TWI813847B - Heat treatment furnace - Google Patents

Abstract

The present invention provides a heat treatment furnace that appropriately supports a heat insulator when a conveyor roller passes through the heat insulator arranged in the furnace. The heat treatment furnace performs heat treatment on the object to be processed. The heat treatment furnace is equipped with: a furnace body with a heat treatment space for heat treatment of the object to be processed; a heat insulating piece covering the inner surface of the furnace body; a plurality of conveying rollers arranged in the furnace body, and the ends of which pass through the heat insulating piece and the furnace body It is arranged outside the furnace; the driving device drives a plurality of conveying rollers; and the supporting member is arranged in the heat insulation part, and its mechanical strength is higher than the heat insulation part. The support member has a through hole penetrating in the axial direction of the conveyor roller. A conveying roller is arranged in the through hole.

Description

heat treatment furnace

The technology disclosed in this specification relates to a heat treatment furnace that performs heat treatment on an object to be processed.

Sometimes, a heat treatment furnace (for example, a roller kiln, etc.) is used to heat-treat the object to be processed. This heat treatment furnace is equipped with a plurality of conveyor rollers, and the object to be processed is conveyed by rotating the conveyor rollers with the object to be processed being placed on the conveyor rollers. For example, Patent Document 1 discloses an example of a heat treatment furnace.

[Prior Technical Document]

〔Patent documents〕

Patent Document 1: Japanese Patent Application Publication No. 2016-156612

In such a heat treatment furnace, a conveyor roller installed in the furnace penetrates the furnace body and protrudes outside the furnace, and is connected to a driving device for rotating the conveyor roller outside the furnace. In addition, in this heat treatment furnace, in order to maintain the temperature, and the space in the furnace is covered by thermal insulation members provided on the inner surface of the furnace body. Therefore, the conveying roller also penetrates the through-hole provided in the heat insulating member covering the space in the furnace. Therefore, for example, when the pitch at which the conveyance rollers are provided becomes narrower, the pitch between the through holes of the heat insulator through which the conveyance rollers penetrate also becomes narrower. That is, the thickness of the heat insulating material provided between two adjacent through holes of the heat insulating material (that is, the thickness of the heat insulating material in the conveyance direction) becomes small. Therefore, the remaining portion of the heat insulating material through which the conveying roller passes becomes smaller, making it difficult to support the heat insulating material located above the portion through which the conveying roller passes. This specification discloses a technique for appropriately supporting a heat insulator when a conveyor roller passes through the heat insulator arranged in the furnace.

The heat treatment furnace disclosed in this specification performs heat treatment on the object to be processed. The heat treatment furnace is equipped with: a furnace body with a heat treatment space for heat treatment of the object to be processed; a heat insulating piece covering the inner surface of the furnace body; a plurality of conveying rollers arranged in the furnace body, and the ends of which pass through the heat insulating piece and the furnace body. It is arranged outside the furnace; the driving device drives a plurality of conveying rollers; and the supporting member is arranged in the heat insulation part, and its mechanical strength is higher than the heat insulation part. The support member has a through hole penetrating in the axial direction of the conveyor roller. A conveying roller is arranged in the through hole.

In the heat treatment furnace described above, a support member having a higher mechanical strength than the heat insulator is disposed inside the heat insulator, and a transport roller is disposed in a through hole provided in the support member. Accordingly, even if the end portion of the conveying roller passes through the heat insulator and protrudes to the outside of the furnace body, the heat insulator located above the portion where the support member is arranged can be supported by the support member.

10:Heat treatment furnace

12:Object to be processed

20: Furnace body

22a: Top wall

22b: Bottom wall

22c~22f: side wall

24:Space

26:Open your mouth

28:Open your mouth

30,32: heater

52,52a~52d: Conveying roller

54,56:Conveying device

60:Thermal insulation parts

62a~62g: Heat insulation board

68a,68b: bricks and tiles

70: Support components

72: Outer support member

74:Through hole

76:Inside support structure

78:Through hole

80: Reinforcement parts

82:Outer reinforcement member

84:Inner reinforcement member

86: Support components

86a:Part 1

86b:Part 2

90: Support pin

92: Support pin

94:Support components

110: Treatment furnace

120:furnace body

124:Space

160:Thermal insulation parts

162:Heat insulation board

168: Bricks

168a: Upper side bricks

168b: Lower side bricks

170: Support components

170a: Upper surface

170b: Lower surface

170c: side

174:Through hole

176:Support board

270:Support components

270a: Upper surface

270b: Lower surface

270c: Support Department

274: First through hole

276: Second through hole

C: Gap

L: wall thickness

P1~P6: spacing

R: outer diameter

FIG. 1 shows the schematic structure of the heat treatment furnace of Embodiment 1, and is a longitudinal cross-sectional view of the heat treatment furnace taken along a plane parallel to the conveyance direction of the object to be processed.

FIG. 2 is a cross-sectional view taken along line II-II of FIG. 1 , showing a cross-section of the support member through a transverse cut.

FIG. 3 is an enlarged view of key part III of FIG. 2 .

FIG. 4 is a cross-sectional view taken along line IV-IV in FIG. 3 .

Figure 5 shows other configurations of the conveying roller and the supporting member.

Figure 6 is a cross-sectional view taken along line VI-VI in Figure 1, showing a cross-section of the reinforcing member being cut transversely.

FIG. 7 is a diagram showing another structure of the support pin.

8 shows the schematic structure of the heat treatment furnace of Example 2, and is a cross-sectional view of the heat treatment furnace taken along a plane perpendicular to the conveyance direction of the object to be processed.

FIG. 9 is an enlarged view of the key part IX in FIG. 8 .

FIG. 10 is a cross-sectional view taken along line X-X in FIG. 9 .

FIG. 11 is a cross-sectional view showing the structure of the support member of Example 3. FIG.

[Better form of implementing the invention]

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

(Feature 1) In the heat treatment furnace disclosed in this specification, the number of supporting members arranged can be smaller than the number of the plurality of conveying rollers. Some of the conveying rollers penetrate the heat insulating material through the through holes. On the other hand, the remaining conveying rollers among the plural conveying rollers may penetrate the heat insulating material without interposing the through holes. According to this configuration, the number of supporting members is less than the number of conveying rollers, so the supporting members are arranged with part of the conveying rollers removed. Therefore, by arranging the conveying roller between two adjacent support members, the distance between the conveying rollers can be narrowed. This makes it possible to both narrow the pitch of the conveyance rollers and support the heat insulating material by the support member.

(Feature 2) In the heat treatment furnace disclosed in this specification, two or more remaining conveyance rollers may be arranged between two adjacent partial conveyance rollers in at least a part of the conveyance path. In this case, the remaining conveying rollers and the conveying rollers adjacent to a portion of the remaining conveying rollers may be arranged to be spaced apart from each other by a first distance. The remaining conveying rollers and the remaining conveying rollers adjacent to the remaining conveying rollers may be configured to be spaced apart from each other by a second distance. The second spacing may be smaller than the first spacing. With such a configuration, the distance between the transfer rollers (that is, the second pitch) when the transfer rollers that penetrate the heat insulator without interposing the support member (that is, the remaining transfer rollers) are continuously arranged can be reduced. Thereby, a plurality of conveying rollers can be arranged at unequal intervals in at least a part of the conveying path, and the pitch of the conveying rollers can be locally narrowed. Therefore, both narrowing the pitch of the conveyance rollers and supporting the heat insulator by the supporting member can be achieved.

