JP4807278B2 - Transport device - Google Patents

Description

  The present invention relates to a transport device that transports objects to be transported placed on a number of carts in a continuous manner along a transport route, and in particular, at a position where the transport route makes a U-turn, the front and rear carts do not interfere with each other. The present invention relates to a transfer device that can reduce the radius of a turn part.

  In a production line for an automobile body or the like, as disclosed in Patent Document 1, a rail installed on a conveyance path and a conveyance direction of a support frame that is attached to a carriage on which an object is placed and supports the carriage A support roller body that is movably engaged by rolling on the rail is attached back and forth, and one end is connected to the support roller body, and the other end rolls on the rail to be movable. A conveying device is used which includes a movable body provided with a pulling member connected to a pulling roller body engaged with.

As shown in FIG. 11, a conventional transfer device 91 similar to this Patent Document 1 includes a rail 60 laid on a transfer path, and a moving body 901 that is movably supported by rolling on the rail 60. It consists of and.
The movable body 901 includes support roller bodies 30 and 30 provided at the front and rear, a support frame 910 that is movably guided and supported on the rail 60 by the support roller bodies 30 and 30, and the support frame 910 via a column 12. A carriage 70 that is mounted and on which the object 80 to be transported is mounted, a traction member 50, 50 having one end connected to the support roller bodies 30, 30 and extending in the front and rear directions of the support frame 910, and the other traction members 50, 50 Pulling roller bodies 40, 40 connected to the ends and guided to be supported by the rail 60 so as to be movable are provided.
Then, the pulling roller body 40 of the rear moving body 901 adjacent to the abutting surface (not shown in the drawing of Patent Document 1) provided on the pulling roller 40 at the rear end of the front moving body 901. An abutting surface (reference numeral 38 in the drawing of Patent Document 1) provided at the front end of the abutting portion abuts and is pressed by a delivery device (not shown) to convey the object 80 to be conveyed.

The rail 60 is provided with a channel having a U-shaped cross section with its opening portions facing each other, and the roller portions of the support roller body 30 and the pulling roller body 40 are inserted into the channel 60 in a substantially straight line. It is configured.
In addition, the support roller body 30 disposed in front of and behind the support frame 910 is supported so that its center can be rotated in the horizontal direction on the center line in the left-right direction of the support frame 910.
Note that the convex frame shown in FIGS. 12 and 13 indicates the outer wall of the conveyance path.
Japanese Patent Laid-Open No. 7-25441

  However, in the conventional transfer device 91 as described above, as shown in FIGS. 12 and 13, the support roller body 30 always passes on the center line of the rail 60, so that the linear portion 601 of the rail 60 has the support frame 910. A straight line connecting the center line and the center of the front and rear support roller bodies 30 moves on a straight line that matches the center line of the rail 60. However, in the U-turn portion 602 of the rail 60, the center portion C9 of the support frame 910 is The radius of rotation of the carriage 70 substantially decreases through the inner side of the arc of the center line of the turn portion 602, and the front and rear carriages depend on the length and width of the carriage 70, the radius of curvature of the U-turn portion 602 of the rail 60, and the like. There may be a problem of mutual interference.

That is, as shown in FIG. 12A, three adjacent mobile bodies 900a, 900b, 900c pass from the direction of arrow B through the straight portion 601 of the rail 60 and through the U-turn portion 602 in the direction of arrow C. When moving, the center part C9 is on the center line of the rail 60 in the moving bodies 900a and 900c in which the support roller bodies 30 and 30 before and after the both are in the straight line part 601.
However, like the moving body 900b shown in FIG. 12 (A) and the moving bodies 900a and 900b shown in FIGS. 12 (B) and 13, at least one of the front and back support roller bodies 30 and 30 is a U-turn portion. If it is at 602, the center portion C9 will deviate from the center line of the rail 60 and will pass through the inside of the U-turn portion 602, and as described above, the front and rear carts may interfere with each other.

