Parallel Linear Guide

Abstract

To enable a supported body to move more smoothly along a guide rail in a parallel linear guide. [Solution] The parallel linear guide comprises first and second linear guide rails that extend linearly in a first direction and are arranged parallel to each other in a second direction perpendicular to the first direction, first and second guide blocks that are attached to the linear guide rails, respectively, and are movable along the linear guide rails, and first and second bases that are fixed to the first and second guide blocks, respectively. The parallel linear guide further comprises first and second elastic members that are sandwiched between the upper surface of the first base and the lower surface of the supported object and between the upper surface of the second base and the lower surface of the supported object, and a plate-shaped flexible member that is located between the first and second linear guide rails and allows the first base to move in the up and down direction.

Description

[Technical field]

[0001] The present invention relates to a parallel linear guide. [Background technology]

[0002] Patent Document 1 discloses a feed mechanism having guide rails arranged in parallel. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Unexamined Utility Model Publication No. Hei 2-30565 Summary of the Invention [Problem to be solved by the invention]

[0004] In the mechanism disclosed in Patent Document 1, distortion is concentrated in areas where the parallelism of the guide rails is low, resulting in large resistance to movement between the guide block and the guide rail, which is a factor that hinders smooth movement of the supported object.

[0005] SUMMARY OF THE PRESENT DISCLOSURE In view of the above, an object of the present invention is to enable a supported object to move more smoothly along a guide rail in a parallel linear guide equipped with a feed mechanism having guide rails arranged in parallel. [Means for solving the problem]

[0006] A parallel linear guide according to one aspect of the present invention is a parallel linear guide capable of moving a supported object in a predetermined direction while supporting it from below. The parallel linear guide includes first and second linear guide rails that extend linearly in a first direction and are arranged parallel to each other in a second direction perpendicular to the first direction, first and second guide blocks that are attached to the first and second linear guide rails, respectively, and are movable along the linear guide rails, and first and second bases that are fixed to the upper surfaces of the first and second guide blocks, respectively. The parallel linear guide further includes first and second elastic members that are sandwiched between the upper surface of the first base and the lower surface of the supported object and between the upper surface of the second base and the lower surface of the supported object, and a plate-like flexible member that is located between the first and second linear guide rails that are arranged in parallel and allows the first base to move in the up-down direction. An end of the flexible member on the first base side in the second direction is fixed to an end of the first base, and an end of the flexible member on the second base side in the second direction is fixed to the lower surface of the supported object. Effect of the Invention

[0007] According to the present invention, even if the first linear guide rail and the second linear guide rail have low parallelism at some places, the first and second elastic members can absorb distortion caused by fluctuations in the distance between the first and second guide blocks during movement. Also, even if the first linear guide rail and the second linear guide rail have low horizontality at some places, the first elastic member, the second elastic member, and the flexible member can absorb distortion caused by fluctuations in the height of the first guide block and the second guide block during movement. This can reduce the resistance force generated when the first and second guide blocks move, allowing the supported object to move more smoothly along the guide rails. [Brief description of the drawings]

[0008] [Figure 1] FIG. 1 is a plan view illustrating a parallel linear guide according to an embodiment of the present invention. [Diagram 2] FIG. 2 is a front view illustrating the parallel linear guide. [Diagram 3] FIG. 3 is a side view illustrating the parallel linear guide. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] [Parallel linear guide configuration] A parallel linear guide 1 according to an embodiment of the present invention will be described in detail with reference to the drawings.

[0010] Fig. 1 is a plan view illustrating a parallel linear guide 1 according to an embodiment of the present invention. Fig. 2 is a front view illustrating the parallel linear guide 1. Fig. 3 is a side view illustrating the parallel linear guide 1. In Fig. 1, part of the configuration is indicated by a two-dot chain line for ease of understanding.

[0011] The parallel linear guide 1 shown in Figure 1 can be attached to a building, for example, and can function as a vibration control device that reduces vibrations caused in the building by wind or earthquakes by moving the supported body 100 in a predetermined direction along the parallel linear guides.

[0012] In this embodiment, the supported object 100 is a plate. The supported object 100, which is a plate, may itself be a weight having a predetermined weight, or a weight functioning as a weight may be placed on the supported object 100.

