JP2009209964A - Rolling guide device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a rolling guide device allowing easy and sure installation of a side seal member to a moving block, and surely preventing dropout of a side seal when the moving block moves. <P>SOLUTION: In this rolling guide device, the moving block 2 is installed on a track rail 1 via a large number of rolling elements 3, and the side seal member 6 is arranged for sealing a clearance between the moving block 2 and the track rail 1 along a rolling travel surface of the rolling elements. The moving block 2 is composed of a block body 20 and a pair of end plates 4, and a pair of substantially L-shaped locking leg parts 62 are arranged in the side seal member 6, and the tip of the locking leg parts 62 is bent toward both ends in the longitudinal direction of the side seal member 6, and the end plates 4 are also provided with a locking hole for inserting the locking leg parts 62 of the side seal member 6 in response to a fixation to the block body 20. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention allows a moving block to be reciprocated freely along a track rail, which is assembled to the track rail via rolling elements such as a large number of balls or rollers in which the moving block is infinitely circulated. More particularly, the present invention relates to a rolling guide device provided with a seal member for preventing foreign matter adhering to a track rail from entering a moving block.

  In a work table of a machine tool and a linear guide portion or a curved guide portion of various conveying devices, a rolling guide device in which a moving block on which a movable body such as a table is continuously moved along a track rail is frequently used. In this type of rolling guide device, the moving block is assembled to the track rail via a large number of balls or rollers (hereinafter referred to as “rolling elements”), and the rolling element is interposed between the moving block and the track rail. By rolling while applying a load, the movable body mounted on the moving block can be moved lightly with very little resistance along the track rail. In addition, the moving block is provided with an infinite circulation path of rolling elements, and the moving block can be continuously moved along the track rail by circulating the rolling elements in the infinite circulation path. It has become.

  The moving block is mainly composed of a metal block main body and a pair of synthetic resin end plates coupled to both ends of the block main body. The block body is provided with a load rolling surface opposite to the rolling surface of the rolling element provided on the track rail, and the rolling body is opposed to the rolling surface of the track rail and the load rolling surface of the block body. It is comprised so that it may roll, applying a load in the formed load channel. The block body is also provided with a rolling element return passage in parallel with the load rolling surface. This block body is made of, for example, steel that can be hardened in order to suppress wear over time due to rolling of the rolling elements. On the other hand, the end plate is formed with a direction changing path, and is formed by injection molding of a synthetic resin in order to realize a complicated shape. Then, by accurately fixing the pair of end plates to the front and rear end faces of the block body, the end of the load passage and the end of the rolling element return passage are connected by a direction change path, and the rolling element is infinitely circulated. A moving block with a path is completed.

  In the linear guide device configured as described above, foreign matters such as workpiece shavings and dust may adhere to the track rail depending on the use environment, and these foreign matters travel along the track rail. If it enters the moving block, the rolling surface of the track rail, the loaded rolling surface of the moving block, or the rolling element will be damaged, or their wear will be accelerated, and the moving block in the rolling guide device The accuracy of the movement will be lost early. In addition, if the coolant used to cool the workpiece in the machine tool enters the inside of the moving block via the track rail, the lubricating oil adhering to the surface of the rolling element will be washed away, and again the rolling surface As well as premature wear of rolling elements.

  For this reason, the moving block is generally equipped with a sealing device for preventing foreign matter from entering the moving block. Conventionally, this sealing device includes a pair of end seal members that are respectively attached to the outside of the end cap at both front and rear end faces in the moving direction of the moving block, and a side seal member that is attached to the moving block along the moving direction of the moving block. By combining these end seal members and side seal members, the gap between the track rail and the moving block is sealed, and foreign matter is prevented from entering the moving block.

  Conventionally, various structures have been proposed as a structure for fixing the side seal member to the moving block in consideration of ease of assembly, ease of replacement, and the like. For example, in the rolling guide device disclosed in Japanese Patent Application Laid-Open No. 2007-211821, a slit along the longitudinal direction of the track rail is formed in the moving block, and a part of the side seal member is fitted into the slit. Thus, the side seal member is held by the moving block.

  Further, in the rolling guide device disclosed in Japanese Utility Model Laid-Open No. 6-53821, a pair of brackets are erected on both ends in the longitudinal direction of the side seal member, and the moving block is sandwiched from the outside of the end plate with these brackets, The side seal member is fixed to the moving block.

