Traveling vehicle system, unit cell and lattice track

Abstract

The present invention relates to a traveling car system, a unit cell, and a lattice track, and makes it easy to provide a suspended track. A lattice track (R) has a unit cell (U) corresponding to one mesh of a lattice. The unit cell (U) has two first tracks (R1) extending in parallel with a first direction (D1), two second tracks (R2) extending in parallel with a second direction (D2) different from the first direction (D1), four cross tracks (R3) provided at intervals from the first tracks (R1) and the second tracks (R2) in correspondence with intersections of respective extensions of the two first tracks (R1) in the first direction (D1) and respective extensions of the two second tracks (R2) in the second direction (D2), and a connection portion (C) connecting the four cross tracks (R3) to the first tracks (R1) and the second tracks (R2), respectively. The lattice track (R) is formed by linking a plurality of the unit cells (U), and two of the four cross tracks (R3) are continuous between two unit cells (U) that are linked.

Description

TECHNICAL FIELD

[0001] The present application relates to a traveling car system, a unit cell, and a lattice-shaped track. BACKGROUND

[0002] Conventionally, a traveling car system in which a traveling car travels on a track suspended from a ceiling or the like is known. A traveling car system disclosed in Patent Literature 1 has a plurality of first tracks extending in a first direction, a plurality of second tracks extending in a second direction different from the first direction, and a connection track corresponding to an intersection of the first track and the second track.

[0003] PRIOR ART DOCUMENTS

[0004] PATENT LITERATURE

[0005] Patent Literature: International Publication No. 2020 / 110522 SUMMARY

[0006] PROBLEMS TO BE SOLVED BY THE INVENTION

[0007] In the prior art, each track on which the traveling car travels is divided, and thus when suspended from the ceiling, the installation accuracy of each track can be low, and sometimes complicated work of adjusting the installation position is required. As a result, in the prior art, there is a problem that the suspended track is not easily installed.

[0008] The present application provides a traveling car system, a unit cell, and a lattice-shaped track in which the suspended track is easily installed.

[0009] MEANS FOR SOLVING THE PROBLEMS

[0010] The traveling car system according to the present application includes a suspended lattice-shaped track and a traveling car that travels on the lattice-shaped track, wherein the lattice-shaped track includes a unit cell corresponding to one mesh of a lattice, and the unit cell includes two first tracks extending in parallel with a first direction, two second tracks extending in parallel with a second direction different from the first direction, four intersection tracks provided at intervals from each of the two first tracks and each of the two second tracks corresponding to an intersection of a line extending in the first direction from each of the two first tracks and a line extending in the second direction from each of the two second tracks, and a connection portion connecting each of the four intersection tracks to each of the two first tracks and each of the two second tracks, and the lattice-shaped track is formed by connecting a plurality of the unit cells, and two of the four intersection tracks are continuous between two connected unit cells.

[0011] The unit cell involved in the aspect of the present invention has two first rails extending in parallel with a first direction, two second rails extending in parallel with a second direction different from the first direction, four intersection rails corresponding to intersections of respective extensions of the two first rails in the first direction and respective extensions of the two second rails in the second direction and arranged at intervals from the respective two first rails and the respective two second rails, and connecting portions connecting the four intersection rails to the respective two first rails and the respective two second rails, respectively.

[0012] The lattice-shaped rail involved in the aspect of the present invention is a suspended lattice-shaped rail for a traveling vehicle to travel, and has a unit cell as one mesh of the lattice. The unit cell has two first rails extending in parallel with a first direction, two second rails extending in parallel with a second direction different from the first direction, four intersection rails corresponding to intersections of respective extensions of the two first rails in the first direction and respective extensions of the two second rails in the second direction and arranged at intervals from the respective two first rails and the respective two second rails, and connecting portions connecting the four intersection rails to the respective two first rails and the respective two second rails, respectively. The lattice-shaped rail is formed by linking a plurality of the unit cells, and two of the four intersection rails are continuous between two unit cells linked.

[0013] Effects of the Invention

[0014] The traveling vehicle system, the unit cell, and the lattice-shaped rail according to the aspect of the present invention have the unit cell as one mesh of the lattice of the lattice-shaped rail, and the lattice-shaped rail is formed by linking a plurality of the unit cells. Therefore, compared with the case where each rail is suspended from a ceiling or the like, it is easy to make the shape of the lattice uniform, and thus it is not necessary to adjust the installation position, and it is easy to provide the suspended rail.

[0015] Further, in the traveling vehicle system of the above-described aspect, the grid-shaped tracks can be such that one of the two second tracks between two unit cells connected in the first direction abuts, and one of the two first tracks between two unit cells connected in the second direction abuts. According to this aspect, the unit cells abut with respect to the tracks (not points but lines or surfaces), so the positional relationship between adjacent unit cells is easily determined, and the influence of vibration during traveling of the traveling vehicle can be reduced. Further, in the traveling vehicle system of the above-described aspect, the unit cells can be connected to other unit cells at positions above or below each of the four intersection tracks. According to this aspect, compared to the case where connection is made above or below the first tracks, the second tracks, and the like, a larger number of unit cells can be connected with a smaller number of components, so the positional accuracy between the unit cells is high, the working hours spent on connection can be reduced, and connection can be easily performed. Further, in the traveling vehicle system of the above-described aspect, the traveling vehicle can be provided with traveling wheels and guide wheels, and the unit cells can be provided with guide surfaces that guide the guide wheels on the side surfaces of each of the two first tracks, each of the two second tracks, and each of the four intersection tracks, and the guide surfaces of each of the four intersection tracks can be shaped so as not to abut against the guide wheels when the guide wheels are turned as the traveling vehicle changes the traveling direction. According to this aspect, the impact caused by the guide wheels being guided can be mitigated when the guide wheels are turned, and the positional deviation of the traveling vehicle caused by the impact can be suppressed. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a side view of an example of a traveling vehicle provided in a traveling vehicle system of an embodiment.

[0017] Figure 2 is a perspective view of an example of a traveling vehicle provided in a traveling vehicle system of an embodiment.

[0018] Figure 3 is a perspective view of an example of a grid-shaped track of an embodiment.

[0019] Figure 4 is a perspective view of an example of a grid-shaped track of an embodiment.

[0020] Figure 5 is a perspective view of an example of a unit cell of an embodiment.

[0021] Figure 6 is a view that explains an example of a connection component of an embodiment.

[0022] Figure 7 is a view that explains an example of a connection component of an embodiment.

[0023] Figure 8Fig. 1 is a diagram illustrating an example of a connection member of an embodiment.

