JPS61189853A - Conveying roller - Google Patents

Abstract

PURPOSE:To provide a roller which improves impact resistance in a roller fitted externally with ceramic rolls to a water cooled driving shaft made of a metal by forming an air layer between the above-mentioned shaft and the roll and interposing a metallic body having an impact relieving function therebetween. CONSTITUTION:A large-diameter part of a detaining projection 11 is formed to one end side of the hollow driving shaft 1 made of steel penetrated with a hollow part 13 to serve as a passage for cooling water at the axial center and an external screw part 12 is formed on the other side in, for example, a conveying roller for a heat treatment installation of a pipe or bar material. The plural ceramic rolls 21 are externally fitted onto the shaft 1. Two pieces a set of the rolls 21 are pressed to each other in the truncated heat parts to constitute a conveying part. The inside diameter of the rolls 21 is made larger than the outside diameter of the shaft 1 and the metallic body 7 is interposed between both. A spacer 3 is held in place between the projection 11 and the roll group 2 and the roll group 2 is tightened while a roll retainer 4 and a coil spring 6 are sandwiched between the roll group and a nut 5 to fix the roll group 2 to the shaft 1. The metallic body 7 is made of a stainless steel woven wire net to form the air layer and has the impact relieving function.

Description

【発明の詳細な説明】 〈産業上の利用分野〉 この発明は耐熱性、耐衝撃性に優れた搬送ローラに関す
る。DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a conveyance roller having excellent heat resistance and impact resistance.

〈従来の技術〉 高温雰囲気中に長時間曝らされる、あるいは高温材料に
直接接触するロールは高度の耐熱性を要求されるため、
耐熱性に優れた金属ロールが用い。<Prior art> Rolls that are exposed to high-temperature atmospheres for long periods of time or come into direct contact with high-temperature materials are required to have a high degree of heat resistance.
Uses metal rolls with excellent heat resistance.

られるのが通例である。しかるに金属ロールはロール面
の摩耗、亀裂の発生等が避けられないため、寿命が短い
ばかりでなく、ロールの交換あるいはロール面の再研磨
を行ったとしても多大な時間と労力を要し、コストが嵩
むという問題がある。かかる金属ロールの寿命を延ばす
ために、耐熱性、耐摩耗性に優れたセラミックスロール
の使用が考えられるが、セフミック７はそれ自体が脆性
的な挙動をとる材料であるため、単一体として用いると
靭性に劣シ衝撃に弱いという強度上の問題が生じる。そ
こで最近この欠点を補うべく、ロールの駆動軸として靭
性にすぐれた金属（例えば鋼）を水冷して用い、この水
冷駆動軸の外周にセラミックスロールを外嵌して用いる
という技術が行われるようになってきた。しかるに、鋼
製水冷駆動軸にセラミックスロールを外嵌したロールに
は次の゛ような問題がある。It is customary that However, since metal rolls inevitably suffer from wear and cracks on the roll surface, not only do they have a short lifespan, but even if the roll is replaced or the roll surface is re-polished, it requires a great deal of time and effort, resulting in high costs. There is a problem that the amount increases. In order to extend the life of such metal rolls, it is possible to use ceramic rolls with excellent heat resistance and wear resistance, but since Cefmic 7 itself is a material that behaves brittlely, it is difficult to use it as a single body. A strength problem arises in that it has poor toughness and is weak against impact. Recently, in order to compensate for this drawback, a technology has been developed in which a metal with excellent toughness (such as steel) is water-cooled as the drive shaft of the roll, and a ceramic roll is fitted around the outer periphery of this water-cooled drive shaft. It has become. However, a roll in which a ceramic roll is fitted onto a steel water-cooled drive shaft has the following problems.

〈発明が解決しようとする問題点〉 ■　セラミックスロールと水冷駆動軸を密接嵌合して高
温環境で使用すると、セラミックスロールの外面は高温
になるのに対し、駆動軸は水冷のために比較的低温に保
持され、これに接するセラミックスロールの内面は低温
となるので、ロールの内面と外面と温度差が大きくなっ
て熱応力が大となり、ロールの破損に至るという問題が
ある。<Problems to be solved by the invention> ■ When a ceramic roll and a water-cooled drive shaft are closely fitted and used in a high-temperature environment, the outer surface of the ceramic roll becomes hot, whereas the drive shaft is relatively hot due to water cooling. Since the ceramic roll is kept at a low temperature and the inner surface of the ceramic roll in contact with the ceramic roll is at a low temperature, there is a large temperature difference between the inner and outer surfaces of the roll, resulting in large thermal stress, which can lead to breakage of the roll.