In order to prevent this interference, it is difficult to change (decrease) the trolley to a size corresponding to the size of the object to be conveyed because it is necessary to change all the trolleys, and it is difficult to change the number of trolleys. If the radius of curvature of 602 is to be increased, it must be increased by an order of magnitude, and it has not been easy to take countermeasures at limited factory sites.
Further, there is a method of increasing the distance between the carriages to be transported, but there is a problem that the efficiency is lowered because the number of carriages on the transportation path is reduced.

  Therefore, an object of the present invention is to provide a transport device that can easily prevent the interference of the carriage without changing the size of the carriage or the radius of curvature of the U-turn portion of the rail.

  A transport apparatus according to the present invention includes a rail laid on a transport path, a carriage on which an object to be transported can be moved and moved on the transport path, and a support frame that guides and supports the carriage on the rail. A support roller body, which is rotatably arranged in the horizontal direction before and after the support frame, engages the rail so as to be rotatable, and supports the support frame movably on the rail; and the support roller One end is connected to the body and arranged at the front and back of the support frame, the pulling member pulls the support frame in the transport direction, the other end of the pulling member is connected, and the rail is rotatably engaged. A traction roller body that guides and supports the traction member on the rail, and is fixed to the support frame at a fixing portion at a central position between the support roller bodies arranged on the front and rear sides. And can rotate on the rail A support roller body disposed on the front and rear sides of the support roller body, and the support roller body in a horizontal direction on an arc centered on the fixed portion. It is characterized by having a slidable sliding portion.

  Therefore, according to the conveyance device of the first aspect, the support frame is guided by the guide roller body so as to always move on the center line of the rail at the fixed portion of the center portion of the support frame. The support portions of the front and rear support roller bodies are arc-shaped long holes centered on an arc centered on the fixed portion, and the long holes are configured as sliding portions in which the support roller bodies can slide in the horizontal direction. Therefore, in the curved portion of the rail (especially the U-turn portion), it is allowed that the support roller body slides on the sliding portion and the center guide roller body and the front and rear support roller bodies are arranged on the arc of the rail. As a result, the support frame moves so that the center line of the support frame becomes a tangent to the curve of the rail. Therefore, the rotation radius of the support frame is not reduced, and interference between the carriages can be avoided.

  According to the transfer device of the present invention, the movement locus of the central part of the carriage in the U-turn part of the rail is made coincident with the center of the rail, so that the turning radius of the carriage is not reduced, so that interference with the front and rear carriages is avoided. However, the conveyance apparatus which can make the radius of the U-turn part of a rail small can be provided.

Next, an embodiment of a transport apparatus according to the present invention will be described with reference to the drawings. The conveying apparatus of the present embodiment is provided in a drying furnace of a car body painting line.
Here, FIG. 1 is a side view of the transport device, and FIG. 2 is a plan view in which the rail of the transport device is omitted.
In this description, the “front / rear” / “left / right” directions indicate “front / rear” / “left / right” with respect to the transport direction when nothing is refused.

The configuration of the transport device will be described. As shown in FIG. 1, the transport device 1 includes a rail 60 laid on the transport path, and a moving body 100 that rolls on the rail 60.
The moving body 100 includes a carriage 70 on which the object 80 is placed and movable on the rail 60 of the conveyance path, a support frame 10 that guides and supports the carriage 70 on the rail 60, and the support frame 10. Support roller bodies 30, 30 that are rotatably arranged in the front-rear direction and are rotatably engaged with the rail 60 to support the support frame 10 so as to be movable on the rail 60. One end is connected to the support roller body 30 and arranged in front of the support frame 10. The pulling member 50 a pulls the support frame 10 in the transport direction, and the other end of the pulling member 50 a is connected to the rail 60. A pulling roller body 40a that guides and supports the pulling member 50a on the rail 60 and a rear support roller body 30 are connected to one end of the pulling roller body 40a and arranged behind the support frame 10. The follower member 50b that follows the movement of the support roller body 30 and the other end of the follower member 50b are connected to the rail 60 so as to be rotatable, and the follower member 50b is placed on the rail 60. And a guide roller body 20 fixed to the support frame 10 at a central position between the support roller bodies 30 arranged before and after the support frame 10 and movable on the rail 60. I have.