[0024] Figure 9 Fig. 1 is a diagram illustrating an example of a connection member of an embodiment.

[0025] Figure 10 Fig. 1 is a diagram illustrating an example of a connection member of an embodiment.

[0026] Figure 11 Fig. 1 is a diagram illustrating an example of a connection member of an embodiment.

[0027] Figure 12 Fig. 1 is a diagram illustrating an example of a connection member of an embodiment.

[0028] Figure 13 Fig. 1 is a diagram illustrating an example of a connection member of an embodiment.

[0029] Figure 14 Fig. 1 is a diagram illustrating an example of a connection member of an embodiment.

[0030] Figure 15 Fig. 1 is a diagram illustrating an example of a connection member of an embodiment.

[0031] Figure 16 Fig. 1 is a diagram illustrating an example of a connection member of an embodiment.

[0032] Figure 17 Fig. 1 is a diagram illustrating an example of a connection member of an embodiment.

[0033] Figure 18 Fig. 1 is a diagram illustrating an example of a connection member of an embodiment.

[0034] Figure 19 Fig. 1 is a diagram illustrating an example of a connection member of an embodiment. DETAILED DESCRIPTION

[0035] Hereinafter, the embodiments will be described with reference to the drawings. The present application is not limited to the following described modes. In the drawings, in order to describe the embodiments, a scale is appropriately changed to express, for example, a part is enlarged, reduced, or emphasized, or the like. Further, in the drawings, a direction in the drawing is sometimes described using an XYZ orthogonal coordinate system. In the XYZ orthogonal coordinate system, a horizontal direction is set as an X direction, a Y direction, and a vertical direction is set as a Z direction. The X direction, the Y direction, and the Z direction are described as a + direction in a direction indicated by an arrow in the drawing, and a - direction opposite to the direction indicated by the arrow, respectively. Further, a direction of rotation around a vertical axis or around a Z axis is sometimes denoted as a θZ direction.

[0036] Figure 1 is a side view showing an example of a vehicle provided in a vehicle system of the embodiment. Figure 2 is a perspective view showing an example of a vehicle provided in a vehicle system of the embodiment. Figure 3 and Figure 4 is a perspective view showing an example of a lattice-shaped track of the embodiment. Figure 5 is a perspective view showing an example of a unit cell of the embodiment. In Figure 3 , in order to easily understand the description, an upper side including a suspension member that suspends the lattice-shaped track, a connection portion that connects the lattice-shaped tracks, and the like, and a lower side including the lattice-shaped track are shown, and a portion where the upper side and the lower side overlap is shown by a broken line. The vehicle 100 travels along a track R of a vehicle system SYS, and transports an article M such as a FOUP (Front Opening Unified Pod) that houses a semiconductor wafer or an intermediate mask cassette that houses an intermediate mask.

[0037] The vehicle system SYS is, for example, a system that transports an article M by the vehicle 100 in a clean room of a semiconductor manufacturing plant or the like. In the vehicle system SYS, a plurality of vehicles 100 can be used. By transporting the article M by the plurality of vehicles 100, high-density transportation can be performed, and the transportation efficiency of the article M can be improved.

[0038] The track R is one mode of a track. The track R is, for example, a suspended lattice-shaped track (refer to Figure 3 and Figure 4 ) laid on a ceiling or near a ceiling of a building such as a clean room. Hereinafter, the track R is sometimes referred to as a lattice-shaped track R. The lattice-shaped track R has a unit cell U corresponding to one mesh of a lattice (refer to Figure 5). The unit cell U has two first rails R1 extending in parallel with the first direction D1, and two second rails R2 extending in parallel with a second direction D2 different from the first direction D1. Further, the unit cell U has four cross rails R3 corresponding to intersections of the respective two first rails R1 with extensions of the first direction D1 and the respective two second rails R2 with extensions of the second direction D2, and disposed at intervals from the respective two first rails R1 and the respective two second rails R2. Further, the unit cell U has connection portions C connecting the respective four cross rails R3 with the respective two first rails R1 and the respective two second rails R2. The "connection" means connecting the rails to each other within the unit cell U, and the "connection" is completed at a stage where the unit cell U is completed. The lattice-shaped rails R are formed by connection of a plurality of unit cells U, and between the connected two unit cells U, two of the four cross rails R3 are continuous. The "connection" means connecting the completed unit cells U to each other. Further, the "continuity" means that the rails exist in such positional relationship that the running car 100 can pass through. In the present embodiment, the first direction D1 is orthogonal to the second direction D2. That is, the first rail R1 (the extension of the first rail R1 in the first direction D1) and the second rail R2 (the extension of the second rail R2 in the second direction D2) exist in an orthogonal positional relationship. In addition, in the present embodiment, the first direction D1 and the second direction D2 are parallel to the X direction and the Y direction, respectively. Figure 3 and Figure 4 A portion of the lattice-shaped rails R is shown in FIG. 6. The lattice-shaped rails R can be formed continuously in the first direction D1 (X direction) and the second direction D2 (Y direction) from the illustrated configuration.

[0039] The lattice-shaped rails R are such that, between two unit cells U connected in the first direction D1, one of the two second rails R2 abuts. Further, the lattice-shaped rails R are such that, between two unit cells U connected in the second direction D2, one of the two first rails R1 abuts. The unit cells U can be connected to other unit cells U at positions above or below the respective four cross rails R3. A connection member CP is used in connection of the plurality of unit cells U. The plurality of unit cells U and the connection member CP connecting the plurality of unit cells U are suspended by a suspension member H from a ceiling or the like not shown.

[0040] The first rail R1, the second rail R2, and the cross rail R3 each have a running surface R1a, R2a, R3a on which the running wheels 21 of the running vehicle 100 run. A gap D is formed between the first rail R1 and the cross rail R3 and between the second rail R2 and the cross rail R3. The gap D is a portion through which a portion of the running vehicle 100 (for example, the joint portion 30 described later) passes when the running vehicle 100 runs on the first rail R1 while crossing the second rail R2 or runs on the second rail R2 while crossing the first rail R1. Therefore, the gap D is set to a width through which the joint portion 30 can pass. The first rail R1, the second rail R2, and the cross rail R3 are disposed along the same or substantially the same horizontal plane. Thus, the running surfaces R1a, R2a, R3a are arranged on the same or substantially the same horizontal plane.

