Conveyor

Abstract

To provide a conveyance device that changes a conveyance direction of a pallet.SOLUTION: A conveyance device includes in a course direction change part 8: a first conveyor 10 capable of placing and conveying a pallet 30 which can mount a conveyance article thereon; a disk 42 which can mount a pallet carried in from the first conveyor 10 thereon and changes a course rotatable 180 degrees; a drive part which rotationally drives the disk 42; and a second conveyor 20 which mounts a pallet to be carried in via the disk 42 thereon so as to be conveyed. The conveyance device further includes: an inner guide 24 for regulating a movement of the pallet mounted on the disk 42 in a disk rotation diameter inward direction; and an outer guide 25 for regulating the movement of the pallet mounted on the disk 42 in a disk rotation diameter outward direction. A guide rail 37 extending above the disk 42 from the first conveyor 10 regulates a direction perpendicular to a conveyance direction of the pallet. As a result, the conveyance direction of the pallet can be changed with a reduced number of components due to low energy loss without lowering a conveyance speed.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present invention relates to a conveying device that changes the direction in which a pallet is conveyed. [Background technology]

[0002] Conventionally, when changing the direction of travel for small pallets, the pallets have been lifted from the transport lane to change course, or a large conveyor has been used to change course for the pallets. In this type of conventional technology, the operation of each part was a combination of multiple movements, so intermittent operation was performed in which the next transported item waited until the previous transported item was finished.

[0003] As another example of a conveying device, the conveying device described in Patent Document 1 discloses a first conveyor for conveying a square pallet that has a direction relative to the flow of the transported goods, a second conveyor for conveying that is perpendicular to the first conveyor, a third conveyor for conveying that is perpendicular to the second conveyor and has a conveying direction opposite to that of the first conveyor, a fixed guide for conveying the pallet while maintaining its direction relative to the flow direction of the pallet from the first conveyor to the third conveyor, and a guide section consisting of a turntable that is driven separately from the conveyor. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 61-69615 Summary of the Invention [Problem to be solved by the invention]

[0005] The conveying device of Patent Document 1 has a 180-degree direction change section in which a linear second conveyor is provided in a direction perpendicular to the first conveyor, and the second conveyor is driven in a linear direction perpendicular to the first and third conveyors. The transported products placed on the second conveyor are guided in a 180-degree turn by a fixed guide corresponding to the outer guide and a turntable corresponding to the inner guide.

[0006] In this conventional conveying device, frictional forces are generated by the pressing between the outer circumferential surface of the turntable, the belt, and the square pallet, resulting in a large energy loss.

[0007] Patent Document 1 discloses that the turntable is driven by a drive device separate from that of the second conveyor.

[0008] The present invention has an object to provide a conveying device that changes the conveying direction of a pallet on which an article is placed, using a configuration different from that of Patent Document 1. SUMMARY OF THE PRESENT EMBODIMENT An object of the present invention is to provide a conveying device which allows the conveying direction of a pallet to be changed with low energy loss and a reduced number of parts without reducing the conveying speed. [Means for solving the problem]

[0009] The conveying device of the present invention is a conveying device capable of changing the path of a pallet (30) on which an article can be placed, and includes a first conveyor (10) on which the pallet can be placed and conveyed, a path changing section (7, 8, 9) which changes the path of the pallet within an angular range of more than 0 degrees and 180 degrees from the conveying direction of the first conveyor, a disk (12, 42) on which the pallet carried in from the first conveyor can be placed and which can rotate, a drive section (11) which drives and rotates the disk, and A second conveyor (20) capable of placing and transporting a pallet carried in from the first conveyor via the disk, inner guides (14, 24) above an upper surface (121, 421) of the disk for restricting the movement of the pallet placed on the disk inwardly in the disk rotation diameter, outer guides (15, 25) above the upper surface of the disk for restricting the movement of the pallet placed on the disk outwardly in the disk rotation diameter, and a guide rail (16, 18) for restricting the movement of the pallet placed on the conveyor in a direction perpendicular to the conveying direction. Rules Control members (37 、38 ) and 、 The regulating member extends above the disk and is slidably provided in the grooves (32, 33) of the pallet. Adopt the configuration.

