JP2017096382A - Motion guide device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To stably guide an article without causing wobbling along a trajectory in which a linear line and a curved line are mixed.SOLUTION: This motion guide device 10 comprises: a trajectory member 11 which includes a linear part 11A and a curved part 11B, and in which a rolling-body rolling groove 11a is formed; a moving member 13 having a load rolling-body rolling groove 13a opposing the rolling-body rolling groove 11a of the trajectory member 11, a non-load return passage 23 extending to a direction in which the rolling-body rolling groove 11a extends in parallel therewith, and a direction conversion path 25 for connecting the load rolling-body rolling groove 13a and the non-load return passage 23; and a plurality of rolling bodies 12 arranged in an infinite circulation path which is constituted of the load rolling-body rolling path 22 between the rolling-body rolling groove 11a of the trajectory member 11 and the load rolling-body rolling groove 13a of the moving member 13, the non-load return passage 23, and the direction conversion path 25. Then, the moving member 13 comprises pressing means 28 which can exert a pressing force to the trajectory member 11 so as to receive the force in a direction in which the pressing means is inclined to the trajectory member.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a motion guide device.

  For example, in a production line in a factory, there is no problem as long as each processing step can be arranged in a straight line, but depending on the installation space of the machine in the factory and the processing content in each processing step, the conveyance direction of the article as the processing object There may be a need to change between two adjacent processing steps. In this case, in general, the pallet changer is changed by using a pallet changer or the like, but there is an inconvenience that installation space and installation cost of the pallet changer are required. Therefore, as a means for changing the conveyance direction of an article without using a pallet changer, a motion guide device capable of continuously guiding the article along a locus in which straight lines and curves are mixed is conventionally known. (For example, see Patent Document 1 below).

  This type of motion guide device generally includes a straight portion and a curved portion formed in an arc shape with a predetermined radius of curvature, and rolling element rolling grooves are formed along the longitudinal direction of both side surfaces. The race member, the loaded rolling element rolling groove facing the rolling member rolling groove of the race member, the no-load return passage extending parallel to the direction in which the rolling element rolling groove extends, and the loaded rolling element rolling groove and the unloaded return A moving member having a direction change path connecting the passage, a loaded rolling element rolling path, a no-load return path, and a direction change between the rolling element rolling groove of the raceway member and the loaded rolling element rolling groove of the moving member. A plurality of rolling elements that are arranged in an infinite circulation path constituted by roads and load a load between the raceway member and the moving member when rolling in the loaded rolling element rolling path. .

JP 2000-346065 A

  By the way, in this type of motion guide device, the moving member can continuously move the linear portion and the curved portion along the track member even when the linear portion and the curved portion are mixed in the track member. Such a design was adopted. That is, for infinite circulation in the endless circulation path, and for smooth rolling of a plurality of rolling elements that load a load between the raceway member and the moving member when rolling in the loaded rolling element rolling path, It has been attempted to design the outer dimension of the curved portion of the raceway member with a certain allowance. That is, when the moving member moves on the linear portion of the track member, all the rolling elements that roll in the loaded rolling element rolling path roll while applying a load. A linear guide motion can be stably performed with respect to the straight portion. However, when the moving member moves along the curved portion of the track member, the plurality of rolling elements rolling in the loaded rolling element rolling path roll along the curved portion of the track member provided with allowance. Therefore, the moving member that performs the curve guiding motion with respect to the curved portion has a problem that a predetermined amount of rattling may occur with respect to the track member.

  However, depending on the use of the motion guide device, when the moving member moves along the straight portion and the curved portion of the track member, it is necessary to perform a guide motion without rattling on all the tracks. Therefore, it has been demanded to provide a motion guide device capable of stably guiding an article without rattling when the article is continuously guided along a locus in which straight lines and curves are mixed.

  The present invention has been made in view of the existence of the above-described problems of the prior art, and its purpose is to provide stable and stable play when an article is continuously guided along a locus in which straight lines and curves are mixed. An object of the present invention is to provide a motion guide device capable of guiding an article.

