JP6878661B1 - Conveying roller support device for atmosphere heating furnace - Google Patents

Conveying roller support device for atmosphere heating furnace Download PDF

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JP6878661B1
JP6878661B1 JP2020128659A JP2020128659A JP6878661B1 JP 6878661 B1 JP6878661 B1 JP 6878661B1 JP 2020128659 A JP2020128659 A JP 2020128659A JP 2020128659 A JP2020128659 A JP 2020128659A JP 6878661 B1 JP6878661 B1 JP 6878661B1
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bearing
atmospheric gas
rolling bearings
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furnace body
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上士 岡島
上士 岡島
千浩 中嶋
千浩 中嶋
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Noritake Co Ltd
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Abstract

【課題】支持軸を回転可能に支持する転がり軸受の耐久性を高めることができる雰囲気加熱炉用搬送ローラ支持装置を提供する。【解決手段】搬送ローラ22の軸端部24にそれぞれ嵌め入れられて搬送ローラ22を支持する支持軸44を転がり軸受60,62を介して回転可能に支持する軸受部材38を有する雰囲気加熱炉用搬送ローラ支持装置10であって、転がり軸受60,62は、支持軸44の回転中心線C1方向に所定の間隔を隔てて軸受部材38に嵌め着けられ、冷却用雰囲気ガス供給源72からの雰囲気ガスを、転がり軸受60,62に直接供給する転がり軸受冷却管70を備えている。このため、転がり軸受60,62に雰囲気ガスが直接供給されるので、支持軸44を回転可能に支持する転がり軸受60,62の耐久性が高められる。【選択図】図2PROBLEM TO BE SOLVED: To provide a transfer roller support device for an atmosphere heating furnace capable of increasing the durability of a rolling bearing that rotatably supports a support shaft. SOLUTION: For an atmosphere heating furnace having a bearing member 38 which is fitted into a shaft end 24 of a transfer roller 22 and rotatably supports a support shaft 44 which supports the transfer roller 22 via rolling bearings 60 and 62. In the transport roller support device 10, the rolling bearings 60 and 62 are fitted to the bearing members 38 at predetermined intervals in the direction of the rotation center line C1 of the support shaft 44, and the atmosphere from the cooling atmosphere gas supply source 72. A rolling bearing cooling pipe 70 that directly supplies gas to the rolling bearings 60 and 62 is provided. Therefore, since the atmospheric gas is directly supplied to the rolling bearings 60 and 62, the durability of the rolling bearings 60 and 62 that rotatably support the support shaft 44 is enhanced. [Selection diagram] Fig. 2

Description

本発明は、炉体の側壁から突き出す複数本の搬送ローラの端部を回転可能に支持する雰囲気加熱炉用搬送ローラ支持装置に関するものである。 The present invention relates to a transfer roller support device for an atmosphere heating furnace that rotatably supports the ends of a plurality of transfer rollers protruding from the side wall of the furnace body.

管通路状の炉室を有する炉体と、その炉体の側壁に形成された複数個の貫通穴を通して互いに平行な状態でその炉体の長手方向に配設された複数本の搬送ローラとを備え、それら複数本の搬送ローラを回転駆動することにより、管通路状の炉室内で搬送ローラ上の被加熱物を搬送しつつ熱処理を施す加熱炉が知られている。このような加熱炉は、所謂ローラハースキルン(RHK)と称されるものであり、たとえば特許文献1に記載されている。 A furnace body having a furnace chamber in the shape of a pipe passage and a plurality of transfer rollers arranged in the longitudinal direction of the furnace body in a state parallel to each other through a plurality of through holes formed in the side wall of the furnace body. A heating furnace is known in which heat treatment is performed while transporting an object to be heated on the transport rollers in a pipe passage-shaped furnace chamber by rotationally driving these a plurality of transport rollers. Such a heating furnace is a so-called roller kiln (RHK), and is described in, for example, Patent Document 1.

上記加熱炉では、搬送ローラの円筒状端部が炉体の側壁に形成された貫通穴を通して突き出され、その搬送ローラの円筒状端部に嵌め入れられた支持軸が、一対の内側軸受および外側軸受を介してそれぞれ回転可能に支持されている。 In the heating furnace, the cylindrical end of the transfer roller is projected through a through hole formed in the side wall of the furnace body, and the support shaft fitted in the cylindrical end of the transfer roller is a pair of inner bearings and an outer side. Each is rotatably supported via bearings.

上記加熱炉は雰囲気加熱炉であり、その炉体の側壁には、炉内の雰囲気ガスの漏れを抑制するために、炉体の側壁に形成された貫通穴を覆うカバーケースが設けられている。そのカバーケースの外壁板にはシール付きの内側軸受が嵌め付けられ、その外壁板の外側に軸受ブラケットを介して固定された支持板には外側軸受が嵌め付けられていて支持軸が回転可能に支持されている。 The heating furnace is an atmospheric heating furnace, and a cover case is provided on the side wall of the furnace body to cover a through hole formed in the side wall of the furnace body in order to suppress leakage of atmospheric gas in the furnace. .. An inner bearing with a seal is fitted to the outer wall plate of the cover case, and an outer bearing is fitted to a support plate fixed to the outside of the outer wall plate via a bearing bracket so that the support shaft can rotate. It is supported.

特開平07−090352号公報Japanese Unexamined Patent Publication No. 07-090352

ところで、特許文献1に記載されているような雰囲気加熱炉では、カバーケース内は搬送ローラを通すための貫通穴を介して炉内空間と連通していて、炉内空間の高温の雰囲気ガスが漏出するので、軸受が高温となり易い。このため、軸受内のシール部材やグリスが早期に劣化して耐久性が損なわれるので、軸受の交換作業を頻繁に行なう必要があるという問題があった。 By the way, in an atmosphere heating furnace as described in Patent Document 1, the inside of the cover case communicates with the inside space through a through hole for passing a transfer roller, and the high temperature atmosphere gas in the inside space is emitted. Since it leaks, the bearing tends to get hot. For this reason, there is a problem that the sealing member and grease in the bearing are deteriorated at an early stage and the durability is impaired, so that it is necessary to frequently replace the bearing.

本発明は以上の事情を背景として為されたものであり、その目的とするところは、支持軸を回転可能に支持する軸受の耐久性を高めることができる雰囲気加熱炉用搬送ローラ支持装置を提供することにある。 The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a transfer roller support device for an atmosphere heating furnace capable of increasing the durability of a bearing that rotatably supports a support shaft. To do.