As shown in FIG. 3, the rail 60 is laid with a straight portion 601 and a U-turn portion 602 on a conveyance path (not shown), and has a U-shaped cross section as shown in FIGS. 5 and 8. The openings of the steel channel 61 having the wall portion 611 and the upper and lower flange portions 613 and 612 are opposed to each other, and are arranged in a single line with a predetermined interval so that roller bodies 20, 30, and 40 described later can roll. Has been.
That is, the vertical rollers 21 of the roller bodies 20, 30, and 40 to be described later are arranged so as to roll on the upper surface of the lower flange portion 612 within the opening of the rail 60, and the lateral rollers 22 are arranged on the upper flange portion 613. It arrange | positions so that the plate edge part 613a of a flange front-end | tip may roll.

  The carriage 70 constituting the moving body 100 is formed of a rectangular frame member having a size capable of including a plan view shape of an automobile body that is the transported object 80, and is engaged with a support frame 10 described later at a predetermined position. A joint portion 71 is provided.

The support frame 10 is erected on the flat plate portion 11 having an area smaller than that of the cart 70 and the four front and rear corners of the flat plate portion 11, and engages with the engaging portion 71 of the cart 70 at the upper end to support the cart 70. The support 12 is provided.
As shown in FIGS. 4 and 5, the flat plate portion 11 is provided with a rectangular hole fixing portion 14 at the center C1 in a plan view, and engages with the fixing portion 14 at the upper portion and slides in the vertical direction. A guide roller body 20 that is supported so as not to rotate in the horizontal direction and is guided by the vertical roller 21 and the horizontal roller 22 so as to be able to roll on the rail 60 is provided.

  Further, at the symmetrical position in the front-rear direction centered on the center portion C1 of the flat plate portion 11, as shown in FIG. 2, a slide formed in an arc-shaped slot having an arc centered on the center portion C1 as a center line. As shown in FIGS. 6 to 8, the upper body 301 is engaged with the sliding portion 15 at the upper portion and supported in the horizontal direction so as to be slidable in the horizontal direction. A support roller body 30 including a lower body portion 302 supported by the vertical roller 21 and the horizontal roller 22 so as to be able to roll on the rail 60 is provided. The support roller body 30 transmits and supports the weight of the object 80 and the carriage 70 to the rail 60.

  In the present invention, the guide roller body 20 is provided in the fixed portion 14 of the center portion C1 of the support frame 10 with respect to the above-described conventional transport device 91 having the same shape, and symmetrical positions before and after the transport direction around the center portion C1. Is provided with a sliding portion 15 formed in an arc-shaped elongated hole centering on an arc centered on the central portion C1, and is engaged with the sliding portion 15 to slide horizontally in the elongated hole. Since the support roller body 30 that can be supported is provided, this point will be described in detail.

  As shown in FIGS. 4 and 5, the guide roller body 20 includes a vertical shaft 25 that hangs down, a bearing 23 that is fixed to the lower portion of the vertical shaft 25 in parallel with the rail 60, and a bearing that is provided before and after the vertical shaft 25. Four vertical rollers 21 that are supported on the left and right sides of the bearing 23 by a horizontal shaft provided on the shaft 23 and roll on the upper surface of the lower flange portion 612 of the rail 60, and the vertical shaft 25 above the bearing 23. The bracket 24 is supported by a vertical shaft provided at the same position as the center line of the bearing 23 in front view before and after the bearing 23, and the upper flange portion 613 of the rail 60. The support frame 10 is connected to the lower body portion 202 having two lateral rollers 22 that roll on the plate end portion 613a, a rotation stopper 27 (described later) screwed to the bracket 24, and the upper portion of the vertical shaft 25. And a body portion 201 having a square shaft 26 of square cross-section which is inserted into square hole shaped fixing portion 14 provided at the center of the flat plate portion 11.