[0010] According to the conveying device of the present invention, the course direction changing section is configured to be able to turn with a minimum radius and the number of components can be reduced, which contributes to space saving and area saving. By changing the shape of the outer guide or inner guide, the direction can be changed at any angle from over 0 degrees to 180 degrees.

[0011] The unit can be placed above the conveyor, which makes it easy to save space. The configuration reduces the number of operation steps, which shortens the transportation time. In addition, the number of parts and actuators in the transportation device can be reduced. By making some improvements to the pallet on which the transported items are placed, in combination with the configuration of the transport device, the pallet can be transported smoothly without falling off the path.

[0012] According to the present invention, it is not necessary to consider the tact time when rotating the pallet without stopping the pallet. The present invention allows for continuous operation when transporting pallets, allowing for rapid changes of direction.

[0013] In comparison with Patent Document 1, the present invention does not have a conveyor equivalent to the second conveyor that is driven in a linear direction as disclosed in Patent Document 1. The present invention has a disk that is a rotating body. The present invention differs from Patent Document 1 in that a pallet is placed on the upper surface of the disk.

[0014] In the present invention, the inner guide is fixed. The inner guide mechanically restricts the radially inward movement of the transported product placed on the disk. In contrast, the turntable of Patent Document 1, which corresponds to the inner guide that restricts the radially inward movement of the radially inward wall of the pallet, is different from the inner guide of the present invention in that it is assumed to rotate. [Brief description of the drawings]

[0015] [Figure 1] FIG. 1 is a perspective view of a pallet conveying direction changing device according to a first embodiment of the present invention; [Diagram 2] FIG. 2 is an enlarged perspective view of part II in FIG. [Diagram 3] FIG. 3 is an enlarged perspective view of part III in FIG. [Figure 4] Plan view of the 90 degree travel direction change section, [Diagram 5] 9 is a perspective view of a 90-degree travel direction change unit; [Figure 6] FIG. 2 is a perspective view showing the relationship between the pallet and the outer guide at the 90-degree travel direction change section; [Figure 7] 180 degree travel direction change section perspective view; [Figure 8] FIG. 2 is a plan view showing the positional relationship between the pallet moving in the 90-degree travel direction change section and the inner guide and outer guide; [Figure 9] FIG. 13 is a perspective view showing the positional relationship between the pallet moving through the 90-degree travel direction change section and the inner guide and outer guide; [Figure 10] FIG. 18 is a plan view showing the positional relationship between the pallet moving in the 180-degree travel direction change section and the inner guide and outer guide; [Figure 11]18 is a perspective view showing the positional relationship between a pallet that moves in the 180-degree direction change section and an inner guide and an outer guide. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0016] Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that, in a plurality of embodiments, substantially the same components are denoted by the same reference numerals, and the description thereof will be omitted.

[0017] First embodiment A first embodiment of the present invention will be described with reference to FIGS. 1 to 3, the conveyor of this embodiment according to the transport device of the present invention is belt-driven. In the conveyors 5 and 6, the belt 1 is driven in the main flow direction along the main passage.

[0018] The branch path that branches off from the main path of the conveying device includes a first conveyor 10 that heads toward the rear of the conveying device, a 180-degree course direction change section 8 that makes a U-turn in the return direction, and a second conveyor 20 that returns to the main path.

[0019] The pallet carrying the goods to be transported in the main flow path passes through a 90 degree course change section 7 from the conveyor 5, is transferred to the first conveyor 10 which moves in a straight line backwards, makes a U-turn at a 180 degree course change section 8, and is transferred to the second conveyor 20 which moves in a straight line in the opposite direction to the first conveyor 10, and then passes through a 90 degree course change section 9 from the second conveyor 20, and is returned to the conveyor 6 of the main flow path. <About the 90 degree change in direction section 7>

[0020] An embodiment of the 90-degree direction changer of the present invention is shown by reference numeral 7 in FIGS. As shown in FIGS. 2, 4 and 5, a disk 12 on a base 13 rotates in the direction of an arrow 16 when a drive motor 11 installed below the base 13 rotates.

