JP6558031B2

JP6558031B2 - Linear motion guide cap

Info

Publication number: JP6558031B2
Application number: JP2015076135A
Authority: JP
Inventors: 松本　淳; 淳松本
Original assignee: NSK Ltd
Current assignee: NSK Ltd
Priority date: 2015-04-02
Filing date: 2015-04-02
Publication date: 2019-08-14
Anticipated expiration: 2035-04-02
Also published as: JP2016196905A

Description

この発明は、直動案内装置の案内レールをボルトで被取付部に取り付けるために、案内レールに設けた取り付け穴の座ぐり部を塞ぐキャップに関する。 The present invention relates to a cap for closing a spot facing portion of a mounting hole provided in a guide rail in order to attach a guide rail of a linear motion guide device to a mounted portion with a bolt.

直動案内装置の一例を図１０に示す。図１０に示すように、直動案内装置１００は、案内レール１１０とスライダ１２０と複数個の転動体１３０とを備えている。案内レール１１０およびスライダ１２０は、互いに対向配置されて転動体１３０の転動通路を形成する転動面１１３，１２１を有する。スライダ１２０は、転動体１３０の戻し通路１２２と、この戻し通路１２２と転動通路とを連通させる方向転換路を有する。
転動通路、戻し通路、および方向転換路で転動体１３０の循環経路が構成され、この循環経路内を循環する転動体１３０を介して、案内レール１１０およびスライダ１２０の一方が他方に対して相対的に直線運動する。 An example of the linear motion guide device is shown in FIG. As shown in FIG. 10, the linear motion guide device 100 includes a guide rail 110, a slider 120, and a plurality of rolling elements 130. The guide rail 110 and the slider 120 have rolling surfaces 113 and 121 that are arranged to face each other and form a rolling path of the rolling element 130. The slider 120 has a return path 122 of the rolling element 130 and a direction changing path that connects the return path 122 and the rolling path.
The rolling path, the return path, and the direction changing path constitute a circulation path of the rolling element 130, and one of the guide rail 110 and the slider 120 is relative to the other through the rolling element 130 that circulates in the circulation path. Move linearly.

直動案内装置１００の案内レール１１０には、基台等の被取付部にボルトを用いて取り付けるための取り付け穴１４０が形成されている。取り付け穴１４０は、図１１に示すように、ボルトの頭部を収める座ぐり部１４１と、ボルトの軸部を収める軸収納部１４２とからなる。また、座ぐり部１４１の上端に面取り部１４３が形成されている。案内レール１１０を基台等にボルトで固定した後、取り付け穴１４０にゴミが入ることを防止する目的で、座ぐり部１４１の上部をキャップで塞いでいる。
このキャップの従来例としては、アルミ製や真鍮製で、外周部にローレット加工が施されたものがあるが、金属製のキャップは取り付け穴に装着しにくく、装着時に疵が付き易い。また、合成樹脂製のキャップもあるが、合成樹脂製のキャップには、座ぐり部を確実に塞ぐことと、座ぐり部内での姿勢が安定することが両立できないという課題がある。 The guide rail 110 of the linear motion guide device 100 is formed with a mounting hole 140 for mounting to a mounted portion such as a base using a bolt. As shown in FIG. 11, the mounting hole 140 includes a counterbore portion 141 that houses a bolt head portion and a shaft housing portion 142 that houses a bolt shaft portion. Further, a chamfered portion 143 is formed at the upper end of the spot facing portion 141. After the guide rail 110 is fixed to the base or the like with a bolt, the upper portion of the counterbore portion 141 is closed with a cap for the purpose of preventing dust from entering the mounting hole 140.
As conventional examples of this cap, there are those made of aluminum or brass and knurled on the outer peripheral portion. However, the metal cap is difficult to attach to the mounting hole, and is easily wrinkled when attached. There is also a synthetic resin cap. However, the synthetic resin cap has a problem that it is impossible to satisfy both of the problem of reliably closing the counterbore part and stabilizing the posture in the counterbore part.

特許文献１には、上記課題を解決することができる直動案内装置用キャップが記載されている。このキャップは、金属製で円柱状の本体と、リング状で弾性材製の周縁部材とからなる。本体は、円柱の軸方向で径の異なる大径部と小径部とからなり、本体の小径部に周縁部材が固定されている。本体の大径部の直径は、大径部が座ぐり部に所定の隙間を有して配置される寸法である。周縁部材の外径は、周縁部材が弾性変形状態で座ぐり部に配置される寸法である。 Patent Document 1 describes a linear motion guide cap that can solve the above-described problems. The cap is made of a metal columnar body and a ring-shaped peripheral member made of an elastic material. The main body includes a large diameter portion and a small diameter portion having different diameters in the axial direction of the cylinder, and a peripheral member is fixed to the small diameter portion of the main body. The diameter of the large-diameter portion of the main body is a dimension in which the large-diameter portion is disposed with a predetermined gap in the spot facing portion. The outer diameter of the peripheral member is a dimension at which the peripheral member is disposed in the spot facing portion in an elastically deformed state.

特許文献２には、特許文献１のキャップではキャップの上面が案内レールの上面と同じ位置に保持されない場合があるという課題が記載され、この解決を解決すること目的とした直動案内装置用キャップが記載されている。
特許文献２のキャップは、底面と上面を有する合成樹脂製のキャップ本体と、キャップ本体の上面に結合されている金属上蓋と、を備えている。キャップ本体は、ボルト孔（案内レールの取り付け穴）の径方向で塑性変形することにより、ボルト孔内に嵌合される。キャップ本体がボルト孔の軸方向で塑性変形することにより、金属上蓋の上表面とガイドレール（案内レール）の上表面とが同一の平面に位置する。キャップ本体は、金属上蓋の結合部に合成樹脂を射出成形することで形成されている。 Patent Document 2 describes a problem in which the upper surface of the cap may not be held at the same position as the upper surface of the guide rail in the cap of Patent Document 1, and a cap for a linear motion guide device intended to solve this solution Is described.
The cap of Patent Document 2 includes a synthetic resin cap main body having a bottom surface and an upper surface, and a metal upper lid coupled to the upper surface of the cap main body. The cap body is fitted into the bolt hole by plastic deformation in the radial direction of the bolt hole (attachment hole of the guide rail). When the cap body is plastically deformed in the axial direction of the bolt hole, the upper surface of the metal upper cover and the upper surface of the guide rail (guide rail) are positioned on the same plane. The cap body is formed by injection molding a synthetic resin at a joint portion of the metal top cover.

つまり、特許文献１および２のキャップは、金属製部品と合成樹脂製部品とを組み合わせた構造であり、金属製部品の円板部が案内レールの取り付け穴に緩く嵌まり、合成樹脂製部品の円周部（円周面を有する周縁部）が案内レールの取り付け穴に弾性変形状態で配置されるものである。 That is, the caps of Patent Documents 1 and 2 have a structure in which a metal part and a synthetic resin part are combined, and the disk part of the metal part fits loosely in the mounting hole of the guide rail, and the synthetic resin part A circumferential part (peripheral part having a circumferential surface) is arranged in an elastically deformed state in a mounting hole of the guide rail.

特開２００７−１００３６号公報JP 2007-10036 A 特開２０１４−１３７１４０号公報JP 2014-137140 A

直動案内装置用キャップが、金属製部品と合成樹脂製部品とを組み合わせた構造であって、金属製部品の円板部が案内レールの取り付け穴に緩く嵌まり、合成樹脂製部品の円周部が案内レールの取り付け穴に弾性変形状態で配置されるものである場合、各部品の製造誤差によって、円板部と円周部の中心軸がずれた状態で両部品が固定され、キャップが取り付け穴に取り付けできない事態となる可能性がある。 The linear motion guide cap has a structure in which a metal part and a synthetic resin part are combined, and the disk part of the metal part fits loosely in the mounting hole of the guide rail, and the circumference of the synthetic resin part If the parts are arranged in the guide rail mounting holes in an elastically deformed state, due to the manufacturing error of each part, both parts are fixed with the center axis of the disk part and the circumferential part shifted, and the cap is There is a possibility that it cannot be installed in the mounting hole.

この発明の課題は、金属製部品と合成樹脂製部品とを組み合わせた構造を有し、金属製部品の円板部が案内レールの取り付け穴に緩く嵌まり、合成樹脂製部品の円周部が案内レールの取り付け穴に弾性変形状態で配置される直動案内装置用キャップに関し、このキャップを、各部品に製造誤差があって円板部と円周部の中心軸がずれている場合でも、取り付け穴に取り付けできるようにすることである。 An object of the present invention is to have a structure in which a metal part and a synthetic resin part are combined, the disk part of the metal part is loosely fitted in the mounting hole of the guide rail, and the circumferential part of the synthetic resin part is Regarding the cap for linear motion guide device that is arranged in an elastically deformed state in the mounting hole of the guide rail, even if there is a manufacturing error in each part and the center axis of the disc part and the circumferential part is shifted, It is to be able to attach to the mounting hole.