本発明者は、上記の課題を解決するために種々の検討を重ねた結果、搬送ローラの軸端部を支持する転がり軸受に雰囲気ガスを供給すると、転がり軸受が雰囲気ガスによって積極的に冷却され、転がり軸受の耐久性が高められることを見出した。本発明はこのような知見に基づいて為されたものである。 As a result of various studies to solve the above problems, the present inventor supplies atmospheric gas to the rolling bearing that supports the shaft end of the transport roller, and the rolling bearing is positively cooled by the atmospheric gas. , Found that the durability of rolling bearings is enhanced. The present invention has been made based on such findings.

すなわち、本発明の要旨とするところは、(a)管通路状の炉室を有する炉体と、互いに平行な状態で前記炉体の長手方向に配設された複数本の円筒状の搬送ローラとを備え、前記複数本の搬送ローラ上の被加熱物を前記炉体内で搬送しつつ雰囲気ガス中で熱処理を施す雰囲気加熱炉において、前記搬送ローラの軸端部にそれぞれ嵌め入れられて前記搬送ローラを支持する支持軸を転がり軸受を介して回転可能に支持する軸受部材を、有する雰囲気加熱炉用搬送ローラ支持装置であって、(b)前記転がり軸受は、前記支持軸の回転中心線方向に所定の間隔を隔てて前記軸受部材に嵌め着けられ、(c)雰囲気ガス供給源からの雰囲気ガスを、前記転がり軸受に直接供給する雰囲気ガス供給装置を、備え、(d)前記複数本の搬送ローラの軸端部は、前記炉体の側壁に形成された複数個の貫通穴から突き出し、(e)前記軸受部材は、前記炉体に設けられた気密なカバーケースにより覆われた状態で前記炉体の側壁に沿って配置され、(f)前記転がり軸受は、一対の転がり軸受であり、前記雰囲気ガス供給装置は、前記一対の転がり軸受のうちの少なくとも一方に前記雰囲気ガスを直接供給するものであり、(g)前記雰囲気ガス供給装置は、前記軸受部材に嵌め着けられた前記一対の転がり軸受の間の空間に、前記雰囲気ガス供給源からの雰囲気ガスを直接供給するものであり、(h)前記一対の転がり軸受の内輪は前記支持軸に対してすきま嵌めされ、前記一対の転がり軸受の内輪と前記支持軸との間で前記雰囲気ガス供給源からの雰囲気ガスの通過が許容されていることにある。 That is, the gist of the present invention is (a) a furnace body having a pipe passage-shaped furnace chamber, and a plurality of cylindrical transfer rollers arranged in the longitudinal direction of the furnace body in a state parallel to each other. In an atmosphere heating furnace in which the objects to be heated on the plurality of transfer rollers are conveyed in the furnace body and heat-treated in the atmosphere gas, the objects to be heated are fitted into the shaft ends of the transfer rollers and conveyed. An atmosphere heating furnace transport roller support device having a bearing member that rotatably supports a support shaft that supports the rollers via a rolling bearing. (B) The rolling bearing is in the direction of the rotation center line of the support shaft. The bearing member is fitted with the atmospheric gas at a predetermined interval, and (c) the atmospheric gas supply device for directly supplying the atmospheric gas from the atmospheric gas supply source to the rolling bearing is provided , and (d) the plurality of the atmospheric gas supply devices. The shaft end of the transfer roller protrudes from a plurality of through holes formed in the side wall of the furnace body, and (e) the bearing member is covered with an airtight cover case provided in the furnace body. Arranged along the side wall of the furnace body, (f) the rolling bearing is a pair of rolling bearings, and the atmospheric gas supply device directly supplies the atmospheric gas to at least one of the pair of rolling bearings. (G) The atmosphere gas supply device directly supplies the atmosphere gas from the atmosphere gas supply source to the space between the pair of rolling bearings fitted to the bearing member. (H) The inner ring of the pair of rolling bearings is clearance-fitted with respect to the support shaft, and the passage of atmospheric gas from the atmospheric gas supply source is permitted between the inner ring of the pair of rolling bearings and the support shaft. It is to be done.

本発明の雰囲気加熱炉用の搬送ローラ支持装置によれば、(b)前記転がり軸受は、前記支持軸の回転中心線方向に所定の間隔を隔てて前記軸受部材に嵌め着けられ、(c)雰囲気ガス供給源からの雰囲気ガスを、前記転がり軸受に直接供給する雰囲気ガス供給装置が、備えられ、(d)前記複数本の搬送ローラの軸端部は、前記炉体の側壁に形成された複数個の貫通穴から突き出し、(e)前記軸受部材は、前記炉体に設けられた気密なカバーケースにより覆われた状態で前記炉体の側壁に沿って配置され、(f)前記転がり軸受は、一対の転がり軸受であり、前記雰囲気ガス供給装置は、前記一対の転がり軸受のうちの少なくとも一方に前記雰囲気ガスを直接供給するものであり、(g)前記雰囲気ガス供給装置は、前記軸受部材に嵌め着けられた前記一対の転がり軸受の間の空間に、前記雰囲気ガス供給源からの雰囲気ガスを直接供給するものであり、(h)前記一対の転がり軸受の内輪は前記支持軸に対してすきま嵌めされ、前記一対の転がり軸受の内輪と前記支持軸との間で前記雰囲気ガス供給源からの雰囲気ガスの通過が許容されている。このため、前記転がり軸受に雰囲気ガスが直接供給されるので、支持軸を回転可能に支持する一対の転がり軸受の耐久性が高められる。また、炉体の側壁に形成された貫通穴から突き出した搬送ローラの軸端部が、炉体の側壁に沿って配置された軸受部材により一対の転がり軸受を介して回転可能に支持された支持軸により支持される場合において、雰囲気ガス供給装置は、一対の転がり軸受のうちの少なくとも一方に前記雰囲気ガスを直接供給するので、支持軸を回転可能に支持する一対の転がり軸受の耐久性が高められる。また、一対の転がり軸受および支持軸が冷却されるので、支持軸を回転可能に支持する一対の転がり軸受の耐久性が高められる。さらに、前記一対の転がり軸受の間の空間に供給された雰囲気ガスの通過により、一対の転がり軸受および支持軸が一層冷却されるので、支持軸を回転可能に支持する一対の転がり軸受の耐久性が一層高められる。 According to the transfer roller support device for an atmosphere heating furnace of the present invention, (b) the rolling bearing is fitted to the bearing member at a predetermined interval in the direction of the rotation center line of the support shaft, and (c). An atmospheric gas supply device for directly supplying the atmospheric gas from the atmospheric gas supply source to the rolling bearing is provided , and (d) the shaft ends of the plurality of transport rollers are formed on the side wall of the furnace body. Protruding from a plurality of through holes, (e) the bearing member is arranged along the side wall of the furnace body in a state of being covered by an airtight cover case provided in the furnace body, and (f) the rolling bearing. Is a pair of rolling bearings, the atmospheric gas supply device directly supplies the atmospheric gas to at least one of the pair of rolling bearings, and (g) the atmospheric gas supply device is the bearing. Atmospheric gas from the atmospheric gas supply source is directly supplied to the space between the pair of rolling bearings fitted to the member, and (h) the inner ring of the pair of rolling bearings is relative to the support shaft. It is crevice-fitted and allows the passage of atmospheric gas from the atmospheric gas supply source between the inner ring of the pair of rolling bearings and the support shaft . Therefore, since the atmospheric gas is directly supplied to the rolling bearing, the durability of the pair of rolling bearings that rotatably support the support shaft is enhanced. Further, a support in which the shaft end portion of the transport roller protruding from the through hole formed in the side wall of the furnace body is rotatably supported via a pair of rolling bearings by bearing members arranged along the side wall of the furnace body. When supported by a shaft, the atmospheric gas supply device directly supplies the atmospheric gas to at least one of the pair of rolling bearings, so that the durability of the pair of rolling bearings that rotatably support the support shaft is enhanced. Be done. Further, since the pair of rolling bearings and the support shaft are cooled, the durability of the pair of rolling bearings that rotatably support the support shaft is enhanced. Further, the passage of the atmospheric gas supplied to the space between the pair of rolling bearings further cools the pair of rolling bearings and the support shaft, so that the durability of the pair of rolling bearings that rotatably support the support shafts is durable. Is further enhanced.

