【図面の簡単な説明】[Brief explanation of the drawing]
第１０図は従来のスタツドを取付けた火炉管壁
の一部展開図（第１１図の−矢視図）であり
、第１１図は第１０図の−矢視断面図で
あり、第１図は本考案に係わる第一実施例のスタ
ツドを火炉管壁に取り付けた火炉管壁の矢視側面
図である。第２図から第３図は本考案に係わる第
二実施例を示す図で、根部が帯状のスタツドを火
炉管に取り付けた火炉管壁の断面図で、第３図は
第２図に図示のスタツドの側面図である。また第
４図から第９図は、本考案に係わる各実施例のス
タツドを示す側面図で、第４，５図は、全体が帯
状のスタツドを、第６図から第９図は根部が帯状
のスタツドを示している。
２０…フイン、１１，２１，５１，６１，７１
，８１…根部が帯状のスタツド、３１，４１…全
体が帯状のスタツド、１１ａ，２１ａ，５１ａ，
６１ａ，７１ａ，８１ａ…各スタツドの先端部、
２１ｂ…各スタツドの切込み、５１ｂ，６１ｂ，
７１ｂ，８１ｂ…各スタツドの切欠部、１２，２
２…火炉管、１３，２３…断熱材、１１ｃ，２１
ｃ，３１ｃ，４１ｃ，５１ｃ，６１ｃ，７１ｃ，
８１ｃ…各スタツドの根部、１２ａ，２２ａ…火
炉管の嵌合溝。
Fig. 10 is a partially exploded view of a furnace tube wall with a conventional stud attached (a view viewed from the - arrow in Fig. 11), Fig. 11 is a sectional view taken from the - arrow in Fig. 10, and Fig. 1 FIG. 1 is a side view of a furnace tube wall in which a stud according to a first embodiment of the present invention is attached to the furnace tube wall; Figures 2 and 3 are views showing a second embodiment of the present invention, and are cross-sectional views of the furnace tube wall in which a stud with a band-shaped root is attached to the furnace tube. FIG. 3 is a side view of the stud. Furthermore, FIGS. 4 to 9 are side views showing studs of various embodiments according to the present invention, and FIGS. 4 and 5 show studs that are entirely band-shaped, and FIGS. 6 to 9 show studs whose roots are band-shaped. It shows the studs. 20... Finn, 11, 21, 51, 61, 71
, 81... Stud whose root part is band-shaped, 31, 41... Stud whose entire part is band-shaped, 11a, 21a, 51a,
61a, 71a, 81a... the tip of each stud,
21b...notch of each stud, 51b, 61b,
71b, 81b...Notch of each stud, 12, 2
2...Furnace tube, 13, 23...Insulating material, 11c, 21
c, 31c, 41c, 51c, 61c, 71c,
81c...root of each stud, 12a, 22a...furnace tube fitting groove.