■　セラミックスと駆動軸を構成する鋼とでは熱膨張率
が異なる（セフミックスは鋼の桶程度である）ため、高
温時では駆動軸の熱膨張によってセラミックスロールに
過大な引張応力が作用し、ローｌの破損に発展するとい
う問題がある。■ Ceramics and the steel that makes up the drive shaft have different coefficients of thermal expansion (Cefmix is about the same as a steel bucket), so at high temperatures, excessive tensile stress acts on the ceramic roll due to the thermal expansion of the drive shaft, causing the roll to deteriorate. There is a problem that this may lead to damage to the l.

これらの問題に対し、セラミックスロー゛μト水冷駆動
軸との間に冷却水等の熱伝導性物質を介在させて接解界
面の抜熱を行い、高温時におけるセラミックスロールと
水冷駆動軸との膨張量の差をちぢめてセラミックロール
に過大の引張応力がかかるのを回避させるという提案が
ある（特開昭５８−１９６１５４）。To solve these problems, heat is removed from the fused interface by interposing a thermally conductive material such as cooling water between the ceramic roll and the water-cooled drive shaft. There is a proposal to reduce the difference in the amount of expansion to avoid excessive tensile stress being applied to the ceramic roll (Japanese Patent Laid-Open No. 58-196154).

しかしこの提案は、前述の問題点■を解消するには有効
な手段であるが、問題点■の解消は不可能であるばかシ
か、接触界面の抜熱に上ってロールの内面と外面との温
度差は逆に大となるという新たな問題を生じる。また接
触界面に冷却水等を介在させて抜熱することは、省エネ
ルギ一対策上から好ましくないという問題もある。However, although this proposal is an effective means to solve the above-mentioned problem (1), it is either impossible to solve the problem (2), or the heat is removed from the contact interface and the inner and outer surfaces of the roll are heated. A new problem arises in that the temperature difference between the Further, there is a problem in that it is not preferable to dissipate heat by interposing cooling water or the like at the contact interface from the viewpoint of energy saving.

本発明は叙上の問題点を全て解消しようとするもので、
ロール内外面の温度差による熱応力と、ロール−駆動軸
の熱膨張率の差による引張応力の双方を緩和するととも
に、搬送材料がロールに接触する際の物理的衝撃の緩和
を図って、多角的に耐衝撃性の向上を図った搬送ローフ
の提供を目的とする。The present invention attempts to solve all the problems mentioned above.
In addition to alleviating both the thermal stress caused by the temperature difference between the inner and outer surfaces of the roll and the tensile stress caused by the difference in the coefficient of thermal expansion between the roll and the drive shaft, the multi-angle The purpose of the present invention is to provide a transportation loaf with improved impact resistance.

く問題を解決するための手段〉 本発明の搬送ローラは、中空の水冷駆動軸とその外側の
セラミックスロールとの間に、空気層を形成しかつ衝撃
緩和機能を有する金属体を介在せしめた点に特徴がある
。Means for Solving the Problems> The conveyance roller of the present invention has the following features: A metal body that forms an air layer and has a shock-reducing function is interposed between the hollow water-cooled drive shaft and the ceramic roll on the outside thereof. There are characteristics.

すなわち本発明の搬送ローラにおいては、上記金属体の
空気層による断熱効果のため、ロールの内面と外面との
温度差が可及的に低減して、ロールに作用する熱応力の
減少を図るとともに、ロールと駆動軸との密接嵌合が金
属体の介在にょシ回避され、両者の熱膨張率の違いによ
シ生じるひずみが金属体の衝撃緩和機能によシ吸収され
てセラミックスロールに発生する引張応力を低減し、し
かも金属体のもつ衝撃緩和機能は、搬送される材料がロ
ールに接触する際の物理的衝撃をも緩和するのであ、る
。That is, in the conveying roller of the present invention, due to the heat insulating effect of the air layer of the metal body, the temperature difference between the inner and outer surfaces of the roll is reduced as much as possible, and the thermal stress acting on the roll is reduced. The close fit between the roll and the drive shaft is avoided by the interposition of the metal body, and the strain caused by the difference in thermal expansion coefficient between the two is absorbed by the impact mitigation function of the metal body and generated in the ceramic roll. In addition to reducing tensile stress, the impact-reducing function of the metal body also reduces the physical impact when the material being conveyed comes into contact with the rolls.

