WO2018003781A1

WO2018003781A1 - Internal structure for furnace

Info

Publication number: WO2018003781A1
Application number: PCT/JP2017/023529
Authority: WO
Inventors: 真誠駒井; 佐藤　公美; 尚子石塚
Original assignee: 株式会社Ihi
Priority date: 2016-06-27
Filing date: 2017-06-27
Publication date: 2018-01-04
Also published as: JP6631711B2; JPWO2018003781A1

Abstract

A plate member 50 is provided inside a furnace body. The plate member forms an inner wall surface for an internal space in the furnace where an object to be baked is disposed. On the plate member, a raised portion 100 is formed rising from the front surface and/or the back surface and surrounding a portion of the front surface or the back surface.

Description

Furnace structure

This disclosure relates to a furnace structure in which a furnace space is formed.

Conventionally, as shown in, for example, Patent Document 1, a furnace including a furnace body that heats an object to be baked such as an industrial material or food is known. In such a furnace, a metal plate member is provided inside the furnace body. A heat insulating material is provided between the plate member and the outer wall of the furnace body.

JP 2001-161278 A

The plate member provided inside the furnace body is exposed to a high temperature atmosphere. Therefore, it is assumed that the plate member is deformed under the influence of heat. When the plate member is deformed, the stress is partially concentrated, and there is a possibility that a crack or a crack occurs. Therefore, it is conceivable to use a thick plate having a certain thickness as the plate member. However, when the plate thickness of the plate member is increased, the manufacturing cost increases. In addition, there is a concern that the running cost will increase and the productivity will decrease, such as a longer warm-up time.

This disclosure is intended to provide an in-furnace structure capable of reducing costs and improving productivity.

In order to solve the above problems, the in-furnace structure of the present disclosure has a plate member that constitutes the inner wall surface of the furnace space, and is raised from one or both of the front surface and the back surface of the plate member. A raised portion surrounding the portion.

In addition, the plate member may include an enclosed portion surrounded by the raised portion, and a non-closed portion located outside the raised portion and flush with the enclosed portion.

In addition, the plate member may include an enclosed part surrounded by the raised part and a non-enclosed part located outside the raised part in the raised direction of the raised part rather than the enclosed part.

Further, a through hole may be further provided which is formed in the surrounding portion of the plate member and penetrates the plate member in the thickness direction.

Further, the raised portion may extend endlessly on one or both of the front surface and the back surface of the plate member.

Further, the raised portion may extend from one end to the other end on one or both of the front surface and the back surface of the plate member.

Further, the raised portion may be composed of a plurality of divided raised portions provided apart from each other.

According to the present disclosure, cost reduction and productivity improvement can be realized.

FIG. 1A is a schematic cross-sectional view of the furnace of the present embodiment, and FIG. 1B is a cross-sectional view taken along line I (b) -I (b) in FIG. It is an expanded view of a plate member. FIG. 3 is an enlarged view of a cross section taken along line III-III in FIG. 2. It is a figure explaining a 1st modification. FIG. 5A is a diagram illustrating a second modification, and FIG. 5B is a diagram illustrating a third modification. FIG. 6A is a diagram illustrating a fourth modification, and FIG. 6B is a diagram illustrating a fifth modification. FIG. 7A is a diagram for explaining a sixth modification, and FIG. 7B is a diagram for explaining a seventh modification.

Hereinafter, an aspect of an embodiment of the present disclosure will be described in detail with reference to the accompanying drawings. The dimensions, materials, and other specific numerical values shown in the embodiment are merely examples for facilitating understanding, and do not limit the present disclosure unless otherwise specified. In the present specification and drawings, elements having substantially the same function and configuration are denoted by the same reference numerals, and redundant description is omitted. Also, illustration of elements not directly related to the present disclosure is omitted.

Here, a furnace (heating furnace) will be described as an example of the indoor structure. However, the indoor structure described below is widely applicable to, for example, a refrigerator or the like that includes an indoor space that is higher or lower than the atmospheric temperature.

