JP4194320B2 - Pallet device for long object conveyance and long object conveyance system - Google Patents

Description

[0001]
[Technical field to which the invention belongs]
The present invention relates to a pallet apparatus for conveying a long object and a long object conveying system that convey a long object using a conveyor, and in particular, can change the conveying direction at high speed and easily.
[0002]
[Prior art]
Conventionally, the conveyance direction of the conveyed product by the conveyor has been changed to an up-down method and a curve conveyor method.
[0003]
The up-down system is a place where two conveyors intersect at right angles, and a transfer unit for moving up and down from the transfer surface is provided in one conveyor, and after the transfer object is stopped at this point, the transfer The transported object is lifted by the unit and redirected to another orthogonal conveyor for transfer.
[0004]
In the curve conveyor system, a conveyed product is placed on a vertically long plate-like pallet, and the arc-shaped corner portion is conveyed in a vertically long state.
[0005]
[Problems to be solved by the invention]
In the up-down type transport method, when the transport direction of the transport object is changed, the transport object must be temporarily stopped, the transport speed is greatly reduced, and another transport unit for up and down the transport object is provided. There is a problem that it is necessary and the equipment cost increases.
[0006]
In the above-mentioned curve conveyor system, it is not necessary to stop the conveyed product when changing the conveyance direction, but a large arc-shaped guide is necessary to move the vertically long plate-shaped pallet in an arc, and the direction change region There is a problem that the facility space becomes large.
[0007]
The present invention has been made in view of the above-described conventional problems, and is capable of changing the direction at high speed when transporting a long object without increasing the equipment space in the direction changing area. An object of the present invention is to provide a pallet apparatus for conveying a long object and a long object conveying system.
[0008]
[Means for Solving the Problems]
The present invention has a pair of pallets in which the lower surface is substantially flat and at least 1/2 of the outer circumference is a continuous curved surface protruding outward, and a support portion provided on the upper surface of these pallets, A connecting bar for supporting the pallet so as to be rotatable about a vertical axis with respect to the pallet at two points separated in the longitudinal direction, thereby connecting the pair of pallets; A long conveyed product can be placed directly on or via the connecting bar, and the support portion is provided on the pallet side with a rotation center axis, and the connection bar side is provided with the rotation center axis. A rotating bush supported by the rotating bush, and a ring-shaped slide plate provided on a connecting plate integral with the rotating bush and slidably contacting the upper surface of the pallet in the rotational direction. The long object conveying pallet apparatus characterized by being configured Nde, is to achieve the above object.
[0009]
In the pallet apparatus for conveying a long object, the pallet may be circular in a plan view.
[0010]
Moreover, in the pallet apparatus for conveying a long object, the support portion may be arranged at a shape center in a plan view of the pallet.
[0012]
Furthermore, in the pallet apparatus for transporting a long object, the rotation center shaft protrudes upward through the bush, and the amount of protrusion is for placing the long transport object or the long transport object. The length may be engageable with one of the jigs from below.
[0013]
The present invention relating to a long object conveying system includes any one of the above-described long object conveying pallet apparatuses, and a conveying apparatus that supports and conveys the long object conveying pallet apparatus from the lower surface of the pallet. And the transport device includes at least a first conveyor and a second conveyor having a transport width larger than a width in a direction perpendicular to the transport direction of the pallet, and the first conveyor with respect to the first conveyor. The two conveyors are arranged so as to intersect from one side surface of the first conveyor, near the intersection of the first conveyor and the second conveyor, from the vicinity of the side surface opposite to the side surface of the first conveyor, A guide surface that is continuous in the vicinity of the side surface on the downstream side of the first conveyor in the two conveyors is provided, and the pallet conveyed on the first conveyor is proposed on the second conveyor along the guide surfaces. The long conveying system for diverting guide is characterized in that provided, is intended to accomplish the above object.
[0014]
Further, in the long person conveyance system, the direction changing guide is arranged on a pallet which is arranged so that the guide surface can be freely projected and retracted on the conveyance surface of the first conveyor and is conveyed on the first conveyor. You may make it drive selectively to the direction change position which contact | abuts and guides in a 2nd conveyor direction, and the direction non-change position which does not guide in a 2nd conveyor direction even if it does not contact or contacts.