[0041] The lattice-shaped rails R have a first guide surface G1 and a second guide surface G2. The first guide surface G1 is disposed in each of the two first rails R1 in the unit cell U. Specifically, the first guide surface G1 is disposed in each of the two first rails R1 in the unit cell U on a side surface thereof, and guides the guide roller 41 (guide wheel) described later. The second guide surface G2 is disposed in each of the two second rails R2 in the unit cell U. Specifically, the second guide surface G2 is disposed in each of the two second rails R2 in the unit cell U on a side surface thereof, and guides the guide roller 41.

[0042] The cross rail R3 has a first connection guide surface G3a, a second connection guide surface G3b, and a non-contact surface G3c. Specifically, the first connection guide surface G3a is disposed at the same or substantially the same height and in the same or substantially the same direction as the first guide surface G1, and guides the guide roller 41 described later. That is, the first connection guide surface G3a and the first guide surface G1 are included in the same plane. Similarly, the second connection guide surface G3b is disposed at the same or substantially the same height and in the same or substantially the same direction as the second guide surface G2, and guides the guide roller 41 described later. That is, the second connection guide surface G3b and the second guide surface G2 are included in the same plane. The non-contact surface G3c is formed so as to continue the first connection guide surface G3a and the second connection guide surface G3b. As described later, the non-contact surface G3c is shaped so as not to contact the guide roller 41 when the guide roller 41 is turned as the running vehicle 100 changes the running direction. For example, the non-contact surface G3c is chamfered so as not to contact the guide roller 41. Details of the first connection guide surface G3a, the second connection guide surface G3b, and the non-contact surface G3c of the cross rail R3 will be described later.

[0043] As Figure 1 and Figure 2As shown, the traveling vehicle 100 has a main body portion 10, a traveling portion 20, a connecting portion 30, a guide portion 40, and a control portion 50. The control portion 50 comprehensively controls the actions of each portion of the traveling vehicle 100. Although the control portion 50 is provided to the main body portion 10 as an example, the control portion 50 can also be provided outside the main body portion 10. The main body portion 10 is disposed below (−Z side) the lattice-shaped track R. The main body portion 10 is formed in a rectangular shape, for example, when viewed from above. The main body portion 10 is formed in a size that is housed within a unit cell U corresponding to one mesh of the lattice of the lattice-shaped track R when viewed from above. Thus, in the traveling vehicle system SYS, a space in which the traveling vehicle 100 traveling in a prescribed unit cell U and another traveling vehicle 100 traveling in a unit cell U adjacent to the prescribed unit cell U are staggered can be ensured. The main body portion 10 is provided with an upper portion 17 and a transfer device 18. The upper portion 17 is suspended from the traveling portion 20 via the connecting portion 30. The upper portion 17 is, for example, rectangular when viewed from above, and has four corner portions 10a on an upper surface 17a.

[0044] The main body portion 10 has a traveling wheel 21, the connecting portion 30, a direction conversion mechanism 34, and the guide portion 40 at the four corner portions 10a, respectively. In this configuration, the main body portion 10 can be stably suspended and stably travel by the traveling wheels 21 disposed at the four corner portions 10a of the main body portion 10. Further, the guide portion 40 disposed at the four corner portions 10a of the main body portion 10 can effectively suppress the positional deviation of the main body portion 10 with respect to the first direction D1 or the second direction D2 of the lattice-shaped track R and the positional deviation of the main body portion 10 with respect to the lattice-shaped track R around the vertical axis. Details of the guide portion 40 will be described later.

[0045] The transfer device 18 is disposed below the upper portion 17. The transfer device 18 is rotatable around a rotation axis AX1 in the Z direction (vertical direction). The transfer device 18 has an article holding portion 13 that holds the article M, a lifting drive portion 14 that lifts the article holding portion 13 in the vertical direction, a lateral extension mechanism 11 that moves the lifting drive portion 14 in the horizontal direction, and a rotation portion 12 that holds the lateral extension mechanism 11. The article holding portion 13 suspends and holds the article M by gripping the flange portion Ma of the article M. The article holding portion 13 is, for example, a chuck having a claw portion 13a that can move in the horizontal direction, and holds the article M by making the claw portion 13a enter below the flange portion Ma of the article M and lifting the article holding portion 13. The article holding portion 13 is connected to a suspension member 13b such as a wire or a belt.

[0046] The lifting drive section 14 is, for example, a crane that lowers the article holding section 13 by paying out the suspension member 13b and raises the article holding section 13 by taking up the suspension member 13b. The lifting drive section 14 is controlled by the control section 50 to lower or raise the article holding section 13 at a prescribed speed. In addition, the lifting drive section 14 is controlled by the control section 50 to hold the article holding section 13 at a target height.

[0047] The lateral extension mechanism 11 has, for example, a plurality of movable plates arranged in the Z direction so as to overlap. The movable plates are relatively movable in the Y direction. The lifting drive section 14 is mounted on the lowermost movable plate. The lateral extension mechanism 11 is able to move the movable plates by a not-shown drive device, and the lifting drive section 14 mounted on the lowermost movable plate and the article holding section 13 are able to extend laterally (slide) in a horizontal direction orthogonal to the traveling direction, for example.

[0048] The turning section 12 is provided between the lateral extension mechanism 11 and the upper unit 17. The turning section 12 has a turning member 12a and a turning drive section 12b. The turning member 12a is provided so as to be able to turn in a direction around an axis in the vertical direction. The turning member 12a supports the lateral extension mechanism 11. The turning drive section 12b turns the turning member 12a in a direction around an axis of the rotation axis AX1, for example, using an electric motor or the like. The turning section 12 is able to turn the turning member 12a by a driving force from the turning drive section 12b, and rotate the lateral extension mechanism 11 (the lifting drive section 14 and the article holding section 13) in a direction around an axis of the rotation axis AX1.

[0049] In addition, as shown in Figs. 1 and 2, the lateral extension mechanism 11 is provided with a cover W that surrounds the transfer device 18 and the article M held by the transfer device 18. The cover W is a cylindrical shape with an open lower end, and has a shape in which a portion in which the movable plates of the lateral extension mechanism 11 protrude is cut away. The upper end of the cover W is mounted to the turning member 12a of the turning section 12, and the cover W turns around an axis of the rotation axis AX1 as the turning member 12a turns. Figure 1 Figure 2 In addition, as shown in Figs. 1 and 2, the lateral extension mechanism 11 is provided with a cover W that surrounds the transfer device 18 and the article M held by the transfer device 18. The cover W is a cylindrical shape with an open lower end, and has a shape in which a portion in which the movable plates of the lateral extension mechanism 11 protrude is cut away. The upper end of the cover W is mounted to the turning member 12a of the turning section 12, and the cover W turns around an axis of the rotation axis AX1 as the turning member 12a turns.