〈実施例〉 以下、図面に掲げる実施例に基づいて本発明の詳細な説
明する。<Examples> The present invention will be described in detail below based on examples shown in the drawings.

第１図は、管棒材の熱処理設備用の搬送ローラに本発明
を適用した一例の説明図で、要部を断面図で示しである
。FIG. 1 is an explanatory diagram of an example in which the present invention is applied to a conveyance roller for a heat treatment facility for tube and bar materials, and shows a main part in a sectional view.

図において、（１）は鋼製の中空駆動軸であシ、その軸
心中央を貫通して冷却水の通路となる中空部α場が設け
である。中空軸（１）の一端側には、係止突起部αのと
しての大径部が形成されておシ、他側には雄ねじ部（２
）が形成されている。In the figure, (1) is a hollow drive shaft made of steel, and a hollow α field is provided that passes through the center of the shaft center and serves as a passage for cooling water. A large diameter portion serving as a locking protrusion α is formed on one end of the hollow shaft (1), and a male threaded portion (2) is formed on the other side.
) is formed.

（２１は上記中空軸（１）に外嵌されたセラミックスロ
ール群で、中空の截頭円錐形状のセラミックスローｓｒ
２’ｒ）ｓ個から成っている。このロー／Ｌ／＠ηは２
個１組として管棒材を搬送すべく截頭部同志を互いに当
接させて管棒材の搬送部とし、８組が軸の長手方向に並
設される。ローμ中空部の内径は、前記中空軸（１）の
外径よシ大径にしである。これは後述の金属体（７）を
中空軸（１）とロー／ｌ１ｌ）との間に介在させるため
である。(21 is a group of ceramic rolls fitted onto the hollow shaft (1), which is a hollow truncated conical ceramic roll sr.
It consists of 2'r)s pieces. This low/L/@η is 2
The truncated heads are brought into contact with each other in order to convey the tube and bar materials as a set, forming a conveyance section for the tube and bar materials, and eight sets are arranged in parallel in the longitudinal direction of the shaft. The inner diameter of the low μ hollow portion is larger than the outer diameter of the hollow shaft (1). This is because a metal body (7), which will be described later, is interposed between the hollow shaft (1) and the row/l1l).

（５）は中空軸（１）に形成された雄ねじ部（６）に螺
合するセラミックスロール固定用のナツトであって、係
止突起部αυとセラミックスロール群（２１との間にス
ペーサー（３）ｔ−ハサみ、セラミックスロー／Ｉ’　
群（２３とナツト（５）との間にロールおさえ（４）お
よびコイル。(5) is a nut for fixing the ceramic roll that is screwed into the male threaded part (6) formed on the hollow shaft (1), and is provided with a spacer (3) between the locking protrusion αυ and the ceramic roll group (21). ) T-Hasami, Ceramic Throw/I'
Roll presser (4) and coil between group (23 and nut (5)).

バネ（６）をはさんだ状態で締付けられてセラミックス
ロール群（２１を中空軸（１）に固定する。スペーサー
（３）およびロールおさえ（４）はセラミックスロー）
ｖＱυと同じ内径を有する７ランジ付の中空金属円筒で
ある。コイルバネ（５）は後述の金属体（７）のもつ衝
撃緩和機能を阻害しないためと、セラミックスロールｆ
２．υの軸方向の熱膨張を吸収するためのものである。The ceramic roll group (21 is fixed to the hollow shaft (1) by being tightened with the spring (6) in between. The spacer (3) and roll presser (4) are ceramic rolls)
It is a hollow metal cylinder with 7 flange having the same inner diameter as vQυ. The coil spring (5) is used in order not to interfere with the shock-reducing function of the metal body (7), which will be described later, and also because the ceramic roll f
2. This is to absorb the thermal expansion in the axial direction of υ.

中空軸（１）とロールＱ］）との間に介在する金属体（
７）は、この例ではステンレス鋼製の織金網（以下ステ
ンレス鋼網という）を中空軸（１）に巻付けたものとな
っている。ステンレス鋼網の巻付後の外径は前述のロー
／Ｉ／儲り、スペーサー（３）、ロールおさえ（４）の
内径と略々一致する。ステンレス鋼網を巻付ける範囲は
、本発明の目的を達成するためにはロール群（２）の軸
長方向の長さ分だけで十分であるが、実施例の如くスペ
ーサー（３）、ロールおさえ（４）と中空軸（１）との
間にもステンレス鋼網を介在させれば、これらの組立時
の調芯作業が容易となる。The metal body (
In this example, 7) is a stainless steel woven wire mesh (hereinafter referred to as stainless steel mesh) wound around the hollow shaft (1). The outer diameter of the stainless steel net after winding approximately coincides with the inner diameter of the above-mentioned row/I/wall, spacer (3), and roll presser (4). In order to achieve the purpose of the present invention, it is sufficient to wrap the stainless steel net around the length of the roll group (2) in the axial direction. If a stainless steel mesh is also interposed between (4) and the hollow shaft (1), alignment work during assembly will be facilitated.