[0015]
Furthermore, in the long object conveying system, the direction changing guide is a lever supported so as to be swingable in a horizontal plane by a vertical axis outside the conveying surfaces of the first and second conveyors. The side surface constitutes the guide surface, and the other surface serves as a width direction side end surface on the second conveyor side of the first conveyor at the non-converting position, and constitutes a linear guide surface that closes the second conveyor. You may do it.
[0016]
Moreover, in the said elongate article conveyance system, the rotation direction of the width direction of the said 1st conveyor was provided in the pallet direction change area | region which is an area | region which cross | intersects the conveyance surface of the said 2nd conveyor in the conveyance surface of the said 1st conveyor. A plurality of conveyor rollers may be arranged in parallel in the transport direction, and each conveyor roller may be configured to support a plurality of narrow rollers coaxially, and each of the narrow rollers may be rotatable independently of each other.
[0017]
Further, in the long object conveyance system, each of the pallet in a horizontal plane in an arbitrary direction in the pallet direction changing area which is an area intersecting the conveyance surface of the second conveyor on the conveyance surface of the first conveyor. A plurality of caster rollers that can be conveyed may be two-dimensionally distributed.
[0018]
Furthermore, in the long object conveying system, the direction change guide is fixed, and the pallet direction changing area of approximately ¼ circle extending from the conveying surface of the first conveyor to the conveying surface of the second conveyor, A plurality of conveyor rollers having a rotation axis in the width direction of the first conveyor are arranged in parallel in the transport direction, and each conveyor roller supports a plurality of narrow rollers coaxially, and each of the narrow rollers is independent of each other. It may be rotatable.
[0019]
Further, in the long object conveying system, each of the direction change guides is fixed, and each of the fan-shaped pallet direction changing areas of approximately 1/4 circle extending from the conveying surface of the first conveyor to the conveying surface of the second conveyor A plurality of caster rollers capable of conveying the pallet in any direction within a horizontal plane may be arranged in a two-dimensional manner.
[0020]
Further, another invention of the long object transport system includes any one of the above-described long object transport pallet apparatuses, and a transport apparatus that supports and transports the long object transport pallet apparatus from the lower surface of the pallet. The conveying device includes at least a first conveyor and a second conveyor having a conveying width larger than a width in a direction orthogonal to the conveying direction of the pallet, and the first and second conveyors are The first conveyor is configured so as to be connected to the linear conveyor surface of the second conveyor from the side, and the first conveyor is conveyed on the first conveyor. The above object is achieved by a long object conveying system characterized in that the coming pallet is transferred onto a second conveyor.
[0021]
Further, in the above-described long object transport system, the pallet to be redirected from the first conveyor to the second conveyor is guided to the direction change inner corner at the intersection of the first conveyor and the second conveyor. You may provide the circular rotation guide provided with the at least 1/4 convex circular arc-shaped guide surface.
[0022]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below in detail with reference to the drawings.
[0023]
As shown in FIG. 1 and FIG. 2, a pallet device 10 for conveying an elongated object according to an example of an embodiment of the present invention is a pair of circular pallets 12 and 14 and a rod-like member in plan view, Almost both ends of the pallet 12 and 14 are configured to include a connecting bar 16 that is engaged with the pallets 12 and 14 so as to be rotatable about a vertical axis.
[0024]
At both ends of the rod-shaped connecting bar 16, circular connecting plates 18 and 18 having a smaller diameter than the pallets 12 and 14 are integrally connected, and a rotating bush provided at a circular center position of each connecting plate 18. 20 and the rotation center shaft 22 provided on the pallets 12 and 14 side constitute a support portion 24, and the support portion 24 allows the pallets 12 and 14 to be coaxial with the connection plates 18 at both ends of the connection bar 16. And rotatably supported around the rotation center shaft 22.
