JP2010261483A - Raceway member and motion guide device using the same - Google Patents

Raceway member and motion guide device using the same Download PDF

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JP2010261483A
JP2010261483A JP2009111158A JP2009111158A JP2010261483A JP 2010261483 A JP2010261483 A JP 2010261483A JP 2009111158 A JP2009111158 A JP 2009111158A JP 2009111158 A JP2009111158 A JP 2009111158A JP 2010261483 A JP2010261483 A JP 2010261483A
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Prior art keywords
longitudinal direction
rolling
rolling element
track member
predetermined position
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JP2009111158A
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JP4660601B2 (en
Inventor
Katsuya Iida
勝也 飯田
Takuya Horie
拓也 堀江
Yuuki Hayashi
勇樹 林
Teruaki Ooka
輝明 大岡
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THK Co Ltd
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THK Co Ltd
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Priority to JP2009111158A priority Critical patent/JP4660601B2/en
Priority to PCT/JP2010/056191 priority patent/WO2010125895A1/en
Priority to TW099112509A priority patent/TWI526632B/en
Publication of JP2010261483A publication Critical patent/JP2010261483A/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C29/00—Bearings for parts moving only linearly
    • F16C29/04—Ball or roller bearings
    • F16C29/06—Ball or roller bearings in which the rolling bodies circulate partly without carrying load
    • F16C29/0633—Ball or roller bearings in which the rolling bodies circulate partly without carrying load with a bearing body defining a U-shaped carriage, i.e. surrounding a guide rail or track on three sides
    • F16C29/0635—Ball or roller bearings in which the rolling bodies circulate partly without carrying load with a bearing body defining a U-shaped carriage, i.e. surrounding a guide rail or track on three sides whereby the return paths are provided as bores in a main body of the U-shaped carriage, e.g. the main body of the U-shaped carriage is a single part with end caps provided at each end
    • F16C29/065—Ball or roller bearings in which the rolling bodies circulate partly without carrying load with a bearing body defining a U-shaped carriage, i.e. surrounding a guide rail or track on three sides whereby the return paths are provided as bores in a main body of the U-shaped carriage, e.g. the main body of the U-shaped carriage is a single part with end caps provided at each end with rollers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C29/00—Bearings for parts moving only linearly
    • F16C29/005—Guide rails or tracks for a linear bearing, i.e. adapted for movement of a carriage or bearing body there along
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/58—Raceways; Race rings
    • F16C33/60—Raceways; Race rings divided or split, e.g. comprising two juxtaposed rings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C29/00—Bearings for parts moving only linearly
    • F16C29/08—Arrangements for covering or protecting the ways

Abstract

<P>PROBLEM TO BE SOLVED: To provide a raceway member having a longer product life without damaging an elastic member which seals a lubricant on a joint line between the raceway members even if connecting the raceway members to each other to form a long raceway member, and to provide a motion guide device using the same. <P>SOLUTION: The raceway member has a rolling element rolling surface formed along the longitudinal direction. On the rolling element rolling surface at least at one end of the raceway member in the longitudinal direction, a swollen portion is formed ranging from a predetermined position toward a terminal point on the end face in the longitudinal direction so that its cross section shape along the longitudinal direction is swollen beyond a virtual straight line between the predetermined position and the terminal point. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

本発明は、軌道部材およびこの軌道部材を用いた運動案内装置に関する。   The present invention relates to a track member and a motion guide device using the track member.

軌道部材と、この軌道部材に複数の転動体を介して組み付けられる移動部材とを備えることにより、移動部材が軌道部材の長手方向に沿って相対的に往復運動自在とされる運動案内装置において、軌道部材の長さが一定長以上として使用する場合、従来から、複数の軌道部材の端部同士を連結した軌道部材を形成し、移動部材を案内する運動案内装置が知られている。   In the motion guide device in which the moving member is reciprocally movable along the longitudinal direction of the track member by including the track member and a moving member assembled to the track member via a plurality of rolling elements, 2. Description of the Related Art Conventionally, when a track member is used with a certain length or longer, a motion guide device that forms a track member in which ends of a plurality of track members are connected and guides a moving member is known.

こうした軌道部材およびこの軌道部材を用いた運動案内装置では、軌道部材の継ぎ目に段差が生じることがあり、この段差による転動体の不具合発生を防止することを目的として種々の対策が講じられている。   In such a raceway member and a motion guide device using this raceway member, a step may be formed at the joint of the raceway member, and various measures are taken for the purpose of preventing the rolling element from being caused by this step. .