(Feature 3) The heat treatment furnace disclosed in this specification may further include a reinforcing member disposed in the heat insulating member and having a higher mechanical strength than the heat insulating member. The reinforcement may be located higher than the position of the conveyor roller. With this configuration, the reinforcing member is disposed above the position where the conveyance roller penetrates, that is, above the support member. Therefore, the heat insulating member located above the supporting member can be supported more appropriately.

(Feature 4) In the heat treatment furnace disclosed in this specification, the reinforcing member may include: a first reinforcing member located from the outer surface of the furnace body to the inside of the heat insulating member; and a second reinforcing member located from the outer surface of the furnace body to the inside of the heat insulating member. The surface of the heat insulating material on the side of the heat treatment space extends to the inside of the heat insulating material. The first reinforcing member and the second reinforcing member may be arranged separately and have portions that overlap when the furnace body is viewed from above. With such a configuration, the first reinforcing member and the second reinforcing member are separated, so that the first reinforcing member and the second reinforcing member can be prevented from forming a heat transfer path penetrating 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. In addition, the first reinforcing member and the second reinforcing member are arranged so as to have overlapping portions in plan view. Therefore, even if the two reinforcing members are arranged to be separated, the heat insulator can be fully supported.

(Feature 5) In the heat treatment furnace disclosed in this specification, the heat insulating material may be composed of 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 arranged inside some of the plurality of heat insulating members. Based on such a structure, it is possible to appropriately strengthen the heat insulating member by arranging the first reinforcing member and the second reinforcing member to span a plurality of heat insulating members.

(Feature 6) In the heat treatment furnace disclosed in this specification, the heat insulating material may include an upper member disposed above the conveyor roller, and a lower member disposed below the conveyor roller. The support member may be disposed between the upper member and the lower member. With this configuration, the support member can be installed after the lower member is installed, and then the upper member can be installed. Therefore, installation of the support member can be made easy.

(Feature 7) In the heat treatment furnace disclosed in this specification, the heat insulating member may be formed of the first tile. The support member may be formed from a second tile or ceramic block having a higher mechanical strength than the first tile. With this structure, the upper member can be appropriately supported by the second brick or ceramic block having a higher mechanical strength than the first brick.

(Feature 8) In the heat treatment furnace disclosed in this 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 level. With such a structure, the support member can be stably arranged between the upper member and the lower member of the heat insulator. In addition, "level" includes not only level in the strict sense, but also roughly horizontal surfaces.

(Feature 9) In the heat treatment furnace disclosed in this specification, the support member may further include a support portion extending in the conveyance direction and perpendicular to the upper surface and lower surface of the support member. The distance between adjacent conveyor rollers across the support portion may be greater than the distance between adjacent conveyor rollers without the support portion. Based on this structure, a plurality of conveying rollers can be arranged at unequal intervals, thereby partially narrowing the pitch of the conveying rollers. Therefore, it is possible to achieve both narrowing the pitch of the conveying rollers and supporting the heat insulating material by the supporting member.

(Feature 10) The heat treatment furnace disclosed in this specification may further include a support plate extending in the conveyance direction and supporting two or more upper members. The support plate may be configured to contact the upper surface of the support member. With this configuration, two or more upper members adjacent to each other in the conveyance direction can be supported by the support plate. For example, if the size of the upper member in the conveying direction is smaller than the distance between adjacent supporting members , it is not easy to install the upper member on the upper surface of the supporting member. By providing the support plate, two or more upper members adjacent to each other in the conveyance direction can be easily installed.

[Example]

(Example 1)

Hereinafter, the heat treatment furnace 10 of the embodiment will be described. As shown in FIG. 1 , the heat treatment furnace 10 includes a furnace body 20 and a conveying device (52, 54) for conveying the object 12. While the transport device transports the object 12 within the furnace body 20 , the heat treatment furnace 10 performs heat treatment on the object 12 . In addition, in FIG. 1 , the heat insulating material 60 (described later) arranged in the furnace body 20 is omitted for the sake of legibility of the diagram.

Examples of the object 12 to be processed include a laminate in which a ceramic dielectric (base material) and an electrode are laminated, a positive electrode material or a negative electrode material of a lithium ion battery, and the like. When heat-treating ceramic laminated bodies using the heat treatment furnace 10, they can be placed on a flat setter and transported within the furnace. In addition, when the heat treatment furnace 10 is used to heat-treat the positive electrode material or the negative electrode material of the lithium ion battery, they can be accommodated in a box-shaped sagger and transported in the furnace. In the heat treatment furnace 10 of this embodiment, a plurality of setters and saggers can be placed and transported on the transport roller 52 (described later) in a state of being aligned in the transport direction. Hereinafter, in this embodiment, the entirety of the substance to be heat-treated, the setter on which the substance is placed, and the sagger for housing the substance is referred to as "the object to be processed 12".

As shown in FIGS. 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 arranged parallel to the bottom wall 22b (that is, parallel to the XY plane). As shown in Figure 1, the side wall 22c is arranged at the entrance end of the conveying path, It is arranged perpendicularly to the conveyance direction (that is, parallel to the YZ plane). The side wall 22d is disposed at the outlet end of the conveyance path and is disposed parallel to the side wall 22c (that is, parallel to the YZ plane). As shown in FIG. 2 , the side walls 22e and 22f are arranged parallel to the conveyance direction and perpendicularly to the top wall 22a and the bottom wall 22b (that is, parallel to the XZ plane). As shown in FIG. 1 , the opening 26 is formed in the side wall 22c, and the opening 28 is formed in the side wall 22d. The object 12 to be processed is transported into the heat treatment furnace 10 from the opening 26 by the transport device, and is transported outside the heat treatment furnace 10 from the opening 28 . That is, the opening 26 serves as a carry-in port, and the opening 28 serves as a carry-out port.

A plurality of conveying rollers 52 and a plurality of heaters 30 and 32 are arranged in the space 24 . The heaters 30 are arranged at equal intervals in the conveying direction above the conveying roller 52 , and the heaters 32 are arranged at equal intervals in the conveying direction below the conveying roller 52 . By causing the heaters 30 and 32 to generate heat, the inside of the space 24 is heated. In addition, in this embodiment, the heaters 30 and 32 are respectively arranged at equal intervals in the conveyance direction, but the structure is not limited to this. For example, the heater can be arranged at a desired position according to 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 addition, although the heaters 30 and 32 are arranged in the space 24 in this embodiment, they are not limited to this configuration. As long as the space 24 can be heated, for example, a gas burner or the like may be installed in the space 24 .

