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JP4712662B2 - MOTION GUIDE DEVICE AND MOTION GUIDE DEVICE INSTALLATION METHOD - Google Patents

MOTION GUIDE DEVICE AND MOTION GUIDE DEVICE INSTALLATION METHOD Download PDF

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JP4712662B2
JP4712662B2 JP2006263320A JP2006263320A JP4712662B2 JP 4712662 B2 JP4712662 B2 JP 4712662B2 JP 2006263320 A JP2006263320 A JP 2006263320A JP 2006263320 A JP2006263320 A JP 2006263320A JP 4712662 B2 JP4712662 B2 JP 4712662B2
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track rail
rolling element
rolling
moving block
leg member
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JP2008082446A (en
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廣昭 望月
修 輿石
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THK Co Ltd
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THK Co Ltd
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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
    • F16C29/005—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
    • F16C29/00—Bearings for parts moving only linearly
    • F16C29/004—Fixing of a carriage or rail, e.g. rigid mounting to a support structure or a movable part
    • 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
    • F16C29/0638—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 balls
    • F16C29/064—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 balls with two rows of balls, one on each side of the rail

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bearings For Parts Moving Linearly (AREA)

Description

本発明は、移動体が直線運動又は曲線運動するのを案内する運動案内装置に関する。   The present invention relates to a motion guide device for guiding a moving body to perform a linear motion or a curved motion.

リニアガイド等の運動案内装置は、移動体が直線運動又は曲線運動するのを案内する。案内機構に転動体を介在させた転がり型の運動案内装置は、すべり型の運動案内装置よりも軽快な動きが得られるという利点があるので、工作機械、半導体・液晶製造装置、ロボット等、幅広い分野で多用されている（例えば特許文献１参照）。   A motion guide device such as a linear guide guides the moving body to perform a linear motion or a curved motion. Rolling-type motion guide devices with rolling elements in the guide mechanism have the advantage that lighter movements can be obtained than slide-type motion guide devices, so a wide range of machine tools, semiconductor / liquid crystal manufacturing devices, robots, etc. Widely used in the field (see, for example, Patent Document 1).

運動案内装置においては、軌道レールをベース等の相手部品に精度良く取り付ける必要がある。軌道レールの取付け精度が悪いと、軌道レールと移動ブロックとの間に介在される転動体に過大な負荷がかかるからである。軌道レールの相手部品への取付け方法は、例えば以下の工程を経る。まず、図１３Ａに示されるように、相手部品３０の取付け面に基準面となる突き当て３１を形成する。次に、図１３Ｂに示されるように、押しねじ３２により軌道レール３３を突き当て３１に密着させる。その状態で、図１３Ｃに示されるように、軌道レール３３の取付け孔３４に取付けボルト３６を挿入し、トルクレンチ３５を使用して取付けボルト３６を規定トルクで締め付ける。軌道レール３３には、あらかじめ上面から底面に貫通する取付け孔３４が空けられる。この取付け孔３４には、取付けボルト３６の頭が当たる部分だけを平らに仕上げる座ぐりの加工が施される。そして、取付けボルト３６を軌道レール３３の座ぐり孔に挿入して、取付けボルト３６を相手部品３０に締結することで、軌道レール３３が相手部品３０に結合される。   In the motion guide device, it is necessary to attach the track rail to a mating part such as a base with high accuracy. This is because if the mounting accuracy of the track rail is poor, an excessive load is applied to the rolling elements interposed between the track rail and the moving block. The method of attaching the track rail to the mating part includes, for example, the following steps. First, as shown in FIG. 13A, an abutment 31 serving as a reference surface is formed on the mounting surface of the counterpart component 30. Next, as shown in FIG. 13B, the track rail 33 is brought into close contact with the abutment 31 by the push screw 32. In this state, as shown in FIG. 13C, the mounting bolt 36 is inserted into the mounting hole 34 of the track rail 33, and the mounting bolt 36 is tightened to the specified torque using the torque wrench 35. A mounting hole 34 penetrating from the upper surface to the bottom surface is previously formed in the track rail 33. The mounting hole 34 is subjected to a counterbore process for flattening only the portion of the mounting bolt 36 that contacts the head. Then, the track rail 33 is coupled to the mating component 30 by inserting the mounting bolt 36 into the counterbore of the track rail 33 and fastening the mounting bolt 36 to the mating component 30.

特開２００５−１１４０３４号公報（１頁参照）Japanese Patent Laying-Open No. 2005-114034 (see page 1)

しかし近年では、自動車、航空機などの輸送機器の分野にまで運動案内装置が応用されている。例えば、自動車のモジュール部品の案内機構に運動案内装置が用いられている。自動車、航空機などの輸送機器の分野においては、運動案内装置の軌道レールが取り付けられる相手部品が板金製のときもあるから、取付け面の精度がラフになり易い。しかも、これらの分野においては、運動案内装置の使用環境が厳しく、温度変化も激しいので、軌道レールや相手部品の熱変形量も大きくなる。   However, in recent years, motion guide devices have been applied to the field of transportation equipment such as automobiles and airplanes. For example, a motion guide device is used as a guide mechanism for module parts of an automobile. In the field of transportation equipment such as automobiles and airplanes, the mating part to which the track rail of the motion guide device is attached is sometimes made of sheet metal, so the accuracy of the attachment surface tends to be rough. In addition, in these fields, the use environment of the motion guide device is severe and the temperature changes drastically, so that the amount of thermal deformation of the track rail and the counterpart component also increases.

取付け面の精度がラフでかつ熱変形量も大きい相手部品に軌道レールを取り付けると、相手部品のミスアライメント（取付け面の精度のラフさや熱変形量）がそのまま軌道レールのミスアライメントとなって表れる。この場合、軌道レールと移動ブロックとの間に介在される転動体が皺寄せを受け、転動体に過大な負荷がかかってしまう。   When a track rail is attached to a mating part with a rough mounting surface and large thermal deformation, the misalignment of the mating part (roughness of the mounting surface and the amount of thermal deformation) appears directly as a misalignment of the rail. . In this case, the rolling elements interposed between the track rail and the moving block are subjected to rushing and an excessive load is applied to the rolling elements.

