JP2020143882A - Shutter device of roller conveyance type baking furnace - Google Patents

Abstract

To provide a shutter device of a roller conveyance-type baking furnace capable of suppressing deformation of a shutter case housing a vertical shutter member.SOLUTION: A shutter device S1-S7 of a baking furnace includes a vertical shutter member 48 for opening and closing a space in a furnace body, and a shutter case 76 fixed to the furnace body, housing the vertical shutter member 48, and vertically guiding the same. The shutter case 76 is composed of laminate of a heat insulation plate material CFB laminated in a vertical direction. Thus, thermal deformation of the shutter case 76 housing the vertical shutter member can be suppressed. Thus, interference is generated between the vertical shutter member 48 and the shutter case 76 housing the same, so that diffusion of abrasion powder in the furnace can be solved.SELECTED DRAWING: Figure 5

Description

The present invention relates to a shutter device for a roller-conveying firing furnace that divides the inside of a roller-conveying firing furnace that heat-treats while sequentially transporting a material to be heated in one direction into a plurality of heating regions.

Conventionally, there is known a roller transfer type firing furnace in which the material to be heated is sequentially conveyed by a plurality of horizontal transfer rollers provided so as to penetrate a tunnel-shaped furnace body in the width direction. For example, it is the firing furnace described in Patent Document 1. Such a roller-conveying type firing furnace is called, for example, a roller harsher kiln (RHK).

By the way, in the above-mentioned firing furnace, for example, a shutter member device that divides into a plurality of heating regions such as a degreasing chamber, a preheating chamber, a firing chamber, a slow cooling chamber, and a cooling chamber is provided, and a predetermined atmosphere is maintained. The material to be heated is heat-treated according to the heat profile of. Such a roller transport type firing furnace is used, for example, for gas carburizing treatment.

In the roller transport type firing furnace described in Patent Document 1, the opening / closing door, that is, the upper and lower shutter members are moved up and down in the shutter case via a support shaft by an opening / closing door elevator including a cylinder mechanism arranged on the furnace body. By being driven, the upper and lower shutter members open and close through holes formed through the shutter case.

Japanese Unexamined Patent Publication No. 2008-209060

According to the conventional roller-conveying type firing furnace, the shutter case accommodating the upper and lower shutter members is made of a fibrous heat insulating material made of a ceramic fiber obtained by fiberizing alumina and silica. Such a heat insulating material has high heat resistance and heat insulating properties, is flexible and lightweight, and therefore has high workability and workability, and is inexpensive. However, when the shutter case is composed of the heat insulating material made of ceramic fiber as described above, especially when the temperature difference in the heating region divided by the shutter member is large, thermal deformation occurs and the gap between the upper and lower shutters. There was a problem that the upper and lower shutters and the shutter case accommodating the shutters interfered with each other and the abrasion powder was scattered in the furnace. When such abrasion powder is mixed with the material to be heated, there is a possibility that the problem that the quality of the material to be heated is impaired may be induced.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a shutter device for a roller-conveying firing furnace capable of suppressing deformation of a shutter case accommodating upper and lower shutter members. To do.

The gist of the first invention is a roller transport type firing furnace having a tunnel-shaped furnace body and heat-treating a material to be heated transported by a plurality of transfer rollers penetrating the furnace body in the width direction. A shutter device for a roller-conveying firing furnace that divides the space inside the furnace into a plurality of heating regions in the longitudinal direction of the space, and is driven in the vertical direction and provided with the upper and lower shutter members inside the furnace. A shutter case fixed to the furnace body and accommodating the upper and lower shutter members and guiding the upper and lower shutter members in the vertical direction is included, and the shutter case is composed of a laminated body of heat insulating plate materials laminated in the vertical direction. is there.

The gist of the second invention is that, in the first invention, the laminated body of the heat insulating plate material constituting the shutter case is made of ceramic fibers and frame-shaped heat insulating plate materials bonded to each other by a ceramic bond are laminated. Is to be.

The gist of the third invention is that in the first invention or the second invention, the upper and lower shutter members have a thickness larger than the core spacing of the plurality of transport rollers, and are fibrous heat insulating materials made of ceramic fibers. It is composed of plate materials.

The gist of the fourth invention is that in any one of the first to third inventions, the shutter case has a front wall and a rear wall in which through holes through which the material to be heated passes are formed, respectively. The upper and lower shutters have a pair of side walls connecting both ends of the front wall and the rear wall in the width direction, respectively, and in an accommodation space formed between the front wall and the rear wall and the pair of side walls. The purpose is to accommodate the members so that they can be moved in the vertical direction.

The gist of the fifth invention is that, in the fourth invention, guide rails are extended in the vertical direction on the inner wall surfaces of the front wall and the rear wall of the shutter case, respectively, and the front and rear surfaces of the upper and lower shutter members are provided. Is formed with a concave guide groove into which the guide rail is fitted, and the upper and lower shutter members have an interval smaller than the protrusion dimension of the guide rail from the inner wall surface on the front and rear surfaces of the upper and lower shutter members. It is to be guided in the vertical direction by the guide rail in a state of being separated from the wall surface.

The gist of the sixth invention is that in any one of the first to fifth inventions, the shutter case sandwiches two adjacent transport rollers among the plurality of transport rollers. The shutter case has a thickness dimension that is larger than the distance between the pair of transport rollers located at, and the shutter case has a through hole for passing the two transport rollers in the width direction and the two transport rollers. A pair of concave grooves are formed in order to avoid interference with a pair of transport rollers adjacent to the outside.

The gist of the seventh invention is that in any one of the first to sixth inventions, the upper and lower shutter members are based on the core spacing of a pair of adjacent transport rollers among the plurality of transport rollers. It has a large thickness and a pair of concave grooves formed on the ridges between the lower end opening / closing surface and the front and rear surfaces in order to avoid interference with the transport roller, and is lowered to the closed position. In the state, the lower end opening / closing surface is located between the transport rollers.

The gist of the eighth invention is that, in the seventh invention, the shutter case has a thickness larger than the core spacing of a pair of adjacent transport rollers among the plurality of transport rollers and interference with the transport rollers. The upper and lower shutter members are lowered to the closed position by being positioned between the pair of concave grooves formed on the ridges between the upper end opening / closing surface and the front and rear surfaces and the transport roller in order to avoid the above. In this state, the upper end opening / closing surface of the upper and lower shutter members is brought close to the upper end opening / closing surface, and the fixed shutter member fixed to the furnace body is accommodated in a fixed position.

The gist of the ninth invention is that, in any one of the first to eighth inventions, a pair of support rods protruding downward from the lower end portion of the upper and lower shutter members through the transfer rollers, and the above. It is to include a shutter driving device which is arranged on the lower side of the furnace body and drives the upper and lower shutter members in the vertical direction via the pair of support rods to be positioned at an open position and a closed position.

The gist of the tenth invention is that in the ninth invention, the furnace body is supported by a base frame, and the base frame is a lower frame and a support frame protruding upward from the lower frame. And an upper frame supported by the support column frame and on which the furnace body is placed, and the shutter drive device is provided on the upper frame.

The gist of the eleventh invention is that in the tenth invention, the shutter driving device is fixed to an upper and lower plates to which the lower ends of the pair of support rods are fixed and to the upper frame, and the upper and lower plates are vertically oriented. It is intended to include a vertical direction guide device for guiding the upper and lower frames, and an electric motor with a speed reducer fixed to the upper frame and driving the upper and lower plates in the vertical direction.

According to the shutter device of the roller transport type firing furnace of the first invention, the upper and lower shutter members are driven in the vertical direction and provided in the furnace body, and the upper and lower shutter members are fixed to the furnace body and accommodate the upper and lower shutter members up and down. The shutter case includes a shutter case that guides in the direction, and the shutter case is composed of a laminated body of heat insulating plate materials that are laminated in the vertical direction. From this, it is possible to suppress thermal deformation of the shutter case that houses the upper and lower shutter members. As a result, interference occurs between the upper and lower shutters and the shutter case accommodating the upper and lower shutters, and wear debris is eliminated from being scattered in the furnace.

According to the shutter device of the roller transport type firing furnace of the second invention, the laminated body of the heat insulating plate material constituting the shutter case is made of ceramic fibers and the frame-shaped heat insulating plate material bonded to each other by a ceramic bond is laminated. Therefore, the rigidity of the frame-shaped heat insulating plate material is increased, so that thermal deformation of the shutter case accommodating the upper and lower shutter members is further suppressed.

According to the shutter device of the roller transfer type firing furnace of the third invention, the upper and lower shutter members are plate-like fibrous heat insulating materials made of ceramic fibers having a thickness larger than the core spacing of the plurality of transfer rollers. Since it is composed of the above, high heat insulating property can be obtained, so that the heat insulating performance between the heating regions divided by the upper and lower shutter members can be enhanced, and the temperature difference between the heating regions can be steeply formed. Moreover, the furnace length can be shortened.

