JPS6190908A - Roller for sintering zone and sintering furnace - Google Patents

Abstract

PURPOSE:To prevent a transfer roller which is used in a sintering furnace for tile bodies, from being broken and to make it possible to replace the roller with new one without lowering the inside temperature of a furnace, by coating the outer periphery of a core metal formed of a heat-resistant steel pipe, with a silica alumina group fiber layer. CONSTITUTION:A transfer roller 11 for a sintering zone is formed such that the outer peripheral surface 12a of a core metal 12 formed of a heat-resistant steel pipe core, excepting both end parts thereof, is coated with a fiber layer 13 which is made of silica alumina group fibers having a diameter of about 2-3mum and a length of 40-250mm and made entangled together, and which have a bulk ratio of about 60-200kg/m<3> and a heat conductivity of about 0.18 kcal/mh deg. C at a temperature of about 1,000 deg.C. This roller 11 is jouranlled to a link plate 21a in an endless link chain 21 by means of a roller holding means 25. With this arrangement, a rise in the temperature of the core metal 12 is restrained by the fiber layer 13, and therefore, it is possible to eliminate the necessity of cooling within a predetermined dwelling time. Further, due to the use of the heat-resistant steel, it is possible to prevent the roller from being broken.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a conveyance roller used in a firing furnace for firing objects to be fired, such as tile bases, and a firing furnace using this conveyance roller.

[Configuration and problems of conventional example] As shown in FIG.
roller support 5.6 inserted and arranged on the outside of the furnace body 2.
The end of the porcelain roller 4 is attached to the porcelain roller 4, and the drive chain 7 is engaged with the chain sprocket 5a attached to the roller support 5 to drive the porcelain roller 4 at a predetermined rotational speed.
It is configured to transport. However, the firing furnace 1 using the porcelain roller 4 had the following drawbacks.

(2) The porcelain roller 4 has low bending strength and low impact strength, so it breaks extremely easily. Therefore, in the conventional firing furnace 1, accidents frequently occur in which the porcelain roller 4 is damaged, and once the porcelain roller 4 is damaged, the operation is stopped to prevent the object 8 to be fired from falling off from the missing part of the porcelain roller 4. Production efficiency was poor as production had to be interrupted.

@ Damaged porcelain 0-ra (not shown) or glaze 9 on the surface
When replacing the porcelain roller 4' with the adhesion to a new porcelain roller 4, remove the roller support 6 from the bracket 10, pull out the porcelain roller 4 to the outside of the furnace body 2, and insert the new porcelain roller 4 into the insertion hole. 3.3, then attach the roller support 6 to the bracket 10 and connect the porcelain 0-ra 4.
It requires a lot of effort to attach both ends of the roller to the roller supports 5 and 6. Therefore, the conventional structure of the firing furnace 1 has the drawback that it requires a lot of effort and time to replace the porcelain rollers 4, 4, . . . .

Taking out the porcelain roller 4' arranged in the firing zone where the O concentration in the furnace is at a high temperature of 1100 to 1300 degrees out of the furnace at a low temperature, and inserting a new porcelain roller 4 at a low temperature into the furnace at a high temperature. This is not preferable because the porcelain roller 4' (4) is rapidly cooled or heated. Therefore,
When replacing the porcelain roller in the high-temperature firing area, it is necessary to cool down the temperature inside the furnace before replacing the porcelain roller 4' (4).
cannot be exchanged. Therefore, the conventional firing furnace 1 required a long time to cool down and raise the temperature of the firing zone, and as a result, there was a drawback that the down time was long and the operating efficiency was reduced.

■ The conventional firing furnace 1 consists of rotating porcelain rollers 4.4...
In order to convey the objects to be fired 8.8..., the alignment of the objects to be fired 8. .8...
- They collide with each other and are damaged, and the connection to the unloader (not shown) on the exit side of the firing furnace 1 cannot be made smoothly.

[Object of the Invention] In order to solve the above-mentioned drawbacks, the present invention provides a conveyor roller for a firing belt that does not break, a roller that can be easily and quickly replaced without any temperature drop in the furnace, and a method that allows for the alignment of objects to be fired. The purpose of the present invention is to provide a firing furnace that can be transported without disturbing its condition.

[Configuration of the Invention] The gist of the first invention is that, in a roller used in the firing zone of a firing furnace, the outer periphery of a core made of a heat-resistant steel pipe is covered with a silica-alumina fiber layer.

With this configuration, the baking belt conveying roller has increased bending strength and impact strength, and does not break.