さらに、ボルトを軌道レールの座ぐり孔にボルトを挿入し、ボルトを相手部品に締結する従来の取付け方法は、手間や時間がかかるので、大量生産される自動車のモジュール部品には適さない。   Furthermore, the conventional mounting method in which the bolt is inserted into the counterbore of the track rail and the bolt is fastened to the mating part is time consuming and time consuming, and thus is not suitable for a module part of an automobile that is mass-produced.

そこで本発明は、軌道レールが取り付けられる相手部品のミスアライメントを吸収することができ、また取付けも簡略化することができる運動案内装置及びその取付け方法を提供することを目的とする。   SUMMARY OF THE INVENTION An object of the present invention is to provide a motion guide device that can absorb misalignment of a mating part to which a track rail is attached and can simplify the attachment, and an attachment method thereof.

以下、本発明について説明する。   The present invention will be described below.

上記課題を解決するために、請求項１に記載の発明は、長手方向に伸びる転動体転走溝が形成される軌道レールと、前記軌道レールの前記転動体転走溝に対向する負荷転動体転走溝が形成される移動ブロックと、前記移動ブロックの前記負荷転動体転走溝を含む転動体循環経路に収容される複数の転動体と、を備える運動案内装置において、前記軌道レールの、前記移動ブロックが移動するのを妨げない位置に、前記軌道レールの長手方向に交差する方向に突出する脚部材を設け、前記脚部材を利用して前記軌道レールを相手部品に取り付けることができ、前記軌道レールは、前記脚部材が設けられる底面、上面及び前記転動体転走溝が形成される左右一対の側面と、を有し、前記移動ブロックは、その全体が鞍形状に形成され、前記軌道レールの上面に対向する中央部と、前記中央部の幅方向の両端部に設けられ、前記軌道レールの左右側面に対向する一対の側壁部と、を有し、前記転動体は、ボールであり、そして、前記軌道レールの長手方向と直交する方向の断面において、前記軌道レールの左右側面に形成される左右の前記転動体転走溝間の距離の最小値が、前記ボールの直径よりも小さい運動案内装置である。 In order to solve the above-mentioned problems, the invention according to claim 1 includes a track rail in which rolling element rolling grooves extending in the longitudinal direction are formed, and a load rolling element facing the rolling element rolling grooves of the track rail. A motion guide apparatus comprising: a moving block in which a rolling groove is formed; and a plurality of rolling elements accommodated in a rolling element circulation path including the loaded rolling element rolling groove of the moving block. A leg member that protrudes in a direction intersecting the longitudinal direction of the track rail is provided at a position that does not prevent the moving block from moving, and the track rail can be attached to a counterpart part using the leg member, The track rail has a bottom surface on which the leg member is provided, an upper surface and a pair of left and right side surfaces on which the rolling element rolling grooves are formed, and the moving block is formed in a bowl shape as a whole, Orbital A center portion facing the top surface of the rail, and a pair of side wall portions provided at both ends in the width direction of the center portion and facing the left and right side surfaces of the track rail, and the rolling element is a ball And, in the cross section in the direction orthogonal to the longitudinal direction of the track rail, the minimum value of the distance between the left and right rolling element rolling grooves formed on the left and right side surfaces of the track rail is smaller than the diameter of the ball. It is a motion guide device.

請求項２に記載の発明は、長手方向に伸びる転動体転走溝が形成される軌道レールと、前記軌道レールの前記転動体転走溝に対向する負荷転動体転走溝が形成される移動ブロックと、前記移動ブロックの前記負荷転動体転走溝を含む転動体循環経路に収容される複数の転動体と、を備える運動案内装置において、前記軌道レールの、前記移動ブロックが移動するのを妨げない位置に、前記軌道レールの長手方向に交差する方向に突出する脚部材を設け、前記脚部材を利用して前記軌道レールを相手部品に取り付けることができ、前記軌道レールには、軌道レールの長手方向に伸びる断面円弧形状の肉盛部が設けられ、前記脚部材は、前記軌道レールの前記肉盛部にプロジェクション溶接もしくは摩擦溶接される運動案内装置である。 According to a second aspect of the present invention, there is provided a track rail in which rolling element rolling grooves extending in the longitudinal direction are formed, and a movement in which a load rolling element rolling groove facing the rolling element rolling grooves of the track rail is formed. In a motion guide device comprising a block and a plurality of rolling elements accommodated in a rolling element circulation path including the load rolling element rolling groove of the moving block, the moving block of the track rail moves. A leg member that protrudes in a direction intersecting the longitudinal direction of the track rail is provided at a position that does not obstruct, and the track rail can be attached to a mating part using the leg member. A build-up portion having an arc-shaped cross section extending in the longitudinal direction is provided, and the leg member is a motion guide device that is projection welded or friction welded to the build-up portion of the track rail.

請求項３に記載の発明は、長手方向に伸びる転動体転走溝が形成される軌道レールと、前記軌道レールの前記転動体転走溝に対向する負荷転動体転走溝が形成される移動ブロックと、前記移動ブロックの前記負荷転動体転走溝を含む転動体循環経路に収容される複数の転動体と、を備える運動案内装置において、前記軌道レールの、前記移動ブロックが移動するのを妨げない位置に、前記軌道レールの長手方向に交差する方向に突出する脚部材を設け、前記脚部材を利用して前記軌道レールを相手部品に取り付けることができ、前記軌道レールの、前記脚部材が取り付けられる底面が平坦面に形成され、球面状の端部を有する前記脚部材が、前記軌道レールの前記底面にプロジェクション溶接もしくは摩擦溶接される運動案内装置である。 According to a third aspect of the present invention, there is provided a track rail in which rolling element rolling grooves extending in the longitudinal direction are formed, and a movement in which a load rolling element rolling groove facing the rolling element rolling grooves of the track rail is formed. In a motion guide device comprising a block and a plurality of rolling elements accommodated in a rolling element circulation path including the load rolling element rolling groove of the moving block, the moving block of the track rail moves. A leg member that protrudes in a direction intersecting with the longitudinal direction of the track rail is provided at a position that does not interfere, and the track rail can be attached to a counterpart component using the leg member. Is a motion guide device in which the leg member having a spherical end is formed by a flat surface and projection welding or friction welding is performed on the bottom surface of the track rail.