[0025]
Between the connecting plate 18 and the pallets 12, 14, a ring-shaped slide plate 26 having substantially the same outer diameter as the circular connecting plate 18 is provided, and the pallet 12, 14 is slidably contacted in the rotational direction.
[0026]
Here, a part of the slide plate 26 in the thickness direction is fitted from above into a circular recess 28 formed on the upper surface of the pallets 12 and 14 coaxially with the rotation center axis. It is designed to be positioned.
[0027]
Reference numeral 29 in FIG. 3 denotes a screw for fixing the rotation center shaft 22 to the center of the pallets 12 and 14.
[0028]
A long object conveyance system 30 according to an example of an embodiment of the present invention includes a plurality of long object conveyance pallet apparatuses 10 and a conveyance path formed by connecting a plurality of roller conveyors. It consists of and.
[0029]
FIG. 4 shows a case where the long object transport system 30 is applied to processing or measuring a long object.
[0030]
The long object conveying system 30 is arranged in the left-right direction on the lower side in FIG. 4 and linearly arranged from left to right in the figure, and conveys the long object conveying pallet device 10 in the same direction. A first roller conveyor 32 and a second roller conveyor 34 provided orthogonal to the first roller conveyor 32 from above in FIG. 4 and linearly arranged from below to above in FIG. A third roller conveyor 36 disposed on the exit side of the second roller conveyor 34, orthogonal to the second roller conveyor 34, and linearly arranged from right to left in FIG. 4, and the third roller A fourth roller conveyor 38 disposed from the end of the conveyor 36 to the start of the first roller conveyor 32 is provided as a main component.
[0031]
The middle portion of the second roller conveyor 34 passes through a work area 35 for processing and measurement.
[0032]
Each of the first to fourth roller conveyors 32 to 38 has a conveyance surface width (conveyance width) larger than the outer diameter of the pallets 12 and 14, and the pallets 12 and 14 are used as conveyance surfaces. This can be conveyed in the rotational direction of the conveyor roller in the state of being placed.
[0033]
At the intersection of the first roller conveyor 32 and the second roller conveyor 34, a direction changing guide 40 is disposed as shown in FIG.
[0034]
As shown in an enlarged view in FIG. 5, the direction changing guide 40 is a lever that is supported so as to be swingable in a horizontal plane by a vertical shaft 41 outside the conveying surfaces of the first and second roller conveyors 32 and 34. One side surface of the lever in the horizontal direction, that is, the upstream side surface of the first roller conveyor constitutes a substantially concave arcuate guide surface 40A, and the other surface is a linear side end surface, which is a linear guide surface 40B. Is configured.
[0035]
The direction changing guide 40 can be swung within a certain range around the vertical axis 41 by an air cylinder 42, and when swung counterclockwise as shown by a solid line in FIG. The guide surface 40A enters the conveyance surface of the first roller conveyor 32, and a direction changing position is adopted in which the guide surface 40A comes into contact with the pallets 12 and 14 conveyed on the first roller conveyor 32 and guides in the direction of the second roller conveyor. Has been.
[0036]
Further, when the direction changing guide 40 is swung clockwise in FIG. 5, the linear guide surface 40B constitutes one side end surface of the first roller conveyor 32 as shown by a two-dot chain line. In addition, the second roller conveyor 34 is closed to a direction invariable position.
[0037]
Accordingly, when the direction change guide 40 is driven in the clockwise direction in FIG. 5, the pallets 12 and 14 conveyed on the first roller conveyor 32 are changed in the direction of the second roller conveyor 34. Without being conveyed, the first roller conveyor 32 is conveyed linearly as it is. When the direction change guide 40 is swung counterclockwise as shown by a solid line in FIG. 5, the pallets 12 and 14 conveyed on the first roller conveyor 32 are guided by the guide surface 40A of the direction change guide 40. Is brought into contact with the transfer surface of the second roller conveyor 34.
[0038]
In addition, when the pallets 12 and 14 change direction along the guide surface 40A of the direction change guide 40, the first roller conveyor 32 has an angle in the direction of action of the conveying force with respect to the movement direction of the pallets 12 and 14. As it gradually increases, the conveying force decreases significantly.