[0050] ​The traveling unit 20 has traveling wheels 21 and auxiliary wheels 22. The traveling wheels 21 are respectively arranged at the four corner portions 10a of the upper surface 17a of the upper unit 17 (the main body 10). The traveling wheels 21 are respectively attached to axles 21a provided to the link units 30. The axles 21a are arranged in parallel or substantially in parallel to the XY plane. The traveling wheels 21 are respectively rotationally driven by driving forces of the traveling drive units 33 described later. The traveling wheels 21 respectively roll on the traveling surfaces Rla, R2a, R3a of the first rails Rl, the second rails R2, and the cross rails R3 in the lattice-shaped rails R, and cause the traveling cart 100 to travel. Note that the configuration is not limited to the one in which all the four traveling wheels 21 are rotationally driven by the driving forces of the traveling drive units 33, and a configuration in which a part of the four traveling wheels 21 is rotationally driven can also be employed.

[0051] The traveling wheels 21 are arranged so as to be able to pivot about the pivot axis AX2 in the θZ direction. The traveling wheels 21 are caused to pivot in the θZ direction by the direction conversion mechanisms 34 described later, and as a result, the traveling direction of the traveling cart 100 can be changed. One auxiliary wheel 22 is arranged on the front and the rear of the traveling direction of the traveling wheel 21, respectively. The auxiliary wheels 22 are respectively the same as the traveling wheels 21, and are able to rotate about the axles of the axles 22a arranged in parallel or substantially in parallel to the XY plane. The lower ends of the auxiliary wheels 22 are set to be higher than the lower ends of the traveling wheels 21. Thus, when the traveling wheels 21 travel on the traveling surfaces Rla, R2a, R3a, the auxiliary wheels 22 do not come into contact with the traveling surfaces Rla, R2a, R3a. Furthermore, when the traveling wheels 21 pass through the gaps D, the auxiliary wheels 22 come into contact with the traveling surfaces Rla, R2a, R3a, and the falling of the traveling wheels 21 is suppressed. Note that the configuration is not limited to the one in which two auxiliary wheels 22 are provided for one traveling wheel 21, and for example, one auxiliary wheel 22 can be provided for one traveling wheel 21, or no auxiliary wheel 22 can be provided.

[0052] The link units 30 link the upper unit 17 of the main body 10 and the traveling unit 20. The link units 30 are respectively arranged at the four corner portions 10a of the upper surface 17a of the upper unit 17 (the main body 10). By the link units 30, the main body 10 is arranged in a state of being suspended from the traveling unit 20, at a position lower than the lattice-shaped rails R. The link units 30 have support members 31 and connection members 32. The support members 31 support the rotation axles of the traveling wheels 21 and the rotation axles of the auxiliary wheels 22 so as to be rotatable. The relative positions of the traveling wheels 21 and the auxiliary wheels 22 are maintained by the support members 31. The support members 31 are formed in a plate shape, for example, and are formed so as to have a thickness that allows the gaps D.

[0053] The connecting member 32 extends downward from the support member 31 and is coupled to the upper surface 17a of the upper unit 17, holding the upper unit 17. The connecting member 32 has a transmission mechanism inside that transmits a driving force of a travel drive unit 33 described later to the travel wheels 21. The transmission mechanism can be configured using a chain or a belt, or can be configured using a gear train. The connecting member 32 is configured to be able to pivot about the pivot axis AX2 in the θZ direction. By the connecting member 32 pivoting about the pivot axis AX2, the travel wheels 21 are able to be caused to pivot about the pivot axis AX2 in the θZ direction via the support member 31.

[0054] The travel drive unit 33 and a direction conversion mechanism 34 are provided in the coupling portion 30. The travel drive unit 33 is mounted to the connecting member 32. The travel drive unit 33 is a driving source that drives the travel wheels 21, and for example, uses an electric motor or the like. The four travel wheels 21 are each driven by the travel drive unit 33 to become a drive wheel. The four travel wheels 21 are controlled by the control unit 50 to be the same or substantially the same rotational speed. In addition, in a case where one of the four travel wheels 21 is not used as a drive wheel, the travel drive unit 33 is not mounted to the connecting member 32 corresponding to the travel wheel 21 that is not used as a drive wheel.

[0055] The direction conversion mechanism 34 causes the connecting member 32 of the coupling portion 30 to pivot about the pivot axis AX2, thereby causing the travel wheels 21 to pivot about the pivot axis AX2 in the θZ direction. By causing the travel wheels 21 to pivot in the θZ direction, it is possible to switch from a first state in which the travel direction of the travel cart 100 is set to the first direction D1 to a second state in which the travel direction is set to the second direction D2, or from a second state in which the travel direction is set to the second direction D2 to a first state in which the travel direction is set to the first direction D1.

[0056] The direction conversion mechanism 34 has a driving source 35, a pinion 36, and a rack 37. The driving source 35 is mounted to a side surface of the travel drive unit 33 that is distal from the pivot axis AX2. The driving source 35 uses, for example, an electric motor or the like. The pinion 36 is mounted to a lower surface side of the driving source 35 and is rotationally driven in the θZ direction by a driving force generated by the driving source 35. The pinion 36 is circular in plan view and has a plurality of teeth in the circumferential direction of the outer periphery. The rack 37 is fixed to the upper surface 17a of the upper unit 17. The rack 37 is provided at four corner portions 10a of the upper surface 17a of the upper unit 17 and is configured in a circular arc shape (a sector shape) about the pivot axis AX2 of the travel wheels 21. The rack 37 has a plurality of teeth in the circumferential direction of the outer periphery that engage with the teeth of the pinion 36.

[0057] The pinion 36 and the rack 37 are arranged in a state of engaging with each other. The pinion 36 is rotated in the θZ direction, and thereby the pinion 36 is moved in the circumferential direction centered on the turning axis AX2 in a manner along the outer periphery of the rack 37. By the movement of the pinion 36, the connecting member 32 is turned, and the travel drive 33 and the direction conversion mechanism 34 are turned in the circumferential direction centered on the turning axis AX2 together with the pinion 36.