Further, in the rolling guide device disclosed in Japanese Patent Application Laid-Open No. 2003-322151, a protruding portion is formed for each of the pair of end plates, while the protruding portion of the end plate is inserted in the vicinity of both ends of the side seal member. After the end plate is inserted into the fitting hole of the side seal member, the side seal member is configured to be held by the end plate by sliding the side seal member in the longitudinal direction. ing.
JP2007-211182 Japanese Utility Model Publication No. 6-53821 JP 2003-322151 A

  However, since the side seal member is in pressure contact with the track rail, when the moving block moves along the track rail, a frictional force along the longitudinal direction easily acts on the side seal member. In a structure in which only a part of the side seal member is fitted to the slit of the moving block as disclosed in 2111821, the side seal member may be deformed by the frictional force and fall out of the slit of the moving block. is there.

  Further, when the side seal member is attached to the moving block, it is necessary to manage the contact state of the side seal member with respect to the track rail so that the above-described frictional force is not excessively generated. However, when the side seal member is fixed using end plates fixed to both ends of the moving block, as in Japanese Utility Model Publication No. 6-53821 and Japanese Patent Application Laid-Open No. 2003-322151, the accuracy of attaching the end plate to the block body is high. If it is bad, the contact state of the side seal member with the track rail also deteriorates, the contact of the side seal member with the track rail becomes insufficient, or a large frictional force acts between the side seal member and the track rail, so that the moving block The nimble exercise will be lost.

  The present invention has been made in view of such problems, and an object of the present invention is to enable the side seal member to be easily and reliably attached to the moving block and to move the moving block. An object of the present invention is to provide a rolling guide device that can reliably prevent the side seal from falling off.

  In addition, another object of the present invention is to ensure that the side seal member can be easily mounted on the moving block and to accurately position the side seal member with respect to the track rail so that a sufficient sealing function can be exhibited. It is to provide a simple rolling guide device.

  In order to achieve the above object, a rolling guide apparatus according to the present invention is assembled with a track rail in which a rolling surface of a rolling element is formed along the longitudinal direction, and the rolling rail is assembled to the track rail via a number of rolling elements. A moving block having an infinite circulation path of the rolling element, and a side seal member attached to the moving block and sealing a gap between the moving block and the track rail along a rolling surface of the rolling element. The moving block includes a block main body on which a load rolling surface of a rolling element facing the rolling surface of the track rail is formed, and the endless circulation fixed to the front and rear end surfaces in the moving direction of the block main body. It is comprised from a pair of end plate which comprises a part of path | route. The side seal member is provided with a pair of substantially L-shaped locking legs, the ends of the locking legs are bent toward both ends in the longitudinal direction of the side seal member, and the end plate Is provided with a locking hole into which the locking leg portion of the side seal member is inserted in accordance with the fixing to the block body, and the seal member is attached to the moving block in a state where a pair of end plates are fixed to the block body. On the other hand, it is kept inseparable.

  According to such technical means, when the moving block is configured by attaching the pair of end plates to the front and rear end surfaces in the moving direction of the block main body, the locking leg of the side seal member is inserted into the locking hole of the end plate. When the portion is inserted, these end plates hold the locking leg portion from both ends in the longitudinal direction of the side seal member, whereby the side seal member is held against the moving block. According to such a holding structure, unless the end plate is removed from the block body, the locking leg portion does not come out of the locking hole of the end plate, and the side seal member is firmly held against the moving block. It becomes possible. Further, since the work of fixing the end plate to the block body and the work of attaching the side seal member to the moving block are performed at the same time, the work of attaching the side seal member does not become troublesome.

  Furthermore, in the present invention, from the viewpoint of accurately positioning the side seal member with respect to the track rail, the side seal member is in contact with the block body at a position facing the seal surface of the track rail. Is preferred. In the present invention, since the locking leg portion of the side seal member is inserted into the locking hole of the end plate, the side seal member is held against the moving block. Then, the side seal member cannot be accurately positioned with respect to the track rail. However, the block body to which the end plate is fixed is assembled to the track rail via the rolling elements, and due to the nature of the rolling guide device used for the linear guides of various precision equipment, The positioning accuracy is sufficiently high. Therefore, when the side seal member is attached to the moving block, the side seal member itself is held by a pair of end plates, but the side seal member itself is brought into contact with the block body at a position facing the seal surface of the track rail. It becomes possible to accurately position the seal member with respect to the track rail. Thereby, even if it is a case where the attachment precision with respect to the block main body of an end plate is not fully securable, the sealing function of a side seal member can fully be exhibited.