The gist of the second invention is to provide a furnace body consisting of an upper furnace wall body and a lower furnace wall body that sandwich a roller passage along the conveyance direction of the object to be fired from both upper and lower sides, and to convey objects to be fired to the left and right outside of the furnace body. A transmission means is formed by synchronously driving endless chains stretched in each direction, and the outer periphery of a core metal made of a heat-resistant steel pipe is coated with a silica-alumina 1111, N layer, and the endless chain is connected to the core. Both ends of the gold are removably attached, and the roller passes through the roller path as the endless chain is driven. It consists of a conveyor roller for the belt.

With this configuration, replacement and maintenance inspection of the firing belt conveyor roller can be performed easily and quickly outside the furnace, and the objects to be fired are aligned by the firing belt conveyor roller that moves inside the furnace without rotating. Transported without disturbing the condition.

[Description of Embodiments] □The present invention will be described below based on embodiments shown in the drawings. In the following description, the front refers to the left side of Figures 1 and 4 to 6, the rear refers to the right side of the same figures, and the right refers to the right side of Figures 2 and 3 (Al (Bl) , left refers to the left side of the same figure.

Reference numeral 11 in FIGS. 2 and 3 IA) (El) shows an embodiment of the baking belt conveyance roller according to the present invention. The baking belt conveying roller 11 has a core metal 12 made of a heat-resistant steel tube, and its outer periphery 12a, excluding the areas near both ends, is coated with silica/alumina fiber I.
! It is coated with 113. The core metal 12 is made of N-layer -Or type heat-resistant steel (for example, 5uS310S), and has an outer diameter of 25m1! A material having a thickness of about 1φ and a wall thickness T1 of about 3 to 4Il1m is used. The fiber layer 13 is made by intertwining silica-alumina fibers with a diameter of 2 to 3 μm and a length of 40 to 250III, and has a bulk specific gravity of 60 to 200Se+1/m".
The thermal conductivity is 0.18 Kd/mh' at 1000℃
The layer thickness T2 is approximately 10 to T5 mm. The fiber layer 13 is coated by, for example, fitting a cylindrical molded product made of silica/alumina fiber onto the core bar 12 .

FIG. 1 is a side view with the middle omitted, showing an embodiment of a firing furnace 14 according to the second invention, and FIG. 2 is an enlarged sectional view of the same. The furnace body 15 is divided into several sections along the front-rear direction, which is the direction in which the objects to be fired are conveyed, and each section consists of an upper furnace wall body 16 and a lower furnace wall body 17, and a roller passage A along the front-rear direction.
(see Fig. 2) are sandwiched between shutter walls 16 and 17. The lower furnace wall 17 is placed on a lower cross beam 18a (see FIG. 2) of a strongly framed frame 18. On the other hand, the upper furnace wall 1G is suspended from the upper cross beam 18b of the frame 18 (see FIG. 2) at the center thereof in a height-adjustable manner, and at both sides thereof It is connected to brackets 18e, 18e so that its height can be adjusted freely.

Conveying means 20.20 are disposed on both left and right outer sides of the furnace body 15 along the front-rear direction. Each transmission means 20 is
The endless chain 21, the inverted chain sprockets 22, 22..., and the longitudinal beams 18c, 1 of the frame 18
It consists of a chain guide rail 23 (see Fig. 3 (8) B) and Fig. 6) attached to 8c' and a chain drive motor 24 (see Fig. 1), which synchronizes the left and right endless chains 21 and 21. configured to drive.

In addition, if the endless chain 21.21 breaks down while being driven, the left and right reversing sprockets 22.22 arranged on the carry-in side F are braked by a drive motor or brake having braking characteristics, and the carry-in is carried out. Appropriate pack tension is applied to the chain 21.21 between the side F and the delivery side E to tighten it so that the endless chain 21.21 is smoothly driven. The endless chain 21
．． 21, as shown in FIG. 3 PJ(B), there is an O-receptor equipped with a plurality of sets of chucks 26 and 27 mounted opposite each other at an appropriate pitch P (see FIG. 4) along the front-rear direction. A retaining means 25 is attached. The right chuck 26 constituting the roller holding means 25 is attached to the link plate 21a of the endless chain 21, as shown in FIGS. 3 and 4.
, 21a, and a bearing 28.28 attached to the bearing 28.
The hollow shaft 29 supported by the bearing 28, 28 (7
), a guide roller 30 rotatably fitted onto the hollow shaft 29, a chuck head 31 slidably fitted onto the left end of the hollow shaft 29, a retaining ring 32 fitted onto the hollow shaft 29, and a chuck head 31. It consists of a compression coil spring 33 fitted onto the hollow shaft 29 between the two, and a square cam plate 34 and a pinion 35 fitted onto the hollow shaft 29 to prevent rotation.