[0058] By the turning of the direction conversion mechanism 34, the travel wheels 21 and the auxiliary wheels 22 arranged at the four corner portions 10a of the upper surface 17a are respectively turned in the θZ direction in a range of 90 degrees centered on the turning axis AX2. The driving of the direction conversion mechanism 34 is controlled by the control section 50. The control section 50 can instruct in a manner that the rotational actions of the four travel wheels 21 are performed at the same timing, or can instruct in a manner that the rotational actions of the four travel wheels 21 are performed at different timings. By turning the travel wheels 21 and the auxiliary wheels 22, the travel wheels 21 are changed from a state of contacting one of the first rail R1 and the second rail R2 to a state of contacting the other. In other words, the direction of the rotational axis of the travel wheels 21 is changed from a state of becoming one of the first direction D1 and the second direction D2 to a state of becoming the other. Therefore, it is possible to switch between a first state in which the travel direction of the travel vehicle 100 is set to the first direction D1 (X direction) and a second state in which the travel direction is set to the second direction D2 (Y direction).

[0059] Figures 6 to 9 is a drawing illustrating an example of the connecting member of the embodiment. In addition, in the embodiment, the connecting member CP arranged on the upper side (+Z side) is referred to as the connecting member CP1, and the connecting member CP arranged on the lower side (-Z side) is referred to as the connecting member CP2, but is referred to as the connecting member CP in the case where there is no particular distinction. Figure 6 is a drawing of the connecting member CP in which a plurality of unit cells U (lattice-shaped rails R) are connected, as viewed from the side. As shown in Figure 6 The connecting member CP1 is provided in the upper portion of the connection portion C in a manner that a plurality of unit cells U can be connected. Specifically, one connecting member CP1 connects four connection portions C, and thereby four unit cells U can be connected. Further, the connecting member CP2 is provided in the lower portion of the intersecting rail R3 in a manner that a plurality of unit cells U can be connected. Specifically, one connecting member CP2 connects four intersecting rails R3 of mutually different unit cells U, and thereby four unit cells U can be connected. In addition, the suspension member H is penetrated through the central portion of the connecting member CP. Thereby, the lattice-shaped rail R becomes a state of being suspended from a ceiling or the like.

[0060] Figure 7 is a plan view of the connecting member CP1.Figure 8 is a plan view of the link member CP2. Also, in Figure 7 and Figure 8 , the connection portion C of the unit cell U is indicated by a broken line. As Figure 7 indicated, the link member CPI has a hole Hhl for the suspension member H to pass through, a hole Phal for a pin to pass through the connection portion C, and a hole Bhal, Bhbl for a bolt to fix the link member CPI to the connection portion C. Four of the hole Phal, the hole Bhal, and the hole Bhbl are provided in one link member CPI. Further, Figure 7 indicated, the four link members CPI are the same in configuration. Also, the shape and the like of the link member CPI are an example, and can not be formed as illustrated. As Figure 8 indicated, the link member CP2 has a hole Hh2 for the suspension member H to pass through, a hole Pha2 for a pin to pass through the cross rail R3, and a hole Bha2 for a bolt to fix the link member CP2 to the cross rail R3 (further to the connection portion C). Four of the hole Pha2 and the hole Bha2 are provided in one link member CP2. Further, Figure 8 indicated, the four link members CP2 are the same in configuration. Also, the shape and the like of the link member CP2 are an example, and can not be formed as illustrated.

[0061] Figure 9 is a side view indicating an example in which a pin passes through the link member CP. As Figure 9 indicated, the pin Pl that passes through the connection portion C via the link member CPI is fitted to a blind hole Hal (a hole that is not penetrated) formed in the connection portion C. Further, the pin P2 that passes through the rail R (the cross rail R3) via the link member CP2 is fitted to a blind hole Ha2 formed in the rail R. In the link member CPI and the link member CP2, in a case where the pins Pl, P2 are provided at different positions in the up-down direction (Z direction), the unit cell U does not rotate with the pins Pl, P2 as the center, and the center of the link members CPI, CP2 becomes the center of rotation. Further, unlike Figure 9 , for example, the pins Pl, P2 can be provided at the same position in the up-down direction (Z direction) in the link member CPI and the link member CP2. In a case where the pins Pl, P2 are provided at the same position in the up-down direction, the unit cell U can rotate with the pins Pl, P2 as the center. In this way, the positions of the pins Pl, P2 can be arbitrary positions.

[0062] Figure 10 is a diagram indicating an example of the running portion and the link portion of the embodiment. Figure 10 A is a plan view, Figure 10 B is a front view. As Figure 10As shown, the support member 31 of the link portion 30 is provided with a guide portion housing portion 31a. The guide portion 40 suppresses positional deviation of the link portion 30 with respect to the lattice-shaped track R, and further suppresses positional deviation of the main body portion 10 with respect to the lattice-shaped track R. The guide portion 40 is provided to each of the link portions 30 disposed at the four corner portions 10a of the upper surface 17a of the main body portion 10 (see FIG. 2). In a first state in which the traveling wheel 21 travels on the first track Rl, the guide portion 40 moves along the first guide surface Gl and the first connection guide surface G3a. In a second state in which the traveling wheel 21 travels on the second track R2, the guide portion 40 moves along the second guide surface G2 and the second connection guide surface G3b. In a state in which the main body portion 10 is in travel, the guide portion 40 can be in a state of abutting against the first guide surface Gl or the second guide surface G2, or can be in a state of being spaced apart from the first guide surface Gl or the second guide surface G2 by a gap. Figure 1 and Figure 2 In a first state in which the traveling wheel 21 travels on the first track Rl, the guide portion 40 moves along the first guide surface Gl and the first connection guide surface G3a. In a second state in which the traveling wheel 21 travels on the second track R2, the guide portion 40 moves along the second guide surface G2 and the second connection guide surface G3b. In a state in which the main body portion 10 is in travel, the guide portion 40 can be in a state of abutting against the first guide surface Gl or the second guide surface G2, or can be in a state of being spaced apart from the first guide surface Gl or the second guide surface G2 by a gap.

[0063] The guide portion 40 has a guide roller 41 housed in the guide portion housing portion 31a of the support member 31. The guide roller 41 is housed in the guide portion housing portion 31a and disposed in a state in which the end portion on the -X side protrudes from the guide portion housing portion 31a. The guide roller 41 is supported by a roller shaft 41a so as to be rotatable about the Z axis. The roller shaft 41a is fixed inside the guide portion housing portion 31a and disposed in parallel with the Z direction.

[0064] In addition, the roller shaft 41a can be configured to be supported by an elastic member, for example. According to this configuration, the guide roller 41 is supported so as to be movable in the X direction and rotatable, and can absorb the impact of the guide roller 41 coming into contact with the first guide surface Gl and the like by the elastic member. Furthermore, the guide roller 41 is a driven roller that does not have a driving source that rotates the guide roller 41. However, a driving portion that rotates and drives the guide roller 41 in line with the travel direction of the main body portion 10 can be provided.

