Rolling guide devices, opening and closing devices

Abstract

To execute stable guiding operation.SOLUTION: A rolling guiding device 10 is equipped with a raceway member 11 that is formed by an attaching surface portion 12 and a pair of wall portions 13 and 14, and a plurality of first rolling bodies 31 that are disposed so as to freely roll in a space 15 surrounded by the attaching surface portion 12 forming the raceway member 11 and the pair of wall portions 13 and 14. Wall surfaces opposite to each other of the pair of wall portions 13 and 14 are respectively equipped with rolling body rolling surfaces 13a and 14a in contact with a rolling body outer peripheral surface of the first rolling body 31. The rolling body rolling surfaces 13a and 14a formed on the pair of wall portions are formed as circular arc grooves made from a single arc, so that the first rolling body 31 contact with the two rolling body rolling surfaces 13a and 14a at the respective one points. A moving member 21 is equipped with a second rolling body 41 that contacts with an external end portion 14b of the wall portion of any one of the pair of wall portions 13 and 14 configuring the raceway member 11 to perform rolling operation.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a rolling guide device and an opening and closing device using the rolling guide device. [Background technology]

[0002] Conventionally, a rolling guide device has been known which includes a track rail having a generally C-shaped cross section extending in the longitudinal direction, a slider installed so as to be able to reciprocate along the longitudinal direction of the track rail, and a plurality of rolling bodies which are disposed between the track rail and the slider and capable of rolling in the generally C-shaped internal space constituting the track rail, thereby guiding the relative reciprocating movement of the slider with respect to the track rail.

[0003] A specific example of this type of rolling guide device is the linear bearing disclosed in Patent Document 1 below. This linear bearing has two straight rails with a C-shaped cross section arranged parallel to each other, two internal raceways formed in each rail, one above the other, and a slider with three or more rollers that alternately contact the upper and lower internal raceways. The contour of the outer circumferential surface of the roller is formed into an arc shape with a radius r in cross section, one of the upper and lower internal raceways has a V-shaped cross section, and the other internal raceway has an arc shape with a radius R in cross section, and the length of this radius R is longer than the radius r of the roller contour. With this configuration, the linear bearing disclosed in Patent Document 1 below is said to be able to smoothly move the slider even if the rails are deformed by thermal expansion or load, causing the left and right parallelism to be lost. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent No. 3292459 Summary of the Invention [Problem to be solved by the invention]

[0005] However, in the conventional rolling guide device represented by the linear bearing disclosed in the above-mentioned Patent Document 1, there was a problem that the device could not perform an appropriate and stable guiding operation when a Mc moment in the rolling direction acts on a moving member such as a slider. For example, in an opening and closing device in which a track member such as a track rail is installed on a door frame and a door body such as a suspended door is installed on a moving member such as a slider, the suspended door exerts an unbalanced weight on the moving member. When such an unbalanced weight is applied to the moving member, the conventional rolling guide device cannot perform an appropriate and stable guiding operation because its rigidity against the Mc moment in the rolling direction is weak.

[0006] The present invention has been made in consideration of the problems existing in the prior art described above, and its purpose is to provide a rolling guide device that can perform appropriate and stable guiding operation even when an uneven weight is applied to the moving member by improving rigidity against Mc moment in the rolling direction. [Means for solving the problem]

[0007] The rolling guide device according to the present invention is provided with a track member which is an elongated member extending in a longitudinal direction and which is formed by an attachment surface portion which serves as an attachment reference for an external member and a pair of wall portions which are erected from each of both ends of the attachment surface portion toward one side, a moving member which is installed so as to be able to reciprocate along the longitudinal direction of the track member, and a plurality of first rolling bodies which are disposed between the track member and the moving member and which are rollably disposed within a space surrounded by the attachment surface portion and the pair of wall portions which form the track member, thereby guiding the relative reciprocating movement of the moving member with respect to the track member, wherein a rolling body rolling surface which comes into contact with a rolling body outer circumferential surface of the first rolling body is formed on each of the opposing wall surfaces of the pair of wall portions, and the rolling body rolling surface formed on each of the pair of wall portions is formed as a circular arc groove formed of a single arc, so that the first rolling body and the two rolling body rolling surfaces come into contact with each other at one point, and the moving member is disposed on either one of the pair of wall portions which form the track member. Among the parts constituting the movable member, the part facing the movable member is It is characterized by having a second rolling body that makes contact with the outer end and performs a rolling motion.

