CN111457720A - Heat treatment furnace - Google Patents

Abstract

The invention provides a heat treatment furnace, which is suitable for supporting a heat insulation material when a conveying roller penetrates the heat insulation material arranged in the furnace. The heat treatment furnace performs heat treatment on the object to be treated. The heat treatment furnace is provided with: a furnace body having a heat treatment space for heat-treating an object to be treated; a heat insulating member covering an inner surface of the furnace body; a plurality of conveying rollers disposed in the furnace body, and having end portions thereof disposed outside the furnace body by penetrating the heat insulating material and the furnace body; a driving device that drives the plurality of conveying rollers; and a support member disposed in the heat insulator and having a mechanical strength higher than that of the heat insulator. The support member has a through hole penetrating in the axial direction of the conveying roller. A feed roller is disposed in the through hole.

Description

Heat treatment furnace

Technical Field

The technology disclosed in the present specification relates to a heat treatment furnace for heat-treating an object to be treated.

Background

A heat treatment furnace (e.g., a roller kiln) may be used to heat-treat the object to be treated. Such a heat treatment furnace is provided with a plurality of conveying rollers, and conveys a treatment object by rotating the conveying rollers in a state where the treatment object is placed on the conveying rollers. For example, patent document 1 discloses an example of a heat treatment furnace.

Documents of the prior art

Patent document

Patent document 1: japanese patent laid-open publication No. 2016-156612

Disclosure of Invention

(problems to be solved by the invention)

In such a heat treatment furnace, conveying rollers provided in the furnace penetrate the furnace body, protrude outside the furnace, and are connected to a driving device for rotating the conveying rollers outside the furnace. In such a heat treatment furnace, in order to maintain the temperature in the furnace, the space in the furnace is covered with a heat insulator provided on the inner surface of the furnace body. Therefore, the conveying roller also penetrates through a through hole provided in a heat insulator that covers the space in the furnace. Therefore, for example, if the pitch of the conveyance roller is narrowed, the pitch of the through hole of the heat insulator through which the conveyance roller penetrates is also narrowed. That is, the thickness of the heat insulator provided between two adjacent through holes of the heat insulator (i.e., the thickness of the heat insulator in the conveyance direction) is reduced. Thus, the portion of the heat insulator remaining due to the penetration of the feed roller is reduced, and it becomes difficult to support the heat insulator positioned above the portion through which the feed roller penetrates. The present specification discloses a technique suitable for supporting a heat insulator disposed in a furnace when a conveying roller penetrates the heat insulator.

(means for solving the problems)

The heat treatment furnace disclosed in the present specification performs heat treatment on a material to be treated. The heat treatment furnace is provided with: a furnace body having a heat treatment space for heat-treating an object to be treated; a heat insulating member covering an inner surface of the furnace body; a plurality of conveying rollers disposed in the furnace body, and end portions of the plurality of conveying rollers are disposed outside the furnace body by penetrating the heat insulating material and the furnace body; a driving device that drives the plurality of conveying rollers; and a support member disposed in the heat insulator, the support member having a mechanical strength higher than that of the heat insulator. The support member has a through hole penetrating in the axial direction of the conveying roller. A feed roller is disposed in the through hole.

In the heat treatment furnace, a support member having a higher mechanical strength than the heat insulator is disposed inside the heat insulator, and a conveyance roller is disposed in a through hole provided in the support member. Thus, even if the end of the transport roller penetrates the heat insulator and protrudes outside the furnace body, the heat insulator positioned above the portion where the support member is disposed can be supported by the support member.

Drawings

Fig. 1 is a view showing a schematic configuration of a heat treatment furnace according to example 1, and is a vertical cross-sectional view when the heat treatment furnace is cut along a plane parallel to a conveyance direction of a workpiece.

Fig. 2 is a sectional view taken along line II-II of fig. 1, showing a cross-section of the support member taken transversely.

Fig. 3 is an enlarged view of a key portion III of fig. 2.

Fig. 4 is a sectional view taken along line IV-IV of fig. 3.

Fig. 5 is a diagram showing another configuration of the conveying roller and the supporting member.

Fig. 6 is a cross-sectional view taken along line VI-VI of fig. 1, showing a cross-section of a transverse cut made to the strength member.

Fig. 7 is a view showing another structure of the support pin.

Fig. 8 is a view showing a schematic configuration of the heat treatment furnace according to example 2, and is a cross-sectional view when the heat treatment furnace is cut along a plane perpendicular to a conveyance direction of a workpiece.

Fig. 9 is an enlarged view of a key portion IX of fig. 8.

Fig. 10 is a cross-sectional view taken along line X-X of fig. 9.

Fig. 11 is a sectional view showing the structure of the support member of example 3.

Detailed Description

The main features of the embodiments described below are listed in advance. The technical elements described below are independent technical elements, and are not limited to the combinations described in the claims at the time of filing because they exhibit technical usefulness alone or in various combinations.

(feature 1) in the heat treatment furnace disclosed in the present specification, the number of the support members arranged may be set to be less than the number of the plurality of conveying rollers. Some of the plurality of conveying rollers may penetrate the heat insulator through the through-hole, while the remaining conveying rollers may penetrate the heat insulator without passing through the through-hole. According to this configuration, since the number of the supporting members is smaller than the number of the conveying rollers, the supporting members are disposed so as to be partially removed from the conveying rollers. Therefore, the conveying roller is also disposed between two adjacent support members, and the pitch of the conveying roller can be narrowed. This makes it possible to narrow the pitch of the conveying rollers and to support the heat insulator by the support member.

(feature 2) in the heat treatment furnace disclosed in the present specification, 2 or more excess conveying rollers may be disposed between two adjacent ones of the partial conveying rollers in a section of at least a part of the conveying path. In this case, the remaining conveying roller and a part of the conveying rollers adjacent to the remaining conveying roller may be arranged to be spaced apart from each other by a first pitch. The remaining conveying rollers and the remaining conveying rollers adjacent to the remaining conveying rollers may be disposed to be spaced apart from each other by a second interval. The second pitch may be smaller than the first pitch. With this configuration, when the transport rollers (i.e., the remaining transport rollers) that penetrate the heat insulator without passing through the support member are continuously arranged, the pitch between the transport rollers (i.e., the second pitch) can be reduced. Thus, the plurality of transport rollers are arranged at unequal pitches in at least a part of the transport path, and the pitch of the transport rollers can be partially narrowed. Therefore, both narrowing of the pitch of the conveying rollers and supporting of the heat insulator by the supporting member can be achieved.

(feature 3) the heat treatment furnace disclosed in the present specification may further include a reinforcing material that is disposed in the heat insulating material and has a mechanical strength higher than that of the heat insulating material. The reinforcement member may be located above the position of the conveying roller. With this configuration, the reinforcing material is disposed above the position through which the conveying roller penetrates, that is, above the support member. Therefore, the heat insulator positioned above the support member can be supported more appropriately.

(feature 4) in the heat treatment furnace disclosed in the present specification, the reinforcing material may include: a first reinforcing member which is present at a position from the outer surface of the furnace body to the inside of the heat insulator; and a second reinforcing member which is present at a position from the surface of the heat treatment space side of the heat insulator to the inside of the heat insulator. The first reinforcing member and the second reinforcing member may be disposed to be separated from each other, and have an overlapping portion when the furnace body is viewed in plan. With this configuration, since the first reinforcing member is separated from the second reinforcing member, it is possible to avoid the first reinforcing member and the second reinforcing member from forming a heat transfer path that penetrates from the heat treatment space to the outside of the furnace body. Therefore, the heat in the heat treatment space can be suppressed from escaping to the outside. The first reinforcing member and the second reinforcing member are arranged to have overlapping portions in a plan view. Therefore, even if 2 reinforcing members are disposed so as to be separated, the heat insulator can be sufficiently supported.