Also, the left chuck 2 constituting the roller holding means 25
7, as shown in FIG. 3(B), similarly to the chuck 26, a bearing 28, 28, a hollow shaft 29', and a guide roller 3 are provided.
0, and a chuck head 31' is fixed to the left end of the hollow shaft 29/. A roller guide rail 41 is installed on each of the left and right longitudinal beams 18d, 18d of the frame 18 in parallel with the chain guide rail 23, and guides the guide rollers 3 (1, 30) to each chuck 26. The hollow shafts 29 and 29' of 27 are arranged to maintain a horizontal state.
As shown in the figure, a longitudinal beam 18c on the right side of the frame 18,
A cam guide rail 42 that guides one side of the rectangular cam plate 34 is laid over the entire endless chain tension area 18c'. The roller holding means 25 configured as described above is attached to each pair of chucks 26, 27 in a removable manner.
is conveyed through the roller passage A as the endless chain 21.21 is driven.

As shown in the third image and FIG. 5, seal plates 36 are fitted into the core metals 12 on the left and right sides of the adjacent baking belt conveyance rollers 11, 11, respectively, as necessary. This is to prevent hot air inside the furnace from leaking out of the furnace from both sides of the roller passage A. The seal plates 36, 36, . . . are configured to pass through seal plate passages B formed at the outer edges of the upper and lower furnace walls 16, 17.

A chuck 20°27 constituting the roller holding means 25
As shown in FIG. 3 W (El), forced cooling means 37 for cooling the baking belt conveyance rollers 11, 11, .

The forced cooling means 37 includes shaft # openings 29a, 29a of the hollow shafts 29, 29, . . . that constitute the right chuck 26.
A cooling gas supply chamber 38 with a nozzle 38a opening to eject cooling gas toward... and a right chuck 27.
It consists of a suction chamber 39 that sucks cooled high-temperature gas from the shaft end openings 29'a, 29'a, . . . of the hollow shafts 29', 29', . The suction chamber 39 has a seal plate passage C formed therein and an adjacent hollow shaft 29/.

The externally fitted seal plates 40 are guided toward the shaft ends of the shafts 29' to prevent outside air from being sucked into the suction chamber 39. Note that -1 the installation area of the forced cooling means 37 is as follows:
The firing belt or the like is such that the core metal 12 of the firing belt conveying roller 11 has a temperature equal to or higher than the allowable temperature.

FIG. 6 is a side view showing a reversing mechanism 43 provided as necessary to reverse the fired body transport roller 11, which is slightly curved due to heating of the firing zone, during transport outside the furnace. The reversing mechanism 42 rotates the binion 35 of the chuck 26 by 180
A rack 44 with the effective length necessary to rotate the longitudinal beam 1
8d', and a notch 42a is formed in the cam guide rail 42 so as not to prevent the rotation of the cam plate 34. is engaged with the rack 44 and the hollow shaft 2
9 is inverted 180 degrees.

[Function] The baking belt conveying roller 11 of the first invention is made of silica-alumina fiber! ! 13 suppresses the temperature increase of the core metal 12 made of heat-resistant steel pipe. Therefore, when passing through a firing zone where the temperature is higher than the permissible temperature of the core metal 12, if the residence time in the firing zone is less than a predetermined time, No cooling of the core metal 12 is required. In addition, even if the retention time in the firing zone is longer than the predetermined time, the firing belt conveying roller 11 does not move the core metal 12
By passing cooling gas through the hollow portion, the temperature can be maintained below the permissible temperature. Furthermore, since the core metal 12 of the baking belt conveying roller 11 is made of a heat-resistant steel tube, it has very high bending strength and impact strength and will not break under normal use conditions.

The firing furnace 14 according to the second aspect of the present invention includes a firing belt conveying row 511 that passes through the carry-in side. -11... The object to be fired (not shown), such as a tile base placed on top, is conveyed by the moving one-firing zone conveyor O-ra 11, 11..., and the temperature is raised in the furnace. It is fired while passing through the furnace and carried out of the furnace.If glaze or the like adheres to the conveying surface of the firing belt conveying rollers 11, vi... and the object to be fired cannot be conveyed smoothly, , the conveying means 20.20 is intermittently moved to the carry-in side F or the discharge side E at a speed that does not have a thermal effect on the firing belt conveying roller 11.Next, as the conveying means 20 moves, it is moved out of the furnace. Replace the firing belt conveying roller 11 that came out with a new one.

[Effects of the Invention] The baking belt conveying roller according to the first invention has the following excellent effects.

■ Due to its high bending and impact strength, it will not break under normal usage conditions. Therefore, it is possible to eliminate the accidents in which the objects to be fired l112 fall, which have occurred frequently in the past, and to dramatically improve production efficiency.