[0008] The present invention also includes an opening and closing device, characterized in that the track member of the above-mentioned rolling guide device is installed in a door frame, and a door body is installed on the moving member, thereby performing opening and closing operations of the door body relative to the door frame. Effect of the Invention

[0009] According to the present invention, by improving the rigidity against the Mc moment in the rolling direction, it is possible to provide a rolling guide device that can perform appropriate and stable guiding operation even when an uneven weight is applied to the moving member. [Brief description of the drawings]

[0010] [Figure 1] 1 is a perspective view of a rolling guide device according to a first embodiment, as viewed from the front side. [Diagram 2] 1 is a perspective view of a rolling guide device according to a first embodiment, as viewed from the left side. [Diagram 3]FIG. 4 is a schematic diagram for explaining a rolling operation state of a first wheel relative to a first wheel upper rolling surface and a first wheel lower rolling surface in the first embodiment. [Figure 4] 4 is a diagram showing an example of use of the rolling guide device according to the first embodiment when a hanging door is attached to the rolling guide device. FIG. [Diagram 5] 1A to 1C are diagrams showing a modified example of the rolling guide device according to the first embodiment, and a usage example in which a door body used in a railway vehicle is attached to the rolling guide device according to the modified example. [Figure 6] 6 is a diagram showing a configuration example of a railway vehicle in which the rolling guide device shown in FIG. 5 is installed. [Figure 7] FIG. 11 is a left side view of a rolling guide device according to a second embodiment, as viewed from the left side. [Figure 8] FIG. 11 is an external perspective view of a rolling guide device according to a second embodiment, as viewed from diagonally above on the left. [Figure 9] FIG. 11 is a perspective see-through view showing a state in which a moving slider is removed for a rolling guide device according to a second embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] Preferred embodiments for carrying out the present invention will be described below with reference to the drawings. Note that the following embodiments do not limit the inventions according to the claims, and all of the combinations of features described in the embodiments are not necessarily essential to the solution of the invention.

[0012] [First embodiment] First, the basic configuration of the rolling guide device 10 according to the first embodiment will be described with reference to Figs. 1 and 2. Here, Fig. 1 is a perspective view of the rolling guide device according to the first embodiment as seen from the front side, and Fig. 2 is a perspective view of the rolling guide device according to the first embodiment as seen from the left side. In this specification, for convenience of explanation, the directions of the rolling guide device 10 are defined as shown in Figs. 1 and 2. However, these directions do not indicate the directions when the rolling guide device 10 according to the first embodiment is used, and the rolling guide device 10 according to the first embodiment can be used in any position. In other words, the directions of "front, back, up, down, left, right" shown in Figs. 1 and 2 are determined solely for convenience of explanation.

[0013] As shown in Figures 1 and 2, the rolling guide device 10 of the first embodiment is configured to have a track rail 11 as a track member, a moving slider 21 as a moving member installed so as to be able to move back and forth along the longitudinal direction of the track rail 11 (i.e., the left-right direction in Figure 1), a first wheel 31 as a first rolling body arranged in a rollable state between the track rail 11 and the moving slider 21, and a second roller 41 as a second rolling body arranged in a rollable state against the underside of the moving slider 21.

[0014] The track rail 11 is an elongated member having a generally C-shaped cross section extending in the longitudinal direction. As shown in Fig. 2, the track rail 11 of the first embodiment has, in a side view, a mounting surface portion 12 formed to extend in the up-down direction, an upper wall portion 13 as a wall portion according to the present invention formed to extend forward from an upper end of the mounting surface portion 12, and a lower wall portion 14 as a wall portion according to the present invention formed to extend forward from a lower end of the mounting surface portion 12.

[0015] A first wheel upper rolling surface 13a is formed on the lower surface of the upper wall portion 13 as a rolling body rolling surface according to the present invention that contacts the wheel outer peripheral surface of the first wheel 31. Similarly, a first wheel lower rolling surface 14a is formed on the upper surface of the lower wall portion 14 as a rolling body rolling surface according to the present invention that contacts the wheel outer peripheral surface of the first wheel 31. The first wheel upper rolling surface 13a and the first wheel lower rolling surface 14a are disposed opposite each other in a side view. The first wheel 31 is disposed in an internal space 15 (the interior of the space according to the present invention) surrounded by the mounting surface portion 12, the upper wall portion 13, and the lower wall portion 14 in a freely rollable state.