(feature 5) in the heat treatment furnace disclosed in the present specification, the heat shield may include a plurality of heat insulating members stacked in a direction perpendicular to the inner surface of the furnace body. The first reinforcing member and the second reinforcing member may be disposed inside 2 or more heat insulating members among the plurality of heat insulating members. With this configuration, the first reinforcing member and the second reinforcing member are disposed across the plurality of heat insulating members, and therefore the heat insulator can be appropriately reinforced.

(feature 6) in the heat treatment furnace disclosed in the present specification, the heat insulating material may include: an upper member disposed above the conveying roller; and a lower member disposed below the conveying roller. The support member may be disposed between the upper member and the lower member. With this configuration, the support member can be provided after the lower member is provided, and the upper member can be provided thereafter. Therefore, the support member can be easily installed.

(feature 7) in the heat treatment furnace disclosed in the present specification, the heat insulating member may be formed of a first tile. The support member may be formed of a second tile or a block made of ceramic having a mechanical strength higher than that of the first tile. With this configuration, the upper member can be appropriately supported by the second tile or the ceramic block having higher mechanical strength than the first tile.

(feature 8) in the heat treatment furnace disclosed in the present specification, the support member may have an upper surface and a lower surface. The upper surface of the support member may be arranged parallel to the lower surface of the upper member. The lower surface of the support member may be arranged parallel to the upper surface of the lower member. The upper and lower surfaces of the support member may be horizontal. With this configuration, the support member can be stably arranged between the upper member and the lower member of the heat insulator. Further, "horizontal" includes not only a strict horizontal but also a substantially horizontal plane and the like.

(feature 9) in the heat treatment furnace disclosed in the present specification, the support member may further include a support portion that extends in the conveyance direction and is perpendicular to the upper surface and the lower surface of the support member. The pitch between the conveying rollers adjacent via the support portion may be larger than the pitch between the conveying rollers adjacent without via the support portion. With this configuration, the plurality of conveying rollers can be arranged at unequal pitches, and the pitches of the conveying rollers can be partially narrowed. Therefore, both narrowing of the pitch of the conveying rollers and supporting of the heat insulator by the supporting member can be achieved.

(feature 10) the heat treatment furnace disclosed in the present specification may further include a support plate that extends in the conveyance direction and supports 2 or more upper members. The support plate may be configured to contact an upper surface of the support member. With this configuration, 2 or more upper members adjacent to each other in the conveying direction can be supported by the support plate. For example, if the dimension of the upper member in the conveying direction is smaller than the pitch between the adjacent support members, it is difficult to provide the upper member on the upper surface of the support member. By providing the support plate, 2 or more upper members adjacent to each other in the conveying direction can be easily provided.

(examples)

(example 1)

The heat treatment furnace 10 according to the example will be described below. As shown in fig. 1, the heat treatment furnace 10 includes a furnace body 20 and a conveyor (52, 54) for conveying the object 12 to be treated. While the conveyance device conveys the object 12 to be treated in the furnace body 20, the heat treatment furnace 10 performs heat treatment on the object 12 to be treated. In fig. 1, a heat insulator 60 (described later) disposed in the furnace body 20 is omitted for the sake of easy drawing.

Examples of the object 12 include a laminate in which a ceramic dielectric (substrate) and an electrode are laminated, and a positive electrode material or a negative electrode material of a lithium ion battery. When the ceramic laminate is heat-treated in the heat treatment furnace 10, the ceramic laminate can be placed on a flat setter and conveyed in the furnace. When the positive electrode material or the negative electrode material of the lithium ion battery is heat-treated in the heat treatment furnace 10, the positive electrode material or the negative electrode material can be stored in a box-shaped magazine and transported in the furnace. In the heat treatment furnace 10 of the present embodiment, a plurality of setter plates and saggers can be placed on and conveyed by a conveyor roller 52 (described later) in a state of being aligned in the conveying direction. Hereinafter, in the present embodiment, the whole of the heat-treated material, the setter on which the heat-treated material is placed, and the container is referred to as "the object to be treated 12".

As shown in fig. 1 and 2, the furnace body 20 is surrounded by a top wall 22a, a bottom wall 22b, and side walls 22c to 22f, and a space 24 is provided inside the furnace body 20. The furnace body 20 has a substantially rectangular shape, and the top wall 22a is disposed parallel to the bottom wall 22b (i.e., parallel to the XY plane). As shown in fig. 1, the side wall 22c is disposed at the entrance end of the conveying path, and is disposed perpendicularly to the conveying direction (i.e., parallel to the YZ plane). The side wall 22d is disposed at the exit end of the conveyance path, and is disposed parallel to the side wall 22c (i.e., parallel to the YZ plane). As shown in fig. 2, the side walls 22e and 22f are arranged parallel to the conveying direction and perpendicular to the top wall 22a and the bottom wall 22b (i.e., parallel to the XZ plane). As shown in fig. 1, an opening 26 is formed in the side wall 22c, and an opening 28 is formed in the side wall 22 d. The object 12 to be treated is conveyed by the conveying means from the opening 26 into the heat treatment furnace 10, and is conveyed from the opening 28 to the outside of the heat treatment furnace 10. That is, the opening 26 serves as a carrying-in port, and the opening 28 serves as a carrying-out port.

A plurality of conveying rollers 52 and a plurality of heaters 30 and 32 are disposed in the space 24. The heaters 30 are disposed at equal intervals in the conveying direction at positions above the conveying rollers 52, and the heaters 32 are disposed at equal intervals in the conveying direction at positions below the conveying rollers 52. The space 24 is heated by heating the heaters 30 and 32. In the present embodiment, the heaters 30 and 32 are arranged at equal intervals in the conveying direction, but the present invention is not limited to such a configuration. The heater may be disposed at a desired position, for example, as appropriate depending on the type of the object 12 to be processed, the conditions of the heat treatment in the heat treatment furnace 10, and the like. In the present embodiment, the heaters 30 and 32 are disposed in the space 24, but the present invention is not limited to such a configuration. As long as the space 24 can be heated, for example, a gas burner or the like may be provided in the space 24.

As shown in fig. 2, in the heat treatment furnace 10, a heat insulator 60 is disposed so as to cover the inner surface of the furnace body 20. The heat insulator 60 includes a plurality of flat plate-shaped heat insulating plates 62 (see fig. 3). The heat insulating plate 62 is disposed parallel to the inner surface of the furnace body 20, and a plurality of heat insulating plates 62 are stacked in a direction perpendicular to the inner surface of the furnace body 20. Specifically, a plurality of (7 in the present embodiment) heat insulating plates 62 are stacked in parallel with the side walls 22e, 22f on the inner surfaces of the side walls 22e, 22f (i.e., the outer walls parallel to the XZ plane of the furnace body 20). The innermost heat insulating plate 62 disposed on the inner surface of the side wall 22e is separated from the innermost heat insulating plate 62 disposed on the inner surface of the side wall 22f, and the space 24 is provided therebetween. Although not shown, a plurality of (7 in the present embodiment) heat insulating plates 62 are stacked on the inner surfaces of the side walls 22c and 22d in the same manner as the side walls 22e and 22f, and the space 24 is provided between the heat insulating plates 62 disposed on the innermost sides of the side walls 22c and 22 d. Also, a plurality of (7 in the present embodiment) heat insulating plates 62 are laminated on the inner surfaces of the ceiling wall 22a and the bottom wall 22b (i.e., the outer walls parallel to the XY plane of the furnace body 20) in parallel with the ceiling wall 22a and the bottom wall 22 b. The innermost heat insulating plate 62 disposed on the inner surface of the top wall 22a is separated from the innermost heat insulating plate 62 disposed on the inner surface of the bottom wall 22b, and the space 24 is provided therebetween. Therefore, the 6 surfaces of the rectangular parallelepiped space 24 are surrounded by the heat insulator 60. In the following description, in the stacking direction of the plurality of heat insulating plates 62, the furnace body 20 (i.e., the top wall 22a, the bottom wall 22b, and the side walls 22e and 22f) side is sometimes referred to as "outer side", and the space 24 side is sometimes referred to as "inner side". In the following description, when 7 heat insulating panels 62 need to be distinguished, they are described by using a letter of a letter (refer to fig. 3) like the heat insulating panels 62a to 62g, and when it is not necessary to distinguish, they may be described as.