■ If the conveying surface becomes contaminated with glaze, it can be regenerated by simply replacing the inexpensive fiber layer, reducing firing costs.

The firing furnace according to the second invention has the following excellent effects.

■ Since the objects to be fired are transported by a non-rotating firing belt conveyor roller, the objects to be fired can be transported without disturbing the alignment of the objects, and the connection to the unloader at the outlet side of the firing furnace can be made smoothly.

■ As the conveying means is driven, the firing belt conveyor roller passes outside the furnace, and the firing belt conveyor roller is detachably held by the roller holding means, so the firing belt conveyor roller cannot be replaced before the furnace. It can be done easily and quickly outside.

(2) Since the firing belt transport roller can be replaced without lowering the temperature inside the furnace, the time required to lower the temperature inside the furnace, which was conventionally required, is omitted, and the operating efficiency of the firing furnace can be improved.

■ It is possible to easily predict when to replace the firing belt conveying roller by simply monitoring the firing belt conveying roller passing outside the furnace.

(2) Due to the synergistic effect of (1) to (2) above, it becomes possible to quickly replace the conveying roller for the firing belt, and the operating efficiency of the firing furnace can be dramatically improved.

[Brief explanation of the drawing]

1 to 6 show an embodiment of the firing furnace according to the present invention, in which FIG. 1 is a side view with the middle omitted, FIG. 2 is an enlarged sectional view taken along line II-II, and FIG. Figures (8) and (B) are enlarged cross-sectional views showing the installed state of the conveying roller for the baking circular belt, Figure 4 is a front view of the hole in Figure 3 taken along line IV-IV, Figure 5 is a
The figure is a sectional view taken along the line v-v in Fig. 3, Fig. 6 is an enlarged view showing the reversing mechanism for the conveying roller for the baking belt, and Fig. 7 is a cross-sectional view with the middle omitted showing the main parts of a conventional baking furnace. It is. 11... Conveyance roller for baking belt 14... Firing furnace 1
5 Furnace body 16 Upper furnace wall 17 Lower furnace wall 20 Conveying means 25 Roller holding means 26.27 Chuck A Roller passage patent Applicant: Representative of Ina Seito Co., Ltd. Patent attorney: Toshihiko Uchida Procedural Report (spontaneous) February 14, 1985 1 Indication of the case Japanese Patent Application No. 59-212337 2 Title of the invention Conveyance roller for firing band and Firing Furnace 3 Relationship with the person making the amendment Patent applicant location Koie Honmachi 3-6, Tokoname City, Aichi Prefecture Trial site name (047) Ina Seito Co., Ltd. Representative Representative Director Teru Ina 34 Agent Osaka City 1-2-2-2-1200 Umeda, Kita-ku Target of amendment (1) Full text of the specification (2J Drawing attached to the application 6 Contents of amendment (1) The entire text of Mei aS is amended as shown in Attachment 1. ('2J In the figure) "Figure 1" is corrected as shown in Figure 1 shown in Attachment 2-1. (3) "Figure 2" in the figure is corrected as shown in Figure 2 shown in Attachment 2-1. (4) In the figure "Figure 3 (Al(B)J shown in Attachment 2-2 Figure 3 ^ [Corrected as shown in Bl. 7 List of attached documents (1) Full text correction details!! (Attachment 1) 1
[2] Drawings (Attachment 2-1. Attachment 2-2)
Specification 1, Name of the invention: Conveying roller for firing belt and firing furnace 2, Claim 1: In a roller used for the firing belt of the firing furnace, the outer periphery of the core metal made of a heat-resistant steel pipe is made of silica-alumina-based material. A conveyor roller for a baking belt, characterized in that it is covered with a fiber layer. A firing furnace characterized in that the left end and the right end are gripped by each chucking means, and an upper half made of a core metal made of heat-resistant steel and the outer periphery of which is made of silica and aluminum. 3. Detailed Description of the Invention [Industrial Application Field] The present invention relates to a conveyance roller used in a firing furnace for firing objects to be fired, such as tile bases, and a firing furnace using this conveyance roller. [Prior art and its problems] Conventional firing furnaces include a furnace body that has a tunnel-like structure or a long cylindrical structure that is integrally formed of refractory bricks, etc., and an appropriate space between both side walls of the furnace body. It consists of a large number of rollers for conveying the material to be fired, which are inserted through a large number of insertion holes drilled in the furnace body. It did not move in the longitudinal direction. If the above-mentioned firing furnace is illustrated in cross section, it is as shown in FIG. That is, the conventional firing furnace 1 has left and right furnace walls 2a, 2b of the furnace body 2.
