JPH0222879B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a novel structure of a firing furnace for firing objects to be fired, such as tile bases.

[Conventional structure and its problems] A conventional firing furnace consists of a furnace body that has a tunnel-like or long cylindrical structure integrally formed of refractory bricks, etc., and a suitable wall on both sides of the furnace body. A large number of objects to be fired are inserted through a large number of insertion holes drilled at intervals, and are arranged so as to be rotatable around their own axis but immovable in the longitudinal direction of the furnace body. It consisted of rollers for conveying objects.

That is, as shown in FIG. 8, the conventional firing furnace 1
On the left and right furnace walls 2a, 2b of the furnace body 2, the furnace walls 2a, 2
Porcelain conveying rollers 4 are inserted one by one into a large number of insertion holes 3, 3 bored at appropriate intervals along the longitudinal direction of b, and both ends of each porcelain roller 4 are
It is attached to roller supports 5 and 6 disposed on the left and right outer sides of the furnace body 2, respectively. The roller support 5 on either side is provided with a large number of chain sprockets 5a formed to correspond to each porcelain roller 4 and to be coaxial with the corresponding porcelain roller 4. A common drive chain 7 is meshed with these many chain sprockets 5a. By driving the drive chain 7, the chain sprockets 5a, 5
a... Therefore, when all the porcelain rollers 4 are rotated around their axes at a predetermined rotational speed, the objects 8 to be fired placed on the porcelain rollers 4 are sequentially transferred to one porcelain roller. 4, so that the object to be fired 8 can be transported into the furnace. However, the firing furnace 1 having such a structure had the following drawbacks.

B. The porcelain roller 4' with glaze 9 etc. attached to the roller surface needs to be replaced with a new porcelain roller 4, but this work requires a lot of effort and time. First, in order to pull out the dirty porcelain roller 4' from the insertion holes 3, 3, the roller support 6 must be removed from the bracket 10. Next, a new porcelain roller 4
is inserted into the insertion holes 3, 3, and its tip is attached to the roller support 5. Furthermore, the other end is attached to the roller support shaft 6, and the roller support 6 is fixed to the bracket 10. Since the above work is necessary for each porcelain roller, it is necessary to install the roller in a high-temperature firing area where the surface of the roller is inevitably contaminated by the adhesion of molten glaze due to the high-temperature atmosphere inside the furnace. The effort and time required to replace the porcelain rollers (usually 400 to 500 or more) required is enormous.

○B In addition, the porcelain roller 4', which is disposed in the high-temperature firing area of the firing furnace and is heated to a high temperature of 1100 to 1300°C, is inserted into the insertion hole 3, as described above.
Even if it is extracted from the furnace, the temperature difference between the temperature outside the furnace and the temperature outside the furnace is large, so rapid cooling may cause damage or cracks. Furthermore, when a new porcelain roller 4 is placed in the high-temperature firing area of a firing furnace, similar problems occur due to rapid heating. Therefore, when actually replacing the porcelain rollers, it is necessary to sufficiently lower the temperature inside the furnace in the high-temperature firing area in advance so that the removed porcelain rollers and the newly inserted porcelain rollers will not be damaged by heat shock. It cannot be implemented unless it is prepared. However, it is obvious that the operation of the kiln cannot be continued if the temperature inside the kiln in the kiln zone becomes lower than a predetermined temperature. Therefore, in conventional firing furnaces, it is necessary to stop the operation for a long time every time the porcelain roller is replaced, and the operating efficiency of the furnace itself has to be extremely low.

○C If an accident occurs where the porcelain roller 4 breaks during operation of the firing furnace, the broken porcelain roller 4 will fall to the bottom of the furnace and the conveying roller will be chipped at that location. If the furnace continues to operate, the material to be fired 8 that has been conveyed to the missing part of the conveying roller will not be sent any further and will stagnate there, or will be transferred from the gap where the porcelain roller is missing. It falls to the bottom of the hearth. Therefore, in the past, every time a porcelain roller broke, it was necessary to suspend operation of the kiln and install a new porcelain roller.
Production efficiency was particularly poor.