[0039]
However, when the pallet 12 on the front end side in the transport direction changes direction, a transport force is applied from the first roller conveyor 32 to the pallet 14 on the rear end side in the transport direction. Since the pallet 12 is transmitted to the side pallet 12, the pallet 12 is pushed along the guide surface 40 </ b> A and smoothly moves onto the second roller conveyor 34.
[0040]
Further, when the pallet 14 on the rear side in the transport direction changes direction, a transport force from the second roller conveyor 34 is applied to the pallet 12 on the front side in the transport direction that has already been transferred onto the second roller conveyor 34. Therefore, the pallet 14 is pulled along the guide surface 40A and moves onto the second roller conveyor 34 without any delay.
[0041]
Reference numeral 44 in FIG. 5 denotes a circular rotating guide, which is arranged at the corner portion of the direction change inner side (inner side of the curve) at the intersection of the first roller conveyor 32 and the second roller conveyor 34, and the pallets 12 and 14 along the guide surface 40A. When the direction is changed, the direction change inner surfaces of the pallets 12 and 14 are brought into contact with each other.
[0042]
The circular rotation guide may be rotatable or fixed. In the case of the fixed type, it is sufficient if it has at least a 1/4 convex arc-shaped guide surface along the direction change inner (curve inner) corner at the intersection. However, in the case of circular and rotatable, there is an advantage that there is little friction with the pallets 12 and 14.
[0043]
Here, as shown in FIG. 2, the pallets 12 and 14 have a larger diameter than the connecting plate 18 and the slide plate 26, so that the outer peripheral ends protrude therefrom. As shown in FIG. 5, the direction changing guide 40 and the circular rotation guide 44 have a stepped shape, and an upper wide portion 40 </ b> C in the direction changing guide 40 and an upper large diameter portion 44 </ b> B in the circular rotation guide 44. The pallets 12 and 14 overlap with a part of the outer periphery of the pallets 12 and 14 whose direction is changed so that the pallets 12 and 14 do not protrude upward when the direction is changed. The small diameter portion 44A has a diameter that is slightly separated from the outer periphery of the pallets 12 and 14 when the direction is changed.
[0044]
In addition, as indicated by reference numeral 45 in FIG. 1, a concave arc-shaped outer fixed guide is provided on the outlet side of the second roller conveyor 34 in a pair with the circular rotation guide 44, so that the circular rotation In cooperation with the guide 44, the pallets 12 and 14 are smoothly guided. Note that the outer fixed guide 45 is not necessarily provided.
[0045]
Reference numeral 48 denotes a width direction side end guide for maintaining the conveyed products on the first and second roller conveyors 32 and 34 within the conveying surface. With respect to the inner side surface (guide surface) of the width direction side end guide 48, the width direction side end surface 40B of the direction change guide 40 and the width direction side end guide 48 are in the same width direction of the transport surface at the direction inversion position. To be in position. The width direction side end guide 48 is also stepped, and a part of the outer periphery of the pallets 12 and 14 enters the lower side of the upper wide portion.
[0046]
The direction change guide 40 as described above is not provided at the intersection of the outlet side of the second roller conveyor 34 and the third roller conveyor 36.
[0047]
This is because when the pallets 12 and 14 are conveyed on the first roller conveyor 32 and pushed out from the outlet, the third roller conveyor 36 conveys smoothly on the third roller conveyor 36 without using a direction change guide. It is because it is transferred to.
[0048]
However, the circular rotation guide 44 similar to the above is disposed at the inner corner of the direction change so that the pallets 12 and 14 do not collide with the inner corner of the direction change.
[0049]
Fixed type direction change guides 50 are respectively provided at the conveyance direction outlet of the third roller conveyor 36 and the conveyance direction outlet of the fourth roller conveyor 38. As shown in an enlarged view in FIG. 6, the fixed-type direction changing guide 50 is arranged so that the pallets 12 and 14 turn in a circular arc shape from the upstream roller conveyor to the downstream roller conveyor. It is formed on a circular arc outside the direction change (outside the curve).