In the present embodiment, the same kind of heat insulating plates 62 are laminated on the inner surfaces of the 6 walls of the furnace body 20 in a group of 7, but the kind of the heat insulating plates 62 to be laminated is not particularly limited, and different kinds of heat insulating plates may be laminated. Further, although 7 heat insulating plates 62 are disposed on the inner surfaces of the top wall 22a, the bottom wall 22b, and the side walls 22c, 22d, 22e, and 22f, respectively, the number of the heat insulating plates 62 to be stacked is not limited. The type and number of the thermal insulation plates to be stacked can be changed as appropriate depending on the heat treatment conditions and the like. Inside the heat insulator 60, the support member 70, the reinforcing member 80, and the support pin 90 are disposed. The support member 70, the reinforcement member 80, and the support pin 90 will be described in detail later.

The transport device includes a plurality of transport rollers 52, a drive device 54, and a control device 56. The conveying device conveys the object 12 to be treated from the opening 26 of the furnace body 20 into the space 24, and conveys the object 12 to be treated from the opening 26 to the opening 28 in the space 24. Then, the conveying device conveys the object to be treated 12 from the opening 28 to the outside of the furnace body 20. The object 12 to be processed is conveyed by the conveying rollers 52.

The conveying roller 52 is cylindrical, and its axis extends in a direction perpendicular to the conveying direction (i.e., in the Y direction). The plurality of transport rollers 52 all have substantially the same diameter and are arranged at regular intervals in the transport direction. The conveying roller 52 is supported rotatably about its axis, and is rotated by a driving force transmitted to the driving device 54. The dimension of the transport rollers 52 in the axial direction is larger than the dimension of the furnace body 20 in the direction horizontal and perpendicular to the transport direction (i.e., the Y direction), and both ends of the transport rollers 52 in the axial direction penetrate the heat insulator 60 and the side walls 22e and 22f and protrude outside the furnace body 20. One end (end on the + Y direction side in fig. 2) of the transport roller 52 is connected to a drive device 54 outside the furnace body 20, and the other end (end on the-Y direction side in fig. 2) is a free end. Some of the plurality of conveying rollers 52 disposed in the furnace body 20 penetrate a support member 70 (described later) disposed in the heat insulator 60.

The driving device 54 is a driving device (e.g., a motor) that drives the conveying roller 52. The drive device 54 is connected to the conveying roller 52 via a power transmission mechanism. When the driving force of the driving device 54 is transmitted to the conveying roller 52 via the power transmission mechanism, the conveying roller 52 rotates. As the power transmission mechanism, a known power transmission mechanism, for example, a mechanism based on a sprocket and a chain can be used. The driving device 54 drives each of the conveying rollers 52 so that the conveying rollers 52 rotate at substantially the same speed. The drive device 54 is controlled by a control device 56.

Next, the operation of the heat treatment furnace 10 when heat-treating the object 12 will be described. To heat-treat the object 12, first, the heaters 30 and 32 are operated to set the atmospheric temperature of the space 24 to a predetermined temperature. Next, the object 12 is placed on the conveying rollers 52. Next, the driving device 54 is operated to transport the object 12 to be treated from the opening 26 of the heat treatment furnace 10 to the opening 28 of the heat treatment furnace 10 through the space 24. Thereby, the object 12 is heat-treated. In the embodiment, as shown in fig. 2, 1 object to be treated 12 is placed on the conveying roller 52 in the axial direction (i.e., Y direction) and conveyed in the heat treatment furnace 10, but the present invention is not limited to such a configuration. For example, the heat treatment furnace may be configured to convey the objects 12 in a state where a plurality of objects 12 are aligned in the axial direction of the conveying rollers 52.

Here, the support member 70, the reinforcement 80, and the support pin 90 will be described. As described above, the space 24 in the furnace body 20 is surrounded by the heat insulator 60, and the end of the transport roller 52 penetrates the heat insulator 60 and the side walls 22e and 22f and protrudes outside the furnace body 20. Therefore, the heat insulator 60 is provided with a through hole through which the end of the conveyance roller 52 passes. In the portion of the heat insulator 60 through which the conveying roller 52 penetrates, the thickness of the heat insulator 60 between adjacent through holes may be small. In particular, if the pitch at which the transport rollers 52 are provided is narrowed, the thickness of the heat insulator 60 provided between the through holes of the heat insulator 60 is reduced. In this way, the mechanical strength is reduced in the portion where the thickness of the heat insulator 60 is reduced, and it is difficult to support the heat insulator 60 positioned above the portion. Therefore, the support member 70, the reinforcing member 80, and the support pin 90 are disposed to appropriately support the heat insulator 60 above the portion through which the conveying roller 52 passes.

First, the support member 70 is explained. As shown in fig. 2, the support member 70 is disposed in the heat insulator 60 disposed in parallel with the side walls 22e and 22f with 2 tiles 68a and 68b interposed therebetween. As shown in fig. 2 and 3, the support member 70 includes: an outer support member 72 disposed in the vicinity of the side walls 22e and 22 f; and an inner support member 76 disposed in the vicinity of the space 24. The outer support member 72 has a tubular shape and has a through hole 74 therein. The inner support member 76 has a tubular shape and has a through hole 78 therein. The outer support member 72 and the inner support member 76 are formed of a member having higher mechanical strength than the heat insulator 60 and having fire resistance, and in the present embodiment, ceramic is used. The outer support member 72 and the inner support member 76 are not limited to ceramics, as long as they are formed of a member having higher mechanical strength than the heat insulator 60 and having fire resistance. Tiles 68a are disposed on the upper side of the outer support member 72, and tiles 68b are disposed on the lower side of the outer support member 72. The dimension in the Y direction of the tiles 68a and 68b arranged vertically on the outer support member 72 (i.e., the axial direction of the outer support member 72) substantially coincides with the dimension in the Y direction of the outer support member 72. Further, tiles 68a are disposed on the upper side of the inner support member 76, and tiles 68b are disposed on the lower side of the inner support member 76. The dimension in the Y direction of the tiles 68a and 68b arranged vertically on the inner support member 76 (i.e., the axial direction of the inner support member 76) substantially coincides with the dimension in the Y-line direction of the inner support member 76.

The dimension in the axial direction (Y direction in fig. 3) of the outer support member 72 and the dimension in the axial direction (Y direction in fig. 3) of the inner support member 76 are set to be smaller than the dimension in the stacking direction (i.e., Y direction) of the heat insulating boards 62 of the heat insulator 60, respectively. The total value of the axial dimension of the outer support member 72 and the axial dimension of the inner support member 76 is set to be smaller than the dimension of the heat insulating plate 62 of the heat insulator 60 in the stacking direction. In the present embodiment, the dimension of the outer support member 72 in the axial direction substantially matches the total thickness of the 2 heat insulating plates 62b and 62c disposed at the 2 nd and 3 rd from the outer side. The dimension of the inner support member 76 in the axial direction substantially coincides with the total thickness of the 2 heat shield plates 62e and 62f disposed at the 2 nd and 3 rd from the inner side. The through holes 74 and 78 have substantially the same diameter and are larger than the diameter of the conveying roller 52 (see fig. 4).