このステンレス鋼網は、後記の実施効果試験ではＪ工５
−Ｇ８５５５に規定されるＦＷ−Ｓ８０４（線径１！ｍ
、５メツシュ）を２重巻きにして使用しているが、一般
的には線径０．２〜２藺の５〜１０メツシユの範囲のも
のが適当であシ、また巻付は回数については断熱効果を
持たせるには１回でもよいが衝撃緩和機能を高めるには
２回以上が望ましい。This stainless steel net was
-FW-S804 specified in G8555 (wire diameter 1!m
, 5 mesh) is used in double winding, but generally a wire diameter of 0.2 to 2 mesh and a range of 5 to 10 mesh is suitable, and the number of windings is limited. It may be applied once in order to provide a heat insulating effect, but it is desirable to apply it twice or more in order to enhance the shock-reducing function.

また空気層を形成しかつ衝撃緩和機能を有する金属体及
びその取付方法としては、上記ステンレス鋼網を巻き付
ける他に、例えばステンレス鋼製針金をジグザグに折曲
したものを巻き付けたシ、ステンレス鋼製針金を螺旋状
に巻き付ける方法等がある。Metal bodies that form an air layer and have a shock-reducing function and their attachment methods include, in addition to wrapping the stainless steel net described above, for example, wrapping a stainless steel wire bent in a zigzag pattern; There are methods such as winding the wire in a spiral.

これら金属体の材料仕様もステンレス鋼網の仕様に準じ
て決定すればよい。The material specifications of these metal bodies may also be determined in accordance with the specifications of the stainless steel mesh.

なお、実施例では金属体の素材としてステンレス鋼を使
用しているが、これはステンレス鋼が耐熱性に優れ、か
つ発錆が少なく、本発明の実施の場合の金属体の素材と
して好適なためであるが、これ以外の金属であってもよ
いことはいうまで本ない。In the examples, stainless steel is used as the material for the metal body, but this is because stainless steel has excellent heat resistance and less rusting, and is suitable as a material for the metal body in the case of implementing the present invention. However, it goes without saying that other metals may also be used.

次に作用効果について説明する。Next, the effects will be explained.

以上の如く構成した本発明の搬送ローフを高温雰囲気中
で使用すると、炉内雰囲気温度によジロー／Ｌ／（財）
の外面が加熱されて炉内雰囲気温度近くまで上昇する。When the conveyance loaf of the present invention constructed as described above is used in a high-temperature atmosphere, the temperature of the furnace atmosphere changes.
The outer surface of the reactor is heated and the temperature rises to near the ambient temperature inside the furnace.

そしてこの熱はロー／ｌ／＆］）の内部を伝わシ内面に
至るが、ロー／Ｌ／＠１）の内面に接している金属体の
空気層の断熱効果によって軸（１）側への熱伝達が遮断
される。この熱伝達の遮断によってロー／Ｌ／２υと外
面と内面との温度差は従来よシ著しく小さくなる。This heat is then transmitted through the inside of the RO/L/&]) and reaches the inner surface of the shaft (1), but due to the heat insulating effect of the air layer of the metal body that is in contact with the inner surface of the RO/L/@1), it is transferred to the shaft (1) side. Heat transfer is blocked. By blocking this heat transfer, the temperature difference between Rho/L/2υ and the outer surface and inner surface becomes significantly smaller than in the past.

また金属体の介在によシロールと駆動軸との密接嵌合が
回避され、駆動軸の熱膨張によシロールにもたらされる
ひずみが衝撃緩和機能を持つ金属体に吸収されて、ロー
ルに発生する引張応力が緩和される。In addition, the interposition of the metal body prevents a tight fit between the roll and the drive shaft, and the strain caused to the roll due to the thermal expansion of the drive shaft is absorbed by the metal body, which has a shock-reducing function, resulting in tension generated in the roll. Stress is relieved.

