JPH0823368B2 - Fixing method and structure of segment screw piece - Google Patents
Fixing method and structure of segment screw pieceInfo
- Publication number
- JPH0823368B2 JPH0823368B2 JP31022992A JP31022992A JPH0823368B2 JP H0823368 B2 JPH0823368 B2 JP H0823368B2 JP 31022992 A JP31022992 A JP 31022992A JP 31022992 A JP31022992 A JP 31022992A JP H0823368 B2 JPH0823368 B2 JP H0823368B2
- Authority
- JP
- Japan
- Prior art keywords
- ring
- screw
- screw piece
- shaft
- shaped
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Landscapes
- Lining Or Joining Of Plastics Or The Like (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、セグメントスクリュピ
ースの固定方法及び構造に関し、特に、温度変化に拘わ
らず常に確実なスクリュピースの固定を得るための新規
な改良に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and a structure for fixing a segment screw piece, and more particularly to a new improvement for obtaining a reliable screw piece fixing regardless of temperature change.
【０００２】[0002]
【従来の技術】従来、用いられていたこの種のセグメン
トスクリュピースの固定構造としては、一般に、図４か
ら図６で示す構成が採用されていた。すなわち、図４か
ら図６において符号１で示されるものは長手形状でかつ
断面が非円形状をなす軸であり、この軸１の外周には、
輪状の複数のスクリュピース２ａ〜２ｄが直列状に嵌入
して設けられている。2. Description of the Related Art Conventionally, the structure shown in FIGS. 4 to 6 has been adopted as a fixing structure for this kind of segment screw piece which has been conventionally used. That is, what is denoted by reference numeral 1 in FIGS. 4 to 6 is a shaft having a longitudinal shape and a non-circular cross section, and the outer circumference of the shaft 1 is
A plurality of ring-shaped screw pieces 2a to 2d are provided by being fitted in series.
【０００３】前記各スクリュピース２ａ〜２ｄのうち、
初段のスクリュピース２ａは、前記軸１のフランジ状の
軸径部３に対して第１リング４を介して押圧されてお
り、最後段のスクリュピース２ｄの後端２ｄａは、前記
軸１のねじ部１ａに螺合されたナット５により押圧され
ることにより、各スクリュピース２ａ〜２ｄが軸１に押
圧・固定されている。Of the above screw pieces 2a to 2d,
The first-stage screw piece 2a is pressed against the flange-shaped shaft diameter portion 3 of the shaft 1 via a first ring 4, and the rear end 2da of the last-stage screw piece 2d is a screw of the shaft 1. The screw pieces 2a to 2d are pressed and fixed to the shaft 1 by being pressed by the nut 5 screwed to the portion 1a.
【０００４】[0004]
【発明が解決しようとする課題】従来のセグメントスク
リュピースの固定構造は、以上のように構成されていた
ため、次のような課題が存在していた。すなわち、従来
の固定構造では、例えば、２００〜３００℃の加熱状態
にあるシリンダの中に、常温のセグメントスクリュ組立
体を挿入した場合、スクリュピースにシリンダの熱が伝
達し、セグメントスクリュ組立体が昇温する事になる
が、昇温過程においてスクリュピースの方が軸より先行
して温度上昇し、スクリュピースと軸に温度差が生じる
事で、熱膨張差が生じることになる。従って、スクリュ
ピースを固定しているナットに軸方向の強い力が作用
し、各スクリュピースは圧縮応力、軸は引張応力が生じ
ることになる。その結果として、スクリュ組立体を構成
している各部品に弾性限度を越える応力が生じ、永久変
形を起こし、ナットの緩みや、破損と云う致命的な事例
が発生している。また、押出機の運転において、混練の
発熱を抑える目的で軸心に細穴を形成して冷却水を通す
スクリュ冷却方式を採用したこともあるが、混練による
発熱で温度が上がっている各スクリュピースの内部に位
置する軸に冷却水を通すことにより、スクリュピース軸
に、前述した以上の温度差が生じ、前述より大きい応力
が外部に生じる。そのため、特にＬ／Ｄ（長さ対径比）
の短い軸の場合は、熱膨張差の吸収量が少なく軸の応力
集中部が破断することになっていた。Since the conventional fixing structure of the segment screw piece is constructed as described above, the following problems exist. That is, in the conventional fixing structure, for example, when the segment screw assembly at room temperature is inserted into the cylinder in a heated state of 200 to 300 ° C., the heat of the cylinder is transferred to the screw piece and the segment screw assembly is Although the temperature rises, the temperature of the screw piece rises in advance of the shaft during the temperature rise process, and a difference in temperature