本発明の一実施例の雰囲気加熱炉用搬送ローラ支持装置が加熱炉に取り付けられた状態を示す断面図である。It is sectional drawing which shows the state which the transfer roller support device for an atmosphere heating furnace of one Example of this invention is attached to a heating furnace. 図1の雰囲気加熱炉用搬送ローラ支持装置を拡大して説明する図である。It is a figure which expands and explains the transfer roller support device for the atmosphere heating furnace of FIG. 図2の雰囲気加熱炉用搬送ローラ支持装置の側面図である。It is a side view of the transfer roller support device for an atmosphere heating furnace of FIG. 本発明の他の実施例の雰囲気加熱炉用搬送ローラ支持装置を説明する図であって、図2に相当する図である。It is a figure explaining the transfer roller support device for an atmosphere heating furnace of another Example of this invention, and is the figure corresponding to FIG. 図4の雰囲気加熱炉用搬送ローラ支持装置の側面図である。It is a side view of the transfer roller support device for an atmosphere heating furnace of FIG. 本発明のさらに他の実施例の雰囲気加熱炉用搬送ローラ支持装置を説明する図であって、図2に相当する図である。It is a figure explaining the transfer roller support device for the atmosphere heating furnace of still another Example of this invention, and is the figure corresponding to FIG.

以下、本発明の一実施例を図面を参照して詳細に説明する。なお、以下の実施例において図は発明に関連する要部を説明するものであり、寸法および形状等は必ずしも正確に描かれていない。 Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. In the following examples, the drawings explain the main parts related to the invention, and the dimensions, shapes, and the like are not necessarily drawn accurately.

図1は、本発明の一実施例の雰囲気加熱炉用搬送ローラ支持装置10(以下、搬送ローラ支持装置10という)を備えた雰囲気加熱炉12を示す断面図である。雰囲気加熱炉12は、磁器、セラミックス電子部品、炭素繊維等の焼成や、ホーロー製品、衛生陶器等の釉焼に適用されるローラハースキルン型の熱処理炉である。雰囲気加熱炉12は、耐熱レンガ、セラミックボード等の断熱材およびその断熱材を包被するケーシングによって形成された炉体14を備えている。また、雰囲気加熱炉12は、被熱処理物をたとえば大気中或いは不活性ガス中で連続的に熱処理するために炉体14の長手方向に被熱処理物が搬送される管通路状(トンネル状)に形成された炉室16を備えている。 FIG. 1 is a cross-sectional view showing an atmosphere heating furnace 12 provided with a transfer roller support device 10 for an atmosphere heating furnace (hereinafter, referred to as a transfer roller support device 10) according to an embodiment of the present invention. The atmosphere heating furnace 12 is a roller herskirn type heat treatment furnace applied to firing porcelain, ceramic electronic parts, carbon fibers and the like, and glaze firing of enamel products, sanitary ware and the like. The atmosphere heating furnace 12 includes a furnace body 14 formed of a heat insulating material such as a heat-resistant brick or a ceramic board and a casing covering the heat insulating material. Further, the atmosphere heating furnace 12 has a pipe passage shape (tunnel shape) in which the heat treatment object is conveyed in the longitudinal direction of the furnace body 14 in order to continuously heat treat the heat treatment object in, for example, the atmosphere or an inert gas. The formed furnace chamber 16 is provided.

炉体14の両側に位置する側壁18の上下方向中央部付近には、側壁18をそれぞれ貫通した状態で被熱処理物の搬送方向と直交する方向に長手状を成し、互いに平行な状態で炉体14の長手方向すなわち被熱処理物の搬送方向に一定間隔で配列された複数本の搬送ローラ22が水平に設置されている。搬送ローラ22の両軸端部24は、側壁18に形成された貫通穴18a内に挿通された状態で配置されており、側壁18外へ突き出されている。 Near the center of the side wall 18 located on both sides of the furnace body 14 in the vertical direction, the side wall 18 is formed in a longitudinal direction perpendicular to the transport direction of the object to be heat-treated while penetrating the side wall 18, and the furnace is parallel to each other. A plurality of transport rollers 22 arranged at regular intervals in the longitudinal direction of the body 14, that is, the transport direction of the object to be heat-treated are horizontally installed. Both shaft end portions 24 of the transport roller 22 are arranged in a state of being inserted into a through hole 18a formed in the side wall 18, and project out of the side wall 18.