[0065] The guide roller 41 is disposed at a height position between the axle 21a of the traveling wheel 21 and the main body portion 10. In addition, the first guide surface Gl and the second guide surface G2 are disposed at a height position between the axle 21a of the traveling wheel 21 and the main body portion 10. The guide roller 41 is disposed in the link portion 30 at a position corresponding to the height of the first guide surface Gl and the second guide surface G2. By disposing the guide roller 41 at a height position between the axle 21a of the traveling wheel 21 and the main body portion 10, it is possible to suppress an increase in the up-down direction dimension of the link portion 30 or the traveling portion 20, and prevent a decrease in the space efficiency in the vicinity of the ceiling of a building or the like.

[0066] Since the roller shaft 41a is provided to the link portion 30, when the orientation of the traveling wheel 21 is changed by the direction conversion mechanism 34, that is, when the link portion 30 is turned by the direction conversion mechanism 34, the guide portion 40 (the guide roller 41) turns around the turning axis AX2 along with the turning of the traveling wheel 21. Thus, in the first state in which the traveling wheel 21 travels on the first track Rl, the guide roller 41 becomes in a state of facing the first guide surface Gl and the first connection guide surface G3a. Further, in the second state in which the traveling wheel 21 travels on the second track R2, the guide roller 41 becomes in a state of facing the second guide surface G2 and the second connection guide surface G3b. Thus, since the guide roller 41 is turned using the direction conversion mechanism 34 for switching the traveling state of the traveling wheel 21, it is not necessary to provide other mechanisms for turning the guide roller 41, and it is possible to prevent the constitution of the main body portion 10 from becoming complicated.

[0067] Figure 11 is a plan view showing an example of the positional relationship between the first track, the second track, and the cross track of the embodiment and the guide roller. Figure 12 is a plan view showing an example of the guide portion (the guide roller) when the traveling wheel of the embodiment is turned. In Figure 11 and Figure 12 the description of the guide portion housing portion 31a of the support member 31 is omitted. As shown in Figure 11 and Figure 12 the portion of the guide roller 41 protruding from the guide portion housing portion 31a of the support member 31 can contact the first guide surface Gl which is the side surface of the first track Rl, the second guide surface G2 which is the side surface of the second track R2, and the first connection guide surface G3a and the second connection guide surface G3b which are the side surfaces of the cross track R3. Here, the guide roller 41 does not abut on the non-abutment surface G3c in which a chamfer is implemented, for example, in the cross track R3. The non-abutment surface G3c can be a shape which does not abut on the guide roller 41 when the guide roller 41 moves from the first connection guide surface G3a to the second connection guide surface G3b, and a chamfer to the extent that abutment is not implemented, for example. For example, in Figure 11 and Figure 12 the case in which the non-abutment surface G3c is a chamfer in two stages and the connection of each chamfer is a smooth shape is exemplified.

[0068] As shown in Figure 11As shown, when the main body 10 travels in the first direction D1 (in the first state where the traveling wheel 21 rolls on the first track R1), the guide roller 41 moves along the first guide surface G1 or the first connecting guide surface G3a. In this first state, the portion of the guide roller 41 protruding from the guide portion receiving portion 31a can contact the first guide surface G1 and the first connecting guide surface G3a. Furthermore, the guide roller 41 can rotate when in contact with the first guide surface G1 and the first connecting guide surface G3a, thus reducing the frictional resistance at contact during the travel of the main body 10, suppressing particle generation, and reducing the increase in the load on the traveling drive unit 33.

[0069] Additionally, when in Figure 11 When the main body 10 moves in the second direction D2 as shown, the guide roller 41 contacts the first guide surface G1 or the first connecting guide surface G3a, thereby limiting the positional displacement of the main body 10 in the second direction D2. That is, the main body 10 has a pair of guide rollers 41 in the second direction D2, and the guide rollers 41 abut against the opposing first guide surface G1 or the first connecting guide surface G3a, thus suppressing the positional displacement of the main body 10 in both the +Y and -Y directions. Therefore, during the movement of the main body 10 in the first direction D1, the positional displacement in the second direction D2 can be limited, and when the main body 10 stops on either of the grid-like tracks R, the positional displacement in the second direction D2 can also be limited.

[0070] like Figure 12 As shown, when the main body 10 is traveling in the first direction D1 and then in the second direction D2 (in the second state where the traveling wheel 21 rolls on the second track R2), the direction-changing mechanism 34 causes the traveling wheel 21 to rotate. At this time, the connecting part 30 rotates via the direction-changing mechanism 34, thereby causing the guide roller 41 to rotate around the rotation axis AX2. Specifically, the guide roller 41 moves from the first connecting guide surface G3a to the second connecting guide surface G3b. At this time, the guide roller 41 moves from the first connecting guide surface G3a to the second connecting guide surface G3b without contacting, for example, the non-contact surface G3c with a chamfer.

[0071] like Figure 12As shown, by moving the guide rollers 41 to a state of following along the second connection guide surface G3b, the main body 10 becomes a state in which the main body 10 can travel in the second direction D2 (a second state in which the traveling wheels 21 roll on the second rail R2). In this second state, the portions of the guide rollers 41 that protrude from the guide portion housing portions 31a can contact the second guide surface G2 and the second connection guide surface G3b. In addition, since the guide rollers 41 can rotate when in contact with the second guide surface G2 and the second connection guide surface G3b, the frictional resistance at the time of contact can be reduced during travel of the main body 10, and an increase in the burden on the travel drive portion 33 can be suppressed.

[0072] In addition, when the main body 10 moves in the first direction D1 in the state shown in Figure 12 In the state shown, the main body 10 moves in the first direction D1, and the guide rollers 41 contact the second guide surface G2 or the second connection guide surface G3b, thereby limiting displacement of the main body 10 in the first direction D1. That is, in the main body 10, the pair of guide rollers 41 in the first direction D1 contact the opposing second guide surface G2 or the second connection guide surface G3b, and thus displacement of the main body 10 in the +X direction and the -X direction can be suppressed. Thus, displacement of the main body 10 in the first direction D1 can be suppressed during travel in the second direction D2 of the main body 10, and displacement of the main body 10 in the first direction D1 can also be suppressed when the main body 10 is stopped on any one of the lattice-shaped rails R.

