JP2022150830A

JP2022150830A - Linear guide

Info

Publication number: JP2022150830A
Application number: JP2021053611A
Authority: JP
Inventors: 匠中川; Takumi Nakagawa
Original assignee: NSK Ltd
Current assignee: NSK Ltd
Priority date: 2021-03-26
Filing date: 2021-03-26
Publication date: 2022-10-07
Anticipated expiration: 2041-03-26
Also published as: JP7552472B2

Abstract

To provide a linear guide in which a lubrication unit can stably supply a lubricant for a long period of time.SOLUTION: A lubricant supply member 50 comprises a first recess 53 formed in an upper position of a guide rail 20, a pair of second recesses 54 formed in positions of left-and-right both-side faces of the guide rail 20, and protrusions 51, 52 which can come in slide contact with rail-side raceway surfaces 21, 22 of the guide rail 20. A lubrication unit 33 comprises: a first cylinder portion 44 arranged in the first recess 53 in such a manner that the first cylinder portion 44 allows the vertical movement of a slider 30 of the first recess 53 and pressurizes the first recess 53 to the outside of the slider 30 in a width direction; and a pair of second cylinder portions 45 arranged in a pair of the second recesses 54 in such a manner that the cylinder portions 45 allows the movement of a pair of the second recesses 54 in the width direction of the slider 30, and pressurizes a pair of the second recesses 54 to a lower direction of the slider 30.SELECTED DRAWING: Figure 5

Description

本発明は、リニアガイドに関し、より詳細には、長期間に亘って潤滑剤を案内レール、スライダ、及び転動体の接触部に供給することができるリニアガイドに関する。 BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a linear guide, and more particularly to a linear guide capable of supplying lubricant to contact portions of guide rails, sliders and rolling elements for a long period of time.

従来、リニアガイドは、軸方向に延びる案内レールと、案内レールに相対移動可能に跨架されたスライダと、を備え、案内レール及びスライダに形成された転動体転動溝間を循環する複数の転動体（ボール）を介して、スライダが案内レール上を軸方向に相対移動する。このようなリニアガイドは、各種生産設備の直線移動機構に多用されている。このリニアガイドを、長期間に亘って安定して使用するためには、転動体転動溝及びボールに十分な量の潤滑剤を供給して、潤滑状態を良好に維持することが重要である。 Conventionally, a linear guide includes a guide rail extending in the axial direction and a slider straddled over the guide rail so as to be relatively movable. The slider moves relatively axially on the guide rail via rolling elements (balls). Such linear guides are widely used in linear movement mechanisms of various production facilities. In order to use this linear guide stably for a long period of time, it is important to supply a sufficient amount of lubricant to the rolling grooves of the rolling elements and the balls to maintain a good lubricating state. .

特許文献１には、潤滑剤を含有する多孔質の潤滑剤供給部材をケース内に収容してスライダの端部に取り付け、案内レールの転動体転動溝に接触する潤滑剤供給部材から潤滑剤を供給するようにした直動案内軸受装置が記載されている。
また、特許文献２では、エンドキャップの外側面に、エンドキャップに近い側から、補強板、潤滑剤含有部材及びサイドシールが重ね合わせた状態で固定されている。潤滑剤含有部材は、エンドキャップに合わせたコ字形状に形成されていて、その連結部に上部を開放して形成された貫通孔に、その内径よりも外径が大きいリング状部材を嵌め込むことにより、貫通孔が押し広げられ、両袖部を案内レールに押しつけている。また、両袖部の外側面側を開放した貫通孔にそれぞれ、リング状部材が嵌め込まれている。 In Patent Document 1, a porous lubricant supply member containing a lubricant is housed in a case and attached to the end of a slider, and the lubricant is supplied from the lubricant supply member in contact with the rolling groove of the rolling element of the guide rail. A linear guide bearing assembly is described which is adapted to provide a
Further, in Patent Document 2, a reinforcing plate, a lubricant-containing member, and a side seal are fixed to the outer surface of the end cap in an overlapping state from the side closer to the end cap. The lubricant-containing member is formed in a U-shape to match the end cap, and a ring-shaped member having an outer diameter larger than the inner diameter is fitted into a through hole formed in the connecting portion with an open top. As a result, the through hole is widened and the sleeves are pressed against the guide rail. Further, a ring-shaped member is fitted in each of the through-holes that are open on the outer side surfaces of both sleeves.

特開２００６－４６５２９号公報JP 2006-46529 A 特開平０９－１１２５５１号公報JP-A-09-112551

ところで、特許文献１の潤滑ユニット１００では、図１５（ａ）に示すように、潤滑剤を含有する潤滑剤供給部材１０１は、円筒部１０４が一体に形成されたケース１０３に収納されている。また、潤滑剤供給部材１０１は、上部に形成された凹部１０２にケース１０３の円筒部１０４が嵌め込まれて、潤滑剤供給部材１０１の上端部をスライダの幅方向外方に押圧変形させると共に、潤滑剤供給部材１０１の摺動部１０５の裏面が、ケース１０３の両側面に設けられた押圧部１０６で押圧されて、案内レール１０７の転動体転動溝１０８に押し付けられて、潤滑剤を供給するようになっている。 By the way, in the lubricating unit 100 of Patent Document 1, as shown in FIG. 15(a), the lubricant supply member 101 containing the lubricant is housed in the case 103 integrally formed with the cylindrical portion 104. As shown in FIG. A cylindrical portion 104 of a case 103 is fitted in a concave portion 102 formed in the upper portion of the lubricant supply member 101 to press and deform the upper end portion of the lubricant supply member 101 outward in the width direction of the slider. The back surface of the sliding portion 105 of the agent supply member 101 is pressed by the pressing portions 106 provided on both side surfaces of the case 103 and pressed against the rolling element rolling grooves 108 of the guide rail 107 to supply the lubricant. It's like

しかしながら、図１５（ｂ）に示すように、長期間の使用に伴って潤滑剤供給部材１０１に含浸した潤滑剤量が減ると、潤滑剤供給部材１０１の寸法が、図中破線で示す状態から図中実線で示すように小さくなり、円筒部１０４及び押圧部１０６による押圧力が低下し、潤滑剤供給部材１０１と案内レール１０７の転動体転動溝１０８との接触状態が変化して十分な潤滑状態を保てなくなる虞がある。特に、潤滑剤供給部材１０１の潤滑剤含有量が非常に多いと、潤滑剤の減少による潤滑剤供給部材１０１の寸法変化が大きく、上記した不具合が生じる可能性が高くなる。 However, as shown in FIG. 15(b), when the amount of lubricant impregnated in the lubricant supply member 101 decreases with long-term use, the dimensions of the lubricant supply member 101 change from the state indicated by the dashed line in the figure. As indicated by the solid line in the figure, the pressure from the cylindrical portion 104 and the pressing portion 106 decreases, and the contact state between the lubricant supply member 101 and the rolling element rolling grooves 108 of the guide rail 107 changes and becomes sufficient. There is a possibility that the lubricating state cannot be maintained. In particular, when the lubricant content of the lubricant supply member 101 is extremely large, the dimensional change of the lubricant supply member 101 due to the reduction of the lubricant is large, and the possibility of causing the above-described problems increases.

また、図１６（ａ）に示すような従来の潤滑ユニット２００では、潤滑剤供給部材２０１は、上部に形成された略Ｕ字形の上溝２０２と、両側面に形成された略Ｕ字形の一対の横溝２０３と、案内レール２０６の転動体転動溝２０７に摺接する摺動部２０８と、を備える。上溝２０２には、上部リング２０４が設置され、一対の横溝２０３には、それぞれ側面リング２０５が設置され、側面リング２０５には、不図示のサイドシール及び潤滑ユニット２００をスライダに固定するための不図示のねじが挿通されている。このため、側面リング２０５と案内レール２０６との相対位置は、不図示の転動体を介して固定となる。 In the conventional lubricating unit 200 as shown in FIG. 16(a), the lubricant supply member 201 includes a substantially U-shaped upper groove 202 formed in the upper portion and a pair of substantially U-shaped grooves formed on both side surfaces. It has a lateral groove 203 and a sliding portion 208 that comes into sliding contact with the rolling element rolling groove 207 of the guide rail 206 . An upper ring 204 is installed in the upper groove 202, and a side ring 205 is installed in each of the pair of lateral grooves 203. The side rings 205 are provided with side seals (not shown) and an element for fixing the lubrication unit 200 to the slider. The shown screw is inserted. Therefore, the relative positions of the side ring 205 and the guide rail 206 are fixed via rolling elements (not shown).