例えば、下記特許文献１に記載された軌道部材は、湾曲した曲線軌道部材の継ぎ目において、軌道部材の継ぎ目の湾曲の外周側面に位置する転動体転走溝に弦上に削り取ったクラウニング面を形成しているので、スライダが摺動抵抗の変動なく円滑に移動することが可能であると共に、転動体の転走溝が早期に疲労してフレーキング現象を発生するのを防止することにより、長期に亘って使用可能な運動案内装置及びこの運動案内装置に用いられる軌道部材が記載されている。   For example, the track member described in Patent Document 1 below forms a crowning surface that is scraped on a chord in a rolling element rolling groove located on the outer peripheral side surface of the curve of the seam of the track member at the joint of the curved curve track member. Therefore, it is possible to move the slider smoothly without fluctuation of sliding resistance, and to prevent the rolling groove of the rolling element from fatigued early and causing flaking phenomenon. And a track member used in the motion guide device are described.

特開２００４−１８３６８３号公報JP 2004-183683 A

しかしながら、従来の軌道部材及びこの軌道部材を用いた運動案内装置は、クラウニング面や段差量の設定により、転動体の損傷による製品寿命の早期到来を防止することは可能であったが、転動体転走溝を転動する転動体の転動を円滑に行うためにスライダに封入される潤滑油を封止する弾性部材（シールリップ）がクラウニング面や段差の端面に形成された鋭利な角部に衝突することによって、潤滑剤の保持性が低下するという課題があった。   However, the conventional raceway member and the motion guide device using this raceway member can prevent the early arrival of the product life due to the damage of the rolling element by setting the crowning surface and the step amount. Sharp corners where elastic members (seal lips) that seal the lubricating oil sealed in the slider are formed on the crowning surface and the end surface of the step to smoothly roll the rolling elements rolling on the rolling groove There is a problem in that the retention of the lubricant is reduced due to the collision.

本発明は、上記課題を解決するために成されたものであって、軌道部材を連結して軌道部材を形成した場合であっても、軌道部材の継ぎ目に生じる段差による転動体の不具合を防止し、且つシールリップの潤滑剤の保持性が低下することなく、製品寿命の長期化を図ることができる軌道部材及びこの軌道部材を用いた運動案内装置を提供することを目的とする。   The present invention has been made to solve the above-described problems, and prevents a rolling element from being defective due to a step generated at the joint of the track member even when the track member is formed by connecting the track member. In addition, it is an object of the present invention to provide a track member and a motion guide device using the track member that can prolong the life of the product without deteriorating the retention of the lubricant on the seal lip.

上記課題を解決するため、本発明に係る軌道部材は、長手方向に沿って転動体転走面が形成された軌道部材であって、前記軌道部材の長手方向の少なくとも一端部の前記転動体転走面は、前記長手方向に沿った断面形状において、所定位置と長手方向に直交する端面上の端点とを結んだ仮想直線よりも膨出した膨出部を有することを特徴とする。   In order to solve the above problems, a raceway member according to the present invention is a raceway member in which a rolling element rolling surface is formed along a longitudinal direction, and the rolling element rolling of at least one end portion in the longitudinal direction of the raceway member. The running surface has a bulging portion that bulges from an imaginary straight line connecting a predetermined position and an end point on an end surface orthogonal to the longitudinal direction in a cross-sectional shape along the longitudinal direction.

また、上記課題を解決するため、本発明に係る運動案内装置は、長手方向に沿って転動体転走面が形成された軌道部材と、前記転動体転走面を転動する複数の転動体を介して前記軌道部材に沿って移動自在に組み付けられた移動部材とを備え、前記移動部材には、前記移動部材に封入された潤滑剤を所定の変形代をもって封止する弾性部材を備えた運動案内装置であって、前記軌道部材の長手方向の少なくとも一端部の前記転動体転走面は、前記長手方向に沿った断面形状において、所定位置と長手方向に直交する端面上の端点とを結んだ仮想直線よりも膨出した膨出部を有する軌道部材を備えたことを特徴とする。   Moreover, in order to solve the said subject, the exercise | movement guide apparatus which concerns on this invention is the track member in which the rolling-element rolling surface was formed along the longitudinal direction, and the some rolling element which rolls the said rolling-element rolling surface And a movable member assembled in a movable manner along the track member, and the movable member is provided with an elastic member that seals the lubricant enclosed in the movable member with a predetermined deformation allowance. In the motion guide device, the rolling element rolling surface of at least one end in the longitudinal direction of the raceway member has a predetermined position and an end point on the end surface orthogonal to the longitudinal direction in a cross-sectional shape along the longitudinal direction. A track member having a bulging portion that bulges from the connected virtual straight line is provided.