According to the shutter device of the roller transport type firing furnace of the fourth invention, the shutter case has a front wall and a rear wall in which through holes for passing the material to be heated are formed, and a width of the front wall and the rear wall, respectively. The upper and lower shutter members are movably accommodated in the accommodation space formed between the front wall and the rear wall and the pair of side walls, each having a pair of side walls connecting both ends in the direction. Will be done. As a result, the heat insulating performance between the heating regions divided by the upper and lower shutter members is enhanced, and the temperature difference between the heating regions can be steeply formed. Moreover, the furnace length can be shortened.

According to the shutter device of the roller transport type firing furnace of the fifth invention, guide rails are extended in the vertical direction on the inner wall surfaces of the front wall and the rear wall of the shutter case, respectively, and the front surface of the upper and lower shutter members and the upper and lower shutter members are provided. A concave guide groove into which the guide rail is fitted is formed on the rear surface, and the upper and lower shutter members are spaced so that the front and rear surfaces of the upper and lower shutter members are smaller than the protrusion dimension of the guide rail from the inner wall surface. It is guided in the vertical direction by the guide rail in a state of being separated from the inner wall surface. As a result, the upper and lower shutter members are moved up and down by the guide rail in a state where the front and rear surfaces of the upper and lower shutter members are separated from the inner wall surface by a distance smaller than the protrusion dimension of the guide rail from the inner wall surface. Since it is guided in the direction, interference between the upper and lower shutter members and the shutter case accommodating the upper and lower shutter members is prevented, and the heat insulating performance between the heating regions divided by the upper and lower shutter members is enhanced.

According to the shutter device of the roller transfer type firing furnace of the sixth invention, the shutter case is a pair of transfer rollers located so as to sandwich two adjacent transfer rollers among the plurality of transfer rollers. The shutter case has a thickness dimension larger than the distance, and the shutter case has a through hole for passing the two transport rollers in the width direction and a pair of transport rollers adjacent to the outside of the two transport rollers. A pair of concave grooves are formed in order to avoid the interference of the above. From this, since the entire upper and lower shutter members can be made of a relatively thick heat insulating material, sufficient heat insulating performance between the heating regions can be obtained, and a temperature difference between the heating regions can be steeply formed. Further, there is an advantage that the distance between the transport rollers can be reduced and a small object to be heated can be stably transported.

According to the shutter device of the roller transfer type firing furnace of the seventh invention, the upper and lower shutter members have a thickness larger than the core spacing of a pair of adjacent transfer rollers among the plurality of transfer rollers and the transfer rollers. The lower end opening / closing surface has a pair of concave grooves formed on the ridges between the lower end opening / closing surface and the front surface and the rear surface, respectively, and the lower end opening / closing surface is said to be in a state of being lowered to the closed position. Located between the transport rollers. From this, since the entire upper and lower shutter members can be made of a relatively thick heat insulating material, sufficient heat insulating performance between the heating regions can be obtained, and a temperature difference between the heating regions can be steeply formed. Further, there is an advantage that the distance between the transport rollers can be reduced and a small object to be heated can be stably transported.

According to the shutter device of the roller transfer type firing furnace of the eighth invention, the shutter case has a thickness larger than the core spacing of a pair of adjacent transfer rollers among the plurality of transfer rollers and the transfer rollers. A pair of concave grooves formed on the ridges between the upper end opening / closing surface and the front and rear surfaces in order to avoid interference, and the upper and lower shutter members are positioned between the transport rollers and the upper and lower shutter members are lowered to the closed positions. In the state of being moved, the upper end opening / closing surface of the upper and lower shutter members is brought close to the upper end opening / closing surface, and the fixed shutter member fixed to the furnace body is accommodated in a fixed position. From this, since the entire upper and lower shutter members can be made of a relatively thick heat insulating material, sufficient heat insulating performance between the heating regions can be obtained, and a temperature difference between the heating regions can be steeply formed. Further, there is an advantage that the distance between the transport rollers can be reduced and a small object to be heated can be stably transported.

According to the shutter device of the roller transport type firing furnace of the ninth invention, a pair of support rods protruding downward from the lower end portion of the upper and lower shutter members and arranged under the furnace body are arranged between the transport rollers. The shutter driving device includes a shutter driving device that drives the upper and lower shutter members in the vertical direction via a pair of support rods to position them in an open position and a closed position. In this way, since the shutter drive device is arranged on the lower side of the furnace body, it is not easily affected by the heat of the furnace body. Therefore, a large-scale cooling mechanism device is used for the shutter drive device that drives the upper and lower shutter members up and down. There is no need to provide.

According to the shutter device of the roller transport type firing furnace of the tenth invention, the furnace body is supported by a base frame, and the base frame is a lower frame and a support column protruding upward from the lower frame. It has a frame and an upper frame supported by the support column frame on which the furnace body is placed, and the shutter drive device is provided on the upper frame. As described above, since the shutter drive device is provided on the upper frame of the base frame, the displacement of the shutter drive device with respect to the upper and lower shutter members is suppressed, so that the shutter member having a relatively low mechanical strength. Consumption is suppressed.

According to the shutter device of the roller transport type firing furnace of the eleventh invention, the shutter drive device is fixed to the upper and lower plates to which the lower ends of the pair of support rods are fixed and the upper and lower frames, and the upper and lower plates are moved up and down. A vertical guidance device for guiding in a direction and an electric motor with a speed reducer fixed to the upper frame and driving the upper and lower plates in the vertical direction are included. As a result, the vertical guidance device and the electric motor with a speed reducer located under the furnace body do not require a large-scale cooling device and do not require special heat resistance, so that they have general performance. A vertical guidance device or an electric motor with a speed reducer can be used.

It is a side view which shows the roller transfer type firing furnace of one Example of this invention. It is a horizontal sectional view explaining the relationship between the furnace wall and a shutter device in the roller transfer type firing furnace of FIG. FIG. 3 is an enlarged view showing a cross section of the roller transport type firing furnace of FIG. 1 in terms of III-III. It is an enlarged view which shows the shutter device provided in the roller transfer type firing furnace of FIG. It is a perspective view which shows the shutter case which accommodates the upper and lower shutter members of FIG. It is a top view which shows the state which the upper and lower shutter members of FIG. 4 are housed in a shutter case. It is a figure explaining the structure of the upper and lower shutter members of FIG. 4 by cutting out a part.

Hereinafter, an embodiment of the shutter device of the roller transfer type firing furnace of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a side view of a roller-conveying type firing furnace (hereinafter referred to as a firing furnace) 12 provided with a plurality of shutter devices S1 to S7 that can be opened and closed, which is an example of the present invention. FIG. 2 is a horizontal sectional view illustrating the relationship between the shutter devices S1 to S7 and the furnace wall 24 of the firing pot 12. The firing furnace 12 includes a base frame 14 and a tunnel-shaped furnace body 16 supported by the base frame 14. The base frame 14 has a lower frame 18, a plurality of support columns 20 protruding upward from the lower frame 18, and an upper frame 22 supported by the support frames 20 on which the furnace body 16 is placed. ing.

The furnace body 16 includes, for example, a furnace wall 24 composed of a heat insulating material in which ceramic fiber boards formed into a plate shape by adding an inorganic filler and an inorganic / organic binder to bulk fiber are stacked in the thickness direction, and a furnace wall. In 24, a heating region, that is, a processing space Z, formed from the inlet 16a to the outlet 16b is provided. Then, the processing space Z is divided into seven processing spaces Z1 to Z7 by shutter devices S1 to S7 and partition walls PW provided at a plurality of locations (7 locations in this embodiment) in the longitudinal direction of the furnace body 16. Of the seven processing spaces Z1 to Z7, Z1, Z2, Z3 to Z4, Z5, Z6, and Z7 are thermally and atmospherically shielded by the shutter devices S1 to S7. Further, the treatment spaces Z3 and Z4 have the same temperature and atmosphere (oxygen concentration), but for example, a partition wall PW for facilitating temperature control between the treatment spaces Z3 and Z4 is interposed. Since the temperature difference between the processing spaces Z4 and Z5 is large, a partition wall PW is provided so as to overlap the shutter device S4.

FIG. 3 is an enlarged view showing a cross section of the firing furnace 12, that is, a sectional view taken along line III-III of FIG. The furnace wall 24 is protected by an upper surface cover plate 28a covering the upper surface of the furnace wall 24, side cover plates 28b and 28c covering a pair of side surfaces of the furnace wall 24, and a bottom cover plate 28d covering the bottom surface of the furnace wall 24. ing. The top cover plate 28a, the pair of side cover plates 28b and 28c, and the bottom cover plate 28d are fastened to each other by bolts 28e at the edge portion along the longitudinal direction of the furnace body 16, and the side covers are covered. The plates 28b and 28c and the edge portion of the bottom cover plate 28d are fixed to the side edge portion of the upper frame 22 by co-fastening the bolt 28e.