この場合も、図１６（ｂ）に示すように、長期間の使用により潤滑剤供給部材２０１に含浸した潤滑剤量が低減すると、潤滑剤供給部材２０１の寸法が、図中破線で示す状態から図中実線で示すように小さくなる。その際、側面リング２０５の位置が固定されているため、潤滑剤供給部材２０１は、側面リング２０５に向かって矢印方向に変形する。この結果、潤滑剤供給部材２０１の摺動部２０８と案内レール２０６の転動体転動溝２０７との接触状態が変化して十分な潤滑状態を保てなくなる虞がある。 In this case also, as shown in FIG. 16B, when the amount of lubricant impregnated in the lubricant supply member 201 decreases due to long-term use, the dimensions of the lubricant supply member 201 change from the state indicated by the dashed line in the figure. It becomes smaller as indicated by the solid line in the figure. At this time, since the position of the side ring 205 is fixed, the lubricant supply member 201 deforms toward the side ring 205 in the direction of the arrow. As a result, the contact state between the sliding portion 208 of the lubricant supply member 201 and the rolling element rolling groove 207 of the guide rail 206 may change, making it impossible to maintain a sufficient lubricating state.

また、特許文献２では、潤滑剤含有部材は、連結部の貫通孔に嵌め込まれたリング状部材で押圧されるとともに、両袖部の２個のリング状部材で位置が固定されている。潤滑剤含有部材の油が減ると、潤滑剤含有部材の寸法は小さくなる。この時、両袖部の２個のリング状部材で位置が固定されているため、潤滑剤含有部材は、案内レールの転動体転動溝から離れる方向に変形してしまう。この変形に伴って、潤滑剤含有部材は、案内レールの転動体転動溝への接触状態が変化してしまう。よって、潤滑剤の塗布状態が不安定になり、潤滑状態を保てなくなるおそれがある。 Further, in Patent Document 2, the lubricant-containing member is pressed by a ring-shaped member fitted in the through hole of the connecting portion, and fixed in position by two ring-shaped members on both sleeve portions. As the lubricant containing member is depleted of oil, the size of the lubricant containing member is reduced. At this time, since the position is fixed by the two ring-shaped members on both sleeves, the lubricant-containing member is deformed in the direction away from the rolling element rolling groove of the guide rail. With this deformation, the contact state of the lubricant-containing member with the rolling groove of the guide rail changes. Therefore, the applied state of the lubricant becomes unstable, and there is a possibility that the lubricating state cannot be maintained.

本発明は、前述した課題に鑑みてなされたものであり、その目的は、潤滑ユニットが長期間に亘って安定して潤滑剤を供給することができるリニアガイドを提供することにある。 SUMMARY OF THE INVENTION An object of the present invention is to provide a linear guide in which a lubricating unit can stably supply lubricant over a long period of time.

本発明の上記目的は、下記の構成により達成される。
（１）案内レールと、該案内レールを跨ぐようにスライド自在に係合するスライダと、潤滑剤を含浸可能な潤滑剤供給部材を有し、前記スライダの軸方向の端部に取り付けられた潤滑ユニットと、を備えるリニアガイドであって、
前記潤滑剤供給部材は、前記案内レールの上方位置に形成された第１の凹部と、前記案内レールの左右両側面位置に形成された一対の第２の凹部と、前記案内レールのレール側軌道面に摺接可能な突部と、を備え、
前記潤滑ユニットは、
前記第１の凹部の前記スライダの上下方向への移動を許容し、前記第１の凹部を前記スライダの幅方向外方に押圧するように、前記第１の凹部内に配置される上部押圧手段と、
前記一対の第２の凹部の前記スライダの幅方向への移動を許容し、前記一対の第２の凹部を前記スライダの下方向にそれぞれ押圧するように、前記一対の第２の凹部内に配置される一対の側面押圧手段と、
を備えることを特徴とするリニアガイド。
（２）前記潤滑ユニットは、前記潤滑剤供給部材と、該潤滑剤供給部材を収容するケースと、を備え、
前記上部押圧手段、及び前記一対の側面押圧手段は、前記ケースの内部に設けられることを特徴とする（１）に記載のリニアガイド。
（３）前記上部押圧手段は、前記第１の凹部の幅より外径が大きい第１の円筒部であり、
前記一対の側面押圧手段は、前記一対の第２の凹部の幅以下の外径を有する第２の円筒部であり、
前記第２の円筒部は、前記第２の凹部に対して、前記第２の凹部の幅と前記第２の円筒部の外径との差の１／２より大きく下方にオフセットしていることを特徴とする（１）または（２）に記載のリニアガイド。
（４）前記上部押圧手段、及び前記一対の側面押圧手段を構成する前記第１及び第２の円筒部の先端側縁部には、面取り部が設けられていることを特徴とする（３）に記載のリニアガイド。
（５）前記上部押圧手段の下面は、水平方向に切り欠かれた平面部を有することを特徴とする（１）～（４）のいずれかに記載のリニアガイド。
（６）前記側面押圧手段の幅方向側面は、鉛直方向に切り欠かれた平面部を有することを特徴とする（１）～（５）のいずれかに記載のリニアガイド。 The above objects of the present invention are achieved by the following configurations.
(1) A lubricator having a guide rail, a slider slidably engaged so as to straddle the guide rail, and a lubricant supply member capable of being impregnated with a lubricant, and attached to an axial end of the slider. A linear guide comprising a unit,
The lubricant supply member includes a first recess formed above the guide rail, a pair of second recesses formed on both left and right side surfaces of the guide rail, and a rail-side track of the guide rail. and a projection that can slide on the surface,
The lubrication unit is
Upper pressing means arranged in the first recess to allow the slider to move in the vertical direction of the first recess and to press the first recess outward in the width direction of the slider. When,
Disposed within the pair of second recesses so as to allow the pair of second recesses to move in the width direction of the slider and press the pair of second recesses downward of the slider. a pair of lateral pressing means;
A linear guide comprising:
(2) The lubrication unit includes the lubricant supply member and a case that houses the lubricant supply member,
The linear guide according to (1), wherein the upper pressing means and the pair of side pressing means are provided inside the case.
(3) the upper pressing means is a first cylindrical portion having an outer diameter larger than the width of the first recess;
The pair of side pressing means is a second cylindrical portion having an outer diameter equal to or less than the width of the pair of second recesses,
The second cylindrical portion is offset downward with respect to the second concave portion by more than 1/2 of the difference between the width of the second concave portion and the outer diameter of the second cylindrical portion. The linear guide according to (1) or (2), characterized by:
(4) A chamfered portion is provided at a tip side edge portion of each of the first and second cylindrical portions constituting the upper pressing means and the pair of side pressing means (3). linear guide described in .
(5) The linear guide according to any one of (1) to (4), characterized in that the lower surface of the upper pressing means has a horizontally cut flat portion.
(6) The linear guide according to any one of (1) to (5), characterized in that the width direction side surface of the side pressing means has a flat portion notched in the vertical direction.

本発明のリニアガイドによれば、潤滑剤を含浸可能な潤滑剤供給部材は、案内レールの上方位置に形成された第１の凹部と、案内レールの左右両側面位置に形成された一対の第２の凹部と、案内レールのレール側軌道面に摺接可能な突部と、を備える。また、潤滑ユニットは、第１の凹部のスライダの上下方向への移動を許容し、第１の凹部をスライダの幅方向外方に押圧するように、第１の凹部内に配置される上部押圧手段と、一対の第２の凹部のスライダの幅方向への移動を許容し、一対の第２の凹部をスライダの下方向にそれぞれ押圧するように、一対の第２の凹部内に配置される一対の側面押圧手段と、を備える。これにより、長期間の使用に伴って含浸した潤滑剤量が少なくなり、潤滑剤供給部材の寸法が小さくなっても、第１の凹部が、上部押圧手段によりスライダの幅方向外方に押圧され、また、一対の第２の凹部が、一対の側面押圧手段によりスライダの下方向にそれぞれ押圧されているので、潤滑剤供給部材の突部がレール側軌道面を押し付ける力が確保される。したがって、潤滑ユニットが長期間に亘って安定して潤滑剤を供給することができる。 According to the linear guide of the present invention, the lubricant supply member that can be impregnated with lubricant includes the first recess formed above the guide rail and the pair of second recesses formed on both left and right sides of the guide rail. 2 recesses, and projections that can slidably contact the rail-side raceway surface of the guide rail. Also, the lubricating unit includes an upper pressing member disposed in the first recess so as to allow the slider to move in the vertical direction of the first recess and press the first recess outward in the width direction of the slider. Means are arranged in the pair of second recesses so as to allow the pair of second recesses to move in the width direction of the slider and press the pair of second recesses downward of the slider. and a pair of side pressing means. As a result, even if the amount of impregnated lubricant decreases with long-term use and the dimensions of the lubricant supply member become smaller, the first concave portion is pressed outward in the width direction of the slider by the upper pressing means. Also, since the pair of second concave portions are pressed downward of the slider by the pair of side pressing means, the force of pressing the protrusions of the lubricant supply member against the rail-side raceway surface is ensured. Therefore, the lubricating unit can stably supply lubricant over a long period of time.