このように、本発明によれば、複数の軌道部材の端部同士を連結させる場合であっても、軌道部材の長手方向の一端部に膨出部を形成しているので、軌道部材の継ぎ目に生じる段差による転動体の不具合を防止し、且つシールリップの潤滑剤の保持性が低下することなく、製品寿命の長期化を図ることができる。   Thus, according to the present invention, even when the ends of the plurality of track members are connected to each other, the bulging portion is formed at one end in the longitudinal direction of the track member. In this way, it is possible to prevent the rolling element from being troubled due to the level difference that occurs in the product and to prolong the product life without reducing the lubricant retention of the seal lip.

本発明に係る軌道部材を説明するための斜視図である。It is a perspective view for demonstrating the track member which concerns on this invention. 図１におけるＡ−Ａ断面図である。It is AA sectional drawing in FIG. 本発明に係る軌道部材を用いた運動案内装置を説明するための斜視図である。It is a perspective view for demonstrating the motion guide apparatus using the track member which concerns on this invention. 本発明に係る運動案内装置の軌道部材の継ぎ目における弾性部材の動きを説明するための図である。It is a figure for demonstrating a motion of the elastic member in the joint of the track member of the movement guide apparatus which concerns on this invention. 本発明に係る運動案内装置の軌道部材の継ぎ目における転動体の動きを説明するための図である。It is a figure for demonstrating the motion of the rolling element in the joint of the track member of the motion guide apparatus which concerns on this invention. 本発明に係る軌道部材の変形例を説明するための断面図である。It is sectional drawing for demonstrating the modification of the track member which concerns on this invention.

以下、本発明に係る軌道部材及びこの軌道部材を用いた運動案内装置について図面を参照しつつ説明する。なお、以下の実施形態は、各請求項に係る発明を限定するものではなく、また、実施形態の中で説明されている特徴の組み合わせの全てが発明の解決手段に必須であるとは限らない。   Hereinafter, a track member and a motion guide device using the track member according to the present invention will be described with reference to the drawings. The following embodiments do not limit the invention according to each claim, and all combinations of features described in the embodiments are not necessarily essential to the solution means of the invention. .

図１は、本実施形態に係る軌道部材を説明するための斜視図であり、図２は、図１におけるＡ−Ａ断面図であり、図３は、本実施形態に係る軌道部材を用いた運動案内装置を説明するための斜視図であり、図４は、本実施形態に係る運動案内装置の軌道部材の継ぎ目における弾性部材の動きを説明するための図であり、図５は、本実施形態に係る運動案内装置の軌道部材の継ぎ目における転動体の動きを説明するための図であり、図６は本実施形態に係る軌道部材の変形例を説明するための断面図である。   FIG. 1 is a perspective view for explaining a track member according to the present embodiment, FIG. 2 is a cross-sectional view taken along line AA in FIG. 1, and FIG. 3 uses the track member according to the present embodiment. FIG. 4 is a perspective view for explaining the motion guide device, FIG. 4 is a diagram for explaining the movement of the elastic member at the joint of the track member of the motion guide device according to the present embodiment, and FIG. It is a figure for demonstrating the motion of the rolling element in the joint of the track member of the movement guide apparatus which concerns on a form, FIG. 6 is sectional drawing for demonstrating the modification of the track member which concerns on this embodiment.

図１に示すように、本実施形態に係る軌道部材１０は、複数の軌道部材１０ａ，１０ａを連結させて長尺の軌道部材１０を形成している。また、軌道部材１０ａは、軌道部材１０ａの上面から下面に穿孔された取付孔１１，１１に締結ボルト等の締結手段を用いて軌道部材を基台等の取付ベースに固定することができる。   As shown in FIG. 1, the track member 10 according to the present embodiment forms a long track member 10 by connecting a plurality of track members 10a, 10a. Further, the track member 10a can fix the track member to a mounting base such as a base using fastening means such as fastening bolts in the mounting holes 11 and 11 drilled from the upper surface to the lower surface of the track member 10a.