○D Porcelain conveyor roller 4 installed in the firing furnace
rotates around its own axis to send out the object to be fired 8 placed thereon, so that the objects to be fired 8, 8, . . . Even if the objects to be fired 8 are aligned and placed on the conveyance roller, the surface of the porcelain roller 4 and the object to be fired 8 may come into contact with each other during conveyance.
The slips that occur between the objects 8 and the back surface of the objects disturb the alignment of the objects 8, 8, and so on, and the objects 8 may collide with each other and be damaged, or the objects 8 may collide with each other and be damaged, or the objects 8 may collide with each other and be damaged. There was an inconvenience that it took a lot of time to arrange and transfer the images.

[Object of the present invention] The first object of the present invention is to make it possible to replace conveyance means such as porcelain rollers without reducing the temperature inside the furnace, especially the temperature inside the furnace in the high-temperature firing area. The purpose of the present invention is to provide a new firing furnace.

A second object of the present invention is to provide a new firing furnace in which the replacement of conveying means such as porcelain rollers is simple and can be completed within an extremely short period of time.

A third object of the present invention is to provide a new firing furnace in which the alignment of the objects to be fired is not disturbed even when they are transported through the furnace.

Furthermore, a fourth object of the present invention is to provide a two-stage kiln having a structure that makes effective use of conveying means and the like.

[Structure of the Invention] The first means adopted by the present invention is a lower half furnace body of an upper furnace, which is formed by integrally forming a furnace bottom and lower halves of left and right furnace side walls, and a lower half furnace body of the upper furnace. An upper half furnace body of the lower furnace, which is suspended below and is integrally configured with the furnace ceiling and the upper halves of the left and right furnace side walls, and on both left and right outer sides of the lower half furnace body of the upper furnace, It moves along the lower half of the furnace side wall at approximately the same height as the upper end of the lower half of the furnace side wall, and at approximately the same height as the lower end of the upper half of the furnace side wall on both left and right outer sides of the upper half of the furnace body of the lower furnace. one endless chain on each left and right that is stretched so as to return along the upper half of the furnace side wall at the same height position; a drive device that drives both endless chains in synchronization with each other; The left and right ends are gripped by chucking means attached at regular intervals and the left and right chucking means, and as the endless chain is driven synchronously, the lower half furnace body of the upper furnace and the upper half of the lower furnace Made of a heat-resistant material that is guided directly under the furnace body in the longitudinal direction of the upper half furnace body and the lower half furnace body, the length dimension between both ends is greater than the width dimension of the lower half furnace body and the upper half furnace body. A conveyance gap having a height dimension that does not impede the conveyance of the conveyance means, which is also long, is provided between the conveyance means and the upper end surface of the lower half of the furnace side wall of the upper furnace, and the conveyance means is suspended from above. The upper half of the upper furnace is formed by integrally forming the upper half of the furnace ceiling and the upper halves of the left and right furnace side walls, and the conveying gap has a height dimension that does not impede the conveying of the conveying means. Provided between the lower end surface of the upper half of the furnace side wall of the lower furnace,
It is constructed from a lower half furnace body of a lower stage furnace, which is disposed below and is integrally formed with the furnace bottom and the lower halves of the left and right furnace side walls.

A second means adopted by the present invention is a planetary chain sprocket formed in the chucking means provided on either the left or right endless chain of the chucking means, in addition to the structure adopted by the first means. The device is constructed by adding a solar device consisting of a second chain disposed around the entire circumference of the endless chain circuit or a part thereof and in a differential relationship with the planetary device.

[Description of Embodiments] The present invention will be described below based on embodiments shown in FIGS. 1 to 7.