請求項１に記載の発明によれば、軌道レールの長手方向と直交する方向の断面において、軌道レールの左右側面に形成される左右の転動体転走溝間の距離の最小値がボールの直径よりも小さいので、ボールの剛性に対してレールの剛性を相対的に低減することができる。レール自体が撓み易くなるので、レール部分で相手部品のミスアライメントを吸収することができる。また、転動体の径を相対的に大きくすることができるので、転動体部分でも相手部品のミスアライメントの吸収量を大きくすることができる。 According to the first aspect of the present invention, in the cross section in the direction orthogonal to the longitudinal direction of the track rail, the minimum value of the distance between the left and right rolling element rolling grooves formed on the left and right side surfaces of the track rail is the ball diameter. Therefore, the rigidity of the rail can be reduced relative to the rigidity of the ball. Since the rail itself is easily bent, misalignment of the counterpart component can be absorbed by the rail portion. Further, since the diameter of the rolling element can be made relatively large, the misalignment absorption amount of the mating part can be increased even at the rolling element portion.

請求項２に記載の発明によれば、軌道レールの肉盛部と脚部材とが線接触するので、プロジェクション溶接をする際の抵抗が大きくなり、容易に熱を発生させることができる。 According to the second aspect of the present invention, since the build-up portion of the track rail and the leg member are in line contact, resistance during projection welding is increased, and heat can be easily generated.

請求項３に記載の発明によれば、軌道レールの底面と脚部材とが線接触もしくは点接触するので、プロジェクション溶接をする際の抵抗が大きくなり、容易に熱を発生させることができる。 According to the third aspect of the present invention, since the bottom surface of the track rail and the leg member are in line contact or point contact, resistance during projection welding is increased, and heat can be easily generated.

図１ないし図３は、本発明の一実施形態における運動案内装置を示す。図１は運動案内装置の斜視図、図２は平面図、図３は側面図である。この実施形態の運動案内装置は、ボールの転がり運動によって移動体が軌道レールに沿って直線運動するのを案内する。図１ないし図３に示されるように、運動案内装置は、直線状に細長く延びる軌道レール１と、この軌道レール１に沿ってスライド可能に組み付けられる鞍形状の移動ブロック２と、を備える。軌道レール１と移動ブロック２との間には、転動体として転がり運動可能に多数のボール３が介在される（図４参照）。   1 to 3 show a motion guide apparatus according to an embodiment of the present invention. 1 is a perspective view of the motion guide device, FIG. 2 is a plan view, and FIG. 3 is a side view. The motion guide device of this embodiment guides the moving body to linearly move along the track rail by the rolling motion of the ball. As shown in FIG. 1 to FIG. 3, the motion guide device includes a track rail 1 that extends in a straight line and a hook-shaped moving block 2 that is slidably assembled along the track rail 1. A large number of balls 3 are interposed between the track rail 1 and the moving block 2 as rolling elements so as to be able to roll (see FIG. 4).

図１に示されるように、軌道レール１は、脚部材が固定される底面１ａ、上面１ｂ及び左右一対の側面１ｃを有する。軌道レール１の上面１ｂ及び左右一対の側面１ｃは、鞍形状の移動ブロック２に囲まれている。軌道レール１の左右一対の側面１ｃそれぞれには、転動体転走溝として長手方向に伸びる一条のボール転走溝４が形成される。ボール転走溝４の断面形状は、単一の円弧からなるサーキュラーアーク溝形状である。サーキュラーアーク溝形状の半径はボール３の半径よりも僅かに大きい。   As shown in FIG. 1, the track rail 1 has a bottom surface 1a to which a leg member is fixed, a top surface 1b, and a pair of left and right side surfaces 1c. An upper surface 1 b and a pair of left and right side surfaces 1 c of the track rail 1 are surrounded by a bowl-shaped moving block 2. On each of the pair of left and right side surfaces 1c of the track rail 1, a single ball rolling groove 4 extending in the longitudinal direction as a rolling element rolling groove is formed. The cross-sectional shape of the ball rolling groove 4 is a circular arc groove shape composed of a single arc. The radius of the circular arc groove shape is slightly larger than the radius of the ball 3.

移動ブロック２は、全体が鞍形状に形成されて、軌道レール１の上面に対向する中央部２ａと、中央部２ａの幅方向の両端部から下方に延び、軌道レール１の左右の側面１ｃに対向する側壁部２ｂとを有する。また、移動ブロック２の移動方向の両端部には、蓋部材としてのエンドプレート５が設けられる。   The moving block 2 is formed in a bowl shape as a whole and extends downward from the center portion 2a facing the top surface of the track rail 1 and both widthwise ends of the center portion 2a. And opposing side wall portions 2b. Further, end plates 5 as lid members are provided at both ends of the moving block 2 in the moving direction.