On the furnace wall 24, a plurality of transfer rollers 26 penetrating in the width direction of the furnace body 16 are arranged at predetermined intervals from the inlet 16a to the outlet 16b. These transport rollers 26 are tubular bodies having high heat resistance, such as those made of alumina. As shown in FIG. 3, the transfer roller 26 has a pair of transfer roller support devices 30 provided on a pair of side cover plates 28b and 28c that cover the side surfaces of the furnace wall 24 at both ends protruding outward from the furnace body 16. One of the pair of transfer roller support devices 30 is connected to the transfer roller drive device 32 provided on the upper frame 22 via the drive chain 38, so that a plurality of transfer rollers 26 are supported rotatably. However, except for the processing space Z7, they are arranged at equal intervals and are intermittently rotationally driven in a uniform direction and rotational speed. As a result, the material 36 to be heated on the transport plate 34 placed on the transport roller 26 is subjected to a predetermined heat treatment in the process of being transported from the inlet 16a to the outlet 16b. The firing furnace 12 is a so-called tunnel type firing furnace (roller harsher kiln).

The pair of transfer roller support devices 30 are provided concentrically with the support rod 30a, which is rotatably supported by bearings around a horizontal axis and is fitted to the shaft end of the transfer roller 26 which is a tubular body. It is provided with a spring 30b that urges the end surface of the transport roller 26 toward the furnace body 16. The one transfer roller support device 30 that supports a plurality of transfer rollers 26 includes sprockets 30c, respectively, and is connected to each other by a synchronous chain 40. Further, a sprocket 33 is provided for each of the plurality of the transfer roller support devices 30 and the transfer roller drive device 32, and the drive chain 38 is wound around the sprocket 33.

Shutter devices S1 to S7 provided at a plurality of locations (7 locations in this embodiment) in the longitudinal direction of the furnace body 16 and seven processing spaces Z1 to Z7 divided by partition walls PW have both ends formed by furnace walls 24. A plurality of supported heaters H are arranged so as to be located above and below the transport roller 26 as a heating source. Further, for example, a gas injection pipe GP for forming a gas atmosphere for performing gas carburizing treatment and a temperature sensor (not shown) are provided.

For example, in an empty furnace (no load), the temperature and oxygen concentration of the first treatment (defatting) space Z1 out of the seven treatment spaces are, for example, 800 ° C. and 100 ppm, the temperature of the second treatment (preheat) space Z2 and The oxygen concentration is, for example, 1000 ° C. and 80 ppm, the temperature and oxygen concentration of the third treatment (preheating) space Z3 is, for example, 1115 ° C. and 10 ppm, and the temperature and oxygen concentration of the fourth treatment (sinter) space Z4 are, for example, 1115 ° C. And 10 ppm, the temperature and oxygen concentration of the fifth treatment (slow cooling) space Z5 are, for example, 500 ° C and 10 ppm, the temperature and oxygen concentration of the sixth treatment (slow cooling) space Z6 are, for example, 50 ° C and 10 ppm, the seventh treatment. The temperature and oxygen concentration of the (slow cooling) space Z7 are independently controlled by a temperature control device and an atmosphere control device (not shown) so as to be, for example, 50 ° C. and 10 ppm, respectively. As a result, a rapid temperature rise of 800 ° C. from room temperature is achieved in the inlet 16a to the first treatment (defatting) space Z1, and the degreasing treatment (defatting treatment) is achieved in the first treatment (defatting) space Z1 to the third treatment (preheating) space Z3. From 100 ppm) to sintering (10 ppm), it is achieved in 3 zones.

Since the shutter devices S1 to S7 have substantially the same configuration, the shutter device S1 shown in FIG. 4, which is a vertical cross section of FIG. 1, will be described as a representative. The shutter device S1 is fixed to the furnace body 16 between the processing space Z1 formed in the furnace body 16 and the inlet 16a, and can come into contact with the fixed shutter member 44 having the upper end opening / closing surface 42 and the upper end opening / closing surface 42. A pair of upper and lower shutter members 48 that have a lower end opening / closing surface 46 and open and close between the processing space Z1 formed in the furnace body 16 and the inlet 16a, and a pair that protrudes downward from the upper and lower shutter members 48 through between the transport rollers 26. The support rod 50 and the shutter drive device 52 arranged under the furnace body 16 are provided.

The shutter drive device 52 drives the upper and lower shutter members 48 in the vertical direction via a pair of support rods 50, and has an open position that separates the lower end opening / closing surface 46 of the upper / lower shutter member 48 from the upper opening / closing surface 42, and the upper and lower shutter members 48. The lower end opening / closing surface 46 of the fixed shutter member 44 is positioned at a closed position in contact with the upper end opening / closing surface 42 of the fixed shutter member 44. In FIG. 4, the upper and lower shutter members 48 shown by the solid line indicate the open position, and the upper and lower shutter members 48 shown by the broken line indicate the closed position.

The fixed shutter member 44 and the upper and lower shutter members 48 have thicknesses t2 and t1 larger than the arrangement interval d1 of the two adjacent transfer rollers 26, preferably the core interval p of the two adjacent transfer rollers 26, respectively. It is composed of a heat insulating material made of ceramic fiber. This heat insulating material is formed by adding an inorganic filler and an inorganic / organic binder to, for example, a ceramic fiber, and has a heat resistant temperature of about 1300 ° C. and a density of about 0.3 (g / cm ³ ). .. Ceramic fiber is an artificial inorganic fiber containing high-purity alumina / silica as a main component. Further, the support rod 50 is formed in a circular shape from, for example, a ceramic material, for example, a material containing alumina as a main component, and has high heat resistance.

A transport roller 26 is provided on a pair of ridges between the upper end opening / closing surface 42 of the fixed shutter member 44, the front surface 44a facing the transport direction of the material 36 to be heated, and the rear surface 44b facing the transport direction of the material 36 to be heated. A pair of concave grooves 44c and 44d for avoiding interference are formed, respectively. Further, a transport roller 26 is provided on a pair of ridges between the lower end opening / closing surface 46 of the upper and lower shutter members 48, the front surface 48a facing the transport direction of the material 36 to be heated, and the rear surface 48b facing the transport direction of the material 36 to be heated. A pair of concave grooves 48c and 48d for avoiding interference with the above are formed, respectively. As a result, at the closed position of the upper and lower shutter members 48, the upper end opening / closing surface 42 of the fixed shutter member 44 and the lower end opening / closing surface 46 of the upper and lower shutter members 48 are positioned between the transport rollers 26 and approach or come into contact with each other. Therefore, sufficient heat insulating performance between the heating regions is obtained, and the temperature difference between the processing space Z1 and the inlet 16a, that is, the temperature difference between the heating region Z1 corresponding to the processing space Z1 and the outer region corresponding to the inlet 16a. Can be formed steeply. Further, for example, in the case of the shutter device S3 that opens and closes between the heating regions Z2 and Z3, the temperature difference between the heating regions Z2 and Z3 can be steeply formed.

The shutter drive device 52 is provided on the upper frame 22 on which the furnace body 16 is placed in the base frame 14. The shutter drive device 52 is fixed to the upper and lower plates 54 to which the lower ends of the pair of support rods 50 are fixed, the upper and lower frames 22, and the vertical guidance device 56 to guide the upper and lower plates 54 in the vertical direction, and the upper frame 22. It is provided with an electric motor 58 with a speed reducer that is fixed and drives the upper and lower plates 54 in the vertical direction.

A fixing bracket 60 extending downward is fixed to the upper frame 22, and the fixing bracket 60 has a guide bush 62 fixed to the upper and lower plates 54 and a guide rod for guiding the guide bush 62 in the vertical direction. 64 and is fixed. Further, an electric motor 58 with a speed reducer is provided below the fixed bracket 60, and a sprocket 66 fixed to the output shaft of the electric motor 58 with a speed reducer and a sprocket 68 rotatably provided above the fixed bracket 60 (FIG. FIG. 3), the drive chain 70 is wound in the vertical direction. Further, as shown in FIG. 3, a drive chain fixture 72 for fixing a part of the drive chain 70 to the upper and lower plates 54 is provided, and the upper and lower shutter members 48 are driven in the vertical direction by the electric motor 58 with a speed reducer. It has become like. The guide bush 62 fixed to the upper and lower plates 54 and the guide rod 64 for guiding the guide bush 62 in the vertical direction function as the vertical guide device 56, and the drive chain wound around the sprocket 66 and the sprocket 68. The 70 and the electric motor 58 with a speed reducer function as a part of the shutter drive device 52.

FIG. 5 is a perspective view showing the shutter case 76, and FIG. 6 is a plan view showing the shutter case 76. As shown in FIGS. 5 and 6, the shutter device S1 includes a shutter case 76 that is fixed to the furnace body 16 and accommodates the upper and lower shutter members 48 and guides them in the vertical direction. The shutter case 76 is configured by bonding a heat insulating plate material CFB made of ceramic fibers laminated in the vertical direction with a ceramic bond in a laminated state. This heat insulating plate material CFB is a frame-shaped heat insulating material formed in a frame shape by adding an inorganic filler and an inorganic / organic binder to ceramic fiber, and has a heat resistant temperature of about 1300 ° C. and 0.3 (g / cm ^3). ) It has a density of about. The ceramic bond is, for example, a one-component adhesive containing high-purity alumina or high-purity silica as a main component, for example, a curing temperature of 100 ° C. to 150 ° C., a heat resistant temperature of about 1500 ° C., 40 × ^10-7 / K. It has a coefficient of thermal expansion of about 15 (kg / cm ² ) and an adhesive strength of about 15.