軌道部材１０ａは、長手方向に沿って転動体転走面１２が外表面に形成されている。また、本実施形態に係る軌道部材１０ａは、その上面と下面とを繋ぐ両側面に夫々転動体転走溝１２が２条ずつ合計４条形成されている。さらに、図３に示すように、運動案内装置１は、この転動体転走面１２上を複数の転動体３０を介して移動部材２０が長手方向に往復移動自在に組み付けられる。   As for the track member 10a, the rolling-element rolling surface 12 is formed in the outer surface along the longitudinal direction. Further, the raceway member 10a according to the present embodiment has two rolling element rolling grooves 12 formed in total on the both side surfaces connecting the upper surface and the lower surface. Further, as shown in FIG. 3, in the motion guide device 1, the moving member 20 is assembled on the rolling element rolling surface 12 via a plurality of rolling elements 30 so as to be reciprocally movable in the longitudinal direction.

また、各軌道部材１０ａの連結は、隣接する取付孔１１，１１を適当な連結金具などを用いて連結しても構わないし、各軌道部材１０ａ，１０ａの間に気温や湿度等の環境変化による軌道部材１０ａ，１０ａの伸縮を考慮した隙間を介在させて取付ベースに配列固定しても構わない。このように、各軌道部材１０ａ，１０ａの連結の方法は適宜変更することができる。   Further, the connection of the track members 10a may be performed by connecting the adjacent mounting holes 11 and 11 using appropriate connection fittings or the like, and due to environmental changes such as temperature and humidity between the track members 10a and 10a. The track members 10a and 10a may be arranged and fixed to the mounting base with a gap in consideration of expansion and contraction of the track members 10a and 10a. Thus, the method of connecting the track members 10a and 10a can be changed as appropriate.

さらに、本実施形態に係る軌道部材１０ａの転動体転走面１２の長手方向の一端部には、この長手方向に沿った断面形状が、所定位置Ｐから軌道部材１０ａの長手方向に直交する端面１６上の端点Ｅに向かって、この所定位置Ｐと端点Ｅとを結んだ仮想直線ｌ1よりも外表面方向Ｂに膨出した膨出部１５が形成されている。 Furthermore, at one end portion in the longitudinal direction of the rolling element rolling surface 12 of the raceway member 10a according to the present embodiment, an end face whose cross-sectional shape along the longitudinal direction is orthogonal to the longitudinal direction of the raceway member 10a from a predetermined position P is provided. A bulging portion 15 that bulges in the outer surface direction B from an imaginary straight line l 1 connecting the predetermined position P and the end point E is formed toward the end point E on 16.

このように、軌道部材１０ａの一端部には、この長手方向に沿った断面形状に膨出部１５が形成されているので、軌道部材を連結して軌道部材を形成した場合であっても、軌道部材の継ぎ目に生じる段差による転動体の不具合を防止し、且つシールリップの潤滑剤の保持性が低下することなく、製品寿命の長期化を図ることができる。   Thus, since the bulging part 15 is formed in the cross-sectional shape along this longitudinal direction in the one end part of the track member 10a, even if it is a case where a track member is formed by connecting a track member, It is possible to prevent a problem of the rolling element due to a step generated at the joint of the raceway member, and to prolong the product life without reducing the lubricant retaining property of the seal lip.

この膨出部１５について図２を参照して詳述する。図２に示すように、軌道部材１０ａの一端部には、膨出部１５の始点となる所定位置Ｐから膨出部１５の終点となる端点Ｅに向かって研削加工が施されており、この研削加工は、所定位置Ｐから軌道部材１０ａの長手方向に沿った端面に向かって延びる第一面１３と、この第一面１３の所定位置Ｐと反対に位置する他端Ｃから端点Ｅに向かって延びる第二面１４とから形成されている。   The bulging portion 15 will be described in detail with reference to FIG. As shown in FIG. 2, one end of the raceway member 10a is ground from a predetermined position P, which is the starting point of the bulging portion 15, toward an end point E, which is the ending point of the bulging portion 15, The grinding is performed from the predetermined position P toward the end point E from the first surface 13 extending toward the end surface along the longitudinal direction of the raceway member 10a and the other end C of the first surface 13 opposite to the predetermined position P. And a second surface 14 extending in the direction.