As shown in FIG. 2 , in the heat treatment furnace 10 , a heat insulating material 60 is arranged so as to cover the inner surface of the furnace body 20 . The heat insulating material 60 is composed of a plurality of flat plate-shaped heat insulating plates 62 (see FIG. 3 ). The heat insulating plates 62 are arranged parallel to the inner surface of the furnace body 20 , and a plurality of the heat insulating plates 62 are stacked in a direction perpendicular to the inner surface of the furnace body 20 . Specifically, a plurality of (seven in this embodiment) heat insulating plates 62 are stacked in parallel with the side walls 22e and 22f and are arranged inside the side walls 22e and 22f (that is, the outer wall parallel to the XZ plane of the furnace body 20). surface. The heat insulating plate 62 disposed on the innermost side of the inner surface of the side wall 22e and the innermost one disposed on the inner surface of the side wall 22f. The heat insulation panels 62 on the two sides are separated and a space 24 is provided between them. Although not shown in the figure, a plurality of (seven in this embodiment) heat insulating plates 62 are stacked on the inner surfaces of the side walls 22c and 22d, similarly to the side walls 22e and 22f, and are arranged on the side walls 22c and 22d. A space 24 is provided between the innermost heat insulation panels 62 of 22d. Similarly, a plurality of (seven in this embodiment) heat insulating plates 62 are stacked and arranged parallel to the top wall 22a and the bottom wall 22b (that is, parallel to the XY plane of the furnace body 20 the inner surface of the outer wall). The innermost heat insulating plate 62 arranged on the inner surface of the top wall 22a is separated from the innermost heat insulating plate 62 arranged on the inner surface of the bottom wall 22b, and a space 24 is provided between them. Therefore, six sides of the rectangular parallelepiped-shaped space 24 are surrounded by the heat insulating materials 60 . In the following description, in the stacking direction of the plurality of heat insulating panels 62, the side of the furnace body 20 (that is, the top wall 22a, the bottom wall 22b, the side walls 22e, 22f) may be referred to as the "outside", and the space may be referred to as the "outside". The 24th side is called the "inside". In addition, in the following description, when it is necessary to distinguish the seven heat insulating plates 62, for example, the heat insulating plates 62a to 62g are described using subscript letters (see FIG. 3), and when there is no need to distinguish, they are simply described as Heat shield 62.

In addition, although in this embodiment, seven heat insulation panels 62 of the same type are stacked on each inner surface of the six walls of the furnace body 20, the type of the stacked heat insulation panels 62 is not particularly limited. Layer up different types of insulation panels. In addition, seven heat insulating panels 62 are respectively arranged on the inner surfaces of the top wall 22a, the bottom wall 22b, and the side walls 22c, 22d, 22e, and 22f. However, the number of stacked heat insulating panels 62 is not limited. The type and number of laminated heat insulation boards can be appropriately changed depending on the heat treatment conditions and the like. Inside the heat insulator 60, a support member 70, a reinforcing member 80, and a support pin 90 are arranged. The support member 70, the reinforcement 80, and the support pin 90 will be described in detail later.

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

The conveying roller 52 has a cylindrical shape, and its axis extends in a direction perpendicular to the conveying direction (that is, in the Y direction). The plurality of conveying rollers 52 all have substantially the same diameter and are arranged at regular intervals in the conveying direction. The conveying roller 52 is supported rotatably about its axis, and is rotated by the driving force transmitted from the driving device 54 . The size of the conveying roller 52 in the axial direction is larger than the size of the furnace body 20 in the horizontal direction and perpendicular to the conveying direction (ie, the Y direction). Both ends of the conveying roller 52 in the axial direction penetrate the heat insulating member 60 and the side walls 22e and 22f. protruding to the outside of the furnace body 20 . One end of the conveying roller 52 (the end on the +Y direction side in FIG. 2 ) is connected to the driving device 54 outside the furnace body 20 , and the other end (the end on the −Y direction side in FIG. 2 ) is free. end. A part of the plurality of conveying rollers 52 arranged in the furnace body 20 penetrates a support member 70 (described later) arranged in the heat insulating material 60 .

The driving device 54 is a driving device (for example, a motor) that drives the conveyance roller 52 . The drive device 54 is connected to the conveyor 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, such as a mechanism using 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 performing heat treatment on the object 12 will be described. In order to heat-process the object 12, first, the heaters 30 and 32 are operated so that the furnace atmosphere temperature of the space 24 becomes a set temperature. Next, the object 12 is placed on the conveyor roller 52 . Next, the drive device 54 is operated to transport the object 12 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 addition, as shown in FIG. 2 , in the embodiment, one to-be-processed object 12 is placed on the axial direction of the conveyance roller 52 (that is, the Y direction) and conveyed in the heat treatment furnace 10 , but the structure is not limited to this. For example, the heat treatment furnace may be configured to transport the objects 12 in a state where a plurality of the objects 12 are arranged in the axial direction of the conveyor roller 52 .

Here, the support member 70, the reinforcement 80, and the support pin 90 are demonstrated. As mentioned above, the space 24 in the furnace body 20 is surrounded by the heat insulation member 60 , and the end of the conveying roller 52 penetrates the heat insulation member 60 and the side walls 22e and 22f to protrude 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 insulating material 60 where the transport roller 52 penetrates, the thickness of the heat insulating material 60 between adjacent through holes may be small. In particular, if the pitch at which the conveyance rollers 52 are provided is narrowed, the thickness of the heat insulating material 60 provided between the through holes of the heat insulating material 60 becomes smaller. In this way, the mechanical strength of the portion where the thickness of the heat insulating material 60 is reduced decreases, making it difficult to support the heat insulating material 60 located above the portion. Therefore, in order to appropriately support the heat insulating material 60 located above the portion through which the conveyance roller 52 passes, the supporting member 70 , the reinforcing member 80 and the supporting pin 90 are arranged.

First, the support member 70 is explained. As shown in FIG. 2 , the support member 70 is arranged in the heat insulator 60 arranged parallel to the side walls 22e and 22f via the two tiles 68a and 68b. As shown in FIGS. 2 and 3 , the support member 70 includes an outer support member 72 disposed near the side walls 22e and 22f and an inner support member 76 disposed near the space 24 . The outer support member 72 has a tubular shape and has a through hole 74 inside. medial branch The holding member 76 has a tubular shape and has a through hole 78 inside. The outer support member 72 and the inner support member 76 are formed of a member with higher mechanical strength than the heat insulator 60 and fire resistance. In this embodiment, ceramic is used. In addition, the outer support member 72 and the inner support member 76 only need to be formed of a member with higher mechanical strength than the heat insulator 60 and fire resistance, and are not limited to ceramics. The tiles 68a are arranged on the upper side of the outer support member 72, and the tiles 68b are arranged on the lower side of the outer support member 72. The Y-direction size of the tiles 68a and 68b arranged above and below the outer support member 72 (that is, the axial direction of the outer support member 72) substantially matches the Y-direction size of the outer support member 72. In addition, the brick 68a is arranged on the upper side of the inner support member 76, and the brick 68b is arranged on the lower side of the inner support member 76. The size of the bricks 68 a and 68 b arranged above and below the inner support member 76 in the Y direction (that is, the axial direction of the inner support member 76 ) substantially matches the size of the inner support member 76 in the Y line direction.

The dimensions of the outer support member 72 in the axial direction (the Y direction in FIG. 3 ) and the inner support member 76 in the axial direction (the Y direction in FIG. 3 ) are each set to be smaller than the heat insulating plate of the heat insulator 60 62 in the stacking direction (i.e., Y direction). In addition, the total value of the axial direction dimensions of the outer support member 72 and the axial direction size of the inner support member 76 is set smaller than the size of the heat insulating plates 62 of the heat insulating material 60 in the stacking direction. In this embodiment, the axial dimension of the outer support member 72 substantially matches the total thickness of the two heat insulating plates 62b and 62c arranged second and third from the outer side. In addition, the dimension of the inner support member 76 in the axial direction is substantially consistent with the total value of the thickness of the two heat insulating plates 62e and 62f arranged second and third from the inner side. The diameters of the through holes 74 and 78 are substantially the same and are larger than the diameter of the conveyance roller 52 (see FIG. 4 ).