[0073] Figure 13 is a side view showing an example of the positional relationship between the lattice-shaped rail of the embodiment and the guide rollers. As Figure 13 As shown, the interval L1 of the two guide rollers 41 among the four guide rollers 41 that are aligned in the travel direction is set to be different from the interval L2 of the gaps D adjacent in the first direction D1 or the second direction D2. According to this configuration, it is possible to prevent a state in which the two guide rollers 41 aligned in the travel direction are simultaneously positioned in the gaps D. In Figure 13 In the example shown, a case in which the interval L1 of the guide rollers 41 is greater than the interval L2 of the gaps D is shown, but the present embodiment is not limited to this, and the interval L1 of the guide rollers 41 can be less than the interval L2 of the gaps D.

[0074] Next, a case in which the traveling vehicle 100 changes the travel direction in the traveling vehicle system SYS of the embodiment will be described. Figures 14 to 17 is a diagram showing an example of the operation of changing the travel direction of the traveling vehicle of the embodiment from the first direction to the second direction. As Figure 14As shown, when the main body 10 of the traveling vehicle 100, traveling in the first direction D1 (+X or -X direction) on the first track R1, reaches a unit U of the grid track R (the four corner sections 10a reach the position of the cross track R3), the traveling vehicle 100 stops. That is, the control unit 50 stops the drive of the traveling drive unit 33 at the above-mentioned position. At this time, all four traveling wheels 21 are in contact with the cross track R3. In addition, the four guide rollers 41 are respectively arranged at the position along the first connecting guide surface G3a of the cross track R3.

[0075] like Figure 15 As shown, the control unit 50 drives the direction conversion mechanism 34 to rotate the connecting part 30, causing the driving wheels 21 and auxiliary wheels 22 located at the four corner parts 10a to rotate in the θZ direction around the rotation axis AX2. At this time, the driving wheels 21 located diagonally rotate in the same direction. For example, the driving wheel 21 in the upper left and the driving wheel 21 in the lower right of the figure rotate clockwise. On the other hand, the driving wheel 21 in the upper right and the driving wheel 21 in the lower left of the figure rotate counterclockwise. In addition, such rotation can be performed at the same time or at different times. For example, the driving wheels 21 in the upper left and lower right of the figure can be rotated simultaneously first, and then the driving wheels 21 in the upper right and lower left of the figure can be rotated simultaneously.

[0076] When the driving wheel 21 and the auxiliary wheel 22 rotate, the four guide rollers 41 and the connecting part 30 are integrated and rotate around the rotation axis AX2 respectively, without moving in contact with the non-contact surface G3c. In addition, since the rotation of the driving wheel 21 and the guide rollers 41 are performed by a common direction conversion mechanism 34, it is not necessary to provide a separate structure for converting the direction of the guide rollers 41, thus avoiding complicating the structure of the main body 10.

[0077] Figure 16 This is a diagram illustrating an example of a guide roller during rotation in an embodiment. (See diagram for example.) Figure 16 As shown, by rotating the four traveling wheels 21 at the same time, the four guide rollers 41 provided on the connecting part 30 synchronously change their orientation. As a result, the main body 10 is configured such that when the traveling wheels 21 rotate (when turning), the guide rollers 41 do not come into contact with the cross track R3 (non-contact surface G3c). Compared with the case where the guide shape causes them to come into contact, the impact during rotation can be mitigated. In other words, when the main body 10 rotates, the guide rollers 41 do not come into contact with the cross track R3 (non-contact surface G3c). Therefore, compared with the case where the guide shape causes the guide rollers 41 to come into contact with the cross track R3 (non-contact surface G3c), the impact caused by the guide can be mitigated, and positional displacement caused by the impact can be suppressed.

[0078] As shown in Figure 17 Fig. 23, the control section 50 stops the drive of the direction conversion mechanism 34 after each of the traveling wheels 21, etc. is turned by 90 degrees in the θZ direction. By driving the traveling drive section 33 in this state, the traveling vehicle 100 is able to travel in the second direction D2 (+Y direction or -Y direction). In addition, the four guide rollers 41 are disposed at positions along the second connecting guide surface G3b of the cross rail R3. Furthermore, the main body section 10 does not turn even when the traveling wheels 21, etc. are turned. Thus, the orientation of the main body section 10 is not changed regardless of whether the traveling vehicle 100 travels in the first direction D1 or the second direction D2.

[0079] Figure 18 Fig. 24 is a view showing another example of a non-contact surface of the embodiment. As shown in Figure 18 Fig. 24A, the non-contact surface G3c of the cross rail R3 can be implemented with a one-segment chamfer different from the above-described two-segment chamfer. In Figure 18 Fig. 24A, the above-described two-segment chamfer is indicated by a broken line. As in the above-described embodiment, the non-contact surface G3c implemented with the one-segment chamfer does not contact the guide roller 41 at the time of turning. As shown in Figure 18 Fig. 24B, the entire non-contact surface G3c of the cross rail R3 can be formed by a curved surface. At this time, as in the above-described embodiment, the non-contact surface G3c does not contact the guide roller 41 at the time of turning. In Figure 19 Fig. 24B, a continuous surface that contacts the guide roller 41 at the time of turning is indicated by a broken line. The shape of the non-contact surface G3c can be any shape that does not contact the guide roller 41 at the time of turning of the guide roller 41, but since the auxiliary wheels 22 contact the traveling surfaces Rla, R2a, R3a to suppress the drop of the traveling wheels 21, it is preferable to be formed by a chamfer or a curved surface to the extent that the drop of the traveling wheels 21 is suppressed.

[0080] Figure 19 Fig. 25 is a view showing a configuration example of a unit cell of the embodiment. As shown in Figure 19 Figs. 25A to Figure 19 C, the unit cell U (upper portion of the unit cell U, connection portion C) is configured by several members. Each of the members is directly linked to each other by a bolt or the like. For example, as shown in Figure 19 Fig. 25A, the unit cell U (upper portion of the unit cell U, connection portion C) can be configured by a combination of a member including one of the first rails Rl and one cross rail R3, a member including the other of the first rails Rl and one cross rail R3, a member including one of the second rails R2 and one cross rail R3, and a member including the other of the second rails R2 and one cross rail R3. For example, as shown in Figure 19As shown in FIG. 1A, the unit cell U (the upper portion of the unit cell U, the connecting portion C) can be configured by a combination of a member including one of the first rails Rl, a member including the other of the first rails Rl, a member including one of the second rails R2, a member including the other of the second rails R2, and four members including the cross rails R3. For example, as shown in FIG. 1B, the unit cell U (the upper portion of the unit cell U, the connecting portion C) can be configured by a combination of a member including one of the first rails Rl, a member including the other of the first rails Rl, a member including one of the second rails R2 and two of the cross rails R3, and a member including the other of the second rails R2 and two of the cross rails R3. Figure 19 As shown in FIG. 1C, the unit cell U (the upper portion of the unit cell U, the connecting portion C) can be configured by a combination of a member including one of the first rails Rl, a member including the other of the first rails Rl, a member including one of the second rails R2 and two of the cross rails R3, and a member including the other of the second rails R2 and two of the cross rails R3. Figure 19 A ~ ​ C is an example, and the unit cell U can be configured by several members.