本発明に係るリニアガイドの斜視図である。1 is a perspective view of a linear guide according to the present invention; FIG. 図１に示すスライダの斜視図である。2 is a perspective view of the slider shown in FIG. 1; FIG. 図２に示すスライダの一部分解斜視図である。3 is a partially exploded perspective view of the slider shown in FIG. 2; FIG. 図３に示す潤滑ユニットの潤滑剤供給部材及びケースの分解斜視図である。4 is an exploded perspective view of a lubricant supply member and a case of the lubrication unit shown in FIG. 3; FIG. （ａ）は、潤滑剤供給部材がケースに収容された状態を示す側面図であり、（ｂ）は、ケースに収容される潤滑剤供給部材の凹部とケースの円筒部との寸法関係を説明するための側面図である。(a) is a side view showing a state in which the lubricant supply member is accommodated in a case, and (b) is an explanation of the dimensional relationship between the concave portion of the lubricant supply member accommodated in the case and the cylindrical portion of the case. FIG. 2 is a side view for ケースの側面図である。It is a side view of a case. ケースの円筒部との干渉による押圧方向及び変位方向を示す潤滑剤供給部材の側面図である。FIG. 5 is a side view of the lubricant supply member showing the direction of pressure and the direction of displacement due to interference with the cylindrical portion of the case; （ａ）は、図６のＸ１－Ｘ１線断面図、（ｂ）は、図７のＸ２－Ｘ２線断面図であり、（ｃ）は、図６のＹ１－Ｙ１線断面図、（ｄ）は、図７のＹ２－Ｙ２線断面図である。(a) is a cross-sectional view along the X1-X1 line in FIG. 6, (b) is a cross-sectional view along the X2-X2 line in FIG. 7, (c) is a cross-sectional view along the Y1-Y1 line in FIG. 6, and (d). 7] is a cross-sectional view along the line Y2-Y2 of FIG. 7. [FIG. 第１実施形態の潤滑ユニットにおいて、含有潤滑剤の低減による潤滑剤供給部材の変形状態を示す側面図である。FIG. 5 is a side view showing a deformed state of the lubricant supply member due to reduction of contained lubricant in the lubricating unit of the first embodiment; 図５のＸ部拡大図である。FIG. 6 is an enlarged view of the X section of FIG. 5; 第２実施形態の潤滑ユニットの潤滑剤供給部材及びケースの斜視図である。FIG. 8 is a perspective view of a lubricant supply member and a case of a lubrication unit of a second embodiment; 図１１に示す潤滑ユニットの潤滑剤供給部材及びケースの分解斜視図である。FIG. 12 is an exploded perspective view of a lubricant supply member and a case of the lubrication unit shown in FIG. 11; 本発明の変形例の潤滑ユニットに係る潤滑剤供給部材がケースに収容された状態を示す側面図である。FIG. 11 is a side view showing a state in which a lubricant supply member according to a lubrication unit of a modified example of the present invention is housed in a case; 本発明の他の変形例の潤滑ユニットに係る潤滑剤供給部材がケースに収容された状態を示す側面図である。FIG. 11 is a side view showing a state in which a lubricant supply member in a lubricating unit according to another modified example of the present invention is housed in a case; （ａ）は、従来の潤滑ユニットの側面図であり、（ｂ）は、潤滑剤供給部材が含有潤滑剤の低減により変形する状態を示す側面図である。(a) is a side view of a conventional lubricating unit, and (b) is a side view showing a state in which a lubricant supply member is deformed due to reduction of contained lubricant. （ａ）は、従来の他の潤滑ユニットの側面図であり、（ｂ）は、潤滑剤供給部材が含有潤滑剤の低減により変形する状態を示す側面図である。(a) is a side view of another conventional lubricating unit, and (b) is a side view showing a state in which a lubricant supply member is deformed due to reduction of contained lubricant.

以下、本発明の各実施形態に係るリニアガイドを図面に基づいて詳細に説明する。なお、以下の説明において、スライダの上下方向、幅方向とは、長手方向を水平にして配置された案内レールに組み付けられたスライダの状態における方向をそれぞれ表しており、スライダの幅方向は、案内レールの長手方向及びスライダの上下方向に垂直な方向であり、左右方向とも言う。 Hereinafter, linear guides according to respective embodiments of the present invention will be described in detail based on the drawings. In the following description, the vertical direction and the width direction of the slider respectively indicate the directions in which the slider is mounted on a guide rail arranged with its longitudinal direction horizontal. It is a direction perpendicular to the longitudinal direction of the rail and the vertical direction of the slider, and is also called the horizontal direction.

（第１実施形態）
図１に示すように、第１実施形態のリニアガイド１０は、直線状の案内レール２０と、案内レール２０を跨ぐように組み付けられ、不図示の複数の転動体（ボール）を介してスライド自在に係合するスライダ３０と、を備えている。 (First embodiment)
As shown in FIG. 1, the linear guide 10 of the first embodiment is assembled to straddle a linear guide rail 20 and the guide rail 20, and is slidable via a plurality of rolling elements (balls) (not shown). and a slider 30 that engages the .

案内レール２０の両側面２３には、断面略半円形または断面ゴシックアーチ形状のレール側軌道面２１が軸方向に形成され、案内レール２０の上面２４と両側面２３とが交差する稜線部には、断面略１／４円弧状のレール側軌道面２２が軸方向に形成されている。 On both side surfaces 23 of the guide rail 20, a rail-side track surface 21 having a substantially semicircular cross section or a Gothic arch cross section is formed in the axial direction. , a rail-side raceway surface 22 having a substantially 1/4 arcuate cross section is formed in the axial direction.

スライダ３０は、図２及び図３に示すように、スライダ本体３１と、スライダ本体３１の軸方向両端部に取り付けられたエンドキャップ３２と、各エンドキャップ３２の更に軸方向端部に取り付けられた潤滑ユニット３３と、からなる。 2 and 3, the slider 30 includes a slider body 31, end caps 32 attached to both ends of the slider body 31 in the axial direction, and further attached to the ends of the end caps 32 in the axial direction. and a lubrication unit 33 .

スライダ本体３１は、略コ字状に形成されており、両袖部の内側面に、案内レール２０のレール側軌道面２１、２２に対向する不図示のスライダ側軌道面を有するとともに、転動体戻し路を有している。また、略コ字状に形成されたエンドキャップ３２は、スライダ本体３１のスライダ側軌道面及び転動体戻し路を連通させる不図示の湾曲路を有しており、レール側軌道面２１、２２、スライダ側軌道面、転動体戻し路、及び両端部の湾曲路で、転動体循環路を形成している。転動体循環路内には、複数のボールが転動自在に装填されている。 The slider main body 31 is formed in a substantially U-shape, and has slider-side raceway surfaces (not shown) facing the rail-side raceway surfaces 21 and 22 of the guide rail 20 on the inner side surfaces of both sleeves. have a return path. The end cap 32 formed in a substantially U-shape has a curved path (not shown) that communicates the slider-side raceway surface of the slider body 31 and the rolling element return path. The slider-side raceway surface, the rolling element return path, and the curved paths at both ends form a rolling element circulation path. A plurality of balls are rotatably loaded in the rolling element circulation path.

図３及び図４を参照して、潤滑ユニット３３は、合成樹脂製のケース４０と、ケース４０内に収容される潤滑剤供給部材５０と、サイドシール６０と、を備える。 3 and 4, the lubricating unit 33 includes a synthetic resin case 40, a lubricant supply member 50 housed in the case 40, and side seals 60. As shown in FIG.

サイドシール６０は、エンドキャップ３２の外形に合わせた略コ字形状の鋼板であり、その両袖部６２には、取付ネジ用の貫通孔６１が形成されるとともに、それら両袖部６２を連結する連結部６３には、グリースニップル用の貫通孔６４が形成されている。サイドシール６０と案内レール２０とは非接触であり、コ字部の内側には、スライダ３０と案内レール２０との間の隙間をシールするため、ニトリルゴムやグリースを含有したポリウレタンゴムなどの弾性体６５が設けられている。 The side seal 60 is a substantially U-shaped steel plate that matches the outer shape of the end cap 32. Both sleeve portions 62 of the side seal 60 are formed with through holes 61 for mounting screws, and the sleeve portions 62 are connected. A through hole 64 for a grease nipple is formed in the connecting portion 63 . The side seal 60 and the guide rail 20 are not in contact with each other, and an elastic rubber such as nitrile rubber or polyurethane rubber containing grease is provided inside the U-shaped portion to seal the gap between the slider 30 and the guide rail 20 . A body 65 is provided.

潤滑剤供給部材５０は、案内レール２０の上面２４及びレール側軌道面２１、２２を含む両側面２３に対向するように、略コ字状に成形される。潤滑剤供給部材５０は、ゴムや合成樹脂等の多孔質体、繊維交絡体などで形成されて、潤滑剤を含浸する。潤滑剤としては、鉱油、合成油、グリースなどを用いることができる。合成樹脂としては、ポリウレタン、ポリエチレン、ポリプロピレンなどを用いることができる。繊維交絡体としては、羊毛フェルト、ポリエステル繊維、ナイロン繊維、アクリル繊維などを用いることができる。 The lubricant supply member 50 is formed in a substantially U-shape so as to face both side surfaces 23 including the upper surface 24 and the rail-side raceway surfaces 21 and 22 of the guide rail 20 . The lubricant supply member 50 is formed of a porous body such as rubber or synthetic resin, or a fiber entangled body, and is impregnated with a lubricant. Mineral oil, synthetic oil, grease, etc. can be used as the lubricant. Polyurethane, polyethylene, polypropylene, or the like can be used as the synthetic resin. Wool felt, polyester fiber, nylon fiber, acrylic fiber and the like can be used as the fiber entanglement body.