The shutter case 76 has a front wall 76a located on the downstream side in the transport direction of the material 36 to be heated and a rear wall 76a located on the upstream side in the transport direction of the material 36 to be heated, respectively, in which through holes 78 for passing the material 36 to be heated are formed. A storage space having a wall 76b and a pair of side walls 76c connecting both ends of the front wall 76a and the rear wall 76b in the width direction, and formed between the front wall 76a and the rear wall 76b and the pair of side walls 76c. The upper and lower shutter members 48 are housed therein so as to be movable in the vertical direction.

A pair of guide rails 80 having a circular cross section extending in the vertical direction are extended in the vertical direction on the inner wall surfaces of the front wall 76a and the rear wall 76b of the shutter case 76, and are provided on the front surface 48a and the rear surface 48b of the vertical shutter member 48. Is formed with concave guide grooves 48e and 48f into which each pair of guide rails 80 is fitted. As a result, the upper and lower shutter members 48 have an interval k in which the front surface 48a and the rear surface 48b of the upper and lower shutter members 48 are smaller than the protrusion dimension from the inner wall surface of the guide rail 80 so that the inner wall surface of the front wall 76a and the rear wall 76b of the shutter case 76 It is guided in the vertical direction by the guide rail 80 in a state of being separated from the above.

The shutter case 76 avoids interference between the thickness dimension T, which is about three times larger than the core spacing p of the plurality of transport rollers 26, the pair of through holes 76d and 76e that penetrate the transport rollers 26, and the transport rollers 26. A pair of recessed grooves 76f and 76g formed in the front wall 76a and the rear wall 76b of the shutter case 76 are provided, and the material to be heated 36 is placed in a state where the upper and lower shutter members 48 are positioned in the closed position. The through hole 78 to be passed through is closed by the upper and lower shutter members 48. The thickness dimension T of the shutter case 76 is larger than the distance d2 (see FIG. 4) between the pair of transport rollers 26 sandwiching the two transport rollers 26.

FIG. 7 is a diagram illustrating the configuration of the upper and lower shutter members 48 by cutting out a part. The upper and lower shutter members 48 are integrally fixed with the pair of front heat insulating plates 82 and the rear heat insulating plates 84 by adhering their mating surfaces with ceramic bonds while sandwiching the upper ends of the pair of support rods 50. , The pair of front heat insulating plates 82 and the rear heat insulating plates 84 are integrally fixed to the end faces opposite to the pair of support rods 50, that is, the upper end faces 82a and 84a by ceramic bonds, respectively. It is provided with an upper end side heat insulating plate 86. The front heat insulating plate 82, the rear heat insulating plate 84, and the upper end heat insulating plate 86 are composed of, for example, a ceramic fiber board formed into a plate shape by adding an inorganic filler and an inorganic / organic binder to a ceramic bulk fiber. ..

In the front heat insulating plate 82 and the rear heat insulating plate 84, for example, an inorganic filler and an inorganic / organic binder are added to ceramic bulk fiber to form a columnar shape harder than the front heat insulating plate 82 and the rear heat insulating plate 84. The first columnar heat insulating reinforcing pins 88 having the same length as the thickness of the front heat insulating plate 82 and the rear heat insulating plate 84 (three in this embodiment, not shown) are the widths of the upper and lower shutter members 48. The front heat insulating plate 82 and the rear heat insulating plate 84 are driven in the thickness direction at equal intervals in the direction and fixed by a ceramic bond.

Further, similarly to the first columnar heat insulating reinforcing pin 88, an inorganic filler and an inorganic / organic binder are added to the ceramic bulk fiber to form a columnar shape harder than the front heat insulating plate 82 and the rear heat insulating plate 84. A plurality of (6 in this embodiment) second columnar heat insulating reinforcing pins 90 are driven into the front heat insulating plate 82 and the rear heat insulating plate 84 in the direction parallel to the support rod 50 through the upper end side heat insulating plate 86. And it is fixed by a ceramic bond.

Similar to the first columnar heat insulating reinforcing pin 88 and the second columnar heat insulating reinforcing pin 90, an inorganic filler and an inorganic / organic binder are added to the ceramic bulk fiber at the upper ends of the pair of support rods 50. Cylindrical heat insulating bushes 92, which are harder than the front heat insulating plate 82 and the rear heat insulating plate 84 and are formed in a cylindrical shape, are fitted and fixed by ceramic bonds.

On the mating surfaces of the front heat insulating plate 82 and the rear heat insulating plate 84, a pair of small-diameter concave grooves 94 into which a pair of support rods 50 are fitted and a pair of cylindrical heat insulating bushes fixed to the upper ends of the pair of support rods 50. The large-diameter concave groove 96 into which the 92 is fitted is continuously generated in the vertical direction. At the upper ends of the pair of support rods 50, a plurality of metal pins 98 made of heat-resistant alloy, for example, stainless steel (two in this embodiment) are provided, and both ends of the metal pins 98 are on the front side from the cylindrical heat insulating bush 92. The heat insulating plate 82 and the rear heat insulating plate 84 are fixed in a protruding state in the direction of the mating surface.

Between the pair of support rods 50 and the pair of small-diameter concave grooves 94 into which they are fitted, and between the pair of cylindrical heat insulating bushes 92 fixed to the upper ends of the pair of support rods 50 and the large-diameter concave grooves into which they are fitted. The mating surfaces of the front heat insulating plate 82 and the rear heat insulating plate 84 are also bonded to the 96 by a ceramic bond at the same time. As shown in FIG. 4, a support rod through hole 100 is formed at the bottom of the furnace body 16 to allow the pair of support rods 50 to penetrate downward, and the opening of the support rod through hole 100 and the support rod 50 are formed. A bellows 104 is arranged between the disc-shaped bellows connecting member 102 fixed to the lower end.

The shutter devices S1 to S7 of the firing furnace (roller transport type firing furnace) 12 of the present embodiment configured as described above include an upper and lower shutter member 48 that is driven in the vertical direction to open and close the space in the furnace body 16. A shutter case 76 fixed to the furnace body 16 and accommodating the upper and lower shutter members 48 and guiding the upper and lower shutter members 48 in the vertical direction is included, and the shutter case 76 is composed of a laminated body of heat insulating plate material CFB laminated in the vertical direction. .. From this, it is possible to suppress thermal deformation of the shutter case 76 that houses the upper and lower shutter members 48. As a result, interference occurs between the upper and lower shutter members 48 and the shutter case 76 that houses the upper and lower shutter members 48, and the wear debris is eliminated from being scattered in the furnace.

Further, in the shutter devices S1 to S7 of the firing furnace (roller transfer type firing furnace) 12 of the present embodiment, the laminates of the heat insulating plate material CFB constituting the shutter case 76 are made of ceramic fibers and are mutually formed by ceramic bonds. Since the bonded frame-shaped heat insulating plate material is laminated, the rigidity of the shutter case 76 is increased, so that the thermal deformation of the shutter case 76 accommodating the upper and lower shutter members 48 is further suppressed.

Further, in the shutter devices S1 to S7 of the firing furnace (roller transfer type firing furnace) 12 of the present embodiment, the upper and lower shutter members 48 are ceramic fibers having a thickness t1 larger than the core spacing p of the plurality of transfer rollers 26. Since it is composed of a fibrous heat insulating plate material composed of, high heat insulating properties can be obtained, so that the heat insulating performance between the heating regions divided by the upper and lower shutter members 48 is enhanced, and the space between the processing spaces (heating regions) is improved. The temperature difference can be formed steeply. Moreover, the furnace length can be shortened.

Further, in the shutter devices S1 to S7 of the firing furnace (roller transport type firing furnace) 12 of the present embodiment, the shutter case 76 has a front wall 76a and a rear wall in which through holes 78 through which the material to be heated 36 passes are formed, respectively. It has a 76b and a pair of side walls 76c connecting both ends of the front wall 76a and the rear wall 76b in the width w direction, and is formed between the front wall 76a and the rear wall 76b and the pair of side walls 76c. The upper and lower shutter members 48 are housed in the space so as to be movable in the vertical direction. As a result, the heat insulating performance between the heating regions divided by the upper and lower shutter members 48 is enhanced, and the temperature difference between the processing spaces (heating regions) can be steeply formed. Moreover, the furnace length can be shortened.