In addition, in the following description, "before" refers to the first
"Back" means the left side in Figures A, B and Figure 6.
refers to the right side in these figures. Also,
"Left" refers to the left side in FIGS. 2, 3, 4, and 7, and "right" refers to the right side in these figures.

As shown in FIGS. 1A and 1B and FIG. 2, the firing furnace body 11 in two stages, upper and lower, is composed of an upper furnace 12 and a lower furnace 16. The upper furnace 12 is divided into several sections in the front-rear direction, which is the direction in which the materials to be fired are conveyed, and each section has a furnace ceiling 13a and an upper half of the furnace side walls made of refractory bricks, etc., as shown in FIG. 13b, 13b are integrally constructed, and the upper half furnace body 1 is suspended from the upper beam 19a of the frame 19.
3, the furnace bottom part 14a and the left and right furnace side wall lower half parts 14b, 14b are integrally constructed of refractory bricks or the like, and the lower half furnace body 14 is placed on the intermediate beam 19b.
Between the upper half furnace body 13 and the lower half furnace body 14, there is a conveying means 1 such as a porcelain roller whose length between both ends is longer than the width dimension of the lower half furnace body 14.
A gap (hereinafter referred to as a conveying means passage A) is set such that the height dimension does not prevent the conveyance of the to-be-fired material 5 in the conveyance direction. The lower furnace 16
Like the upper furnace 12, it is divided into several sections in the front and back direction, and each section is
The upper half furnace body 17 is formed by integrally constructing the furnace ceiling portion 17a and the upper half portions 17b of the furnace side walls with refractory bricks, etc., and is suspended from the intermediate beam 19b of the frame 19.
The furnace bottom part 18a and the left and right furnace side wall lower half parts 18b, 18b are integrally constructed of refractory bricks, etc., and the lower half furnace body 18 is placed on the lower beam 19c. The conveying means passage A is set between the body 17 and the lower half furnace body 18.
The difference between the upper furnace 12 and the lower furnace 16 is that the left side of the upper furnace 12 is the loading side E, the right side is the loading side F, the right side of the lower furnace 16 is the loading side G, and the left side is the loading side. This is the point marked H.

Conveying means 20, 20 are disposed on the left and right outer sides of the firing furnace main body 11 along the front and back direction.
As shown in FIGS. 1A and 1B, each transmission means 20 includes an endless chain 21, reversing chain sprockets 41, 41, . . . , and a chain guide rail 22 (see FIG. 3) attached to the frame 19. It consists of a chain drive motor 23 and is configured to drive the left and right endless chains 21, 21 synchronously. As shown in FIGS. 3 and 4, a pair of chucking means 24 and 25 are attached to the conveying means 20, 20 facing each other at an appropriate interval P (see FIG. 5, for example) along the front-rear direction. P=25 to 50
A plurality of sets of conveying means holding mechanisms are attached to each unit (mm). The right chucking means 24 is
As shown in FIG. 3, the bearings 26, 26 attached to the left and right link plates 21a, 21a of the endless chain 21, the support shaft 27 pivotally supported by the left and right bearings 26, 26, and the left and right bearings 26, 26
A guide roller 28 is rotatably fitted onto the support shaft 27 in the middle of the support shaft 27, a chuck head 29 is slidably fitted onto the inner end of the support shaft 27, and
A compression coil spring 31 is fitted between the retaining ring 30 and the chuck head 29 and presses the chuck head 29 inward, and the support shaft 2
The planetary gear 32 includes a chain sprocket fitted near the outer end of the planetary gear 7. As shown in FIG. 4, the left chucking means 25 includes a bearing 26 attached to the left and right link plates 21a, 21a of the endless chain 21, and a support shaft 27' supported by the left and right bearings 26, 26.
and a guide roller 28 rotatably fitted onto the support shaft 27' between the left and right bearings 26, 26,
The chuck head 29' is attached to the inner end of the support shaft 27'. Furthermore, in the circumferential circuit of each of the endless chains 21, 21, at least the entire area on both longitudinal sides of the firing furnace main body 11 is provided with guides for the left and right chucking means 24, 25, as shown in FIGS. 3 and 4. Koro 28,2
Roller guide rails 33, 33 for guiding the rollers 8 are laid parallel to the chain guide rail 22, so that the support shafts 27, 27' of the chucking means 24, 25 maintain a horizontal state without wobbling.