Then, porcelain conveying ports 54 are inserted one by one into a large number of through holes 3, 3 that are bored at appropriate intervals along the longitudinal direction of the furnace walls 2a, 2b, and both ends of each conveying roller 4 are inserted. are attached to roller supports 5.6 disposed on the left and right outer sides of the furnace body 2, respectively. A plurality of roller supports 5 disposed on either side are attached with drive transmission shafts coaxially corresponding to the respective conveyance rollers 4, and each drive transmission shaft has a plurality of chain sprockets 5a. A common drive chain 7 is meshed with these many chain sprockets 5a. By driving the drive chain 7, all the conveyance rollers 4 can be rotated around the drive transmission shaft at a predetermined rotational speed via the chain sprockets 5a, 5a, . . . provided on the drive transmission shaft. Therefore, the object to be fired 8 placed on the conveyance roller 4 is sequentially conveyed to the −) conveyance roller 4, thereby making it possible to convey the object to be fired 8 into the furnace. However, the firing furnace 1 having such a structure had the following drawbacks. ■ Conveyor 0-ra 4' with glaze 9 etc. attached to the roller surface
It is necessary to replace the conveyor roller 4 with a new one, but this work requires a lot of effort and time. First, in order to pull out the dirty conveyance roller 4/ from the insertion holes 3, 3, the roller support 6 must be removed from the bracket 10. Next, insert a new conveyor roller 4 into the insertion hole 3,
3 and attach the tip to the roller support 5. Further, the other end is attached to the roller support 6, and the roller support 6 is fixed to the bracket 10. By the way, many conveyance rollers are arranged in the firing furnace, and the above-mentioned work is necessary for each conveyance roller. In particular, the conveyor rollers that need to be replaced, which are covered with glaze, are usually located in high-temperature firing areas where it is difficult to work, and the number of such rollers is extremely large.
(usually 400 to 500 or more), the effort and time required to replace them is enormous. ◎ In addition, the conveying roller 4', which is disposed in the high-temperature firing area of the firing furnace and has a high temperature of 1,100 to 1,300°C, cannot be pulled out from the insertion holes 3, 3 as described above. Since there is a large temperature difference between the temperature outside the furnace and the temperature outside the furnace, rapid cooling can cause damage or cracks. Furthermore, when a new conveyor port 54 is inserted into the a-temperature firing area of the firing furnace, similar problems occur due to rapid heating. Therefore, before actually replacing the conveyance rollers, prepare in advance by sufficiently lowering the temperature inside the furnace in the high-temperature firing area so that the conveyance rollers that have been handled or newly inserted will not be damaged by heat shock. This cannot be carried out unless you do so. However, it is obvious that if the temperature inside the furnace in the high-temperature firing zone becomes lower than a predetermined temperature, the operation of the firing furnace cannot be continued. Therefore, in conventional firing furnaces, it is necessary to stop the operation for a long time every time the conveyance roller is replaced, and the operating efficiency of the furnace itself has to be extremely low. (2) The porcelain conveying roller 4 has low bending strength and low impact strength, so it breaks extremely easily. If a breakage accident of the conveyor roller 4 occurs during operation of the firing furnace, the broken conveyor opening, -ra 4
will fall to the bottom of the furnace and the conveyance roller will be chipped at that location.If the firing furnace continues to operate as it is, the object to be fired 8 that has been conveyed to the location where the conveyance roller is missing will be Either it is not sent any further and stagnates there, or it falls to the bottom of the furnace through the gap where the conveyance roller is missing. Therefore, in the past, it was necessary to stop the operation of the firing furnace and install a new conveyance roller every time a conveyance roller breakage accident occurred, resulting in extremely poor production efficiency. ■ The porcelain conveyor roller installed in the firing furnace rotates around its own axis to send out the object to be fired 8 placed on it. Even if the objects to be fired 8, 8, etc. are aligned and placed on the conveyor rollers at the entrance of the furnace, a problem occurs between the surface of the conveyor roller 4 and the back surface of the object to be fired 8 during conveyance. Due to the slip, the alignment of the objects to be fired 8.8... is disturbed, and the objects to be fired 8 may collide with each other and be damaged.