As shown in fig. 2 and 3, the outer support member 72 and the inner support member 76 are disposed in series inside the heat insulator 60 disposed on the inner surfaces of the side walls 22e and 22 f. Specifically, the outer support member 72 and the inner support member 76 are arranged in the stacking direction inside the heat insulating plate 62 arranged on the inner surfaces of the side walls 22e and 22 f. Lateral support member 72 and medial support member 76 are configured to coincide with the axis of lateral support member 72 and the axis of medial support member 76. Therefore, when the outer support member 72 and the inner support member 76 are viewed from the axial direction, the through holes 74 and 78 substantially coincide with each other. In addition, the outer support member 72 and the inner support member 76 are arranged so as to be separated in the axial direction. In the present embodiment, the outer support member 72 and the inner support member 76 are separated by as much as the thickness of the heat shield plate 62d of the 4 th from the outer side. Therefore, in the present embodiment, among the 7 heat insulating boards 62a to 62g, the outer support member 72 and the tiles 68a and 68b are disposed on the 2 nd and 3 rd heat insulating boards 62b and 62c from the outer side, the inner support member 76 and the tiles 68a and 68b are disposed on the 2 nd and 3 rd heat insulating boards 62e and 62f from the inner side, and the support member 70 and the tiles 68a and 68b are not disposed on the heat insulating boards 62a, 62d and 62 g. Therefore, the heat insulating plates 62b and 62c on which the outer support member 72 and the tiles 68a and 68b are arranged are sandwiched by the heat insulating plates 62a and 62d on which the support member 70 and the tiles 68a and 68b are not arranged, and the heat insulating plates 62e and 62f on which the inner support member 76 and the tiles 68a and 68b are arranged are sandwiched by the heat insulating plates 62d and 62g on which the support member 70 and the tiles 68a and 68b are not arranged. Thus, the support member 70 and the tiles 68a and 68b are arranged, thereby suppressing the reduction of the heat insulating performance. The outer support member 72 and the inner support member 76 are disposed at a height at which the center of the axis of the outer support member 72 and the center of the axis of the inner support member 76 substantially coincide with the center of the axis of the conveying roller 52. The conveying roller 52 is disposed in the through holes 74 and 78.

As shown in fig. 4, the support member 70 (i.e., the outside support member 72 and the inside support member 76) is configured to be separated in the conveying direction (i.e., the X direction). Specifically, 1 conveying roller 52 is disposed between 2 support members 70 disposed adjacent to each other. The conveying roller 52 disposed between the adjacent support members 70 penetrates the heat insulator 60 (specifically, disposed between the heat insulator 60 and the tiles 68a and 68b inside the heat insulator 60) so as not to penetrate the support members 70. Therefore, some of the plurality of conveying rollers 52 are disposed in the heat insulator 60 so as to pass through the through holes 74 and 78 provided in the support member 70, and the remaining conveying rollers 52 are disposed in the heat insulator 60 without passing through the support member 70. In the present embodiment, the conveying rollers 52 that penetrate the heat insulator 60 via the support member 70 and the conveying rollers 52 that penetrate the heat insulator 60 without passing through the support member 70 are alternately arranged. The heat insulating plates 62b, 62c, 62e, and 62f on which the support member 70 is disposed are divided vertically at the height at which the support member 70 is disposed, and tiles 68a and 68b are disposed therebetween. A space is provided between the tiles 68a, 68b, and in this space, not only the support members 70 (and the conveying rollers 52 disposed in the through holes (74, 78) thereof) but also the conveying rollers 52 disposed directly between the adjacent support members 70 are disposed. The tiles 68a and 68b are provided with recesses 64 at positions where the support members 70 are disposed. The recess 64 extends in the axial direction of the support member 70, and is formed in a shape following the outer surface of the support member 70. The support member 70 is positioned based on the recess 64. In the present embodiment, the heat insulating plates 62b, 62c, 62e, and 62f on which the support member 70 is disposed are divided vertically at the height at which the support member 70 is disposed, and the tiles 68a and 68b are disposed therebetween, but the present invention is not limited to this configuration. For example, the heat insulating plates 62b, 62c, 62e, and 62f may be formed with through holes through which the supporting member 70 passes and through which the conveying roller 52 that does not pass through the supporting member 70 passes.

For example, when the support member 70 is not disposed, all the transport rollers 52 are disposed in the through-holes provided in the heat insulator 60 without passing through the support member 70. Since all the conveying rollers 52 are disposed at the same height, the heat insulator 60 is present only between the adjacent conveying rollers 52 at the height at which the conveying rollers 52 are disposed. Therefore, the dimension of the heat insulator 60 in the conveyance direction (X direction) at the height at which the conveyance roller 52 is disposed is reduced, and the heat insulator 60 above the position at which the conveyance roller 52 is disposed may not be supported. This problem becomes conspicuous particularly if the pitch of the conveying rollers 52 is narrowed. In the present embodiment, the support member 70 is disposed in the heat insulator 60, and the conveying roller 52 is disposed in the through- holes 74, 78 of the support member 70. By disposing the support member 70 in this manner, even if the end of the transport roller 52 penetrates the heat insulator 60 and protrudes outside the furnace body 20, the heat insulator 60 positioned above the portion where the support member 70 is disposed can be supported by the support member 70.

In addition, in the present embodiment, the outer support member 72 and the inner support member 76 are arranged so as to be separated in the axial direction. For example, when the support member is disposed so as to penetrate the entire stacked heat insulation plates 62a to 62g, the heat in the space 24 is transmitted from the inside to the outside via the support member, and is easily released to the outside of the furnace body 20. In the present embodiment, by disposing the outer support member 72 and the inner support member 76 so as to be separated in the axial direction, the heat transferred to the inner support member 76 is thermally insulated by the heat insulating plate 62d disposed between the outer support member 72 and the inner support member 76, and is less likely to be transferred to the outer support member 72. Therefore, the heat in the space 24 can be prevented from escaping to the outside of the furnace body 20.

In the present embodiment, not all of the conveying rollers 52 are inserted through the support member 70, but only a part of the conveying rollers 52 (about half of the conveying rollers 52 in the present embodiment) are inserted through the support member 70. This can prevent the pitch of the conveying rollers 52 from becoming wider. That is, the heat insulator 60 can be supported by the support member 70, and the distance between the transport rollers 52 can be prevented from being increased.

In the present embodiment, the conveying roller 52 (hereinafter, also referred to as conveying roller 52a) penetrating the heat insulator 60 through the support member 70 and the conveying roller 52 (hereinafter, also referred to as conveying roller 52b) penetrating the heat insulator 60 without the support member 70 are alternately arranged, but the present invention is not limited to such a configuration. For example, as shown in fig. 5, 2 or more conveying rollers 52b may be disposed between adjacent support members 70. In this case, the conveying rollers 52a and 52b may be arranged at unequal intervals in the conveying direction. Specifically, the pitch P1 between the conveying roller 52a and the conveying roller 52b is widened by the support member 70 disposed around the conveying roller 52 a. On the other hand, since the support member 70 is not positioned between the 2 conveying rollers 52b, the pitch P2 between the 2 conveying rollers 52b can be set narrow. By setting the pitch P1 and the pitch P2 to have different lengths in this way, the conveying rollers 52 can be arranged at unequal pitches on the entire conveying path, and the pitch of the conveying rollers 52 can be partially narrowed. For example, when the mass of the object 12 is large, the diameter of the transport rollers 52 needs to be increased to improve the mechanical strength, and the interval between the transport rollers 52 needs to be narrowed to support the object 12 by the plurality of transport rollers 52. By narrowing the distance between the transport rollers 52b, even when the support member 70 is disposed, the distance between the transport rollers 52 can be partially narrowed, and the object 12 having a large mass can be transported.