一方、軸（１）の外面温度も、前記金属体の断熱作用に
より上昇が抑制される。On the other hand, the temperature of the outer surface of the shaft (1) is also suppressed from increasing due to the heat insulating effect of the metal body.

更に、搬送される材料がロー）ｖ０２］）に当接する際
にロー１ｖ１２υが受ける衝撃も、前記金属体の衝撃緩
和機能すなわちクッションの作用によシ緩和される。Furthermore, the impact received by the row 1v12v when the material to be conveyed comes into contact with the row)v02]) is also alleviated by the impact-reducing function of the metal body, that is, the cushioning action.

更にまたロール群（２）は軸長方向に熱、膨張するが、
この膨張量はコイルバネ（６）の弾発機能によって吸収
され、上記したロールに発生する引張応力の緩和作用と
あいまって、ロールが一層効果的に保護される。Furthermore, the roll group (2) heats and expands in the axial direction,
This amount of expansion is absorbed by the elastic function of the coil spring (6), and together with the above-mentioned action of alleviating the tensile stress generated in the roll, the roll is protected even more effectively.

第２図はオーステナイトステンレス鋼管の連続熱処理時
において、炬内温度を１２５０℃に設定し、第１図に示
した中空軸（１）の中空部（至）に８０℃の冷却水を通
した時の中空軸およびセラミックスロールの温度分布を
特性曲線Ｐ（実線）で示した図である。また比較のため
、セラミックスロールと金属体分だけ大径とした中空軸
とを密接嵌合せしめた従来の搬送ローラについての結果
を特性曲線Ｑ（破線）で示した。炬内温度、冷却水の温
度等の条件は本発明の場合と同一である。Figure 2 shows the temperature during continuous heat treatment of austenitic stainless steel pipes, when the temperature inside the kettle was set at 1250°C and cooling water at 80°C was passed through the hollow part (toward) of the hollow shaft (1) shown in Figure 1. FIG. 3 is a diagram showing the temperature distribution of the hollow shaft and the ceramic roll by a characteristic curve P (solid line). For comparison, a characteristic curve Q (broken line) shows the results for a conventional conveying roller in which a ceramic roll and a hollow shaft whose diameter was increased by the size of the metal body were closely fitted. Conditions such as the temperature inside the kettle and the temperature of the cooling water are the same as in the present invention.

図に見る通シ、本発明搬送ローラにおいては、金属体（
７）の効果が顕著に発揮されて比較例に較べてセラミッ
クスロールの内面と外面の温度差が大巾に低減されたこ
とが判る。As shown in the figure, in the conveyance roller of the present invention, the metal body (
It can be seen that the effect 7) was significantly exhibited and the temperature difference between the inner and outer surfaces of the ceramic roll was significantly reduced compared to the comparative example.

〈発明の効果〉 本発明の効果をまとめると次の通りとなる。<Effect of the invention> The effects of the present invention can be summarized as follows.

■　セラミックスロールと中空駆動軸との間に空気層を
形成しかつ衝撃緩和機能を有する金属体を介在させるこ
とによシ次の（イ）〜（へ）の効果が得られる。(2) By forming an air layer between the ceramic roll and the hollow drive shaft and interposing a metal body having a shock-reducing function, the following effects (a) to (f) can be obtained.

（イ）ロールの外面と内面との温度差が小さくなること
によって熱応力が著しく減少し、ロールの破損が防止さ
れる。(a) By reducing the temperature difference between the outer and inner surfaces of the roll, thermal stress is significantly reduced and damage to the roll is prevented.

幹）　ロールと駆動軸とが密接嵌合しなくなるので、両
部に発生する熱膨張量の違いによる応力の干渉が回避さ
れロール破損が防止される。Since the roll and drive shaft are no longer tightly fitted, stress interference due to the difference in the amount of thermal expansion generated in both parts is avoided, and roll breakage is prevented.

（ハ）搬送される材料がロールに当接する際の衝撃が緩
和される。(c) The impact when the transported material comes into contact with the rolls is alleviated.

に）駆動軸側の温度上昇を防止することができるので、
軸の曲シを防止できる。2) It is possible to prevent the temperature rise on the drive shaft side.
Can prevent shaft bending.

（ホ）金属体をステンレス鋼網等とした場合は、金属体
のかわシに例えば砂などを使用した場合に較べて、ロー
ル組立時のロールと中空軸との芯出しが容易である。(E) When the metal body is made of stainless steel net or the like, it is easier to center the roll and the hollow shaft when assembling the roll, compared to when sand or the like is used as the shield for the metal body.

