JPH1022293A - Burning furnace - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a burning furnace which minimizes heat radiation loss, for burning board-like electronic parts such as liquid crystal boards, integrated circuit boards, semiconductor boards and the like. SOLUTION: Inside a furnace 2, four rack frames, 3a, 3b, 3c and 3d with a large number of steps in which works can be put by inserting them in from the front, are housed rotatably, and besides, to the open side of the furnace 2, a shutter door 4 with a rectangular slit 5 whose size is large enough to load/ unload one work is attached, and also the shutter door 4 can be moved intermittently vertically in such a way that its slit 5 can be risen and fallen to a position corresponding to one of the frames 3a to 3d from the lowest to the highest and can be stopped to put in and take out works from one of the required rack frames.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a firing furnace for firing a plate-like electronic component such as a liquid crystal plate, an integrated circuit plate, and a semiconductor plate.

[0002]

2. Description of the Related Art A conventional baking furnace is provided with an opening / closing door, such as a double door, which covers the whole surface of the baking furnace at the front open surface. Electronic components (hereinafter, referred to as workpieces) are taken in and out of the furnace based on opening and closing of the door.

[0003]

As described above, when the work is taken in and out based on the opening and closing of the door, the temperature in the furnace is lowered every time the opening and closing is performed, and therefore, a large energy loss occurs. In addition to the above, frequent changes in the furnace temperature have had an adverse effect on firing. The present invention has been made to provide a novel firing furnace which has solved such a conventional problem.

[0004]

According to the present invention, a furnace body 2 having a front open surface is mounted on a central portion of a base 1, and inside the furnace body 2, a central portion of the furnace body 2 is provided. Has four shelves 3
A rotating shaft 3 on which a, 3b, 3c, and 3d are attached so as to exhibit a radial shape at an equal angle is rotatably erected, and the shelf frames 3a, 3b, 3c, and 3d insert and accommodate a work from the front side. For this reason, a large number of shelves are provided, and in order to sequentially shift to a position facing a shutter door 4 described below based on the rotation of the rotating shaft 3,
A shutter door 4 having a rectangular slit 5 having a size large enough to allow one workpiece to be taken in and out is mounted on the open surface of the shutter door 4 so as to be able to move up and down freely. Ascending and descending to correspond to each stage from the lowest order to the highest order of the shelf frame 3, and the corresponding shelf frame 3
The intermittent ascending and descending movement is performed such that the stop for accommodating and removing the work from and to the steps a, 3b, 3c, and 3d is performed. The present invention has solved the conventional problems based on the adoption of such a configuration.

[0005]

Embodiments of the present invention will be described below. In FIG. 1, reference numeral 1 denotes a base, and 2 denotes a furnace body mounted at the center of the base 1 and having an open front surface. As shown in FIG. 6, a rotary frame in which four shelf frames 3 a, 3 b, 3 c, and 3 d are attached to the inner central portion of the furnace body 2 so as to exhibit a radial shape (a plane cross shape) equiangular with each other. The shaft 3 is rotatably erected. In addition, the respective shelf frames 3a, 3
Each of b, 3c, and 3d has a large number of shelves for accommodating a work inserted from the front side. As shown in FIG. 6, each of the shelf frames is configured in such a manner that the work is accommodated by receiving the work W with the receiving pieces provided on both sides. In addition, ventilation slits are arranged on both sides of each shelf frame so that circulation of hot air is not hindered. As shown in FIGS. 7 to 9, the temperature inside the furnace can be appropriately maintained by the air blowing device (14) embedded in the outer edge of the furnace body opening.

Reference numeral 3e denotes a driving motor for the rotating shaft 3, which rotates the rotating shaft 3 by 90 degrees so that four shelf frames 3a, 3b, 3c , 3d are sequentially arranged in the facing state. Note that the rotation of the rotating shaft 3 is rotated when the work of accommodating or removing the work from the shelf frame facing the shutter door 4 is completed, and the next shelf frame moves to a position in front of the shutter door 4. The rotation control is performed as described below.

As shown in FIG. 6, the inside of the furnace body 2 receives the heat generated by the sheathed heater A through the HEPA filter B and is stored in the shelf frames 3a, 3b, 3c, 3d. A hot air circulation path is formed that is injected into the work W and guided to the sirocco fan C. In FIG. 3, D is a drive motor for the fan C.