Further, in the shutter devices S1 to S7 of the firing furnace (roller transport type firing furnace) 12 of the present embodiment, the guide rails 80 extend in the vertical direction on the inner wall surfaces of the front wall 76a and the rear wall 76b of the shutter case 76, respectively. The front surface 48a and the rear surface 48b of the upper and lower shutter members 48 are formed with concave guide grooves 48e and 48f into which the guide rails 80 are fitted, and the upper and lower shutter members 48 have the front surface 48a and the rear surface 48b of the upper and lower shutter members 48. The guide rail 80 guides the guide rail 80 in the vertical direction with a distance k smaller than the protrusion dimension from the inner wall surface separated from the inner wall surface. As a result, the upper and lower shutter members 48 are in a state where the front surface 48a and the rear surface 48b of the upper and lower shutter members 48 are separated from the inner wall surface by a distance k smaller than the protrusion dimension from the inner wall surface of the guide rail 80. Since it is guided in the vertical direction by, interference between the upper and lower shutter members 48 and the shutter case 76 accommodating the upper and lower shutter members 48 is prevented, and the heat insulating performance between the processing spaces (heating regions) divided by the upper and lower shutter members 48 is prevented. Is enhanced.

Further, in the shutter devices S1 to S7 of the firing furnace (roller transfer type firing furnace) 12 of the present embodiment, the shutter case 76 sandwiches two adjacent transfer rollers 26 among the plurality of transfer rollers 26. The shutter case 76 has two transport rollers 26 adjacent to the outside of the two adjacent transport rollers 26, and has a thickness dimension T larger than the distance d2 of the pair of transport rollers 26 located at. Through holes 76d and 76e penetrating in the direction and a pair of concave grooves 76f and 76g are formed in order to avoid interference with the pair of transport rollers 26. From this, since the entire upper and lower shutter members 48 can be made of a relatively thick heat insulating material, sufficient heat insulating performance between the heating regions can be obtained, and a temperature difference between the heating regions can be steeply formed. Further, there is an advantage that the distance between the transport rollers 26 can be reduced and a small object to be heated can be stably transported.

Further, in the shutter devices S1 to S7 of the firing furnace (roller transfer type firing furnace) 12 of the present embodiment, the upper and lower shutter members 48 have a thickness t1 larger than the core spacing p of the two adjacent transfer rollers 26 and adjacent to each other. It has a pair of recessed grooves 48c and 48d formed at the ridges between the lower end opening / closing surface 46 and the front surface 48a and the rear surface 48b, respectively, in order to avoid interference with the two matching transfer rollers 26, and is closed. In the state of being lowered to the position, the lower end opening / closing surface 46 is located between the transfer rollers 26. From this, since the entire upper and lower shutter members 48 can be made of a relatively thick heat insulating material, sufficient heat insulating performance between the heating regions can be obtained, and a temperature difference between the heating regions can be steeply formed. Further, there is an advantage that the distance between the transport rollers 26 can be reduced and a small object to be heated can be stably transported.

Further, in the shutter devices S1 to S7 of the firing furnace (roller transfer type firing furnace) 12 of the present embodiment, the shutter case 76 fixed to the furnace body 16 has a core spacing p of two adjacent transfer rollers 26. A pair of recessed grooves 44c, 44d formed on the ridge between the upper end opening / closing surface 42 and the front surface 44a and the rear surface 44b, respectively, in order to avoid interference between the large thickness t2 and the two adjacent transport rollers 26. And a fixed shutter member having an upper end opening / closing surface 42 to which the lower end opening / closing surface 46 of the upper / lower shutter member 48 is brought close to the upper / lower shutter member 48 in a state of being positioned between the transport rollers 26 and lowered to the closed position. 44 is housed in a fixed position. From this, since the entire fixed shutter member 44 can be made of a relatively thick heat insulating material, sufficient heat insulating performance between the heating regions can be obtained, and a temperature difference between the heating regions can be steeply formed. Further, there is an advantage that the distance between the transport rollers can be reduced and a small object to be heated can be stably transported.

Further, the shutter devices S1 to S7 of the firing furnace (roller transfer type firing furnace) 12 of the present embodiment pass between the upper and lower shutter members 48 and a pair of adjacent transfer rollers 26 among the plurality of transfer rollers 26. A pair of support rods 50 protruding downward from the lower end of the upper and lower shutter members 48, and a pair of support rods 50 arranged below the furnace body 16 and driving the upper and lower shutter members 48 in the vertical direction via the pair of support rods 50 to open the position. A shutter drive device 52 that is positioned at the closed position is included. Since the shutter drive device 52 is arranged below the furnace body 16 in this way, it is not easily affected by the heat of the furnace body 16, so that the shutter drive device 52 that drives the upper and lower shutter members 48 up and down is used. There is no need to install a large-scale cooling mechanism device.

Further, in the shutter devices S1 to S7 of the firing furnace (roller transfer type firing furnace) 12 of the present embodiment, the furnace body 16 is supported by the base frame 14, and the base frame 14 is the lower frame 18. The shutter drive device 52 is provided on the upper frame 22 and has a support frame 20 protruding upward from the lower frame 18 and an upper frame 22 supported by the support frame 20 on which the furnace body 16 is placed. There is. As described above, since the shutter drive device 52 is provided on the upper frame 22 of the base frame 14, the displacement of the shutter drive device 52 with respect to the upper and lower shutter members 48 is suppressed, so that the mechanical strength is increased. The consumption of the relatively low upper and lower shutter members 48 is suppressed.

Further, in the shutter devices S1 to S7 of the firing furnace (roller transport type firing furnace) 12 of the present embodiment, the shutter driving device 52 includes an upper and lower plates 54 to which the lower ends of the pair of support rods 50 are fixed, and an upper frame 22. Includes a vertical guidance device 56 that is fixed to and guides the vertical plate 54 in the vertical direction, and an electric motor 58 with a speed reducer that is fixed to the upper frame 22 and drives the vertical plate 54 in the vertical direction. As a result, a large-scale cooling device for the vertical guidance device 56 and the electric motor 58 with a reduction gear is not required, and no special heat resistance is required. Therefore, the vertical guidance device 56 and deceleration with general performance are not required. An electric motor 58 with a machine can be used.

Although the present invention has been described in detail with reference to the tables and drawings above, the present invention can be carried out in still another embodiment, and various modifications can be made without departing from the gist thereof.

For example, in the above-described embodiment, the thickness dimension t1 of the upper and lower shutter members 48 is larger than the arrangement interval d1 of the transfer rollers 26 or the core interval p of the transfer rollers 26, but the arrangement intervals d1 of the transfer rollers 26 or It may be smaller than the core spacing p of the transport roller 26.

When the thickness dimension t1 of the upper and lower shutter members 48 is equal to or less than the arrangement interval d1 of the transport rollers 26, the upper and lower shutter members 48 are lowered to open the position, and raised to open the position. May be good.

Further, in the above-described embodiment, the shutter devices S2 to S7 of the firing furnace (roller transfer type firing furnace) 12 differ in the number and position of the guide rails 80 from the shutter device S1, but the shutter case 76 of the shutter device S1. It may be configured in the same manner as. Further, the shutter devices S1 to S7 may be configured to be different from each other. Further, with respect to a part of the shutter devices S1 to S7, for example, the shutter devices S1 to S5 provided at a position where the processing temperature is high in the processing spaces Z1 to Z7, the shutter driving device 52 is the furnace body 16. It may be arranged on the lower side.

The above is just an embodiment of the present invention, and the present invention is subject to various modifications without departing from the spirit of the present invention.

12: Roller transfer type firing furnace (firing furnace)
14: Base frame 16: Furnace 18: Lower frame 20: Strut frame 22: Upper frame 24: Furnace wall 26: Transfer roller 30: Transfer roller support device 32: Transfer roller drive device 36: Heated material 38: Drive Chain 40: Synchronous chain 42: Upper end opening / closing surface 44: Fixed shutter member 44a: Front surface 44b: Rear surface 44c: Recessed groove 44d: Recessed groove 46: Lower end opening / closing surface 48: Upper and lower shutter member 48a: Front surface 48b: Rear surface 48c: Recessed groove 48d : Concave groove 48e: Concave guide groove 48f: Concave guide groove 50: Support rod 52: Shutter drive device 54: Vertical plate 56: Vertical guide device 58: Electric motor with speed reducer 60: Fixed bracket 62: Guide bush 64: Guide rod 66: Sprocket 68: Sprocket 70: Drive chain 72: Drive chain fixture 76: Shutter case 76a: Front wall 76b: Rear wall 76c: Side wall 76d: Through hole 76e: Through hole 76f: Recessed groove 76g: Recessed groove 78: Through Hole 80: Guide rails S1 to S7: Shutter device PW: Partition Z1 to Z8: Processing space (heating area)

The gist of the first invention is a roller transport type firing furnace having a tunnel-shaped furnace body and heat-treating a material to be heated transported by a plurality of transfer rollers penetrating the furnace body in the width direction. A shutter device for a roller-conveying firing furnace that divides the space inside the furnace into a plurality of heating regions in the longitudinal direction of the space, and is driven in the vertical direction and provided with the upper and lower shutter members inside the furnace. is fixed to the furnace body, and a shutter casing for guiding vertically to accommodate the vertical shutter member, wherein said shutter case is constituted by a stack of insulation sheet stacked in the vertical direction, the The shutter case has an anterior wall and a rear wall in which through holes for passing the material to be heated are formed, and a pair of side walls connecting both ends of the anterior wall and the rear wall in the width direction. The upper and lower shutter members are movably housed in a storage space formed between the front wall and the rear wall and the pair of side walls, and the inner wall surfaces of the front wall and the rear wall of the shutter case , The guide rails are extended in the vertical direction, respectively, and concave guide grooves into which the guide rails are fitted are formed on the front and rear surfaces of the upper and lower shutter members, and the upper and lower shutter members are formed on the front surface and the front surface of the upper and lower shutter members. in a state where the rear surface is spaced between the inner wall surface of the smaller intervals than projecting dimension from the inner wall surface of the guide rail, in Rukoto guided vertically by the guide rail.