As shown in FIGS. 2 and 3 , the outer support member 72 and the inner support member 76 are arranged in series inside the heat insulator 60 arranged on the inner surfaces of the side walls 22e and 22f. Specifically, the outer support member 72 and the inner support member 76 are arranged in the stacking direction within the heat insulating plate 62 disposed on the inner surfaces of the side walls 22e and 22f. The outer support member 72 and the inner support member 76 are arranged to coincide with the axes of the outer support member 72 and the inner 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 are substantially aligned. In addition, the outer support member 72 and the inner support member 76 are arranged apart from each other in the axial direction. In this embodiment, the outer support member 72 and the inner support member 76 are separated by a distance equal to the thickness of the fourth heat insulating plate 62d from the outer side. Therefore, in this embodiment, among the seven heat insulating panels 62a to 62g, the outer supporting member 72 and the bricks 68a and 68b are arranged on the second and third heat insulating panels 62b and 62c from the outside. The second and third heat insulating panels 62e and 62f from the inner side are provided with the inner support member 76 and the bricks 68a and 68b. On the other hand, the heat insulating panels 62a, 62d and 62g are not provided with the support member 70 and the bricks. Tiles 68a, 68b. Therefore, the heat insulation panels 62b and 62c in which the outer support member 72 and the bricks 68a and 68b are arranged are sandwiched by the heat insulation panels 62a and 62d in which the support member 70 and the bricks 68a and 68b are not arranged. The inner support member 76 and The heat insulating plates 62e and 62f of the tiles 68a and 68b are sandwiched between the heat insulating plates 62d and 62g in which the supporting member 70 and the tiles 68a and 68b are not arranged. Thus, by arranging the support member 70 and the tiles 68a and 68b, it is possible to suppress the decrease in thermal insulation performance. The outer support member 72 and the inner support member 76 are arranged so that 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 conveyance roller 52 . The conveying roller 52 is arranged in the through holes 74 and 78 .

As shown in FIG. 4 , the support members 70 (ie, the outer support member 72 and the inner support member 76 ) are configured to be separated in the conveyance direction (ie, the X direction). Specifically, two support members 70 arranged adjacently A conveying roller 52 is arranged between them. The conveying roller 52 arranged between adjacent support members 70 penetrates the heat insulator 60 (specifically, the heat insulator 60 and the tiles 68 a and 68 a arranged inside the heat insulator 60 without penetrating the support members 70 ). between 68b). Therefore, among the plurality of conveying rollers 52 , some of the conveying rollers 52 are disposed in the heat insulator 60 through the through holes 74 and 78 provided in the supporting member 70 , and the remaining conveying rollers 52 are disposed in the heat insulating member 60 without interposing the supporting member 70 . Inside the heat insulator 60. In this embodiment, the conveying rollers 52 that penetrate the heat insulating material 60 with the supporting member 70 interposed therebetween and the conveying rollers 52 that penetrate the heat insulating material 60 without interposing the supporting member 70 are alternately arranged. In addition, the heat insulating boards 62b, 62c, 62e, and 62f on which the supporting member 70 is arranged are divided up and down at the height at which the supporting member 70 is arranged, and bricks 68a and 68b are arranged between them. A space is provided between the tiles 68a and 68b. The supporting member 70 (and the conveying roller 52 arranged at the through hole (74, 78) thereof) is arranged in this space and is arranged between the adjacent supporting members 70. The conveying rollers 52 between them are directly arranged. The tiles 68a and 68b are provided with recessed portions 64 at positions where the support members 70 are arranged. The recess 64 extends in the axial direction of the support member 70 and is formed in a shape that follows the outer surface of the support member 70 . The support member 70 is positioned by the recess 64 . In addition, in this embodiment, the heat insulating plates 62b, 62c, 62e, and 62f on which the supporting member 70 is arranged are divided up and down at the height at which the supporting member 70 is arranged, and the bricks 68a and 68b are arranged therebetween. However, this is not limited to So constituted. For example, the heat insulating plates 62b, 62c, 62e, and 62f may be formed with a through hole through which the support member 70 passes and a through hole through which the conveyance roller 52 passes without interposing the support member 70.

For example, when the support member 70 is not arranged, all the conveyance rollers 52 are arranged in the through holes provided in the heat insulator 60 without interposing the support member 70 . Since all the conveying rollers 52 are arranged at the same height, the heat insulating material 60 exists only between adjacent conveying rollers 52 at the height at which the conveying rollers 52 are arranged. Therefore, the size of the heat insulating material 60 in the conveying direction (X direction) at the height where the conveying roller 52 is arranged becomes small, and the heat insulating material 60 located above the position where the conveying roller 52 is arranged may not be supported. Especially if the conveyor is narrowed the distance between the rollers 52, the problem will become apparent. In this embodiment, the support member 70 is arranged inside the heat insulator 60 , and the conveying roller 52 is arranged inside the through holes 74 and 78 of the support member 70 . By arranging the support member 70 in this way, even if the end of the conveyor roller 52 penetrates the heat insulator 60 and protrudes outside the furnace body 20 , the support member 70 can support the partition located above the portion where the support member 70 is arranged. Hotware 60.

In addition, in this embodiment, the outer support member 72 and the inner support member 76 are arranged apart from each other in the axial direction. For example, when the support member is disposed so as to penetrate the entire stacked heat insulating panels 62a to 62g, the heat in the space 24 is transferred from the inside to the outside via the support member and easily escapes to the outside of the furnace body 20. In this embodiment, by arranging the outer support member 72 and the inner support member 76 to be separated in the axial direction, the heat transferred to the inner support member 76 is disposed between the outer support member 72 and the inner support member 76 . The heat is insulated by the heat insulating plates 62d between them and is not easily transferred to the outer support member 72. Therefore, the heat in the space 24 can be inhibited from escaping to the outside of the furnace body 20 .

In addition, in this embodiment, not all of the conveyance rollers 52 are penetrated through the support member 70 , but only some of the conveyance rollers 52 (in this embodiment, about half of the conveyance rollers 52 ) are penetrated through the support member 70 . This can prevent the distance between the conveyance rollers 52 from becoming wider. That is, the heat insulator 60 can be supported by the support member 70, and the distance between the conveyance rollers 52 can be prevented from being widened.

In addition, in this embodiment, the conveying roller 52 (hereinafter also referred to as conveying roller 52a) that penetrates the heat insulating material 60 with the supporting member 70 interposed therebetween is distinguished from the conveying roller 52 that penetrates the heat insulating material 60 with the supporting member 70 interposed therebetween. 52 (hereinafter also referred to as conveyor rollers 52b) are alternately arranged, but the structure is not limited to this. For example, as shown in FIG. 5 , two or more conveying rollers 52 b may be arranged between adjacent support members 70 . In addition, in this case, the conveyor roller 52a and 52b can be arranged at unequal intervals in the conveying direction. Specifically, the pitch P1 between the conveyance roller 52a and the conveyance roller 52b is widened by the support member 70 arrange|positioned around the conveyance roller 52a. On the other hand, since the supporting member 70 is not located between the two conveying rollers 52b, the pitch P2 between the two conveying rollers 52b can be set narrower. In this way, by setting the pitch P1 and the pitch P2 to different lengths, the conveying rollers 52 can be arranged at unequal intervals along the entire conveying path, and the pitch of the conveying rollers 52 can be locally narrowed. For example, when the mass of the object 12 to be processed is large, the diameter of the conveying roller 52 needs to be increased to improve the mechanical strength. On the other hand, the interval between the conveying rollers 52 needs to be narrowed so that a plurality of conveying rollers 52 can support the object to be processed. Disposal 12. By narrowing the distance between the conveyance rollers 52b, even when the support member 70 is arranged, the distance between the conveyance rollers 52 can be partially narrowed, and the object 12 to be processed with a large mass can be conveyed.