上記課題を解決できる直動案内装置用キャップの第一態様として、下記の構成(1) 〜(3) を有するものが挙げられる。
(1) 直動案内装置の案内レールをボルトで被取付部に取り付けるために設けた、前記案内レールの上面から下面に貫通する取り付け穴の座ぐり部を塞ぐキャップである。金属製の蓋部材と、合成樹脂製の栓部材とからなる。
(2) 前記蓋部材は、前記座ぐり部に所定の隙間を介して配置される円板部を有する。栓部材は、前記座ぐり部に弾性変形状態で配置される円周部を有する。前記円板部は、前記円周部よりも、前記座ぐり部の前記上面側に配置される。
(3) 前記蓋部材および前記栓部材は、相対移動が、前記円板部の軸方向では阻害され、前記円板部の径方向では許容された状態で結合されている。 As a first aspect of the cap for a linear motion guide device capable of solving the above-mentioned problems, there are those having the following configurations (1) to (3).
(1) A cap provided to attach the guide rail of the linear motion guide device to the attached portion with a bolt and closes a spot facing portion of an attachment hole penetrating from the upper surface to the lower surface of the guide rail. It consists of a metal lid member and a synthetic resin plug member.
(2) The lid member has a disk portion disposed in the counterbore portion with a predetermined gap. The plug member has a circumferential portion disposed in the counterbore portion in an elastically deformed state. The disc portion is disposed on the upper surface side of the counterbore portion with respect to the circumferential portion.
(3) The lid member and the plug member are coupled in a state where relative movement is inhibited in the axial direction of the disc portion and allowed in the radial direction of the disc portion.

この態様のキャップは、前記構成(2) を満たす栓部材を有することで、座ぐり部に対して容易に、且つ、確実に取り付けることができる。また、金属製の円板部が座ぐり部の案内レール上面側に配置されるため、キャップが破損しにくい。
この態様のキャップは、前記構成(3) を有することにより、蓋部材が栓部材から浮き上がることが防止できる。また、蓋部材および栓部材の製造誤差により、円板部の中心軸と円周部の中心軸とにずれが生じた場合には、組み立て時に、蓋部材および栓部材を円板部と円周部の径方向で相対移動させることにより、前記ずれを吸収できる。よって、このずれ量が、円板部と円周部の径方向で許容された相対移動範囲内であれば、円板部を座ぐり部に干渉させずに、キャップを座ぐり部に取り付けることができる。 The cap of this aspect can be easily and reliably attached to the counterbore part by having the plug member that satisfies the configuration (2). Further, since the metal disk portion is disposed on the upper surface side of the guide rail of the counterbore portion, the cap is not easily damaged.
The cap of this aspect can prevent the lid member from floating from the plug member by having the configuration (3). In addition, if there is a deviation between the central axis of the disk part and the central axis of the circumferential part due to manufacturing errors of the lid member and the plug member, the lid member and the plug member are The shift can be absorbed by relative movement in the radial direction of the portion. Therefore, if the amount of deviation is within the relative movement range permitted in the radial direction of the disc portion and the circumferential portion, the cap is attached to the spot facing portion without causing the disc portion to interfere with the spot facing portion. Can do.

上記課題を解決できる直動案内装置用キャップの第二態様として、前記構成(1) と下記の構成(4) 〜(6) を有するものが挙げられる。
(4) 前記蓋部材は、前記座ぐり部に所定の隙間を介して配置される円板部と、前記円板部の軸方向一面から突出する円柱部と、前記円柱部の前記円板部との境界に設けた周溝と、を有する。前記栓部材は、内径が前記円柱部の外径より大きく、外径が前記座ぐり部の直径より大きな円筒部と、前記円筒部の軸方向一端に形成された内向きフランジ部と、を有する。なお、前記円筒部の外周縁部が、前記構成(2) の「前記座ぐり部に弾性変形状態で配置される円周部」に相当する。 As a second aspect of the cap for a linear motion guide device that can solve the above-mentioned problems, one having the configuration (1) and the following configurations (4) to (6) can be cited.
(4) The lid member includes a disc portion disposed in the counterbore portion with a predetermined gap, a cylindrical portion protruding from one axial surface of the disc portion, and the disc portion of the cylindrical portion. And a circumferential groove provided at the boundary. The plug member has a cylindrical portion whose inner diameter is larger than the outer diameter of the columnar portion and whose outer diameter is larger than the diameter of the counterbore portion, and an inward flange portion formed at one axial end of the cylindrical portion. . The outer peripheral edge portion of the cylindrical portion corresponds to the “circumferential portion disposed in the counterbore portion in an elastically deformed state” in the configuration (2).

(5) 前記内向きフランジ部の内径は、前記周溝の底部をなす円の直径より大きく、前記円板部の外径より小さい。前記内向きフランジ部の軸方向寸法は、前記周溝の軸方向寸法と同じかそれ以上である。
(6) 前記内向きフランジ部側から前記円筒部内に前記円柱部が挿入され、前記内向きフランジ部の内周部が前記周溝に軸方向に弾性変形状態で嵌まることで、前記蓋部材および前記栓部材は、前記円板部の軸方向での相対移動が阻害され、且つ、前記円板部の径方向での相対移動が許容された状態で結合されている。 (5) The inner diameter of the inward flange portion is larger than the diameter of the circle forming the bottom of the circumferential groove, and smaller than the outer diameter of the disc portion. The axial dimension of the inward flange portion is equal to or greater than the axial dimension of the circumferential groove.
(6) The cap member is inserted into the cylindrical portion from the inward flange portion side, and the inner peripheral portion of the inward flange portion is fitted into the peripheral groove in an elastically deformed state in the axial direction. The stopper member is coupled in a state where relative movement in the axial direction of the disk portion is inhibited and relative movement in the radial direction of the disk portion is allowed.

上記課題を解決できる直動案内装置用キャップの第三態様として、前記構成(1) と下記の構成(7) 〜(10)を有するものが挙げられる。
(7) 前記蓋部材は、前記座ぐり部に所定の隙間を介して配置される円板部と、前記円板部の直径方向両端部から軸方向に延びる一対または複数対の縦板部と、前記一対または複数対の縦板部の先端からそれぞれ前記円板部の径方向中心側に延びる一対または複数対の横板部と、を有する。 As a third aspect of the cap for a linear motion guide device that can solve the above-mentioned problems, one having the configuration (1) and the following configurations (7) to (10) can be cited.
(7) The lid member includes a disc portion disposed in the counterbore portion with a predetermined gap, and a pair or a plurality of pairs of vertical plate portions extending in the axial direction from both ends in the diameter direction of the disc portion. And a pair or a plurality of pairs of horizontal plates extending from the front ends of the pair or a plurality of pairs of vertical plates to the center in the radial direction of the disk.

(8) 前記栓部材は、前記座ぐり部に弾性変形状態で配置される円周部を有する円柱体からなる。前記円柱体の軸方向一端面が前記円板部に接触し、前記円周部の直径方向両端部に前記蓋部材を結合する一対または複数対の結合部が形成されている。前記一対または複数対の結合部は、前記一対または複数対の縦板部が嵌まる一対または複数対の凹部と、前記凹部に連続して前記円柱体の軸方向他端面に形成された、前記一対または複数対の横板部が嵌まる一対または複数対の嵌合面と、を有する。 (8) The plug member is formed of a cylindrical body having a circumferential portion disposed in an elastically deformed state on the counterbore portion. One end surface in the axial direction of the cylindrical body is in contact with the disk portion, and a pair or a plurality of pairs of coupling portions for coupling the lid member are formed at both ends in the diameter direction of the circumferential portion. The pair or the plurality of pairs of coupling portions are formed on the other end surface in the axial direction of the cylindrical body, the pair or the plurality of pairs of concave portions into which the pair or the plurality of vertical plate portions are fitted, and the concave portions. A pair or a plurality of pairs of fitting surfaces on which the pair or a plurality of pairs of horizontal plate portions are fitted.

(9)前記一対または複数対の凹部の底面間の寸法は、前記一対または複数対の縦板部の対向面間の寸法より小さく、前記一対または複数対の嵌合面と前記円柱体の軸方向一端面との距離は、前記円板部と前記一対または複数対の横板との対向面間隔と同じかそれより大きい。
(10)前記蓋部材および前記栓部材は、前記横板部と前記嵌合面との嵌め合いにより、前記円板部の軸方向での相対移動が阻害され、且つ、前記縦板部と前記凹部との嵌め合いにより前記円板部の径方向での相対移動が許容された状態で結合されている。 (9) The dimension between the bottom surfaces of the pair or plural pairs of recesses is smaller than the dimension between the opposing surfaces of the pair or plural pairs of vertical plate portions, and the pair or plural pairs of fitting surfaces and the axis of the cylindrical body The distance from the one end surface in the direction is equal to or larger than the distance between the opposing surfaces of the disk portion and the pair or plural pairs of horizontal plates.
(10) The lid member and the plug member are inhibited from relative movement in the axial direction of the disc portion due to the fitting of the horizontal plate portion and the fitting surface, and the vertical plate portion and the plug member The discs are coupled in a state in which relative movement in the radial direction is allowed by fitting with the recesses.