between the screw piece and the shaft causes a difference in thermal expansion. Therefore, a strong axial force acts on the nut fixing the screw piece, and a compressive stress is generated on each screw piece and a tensile stress is generated on the shaft. As a result, stress exceeding the elastic limit is generated in each component constituting the screw assembly, permanent deformation is caused, and fatal cases such as loosening and damage of the nut occur. In addition, in the operation of the extruder, there was a case where a screw cooling method was used in which a small hole was formed in the shaft center and cooling water was passed in order to suppress the heat generated by kneading. By passing the cooling water through the shaft located inside the piece, the temperature difference above the screw piece shaft is generated, and the stress larger than the above is generated outside. Therefore, especially L / D (length to diameter ratio)
In the case of a shaft having a short length, the amount of absorption of the difference in thermal expansion was small, and the stress concentrated portion of the shaft was to be broken.
【０００５】本発明は以上のような課題を解決するため
になされたもので、特に、温度変化に拘わらず常に確実
なスクリュピースの固定を得るようにしたセグメントス
クリュピースの固定構造を提供することを目的とする。The present invention has been made in order to solve the above problems, and in particular, provides a fixing structure for segment screw pieces which always ensures reliable fixing of screw pieces regardless of temperature change. With the goal.
【０００６】[0006]
【課題を解決するための手段】本発明によるセグメント
スクリュピースの固定方法は、軸の外周に設けられた輪
状の複数のスクリュピースを、複数の輪状弾性体を介し
てナットにより押圧・固定する方法である。A method of fixing a segment screw piece according to the present invention is a method of pressing and fixing a plurality of ring-shaped screw pieces provided on the outer periphery of a shaft with nuts through a plurality of ring-shaped elastic bodies. Is.
【０００７】また、本発明によるセグメントスクリュピ
ースの固定構造は、軸の外周に設けられた輪状の複数の
スクリュピースをナットにより押圧・固定するようにし
たセグメントスクリュピースの固定構造において、前記
スクリュピースとナットとの間に設けられた複数の輪状
弾性体を有する構成である。The segment screw piece fixing structure according to the present invention is a segment screw piece fixing structure in which a plurality of ring-shaped screw pieces provided on the outer periphery of a shaft are pressed and fixed by nuts. And a plurality of ring-shaped elastic bodies provided between the nut and the nut.
【０００８】さらに詳細には、前記輪状弾性体は皿ばね
よりなる構成である。More specifically, the ring-shaped elastic body is composed of a disc spring.
【０００９】[0009]
【作用】本発明によるセグメントスクリュピースの固定
方法及び構造においては、各スクリュピースと軸との温
度差により生じた熱膨張差は、スクリュピースとナット
との間に設けられた複数の輪状弾性体で吸収され、スク
リュピースを常に適正な荷重でスラスト方向に押圧し、
それにより、スクリュ組立体を構成しているスクリュピ
ース及び軸の熱膨張差による応力が許容応力を越えない
ようにして各スクリュピースの固定を確実に保持するこ
とができる。In the method and structure for fixing a segment screw piece according to the present invention, the difference in thermal expansion caused by the temperature difference between each screw piece and the shaft is caused by a plurality of ring-shaped elastic bodies provided between the screw piece and the nut. Is absorbed by, and the screw piece is always pressed in the thrust direction with an appropriate load,
As a result, the stress due to the difference in thermal expansion between the screw pieces and the shaft that make up the screw assembly does not exceed the allowable stress, and the screw pieces can be held securely.