  A motion guide device according to the present invention includes a linear member and a curved member formed in an arc shape with a predetermined radius of curvature, and a raceway member in which rolling element rolling grooves are respectively formed along the longitudinal direction of both side surfaces; , A loaded rolling element rolling groove facing the rolling element rolling groove of the track member, a no-load return passage extending in parallel with a direction in which the rolling element rolling groove extends, and the loaded rolling element rolling groove and the A moving member having a direction changing path connecting an unloaded return path, and a loaded rolling element rolling path between the rolling element rolling groove of the raceway member and the loaded rolling element rolling groove of the moving member, A plurality of loads arranged between the track member and the moving member when rolling in the loaded rolling element rolling path arranged in an infinite circulation path constituted by an unloaded return path and the direction changing path. A motion guide device comprising: The moving member is characterized in further comprising a pressing means exert a pressing force to receive a force in a direction inclined with respect to the track member.

  ADVANTAGE OF THE INVENTION According to this invention, when guiding articles | goods continuously along the locus | trajectory in which the straight line and the curve were mixed, the exercise | movement guide apparatus which can guide an article | item stably without rattling can be provided.

It is an external appearance perspective view which shows the whole structure of the exercise | movement guide apparatus which concerns on this embodiment. It is a top view of the exercise guidance device concerning this embodiment. It is a side view of the exercise | movement guide apparatus which concerns on this embodiment. It is a longitudinal cross-sectional side view of the exercise | movement guide apparatus which concerns on this embodiment. It is the whole schematic for performing schematic structure and operation | movement description of the exercise | movement guide apparatus which concerns on this embodiment. It is a partial fracture appearance perspective view which illustrates one form of a linear guide device constituted by a movement block and track rail concerning this embodiment. It is sectional drawing for demonstrating the infinite circuit provided with the linear guide apparatus shown in FIG. It is a figure for demonstrating the operation state of the exercise | movement guide apparatus which concerns on this embodiment. It is a figure which shows the modification of the movement guide apparatus which concerns on this invention. It is a figure which shows a part of various forms which the track rail which concerns on this invention can take.

  DESCRIPTION OF EMBODIMENTS Hereinafter, preferred embodiments for carrying out the present invention will be described with reference to the drawings. The following embodiments do not limit the invention according to each claim, and all combinations of features described in the embodiments are not necessarily essential to the solution means of the invention. .

  FIG. 1 is an external perspective view showing the overall configuration of the motion guide apparatus according to the present embodiment. 2 is a top view of the motion guide device according to the present embodiment, FIG. 3 is a side view of the motion guide device according to the present embodiment, and FIG. 4 is a motion guide device according to the present embodiment. FIG. Further, FIG. 5 is an overall schematic diagram for explaining the schematic configuration and operation of the motion guide apparatus according to the present embodiment. In this embodiment, the track rail 11 as the track member is installed on the horizontal plane, and the moving block 13 as the moving member assembled to the track rail 11 performs a guide motion in a direction parallel to the horizontal plane. The direction in the description is defined and explained.

  A motion guide apparatus 10 according to this embodiment shown in FIGS. 1 to 5 is a track rail 11 as a track member, and is assembled in series with the track rail 11 and movable in the longitudinal direction of the track rail 11. Two moving blocks 13, two plate members 31 fixedly installed on the upper surfaces of the two moving blocks 13 arranged in series, and two rotary bearings 41 attached to the upper surfaces of the two plate members 31, respectively. The slider plate member 51 is attached so as to connect the two rotary bearings 41 to the upper surfaces of the two rotary bearings 41. In the present embodiment, the moving member according to the present invention is configured by a combination of the moving block 13 and the plate member 31.