The gist of the second invention is that, in the first invention, the laminated body of the heat insulating plate material constituting the shutter case is bonded to each other by a ceramic bond in a laminated state of the frame-shaped heat insulating plate materials made of ceramic fibers. Ru Monodea that is.

The gist of the third invention is that in the first invention or the second invention, the plurality of transport rollers are arranged at a fixed core interval, and the upper and lower shutter members are the cores of the plurality of transport rollers. It is made of a fibrous heat insulating plate material made of ceramic fibers having a thickness larger than the interval.

The gist of the fourth invention is that in any one of the first to third inventions, the plurality of transport rollers are arranged at a constant core interval, and the upper and lower shutter members are the plurality. It is formed on the ridge between the lower end opening / closing surface and the front and rear surfaces in order to avoid interference with the transfer rollers and the thickness larger than the core spacing of the pair of adjacent transfer rollers of the book transfer rollers. The lower end opening / closing surface is located between the transport rollers in a state of having a pair of concave grooves and being lowered to a closed position.

And has as subject matter of the fifth invention, in any one invention of the first through fourth aspects of the invention, throughout the said conveying rollers, and a pair of support rods projecting downwardly from the lower end of the upper and lower shutter member, wherein It is to include a shutter driving device which is arranged on the lower side of the furnace body and drives the upper and lower shutter members in the vertical direction via the pair of support rods to be positioned at an open position and a closed position.

The gist of the sixth invention is that in any one of the first to fifth inventions, the shutter case sandwiches two adjacent transport rollers among the plurality of transport rollers. in has a thickness of larger than the distance between the pair of conveyance rollers positioned, the said shutter case, a through hole through which the conveying rollers of the two in the width direction, of the conveying roller of the two in that a pair of grooves for avoiding interference with the pair of conveying rollers adjacent to the outside are formed.

The gist of the seventh invention is a roller transport type firing furnace having a tunnel-shaped furnace body and heat-treating a material to be heated transported by a plurality of transfer rollers penetrating the furnace body in the width direction. A shutter device for a roller-conveying firing furnace that divides the space inside the furnace into a plurality of heating regions in the longitudinal direction of the space, and is driven in the vertical direction and is provided with an upper and lower shutter member inside the furnace. The shutter case includes a shutter case fixed to the furnace body, accommodating the upper and lower shutter members and guiding the upper and lower shutter members in the vertical direction, and the shutter case is composed of a laminated body of heat insulating plate materials laminated in the vertical direction. The plurality of transport rollers are arranged at a constant core spacing, and the upper and lower shutter members have a thickness larger than the core spacing of a pair of adjacent transport rollers among the plurality of transport rollers and the transport rollers. The lower end opening / closing surface has a pair of concave grooves formed on the ridges between the lower end opening / closing surface and the front and rear surfaces in order to avoid interference with the lower end opening / closing surface, and when lowered to the closed position, the lower end opening / closing surface It is located between the transport rollers.

The gist of the ninth invention is a roller transport type firing furnace having a tunnel-shaped furnace body and heat-treating a material to be heated transported by a plurality of transfer rollers penetrating the furnace body in the width direction. A shutter device for a roller-conveying firing furnace that divides the space inside the furnace into a plurality of heating regions in the longitudinal direction of the space, and is driven in the vertical direction and provided with the upper and lower shutter members inside the furnace. The shutter case includes a shutter case fixed to the furnace body, accommodating the upper and lower shutter members and guiding the upper and lower shutter members in the vertical direction, and the shutter case is composed of a laminated body of heat insulating plate materials laminated in the vertical direction. A pair of support rods that project downward from the lower end of the upper and lower shutter members through between the transport rollers, and a pair of support rods that are arranged under the furnace body and drive the upper and lower shutter members in the vertical direction via the pair of support rods. The shutter drive device is to be included in the open position and the closed position.

According to the shutter device of the roller transport type firing furnace of the first invention, the upper and lower shutter members are driven in the vertical direction and provided in the furnace body, and the upper and lower shutter members are fixed to the furnace body and accommodate the upper and lower shutter members up and down. The shutter case includes a shutter case that guides in the direction, and the shutter case is composed of a laminated body of heat insulating plate materials that are laminated in the vertical direction. From this, it is possible to suppress thermal deformation of the shutter case that houses the upper and lower shutter members. As a result, interference occurs between the upper and lower shutters and the shutter case accommodating the upper and lower shutters, and wear debris is eliminated from being scattered in the furnace. Further, the shutter case has a front wall and a rear wall in which through holes for passing the material to be heated are formed, and a pair of side walls connecting both ends of the front wall and the rear wall in the width direction, respectively. The upper and lower shutter members are movably accommodated in the accommodating space formed between the anterior wall and the rear wall and the pair of side walls. As a result, the heat insulating performance between the heating regions divided by the upper and lower shutter members is enhanced, and the temperature difference between the heating regions can be steeply formed. Moreover, the furnace length can be shortened. Further, guide rails are extended in the vertical direction on the inner wall surfaces of the front wall and the rear wall of the shutter case, and concave guide grooves into which the guide rails are fitted on the front and rear surfaces of the upper and lower shutter members. The upper and lower shutter members are formed so that the front and rear surfaces of the upper and lower shutter members are separated from the inner wall surface by a distance smaller than the protrusion dimension of the guide rail from the inner wall surface. Guides you up and down. As a result, the upper and lower shutter members are moved up and down by the guide rail in a state where the front and rear surfaces of the upper and lower shutter members are separated from the inner wall surface by a distance smaller than the protrusion dimension of the guide rail from the inner wall surface. Since it is guided in the direction, interference between the upper and lower shutter members and the shutter case accommodating the upper and lower shutter members is prevented, and the heat insulating performance between the heating regions divided by the upper and lower shutter members is enhanced.

According to the shutter device of the roller transport type firing furnace of the second invention, the laminated bodies of the heat insulating plate materials constituting the shutter case are mutually formed by ceramic bonds in a laminated state of the frame-shaped heat insulating plate materials made of ceramic fibers. from glued Monodea Rukoto, the rigidity of the frame-shaped insulation plate is increased, the thermal deformation of the shutter case for housing the upper and lower shutter member is further suppressed.

According to the shutter device of the roller transfer type firing furnace of the third invention, the plurality of transfer rollers are arranged at a constant core spacing, and the upper and lower shutter members are larger than the core spacing of the plurality of transfer rollers. Since it is composed of a plate-like fibrous heat insulating material made of ceramic fiber having a large thickness, high heat insulating property can be obtained, so that the heat insulating performance between the heating regions divided by the upper and lower shutter members is enhanced. The temperature difference between the heating regions can be formed steeply. Moreover, the furnace length can be shortened.

According to the shutter device of the roller transfer type firing furnace of the fourth invention, the plurality of transfer rollers are arranged at a constant core interval, and the upper and lower shutter members are adjacent to each other among the plurality of transfer rollers. It has a thickness larger than the core spacing of the pair of transport rollers and a pair of concave grooves formed on the ridges between the lower end opening / closing surface and the front and rear surfaces in order to avoid interference with the transport rollers. In the state of being lowered to the closed position, the lower end opening / closing surface is located between the transport rollers. From this, since the entire upper and lower shutter members can be made of a relatively thick heat insulating material, sufficient heat insulating performance between the heating regions can be obtained, and a temperature difference between the heating regions can be steeply formed. Further, there is an advantage that the distance between the transport rollers can be reduced and a small object to be heated can be stably transported.

According to the shutter device of the roller transport type firing furnace of the fifth invention, a pair of support rods protruding downward from the lower end portion of the upper and lower shutter members and arranged under the furnace body are arranged between the transport rollers. The shutter driving device includes a shutter driving device that drives the upper and lower shutter members in the vertical direction via a pair of support rods to position them in an open position and a closed position. In this way, since the shutter drive device is arranged on the lower side of the furnace body, it is not easily affected by the heat of the furnace body. Therefore, a large-scale cooling mechanism device is used for the shutter drive device that drives the upper and lower shutter members up and down. There is no need to provide.