潤滑剤供給部材５０の潤滑剤含浸量は、長期間の使用の観点から、７０重量％以上であることが好ましい。また、潤滑剤含浸量の上限は、潤滑剤供給部材５０の強度を考慮して８５重量％以下であることが好ましい。例えば、本実施形態の一例として、潤滑剤供給部材５０は、重量比率を１５：８５とする、ポリエチレンと鉱油とを混合して成形したものが挙げられる。 From the viewpoint of long-term use, the lubricant impregnation amount of the lubricant supply member 50 is preferably 70% by weight or more. Also, the upper limit of the impregnated amount of lubricant is preferably 85% by weight or less in consideration of the strength of the lubricant supply member 50 . For example, as an example of the present embodiment, the lubricant supply member 50 is formed by mixing polyethylene and mineral oil in a weight ratio of 15:85.

潤滑剤供給部材５０のコ字状部の両側面内側には、案内レール２０のレール側軌道面２１に摺接して潤滑剤を供給するための略半円形の突部５１が突設されている。また、コ字状部の両側面と上面との内隅部には、案内レール２０のレール側軌道面２２に摺接して潤滑剤を供給するための１／４円弧状の突部５２が突設されている。 Approximately semicircular projections 51 for supplying lubricant by slidingly contacting the rail-side raceway surface 21 of the guide rail 20 are projected from both side surfaces of the U-shaped portion of the lubricant supply member 50 . . In addition, a 1/4 arc-shaped projection 52 for slidingly contacting the rail-side raceway surface 22 of the guide rail 20 and supplying lubricant protrudes from the inner corners of both side surfaces and the upper surface of the U-shaped portion. is set.

さらに、潤滑剤供給部材５０の上端部略中央には、上方に開放する第１の凹部５３が形成されている。また、潤滑剤供給部材５０の両外側面には、側方に開放する略コの字形の第２の凹部５４が形成されている。第１の凹部５３は、幅方向に対向する互いに平行な２つの平面を持って略コの字形に形成され、第２の凹部５４は、上下方向に対向する互いに平行な２つの平面を持った略コの字形に形成され、該２つの平面と鉛直面との隅部５４ａは曲面形状とされている。 Furthermore, a first concave portion 53 that is open upward is formed substantially in the center of the upper end portion of the lubricant supply member 50 . Further, on both outer side surfaces of the lubricant supply member 50, substantially U-shaped second concave portions 54 are formed that open sideways. The first recess 53 is formed in a substantially U-shape with two parallel planes facing each other in the width direction, and the second recess 54 is formed with two parallel planes facing each other in the vertical direction. It is formed in a substantially U-shape, and the corner 54a between the two planes and the vertical plane is curved.

なお、図４に示すように、突部５１、５２の厚み方向の端面縁部には、それぞれ面取り部５１ａ，５２ａが形成されている。リニアガイド１０のスライダ３０は、機械装置への組付け作業の際に、案内レール２０から取り外され、再度、案内レール２０に取付ける場合がある。その際、潤滑剤供給部材５０の突部５１、５２の端面縁部が、案内レール２０のレール側軌道面２１，２２の端面のエッジと干渉する可能性があるが、上記面取り部５１ａ，５２ａを設けることで、上記干渉が防止されて、組付け作業性を向上することができる。 In addition, as shown in FIG. 4, chamfered portions 51a and 52a are formed at the end face edge portions in the thickness direction of the protrusions 51 and 52, respectively. The slider 30 of the linear guide 10 may be removed from the guide rail 20 and reattached to the guide rail 20 during assembly to the machine. At that time, there is a possibility that the end face edges of the protrusions 51 and 52 of the lubricant supply member 50 interfere with the end face edges of the rail-side raceway surfaces 21 and 22 of the guide rail 20. is provided, the above interference is prevented, and the assembling workability can be improved.

ケース４０は、ポリアセタールやポリアミドなどの硬質樹脂を射出成形して製作されており、エンドキャップ３２と略同一サイズの略コ字状に形成されている。ケース４０は、収容される潤滑剤供給部材５０の外周部を覆う外周壁４１と、潤滑剤供給部材５０の軸方向端面を覆う端壁４２と、によって潤滑剤供給部材５０を収納するための収納部４３を形成している。 The case 40 is manufactured by injection molding a hard resin such as polyacetal or polyamide, and is formed in a substantially U-shape having substantially the same size as the end cap 32 . The case 40 accommodates the lubricant supply member 50 by an outer peripheral wall 41 that covers the outer peripheral portion of the lubricant supply member 50 and an end wall 42 that covers the axial end surface of the lubricant supply member 50 . A portion 43 is formed.

収納部４３内の上部で、左右方向略中央部には、上部押圧手段である第１の円筒部４４が、外周壁４１及び端壁４２に連続して形成されている。また、収納部４３内の左右両側で、高さ方向略中央部には、側面押圧手段である第２の円筒部４５が、外周壁４１及び端壁４２に連続して左右対称に形成されている。また、第２の円筒部４５には、潤滑ユニット３３をスライダ本体３１にねじ固定するためのねじ挿通孔４７が設けられている。
なお、ケース４０は、鋼、アルミニウムなどの金属材料を、切削加工やプレス加工して製作したものであってもよい。 A first cylindrical portion 44 serving as an upper pressing means is formed continuously with the outer peripheral wall 41 and the end wall 42 in the upper portion of the storage portion 43 and substantially in the center in the left-right direction. Further, on both the left and right sides of the housing portion 43, at approximately the center in the height direction, a second cylindrical portion 45, which is a side pressing means, is formed symmetrically and continuously to the outer peripheral wall 41 and the end wall 42. there is Further, the second cylindrical portion 45 is provided with a screw insertion hole 47 for screwing the lubricating unit 33 to the slider body 31 .
Note that the case 40 may be manufactured by cutting or pressing a metal material such as steel or aluminum.

そして、図５に示すように、潤滑剤供給部材５０の第１の凹部５３にケース４０の第１の円筒部４４を嵌め込むと共に、一対の第２の凹部５４に、それぞれ第２の円筒部４５を嵌め込んで、ケース４０の収納部４３内に潤滑剤供給部材５０を収納する。 Then, as shown in FIG. 5, the first cylindrical portion 44 of the case 40 is fitted into the first concave portion 53 of the lubricant supply member 50, and the second cylindrical portions are respectively fitted into the pair of second concave portions 54. 45 is fitted to house the lubricant supply member 50 in the housing portion 43 of the case 40 .

このように、ケース４０は、潤滑剤供給部材５０を収納することで、取り扱い中に、潤滑剤供給部材５０が損傷するのを防止できる。特に、潤滑剤供給部材５０の潤滑剤含浸量が７０重量％以上になると、その分、樹脂の量が少なくなり、潤滑剤供給部材５０の強度が低下するため、ケース４０の使用は有効である。 By housing the lubricant supply member 50 in this way, the case 40 can prevent the lubricant supply member 50 from being damaged during handling. In particular, when the amount of impregnated lubricant in the lubricant supply member 50 is 70% by weight or more, the amount of resin is reduced accordingly, and the strength of the lubricant supply member 50 is lowered. Therefore, the use of the case 40 is effective. .

また、図５（ｂ）に示すように、第１の円筒部４４の外径Ｄ３（図８（ａ）参照）は、第１の凹部５３の内幅（左右幅）Ｄ１より大きく設定されているので、第１の円筒部４４と第１の凹部５３とは、片面当たりＴ１だけ干渉する。即ち、第１の円筒部４４は、締め代Ｔ１（＝（Ｄ３－Ｄ１）／２）で第１の凹部５３に圧入される。円筒部４４と凹部５３との締め代Ｔ１は、０．１～０．５ｍｍ程度に設定されている。 Further, as shown in FIG. 5B, the outer diameter D3 (see FIG. 8A) of the first cylindrical portion 44 is set larger than the inner width (horizontal width) D1 of the first recess 53. Therefore, the first cylindrical portion 44 and the first concave portion 53 interfere with each other by T1 per side. That is, the first cylindrical portion 44 is press-fitted into the first concave portion 53 with an interference T1 (=(D3-D1)/2). An interference T1 between the cylindrical portion 44 and the recess 53 is set to approximately 0.1 to 0.5 mm.