  Between the lower part of the square shaft 26 and the bracket 24, a plate-like detent 27 is screwed to the bracket 24 at the lower end so that the guide roller body 20 does not rotate in the horizontal direction with respect to the support frame 10. The upper part is attached so as to contact the lower part of the angular shaft 26.

  As shown in FIGS. 6 to 8, the support roller body 30 is engaged with a sliding portion 15 provided on the support frame 10 and rolls, and a lower body portion 202 of the guide roller body 20. And a lower body 302 having substantially the same configuration.

  The lower body portion 302 includes a vertical shaft 35 that hangs down, a bearing 23 that is fixed to the lower portion of the vertical shaft 35 in parallel with the rail 60, and a horizontal shaft that is provided on the bearing 23 before and after the vertical shaft 35. Four vertical rollers 21 supported on the left and right and rolling on the upper surface of the lower flange portion 612 of the rail 60, a bracket 34 attached to the vertical shaft 35 above the bearing 23, and the bracket 34 Are supported by a vertical shaft provided at the same position as the center line of the bearing 23 in front view before and after the bearing 23, and roll on the plate end portion 613a of the upper flange portion 613 of the rail 60. And a horizontal roller 22.

  A plate-like connecting portion 341 extending obliquely upward on the opposite side of the guide roller body 20 is provided at one end of the upper surface of the bracket 34 opposite to the guide roller body 20, and a pulling member 50a described later is provided. One end is connected by a horizontal shaft 501 so as to be rotatable in the vertical direction.

The upper body part 301 is provided on the upper part of the vertical shaft 35, and is supported by a bearing 33 extending in a direction orthogonal to the bearing 23 of the lower body part 302 in a plan view, and an axis extending concentrically with the bearing 23 on the upper part of the bearing 33. The horizontal roller 32 that rolls within the sliding portion 15 of the flat plate portion 11 and two shafts that penetrate through the front and rear sides of the bearing 33 are supported respectively, and the lower surface of the flat plate portion 11 is set in the horizontal direction. And four vertical rollers 31 that roll on the surface.
7 shows the upper body 301 viewed from the direction of arrow A in FIG. 6, and the lower body 302 is omitted.

Next, the pulling roller body 40a provided in front of the support frame 10 has the same configuration as the lower body portion 302 of the support roller body 30 as shown in FIGS. This is a vertical shaft 45 that does not protrude.
Although not shown, the pulling roller body 40a is provided with an engaging portion that engages with a drive chain disposed in parallel with the rail 60, and this engaging portion engages with a transmission body provided on the drive chain. Then, the support frame 10 and the carriage 70 are conveyed on the rail 60 via the pulling roller body 40a and the pulling member 50a.
Therefore, it is the front pulling roller body 40a, the pulling member 50a, and the front support roller body 30 that pull the support frame 10 and the carriage 70.

  The configuration of the driven roller body 40b and the driven member 50b provided behind the support frame 10 is the same as that of the pulling roller body 40a and the pulling member 50a and is provided symmetrically in the front-rear direction. Is merely engaged with the rear supporting roller body 30 and moved.

  As shown in FIGS. 1 and 6, the pulling member 50a and the driven member 50b are swingable in the horizontal direction by the vertical axis 502 and can be rotated in the vertical direction by the horizontal axis 501 at both ends of the steel pipe main body 51. The movable joint 52 is connected to the connecting portion 341 of the support roller body 30 by the horizontal shaft 501 and the other joint 52 is similarly connected to the pulling roller body 40a and the driven roller body 40b. The parts 341 are respectively connected by a horizontal axis 501.