At the outlet of the firing furnace, there was a problem in that it took time and effort to align and transfer the materials to an unloader (not shown). [Object of the present invention] The first object of the present invention is to provide a new conveyor for a firing belt which has greatly improved bending strength and impact strength compared to porcelain wax, and which has sufficient heat resistance for practical use. Our goal is to provide rollers.゛ A second object of the present invention is that the conveyance roller can be replaced without reducing the furnace temperature, especially the furnace temperature in the high-temperature firing area, and that the conveyance roller replacement work is easy. However, the object of the present invention is to provide a new kiln that can be completed within an extremely short period of time. A third object of the present invention is to provide a novel firing furnace in which the alignment of the objects to be fired is not disturbed even when they are transported through the furnace. [Structure of the Invention] The gist of the first invention is for use in a firing zone of a firing furnace. , 60-A, the outer periphery of a core made of a heat-resistant steel pipe is covered with a silica-alumina llilt layer. With this configuration, the conveying roller has increased bending strength and impact strength, and does not break. The gist of the second invention is to provide a lower half furnace body of a firing furnace in which a furnace bottom portion and lower half portions of left and right furnace side walls are integrally constructed of refractory bricks, etc.; The left and right rails are stretched so as to move along the lower half of the furnace side wall at approximately the same height as the upper end of the lower half of the side wall, and return along the lower half of the furnace side wall at a position lower than the bottom of the furnace. One endless chain each, driving means for driving both endless chains in synchronization with each other, chucking means attached at regular intervals to each of the endless chains, and left and right ends of each of the left and right chucking means. is gripped, and the outer periphery of the core metal made of heat-resistant steel pipe is coated with 111ftN of silica/alumina! a conveyor roller whose length between both ends is longer than the width of the lower furnace half; and the conveyor. - A gap with a height dimension that does not impede the transmission of heat is provided between the upper end surface of the lower half of the furnace side wall, and a refractory brick, etc. The upper half of the furnace side wall is integrally formed with the upper half of the furnace. With this configuration, the replacement and maintenance inspection of the conveyor roller can be performed easily and quickly outside the furnace, and the alignment of the objects to be fired is not disturbed by the conveyor rollers that move inside the furnace without rotating. [Description of Embodiments] Hereinafter, the present invention will be explained based on embodiments shown in the drawings. In the following description, "front" refers to FIGS. 1, 4 to 6. "Back" refers to the right side of these figures. "Right" refers to the left side of Figures 2 and 3.
3), and "left" refers to the left side of these figures. 2 and 3 show an embodiment of a conveyor roller for a firing zone according to the present invention. The baking belt conveyor roller 11 has a core metal 12 made of a heat-resistant steel tube whose outer periphery 12a, except for both ends, is covered with a silica-alumina fiber lit layer 13. The core metal 12 is made of Ni-Qr heat-resistant steel (for example, 5US310S), and has an outer diameter of 25avφ.
A material with a wall thickness T1 of about 3 to 41 is used. The fiber layer 13 has a diameter of 2 to 3 μm and a length of 40 to 250++
Thermal conductivity is 1000℃ with a bulk specific gravity of 60 to 200kg/♂ by intertwining ++++ silica/alumina fibers.
It consists of about 0.18 Kcal/lh'c,
The layer thickness T2 is about 10 to 15 mm and aI! The fiber layer 13 is coated by, for example, fitting a cylindrical molded product made of silica-alumina-based materials onto the core metal 12. FIG. 1 is a side view with the middle omitted, showing an embodiment of a firing furnace 14 according to the second invention, and FIG. 2 is an enlarged sectional view of the same. The furnace body 15 is divided into several sections along the front-rear direction, which is the direction in which the objects to be fired are conveyed, and each section is made of refractory bricks or the like, and includes a furnace ceiling 16a and upper halves 1 of the left and right furnace side walls.
6b and 16b are integrated into a lower half furnace body 16;
It also consists of a lower half furnace body 17 made of refractory bricks or the like, and a furnace bottom portion 17a and lower half portions 17b of left and right furnace side walls. Between the lower half furnace body 16 and the lower half furnace body 17, a conveyance roller 11 whose length between both ends is longer than the width dimension of the lower half furnace body 17 is disposed horizontally, and the movement of the conveyance roller 11 is A gap of unobstructed height dimension is provided. This gap is continuous in the front-rear direction, which is the direction in which the object to be fired (not shown) is transported, thereby forming a transport roller path A. Lower furnace body 1
7 is a lower cross beam 18 of a frame 18 that is strongly framed.
a (see Figure 2). On the other hand, the upper half furnace body 16 has a frame 18 near its center.
The frame 18 is suspended from an upper cross beam 18b (see FIG. 2) in a height-adjustable manner, and both sides are connected to brackets 18e, 18e of the frame 18 in a height-adjustable manner. A transmission mechanism 20.20 is disposed on the outside of the left and right corners of the furnace body 15 along the front-rear direction. Each transmission mechanism 20 is
Endless chain 21, reverse chain sprocket 22, 22..., and longitudinal beam 18C11 of frame 18
Upper and lower chain guide rail 2 attached to 8C'