The conveying means 15, 15, which are cylindrical porcelain rollers detachably attached to each set of chucking means 24, 25, are shown in FIGS. 1A, B and 2.
As shown in the figure, the endless chains 21, 2
1, the upper furnace 12 of the firing furnace main body 11
The inside of the transport means passage A extending in the longitudinal direction of
After moving in the direction of the carry-out side F, it passes outside the rear furnace, then moves inside the conveying means passage A of the lower furnace 16 from the carry-in side G in the direction of the carry-out side H, and then passes outside the front furnace. It is configured to move back into the conveying means passage A of the upper furnace 12 again. As shown in FIGS. 3 to 5, seal plates 34 are fitted into the left and right ends of the two adjacent front and rear conveyance means 15, 15, respectively, as necessary. The amount of air outside the furnace flowing in is reduced, and the radiant heat inside the furnace is prevented from leaking out of the furnace from the conveying means passage A. The seal plates 34, 34, . . .
3. It is configured to pass through a seal plate passage B formed at the outer edge of the lower furnace half body 14.

a conveying means 15 consisting of the porcelain conveying roller;
In order to rotate 15..., planetary devices 32, 32...
Solar device 3 in a pair relationship that imparts a rotational reaction force to
As shown in FIGS. 1A and 1B, 3, and 6, 5 are provided in one set each on the outside of the upper furnace 12 and the lower furnace 16. Each solar device 35 includes the planetary device 3
A second endless chain 36 is stretched so as to mesh with the chain sprocket 2, and a guide rail 37 (a third
6) and a reflective chain sprocket 38 on which a second endless chain 36 is stretched.
A transmission means 39 consisting of a gear box 39a, a line shaft 39b, etc. that transmits driving force to the
It consists of a drive source 40 (see FIG. 2) consisting of a variable speed motor, etc., and is configured to drive the conveying means 15, 15... (see FIG. 3) to rotate around their central axes at a desired rotational speed. ing. The second endless chain 36, together with the planetary device 32 and the solar device 35, forms a kind of differential rotation mechanism (same principle as a differential gear). The conveying speed of the fired object by the conveying means 15, 15, . . . consisting of conveying rollers is determined by the driving speed of the endless chain 21 and the driving speed of the second endless chain 36. Therefore, when the upper and lower furnaces 12 and 16 are each provided with one set of solar devices 35, the conveyance speed of the to-be-fired material of the conveyor means 15, 15, which passes through the upper furnace 12 and the object to be fired through the lower furnace 16 will be different. Transport means 1
5, 15... can be determined separately and independently.

Note that the solar device 35 is not limited to any driving method and is omitted from illustration, but the planetary device 3
The solar device, which is the second chain that meshes with the chain sprocket, which is shown in FIG. As the endless chains 21, 21 are driven, the transport means 15, 1
Of course, it is also possible to configure 5 to rotate on its own axis.

FIG. 7 shows another embodiment of the conveyance means holding mechanism.
The conveying means 15' is not cylindrical but has a hanging plate-like main body 1 made of porcelain and having an I-shaped longitudinal section.
5'b. The end portion 15'a of the conveying means 15' is removably fixed to chucking means 21'a consisting of attachments provided at regular intervals on the endless chain 21'. Therefore,
This conveyance means 15' is different from the examples described so far and never rotates.