According to the roller conveyor kiln shutter device of the sixth invention, the shutter case, the pair of conveyance rollers positioned in between the two transport rollers of adjacent groups out of the conveying rollers of the plurality of has a thickness of larger than the spacing, the said shutter case, a through hole through which the conveying rollers of the two in the width direction, the pair of conveying rollers adjoining the outside of the two transport rollers A pair of concave grooves are formed in order to avoid interference with. From this, since the entire upper and lower shutter members can be made of a relatively thick heat insulating material, sufficient heat insulating performance between the heating regions can be obtained, and a temperature difference between the heating regions can be steeply formed. Further, there is an advantage that the distance between the transport rollers can be reduced and a small object to be heated can be stably transported.

According to the shutter device of the roller transport type firing furnace of the seventh invention, the material to be heated which has a tunnel-shaped furnace body and is transported by a plurality of transfer rollers penetrating the furnace body in the width direction is heat-treated. A shutter device for a roller transport type firing furnace that divides the space inside the furnace into a plurality of heating regions in the longitudinal direction of the space in the roller transport type firing furnace, and is provided in the furnace body by being driven in the vertical direction. The upper and lower shutter members and a shutter case fixed to the furnace body and accommodating the upper and lower shutter members and guiding them in the vertical direction are included, and the shutter case is made of a laminated body of heat insulating plate materials laminated in the vertical direction. The plurality of transport rollers are arranged at a constant core spacing, and the upper and lower shutter members are larger than the core spacing of a pair of adjacent transport rollers among the plurality of transport rollers. It has a thickness and a pair of concave grooves formed on the ridges between the lower end opening / closing surface and the front and rear surfaces in order to avoid interference with the transport roller, and in a state of being lowered to the closed position. , The lower end opening / closing surface is located between the transport rollers. From this, since the entire upper and lower shutter members can be made of a relatively thick heat insulating material, sufficient heat insulating performance between the heating regions can be obtained, and a temperature difference between the heating regions can be steeply formed. Further, there is an advantage that the distance between the transport rollers can be reduced and a small object to be heated can be stably transported.

According to the shutter device of the roller transport type firing furnace of the ninth invention, the material to be heated which has a tunnel-shaped furnace body and is transported by a plurality of transfer rollers penetrating the furnace body in the width direction is heat-treated. A shutter device for a roller transport type firing furnace that divides the space inside the furnace into a plurality of heating regions in the longitudinal direction of the space in the roller transport type firing furnace, and is provided in the furnace body by being driven in the vertical direction. The upper and lower shutter members and a shutter case fixed to the furnace body and accommodating the upper and lower shutter members and guiding them in the vertical direction are included, and the shutter case is made of a laminated body of heat insulating plate materials laminated in the vertical direction. It is configured, a pair of support rods protruding downward from the lower end of the upper and lower shutter members through between the transport rollers, and the upper and lower shutter members arranged below the furnace body via the pair of support rods. Includes a shutter drive that drives the device up and down to position it in the open and closed positions. In this way, since the shutter drive device is arranged on the lower side of the furnace body, it is not easily affected by the heat of the furnace body. Therefore, a large-scale cooling mechanism device is used for the shutter drive device that drives the upper and lower shutter members up and down. There is no need to provide.

The gist of the third invention is that, in the first invention or the second invention, the plurality of transport rollers are located below the upper and lower shutter members and are arranged at a constant core interval. The upper and lower shutter members are made of a fibrous heat insulating plate material made of ceramic fibers and having a thickness larger than the constant core spacing.

And has as subject matter of the fourth invention, in the third invention, the upper and lower shutter member is larger than the core gap between the pair of conveying rollers adjacent groups out of a plurality of conveying rollers arranged in the fixed core spacing It has a thickness and a pair of concave grooves formed on the ridges between the lower end opening / closing surface and the front and rear surfaces in order to avoid interference with the pair of transport rollers, and is lowered to a closed position. In the state, the lower end opening / closing surface is located between the transport rollers.

The gist of the fifth invention is that, in the third or fourth invention , a pair of upper and lower shutter members projecting downward from the lower end portion of the upper and lower shutter members through the plurality of transport rollers arranged at a fixed core interval . Includes a support rod and a shutter drive device that is arranged below the furnace body and drives the upper and lower shutter members in the vertical direction via the pair of support rods to position them in open and closed positions. It is in.

The gist of the sixth invention is that in any one of the third to fifth inventions, the shutter case is an adjacent 2 of a plurality of transport rollers arranged at a fixed core interval. The shutter case has a thickness dimension larger than the distance between the pair of transport rollers located sandwiching the book transport rollers, and the shutter case has a through hole for passing the two transport rollers in the width direction. in that the pair of grooves are formed to avoid interference with the pair of conveying rollers adjoining the outside of the two transport rollers.

The gist of the seventh invention is a roller transport type firing furnace having a tunnel-shaped furnace body and heat-treating a material to be heated transported by a plurality of transfer rollers penetrating the furnace body in the width direction. A shutter device for a roller-conveying firing furnace that divides the space inside the furnace into a plurality of heating regions in the longitudinal direction of the space, and is driven in the vertical direction and is provided with an upper and lower shutter member inside the furnace. The shutter case includes a shutter case fixed to the furnace body, accommodating the upper and lower shutter members and guiding the upper and lower shutter members in the vertical direction, and the shutter case is composed of a laminated body of heat insulating plate materials laminated in the vertical direction. The plurality of transfer rollers include a plurality of transfer rollers located below the upper and lower shutter members and arranged at a fixed core interval, and the upper and lower shutter members include a plurality of transfer rollers arranged at a constant core interval. The thickness is larger than the core spacing of the pair of adjacent transport rollers, and the ridges between the lower end opening / closing surface and the front and rear surfaces are formed to avoid interference with the pair of transport rollers. The lower end opening / closing surface is located between the pair of transport rollers in a state of having the pair of recessed grooves and being lowered to the closed position.

The gist of the eighth invention is that in the seventh invention, the shutter case has a thickness larger than the core spacing of a pair of adjacent transport rollers among the plurality of transport rollers arranged at a constant core spacing. And, in order to avoid interference with the pair of transport rollers, the pair of concave grooves formed on the ridges between the upper end opening / closing surface and the front and rear surfaces, respectively, and the pair of transport rollers are located between the pair of recessed grooves. In a state where the upper and lower shutter members are lowered to the closed position, the fixed shutter member fixed to the furnace body has the upper end opening / closing surface to which the lower end opening / closing surface of the upper / lower shutter member is brought close to. It is to be housed in a fixed position.

The gist of the ninth invention is a roller transport type firing furnace having a tunnel-shaped furnace body and heat-treating a material to be heated transported by a plurality of transfer rollers penetrating the furnace body in the width direction. A shutter device for a roller-conveying firing furnace that divides the space inside the furnace into a plurality of heating regions in the longitudinal direction of the space, and is driven in the vertical direction and is provided with an upper and lower shutter member inside the furnace. The shutter case includes a shutter case fixed to the furnace body, accommodating the upper and lower shutter members and guiding them in the vertical direction, and the shutter case is composed of a laminated body of heat insulating plate materials laminated in the vertical direction. A pair of support rods protruding downward from the lower end of the upper and lower shutter members through between a pair of adjacent transfer rollers among the plurality of transfer rollers, and the pair of support rods arranged below the furnace body. The purpose is to include a shutter driving device that drives the upper and lower shutter members in the vertical direction and positions them at the open position and the closed position.

According to the shutter device of the roller transfer type firing furnace of the third invention, the plurality of transfer rollers include a plurality of transfer rollers located below the upper and lower shutter members and arranged at regular core intervals . Since the upper and lower shutter members are made of a plate-like fibrous heat insulating material made of ceramic fibers having a thickness larger than the fixed core spacing, high heat insulating properties can be obtained. The heat insulating performance between the divided heating regions is enhanced, and the temperature difference between the heating regions can be steeply formed. Moreover, the furnace length can be shortened.

According to the roller conveyor kiln shutter device of the fourth invention, the upper and lower shutter member, than the core gap between the pair of conveying rollers adjacent groups out of the conveying rollers of the plurality of said arranged at regular core spacing It has a large thickness and a pair of concave grooves formed on the ridges between the lower end opening / closing surface and the front and rear surfaces in order to avoid interference with the pair of transport rollers, and is lowered to the closed position. In this state, the lower end opening / closing surface is located between the transport rollers. From this, since the entire upper and lower shutter members can be made of a relatively thick heat insulating material, sufficient heat insulating performance between the heating regions can be obtained, and a temperature difference between the heating regions can be steeply formed. Further, there is an advantage that the distance between the transport rollers can be reduced and a small object to be heated can be stably transported.

According to the shutter device of the roller transport type firing furnace of the fifth invention, a pair of support rods protruding downward from the lower end portion of the upper and lower shutter members through the plurality of transport rollers arranged at a fixed core interval , A shutter drive device which is arranged under the furnace body and drives the upper and lower shutter members in the vertical direction via the pair of support rods to be positioned at an open position and a closed position is included. In this way, since the shutter drive device is arranged on the lower side of the furnace body, it is not easily affected by the heat of the furnace body. Therefore, a large-scale cooling mechanism device is used for the shutter drive device that drives the upper and lower shutter members up and down. There is no need to provide.