炉体14の側壁18に形成された貫通穴18aと炉体14の側壁18外に突き出された搬送ローラ22の両軸端部24とは、炉室16内の雰囲気ガスの漏れを抑制するために、ほぼコの字の断面形状を有し側壁18に固定された左右一対のカバーケース30によりそれぞれ覆われている。左右一対のカバーケース30は、水平状態で上下に併設された上板32および下板34と、上板32および下板34の外端縁を連結する外壁板36と、をそれぞれ有している。左右一対のカバーケース30は、それぞれ上板32および下板34が炉体14の側壁18に固定されることにより炉体14に固定されている。この左右一対のカバーケース30内はそれぞれ気密となっており、カバーケース30内には軸受部材38がそれぞれ下板34から上方に向かって立設された支柱40により支持されている。 The through hole 18a formed in the side wall 18 of the furnace body 14 and the both shaft end portions 24 of the transport roller 22 protruding outside the side wall 18 of the furnace body 14 are for suppressing leakage of atmospheric gas in the furnace body 16. It has a substantially U-shaped cross section and is covered with a pair of left and right cover cases 30 fixed to the side wall 18. The pair of left and right cover cases 30 have an upper plate 32 and a lower plate 34 which are vertically arranged vertically, and an outer wall plate 36 which connects the outer end edges of the upper plate 32 and the lower plate 34, respectively. .. The pair of left and right cover cases 30 are fixed to the furnace body 14 by fixing the upper plate 32 and the lower plate 34 to the side wall 18 of the furnace body 14, respectively. The inside of the pair of left and right cover cases 30 is airtight, and the bearing members 38 are supported in the cover case 30 by the columns 40 erected upward from the lower plate 34, respectively.

図2は、右側の搬送ローラ支持装置10を拡大して説明する図である。左右の搬送ローラ支持装置10は、支柱40により支持された軸受部材38と、軸受部材38に嵌め付けられた一対の転がり軸受60,62と、雰囲気ガス供給装置として機能する転がり軸受冷却管70と、をそれぞれ備えている。側壁18から突き出されている搬送ローラ22の両軸端部24は、それぞれ支持軸44により支持されている。具体的には、搬送ローラ22はアルミナ等のセラミックス製で円筒状となっており、その円筒状の両軸端部24の開口内に例えば鋼鉄製の支持軸44の内側端部44aが支持軸44の回転中心線C1方向へ移動可能にそれぞれ嵌め込まれている。この支持軸44がそれぞれ一対の転がり軸受60,62を介して回転可能に軸受部材38により支持されることにより、搬送ローラ22が搬送ローラ支持装置10により回転可能に支持されている。 FIG. 2 is an enlarged view for explaining the transport roller support device 10 on the right side. The left and right transfer roller support devices 10 include a bearing member 38 supported by a support column 40, a pair of rolling bearings 60 and 62 fitted to the bearing member 38, and a rolling bearing cooling pipe 70 that functions as an atmospheric gas supply device. , Are provided respectively. Both shaft end portions 24 of the transport roller 22 protruding from the side wall 18 are supported by support shafts 44, respectively. Specifically, the transport roller 22 is made of ceramics such as alumina and has a cylindrical shape, and the inner end portion 44a of the steel support shaft 44, for example, is a support shaft in the opening of the cylindrical both shaft end portions 24. The 44 rotation center lines are fitted so as to be movable in the C1 direction. The support shaft 44 is rotatably supported by the bearing member 38 via a pair of rolling bearings 60 and 62, respectively, so that the transfer roller 22 is rotatably supported by the transfer roller support device 10.

図1および図2に示すように、右側の支持軸44の外側端部44bには、スプロケットホイール48が嵌め着けられており、スプロケットホイール48にはチェーン50が巻き掛けられている。チェーン50は、スプロケットホイール48の下側に噛み合わされるとともに、ローラ駆動伝達機52の駆動スプロケットホイール54に巻き掛けられている。チェーン50の下方には軸受部材38に固定されたチェーンレール58が設けられている。これにより、ローラ駆動伝達機52からの回転がチェーン50を介して支持軸44に伝達されて搬送ローラ22が回転し被熱処理物が搬送される。 As shown in FIGS. 1 and 2, a sprocket wheel 48 is fitted to the outer end portion 44b of the right support shaft 44, and a chain 50 is wound around the sprocket wheel 48. The chain 50 is meshed with the lower side of the sprocket wheel 48 and is wound around the drive sprocket wheel 54 of the roller drive transmitter 52. A chain rail 58 fixed to the bearing member 38 is provided below the chain 50. As a result, the rotation from the roller drive transmitter 52 is transmitted to the support shaft 44 via the chain 50, the transfer roller 22 rotates, and the object to be heat-treated is conveyed.

左右の搬送ローラ支持装置10において、支持軸44を支持する一対の転がり軸受60,62、すなわち炉体14側に設けられた第1軸受60および炉体14の反対側に設けられた第2軸受62は、シール付転がり軸受である。図2に示すように、第1軸受60は、外輪60a、内輪60b、外輪60aと内輪60bとの間の転動体60c、および、シール部材60dから構成されている。同様に、第2軸受62は、外輪62a、内輪62b、外輪62aと内輪62bとの間の転動体62c、および、シール部材62dから構成されている。第1軸受60および第2軸受62は、支持軸44に備えられた円環状のカラー66を挟み、支持軸44を安定的に支持するために、支持軸44の回転中心線C1方向に所定の間隔を隔てて軸受部材38内に嵌め入れられている。 In the left and right transfer roller support devices 10, a pair of rolling bearings 60 and 62 that support the support shaft 44, that is, a first bearing 60 provided on the furnace body 14 side and a second bearing provided on the opposite side of the furnace body 14. Reference numeral 62 denotes a rolling bearing with a seal. As shown in FIG. 2, the first bearing 60 is composed of an outer ring 60a, an inner ring 60b, a rolling element 60c between the outer ring 60a and the inner ring 60b, and a seal member 60d. Similarly, the second bearing 62 is composed of an outer ring 62a, an inner ring 62b, a rolling element 62c between the outer ring 62a and the inner ring 62b, and a seal member 62d. The first bearing 60 and the second bearing 62 sandwich an annular collar 66 provided on the support shaft 44, and are predetermined in the direction of the rotation center line C1 of the support shaft 44 in order to stably support the support shaft 44. It is fitted in the bearing member 38 at intervals.

図3は右側の搬送ローラ支持装置10を図2の右側から視た側面図である。図3において、スプロケットホイール48とシール部材60d,62dは省略されている。左右の搬送ローラ支持装置10における第1軸受60および第2軸受62は、軸受部材38に外輪60a,62aが嵌め付けられ、支持軸44に内輪60b,62bが嵌め入れられている。また、第1軸受60における外輪60aの炉体14側および第2軸受62における外輪62aの炉体14と反対側には図3に示すようなレモン形状に形成されたピン68が外輪62aの外周面に形成された環状溝に嵌められ、左右の搬送ローラ支持装置10において、軸受部材38から第1軸受60および第2軸受62が外れないようになっている。 FIG. 3 is a side view of the transport roller support device 10 on the right side as viewed from the right side of FIG. In FIG. 3, the sprocket wheel 48 and the seal members 60d and 62d are omitted. In the first bearing 60 and the second bearing 62 in the left and right transfer roller support devices 10, the outer rings 60a and 62a are fitted to the bearing member 38, and the inner rings 60b and 62b are fitted to the support shaft 44. Further, on the side of the outer ring 60a of the first bearing 60 on the furnace body 14 side and on the side of the second bearing 62 opposite to the furnace body 14 of the outer ring 62a, a pin 68 formed in a lemon shape as shown in FIG. 3 is provided on the outer periphery of the outer ring 62a. It is fitted in an annular groove formed on the surface so that the first bearing 60 and the second bearing 62 do not come off from the bearing member 38 in the left and right transfer roller support devices 10.