[0021] An inner guide 14 and an outer guide 15 are fixed to the base 13 near the disk 12 . The inner guide 14 is fixed to the base 13 at the center of the disk 12 at the 90 degree course direction change section 7. The inner guide 14 has a curved inner guide surface 141 that restricts the movement of a pallet (not shown) in the radially inward direction above the upper surface 121 of the disk 12 when the pallet entering in the carry-in direction is rotated in the rotation direction indicated by the arrow 16 on the disk on the upper surface 121 of the disk 12, and has a straight inner guide surface 142 at the entrance of the inner guide surface 141 and a straight inner guide surface 143 at the exit of the inner guide surface 141. The inner guide surface 142 and the inner guide surface 143 form an angle of 90 degrees with each other.

[0022] The outer guide 15 has a shape that forms an arc-shaped outer guide surface 151 so as to prevent a pallet (not shown) from jumping out radially outward above the upper surface 121 of the disk 12 at the 90-degree course direction change section 7. The outer guide 15 has a straight outer guide surface 152 to guide the flow direction of a pallet (not shown) carried in from the conveyor 5 at the entrance of the outer guide surface 151, and has a straight outer guide surface 153 to guide the flow direction of a pallet (not shown) carried out to the first conveyor 10. The outer guide 15 has an outer guide surface 151 that is a concave arc surface facing the outer peripheral surface of the disk 12, between the outer guide surfaces 152 and 153, above the upper surface 121 of the disk 12, at a position of the same diameter from the center of rotation of the disk 12. The entrance side of the outer guide surface 151 has a slope 154 that guides the pallet (not shown) to be carried in.

[0023] The outer guide is made of a material with good sliding properties, for example, a resin such as polyethylene. The configuration of the conveyor 5 at the entrance of the 90 degree course direction change section 7 is similar to the configuration of the first conveyor 10 which will be described later. <Explanation of fork in the road>

[0024] 1 and 3, the first conveyor 10 includes a belt 1 that moves via a pulley rotated by a drive motor (not shown), and a guide rail 37 that corresponds to a first regulating member that regulates the direction perpendicular to the conveying direction of a pallet placed on the belt 1. The guide rail 37 extends to above the disk 42. This guides the pallet transferred from the belt 1 to the disk 42, and determines the positional relationship between the pallet and the upper surface 421 of the disk 42. The second conveyor 20 includes a belt 1 that moves via a pulley rotated by a drive motor (not shown), and a guide rail 38 that corresponds to a second regulating member that regulates the direction perpendicular to the conveying direction of a pallet placed on the belt 1. The guide rail 38 extends to above the disk 42. This guides the pallet that is transferred from the disk 42 to the belt 1 of the second conveyor 20. <About Pallets>

[0025] Next, the pallet 30 on which the transported goods are placed will be described with reference to FIGS. The pallet 30 is composed of a rectangular main body 31 and a rectangular platform 34 on the upper stage of the main body 31. A first groove 32 is formed on the bottom surface of the main body 31, which is slidably guided by a guide rail 37 extending in the longitudinal direction of the conveyor 5. The main body 31 also has a second groove 33 formed on the bottom surface of the main body 31, which is slidably guided by a guide rail 38 extending in the longitudinal direction of the second conveyor 20 described later. The first groove 32 corresponds to a first regulated portion, and the second groove 33 corresponds to a second regulated portion.

[0026] The first groove 32 and the second groove 33 of the pallet 30 serve to prevent the main body 31 from falling off the guide rails 37, 38 during transportation and to guide the main body 31 in the transportation direction. The bottom surface of the main body 31 of the pallet 30 comes into contact with the upper surface of the belt 1, and the pallet 30 is stationary on the upper surface of the belt 1 due to frictional force, and is transported in a linear direction by the linear movement of the belt 1.

[0027] The bottom surface of the main body 31 of the pallet 30 comes into contact with the upper surfaces 121, 421 of the disks 12, 42, and the pallet 30 is basically stationary due to frictional forces between the upper surfaces 121, 421 of the disks 12, 42, and is transported in the turning direction by the rotation of the disks 12, 42.