【００１０】[0010]
【実施例】以下、図面と共に本発明によるセグメントス
クリュピースの固定方法及び構造の好適な実施例につい
て詳細に説明する。なお、従来例と同一又は同等部分に
は同一符号を付して説明する。図１から図３迄は本発明
によるセグメントスクリュピースの固定構造を示すもの
で、図１は全体構成を示す断面図、図２は図１の横断面
図、図３は図１の要部の拡大断面図である。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of a method and structure for fixing a segment screw piece according to the present invention will be described in detail below with reference to the drawings. It should be noted that the same or equivalent parts as those of the conventional example are designated by the same reference numerals for description. 1 to 3 show a fixing structure of a segment screw piece according to the present invention. FIG. 1 is a sectional view showing the entire structure, FIG. 2 is a transverse sectional view of FIG. 1, and FIG. 3 is a main part of FIG. It is an expanded sectional view.
【００１１】図１から図３において符号１で示されるも
のは長手形状でかつ断面が非円形状をなす軸であり、こ
の軸１のスクリュピース挿入部１ｂの外周には、輪状の
複数のセグメント形のスクリュピース２ａ〜２ｄが直列
状に嵌入して設けられている。A reference numeral 1 in FIGS. 1 to 3 is a shaft having a long shape and a non-circular cross section, and a plurality of ring-shaped segments are provided on the outer periphery of the screw piece insertion portion 1b of the shaft 1. Shaped screw pieces 2a to 2d are provided by being fitted in series.
【００１２】前記スクリュピース２ａ〜２ｄのうち、初
段のスクリュピース２ａは前記軸１のフランジ状の軸径
部３に対して第１リング４を介して押圧されており、最
後段のスクリュピース２ｄの後端２ｄａには、第２リン
グ２０が当接すると共に、前記軸１のねじ部１ａには、
筒状カバー部５ａを有するナット５が螺合して設けられ
ている。Of the screw pieces 2a to 2d, the screw piece 2a at the first stage is pressed against the flange-shaped shaft diameter portion 3 of the shaft 1 through the first ring 4, and the screw piece 2d at the last stage. The second ring 20 contacts the rear end 2da, and the threaded portion 1a of the shaft 1 is
A nut 5 having a tubular cover portion 5a is provided by screwing.
【００１３】前記第２リング２０が設けられた前記軸１
の輪状体装着部１ｃの外周には、輪状をなす複数の皿ば
ねからなる輪状弾性体２１が軸方向に積層された状態で
設けられており、このナット５をねじ込むことにより、
各輪状弾性体２１及び第２リング２０を介して各スクリ
ュピース２ａ〜２ｄの押圧・固定が達成されている。The shaft 1 provided with the second ring 20.
On the outer periphery of the ring-shaped body mounting portion 1c, a ring-shaped elastic body 21 composed of a plurality of ring-shaped disc springs is provided in a state of being laminated in the axial direction, and by screwing this nut 5,
The screw pieces 2a to 2d are pressed and fixed via the ring-shaped elastic bodies 21 and the second ring 20.
【００１４】なお、前記輪状体装着部１ｃの径は前記ス
クリュピース挿入部１ｂの径よりも小に構成され、前記
ねじ部１ａの径は前記輪状体装着部１ｃの径よりも小と
なるように各々構成されている。The diameter of the ring-shaped body mounting portion 1c is smaller than the diameter of the screw piece insertion portion 1b, and the diameter of the screw portion 1a is smaller than the diameter of the ring-shaped body mounting portion 1c. Are configured in each.
【００１５】次に、各スクリュピース２ａ〜２ｄを軸１
に実際に装着する方法について述べる。まず、押出条件
に合致した形状の複数のセグメント形のスクリュピース
２ａ〜２ｄをスクリュピース挿入部１ｂに挿入し、次に
複数の輪状体２１を積層状にして輪状体装着部１ｃに装
着する。Next, each of the screw pieces 2a to 2d is attached to the shaft 1.
