JP4240708B2 - Transport equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a transport facility used for supporting and transporting various things.
[0002]
[Prior art]
Conventionally, as this type of transportation equipment, for example, a configuration disclosed in Japanese Patent Application Laid-Open No. 10-1111719 is provided. This conventional configuration is provided with a carriage supported and guided by a main track and a branch track, and each track is composed of a bottom wall, left and right side walls, and an upper wall, and is arranged in the longitudinal direction at the center in the width direction of the upper wall. It is formed with a slit along it. At least at the branch point, a guide along the main track and a guide along the branch track are provided, and the transport carriage has a guide member that follows the guide and this guide member as one of the guides. And a sorting mechanism for sorting.
[0003]
Here, as a guide, a guide rail made of a magnetic material along the main track and a guide rail made of a magnetic material along the branch track are provided, and a magnet roller is provided as a guide member. It is configured to turn to the left and right guide rails via an arm or the like.
[0004]
[Problems to be solved by the invention]
However, in the conventional type, magnetic guide rails must be separately laid on the main track and the branch track, which is troublesome in production, assembly work, and the like. Also, the main track and the branch track accumulate dust on the bottom wall and cannot be easily cleaned, and therefore cannot be easily used in clean rooms where clean air is blown down.
[0005]
Therefore, the invention according to claim 1 of the present invention can be configured such that a fixed route or a branch route is formed by the rail device, but it is not necessary to install and construct another member for branching on the rail device side at the branch portion. In addition, the rail device is intended to provide a transport facility that can make it difficult to collect dust and the like.
[0006]
[Means for Solving the Problems]
  In order to achieve the above-described object, the transportation facility according to claim 1 is a transportation facility comprising a rail device and a movable body supported and guided by the rail device and movable on a fixed path. The rail device comprises a pair of left and right rail bodies, each of which has an upward wheel support surface, an outward branch guide surface, and an inward roller guide surface. One guide surfaceRoller guide surfaceIs on the top and the otherRoller guide surfaceIs formed so that the phase is shifted up and down so thatRoller guide surfaceLower half ofInIs the outward stepButIn the branch portion to the branch path formed and branched with respect to the fixed path, one rail body is continuously formed by the rail body on the branch path direction side of the pair of left and right rail bodies, and the moving body Are engaged with a wheel guided by the wheel support surface, a side guide roller guided by the roller guide surface, and a branch guide surface of the rail body which is continuous in the branch path direction side at the branch portion. A branching roller is provided, and the side guide rollers are provided as a pair of upper and lower corresponding to both roller guide surfaces, and are provided freely and freely concentrically on the movable body side via a common longitudinal axis.The pair of upper and lower side guide rollers has a larger diameter with respect to the upper side guide roller guided by one roller guide surface, with the lower side guide roller guided by the other roller guide surface having a larger diameter. Provided differentlyIt is characterized by being.
[0007]
Therefore, according to the first aspect of the present invention, the moving body is moved by supporting and rolling the wheel group on the wheel support surface and guiding the side guide roller to the roller guide surface, thereby guiding the rail device. Yes. In this case, the rail device can form a gap over the entire length by the pair of left and right rail bodies, and the flow of air is not hindered by the vertically penetrating portion formed by the gap.
[0008]
When the moving body moves along a fixed path, the branch roller is engaged with the branch guide surface on the rail body on the side opposite to the branch path, and the branch roller is moved from the branch guide surface on the rail body on the branch path side. By separating, it can be performed stably without entering the branch path.
Shortly before the moving body reaches the branching portion in the target branching path, the branching roller is engaged with the branching guide surface in the railing body on the branching path side, and the branching in the railing body on the side opposite to the branching path is performed. Remove the branch roller from the guide surface. As a result, the moving body can travel by guiding the branching roller to the branching guide surface on the branching path side, so that it can branch and move to the branching path after reaching the branching part.
[0009]
  In the bifurcation, one wheel that was rolling on the wheel support surface of the rail body will roll on the wheel support surface beyond the gap between the rail bodies, and therefore the wheel falls into the gap, When a moment occurs around the wheel on the other wheel support surface due to its own weight, and the moving body tries to tilt,Small diameterThe side guide roller is guided by the upper roller guide surface, and the lowerLarge diameterBy guiding the side guide roller with the lower roller guide surface, it is possible to receive the moment on the moving body side, so that the side guide action can be performed while preventing the inclination of the moving body, so that the wheel falls into the gap Without going through the gap.At this time, since the side guide rollers have different diameters in the upper and lower directions, it is not necessary to offset the side guide rollers for mounting, and the mounting structure is simplified.