Reference numeral 4 denotes a shutter door which is attached to the open surface of the furnace body 2 so as to be able to move up and down. The front surface of the shutter door has a rectangular shape large enough to allow one workpiece to be taken in and out. A shape slit 5 is provided. And, when the slit 5 is in the highest position of the shutter door 4,
The shutter door 4 is configured to be moved up and down so as to be positioned at the uppermost position of each of the shelf frames 3a, 3b, 3c, 3d and at the lowest position when the shutter door 4 is lowered. . As shown in FIGS. 7 to 9, the shutter door (4) is formed to be substantially the same size as the furnace body opening hole, thereby reducing equipment costs by saving materials and reducing operating costs by saving power. It becomes possible.

The above-described lifting and lowering operation of the shutter door 4 includes, as shown in FIGS. 3 and 4, a sliding body 7 which moves forward and backward via a predetermined drive motor 6 and a shutter door 4.
And the lower end of the shutter door 4 is connected via an interlocking link rod 8 so that the shutter door 4 can be moved up and down based on the forward and backward movement of the sliding body 7. Then, the shutter door 4 is raised and lowered by an intermittent raising and lowering movement in which the slits 5 sequentially stop the respective stages of the respective shelf frames 3a, 3b, 3c and 3d from below, for example, so that the work W is taken in and out. Thus, the sliding member 7 is configured to perform electrical control.
Further, the movable body (4a) provided at both ends of the front surface of the shutter door (4) can be configured to perform the above-mentioned vertical movement and intermittent vertical movement.

1 and 2, reference numeral 1a denotes an inlet stage, and 1b denotes an outlet stage. The outlet stage is provided symmetrically on the left and right portions of the base 1 so as to be located on both sides of the furnace body 2.
The two stages are for mounting the work W, and the unprocessed work is mounted on the entrance stage 1a, and the processed work is mounted on the exit stage.

Reference numeral 9 denotes an automatic arm, which is an entrance stage 1
a, for unloading the unprocessed work, and inserting the unprocessed work into the target shelf frame in the furnace through the slit 5 of the shutter door 4, and removing the processed work in the furnace. Exit stage 1 from the target shelf frame
The operation for taking out the workpiece, which is to be placed on the workpiece b, is performed. The automatic arm 9 that performs such an operation is an existing one, and the configuration of the automatic arm 9 itself is not a main part of the present invention. In other words, the automatic arm 9 has a rotating motion as shown in FIG. 2 and an arm 9 by a link for accommodating and taking out the work.
The forward and backward movement of a and the overall lifting movement corresponding to the slit 5 moving to the position of the target shelf frame are performed. The automatic arm 9 having such a function is commercially available as a so-called manufacturing robot.

Reference numeral 10 denotes a cooling hood provided so as to cover the upper portion of the outlet stage 1b, for cooling the processed work by blowing cool air thereto. A hot air suction duct 11 (see FIG. 3) is provided before and after the outlet stage 1b to prevent the heat of the processed work from radiating into the room.

In FIG. 2, reference numeral 12 denotes an intake duct with a valve, and reference numeral 13 denotes an exhaust duct with a valve for controlling the air inside the furnace.

The firing furnace according to the present invention operates as follows. As shown in FIG. 6, the inside of the furnace body 1 generates heat due to energization of the sheath heater A, and the hot air becomes HEP with the driving of the sirocco fan C.
The light is guided to each of the shelf frames 3a, 3b, 3c, 3d via the A filter B. Therefore, the respective shelf frames 3a, 3
If the work W is accommodated in b, 3c, and 3d, heat treatment is performed on the work W. The generated heat is circulated through a path shown by an arrow in FIG.

By the way, the work is stored in the furnace body 2, that is, the work W is inserted into each of the shelf frames 3a, 3b, 3c, 3d, which is performed as follows. First, the shutter door 4 is kept at the lowest position or the highest position. 1 and 4, since the shutter door 4 is at the lowest position, the description will be made based on this. When the shutter door 4 is at the lowermost position, the slit 5 is provided in the shelf frame 3a facing the shutter door 4.
(See FIG. 2). Therefore, the unprocessed work placed on the entrance stage 1a is scooped by operating the automatic arm 9, and is stored in the lowermost stage of the shelf frame 3a from the slit 5, and then returned to the original position.

Next, the shutter door 4 is slightly raised,
The slit 5 is moved to the second position from below the shelf frame 3a. In this state, the unprocessed work placed on the entrance stage 1a is scooped out by operating the automatic arm 9 as described above, and the second work from the bottom in the shelf frame 3a is cut out from the slit 5. Then, it is returned to the original position. In this way, the shutter door 4 is raised intermittently, and each time the slit 5
Then, the unprocessed work is stored in each stage in the shelf frame 3a. By repeating such an operation, when the shutter door 4 is raised to the highest position, the work of accommodating the work in each stage of the shelf frame 3a is completed. In addition, such an upward movement of the shutter door 4 is caused by advancing the sliding body 7 via the drive motor 6 as shown in FIGS. This is performed when the shutter door 4 connected at the lower end is pushed up. Alternatively, the movable movement (4a) provided at both ends of the front surface of the shutter door (4) makes it possible to perform such an upward movement.