  As schematically shown in FIG. 5, the track rail 11 includes a straight portion 11 </ b> A formed to extend linearly, a curved portion 11 </ b> B formed in an arc shape with a predetermined radius of curvature, and the straight portions 11 </ b> A. And a connecting portion 11C that connects the curved portion 11B. Further, the track rail 11 according to the present embodiment is configured such that the track width (that is, the width dimension in the left-right direction) in the curved portion 11B constituting the track rail 11 is narrower than the track width in the straight portion 11A. The connecting portion 11C connecting the linear portion 11A and the curved portion 11B having different track widths has a track width extending from one end portion to the other end portion in order to smoothly connect the linear portion 11A and the curved portion 11B. Thus, the trajectory width of the straight portion 11A is temporarily reduced to the trajectory width of the curved portion 11B. Further, the track rail 11 formed by continuously connecting the straight portion 11A, the connecting portion 11C, and the curved portion 11B has a configuration in which rolling element rolling grooves 11a are formed along the longitudinal direction of the left and right side surfaces. doing.

  Two moving blocks 13 arranged in series are provided for one track rail 11 according to this embodiment described above. Here, a specific configuration of the moving block 13 and the track rail 11 according to the present embodiment will be described with reference to FIGS. 6 and 7. 6 is a partially broken external perspective view illustrating an embodiment of the linear guide device 10a including the moving block 13 and the track rail 11 according to this embodiment, and FIG. 7 is shown in FIG. It is sectional drawing for demonstrating the infinite circuit provided with the linear guide apparatus 10a.

  First, the configuration of the linear guide device 10a illustrated in FIGS. 6 and 7 will be described. The linear guide device 10a according to this embodiment includes a track rail 11 and balls 12 installed on the track rail 11 as a plurality of rolling elements. And a moving block 13 which is slidably mounted via. The track rail 11 is a long member whose cross section perpendicular to the longitudinal direction is formed in a substantially rectangular shape, and the surface (both left and right side surfaces) is a track surface that becomes a track when the balls 12 roll. Are formed over the entire length of the track rail 11.

  In the track rail 11 of this embodiment, the number of rolling element rolling grooves 11a formed on the left and right side surfaces is two in total on the left and right, and a total of four grooves are provided. It can be arbitrarily changed according to the use and specifications of the apparatus 10a.

  On the other hand, the moving block 13 is provided with a loaded rolling element rolling groove 13a as a raceway surface that becomes a track when the balls 12 roll at positions facing the rolling element rolling grooves 11a. The rolling element rolling grooves 11a of the track rail 11 and the loaded rolling element rolling grooves 13a of the moving block 13 form a loaded rolling element rolling path 22 and a plurality of balls 12 are arranged. Further, four unloaded return passages 23 extending in parallel to the rolling element rolling grooves 11a, and the unloaded return passages 23 and the loaded rolling element rolling paths 22 are connected to the moving block 13. Direction change paths 25 are provided. One infinite circulation path is configured by a combination of one loaded rolling element rolling path 22 and no-load return path 23 and a pair of direction changing paths 25 connecting them (see FIG. 7).

  A plurality of balls 12 are arranged and installed in an infinite circulation path composed of a loaded rolling element rolling path 22, a no-load return path 23, and a pair of direction changing paths 25, 25 so as to allow infinite circulation, When rolling in the loaded rolling element rolling path 22, the rolling block 13 rolls while applying a load between the track rail 11 and the moving block 13. It becomes possible to perform reciprocating motion.