[0050]
Therefore, the pallets 12 and 14 conveyed by the upstream roller conveyor do not go straight at the place where the fixed type direction change guide 50 is provided.
[0051]
Also in the case of this fixed-type direction change guide 50, the same circular rotation guide 44 as described above is provided at the direction change inner corner portion facing this.
[0052]
When a long object is conveyed on a processing or measurement line by the long object conveyance system 30 as described above, a long conveyance object placing jig 52 is used as shown in FIG.
[0053]
The jig 52 for placing a long transported object includes a pair of front and rear circular support plates 54 having substantially the same diameter as the connecting plate 18 provided on the upper side of the pallets 12 and 14, A bush 55 that can be fitted to the rotation center shaft 22 of the support portion 24 from above is provided.
[0054]
On the pair of support plates 54, a transport object receiving portion 56 having a concave section is attached, and the transport object receiving portion 56 is connected in the front-rear direction by a connection stay 58, whereby the pair of support plates The distance between 54 is made to coincide with the distance between the pallets 12 and 14.
[0055]
Reference numeral 60 in FIG. 3 denotes a positioning pin. When the long transported article mounting jig 52 is moved up and down by a lifter (not shown), the upper limit position and the lower limit position are set by contacting a sensor (not shown). It has come to be decided.
[0056]
In actual conveyance, the control device 62 shown in FIG. 7 selectively drives the direction changing guide 40 to the direction changing position or the direction non-changing position, or controls the lifter (not shown) to make it long. The conveyed product mounting jig 52 is moved up and down.
[0057]
Accordingly, the pallet apparatus 10 for conveying a long object moves straight on the first roller conveyor 32 or is transferred in the direction of the second roller conveyor 34 depending on the swing position of the direction changing guide 40.
[0058]
Conventionally, the transfer speed has been greatly reduced by stopping the transfer at the time of transfer to a different conveyor, or by lifting and transferring by a lifter. In the system 30, the pallet apparatus 10 for transporting long objects can be smoothly transferred to the next conveyor at a considerably high speed without reducing the transport speed.
[0059]
In the long object conveying system 30, the pallet direction changing area from the first roller conveyor 32 to the second roller conveyor 34 uses the conveyor rollers that constitute a normal roller conveyor as it is. A conveyor roller or a caster roller as shown in FIG. 8 or FIG. 9 may be used. In FIGS. 8 and 9, the direction changing guide 40 or 50 is not shown.
[0060]
In the case of FIG. 8, each conveyor roller 66 in the direction changing region 64 where the pallets 12 and 14 are changed from the first roller conveyor 32 to the second roller conveyor 34 is coaxially supported by a plurality of narrow rollers 66A. And each of the narrow rollers 66A can be rotated independently of each other.
[0061]
In this way, when the pallets 12 and 14 change direction from the first roller conveyor 32 to the second roller conveyor 34 in the direction change region 64, the difference in moving speed between the inside and outside of the direction change curve is calculated. As compared with the case where one conveyor roller is used, the friction between the pallets 12 and 14 and the conveyor roller 66 can be reduced.
[0062]
In the case shown in FIG. 9, a plurality of caster rollers 68 each capable of transporting the pallets 12 and 14 in an arbitrary direction within a horizontal plane are two-dimensionally arranged in the direction changing region 64. It is.
[0063]
In this case, the direction change area can be easily configured at low cost. Further, the friction between the pallets 12 and 14 and the caster roller 68 is smaller than that of the conveyor roller 66 using the narrow roller 66A.
[0064]
The direction changing area 64 where the conveyor roller 66 or the caster roller 68 is provided is a rectangular area where two roller conveyors intersect when the direction changing guide 40 is provided, and the fixed direction changing guide 50 is used. Becomes a sector shape (1/4 circle) with a central angle of 90 ° between two roller conveyors.