[0013] As shown in Figs. 1 and 2, the parallel linear guide 1 includes a first linear guide rail 10 and a second linear guide rail 20. The first linear guide rail 10 and the second linear guide rail 20 each extend linearly in a first direction. The first linear guide rail 10 and the second linear guide rail 20 are arranged parallel to each other in a second direction perpendicular to the first direction. That is, the parallel linear guide 1 includes the first linear guide rail 10 and the second linear guide rail 20 in parallel.

[0014] The Y direction in Figures 1 and 2 corresponds to the first direction. The Y direction is referred to as the movement direction of the parallel linear guide 1. The X direction perpendicular to the Y direction corresponds to the second direction. The X direction is referred to as the width direction of the parallel linear guide 1. The Z direction is referred to as the height direction (or up-down direction) of the parallel linear guide 1.

[0015] 1, the first linear guide rail 10 extends in the Y direction and includes two guide rails 11 and 12 arranged parallel to the X direction. The second linear guide rail 20 extends in the Y direction and includes two guide rails 21 and 22 arranged parallel to the X direction.

[0016] Guide rails 11, 12 are fixed to a part of a building while being maintained parallel at a predetermined interval by rail base 13. Guide rails 21, 22 are fixed to a part of a building while being maintained parallel at a predetermined interval by rail base 23. The rail bases 13, 23 also maintain the first linear guide rail 10 and second linear guide rail 20 in parallel.

[0017] The parallel linear guide 1 includes a first guide block 30 and a second guide block 40. The first guide block 30 is attached to a first linear guide rail 10 and is movable along the first linear guide rail 10. The second guide block 40 is attached to a second linear guide rail 20 and is movable along the second linear guide rail 20.

[0018] As shown in Figs. 1 and 2, the first guide block 30 is composed of four guide blocks 31, 32, 33, and 34. The guide blocks 31 and 33 are arranged in parallel in the extension direction (Y direction) on the guide rail 11 constituting the first linear guide rail 10. The guide blocks 32 and 34 are arranged in parallel in the extension direction (Y direction) on the guide rail 12 constituting the first linear guide rail 10. Furthermore, the guide block 31 on the guide rail 11 and the guide block 32 on the guide rail 12 are arranged in parallel in the width direction, and the guide block 33 on the guide rail 11 and the guide block 34 on the guide rail 12 are arranged in parallel in the width direction.

[0019] The second guide block 40 is composed of four guide blocks 41, 42, 43, and 44. The guide blocks 41 and 43 are arranged in parallel in the extension direction (Y direction) on the guide rail 21 constituting the second linear guide rail 20. Moreover, the guide blocks 42 and 44 are arranged in parallel in the extension direction (Y direction) on the guide rail 22 constituting the second linear guide rail 20. Furthermore, the guide block 41 on the guide rail 21 and the guide block 42 on the guide rail 22 are arranged parallel in the width direction, and the guide block 43 on the guide rail 21 and the guide block 44 on the guide rail 22 are arranged parallel in the width direction.

[0020] The parallel linear guide 1 includes a first base 50 and a second base 60. The first base 50 is fixed to the upper surfaces of the four guide blocks 31-34 that constitute the first guide block 30. The second base 60 is fixed to the upper surfaces of the four guide blocks 41-44 that constitute the second guide block 40.

[0021] 2, the parallel linear guide 1 includes a first elastic member 70 and a second elastic member 80. The first elastic member 70 is sandwiched between the upper surface of the first base 50 and the lower surface of the supported object 100, and the second elastic member 80 is sandwiched between the upper surface of the second base 60 and the lower surface of the supported object 100.

[0022] The first elastic member 70 is a generally rectangular flat-plate rubber member, and is in contact with the upper surface of the first base 50 and the lower surface of the supported object 100. The second elastic member 80 is also a flat-plate rubber member, and is in contact with the upper surface of the second base 60 and the lower surface of the supported object 100.

[0023] As long as the first elastic member 70 and the second elastic member 80 are configured to be in close contact with the first base 50 and the supported object 100, they do not need to be physically fastened (fixed) to the first base 50 and the supported object 100. The cushioning effect of the first elastic member 70 and the second elastic member 80 can be enhanced if the first elastic member 70 and the second elastic member 80 are not fastened to the first base 50 and the supported object 100. However, the first and second elastic members 70, 80 may be fixed to the first base 50 and the supported object 100 using bolts or the like so that the first elastic member 70 and the second elastic member 80 do not move between the first base 50 and the supported object 100.