図４は、運動案内装置の軌道レール１と直交する方向の断面図を示す。移動ブロック２には、軌道レール１のボール転走溝４に対向する負荷転動体転走溝として負荷ボール転走溝７が形成されると共に、負荷ボール転走溝７に平行に伸びるボール戻し通路８が形成される。負荷ボール転走溝７も軌道レール１のボール転走溝４と同様に、単一の円弧からなるサーキュラーアーク溝形状に形成される。   FIG. 4 shows a cross-sectional view in a direction orthogonal to the track rail 1 of the motion guide device. In the moving block 2, a load ball rolling groove 7 is formed as a load rolling element rolling groove facing the ball rolling groove 4 of the track rail 1, and a ball return passage extending parallel to the load ball rolling groove 7. 8 is formed. Similarly to the ball rolling groove 4 of the track rail 1, the loaded ball rolling groove 7 is also formed in a circular arc groove shape composed of a single arc.

図５は、移動ブロック２の進行方向に沿った断面図を示す。移動ブロック２は、上記負荷ボール転走溝７及びボール戻し通路８が形成される移動ブロック本体９と、移動ブロック本体９の進行方向の両端に取り付けられる一対のエンドプレート５とで構成される。この図５には、移動ブロック本体９の一端側のエンドプレート５が取り外された状態が示されている。移動ブロック本体９の端面には、負荷ボール転走溝７とボール戻し通路８とを接続するＵ字状の方向転換路の内周側を構成するＲピース部１０が一体に設けられる。移動ブロック本体９の両端に取り付けられるエンドプレート５には、図６の正面図に示されるように、方向転換路の外周側１１が形成される。負荷ボール転走溝７、ボール戻し通路８、及びＵ字状の方向転換路によって、サーキット状のボール循環経路が構成される。ボール循環経路には、多数のボール３が配列・収容される。ボール３間には、ボール３同士の接触を防止するためのスペーサが介在されてもよい。   FIG. 5 shows a cross-sectional view of the moving block 2 along the traveling direction. The moving block 2 includes a moving block main body 9 in which the load ball rolling groove 7 and the ball return passage 8 are formed, and a pair of end plates 5 attached to both ends of the moving block main body 9 in the moving direction. FIG. 5 shows a state in which the end plate 5 on one end side of the moving block body 9 is removed. An R piece portion 10 constituting an inner peripheral side of a U-shaped direction changing path connecting the loaded ball rolling groove 7 and the ball return passage 8 is integrally provided on the end surface of the moving block main body 9. As shown in the front view of FIG. 6, the outer peripheral side 11 of the direction changing path is formed on the end plates 5 attached to both ends of the moving block main body 9. A circuit-shaped ball circulation path is constituted by the loaded ball rolling groove 7, the ball return path 8, and the U-shaped direction change path. A large number of balls 3 are arranged and accommodated in the ball circulation path. A spacer for preventing contact between the balls 3 may be interposed between the balls 3.

図１及び図５に示されるように、移動ブロック本体９はその進行方向に二分割（分割面が進行方向と直交する）されている。そして、二分割された分割ピース１６の間には板状の中間ゴム１７が挟まれている。一方の分割ピース１６と中間ゴム１７とは接着等の結合手段により結合され、他方の分割ピース１６と中間ゴム１７とも接着等の結合手段により結合される。しかし、一方の分割ピース１６と他方の分割ピース１６とは結合されていない。それゆえ、一方の分割ピース１６は他方の分割ピース１６に対して、軌道レール１の長手方向と直交する方向に僅かに変位できる。このとき、二つの分割ピース１６間に介在される中間ゴム１７はせん断変形する。二つの分割ピース１６それぞれには、テーブル等の移動体に結合するための取付けねじ１８が加工される。   As shown in FIGS. 1 and 5, the moving block main body 9 is divided into two in the moving direction (the dividing plane is orthogonal to the moving direction). A plate-shaped intermediate rubber 17 is sandwiched between the two divided pieces 16. One divided piece 16 and the intermediate rubber 17 are coupled by a coupling means such as adhesion, and the other divided piece 16 and the intermediate rubber 17 are also coupled by a coupling means such as adhesion. However, one divided piece 16 and the other divided piece 16 are not joined. Therefore, one divided piece 16 can be slightly displaced in the direction perpendicular to the longitudinal direction of the track rail 1 with respect to the other divided piece 16. At this time, the intermediate rubber 17 interposed between the two divided pieces 16 undergoes shear deformation. Each of the two divided pieces 16 is processed with a mounting screw 18 for coupling to a moving body such as a table.

軌道レール１に対して移動ブロック２を相対的に軸方向に移動させると、ボール３が負荷転走路で荷重を受けながら転がり運動する。負荷ボール転走溝７の一端まで転がったボール３は、方向転換路内へ導かれ、ボール戻し通路８を経由した後、反対側の方向転換路から負荷ボール転走溝の他端に戻される。   When the moving block 2 is moved in the axial direction relative to the track rail 1, the ball 3 rolls while receiving a load on the load rolling path. The ball 3 that has rolled to one end of the loaded ball rolling groove 7 is guided into the direction change path, passes through the ball return path 8, and then returned from the opposite direction change path to the other end of the load ball rolling groove. .