図2に示すように、炉体14に設けられた左右のカバーケース30内にそれぞれ設けられた転がり軸受冷却管70は、冷却用雰囲気ガス供給源72から例えば窒素ガス等の雰囲気ガスを第1軸受60および第2軸受62に直接供給する。具体的には、軸受部材38の上面には、第1軸受60および第2軸受62の間の空間E1まで貫通する冷却穴38aが設けられており、転がり軸受冷却管70の出口が冷却穴38aと連通されることにより、冷却用雰囲気ガス供給源72からの、炉室16内の高温となった雰囲気ガスよりも十分に温度の低い雰囲気ガスが第1軸受60および第2軸受62の間の空間E1に直接供給される。 As shown in FIG. 2, the rolling bearing cooling pipes 70 provided in the left and right cover cases 30 provided in the furnace body 14 first receive an atmospheric gas such as nitrogen gas from the cooling atmospheric gas supply source 72. It is directly supplied to the bearing 60 and the second bearing 62. Specifically, a cooling hole 38a that penetrates to the space E1 between the first bearing 60 and the second bearing 62 is provided on the upper surface of the bearing member 38, and the outlet of the rolling bearing cooling pipe 70 is a cooling hole 38a. The atmospheric gas from the cooling atmospheric gas supply source 72, which is sufficiently lower in temperature than the hot atmospheric gas in the furnace chamber 16, is between the first bearing 60 and the second bearing 62. It is supplied directly to space E1.

第1軸受60の内輪60bおよび第2軸受62の内輪62bはそれぞれ支持軸44にすきま嵌めされており、空間E1に供給された雰囲気ガスは、内輪60bと支持軸44とのすきま、又は、内輪62bと支持軸44とのすきまを通りカバーケース30内に放出される。カバーケース30内の雰囲気ガスの排出は、側壁18の貫通穴18aと搬送ローラ22との間のすきまを通って炉室16内に入り、後述する排気管78から排出される。 The inner ring 60b of the first bearing 60 and the inner ring 62b of the second bearing 62 are respectively fitted in the support shaft 44, and the atmospheric gas supplied to the space E1 is the gap between the inner ring 60b and the support shaft 44, or the inner ring. It is discharged into the cover case 30 through the gap between 62b and the support shaft 44. The exhaust of the atmospheric gas in the cover case 30 enters the furnace chamber 16 through the gap between the through hole 18a of the side wall 18 and the transport roller 22, and is discharged from the exhaust pipe 78 described later.

図1に戻り、炉体14の下部には図示しない炉室内雰囲気ガス供給源からの例えば窒素ガス等の雰囲気ガスを炉室16に供給するための分岐ボックス74に接続された供給孔76が設けられ、炉体14の上部には炉室16の雰囲気ガスを排気するための排気管78が設けられている。また、炉室16の上部には、雰囲気ガス採取管80および上部熱電対82が設けられ、炉室16の下部には下部熱電対84が設けられている。これにより、炉室16内の温度や雰囲気ガスの濃度が測定されて、炉室16内の温度や冷却用雰囲気ガス供給源72および炉室内雰囲気ガス供給源からの雰囲気ガスの供給等が制御される。 Returning to FIG. 1, a supply hole 76 connected to a branch box 74 for supplying an atmospheric gas such as nitrogen gas from a furnace chamber atmospheric gas supply source (not shown) to the furnace chamber 16 is provided in the lower part of the furnace body 14. An exhaust pipe 78 for exhausting the atmospheric gas of the furnace chamber 16 is provided in the upper part of the furnace body 14. Further, an atmospheric gas sampling pipe 80 and an upper thermocouple 82 are provided in the upper part of the furnace chamber 16, and a lower thermocouple 84 is provided in the lower part of the furnace chamber 16. As a result, the temperature in the furnace chamber 16 and the concentration of the atmospheric gas are measured, and the temperature in the furnace chamber 16 and the supply of the atmospheric gas from the cooling atmospheric gas supply source 72 and the furnace chamber atmospheric gas supply source are controlled. To.

従来の雰囲気加熱炉では、搬送ローラを通すための貫通穴から炉室16内の高温の雰囲気ガスがカバーケース内に漏出するため、搬送ローラを回転可能に支持する転がり軸受が高温となり易かった。このため、特に炉体側の軸受内のシール部材やグリスが早期に劣化して耐久性が損なわれるので、軸受の交換作業を頻繁に行なう必要があるという問題があった。 In the conventional atmosphere heating furnace, the high temperature atmospheric gas in the furnace chamber 16 leaks into the cover case from the through hole for passing the transfer roller, so that the rolling bearing that rotatably supports the transfer roller tends to become hot. For this reason, in particular, the sealing member and grease in the bearing on the furnace body side deteriorate at an early stage and the durability is impaired, so that there is a problem that the bearing needs to be replaced frequently.