  In the present embodiment, the linear guide device 10a having the above-described configuration is connected to the two moving blocks 13 arranged in series with respect to one track rail 11 by a coil spring 28 as a pressing unit. ing. As a specific installation form of the coil spring 28 according to the present embodiment, the coil spring 28 is installed between two plate members 31 fixedly installed on the upper surfaces of the two movable blocks 13 arranged in series. In addition, the coil spring 28 is more specifically a position biased in either the left or right direction from the central axis of the track rail 11 extending in the longitudinal direction when the motion guide device 10 according to the present embodiment is viewed from the upper surface side. Are arranged at positions deviated in the direction of the outer peripheral side of the curved shape of the curved portion 11B of the track rail 11, and can exert a pressing force based on the spring elastic force in a direction along the longitudinal direction of the track rail 11. (Refer to FIG. 5). Accordingly, the two moving blocks 13 arranged in series are pushed by the coil spring 28 in a direction inclined in the horizontal direction with respect to the longitudinal direction of the track rail 11, that is, in a direction rotating in the yawing direction (MB direction). A pressure (spring elastic force) is applied. That is, in FIG. 5, when the motion guide device 10 according to the present embodiment is viewed from above, as shown by the motion guide device 10 positioned on the curved portion 11 </ b> B of the track rail 11, the two moving blocks 13 are perpendicular to the paper surface. The coil spring 28 installed at the lower position on the paper surface in a state where it is arranged at the left and right positions with respect to the paper surface when viewed in the direction moves the moving block 13 on the right side of the paper surface in the counterclockwise direction with respect to the paper surface. The spring elastic force is applied so as to incline in the horizontal direction, and the spring elastic force is applied to incline the moving block 13 on the left side of the paper in the clockwise direction and in the horizontal direction with respect to the paper. .

  By the way, in the exercise | movement guide apparatus which concerns on a prior art, the structure which rolls at least 3 ball | bowl under load was employ | adopted in the some load rolling-element rolling path which one moving block has. That is, in the prior art, the guide motion of the moving block with respect to the track rail is performed by the ball contacting the track rail at three points. However, in the conventional technology that employs a system consisting of three-point contact of balls, when the moving block moves on the curved portion of the track rail, a plurality of balls that roll in the rolling rolling element rolling path are provided with play allowance. Therefore, a predetermined amount of rattling occurs with respect to the track rail in the moving block that performs the curve guiding motion with respect to the curve portion. Therefore, in the motion guide device 10 according to the present embodiment, a configuration is adopted in which a guide motion of the moving block 13 with respect to the track rail 11 is performed when the ball contacts the track rail 11 at two points. That is, in the present embodiment, the moving block 13 is installed on the track rail 11 by bringing the ball 12 into contact with the track rail 11 at two points from the left and right sides and sandwiching the ball 12. The two-point contact of the ball 12 is realized by the pressing force based on the spring elastic force of the coil spring 28. By the action of the coil spring 28, the motion guide apparatus 10 according to the present embodiment can guide the article stably without rattling when continuously guiding the article along a locus in which straight lines and curves are mixed. It is a possible device.

  The specific reason will be described with reference to FIG. That is, in FIG. 5, when the two moving blocks 13 are positioned on the straight portion 11 </ b> A of the track rail 11 as shown by the motion guide device 10 positioned on the straight portion 11 </ b> A of the track rail 11, All balls 12... Rolling on are subjected to a load between the track rail 11 and the moving block 13. In FIG. 5, the state in which the balls 12 are subjected to a load is shown by shading.

  On the other hand, in FIG. 5, when the two moving blocks 13 are completely positioned on the curved portion 11B of the track rail 11, as shown by the motion guide device 10 positioned on the curved portion 11B of the track rail 11, the loaded rolling element rolling path Among the balls 12 that roll in the ball 22, only one ball 12 is in a state of receiving a load between the track rail 11 and the moving block 13 in one load rolling element rolling path 22. In other words, in the load rolling element rolling paths 22 respectively arranged with respect to the left and right positions of the track rail 11, one ball 12 in each load rolling element rolling path 22 receives a load. The rail 11 is sandwiched between two balls 12, one on the left and one on the left, and the moving block 13 is installed on the track rail 11 by two-point contact of the balls 12.

