1326747 九、發明說明： 【發明所屬之技術領域】 本發明係為一種線性滑軌，尤指線性滑執之軌條所嗖 之螺栓孔的螺栓孔蓋。 、a 【先前技術】 傳統的線性滑執為了鎖固在機台上，滑執必需製作 若干等間距的螺栓孔，經由螺絲穿設該螺栓孔將其鎖固 在機台上，該螺栓孔必須製作成階梯狀沉頭孔供螺絲頭 在鎖固之後可以沉入滑執的上表面以避免影響滑塊的 運動，當滑軌鎖固完畢之後螺絲頭與滑軌上表面之間會 形成-個凹槽’如此—來粉塵或異物有可能會掉入該凹 槽，進而掉進滑塊内部而影響滑塊的正常運作，為了避 免此If形的發生’傳統的作法會利用螺栓孔蓋蓋設於該 螺栓孔，然較為常見的習知技術如以下幾種： 第一種螺栓孔蓋如台灣專利公告第525724號專利 案，請參閱該㈣-所示，該螺拾孔蓋4成—圓盤狀， 中間設有一氣孔4 1以传ig γ 2丨# ^ 4 i Μ便螺栓孔盍4敲入螺栓孔時空 氣可順著氣孔排出，且該螺於3丨葚认从 茨辞' 松孔盍於外周設有一圓環部 4 2，該圓環部4 2外徑# μ古 ^ ΙΜ工係δ又有一略呈錐度狀之導入部 5 以利敲入螺栓孔中。 第二種螺栓孔蓋如曰本專利特開第2007_192282號 專利案，請參閱該案圖四所示，該螺拴孔蓋7具有一天 板部2 1，該天板部2 1向下延伸有一蓋部2 6及一嵌 D邛2 7，該嵌合部之外徑0 d大於該蓋部之外徑必 D1 ’該蓋部2 6及嵌合部2 7之間具有一凹溝部3 ◦ ’另嵌合部2 7前端具有一導入部28。 以上之習用技術因只藉由螺栓孔蓋之外周與滑軌 之螺栓孔干涉接觸，而該螺栓孔蓋外周並無彈性之設 計使螺栓孔蓋對於螺栓孔的干涉力量是固定的，是以 該螺栓孔蓋如遇到振動或外力擠壓很容易脫離原始位 置而失去螺栓孔蓋之功能，另外該螺拴孔蓋因外周 並無彈性之設計，故與螺栓孔組合時，並無法吸收螺 栓孔因加工誤差所產生的變異。 、 【發明内容】 基於上述習知螺栓孔蓋之問題點，本發明人經過研究 改良後’終有魏達成以下發明之目的之發明誕生。九 即，本發明首要目的在於，設計一種藉由兩種不同彈 1326747 性係數之材料（或外型）來達到外周具有彈性功能 ?1.芸β 系、检 為達上述之目的，本發明係為一種線性滑軌，係包含: -滑執’為—長條狀’其於兩側各設有滾動溝，且3 滑軌係設有若干螺检孔； =1326747 IX. Description of the Invention: [Technical Field] The present invention is a linear slide rail, especially a bolt hole cover of a bolt hole of a linear sliding rail. a [Previous technology] In order to lock on the machine platform, the traditional linear slipper must make a number of equally spaced bolt holes. The bolt holes are screwed through the bolt holes to lock the machine to the machine table. The stepped countersunk hole is made for the screw head to sink into the upper surface of the sliding plate after locking to avoid affecting the movement of the slider. When the sliding rail is locked, a joint between the screw head and the upper surface of the sliding rail is formed. The groove is so - dust or foreign matter may fall into the groove, and then fall into the inside of the slider to affect the normal operation of the slider. In order to avoid the occurrence of this If shape, the traditional method will use the bolt hole cover to cover In the bolt hole, the more common conventional techniques are as follows: The first type of bolt hole cover, such as the Taiwan Patent Publication No. 525724 patent, please refer to the (4)-, the screw-pick hole cover 4 is formed into a circle. Disc-shaped, with a vent 4 1 in the middle to transmit ig γ 2丨# ^ 4 i Μ 螺栓 bolt hole 盍 4 when the bolt hole is knocked into the hole, the air can be discharged along the vent, and the snail recognizes the snail The hole is provided with a circular portion 4 2 on the outer circumference, and the annular portion 4 2 outer diameter# Old ^ ΙΜ Engineering Department δ another of a slightly tapered shape to facilitate introduction portion 5 knock the bolt holes. The second type of bolt hole cover is as described in the patent application No. 2007_192282, as shown in FIG. 4 of the present invention. The screw hole cover 7 has a one-day plate portion 2 1, and the sky plate portion 2 1 extends downward. The cover portion 26 and an insert D 邛 2 7, the outer diameter 0 d of the fitting portion is larger than the outer diameter of the cover portion D1 'the groove portion 3 6 and the fitting portion 27 have a groove portion 3 ◦ The other end portion of the fitting portion 2 has an introduction portion 28. The above-mentioned conventional technique is because the outer circumference of the bolt hole cover is not in contact with the bolt hole of the slide rail, and the outer circumference of the bolt