一方、第２の円筒部４５と第２の凹部５４とは、下側でのみ締め代Ｔ２で干渉し、上側には、隙間Ｔ３が形成される。即ち、第２の円筒部４５は、締め代Ｔ２で、第２の凹部５４を下方に押圧する一方、第２の凹部５４の上面からは、隙間Ｔ３だけ逃げている。このため、本実施形態では、第２の円筒部４５の外径Ｄ３´（図８（ｃ）参照）は、第２の凹部５４の内幅（上下幅）Ｄ１´以下に設定されており、第２の円筒部４５は、第２の凹部５４に対して、第２の凹部５４の内幅Ｄ１´と第２の円筒部４５の外径Ｄ３´との差の１／２より大きく下方にオフセットしている。図５（ｂ）中、寸法Ｔ４は、第２の凹部５４の上下方向中間位置と、第２の円筒部４５の中心とのオフセット量（Ｔ４＞（Ｄ１´－Ｄ３´）／２）を表している。また、円筒部４５と凹部５４との締め代Ｔ２は、０．１～０．５ｍｍ程度に設定されている。また、締め代Ｔ２と隙間Ｔ３とは、Ｔ３≧Ｔ２であればよく、Ｔ３はＴ２と同じか僅かに大きい程度が好ましい。
例えば、本実施形態の一例として、潤滑剤供給部材５０の第１の凹部５３には、第１の円筒部４４が締め代Ｔ１＝０．３ｍｍで圧入され、第２の凹部５４には、第２の円筒部４５が締め代Ｔ２＝０．２ｍｍ、隙間Ｔ３＝０．２ｍｍで配置される。 On the other hand, the second cylindrical portion 45 and the second concave portion 54 interfere with each other only on the lower side with an interference T2, and a gap T3 is formed on the upper side. That is, the second cylindrical portion 45 presses the second recessed portion 54 downward with the interference T2, while the second cylindrical portion 45 escapes from the upper surface of the second recessed portion 54 by the gap T3. Therefore, in the present embodiment, the outer diameter D3′ (see FIG. 8C) of the second cylindrical portion 45 is set to be equal to or less than the inner width (vertical width) D1′ of the second recess 54. The second cylindrical portion 45 is positioned below the second concave portion 54 by more than 1/2 of the difference between the inner width D1′ of the second concave portion 54 and the outer diameter D3′ of the second cylindrical portion 45. offset. In FIG. 5B, the dimension T4 represents the offset amount (T4>(D1'-D3')/2) between the vertical intermediate position of the second recess 54 and the center of the second cylindrical portion 45. ing. The interference T2 between the cylindrical portion 45 and the recessed portion 54 is set to approximately 0.1 to 0.5 mm. Moreover, the interference T2 and the clearance T3 should be T3≧T2, and T3 is preferably the same as or slightly larger than T2.
For example, as an example of the present embodiment, the first cylindrical portion 44 is press-fitted into the first concave portion 53 of the lubricant supply member 50 with an interference T1 of 0.3 mm, and the second concave portion 54 has a second No. 2 cylindrical portion 45 is arranged with interference T2=0.2 mm and gap T3=0.2 mm.

なお、第１の円筒部４４は、第１の凹部５３に対して幅方向の押圧力を作用させるが、上下方向への移動は許容され、拘束されない。また、第２の円筒部４５は、第２の凹部５４に対して下方向の押圧力を作用させるが、幅方向への移動は許容され、拘束されない。
また、本実施形態では、第１の円筒部４４及び第２の円筒部４５は、ケース４０の外周壁４１と連続して設けられているため、第１の円筒部４４の外径Ｄ３及び第２の円筒部４５の外径Ｄ３´は、それぞれ対向する円弧面によって与えられるものとする。 Although the first cylindrical portion 44 exerts a pressing force in the width direction on the first concave portion 53, it is allowed to move vertically and is not constrained. Further, the second cylindrical portion 45 exerts a downward pressing force on the second concave portion 54, but is allowed to move in the width direction and is not constrained.
Further, in the present embodiment, since the first cylindrical portion 44 and the second cylindrical portion 45 are provided continuously with the outer peripheral wall 41 of the case 40, the outer diameter D3 of the first cylindrical portion 44 and the The outer diameter D3' of the two cylindrical portions 45 is given by the arcuate surfaces facing each other.

第１の凹部５３に第１の円筒部４４が締め代Ｔ１で圧入されることで、第１の凹部５３には、図７に示すように、第１の凹部５３の内幅を広げる方向（矢印Ａ方向）の押圧力が作用し、この結果、図５（ａ）に示すように、左右方向中央部が上に凸となるように変形し、それに伴って、左右の袖部５５も互いに左右方向に近づくように変形する。
また、第２の円筒部４５が締め代Ｔ２で第２の凹部５４の下面を押圧することで、第２の凹部５４の下面には、第２の凹部５４の内幅を広げる方向（矢印Ｂ方向）の押圧力が作用し、左右の袖部５５の下部は、互いに左右方向に近づくように変形する。 By press-fitting the first cylindrical portion 44 into the first concave portion 53 with the interference T1, the first concave portion 53 expands the inner width of the first concave portion 53 ( As a result, as shown in FIG. 5(a), the central portion in the left-right direction is deformed so as to be convex upward, and along with this, the left and right sleeve portions 55 also move toward each other. Transforms to approach in the left and right direction.
In addition, since the second cylindrical portion 45 presses the lower surface of the second recess 54 with the interference T2, the direction (arrow B direction) acts, and the lower portions of the left and right sleeve portions 55 are deformed so as to approach each other in the left-right direction.

したがって、第１及び第２の円筒部４４、４５と、第１及び第２の凹部５３、５４との干渉によって、潤滑剤供給部材５０の上側の突部５２は、幅方向（矢印Ｃ方向）及び下方（矢印Ｄ方向）に変位して、案内レール２０のレール側軌道面２２を斜め下方に押し付ける。また、潤滑剤供給部材５０の下側の突部５１は、幅方向（矢印Ｃ方向）及び上方（矢印Ｄ方向）に変位して、案内レール２０のレール側軌道面２１を斜め上方に押し付ける。 Therefore, due to the interference between the first and second cylindrical portions 44, 45 and the first and second recesses 53, 54, the upper protrusion 52 of the lubricant supply member 50 moves in the width direction (arrow C direction). and downward (in the direction of arrow D) to press the rail-side raceway surface 22 of the guide rail 20 obliquely downward. Further, the protrusion 51 on the lower side of the lubricant supply member 50 is displaced in the width direction (direction of arrow C) and upward (direction of arrow D) to press the rail-side raceway surface 21 of the guide rail 20 obliquely upward.

従って、潤滑剤供給部材５０の突部５１，５２により、レール側軌道面２１，２２へ潤滑剤が確実に供給される。レール側軌道面２１，２２に対する突部５１，５２の押圧力は、第１及び第２の凹部５３，５４と、第１及び第２の円筒部４４，４５の寸法で調整される。 Therefore, the protrusions 51 and 52 of the lubricant supply member 50 reliably supply the lubricant to the rail-side raceway surfaces 21 and 22 . The pressing force of the protrusions 51 and 52 against the rail-side raceway surfaces 21 and 22 is adjusted by the dimensions of the first and second recesses 53 and 54 and the first and second cylindrical portions 44 and 45 .

図８に示すように、ケース４０において、第１及び第２の円筒部４４，４５の外径Ｄ３、Ｄ３´は、第１及び第２の凹部５３，５４の内幅Ｄ１、Ｄ１´より大きくなっている。従って、潤滑剤供給部材５０をケース４０内に収容すると、第１の円筒部４４と第１の凹部５３との締め代Ｔ１は、となり、第２の円筒部４５と第２の凹部５４との締め代Ｔ２は、（Ｄ３´－Ｄ１´）／２となる。 As shown in FIG. 8, in the case 40, the outer diameters D3, D3' of the first and second cylindrical portions 44, 45 are larger than the inner widths D1, D1' of the first and second recesses 53, 54. It's becoming Therefore, when the lubricant supply member 50 is accommodated in the case 40, the interference T1 between the first cylindrical portion 44 and the first recessed portion 53 is: The interference T2 is (D3'-D1')/2.

このため、第１の凹部５３の平面状の両側面に第１の円筒部４４は締め代Ｔ１で圧入され、第１の凹部５３の接触した部分は、応力を緩和するために潤滑剤を放出し、スライダの幅方向において収縮する。また、第２の凹部５４の平面状の下面を第２の円筒部４５は締め代Ｔ２で押圧するので、第２の凹部５４の接触した部分は、応力を緩和するために潤滑剤を放出し、スライダの上下方向において収縮する。したがって、潤滑剤供給部材５０は、スライダの上下方向及び幅方向においてケース４０に拘束されているので、潤滑剤供給部材５０の姿勢を安定することができる。
このため、第１の凹部５３の平面状の下面及び第２の凹部５４の平面状の側面は、拘束されていないが、第１の凹部５３及び第２の凹部５４の接触した部分により、潤滑剤供給部材５０が収縮した場合でも、潤滑剤供給部材５０の姿勢をさらに安定することができる。 For this reason, the first cylindrical portion 44 is press-fitted into both planar side surfaces of the first recess 53 with an interference T1, and the contact portion of the first recess 53 releases lubricant in order to relieve the stress. and shrinks in the width direction of the slider. In addition, since the second cylindrical portion 45 presses the planar lower surface of the second recess 54 with the interference T2, the contact portion of the second recess 54 releases lubricant to relieve stress. , contract in the vertical direction of the slider. Therefore, since the lubricant supply member 50 is restrained by the case 40 in the vertical direction and the width direction of the slider, the posture of the lubricant supply member 50 can be stabilized.
Therefore, the planar lower surface of the first recess 53 and the planar side surface of the second recess 54 are not constrained, but lubrication is provided by the contact portions of the first recess 53 and the second recess 54 . Even when the lubricant supply member 50 contracts, the posture of the lubricant supply member 50 can be further stabilized.