In addition, although the outer support member 72 and the inner support member 76 are tubular in this embodiment, they are not limited to such a structure. The outer support member 72 and the inner support member 76 only need to be configured to have through holes 74 and 78 for the ends of the conveyance roller 52 to pass through and to support the heat insulator 60. The outer shapes of the outer support member 72 and the inner support member 76 do not matter. Specially limited.

Next, the reinforcement 80 will be described. As shown in FIG. 6 , the reinforcing member 80 is disposed in the heat insulating member 60 that is parallel to and adjacent to the side walls 22e and 22f. The reinforcing member 80 is arranged at a height higher than the position where the conveyance roller 52 penetrates in the heat insulating member 60 . The reinforcement 80 includes an outer reinforcing member 82 disposed near the side walls 22e and 22f and an inner reinforcing member 84 disposed near the space 24 . The outer reinforcing member 82 and the inner reinforcing member 84 are arranged apart from each other in the height direction.

The outer reinforcing member 82 has a pin shape and is inserted obliquely upward from the outer side of the furnace body 20 . The outer reinforcing member 82 is parallel to a cross section perpendicular to the conveyance direction, and has an inner end located above the outer end. The angle formed by the axis of the outer reinforcing member 82 and the axis of the conveyor roller 52 is 0 degrees or more and 40 degrees or less. In addition, the outer reinforcing member 82 penetrates some of the plurality of heat insulating panels 62 but does not reach the space 24 . Therefore, the outer reinforcing member 82 is disposed across the plurality of heat insulating panels 62 arranged on the outer side, and does not penetrate the plurality of heat insulating panels 62 arranged on the inner side. In this embodiment, the outer reinforcing member 82 is disposed in the five heat insulating plates 62a to 62e disposed on the outer side, and is not disposed in the two heat insulating plates 62f and 62g disposed on the inner side. The heat insulating panels 62a to 62e are integrated by the outer reinforcing member 82 . In addition, based on the friction force acting between the outer reinforcing member 82 and the heat insulating plates 62a to 62e, the outer reinforcing member 82 is prevented from being pulled out from the heat insulating plates 62a to 62e, and these are integrated. In this embodiment, the outer reinforcing member 82 is inserted obliquely, thereby increasing the contact area between the outer reinforcing member 82 and the heat insulation panels 62a to 62e, thereby improving the fastening force thereof. In addition, although in this embodiment, the outer reinforcing member 82 is disposed only on the heat insulator 60 adjacent to the side walls 22e and 22f, the outer reinforcing member 82 may also be disposed on the heat insulator 60, the side wall 22e, or the side wall 22f. In this case, the heat insulating material 60 and the side wall 22e or the side wall 22f can be integrated with the outer reinforcing member 82, and the same effect as when the outer reinforcing member 82 is arranged only on the heat insulating material 60 can be achieved.

The inner reinforcing member 84 has a pin shape and is inserted into the heat insulating material 60 from the space 24 side toward diagonally downward. The inner reinforcing member 84 is arranged in parallel with the outer reinforcing member 82 . Specifically, the inner reinforcing member 84 is disposed below the outer reinforcing member 82 and separated from the outer reinforcing member 82 . In addition, the inner reinforcing member 84 penetrates some of the plurality of heat insulating panels 62 but does not reach the side wall 22e or the side wall 22f. Therefore, the inner reinforcing member 84 is disposed across some of the heat insulating panels 62 disposed on the inner side among the plurality of heat insulating panels 62 . However, the inner reinforcing member 84 is not A plurality of heat insulation panels 62 arranged on the outside are penetrated. In this embodiment, the inner reinforcing member 84 is disposed in the five heat insulating panels 62c to 62g disposed on the inner side, and is not disposed in the two heat insulating panels 62a and 62b disposed on the outer side. The inner reinforcing member 84 is fixed in the heat insulation panels 62c to 62g by its frictional force, and these heat insulation panels 62c to 62g are integrated. The outer reinforcing member 82 and the inner reinforcing member 84 are arranged so as to partially overlap when viewed from a direction (that is, the Z direction) perpendicular to both the conveyance direction and the axial direction of the conveyance roller 52 . In this embodiment, the outer reinforcing member 82 and the inner reinforcing member 84 are disposed so as to overlap the heat insulating plates 62c to 62e when viewed in the Z direction. The seven heat insulating panels 62a to 62g are integrated by the outer reinforcing member 82 and the inner reinforcing member 84.

In addition, a metal support member 86 is arranged on the outermost heat insulating plate 62a and the side wall 22e or the side wall 22f. The support member 86 is L-shaped and includes a first portion 86a extending in the axial direction of the conveyor roller 52 (ie, the Y direction) and a second portion 86b extending parallel to the side walls 22e and 22f (ie, the Z direction). The first part 86a is fixed to the upper surface of the through-hole provided in the heat insulation panel 62a and the side walls 22e, 22f for the conveyance roller 52 to pass through. The size of the first portion 86a in the Y direction is substantially consistent with the total value of the size of the heat shield 62a in the Y direction and the size of the side wall 22e or the side wall 22f in the Y direction. The second part 86b is perpendicular to the first part 86a and is fixed to the outer surfaces of the side walls 22e and 22f. The lower end of the second part 86b is connected to the outer end of the first part 86a. By arranging the support member 86, the outermost heat insulating panel 62a is supported by the side wall 22e or the side wall 22f. As mentioned above, the plurality of heat insulating panels 62a to 62g are integrated by the reinforcing member 80. Therefore, by supporting the outermost heat insulating panel 62a to the side wall 22e or the side wall 22f, the plurality of heat insulating panels 62a to 62g can be integrated. All are supported by side wall 22e or side wall 22f.

In this embodiment, the reinforcing member 80 is arranged at a height higher than the position where the conveyance roller 52 penetrates in the side walls 22e and 22f. In addition, the outer reinforcing member 82 and the inner reinforcing member 84 are respectively disposed across some of the plurality of heat insulating panels 62 arranged on the inner surfaces of the side walls 22e and 22f. Accordingly, the stacked heat insulating panels 62 can be supported integrally and separation in the stacking direction can be suppressed. Furthermore, the outermost heat insulating plate 62a is fixed to the side walls 22e, 22f via the support member 86. Thereby, a plurality of heat insulating panels 62 integrated by the reinforcing member 80 can be supported. Therefore, the heat insulator 60 located above the conveyance roller 52 can be appropriately supported.

In addition, in this embodiment, two separate members, the outer reinforcing member 82 and the inner reinforcing member 84, are used as the reinforcing member 80, and the outer reinforcing member 82 and the inner reinforcing member 84 are arranged separately. For example, when the heat insulation panel 62 is integrated with a reinforcing member, the reinforcing member needs to pass through the space 24 from the outside of the furnace body 20, and the heat in the space 24 is transferred from the inside to the outside through the reinforcing member. It is easy to escape outside the furnace body 20 . The reinforcing member 80 of this embodiment is composed of an outer reinforcing member 82 and an inner reinforcing member 84. Each of the outer reinforcing member 82 and the inner reinforcing member 84 does not penetrate into the space 24 from the outside of the furnace body 20. Therefore, the heat in the space 24 can be inhibited from escaping to the outside of the furnace body 20 . In addition, the outer reinforcing member 82 and the inner reinforcing member 84 are disposed so as to overlap at a plurality of heat insulating plates 62 (three heat insulating plates 62c to 62e in this embodiment) when viewed in the Z direction. Thereby, the heat insulating plate 62 arranged inside and the heat insulating plate 62 arranged outside are integrated by the overlapping portion of the outer reinforcing member 82 and the inner reinforcing member 84, so that the heat insulating material 60 can be appropriately supported. Therefore, even if the reinforcing member 80 is formed of two members and the two members are arranged apart, the heat insulating member 60 can be fully supported.