hole cover is not elastic, so that the interference force of the bolt hole cover to the bolt hole is fixed. If the bolt hole cover is pressed by vibration or external force, it is easy to get out of the original position and lose the function of the bolt hole cover. In addition, the screw hole cover has no elastic design due to the outer circumference, so the bolt hole cannot be absorbed when combined with the bolt hole. Variation due to machining errors. According to the above-mentioned problem of the conventional bolt hole cover, the inventors of the present invention have been researched and improved, and the invention of the purpose of the following invention was born. Nine, the primary object of the present invention is to design a material (or shape) of two different elastic 1326747 coefficient to achieve the peripheral elastic function. 1. 芸β system, the test for the above purpose, the present invention The utility model relates to a linear slide rail, which comprises: - a sliding handle is - a long strip shape, which is provided with rolling grooves on both sides, and 3 sliding rails are provided with a plurality of screw inspection holes;
一滑塊’係跨設於該滑軌上， 動溝之滾動槽； 其内側係设有相對該滾 若干滾動件，係設於該滾動溝及滾動槽之間； 兩循環件，係設於該滑塊之㈣面，其上設有迴产 槽，該迴流槽係提供滾動件迴流，使滾動件能無限循環二 一螺栓，係穿設於該螺拴孔中； 右干螺栓孔蓋，其主要由一本體及一彈性部所構成， 該本體係由-蓋板及-定位部所構成，該定位部係設置於 該蓋板下方，該彈性部縣設於蚊位部上，且該彈性部 之彈性係數係小於該本體之彈性係數【註：依據虎克定律 F = kx (符號說明·· F為外力；k為彈性係數；χ為變形 ^因此在相同外力（F)下，彈性係數（10越小，則變形 量（X)越大；故為使該彈性部容易變形以和該螺栓孔配 合，故設計使彈性部的彈性储小於該本體的彈性係數， 以使彈性部的變形量大於該本體之變形量】，該彈性部未 袭設於該螺、检孔時之外徑係大於該螺栓孔之内徑；該蓋板 7 1326747 係設有-穿孔，該定位部於外周係設有一導引部及—凹 槽且該疋位部垂直於該蓋板之方向係設有複數個切槽， 使该疋位部具有彈性； 該彈丨生。|5，係裝設於該定位部之凹槽，該彈性部之彈 性係數係小於該本體之彈性係數；該彈性部之材質 膠、石夕膠、熱塑性彈性體、或較軟之金屬材質（例如：鋼 或紹）作為該彈性部之材料，使該彈性部之彈性係數小於 忒本體之彈性係數；而該彈性部除了藉由材料的特性使本 身之彈性佩小於該本體之彈性健，亦可藉由外型的改 變W性部之彈性係數小於該本體之彈性係數【註:如 氏模數（Ybung,sm〇du|us)較高的材料作為彈性體 、材質’就需藉由外型的改變來提高彈性體的變形量，例 吏用外31為C子型的c型扣做為彈性體，該c型扣因具 =形成兩自由端；故在相同的外力情況下該c型 置因為結構的因素而遠大於該本體（即使本體的 律F “可t較小）之變形量’再以前述條件帶入虎克定 升”、（符就說明· F為外力；k為彈性係數；X為變 性：：式中’可得該C型扣之彈性係數小於該本體之彈 且彈性係數的比值可達3〜10倍】，並使該彈 體產生一徑向力與該螺栓孔產生干涉。 另外該彈性部亦可藉 由雙料射出方式一體成型於該 8 本體上，這樣— 低製造成本。 來可以縮短螺魏蓋的裝配時間 ，並且降 该螺栓孔蓋主要有三個外徑，其一為蓋板之外徑、苴 -為定位部之外徑、其三為彈㈣之外徑，而此三個外徑 與該滑執之螺栓狀為：蓋板之外徑與螺检孔之 内徑相等，而前述兩者係小於定位部之外徑，而該定位部 之外仏係小於彈性部之外徑，換句話說該彈性部之外徑為 t大’再者為該定位部之外徑，最後為織板之外_螺 枝孔之内’故本發明係藉由彈性部與定位部的彈性功 能，能確實與該滑執之螺栓孔干涉固定，以防止螺栓孔蓋 脫離原始位置，而失去防塵功能。 為了更進一部瞭解本發明之特徵及技術内容，請參閱 以下有關本發明之實施方式說明及圖式，然而此實施方式 及圖式僅供說明及參考用，而非用以對本發明做任何限制 者0 【實施方式】 请參閱第一圖、第二圖、第三A圖、第三B圖、第 二C圖、第四A圖、第四B圖、第五圖、第六a圖、第六 1326747 B圖所示，本發明係為一種線性滑軌，係包含： /月軌1，為一長條狀，其於兩側各設有滾動溝1 1，且該滑軌1係設有若干螺栓孔1 2 ; …一滑塊2 ’係跨設於該滑…上，其内側係設有相對 該滾動溝1 1之滾動槽2 1 ; 若干滾動件（未顯示），係設於該滾動溝i丄及滾動 槽2 1之間； 兩循環件3，係設於該滑塊2之兩端面’其上設有迴 ιι>槽3 1，該迴流槽3 1係提供滚動件（未顯示）迴流， 使滚動件（未顯示）能無限循環； 一螺栓5，係穿設於該螺栓孔1 2中，其設有一螺紋 若干螺板孔蓋，主要由一本體4及一彈性部s (該彈 性部S之材質可為橡膠、矽膠、熱塑性彈性體、彈性係數 較該本體4之彈性係數小之金屬材質以上其中之一種）所 構成’該本體4係由一蓋板4工及一定位部4 2所構成， 1326747 該定位部4 2係設置於該蓋板4 1下方，該蓋板4 1係設 有一穿孔4 1 1 ’該穿孔4 1 1係提供該螺栓孔蓋敲入 螺栓孔1 2時氣體可順著該穿孔4 1 1排出，該定位部 42於外周係設有一導引部42 1及一凹槽42 3，該導 51部4 2 1係為一斜面且設置於該友位部4 2之外端 部’該導引部4 2 1係具有引導該螺栓孔蓋進入該滑執1 之螺栓孔1 2之功能，該定位部4 2垂直於該蓋板4 1之 方向係设有複數個切槽4 2 2，該切槽4 2 2使該定位部 4 2區分為若干個體並使其具有彈性； 該彈性部S ’係裝設於該定位部4 2之凹槽4 2 3， 其外型可為圓形或C字型。 該螺栓孔蓋主要有三個外徑，其一為蓋板之外徑D 2、其二為定位部之外徑D 3、其三為彈性部之外徑d 4，而此二個外徑與該滑軌之螺栓孔之内徑D工關係為： 該蓋板之外徑D 2與螺栓孔之内㈣i相等，而前述兩者 係小於定位部之外徑D3，而該定位部之外徑d3係小於 彈性部之外徑D4 ’換句話說該彈性部之外徑D4為最 大，再者為該定位部之外徑D 3，最後為該蓋板之外徑〇 2與螺栓孔之内徑！^ (此兩外徑相等），故本發明係藉 由彈性部S與定位部4 2的彈性功能，能確實與該滑軌1 之螺栓孔1 2干涉固定，以防止螺栓孔蓋脫離原始位置’ 而失去防塵功能。 