[0081] Thus, according to the travel car system SYS of the embodiment, the unit cell U is one mesh of the lattice of the lattice-shaped rail R, and the lattice-shaped rail R is formed by linking a plurality of the unit cells U, so that it is easy to make the shape of the lattice uniform, it is not necessary to adjust the mounting position from the ceiling or the like, and it is easy to provide the suspended rail. Further, the first rails Rl abut on each other and the second rails R2 abut on each other between the two unit cells U adjacent to each other, so that the unit cells U are connected by the rails (not points but lines or surfaces), and thus it is easy to determine the positional relationship between the adjacent unit cells U, and it is possible to reduce the influence on the vibration of the travel car 100 when the travel car 100 travels on the lattice-shaped rail R. Further, the linking members CP that link the other unit cells U are provided at positions above or below the respective four cross rails R3, so that a smaller number of linking members CP link a larger number of unit cells U (four unit cells U), and thus the positional accuracy between the unit cells U is high, it is possible to reduce the working hours spent for linking, and it is easy to perform the linking. Further, since the non-abutment faces G3c, which do not abut on the guide rollers 41 at the time of turning, are included in the guide faces of the respective four cross rails R3, it is possible to moderate the impact caused by the introduction of the guide rollers 41 at the time of turning of the guide rollers 41, and it is possible to suppress the positional displacement of the travel car 100 due to the impact.

[0082] The above describes embodiments of the present application, but the technical scope of the present application is not limited to the above-described embodiments. Various changes or improvements that would be obvious to one skilled in the art can be made to the above-described embodiments. Furthermore, modes in which such changes or improvements are made are also included in the technical scope of the present application. One or more of the components described in the above-described embodiments and the like can be omitted at times. Furthermore, the components described in the above-described embodiments and the like can be appropriately combined. Furthermore, the disclosures of all documents cited in the above-described embodiments and the like are incorporated herein by reference in the extent permitted by law. For example, the shape of the lattice-shaped track R can not be a square (not only a square) but also a rectangle, a parallelogram, or the like. Furthermore, the guide roller 41 can not be included.

[0083] In addition, the technical scope of the present application is not limited to the solutions described in the above-described embodiments and the like. One or more of the components described in the above-described embodiments and the like can be omitted at times. Furthermore, the components described in the above-described embodiments and the like can be appropriately combined. Furthermore, the disclosures of Japanese Patent Application No. 2021-093833 and all documents cited in the above-described embodiments and the like are incorporated herein by reference in the extent permitted by law.

[0084] Explanation of symbols:

[0085] C: connection portion; CP: connecting member; D: gap; D1: first direction; D2: second direction; G1: first guide surface; G2: second guide surface; G3a: first connection guide surface; G3b: second connection guide surface; G3c: non-contact surface; R: lattice-shaped track; R1: first track; R2: second track; R3: cross track; SYS: running car system; U: unit cell; 21: running wheel (running wheel); 41: guide roller (guide wheel); 100: running car.

Claims

1. A traveling vehicle system comprising a suspended lattice-shaped track and a traveling vehicle that travels on the lattice-shaped track, wherein the lattice-shaped track comprises a unit cell corresponding to one mesh of a lattice, the unit cell has two first rails extending in parallel with a first direction, two second rails extending in parallel with a second direction different from the first direction, four intersection rails corresponding to intersections of each of the two first rails with an extension line of the first direction and each of the two second rails with an extension line of the second direction, and disposed at intervals from each of the two first rails and each of the two second rails, and a connection portion connecting each of the four intersection rails to each of the two first rails and each of the two second rails, the lattice-shaped track is formed by connecting a plurality of the unit cells, and two of the four intersection rails are continuous between two unit cells connected to each other.

2. The traveling vehicle system according to claim 1, wherein the unit cell is connectable to another unit cell at a position above or below each of the four intersection rails.

3. The traveling vehicle system according to claim 1, wherein the unit cell is connectable to another unit cell at a position above or below each of the four intersection rails.

4. The traveling vehicle system according to any one of claims 1 to 3, wherein the traveling vehicle comprises traveling wheels and guide wheels, the unit cell comprises a guide surface that guides the guide wheels on a side surface of each of the two first rails, each of the two second rails, and each of the four intersection rails, and the guide surface of each of the four intersection rails is shaped so as not to come into contact with the guide wheels when the guide wheels are rotated as the traveling vehicle changes a traveling direction.

5. A unit cell comprising two first rails extending in parallel with a first direction, two second rails extending in parallel with a second direction different from the first direction, four intersection rails corresponding to intersections of each of the two first rails with an extension line of the first direction and each of the two second rails with an extension line of the second direction, and disposed at intervals from each of the two first rails and each of the two second rails, and a connection portion connecting each of the four intersection rails to each of the two first rails and each of the two second rails, the unit cell corresponds to one mesh of a lattice-shaped track, the lattice-shaped track is formed by connecting a plurality of the unit cells, and one of the two second rails comes into contact with another one of the two second rails between two unit cells connected to each other in the first direction, and one of the two first rails comes into contact with another one of the two first rails between two unit cells connected to each other in the second direction. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 6. A lattice-shaped track for a suspended track for a vehicle, wherein a unit cell is provided as one mesh of the lattice, the unit cell has: two first tracks extending in parallel with a first direction; two second tracks extending in parallel with a second direction different from the first direction; four intersection tracks corresponding to intersections of each of the two first tracks with an extension of the first direction and each of the two second tracks with an extension of the second direction, and disposed at intervals from each of the two first tracks and each of the two second tracks, respectively; and a connection portion connecting each of the four intersection tracks to each of the two first tracks and each of the two second tracks, respectively, the suspended lattice-shaped track is formed by linking a plurality of the unit cells, and two of the four intersection tracks are continuous between two unit cells linked to each other, the lattice-shaped track is such that one of the two second tracks abuts between two unit cells linked in the first direction, and one of the two first tracks abuts between two unit cells linked in the second direction. ​

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