また、第１の円筒部４４には、図８（ａ）に示すように、円筒部４４の先端側縁部、具体的には、円筒部４４の先端側縁部の幅方向２箇所に、角度ａの面取り部４６が設けられている。このため、円筒部４４の先端側縁部の距離Ｄ２は、第１の凹部５３の内幅Ｄ１より小さくなっているので、第１の円筒部４４を第１の凹部５３に装着しやすい。 In addition, as shown in FIG. 8(a), the first cylindrical portion 44 is provided at two locations in the width direction of the tip side edge of the cylindrical portion 44, specifically, the tip side edge of the cylindrical portion 44. A chamfer 46 of angle a is provided. Therefore, since the distance D2 of the tip side edge of the cylindrical portion 44 is smaller than the inner width D1 of the first recess 53, the first cylindrical portion 44 can be easily attached to the first recess 53. FIG.

また、第２の円筒部４５にも、図８（ｃ）に示すように、円筒部４５の先端側縁部、具体的には、円筒部４５の先端縁部の上下方向２箇所に、角度ａ´の面取り部４６が設けられている。第２の円筒部４５の外径Ｄ３´は、第２の凹部５４の内幅Ｄ１´以下に設定されているが、第２の円筒部４５の下面と、第２の凹部５４との間には締め代Ｔ２が発生しているので、面取り部４６を設けることで、第２の円筒部４５を第２の凹部５４に装着しやすい。なお、円筒部４５の先端側縁部の距離Ｄ２´は、第２の凹部５４の内幅Ｄ１´より小さくなる。 Also, as shown in FIG. 8(c), the second cylindrical portion 45 is also provided with two angles in the top-bottom direction of the tip side edge of the cylindrical portion 45, specifically, the tip edge of the cylindrical portion 45. A chamfered portion 46 of a' is provided. The outer diameter D3′ of the second cylindrical portion 45 is set to be equal to or smaller than the inner width D1′ of the second recess 54, but the gap between the lower surface of the second cylindrical portion 45 and the second recess 54 Since there is an interference T2, the provision of the chamfered portion 46 makes it easy to mount the second cylindrical portion 45 in the second recessed portion 54 . It should be noted that the distance D2' of the tip side edge of the cylindrical portion 45 is smaller than the inner width D1' of the second recess 54. As shown in FIG.

これにより、潤滑剤供給部材５０のケース４０への装着が容易になる。面取り角度ａ、ａ´は、１５～４５°が好ましく、また、面取り量Ｄ３－Ｄ２、Ｄ３´－Ｄ２´は、０．５～２ｍｍ程度とするのが好ましい。
本実施形態のケース４０では、面取り角度ａ、ａ´＝３０°、面取り量Ｄ３－Ｄ２、Ｄ３´－Ｄ２´＝１ｍｍとした。 This facilitates attachment of the lubricant supply member 50 to the case 40 . The chamfering angles a and a' are preferably 15 to 45°, and the chamfering amounts D3-D2 and D3'-D2' are preferably about 0.5 to 2 mm.
In the case 40 of the present embodiment, the chamfering angles a, a'=30° and the chamfering amounts D3-D2, D3'-D2'=1 mm.

また、本実施形態のケース４０は、図５（ａ）に示すように、円筒形の第１の円筒部４４の下面が水平方向に切り欠かれて、平面部４８が設けられている。これにより、案内レール２０の上面２４と第１の円筒部４４の下面である平面部４８との間の距離が大きくなり、上面２４と平面部４８との間に配置される潤滑剤供給部材５０の幅Ｓを広くすることができ、潤滑剤供給部材５０の強度が向上する。また、潤滑剤の含有量を多くしても、潤滑剤供給部材５０の変形や破断の虞が低減し、取り扱いが容易になる。 In addition, as shown in FIG. 5A, the case 40 of the present embodiment has a flat portion 48 formed by horizontally cutting out the lower surface of the cylindrical first cylindrical portion 44 . As a result, the distance between the upper surface 24 of the guide rail 20 and the flat portion 48 that is the lower surface of the first cylindrical portion 44 is increased, and the lubricant supply member 50 disposed between the upper surface 24 and the flat portion 48 is increased. can be increased, and the strength of the lubricant supply member 50 is improved. Moreover, even if the content of the lubricant is increased, the possibility of deformation or breakage of the lubricant supply member 50 is reduced, and the handling is facilitated.

このように構成されたリニアガイド１０では、案内レール２０上をスライダ３０が移動すると、スライダ３０内のボールは、転動体循環路内を繰り返し循環移動する。このとき、潤滑剤供給部材５０の突部５１，５２は、案内レール２０のレール側軌道面２１，２２の一部と摺接し、潤滑剤供給部材５０が含浸する潤滑剤が滲み出して、レール側軌道面２１、２２及びボールに自動的に供給する。これにより、リニアガイド１０は、長期間に亘って安定した滑らかな作動が行われる。 In the linear guide 10 configured as described above, when the slider 30 moves on the guide rail 20, the balls in the slider 30 repeatedly circulate within the rolling element circulation path. At this time, the projections 51 and 52 of the lubricant supply member 50 come into sliding contact with parts of the rail-side raceway surfaces 21 and 22 of the guide rail 20, and the lubricant impregnated in the lubricant supply member 50 oozes out, and The side raceway surfaces 21, 22 and the balls are automatically supplied. As a result, the linear guide 10 can operate stably and smoothly over a long period of time.

また、リニアガイド１０が長期間使用されると、潤滑剤供給部材５０に含浸されている潤滑剤が減少し、図９に示すように、潤滑剤供給部材５０の寸法が、図中破線で示す状態から図中実線で示すようにほぼ均等に小さくなる。 Further, when the linear guide 10 is used for a long period of time, the lubricant impregnated in the lubricant supply member 50 decreases, and as shown in FIG. From the state, it decreases almost uniformly as indicated by the solid line in the drawing.

この寸法変化により、第１の凹部５３の幅寸法、及び第２の凹部５４の上下寸法も小さくなる。第１の凹部５３には第１の円筒部４４が圧入されているので、第１の凹部５３の幅寸法は変化せず、第１の円筒部４４による第１の凹部５３の押圧力が増大する。これにより、左右の袖部５５は互いに左右方向に近づくようにさらに変形するため、第２の凹部５４の上下寸法の収縮と相俟って、第２の凹部５４の上面は第２の円筒部４５に向かって変位しようとする。ただし、本実施形態では、収縮前に設定された、第２の凹部５４の上面と第２の円筒部４５との間の隙間Ｔ３によって、収縮後も、第２の凹部５４の上面と第２の円筒部４５との間は、小さな隙間を維持するか、或いは、小さな締め代で押圧され、また、第２の凹部５４の下面と第２の円筒部４５との間も締め代が確保される。 Due to this dimensional change, the width dimension of the first recess 53 and the vertical dimension of the second recess 54 also become smaller. Since the first cylindrical portion 44 is press-fitted into the first concave portion 53, the width dimension of the first concave portion 53 does not change, and the pressing force of the first cylindrical portion 44 against the first concave portion 53 increases. do. As a result, the left and right sleeve portions 55 are further deformed so as to approach each other in the left-right direction. Try to displace towards 45. However, in the present embodiment, the gap T3 between the upper surface of the second concave portion 54 and the second cylindrical portion 45, which is set before contraction, keeps the upper surface of the second concave portion 54 and the second cylindrical portion 45 even after contraction. A small gap is maintained or pressed with a small interference between the cylindrical portion 45 of the second recess 54 and the interference between the lower surface of the second recess 54 and the second cylindrical portion 45. be.

したがって、潤滑剤供給部材５０が収縮した場合でも、潤滑剤供給部材５０の１／４円弧状の突部５２は、案内レール２０のレール側軌道面２２に接触して、レール側軌道面２２を斜め下方に押圧する力を維持する。また、略半円形の突部５１は、案内レール２０のレール側軌道面２１に接触して、レール側軌道面２１を斜め上方に押圧する力を維持する。即ち、潤滑剤供給部材５０の寸法変化があっても、潤滑剤供給部材５０から潤滑剤が長期に渡って安定して供給される。 Therefore, even when the lubricant supply member 50 contracts, the 1/4 arc-shaped protrusion 52 of the lubricant supply member 50 contacts the rail-side raceway surface 22 of the guide rail 20 and moves the rail-side raceway surface 22. Maintain the force pushing diagonally downward. Further, the substantially semicircular protrusion 51 contacts the rail-side raceway surface 21 of the guide rail 20 and maintains the force that presses the rail-side raceway surface 21 obliquely upward. That is, even if there is a dimensional change in the lubricant supply member 50, the lubricant is stably supplied from the lubricant supply member 50 over a long period of time.

また、潤滑剤供給部材５０の寸法が小さくなると、第２の凹部５４の隅部５４ａにも応力が作用するが、隅部５４ａは曲面形状に形成されているので、該応力集中が緩和される。 Further, when the size of the lubricant supply member 50 is reduced, stress is also applied to the corner 54a of the second recess 54, but since the corner 54a is formed into a curved shape, the stress concentration is alleviated. .