  In this embodiment, when the moving block 13 is positioned on the curved portion 11B, only one ball 12 is present in each of the four load rolling element rolling paths 22 formed on the left and right side surfaces of the track rail 11. In two loaded rolling element rolling paths 22 that are in a state of receiving a load and are symmetrically opposed to the track rail 11 in the left-right direction, each one ball 12 receives a load and makes two-point contact. What is necessary is just to realize the state to do. Such a situation is shown in FIG. 5, but the motion guide device 10 according to this embodiment can be configured to have four load rolling element rolling paths 22 as shown in FIG. In this case as well, in each of the loaded rolling element rolling paths 22..., One ball 12 may receive the load and come into contact with the track rail 11. In the case of this embodiment shown in FIG. 6, there are two sets of two load rolling element rolling paths 22 arranged symmetrically facing the track rail 11 in the left-right direction. The two-point contact of the ball 12 is realized for each group that the load rolling element rolling path 22 constitutes. Such a configuration is also within the scope of the present invention.

  As a result of the coil spring 28 acting in this way, the moving block 13 is rotated in the direction inclined in the horizontal direction with respect to the longitudinal direction of the track rail 11, that is, in the yawing direction (MB direction). The balls 12 to be received are positioned between the track rail 11 and the moving block 13 by two-point contact (in the present invention, including a plurality of sets of two balls that make two-point contact). Therefore, the moving block 13 can stably perform a guide motion with respect to the track rail 11 without rattling.

  One rotary bearing 41 is installed above each of the two plate members 31 on which the coil springs 28 are installed. In the rotary bearing 41 according to this embodiment, as shown in FIG. 4 and the like, the outer ring of the rotary bearing 41 is fixed to the plate member 31 with a bolt or the like, while the inner ring of the rotary bearing 41 is a slider plate member. 51 is fixed. That is, one rotation bearing 41 is installed for each of the two plate members 31, and the outer ring of each plate member 31 and each rotation bearing 41 is fixed. On the other hand, the inner rings of the two rotary bearings 41 are connected by a single slider plate member 51. And the rotation bearing 41 of this embodiment can carry out a relative rotational movement in the free state without an inner and outer ring | wheel being restrained. Therefore, it is assumed that the moving blocks 13 on which the plate members 31 are installed receive the elastic force of the coil spring 28 and change the amount of inclination in the horizontal direction of each other, that is, the amount of rotation in the yawing direction (MB direction). In addition, the connection state of the two plate members 31 by the single slider plate member 51 is preferably maintained. That is, the slider plate member 51 according to the present embodiment is arranged so as to connect and integrate two moving blocks 13 arranged in series. The two moving blocks 13 arranged in series perform a guiding motion while slightly changing the positions of the moving blocks 13 with respect to the track rail 11 by the action of the coil spring 28. Due to the presence of the bearing 41, a suitable connection state of the slider plate member 51 to the two moving blocks 13 is maintained in any state.

  The specific configuration of the motion guide apparatus 10 according to the present embodiment has been described above with reference to FIGS. Next, in addition to the reference drawing of FIG. 8, the operation state of the motion guide apparatus 10 according to the present embodiment will be described. Here, FIG. 8 is a figure for demonstrating the operation state of the exercise | movement guide apparatus 10 which concerns on this embodiment. In FIG. 8, the state in which the balls 12 are subjected to a load is shown by shading, and the two moving blocks 13 are formed from the left side of the page when the page of FIG. 8 is viewed in the vertical direction. A case of moving toward the right side is assumed.

  8 shows a state in which the two moving blocks 13 are positioned on the straight portion 11A of the track rail 11. In the partial diagram (a) in FIG. When the two moving blocks 13 are positioned on the straight portion 11A of the track rail 11, all the balls 12 that roll in the loaded rolling element rolling path 22 receive a load between the track rail 11 and the moving block 13. It is in the state.

  When the two moving blocks 13 move toward the right side of the page with respect to the track rail 11 and the moving block 13 on the right side, that is, the leading side in the moving direction, reaches the connecting portion 11C of the track rail 11, the track that the connecting portion 11C has. Due to the shape in which the width decreases for a while, a part of the balls 12 of the moving block 13 on the leading side shifts to a state where it is not subjected to a load even though it is in the load rolling element rolling path 22 (partition diagram in FIG. 8 ( b)).