[0012]
  Furthermore, the present inventionClaim 2The transfer equipment described is the above-mentioned claim.1In the mounting configuration, the pair of left and right rail bodies have a C-shaped cross section, and their open portions are arranged to face each other, the upper wheel support surface is formed by the upper surface, and the suspension from the upper inner end An outward branch guide surface is formed by the portion, and an inward roller guide surface is formed by the lower inner surface.
[0013]
  ThereforeClaim 2According to the invention, the pair of left and right rail bodies can be configured in a state having each surface.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an example of an embodiment of the present invention will be described with reference to FIGS.
The rail device 10 is composed of a pair of left and right rail bodies 11, 12, which have a C-shaped cross section and are arranged in line symmetry so that their open portions are opposed to each other.
[0015]
That is, the rail bodies 11 and 12 include a horizontal ceiling portion 11A and 12A, upper hanging portions 11B and 12B that are perpendicular to the inner ends of the ceiling portions 11A and 12A, and the ceiling portion 11A. , 12A, side portions 11C, 12C, which are connected at a right angle from the outer end, and intermediate portions 11D, 12D, which are connected at a right angle from the lower ends of the side portions 11C, 12C, Lower hanging parts 11E, 12E provided perpendicularly downward from the inner ends of the parts 11D, 12D, and bottom parts 11F, 12F provided perpendicularly outward from the lower parts of the lower hanging parts 11E, 12E, etc. And inwardly open portions 11G, 12G are formed between the upper hanging portions 11B, 12B and the intermediate portions 11D, 12D.
[0016]
In the rail bodies 11 and 12 having such a structure, upward wheel support surfaces 11H and 12H are formed by the upper surfaces (upper surfaces) of the top portions 11A and 12A, and the side portions 11C and 12C in the upper hanging portions 11B and 12B are formed. Outward branch guide surfaces 11I and 12I are formed by the surfaces facing the 12C side, and inward roller guide surfaces 11J and 12J are formed by the surfaces facing the inner sides of the lower hanging portions 11E and 12E. At that time, the inward roller guide surfaces 11J and 12J are formed so as to be shifted in phase up and down so that one 11J is on the upper side and the other 12J is on the lower side. The half portion is an outward stepped portion 11K.
[0017]
Both rail bodies 11 and 12 are supported on the ceiling beam 2 side via a plurality of rail yokes 1 at predetermined intervals. That is, the rail yoke 1 is integrally formed in a gate shape in a front view in a state having an upper plate portion 1A and side plate portions 1B suspended from near both ends of the upper plate portion 1A. The rail yoke 1 is supported through a connecting tool (bolts, nuts, etc.) 3 acting on both ends of the upper plate portion 1A so that the height position can be changed and the posture can be adjusted with respect to the ceiling beam 2 side. Yes. Then, the side portions 11C and 12C of the rail bodies 11 and 12 are applied to the lower inner surface side of the side plate portion 1B and are connected by the connecting tool 4. Thereby, both rail bodies 11 and 12 are arranged in a state where a predetermined gap S is formed.
[0018]
As described above, the rail device 10 including the pair of left and right rail bodies 11 and 12 is basically arranged in an oval endless shape, thereby forming a constant path 50 having an oval endless shape. A branch path 51 is formed that is branched after being branched with respect to the constant path 50. In the branch portion 52 and the junction portion 53 to the branch path 51, one rail body is continuously formed by the rail body 12 on the branch path direction side of the pair of left and right rail bodies 11 and 12.
[0019]
That is, also in the branch path 51, a pair of left and right rail bodies 11a and 12a having the same cross-sectional shape as the rail bodies 11 and 12 are disposed, and the rail apparatus 10a is configured by these rail bodies 11a and 12a. Of these, the rail body 12a on the branch path direction side is curved outward from the portion forming the fixed path 50 and then curved inward, and becomes a straight line facing the station 54, and curved inward. After that, the joining portion 53 is formed to have a portion that curves outward and forms the constant path 50.
[0020]
The other rail body 11a is formed along the rail body 12a, and both ends thereof are cut ends of the rail body 12 forming a constant path 50 parallel to the straight portion of the branch path 51. It is connected. The rail bodies 11a and 12a forming the branch path 51 are configured in a state in which one or a plurality of positions are divided at a linear portion facing the station 54, for example, according to the length of the branch path 51. , And connected.