According to the shutter device of the roller transfer type firing furnace of the sixth invention, the shutter case sandwiches two adjacent transfer rollers among the plurality of transfer rollers arranged at a fixed core interval. It has a thickness dimension that is larger than the distance between the pair of transport rollers that are located, and the shutter case has a through hole that allows the two transport rollers to pass through in the width direction, and outside the two transport rollers. A pair of concave grooves are formed in order to avoid interference with the pair of adjacent transport rollers. From this, since the entire upper and lower shutter members can be made of a relatively thick heat insulating material, sufficient heat insulating performance between the heating regions can be obtained, and a temperature difference between the heating regions can be steeply formed. Further, there is an advantage that the distance between the transport rollers can be reduced and a small object to be heated can be stably transported.

According to the shutter device of the roller transport type firing furnace of the seventh invention, the material to be heated which has a tunnel-shaped furnace body and is transported by a plurality of transfer rollers penetrating the furnace body in the width direction is heat-treated. A shutter device for a roller transport type firing furnace that divides the space inside the furnace into a plurality of heating regions in the longitudinal direction of the space in the roller transfer type firing furnace, and is provided in the furnace body by being driven in the vertical direction. The upper and lower shutter members and a shutter case fixed to the furnace body and accommodating the upper and lower shutter members and guiding them in the vertical direction are included, and the shutter case is made of a laminated body of heat insulating plate materials laminated in the vertical direction. The plurality of transfer rollers are configured, and the plurality of transfer rollers include a plurality of transfer rollers located below the upper and lower shutter members and arranged at a constant core interval, and the upper and lower shutter members have the constant core interval. The thickness is larger than the core spacing of a pair of adjacent transport rollers among the plurality of transport rollers arranged in, and between the lower end opening / closing surface and the front and rear surfaces in order to avoid interference with the pair of transport rollers. The lower end opening / closing surface is located between the pair of transport rollers when the ridges of the ridges are each provided with a pair of concave grooves and the lower end opening / closing surface is lowered to a closed position. From this, since the entire upper and lower shutter members can be made of a relatively thick heat insulating material, sufficient heat insulating performance between the heating regions can be obtained, and a temperature difference between the heating regions can be steeply formed. Further, there is an advantage that the distance between the transport rollers can be reduced and a small object to be heated can be stably transported.

According to the shutter device of the roller transport type firing furnace of the eighth invention, the shutter case is larger than the core spacing of a pair of adjacent transport rollers among the plurality of transport rollers arranged at the constant core spacing. the thickness, and a pair of concave grooves which are formed respectively on the edge portion between the upper cover face and the front and rear surfaces in order to avoid interference with the pair of conveying rollers, is positioned between the pair of conveying rollers In a state where the upper and lower shutter members are lowered to the closed position, the fixed shutter member fixed to the furnace body has the upper end opening and closing surface to which the lower end opening and closing surfaces of the upper and lower shutter members are brought close to each other. , Accommodate in a fixed position. From this, since the entire upper and lower shutter members can be made of a relatively thick heat insulating material, sufficient heat insulating performance between the heating regions can be obtained, and a temperature difference between the heating regions can be steeply formed. Further, there is an advantage that the distance between the transport rollers can be reduced and a small object to be heated can be stably transported.

According to the shutter device of the roller transport type firing furnace of the ninth invention, the material to be heated which has a tunnel-shaped furnace body and is transported by a plurality of transfer rollers penetrating the furnace body in the width direction is heat-treated. A shutter device for a roller transport type firing furnace that divides the space inside the furnace into a plurality of heating regions in the longitudinal direction of the space in the roller transport type firing furnace, and is provided in the furnace body by being driven in the vertical direction. The upper and lower shutter members and a shutter case fixed to the furnace body and accommodating the upper and lower shutter members and guiding them in the vertical direction are included, and the shutter case is made of a laminated body of heat insulating plate materials laminated in the vertical direction. It is configured so that a pair of support rods protruding downward from the lower end of the upper and lower shutter members through between a pair of adjacent transport rollers among the plurality of transport rollers and a pair of support rods are arranged below the furnace body. The shutter driving device includes a shutter driving device that drives the upper and lower shutter members in the vertical direction via the pair of support rods to position them in the open position and the closed position. In this way, since the shutter drive device is arranged on the lower side of the furnace body, it is not easily affected by the heat of the furnace body. Therefore, a large-scale cooling mechanism device is used for the shutter drive device that drives the upper and lower shutter members up and down. There is no need to provide.

Claims (11)

In a roller-conveying firing furnace that has a tunnel-shaped furnace body and heat-treats a material to be heated that is transported by a plurality of transport rollers that penetrate the furnace body in the width direction, the space inside the furnace body is the length of the space. A shutter device for a roller-conveying firing furnace that divides into a plurality of heating regions in the direction.
The upper and lower shutter members, which are driven in the vertical direction and are provided in the furnace body,
A shutter case fixed to the furnace body, accommodating the upper and lower shutter members and guiding them in the vertical direction is included.
The shutter case is a shutter device for a roller-conveying firing furnace, which is composed of a laminated body of heat insulating plate materials laminated in the vertical direction. The roller transport according to claim 1, wherein the laminated body of the heat insulating plate material constituting the shutter case is laminated with frame-shaped heat insulating plate materials which are made of ceramic fibers and are bonded to each other by a ceramic bond. Shutter device for type firing furnace. The upper and lower shutter members according to claim 1 or 2, wherein the upper and lower shutter members are made of a fibrous heat insulating plate material made of ceramic fibers and having a thickness larger than the core spacing of the plurality of conveying rollers. Shutter device for roller-conveying firing furnace. The shutter case has an anterior wall and a rear wall in which through holes for passing the material to be heated are formed, and a pair of side walls connecting both ends of the anterior wall and the rear wall in the width direction, respectively. One of claims 1 to 3, wherein the upper and lower shutter members are movably accommodated in the accommodating space formed between the anterior wall and the rear wall and the pair of side walls. The shutter device of the roller transport type firing furnace described. Guide rails are extended in the vertical direction on the inner wall surfaces of the front wall and the rear wall of the shutter case, respectively.
Concave guide grooves into which the guide rails are fitted are formed on the front and rear surfaces of the upper and lower shutter members.
In the upper and lower shutter members, the front and rear surfaces of the upper and lower shutter members are separated from the inner wall surface by a distance smaller than the protrusion dimension of the guide rail from the inner wall surface in the vertical direction by the guide rail. The shutter device for a roller transport type firing furnace according to claim 4, wherein the shutter device is guided. The shutter case has a thickness dimension larger than the distance between the pair of transport rollers located so as sandwiching two adjacent transport rollers among the plurality of transport rollers.
The shutter case has a through hole for passing the two transport rollers in the width direction and a pair of concave grooves for avoiding interference with a pair of transport rollers adjacent to the outside of the two transport rollers. The shutter device for a roller-conveying baking furnace according to any one of claims 1 to 5, wherein the shutter device is formed. The upper and lower shutter members have a thickness larger than the core spacing of a pair of adjacent transport rollers among the plurality of transport rollers, and the lower end opening / closing surface and the front and rear surfaces in order to avoid interference with the transport rollers. The claim is characterized in that it has a pair of concave grooves formed on the ridges between them, and the lower end opening / closing surface is located between the transport rollers in a state of being lowered to a closed position. Item 6. The shutter device for a roller-conveying baking furnace according to any one of items 1 to 6. The shutter case has a thickness larger than the core spacing of a pair of adjacent transport rollers among the plurality of transport rollers, and between the upper end opening / closing surface and the front and rear surfaces in order to avoid interference with the transport rollers. In a state where the upper and lower shutter members are lowered to the closed position and are located between the pair of concave grooves formed on the ridges of the upper and lower shutter members and the transport roller, the lower end opening / closing surfaces of the upper and lower shutter members approach each other. The shutter device for a roller-conveying firing furnace according to claim 7, further comprising the upper end opening / closing surface to be moved and accommodating a fixed shutter member fixed to the furnace body in a fixed position. A pair of support rods protruding downward from the lower end of the upper and lower shutter members through the transfer rollers, and the upper and lower shutter members arranged in the lower side of the furnace body in the vertical direction via the pair of support rods. The shutter device for a roller transport type firing furnace according to any one of claims 1 to 8, further comprising a shutter drive device that is driven to be positioned at an open position and a closed position. The furnace body is supported by a base frame and
The base frame has a lower frame, a support frame protruding upward from the lower frame, and an upper frame supported by the support frame and on which the furnace body is placed.
The shutter device for a roller-conveying baking furnace according to claim 9, wherein the shutter drive device is provided on the upper frame. The shutter drive device is
The upper and lower plates to which the lower ends of the pair of support rods are fixed, and
A vertical guidance device fixed to the upper frame and guiding the upper and lower plates in the vertical direction,
The shutter device for a roller-conveying firing furnace according to claim 10, further comprising an electric motor with a speed reducer, which is fixed to the upper frame and drives the upper and lower plates in the vertical direction.

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