本実施例の搬送ローラ支持装置10によれば、管通路状の炉室16を有する炉体14と、炉体14の側壁18に形成された複数個の貫通穴18aを通して互いに平行な状態で炉体14の長手方向に配設された複数本の円筒状の搬送ローラ22とを備え、複数本の搬送ローラ22上の被加熱物を炉体14内で搬送しつつ雰囲気ガス中で熱処理を施す雰囲気加熱炉12において、炉体14に設けられた気密なカバーケース30により覆われた状態で炉体14の側壁18に沿って配置され、炉体14の側壁18に形成された貫通穴18aから突き出す搬送ローラ22の軸端部24にそれぞれ嵌め入れられて搬送ローラ22を支持する支持軸44を一対の転がり軸受60,62を介して回転可能に支持する軸受部材38を、有する雰囲気加熱炉用搬送ローラ支持装置10であって、一対の転がり軸受60,62は、支持軸44の回転中心線C1方向に間隔を隔てて軸受部材38に嵌め着けられ、冷却用雰囲気ガス供給源72からの雰囲気ガスを、一対の転がり軸受60,62のうちの少なくとも一方の転がり軸受に直接供給する転がり軸受冷却管(雰囲気ガス供給装置)70を、備えている。このため、側壁18に固定されたカバーケース30内において、一対の転がり軸受60,62のうちの少なくとも一方の転がり軸受に雰囲気ガスが直接供給されるので、支持軸44を回転可能に支持する一対の転がり軸受60,62の耐久性が高められる。 According to the transfer roller support device 10 of this embodiment, the furnace body 14 having the furnace chamber 16 in the shape of a pipe passage and the furnace in a state parallel to each other through a plurality of through holes 18a formed in the side wall 18 of the furnace body 14. A plurality of cylindrical transport rollers 22 arranged in the longitudinal direction of the body 14 are provided, and heat treatment is performed in an atmospheric gas while transporting the objects to be heated on the plurality of transport rollers 22 in the furnace body 14. In the atmosphere heating furnace 12, the through hole 18a is arranged along the side wall 18 of the furnace body 14 in a state of being covered by the airtight cover case 30 provided in the furnace body 14 and is formed in the side wall 18 of the furnace body 14. For an atmosphere heating furnace having a bearing member 38 that rotatably supports a support shaft 44 that is fitted into a shaft end portion 24 of a protruding transfer roller 22 and supports the transfer roller 22 via a pair of rolling bearings 60 and 62. In the transport roller support device 10, the pair of rolling bearings 60 and 62 are fitted to the bearing member 38 at intervals in the direction of the rotation center line C1 of the support shaft 44, and the atmosphere from the cooling atmosphere gas supply source 72. A rolling bearing cooling pipe (atmospheric gas supply device) 70 that directly supplies gas to at least one of the pair of rolling bearings 60 and 62 is provided. Therefore, in the cover case 30 fixed to the side wall 18, the atmospheric gas is directly supplied to at least one of the pair of rolling bearings 60 and 62, so that the pair of rotatably supporting the support shaft 44 is supported. The durability of the rolling bearings 60 and 62 is enhanced.

また、本実施例の搬送ローラ支持装置10によれば、転がり軸受冷却管70は、軸受部材38に嵌め着けられた一対の転がり軸受60,62の間の空間E1に、雰囲気ガスを直接供給するものである。このようにすれば、一対の転がり軸受60,62および支持軸44が効率よく冷却されるので、支持軸44を回転可能に支持する一対の転がり軸受60,62の耐久性が高められる。 Further, according to the transfer roller support device 10 of the present embodiment, the rolling bearing cooling pipe 70 directly supplies the atmospheric gas to the space E1 between the pair of rolling bearings 60 and 62 fitted to the bearing member 38. It is a thing. By doing so, the pair of rolling bearings 60 and 62 and the support shaft 44 are efficiently cooled, so that the durability of the pair of rolling bearings 60 and 62 that rotatably support the support shaft 44 is enhanced.

また、本実施例の搬送ローラ支持装置10によれば、一対の転がり軸受60,62の内輪60b,62bは支持軸44に対してすきま嵌めされ、一対の転がり軸受60,62の内輪60b,62bと支持軸44との間で雰囲気ガスの通過が許容されている。このことから、一対の転がり軸受60,62の間の空間E1に供給された雰囲気ガスの通過により、一対の転がり軸受60,62および支持軸44が一層効率よく冷却されるので、支持軸44を回転可能に支持する一対の転がり軸受60,62の耐久性が一層高められる。 Further, according to the transport roller support device 10 of the present embodiment, the inner rings 60b and 62b of the pair of rolling bearings 60 and 62 are clearance-fitted to the support shaft 44, and the inner rings 60b and 62b of the pair of rolling bearings 60 and 62 are fitted. Atmospheric gas is allowed to pass between the and the support shaft 44. From this, the pair of rolling bearings 60 and 62 and the support shaft 44 are cooled more efficiently by the passage of the atmospheric gas supplied to the space E1 between the pair of rolling bearings 60 and 62, so that the support shaft 44 can be used. The durability of the pair of rolling bearings 60 and 62 that are rotatably supported is further enhanced.

続いて、本発明の他の実施例を図面に基づいて詳細に説明する。以下の説明において、実施例相互に共通する部分については同一の符号を付してその説明を省略する。 Subsequently, another embodiment of the present invention will be described in detail with reference to the drawings. In the following description, parts common to each other in the examples are designated by the same reference numerals and the description thereof will be omitted.

図4は、本実施例の搬送ローラ支持装置110を拡大して説明する図であり、図5は図4の搬送ローラ支持装置110を右側から視た側面図である。炉体14に設けられた左右のカバーケース30内には、転がり軸受冷却管(雰囲気ガス供給装置)170がそれぞれ設けられて、軸受部材38の上面にねじ止めされた支持板184により支持されている。転がり軸受冷却管170には、破線の矢印で示すように軸受部材38に嵌め着けられた第2軸受62に向かって、冷却用雰囲気ガス供給源72からの雰囲気ガスを直接噴射する噴射孔170aが設けられている。 FIG. 4 is an enlarged view for explaining the transfer roller support device 110 of this embodiment, and FIG. 5 is a side view of the transfer roller support device 110 of FIG. 4 as viewed from the right side. Rolling bearing cooling pipes (atmospheric gas supply devices) 170 are provided in the left and right cover cases 30 provided in the furnace body 14, and are supported by support plates 184 screwed to the upper surface of the bearing member 38. There is. The rolling bearing cooling pipe 170 has an injection hole 170a that directly injects the atmospheric gas from the cooling atmospheric gas supply source 72 toward the second bearing 62 fitted to the bearing member 38 as shown by the broken line arrow. It is provided.

上述のように本実施例の搬送ローラ支持装置110によれば、転がり軸受冷却管(雰囲気ガス供給装置)170は、軸受部材38に嵌め着けられた一対の転がり軸受60,62のうちの一方の転がり軸受である第2軸受62に対して、雰囲気ガスを直接噴射する。このことから、第2軸受62、第2軸受62の内輪62bが嵌め付けられた支持軸44、および支持軸44を介して他方の転がり軸受である第1軸受60が雰囲気ガスにより冷却されるので、支持軸44を回転可能に支持する一対の転がり軸受60,62の耐久性が高められる。 As described above, according to the transport roller support device 110 of the present embodiment, the rolling bearing cooling pipe (atmosphere gas supply device) 170 is one of a pair of rolling bearings 60 and 62 fitted to the bearing member 38. Atmospheric gas is directly injected into the second bearing 62, which is a rolling bearing. From this, the first bearing 60, which is the other rolling bearing, is cooled by the atmospheric gas via the second bearing 62, the support shaft 44 to which the inner ring 62b of the second bearing 62 is fitted, and the support shaft 44. The durability of the pair of rolling bearings 60 and 62 that rotatably support the support shaft 44 is enhanced.