図２に示すように、第一面１３と第二面１４との連続点である他端Ｃの位置は、所定位置Ｐと端点Ｅとを結んだ仮想直線ｌ1よりも軌道部材１０ａの外表面側に位置しており、この形状により、膨出部１５は、他端Ｃを頂点とする膨出形状を形成している。 As shown in FIG. 2, the position of the other end C, which is a continuous point between the first surface 13 and the second surface 14, is more outside the track member 10 a than the virtual straight line l 1 connecting the predetermined position P and the end point E. Located on the front surface side, the bulging portion 15 forms a bulging shape having the other end C as a vertex due to this shape.

またさらに、所定位置Ｐと端点Ｅとの長手方向と直交する向きの距離Ｈ1は、後述するシールリップ４０の変形代Ｚよりも大きく形成され、例えば０．１〜０．５ｍｍに形成されている。また、所定位置Ｐと端点Ｅとの長手方向に沿った距離Ｌは、転動体３０の直径Ｒよりも小さく形成されている。なお、所定位置Ｐと他端Ｃとの長手方向と直交する向きの距離Ｈ2は、転動体３０の損傷を防止することができる程度の深さに形成すればよく、例えば、１〜５０μｍに形成されている。 Furthermore, the distance H 1 in the direction perpendicular to the longitudinal direction between the predetermined position P and the end point E is formed to be larger than the deformation allowance Z of the seal lip 40 described later, for example, 0.1 to 0.5 mm. Yes. Further, the distance L along the longitudinal direction between the predetermined position P and the end point E is formed smaller than the diameter R of the rolling element 30. The distance H 2 in the direction perpendicular to the longitudinal direction between the predetermined position P and the other end C may be formed to a depth that can prevent the rolling element 30 from being damaged, for example, 1 to 50 μm. Is formed.

さらに、第一面１３は、転動体転走面１２が形成されている軌道部材１０ａの両側面に形成されており、第二面１４は、軌道部材１０ａの端面の全周に形成されている。   Furthermore, the 1st surface 13 is formed in the both sides | surfaces of the track member 10a in which the rolling-element rolling surface 12 is formed, and the 2nd surface 14 is formed in the perimeter of the end surface of the track member 10a. .

再び図３を参照すると、本実施形態に係る軌道部材１０ａを用いた運動案内装置１は、移動部材２０の長手方向に沿った両端面にエンドプレート２１，２１が取り付けられており、エンドプレート２１には、移動部材２０に封入された潤滑剤を所定の変形代Ｚをもって封止するシールリップ４０が取り付けられている。シールリップ４０は、移動部材２０の移動に伴って弾性変形をすればどのような材料によって形成しても構わないが、例えば、ゴムや合成樹脂等によって形成することができる。この潤滑剤が移動部材２０内に封入されることにより、転動体転走面１２および転動体３０に潤滑剤が塗布され、転動体転走面１２内を円滑に転動体３０が転動することができるようになっている。なお、本実施形態において、転動体３０は円筒状のローラで形成した場合について説明したが、転動体３０はこのような形状に限られず、例えば球状のボールを用いることもできる。   Referring again to FIG. 3, in the motion guide apparatus 1 using the track member 10 a according to the present embodiment, end plates 21 and 21 are attached to both end surfaces along the longitudinal direction of the moving member 20, and the end plate 21. Is attached with a seal lip 40 for sealing the lubricant sealed in the moving member 20 with a predetermined deformation margin Z. The seal lip 40 may be formed of any material as long as it is elastically deformed with the movement of the moving member 20, but can be formed of, for example, rubber or synthetic resin. By encapsulating the lubricant in the moving member 20, the lubricant is applied to the rolling element rolling surface 12 and the rolling element 30, and the rolling element 30 rolls smoothly in the rolling element rolling surface 12. Can be done. In this embodiment, the case where the rolling element 30 is formed of a cylindrical roller has been described. However, the rolling element 30 is not limited to such a shape, and for example, a spherical ball can be used.