FIG. 1A is a schematic cross-sectional view of the furnace 1 of the present embodiment. FIG. 1B is a cross-sectional view taken along the line I (b) -I (b) of FIG. The furnace 1 of the present embodiment is configured by a so-called continuous heating furnace that continuously heats the object to be fired W during the conveyance process. The furnace 1 includes a furnace body 10 in which an internal space is formed. As shown in FIG. 1B, the furnace body 10 has an inner space surrounded by outer walls (upper outer wall 10a, lower outer wall 10b, left outer wall 10c, and right outer wall 10d). Further, as shown in FIG. 1A, the furnace body 10 extends linearly from the inlet side opening 10e to the outlet side opening 10f.

A partition plate 12 is provided in each of the inlet side opening 10e and the outlet side opening 10f. The inlet side opening 10e and the outlet side opening 10f are both openings that open the internal space to the outside. The inlet side opening 10e and the outlet side opening 10f are closed by the partition plate 12. In the partition plate 12, an insertion window 12a is formed near the center in the height direction. The transport band 20a of the transport unit 20 is inserted through the insertion window 12a.

The conveyance unit 20 includes a conveyance band 20a, a roller 20b, and a motor mechanism 20c. The conveyance band 20a is comprised with an endless belt, for example. The roller 20b supports a part of the transport band 20a from below in the furnace body 10. The motor mechanism 20c includes gears and a motor, and rotates the transport band 20a. The transport band 20a is rotated by the power of the motor mechanism 20c. The object to be fired W placed on the transport belt 20a is transported in the direction of the white arrow in FIG. 1A (hereinafter simply referred to as “transport direction”). The article to be fired W is carried into the furnace main body 10 from the inlet side opening 10e. The article to be fired W is carried out of the furnace body 10 at the outlet side opening 10f.

A heating unit 30 is provided in the furnace body 10. The heating unit 30 is composed of a hermetic gas heater. The heating unit 30 may be a radiant tube burner, a line burner, an infrared ceramic burner, an electric heater, or the like. Anyway, the heating part 30 should just function as a heat source which makes the furnace main body 10 the inside of a high temperature atmosphere. The heating unit 30 is provided vertically above and vertically below the transport band 20 a in the furnace body 10. The two heating units 30 are positioned so as to sandwich the transport band 20a in the vertical direction. A plurality of heating units 30 are arranged at predetermined intervals in the transport direction.

As shown in FIG. 1B, support holes 30a are formed in the left outer wall 10c and the right outer wall 10d of the furnace body 10, respectively. The support hole 30 a supports the heating unit 30. The support hole 30a penetrates the left outer wall 10c or the right outer wall 10d. During the manufacturing process and maintenance of the furnace 1, the heating unit 30 is inserted and removed from the support hole 30a.

A plate member 50 is provided in the furnace body 10. The plate member 50 holds the heat insulating material 40 (shown in black in FIGS. 1A and 1B) between the inner wall of the furnace body 10. The heat insulating material 40 is held between the outer wall of the furnace body 10 and the plate member 50. SS material is often used for the outer wall of the furnace body 10 in terms of cost. The plate member 50 serving as the inner wall is often made of a metal plate material such as austenitic SUS in consideration of heat resistance and oxidation resistance. As shown in FIG. 1B, the plate member 50 is provided to face the upper outer wall 10a, the lower outer wall 10b, the left outer wall 10c, and the right outer wall 10d. The plate member 50 constitutes the inner wall surface of the furnace space S (indoor space) where the workpiece W is provided. The entire circumference of the furnace body 10 is covered with a heat insulating material 40. Heat dissipation from the furnace body 10 is suppressed.

The plate member 50 provided inside the furnace body 10 is exposed to a high temperature atmosphere. Austenitic SUS has a coefficient of linear expansion that is about 1.5 times as large as that of the SS material that forms the outer wall. Therefore, the plate member 50 is deformed under the influence of heat. In the plate member 50, when the stress is partially concentrated, there is a possibility that a crack or a crack may occur. Therefore, it is conceivable to use a thick plate having a certain thickness as the plate member 50. However, when the plate thickness of the plate member 50 is increased, the manufacturing cost increases. Further, when the plate thickness of the plate member 50 is increased, heat is taken away by the plate member 50 during warm-up, and the warm-up time becomes long. The longer the warm-up time, the higher the running cost due to the deterioration in fuel consumption, the decrease in productivity, and the increase in labor costs.

