot air inside the furnace leaks to the outside and is trapped in the working chamber, causing the room temperature to rise and making it difficult to work. The environment deteriorates. Therefore, attempts to lower the room temperature by air conditioning are wasteful and increase air conditioning costs. Furthermore, if harmful substances are generated from the heat-treated workpieces, they will leak out of the furnace along with the hot air and be dispersed into the working room, resulting in a worsening of the working environment. Therefore, this type of heating furnace is generally equipped with one or more exhaust ports, and an exhaust duct is connected to this exhaust port to exhaust some of the hot air inside the furnace, thereby preventing the hot air from coming out from the openings. , controls the balance of internal air components.
Increasing this exhaust volume can prevent hot air from leaking from all openings and gaps, but this may prevent the temperature inside the furnace from rising to the required point, or may prevent the necessary temperature balance from being achieved in each part. Therefore, it is often impossible to implement.

Therefore, if only this exhaust is used, the hot air will still leak out from the openings along with harmful substances, and in particular, the hot air will rise inside the furnace, so the inlet 2a and outlet 2a, which are relatively narrow and located in the lower position, will still leak out from the openings. 2
It leaks easily from the opening 2c in the top wall, but hardly leaks from the opening 2c in the top wall. At this time, the drive section 9 is located near the opening 2c, and if there is a motor, gears, etc. therein, these will be exposed to hot air and will be easily damaged due to failure, wear, oil shortage, etc.

That is, it is necessary to exhaust the hot air leaking out of the opening 2c in the top wall of the heating furnace 2 to the outside of the working room. For example, as shown in FIG. 3, a large exhaust duct 11 is installed above the heating furnace 2, As shown in FIGS. 4 and 5, heat-resistant rubbers 12, 12 such as silicone are placed along the path of movement of the shaft 10 to close the gap between the openings 2c.

In the case of the exhaust duct 11, the hot air leaking from the opening 2c is exhausted outside, and in the case of the heat-resistant rubber 12, as shown in FIG. Where the shaft 10 is located, the rubber is pressed against the shaft 10 to reduce the gap.

Problems to be Solved by the Invention By the way, in order to prevent hot air from leaking into the room from the opening 2c in the top wall of the heating furnace 2 described above, an attempt was made to dispose the exhaust duct 11 upward to exhaust the hot air to the outside. In this case, a large amount of air must be discharged, and if air conditioning were used, a large amount of air would be discharged, resulting in a large amount of wasted air, increasing costs. Further, although the drive unit 9 has been relatively improved, it is still exposed to high temperatures, so the motor etc. are likely to break down. Next, when trying to eliminate the gap by disposing the heat-resistant rubber 12 in the opening 2c, as shown in FIG.
e remains and hot air leaks out.

Means for Solving the Problems The present invention heat-treats a workpiece in a heating furnace, has a movable part for transporting the workpiece in the furnace, and has a connection part that is inserted into a part of the furnace wall by opening it. In an oven device in which the movable part is connected to an external drive part, a plurality of long and rectangular heat-resistant rubbers are closed and attached to the opening in a cylindrical shape with a substantially rhombic cross section, and attached to the oven wall along the diagonal of the rhombus. It is characterized in that the connecting portions are vertically arranged and sandwiched by the rubber, and an exhaust duct is connected to the open end of the cylindrical shape.

Function: In an oven device that has a movable part in the heating furnace and has a part of the furnace wall opened to connect the movable part to an external drive part, a plurality of long rectangular heat-resistant rubbers are installed in the opening. When the tubes are closed and attached to a diamond-shaped cylinder, the connection part is sandwiched between them, and the exhaust duct is connected to the open end of the cylinder, the cylinders are pressed together by heat-resistant rubber and are sealed, making the connection. Where there are parts, etc., it can be closed leaving a small gap. The hot air inside the furnace enters the inside of the cylinder through this gap, but is sucked into the exhaust duct attached to the open end and exhausted outside.