3 (see FIG. 3 IAI(B) and FIG. 6) and a chain drive motor 24 (see FIG. 1), and is configured to drive left and right endless chains 21, 21 synchronously. In addition, the endless chain 21.2
1 becomes out of order during driving, although not shown in the figure, by braking the left and right reversing sprockets 22 and 22 arranged on the carry-in side F with a drive motor or brake having braking characteristics, the carry-in side F and the carry-out side Appropriate back tension is applied to the endless chain 21.21 stretched between sides E to tension it, so that the endless chain 21.21 is smoothly driven. The endless chain 21.21 has a third diagram (1
As shown in 31, chucking means 26 are mounted oppositely.
．． A conveyance roller holding mechanism 25 having a plurality of sets of 27 is installed at appropriate intervals P (see FIG. 4) along the front-rear direction. As shown in the third diagram and FIG.
, 21a, and the bearing 28,
A hollow shaft 29 is pivotally supported by a hollow shaft 28, and a guide rod 03 is rotatably fitted onto the hollow shaft 29 between the bearings 28 and 28.
0, a chuck head 31 slidably fitted to the left end portion of the hollow shaft 29, a compression coil spring 33 fitted between the chuck head 31 and a retaining ring 32 fitted onto the hollow shaft 29, It consists of a square cam plate 34 and a pinion 35 fitted onto the hollow shaft 29 to prevent rotation. In addition, the left chucking means 2 constituting the conveyance roller holding mechanism 25
7, as shown in FIG. 3(B), is equipped with bearings 28, 28, a hollow @ 29', and a guide roller 30' like the chucking means 26, and also has a chuck head 31/30 at the left end of the hollow shaft 29'. It is constructed by fixing it. Further, roller guide rails 41 are installed on each of the left and right longitudinal beams 18d, 18d of the frame 18 in parallel with the chain guide rail 23, and guide the guide rollers 30, 30 to each chucking means 26. .27 hollow shaft 29.2
9' maintains a horizontal state. Also, the third
As shown in FIGS. 4 and 6, the right longitudinal beams 18c and 18c' of the frame 18 are provided with guides for guiding the upper or lower sides of the rectangular cam plate 34 over the entire circumference of the endless chain 21. A cam guide rail 42 is provided. Conveyance roller holding mechanism 25 configured as described above
The cylindrical conveyance rollers 11, 11, which are detachably attached to each set of chucking means 26.27, are moved to the conveyance roller path A as the endless chain 21.21 is driven. along the length of the kiln. Furthermore, as shown in the third diagram (5) and FIG. This is to prevent hot air inside the furnace from leaking out of the furnace from both sides of the conveyance roller passage A. The seal plate 36.36・
. . is the upper half furnace body 16. It is configured to pass through a seal plate passage B formed at the outer edge of the lower half furnace body 17. Chucking 1 constituting the conveyance roller holding mechanism 25
On the outside of the means 26.27 there is shown in Figure 3 N (B) - reference 3.
As shown at 7, the baking belt conveying roller 1 is in a high temperature state.
1, 11. A forced cooling means 37 for cooling the - is provided as necessary. The forced cooling means 31 is
Hollow shaft 29.29 constituting the right chucking means 26
The cooling gas supply chamber 38 has a nozzle 38a that spouts cooling gas toward the shaft end openings 29a, 29a, etc., and the hollow shafts 29', 29' forming the left chucking means 27. - shaft end opening 29
'a, 29' a-- It is composed of a suction chamber 39 that sucks cooled high-temperature gas from . A second seal plate passage C is formed in the suction chamber 39, and the seal plates 40 fitted on the outside are guided toward the shaft ends of the adjacent hollow shafts 29' and 29', thereby opening the suction chamber 39.
This is to prevent outside air from being sucked into the furnace. Note that the forced cooling means 37 is installed in a firing zone or the like where the core metal 12 of the firing zone conveying row 511 has a temperature equal to or higher than an allowable temperature. In addition, FIG. 6 shows that the conveying roller 11 for the firing zone, whose core metal 12 is slightly curved due to the heating of the firing zone, is rotated as necessary in order to reverse the conveyance roller 11 for the firing zone during the return path from the furnace after the conveyance of the object to be fired is completed. FIG. 4 is a side view showing a reversing mechanism 43 provided therein. The reversing mechanism 43 rotates the pinion 3 of the chucking means 26.
Rack 44 with the effective length necessary to rotate 5 by 180 degrees
is arranged on the longitudinal beam 18d', and the cam guide rail 4
2 is formed with a notch 42a for not blocking the rotation of the rectangular cam plate 34, and as the endless chain 21 is driven, the object to be fired is being moved in the direction of the arrow G below the furnace body after the conveyance of the object to be fired is completed. The pinion 35 is engaged with the rack 44 to invert the hollow shaft 29 by 180 degrees. [Function] The baking belt conveying roller 11 of the first invention is made of silica-alumina fiber! The temperature rise of the core metal 12 made of a heat-resistant steel pipe is suppressed by the heat insulating action of the metal core 113. Therefore, when passing through a firing zone where the temperature is higher than the permissible temperature of the core metal 12, if the residence time in the firing zone is less than a predetermined time, No cooling of the core metal 12 is required. In addition, even if the retention time in the firing zone is longer than the predetermined time, the firing zone conveying row 511 can move the core metal 12