図１に示されるように、この実施形態の運動案内装置の軌道レール１には、従来の運動案内装置の軌道レール１とは異なり、その上面１ｂから底面１ａに向かって軌道レール１を貫通する取付け孔（軌道レール１を相手部品に取り付けるための取付け孔）が加工されていない。その替わり、軌道レール１の底面には、軌道レール１の長手方向と直交する方向に突出する棒状の脚部材１２が溶接される。脚部材１２は、軌道レール１の長手方向に一定のピッチを空けて複数本設けられる。各脚部材１２は、軌道レール１の長手方向と直交する方向に細長く伸びる。軌道レール１の上面１ｂ及び一対の側面１ｃは、鞍形状の移動ブロック２に囲まれている。しかし、軌道レール１の底面１ａは移動ブロック２で囲まれていない。よって、軌道レール１の底面１ａは、移動ブロック２が移動するのを妨げない位置になる。脚部材１２はその一端が軌道レール１の底面１ａに溶接される。脚部材１２の先端部１２ａには、軌道レール１を相手部品に取り付けるための雄ねじが加工される。   As shown in FIG. 1, the track rail 1 of the motion guide device of this embodiment is different from the track rail 1 of the conventional motion guide device, and penetrates the track rail 1 from the upper surface 1b toward the bottom surface 1a. The mounting hole (the mounting hole for mounting the track rail 1 to the counterpart part) is not processed. Instead, a rod-like leg member 12 protruding in a direction orthogonal to the longitudinal direction of the track rail 1 is welded to the bottom surface of the track rail 1. A plurality of leg members 12 are provided at a constant pitch in the longitudinal direction of the track rail 1. Each leg member 12 is elongated in a direction perpendicular to the longitudinal direction of the track rail 1. An upper surface 1 b and a pair of side surfaces 1 c of the track rail 1 are surrounded by a bowl-shaped moving block 2. However, the bottom surface 1 a of the track rail 1 is not surrounded by the moving block 2. Therefore, the bottom surface 1a of the track rail 1 is a position that does not prevent the movement block 2 from moving. One end of the leg member 12 is welded to the bottom surface 1 a of the track rail 1. A male screw for attaching the track rail 1 to the mating part is machined at the distal end portion 12a of the leg member 12.

図４に示されるように、軌道レール１を貫通する取付け孔を軌道レール１に加工しないと、軌道レール１の横幅を狭くすることができ、そして、軌道レール１と移動ブロック２との間に介在されるボール３の直径を大きくすることができる。この実施形態では、軌道レール１の左右側面に形成される左右のボール転走溝４間の距離の最小値Ｗ１が、ボール３の直径よりも小さい。そして、ボール３の直径は、軌道レール１全体の厚みＷ２の例えば６〜９割に設定される。   As shown in FIG. 4, if the mounting hole penetrating the track rail 1 is not machined into the track rail 1, the lateral width of the track rail 1 can be reduced, and between the track rail 1 and the moving block 2. The diameter of the interposed ball 3 can be increased. In this embodiment, the minimum value W1 of the distance between the left and right ball rolling grooves 4 formed on the left and right side surfaces of the track rail 1 is smaller than the diameter of the ball 3. And the diameter of the ball | bowl 3 is set to 60 to 90% of the thickness W2 of the track rail 1 whole.

軌道レール１の横幅を狭くすることによって、軌道レール１自体が撓み易くなる。また、ボール３の直径を大きくすることで、ボール３とボール転走溝４との接触点、及びボール３と移動ブロック２の接触点の位置が変動し易くなる。しかも、ボール３の直径が大きくなると、許容できる圧縮変形量も大きくなる（同じ変形量であっても、小さいボール３だと面圧が大きくなるが、大きいボール３だと面圧が大きくならない）。   By narrowing the lateral width of the track rail 1, the track rail 1 itself is easily bent. Further, by increasing the diameter of the ball 3, the position of the contact point between the ball 3 and the ball rolling groove 4 and the position of the contact point between the ball 3 and the moving block 2 are likely to fluctuate. Moreover, as the diameter of the ball 3 increases, the allowable amount of compressive deformation also increases (even if the deformation amount is the same, the surface pressure increases with the small ball 3, but the surface pressure does not increase with the large ball 3). .

軌道レール１を撓ませる観点から、軌道レール１の高さもできるだけ低くするのが望ましい。本実施形態の軌道レール１によれば、従来の軌道レール１のように相手部品の基準面（図１３Ａ参照）に突き当てる必要がないので、軌道レール１に突き当て面が不要になる。突き当て面を取り除き、軌道レール１の断面形状を上下逆さまにしても同じ形状にすることで、軌道レール１の高さを低減することができる。   From the viewpoint of bending the track rail 1, it is desirable to make the height of the track rail 1 as low as possible. According to the track rail 1 of the present embodiment, unlike the conventional track rail 1, it is not necessary to abut against the reference surface (see FIG. 13A) of the mating part. The height of the track rail 1 can be reduced by removing the abutting surface and making the track rail 1 the same shape even if the cross-sectional shape of the track rail 1 is turned upside down.

図７Ａは、脚部材１２が溶接される前の軌道レール１の側面図を示し、図７Ｂは断面図を示す。上述のように軌道レール１の左右側面には、ボール転走溝４が形成される。軌道レール１の底面１ａには、軌道レール１の長手方向に伸びる断面円弧形状の肉盛部１５が設けられる。軌道レール１はボール転走溝４が形成された後、焼入れ処理される。   FIG. 7A shows a side view of the track rail 1 before the leg member 12 is welded, and FIG. 7B shows a cross-sectional view. As described above, the ball rolling grooves 4 are formed on the left and right side surfaces of the track rail 1. On the bottom surface 1 a of the track rail 1, a built-up portion 15 having a circular arc cross section extending in the longitudinal direction of the track rail 1 is provided. The track rail 1 is quenched after the ball rolling groove 4 is formed.

図８Ａは、軌道レール１に溶接される脚部材１２の平面図を示し、図８Ｂは側面図を示す。脚部材１２は円柱形状で、その先端部１２ａには、雄ねじが加工される。脚部材１２の基端部には、側面の一部を平らにした一対の平面部１２ｂが形成される。軌道レールを相手部品に取り付けるとき、この一対の平面部１２ｂにスパナ等の工具を挟む。脚部材１２の端面１２ｃは、平坦に形成される。   FIG. 8A shows a plan view of the leg member 12 welded to the track rail 1, and FIG. 8B shows a side view. The leg member 12 has a cylindrical shape, and a male screw is processed at the distal end portion 12a. A pair of flat surface portions 12b are formed at the base end portion of the leg member 12 with a part of the side surfaces being flattened. When attaching the track rail to the mating part, a tool such as a spanner is sandwiched between the pair of flat portions 12b. The end surface 12c of the leg member 12 is formed flat.