In addition, in this embodiment, the outer reinforcing member 82 and the inner reinforcing member 84 are disposed so that the angle formed by their axis and the axis of the conveying roller 52 is 0 degrees or more and 40 degrees or less. By setting the angle formed by the axes of the outer reinforcing member 82 and the inner reinforcing member 84 and the axis of the conveyor roller 52 to 0 degrees or more, it is possible to suppress the inclination of the heat insulating plate 62 arranged parallel to the side walls 22e and 22f toward the space 24 side. . In addition, 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, it is possible to avoid the outer reinforcing member 82 and the inner reinforcing member 84 from being located in the partition arranged inside. The outer reinforcing member 82 and the inner reinforcing member 84 can be arranged at appropriate positions in the heat insulating plate 62 above the inside of the heat plate 62 .

Next, the support pin 90 will be described. As shown in FIGS. 2 and 6 , the support pin 90 is arranged in the heat insulator 60 arranged parallel to and adjacent to the top wall 22 a. The support pins 90 are arranged in the plurality of heat insulating plates 62 arranged adjacent to the top wall 22a along the stacking direction. The support pin 90 penetrates the top wall 22a and all the heat insulating plates 62 arranged in a stack, and is fixed to these heat insulating plates 62. Therefore, the support pin 90 is located at a position extending from the top wall 22 a through the plurality of heat insulating panels 62 to the space 24 . 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 the end of the support pin 90, and a bolt is screwed into the screw groove to fix the upper end of the support pin 90 to the top wall 22a. The end of the support pin 90 on the space 24 side is fixed to the heat insulating 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 that of the upper end of the support pin 90 . A plurality of support pins 90 are arranged in the axial direction of the conveyor roller 52 (three in this embodiment), and a plurality of support pins 90 are arranged across the entire heat treatment furnace 10 in the conveyance direction. The support pins 90 can support the heat insulator 60 arranged parallel to and adjacent to the top wall 22a, that is, the heat insulator 60 arranged above the space 24 can be supported.

In addition, although the support pin 90 of this embodiment is located at a position extending from the top wall 22 a through the plurality of heat insulation panels 62 to the space 24 , it is not limited to this configuration. It suffices as long as it can support the heat insulator 60 arranged adjacent to the top wall 22a. 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 arranged adjacent to the top wall 22 a is composed of six heat insulating plates 62 a to 62 f, and the thickness of the innermost heat insulating plate 62 f is set to be larger than that of the other heat insulating plates. Thickness of 62a~62e. The support pins 92 are arranged in the plurality of heat insulating plates 62a to 62f arranged adjacent to the top wall 22a along the stacking direction (that is, the up-down direction). Specifically, the support pin 92 is located at a position extending from the top 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 side. 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 portion of the support pin 90 on the space 24 side is fixed to the support member 94 inside the heat insulating plate 62f arranged on the innermost side. A plurality of support pins 92 are arranged in the axial direction of the conveyance roller 52 , and a plurality of support pins 92 are arranged across the entire heat treatment furnace 10 in the conveyance direction (that is, the X direction). The support member 94 is disposed inside the innermost heat insulating plate 62f among the heat insulating materials 60 disposed adjacent to the ceiling wall 22a, and is integrated with the heat insulating plate 62f. The support member 94 extends in the conveying direction (ie, the X direction) below the support pin 92 . The lower ends of the plurality of support pins 92 are fixed to the support member 94 . The heat insulator 60 arranged parallel to and adjacent to the top wall 22 a can be supported by the support pin 92 and the support member 94 , that is, the heat insulator 60 arranged above the space 24 can be supported.

(Example 2)

In the above-mentioned Embodiment 1, the heat insulating member 60 is composed of the heat insulating plate 62, but it is not limited to this structure. For example, as shown in FIG. 8 , the insulation member 160 may be composed of an insulation panel 162 and a brick 168 . In addition, in this embodiment, the structures of the heat insulator 160 and the supporting member 170 are different from those of the heat insulating member 60 and the supporting member 70 of Embodiment 1. Same, and other components are roughly the same. Therefore, description of the same configuration as that of the heat treatment furnace 10 of Example 1 will be omitted.

As shown in FIG. 8 , in the heat treatment furnace 110 of this embodiment, a heat insulator 160 is arranged to cover the inner surface of the furnace body 120 . The heat insulating member 160 is composed of a plurality of flat heat insulating boards 162 and bricks 168 . A plurality of heat insulating plates 162 are stacked, and the outermost heat insulating plate 162 is disposed in contact with the furnace body 120 (that is, the top wall 22a, the bottom wall 22b, and the side walls 22c to 22f). Bricks 168 are arranged inside a plurality of heat insulation panels 162 . Specifically, the bricks 168 are stacked so as to cover the inner side of the innermost heat insulating panel 162 . Hereinafter, a plurality of tiles (but excluding the supporting member 170 described below) arranged inside a plurality of heat insulating plates 162 are collectively referred to as "tiles 168".

The tiles 168 covering the heat insulating plate 162 arranged parallel to the side wall 22e and the tiles 168 covering the heat insulating plate 162 arranged parallel to the side wall 22f are separated, and a space 124 is provided between them. Although not shown in the figure, a plurality of heat insulation panels 162 and bricks 168 are arranged on the inner surfaces of the side walls 22c and 22d, similarly to the side walls 22e and 22f, and the heat insulation panels 162 are arranged parallel to the side walls 22c and 22d. Spaces 124 are provided between the covered tiles 168 . Similarly, a plurality of heat insulation boards 162 and bricks 168 are arranged on the inner surfaces of the top wall 22a and the bottom wall 22b (that is, the outer walls parallel to the XY plane of the furnace body 20). Specifically, the tiles 168 arranged on the inner surface of the ceiling wall 22a are arranged to be curved so that their central portions protrude upward (that is, in the +Z direction). Thereby, the tiles 168 arranged above are supported by the adjacent tiles 168 . The heat insulation board 162 arranged between the ceiling wall 22a and the tiles 168 follows the shape of the upper surface of the adjacent tiles 168, and the central portion (ie, the central portion in the Y direction) protrudes upward. The tiles 168 covering the heat insulating plate 162 arranged near the top wall 22a, and the tiles 168 covering the heat insulating plate 162 arranged parallel to the bottom wall 22b. separated, with space 124 provided between the two. Therefore, six sides of the substantially rectangular parallelepiped-shaped space 124 are surrounded by bricks 168 . In addition, the plurality of heat insulating plates 162 arranged near the top wall 22a may be supported by support pins in the same manner as in Embodiment 1.

The end of the conveying roller 52 penetrates the heat insulating member 160 (ie, the heat insulating plate 162 and the brick 168) and the side walls 22e, 22f to protrude out of the furnace body 120. Therefore, the heat insulating member 160 (that is, the heat insulating plate 162 and the brick 168) is provided with a through hole for the conveyance roller 52 to pass through. In order to properly support the tile 168 located in the upper portion of the through hole, a support member 170 is provided within the tile 168 . In addition, although illustration is omitted in FIG. 8 , a reinforcing member 80 is arranged on the heat insulating plate 162 in order to support the heat insulating plate 162 located above the through hole. In addition, the tubular support member 70 of Embodiment 1 may be disposed inside the heat insulating plate 162 .