[0021]
In addition, a short turn path 55 is formed between the parallel straight paths of the oblong endless fixed path 50 at one place or a plurality of places as necessary by the same branching and merging configuration as described above. Has been. In forming the turn path 55, the pair of left and right rail bodies 11 a and 12 a are used in the opposite manner to the case of the branch path 51.
[0022]
In other words, the rail body 11a on the branch path direction side is formed in a state having a part that forms the constant path 50 by being bent inward at the branch part 52 from the part that forms the constant path 50 and then reaching the joining part 53. Yes. The other rail body 12a is formed to be curved along the rail body 11a, and both ends thereof are connected to the cut end portions of the rail body 11 forming the linear constant path 50.
[0023]
A self-propelled body (an example of a moving body) 20 that is supported and guided by the rail device 10 and is movable on a fixed path 50 is provided. The self-propelled body 20 includes a pair of front and rear trolley bodies 22 having wheels 21 supported and guided by the wheel support surfaces 11H and 12H, and a plate-like connecting portion 23 that connects the trolley bodies 22 to each other. The travel drive device 24 is interlocked with one of the wheels 21 and the like.
[0024]
A pair of upper and lower side guide rollers 25 and 26 corresponding to the roller guide surfaces 11J and 12J are concentrically separated from each other on the trolley body 22 of the self-propelled body 20 via a common longitudinal axis 27. It is provided freely. Here, the side guide rollers 25 and 26 are respectively guided to the roller guide surfaces 11J and 12J, and for this reason, the roller guide surfaces 12J with respect to the upper side guide rollers 25 guided by the roller guide surfaces 11J. The lower side guide roller 26 to be guided is provided with a large diameter, that is, with different diameters. Side guide rollers 25 and 26 are provided in a pair of front and rear in each trolley body 22.
[0025]
Further, both trolley bodies 22 are provided with branch rollers 31 and 32 that are engaged with the branch guide surfaces 11I and 12I of the rail bodies 11 and 12 that are continuous in the branch path direction side at least at the branch portion 52. That is, the trolley body 22 is provided with an operating device 29 made of a solenoid or the like, and its operating shaft 30 is in the front-rear direction. Actuators 33 and 34 are connected to the operating shaft 30 in the left-right direction, and the branch rollers 31 and 32 are provided on the free ends of the actuators 33 and 34 via a vertical pin so as to freely rotate. Yes.
[0026]
Accordingly, both the actuating bodies 33 and 34 perform seesaw motion by the forward / reverse operation of the actuating device 29, whereby the branching rollers 31 and 32 are selectively engaged and disengaged with respect to the branching guide surfaces 11I and 12I. Therefore, both the operating bodies 33 and 34 are fixed to the operating shaft 30 side so as to form a relatively predetermined angle.
The self-propelled body 20 is fed by a non-contact power feeding method. For this purpose, the rail bodies 11 (11a) and 12 (12a) are provided with cord lines 13 and 14 below the rail length direction. In addition, a pickup coil 35 is provided in the connecting portion 23 of the self-propelled body 20. In addition, a detector 36 is provided in the connecting portion 23, and a detection target 15 for travel control is provided in a predetermined location such as the fixed route 50.
[0027]
At the connecting portion 23 of the self-propelled body 20, a transported object holding device 40 is provided in a suspended manner. The holding device 40 has a box frame shape that is open on the left and right sides, and its upper surface is connected to the connecting portion 23 via a connecting tool 41. In the holding device 40, a transfer means (an example of a transported object) 42 in the left-right direction is disposed.
The operation in the above embodiment will be described below.
[0028]
In traveling of the self-propelled body 20, the wheels 21 are supported and guided by the wheel support surfaces 11H and 12H and rolled, and the upper side guide roller 25 is guided by the roller guide surface 11J and the lower side guide rollers. 26 is guided to the roller guide surface 12J and is guided to the rail devices 10 and 10a. At that time, power is fed to the self-propelled body 20 side by a non-contact power feeding system via a pickup coil 35 or the like facing the code lines 13 and 14.
[0029]
When the self-propelled body 20 travels along the fixed path 50, for example, as shown by the solid line in FIG. 4 or FIG. 6, the branch roller 31 with respect to the branch guide surface 11I in the rail body 11 on the inner side (left side in front view) Are engaged, and the branching roller 32 is detached from the branching guide surface 12I of the rail body 12 on the outer side (right side in front view).