另請參閱第三C圖所示，該圖為螺栓孔蓋之本體4設 有兩彈性部S，以增加螺栓孔蓋與螺栓孔i 2之間的干涉 置，使螺栓孔蓋更能穩定設置。再者，請參閱第四B圖所 不，該圖係為螺栓孔蓋裝設於螺栓孔i 2中的狀態圖，由 圖可清楚看出，該定位部4 2藉由切槽422的分割使該 定位部4 2具有彈性，當該定位部4 2與螺拾孔丄2配合 時，因受到螺栓孔之内徑：）丄擠壓產生變形，而該彈性部 S也同樣受到擠壓變形，藉由定位部4 2與彈性部3所具 有的彈性功能與螺栓孔丄2配合後產生干涉，使螺栓孔蓋 具有較佳的定位能力。而本發明之螺栓孔蓋亦可只藉由該 彈性部與螺栓孔干涉即可，這樣也可得到不錯的定位能 力。 由所述上得知，本發明已確實該善習知技術之問題 點，為清楚說明茲將本發明之優點條列如下. 1.本發明之定位部4 2與彈性部S都具有彈性，可吸收 螺栓孔12因加工時的所產生的誤差。 1326747 2.本發明藉由定位部4 2與彈性部s雙重干涉，加強螺 栓孔蓋之定位效果。 ” 3·彈性部S具替換性’可因不同環境的防塵需求更換外 徑較大之彈性部s，使螺栓孔蓋與螺栓孔i2的干涉 量增加。 綜所上述，本發明之『具有產業之可利用性』應已毋 庸置疑，除此之外，在本案實施例所揭露出的特徵技術， 於申請之前並未曾見於諸刊物，亦未曾被公開使用，不但 具有如上所述功效增進之事實，更具有不可輕忽的附加功 效’是故’本發明的『新穎性』以及『進步性』都已符合 專利法規1依法提出發明專利之申請，祈請惠予審查並 早曰賜准專利，實感德便。 以上所述實施例之揭示係用以說明本發明，並非用以 限制本發明，故舉凡數值之變化與等效元件之置換，仍應 隸屬本發明之範_。 13 1326747 【圖式簡單說明】 第一圖為本發明之線性滑軌示意圖。 第二圖為本發明滑軌之螺栓孔與螺栓孔蓋配合示意 圖。 第二A圖為本發明螺栓孔蓋上視圖。 第二B圖為第三A圖A — a剖面裝設一彈性部之螺 栓孔蓋示意圖。 第二C圖為第三a圖A — A剖面裝設二彈性部之螺 栓孔蓋示意圖。 第四A圖為本發明滑軌之螺栓孔與螺栓孔蓋配合之 剖視圖。 第四B圖為本發明已將螺栓孔蓋裝設至螺栓孔之剖 視圖。 第五圖為本發明之螺栓孔蓋立體圖。 第六A圖為本發明螺栓孔蓋上視圖。 第六B圖為第六a圖B _ B剖面裝設一彈性部之螺 栓孔蓋示意圖。 ' 1326747 【主要元件符號說明】 1 滑執 1 1 滾動溝 1 2 螺栓孔 2 滑塊 2 1 滚動槽 3 循環件 3 1 迴流槽 4 本體 4 1 蓋板 4 11 穿孔 4 2 定位部 4 2 1 引導部 4 2 2 切槽 4 2 3 凹槽 5 螺栓 S 彈性部 D1 螺栓孔之内徑 D 2 蓋板之外徑 D 3 定位部之外徑 D 4 彈性部之外徑 15a sliding block is disposed on the sliding rail, and a rolling groove is formed on the sliding groove; the inner side is provided with a plurality of rolling elements opposite to the rolling, and is disposed between the rolling groove and the rolling groove; The (four) face of the slider is provided with a returning groove, which provides a rolling element returning, so that the rolling member can infinitely circulate the two-bolt, and is threaded in the screw hole; the right-drying bolt hole cover, The system is mainly composed of a body and an elastic portion. The system is composed of a cover plate and a positioning portion. The positioning portion is disposed under the cover plate, and the elastic portion is disposed on the mosquito seat portion, and the The elastic coefficient of the elastic portion is smaller than the elastic coefficient of the body. [Note: According to Hooke's law F = kx (symbol description · F is external force; k is elastic coefficient; χ is deformation ^ so under the same external force (F), elasticity The smaller the coefficient (10 is, the larger the deformation amount (X) is. Therefore, in order to make the elastic portion easily deform to fit the bolt hole, the elastic storage of the elastic portion is designed to be smaller than the elastic coefficient of the body, so that the elastic portion The amount of deformation is greater than the deformation amount of the body, and the elastic portion is not disposed on the snail The outer diameter of the hole is larger than the inner diameter of the bolt hole; the cover 7 1326747 is provided with a through hole, and the positioning portion is provided with a guiding portion and a groove on the outer circumference, and the clamping portion is perpendicular to the cover The direction of the plate is provided with a plurality of slots, so that the clamp portion has elasticity; the spring is generated. |5, is installed in the groove of the positioning portion, and the elastic coefficient of the elastic portion is smaller than the elasticity of the body Coefficient; the material of the elastic portion, the stone rubber, the thermoplastic elastomer, or the softer metal material (for example, steel or steel) as the material of the elastic portion, so