The plate member 50 can be thinned by relaxing the stress concentration due to thermal deformation. By reducing the thickness of the plate member 50, manufacturing costs and running costs are suppressed, and productivity is improved. The plate member 50 is configured as follows. Hereinafter, as an example, the plate member 50 provided to face the left outer wall 10c and the right outer wall 10d will be described.

FIG. 2 is a development view of the plate member 50. FIG. 3 is an enlarged view of a cross section taken along line III-III in FIG. The plate member 50 includes a rectangular plane 50a. In the plate member 50, the upper side surface 50b, the lower side surface 50c, the left side surface 50d, and the right side surface 50e are bent by 90 ° in the same direction from four sides of the flat surface 50a. The upper side surface 50b, the lower side surface 50c, the left side surface 50d, and the right side surface 50e are provided with a plurality (two in this case) of fixing holes 52, respectively. A fastening member such as a screw is inserted into the fixing hole 52. The plate member 50 is fixed in the furnace body 10 by fixing the fastening member inserted through the fixing hole 52 inside the outer wall of the furnace body 10. In the furnace body 10, a plurality of plate members 50 are fixed adjacent to each other in the transport direction. Two plate members 50 adjacent to each other in the transport direction are connected to each other by a fastening member in which the left side surface 50d of one plate member 50 and the right side surface 50e of the other plate member 50 are inserted through the fixing holes 52.

A plurality (two in this case) of through holes 54 that penetrate the plate member 50 in the thickness direction are formed in the flat surface 50a. The through hole 54 faces the support hole 30a formed in the left outer wall 10c and the right outer wall 10d of the furnace body 10 when the plate member 50 is fixed in the furnace body 10. The heating unit 30 is supported by the support hole 30 a of the furnace body 10 in a state of penetrating the plate member 50 in the through hole 54. The through hole 54 may be provided as a peephole for monitoring the inside from the outside. The through hole 54 may be provided for the purpose of passing the exhaust pipe. The through hole 54 may be provided as a cleaning opening including an opening / closing door.

The plate member 50 is formed with a raised portion 100 (indicated by cross-hatching in FIG. 2) that protrudes from the flat surface 50a toward the furnace space S side. The raised portion 100 is formed by roller bead processing. The raised portion 100 includes a straight portion 100a that extends linearly along each of the four sides of the flat surface 50a. The raised portion 100 includes a curved portion 100b that is curved with a predetermined curvature and connects the ends of the two straight portions 100a. The raised portion 100 extends endlessly in the surface direction on the plate member 50 (plane 50a).

The straight part 100a of the raised part 100 is provided with a slight gap from the four sides. The plane 50a includes an encircling region 50ax and a non-encircling region 50ay. The surrounding portion 50ax is a portion surrounded by the raised portion 100. The non-enclosed region 50ay is located outside the raised portion 100. The surrounding part 50ax and the non-enclosing part 50ay are partitioned by the raised portion 100. As shown in FIG. 2, the surrounding area 50ax has a larger area than the non-enclosed area 50ay. However, the surrounding area 50ax and the non-enclosed area 50ay may have the same area. The surrounding part 50ax may have a smaller area than the non-enclosing part 50ay. As shown in FIG. 3, the surrounding part 50ax is flush with the non-enclosing part 50ay.

Two raised portions 110 (indicated by cross-hatching in FIG. 2) are formed at the surrounding portion 50ax surrounded by the raised portion 100 of the plate member 50. The raised portions 110 protrude from the plane 50a toward the furnace space S side. Similar to the raised portion 100, the raised portion 110 is also formed by roller bead processing. The raised portion 110 includes a straight portion 110a and a curved portion 110b. The straight line portion 110 a extends linearly along each of the four sides of the through hole 54. The curved portion 110b is curved with a predetermined curvature and connects the end portions of the two straight portions 110a. The raised portion 110 surrounds the through hole 54. The raised portion 110 extends endlessly in the surface direction on the plate member 50 (plane 50a).