[0030]
In such traveling on the fixed path 50, the detector 36 is detected by the detector 36 slightly before the self-propelled body 20 reaches the branching section 52 or the joining section 53 of the branch path 51 or the turn path 55. Is detected to determine which direction to proceed, and the branching rollers 31 and 32 on the traveling direction side are operated.
That is, when the determination can be made with the branching roller 31 engaged with the branching guide surface 11I as described above, the operating device 29 does not operate. When the determination is made to engage the branch roller 32 with the branch guide surface 12I, the operating device 29 is operated based on the determination, and the two operating bodies 33 and 34 perform the seesaw motion.
[0031]
By such control, the self-propelled body 20 passes through the sides of the branch path 51 and the turn path 55 without entering the branch path 51 and the turn path 55. Then, the vehicle travels stably on the fixed route 50 without being swung outwardly by the arcuate path portion (loop end) having an oval endless shape.
The self-propelled vehicle 20 traveling on the fixed route 50 is branched and traveled to the branch route 51 in order to stop the target station 54. That is, shortly before the self-propelled body 20 reaches the branch portion 52 in the branch path 51, the detector 36 detects and determines the detected body 15, and based on that, the operating device 29 is operated and both operations are performed. The bodies 33 and 34 perform a seesaw exercise.
[0032]
As a result, as shown by the phantom line in FIG. 4, the branch roller 32 is engaged with the branch guide surface 12 </ b> I in the outer (right side in the front view) rail body 12, and the branch guide in the inner rail body 11. The branching roller 31 is detached from the surface 11I. Therefore, the self-propelled body 20 travels in a state where the branching roller 31 is guided by the branching guide surface 11I.
[0033]
Here, in the branching section 52 to the branching path 51, the rail body 12 a on the branching path direction side curves outward from the part forming the constant path 50 and then curves inward and faces the station 54. Since it is straight, the self-propelled body 20 that has reached the branch portion 52 is branched and traveled to the branch path 51 while its branch roller 31 is guided by the branch guide surface 11I as shown in FIG. , And is stopped opposite the station 54.
[0034]
When the self-propelled body 20 travels on the fixed path 50 in the branching section 52, the wheel 21 that has been rolling on the wheel support surface 12H of the rail body 12 is as shown by the imaginary line A in FIG. Then, it rolls on the wheel support surface 12H of the rail body 12 beyond the gap S. Further, when the branch portion 52 is branched to the branch path 51 side, the wheel 21 that has been rolling on the wheel support surface 11H of the rail body 11 has a gap S as shown in an imaginary line B in FIG. It will roll over the wheel support surface 11H of the rail body 11a beyond.
[0035]
Accordingly, the wheel 21 trying to exceed the gap S falls into the gap S, and a moment is generated around the wheel 21 on the wheel support surface 11H (12H) side due to the weight of the self-propelled body 20, so that the self-propelled body 20 is inclined. And However, at this time, the upper small-diameter side guide roller 25 is guided to the roller guide surface 11J, and the lower large-diameter side guide roller 26 is guided to the roller guide surface 12J. Can be accepted. Thus, the side guide action is performed while preventing the self-propelled body 20 from inclining, so that the wheel 21 passes over the gap S without falling into the gap S. The same applies to the merging portion 53.
[0036]
As described above, the self-propelled body 20 traveling on the fixed route 50 can be branched to the branch route 51 and stopped at the target station 54. Thereby, the articles can be unloaded by the transfer means 42 of the holding device 40. During such work, another self-propelled body 20 can travel on the fixed route 50 regardless of the work of the branch route 51. In addition, the self-propelled body 20 that has finished the intended work at the station 54 can join the fixed path 50 from the joining portion 53.
[0037]
In the turn path 55, the operation modes of the branch rollers 31 and 32 are reversed, but the same action as that of the branch path 51 described above is performed. Thereby, the self-propelled body 20 traveling on the constant route 50 can be branched at the branching portion 52 and traveled along the turn route 55, and can be joined to the constant route 50 at the joining portion 53.
In this way, by making the self-propelled body 20 traveling on the fixed route 50 turn using the turn route 55, the self-propelled member 20 is configured to have a circular arc path portion (loop end) in the fixed route 50. ) Can be traveled without going through, so that a shortcut travel can be performed and the working time can be shortened.
[0038]
Since the rail device 10 (10a) is configured by the pair of left and right rail bodies 11 (11a) and 12 (12a) as in the above-described embodiment, the rail device 10 (10a) has a gap S over its entire length. Therefore, even if it is a clean room where clean air is blown down, it can be suitably employed.