特に、本実施形態の潤滑剤供給部材５０は、潤滑剤の含有量を８５重量％と高く設定したので、潤滑剤の減少量、即ち、寸法変化（減少）も大きくなるので、本発明の効果が顕著となる。 In particular, since the lubricant supply member 50 of the present embodiment has a high lubricant content of 85% by weight, the amount of decrease in the lubricant, that is, the dimensional change (decrease) is also large. becomes conspicuous.

また、図１０は、レール側軌道面と潤滑剤供給部材の突部との接触状態を示す要部拡大図である。本実施形態の潤滑ユニット３３では、レール側軌道面２１，２２と潤滑剤供給部材５０の突部５１，５２との接触領域を、図中、強調線Ｆで示す、ボールとの接触部近傍に限定している。具体的には、潤滑剤供給部材５０の突部５１，５２の半径Ｒ１を、レール側軌道面２１，２２の半径Ｒ２よりも僅かに小さく、半径Ｒ２の９５～９９％としている。或いは、潤滑剤供給部材５０の突部５１，５２に部分的な突起を設けて、該突起のみをレール側軌道面２１，２２に接触させるようにしてもよい。 Moreover, FIG. 10 is an enlarged view of a main portion showing a state of contact between the rail-side raceway surface and the protrusion of the lubricant supply member. In the lubricating unit 33 of this embodiment, the contact areas between the rail-side raceway surfaces 21 and 22 and the protrusions 51 and 52 of the lubricant supply member 50 are located near the contact areas with the balls, which are indicated by the emphasized lines F in the drawing. Limited. Specifically, the radius R1 of the protrusions 51 and 52 of the lubricant supply member 50 is slightly smaller than the radius R2 of the rail-side raceway surfaces 21 and 22, and is 95 to 99% of the radius R2. Alternatively, the protrusions 51 and 52 of the lubricant supply member 50 may be provided with partial protrusions so that only the protrusions are brought into contact with the rail-side raceway surfaces 21 and 22 .

これにより、ボールとの接触部近傍以外の部分は、潤滑剤供給部材５０との間に、０．１～０．５ｍｍ程度の隙間が形成されて接触することがなく、潤滑剤供給部材５０との摺動抵抗が低減されて、駆動用モータの消費エネルギを削減できる。また、レール側軌道面２１，２２との接触部以外の部分は、厳密な寸法管理が不要となるので、潤滑剤供給部材５０の製作が容易になる。なお、略半円形のレール側軌道面２１の下フランクと、ボールと、の間には数十μｍの隙間があり、ボールと接触しないので、この部分も潤滑剤供給部材５０の突部５１，５２と接触しない。 As a result, a gap of about 0.1 to 0.5 mm is formed between the portion other than the vicinity of the contact portion with the ball and the lubricant supply member 50 so as not to come into contact with the lubricant supply member 50. This reduces the sliding resistance of the drive motor, thereby reducing the energy consumption of the drive motor. In addition, the parts other than the contact parts with the rail-side raceway surfaces 21 and 22 do not require strict dimensional control, so that the lubricant supply member 50 can be manufactured easily. There is a gap of several tens of micrometers between the lower flank of the substantially semicircular rail-side raceway surface 21 and the ball, and since this part does not come into contact with the ball, this portion also No contact with 52.

以上説明したように、本実施形態のリニアガイド１０によれば、潤滑剤を含浸可能な潤滑剤供給部材５０を有し、スライダ３０の軸方向の端部に取り付けられた潤滑ユニット３３を備える。そして、潤滑剤供給部材５０は、案内レール２０の上方位置に形成された第１の凹部５３と、案内レール２０の左右両側面位置に形成された一対の第２の凹部５４と、レール側軌道面２１，２２に摺接可能な突部５１，５２と、を備える。また、潤滑ユニット３３は、第１の凹部５３のスライダ３０の上下方向への移動を許容し、第１の凹部５３をスライダ３０の幅方向外方に押圧するように、第１の凹部５３内に配置される第１の円筒部４４と、一対の第２の凹部５４のスライダ３０の幅方向への移動を許容し、一対の第２の凹部５４をスライダ３０の下方向にそれぞれ押圧するように、一対の第２の凹部５４内に配置される一対の第２の円筒部４５と、を備える。これにより、長期間の使用に伴って含浸した潤滑剤量が少なくなり、潤滑剤供給部材５０の寸法が小さくなっても、第１の凹部５３が、第１の円筒部４４によりスライダ３０の幅方向外方に押圧され、また、一対の第２の凹部５４が、一対の第２の円筒部４５によりスライダ３０の下方向にそれぞれ押圧されているので、潤滑剤供給部材５０の突部５１，５２が、レール側軌道面２１，２２を押し付ける力が確保され、長期間に亘って潤滑剤の供給が維持される。 As described above, according to the linear guide 10 of the present embodiment, the lubricating unit 33 has the lubricant supply member 50 that can be impregnated with lubricant and is attached to the axial end of the slider 30 . The lubricant supply member 50 includes a first recess 53 formed above the guide rail 20, a pair of second recesses 54 formed on both left and right sides of the guide rail 20, and a rail-side track. Protrusions 51 and 52 slidable on the surfaces 21 and 22 are provided. In addition, the lubricating unit 33 allows the slider 30 to move in the vertical direction of the first concave portion 53 , and presses the first concave portion 53 outward in the width direction of the slider 30 . The first cylindrical portion 44 and the pair of second recesses 54 are allowed to move in the width direction of the slider 30, and the pair of second recesses 54 are pressed downward of the slider 30, respectively. and a pair of second cylindrical portions 45 arranged in the pair of second recesses 54 . As a result, even if the amount of the impregnated lubricant decreases with long-term use and the dimensions of the lubricant supply member 50 become smaller, the first concave portion 53 will still be the width of the slider 30 by the first cylindrical portion 44 . Since the pair of second concave portions 54 are pressed downward of the slider 30 by the pair of second cylindrical portions 45, the protrusions 51, 51 of the lubricant supply member 50 52 secures the force to press the rail-side raceway surfaces 21 and 22, and the supply of lubricant is maintained over a long period of time.

また、潤滑ユニット３３は、潤滑剤供給部材５０と、潤滑剤供給部材５０を収容するケース４０と、を備え、第１の円筒部４４、及び一対の第２の円筒部４５は、ケース４０の内部に設けられるので、ケース４０と円筒部４４，４５とを別部品で構成する場合と比較して、部品点数を削減でき、また、潤滑剤供給部材５０を保護することができる。 Further, the lubrication unit 33 includes a lubricant supply member 50 and a case 40 that houses the lubricant supply member 50. A first cylindrical portion 44 and a pair of second cylindrical portions 45 are provided in the case 40. Since it is provided inside, the number of parts can be reduced and the lubricant supply member 50 can be protected, as compared with the case where the case 40 and the cylindrical portions 44 and 45 are formed by separate parts.

また、第１の円筒部４４の外径Ｄ３は、第１の凹部５３の幅Ｄ１より大きいので、円筒部４４により第１の凹部５３を、幅方向に押圧することができる。
また、一対の第２の円筒部４５の外径Ｄ３´は、一対の第２の凹部５４の幅Ｄ１´より大きく、第２の円筒部３４は、第２の凹部５４に対して、第２の凹部５４の幅Ｄ１´と第２の円筒部４５の外径Ｄ３´との差の１／２より大きく下方にオフセットしているので、一対の第２の円筒部４５により一対の第２の凹部５４を、下方向に押圧することができる。 Moreover, since the outer diameter D3 of the first cylindrical portion 44 is larger than the width D1 of the first recess 53, the first recess 53 can be pressed by the cylindrical portion 44 in the width direction.
Further, the outer diameter D3' of the pair of second cylindrical portions 45 is larger than the width D1' of the pair of second recesses 54, and the second cylindrical portion 34 is larger than the second recesses 54 by the second width. 1/2 of the difference between the width D1' of the concave portion 54 and the outer diameter D3' of the second cylindrical portion 45. The recess 54 can be pressed downward.

また、第１の円筒部４４、及び一対の第２の円筒部４５の先端側縁部には、面取り部４６が設けられているので、第１の円筒部４４、及び一対の第２の円筒部４５を、容易に第１の凹部５３及び一対の第２の凹部５４に組み込むことができる。 In addition, since the chamfered portion 46 is provided at the tip side edge portion of the first cylindrical portion 44 and the pair of second cylindrical portions 45, the first cylindrical portion 44 and the pair of second cylindrical portions 45 are The portion 45 can be easily incorporated into the first recess 53 and the pair of second recesses 54 .

また、潤滑剤供給部材５０は、７０重量％以上の潤滑剤を含浸するので、長期間に亘って潤滑剤を安定して供給できる。 Moreover, since the lubricant supply member 50 is impregnated with 70% by weight or more of the lubricant, the lubricant can be stably supplied over a long period of time.