As shown in FIG. 2, the straight portion 110 a of the raised portion 110 is provided with a slight gap from the four sides of the through hole 54. Of the plane 50a, the area surrounded by the raised portion 110 is smaller in area than the outside of the raised portion 110, that is, the area surrounded by the raised portion 100 and the raised portion 110. However, the area surrounded by the raised portion 110 may have the same area as the outside of the raised portion 110. The area surrounded by the raised portion 110 may have a larger area than the outside of the raised portion 110. As shown in FIG. 3, the portion surrounded by the raised portion 110 is flush with the outside of the raised portion 110.

The plate member 50 has the flat surface 50 a facing the furnace space S in the furnace body 10. The furnace space S is surrounded by the flat surface 50a. Therefore, the flat surface 50 a of the plate member 50 is most affected by the heat from the heating unit 30. When the flat surface 50a is deformed by the influence of heat, the edges of the flat surface 50a, that is, the upper side surface 50b, the lower side surface 50c, the left side surface 50d, the portion where the right side surface 50e and the flat surface 50a are continuous, each side of the through hole 54, etc. In particular, stress concentrates on the bent part. The stress acting on the bent portion increases in proportion to the amount of deformation near the bent portion.

In the plate member 50, a non-enclosed region 50 ay continuous with the bent region is partitioned from the enclosed region 50 ax by the raised portion 100. In the flat surface 50a, the strength of the raised portion 100 is higher than that of other portions. The deformation occurring in the surrounding portion 50ax is blocked by the raised portion 100. In other words, the propagation of the stress generated by the deformation of the surrounding region 50ax to the non-enclosed region 50ay is blocked or reduced by the raised portion 100. The amount of deformation at the non-enclosed region 50ay is smaller than when there is no raised portion 100. Stress concentration at the bent portion is alleviated. Since the area of the non-enclosed part 50ay is smaller than the area of the enclosed part 50ax, the stress concentration at the bent part is further reduced.

The through hole 54 is partitioned from the surrounding portion 50ax by the raised portion 110. Propagation of stress generated by deformation of the surrounding portion 50ax to the through hole 54 is blocked or reduced by the raised portion 110. The stress concentration at the bent portion such as each side of the through hole 54 is also alleviated. Since the plate member 50 is deformed to reduce thermal stress, durability can be improved. The plate member 50 can be easily processed by an automatic machine.

Hereinafter, modifications of the plate member 50 in the above embodiment will be described. In the following, portions different from the above embodiment will be described. Portions that are substantially or functionally the same as those in the above embodiment are given the same reference numerals as those described above, and descriptions thereof are omitted.

FIG. 4 is a diagram illustrating a first modification. In the said embodiment, the case where the protruding

parts

100 and 110 were formed in the plane 50a of the board member 50 by roller bead processing was demonstrated. In the plate member 50A of the first modified example, raised

portions

120 and 130 are formed at the same position as the plate member 50 of the above-described embodiment, for example, by pressing. The raised portion 120 is raised from the flat surface 50a of the plate member 50A toward the in-furnace space S side. The raised portion 120 divides the surrounding part 50ax and the non-enclosing part 50ay. The surrounding part 50ax is a part surrounded by the raised portion 120 in the plane 50a. The non-enclosed part 50ay is located outside the raised portion 120 with respect to the surrounding part 50ax. The surrounding portion 50ax is located in the protruding direction of the protruding portion 120 with respect to the non-enclosed portion 50ay. In other words, on the flat surface 50a of the plate member 50A, a step is formed by the raised portion 120 between the surrounding part 50ax and the non-enclosing part 50ay. That is, the raised portion 120 can be said to be a stepped portion.

The raised portion 130 is configured in the same manner as the raised portion 120. Of the plane 50 a, a portion surrounded by the raised portion 130 (for example, a portion in which the through hole 54 is provided in FIG. 4) is located closer to the furnace space S than the outside of the raised portion 130. As in the first modification, the raised

portions

120 and 130 are stepped portions. The height position of the surrounding part 50ax on the plane 50a may be different from the height position of the non-enclosing part 50ay. Also in this case, the propagation of stress caused by the deformation of the surrounding portion 50ax is blocked or reduced. Stress concentration at the bent portion is alleviated. According to the 1st modification, compared with the said embodiment, a wrinkle is hard to approach to the plane 50a, and a process becomes easy.