なお、転動体３０は、転動体転走面１２と移動部材２０の転動体転走面１２と対向する位置に形成された図示しない負荷転動体転走面とによって形成された転動体転走路を転走し、一方のエンドプレート２１に形成された図示しない方向転換路を介して、移動部材２０に前記負荷転動体転走面と略平行に穿孔された無負荷転動体転走路を通過し、他方のエンドプレート２１に形成された図示しな方向転換路を介して、再び転動体転走路に戻ることで、無限循環を実現している。   The rolling element 30 is a rolling element rolling path formed by a rolling element rolling surface 12 and a load rolling element rolling surface (not shown) formed at a position facing the rolling element rolling surface 12 of the moving member 20. Rolling and passing through a no-load rolling element rolling path drilled in the moving member 20 substantially parallel to the loaded rolling element rolling surface through a direction changing path (not shown) formed in one end plate 21; An infinite circulation is realized by returning to the rolling element rolling path again through a direction changing path (not shown) formed on the other end plate 21.

次に、図４及び図５を参照して、本実施形態に係る軌道部材１０の継ぎ目を移動部材２０が通過する際の動作について説明する。   Next, with reference to FIG.4 and FIG.5, the operation | movement at the time of the movement member 20 passing the seam of the track member 10 which concerns on this embodiment is demonstrated.

図４は、位置１から位置５に向かって移動部材２０が軌道部材１０の長手方向に沿って移動する場合のシールリップ４０の動きについて、説明した図である。図４の位置１においては、シールリップ４０は、変形代Ｚ分だけ屈曲しており、移動部材２０内に封入された潤滑剤を封止している。この後、所定位置Ｐ1を通過して位置２まで移動すると、シールリップ４０は、第一面１３に沿って、徐々に屈曲が延びる。そして、軌道部材１０ａ，１０ａの継ぎ目である位置３まで移動すると、シールリップ４０は完全に第一面から離間し、屈曲状態が解除されて自然長の状態となり継ぎ目を通過する。次に位置４まで移動すると、第一面１３に沿って、徐々に屈曲していき、所定位置Ｐ2を通過して再度変形代Ｚだけ屈曲して潤滑剤の封止を行う。 FIG. 4 is a diagram illustrating the movement of the seal lip 40 when the moving member 20 moves from the position 1 toward the position 5 along the longitudinal direction of the track member 10. In the position 1 of FIG. 4, the seal lip 40 is bent by the deformation allowance Z, and seals the lubricant enclosed in the moving member 20. Thereafter, when the seal lip 40 moves to the position 2 through the predetermined position P 1 , the bending of the seal lip 40 gradually extends along the first surface 13. And if it moves to the position 3 which is the joint of the track members 10a, 10a, the seal lip 40 is completely separated from the first surface, the bent state is released, and it becomes a natural length state and passes through the joint. Now it moves to the position 4, along the first surface 13, is gradually bent, performs sealing of lubricant bent again only deformation allowance Z passes through the predetermined position P 2.

ここで、位置３から位置４に移動する際に、軌道部材１０ａの端面に形成される端点Ｅ2と所定位置Ｐ2との長手方向と直交する向きの距離は、シールリップ４０の変形代Ｚよりも大きく形成されているので、シールリップ４０が鋭利な角部として形成される端点Ｅ2に接触することがなく、シールリップ４０の損傷を防止することができるようになっている。 Here, when moving from position 3 to position 4, the distance in the direction perpendicular to the longitudinal direction between the end point E 2 formed on the end surface of the track member 10a and the predetermined position P 2 is the deformation margin Z of the seal lip 40. Since the seal lip 40 is formed larger than the end point E 2 formed as a sharp corner, the seal lip 40 can be prevented from being damaged.

図５は、移動部材２０が軌道部材１０の継ぎ目を通過する際の転動体３０の動きを説明した図である。図５に示すように、所定位置Ｐと端点Ｅとの長手方向に沿った距離は、転動体３０の直径Ｒよりも小さく形成されている。このように転動体３０の直径Ｒを形成すると、軌道部材１０の継ぎ目において一方の軌道部材１０ａの所定位置Ｐ1から他方の軌道部材１０ａの所定位置Ｐ2までの間に存在する転動体３０の数を多くとも２個に抑えることができ、軌道部材１０の継ぎ目における定格荷重の過大な減少を抑制することができる。 FIG. 5 is a diagram illustrating the movement of the rolling element 30 when the moving member 20 passes through the joint of the track member 10. As shown in FIG. 5, the distance along the longitudinal direction between the predetermined position P and the end point E is smaller than the diameter R of the rolling element 30. When the diameter R of the rolling element 30 is formed in this way, the rolling element 30 existing between the predetermined position P 1 of one of the track members 10 a and the predetermined position P 2 of the other track member 10 a at the joint of the track members 10. The number can be suppressed to at most two, and an excessive decrease in the rated load at the joint of the track member 10 can be suppressed.