[0016] The track rail 11 of the first embodiment is formed into the above-mentioned outer shape by plastically deforming a metal material by drawing, and forming a flat surface by grinding a portion where a second roller 41 described later comes into contact, i.e., a lower open end 14b (outer end according to the present invention) of the approximately C-shape constituting the track rail 11. However, the method of forming the track rail 11 is not limited to a combination of drawing and grinding. For example, the outer shape may be formed by subjecting a metal material to grinding or cutting, or the outer shape may be formed by subjecting a metal material to plastic deformation by drawing, controlling the surface hardness and internal quality by heat treatment, and then subjecting the metal material to grinding. In other words, the outer shape of the track rail 11, which is a track member of the present invention, can be formed by any processing method.

[0017] Moreover, the track rail 11 in the first embodiment is a member that serves as an attachment reference for the rolling guide device 10. Therefore, in the first embodiment, by forming attachment holes 12a such as bolt holes in the attachment surface portion 12 that constitutes the track rail 11, the track rail 11 can be fixed to an attachment reference surface such as a base or a door frame by using the attachment holes 12a.

[0018] As shown in Fig. 1 and Fig. 2, the moving slider 21 is a block-like member having a roughly rectangular shape, and is installed so as to be movable back and forth along the longitudinal direction of the track rail 11. The moving slider 21 of the first embodiment has three first wheels 31 arranged in a freely rolling state on the rear side, and two second rollers 41 arranged in a freely rolling state on the lower side. In addition, a movable member that is guided and moved by the rolling guide device 10 can be installed on the front side of the moving slider 21.

[0019] The first wheel 31 is a member that is freely rotatably disposed between the track rail 11 and the movable slider 21 in the approximately C-shaped internal space 15 that constitutes the track rail 11, thereby guiding the relative reciprocating movement of the movable slider 21 with respect to the track rail 11.

[0020] More specifically, the first wheels 31 of the first embodiment are arranged in a rollable state on the rear side of the movable slider 21. As is clear from a comparison between Fig. 1 and Fig. 2, the central one of the three first wheels 31 is arranged so as to be in contact with the first wheel upper rolling surface 13a and to have a gap with the first wheel lower rolling surface 14a without contacting the first wheel upper rolling surface 14a. On the other hand, the two first wheels 31 on the left and right of the three first wheels 31 are arranged so as to be in contact with the first wheel lower rolling surface 14a and to have a gap with the first wheel upper rolling surface 13a without contacting the first wheel upper rolling surface 13a. In this way, by arranging the three first wheels 31 so that their positions are staggered in the vertical direction when viewed from the front, for example, when the moving slider 21 moves to the right side of the paper with respect to the track rail 11 in FIG. 1, the first wheel 31 located in the center rotates counterclockwise with respect to the paper in FIG. 1, and the two first wheels 31 located on the left and right rotate clockwise with respect to the paper in FIG. 1. Conversely, when the moving slider 21 moves to the left side of the paper with respect to the track rail 11 in FIG. 1, the first wheel 31 located in the center rotates clockwise with respect to the paper in FIG. 1, and the two first wheels 31 located on the left and right rotate counterclockwise with respect to the paper in FIG. In this way, by arranging the three first wheels 31 so that their positions are staggered in the vertical direction when viewed from the front, the moving slider 21, which performs a relative linear movement along the longitudinal direction of the track rail 11, can perform an appropriate reciprocating linear movement while appropriately receiving a moment load.

[0021] 1 and 2, a configuration example is shown in which one first wheel 31 located in the center is arranged so as to be in contact with the first wheel upper rolling surface 13a, and two first wheels 31 located on the left and right are arranged so as to be in contact with the first wheel lower rolling surface 14a. However, the scope of the present invention is not limited to this, and for example, a configuration opposite to that of the first embodiment, in which one first wheel 31 located in the center is arranged so as to be in contact with the first wheel lower rolling surface 14a, and two first wheels 31 located on the left and right are arranged so as to be in contact with the first wheel upper rolling surface 13a, may be adopted.