Embodiment An embodiment of the present invention will be described below with reference to FIGS. 1 and 2. The same reference numerals as in FIG. 3 indicate the same parts. In the figure, 2 is a heating furnace, 6 is a movable part, 9 is a drive part, 10 is a shaft serving as a connecting part, 13 is a rectangular heat-resistant rubber, and 14 is an exhaust duct. The heating furnace 2 has first and second elevators 3, 4 and a movable part 6 therein, as in the conventional case, and heat-treats the workpiece 7. The movable part 6 is located inside the heating furnace 2 and is connected to a drive part 9 outside the furnace by a shaft 10, and an opening 2c is formed in a part of the furnace wall through which the shaft 10 passes. The drive unit 9 is located above the top wall of the heating furnace 2 and reciprocates in the lateral direction, and the shaft 10 is driven to reciprocate up and down by the drive unit 9. The heat-resistant rubber 13 is formed by closing four long rectangular rubber plates into a cylindrical shape with a substantially rhombic cross section, and the apex portions of the rhombus are attached to the opening 2c, which are opposed along the longitudinal direction.

At this time, the shaft 10 is placed vertically on the furnace wall along the diagonal of the rhombus so as to be sandwiched between heat-resistant rubbers 13 (see FIG. 2). The exhaust duct 14 is connected to the cylindrical open end of the heat-resistant rubber 13 .

The operation of the present invention in the above configuration will be described below. First, as in the past, the workpiece 7 is carried into the heating furnace 2, transferred within the furnace by the first and second elevators 3 and 4 and the movable part 6, held for a certain period of time, heated and
Process. At this time, the cylinders closed by the heat-resistant rubber 13 are pressed together and sealed, leaving a small gap around the shaft 10. This gap exists not only on the lower edge side of the cylindrical shaft 13, but also as shown at 2f in FIG.
It also occurs on the upper edge. On the other hand, the hot air inside the furnace enters the inside of the cylindrical shaft 13 through this gap, but it is sucked into the exhaust duct 14 connected to the open end and is discharged outside, and is then released outside the furnace through the upper gap 2f. Does not appear. Therefore, the working environment is improved because the hot air inside the furnace is not trapped in the working room together with harmful substances.

Effects of the invention According to the invention, in an oven device that has a movable part in the heating furnace and connects the movable part to an external drive part by opening a part of the furnace wall, a plurality of Since the rectangular heat-resistant rubber is closed and attached to a cylindrical shape with a roughly diamond-shaped cross section, and the above-mentioned connection part is sandwiched between them, and the exhaust duct is connected to the open end of the cylindrical shape, the area around the above-mentioned connection part of the cylindrical heat-resistant rubber is Hot air leaking from inside the furnace through the gap created in the cylinder is sucked into the exhaust duct from inside the cylinder and discharged outside. Therefore, even if the hot air inside the heating furnace leaks out of the furnace together with harmful substances, it is not trapped in the working room, making it possible to improve the working environment and reduce air conditioning costs.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an embodiment of the oven device according to the present invention, FIG. 2 is a cross-sectional view of a main part of the top wall of the heating furnace of the oven device shown in FIG. 1, and FIG. 3 is a specific example of the conventional oven device. 4 is a perspective view of the oven device shown in FIG. 3, FIG. 5 is a side sectional view of the heating furnace top wall of the oven device shown in FIG. 4, and FIG.
FIG. 2 is a plan view of a main part of the heating furnace top wall of the oven device shown in the figure. 2... Heating furnace, 2c... Furnace wall opening, 6... Movable part, 7... Workpiece, 9... Drive part, 10... Connection part, 13... Long rectangular heat-resistant rubber, 14... Exhaust duct .

Claims (1)

[Scope of utility model registration request] In an oven apparatus in which a movable part for transport is provided in a furnace for heat-treating a workpiece, and this movable part is connected to an external drive part by a connecting part inserted through an opening in a part of the furnace wall, the above-mentioned opening A plurality of long and rectangular heat-resistant rubbers are closed and attached to the section into a cylindrical shape with a substantially diamond-shaped cross section, and the connection section is placed vertically on the furnace wall along the diagonal of the rhombus, sandwiched between the rubbers, and the cylindrical shape An oven device characterized in that an exhaust duct is connected to the open end of the oven.