  Further, the two moving blocks 13 move toward the right side of the page with respect to the track rail 11, and the position of the partial diagram (c) in FIG. When it completely reaches 11 connecting portions 11C, only one ball 12 is loaded in the load rolling element rolling path 22 on one side (upper side of the drawing) of the moving block 13 on the leading side in the moving direction. The other balls 12 are in an unloaded state. However, the balls 12 in the load rolling element rolling path 22 on the other side (the lower side in the drawing) of the moving block 13 on the leading side in the moving direction are in a state where all the balls 12 are subjected to a load. .

  Further, the two moving blocks 13 move toward the right side of the page with respect to the track rail 11, and the position of the partial diagram (d) in FIG. When it completely reaches the curved portion 11B, the moving block 13 on the leading side in the moving direction is inclined with respect to the track rail 11 (reverse to the paper surface) by the action of the spring elastic force exerted by the coil spring 28 as the pressing means. Receive force in a clockwise direction). At this time, in the moving block 13 on the leading side in the moving direction, one of the balls 12... Rolling in the loaded rolling element rolling path 22 of the moving block 13 is one in the loaded rolling element rolling path 22. Only one ball 12 is in a state of receiving a load between the track rail 11 and the moving block 13. That is, in the load rolling element rolling paths 22 respectively arranged with respect to the left and right positions of the track rail 11, one ball 12 in each load rolling element rolling path 22 receives a load. Therefore, the track rail 11 is sandwiched between two balls 12, one on the left and one on the left, and the moving block 13 is installed on the track rail 11 by two-point contact of the balls 12. As described above, in the present embodiment, when the moving block 13 is positioned on the curved portion 11B, one is provided for each of the four load rolling element rolling paths 22 formed on the left and right side surfaces of the track rail 11. Only the ball 12 is in a state of receiving a load, and in each of the two load rolling element rolling paths 22 disposed symmetrically opposite to the track rail 11 in the left-right direction, each one ball 12 receives the load. Thus, a state where two points are in contact is realized. Such a situation is shown in FIG. And in the motion guide apparatus 10 according to the present embodiment, there are two sets of two load rolling element rolling paths 22 arranged symmetrically facing the track rail 11 in the left-right direction. The two-point contact of the ball 12 is realized for each group formed by the two load rolling element rolling paths 22.

  8, the moving block 13 located on the rear side with respect to the moving direction is located at the boundary between the linear portion 11A and the connecting portion 11C of the track rail 11. Therefore, the state shows the same state as the moving block 13 on the head side in the case of the partial diagram (b) in FIG.

  Further, the two moving blocks 13 move toward the right side of the page with respect to the track rail 11, and the position of the partial diagram (e) in FIG. 8, that is, both of the two moving blocks 13 are curves of the track rail 11. When the position of the part 11B is reached, the spring elastic force exerted by the coil spring 28 as the pressing means acts as a pressing force for tilting the two moving blocks 13, and the load of the moving blocks 13 in the two moving blocks 13 Of the balls 12 that roll in the rolling element rolling path 22, only one ball 12 receives a load between the track rail 11 and the moving block 13 in one loaded rolling element rolling path 22. Become. That is, in the load rolling element rolling paths 22 respectively arranged with respect to the left and right positions of the track rail 11, one ball 12 in each load rolling element rolling path 22 receives a load. Therefore, the track rail 11 is sandwiched between two balls 12, one on the left and one on the left, and the moving block 13 is installed on the track rail 11 by two-point contact of the balls 12. As described above, in the present embodiment, when the moving block 13 is positioned on the curved portion 11B, one is provided for each of the four load rolling element rolling paths 22 formed on the left and right side surfaces of the track rail 11. Only the ball 12 is in a state of receiving a load, and in each of the two load rolling element rolling paths 22 disposed symmetrically opposite to the track rail 11 in the left-right direction, each one ball 12 receives the load. Thus, a state where two points are in contact is realized. Such a situation is shown in FIG. And in the motion guide apparatus 10 according to the present embodiment, there are two sets of two load rolling element rolling paths 22 arranged symmetrically facing the track rail 11 in the left-right direction. The two-point contact of the ball 12 is realized for each group formed by the two load rolling element rolling paths 22.