In the present embodiment, the outer support member 72 and the inner support member 76 are tubular, but the present invention is not limited to such a configuration. The outer support member 72 and the inner support member 76 are not particularly limited in outer shape as long as they have through holes 74 and 78 through which the end portions of the conveyance roller 52 pass and can support the heat insulator 60.

Next, the reinforcing member 80 will be described. As shown in fig. 6, the reinforcing member 80 is disposed in the heat insulator 60 disposed parallel to and adjacent to the side walls 22e and 22 f. The reinforcing material 80 is disposed at a height above the position of the heat insulator 60 through which the conveying roller 52 penetrates. The reinforcing member 80 includes: an outer reinforcing member 82 disposed in the vicinity of the side walls 22e and 22 f; and an inner reinforcing member 84 disposed in the vicinity of the space 24. The outer reinforcement member 82 and the inner reinforcement member 84 are disposed apart in the height direction.

The outer reinforcing members 82 are pin-shaped and hit obliquely upward from the outside of the furnace body 20. The outer reinforcing member 82 is disposed parallel to a cross section perpendicular to the conveying direction, and an end portion inside the outer end portion is located above. The angle formed by the axis of the outer reinforcing member 82 and the axis of the conveying roller 52 is 0 degree or more and 40 degrees or less. The outer reinforcing member 82 penetrates several of the heat insulating plates 62, but does not reach the space 24. Therefore, the outer reinforcing member 82 is disposed across several heat insulating panels 62 disposed on the outer side among the plurality of heat insulating panels 62, and does not penetrate several heat insulating panels 62 disposed on the inner side. In the present embodiment, the outer reinforcing member 82 is disposed in the 5 heat insulating plates 62a to 62e disposed on the outer side, but is not disposed in the 2 heat insulating plates 62f and 62g disposed on the inner side. The heat insulating plates 62a to 62e are integrated by the outer reinforcing member 82. Further, the outer reinforcing member 82 is prevented from being pulled out from the heat insulating plates 62a to 62e based on the frictional force acting between the outer reinforcing member 82 and the heat insulating plates 62a to 62e, so that the heat insulating plates 62a to 62e are integrated. In the present embodiment, the outer reinforcing member 82 is obliquely driven in, so that the contact area between the outer reinforcing member 82 and the heat insulating plates 62a to 62e is increased, and the fastening force is improved. In the present embodiment, the outer reinforcing member 82 is disposed only on the heat insulator 60 adjacent to the side walls 22e and 22f, but the outer reinforcing member 82 may be disposed on the heat insulator 60 and the side wall 22e or 22 f. In this case as well, the heat insulator 60 can be integrated with the side wall 22e or the side wall 22f by the outer reinforcing member 82, and the same effect as in the case where the outer reinforcing member 82 is disposed only on the heat insulator 60 can be obtained.

The inner reinforcing member 84 is pin-shaped and is inserted into the heat insulator 60 obliquely downward from the space 24 side. The inner reinforcing member 84 is disposed parallel to the outer reinforcing member 82. Specifically, inner reinforcing member 84 is disposed below outer reinforcing member 82, apart from outer reinforcing member 82. The inner reinforcing member 84 penetrates several of the heat insulating plates 62, but does not reach the side wall 22e or the side wall 22 f. Therefore, the inner reinforcing member 84 is disposed across several heat insulating panels 62 disposed on the inner side among the plurality of heat insulating panels 62, but does not penetrate several heat insulating panels 62 disposed on the outer side. In the present embodiment, the inner reinforcing member 84 is disposed in the 5 heat insulating plates 62c to 62g disposed inside, but is not disposed in the 2 heat insulating plates 62a and 62b disposed outside. The inner reinforcing member 84 is fixed to the heat insulating plates 62c to 62g by its frictional force, and integrates the heat insulating plates 62c to 62 g. The outer reinforcement member 82 and the inner reinforcement member 84 are configured to partially overlap when viewed from a direction (i.e., Z direction) perpendicular to both the conveying direction and the axial direction of the conveying roller 52. In the present embodiment, the outer reinforcement member 82 and the inner reinforcement member 84 are arranged to overlap the heat insulating plates 62c to 62e when viewed in the Z direction. The 7 heat insulating plates 62a to 62g are integrated by the outer reinforcing member 82 and the inner reinforcing member 84.

Further, a metal support member 86 is disposed on the outermost heat insulating board 62a and the side wall 22e or the side wall 22f, the support member 86 has a shape of L, and includes a first portion 86a extending in the axial direction (i.e., the Y direction) of the transport roller 52, and a second portion 86b extending in parallel with the side walls 22e and 22f (i.e., the Z direction), the first portion 86a is fixed to the upper surface of a through hole provided in the heat insulating board 62a and the side walls 22e and 22f for passing the transport roller 52 therethrough, the Y direction dimension of the first portion 86a is substantially equal to the total Y direction dimension of the side walls 22e and 22f, the second portion 86b is perpendicular to the first portion 86a and fixed to the outer side surfaces of the side walls 22e and 22f, the lower end of the second portion 86b is connected to the outer end of the first portion 86a, the support of the outermost heat insulating board 62a to the side wall 22e or the side wall 22f by disposing the support member 86, and the side walls 62 e.g are integrally supported by the plurality of heat insulating boards 62a to 22e and 22f, and the side walls 22e or side walls 22e and 22f are reinforced by the side walls 62a plurality of the side walls 22e or side walls 22e and 22 f.

In the present embodiment, the reinforcement member 80 is disposed at a height position above the position through which the conveyance roller 52 penetrates in the side walls 22e and 22 f. Further, the outer reinforcement member 82 and the inner reinforcement member 84 are disposed across several of the plurality of heat insulation plates 62 disposed on the inner surfaces of the side walls 22e, 22f, respectively. This can integrally support the heat insulating plates 62 arranged in a stacked state, and can suppress the occurrence of separation in the stacking direction. Further, the outermost heat insulating plate 62a is fixed to the side walls 22e and 22f by the support member 86. This can support the plurality of heat insulating plates 62 integrated by the reinforcing member 80. Therefore, the heat insulator 60 positioned above the conveying roller 52 can be appropriately supported.

In the present embodiment, 2 separate members, that is, an outer reinforcing member 82 and an inner reinforcing member 84 are used as the reinforcement 80, and the outer reinforcing member 82 and the inner reinforcing member 84 are disposed separately from each other. For example, when the heat insulating plate 62 is integrated by 1 reinforcing member, the reinforcing member needs to penetrate from the outside of the furnace body 20 to the space 24, and the heat in the space 24 is transmitted from the inside to the outside via the reinforcing member, and is easily released to the outside of the furnace body 20. The reinforcement 80 of the present embodiment includes an outer reinforcement member 82 and an inner reinforcement member 84, and each of the outer reinforcement member 82 and the inner reinforcement member 84 does not penetrate to the space 24 from the outside of the furnace body 20. Therefore, the heat in the space 24 can be prevented from escaping to the outside of the furnace body 20. In addition, outer reinforcing member 82 and inner reinforcing member 84 are configured to: several heat insulating plates 62 (3 heat insulating plates 62c to 62e in the present embodiment) are overlapped as viewed in the Z direction. Thus, the heat insulating board 62 disposed on the inner side and the heat insulating board 62 disposed on the outer side are integrated by the portion where the outer reinforcing member 82 and the inner reinforcing member 84 overlap, and the heat insulator 60 can be appropriately supported. Therefore, the reinforcing material 80 is formed of 2 members, and even if the 2 members are arranged to be separated, the heat insulator 60 can be sufficiently supported.