この発明によれば、金属製部品と合成樹脂製部品とを組み合わせた構造を有し、金属製部品の円板部が案内レールの取り付け穴に緩く嵌まり、合成樹脂製部品の円周部が案内レールの取り付け穴に弾性変形状態で配置される直動案内装置用キャップとして、各部品に製造誤差があって円板部と円周部の中心軸がずれている場合でも、取り付け穴に取り付けできるキャップが提供できる。 According to this invention, it has a structure in which a metal part and a synthetic resin part are combined, the disk part of the metal part fits loosely in the mounting hole of the guide rail, and the circumferential part of the synthetic resin part is As a linear motion guide cap that is placed in an elastically deformed state in the guide rail mounting hole, even if there is a manufacturing error in each part and the center axis of the disc part and the circumferential part is shifted, it is attached to the mounting hole. Cap can be provided.

第一実施形態の直動案内装置用キャップを説明する図であって、（ａ）はキャップの平面図、（ｂ）は（ａ）のＡ−Ａ断面図、（ｃ）はキャップが取り付けられる案内レールの取り付け穴を示す断面図である。It is a figure explaining the cap for linear motion guide apparatuses of 1st embodiment, Comprising: (a) is a top view of a cap, (b) is AA sectional drawing of (a), (c) is a cap attached. It is sectional drawing which shows the attachment hole of a guide rail. 第一実施形態の直動案内装置用キャップを構成する蓋部材の正面図（ａ）と栓部材の断面図（ｂ）である。It is the front view (a) of the cover member which comprises the cap for linear motion guide apparatuses of 1st embodiment, and sectional drawing (b) of a stopper member. 案内レールに第一実施形態の直動案内装置用キャップが取り付けられた状態を示す断面図である。It is sectional drawing which shows the state by which the cap for linear motion guide apparatuses of 1st embodiment was attached to the guide rail. 蓋部材および栓部材の製造誤差とその吸収について説明する図である。It is a figure explaining the manufacturing error and its absorption of a lid member and a stopper member. 案内レールに、蓋部材と栓部材との径方向ずれが少し残った状態のキャップが取り付けられた状態を示す断面図である。It is sectional drawing which shows the state in which the cap of the state in which the radial direction shift | offset | difference of the cover member and the plug member remained a little was attached to the guide rail. 第二実施形態の直動案内装置用キャップを説明する図であって、（ａ）はキャップの斜視図、（ｂ）はキャップの断面図、（ｃ）はキャップが取り付けられる案内レールの取り付け穴を示す断面図である。It is a figure explaining the cap for linear motion guide apparatuses of 2nd embodiment, Comprising: (a) is a perspective view of a cap, (b) is sectional drawing of a cap, (c) is an attachment hole of the guide rail to which a cap is attached. FIG. 第二実施形態の直動案内装置用キャップを構成する蓋部材の斜視図（ａ）と栓部材の斜視図（ｂ）である。It is the perspective view (a) of the cover member which comprises the cap for linear motion guide apparatuses of 2nd embodiment, and the perspective view (b) of a plug member. 第二実施形態の直動案内装置用キャップを構成する蓋部材の断面図（ａ）と栓部材の断面図（ｂ）である。It is sectional drawing (a) of the cover member which comprises the cap for linear motion guide apparatuses of 2nd embodiment, and sectional drawing (b) of a stopper member. 案内レールに第二実施形態の直動案内装置用キャップが取り付けられた状態を示す断面図である。It is sectional drawing which shows the state by which the cap for linear motion guide apparatuses of 2nd embodiment was attached to the guide rail. 直動案内装置の従来例を示す部分断面斜視図である。It is a fragmentary sectional perspective view which shows the prior art example of a linear motion guide apparatus. 案内レールの取り付け穴を説明する図である。It is a figure explaining the attachment hole of a guide rail.

以下、この発明の実施形態について説明するが、この発明は以下の実施形態に限定されない。
［第一実施形態］
図１（ａ）（ｂ）に示すように、第一実施形態のキャップ１は、金属製の蓋部材２と合成樹脂製の栓部材３とからなる。
図１（ｃ）に示すように、直動案内装置の案内レール１１０には、上面１１１から下面１１２に貫通する取り付け穴１４０が形成されている。取り付け穴１４０は、ボルトの頭部を収める座ぐり部１４１と、ボルトの軸部を収める軸収納部１４２とからなり、座ぐり部１４１の上端に面取り部１４３が形成されている。
蓋部材２の最大直径Ｄ２は、軸部１４２の直径Ｊより大きく、座ぐり部１４１の直径Ｚより少し（例えば０．１〜０．５ｍｍ）小さい。栓部材３の最大直径Ｄ３は、座ぐり部１４１の直径Ｚより少し（例えば０．１〜０．５ｍｍ）大きく、面取り部１４３の最大直径Ｍより小さい。 Hereinafter, although embodiment of this invention is described, this invention is not limited to the following embodiment.
[First embodiment]
As shown in FIGS. 1A and 1B, a cap 1 according to the first embodiment includes a metal lid member 2 and a synthetic resin plug member 3.
As shown in FIG. 1C, the guide rail 110 of the linear guide apparatus is formed with an attachment hole 140 penetrating from the upper surface 111 to the lower surface 112. The mounting hole 140 includes a counterbore portion 141 for storing the bolt head portion and a shaft storage portion 142 for storing the shaft portion of the bolt, and a chamfered portion 143 is formed at the upper end of the counterbore portion 141.
The maximum diameter D2 of the lid member 2 is larger than the diameter J of the shaft portion 142 and slightly smaller than the diameter Z of the spot facing portion 141 (for example, 0.1 to 0.5 mm). The maximum diameter D3 of the plug member 3 is slightly larger than the diameter Z of the counterbore part 141 (for example, 0.1 to 0.5 mm) and smaller than the maximum diameter M of the chamfered part 143.

図２（ａ）に示すように、蓋部材２は、円板部２１と、円板部２１の軸方向一面から突出する円柱部２２と、円柱部２２の円板部２１との境界に設けた周溝２３と、を有する。円柱部２２の先端部は、先端に向けて縮径するテーパ部２２ａとなっている。円板部２１の直径Ｄ２１は円柱部２２の最大直径Ｄ２２より大きい。円板部２１の直径Ｄ２１は蓋部材２の最大直径Ｄ２である。周溝２３の底面をなす円の直径Ｄ２３は、テーパ部２２ａの最小直径Ｄ２２ａと同じである。蓋部材２は、鉄鋼、真鍮、アルミニウム合金などの金属材料からなる円柱状の素材を切削加工することで製造できる。 As shown in FIG. 2A, the lid member 2 is provided at the boundary between the disc portion 21, the column portion 22 protruding from one surface in the axial direction of the disc portion 21, and the disc portion 21 of the column portion 22. And a circumferential groove 23. The distal end portion of the cylindrical portion 22 is a tapered portion 22a that decreases in diameter toward the distal end. The diameter D21 of the disc part 21 is larger than the maximum diameter D22 of the cylindrical part 22. The diameter D21 of the disc portion 21 is the maximum diameter D2 of the lid member 2. The diameter D23 of the circle forming the bottom surface of the circumferential groove 23 is the same as the minimum diameter D22a of the tapered portion 22a. The lid member 2 can be manufactured by cutting a cylindrical material made of a metal material such as steel, brass, or aluminum alloy.

図２（ｂ）に示すように、栓部材３は、円筒部３１と、円筒部３１の軸方向一端に形成された内向きフランジ部３２と、を有する。円筒部３１の軸方向他端部の外周面は、先端に向けて外径が小さくなるテーパ面となっている。つまり、円筒部３１は、軸方向他端部にテーパ部３１ａを有する。
円筒部３１の最大外径Ｄ３１は栓部材３の最大直径Ｄ３である。テーパ部３１ａの最小外径（円筒部３１の最小外径）Ｄ３１ａは、座ぐり部１４１の直径Ｚより僅かに小さい。円筒部３１の内径ｄ３１は、蓋部材２の円柱部２２の最大外径Ｄ２２より大きい。 As shown in FIG. 2B, the plug member 3 includes a cylindrical portion 31 and an inward flange portion 32 formed at one axial end of the cylindrical portion 31. The outer peripheral surface of the other axial end portion of the cylindrical portion 31 is a tapered surface whose outer diameter decreases toward the tip. That is, the cylindrical part 31 has the taper part 31a in the other axial end part.
The maximum outer diameter D31 of the cylindrical portion 31 is the maximum diameter D3 of the plug member 3. The minimum outer diameter (minimum outer diameter of the cylindrical portion 31) D31a of the tapered portion 31a is slightly smaller than the diameter Z of the counterbore portion 141. An inner diameter d31 of the cylindrical portion 31 is larger than the maximum outer diameter D22 of the columnar portion 22 of the lid member 2.

内向きフランジ部３２の内周面３２ａは、軸方向一端側（円筒部３１から離れる側）に向けて拡径するテーパ面となっている。つまり、内向きフランジ部３２はテーパ状の内周部３２ｂを有する。内向きフランジ部３２の最小内径ｄ３２は、蓋部材２の周溝２３の直径Ｄ２３より少し（例えば０．１ｍｍ〜０．５ｍｍ）大きく、蓋部材２の円板部２１の外径Ｄ２１より小さい。
内向きフランジ部３２の軸方向寸法ｔ３２は、蓋部材２の周溝２３の軸方向寸法ｔ２３より僅かに（例えば０．１ｍｍ〜０．２ｍｍ）大きい。内向きフランジ部３２の軸方向一端側の外周面３２ｃの直径Ｄ３２ｃは、円筒部３１の最小外径Ｄ３１ａより小さい。 The inner peripheral surface 32a of the inward flange portion 32 is a tapered surface that increases in diameter toward one end side in the axial direction (side away from the cylindrical portion 31). That is, the inward flange portion 32 has a tapered inner peripheral portion 32b. The minimum inner diameter d32 of the inward flange portion 32 is slightly larger (for example, 0.1 mm to 0.5 mm) than the diameter D23 of the circumferential groove 23 of the lid member 2 and smaller than the outer diameter D21 of the disc portion 21 of the lid member 2.
The axial dimension t32 of the inward flange portion 32 is slightly larger (for example, 0.1 mm to 0.2 mm) than the axial dimension t23 of the circumferential groove 23 of the lid member 2. The diameter D32c of the outer peripheral surface 32c on one end side in the axial direction of the inward flange portion 32 is smaller than the minimum outer diameter D31a of the cylindrical portion 31.