The support member 170 will be described. The support member 170 is arranged in the tile 168 which covers the heat insulation board 162 arranged parallel to the side walls 22e and 22f. Hereinafter, the tiles 168 located above the support member 170 may be referred to as upper tiles 168a, and the tiles 168 located below the support member 170 may be referred to as lower tiles 168b (see FIGS. 9 and 10 ). Therefore, the support member 170 is disposed between the upper tile 168a and the lower tile 168b. The support member 170 is formed from a material with higher mechanical strength than the mechanical strength of the tiles 168 . Specifically, the mechanical strength shows the strength against compression (compressive strength). The type of support member 170 is not particularly limited. For example, the support member 170 may be a brick formed of a material with higher mechanical strength than the brick 168, or a ceramic block. In addition, the support member 170 may be formed of the same material as the tiles 168, and may be a tile with a lower porosity (ie, higher air tightness) than the tiles 168 (for example, Hi alumina bubble tiles with a porosity of 57%, etc. refractory and insulating bricks). Additionally, the support member 170 may be formed from a material with higher mechanical strength than the tiles 168 and may be a tile with a lower porosity than the tiles 168 . In addition, the type of support member 170 It 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 conveyor roller 52, the pitch between the conveyor rollers 52, and the like.

As shown in FIGS. 9 and 10 , the support member 170 has a substantially rectangular parallelepiped shape and has a through hole 174 . The size of the support member 170 in the axial direction (that is, the Y direction) substantially coincides with the size of the tile 168 in the Y direction, and the support member 170 is arranged so that the position in the Y direction coincides with the tile 168 . The support member 170 has a substantially square shape when viewed in the axial direction (ie, the Y direction), and the through hole 174 also has a substantially square shape when viewed in the axial direction (ie, the Y direction). In other words, the support member 170 is composed of an upper surface 170a, a lower surface 170b, and two side surfaces 170c, and the through hole 174 is a space surrounded by the upper surface 170a, a lower surface 170b, and the two side surfaces 170c. The upper surface 170a and the lower surface 170b are substantially horizontal and are arranged substantially parallel to the lower surface of the upper tile 168a and the upper surface of the lower tile 168b. The two side surfaces 170c are perpendicular to the upper surface 170a and the lower surface 170b (as well as the lower surface of the upper tile 168a and the upper surface of the lower tile 168b). The upper surface 170a, the lower surface 170b and the two side surfaces 170c have approximately the same thickness. In addition, in the support member 170, the outer surface corners and the inner surface corners 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 arranged in the through hole 174 of the supporting member 170 .

In addition, the supporting members 170 are arranged separately in the conveyance direction (that is, the X direction). The conveying roller 52 is also arranged between the two adjacent support members 170 . The conveying roller 52 arranged between the adjacent supporting members 170 is not arranged in the through hole 174 of the supporting member 170 but is arranged between the upper tile 168a and the lower tile 168b. Therefore, among the plurality of conveying rollers 52 , some of the conveying rollers 52 are arranged to penetrate the through holes 174 provided in the supporting member 170 , and the remaining conveying rollers 52 are arranged not to interpose the supporting member 170 .

In this embodiment, two conveying rollers 52 are arranged between two adjacent support members 170 . The distance P3 between the conveyor roller 52 (conveyor roller 52a) arranged in the support member 170 and the conveyor roller 52 (conveyor roller 52b) arranged not across the support member 170 is larger than the distance P3 between the adjacent support members 170. The distance P4 between the two conveying rollers 52b. That is, the plurality of conveying rollers 52 are arranged at unequal intervals in the conveying direction. By narrowing the pitch P4 between the conveyance rollers 52b, the number of conveyance rollers 52 supporting the object to be processed 12 can be increased, and the object to be processed 12 with a large mass can be conveyed.

In addition, the size of the distances P3 and P4 is set so that one to-be-processed object 12 can always be supported by four or more conveyance rollers 52 . By supporting the object 12 with four or more conveying rollers 52, even if one conveying roller 52 is broken, more than half of the bottom surface of the object 12 can be supported with three or more conveying rollers 52. , can prevent the processed object 12 from falling from the conveying surface. For example, in this embodiment, the size of the object 12 in the conveying direction is 315 mm, the pitch P3 is 82 mm, and the pitch P4 is 65 mm. By increasing the pitch P3 between the conveying rollers 52a and 52b arranged across the side surface 170c of the supporting member 170 and narrowing the pitch P4 between the conveying rollers 52b arranged not across the supporting member 170, support can be ensured. The object 12 is supported by four conveyance rollers 52 based on the gap between the side surface 170c of the member 170 and the conveyance rollers 52a and 52b. Specifically, when the outer diameter R of the conveyance rollers 52a and 52b is 55 mm and the wall thickness L of the support member 170 (that is, the thickness between the support member 170 and the through hole 174) is 15 mm, the conveyance rollers 52a, 52b, The gap C between 52b and the side surface 170c of the support member 170 is ensured to be 6 mm. That is, as shown in Figure 10, since P3=1/2R+C+L+C+1/2R, the calculation is C=[P3-(R+L)]/2=[82-(55+15) 〕÷2=6mm. On the other hand, when the conveying rollers 52a and the conveying rollers b are alternately arranged, and a plurality of conveying rollers 52a, 52b are arranged at equal intervals with a pitch P3, if the pitch P3 is set to If 82 mm, the object 12 to be processed of 315 mm cannot always be supported by four or more conveying rollers 52a and 52b, so the interval P3 needs to be set narrower than 82 mm. Specifically, the maximum distance P3 between the conveyance rollers 52a and 52b is 78.5 mm, and the ensured gap C between the conveyance rollers 52a and 52b and the side surface 170c of the support member 170 is 4.25 mm. That is, the calculation is C=[P3-(R+L)]/2=[78.5-(55+15)]÷2=4.25mm. In the heat treatment furnace 110, due to repeated temperature increase and decrease in the furnace body 120, the arrangement position of the heat insulator 160 in the furnace may deviate. In addition, the conveyance roller 52 may be warped. In this embodiment, since the gap between the conveying roller 52 and the supporting member 170 is ensured, the conveying roller 52 can be prevented from interfering with the supporting member 170 when the object 12 is conveyed, and the conveying roller 52 can be stably rotated. . In addition, by ensuring the gap between the conveying roller 52 and the supporting member 170, the diameter of the conveying roller 52 can be increased to convey a larger mass of the processed object 12, or the wall thickness of the supporting member 170 can be increased to facilitate lifting. To support the strength of the upper brick tile 168a.

In addition, a support plate 176 is arranged on the support member 170 . That is, the support plate 176 is configured to be in contact with the upper surface 170 a of the support member 170 . The support plate 176 extends in the conveyance direction (that is, the X direction) and is disposed in contact with the upper surfaces 170 a of two or more support members 170 that are adjacent to each other in the conveyance direction. The support plate 176 is formed of a material excellent in bending resistance, and is a ceramic plate in this embodiment. The upper side tile 168a is arranged on the support plate 176. Therefore, the upper tile 168a is arranged on the support member 170 with the support plate 176 interposed therebetween. Since the support member 170 is separated in the conveyance direction, it is difficult to arrange the upper tile 168a directly on the upper surface 170a of the support member 170. That is, if the upper tile 168a is to be disposed directly on the upper surface 170a of the support member 170, the size of the upper tile 168a must be set according to the interval at which the support member 170 is disposed. By arranging the support plate 176, the degree of freedom in the size of the upper tile 168a can be increased, and the upper tile 168a can be easily arranged on the support member 170.