FIG. 5A is a diagram for explaining a second modification. FIG. 5B is a diagram for explaining a third modification. In the embodiment and the first modification, the plate member 50 having the through hole 54 formed in the flat surface 50a is provided on the left outer wall 10c or the right outer wall 10d. When the plate member 50 is provided on the upper outer wall 10a or the lower outer wall 10b, the through hole 54 through which the heating unit 30 is inserted is not essential. In the following second to seventh modifications, the through hole 54 is not provided in the flat surface 50a. However, similarly to the above-described embodiment and the first modification, in the second to seventh modifications, the through hole 54 may be provided in the plane 50a.

The plate member 50B of the second modified example shown in FIG. 5A has elliptical raised

portions

140, 150, and 160 formed on a flat surface 50a as shown by cross hatching in the drawing. According to the plate member 50 </ b> B, the surrounding part 50 ax and the non-enclosing part 50 ay are partitioned by the raised portion 140. The surrounding portion 50ax is divided into three regions by the raised

portions

150 and 160. The surrounding part 50ax and the non-enclosing part 50ay may be flush with each other as in the above embodiment. The height positions of the surrounding part 50ax and the non-enclosing part 50ay may be different between the surrounding part 50ax and the non-enclosing part 50ay as in the first modified example. The surrounding portion 50ax may have a different height position for each partitioned area.

In the plate member 50C of the third modification shown in FIG. 5B, as shown by cross hatching in the drawing, substantially rectangular raised

portions

170, 180, 190 are formed on the flat surface 50a. In the plate member 50 </ b> C, the surrounding part 50 ax and the non-enclosing part 50 ay are partitioned by the raised portion 170. The surrounding portion 50ax is divided into three regions by the raised

portions

180 and 190. The center position of the raised portion 180 is located above the center position of the raised portion 170 in the drawing. The center position of the raised portion 190 is located above the center position of the raised portion 180 in the drawing.

In the plate member 50C, the area of one section surrounded by the raised

portions

170, 180, 190 is smaller in the upper part in the drawing than in the lower part in the drawing. In the plate member 50C, it can be said that the occupying area of the raised

portions

170, 180, 190 is larger in the upper part in the drawing than in the lower part in the drawing. For example, when the upper temperature is higher than the lower temperature in the furnace body 10, the plate member 50C is provided on the left outer wall 10c or the right outer wall 10d. And the center position of the protruding

parts

180 and 190 is located above the to-be-baked product W and the conveyance belt | band | zone 20a. In a place relatively close to the heat source or a place where a high temperature atmosphere is provided, the area of one section surrounded by the raised

portions

170, 180, 190 is reduced. The area occupied by the raised

portions

170, 180, and 190 increases in a place that is relatively close to the heat source or in a place that has a high temperature atmosphere. The plate member 50C is partially different in the occupied area of the raised

portions

170, 180, 190 per unit area. According to the plate member 50C, the area of one section is reduced where the amount of deformation increases due to heat. The deformation amount of the entire plane 50a is suppressed. Also in the third modification, the surrounding part 50ax and the non-enclosing part 50ay may be flush with each other. Moreover, the height position of the surrounding region 50ax and the non-enclosed region 50ay may be different.

FIG. 6A is a diagram for explaining a fourth modification. FIG. 6B is a diagram for explaining a fifth modification. In the plate member 50D of the fourth modified example shown in FIG. 6A, a plurality (four in this case) of circular raised portions 200 are formed on the flat surface 50a as shown by cross hatching in the drawing. According to the plate member 50D, the surrounding ranges of the raised portions 200 do not overlap. Each raised portion 200 surrounds a different part of the plane 50a. According to the plate member 50D, a plurality of surrounding parts 50ax are formed in different ranges of the flat surface 50a. A non-enclosed region 50ay is formed outside each enclosed region 50ax. Also in the fourth modification, the surrounding part 50ax and the non-enclosing part 50ay may be flush with each other. The height positions of the surrounding part 50ax and the non-enclosing part 50ay may be different.