[0028] The main body 31 of the pallet 30 has curved chamfered portions 35 at the four corners. This prevents the corners of the pallet from getting caught on the outer guide when the pallet is placed on the disk 12 and rotates, thereby reducing blockages in the flow of the pallet.

[0029] As a result, when the pallet 30 turns, the two chamfered portions 35 on the inner side of the turning diameter and the surface between the adjacent chamfered portions 35, 35 abut against the inner guide surface 141, restricting the inward movement of the pallet, and the pallet can be smoothly changed in its course by turning. Also, when the pallet turns, the two chamfered portions 35 on the outer side of the turning diameter abut against the outer guide surface 251, restricting the outward movement of the pallet, and the pallet can be smoothly changed in its course by turning. <About the 180 degree change in direction section 8>

[0030] An embodiment of a 180 degree veer of the present invention is shown at 8 in FIGS. In the course direction changing section 8, the pallet is placed on a disk 42 via a first roller 40 and a second roller 41, which serve as free rollers, in the carry-in direction from the first conveyor 10. The disk 42 is driven to rotate in the direction of an arrow 43 by a drive motor (not shown) similar to the drive motor 11 of the course direction changing section 7.

[0031] The inner guide 24 has a circular shape at the 180-degree course direction change section 8, and is fixed to the base 13 at the center of the disk 42. The inner guide 24 has an inner guide surface 241 above the upper surface 421 of the disk 42 that restricts movement of the pallet in the radially inward direction when the pallet entering in the carry-in direction is rotated on the upper surface 421 of the disk 42 in the rotation direction indicated by the arrow 43 of the disk.

[0032] The outer guide 25 has a shape that forms a semicircular outer guide surface 251 so as to prevent a pallet (not shown) from jumping out radially outward above the upper surface 421 of the disk 42 at the 180-degree course direction changing section 8. The outer guide 25 has an outer guide surface 252 in the form of a straight plane so as to guide the flow direction of a pallet brought in from the first conveyor 10 at the entrance of the outer guide surface 251, and has an outer guide surface 253 in the form of a straight plane so as to guide the flow direction of a pallet (not shown) brought out to the second conveyor 20. The outer guide 25 has the outer guide surface 251, which is a 180-degree arc surface, facing the inner guide surface 241 of the disk 42, between the outer guide surfaces 252 and 253 above the upper surface 421 of the disk 42, at a position of the same diameter from the center of rotation of the disk 42.

[0033] At the course direction changing section 8, the pallet is placed on the belt 1 of the second conveyor 20 via the second roller 41 and the first roller 40, which serve as free rollers, in the discharge direction from the disk 42. At this time, the second groove 33 of the pallet is guided by the guide rail 38 extending in the longitudinal direction of the second conveyor 20, the pallet rolls on the second roller 41 and the first roller 40, and is transported in the transport direction (forward direction) of the second conveyor by the frictional force of the belt 1. <About the boundary area between the linear movement section and the turning section>

[0034] Between the belt that moves the pallet in a straight line and the disk that rotates the pallet, first rollers 40 and second rollers 41 corresponding to free rollers are provided in two rows, as shown in Fig. 3. As a result, the first rollers 40 and second rollers 41 support the load of the pallet and the transported goods placed thereon, and smoothly transfer the pallet and the transported goods from the belt 1 to the disk 42 or from the disk 42 to the belt 1.

[0035] In the boundary area between the linear movement section of the first conveyor 10 and the turning section of the disk 42 of the course direction changing section 8, when a pallet is transferred from the belt 1 to the disk 42, the direction of movement of the pallet having the first groove 32 that fits into the guide rail 37 at the entrance of the disk 42 is restricted, guiding the pallet from linear movement to turning movement and properly changing the course direction by 180 degrees. Similarly, at the exit of the disk 42, the direction of movement of the pallet having the second groove 33 that fits into the guide rail 38 is restricted when the pallet turns on the top surface of the disk 42, guiding the pallet from turning movement to linear movement and properly completing the change of course direction. <About Palette Operation>

[0036] Next, the relationship of the position and direction of the pallet with respect to the operating conveyors, belts and disks at the 90 degree course direction change section 7 will be described with reference to Figs.