[0022] In addition, in the present invention, it is also possible to adopt a configuration example in which four or more first wheels 31 are arranged on the rear side of the moving slider 21, but in this configuration example, it is preferable to arrange the adjacent first wheels 31 so that they alternately contact the first wheel upper rolling surface 13a and the first wheel lower rolling surface 14a.

[0023] Furthermore, the wheel in the present invention includes a wheel member that is attached to a rotating shaft in a freely rotatable state and has a rolling contact surface with a mating member that is formed as a horizontal surface, a convex curved surface, or a concave curved surface. Incidentally, in this embodiment, the rolling contact surface of the first wheel 31 is exemplified as being formed as a convex curved surface (see FIG. 2).

[0024] Here, by adding FIG. 3 to the reference drawings, the relationship between the first wheel 31 and the first wheel upper rolling surface 13a and the first wheel lower rolling surface 14a will be described. FIG. 3 is a schematic diagram for explaining the rolling operation state of the first wheel relative to the first wheel upper rolling surface and the first wheel lower rolling surface in the first embodiment. In FIG. 3, the sub-diagram (a) in the figure shows a state in which the Mc moment in the rolling direction is not applied to the moving slider 21, the sub-diagram (b) shows a state in which the Mc moment in the rolling direction is applied to the moving slider 21, and the sub-diagram (c) is an enlarged view of the dashed line area indicated by the symbol α in the sub-diagram (b).

[0025] In the first embodiment, the cross-sectional shapes of the first wheel upper rolling surface 13a and the first wheel lower rolling surface 14a are formed as circular arc grooves consisting of a single arc. That is, the curvature radius of the first wheel upper rolling surface 13a and the first wheel lower rolling surface 14a is formed slightly larger than the curvature radius of the rolling surface of the first wheel 31. Therefore, the first wheel 31 according to the first embodiment comes into contact with each of the first wheel upper rolling surface 13a and the first wheel lower rolling surface 14a at one point.

[0026] 3A, when no Mc moment is applied to the moving slider 21 in the rolling direction, the line L indicating the rolling direction perpendicular to the rotation center line of the first wheel 31 is 1 is a line arranged vertically in the up-down direction, and the contact points P of the first wheel 31 and the first wheel upper rolling surface 13a and the first wheel lower rolling surface 14a are 1 is located at the center of the groove bottom of the circular arc groove that constitutes the first wheel upper rolling surface 13a and the first wheel lower rolling surface 14a.

[0027] When an Mc moment in the rolling direction is applied to the moving slider 21 from the state shown in the partial view (a) of FIG. 3, the first wheel 31 tilts in the direction in which the Mc moment is applied (clockwise direction on the paper in FIG. 3(b)), as shown in the partial view (b) of FIG. 3. In other words, the line L indicating the rolling direction perpendicular to the rotation center line of the first wheel 31 is inclined in the direction in which the Mc moment is applied (clockwise direction on the paper in FIG. 3(b)). 1 is the line L 2 At this time, since the cross-sectional shape of the first wheel upper rolling surface 13a and the first wheel lower rolling surface 14a is formed as a circular arc groove consisting of a single arc, the contact point moves to the contact point P 1 From the position of the contact point P 2In other words, in the rolling guide device 10 according to the first embodiment, even if an Mc moment in the rolling direction is applied to the moving slider 21, the contact point is shifted according to the Mc moment, and the first wheel 31 and the first wheel upper rolling surface 13a and the first wheel lower rolling surface 14a are always in one-point contact, so that the differential slip amount is small and good rolling motion is always realized.

[0028] 2, in the rolling guide device 10 according to the first embodiment, the above-mentioned first wheel 31 is configured so that the rotation center line 31a is a horizontal line along the front-rear direction. On the other hand, the second roller 41 arranged on the lower surface side of the moving slider 21 is configured so that the rotation center line 41a is a vertical line along the up-down direction. In other words, the second roller 41 according to the first embodiment is configured so that it has a rotation center axis 41a in a direction substantially perpendicular to the rotation center axis 31a of the first wheel 31.