  Furthermore, the side seal part may be entirely made of synthetic resin, but from the viewpoint of improving the straightness of the side seal member and making the contact pressure to the track rail uniform, the side seal member Is preferably composed of a metal base plate including the locking legs, and a rubber seal lip fixed to the long side of the base plate and pressed against the seal surface of the track rail. In this way, if the rubber seal lip that contacts the track rail is held by the metal base plate, the straightness of the seal lip increases, and the contact pressure between the seal lip and the seal surface of the track rail is uniform. The side seal member can be prevented from being deformed against the frictional force between the seal lip and the track rail, and the side seal member can be held more firmly against the moving block. . Further, by bringing the base plate into contact with the block main body at the position facing the seal surface of the track rail as described above, the sealing function of the side seal member can be further enhanced.

  Hereinafter, the rolling guide device of the present invention will be described in detail with reference to the accompanying drawings.

  1 and 2 show an example of a rolling guide device to which the present invention is applied. FIG. 1 is a front view and FIG. 2 is an exploded perspective view. This rolling guide device is composed of a track rail 1 that extends linearly and is fixed to a base portion such as a bed or a column, and a moving block 2 that is assembled to the track rail 1 via a number of rollers 3. A movable body such as a table fixed to the moving block 2 can be freely moved along the track rail 1. In FIG. 1, a part of the roller 3 is visible in the gap between the track rail 1 and the moving block 2, but the roller is not drawn in the exploded perspective view of FIG. 2.

  The track rail 1 has a substantially rectangular cross section perpendicular to the longitudinal direction, and substantially V-shaped track grooves are formed on both side surfaces, and an upward inclined surface 10a and a downward direction that form the track grooves. The inclined surface 10 b is a rolling surface of the roller 3. The track rail 1 is fixed to the base portion by fixing bolts, and the track rail 1 has a plurality of through holes 11 through which the fixing bolts are inserted at predetermined intervals in the longitudinal direction. It is provided in a row.

  On the other hand, the moving block 2 includes a block main body 20, a pair of synthetic resin end plates 4 fixed to both front and rear end faces in the moving direction of the block main body 20, and the end plate 4 outside the end plate 4. It is comprised from the end seal member 5 which seals the clearance gap between the track rails 1. Note that the front view of FIG. 1 depicts a state in which the end seal member 5 is removed.

  The block main body 20 has a horizontal web 20a corresponding to the upper surface of the track rail 1, and a pair of skirt portions 20b depending from both ends of the horizontal web 20a, and is formed in a channel shape as a whole. . The upper structure of the track rail 1 including the track groove is loosely fitted into the groove surrounded by the lateral web 20a and the pair of skirt portions 20b and 20b.

  The block body 20 is formed with a substantially V-shaped protrusion 21 corresponding to the track groove on the side surface of the track rail 1 on the inner surface of each skirt portion 20b. The protrusion 21 has a downward inclined surface 21a and an upward inclined surface. On the surface 21b, a load rolling surface facing the roller rolling surfaces 10a, 10b of the track rail 1 is formed. The roller 3 rolls between the roller rolling surfaces 10a and 10b on the track rail 1 side and the load rolling surfaces 21a and 21b on the block body side while applying a load acting on the block body 20. That is, a roller 3 load path is formed by the roller rolling surfaces 10a and 10b on the track rail 1 side and the load rolling surfaces 21a and 21b on the block body side.

  A plurality of roller return passages are formed in each skirt portion 20b of the block main body 20 so as to form a pair with the load rolling surfaces 21a and 21b. The roller 3 that has finished rolling on the load rolling surfaces 21a and 21b is released from the load and then returned to the initial position of the load rolling surfaces 21a and 21b through these roller return passages.

  Further, as shown in FIG. 2, a mounting surface 22 for fixing a movable body such as a table is formed on the upper surface of the horizontal web 20a of the block body, and a plurality of tap holes 23 are formed on the mounting surface 22. Has been. The tip of a fixing bolt that penetrates the movable body is screwed into the tap hole 23 so that the movable body can be fixed to the mounting surface 22 of the block main body 20.

  The block main body 20 is a composite body composed of a metal block and a resin molded portion having the metal block as a core, and the load rolling surfaces 21a and 21b and the mounting surface 22 that require strength are formed on the metal block. On the other hand, a roller return passage that is not so strong is formed in the resin molded portion. The front and rear end surfaces of the block main body 20 to which the end plate 4 is mounted are provided with plate mounting portions 24 made of the resin molding portion, and the end plate 4 is connected to the block main body through the plate mounting portion 24. It is designed to be fixed in position.