また、栓部材３の軸方向寸法と円板部２１の厚さとの合計寸法が、組み立て状態でのキャップ１の厚さ（軸方向寸法）となるため、円板部２１の厚さは、取り付け穴１４０のボルト１７より上側の軸方向寸法から栓部材３の軸方向寸法を引いた寸法より、僅かに（例えば０．１ｍｍ〜１ｍｍ）小さい寸法にしてある。
栓部材３は、ポリアセタールやポリアミドなどの熱可塑性樹脂や熱可塑性エラストマーを射出成形することで製造できる。
キャップ１を組み立てる際には、蓋部材２の円柱部２２を、内向きフランジ部３２側から栓部材３の円筒部３１に挿入する。その際に、円柱部２２のテーパ部２２ａが内向きフランジ部３２の内周面３２ａに案内され、内向きフランジ部３２の内周面３２ａが弾性変形により縮んで、円柱部２２が円筒部３１の中に入ることを許容する。 In addition, since the total dimension of the axial dimension of the plug member 3 and the thickness of the disk portion 21 becomes the thickness (axial dimension) of the cap 1 in the assembled state, The dimension is slightly smaller (for example, 0.1 mm to 1 mm) than the dimension obtained by subtracting the axial dimension of the plug member 3 from the axial dimension above the bolt 17 of the hole 140.
The plug member 3 can be manufactured by injection molding a thermoplastic resin such as polyacetal or polyamide, or a thermoplastic elastomer.
When the cap 1 is assembled, the column portion 22 of the lid member 2 is inserted into the cylindrical portion 31 of the plug member 3 from the inward flange portion 32 side. At that time, the tapered portion 22a of the cylindrical portion 22 is guided to the inner peripheral surface 32a of the inward flange portion 32, the inner peripheral surface 32a of the inward flange portion 32 is contracted by elastic deformation, and the cylindrical portion 22 is compressed into the cylindrical portion 31. Allow to enter.

また、内向きフランジ部３２の内周部３２ｂは、蓋部材２の周溝２３に対して、弾性変形により軸方向に縮んだ状態で嵌まる。なお、内向きフランジ部３２の軸方向寸法ｔ３２と蓋部材２の周溝２３の軸方向寸法ｔ２３を同じにした場合は、内向きフランジ部３２は縮まずに、内周部３２ｂが蓋部材２の周溝２３に接触した状態となる。つまり、栓部材３の寸法ｔ３２と蓋部材２の寸法ｔ２３との関係は、例えばｔ３２−ｔ２３＝０〜０．２ｍｍとする。 Further, the inner peripheral portion 32 b of the inward flange portion 32 is fitted into the peripheral groove 23 of the lid member 2 in a state of being contracted in the axial direction by elastic deformation. When the axial dimension t32 of the inward flange portion 32 and the axial dimension t23 of the circumferential groove 23 of the lid member 2 are the same, the inward flange portion 32 is not contracted and the inner circumferential portion 32b is the lid member 2. It will be in the state which contacted the surrounding groove 23. That is, the relationship between the dimension t32 of the plug member 3 and the dimension t23 of the lid member 2 is, for example, t32−t23 = 0 to 0.2 mm.

図１（ｂ）に示すキャップ１は、蓋部材２と栓部材３が設計値通りに製造されて、円板部２１と円筒部３１とに中心軸のずれがないものを、中心軸を合わせて組み立てたものである。
この状態でキャップ１には、全周に渡って、蓋部材２の円柱部２２と栓部材３の円筒部３１との間に、径方向の隙間Ｓ１が存在する。蓋部材２の周溝２３と栓部材３の内向きフランジ部３２の内周面３２ａとの間にも、径方向の隙間Ｓ２が存在する。隙間Ｓ２は隙間Ｓ１より小さい。また、蓋部材２および栓部材３との間に軸方向の隙間は存在しない。
つまり、キャップ１に組み立てられた状態で、蓋部材２および栓部材３は、軸方向での相対移動が阻害され、且つ、径方向での相対移動が許容された状態で結合されている。径方向での相対移動許容寸法は、隙間Ｓ２に内向きフランジ部３２の内周部３２ｂの弾性変形可能量を追加した寸法（これを「寸法Ａ」とする。）の二倍以下である。 The cap 1 shown in FIG. 1 (b) has a lid member 2 and a plug member 3 manufactured according to the design values, and the disc portion 21 and the cylindrical portion 31 have no center axis misalignment. Assembled.
In this state, the cap 1 has a radial gap S1 between the columnar portion 22 of the lid member 2 and the cylindrical portion 31 of the plug member 3 over the entire circumference. A radial gap S <b> 2 also exists between the circumferential groove 23 of the lid member 2 and the inner circumferential surface 32 a of the inward flange portion 32 of the plug member 3. The gap S2 is smaller than the gap S1. Further, there is no axial gap between the lid member 2 and the plug member 3.
That is, in the state assembled to the cap 1, the lid member 2 and the plug member 3 are coupled in a state in which relative movement in the axial direction is inhibited and relative movement in the radial direction is allowed. The relative movement allowable dimension in the radial direction is not more than twice the dimension obtained by adding the elastically deformable amount of the inner peripheral portion 32b of the inward flange portion 32 to the gap S2 (this is referred to as “dimension A”).

図３は、このキャップ１を案内レール１１０の取り付け穴１４０に取り付けた状態を示す。
案内レール１１０を基台（被取付部）１６０に固定する際には、先ず、基台１６０の上に案内レール１１０を置き、基台１６０の取り付け穴の雌ねじ部１６１と、案内レール１１０の取り付け穴１４０の軸収納部１４２を合わせる。この状態で、案内レール１１０の取り付け穴１４０からボルト１７を入れて、軸部の雄ねじを、基台１６０の雌ねじ部１６１に螺合し、頭部を座ぐり部１４１の面１４１ａに当てて締めつける。これにより、案内レール１１０が基台１６０にボルト１７で固定される。 FIG. 3 shows a state in which the cap 1 is attached to the attachment hole 140 of the guide rail 110.
When the guide rail 110 is fixed to the base (attached portion) 160, the guide rail 110 is first placed on the base 160, and the female thread portion 161 of the mounting hole of the base 160 and the guide rail 110 are attached. The shaft storage part 142 of the hole 140 is aligned. In this state, the bolt 17 is inserted from the mounting hole 140 of the guide rail 110, the male screw of the shaft portion is screwed into the female screw portion 161 of the base 160, and the head is brought into contact with the surface 141a of the counterbore portion 141 and tightened. . Thereby, the guide rail 110 is fixed to the base 160 with the bolts 17.

次に、栓部材３の円筒部３１のテーパ部３１ａをボルト１７に向けて、キャップ１を案内レール１１０の面取り部１４３の上に置き、円板部２１の上面が案内レール１１０の上面１１１と同じ面になるまで、ハンマー等でキャップ１の上を叩く。これにより、円筒部３１の外周縁部（厳密には、テーパ部３１ａの直径がＺ以下である部分を除いた部分）が弾性変形しながら、キャップ１が面取り部１４３および座ぐり部１４１に入る。その際に、テーパ部３１ａが面取り部１４３に案内される。 Next, the cap 1 is placed on the chamfered portion 143 of the guide rail 110 with the tapered portion 31 a of the cylindrical portion 31 of the plug member 3 facing the bolt 17, and the upper surface of the disc portion 21 is in contact with the upper surface 111 of the guide rail 110. Tap the top of the cap 1 with a hammer until it is on the same surface. Thereby, the cap 1 enters the chamfered portion 143 and the counterbore portion 141 while the outer peripheral edge portion of the cylindrical portion 31 (strictly, the portion excluding the portion where the diameter of the tapered portion 31a is equal to or smaller than Z) is elastically deformed. . At that time, the tapered portion 31 a is guided to the chamfered portion 143.

その結果、蓋部材２の円板部２１が、面取り部１４３および座ぐり部１４１に隙間を介して配置され、栓部材３は、円筒部３１の外周縁部が弾性変形状態で座ぐり部１４１に配置される。つまり、キャップ１では、円筒部３１の外周縁部が、座ぐり部１４１に弾性変形状態で配置される円周部に相当する。また、円板部２１の上面が案内レール１１０の上面１１１と同じになり、ボルト１７とキャップ１との間に隙間が存在する。 As a result, the disc portion 21 of the lid member 2 is disposed in the chamfered portion 143 and the counterbore portion 141 via a gap, and the plug member 3 has the counterbore portion 141 with the outer peripheral edge portion of the cylindrical portion 31 being elastically deformed. Placed in. That is, in the cap 1, the outer peripheral edge portion of the cylindrical portion 31 corresponds to a circumferential portion disposed in the counterbore portion 141 in an elastically deformed state. Further, the upper surface of the disc portion 21 is the same as the upper surface 111 of the guide rail 110, and a gap exists between the bolt 17 and the cap 1.