[0029] Furthermore, the second roller 41 is configured to perform a rolling operation by contacting the lower open end 14b of the substantially C-shaped portion constituting the track rail 11. As described above, in the first embodiment, the first wheel upper rolling surface 13a and the first wheel lower rolling surface 14a that contact the first wheel 31 are configured as circular arc grooves, so that the contact point P 1 ,P 2 However, in the first embodiment, the second roller 41 is configured to roll in contact with the lower open end 14b of the substantially C-shaped portion of the track rail 11, so that the contact point P 1 ,P 2The transfer of the Mc moment in the rolling direction is appropriately compensated for, and the first wheel 31 and the second roller 41 can cooperate to receive the Mc moment in the rolling direction. That is, in the first embodiment, by combining two sets of configurations, namely, the configuration of the first wheel 31, the first wheel upper rolling surface 13a and the first wheel lower rolling surface 14a, and the configuration of the second roller 41 and the substantially C-shaped lower open end portion 14b constituting the track rail 11, it is possible to improve the rigidity against the Mc moment in the rolling direction, and it is possible to provide a rolling guide device 10 that can perform an appropriate and stable guiding operation even when an uneven weight is applied to the moving slider 21.

[0030] In the first embodiment, the first wheel upper rolling surface 13a and the first wheel lower rolling surface 14a that come into contact with the first wheel 31 are configured as circular arc grooves, so the advantage of absorbing mounting errors is manifested as displacement depending on the mounting partner. Therefore, particularly in the first embodiment in which the circular arc grooves are adopted for the first wheel upper rolling surface 13a and the first wheel lower rolling surface 14a that come into contact with the first wheel 31, it can be said that it is more preferable to have the second roller 41 that can suitably receive the Mc moment in the rolling direction.

[0031] In the first embodiment, it is assumed that the open end 14b of the track rail 11 that comes into contact with the second roller 41 is formed into a flat surface by drawing a metal material and then grinding it. However, the open end 14b where the second roller 41 rolls can be left in the drawn state without being ground.

[0032] 1 and 2, in the first embodiment, the second roller 41 is disposed so as not to protrude from the outer periphery of the moving slider 21, so the rolling guide device 10 according to the first embodiment has a very compact configuration as a whole. Since such a configuration exerts the effect of minimizing the installation space, the rolling guide device 10 according to the first embodiment has the advantage of a wide range of applicability.

[0033] In the rolling guide device 10 according to the first embodiment, it is preferable to configure the rotational axis of the first wheel 31 and the second roller 41 as an eccentric axis so that the position of the first wheel 31 and the second roller 41 can be adjusted by rotating the eccentric axis. For example, as shown in FIG. 1, in the first embodiment, three first wheels 31 are arranged side by side in the left-right direction, but the rotational axis of two first wheels 31 arranged on the left and right sides is fixed axis, and the rotational axis of one first wheel 31 arranged in the center is eccentric axis, so that the position of the first wheel 31 arranged in the center can be moved upward to adjust the preload of the three first wheels 31 relative to the track rail 11. In addition, if the rotational axis of the second roller 41 is an eccentric axis and the eccentric axis is rotated to an arbitrary position to adjust the position of the second roller 41 in the front-rear direction, the preload of the second roller 41 relative to the track rail 11 can be adjusted.

[0034] The rolling guide device 10 according to the first embodiment has been described above. This rolling guide device 10 is preferably used, for example, as an opening and closing device for a hanging door used in a house or an opening and closing device for a door body used in a railway vehicle. Next, an industrial application example of the rolling guide device 10 according to the first embodiment will be described with reference to Figs. 4 to 6. Here, Fig. 4 is a diagram showing an example of use in the case where a hanging door is attached to the rolling guide device according to the first embodiment. Fig. 5 is a diagram showing an example of a modified form of the rolling guide device according to the first embodiment and an example of use in the case where a door body used in a railway vehicle is attached to the rolling guide device according to the modified form. Furthermore, Fig. 6 is a diagram showing an example of the configuration of a railway vehicle in which the rolling guide device shown in Fig. 5 is installed.

[0035] As shown in Fig. 4, in the rolling guide device 10 according to the first embodiment, the track rail 11 is fixedly installed to the door frame 51, and a hanging door 52 is installed on the moving slider 21, thereby configuring an opening and closing device 100 for a hanging door 52 used in a house. In the case of a hanging door 52, an uneven weight is applied to the moving slider 21, but in the rolling guide device 10 according to the first embodiment, the first wheel 31 and the second roller 41 work together to receive the Mc moment in the rolling direction, so that an appropriate and stable guiding operation of the hanging door 52 can be realized.