[0024] The parallel linear guide 1 is configured to support the supported object 100 from below by a first base 50 on which the first elastic member 70 is placed and a second base 60 on which the second elastic member 80 is placed. Furthermore, the parallel linear guide 1 is configured such that the supported object 100 moves in the Y direction by the guide blocks 31-34 moving along the guide rails 11, 12 and the guide blocks 41-44 moving along the guide rails 21, 22.

[0025] The parallel linear guide 1 configured as described above further includes a flexible member 90. The flexible member 90 is a substantially rectangular flat member, and is disposed so as to be interposed between the first linear guide rail 10 and the second linear guide rail 20 that are disposed in parallel to each other.

[0026] As shown in Fig. 2, the flexible member 90 is a laminated body in which flat plates are stacked in the vertical direction. The flat plates can be made of composite materials such as metal materials commonly used in the industrial field, fiber reinforced plastics (FRP), fiber-glass reinforced plastics (GFRP), and carbon fiber reinforced plastics (CFRP). By configuring the flexible member 90 with stacked flat plates and changing the number and thickness of the flat plates, the strength in the X direction and the rigidity in the vertical direction can be set independently and appropriately.

[0027] In this embodiment, as an example, one flexible member 90 can be configured by a laminate of six stainless steel plates each having a thickness of 2 to 3 mm.

[0028] An end 91 of the flexible member 90 on the first base 50 side in the X direction is fixed to the end 51 of the first base 50. For example, a bolt 93 inserted from the underside of the first base 50 is screwed into a bolt receiving member 94 arranged on the upper surface of the flexible member 90, thereby achieving the fixation of the end 51 of the first base 50 and the end 91 of the flexible member 90.

[0029] Moreover, an end 92 of the flexible member 90 on the second base 60 side in the X direction is fixed to the underside of the supported member 100. For example, a bolt 95 inserted from the underside of the flexible member 90 is screwed into a screw hole 100h formed in the supported member 100, thereby realizing the fixing of the end 92 of the flexible member 90 to the supported member 100. A spacer member 96 is arranged between the upper surface of the end of the flexible member 90 and the underside of the supported member 100 as necessary.

[0030] The flexible member 90 thus arranged functions as a member that allows the first base 50 and the second base 60 to move in the vertical direction.

[0031] 3, the parallel linear guide 1 further includes a universal joint 110 that connects the second base 60 and the supported object 100. The universal joint 110 includes a first joint portion 111, a second joint portion 112, and a link portion 113.

[0032] The first joint portion 111 has a ball joint 114, and is fastened (fixed) to an end portion 61 (corner portion) of the second base 60 in the Y direction by a bolt 115. The second joint portion 112 has a ball joint 116, and is fastened (fixed) to the lower surface of the supported object 100 by a bolt 117. The link portion 113 extends linearly in the Y direction, and is connected to the ball joint 114 in the first joint portion 111 and the ball joint 116 in the second joint portion 112. The link portion 113 is a cylindrical or rectangular member, and is fixed in the axial direction of the link portion 113. In other words, the link portion 113 is a member that does not move in the Y direction.

[0033] The link portion 113 is connected to the first joint portion 111 and the second joint portion 112 by ball joints 114 and 116 having spherical seats. This allows the link portion 113 and the first joint portion 111, and the link portion 113 and the second joint portion 112 to move in any direction in the universal joint 110. On the other hand, since the universal joint 110 is disposed along the Y direction by the link portion 113, it can support the second base 60 in the Y direction, which is the movement direction of the supported object 100.

[0034] In this way, the universal joint 110 functions to support a force input from the Y direction while allowing displacement of the second base 60 in the X and Z directions, thereby preventing a shear force from being generated in the second elastic member 80 due to a resistance force that impedes movement of the guide blocks 41-44.

[0035] [Effects] The parallel linear guide 1 according to this embodiment is capable of moving the supported object 100 in a predetermined direction (Y direction) while supporting it from below. The parallel linear guide 1 includes a first linear guide rail 10 and a second linear guide rail 20 that extend linearly in a first direction (Y direction) and are arranged parallel to each other in a second direction (X direction) perpendicular to the first direction (Y direction), a first guide block 30 and a second guide block 40 that are attached to the first linear guide rail 10 and the second linear guide rail, respectively, and are movable along the linear guide rails, and a first base 50 and a second base 60 that are fixed to the upper surfaces of the first guide block 30 and the second guide block 40, respectively. The parallel linear guide 1 further includes a first elastic member 70 and a second elastic member 80 sandwiched between the upper surface of the first base 50 and the lower surface of the supported object 100 and between the upper surface of the second base 60 and the lower surface of the supported object 100, and a plate-like flexible member 90 located between the first linear guide rail 10 and the second linear guide rail 20 arranged in parallel and allowing the first base 50 to move in the up and down direction. An end 91 of the flexible member 90 on the first base 50 side in the second direction (Y direction) is fixed to the end 51 of the first base 50, and an end 92 of the flexible member 90 on the second base 60 side in the second direction (Y direction) is fixed to the lower surface of the supported object 100.