軌道レール１と脚部材１２とはプロジェクション溶接される。軌道レール１の肉盛部１５と脚部材１２の端面１２ｃとは線接触する。軌道レール１の底面の肉盛部１５と脚部材１２の端面１２ｃとを接触させた状態で加圧し、これらに電流を流して、接触部に抵抗熱を発生させる。抵抗熱によって肉盛部１５が溶融して軌道レール１と脚部材１２が結合される。   The track rail 1 and the leg member 12 are projection welded. The built-up portion 15 of the track rail 1 and the end surface 12c of the leg member 12 are in line contact. Pressure is applied in a state where the build-up portion 15 on the bottom surface of the track rail 1 and the end surface 12c of the leg member 12 are in contact with each other, and an electric current is passed through them to generate resistance heat at the contact portion. The build-up portion 15 is melted by the resistance heat, and the track rail 1 and the leg member 12 are coupled.

図９は、軌道レール１と脚部材１２の他の例を示す。この例のように、軌道レール１の底面１ａを平坦面にし、脚部材１２の端面１２ｃを球面状に形成してもよい。この場合、軌道レール１の底面１ａと脚部材１２の端面１２ｃとは点接触する。   FIG. 9 shows another example of the track rail 1 and the leg member 12. As in this example, the bottom surface 1a of the track rail 1 may be a flat surface, and the end surface 12c of the leg member 12 may be formed in a spherical shape. In this case, the bottom surface 1a of the track rail 1 and the end surface 12c of the leg member 12 are in point contact.

図１０Ａは、従来の取付け方法を用いて、軌道レール２１を相手部品１９に取り付けた例を示し、図１０Ｂは、本実施形態の取付け方法を用いて、軌道レール１を相手部品１９に取り付けた例を示す。従来の取付け方法は、軌道レール２１の座ぐり孔２１ａにボルト２２を挿入し、ボルト２２を相手部品１９の雌ねじに締め付けるものであった。これに対し、本実施形態の取付け方法では、まず、軌道レール１の脚部材１２を相手部品１９の貫通孔２３に挿入する。次に、相手部品１９の裏面側から脚部材１２のねじにナット２４を締め付け、軌道レール１の底面１ａとナット２４との間で相手部品１９を挟むことで、軌道レール１と相手部品１９を結合する。   FIG. 10A shows an example in which the track rail 21 is attached to the mating component 19 using a conventional mounting method, and FIG. 10B shows that the track rail 1 is attached to the mating component 19 using the mounting method of the present embodiment. An example is shown. In the conventional mounting method, the bolt 22 is inserted into the counterbore 21 a of the track rail 21, and the bolt 22 is fastened to the female screw of the mating part 19. On the other hand, in the attachment method of this embodiment, first, the leg member 12 of the track rail 1 is inserted into the through hole 23 of the counterpart component 19. Next, the nut 24 is fastened to the screw of the leg member 12 from the back surface side of the mating component 19, and the mating component 19 is sandwiched between the bottom surface 1 a of the track rail 1 and the nut 24. Join.

本実施形態の取付け方法によれば、従来のボルトによる取付け方法に比べて、相手部品１９の貫通孔２３内での脚部材１２の伸縮や撓みなどの変形を期待することができる。また、軌道レール１に同じモーメントがかかったとすると、軌道レール１の横幅を狭くすることで、脚部材１２にかかる軸力を大きくすることができる。それゆえ、脚部材１２をより変形させることができる。   According to the attachment method of this embodiment, compared with the attachment method by the conventional volt | bolt, deformation | transformation of the leg member 12 in the through-hole 23 of the other component 19 can be anticipated. If the same moment is applied to the track rail 1, the axial force applied to the leg member 12 can be increased by narrowing the lateral width of the track rail 1. Therefore, the leg member 12 can be further deformed.

図１１は、軌道レール１を相手部品１９に取り付ける方法の他の例を示す。この例では、脚部材１２を相手部品１９の貫通孔２３に挿入した後、相手部品１９の裏側から脚部材１２の先端の溶接部２５と相手部品１９とを溶接している。脚部材１２の断面形状は、相手部品の貫通孔２３の断面形状と同じであれば、円形状でも、四角形状でも、Ｔ字形状でもよい。   FIG. 11 shows another example of a method for attaching the track rail 1 to the counterpart component 19. In this example, after the leg member 12 is inserted into the through hole 23 of the counterpart component 19, the welded portion 25 at the tip of the leg member 12 and the counterpart component 19 are welded from the back side of the counterpart component 19. As long as the cross-sectional shape of the leg member 12 is the same as the cross-sectional shape of the through-hole 23 of the counterpart part, it may be circular, square, or T-shaped.

図１２Ａは、二つに分割された移動ブロック２にモーメントＭを作用させたときのボール３の負荷分布状態を示し、図１２Ｂは、分割されていない移動ブロック２にモーメントＭを作用させたときのボール３の負荷分布状態を示す。テーブル２６にモーメントがかかったとき、テーブル２６よりも移動ブロック２の方が剛性が高いので、テーブル２６はしなるが、移動ブロック２は剛体のままと考えることができる。図１２Ｂに示されるように、移動ブロック２が分割されていない場合、移動ブロック２にモーメントＭが作用すると、移動ブロック２に傾き角が生じ、ボール３がモーメントを支える状態となる。移動ブロック２の進行方向の両端に位置するボール３に最も大きな負荷を受け、移動ブロック２の内側にあるボール３ほど受ける負荷が徐々に小さくなる。移動ブロック２の中央付近にあるボール３は、殆ど荷重を負荷しないので、有効に働いていない。   FIG. 12A shows a load distribution state of the ball 3 when the moment M is applied to the moving block 2 divided into two parts, and FIG. 12B shows a case where the moment M is applied to the undivided moving block 2. The load distribution state of the ball 3 is shown. When a moment is applied to the table 26, the moving block 2 is higher in rigidity than the table 26. Therefore, the table 26 is bent, but the moving block 2 can be considered to be a rigid body. As shown in FIG. 12B, when the moving block 2 is not divided, when the moment M acts on the moving block 2, an inclination angle is generated in the moving block 2, and the ball 3 is in a state of supporting the moment. The largest load is applied to the balls 3 positioned at both ends of the moving block 2 in the traveling direction, and the load received by the balls 3 located inside the moving block 2 is gradually reduced. The ball 3 in the vicinity of the center of the moving block 2 does not work effectively because it hardly applies a load.