[0036] As shown in Fig. 5, the rolling guide device 10 according to the first embodiment can increase the number of first wheels 31, install a large moving slider 21 on one track rail 11, or install multiple moving sliders 21. For example, in the case of the modified embodiment shown in Fig. 5, eight first wheels 31 are installed, and a long moving slider 21 is installed on one track rail 11. A total of eight first wheels 31 are arranged at positions separated on the left and right sides of the long moving slider 21, four on each side. Furthermore, one door body 53 for a railway car is installed using the long moving slider 21.

[0037] The rolling guide device 10 of the modified embodiment shown in Fig. 5 can be used as an opening / closing device 200 for opening and closing the entrance / exit of a railway vehicle as shown in Fig. 6. In this opening / closing device 200, the track rail 11 of the rolling guide device 10 according to the modified embodiment is installed in a door frame 55 (corresponding to the body of a railway vehicle) and a door body 53 is installed on the moving slider 21, so that the door body 53 can be opened and closed relative to the door frame 55 (corresponding to the body of a railway vehicle). In particular, when the rolling guide device 10 is used for a railway vehicle, the rolling guide device 10 has a very compact configuration so that the second roller 41 does not protrude from the outer periphery of the moving slider 21, so that the size of the door body 53 can be made to have a wide range.

[0038] The configuration of the rolling guide device 10 according to the first embodiment and its modified embodiment have been described above. Next, another embodiment of the rolling guide device according to the present invention will be described with reference to Figs. 7 to 9.

[0039] [Second embodiment] FIG. 7 is a left side view of the rolling guide device according to the second embodiment as viewed from the left side. FIG. 8 is an external perspective view of the rolling guide device according to the second embodiment as viewed from diagonally above the left. In the sub-view (a) in FIG. 8, a state in which the moving slider has moved to the left relative to the track rail is shown, and in the sub-view (b) in FIG. 8, a state in which the moving slider has moved to the right relative to the track rail is shown. Furthermore, FIG. 9 is a perspective see-through view showing a state in which the moving slider has been removed from the rolling guide device according to the second embodiment. In FIG. 7 to FIG. 9, the same reference numerals are used for members that are the same as or similar to those of the first embodiment described using FIG. 1 to FIG. 3, and description thereof will be omitted.

[0040] As shown in FIG. 7, the rolling guide device 60 according to the second embodiment is configured to include a track rail 11 as a track member, a moving slider 21 as a moving member installed so as to be movable back and forth along the longitudinal direction of the track rail 11 (i.e., the direction perpendicular to the paper surface in FIG. 7), a number of first balls 61 as first rolling bodies arranged in a rollable state between the track rail 11 and the moving slider 21, and a second roller 41 as a second rolling body arranged in a rollable state against the underside of the moving slider 21.

[0041] The track rail 11 is a long member extending in the longitudinal direction and having a cross section in a generally inverted U-shape. As shown in Fig. 7, the track rail 11 of the second embodiment has, in a side view, a mounting surface portion 12 formed to extend in the vertical direction, an upper wall portion 63 as a wall portion according to the present invention formed to extend forward from an upper end of the mounting surface portion 12, and a lower wall portion 64 as a wall portion according to the present invention formed to extend forward from a lower end of the mounting surface portion 12.

[0042] A first ball upper rolling surface 63a is formed on the lower surface side of the upper wall portion 63 as a rolling element rolling surface according to the present invention which comes into contact with the outer circumferential surface of the first ball 61. Similarly, a first ball lower rolling surface 64a is formed on the upper surface side of the lower wall portion 64 as a rolling element rolling surface according to the present invention which comes into contact with the outer circumferential surface of the first ball 61. The first ball upper rolling surface 63a and the first ball lower rolling surface 64a are disposed opposite each other in a side view.

[0043] Moreover, the track rail 11 of the second embodiment is a member that serves as an attachment reference for the rolling guide device 60. Therefore, in the second embodiment, by forming attachment holes 12a such as bolt holes in the attachment surface portion 12 that constitutes the track rail 11, the track rail 11 can be fixed to an attachment reference surface such as a base or a door frame by using the attachment holes 12a.