In the present embodiment, the outer reinforcing member 82 and the inner reinforcing member 84 are disposed such that the angle formed by the axis thereof and the axis of the conveying roller 52 is 0 degree or more and 40 degrees or less. By setting the angle formed by the axis of the outer reinforcing member 82 and the inner reinforcing member 84 and the axis of the conveying roller 52 to 0 degree or more, the heat insulating plate 62 disposed in parallel with the side walls 22e and 22f can be suppressed from being inclined toward the space 24 side. Further, by setting the angle formed by the axis of the outer reinforcing member 82 and the inner reinforcing member 84 and the axis of the conveying roller 52 to 40 degrees or less, the outer reinforcing member 82 and the inner reinforcing member 84 can be prevented from being positioned above the inside of the heat insulating plate 62 disposed inside, and the outer reinforcing member 82 and the inner reinforcing member 84 can be disposed at appropriate positions in the heat insulating plate 62.

Next, the support pin 90 will be described. As shown in fig. 2 and 6, the support pin 90 is disposed in the heat insulator 60 disposed parallel to and adjacent to the top wall 22 a. The support pins 90 are disposed in the stacking direction in the plurality of heat insulating plates 62 disposed adjacent to the top wall 22 a. The support pin 90 penetrates the ceiling wall 22a and all the heat insulating plates 62 stacked and arranged, and is fixed to these heat insulating plates 62. Therefore, the support pins 90 are present at positions extending from the ceiling wall 22a to the space 24 through the plurality of heat insulating plates 62. The end of the support pin 90 on the top wall 22a side is fixed to the top wall 22a outside the furnace body 20. For example, a screw groove is formed at an end of the support pin 90, and a bolt is screwed into the screw groove, thereby fixing the upper end of the support pin 90 to the top wall 22 a. The end of the support pin 90 on the side of the space 24 is fixed to the heat shield plate 62 disposed on the innermost side in the space 24. The fixing structure of the lower end of the support pin 90 can be the same structure as the upper end of the support pin 90. The support pins 90 are not only arranged in plural numbers (3 in the present embodiment) in the axial direction of the conveyance roller 52, but also arranged in plural numbers across the entire heat treatment furnace 10 in the conveyance direction. The support pins 90 can support the heat insulator 60 disposed parallel to and adjacent to the top wall 22a, that is, can support the heat insulator 60 disposed above the space 24.

The support pin 90 of the present embodiment is present at a position penetrating the plurality of heat insulating plates 62 from the top wall 22a to the space 24, but is not limited to such a configuration. The heat insulator 60 disposed adjacent to the top wall 22a may be supported, and for example, as shown in fig. 7, a support pin 92 and a support member 94 may be provided. In fig. 7, the heat insulator 60 disposed adjacent to the ceiling wall 22a includes 6 heat insulating panels 62a to 62f, and the thickness of the heat insulating panel 62f disposed at the innermost side is set to be greater than the thickness of the other heat insulating panels 62a to 62 e. The support pins 92 are disposed in the stacking direction (i.e., the vertical direction) within the plurality of heat insulating plates 62a to 62f disposed adjacent to the ceiling wall 22 a. Specifically, the support pin 92 is present at a position extending from the ceiling wall 22a through the plurality of heat insulating plates 62a to 62e to the inside of the heat insulating plate 62f closest to the space 24. That is, the support pin 92 does not reach the space 24. The end of the support pin 92 on the top wall 22a side is fixed to the top wall 22a outside the furnace body 20. The end of the support pin 90 on the space 24 side is fixed to the support member 94 inside the heat shield plate 62f disposed on the innermost side. The support pins 92 are not only arranged in plural in the axial direction of the transport roller 52, but also arranged in plural across the entire heat treatment furnace 10 in the transport direction (i.e., X direction). The support member 94 is disposed inside the heat insulating plate 62f disposed innermost among the heat insulators 60 disposed adjacent to the ceiling wall 22a, and is integrated with the heat insulating plate 62 f. The support member 94 extends in the conveying direction (i.e., the X direction) below the support pins 92. The lower end portions of the plurality of support pins 92 are fixed to the support member 94. The heat insulator 60 disposed parallel to and adjacent to the top wall 22a, that is, the heat insulator 60 disposed above the space 24 can be supported by the support pins 92 and the support members 94.

(example 2)

In the above embodiment 1, the heat insulator 60 is constituted by the heat insulating plate 62, but is not limited to such a constitution. For example, as shown in FIG. 8, the insulation 160 may be comprised of insulation panels 162 and tiles 168. In the present embodiment, the heat insulator 160 and the support member 170 are different in configuration from the heat insulator 60 and the support member 70 of embodiment 1, but the other configurations are substantially the same. Therefore, the same structure as that of the heat treatment furnace 10 of example 1 will not be described.

As shown in fig. 8, in the heat treatment furnace 110 of the present embodiment, a heat insulator 160 is disposed so as to cover the inner surface of the furnace body 120. The heat insulator 160 is composed of a plurality of flat plate-shaped heat insulating plates 162 and tiles 168. The plurality of heat insulating plates 162 are stacked, and the heat insulating plate 162 disposed on the outermost side is disposed in contact with the furnace body 120 (i.e., the ceiling wall 22a, the bottom wall 22b, and the side walls 22c to 22 f). The tiles 168 are disposed inside the plurality of insulation panels 162. Specifically, tiles 168 are stacked to cover the inside of the innermost heat insulating plate 162. Hereinafter, the tiles (excluding the supporting member 170 described later) disposed inside the heat insulating plates 162 are collectively referred to as "tiles 168".

The tiles 168 covering the heat insulating plate 162 arranged in parallel with the side wall 22e are separated from the tiles 168 covering the heat insulating plate 162 arranged in parallel with the side wall 22f, and the space 124 is provided therebetween. Although not shown, a plurality of heat insulating plates 162 and tiles 168 are also disposed on the inner surfaces of the side walls 22c and 22d, similarly to the side walls 22e and 22f, and a space 124 is provided between the tiles 168 disposed parallel to the side walls 22c and 22d and covering the heat insulating plates 162. Similarly, on the inner surfaces of the ceiling wall 22a and the bottom wall 22b (i.e., the outer walls parallel to the XY plane of the furnace body 20), a plurality of heat insulating plates 162 and tiles 168 are arranged. In detail, the tiles 168 disposed on the inner surface of the top wall 22a are curved so that the central portion thereof protrudes upward (i.e., in the + Z direction). Thus, the tiles 168 arranged above are supported by the adjacent tiles 168. The heat insulating plate 162 disposed between the ceiling wall 22a and the tiles 168 follows the shape of the upper surfaces of the adjacent tiles 168, and the central portion (i.e., the central portion in the Y direction) protrudes upward. The tiles 168 covering the heat insulating plate 162 disposed in the vicinity of the top wall 22a are separated from the tiles 168 covering the heat insulating plate 162 disposed in parallel with the bottom wall 22b, and the space 124 is provided therebetween. Therefore, 6 surfaces of the substantially rectangular parallelepiped space 124 are surrounded by the tiles 168. The plurality of heat insulating plates 162 arranged in the vicinity of the ceiling wall 22a may be supported by support pins, as in example 1.

The end of the feed roller 52 penetrates the heat insulator 160 (i.e., the heat insulating plate 162 and the tiles 168) and the side walls 22e and 22f to protrude outside the furnace body 120. Therefore, the heat insulator 160 (i.e., the heat insulating plate 162 and the tiles 168) is provided with through holes through which the conveyance roller 52 passes. In order to appropriately support the tiles 168 positioned at the upper portion of the through-hole, a support member 170 is provided in the tiles 168. Although not shown in fig. 8, the reinforcement member 80 is disposed on the heat insulating plate 162 in order to support the heat insulating plate 162 positioned above the through hole. In addition, the tubular support member 70 of embodiment 1 may be disposed within the heat insulating plate 162.