The actual mounting method is described in. First, a plurality of segment-shaped screw pieces 2a to 2d having a shape conforming to the extrusion conditions are inserted into the screw piece insertion portion 1b, and then a plurality of ring-shaped bodies 21 are laminated and mounted on the ring-shaped body mounting portion 1c.
【００１６】その後、ナット５をねじ部１ａに螺合させ
ると、筒状カバー部５ａが各輪状弾性体２１の外周に接
合しつつ第２リング２０の外周部２０ａに接合するた
め、各輪状弾性体２１はこの筒状カバー部５ａの内側に
保持される。After that, when the nut 5 is screwed into the threaded portion 1a, the tubular cover portion 5a is joined to the outer peripheral portion 20a of the second ring 20 while being joined to the outer peripheral portion of each annular elastic body 21, so that each annular elastic member is joined. The body 21 is held inside the tubular cover portion 5a.
【００１７】前述の状態で、ナット５をねじ込み、輪状
体装着部１ｃのねじ端面１ｃＡにナット５の内端５ｂが
当接すると、この状態で各輪状弾性体２１は所定量圧縮
され、各スクリュピース２ａ〜２ｄは軸方向に所定の荷
重で押圧されて固定される。In the above-mentioned state, the nut 5 is screwed in, and when the inner end 5b of the nut 5 comes into contact with the screw end surface 1cA of the ring-shaped body mounting portion 1c, each ring-shaped elastic body 21 is compressed by a predetermined amount in this state, and each screw is screwed. The pieces 2a to 2d are pressed and fixed in the axial direction with a predetermined load.
【００１８】また、前記第２リング２０を設けているこ
とにより、各輪状弾性体２１の押圧力がスクリュピース
２ｄの端面に一様にかかるようにしていると共に、前記
筒状カバー部５ａとこの第２リング２０によって各輪状
弾性体２１が覆われているため、この各輪状部２１側に
は押出時の押出物等が入り込まないようになされてい
る。Further, since the second ring 20 is provided, the pressing force of each ring-shaped elastic body 21 is evenly applied to the end surface of the screw piece 2d, and the cylindrical cover portion 5a and the cylindrical cover portion 5a are provided. Since each ring-shaped elastic body 21 is covered with the second ring 20, extrudates and the like during extrusion do not enter the ring-shaped portion 21 side.
【００１９】なお、各輪状体２１の圧縮量は、図示して
いないが、二個のナット５を用いたダブルナットで制限
してもよい。また、各輪状弾性体２１の数量と大きさ
は、組立完了時でスクリュピース２１と軸１との温度差
による熱膨張差を吸収し、適正なスクリュピース押し付
け力と各輪状弾性体２１の応力を許容する許容応力範囲
内で設定するものである。なお、前述の輪状弾性体２１
は皿ばねの場合について述べたが、皿ばねに限ることな
く、例えば、弾性を有する硬質ゴム体等を用いることも
できる。The compression amount of each ring-shaped member 21 may be limited by a double nut using two nuts 5, although not shown. Further, the quantity and size of each ring-shaped elastic body 21 absorbs the difference in thermal expansion due to the temperature difference between the screw piece 21 and the shaft 1 at the time of completion of assembly, and the appropriate screw piece pressing force and stress of each ring-shaped elastic body 21 are absorbed. Is set within the allowable stress range that allows The ring-shaped elastic body 21 described above is used.
Although the case of the disc spring has been described, the present invention is not limited to the disc spring, and for example, a hard rubber body having elasticity can be used.