[0065]
Moreover, although the pallets 12 and 14 in the long object conveyance pallet apparatus 10 in the example of the said embodiment are circular by planar view, this invention is not limited to this, For example, FIG. 10 (A) As shown in FIG. 10, the oval pallet 15A, or as shown in FIG. 10 (B), the 180 ° region on the front end side in the transport direction is a convex arc shape, and the other portions are cut off linearly. Alternatively, it may be a partially square pallet 15B.
[0066]
However, the maximum widths of these pallets 15A and 15B must be large enough to change the direction between the roller conveyors.
[0067]
Furthermore, the fixed-type direction change guide 50 has a concave arc-shaped guide surface, which may be a fixed type direction-change guide 51 having an inclined linear guide surface as shown in FIG. Good.
[0068]
【The invention's effect】
Since this invention was comprised as mentioned above, it has the outstanding effect that it can change direction at high speed at the time of conveyance of a long thing, without enlarging the installation space in a direction change area | region.
[Brief description of the drawings]
FIG. 1 is a plan view showing a pallet apparatus for conveying a long object according to an embodiment of the present invention. FIG. 2 is a front view thereof. FIG. 3 is an enlarged side view of a portion corresponding to line III-III in FIG. FIG. 5 is a plan view showing an outline of a long object transport system according to an example of an embodiment of the present invention. FIG. 5 is a plan view showing an enlarged direction change guide and its vicinity in the long object transport system. FIG. 7 is a block diagram showing a control system in the long object conveying system. FIG. 8 is a block diagram showing a direction change area in the long object conveying system. FIG. 9 is a plan view showing an example using a caster roller having another structure. FIG. 10 is a plan view showing another pallet in a pallet apparatus for conveying long objects. Plan view showing shape [Fig. 11] Long object Plan view showing another shape of fixed diverting guide in transmission systems [Description of symbols]
DESCRIPTION OF SYMBOLS 10 ... Pallet apparatus 12, 14, 15A, 15B for long article conveyance ... Pallet 16 ... Connection bar 18 ... Connection plate 20 ... Rotation bush 22 ... Rotation center shaft 24 ... Support part 26 ... Slide plate 28 ... Circular recessed part 29 ... Screw DESCRIPTION OF SYMBOLS 30 ... Long material conveyance system 32 ... 1st roller conveyor 34 ... 2nd roller conveyor 36 ... 3rd roller conveyor 38 ... 4th roller conveyor 40 ... Direction change guide 40A ... Guide surface 40B ... Linear guide surface 41 ... Vertical axis 42 ... Air cylinder 44 ... Circular rotation guide 44A ... Small diameter part 44B ... Large diameter part 46 ... Conveyor roller 46A ... Sprocket wheel 48 ... Width direction side end guides 50, 51 ... Fixed type direction change guide 52 ... Long material conveyance mounting Jig 54 ... Support plate 56 ... Conveyed material receiving portion 58 ... Connection stay 60 ... Positioning pin 62 ... Control device 64 ... Direction換領 range 66 ... conveyor roller 66A ... modest roller 68 ... caster roller

Claims (13)

Separated in the longitudinal direction by a pair of pallets in which the lower side is substantially flat and at least half of the outer periphery is a continuous curved surface convex outward, and a support provided on the upper side of these pallets And two connecting bars that are rotatably supported around a vertical axis with respect to the pallet, and thereby connect the pair of pallets, directly or on the pair of pallets. A long conveyed product can be placed via a connecting bar, and the support portion is provided on a rotation center shaft attached to the pallet side, and provided on the connection bar side, and is rotatable by the rotation center shaft. A rotating bush to be supported; and a ring-shaped slide plate that is provided on a connecting plate integral with the rotating bush and that is slidably contacted with the upper surface of the pallet in the rotational direction. And the long object conveying pallet and wherein the are.   2. The pallet apparatus for conveying a long object according to claim 1, wherein the pallet is circular in a plan view.   3. The pallet device for conveying a long object according to claim 1 or 2, wherein the support portion is arranged at a shape center of the pallet in plan view. In Claim 3 , The said rotation center axis | shaft penetrates the said bush, and is protruded upwards, The protrusion amount is below one side of the said long conveyance thing or the jig | tool for mounting this long conveyance article. A pallet device for conveying a long object, characterized in that the length can be engaged from the side. A pallet device for transporting a long object according to any one of claims 1 to 4 , and a transport device for supporting and transporting the pallet device for transporting a long