The support member 170 will be described. The support member 170 is disposed in a tile 168 disposed parallel to the side walls 22e, 22f and covering the heat insulating plate 162. Hereinafter, the tile 168 located above the support member 170 may be referred to as an upper tile 168a, and the tile 168 located below the support member 170 may be referred to as a lower tile 168b (see fig. 9 and 10). Therefore, the support member 170 is disposed between the upper tile 168a and the lower tile 168 b. The support member 170 is formed of a material having higher mechanical strength than the tile 168. Specifically, the mechanical strength indicates strength against compression (compressive strength). The kind of the support member 170 is not particularly limited. For example, the support member 170 may be a tile formed of a material having a mechanical strength higher than that of the tile 168, or a block made of ceramic. The support member 170 may be made of the same material as the tile 168, and may be a tile having a porosity lower than that of the tile 168 (i.e., having high air tightness) (e.g., a refractory heat-insulating tile such as Hi alumina bubble tile having a porosity of 57%). The support member 170 may be made of a material having a mechanical strength higher than that of the tile 168, and may be a tile having a porosity lower than that of the tile 168. The type of the support member 170 can be appropriately selected according to the type of the object 12 to be heat-treated in the heat treatment furnace 110, the mass of the object 12, the diameter of the conveyance rollers 52, the pitch between the conveyance rollers 52, and the like.

As shown in fig. 9 and 10, the support member 170 has a substantially rectangular parallelepiped outer shape, and the support member 170 has a through hole 174. The dimension of the support member 170 in the axial direction (i.e., the Y direction) substantially coincides with the dimension of the tile 168 in the Y direction, and the support member 170 is disposed so that the position of the support member 170 in the Y direction coincides with the tile 168. The support member 170 has a substantially square outer shape when viewed in the axial direction (i.e., Y direction), and the through-hole 174 also has a substantially square shape when viewed in the axial direction (i.e., Y direction). In other words, the support member 170 is constituted by the upper surface 170a, the lower surface 170b, and the 2 side surfaces 170c, and the through-hole 174 is a space surrounded by the upper surface 170a, the lower surface 170b, and the 2 side surfaces 170 c. The upper and lower surfaces 170a, 170b are substantially horizontal and are disposed substantially parallel to the lower surface of the upper side tile 168a and the upper surface of the lower side tile 168 b. The 2 sides 170c are perpendicular to the upper surface 170a and the lower surface 170b (and the lower surface of the upper side tile 168a and the upper surface of the lower side tile 168 b). The upper surface 170a, the lower surface 170b, and the 2 side surfaces 170c have substantially the same thickness. In addition, in the support member 170, the outer surface corner portion and the inner surface corner portion may be chamfered or R-shaped. The diameter of the through hole 174 is set larger than the diameter of the conveying roller 52. The conveying roller 52 is disposed in the through hole 174 of the support member 170.

In addition, the support members 170 are arranged apart in the conveying direction (i.e., X direction). The conveying roller 52 is also disposed between the 2 support members 170 disposed adjacent to each other. The conveying roller 52 disposed between the adjacent support members 170 is disposed between the upper tile 168a and the lower tile 168b without being disposed in the through hole 174 of the support member 170. Therefore, some of the plurality of conveying rollers 52 are disposed so as to penetrate the through-holes 174 provided in the support member 170, and the remaining conveying rollers 52 are disposed without passing through the support member 170.

In the present embodiment, 2 conveying rollers 52 are disposed between 2 support members 170 disposed adjacent to each other. The pitch P3 between the conveying roller 52 (conveying roller 52a) disposed in the support member 170 and the conveying roller 52 (conveying roller 52b) disposed without the support member 170 is larger than the pitch P4 between 2 conveying rollers 52b disposed between the adjacent support members 170. That is, the plurality of conveying rollers 52 are arranged at unequal intervals in the conveying direction. By narrowing the pitch P4 between the conveying rollers 52b, the number of conveying rollers 52 supporting the object 12 can be increased, and the object 12 having a large mass can be conveyed.

The sizes of the pitches P3 and P4 are set so that 1 object to be processed 12 can be supported at all times by 4 or more conveying rollers 52, and even when 1 conveying roller 52 is broken, the area of the bottom surface of the object to be processed 12 can be supported by 3 or more conveying rollers 52, and the object to be processed 12 can be prevented from falling off the conveying surface, for example, in the present embodiment, the dimension of the object to be processed 12 in the conveying direction is 315mm, the pitch P3 is 82mm, the pitch P4 is 65mm, the pitch P3 between the conveying rollers 52a and 52b arranged via the side surface 170C of the support member 170 is made larger, and the pitch P4 between the conveying rollers 52b arranged without via the support member 170 is made smaller, so that the object to be supported by 4 pieces of the object to be processed 12, the inner diameter of the conveying rollers 52a and 52b is made smaller, and the size of the inner diameter of the conveying rollers 52a + C + 52b of the heat-insulating roller 52C 52 + 52, the heat-supporting members is made larger than the inner diameter of the inner side surface of the conveying rollers 52a + 52b of the conveying rollers 52b 52 of the outer diameter of the heat-52 of the heat-insulating roller 52C + 52b 52, the heat-insulating roller 52, the heat-supporting members 170C + 52, the heat-supporting members 170C + 52, the heat-52, the inner-insulating members 170C-52, the inner-52, the outer diameter of the inner side surface 52b 52, the outer diameter of the inner side surface 52b 52, the inner side surface 52b 52 of the heat-52 b 52, the heat-supporting members is made larger than the heat-52, the outer diameter of the heat-supporting members, the heat-52, the heat-supporting members, the heat-52, the heat-supporting members, the heat-insulating members, the heat-supporting members, the inner-insulating members, the heat-supporting members, the inner-supporting members are made larger than the inner-C-52, the inner-C-52C-52, the inner-C-.

Further, a support plate 176 is disposed on the support member 170. That is, the support plate 176 is disposed in contact with the upper surface 170a of the support member 170. The support plate 176 extends in the conveying direction (i.e., the X direction), and is arranged in contact with the upper surfaces 170a of 2 or more support members 170 adjacent in a separated manner in the conveying direction. The support plate 176 is formed of a material having excellent bending resistance, and is a ceramic plate in this embodiment. The upper tile 168a is disposed on the support plate 176. Therefore, the upper tile 168a is disposed on the support member 170 via the support plate 176. Since the support member 170 is separated in the conveying direction, it is difficult to directly dispose the upper tiles 168a on the upper surface 170a of the support member 170. That is, when the upper tiles 168a are directly arranged on the upper surface 170a of the support member 170, the upper tiles 168a must be sized according to the interval between the arrangement of the support member 170. By disposing the support plate 176, the degree of freedom of the size of the upper tile 168a is improved, and the upper tile 168a can be easily disposed on the support member 170.

In the present embodiment, the support member 170 is formed of a member having higher mechanical strength than the tile 168. Thus, in the present embodiment, even if the end of the transport roller 52 penetrates the heat insulator 160 (i.e., the heat insulating plate 162 and the tiles 168) and protrudes outside the furnace body 120, the upper tiles 168a located above the support members 170 are supported by the support members 170.

In the present embodiment, 2 conveying rollers 52 are disposed between 2 support members 170 disposed adjacent to each other, but the present invention is not limited to such a configuration. If the upper tile 168a can be supported by the support members 170, 3 or more conveying rollers 52 can be disposed between 2 adjacent support members 170.