【００２０】[0020]
【発明の効果】本発明によるセグメントスクリュピース
の固定方法及び構造は、以上のように構成されているた
め、次のような効果を得ることができる。すなわち、ス
クリュピースと軸との熱膨張差を輪状弾性体が吸収する
ため、常に適正な荷重でスクリュピースを固定し、合わ
せ面を密着する事ができるため、スクリュピース間に原
料が入る事がない。また、スクリュ組立体の各部品を常
に許容応力範囲内にできるため破損することがない。ま
た、ナットにゆるみが生じないため信頼性を向上でき
る。さらに、スクリュ組立体を昇温後、ナットの増し締
めが不要であり、大幅な省力化を推進することができ
る。Since the segment screw piece fixing method and structure according to the present invention are configured as described above, the following effects can be obtained. That is, since the ring-shaped elastic body absorbs the difference in thermal expansion between the screw piece and the shaft, the screw piece can always be fixed with an appropriate load and the mating surfaces can be brought into close contact with each other. Absent. Further, since each part of the screw assembly can be kept within the allowable stress range at all times, it is not damaged. Further, since the nut is not loosened, the reliability can be improved. Further, after the temperature of the screw assembly is raised, it is not necessary to re-tighten the nut, and it is possible to promote significant labor saving.
【図１】本発明によるセグメントスクリュピースの固定
構造を示す断面図である。FIG. 1 is a sectional view showing a fixing structure of a segment screw piece according to the present invention.
【図２】図１の横断面図である。2 is a cross-sectional view of FIG.
【図３】図１の要部の拡大断面図である。FIG. 3 is an enlarged cross-sectional view of a main part of FIG.
【図４】従来のセグメントスクリュピースの固定構造を
示す断面図である。FIG. 4 is a sectional view showing a conventional fixing structure for a segment screw piece.
【図５】図１の横断面図である。5 is a cross-sectional view of FIG.
【図６】図１の要部の拡大断面図である。6 is an enlarged cross-sectional view of a main part of FIG.
１ 軸 ２ａ〜２ｄ スクリュピース ５ ナット ２１ 輪状弾性体 1 axis 2a-2d screw piece 5 nut 21 ring-shaped elastic body
Claims (3)
スクリュピース(2a〜2d)を、複数の輪状弾性体(21)を介
してナット(5)により押圧・固定することを特徴とする
セグメントスクリュピースの固定方法。1. A method for pressing and fixing a plurality of ring-shaped screw pieces (2a to 2d) provided on the outer periphery of a shaft (1) with a nut (5) through a plurality of ring-shaped elastic bodies (21). The characteristic method of fixing segment screw pieces.
スクリュピース(2a〜2d)をナット(5)により押圧・固定
するようにしたセグメントスクリュピースの固定構造に
おいて、前記スクリュピース（2a〜2d)とナット(5)との
間に設けられた複数の輪状弾性体(21)を有する構成より
なることを特徴とするセグメントスクリュピースの固定
構造。2. A segment screw piece fixing structure in which a plurality of ring-shaped screw pieces (2a to 2d) provided on the outer periphery of a shaft (1) are pressed and fixed by nuts (5). (2a to 2d) and a nut (5) having a plurality of ring-shaped elastic body (21) provided between the structure, the segment screw piece fixing structure.
とを特徴とする請求項２記載のセグメントスクリュピー
スの固定構造。3. The segment screw piece fixing structure according to claim 2, wherein the ring-shaped elastic body (21) is made of a disc spring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31022992A JPH0823368B2 (en) | 1992-11-19 | 1992-11-19 | Fixing method and structure of segment screw piece |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31022992A JPH0823368B2 (en) | 1992-11-19 | 1992-11-19 | Fixing method and structure of segment screw piece |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06159340A JPH06159340A (en) | 1994-06-07 |
| JPH0823368B2 true JPH0823368B2 (en) | 1996-03-06 |
Family
ID=18002747
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP31022992A Expired - Lifetime JPH0823368B2 (en) | 1992-11-19 | 1992-11-19 | Fixing method and structure of segment screw piece |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0823368B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4914229B2 (en) * | 2007-01-25 | 2012-04-11 | ゼン技研株式会社 | Scaffolding wall mounting bolts |
-
1992
- 1992-11-19 JP JP31022992A patent/JPH0823368B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH06159340A (en) | 1994-06-07 |
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