[0037] 8 and 9, reference numerals 301, 302, 303 indicated by imaginary dashed double-dashed lines indicate imaginary positions of pallet 30 rotating on the upper surface of disk 12. When pallets flow in the direction of the arrows shown in Fig. 8 and 9, the following pallets, which are transported following the preceding pallet, are spaced apart so that the pallets in front and behind do not interfere with each other.

[0038] Similarly, in the 180-degree course direction change section 8, the positions and directions of the pallets relative to the operating conveyors, belts, and disks are shown by imaginary dashed-dotted lines 305, 306, 307, 308, 309, 310, and 311, which indicate imaginary positions of the pallets rotating on the upper surface of the disk 42. As the pallets 30 flow in the direction of the arrows shown in Figures 10 and 11, the following pallets, which are transported following the preceding pallets, are spaced apart so that they do not interfere with each other. <Explanation of 90 degree course direction change part 9>

[0039] An embodiment of the 90-degree direction changer of the present invention is shown by reference numeral 9 in FIGS. 1 and 2 has a configuration basically similar to that of the course direction changing unit 7. Components that are substantially the same as those in the course direction changing unit 7 are given the same reference numerals, and descriptions thereof will be omitted. In the embodiment of the present invention, the present invention may have the following configuration.

[0040] The inner guide may be fixed to the base (13) near the rotation center of the disk and have an inner guide surface (141, 142, 143, 241) for restricting the radially inward movement of the pallet. This allows the pallet to rotate without getting caught in the inner guide when rotating due to the inner guide surface.

[0041] The outer guide may be fixed at a position radially outwardly spaced from the center of rotation of the disk and have an outer guide surface (151, 251) for restricting the radially outward movement of the pallet. This allows the pallet to smoothly change its course direction without getting caught in the outer guide when turning.

[0042] The outer guide surface may have a curved surface of the same curvature at a fixed position a predetermined distance radially outward from the rotation center of the disk, the curved surface having the same curvature for a predetermined distance in the circumferential direction, thereby enabling the pallet to be smoothly placed on the belt at the exit of the course direction changing section.

[0043] The transport device may include a second regulating member (38) that regulates the direction perpendicular to the transport direction of the pallet placed on the second conveyor. This has the effect of guiding the position of the pallet relative to the belt to a fixed position, thereby stabilizing the transport of the pallet.

[0044] The conveying device may include free rollers (40, 41) on which a pallet can be placed in the boundary area between the first conveyor or the second conveyor and the disk, thereby enabling smooth transfer of the pallet from the belt to the disk or from the disk to the belt.

[0045] The pallet may have a first regulated portion (32) that is guided by the first regulating member. This allows the pallet on the belt to be transported stably. Also, the pallet can be transferred stably from the belt to the disk, and the position of the pallet on the disk can be stabilized.

[0046] The conveying device according to claim 5, further comprising a pallet having a second regulated portion (33) guided by the second regulating member. This allows stable transfer from the disk to the belt, and allows stable conveyance of the pallet on the belt. Also, the position of the pallet on the disk can be stabilized. (Other embodiments)

[0047] In the above embodiment, examples of course change angles of 90 degrees and 180 degrees are shown, but the present invention can be applied to angles within the course change angle range between more than 0 degrees and 180 degrees.

[0048] In the above embodiment, the guide rails 37 and 38 of both the first and second conveyors are described, but in other embodiments of the present invention, a single groove on the pallet can be used to fit both guide rails. By adjusting the positions of the guide rails of each conveyor corresponding to the first and second regulating members, the number of grooves on the pallet side can be reduced to one.

[0049] Furthermore, in the pallet according to the present invention, the regulated portion does not have to be a groove, and may be a member of another shape that is in a relationship that is regulated or guided by the regulating member. In the above embodiment, the outer guide has a shape that forms an arc-shaped outer guide surface 151, but in the present invention, the shape of the outer guide surface is not limited. In the present invention, the outer guide surface can be configured to prevent the pallet from expanding outward due to centrifugal force.

[0050] The disk of the present invention may have an anti-slip function on the upper surface of the disk, or may have a cone shape toward the center. The disk may be configured to prevent the pallet placed on the disk from sliding radially outward.