[Function] Next, the function of the two-stage firing furnace according to the present invention will be explained. As shown in FIGS. 1A and 1B, the objects to be fired (not shown) such as tile bases placed on the transport means 15, 15... on the carry-in side E of the upper furnace 12 are driven by endless chains 21, 21. (see FIG. 2), which move in the conveying direction within the furnace, and are fired while passing through the heated furnace and conveyed to the discharge side F. In addition, objects to be fired (not shown) such as tile bases placed on the conveying means 15, 15, . Conveying means 1 that moves in the direction
5, 15, . . . (see FIG. 2), is fired while passing through a heated furnace, is carried out to the discharge side H, and is taken out by an unloader 43. Transport means 1
When glaze etc. adhere to the surfaces of 5, 15, etc. and the objects to be fired cannot be conveyed smoothly, the endless chains 21, 21 are intermittently moved to the carry-in side E, G or the carry-out side F, H. The conveying means 15 that has come out of the furnace due to intermittent movement is transferred to the endless chain 2.
Replace it with a new one during the outage on 1st and 21st. The conveyance means 15, 15, . . . can be replaced in a short time by anyone simply by moving the chuck head 29 of the chuck means 24 shown in FIG. 3 outwardly against the compression coil spring 31. In addition, since the above-mentioned intermittent movement does not lower the temperature of the high-temperature firing area, the conveying means 15, 15... can be carried out at a safe speed lower than the speed at which there is a risk of breakage due to rapid cooling or rapid heating. It is essential.

Further, the two-stage firing furnace according to the present invention has a conveying means 1
5, 15... are configured to temporarily exit the furnace after the conveyance of the objects to be fired is completed, and return to the lower furnace 16 or the upper furnace 12 in the opposite direction. Since this can be visually observed, it is possible to predict when the conveying means 15 should be replaced.

Furthermore, the two-stage firing furnace according to the present invention employs a so-called differential rotation mechanism using the planetary device 32 and the solar device 35, thereby reducing the rotation speed of the conveying means 15 to an extremely low rotational speed while conveying the object to be fired. conveying means 1 at a constant speed, or at least during conveying
5' is prevented from rotating, it is possible to transport the objects to be fired without disturbing their alignment, and it is possible to smoothly connect the upper furnace 12 and the lower furnace 16 to the unloader on the outlet side.

[Effects of the Invention] The conveying device for the conveying roller in the firing furnace according to the present invention has the following excellent effects.

Since it is possible to replace conveyance means such as porcelain rollers without reducing the temperature inside the furnace, especially the temperature inside the furnace in the high-temperature firing zone, the operating efficiency of the upper and lower furnaces can be improved.

Since the replacement work of conveying means such as porcelain rollers is simple and can be completed within an extremely short time, maintenance of the upper and lower furnaces can be maintained by a small number of workers.

Since the alignment of the objects to be fired is not disturbed even when they are transported through the furnace, the connection to the unloader on the outlet side of the upper and lower furnaces becomes smooth, and smooth operation is possible without any effort required.

Since the conveying means consisting of an endless chain or the like for conveying the conveying means into the upper and lower furnaces is shared, a compact and inexpensive firing furnace can be provided.

[Brief explanation of drawings]

Figures 1 to 7 show an embodiment of the two-stage firing furnace according to the present invention, in which Figures 1A and B are side views of the whole with the middle omitted, and Figure 2 is the same as that of Figure 1. −
Fig. 3 is an enlarged sectional view showing the right chucking means, Fig. 4 is an enlarged sectional view showing the left chucking means, and Fig. 5 is an enlarged side view showing the seal structure on both outsides of the firing furnace. Fig. 6 is an enlarged side view showing the solar device with the middle omitted, Fig. 7 is an enlarged sectional view showing another embodiment of the conveying means, and Fig. 8 is an enlarged front view showing the main parts of a conventional firing furnace with the middle omitted. FIG. 11... Firing furnace main body, 12... Upper furnace, 13...
...Upper half furnace body, 14...Lower half furnace body, 15...Transporting means, 16...Lower furnace, 17...Upper half furnace body, 18...
... lower half furnace body, 21 ... endless chain, 2
4, 25...Chicking means, 32...Planetary device, 35...Solar device, 36...Second chain.