このように、第一実施形態のキャップ１は、案内レール１１０の取り付け穴１４０の座ぐり部１４１に対して、容易に且つ確実に取り付けることができる。また、金属製の円板部２１が座ぐり部１４１の案内レール１１０の上面１１１側に配置されるため、キャップ１は破損されにくい。また、蓋部材２および栓部材３の軸方向での相対移動が阻害されているため、蓋部材２が栓部材３から浮き上がりにくい。 Thus, the cap 1 of the first embodiment can be easily and reliably attached to the counterbore part 141 of the attachment hole 140 of the guide rail 110. Moreover, since the metal disc part 21 is arrange | positioned at the upper surface 111 side of the guide rail 110 of the counterbore part 141, the cap 1 is hard to be damaged. Further, since the relative movement in the axial direction of the lid member 2 and the plug member 3 is hindered, the lid member 2 is unlikely to lift from the plug member 3.

図４（ａ）に示すように、製造された蓋部材２が、円板部２１の中心軸Ｏ１と突起部２２の中心軸Ｏ２とにずれδを有する場合、図４（ｂ）に示すように、円筒部３１の中心軸Ｏ３と突起部２２の中心軸Ｏ２とを合わせてキャップ１を組み立てると、円筒部３１の中心軸Ｏ３と円板部２１の中心軸Ｏ１との間にずれδが生じる。この場合には、蓋部材２と栓部材３を径方向に相対移動させることで、円筒部３１の中心軸Ｏ３と円板部２１の中心軸Ｏ１のずれδを無くすか小さくすることができる。 As shown in FIG. 4A, when the manufactured lid member 2 has a deviation δ between the central axis O1 of the disc portion 21 and the central axis O2 of the projection portion 22, as shown in FIG. Further, when the cap 1 is assembled by aligning the central axis O3 of the cylindrical portion 31 and the central axis O2 of the protruding portion 22, there is a deviation δ between the central axis O3 of the cylindrical portion 31 and the central axis O1 of the disc portion 21. Arise. In this case, the displacement δ between the central axis O3 of the cylindrical portion 31 and the central axis O1 of the disc portion 21 can be eliminated or reduced by relatively moving the lid member 2 and the plug member 3 in the radial direction.

つまり、第一実施形態のキャップ１によれば、蓋部材２と栓部材３の中心軸間のずれδが寸法Ａ以下であれば、図５に示すように、円板部２１が座ぐり部１４１と干渉することなく、キャップ１を座ぐり部１４１に正しく取り付けることができる。
このように、第一実施形態のキャップ１は、蓋部材２と栓部材３の中心軸間のずれが吸収できる構造であるため、特許文献１および２に記載されたキャップと比較して、各部品の製造精度を低くしても不良品が少なくなる分だけ、製造コストが低減できる。 That is, according to the cap 1 of the first embodiment, if the deviation δ between the central axes of the lid member 2 and the plug member 3 is not more than the dimension A, the disk portion 21 is countersunk as shown in FIG. The cap 1 can be correctly attached to the counterbore 141 without interfering with the counter 141.
Thus, since the cap 1 of 1st embodiment is a structure which can absorb the shift | offset | difference between the center axis | shafts of the cover member 2 and the plug member 3, compared with the cap described in patent document 1 and 2, Even if the manufacturing accuracy of the parts is lowered, the manufacturing cost can be reduced by the amount of defective products.

［第二実施形態］
図６（ａ）（ｂ）に示すように、第二実施形態のキャップ４は、金属製の蓋部材５と合成樹脂製の栓部材６とからなる。図６（ｃ）に示すように、直動案内装置の案内レール１１０には、上面１１１から下面１１２に貫通する取り付け穴１４０が形成されている。取り付け穴１４０は、ボルトの頭部を収める座ぐり部１４１と、ボルトの軸部を収める軸収納部１４２とからなり、座ぐり部１４１の上端に面取り部１４３が形成されている。
蓋部材５の最大直径Ｄ５は、軸部１４２の直径Ｊより大きく、座ぐり部１４１の直径Ｚより少し（例えば０．１〜０．５ｍｍ）小さい。栓部材６の最大直径Ｄ６は、座ぐり部１４１の直径Ｚより少し（例えば０．１〜０．５ｍｍ）大きく、面取り部１４３の最大直径Ｍより小さい。 [Second Embodiment]
As shown in FIGS. 6A and 6B, the cap 4 according to the second embodiment includes a metal lid member 5 and a synthetic resin plug member 6. As shown in FIG. 6C, the guide rail 110 of the linear guide apparatus is formed with an attachment hole 140 penetrating from the upper surface 111 to the lower surface 112. The mounting hole 140 includes a counterbore portion 141 for storing the bolt head portion and a shaft storage portion 142 for storing the shaft portion of the bolt, and a chamfered portion 143 is formed at the upper end of the counterbore portion 141.
The maximum diameter D5 of the lid member 5 is larger than the diameter J of the shaft portion 142 and slightly smaller than the diameter Z of the spot facing portion 141 (for example, 0.1 to 0.5 mm). The maximum diameter D6 of the plug member 6 is slightly larger (for example, 0.1 to 0.5 mm) than the diameter Z of the counterbore part 141 and smaller than the maximum diameter M of the chamfered part 143.

図７（ａ）および図８（ａ）に示すように、蓋部材５は、円板部５１と一対の縦板部５２と一対の横板部５３とを有する。一対の縦板部５２は、円板部５１の直径方向両端部から軸方向に延びる。縦板部５２の外側面は、円板部５１の外周面と同じ円周面であり、縦板部５２の内側面は、円板部５１と同心で円板部５１より径の小さい円周面である。
一対の横板部５３は、一対の縦板部５２の先端からそれぞれ円板部５１の径方向中心側に延びる。円板部５１と縦板部５２との境界部分は、円板部５１の縦板部５２が延びる直径方向両端の縁部に切欠きがあり、その対向する切欠き面５１ａ間に縦板部５２の屈曲部５２ａが配置された形状を有する。
一対の縦板部５２の外側面間の距離Ｄ５２は、蓋部材５の最大直径Ｄ５である。円板部５１の直径Ｄ５１と一対の縦板部５２の外側面間の距離Ｄ５２は同じである。蓋部材５は、鋼板やアルミニウム板などの金属板をプレス加工で成形することで得られる。 As shown in FIG. 7A and FIG. 8A, the lid member 5 has a disc portion 51, a pair of vertical plate portions 52, and a pair of horizontal plate portions 53. The pair of vertical plate portions 52 extend in the axial direction from both ends in the diameter direction of the disc portion 51. The outer side surface of the vertical plate portion 52 is the same circumferential surface as the outer peripheral surface of the disc portion 51, and the inner side surface of the vertical plate portion 52 is concentric with the disc portion 51 and has a smaller diameter than the disc portion 51. Surface.
The pair of horizontal plate portions 53 extend from the distal ends of the pair of vertical plate portions 52 to the center side in the radial direction of the disk portion 51. The boundary portion between the disc portion 51 and the longitudinal plate portion 52 has notches at the edges at both ends in the diameter direction in which the longitudinal plate portion 52 of the disc portion 51 extends, and the longitudinal plate portion is provided between the opposed notch surfaces 51a. It has a shape in which 52 bent portions 52a are arranged.
A distance D52 between the outer surfaces of the pair of vertical plate portions 52 is the maximum diameter D5 of the lid member 5. The diameter D51 of the disc portion 51 and the distance D52 between the outer surfaces of the pair of vertical plate portions 52 are the same. The lid member 5 is obtained by forming a metal plate such as a steel plate or an aluminum plate by press working.

図７（ｂ）および図８（ｂ）に示すように、栓部材６は円柱体からなり、軸方向一端側の小径部６１と、軸方向他端側の大径部６２に分けられる。小径部６１の端面（円柱体の軸方向一端面）６１ａの角部は、面取りされてテーパ面６１ｂとなっている。
大径部６２の軸方向他端部の外周面は、先端に向けて外径が小さくなるテーパ面となっている。つまり、大径部６２は、軸方向他端部にテーパ部６２ａを有する。大径部６２の直径方向両端部に、蓋部材５を結合する一対の結合部６３が形成されている。各結合部６３は、蓋部材５の縦板部５２が嵌まる凹部６３１と、横板部５３が嵌まる嵌合面６３２とからなる。凹部６３１は、対向する一対の壁面６３１ｂと、底面６３１ａとからなり、底面６３１ａは小径部６１の外周面に相当する。 As shown in FIGS. 7B and 8B, the plug member 6 is formed of a cylindrical body, and is divided into a small diameter portion 61 on one end side in the axial direction and a large diameter portion 62 on the other end side in the axial direction. A corner of an end surface (one end surface in the axial direction of the cylindrical body) 61a of the small diameter portion 61 is chamfered to form a tapered surface 61b.
The outer peripheral surface of the other axial end portion of the large diameter portion 62 is a tapered surface whose outer diameter decreases toward the tip. That is, the large diameter portion 62 has a tapered portion 62a at the other axial end portion. A pair of coupling portions 63 for coupling the lid member 5 are formed at both ends in the diameter direction of the large diameter portion 62. Each coupling portion 63 includes a concave portion 631 into which the vertical plate portion 52 of the lid member 5 is fitted, and a fitting surface 632 into which the horizontal plate portion 53 is fitted. The recess 631 includes a pair of opposing wall surfaces 631 b and a bottom surface 631 a, and the bottom surface 631 a corresponds to the outer peripheral surface of the small diameter portion 61.