(example 3)

Although the support member 170 is disposed separately in the conveying direction in embodiment 2, the present invention is not limited to this configuration. For example, as shown in fig. 11, the support members 270 may be arranged continuously in the conveying direction. In the present embodiment, the support member 270 is different from the support member 170 of embodiment 2 in structure, and the other structures are substantially the same. Therefore, the same structure as that of the heat treatment furnace 110 of example 2 will not be described.

As shown in fig. 11, the support member 270 is disposed between the upper tile 168a and the lower tile 168 b. The support member 270 is formed of tiles having a mechanical strength higher than that of the tiles 168. Since tiles similar to those used for the support member 170 of embodiment 2 can be used as the tiles used for the support member 270 of the present embodiment, detailed description thereof is omitted. The support members 270 are continuously provided in the conveying direction (i.e., X direction). The support member 270 is composed of a plurality of refractory tiles arranged in the conveying direction. Hereinafter, the plurality of refractory bricks and tiles arranged in the conveying direction are collectively referred to as "support member 270".

The support member 270 has a first through hole 274 and a second through hole 276 which are different in size. The first through hole 274 has a substantially square shape when viewed along the axis of the conveying roller 52, and is set to be larger than the diameter of the conveying roller 52. 1 conveying roller 52 is disposed in the first through hole 274. The second through-hole 276 has a substantially rectangular shape when viewed along the axis of the conveying roller 52, and is set such that the dimension in the conveying direction (i.e., the dimension in the X direction) is larger than the dimension in the height direction (i.e., the dimension in the Z direction). Specifically, the dimension of the second through hole 276 in the conveying direction is set to be larger than 2 times the diameter of the conveying roller 52, and the dimension in the height direction is set to be larger than the diameter of the conveying roller 52. In the second through hole 276, 2 conveying rollers 52 are arranged in the conveying direction. The support member 270 includes an upper surface 270a, a lower surface 270b, and a support portion 270c disposed between the first through-hole 274 and the second through-hole 276. The upper surface 270a, the lower surface 270b, and the support portion 270c have substantially the same thickness. In the support member 270, the corners of the first through-hole 274 and the second through-hole 276 are machined to have r-shapes.

The pitch P5 between the conveying roller 52 (hereinafter also referred to as the conveying roller 52c) disposed in the first through hole 274 and the conveying roller 52 (hereinafter also referred to as the conveying roller 52d) disposed in the second through hole 276 is wider than the pitch P6 between the conveying rollers 52d disposed in the same second through hole 276. That is, the plurality of conveying rollers 52 are arranged at unequal intervals in the conveying direction. By narrowing the distance between the conveyance rollers 52d, the clearance between the conveyance rollers 52 and the support portion 270c of the support member 270 can be secured without reducing the number of conveyance rollers 52 that support 1 object 12, and interference of the conveyance rollers 52 with the support member 170 can be suppressed, or the object 12 with a higher mass can be conveyed by increasing the diameter of the conveyance rollers 52.

In the present embodiment as well, the support member 270 is formed of a member having a mechanical strength higher than that of the tile 168. Thus, even if the end of the conveying roller 52 penetrates the heat insulator 60 (i.e., the heat insulating plate 162 and the tiles 168) and protrudes outside the furnace body, the upper tiles 168a located above the support members 270 are supported by the support members 270.

In the present embodiment, the second through-hole 276 is configured to have 2 conveying rollers 52 disposed therein, but is not limited to such a configuration. If the upper tile 168a can be supported by the support member 270, the second through-hole may be configured such that 3 or more conveying rollers 52 are disposed therein.

Attention points related to the heat treatment furnace 110 described in the examples are described. In the embodiment, the upper tile 168a is an example of an "upper member", the lower tile 168b is an example of a "lower member", and the side surface 170c is an example of a "support portion".

Specific examples of the technology disclosed in the present specification have been described above in detail, but these are merely examples and do not limit the scope of protection of the patent claims. The techniques described in the claims include various modifications and changes to the specific examples described above. The technical elements described in the specification and the drawings exhibit technical usefulness alone or in various combinations, and are not limited to the combinations described in the claims at the time of filing. In addition, the technology illustrated in the present specification or the drawings achieves a plurality of objects at the same time, and achieving one of the objects itself has technical usefulness.

Claims (11)

1. A heat treatment furnace for heat-treating an object to be treated,

the heat treatment furnace is provided with:

a furnace body having a heat treatment space for heat-treating the object to be treated;

a heat insulating material covering an inner surface of the furnace body;

a plurality of conveying rollers disposed in the furnace body, and end portions of the plurality of conveying rollers are disposed outside the furnace body through the heat insulator and the furnace body;

a driving device that drives the plurality of conveying rollers; and

a support member disposed in the heat insulator, the support member having a mechanical strength higher than that of the heat insulator,

the support member has a through hole penetrating in an axial direction of the transport roller,

the feed roller is disposed in the through hole.

2. The heat treatment furnace according to claim 1,

the supporting members are arranged in a number smaller than the number of the plurality of conveying rollers,

some of the plurality of transport rollers penetrate the heat insulator through the through-hole, and the remaining transport rollers among the plurality of transport rollers penetrate the heat insulator without passing through the through-hole.

3. The heat treatment furnace according to claim 2,

in at least a part of the section of the transport path, 2 or more of the remaining transport rollers are arranged between two adjacent ones of the part of the transport rollers,

the remaining transport rollers and the part of the transport rollers adjacent to the remaining transport rollers are arranged at a first interval from each other,

the remaining transport rollers and the remaining transport rollers adjacent to the remaining transport rollers are configured to be spaced apart from each other by a second interval,

the second pitch is smaller than the first pitch.

4. The heat treatment furnace according to any one of claims 1 to 3,

the heat treatment furnace further includes a reinforcing member disposed in the heat insulating member, the reinforcing member having a mechanical strength higher than that of the heat insulating member,

the reinforcing member is positioned above the conveying roller.

5. The heat treatment furnace according to claim 4,

the reinforcing member includes: a first reinforcing member that is present at a position from an outer surface of the furnace body to an inside of the heat insulator; and a second reinforcing member which is present at a position from a surface of the heat treatment space side of the heat insulator to an inside of the heat insulator,

the first reinforcing member and the second reinforcing member are disposed apart from each other, and the first reinforcing member and the second reinforcing member have an overlapping portion when the furnace body is viewed in plan.

6. The heat treatment furnace according to claim 5,

the heat shield includes a plurality of heat insulating members stacked in a direction perpendicular to an inner surface of the furnace body,

the first reinforcing member and the second reinforcing member are disposed inside 2 or more heat insulating members among the plurality of heat insulating members.

7. The heat treatment furnace according to claim 1,

the heat insulator includes: an upper member disposed above the conveying roller; and a lower member disposed below the conveying roller,

the support member is disposed between the upper member and the lower member.

8. The heat treatment furnace according to claim 7,

the insulation is formed by a first tile,

the support member is formed of a second tile or a block made of ceramic having a mechanical strength higher than that of the first tile.

9. The heat treatment furnace according to claim 7 or 8,

the support member has an upper surface and a lower surface,

the upper surface of the support member is disposed in parallel with the lower surface of the upper member,

the lower surface of the support member is arranged in parallel with the upper surface of the lower member,

the upper and lower surfaces of the support member are horizontal.

10. The heat treatment furnace according to claim 9,

the support member further includes a support portion extending in a conveying direction and perpendicular to the upper surface and the lower surface of the support member,

the distance between the conveying rollers adjacent via the support portion is larger than the distance between the conveying rollers adjacent without via the support portion.

11. The heat treatment furnace according to claim 9 or 10,

the heat treatment furnace further includes a support plate extending in the conveyance direction and supporting 2 or more of the upper members,

the support plate is configured to contact an upper surface of the support member.

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