that the elastic coefficient of the elastic portion is smaller than the elastic modulus of the body of the crucible In addition to the elasticity of the body, the elastic portion of the elastic portion is smaller than the elastic elasticity of the body, and the elastic coefficient of the W-shaped portion is smaller than the elastic coefficient of the body by the external shape [Note: Ru's modulus (Ybung, sm〇du|us) The higher material is used as the elastomer and the material. The shape of the elastomer needs to be changed by the change of the shape. For example, the c-type buckle with the outer 31 is a C-type is used as the Elastomer, the c-shaped buckle has two free ends; therefore, the same In this case, the c-type is much larger than the body due to the structural factor (even if the law of the body F is "small"), the amount of deformation is then brought into the Huk Dingsheng by the aforementioned conditions. External force; k is the elastic coefficient; X is the denaturation: in the formula, 'the elastic coefficient of the C-shaped buckle is smaller than the elastic of the body and the ratio of the elastic coefficient can be 3 to 10 times】, and the elastic body is generated to have a diameter The force force interferes with the bolt hole. In addition, the elastic portion can be integrally formed on the 8 body by means of two-shot injection, so that the manufacturing cost is low, and the assembly time of the screw cover can be shortened, and the bolt hole cover can be lowered. There are three outer diameters, one of which is the outer diameter of the cover plate, the outer diameter of the 苴- is the positioning portion, and the third is the outer diameter of the elastic (four), and the three outer diameters and the sliding bolt shape are: The outer diameter of the outer diameter is equal to the inner diameter of the thread detecting hole, and the two are smaller than the outer diameter of the positioning portion, and the outer diameter of the positioning portion is smaller than the outer diameter of the elastic portion, in other words, the outer diameter of the elastic portion is t The big one is the outer diameter of the positioning part, and finally the outside of the weaving board. Therefore, the present invention can be surely interfered with the bolt hole of the sliding by the elastic function of the elastic portion and the positioning portion, so as to prevent the bolt hole cover from being separated from the original position and losing the dustproof function. For a better understanding of the features and technical aspects of the present invention, reference should be made to the description of the embodiments of the invention. [0] Embodiments Please refer to the first diagram, the second diagram, the third A diagram, the third B diagram, the second C diagram, the fourth A diagram, the fourth B diagram, the fifth diagram, and the sixth a diagram. The present invention is a linear slide rail comprising: /month rail 1, which is a long strip, which is provided with rolling grooves 1 1 on both sides, and the slide rail 1 is provided There are a plurality of bolt holes 1 2; a slider 2' is spanned on the sliding ..., and the inner side is provided with a rolling groove 2 1 opposite to the rolling groove 1 1; a plurality of rolling members (not shown) are provided Between the rolling groove i丄 and the rolling groove 2 1 ; the two circulating members 3 are disposed on both end faces of the slider 2 and are provided with an iv 3 groove 1 , and the recirculating groove 3 1 is provided with a rolling member (not shown) reflow, so that the rolling member (not shown) can be infinitely circulated; a bolt 5 is threaded through the bolt hole 12, which is provided with a thread The plate hole cover is mainly composed of a body 4 and an elastic portion s (the material of the elastic portion S may be rubber, silicone, thermoplastic elastomer, or a metal material having a lower modulus of elasticity than the body 4) The main body 4 is composed of a cover 4 and a positioning portion 4 2 , and the positioning portion 42 is disposed under the cover 4 1 , and the cover 4 1 is provided with a through hole 4 1 1 ' The through hole 4 1 1 is provided, and the gas is displaceable along the through hole 41 1 when the bolt hole cover is tapped into the bolt hole 1 2 . The positioning portion 42 is provided with a guiding portion 42 1 and a groove 42 3 on the outer circumference. The guide portion 51 is a sloped surface and is disposed at an outer end portion of the friend portion 4 2 . The guide portion 4 2 1 has a bolt hole 1 2 for guiding the bolt hole cover into the sliding block 1 The positioning portion 42 is perpendicular to the direction of the cover plate 4 1 and is provided with a plurality of slots 4 2 2 which divide the positioning portion 4 2 into a plurality of individuals and make them elastic; The elastic portion S′ is mounted on the groove 4 2 3 of the positioning portion 42 , and the outer shape thereof may be circular or C-shaped. The bolt hole cover has three outer diameters, one of which is the outer diameter D 2 of the cover plate, the other is the outer diameter D 3 of the positioning portion, and the third is the outer diameter d 4 of the elastic portion, and the two outer diameters are The inner diameter D of the bolt hole of the slide rail is: the outer diameter D 2 of the cover is equal to the inner (4) i of the bolt hole, and the two are smaller than the outer diameter D3 of the positioning portion, and the outer diameter of the positioning portion D3 is smaller than the outer diameter D4 of the elastic portion. In other words, the outer diameter D4 of the elastic portion is the largest, and the outer diameter D 3 of the positioning portion is the outer diameter 〇2 of the cover plate and the inside of the bolt hole. path! ^ (The two outer diameters are equal), so the present invention can be surely interfered with the bolt hole 12 of the slide rail 1 by the elastic function of the elastic portion S and the positioning portion 42 to prevent the bolt hole cover from being out of the original position. ' And lose the dust function. Please also refer to the third C figure, which is provided with two elastic portions S for the body 4 of the bolt hole cover to increase the interference between the bolt hole cover and the bolt hole i 2 , so that the bolt hole cover can be more stably set. . Furthermore, please refer to FIG. 4B. This figure is a state diagram in which the bolt hole cover is installed in the bolt hole i 2 . As is clear from the figure, the positioning portion 42 is divided by the slot 422. The positioning portion 42 has elasticity. When the positioning portion 42 is engaged with the screw hole 2, it is deformed by the inner diameter