嵌合面６３２は、凹部６３１に連続して、大径部６２の軸方向端面（円柱体の軸方向他端面）６２ｂに形成された段差面である。栓部材６は、この段差分だけ軸方向に延びる一対の平面６３３を有する。これらの平面６３３間の距離Ｄ６３３は、一対の横板部５３の対向面間距離ｄ５３より小さい。栓部材６の軸方向最大寸法ｔ６（つまり、小径部６１の端面６１ａと大径部６２の端面６２ｂとの距離）は、円板部５１の下面と横板部５３の下面との距離ｔ５と同じである。
また、距離ｔ５と円板部５１の厚さとの合計寸法が、組み立て状態でのキャップ４の厚さ（軸方向寸法）となるため、円板部５１の厚さは、取り付け穴１４０のボルト１７より上側の軸方向寸法から距離ｔ５を引いた寸法より、僅かに（例えば０．１ｍｍ〜１ｍｍ）小さい寸法にしてある。 The fitting surface 632 is a stepped surface formed on the axial end surface (the other axial end surface of the cylindrical body) 62 b of the large diameter portion 62 continuously from the recess 631. The plug member 6 has a pair of flat surfaces 633 extending in the axial direction by this level difference. A distance D633 between the flat surfaces 633 is smaller than the distance d53 between the opposing surfaces of the pair of horizontal plate portions 53. The axial maximum dimension t6 of the plug member 6 (that is, the distance between the end surface 61a of the small diameter portion 61 and the end surface 62b of the large diameter portion 62) is the distance t5 between the lower surface of the disc portion 51 and the lower surface of the horizontal plate portion 53. The same.
In addition, since the total dimension of the distance t5 and the thickness of the disc portion 51 is the thickness of the cap 4 in the assembled state (dimension in the axial direction), the thickness of the disc portion 51 is the bolt 17 of the mounting hole 140. The dimension is slightly smaller (for example, 0.1 mm to 1 mm) than the dimension obtained by subtracting the distance t5 from the upper axial dimension.

大径部６２の最大直径Ｄ６２は栓部材６の最大直径Ｄ６である。一対の凹部６３１の底面６３１ａ間の寸法Ｄ６３１（つまり、小径部６１の最大直径Ｄ６１）は、一対の縦板部５２の対向面間の寸法ｄ５２より小さい。嵌合面６３２と小径部６１の端面６１ａとの距離ｔ６３は、円板部５１と横板５３との対向面間隔ｔ５２より僅かに（例えば０．１ｍｍ〜０．２ｍｍ）大きい。
栓部材６は、ポリアセタールやポリアミドなどの熱可塑性樹脂や熱可塑性エラストマーを射出成形することで製造できる。 The maximum diameter D62 of the large diameter portion 62 is the maximum diameter D6 of the plug member 6. The dimension D631 between the bottom surfaces 631a of the pair of recesses 631 (that is, the maximum diameter D61 of the small diameter part 61) is smaller than the dimension d52 between the opposing surfaces of the pair of vertical plate parts 52. The distance t63 between the fitting surface 632 and the end surface 61a of the small diameter portion 61 is slightly larger (for example, 0.1 mm to 0.2 mm) than the facing surface interval t52 between the disc portion 51 and the lateral plate 53.
The plug member 6 can be manufactured by injection molding a thermoplastic resin such as polyacetal or polyamide, or a thermoplastic elastomer.

キャップ４を組み立てる際には、蓋部材５の横板部５３側を栓部材６の端面６１ａに向け、横板部５３と栓部材６の凹部６３１の位置を合わせて、蓋部材５を栓部材６の上に押しつける。これにより、屈曲部５２ａが弾性変形により開いて、縦板部５２が凹部６３１に嵌まり、横板部５３が栓部材６の嵌合面６３２に嵌まる。
この状態で、小径部６１の円板部５１と横板部５３との間に挟まれた部分は、弾性変形により軸方向に縮んだ状態となっている。なお、栓部材６の嵌合面６３２と端面６１ａとの距離ｔ６３を、蓋部材５の円板部５１と横板５３との対向面間隔ｔ５２と同じにした場合は、小径部６１は縮まずに、円板部５１と横板部５３に接触した状態となる。つまり、蓋部材５の間隔ｔ５２と栓部材６の距離ｔ６３との関係は、例えばｔ５２−ｔ６３＝０〜０．２ｍｍとする。 When assembling the cap 4, the side plate 53 side of the lid member 5 is directed to the end surface 61 a of the plug member 6, and the positions of the horizontal plate portion 53 and the concave portion 631 of the plug member 6 are aligned. Press on top of 6. As a result, the bent portion 52 a is opened by elastic deformation, the vertical plate portion 52 is fitted into the concave portion 631, and the horizontal plate portion 53 is fitted into the fitting surface 632 of the plug member 6.
In this state, the portion sandwiched between the disc portion 51 and the lateral plate portion 53 of the small diameter portion 61 is in a state of being contracted in the axial direction by elastic deformation. When the distance t63 between the fitting surface 632 and the end surface 61a of the plug member 6 is the same as the facing surface interval t52 between the disc portion 51 and the lateral plate 53 of the lid member 5, the small diameter portion 61 does not shrink. In addition, the disk portion 51 and the horizontal plate portion 53 are in contact with each other. That is, the relationship between the interval t52 of the lid member 5 and the distance t63 of the plug member 6 is, for example, t52−t63 = 0 to 0.2 mm.

図６（ｂ）に示すキャップ４は、蓋部材５と栓部材６が設計値通りに製造されて、円板部５１と大径部６２とに中心軸のずれがないものを、中心軸を合わせて組み立てたものである。
この状態で、キャップ４には、蓋部材５の縦板部５２と栓部材６の底面６３１ａとの間に、それぞれ径方向の隙間Ｓ３が存在し、横板部５３と平面６３３との間にもそれぞれ径方向の隙間Ｓ４が存在する。隙間Ｓ３は隙間Ｓ４より小さい。また、蓋部材５および栓部材６に軸方向の隙間は存在しない。
つまり、キャップ４に組み立てられた状態で、蓋部材５および栓部材６は、軸方向での相対移動が阻害され、且つ、径方向での相対移動が許容された状態で結合されている。径方向での相対移動許容寸法は、隙間Ｓ３に小径部６１の弾性変形可能量を追加した寸法（これを「寸法Ｂ」とする。）の二倍以下である。 The cap 4 shown in FIG. 6B has a lid member 5 and a plug member 6 manufactured according to design values, and the disc portion 51 and the large-diameter portion 62 have no center axis deviation. They are assembled together.
In this state, the cap 4 has a radial gap S3 between the vertical plate portion 52 of the lid member 5 and the bottom surface 631a of the plug member 6, and between the horizontal plate portion 53 and the flat surface 633. Each also has a radial gap S4. The gap S3 is smaller than the gap S4. Further, there is no axial gap between the lid member 5 and the plug member 6.
That is, in the state assembled to the cap 4, the lid member 5 and the plug member 6 are coupled in a state where relative movement in the axial direction is inhibited and relative movement in the radial direction is allowed. The relative movement allowable dimension in the radial direction is not more than twice the dimension obtained by adding the elastically deformable amount of the small diameter portion 61 to the gap S3 (this is referred to as “dimension B”).

また、組み立てられたキャップ４において、栓部材６の小径部６１の端面（円柱体の軸方向一端面）６１ａが蓋部材５の円板部５１に接触し、栓部材６の大径部６２の軸方向端面６２ｂが蓋部材５の横板部５３の下面と一致する。
図９は、このキャップ４を案内レール１１０の取り付け穴１４０に取り付けた状態を示す。
案内レール１１０を基台（被取付部）１６０に固定する際には、先ず、基台１６０の上に案内レール１１０を置き、基台１６０の取り付け穴の雌ねじ部１６１と、案内レール１１０の取り付け穴１４０の軸収納部１４２を合わせる。この状態で、案内レール１１０の取り付け穴１４０からボルト１７を入れて、軸部の雄ねじを、基台１６０の雌ねじ部１６１に螺合し、頭部を座ぐり部１４１の面１４１ａに当てて締めつける。これにより、案内レール１１０が基台１６０にボルト１７で固定される。 Further, in the assembled cap 4, the end surface (one end surface in the axial direction of the cylindrical body) 61 a of the small-diameter portion 61 of the plug member 6 contacts the disc portion 51 of the lid member 5, and the large-diameter portion 62 of the plug member 6 The axial end surface 62 b coincides with the lower surface of the horizontal plate portion 53 of the lid member 5.
FIG. 9 shows a state where the cap 4 is attached to the attachment hole 140 of the guide rail 110.
When the guide rail 110 is fixed to the base (attached portion) 160, the guide rail 110 is first placed on the base 160, and the female thread portion 161 of the mounting hole of the base 160 and the guide rail 110 are attached. The shaft storage part 142 of the hole 140 is aligned. In this state, the bolt 17 is inserted from the mounting hole 140 of the guide rail 110, the male screw of the shaft portion is screwed into the female screw portion 161 of the base 160, and the head is brought into contact with the surface 141a of the counterbore portion 141 and tightened. . Thereby, the guide rail 110 is fixed to the base 160 with the bolts 17.