[0039]
In the above-described embodiment, while the self-propelled body 20 is stopped at the station 54 of the branch path 51, another self-propelled body 20 is caused to travel on the fixed path 50. The body 20 may be opposed to the station and stopped in the fixed route 50, and the passing self-propelled body 20 may travel along a branch route so as to bypass the station where the self-propelled body 20 is stopped. .
[0040]
In the above-described embodiment, the rail body 11 (11a) having the stepped portion 11K is arranged on the left side, but this may be arranged on the right side and the left and right are switched.
As in the above-described embodiment, the upper side guide roller 25 is formed with a small diameter and the lower side guide roller 26 is formed with a large diameter, that is, the side guide rollers have different diameters in the vertical direction. Therefore, it is not necessary to mount these side guide rollers with an offset, thereby simplifying the mounting structure.
[0041]
In the above-described embodiment, the self-propelled body 20 in which power feeding is performed by the contactless power feeding method is shown as the moving body, but this may be the self-running body 20 in which power feeding is performed by the contact power feeding method. . Further, it may be a cart type moving body to which a moving force is applied from another driving device such as a driving chain.
In the above-described embodiment, a form in which the holding device 40 is provided in a suspended form on the self-propelled body 20 is shown. This is because the holding device is moved from a cart (moving body) that runs on the floor side, for example. It may be a standing type (floor type).
[0042]
In the above-described embodiment, the branch rollers 31 and 32 are engaged and disengaged based on the detection of the detection object 15 by the detector 36. After passing through the portion 53, the branching rollers 31, 32 may be returned to the initial state (reset) based on the detection of the detected object 15 by the detector 36.
[0043]
In the above-described embodiment, the holding device 40 is provided in a suspended manner on the connecting portion 23 of the self-propelled body 20, and the transfer means 42 in the left-right direction is disposed in the holding device 40. The conveyed product may be a vertical transfer means. Further, it may be of a form in which a receiving stand for simply placing an article is mounted or a form in which an article is directly placed. At that time, the holding device 40 is also used in various shapes.
[0044]
FIGS. 8A to 8F show various embodiments of the present invention. Although the turn path 55 is omitted, the turn path 55 may not be provided, and may be provided at one place or a plurality of places.
FIG. 8A shows a form in which a plurality of branch paths 51 are branched and joined to both linear path portions of the oblong endless fixed path 50.
[0045]
FIG. 8B shows a form in which a plurality of (single) branch paths 51 are branched and merged only in one straight path portion of the oblong endless fixed path 50.
FIG. 8C shows a form in which an end branching path 51a is branched to one linear path part (or both linear path parts) in the oblong endless fixed path 50. Here, the self-propelled body 20 that has reached the end of the branch path 51a is moved to another floor (upper floor, lower floor) by the lifting means (elevator) 58. Note that the end branched branch paths 51a may be provided at a plurality of locations.
[0046]
FIG. 8D shows an endless branch path 51a branched into one straight path portion (or both straight path portions) in the oblong endless constant path 50, and one or a plurality of branch paths 51a are separated from the branch path 51a. The closed branch path 51a is sequentially branched. Note that the end branched branch paths 51a may be provided at a plurality of locations.
FIG. 8E shows a form in which an endless joining path 51b is joined to one linear path part (or both linear path parts) in the elliptical endless fixed path 50. Here, the self-propelled body 20 from another floor (upper floor, lower floor) is moved by the lifting / lowering means (elevator) 58 to the start end of the merging path 51b. Note that the end branched branch paths 51a may be provided at a plurality of locations.
[0047]
FIG. 8 (f) shows a case where one end of the elliptical endless constant path 50 is joined to one end of the straight path portion (or both straight path portions), and a single end of the confluence path 51b is combined. A plurality of end-bound merging paths 51b are sequentially merged. In addition, the end merge path 51b may be provided in a plurality of places.
[0048]
【The invention's effect】
According to the first aspect of the present invention, the moving body is guided to the rail device by rolling and supporting the wheel group on the wheel support surface and guiding the side guide roller to the roller guide surface. Can be performed stably. In that case, the rail device can form a gap over the entire length by the pair of left and right rail bodies, and the vertical flow through portion by this gap does not hinder the flow of air, so in a clean room that blows clean air down. Even if it exists, it can employ | adopt suitably.