図6は、本実施例の搬送ローラ支持装置210を拡大して説明する図である。炉体14に設けられた左右のカバーケース30内には、雰囲気ガス供給装置として機能する転がり軸受冷却管270がそれぞれ設けられている。転がり軸受冷却管270には、破線の矢印で示すように軸受部材38に嵌め着けられた一対の転がり軸受60,62のうちの炉体14側の第1軸受60に向かって、冷却用雰囲気ガス供給源72からの雰囲気ガスを直接噴射する噴射孔270aが設けられている。 FIG. 6 is an enlarged view for explaining the transfer roller support device 210 of this embodiment. Rolling bearing cooling pipes 270 that function as atmospheric gas supply devices are provided in the left and right cover cases 30 provided in the furnace body 14, respectively. In the rolling bearing cooling pipe 270, as shown by the broken line arrow, the cooling atmosphere gas is directed toward the first bearing 60 on the furnace body 14 side of the pair of rolling bearings 60 and 62 fitted to the bearing member 38. An injection hole 270a for directly injecting atmospheric gas from the supply source 72 is provided.

上述のように本実施例の搬送ローラ支持装置210によれば、転がり軸受冷却管(雰囲気ガス供給装置)270は、軸受部材38に嵌め着けられた一対の転がり軸受60,62のうちの炉体14側の第1軸受60に対して、雰囲気ガスを噴射する。このことから、炉体14側の第1軸受60、第1軸受60の内輪60bが嵌め付けられた支持軸44、および支持軸44を介して反対側の第2軸受62が雰囲気ガスにより冷却される。炉体14からの熱を受け易い炉体14側の第1軸受60に対して雰囲気ガスが直接噴射されるので、一層、一対の転がり軸受60,62の耐久性が高められる。 As described above, according to the transport roller support device 210 of the present embodiment, the rolling bearing cooling pipe (atmospheric gas supply device) 270 is a furnace body of a pair of rolling bearings 60 and 62 fitted to the bearing member 38. Atmospheric gas is injected into the first bearing 60 on the 14th side. From this, the first bearing 60 on the furnace body 14 side, the support shaft 44 to which the inner ring 60b of the first bearing 60 is fitted, and the second bearing 62 on the opposite side are cooled by the atmospheric gas via the support shaft 44. To. Since the atmospheric gas is directly injected onto the first bearing 60 on the furnace body 14 side, which is susceptible to heat from the furnace body 14, the durability of the pair of rolling bearings 60 and 62 is further enhanced.

以上、本発明を図面を参照して詳細に説明したが、本発明はその他の態様においても適用される。 Although the present invention has been described in detail with reference to the drawings, the present invention is also applicable to other aspects.

たとえば、上述の実施例では、雰囲気ガスは炉室内雰囲気ガス供給源とは別の冷却用雰囲気ガス供給源72から転がり軸受冷却管70,170,270に雰囲気ガスが供給されていたが、同一の雰囲気ガス供給源から供給孔76および転がり軸受冷却管(雰囲気ガス供給装置)70,170,270に雰囲気ガスが供給されてもよい。また、第1軸受60および第2軸受62の温度上昇を抑制するために、例えば、カバーケース30内の気圧が炉室16内の気圧よりも高くなるように雰囲気ガスの供給が制御されてもよい。 For example, in the above-described embodiment, the atmospheric gas is supplied to the rolling bearing cooling pipes 70, 170, and 270 from a cooling atmospheric gas supply source 72 different from the furnace chamber atmospheric gas supply source, but they are the same. Atmospheric gas may be supplied from the atmospheric gas supply source to the supply holes 76 and the rolling bearing cooling pipes (atmospheric gas supply device) 70, 170, 270. Further, in order to suppress the temperature rise of the first bearing 60 and the second bearing 62, for example, even if the supply of atmospheric gas is controlled so that the atmospheric pressure in the cover case 30 is higher than the atmospheric pressure in the furnace chamber 16. Good.

また、上述の実施例では、第1軸受60および第2軸受62はシール付軸受であったが、雰囲気ガスの通気性を確保するためにシール部材無しの軸受が用いられてもよい。また、実施例1では、冷却のための雰囲気ガスが支持軸44の外周を通って抜けるように第1軸受60の内輪60bおよび第2軸受62の内輪62bが支持軸44にすきま嵌めされていたが、代わりに第1軸受60の外輪60aおよび第2軸受62の外輪62aがすきま嵌めされていてもよい。また、例えば、実施例1においてシール部材60dおよびシール部材62dを無くすことで雰囲気ガスの通気性を確保し、内輪60bおよび内輪62bをしまり嵌めとしてもよい。また、実施例2および実施例3においては、外輪60a,62aと内輪60b,62bとの両方がすきま嵌めでなく締まり嵌めであってもよい。 Further, in the above-described embodiment, the first bearing 60 and the second bearing 62 are bearings with a seal, but bearings without a seal member may be used in order to ensure the air permeability of the atmospheric gas. Further, in the first embodiment, the inner ring 60b of the first bearing 60 and the inner ring 62b of the second bearing 62 are clearance-fitted to the support shaft 44 so that the atmospheric gas for cooling escapes through the outer periphery of the support shaft 44. However, instead, the outer ring 60a of the first bearing 60 and the outer ring 62a of the second bearing 62 may be clearance-fitted. Further, for example, in the first embodiment, the seal member 60d and the seal member 62d may be eliminated to ensure the air permeability of the atmospheric gas, and the inner ring 60b and the inner ring 62b may be tightly fitted. Further, in the second and third embodiments, both the outer rings 60a and 62a and the inner rings 60b and 62b may be tightly fitted instead of clearance fitted.

また、上述の実施例では、支持軸44を回転可能に支持する軸受部材38はカバーケース30内に設けられていたが、炉体14内に設けられていてもよい。 Further, in the above-described embodiment, the bearing member 38 that rotatably supports the support shaft 44 is provided in the cover case 30, but may be provided in the furnace body 14.

また、上述の実施例では、支持軸44を支持するために第1軸受60および第2軸受62が用いられていたが、単一の転がり軸受が用いられていてもよい。 Further, in the above-described embodiment, the first bearing 60 and the second bearing 62 are used to support the support shaft 44, but a single rolling bearing may be used.

なお、上述したのはあくまでも本発明の一実施例であり、本発明はその主旨を逸脱しない範囲で種々変更を加え得るものである。 It should be noted that the above description is merely an embodiment of the present invention, and the present invention can be modified in various ways without departing from the spirit of the present invention.