[0044] Furthermore, in the track rail 11 of the second embodiment, a metal material is plastically deformed by drawing, and a portion where a second roller 41 described later comes into contact, i.e., a lower open end 64b (outer end according to the present invention) of the substantially C-shape constituting the track rail 11, is formed as a flat surface by grinding. However, the open end 64b where the second roller 41 rolls can be left in the drawn state without being ground.

[0045] As shown in FIG. 7, the moving slider 21 according to the second embodiment is configured by combining two members, a slider block 65 and a mounting block 66.

[0046] 7 and 9, the slider block 65 is an elongated member arranged along the longitudinal direction of the track rail 11, and has ball rolling grooves 65a, 65b formed on the upper and lower surfaces thereof, respectively, facing the first ball upper rolling surface 63a and the first ball lower rolling surface 64a. A large number of first balls 61 are arranged in a freely rolling state on two loaded ball rolling paths extending in the left-right direction, namely, a loaded ball rolling path formed by the first ball upper rolling surface 63a and the ball rolling groove 65a, and a loaded ball rolling path formed by the first ball lower rolling surface 64a and the ball rolling groove 65b, thereby enabling the slider block 65 (moving slider 21) to move back and forth relative to one another along the longitudinal direction of the track rail 11.

[0047] 7 and 8, four second rollers 41 are arranged in a freely rolling state on the underside of the mounting block 66. In addition, a movable member that is guided and moved by the rolling guide device 60 can be installed on the front side of the mounting block 66.

[0048] From the above, the slider block 65 is disposed in the internal space 15 surrounded by the mounting surface portion 12, the upper wall portion 63, and the lower wall portion 64, and further, a large number of first balls 61 are disposed in a freely rolling state inside the loaded ball rolling path constituted by the first ball upper rolling surface 63a and the ball rolling groove 65a, and the loaded ball rolling path constituted by the first ball lower rolling surface 64a and the ball rolling groove 65b. Therefore, the rolling action of the large number of first balls 61 realizes the relative reciprocating movement of the moving slider 21 with respect to the track rail 11.

[0049] As shown in FIG. 7, the numerous first balls 61 are aligned by a retainer 67 made of resin or metal, and are capable of rolling in an aligned state on the two loaded ball rolling paths.

[0050] 7, in the rolling guide device 60 according to the second embodiment, the first ball 61 described above is configured so that the rotation center line 61a is a horizontal line along the front-rear direction. On the other hand, the second roller 41 arranged on the lower surface side of the moving slider 21 is configured so that the rotation center line 41a is a vertical line along the up-down direction. In other words, the second roller 41 according to the second embodiment is configured so that it has a rotation center axis 41a in a direction substantially perpendicular to the rotation center axis 61a of the first ball 61.

[0051] Furthermore, the second roller 41 is configured to perform a rolling operation by contacting the lower open end 64b of the substantially inverted U-shape constituting the track rail 11. In this way, in the second embodiment, the second roller 41 is configured to perform a rolling operation by contacting the lower open end 64b of the substantially inverted U-shape constituting the track rail 11, so that even when a Mc moment in the rolling direction is applied to the moving slider 21, the second roller 41 can appropriately receive the Mc moment. In other words, in the second embodiment, it is possible to provide a rolling guide device 60 that can improve rigidity against the Mc moment in the rolling direction and perform an appropriate and stable guiding operation even when an uneven weight is applied to the moving slider 21.

[0052] In the second embodiment, as shown in Fig. 8, the second roller 41 is disposed so as not to protrude from the outer periphery of the moving slider 21, so the rolling guide device 60 according to the second embodiment has a very compact configuration as a whole. Since such a configuration exerts the effect of minimizing the installation space, the rolling guide device 60 according to the second embodiment has the advantage of a wide range of applicability.

[0053] Although the preferred embodiments of the present invention have been described above, the technical scope of the present invention is not limited to the scope described in the above embodiments. Various modifications and improvements can be made to the above embodiments.

[0054] For example, in the above-mentioned first embodiment, the first wheel 31 as the first rolling body and the second roller 41 as the second rolling body are configured as wheels and rollers. However, for the first rolling body and the second rolling body of the present invention, cam followers or roller followers can be adopted instead of the above-mentioned wheels and rollers.