これに対して、図１２Ａに示されるように、移動ブロック２を進行方向に二分割した場合、テーブル２６にモーメントＭが作用すると、二つの分割ピース１６が独立に変位し、二つの分割ピース１６それぞれに傾き角が生じる。図１２Ｂに示される場合と比較して、荷重を負荷しないボール３の数が低減し、有効に働くボール３の数が増大するので、移動ブロック２の許容モーメントを大きくすることができる。   On the other hand, as shown in FIG. 12A, when the moving block 2 is divided into two in the traveling direction, when the moment M acts on the table 26, the two divided pieces 16 are displaced independently, and the two divided pieces 16 are separated. Each has an inclination angle. Compared to the case shown in FIG. 12B, the number of balls 3 that do not apply a load is reduced and the number of balls 3 that work effectively increases, so that the allowable moment of the moving block 2 can be increased.

なお、本発明は上記の実施形態に限られることなく、本発明の要旨を変更しない範囲で種々変更可能である。例えば、軌道レールの曲げ変形をより利用するために、軌道レールを相手部品から浮かして（軌道レールと相手部品との間に隙間を空けた状態で）取り付けてもよい。また本発明は、レールの横幅が３ｍｍ以下であり、レールに取付け孔を空けることができない所謂マイクロガイドレールの取付け方法にも適用することができる。さらに本発明は、移動ブロックが鞍形状の運動案内装置に限られることなく、外筒に軸線方向に伸びるスリットが空けられたボールスプラインにも適用することができる。   The present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the scope of the present invention. For example, in order to make better use of the bending deformation of the track rail, the track rail may be attached to the counterpart component (with a gap between the track rail and the counterpart component). The present invention can also be applied to a so-called micro guide rail mounting method in which the rail has a lateral width of 3 mm or less and a mounting hole cannot be formed in the rail. Further, the present invention is not limited to the motion guide device having a moving block as a moving block, but can also be applied to a ball spline in which a slit extending in the axial direction is formed in the outer cylinder.

本発明の一実施形態における運動案内装置の斜視図The perspective view of the exercise | movement guide apparatus in one Embodiment of this invention. 上記運動案内装置の平面図Plan view of the motion guide device 上記運動案内装置の側面図Side view of the motion guide device 上記運動案内装置の軌道レールと直交する方向の断面図Sectional view in the direction orthogonal to the track rail of the motion guide device 移動ブロックの進行方向に沿った断面図Sectional view along the direction of travel of the moving block エンドプレートの正面図Front view of end plate 軌道レールの側面図Side view of track rail 軌道レールの断面図Cross section of track rail 脚部材の平面図Top view of leg members 脚部材の側面図Side view of leg member 軌道レール及び脚部材の他の例を示す図The figure which shows the other example of a track rail and a leg member 従来の取付け方法を用いて軌道レールを相手部品に取り付けた例を示す図The figure which shows the example which attached the track rail to the other part using the conventional attachment method 本発明の取付け方法を用いて軌道レールを相手部品に取り付けた例を示す図The figure which shows the example which attached the track rail to the other party component using the attachment method of this invention 軌道レールを相手部品に取り付ける方法の他の例を示す図The figure which shows the other example of the method of attaching a track rail to a mating part 二つに分割された移動ブロックにモーメントを作用させたときのボールの負荷分布状態を示す図Diagram showing the load distribution of a ball when a moment is applied to a moving block divided into two 割されていない移動ブロックにモーメントを作用させたときのボールの負荷分布状態を示す図The figure which shows the load distribution state of a ball when a moment is applied to an unbroken moving block 従来の軌道レールの相手部品への取付け方法を示す工程図Process diagram showing how to attach conventional track rail to mating parts 従来の軌道レールの相手部品への取付け方法を示す工程図Process diagram showing how to attach conventional track rail to mating parts 従来の軌道レールの相手部品への取付け方法を示す工程図Process diagram showing how to attach conventional track rail to mating parts

符号の説明Explanation of symbols

１…軌道レール
１ａ…軌道レールの底面
２…移動ブロック
２ａ…中央部
２ｂ…側壁部
３…ボール（転動体）
４…ボール転走溝（転動体転走溝）
７…負荷ボール転走溝（負荷転動体転走溝）
１２…脚部材
１２ａ…脚部材の先端部
１５…肉盛部
１９…相手部品
２３…貫通孔
２４…ナット
２５…溶接部
Ｗ１…左右のボール転走溝間の距離の最小値 DESCRIPTION OF SYMBOLS 1 ... Track rail 1a ... Bottom surface 2 of track rail ... Moving block 2a ... Central part 2b ... Side wall part 3 ... Ball (rolling element)
4 ... Ball rolling groove (rolling element rolling groove)
7 ... Loaded ball rolling groove (Loaded rolling element rolling groove)
12 ... Leg member 12a ... Leg member tip 15 ... Overlaying portion 19 ... Counterpart 23 ... Through hole 24 ... Nut 25 ... Welded portion W1 ... Minimum distance between left and right ball rolling grooves

Claims (3)