[0036] In a guide device equipped with a conventional feed mechanism having parallel guide rails, where the parallelism of the guide rails is low, the resistance to movement of the guide block when it moves along the guide rail increases, hindering smooth movement. In addition, where the parallelism of the guide rails is low, distortion caused by the movement of the guide block is concentrated, which tends to accumulate damage and can cause damage to the device.

[0037] In contrast, according to the parallel linear guide 1 of this embodiment, even if the parallel accuracy between the first linear guide rail 10 and the second linear guide rail 20 varies depending on the location, the distortion caused by the fluctuation in the distance between the first guide block 30 and the second guide block 40 that occurs when the supported object 100 moves along the first and second linear guide rails 10, 20 can be absorbed by the elasticity of the first elastic member 70 and the second elastic member 80.

[0038] The parallel linear guide 1 also includes a flexible member 90 that is provided between the first linear guide rail 10 and the second linear guide rail 20, and has one end connected to the first base 50 and the other end connected to the supported object 100.

[0039] The flexible member 90 plays a role in transmitting, when a force acts on the supported object 100 in a first direction (X direction), the force to the first base 50 without passing through the first elastic member 70 and the second elastic member 80. For this reason, in the vertical direction (Z direction), the parallel linear guide 1 has a buffering effect due to the first elastic member 70 and the second elastic member 80 being compressed by the supported object 100 and due to the elastic deformation of the flexible member 90, and when a force acts in the first direction (X direction), the force is transmitted by the flexible member 90, thereby preventing a shear force from acting on the first elastic member 70 and the second elastic member 80.

[0040] In other words, the parallel linear guide 1, by comprising the first and second elastic members 70, 80 and the flexible member 90, constitutes a soft coupling mechanism having a cushioning function in the vertical and horizontal directions when the first and second guide blocks 30, 40 supporting the supported body 100 move along the first and second linear guide rails 10, 20.

[0041] For this reason, even if the horizontal accuracy between the first linear guide rail 10 and the second linear guide rail 20 varies depending on the location, the parallel linear guide 1 can absorb distortion caused by fluctuations in the height of the first guide block 30 and the second guide block 40 that occur when the supported object 100 moves along the first linear guide rail 10 and the second linear guide rail 20, by the elasticity of the first elastic member 70 and the elasticity of the second elastic member 80, and the bending of the bending member 90.

[0042] In other words, the parallel linear guide 1 can absorb distortion caused by variations in horizontal accuracy between the first linear guide rail 10 and the second linear guide rail 20 through a cushioning action that combines "rubber elasticity" and "spring elasticity."

[0043] Therefore, the parallel linear guide 1 can more effectively reduce the movement resistance occurring between the first linear guide rail 10 and the first guide block 30, or between the second linear guide rail 20 and the second guide block 40. This allows the supported object 100 to move more smoothly. As a result, it is also possible to extend the life of the parallel linear guide 1.

[0044] In the parallel linear guide 1, the first elastic member 70 and the second elastic member 80 are flat rubber members, and the first elastic member 70 abuts against the upper surface of the first base 50 and the lower surface of the supported body 100, and the second elastic member 80 abuts against the upper surface of the second base 60 and the lower surface of the supported body 100.

[0045] The first elastic member 70 is not fixed to the first base 50 and the supported object 100, and the second elastic member 80 is not fixed to the second base 60 and the supported object 100. By configuring the first and second elastic members 70, 80 to be sandwiched between the first and second bases 50, 60 and the supported object 100 in this manner, the first and second elastic members 70, 80 are easily deformed, and the cushioning function of the first elastic member 70 and the second elastic member 80 can be improved.

[0046] Furthermore, in the parallel linear guide 1, the flexible member 90 is a laminated body in which flat plates are laminated in the vertical direction, and the strength in the X direction and the rigidity in the vertical direction can be set independently and appropriately.