  In FIG. 8, the two moving blocks 13 are described by way of example as moving from the straight line portion 11 </ b> A of the track rail 11 toward the curved portion 11 </ b> B via the connecting portion 11 </ b> C. The load state of the balls 12 rolling on the rolling element rolling path 22 is the same regardless of which direction the moving block 13 moves. In the motion guide apparatus 10 according to the present embodiment, the coil block 28 exerts a pressing force as a spring elastic force as described above, so that the moving block 13 is in the horizontal direction with respect to the longitudinal direction of the track rail 11. The ball 12, which is rotated in the tilting direction, that is, the yawing direction (MB direction), is subjected to two-point contact (in the present invention, there are a plurality of sets of two balls that make two-point contact). Therefore, the moving block 13 can stably perform the guide motion with respect to the track rail 11 without rattling.

  In the motion guide device 10 according to the present embodiment, it is assumed that the driving force for driving the two moving blocks 13 along the driving rails 11 is obtained from the outside, so that the driving force is exerted between the two moving blocks 13. The pressing force from the coil spring 28 is generated in a driven manner. In other words, the pressing force of the coil spring 28 according to the present embodiment is not actively controlled, but is acted on passively. Therefore, the motion guide apparatus 10 according to the present embodiment has an advantageous effect that complicated control is unnecessary. Since the motion guide apparatus 10 according to the present embodiment does not require complicated control, there is no need to additionally install a member such as a control apparatus, so that the entire apparatus can be made compact. Furthermore, the motion guide apparatus 10 according to the present embodiment is configured so that the ball 12 that receives a load is in a two-point contact (in the present invention, two points that are in two-point contact) regardless of whether the movement is performed in the forward or backward direction. It is located between the track rail 11 and the moving block 13 by including a plurality of sets of balls). That is, the motion guide apparatus 10 according to the present embodiment can be used in any posture state, and has an advantage of high versatility.

  As mentioned above, although preferred embodiment of this invention was described, the technical scope of this invention is not limited to the range as described in the said embodiment. Various modifications or improvements can be added to the embodiment.

  For example, in the above-described embodiment, the case where the coil spring 28 is used as the pressing means that exerts a pressing force between the two moving blocks 13 is illustrated. However, the pressing means according to the present invention is not limited to the coil spring 28 described above, and other elastic bodies such as rubber or a pressing mechanism such as a cylinder may be employed.

  Further, for example, the coil spring 28 as the pressing means according to the present embodiment described above can exert a pressing force in a direction along the longitudinal direction of the track rail 11. However, as the pressing means according to the present invention, it is possible to employ a pressing means that can exert a pressing force in a direction orthogonal to the longitudinal direction of the track rail 11 as the track member. An example of the case where such pressing means is employed will be described with reference to FIG. In addition, FIG. 9 is a figure which shows the modification of the movement guide apparatus based on this invention. In FIG. 9, members that are the same as or similar to those in the above-described embodiment are denoted by the same reference numerals and description thereof is omitted.

  The motion guide device 90 according to the modified example illustrated in FIG. 9 includes one moving block 13 and a ball plunger 91 installed on the moving block 13. The ball plunger 91 is a member that can exert a pressing force in a direction horizontal to the track rail 11 and in a direction orthogonal to the longitudinal direction of the track rail 11. A force is received in the direction in which the moving block 13 is inclined in the horizontal direction with respect to the rail 11, that is, the direction in which the moving block 13 rotates in the yawing direction (MB direction). That is, due to the pressing force from the ball plunger 91, the moving block 13 can stably perform a guide motion with respect to the track rail 11 without rattling.