In this embodiment, the support member 170 is formed from a member with higher mechanical strength than the tiles 168 . Therefore, similarly in this embodiment, even if the end of the conveying roller 52 passes through the heat insulating member 160 (ie, the heat insulating plate 162 and the brick 168) and protrudes out of the furnace body 120, it can be removed by the supporting member 170. The upper tile 168a located above the support member 170 is supported.

In addition, in this embodiment, two conveyance rollers 52 are arranged between two adjacent support members 170, but the structure is not limited to this. If the upper tile 168a can be supported by the supporting members 170, three or more conveying rollers 52 may be arranged between two adjacent supporting members 170.

(Example 3)

In the above-mentioned Embodiment 2, the support member 170 is arranged separately in the conveyance direction, but the structure is not limited to this. For example, as shown in FIG. 11 , the support members 270 may be continuously arranged in the conveyance direction. In addition, in this embodiment, the structure of the support member 270 is different from the support member 170 of Embodiment 2, and other structures are substantially the same. Therefore, the description of the same structure as that of the heat treatment furnace 110 of Example 2 will be omitted.

As shown in FIG. 11, the support member 270 is arrange|positioned between the upper side tile 168a and the lower side tile 168b. The support member 270 is formed from bricks having a higher mechanical strength than the bricks 168 . In addition, as the tiles used for the support member 270 of this embodiment, the same tiles as the support member 170 of the above-mentioned Embodiment 2 can be used, and therefore a detailed description is omitted. The support members 270 are continuously provided in the conveyance direction (ie, X direction). The supporting member 270 is composed of a plurality of refractory bricks arranged in the conveying direction. Hereinafter, the plurality of refractory bricks arranged in the conveyance direction are collectively referred to as the "support member 270".

The support member 270 has first through holes 274 and second through holes 276 having different sizes. The first through hole 274 has a substantially square shape when viewed along the axis of the conveyor roller 52 and is set to be larger than the diameter of the conveyor roller 52 . One conveying roller 52 is arranged in the first through hole 274 . The second through hole 276 has a substantially rectangular shape when viewed along the axis of the conveyance roller 52 , and is set such that the size in the conveyance direction (ie, the size in the X direction) is larger than the size in the height direction (ie, the size in the Z direction). Specifically, the size of the second through hole 276 in the conveyance direction is set to be larger than twice the diameter of the conveyor roller 52 , and the size in the height direction is set to be greater than the diameter of the conveyor roller 52 . In the second through hole 276, two conveying rollers 52 are arranged in the conveying direction. The support member 270 is composed of an upper surface 270a, a lower surface 270b, and a support portion 270c arranged 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 processed into an r shape.

The distance P5 between the conveyor roller 52 (hereinafter also referred to as conveyor roller 52c) arranged in the first through hole 274 and the conveyor roller 52 (hereinafter also referred to as conveyor roller 52d) arranged in the second through hole 276 is, The pitch P6 between the conveyance rollers 52d arranged in the same second through hole 276 is wide. That is, the plurality of conveying rollers 52 are arranged at unequal intervals in the conveying direction. By narrowing the distance between the conveying rollers 52d, the gap between the conveying rollers 52 and the supporting portion 270c of the supporting member 270 can be ensured without reducing the number of conveying rollers 52 supporting one object 12. , suppress the interference of the transport roller 52 on the support member 170, or increase the diameter of the transport roller 52 to transport the processed object 12 with a larger mass.

Also in this embodiment, the support member 270 is formed from a member having higher mechanical strength than the tiles 168 . Therefore, even if the end of the conveying roller 52 penetrates the heat insulating member 60 (ie, the heat insulating plate 162 and the brick 168) and protrudes outside the furnace, it can be supported by the supporting member 270 and positioned above the supporting member 270 The position of the upper side brick tile 168a.

In addition, in this embodiment, the second through hole 276 is configured such that the two conveying rollers 52 are disposed inside the second through hole 276, but the second through hole 276 is not limited to this structure. If the upper tile 168a can be supported by the support member 270, the second through hole may be configured to have three or more conveying rollers 52 disposed inside the second through hole.

Points to note regarding the heat treatment furnace 110 described in the embodiment will be described. The upper tile 168a of the embodiment is an example of the "upper member", the lower tile 168b is an example of the "lower member", and the side surface 170c is an example of the "support part".

As mentioned above, specific examples of the technology disclosed in this specification have been described in detail. However, these are merely illustrations and do not limit the scope of the patent application. The technology described in the scope of the patent application includes various modifications and changes to the specific examples illustrated above. In addition, the technical elements described in this specification or the drawings are technically useful 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 this specification or the drawings simultaneously achieves plural purposes, and achieving one of the purposes itself has technical usefulness.

12:Object to be processed

20: Furnace body

22a: Top wall

22b: Bottom wall

22e,22f: side wall

24:Space

52:Conveyor roller

54:Conveying device

60:Thermal insulation parts

68a,68b: bricks and tiles

70: Support components

90: Reinforcement parts

Claims (7)

A heat treatment furnace for heat treatment of objects to be treated, including: a furnace body having a heat treatment space for heat treatment of the object to be treated; a heat insulating piece covering the inner surface of the furnace body; and a plurality of conveying rollers arranged in the furnace body , and its end penetrates the heat insulation piece and the furnace body and is arranged outside the furnace body; a driving device drives the plurality of conveying rollers; a support member is arranged in the heat insulation piece, and has a mechanical strength higher than the A heat insulator; and a reinforcing member, which is disposed in the heat insulator and has a higher mechanical strength than the heat insulator; the support member has a through hole penetrating along the axial direction of the conveyor roller, and the conveyor roller is arranged in the through hole , and the reinforcing member is located at a position higher than the position of the conveying roller. The reinforcing member includes: a first reinforcing member located from the outer surface of the furnace body to the inside of the heat insulation member; and a third reinforcing member. Two reinforcing members are located from the surface of the heat insulating member on the heat treatment space side to the inside of the heat insulating member; and the first reinforcing member and the second reinforcing member are respectively arranged to be separated from each other, and have The overlapping portions when the furnace body is viewed from above; the distance between the adjacent conveyor rollers across the support member and the spacing between the adjacent conveyor rollers without the support member are set so that Four or more conveying rollers always support one object to be processed. The heat treatment furnace of Claim 1, wherein the number of the supporting members is less than the number of the plurality of conveying rollers, and some of the conveying rollers of the plurality of conveying rollers penetrate the heat insulating member via the through-hole, and The remaining conveying rollers among the plurality of conveying rollers do not penetrate the heat insulating material via the through holes. The heat treatment furnace of claim 1, wherein the heat insulating member is composed of a plurality of heat insulating members stacked in a direction perpendicular to the inner surface of the furnace body, and the first reinforcing member and the second reinforcing member are arranged Inside several thermal insulation components among the plurality of thermal insulation components. The heat treatment furnace of claim 1, wherein the heat insulating member includes: an upper member disposed above the conveyor roller; and a lower member disposed below the conveyor roller; and the support member is disposed between the upper member and the conveyor roller. between lower members. The heat treatment furnace of claim 4, wherein the heat insulating member is formed of a first brick, and the supporting member is formed of a second brick or a ceramic block with higher mechanical strength than the first brick. The heat treatment furnace of claim 4 or 5, wherein the upper surface of the support member is arranged parallel to the lower surface of the upper member, The lower surface of the support member is arranged parallel to the upper surface of the lower member, and the upper surface and the lower surface of the support member are horizontal. The heat treatment furnace of claim 6, further comprising: a support plate extending toward the conveying direction and supporting two or more upper members; the support plate is configured to contact the upper surface of the support member.

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