[0047] In the parallel linear guide 1, the flexible member 90 is required to support a load in the X direction and to bend in the vertical direction (Z direction). If the flexible member were to be made of a single plate, it would need to be an extremely wide and thin plate in order to have a cross-sectional area sufficient to support a load in the X direction and reduce the rigidity in the vertical direction. On the other hand, by making the flexible member 90 out of stacked flat plates, it is possible to make it smaller in size and fit it into the dimensions required for the parallel linear guide 1 while still performing the same function. Furthermore, by changing the number and thickness of the flat plates, the strength in the X direction and the rigidity in the vertical direction can be set independently and appropriately.

[0048] This allows the parallel linear guide 1 to be able to support loads in the X direction while also being able to deflect in the vertical direction, and prevents excessive forces from being generated in the vertical direction of the parallel linear guide 1 even if there is variation in the horizontal accuracy between the first linear guide rail 10 and the second linear guide rail 20.

[0049] Moreover, the parallel linear guide 1 further includes a universal joint 110 that connects the second base 60 and the supported object 100. The universal joint 110 includes a first joint portion 111 fixed to an end portion 61 in the first direction (Y direction) of the second base 60, a second joint portion 112 fixed to the lower surface of the supported object 100, and a link portion 113 that extends linearly in the first direction (Y direction) and connects to the first joint portion 111 and the second joint portion 112.

[0050] The universal joint 110 plays a role in supporting the second elastic member 80, which is responsible for the buffering action between the second base 60 and the supported object 100, only in the first direction (Y direction). This prevents the second elastic member 80 from being subjected to an excessive shear force due to the movement resistance force generated between the second linear guide rail 20 and the second guide block 40.

[0051] The parallel linear guide 1 has a buffering effect in the X direction and the up-down direction (Z direction) due to the elastic deformation of the second elastic member 80, and is further supported in the Y direction by the rigidity of the universal joint 110.

[0052] As a result, distortion caused by fluctuations in all directions of the first guide block 30 and the second guide block 40 can be absorbed by the first elastic member 70, the second elastic member 80, the flexible member 90 and the universal joint 110, making it possible for the supported object 100 to move more smoothly.

[0053] In the universal joint 110, the link portion 113 and the first joint portion 111, and the link portion 113 and the second joint portion 112 can move in any direction due to the spherical seats. On the other hand, in the parallel linear guide 1, movement in the Y direction between the supported object 100 and the second base 60 is restricted by the link portion 113 within a range that does not interfere with the cushioning effect between the second base 60 and the supported object 100 by the second elastic member 80.

[0054] Therefore, in the parallel linear guide 1, when a movement resistance force or an inertial force that is difficult to absorb by the elastic force of the second elastic member 80 acts in the Y direction, for example, when the supported object 100 moves, the movement in the Y direction between the supported object 100 and the second base 60 is restricted by the link portion 113. Therefore, it is possible to prevent the second elastic member 80 from being subjected to excessive shear stress.

[0055] In particular, the universal joint 110 is a member that physically connects the second base 60 and the supported object 100, and is disposed parallel to the second guide rail 20. For this reason, the universal joint 110 does not generate a force that would prevent the first and second guide blocks 30, 40 from moving along the first and second linear guide rails 10, 20.

[0056] As a result, the parallel linear guide 1 can absorb distortion caused by fluctuations in all directions of the first guide block 30 and the second guide block 40 by the first elastic member 70, the second elastic member 80, the flexible member 90 and the universal joint 110, allowing the supported object 100 to move more smoothly.

[0057] As described above, according to the parallel linear guide 1 of this embodiment, even if there is variation in the parallel accuracy between the first linear guide rail 10 and the second linear guide rail, this can be tolerated. Therefore, it is possible to build a device having a structure with multiple guide rails 11, 12, 21, 22 that requires even stricter parallel accuracy. Therefore, the weight of the supported object 100 and the weight of the weight that can be placed on the supported object 100 can be increased. This also has the advantage of expanding the range of application of the parallel linear guide 1.

[0058] [Other embodiments] Although the embodiments of the present invention have been described above, the above-mentioned embodiments merely illustrate some of the application examples of the present invention, and are not intended to limit the technical scope of the present invention to the specific configurations of the above-mentioned embodiments.