After the work accommodating operation for one shelf frame is completed as described above, the rotating shaft 3 is rotated by 90 degrees in the direction of the arrow shown in FIG.
The next shelf frame 3b moves so as to face the shutter door 4. In this state, the shelf frame 3
The work accommodating operation as described above is performed for each stage b. At this time, since the slit 5 of the shutter door 4 is at the uppermost position as described above, the insertion of the work into the shelf frame 3b starts from the uppermost stage.

As described above, each shelf frame 3a, 3b, 3
Although the work of inserting the work W into c and 3d is performed, the heat treatment is performed on each work from the time when the work is inserted. Therefore, since the heat treatment of the work will be completed sequentially from the first stored work,

The removal after completion of the heat treatment for each of the works accommodated as described above is performed as follows. By the way, when the work W is inserted into each of the shelf frames 3a, 3b, 3c, 3d as described above, the shutter door 4 is lowered to the lowest position when the work is completed. The slit 5 is located at the lowest stage of the shelf frame 3a in which the work is first stored. In this state, the automatic arm 9 is operated to enter the furnace from the slit 5, and at the same time, the lowermost work is pulled out and moved to the outlet stage 1b. The processed work taken out in this way is cooled based on the air blown by the cooling hood 10.

Next, the shutter door 4 is slightly raised,
The slit 5 is moved to the second position from the bottom of the shelf frame 3a. In this state, as described above, the automatic arm 9
Is operated to enter the furnace from the slit 5 and draw the second work from the bottom, and move it to the exit stage 1b. In this way, the shutter door 4 is raised intermittently, and each time the processed work stored in each stage in the shelf frame 3a is taken out from the slit 5. Such operations are repeated, and when the shutter door 4 is raised to the highest position, the operation of taking out the processed work from each stage of the shelf frame 3a is completed.

When the removal of the work from the shelf frame 3a is completed, the rotary shaft 3 is rotated by 90 degrees to move the next shelf frame 3b to a position facing the shutter door 4. Then, the workpieces are sequentially taken out from the top of the shelf frame 3b downward. By performing such operations on the shelf frames 3c and 3d, the removal of the work is completed.

By the way, in the operation of the above-described embodiment, a process of taking out all the processed workpieces and then accommodating the next unprocessed workpiece is performed. However, such an operation mode causes an irrationality that the inside of the furnace is once emptied. Therefore, after taking out the processed work, a new unprocessed work is accommodated via the automatic arm, and when the accommodation is completed, the operation is performed such that the processed work is taken out from the next shelf frame. By doing so, a very rational loading and unloading of the workpiece is achieved.

That is, the above description of the operation is a simplified operation for explaining the basic principle of the present invention. Therefore, actually, after taking out the processed work and storing the finished work in the same shelf,
By repeating such operations as taking out the processed work to the next shelf frame and storing the unprocessed work, the work can be rationalized and speeded up. The present invention is based on the principle that such an operation is performed.

The supply of the unprocessed work to the inlet stage 1a and the removal of the processed work from the outlet stage 1b are automatically performed via a conveyor or a take-out arm, as appropriate.

[0025]

According to the present invention, a furnace body 2 having an open front surface is mounted on the center of a base 1, and inside the furnace body 2, four Individual shelf frames 3a, 3b, 3
A rotating shaft 3 on which c and 3d are attached so as to exhibit an equiangular radial shape is rotatably erected.
b, 3c and 3d have a large number of shelves for accommodating the work by being inserted from the front side.
It is configured so as to sequentially shift to a position facing a shutter door 4 described below based on the rotation of the furnace, and the open surface of the furnace body 2 is large enough to allow one workpiece to be taken in and out. The shutter door 4 provided with the rectangular slit 5 is mounted so as to be able to move up and down freely.
The slit 5 is moved up and down so as to correspond to each of the stages from the lowest to the highest of the shelf frames 3a, 3b, 3c and 3d, and stops for accommodating and taking out the work to and from the corresponding steps of the shelf frame. Since such an intermittent elevating movement is performed, the accommodation of the unprocessed work and the removal of the processed work are performed through the slit 5, which is the minimum opening.

Therefore, as in the prior art, a furnace body is provided with an opening / closing door which covers the entire front surface of the furnace body at once.
That is, the energy loss caused by the temperature drop in the furnace and the frequent change in the furnace temperature occur each time the door is opened and closed. In the present invention, such a problem as generation of an adverse effect on firing is completely eliminated.