of the bolt hole:), and the elastic portion S is also subjected to compression deformation. The engagement between the positioning portion 42 and the elastic portion 3 and the bolt hole 2 interfere with each other, so that the bolt hole cover has a better positioning capability. However, the bolt hole cover of the present invention can also interfere with the bolt hole only by the elastic portion, so that a good positioning capability can be obtained. It is to be understood that the present invention has been a problem with the prior art, and the advantages of the present invention are as follows for clarity. 1. The positioning portion 42 and the elastic portion S of the present invention are both elastic. The error of the bolt hole 12 due to machining can be absorbed. 1326747 2. The present invention double-interacts with the elastic portion s by the positioning portion 4 2 to enhance the positioning effect of the bolt hole cover. 3. The elastic portion S is replaceable. The elastic portion s having a large outer diameter can be replaced by the dustproof requirement of different environments, and the interference amount between the bolt hole cover and the bolt hole i2 is increased. The availability of the product should be unquestioned. In addition, the feature technology revealed in the examples of this case has not been seen in the publications before the application, nor has it been used publicly, not only has the fact that the above-mentioned effects are enhanced. Moreover, it has an additional effect that cannot be neglected. Therefore, the "novelty" and "progressiveness" of the present invention have been applied in accordance with the Patent Regulations 1 to file an invention patent, and pray for review and early grant of patents. The above description of the embodiments is intended to be illustrative of the present invention and is not intended to limit the invention, and the variations of the numerical values and the substitution of equivalent elements are still subject to the scope of the invention. 13 1326747 BRIEF DESCRIPTION OF THE DRAWINGS The first figure is a schematic diagram of a linear slide rail of the present invention. The second figure is a schematic diagram of the bolt hole and the bolt hole cover of the slide rail of the present invention. The second B is a schematic view of the bolt hole cover of the elastic part of the third A picture A-a. The second C picture is a schematic view of the bolt hole cover of the second elastic part A-A. 4A is a cross-sectional view showing the bolt hole and the bolt hole cover of the slide rail of the present invention. The fourth B is a cross-sectional view of the bolt hole cover of the present invention installed in the bolt hole. The fifth figure is the bolt hole cover of the present invention. Figure 6 is a top view of the bolt hole cover of the present invention. Figure 6B is a schematic view of the bolt hole cover of the elastic portion of the sixth a B _ B section. ' 1326747 [Main component symbol description] 1 Slipper 1 1 Rolling groove 1 2 Bolt hole 2 Slider 2 1 Rolling groove 3 Recirculation part 3 1 Reflow tank 4 Body 4 1 Cover 4 11 Perforation 4 2 Positioning part 4 2 1 Guide part 4 2 2 Notch 4 2 3 Concave Slot 5 Bolt S Elastic part D1 Bolt hole inner diameter D 2 Cover outer diameter D 3 Positioning part outer diameter D 4 Elastic part outer diameter 15