次に、栓部材６の大径部６２のテーパ部６２ａをボルト１７に向けて、キャップ４を案内レール１１０の面取り部１４３の上に置き、円板部５１の上面が案内レール１１０の上面１１１と同じ面になるまで、ハンマー等でキャップ１の上を叩く。これにより、大径部６２の外周縁部（厳密には、テーパ部６２ａの直径がＺ以下である部分を除いた部分）が弾性変形しながら、キャップ４が面取り部１４３および座ぐり部１４１に入る。その際に、テーパ部６２ａが面取り部１４３に案内される。 Next, the cap 4 is placed on the chamfered portion 143 of the guide rail 110 with the tapered portion 62a of the large diameter portion 62 of the plug member 6 facing the bolt 17, and the upper surface of the disc portion 51 is the upper surface 111 of the guide rail 110. Hit the top of the cap 1 with a hammer until it becomes the same surface. As a result, the cap 4 is moved to the chamfered portion 143 and the counterbore portion 141 while the outer peripheral edge portion of the large diameter portion 62 (strictly, the portion excluding the portion where the diameter of the tapered portion 62a is equal to or smaller than Z) is elastically deformed. enter. At that time, the tapered portion 62 a is guided to the chamfered portion 143.

その結果、蓋部材５の円板部５１が、面取り部１４３および座ぐり部１４１に隙間を介して配置され、栓部材６は、大径部６２の外周縁部が弾性変形状態で座ぐり部１４１に配置される。つまり、キャップ４では、大径部６２の外周縁部が、座ぐり部１４１に弾性変形状態で配置される円周部に相当する。また、円板部５１の上面が案内レール１１０の上面１１１と同じになり、ボルト１７とキャップ４との間に隙間が存在する。 As a result, the disc portion 51 of the lid member 5 is disposed in the chamfered portion 143 and the counterbore portion 141 with a gap therebetween, and the plug member 6 has a counterbore portion with the outer peripheral edge portion of the large-diameter portion 62 in an elastically deformed state. 141. That is, in the cap 4, the outer peripheral edge portion of the large-diameter portion 62 corresponds to a circumferential portion that is arranged in the counterbore portion 141 in an elastically deformed state. Further, the upper surface of the disc portion 51 is the same as the upper surface 111 of the guide rail 110, and there is a gap between the bolt 17 and the cap 4.

このように、第二実施形態のキャップ４は、案内レール１１０の取り付け穴１４０の座ぐり部１４１に対して、容易に且つ確実に取り付けることができる。また、金属製の円板部５１が座ぐり部１４１の案内レール１１０の上面１１１側に配置されるため、キャップ１は破損されにくい。また、蓋部材５および栓部材６の軸方向での相対移動が阻害されているため、蓋部材５が栓部材６から浮き上がりにくい。 Thus, the cap 4 of the second embodiment can be easily and reliably attached to the counterbore part 141 of the attachment hole 140 of the guide rail 110. Moreover, since the metal disc part 51 is arrange | positioned at the upper surface 111 side of the guide rail 110 of the counterbore part 141, the cap 1 is hard to be damaged. Further, since the relative movement in the axial direction of the lid member 5 and the plug member 6 is hindered, the lid member 5 is difficult to lift from the plug member 6.

また、第二実施形態のキャップ４によれば、製造された蓋部材５の円板部２１の中心軸と、栓部材６の小径部６１および大径部６２の中心軸がずれていた場合、蓋部材５と栓部材６を径方向に相対移動させることで、そのずれを無くすか小さくすることができる。
その結果、第二実施形態のキャップ４によれば、蓋部材５と栓部材６の中心軸がずれている場合でも、ずれ量が寸法Ｂ以下であれば、円板部５１が座ぐり部１４１と干渉することなく、キャップ４を座ぐり部１４１に正しく取り付けることができる。 Further, according to the cap 4 of the second embodiment, when the central axis of the disc portion 21 of the manufactured lid member 5 and the central axes of the small diameter portion 61 and the large diameter portion 62 of the plug member 6 are shifted, By moving the lid member 5 and the plug member 6 relative to each other in the radial direction, the deviation can be eliminated or reduced.
As a result, according to the cap 4 of the second embodiment, even when the central axes of the lid member 5 and the plug member 6 are deviated, if the deviation amount is equal to or less than the dimension B, the disc part 51 is counterbore part 141. The cap 4 can be correctly attached to the counterbore 141 without interfering with the counterbore.

このように、第二実施形態のキャップ４は、蓋部材５と栓部材６の中心軸間のずれが吸収できる構造であるため、特許文献１および２に記載されたキャップと比較して、各部品の製造精度を低くしても不良品が少なくなる分だけ、製造コストが低減できる。
また、第二実施形態のキャップ４では、蓋部材５をプレス加工により製造することができるため、切削加工で製造された蓋部材２を用いる第一実施形態のキャップ１よりも製造コストが低減できる。 Thus, since the cap 4 of the second embodiment has a structure that can absorb the deviation between the central axes of the lid member 5 and the plug member 6, each cap 4 is compared with the caps described in Patent Documents 1 and 2. Even if the manufacturing accuracy of the parts is lowered, the manufacturing cost can be reduced by the amount of defective products.
Moreover, in the cap 4 of 2nd embodiment, since the cover member 5 can be manufactured by press work, manufacturing cost can be reduced rather than the cap 1 of 1st embodiment using the cover member 2 manufactured by cutting. .

なお、第二実施形態のキャップ４は、蓋部材５が一対の縦板部５２および横板部５３を有し、栓部材６が凹部６３１と嵌合面６３２とからなる結合部を一対有しているが、蓋部材５が複数対の縦板部５２および横板部５３を有し、栓部材６が凹部６３１と嵌合面６３２とからなる結合部を複数対有するキャップも本発明に含まれる。
また、第二実施形態のキャップ４では、大径部（円柱体）６２の端面６２ｂが横板部５３の下面と一致しているが、大径部（円柱体）６２の端面６２ｂは横板部５３の下面より上側になっていてもよい。 In the cap 4 according to the second embodiment, the lid member 5 has a pair of vertical plate portions 52 and a horizontal plate portion 53, and the plug member 6 has a pair of coupling portions each including a concave portion 631 and a fitting surface 632. However, the present invention also includes a cap in which the lid member 5 has a plurality of pairs of vertical plate portions 52 and horizontal plate portions 53, and the plug member 6 has a plurality of pairs of coupling portions each including a concave portion 631 and a fitting surface 632. It is.
Further, in the cap 4 of the second embodiment, the end surface 62b of the large diameter portion (cylindrical body) 62 coincides with the lower surface of the horizontal plate portion 53, but the end surface 62b of the large diameter portion (cylindrical body) 62 is the horizontal plate. It may be above the lower surface of the portion 53.