Further, as described in claim 2, an inlet stage 1a and an outlet stage 1b are provided symmetrically on the left and right portions of the base 1 so as to be located on both sides of the furnace body 2, and are provided on the inlet stage 1a. Scoop up the unprocessed work in
This is passed through the slits 5 of the shutter door 4 and the
a, 3b, 3c, 3d, and an operation for accommodating a work to be sequentially inserted into the furnace, and a processed work in the furnace is sequentially extracted from any of the shelf frames 3a, 3b, 3c, 3d. By arranging on the base 1 an automatic arm 9 for performing an operation for taking out the work, that is, placing the work on the exit stage 1b, the firing operation of the work is performed automatically. It will be.

Further, as described in claim 3, the shutter door (4) is formed to be substantially the same size as the furnace body opening hole, so that the equipment cost can be reduced by saving materials and the operation cost can be reduced by saving power. The temperature inside the furnace can be more appropriately maintained by the air blowing device (14) embedded in the outer edge of the furnace body opening.

[Brief description of the drawings]

FIG. 1 is a front view of a firing furnace according to the present invention.

FIG. 2 is a partially cutaway plan view of a firing furnace according to the present invention.

FIG. 3 is a partially cutaway side view of the firing furnace according to the present invention.

FIG. 4 is a partially cutaway front view for explanation showing a shutter door 4 as a main part of the present invention.

FIG. 5 is an explanatory vertical sectional side view showing a shutter door 4 as a main part of the present invention.

FIG. 6 is an explanatory vertical sectional front view showing the inside of a furnace body 1.

FIG. 7 is a front view of a firing furnace according to a third aspect of the present invention.

FIG. 8 is a partially cutaway plan view of the firing furnace according to the third aspect of the present invention.

FIG. 9 is an explanatory enlarged perspective view showing the shutter door 4 and the air blowing device 14 according to the third aspect of the present invention.

[Explanation of symbols]

 Reference Signs List 1 base 1a entrance stage 1b exit stage 2 furnace body 3 rotating shaft 3a shelf frame 3b shelf frame 3c shelf frame 3d shelf frame 3e drive motor A seed heater B filter C sirocco fan D drive motor W work 4 shutter door 5 slit Reference Signs List 6 Drive motor 7 Sliding body 8 Interlocking link rod 9 Automatic arm 9a Arm section 10 Cooling hood 11 Duct for hot air suction 12 Intake duct with valve 13 Exhaust duct with valve 14 Air blower

Claims (3)

[Claims] 1. A furnace body (2) having an open front surface is mounted at the center of a base (1), and inside the furnace body (2),
At the center of the inside of the furnace body (2), four shelf frames (3a,
3b, 3c, 3d) are mounted so as to be rotatable, with a rotating shaft (3) attached so as to exhibit an equiangular radial shape, and the shelf frame (3a, 3b, 3c, 3d) inserts a work from the front side. And a plurality of shelves for accommodating the furnace body, and sequentially moved to a position facing a shutter door (4) described below based on the rotation of the rotation shaft (3). On the open surface of (2), a shutter door (4) having a rectangular slit (5) having a size large enough to allow one workpiece to be taken in and out is mounted so as to be movable up and down, and the shutter door is provided. (4) Elevating and lowering the slits (5) to correspond to the lowest to highest steps of the shelf frame (3a, 3b, 3c, 3d), and accommodating the work in the corresponding steps of the shelf frame. And a stop for removal Firing furnace, characterized in that intermittent lifting movement such is constructed as done. 2. An inlet stage (1a) and an outlet stage (1b) are provided symmetrically on left and right portions of a base (1) so as to be located on both sides of a furnace body (2).
a) When the unprocessed work on the top is skimmed, and this is sequentially inserted from the slit (5) of the shutter door (4) into any of the shelf frames (3a, 3b, 3c, 3d) in the furnace. For the operation for accommodating the work, and for taking out the work, which means that the processed work in the furnace is sequentially extracted from any of the shelf frames (3a, 3b, 3c, 3d) and placed on the exit stage (1b). The firing furnace according to claim 1, wherein an automatic arm (9) for performing the operation of (1) is provided on the base (1). 3. The shutter door (4) is formed to be substantially the same size as the furnace body opening hole, and the movable doors (4a) are provided at both ends of the front surface of the shutter door (4), so that the ascending and descending and the intermittent suitable ascending and descending movement can be performed. The firing furnace according to claim 1 or 2, wherein an air blowing device (14) is buried at an outer edge of the furnace body opening portion.