（へ）ロールと軸との圓に断熱層を有しているので、こ
の部分での不必要な抜熱がなく、省エネルギーの効果も
ある。(f) Since there is a heat insulating layer around the circle of the roll and shaft, there is no unnecessary heat removal in this area, and there is also an energy saving effect.

■　また、実施例に示したように、ロールを側方からコ
イルバネを介して水冷駆動軸に締結すれば、次の（ト）
〜（す）の効果が得られる。■ Also, as shown in the example, if the roll is fastened to the water-cooled drive shaft from the side via a coil spring, the following (t) can be achieved.
~(su) effects can be obtained.

（ト）　　ロールとその軸との固定手段についてはキー
着あるいは凸部と凹部のはめ合せ（特開昭５９−２１４
１５号公報）等が知られているが、上記締結によれば、
ロールや軸に特殊な形状の加工が不要となシ、加工コス
トが下がる。(g) As for the means of fixing the roll and its shaft, a key ring or fitting of a convex part and a concave part (Japanese Patent Laid-Open No. 59-214
15) etc., but according to the above conclusion,
There is no need to process special shapes on rolls or shafts, reducing processing costs.

（ト）　ロールに応力が集中する部分がないので、この
部分を起点とする破損を防止できる。(g) Since there is no part of the roll where stress is concentrated, damage starting from this part can be prevented.

（す）　　ロールの軸長方向の熱膨張量がコイルバネに
よシ吸収され、他への影響がなくなる。(S) The amount of thermal expansion in the axial direction of the roll is absorbed by the coil spring, eliminating any effects on other parts.

このように、本発明の搬送ロールはセフミックスの耐衝
撃性に弱いという欠点を多方面から効果的に解消し、耐
熱性、耐摩耗性にすぐれたセラミックス特有の性質を十
分に発揮せしめ、高温算囲気中で使用しても、また高温
材料と直接接触させても問題、のない高度の耐火性を保
有するものである。In this way, the conveyor roll of the present invention effectively eliminates the disadvantage of Cefmix's weak impact resistance from many aspects, fully demonstrates the unique properties of ceramics, which have excellent heat resistance and abrasion resistance, and can withstand high temperatures. It has a high degree of fire resistance that causes no problems even when used in ambient air or in direct contact with high-temperature materials.

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は本発明の搬送ローラの一実施例を示す説明図、
第２図は本発明例または比較例の搬送ローラを用いて管
棒材の熱処理を行った場合の搬送ローラ各部の温度分布
を示した図である。 １：中空駆動軸、１１：係止突起部、１２：雄ねじ部、
１３：中空部、２：セラミックスロー２群、２１：セラ
ミックスロール、８ニスペーサ−１４：ロールおさえ、
５：ナツト、６：コイルバネ、７：金属体FIG. 1 is an explanatory diagram showing an embodiment of the conveyance roller of the present invention,
FIG. 2 is a diagram showing the temperature distribution at each part of the conveyance roller when a pipe rod material is heat-treated using the conveyance roller of the present invention example or the comparative example. 1: Hollow drive shaft, 11: Locking projection, 12: Male thread,
13: Hollow part, 2: 2 groups of ceramic throws, 21: Ceramics roll, 8 varnish spacer - 14: Roll presser,
5: Nut, 6: Coil spring, 7: Metal body

Claims (3)

【特許請求の範囲】[Claims] （１）中空の水冷駆動軸とその外側のセラミックスロー
ルとの間に、空気層を形成しかつ衝撃緩和機能を有する
金属体を介在せしめたことを特徴とする搬送ローラ。(1) A conveyance roller characterized in that a metal body that forms an air layer and has a shock-reducing function is interposed between a hollow water-cooled drive shaft and a ceramic roll on the outside thereof. （２）空気層を形成しかつ衝撃緩和機能を有する金属体
がステンレス鋼製織金網であることを特徴とする特許請
求の範囲第１項記載の搬送ローラ。(2) The conveyance roller according to claim 1, wherein the metal body that forms an air layer and has a shock-reducing function is a stainless steel woven wire mesh. （３）セラミックスロールが側方よりコイルバネを介し
て水冷駆動軸に締結されていることを特徴とする特許請
求の範囲第１項または第２項記載の搬送ローラ。(3) The conveyance roller according to claim 1 or 2, wherein the ceramic roll is laterally fastened to a water-cooled drive shaft via a coil spring.