10,110,210:搬送ローラ支持装置(雰囲気加熱炉用搬送ローラ支持装置)
12:雰囲気加熱炉
14:炉体
16:炉室
18:側壁
18a:貫通穴
22:搬送ローラ
24:軸端部
30:カバーケース
38:軸受部材
44:支持軸
60:第1軸受(転がり軸受)
60b:内輪
62:第2軸受(転がり軸受)
62b:内輪
70,170,270:転がり軸受冷却管(雰囲気ガス供給装置)
72:冷却用雰囲気ガス供給源(雰囲気ガス供給源)
C1:回転中心線
E1:空間
10, 110, 210: Conveying roller support device (conveying roller support device for atmospheric heating furnace)
12: Atmospheric heating furnace 14: Furnace body 16: Furnace chamber 18: Side wall 18a: Through hole 22: Transfer roller 24: Shaft end 30: Cover case 38: Bearing member 44: Support shaft 60: First bearing (rolling bearing)
60b: Inner ring 62: Second bearing (rolling bearing)
62b: Inner ring 70, 170, 270: Rolling bearing cooling pipe (atmospheric gas supply device)
72: Atmospheric gas supply source for cooling (atmospheric gas supply source)
C1: Rotation center line E1: Space

Claims (1)

管通路状の炉室を有する炉体と、互いに平行な状態で前記炉体の長手方向に配設された複数本の円筒状の搬送ローラとを備え、前記複数本の搬送ローラ上の被加熱物を前記炉体内で搬送しつつ雰囲気ガス中で熱処理を施す雰囲気加熱炉において、前記搬送ローラの軸端部にそれぞれ嵌め入れられて前記搬送ローラを支持する支持軸を転がり軸受を介して回転可能に支持する軸受部材を、有する雰囲気加熱炉用搬送ローラ支持装置であって、
前記転がり軸受は、前記支持軸の回転中心線方向に所定の間隔を隔てて前記軸受部材に嵌め着けられ、
雰囲気ガス供給源からの雰囲気ガスを、前記転がり軸受に直接供給する雰囲気ガス供給装置を、備え、
前記複数本の搬送ローラの軸端部は、前記炉体の側壁に形成された複数個の貫通穴から突き出し、
前記軸受部材は、前記炉体に設けられた気密なカバーケースにより覆われた状態で前記炉体の側壁に沿って配置され、
前記転がり軸受は、一対の転がり軸受であり、前記雰囲気ガス供給装置は、前記一対の転がり軸受のうちの少なくとも一方に前記雰囲気ガスを直接供給するものであり、
前記雰囲気ガス供給装置は、前記軸受部材に嵌め着けられた前記一対の転がり軸受の間の空間に、前記雰囲気ガス供給源からの雰囲気ガスを直接供給するものであり、
前記一対の転がり軸受の内輪は前記支持軸に対してすきま嵌めされ、前記一対の転がり軸受の内輪と前記支持軸との間で前記雰囲気ガス供給源からの雰囲気ガスの通過が許容されている
ことを特徴とする雰囲気加熱炉用搬送ローラ支持装置。
A furnace body having a furnace chamber in the shape of a pipe passage and a plurality of cylindrical transfer rollers arranged in the longitudinal direction of the furnace body in a state parallel to each other are provided, and the heating is performed on the plurality of transfer rollers. In an atmosphere heating furnace in which an object is transported in the furnace and heat-treated in an atmosphere gas, the support shafts that are fitted into the shaft ends of the transport rollers and support the transport rollers can be rotated via rolling bearings. A transport roller support device for an atmosphere heating furnace, which has a bearing member that supports the bearing member.
The rolling bearing is fitted to the bearing member at a predetermined interval in the direction of the rotation center line of the support shaft.
An atmospheric gas from the atmosphere gas supply source, the rolling bearing ambient gas supply apparatus for supplying directly to, e Bei,
The shaft ends of the plurality of transfer rollers protrude from the plurality of through holes formed in the side walls of the furnace body.
The bearing member is arranged along the side wall of the furnace body in a state of being covered by an airtight cover case provided on the furnace body.
The rolling bearing is a pair of rolling bearings, and the atmospheric gas supply device directly supplies the atmospheric gas to at least one of the pair of rolling bearings.
The atmospheric gas supply device directly supplies the atmospheric gas from the atmospheric gas supply source to the space between the pair of rolling bearings fitted to the bearing member.
The inner ring of the pair of rolling bearings is clearance-fitted with respect to the support shaft, and the passage of atmospheric gas from the atmospheric gas supply source is permitted between the inner ring of the pair of rolling bearings and the support shaft. A transport roller support device for atmospheric heating furnaces.
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Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0464559U (en) * 1990-10-11 1992-06-03
JPH05331557A (en) * 1992-05-28 1993-12-14 Nkk Corp Strip passing roll in continuously treating equipment for metal strip
JPH06185876A (en) * 1992-12-16 1994-07-08 Kawasaki Heavy Ind Ltd Air-tight structure for rotating roller of vacuum processing furnace
JPH09217127A (en) * 1996-02-15 1997-08-19 Nippon Steel Corp Device for controlling thermal crown
JP2005140205A (en) * 2003-11-05 2005-06-02 Nsk Ltd Sealed rolling bearing
JP2010043816A (en) * 2008-08-18 2010-02-25 Noritake Co Ltd Transporting roller supporting device for heating furnace
JP2014511988A (en) * 2011-03-25 2014-05-19 シュヴァルツ,エーファ Roller hearth furnace and method for heating a workpiece
JP2014215033A (en) * 2013-04-24 2014-11-17 日本碍子株式会社 Heat treatment method and heat treatment apparatus

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0464559U (en) * 1990-10-11 1992-06-03
JPH05331557A (en) * 1992-05-28 1993-12-14 Nkk Corp Strip passing roll in continuously treating equipment for metal strip
JPH06185876A (en) * 1992-12-16 1994-07-08 Kawasaki Heavy Ind Ltd Air-tight structure for rotating roller of vacuum processing furnace
JPH09217127A (en) * 1996-02-15 1997-08-19 Nippon Steel Corp Device for controlling thermal crown
JP2005140205A (en) * 2003-11-05 2005-06-02 Nsk Ltd Sealed rolling bearing
JP2010043816A (en) * 2008-08-18 2010-02-25 Noritake Co Ltd Transporting roller supporting device for heating furnace
JP2014511988A (en) * 2011-03-25 2014-05-19 シュヴァルツ,エーファ Roller hearth furnace and method for heating a workpiece
JP2014215033A (en) * 2013-04-24 2014-11-17 日本碍子株式会社 Heat treatment method and heat treatment apparatus

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