In the plate member 50E of the fifth modified example shown in FIG. 6B, as shown by cross hatching in the drawing, the raised portion 210 is formed on the flat surface 50a. The raised portion 210 has an elliptical shape with a part of the continuity cut off. The raised portion 210 extends in an elliptical shape from one end 210a to the other end 210b in the surface direction of the plate member 50E. A gap 212 is formed between the one end 210a and the other end 210b. Also in the plate member 50 </ b> E, the flat surface 50 a is partitioned into an encircling region 50 ax located inside the raised portion 210 and a non-enclosed region 50 ay located outside the raised portion 210. In the plate member 50E, the continuity of the raised portion 210 is partially broken. Therefore, in the gap 212, the surrounding part 50ax and the non-enclosing part 50ay are continuous in the surface direction.

There is a portion where the raised portion 210 is not interposed between the surrounding portion 50ax and the non-going portion 50ay. Even in this case, the stress concentration acting on the bent portion is relaxed. As the gap 212 increases, the effect of reducing stress concentration diminishes. When there is a continuous portion where the raised portion 210 is not interposed between the surrounding portion 50ax and the non-enclosed portion 50ay like the gap 212, the outer peripheral length L1 of the surrounding portion 50ax in contact with the continuous portion is the total of the surrounding portion 50ax. It is desirable that it is not more than half of the outer peripheral length L1 + L2.

In addition, in this specification, the range of the surrounding site | part 50ax when a continuous site | part exists is defined as follows. That is, the surrounding part 50ax is a range surrounded by the imaginary line connecting the parts of the ridges 210 that are closest to each other across the continuous part and the ridges 210. In the fifth modified example, the range surrounded by the imaginary line connecting the one end 210a and the other end 210b and the raised portion 210 is the surrounding portion 50ax. In the present specification, “go” does not mean that the surrounding portion 50ax and the non-going portion 50ay are completely partitioned by the raised portions. The “go” includes a case where the surrounding part 50ax and the non-going part 50ay have a continuous part. Also in the fifth modification, the surrounding part 50ax and the non-enclosing part 50ay may be flush with each other. The height positions of the surrounding part 50ax and the non-enclosing part 50ay may be different.

FIG. 7A is a diagram for explaining a sixth modification. FIG. 7B is a diagram for explaining a seventh modification. The plate member 50F of the sixth modified example shown in FIG. 7A has a raised portion 220 formed on a flat surface 50a, as shown by cross hatching in the drawing. The raised portion 220 has a quadrangular shape with a portion of the continuity cut off. The raised portion 220 includes a plurality of divided raised

portions

220a, 220b, 220c, and 220d that are provided apart from each other. The divided raised

portions

220a, 220b, 220c, and 220d each extend linearly along the four sides of the plate member 50F.

The divided

ridges

220a and 220b are arranged to face each other in the vertical direction in the figure. The divided

ridges

220c and 220d are arranged to be opposed to each other in the left-right direction in the drawing. A gap 222 is formed between both ends of the divided

ridges

220a and 220b and both ends of the divided

ridges

220c and 220d. Also in the plate member 50 </ b> F, the flat surface 50 a is partitioned into an encircling part 50 ax located inside the raised part 220 and a non-enclosed part 50 ay located outside the raised part 220. In the plate member 50F, like the plate member 50E of the fifth modified example, the continuity of the raised portion 220 is partially cut off. In the gap 222, the surrounding part 50ax and the non-enclosing part 50ay are continuous in the surface direction.

Even if there is a portion where the raised portion 220 does not exist between the surrounding portion 50ax and the non-around portion 50ay, the stress concentration acting on the bent portion is alleviated. Similarly to the above, the total outer peripheral length of the surrounding region 50ax in contact with the gap 222 (continuous region) (the total length of imaginary lines indicated by broken lines in the drawing) is not more than half of the entire outer peripheral length of the surrounding region 50ax. desirable. Also in the sixth modification, the surrounding part 50ax and the non-enclosing part 50ay may be flush with each other. The height positions of the surrounding part 50ax and the non-enclosing part 50ay may be different.

As shown in FIG. 7B, the plate member 50G of the seventh modified example has a raised portion 230 formed on a flat surface 50a as shown by cross hatching in the drawing. The raised portion 230 includes a plurality of (in this case, two) divided raised

portions

230a and 230b extending in a substantially semicircular shape. Similarly to the fifth and sixth modifications, the raised portion 230 is also formed with a gap 232 (continuous portion) in which the surrounding portion 50ax and the non-enclosing portion 50ay are continuous in the surface direction. The total outer peripheral length of the surrounding region 50ax in contact with the gap 232 (continuous region) (the total length of imaginary lines indicated by broken lines in the figure) is less than half of the total outer peripheral length of the surrounding region 50ax. The plate member 50G also relieves stress concentration that acts on the bent portion. Also in the seventh modification, the surrounding part 50ax and the non-enclosing part 50ay may be flush with each other. The height positions of the surrounding part 50ax and the non-enclosing part 50ay may be different.