１キャップ
２蓋部材
２１円板部
２２円柱部
２２ａ円柱部２２のテーパ部
２３周溝
３栓部材
３１円筒部
３１ａ円筒部３１のテーパ部
３２内向きフランジ部
３２ａ内向きフランジ部の内周面
３２ｂ内向きフランジ部のテーパ状の内周部
３２ｃ内向きフランジ部の軸方向一端側の外周面
４キャップ
５蓋部材
５１円板部
５１ａ円板部の切欠き面
５２縦板部
５２ａ縦板部５２の屈曲部
５３横板部
６栓部材
６１小径部（栓部材６をなす円柱体の軸方向一端側の部分）
６２大径部（栓部材６をなす円柱体の軸方向他端側の部分）
６１ａ小径部６１の端面（円柱体の軸方向一端面）
６１ｂテーパ面（小径部６１の角部）
６２ａ大径部６２のテーパ部
６２ｂ大径部６２の軸方向端面（円柱体の軸方向他端面）
６３結合部
６３１凹部
６３１ａ凹部の底面（小径部６１の外周面）
６３１ｂ凹部の壁面
６３２嵌合面
６３３横板部５３が対向する平面
１００直動案内装置
１１０案内レール
１１１案内レールの上面
１１２案内レールの下面
１１３案内レールの転動面
１２０スライダ
１２１スライダの転動面
１２２戻し通路
１３０転動体
１４０案内レールの取り付け穴
１４１座ぐり部
１４２軸収納部
１４３面取り部
Ｄ２蓋部材２の最大直径
Ｄ２１円板部２１の直径
Ｄ２２円柱部２２の最大外径
Ｄ２３周溝の底面をなす円の直径
Ｄ２２ａテーパ部２２ａの最小直径
Ｄ３栓部材３の最大直径
Ｄ３１円筒部３１の最大外径
Ｄ３１ａテーパ部３１ａの最小外径（円筒部３１の最小外径）
Ｄ３２ｃ内向きフランジ部の軸方向一端側の外周面の直径
Ｄ５蓋部材５の最大直径
Ｄ５１円板部５１の直径
Ｄ５２一対の縦板部５２の外側面間の距離
Ｄ６栓部材６の最大直径
Ｄ６１小径部６１の最大直径
Ｄ６２大径部６２の最大直径
Ｄ６３１一対の凹部６３１の底面６３１ａ間の寸法
Ｄ６３３平面６３３間の距離
ｄ３１円筒部３１の内径
ｄ３２内向きフランジ部の最小内径
ｄ５２一対の縦板部５２の対向面間の寸法
ｄ５３一対の横板部５３の対向面間距離
Ｊ軸部の直径
Ｍ面取り部の最大直径
Ｏ１円板部２１の中心軸
Ｏ２突起部２２の中心軸
Ｏ３円筒部３１の中心軸
ｔ３２内向きフランジ部の軸方向寸法
ｔ２３周溝の軸方向寸法
ｔ５円板部５１の下面と横板部５３の下面との距離
ｔ５２円板部５１と横板５３との対向面間隔
ｔ６栓部材６の軸方向最大寸法
ｔ６３嵌合面６３２と小径部６１の端面６１ａとの距離
Ｚ座ぐり部の直径
δ 中心軸のずれ DESCRIPTION OF SYMBOLS 1 Cap 2 Lid member 21 Disk part 22 Column part 22a Tapered part of the column part 23 Circumferential groove 3 Plug member 31 Cylindrical part 31a Tapered part of the cylindrical part 31 32 Inward flange part 32a Inner peripheral surface 32b of an inward flange part Tapered inner peripheral portion 32c of the inward flange portion 32c Outer peripheral surface on one end side in the axial direction of the inward flange portion 4 Cap 5 Lid member 51 Disc portion 51a Notch surface of the disc portion 52 Vertical plate portion 52a Vertical plate portion 52 Bent part 53 Horizontal plate part 6 Plug member 61 Small diameter part (Axial one end side portion of cylindrical body forming plug member 6)
62 Large-diameter portion (the portion on the other end side in the axial direction of the cylindrical body forming the plug member 6)
61a End surface of the small-diameter portion 61 (one axial end surface of the cylindrical body)
61b Tapered surface (corner part of small diameter part 61)
62a Tapered portion of the large diameter portion 62 62b Axial end surface of the large diameter portion 62 (the other axial end surface of the cylindrical body)
63 Coupling part 631 Concave part 631a Bottom face of the concave part (outer peripheral surface of the small diameter part 61)
631b Wall surface of concave portion 632 Fitting surface 633 Plane facing horizontal plate portion 53 100 Linear motion guide device 110 Guide rail 111 Upper surface of guide rail 112 Lower surface of guide rail 113 Rolling surface of guide rail 120 Slider 121 Rolling surface of slider 122 Return path 130 Rolling element 140 Guide rail mounting hole 141 Counterbore part 142 Shaft receiving part 143 Chamfering part D2 Maximum diameter of lid member 2 D21 Diameter of disk part 21 D22 Maximum outer diameter of cylindrical part D23 Bottom surface of circumferential groove D22a Minimum diameter of taper portion 22a D3 Maximum diameter of plug member 3 D31 Maximum outer diameter of cylindrical portion 31 D31a Minimum outer diameter of tapered portion 31a (minimum outer diameter of cylindrical portion 31)
D32c Diameter of outer peripheral surface on one axial end side of inward flange portion D5 Maximum diameter of lid member 5 D51 Diameter of disk portion 51 D52 Distance between outer surfaces of pair of vertical plate portions D6 Maximum diameter of plug member 6 D61 Maximum diameter of small-diameter portion 61 D62 Maximum diameter of large-diameter portion 62 D631 Dimension between bottom surface 631a of pair of recesses 631 D633 Distance between planes 633 d31 Inner diameter of cylindrical portion 31 d32 Minimum inner diameter of inward flange portion d52 Pair of vertical plates Dimension between facing surfaces of portion 52 d53 Distance between facing surfaces of a pair of horizontal plate portions J Diameter of shaft portion M Maximum diameter of chamfered portion O1 Central axis of disc portion 21 Central axis of projecting portion O3 Cylindrical portion 31 T32 axial dimension of the inward flange portion t23 axial dimension of the circumferential groove t5 distance between the lower surface of the disc portion 51 and the lower surface of the lateral plate portion 53 t52 between the disc portion 51 and the lateral plate 53 Opposite surface spacing t6 Maximum axial dimension of plug member 6 t63 Distance between fitting surface 632 and end surface 61a of small diameter portion 61 Z Diameter of counterbore portion δ Deviation of central axis

Claims

A cap provided to attach the guide rail of the linear motion guide device to the attached portion with a bolt, and closes a spot facing portion of an attachment hole penetrating from the upper surface to the lower surface of the guide rail,
It consists of a metal lid member and a synthetic resin plug member,
The lid member has a disc portion disposed through a predetermined gap in the counterbore portion,
The plug member has a circumferential portion arranged in an elastically deformed state on the counterbore portion,
The disc portion is disposed on the upper surface side of the counterbore portion rather than the circumferential portion,
The cap for a linear motion guide device in which the lid member and the plug member are coupled in a state in which relative movement is inhibited in the axial direction of the disc portion and allowed in the radial direction of the disc portion.

The guide rail of the linear guide equipment are provided for attachment to the attachment portion by bolts, a cap for closing the counterbored portion of the mounting hole penetrating from the upper surface to the lower surface of the guide rail,
It consists of a metal lid member and a synthetic resin plug member,
The lid member is a boundary between a disc portion disposed in the spot facing portion with a predetermined gap, a columnar portion protruding from one axial surface of the disc portion, and the disc portion of the columnar portion. And a circumferential groove provided in
The plug member has a cylindrical portion whose inner diameter is larger than the outer diameter of the columnar portion and whose outer diameter is larger than the diameter of the counterbore portion, and an inward flange portion formed at one axial end of the cylindrical portion. And
The inner diameter of the inward flange portion is larger than the diameter of the circle forming the bottom of the circumferential groove, and smaller than the outer diameter of the disc portion,
The axial dimension of the inward flange portion is the same as or larger than the axial dimension of the circumferential groove,
The lid member and the plug are formed by inserting the column portion into the cylindrical portion from the inward flange portion side, and fitting an inner peripheral portion of the inward flange portion into the peripheral groove in an axially elastically deformed state. The member is a cap for a linear motion guide device in which relative movement in the axial direction of the disk portion is inhibited and relative movement in the radial direction of the disk portion is allowed.

The guide rail of the linear guide equipment are provided for attachment to the attachment portion by bolts, a cap for closing the counterbored portion of the mounting hole penetrating from the upper surface to the lower surface of the guide rail,
It consists of a metal lid member and a synthetic resin plug member,
The lid member includes a disc portion disposed in the spot facing portion with a predetermined gap, a pair or a plurality of pairs of vertical plate portions extending in the axial direction from both ends in the diameter direction of the disc portion, and the pair Or a pair or a plurality of pairs of horizontal plates extending from the front ends of the plurality of pairs of vertical plates to the radial center of the disk portion, respectively.
The plug member is formed of a cylindrical body having a circumferential portion disposed in an elastically deformed state on the counterbore portion, and one end surface in the axial direction of the cylindrical body is in contact with the disk portion, and the diameter of the circumferential portion A pair or a plurality of pairs of coupling portions for coupling the lid member to both ends in the direction are formed,
The pair or the plurality of pairs of coupling portions are formed on the other end surface in the axial direction of the cylindrical body, the pair or the plurality of pairs of concave portions into which the pair or the plurality of vertical plate portions are fitted, and the concave portions. A pair or a plurality of pairs of fitting surfaces into which a pair or a plurality of pairs of horizontal plate portions are fitted,
The dimension between the bottom surfaces of the pair or plural pairs of recesses is smaller than the dimension between the opposing surfaces of the pair or plural pairs of vertical plate parts,
The distance between the one or more pairs of fitting surfaces and the one end surface in the axial direction of the cylindrical body is equal to or greater than the distance between the opposing surfaces of the disk portion and the one or more pairs of horizontal plates,
The lid member and the plug member are hindered from relative movement in the axial direction of the disc portion due to the fitting of the horizontal plate portion and the fitting surface, and the vertical plate portion and the concave portion. A linear motion guide cap that is coupled in a state in which relative movement in the radial direction of the disk portion is allowed by fitting.

The lid member includes a disc portion disposed in the counterbore portion with a predetermined gap, a pair of vertical plate portions extending in the axial direction from both ends in the diameter direction of the disc portion, and the pair of vertical plates A pair of horizontal plate portions extending from the tip of the portion to the radial center side of the disk portion,
The plug member is formed of a cylindrical body having a circumferential portion disposed in an elastically deformed state on the counterbore portion, and one end surface in the axial direction of the cylindrical body is in contact with the disk portion, and the diameter of the circumferential portion A pair of coupling portions that couple the lid member to both ends in the direction are formed,
The fitting surface is a stepped surface formed on the other end surface in the axial direction of the cylindrical body continuously from the recess, and the other end surface in the axial direction of the cylindrical body and the lower surface of the horizontal plate portion coincide with each other. 3. A linear motion guide cap according to 3.