object from the lower surface of the pallet. The apparatus includes at least a first conveyor and a second conveyor having a conveyance width larger than a width in a direction orthogonal to the conveyance direction of the pallet, and the second conveyor is It is arranged to intersect from one side of the first conveyor, in the vicinity of the intersection of the first conveyor and the second conveyor, from the vicinity of the side opposite to the side of the first conveyor, the first in the second conveyor A direction changing guide is provided which has a continuous guide surface near the side surface on the downstream side of the conveyor and guides the pallet conveyed on the first conveyor onto the second conveyor along the guide surface. Long conveying system, characterized in that is. 6. The direction change guide according to claim 5 , wherein the direction changing guide is disposed so that the guide surface can freely move in and out on the conveyance surface of the first conveyor, and abuts on a pallet conveyed on the first conveyor, 2. A long object transporting system that is selectively driven to a direction changing position that guides in the direction of two conveyors and a direction non-changeable position that does not guide in the second conveyor direction even if they are not contacted or contacted. 7. The direction change guide according to claim 6 , wherein the direction change guide is a lever supported so as to be swingable in a horizontal plane by a vertical axis outside the transport surfaces of the first and second conveyors, and one side surface of the lever in the horizontal direction is the guide. The other surface is a width-direction end surface on the second conveyor side of the first conveyor at the non-converting position, and forms a linear guide surface that closes the second conveyor. Long object transport system. Conveyor according to claim 5, 6 or 7, the pallet redirecting area is a region intersecting with the conveying surface of the second conveyor in the conveying surface of the first conveyor, having a rotation axis in the width direction of the first conveyor A plurality of rollers arranged in parallel in the transport direction, each conveyor roller coaxially supporting a plurality of narrow rollers, and each narrow roller is rotatable independently of each other. Material transport system. According to claim 5, 6 or 7, conveying the pallet redirecting area is a region intersecting with the conveying surface of the second conveyor in the conveying surface of the first conveyor, each of which said pallet in any direction in a horizontal plane 2. A long object conveying system comprising a plurality of possible caster rollers distributed two-dimensionally. 6. The width direction of the first conveyor according to claim 5 , wherein the direction changing guide is fixed, and the fan-shaped pallet direction changing area of approximately ¼ circle extending from the conveying surface of the first conveyor to the conveying surface of the second conveyor. A plurality of conveyor rollers each having a rotation axis are arranged in parallel in the transport direction. Each conveyor roller coaxially supports a plurality of narrow rollers, and each of the narrow rollers can be rotated independently of each other. A long object conveying system characterized by that. 6. The direction change guide according to claim 5 , wherein the direction change guide is fixed, and each of the pallets is placed on a horizontal plane in a sector-shaped pallet direction change area of approximately ¼ circle extending from the transfer surface of the first conveyor to the transfer surface of the second conveyor. A long object conveying system comprising a plurality of caster rollers that can be conveyed in an arbitrary direction in a two-dimensional manner. A pallet device for transporting a long object according to any one of claims 1 to 4 , and a transport device for supporting and transporting the pallet device for transporting a long object from the lower surface of the pallet. The apparatus includes at least a first conveyor and a second conveyor having a conveyance width larger than a width in a direction orthogonal to the conveyance direction of the pallet, and the first and second conveyors constitute a linear conveyance surface, And the 1st conveyor is arranged so that the conveyance direction exit may be connected to the linear conveyance surface of the 2nd conveyor from the side, and the pallet conveyed on the 1st conveyor is on the 2nd conveyor A long object transport system characterized in that it is transferred to the machine. Guided in any one of claims 5 to 1 2, in the direction changing inner corners at the intersection of the first conveyor and the second conveyor, the pallet from the first conveyor are diverted onto the second conveyor A long object conveyance system comprising a circular rotation guide having at least a 1/4 convex arcuate guide surface.

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