[0049]
The movement of the moving body along the fixed path can be stably performed without entering the branch path by engaging the branch roller with the branch guide surface on the rail body on the opposite side of the branch path. . And, shortly before the moving body reaches the branching portion in the target branching path, the branching roller is engaged with the branching guide surface in the railing body on the branching path side, so that the moving body is moved to the branching roller. Can travel while being guided by the branch guide surface on the branch path side, and thus can smoothly and reliably branch to the branch path after reaching the branch section.
[0050]
  At the bifurcation, one wheel that was rolling on the wheel support surface of the rail body rolls on the wheel support surface beyond the gap between the rail bodies, so the wheel falls into the clearance. When a moment occurs around the wheel on the other wheel support surface side due to its own weight,Small diameterThe side guide roller is guided by the upper roller guide surface, and the lowerLarge diameterBy guiding the side guide roller with the lower roller guide surface, the moment on the moving body side can be received, and the side guide action can be performed while preventing the inclination of the moving body, so that the wheel falls into the gap. It is possible to cross the gap stably.
[0051]
  In this way, although the rail device forms a fixed route or a branch route, it is not necessary to install and construct another branching member on the rail device side at the branch portion, and the rail device collects dust and the like. It can be difficult.In addition, since the side guide rollers have different diameters in the upper and lower directions, it is not necessary to install these side guide rollers with an offset, and the mounting structure can be simplified.
[0052]
  furtherOf the present invention described aboveClaim 2According to this, the pair of left and right rail bodies can be suitably configured in a state having each surface.
[Brief description of the drawings]
FIG. 1 shows an embodiment of the present invention and is a perspective view of a branching / merging portion in a transport facility.
FIG. 2 is a partially cutaway plan view of the transfer facility.
FIG. 3 is a partially cutaway side view of the main part of the transfer facility.
FIG. 4 is a longitudinal front view of the transfer facility.
FIG. 5 is a longitudinal front view of a rail device portion in the transport facility.
FIG. 6 is a cross-sectional plan view at the time of non-branching traveling of a branching portion in the transport facility.
FIG. 7 is a cross-sectional plan view at the time of branch travel of the branch portion in the transport facility.
FIG. 8 shows another embodiment of the present invention, and (a) to (f) are schematic plan views showing various embodiments.
[Explanation of symbols]
1 Rail yoke
10 Rail device
10a rail device
11 Rail body
11a rail body
11B Upper droop
11G opening part
11H Wheel support surface
11I Branch guide surface
11J Roller guide surface
11K step
12 Rail body
12a rail body
12B Upper droop
12G opening
12H Wheel support surface
12I Branch guide surface
12J Roller guide surface
13 Cord line
14 Cord line
15 Object to be detected
20 Self-propelled body (moving body)
21 wheels
22 Trolley body
24 Traveling drive device
25 Side guide roller
26 Side guide roller
29 Actuator
31 Branch roller
32 Branching roller
35 Pickup coil
36 Detector
40 Holding device
50 fixed route
51 branch route
51a Branched end route
51b Ended merge path
52 Branch
53 Junction
54 stations
55 turn path
58 Lifting means
S clearance

Claims (2)

A transport facility comprising a rail device and a movable body supported and guided by the rail device and movable on a fixed path, wherein the rail device comprises a pair of left and right rail bodies, and The wheel support surface, the outward branch guide surface, and the inward roller guide surface are formed such that one roller guide surface is higher and the other roller guide surface is lower. to, up and down with being formed by shifting the phase, the lower half of one of the roller guide surface is stepped portion of the outer form, at the branch portion of the branch path which is branched to the constant path, A rail body on one side is continuously formed by a rail body on the branch path direction side of the pair of left and right rail bodies, the moving body includes a wheel supported and guided by the wheel support surface, and a roller guide surface. Guided A side guide roller and a branching roller that is engaged with a branching guide surface of the rail body that is continuous in the branching path direction side at the branching portion are provided, and the side guide rollers are vertically moved corresponding to both roller guide surfaces. a pair, the movable body side to the mounted for free rotation on each other on a concentric through a common vertical axis Rutotomoni pair of upper and lower side guide roller, the side guide roller of the upper guided to one of the roller guide surface On the other hand, the lower side guide roller guided by the other roller guide surface has a large diameter and is provided with a different diameter . The pair of left and right rail bodies has a C-shaped cross section, and the open portions thereof are arranged to face each other, the upper wheel support surface is formed by the upper surface thereof, and the outward facing portion is formed by the hanging portion from the upper inner end. 2. The conveyance facility according to claim 1, wherein a branch guide surface is formed, and an inward roller guide surface is formed by a lower inner surface .

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