[0055] Also, for example, in the above-mentioned second embodiment, a case has been described in which the first rolling body is the first ball 61 and the second rolling body is the second roller 41. However, for the first rolling body and the second rolling body of the present invention, any of wheels, rollers, cam followers, and roller followers may be used, and any combination of these may be used.

[0056] For example, in the first embodiment described above, the rolling guide device 10 is used as an opening and closing device 100 for a hanging door used in a house and an opening and closing device 200 for a door body used in a railway vehicle, but the rolling guide device 60 of the second embodiment can also be used for these opening and closing devices 100, 200.

[0057] Also, for example, in the above-described first and second embodiments, the second roller 41 is configured to roll by contacting the lower open end 14b, 64b of the approximate C-shape or the approximate inverted U-shape constituting the track rail 11. However, the second roller 41, which is the second rolling element of the present invention, may be configured to contact the upper open end of the approximate C-shape or the approximate inverted U-shape constituting the track rail 11.

[0058] For example, in the above-mentioned first and second embodiments, the second rolling element of the present invention is a roller (second roller 41), but the second rolling element of the present invention may be a ball. The ball used as the second rolling element of the present invention may be one ball, a plurality of consecutive balls, or a plurality of circulating balls.

[0059] It will be apparent from the description of the claims that such modified or improved forms may also be included within the technical scope of the present invention. [Explanation of symbols]

[0060] 10 (pertaining to the first embodiment and its modified form examples) rolling guide device, 11 track rail (track member), 12 mounting surface portion, 12a mounting hole, 13 upper wall portion (wall portion), 13a first wheel upper rolling surface (rolling body rolling surface), 14 lower wall portion (wall portion), 14a first wheel lower rolling surface (rolling body rolling surface), 14b lower open end portion (outer end portion), 15 internal space (inside of space), 21 moving slider (moving member), 31 first wheel (first rolling body), 31a rotation center line, 41 second roller (second rolling body), 41a rotation center line, 51 door frame (door frame), 52 hanging door (door body), 53 door body, 55 door frame, 60 (pertaining to the second embodiment), 61 first ball (first rolling body), 61a Rotation center line, 63 upper wall portion (wall portion), 63a first ball upper rolling surface (rolling body rolling surface), 64 lower wall portion (wall portion), 64a first ball lower rolling surface (rolling body rolling surface), 64b lower open end portion (outer end portion), 65 slider block, 65a, 65b ball rolling groove, 66 mounting block, 67 retainer, P 1 ,P 2 Contact, L 1 ,L 2 (Indicating rolling direction) Line, 100,200 Switchgear.

Claims

1. a track member which is an elongated member extending in a longitudinal direction and which is formed by a mounting surface portion which serves as a mounting reference for an external member, and a pair of wall portions which are erected in one direction from each of both ends of the mounting surface portion; a moving member that is reciprocally movable along a longitudinal direction of the track member; a plurality of first rolling bodies that are disposed between the track member and the movable member and rollably within a space surrounded by the mounting surface portion and the pair of wall portions that form the track member, thereby guiding a relative reciprocating movement of the movable member with respect to the track member; In a rolling guide device comprising: A rolling element rolling surface that comes into contact with an outer circumferential surface of the first rolling element is formed on each of the opposing wall surfaces of the pair of wall portions, The rolling element rolling surfaces formed on each of the pair of wall portions are formed as circular arc grooves each having a single arc, so that the first rolling element and the two rolling element rolling surfaces contact each other at one point, The rolling guide device is characterized in that the movable member is provided with a second rolling body that performs a rolling motion by contacting an outer end portion of a portion constituting one of the pair of wall portions constituting the track member, the outer end portion being a portion facing the movable member.

2. The rolling guide device according to claim 1, A rolling guide device, characterized in that an outer end portion of one of the pair of wall portions that receives contact with the second rolling element in the raceway member is a ground surface that has been subjected to a grinding process.

3. The rolling guide device according to claim 1 or 2, The rolling guide device according to claim 1, wherein the second rolling element is disposed on the movable member via an eccentric shaft.

4. The track member of the rolling guide device according to any one of claims 1 to 3 is installed in a door frame, and a door body is installed on the moving member, thereby performing an opening and closing operation of the door body relative to the door frame. An opening and closing device.

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