The embodiment has been described above with reference to the accompanying drawings. Needless to say, the present disclosure is not limited to the configuration of the embodiment. It will be apparent to those skilled in the art that various changes and modifications can be made within the scope of the claims and that they naturally fall within the technical scope.

In the second modified example, as shown in FIG. 4, the raised portion 120 and the raised portion 130 are raised in the same direction. The protruding direction of the protruding portion 130 may be opposite to the protruding direction of the protruding portion 120. For example, when a plurality of raised portions are provided like the plate member 50B of the third modified example, the plate member 50C of the fourth modified example, and the plate member 50D of the fifth modified example, the raised direction differs depending on the raised portions. Also good. When a plurality of raised portions are provided, the raised height may be different depending on the raised portions.

Moreover, in the said embodiment, the protruding

parts

100 and 110 provided in the board member 50 are formed in the plane 50a (surface) which faces the space S in a furnace. The raised

portions

100 and 110 may be formed on a surface (back surface) located on the side opposite to the furnace space S, that is, on the heat insulating material 40 side. The raised

portions

100 and 110 may be formed on both the front surface and the back surface. The raised

portions

120, 130, 140, 150, 160, 170, 180, 190, 200, 210, 220, 230 of the first to seventh modifications are formed on the back surface opposite to the furnace space S. Also good.

It goes without saying that the shape of the raised portion and the processing method in the embodiment and each modification are merely examples, and the design can be changed as appropriate.

In the above embodiment, the case where the furnace 1 is a continuous heating furnace has been described. The furnace 1 is not limited to a continuous heating furnace. For example, the furnace 1 may have a configuration in which the object to be fired W is not placed in the in-furnace space S without the conveyance unit 20.

In the above embodiment, the indoor structure of the furnace 1 has been described. The indoor structure described above is not limited to a furnace, but a container, a storage tank, a manufacturing apparatus, and a heating device in which the indoor space is cooler or hotter than the outside of the indoor structure (for example, atmospheric temperature) (a temperature difference occurs inside and outside the indoor structure). Widely applicable to devices, refrigerators, etc.

The present disclosure can be used for a furnace structure in which a furnace space is formed.

W: Substrate S:

Furnace space

50, 50A, 50B, 50C, 50D, 50E, 50F, 50G: Plate member 50ax: Surrounding part 50ay: Non-enclosed part 54: Through

hole

100, 110, 120, 130, 140 , 150, 160, 170, 180, 190, 200, 210, 220, 230: raised

portions

220a, 220b, 220c, 220d, 230a, 230b: divided raised portions

Claims

A plate member constituting the inner wall surface of the furnace space;
A raised portion that protrudes from one or both of the front surface and the back surface of the plate member, and surrounds a part of the front surface or the back surface;
Furnace structure with
The plate member is
2. The in-furnace structure according to claim 1, wherein the in-furnace structure includes an enclosing portion surrounded by the raised portion, and a non-enclosed portion located outside the raised portion and flush with the surrounding portion.
The plate member is
2. The in-furnace structure according to claim 1, further comprising: an enclosed part surrounded by the raised part; and a non-enclosed part located outside the raised part in the raised direction of the raised part with respect to the raised part.
The in-furnace structure according to claim 2 or 3, further comprising a through hole formed in the surrounding portion of the plate member and penetrating the plate member in a thickness direction.
The in-furnace structure according to any one of claims 1 to 4, wherein the raised portion extends endlessly on one or both of the front surface and the back surface of the plate member.
The in-furnace structure according to any one of claims 1 to 4, wherein the raised portion extends from one end to the other end on one or both of the front surface and the back surface of the plate member.
The in-furnace structure according to any one of claims 1 to 4, wherein the raised portion includes a plurality of divided raised portions that are provided apart from each other.