[0051] In the above embodiment, a free roller is provided in the boundary area between the conveyor belt and the disc, but other configurations may be used as guide means instead of free rollers as long as they can smoothly transport pallets from the belt to the disc or from the disc to the belt. In another embodiment, the free rollers can be omitted if the pallet can be smoothly transported between the belt and the disk without the free rollers.

[0052] In the above embodiment, the conveying path direction of the pallet on which the transported goods are placed is changed. However, the present invention may also be embodied in such a way that the pallet itself is the transported goods. In the above embodiment, chamfered portions are provided at the four corners of the pallet, but in other embodiments of the present invention, free rollers may be provided at the four corners of the pallet. In the above embodiment, the material of the outer guide is exemplified, but the present invention is not limited to the above material.

[0053] In the above description of the embodiment, in the course direction changing unit 7, the conveyor 5 corresponds to the first conveyor in the claims, and the first conveyor 10 corresponds to the second conveyor in the claims. In the above description of the embodiment, in the course direction changing unit 9, the second conveyor 20 corresponds to the first conveyor in the claims, and the conveyor 6 corresponds to the second conveyor in the claims.

[0054] As described above, the present invention is not limited to the above-described embodiment, and can be embodied in various forms without departing from the spirit and scope of the present invention. [Explanation of symbols]

[0055] 1 belt, 5. Conveyor (first conveyor), 6. Conveyor (second conveyor), 7, 9 90 degree course change section, 8 180 degree course change section, 10 First conveyor, 11 Drive motor, 12, 42 disc, 13 Foundations, 14, 24 Inside Guide, 15, 25 outer guide, 20 Second conveyor, 30 pallets, 31 Main unit, 32 first groove (first regulated part), 33 Second groove (second regulated part), 37 guide rail (first restricting member), 38 guide rail (second restricting member), 40 First roller (free roller), 41 Second roller (free roller), 141, 142, 143, 241 Inner guide surface, 151, 251 External guide surface.

Claims

1. A conveying device capable of changing the path of a pallet (30) on which a conveyed item can be placed, a first conveyor (10) capable of carrying and transporting a pallet; a rotatable circular plate (12, 42) provided in a path changing section (7, 8, 9) for changing the path of the pallet within an angle range of more than 0 degrees and 180 degrees from the conveying direction of the first conveyor, the circular plate (12, 42) being capable of placing thereon the pallet carried in from the first conveyor; A drive unit (11) that drives the disk to rotate; a second conveyor (20) capable of placing and transporting a pallet carried in from the first conveyor via the disk; an inner guide (14, 24) that is above the upper surface (121, 421) of the disk and that restricts the movement of the pallet placed on the disk toward the inner direction of the disk rotation diameter; an outer guide (15, 25) that is above the upper surface of the disk and restricts the movement of the pallet placed on the disk in the outward direction of the disk rotation diameter; and a regulating member (37, 38) for regulating a direction perpendicular to the conveying direction of the pallet placed on the conveyor, The regulating member extends above the disk and is slidably disposed in a groove (32, 33) of the pallet.

2. A conveying device as described in Claim 1, wherein the regulating member is provided as a single member on the conveying path of the pallet within the width of the conveying path.

3. A conveying device as described in claim 1, wherein the pallet has chamfered portions (35) at the corners.

4. 3. A conveying device according to claim 1 or 2, further comprising an inner guide fixed to a base (13) near the center of rotation of the disk and having an inner guide surface (141, 142, 143, 241) for restricting radially inward movement of the pallet.

5. 3. A conveying device as described in claim 1 or 2, further comprising an outer guide fixed at a position radially outwardly spaced from the center of rotation of the disk and having an outer guide surface (151, 251) for regulating radially outward movement of the pallet.

6. The outer guide surface has the same curve at a fixed position spaced a predetermined distance radially outward from the rotation center of the disk.

6. The conveying device according to claim 5, wherein the curved surface having a given curvature is provided over a predetermined distance in the circumferential direction.

7. A pallet can be placed in the boundary area between the first conveyor or the second conveyor and the disk.

4. The conveying device according to claim 1, further comprising a movable free roller (40, 41).

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