  The end plate 4 is formed in a channel shape like the slider body. A substantially U-shaped direction change path on which the roller 3 rolls in an unloaded state is formed on the inner side surface (contact surface with the block main body 20) of the end plate 4 in contact with the block main body 20, and this direction change is performed. One end of the path corresponds to the load rolling area of the block main body 20, and the other end corresponds to the roller return path of the block main body 20. Therefore, each end plate 4 is formed with four direction changing paths corresponding to the load passages of the block body 20. When the pair of end plates 4 are fixed to the front and rear end faces of the block body 20, An endless circulation path of the roller 3 is formed in which the running surfaces 21a, 21b), the direction change path, the roller return path, and the direction change path are continuous.

  The end plate 4 includes a plate body 40, and a pair of first return pieces 41 and a pair of second return pieces 42 that are fitted to the plate body 40 from the back side. On the other hand, by fitting the first return piece 41 and the second return piece 42, the above-described substantially U-shaped direction change path is completed. The infinite circulation path of the roller 3 including the load rolling surface 21a intersects the infinite circulation path of the roller including the load rolling surface 21b in the end plate 4, and the first return piece 41 is connected to the second return piece 42. The direction change path of the roller 3 that is combined and rolls on the load rolling surface 21a, and the direction change of the roller 3 that rolls on the load rolling surface 21b when the second return piece 42 is combined with the plate body 40. Forming a road.

  FIG. 3 is a sectional view taken along line III-III in FIG. A side seal member 6 is attached to the lower end of each skirt portion 20 b of the moving block 2. This side seal member 6 is a rod-shaped member that exists along the longitudinal direction of the track rail 1, seals the gap between the skirt portion 20 b of the moving block 2 and the track rail 1, and cuts the metal scattered in the surrounding environment. Foreign matter such as powder or coolant is prevented from entering the inside of the moving block 2 along the side surface of the track rail 1. Although omitted in FIG. 3, as shown in FIG. 2, end seal members 5 are attached to both front and rear end faces in the moving direction of the moving block 2, and both end faces in the longitudinal direction of the side seal member 6 are The end seal member 5 is configured to be in intimate contact. As a result, the gap between the moving block 2 and the track rail 1 is completely sealed, preventing foreign matter from entering the inside of the moving block 2 from the outside, and grease filled in the moving block 2 or the like This prevents the lubricant from leaking outside.

  4 and 5 are views showing the side seal member 6. The side seal member 6 includes a metal base plate 60 held by the moving block, and a rubber seal lip 61 fixed to the long side of the base plate 60 and in contact with the track rail. The seal lip 61 is vulcanized and bonded to the base plate 60. The seal lip 61 is formed so that its thickness is thinner on the tip side than on the base plate 60 side. The seal lip 61 is configured to be appropriately bent when the track lip 1 comes into contact with the track rail 1, thereby reducing the pressure contact force.

  The base plate 60 is provided with a pair of locking legs 62 having a substantially L shape. These locking leg portions 62 are erected on the side surface opposite to the seal lip portion 61 with respect to the base plate 60, and the erection interval substantially matches the axial length of the block body 20 of the moving block 2. ing. The front ends of these locking leg portions 62 are bent toward both ends in the longitudinal direction of the side seal member 6, and as a result, are substantially L-shaped.

  On the other hand, as shown in FIG. 3, the plate body 40 of the end plate 4 is provided with a locking hole 43 corresponding to the locking leg 62 of the base plate 60, and the locking leg 62 is connected to this engaging leg 62. The side seal member 6 is held by the moving block 2 by being inserted into the stop hole 43.

  6 to 8 show a procedure for mounting the side seal member 6 to the moving block 2. First, as shown in FIG. 6, only one end plate 4 is attached to the block body 2. A plate body 40 of the end plate 4 is provided with a notch 44 communicating with the locking hole 43 at a position facing the track rail 1, and an opening surrounded by the notch 44 and the block body 20 is open. It has a size that can accommodate the locking leg 62 of the side seal member 6.

  Therefore, as shown in FIG. 7, when the locking leg portion 62 of the side seal member 6 is inserted into the notch portion 44, and the side seal member 6 is slid in the arrow A direction along the longitudinal direction from that state. The distal end of the locking leg 62 formed in a substantially L shape is inserted into the locking hole 43 of the plate body 40, and one end in the longitudinal direction of the side seal member 6 is locked to the moving block 2 by the end plate 4. .