なお、第一面１３は、上述したようにシールリップ４０を屈曲させながら摺動するので、研削加工を施してある。さらに、第一面１３は、転動体３０の軌道部材１０の継ぎ目による損傷を防止するために形成されているので、転動体転走面１２が形成されている部位にのみ形成されていればよく、本実施形態における軌道部材１０ａにおいては、軌道部材１０ａの長手方向の端面における両側面にのみ形成されている。これに対し、第二面１４は、シールリップ４０の損傷を防止するために形成されているので、上述した第一面１３と同様に軌道部材１０ａの両側面に形成されるのみならず、移動部材２０と軌道部材１０とが対向する面である上面を含んだ軌道部材１０ａの端面の全周にわたって形成されている。また、上述したように、第二面１４は、シールリップ４０が鋭利な角部として形成される端点Ｅ2に接触することを防止することができればよいので、粗加工によって加工されている。 Since the first surface 13 slides while bending the seal lip 40 as described above, it is ground. Further, since the first surface 13 is formed to prevent damage due to the joint of the raceway member 10 of the rolling element 30, it is sufficient that the first surface 13 is formed only at a portion where the rolling element rolling surface 12 is formed. In the raceway member 10a in this embodiment, the raceway member 10a is formed only on both side surfaces of the end face in the longitudinal direction of the raceway member 10a. On the other hand, since the second surface 14 is formed to prevent the seal lip 40 from being damaged, the second surface 14 is not only formed on both side surfaces of the raceway member 10a in the same manner as the first surface 13 described above, but also moved. The member 20 and the track member 10 are formed over the entire circumference of the end surface of the track member 10a including the upper surface which is a surface facing the member 20 and the track member 10. Further, as described above, the second surface 14 is processed by roughing as long as it can prevent the seal lip 40 from coming into contact with the end point E 2 formed as a sharp corner.

また、所定位置Ｐから他端Ｃまでの長手方向と直交する向きの距離は、転動体３０の損傷を防止することができる程度の深さに形成されているので、軌道部材１０の継ぎ目において転動体３０が損傷することを防止することができる。   Further, the distance in the direction orthogonal to the longitudinal direction from the predetermined position P to the other end C is formed to a depth that can prevent the rolling element 30 from being damaged. It is possible to prevent the moving body 30 from being damaged.

また、図６に示すように、本実施形態に係る軌道部材の第一面１３´は、湾曲した円弧形状に形成することもできる。このように、第一面１３´を円弧形状に形成すると、所定位置Ｐと他端Ｃとを結んだ仮想直線ｌ2よりも軌道部材１０ａの外表面側にさらに膨出した第２の膨出部１７を形成することができる。このように第一面１３´を円弧形状に形成すると、移動部材２０の移動に伴ってシールリップ４０を無理なく円滑に屈曲させることが可能となる。 Moreover, as shown in FIG. 6, the first surface 13 ′ of the track member according to the present embodiment can be formed in a curved arc shape. Thus, when forming the first surface 13 'in an arc shape, a second bulge which is further swollen to the outer surface side of the track member 10a to the virtual straight line l 2 that connects the predetermined position P and the other end C The part 17 can be formed. When the first surface 13 ′ is formed in an arc shape as described above, the seal lip 40 can be bent smoothly without difficulty as the moving member 20 moves.

以上、本実施形態に係る軌道部材の端面に形成される膨出部は、第一面および第二面によって形成した場合について説明したが、膨出部は上述した形状に限定されず、例えば、所定位置Ｐから端点Ｅに向かって円弧形状に形成することもでき、この円弧形状は真円、楕円、クロソイド曲線やこれらを複合した曲線形状に形成することができる。また、複数の点を頂点とする多角形状であっても、同様の効果が得られる。その様な変更又は改良を加えた形態も本発明の技術的範囲に含まれうることが、特許請求の範囲の記載から明らかである。   As mentioned above, although the bulging part formed in the end surface of the track member concerning this embodiment explained the case where it formed with the 1st surface and the 2nd surface, the bulging part is not limited to the shape mentioned above, for example, It can also be formed in a circular arc shape from the predetermined position P toward the end point E, and this circular arc shape can be formed into a perfect circle, an ellipse, a clothoid curve, or a curved shape combining these. Further, the same effect can be obtained even in a polygonal shape having a plurality of points as vertices. It is apparent from the scope of the claims that the embodiments added with such changes or improvements can be included in the technical scope of the present invention.