[0059] In this embodiment, the first linear guide rail 10 has been described as having two guide rails 11, 12, but is not limited to two. There may be one, or two or more. The same applies to the second linear guide rail 20. The number of guide rails included in the first linear guide rail 10 and the number of guide rails included in the second linear guide rail 20 may be different.

[0060] The supported object 100 may have a shape other than a plate. For example, the supported object 100 may be a rectangular parallelepiped or cubic structure having a thickness in the vertical direction, and the supported object may constitute a weight (heavy object). In such a case, the first elastic member and the second elastic member may be directly attached to the weight.

[0061] The number of guide blocks 31, 32, 33, 34 constituting the first guide block 30 is not limited to four as exemplified in this embodiment. The number of guide blocks constituting the first guide block 30 and the second guide block 40 may be different between the two.

[0062] In this embodiment, as a method for physically fastening the members to each other, in addition to fastening with bolts and screws, rivets, welding, etc. can be applied depending on the material and composition used in the fastening parts. In this embodiment, the number of bolts and screws in the fastening parts is not limited to those exemplified in the embodiment.

[0063] In this embodiment, it has been described that the universal joint 110 connecting the second base 60 and the supported object 100 includes the link portion 113, the first joint portion 111, and the second joint portion 112, each of which has a spherical seat at the connecting portion, but the mechanism connecting the second base 60 and the supported object 100 is not limited to this structure. Instead of a configuration consisting of a link portion and a joint portion connected by a spherical seat, the second base 60 and the supported object 100 may be fixed to each other by, for example, a rod-shaped member that can be elastically deformed. [Explanation of symbols]

[0064] 1 Parallel Linear Guide 100 Supported object 10 First linear guide rail 20 Second linear guide rail 11,12 Guide rail 13 Rail base 21,22 Guide rail 23 Rail base 30 First guide block 31, 32, 33, 34 Guide block 40 Second guide block 41, 42, 43, 44 Guide block 50 First Foundation 60 The Second Foundation 70 First elastic member 80 Second elastic member 90 Flexible member 110 Universal joint 111 First joint 112 Second joint part 113 Link section

Claims

1. A parallel linear guide capable of moving a supported object in a predetermined direction while supporting the supported object from below, First and second linear guide rails that extend linearly in a first direction and are arranged parallel to each other in a second direction perpendicular to the first direction; a first guide block and a second guide block attached to the first linear guide rail, respectively, and movable along the linear guide rail; a first base and a second base are fixed to upper surfaces of the first and second guide blocks, respectively; a first elastic member sandwiched between an upper surface of the first base and a lower surface of the supported object, and a second elastic member sandwiched between an upper surface of the second base and a lower surface of the supported object; a plate-shaped flexible member that is located between the first and second linear guide rails that are arranged in parallel and that allows the first base to move in the up-down direction; An end portion of the flexible member on the first base side in the second direction is fixed to an end portion of the first base, and an end portion of the flexible member on the second base side in the second direction is fixed to a lower surface of the supported body. Parallel linear guide.

2. 2. The parallel linear guide according to claim 1, The first and second elastic members are flat rubber members, the first elastic member abuts against an upper surface of the first base and a lower surface of the supported body, The second elastic member abuts against an upper surface of the second base and a lower surface of the supported body. Parallel linear guide.

3. 2. The parallel linear guide according to claim 1, The flexible member is a laminate of a plurality of flat plates stacked in the vertical direction. Parallel linear guide.

4. 4. The parallel linear guide according to claim 1, Further comprising a universal joint connecting the second base and the supported body, The universal joint is a first joint portion fixed to an end portion of the second base in the first direction; A second joint portion fixed to a lower surface of the supported body; a link portion that extends linearly in the first direction and is connected to the first joint portion and the second joint portion. Parallel linear guide.

5. 2. The parallel linear guide according to claim 1, The first and second linear guide rails include a plurality of guide rails extending in the first direction and arranged parallel to the second direction, The first and second guide blocks include guide blocks provided on the plurality of guide rails, the first base is fixed onto a plurality of the guide blocks constituting the first guide block, and the second base is fixed onto a plurality of the guide blocks constituting the second guide block. Parallel linear guide.

6. 2. The parallel linear guide according to claim 1, The first and second guide blocks include a plurality of guide blocks arranged in parallel in an extension direction of the first and second linear guide rails, the first base is fixed on the plurality of guide blocks constituting the first guide block, and the second base is fixed on the plurality of guide blocks constituting the second guide block; Parallel linear guide.

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