Claims (1)

[Scope of Claims] 1. A lower half furnace body of an upper stage furnace formed by integrally forming a furnace bottom part and lower half parts of left and right furnace side walls; The upper half of the lower furnace body is formed by integrating the furnace ceiling and the upper halves of the left and right furnace side walls, and the left and right outer sides of the lower half of the upper furnace body are approximately the upper ends of the lower half of the furnace side walls. At the same time, on both left and right outer sides of the upper half of the lower furnace body, the lower furnace body is moved along the lower half of the furnace side wall at approximately the same height position as the lower end of the upper half of the furnace side wall. one endless chain on each left and right stretched so as to return along the half part; a driving device for driving both endless chains in synchronization with each other; and chucking means provided at regular intervals on each of the endless chains; The left and right ends are gripped by left and right chucking means, and as the endless chain is driven synchronously, the upper half furnace body is moved directly above the lower half furnace body of the upper furnace and immediately below the upper half furnace body of the lower furnace. and a conveying means made of a heat-resistant material, which is guided in the longitudinal direction of the lower half furnace body, and whose length dimension between both ends is longer than the width dimension of the lower half furnace body and the upper half furnace body; The furnace ceiling and the left and right furnaces are suspended from above, with a transmission gap having a height that does not impede the transmission between the upper end surface of the lower half of the furnace side wall of the upper furnace. The upper half of the upper furnace body is formed by integrally forming the upper half of the side wall of the lower furnace. A lower furnace half body of a lower stage furnace, which is provided between the end face and the lower half of the furnace bottom and the left and right furnace side walls, is integrally formed. Stage firing furnace. 2. The two-stage firing furnace according to claim 1, wherein the conveyance means is a cylindrical porcelain conveyance roller. 3. The two-stage firing furnace according to claim 1, wherein the conveying means is a porcelain conveying hanging plate having an I-shaped longitudinal section. 4. The lower half of the upper furnace, which is formed by integrally forming the bottom of the furnace and the lower half of the left and right furnace side walls; The upper half of the lower furnace, which is formed by integrally forming the upper half of the furnace side wall, and the left and right outer sides of the lower half of the upper furnace are located at approximately the same height as the upper end of the lower half of the furnace side wall. While moving along the lower half of the furnace side wall, it returns along the upper half of the furnace side wall at approximately the same height as the lower end of the upper half of the furnace side wall on both left and right outer sides of the upper half of the furnace body of the lower furnace. one endless chain on each side stretched so that The left and right ends are gripped, and as the endless chain is driven synchronously, the upper and lower furnaces are moved directly above the lower half of the upper furnace and directly below the upper half of the lower furnace. A conveyance means made of a heat-resistant material, which is conveyed in the longitudinal direction, and whose length dimension between both ends is longer than the width dimension of the lower half furnace body and the upper half furnace body, and an extent that does not impede the conveyance of the conveyance means. The furnace ceiling and the upper halves of the left and right furnace side walls, which are suspended from above, are integrated by providing a transmission gap with a height dimension of . A conveying gap having a height dimension that does not impede the conveyance of the conveying means is provided between the upper half furnace body of the upper furnace configured as shown in FIG. In this way, the lower half furnace body of the lower furnace, which is arranged below and is integrally formed with the furnace bottom and the lower half of the left and right furnace side walls, and the endless chain on either the left or right side of the chucking means. a planetary device consisting of a chain sprocket formed in a chucking means provided in the endless chain; and a second chain disposed around the entire circumference of the endless chain or a part thereof and in a differential relationship with the planetary device. A two-stage firing furnace characterized by comprising a solar device.