  Then, as shown in FIG. 8, the other end plate 4 is mounted on the block main body 20, and at this time, the end of the locking leg 62 of the side seal member 6 is provided on the plate main body 40 of the end plate 4. The side seal member 6 is completely held with respect to the moving block 2 by being inserted into the locking holes 43.

  As shown in FIG. 3, in a state where the pair of end plates 4 are mounted on the block main body 20, each of the pair of locking leg portions 62 provided on the side seal member 6 is inserted into the locking hole 43 of the plate main body 40. In addition, since the side seal member 6 is in a state in which movement in the longitudinal direction is restricted by the pair of plate main bodies 40, the side seal member 6 can be used unless one of the end plates 4 is removed from the block 20 main body. Cannot be removed from the moving block 2. Therefore, the side seal member can be reliably held with respect to the moving block, and it is possible to prevent an accident that the side seal member falls off during the movement of the moving block with respect to the track rail.

  Further, the side seal member 6 held by the moving block 2 in this way has the seal lip 61 in contact with the side surface of the track rail 1, but the base plate 60 of the side seal member 6 is sealed as shown in FIG. The lip 61 contacts the block main body 20 of the moving block 2 at a position facing the side surface of the track rail 1, that is, the seal surface. This is to improve the mounting accuracy of the side seal member 6 to the moving block 2 and to compensate so that the seal lip 61 contacts the track rail 1 surely and uniformly along the longitudinal direction.

  As described above, the side seal member 6 is held by the moving block 2 via the end plate 4. However, the end plate 4 is a resin molded product, and it takes labor and cost to secure processing accuracy. If it is going to secure the attachment accuracy of the end plate 4 with respect to 2, it will take time for an assembly. Therefore, if the side seal member 6 is positioned only by the end plate 4, the side seal member 6 cannot be accurately positioned with respect to the track rail 1. Time and cost are generated.

  However, in the rolling guide device of the present invention, the side seal member 6 is held to the moving block 2 by using the end plate 4, but the side seal member 6 is blocked at a position facing the seal surface of the track rail 1. The side seal member 6 is positioned with respect to the track rail 1 by using the block main body 20 that is in contact with the main body 2 and is positioned on the track rail 1 via the roller 3. 1 can be easily positioned. That is, in the rolling guide device of the present invention, the side seal member 6 can be accurately positioned with respect to the track rail 1 while firmly holding the side seal member 6 with respect to the moving block 2 with a simple structure. Thus, it is possible to effectively prevent foreign matter from entering the inside of the moving block 2.

It is a front view which shows embodiment of the rolling guide apparatus to which this invention is applied. It is a disassembled perspective view of the rolling guide apparatus shown in FIG. It is the III-III sectional view taken on the line of FIG. It is a top view which shows the side seal member which concerns on embodiment. FIG. 5 is a view taken in the direction of arrow V in FIG. 4. It is a perspective view which shows the 1st attachment procedure of the side seal member with respect to a movement block. It is a perspective view which shows the 2nd attachment procedure of the side seal member with respect to a movement block. It is a perspective view which shows the 3rd attachment procedure of the side seal member with respect to a movement block.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Track rail, 2 ... Moving block, 3 ... Roller, 4 ... End plate, 6 ... Side seal member, 20 ... Block main body, 43 ... Locking hole, 60 ... Base plate, 61 ... Seal lip, 62 ... Locking leg Part

Claims (3)

A track rail in which a rolling surface of the rolling element is formed along the longitudinal direction, a moving block that is assembled to the track rail via a large number of rolling elements, and has an infinite circulation path of the rolling element, A side seal member which is attached to the moving block and seals a gap between the moving block and the track rail along the rolling surface of the rolling element;
The moving block includes a block main body on which a rolling rolling surface of a rolling element facing the rolling surface of the track rail is formed, and a part of the endless circulation path fixed to both front and rear end surfaces in the moving direction of the block main body. In the rolling guide device composed of a pair of end plates constituting
The side seal member is provided with a pair of locking legs that are substantially L-shaped, and the ends of the locking legs are bent toward both ends in the longitudinal direction of the side seal member, while the end plate Provided with a locking hole into which the locking leg of the side seal member is inserted along with fixing to the block body,
A rolling guide device, wherein the seal member is held inseparable from the moving block in a state where a pair of end plates are fixed to the block body. The rolling guide device according to claim 1, wherein the side seal member is in contact with the block body at a position facing the seal surface of the track rail. The side seal member is composed of a metal base plate including the locking legs, and a rubber seal lip fixed to the long side of the base plate and pressed against the seal surface of the track rail. The rolling guide device according to claim 2.