長手方向に伸びる転動体転走溝が形成される軌道レールと、前記軌道レールの前記転動体転走溝に対向する負荷転動体転走溝が形成される移動ブロックと、前記移動ブロックの前記負荷転動体転走溝を含む転動体循環経路に収容される複数の転動体と、を備える運動案内装置において、
前記軌道レールの、前記移動ブロックが移動するのを妨げない位置に、前記軌道レールの長手方向に交差する方向に突出する脚部材を設け、
前記脚部材を利用して前記軌道レールを相手部品に取り付けることができ、
前記軌道レールは、前記脚部材が設けられる底面、上面及び前記転動体転走溝が形成される左右一対の側面と、を有し、
前記移動ブロックは、その全体が鞍形状に形成され、前記軌道レールの上面に対向する中央部と、前記中央部の幅方向の両端部に設けられ、前記軌道レールの左右側面に対向する一対の側壁部と、を有し、
前記転動体は、ボールであり、
そして、前記軌道レールの長手方向と直交する方向の断面において、前記軌道レールの左右側面に形成される左右の前記転動体転走溝間の距離の最小値が、前記ボールの直径よりも小さい運動案内装置。 A track rail formed with rolling element rolling grooves extending in the longitudinal direction, a moving block formed with a load rolling element rolling groove facing the rolling element rolling groove of the track rail, and the load of the moving block In a motion guide device comprising a plurality of rolling elements housed in a rolling element circulation path including rolling element rolling grooves,
A leg member that protrudes in a direction intersecting the longitudinal direction of the track rail is provided at a position that does not prevent the moving block from moving on the track rail,
The track rail can be attached to a mating part using the leg member,
The track rail has a bottom surface on which the leg members are provided, a top surface, and a pair of left and right side surfaces on which the rolling element rolling grooves are formed,
The moving block is formed in a bowl shape as a whole, and is provided at a center portion facing the upper surface of the track rail, and at both ends in the width direction of the center portion, and a pair of faces facing the left and right side surfaces of the track rail. A side wall, and
The rolling element is a ball,
Then, in a cross section in a direction perpendicular to the longitudinal direction of the track rail, a motion in which the minimum value of the distance between the left and right rolling element rolling grooves formed on the left and right side surfaces of the track rail is smaller than the diameter of the ball. Guide device. 長手方向に伸びる転動体転走溝が形成される軌道レールと、前記軌道レールの前記転動体転走溝に対向する負荷転動体転走溝が形成される移動ブロックと、前記移動ブロックの前記負荷転動体転走溝を含む転動体循環経路に収容される複数の転動体と、を備える運動案内装置において、
前記軌道レールの、前記移動ブロックが移動するのを妨げない位置に、前記軌道レールの長手方向に交差する方向に突出する脚部材を設け、
前記脚部材を利用して前記軌道レールを相手部品に取り付けることができ、
前記軌道レールには、軌道レールの長手方向に伸びる断面円弧形状の肉盛部が設けられ、
前記脚部材は、前記軌道レールの前記肉盛部にプロジェクション溶接もしくは摩擦溶接される運動案内装置。 A track rail formed with rolling element rolling grooves extending in the longitudinal direction, a moving block formed with a load rolling element rolling groove facing the rolling element rolling groove of the track rail, and the load of the moving block In a motion guide device comprising a plurality of rolling elements housed in a rolling element circulation path including rolling element rolling grooves,
A leg member that protrudes in a direction intersecting the longitudinal direction of the track rail is provided at a position that does not prevent the moving block from moving on the track rail,
The track rail can be attached to a mating part using the leg member,
The track rail is provided with a built-up portion having an arc-shaped cross section extending in the longitudinal direction of the track rail,
The leg member is a motion guide device that is projection welded or friction welded to the build-up portion of the track rail. 長手方向に伸びる転動体転走溝が形成される軌道レールと、前記軌道レールの前記転動体転走溝に対向する負荷転動体転走溝が形成される移動ブロックと、前記移動ブロックの前記負荷転動体転走溝を含む転動体循環経路に収容される複数の転動体と、を備える運動案内装置において、
前記軌道レールの、前記移動ブロックが移動するのを妨げない位置に、前記軌道レールの長手方向に交差する方向に突出する脚部材を設け、
前記脚部材を利用して前記軌道レールを相手部品に取り付けることができ、
前記軌道レールの、前記脚部材が取り付けられる底面が平坦面に形成され、
球面状の端部を有する前記脚部材が、前記軌道レールの前記底面にプロジェクション溶接もしくは摩擦溶接される運動案内装置。 A track rail formed with rolling element rolling grooves extending in the longitudinal direction, a moving block formed with a load rolling element rolling groove facing the rolling element rolling groove of the track rail, and the load of the moving block In a motion guide device comprising a plurality of rolling elements housed in a rolling element circulation path including rolling element rolling grooves,
A leg member that protrudes in a direction intersecting the longitudinal direction of the track rail is provided at a position that does not prevent the moving block from moving on the track rail,
The track rail can be attached to a mating part using the leg member,
A bottom surface of the track rail to which the leg member is attached is formed as a flat surface,
A motion guide device in which the leg member having a spherical end is projection welded or friction welded to the bottom surface of the track rail.
JP2006263320A 2006-09-27 2006-09-27 MOTION GUIDE DEVICE AND MOTION GUIDE DEVICE INSTALLATION METHOD Active JP4712662B2 (en)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002054632A (en) * 2000-08-14 2002-02-20 Thk Co Ltd Linear motion guiding device and attachment structure of the same
JP2005282744A (en) * 2004-03-30 2005-10-13 Nok Corp Actuator
JP2005337425A (en) * 2004-05-28 2005-12-08 Nippon Thompson Co Ltd Linear motion guidance unit

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3731905B2 (en) * 1993-12-28 2006-01-05 Ｔｈｋ株式会社 Moving body mounting plate for linear sliding guide device
JPH08291822A (en) * 1995-04-19 1996-11-05 Gou Shoji Kk Roller with screw

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002054632A (en) * 2000-08-14 2002-02-20 Thk Co Ltd Linear motion guiding device and attachment structure of the same
JP2005282744A (en) * 2004-03-30 2005-10-13 Nok Corp Actuator
JP2005337425A (en) * 2004-05-28 2005-12-08 Nippon Thompson Co Ltd Linear motion guidance unit

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