１ 運動案内装置， １０，１０ａ 軌道部材， １１ 取付孔， １２ 転動体転走面， １３ 第一面， １４ 第二面， ２０ 移動部材， ２１ エンドプレート， ３０ 転動体， ４０ 弾性部材， Ｐ 所定位置， Ｃ 他端， Ｅ 端点， ｌ1 仮想直線。 DESCRIPTION OF SYMBOLS 1 Movement guide device 10, 10a Track member, 11 Mounting hole, 12 Rolling body rolling surface, 13 1st surface, 14 2nd surface, 20 Moving member, 21 End plate, 30 Rolling body, 40 Elastic member, P predetermined Position, C other end, E end point, l 1 virtual line.

Claims (7)

長手方向に沿って転動体転走面が形成された軌道部材であって、
前記軌道部材の長手方向の少なくとも一端部の前記転動体転走面は、前記長手方向に沿った断面形状において、所定位置と長手方向に直交する端面上の端点とを結んだ仮想直線よりも膨出した膨出部を有することを特徴とする軌道部材。 A raceway member in which a rolling element rolling surface is formed along the longitudinal direction,
The rolling element rolling surface of at least one end in the longitudinal direction of the raceway member swells more than a virtual straight line connecting a predetermined position and an end point on the end surface orthogonal to the longitudinal direction in a cross-sectional shape along the longitudinal direction. A track member having a protruding bulged portion. 前記膨出部は、前記所定位置から前記膨出部の頂点に向かう第一面と、前記頂点から前記端点に向かう第二面とによって形成されていることを特徴とする請求項１に記載の軌道部材。   The said bulging part is formed by the 1st surface which goes to the vertex of the said bulging part from the said predetermined position, and the 2nd surface which goes to the said end point from the said vertex. Track member. 前記第一面は、少なくとも前記転動体転走面に形成され、前記第二面は、前記端面の全周に形成されていることを特徴とする請求項２に記載の軌道部材。   The track member according to claim 2, wherein the first surface is formed at least on the rolling element rolling surface, and the second surface is formed on the entire circumference of the end surface. 前記第一面は、前記所定位置と前記頂点とを結んだ仮想直線よりも膨出した第２の膨出部が形成されることを特徴とする請求項２又は３に記載の軌道部材。   4. The track member according to claim 2, wherein the first surface is formed with a second bulging portion that bulges from an imaginary straight line connecting the predetermined position and the apex. 長手方向に沿って転動体転走面が形成された軌道部材と、前記転動体転走面を転動する複数の転動体を介して前記軌道部材に沿って移動自在に組み付けられた移動部材とを備え、前記移動部材には、前記移動部材に封入された潤滑剤を所定の変形代をもって封止する弾性部材を備えた運動案内装置であって、
前記軌道部材の長手方向の少なくとも一端部の前記転動体転走面は、前記長手方向に沿った断面形状において、所定位置と長手方向に直交する端面上の端点とを結んだ仮想直線よりも膨出した膨出部を有する軌道部材を備えたことを特徴とする運動案内装置。 A track member having a rolling element rolling surface formed along the longitudinal direction, and a moving member assembled so as to be movable along the track member via a plurality of rolling elements rolling on the rolling element rolling surface; The movement member is provided with an elastic member that seals the lubricant enclosed in the movement member with a predetermined deformation allowance,
The rolling element rolling surface of at least one end in the longitudinal direction of the raceway member swells more than a virtual straight line connecting a predetermined position and an end point on the end surface orthogonal to the longitudinal direction in a cross-sectional shape along the longitudinal direction. A motion guide apparatus comprising a track member having a protruding bulge portion. 前記所定位置と前記端点の前記長手方向と直交する向きの距離は、前記変形代よりも大きいことを特徴とする請求項５に記載の運動案内装置。   The motion guide device according to claim 5, wherein a distance between the predetermined position and the end point in a direction orthogonal to the longitudinal direction is greater than the deformation allowance. 前記所定位置と前記端点との前記長手方向に沿った距離は、前記転動体の直径よりも小さいことを特徴とする請求項５又は６に記載の運動案内装置。   The motion guide apparatus according to claim 5 or 6, wherein a distance along the longitudinal direction between the predetermined position and the end point is smaller than a diameter of the rolling element.
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