  Furthermore, in the above-described embodiment, the track rail 11 including one linear portion 11A, one curved portion 11B, and a connecting portion 11C that connects them has been described as an example. Anything can be adopted. For example, FIG. 10 is a diagram showing a part of various forms that can be taken by the track rail according to the present invention. As shown in FIG. 10, the O-shape, U-shape, L-shape, S In the present invention, it is possible to employ track rails of any shape such as a letter shape.

  Furthermore, in the rotary bearing 41 according to this embodiment described above, the outer ring of the rotary bearing 41 is fixed to the plate member 31 with bolts or the like, while the inner ring of the rotary bearing 41 is fixed to the slider plate member 51. It was fixed. However, the reverse mounting state can be adopted for the mounting relationship between the inner and outer rings of the rotary bearing 41. That is, the inner ring of the rotary bearing 41 may be fixed to the plate member 31 and the outer ring of the rotary bearing 41 may be fixed to the slider plate member 51.

  Furthermore, in the above-described embodiment, the case where the ball 12 is used as the rolling element is illustrated, but the rolling element applicable to the present invention is not limited to the ball 12. For example, it is possible to employ all types of rolling elements such as rollers and rollers.

  Furthermore, in this embodiment described above, the moving member according to the present invention is configured by the combination of the moving block 13 and the plate member 31. However, in the present invention, the plate member 31 can be omitted, and the moving member according to the present invention can be configured by the moving block 13 alone. In this case, the coil spring 28 as the pressing means according to the present invention may be installed on the moving block 13. Furthermore, the shape of the plate member of the present invention is not limited to that shown in the above-described embodiment, and any form of plate member can be employed.

  It is apparent from the description of the scope of claims that embodiments with such changes or improvements can be included in the technical scope of the present invention.

  10, 90 motion guide device, 10a linear guide device, 11 track rail, 11a rolling element rolling groove, 11A linear portion, 11B curved portion, 11C connecting portion, 12 balls, 13 moving block, 13a loaded rolling element rolling groove, 22 Loaded rolling element rolling path, 23 No-load return path, 25 direction changing path, 28 coil spring, 31 plate member, 41 rotary bearing, 51 slider plate member, 91 ball plunger.

Claims (5)

A track member including a linear portion and a curved portion formed in an arc shape with a predetermined radius of curvature, and each of which has rolling element rolling grooves formed along the longitudinal direction of both side surfaces;
A load rolling element rolling groove facing the rolling element rolling groove of the raceway member, a no-load return passage extending in parallel with a direction in which the rolling element rolling groove extends, and the load rolling element rolling groove and the non-loading groove A moving member having a direction change path connecting the load return path;
An infinite circuit constituted by a loaded rolling element rolling path between the rolling element rolling groove of the track member and the loaded rolling element rolling groove of the moving member, the no-load return path, and the direction changing path. A plurality of rolling elements that load a load between the track member and the moving member when rolling in the loaded rolling element rolling path,
An exercise guidance device comprising:
The movement guide device according to claim 1, wherein the moving member includes pressing means for applying a pressing force so as to receive a force in a direction inclined with respect to the track member. The motion guide device according to claim 1,
A motion guide device, wherein a plurality of moving members are installed on the track member, and the plurality of moving members are connected by the pressing means. The motion guide apparatus according to claim 2,
The motion guide device, wherein the pressing means is disposed at a position deviated from a central axis of the track member extending in the longitudinal direction. In the exercise | movement guide apparatus of Claim 2 or 3,
Each of the plurality of moving members is
A moving block constituting a linear guide device in cooperation with the track member;
A plate member on which the pressing means is installed;
In addition,
Each of the plurality of plate members is provided with a rotary bearing to which either an inner ring or an outer ring is attached,
A motion guide device comprising a slider plate member to which either the inner ring or the outer ring of the rotary bearing is attached so as to connect the plurality of rotary bearings. In the exercise | movement guide apparatus of any one of Claims 1-4,
A motion guide apparatus characterized in that a track width in a curved portion of the track member is smaller than a track width in a straight portion.