また、第１の円筒部４４の下面は、水平方向に切り欠かれた平面部４８を有するので、案内レール２０の上面２４と平面部４８との間に配置される潤滑剤供給部材５０の幅Ｓを広くすることができ、潤滑剤供給部材５０の強度を向上することができる。 Further, since the lower surface of the first cylindrical portion 44 has a horizontally cut flat portion 48, the width of the lubricant supply member 50 arranged between the upper surface 24 of the guide rail 20 and the flat portion 48 is S can be widened, and the strength of the lubricant supply member 50 can be improved.

（第２実施形態）
図１１は、第２実施形態の潤滑ユニットの潤滑剤供給部材及びケースの斜視図、図１２は、潤滑剤供給部材及びケースの分解斜視図である。本実施形態の潤滑ユニット３３Ａでは、第１実施形態のケース４０の代わりに、押圧プレート４０Ａが用いられている。それ以外の部分は、第１実施形態の潤滑ユニット３３と同様であるので、同一部分には同一符号又は相当符号を付して説明を簡略化又は省略する。 (Second embodiment)
11 is a perspective view of the lubricant supply member and case of the lubrication unit of the second embodiment, and FIG. 12 is an exploded perspective view of the lubricant supply member and case. In the lubricating unit 33A of this embodiment, a pressing plate 40A is used instead of the case 40 of the first embodiment. Other parts are the same as those of the lubricating unit 33 of the first embodiment, so the same parts are denoted by the same reference numerals or equivalent reference numerals, and the description thereof is simplified or omitted.

本実施形態の押圧プレート４０Ａも、ポリアセタールやポリアミドなどの硬質樹脂を射出成形して製作されており、エンドキャップ３２と略同一サイズの略コ字状に形成されている。なお、押圧プレート４０Ａは、鋼、アルミニウムなどの金属材料を、切削加工やプレス加工して制作したものであってもよい。 The pressing plate 40A of this embodiment is also manufactured by injection molding a hard resin such as polyacetal or polyamide, and is formed in a substantially U-shape having substantially the same size as the end cap 32 . The pressing plate 40A may be produced by cutting or pressing a metal material such as steel or aluminum.

本実施形態の押圧プレート４０Ａは、第１実施形態のケース４０が備える外周壁４１を有しておらず、エンドキャップ３２と略同一サイズの略コ字状に形成され板部４２Ａと、潤滑剤供給部材５０の第１及び第２の凹部５３，５４に対応する位置に、板部４２Ａから突出形成された上部押圧手段である第１の円筒部４４と、側面押圧手段である一対の第２の円筒部４５と、から構成されている。 The pressing plate 40A of the present embodiment does not have the outer peripheral wall 41 provided in the case 40 of the first embodiment, and has a substantially U-shaped plate portion 42A having substantially the same size as the end cap 32, and a lubricant. At positions corresponding to the first and second concave portions 53 and 54 of the supply member 50, a first cylindrical portion 44 as upper pressing means and a pair of second cylindrical portions 44 as side pressing means are projected from the plate portion 42A. and a cylindrical portion 45 of

潤滑剤供給部材５０は、第１及び第２の凹部５３，５４に、それぞれ第１及び第２の円筒部４４，４５を嵌め込み、板部４２Ａに密着させて組み付けられる。本実施形態の潤滑ユニット３３Ａによると、外周壁４１の分だけ潤滑剤供給部材５０の体積を増加させることができ、潤滑剤供給部材５０は、より多くの潤滑剤を保持できる。
その他の構成及び作用については、第１実施形態のものと同様である。 The lubricant supply member 50 is assembled by fitting the first and second cylindrical portions 44 and 45 into the first and second concave portions 53 and 54, respectively, and bringing them into close contact with the plate portion 42A. According to the lubrication unit 33A of this embodiment, the volume of the lubricant supply member 50 can be increased by the outer peripheral wall 41, and the lubricant supply member 50 can hold more lubricant.
Other configurations and actions are the same as those of the first embodiment.

尚、本発明は、前述した各実施形態に限定されるものではなく、適宜、変形、改良、等が可能である。
例えば、図１３に示す変形例のように、円筒形の第２の円筒部４５の幅方向側面が鉛直方向に切り欠かれて、平面部４９が設けられてもよい。これにより、案内レール２０の側面２３と第２の円筒部４５の平面部４９との間の距離が大きくなり、側面２３と平面部４９との間に配置される潤滑剤供給部材５０の幅Ｔを広くすることができ、潤滑剤供給部材５０の強度がさらに向上する。これにより、潤滑剤の含有量を多くしても、潤滑剤供給部材５０の変形や破断の虞が低減し、取り扱いが容易になる。 It should be noted that the present invention is not limited to the above-described embodiments, and can be modified, improved, etc. as appropriate.
For example, as in a modified example shown in FIG. 13 , a flat portion 49 may be provided by cutting out the width direction side surface of the cylindrical second cylindrical portion 45 in the vertical direction. As a result, the distance between the side surface 23 of the guide rail 20 and the flat surface portion 49 of the second cylindrical portion 45 increases, and the width T of the lubricant supply member 50 arranged between the side surface 23 and the flat surface portion 49 increases. can be widened, and the strength of the lubricant supply member 50 is further improved. As a result, even if the content of the lubricant is increased, the possibility of deformation or breakage of the lubricant supply member 50 is reduced, and handling is facilitated.

また、図１４に示す他の変形例のように、第１の円筒部４４の幅方向両側面に、鉛直方向に沿って切り欠かれた他の平面部４４ａが形成されてもよく、また、第２の円筒部４５の上下方向両側面に、水平方向に沿って切り欠かれた他の平面部４５ａが形成されてもよい。これにより、潤滑剤供給部材５０が収縮した場合でも、潤滑剤供給部材５０の姿勢を安定させることができる。
なお、図１３及び図１４に示す構成は、第１及び第２実施形態のいずれにも適用できるものであり、また、両方を組み合わせて適用することもできる。 Further, as in another modification shown in FIG. 14, other plane portions 44a may be formed by notching along the vertical direction on both side surfaces in the width direction of the first cylindrical portion 44, and Other plane portions 45a may be formed by notching along the horizontal direction on both side surfaces in the vertical direction of the second cylindrical portion 45 . As a result, even when the lubricant supply member 50 contracts, the posture of the lubricant supply member 50 can be stabilized.
The configurations shown in FIGS. 13 and 14 can be applied to both the first and second embodiments, and can also be applied in combination.

１０リニアガイド
２０案内レール
２１，２２レール側軌道面
３０スライダ
３３，３３Ａ潤滑ユニット
４０ケース
４０Ａ押圧プレート
４４第１の円筒部（上部押圧手段）
４５第２の円筒部（側面押圧手段）
４６面取り部
５０潤滑剤供給部材
５１，５２突部
５３第１の凹部
５４第２の凹部
Ｄ１、Ｄ１´ 内幅（第１の凹部の左右幅、第２の凹部の上下幅）
Ｄ３、Ｄ３´ 外径 10 linear guide 20 guide rails 21, 22 rail-side raceway surface 30 sliders 33, 33A lubrication unit 40 case 40A pressing plate 44 first cylindrical portion (upper pressing means)
45 Second cylindrical portion (side pressing means)
46 Chamfered portion 50 Lubricant supply members 51, 52 Projection 53 First recess 54 Second recess D1, D1' Inner width (horizontal width of first recess, vertical width of second recess)
D3, D3' outer diameter

Claims

a lubrication unit having a guide rail, a slider slidably engaged so as to straddle the guide rail, and a lubricant supply member capable of being impregnated with a lubricant, and attached to an axial end of the slider; A linear guide comprising
The lubricant supply member includes a first recess formed above the guide rail, a pair of second recesses formed on both left and right side surfaces of the guide rail, and a rail-side track of the guide rail. and a projection that can slide on the surface,
The lubrication unit is
Upper pressing means arranged in the first recess to allow the slider to move in the vertical direction of the first recess and to press the first recess outward in the width direction of the slider. When,
Disposed within the pair of second recesses so as to allow the pair of second recesses to move in the width direction of the slider and press the pair of second recesses downward of the slider. a pair of lateral pressing means;
A linear guide comprising:

The lubrication unit includes the lubricant supply member and a case that houses the lubricant supply member,
2. A linear guide according to claim 1, wherein said upper pressing means and said pair of side pressing means are provided inside said case.

The upper pressing means is a first cylindrical portion having an outer diameter larger than the width of the first recess,
The pair of side pressing means is a second cylindrical portion having an outer diameter equal to or less than the width of the pair of second recesses,
The second cylindrical portion is offset downward with respect to the second concave portion by more than 1/2 of the difference between the width of the second concave portion and the outer diameter of the second cylindrical portion. The linear guide according to claim 1 or 2, characterized by:

4. The apparatus according to claim 3, wherein chamfered portions are provided on tip side edge portions of said first and second cylindrical portions constituting said upper pressing means and said pair of side pressing means. Linear guide.

The linear guide according to any one of claims 1 to 4, wherein the lower surface of said upper pressing means has a flat portion notched in the horizontal direction.

The linear guide according to any one of claims 1 to 5, characterized in that the width direction side surface of said side pressing means has a flat portion notched in the vertical direction.