By passing the cooling gas through the hollow part, the temperature can be maintained above the permissible temperature. Furthermore, a baking belt conveying roller 1
1, since the core bar 12 is made of a heat-resistant steel tube, its bending strength and impact strength are very high, and the firing furnace 14 according to the invention does not fold under normal usage conditions.
Rollers 11, 11... Conveying rollers 11, which move objects to be fired (not shown) such as tile substrates placed on them.
11..., and while passing through the heated furnace, it is fired and transported out of the furnace. If the conveyor roller 11°11・
If glaze or the like adheres to the conveyance surface of the conveyance surface and the object to be fired cannot be conveyed smoothly, move the conveyance mechanism 20. 11 intermittently at a speed that does not have a thermal effect. Next, the endless chain 21°. The conveyance roller 11 that has come out of the furnace as the chain 21 moves is replaced with a new one while the endless chain 21.21 is stopped. [Effects of the Invention] The baking belt conveying roller according to the first invention has the following features: (1) Since the core metal is a heat-resistant steel pipe, it has high bending strength and impact strength, and does not break under normal use conditions. Therefore, the accident of falling off of the objects to be fired, which has occurred frequently in the past, is completely eliminated, and production efficiency can be dramatically improved. ■ If the conveying surface becomes contaminated with glaze, it can be easily regenerated by simply replacing the inexpensive fiber layer.□
Therefore, costs can be reduced. □Book 2
The firing furnace according to the invention has the following excellent effects. ■ Since the objects to be fired are transported by a conveyor roller that does not rotate, it is possible to transport the objects to be fired without disturbing the alignment of the objects, and the connection to the unloader on the exit side of the firing furnace can be easily performed. ■ The conveyor roller passes outside the furnace as the endless chain is driven, and the conveyor roller is detachably held in the conveyor roller holding mechanism, so the conveyor roller can be replaced easily and quickly outside the furnace. . (2) Since the conveyance rollers can be replaced without any temperature drop inside the furnace, the time required for cooling the furnace interior, which was conventionally required, is omitted, and the operating efficiency of the firing furnace can be improved. ■ By simply monitoring the conveyance rollers passing outside the furnace, it is possible to easily predict when the conveyance rollers will need to be replaced. (2) Due to the synergistic effect of (1) to (2) above, it is possible to quickly replace the conveyance rollers, and the operating efficiency of the firing furnace can be dramatically improved. 4. Brief description of the drawings Figures 1 to 6 show an embodiment of the firing furnace according to the present invention, in which Figure 1 is a side view with the middle omitted, and Figure 2 is a view taken along line II-II of the same. Enlarged cross-sectional view, Figure 3 (At(Bl)
is an enlarged cross-sectional view showing the installed state of the conveyor roller for the baking circular belt,
Figure 4 is a front view on line IV-IV to Figure 3;
The figure is a sectional view taken along the v-v line in FIG. 3, FIG. 6 is an enlarged view showing the reversing mechanism for the conveyance roller, and FIG. 7 is a cross-sectional view with the middle omitted showing the main parts of a conventional firing furnace. . 11... Conveyance roller for baking belt 14... Firing furnace 1
5... Furnace body 16... Upper half furnace body 1
7...Lower half furnace body 21...Endless chain 25...Conveyance roller holding mechanism 26, 27...Chucking means A...Conveyance roller passage

Claims (1)

[Scope of Claims] 1. A conveyance roller for a firing zone, characterized in that the outer periphery of a core made of a heat-resistant steel tube is covered with a silica-alumina fiber layer, in the roller used for the firing zone of a firing furnace. 2. A furnace body consisting of an upper furnace wall body and a lower furnace wall body sandwiching a roller path along the conveyance direction of the object to be fired from both upper and lower sides, and a furnace body consisting of an upper furnace wall body and a lower furnace wall body that sandwich the roller passage along the direction of conveyance of the object to be fired, and walls extending along the direction of conveyance of the object to be fired on both the left and right outer sides of the furnace body. A transmission means formed by synchronously driving a suspended endless chain;
The outer periphery of a core metal made of a heat-resistant steel pipe is covered with a silica/alumina fiber layer, and both ends of the core metal are removably attached to the endless chain, and the core metal passes through the roller passage as the endless chain is driven. A firing furnace characterized by comprising a firing belt conveying roller.