The operation when the moving body 100 configured as described above moves on the rail 60, particularly on the U-turn portion 602, will be described.
First, as described with reference to FIGS. 4 and 5, since the guide roller body 20 is fixedly attached to the support frame 10 (not swingable), the movable body 100 can extend in the direction in which the support frame 10 extends. In this case, since it coincides with the center line of the carriage 70 in the conveying direction, the rail 60 moves in a state where the center lines of the support frame 10 and the like coincide with each other on the straight portion 601, and in the curved portion such as the U-turn portion 602, As shown in FIG. 3, the center portion C1 of the support frame 10 or the like moves so as to coincide with a tangent line that touches the arc of the curved portion.

Therefore, as shown in FIG. 9A, three adjacent mobile bodies 100a, 100b, 100c pass from the direction of arrow B in the direction of arrow C while passing through the straight portion 601 of the rail 60 and the U-turn portion 602. When moving, the center line of the driven member 50b behind the moving body 100a whose center C1 is in the straight line 601 is on the center line of the rail 60. At this time, the lateral roller 32 of the support roller body 30 is also in the sliding portion 15. In the middle of.
Further, since the pulling roller body 40a at the front end of the front pulling member 50a is hung on the U-turn portion 602, the center line of the pulling member 50a deviates from the center line of the rail 60, but the rear end of the pulling member 50a is supported. Since the roller body 30 is still in the linear portion 601 of the rail 60, the lateral roller 32 is in the center of the sliding portion 15.

The moving body 100c in the linear portion 601 is the same as the above, except that the state of the pulling member 50a and the driven member 50b with respect to the rail 60 is reversed.
In the moving body 100b at the deepest portion of the U-turn portion 602, the center portion C1 is on the center line of the rail 60, and the center line of the moving body 100b including the center portion C1 coincides with the tangent line of the U-turn portion 602.

At this time, the front and rear support roller bodies 30 connected to the pulling member 50a and the driven member 50b are slid to a position near the inside of the U-turn portion 602 of the sliding portion 15 by the lateral roller 32.
That is, in the U-turn portion 602 of the rail 60, the center portion C1 of the moving body 100b does not approach the inside of the U-turn portion 602, and only the support roller body 30 is moved by the lateral roller 32 in the sliding portion 15 within the U-turn portion 602. Since the carriage 70 does not move toward the inside (the turning radius does not decrease), the distance between the front and rear moving bodies 100a and 100c does not decrease accordingly.

FIG. 9B shows a state in which the moving body 100 has further moved, and the previous moving body 100c has completely reached the linear portion 601, and the subsequent moving body 100b has moved slightly to the front moving body 100c side. It shows a state.
Next, FIG. 10A shows a state in which the state further moves from the state of FIG. 9B and the gap between the subsequent moving body 100b and the previous moving body 100c becomes the smallest. As described above, since the moving body 100b moves without moving toward the inside of the U-turn portion 602, the moving bodies 100b and 100c move with a slight gap without interference, as shown in FIG. 10B. In addition, after this, it is possible to move while increasing the gap.
In FIG. 10A, it seems that there is no gap between the moving bodies 100b and 100c, but actually, in this embodiment, there is a gap of 18 mm.

  As described above, according to the transport device 1 of the present embodiment, the guide roller body 20 guided to be able to roll on the rail 60 is fixed to the center portion of the support frame 10 so as not to swing in the horizontal direction. The support roller body 30 is engaged with the sliding part 15 having a long hole shape along the center line of the arc centering on the guide roller body 20 before and after the support frame 10 and is slidably supported in the horizontal direction. Since the front support roller body 30 is pulled by the pulling member 50a and the pulling roller body 40a connected to the tip thereof, the center portion C1 of the support frame 10 always passes through the center of the rail, and the support frame 10 is moved so that the center line in the transport direction coincides with the tangent line of the arc at the U-turn portion 602 of the rail 60, so that the support frame 10 does not move inside the arc at the U-turn portion 602. It eliminates the interference Aitonaru carriage 70, it becomes possible to reduce the radius of curvature of the U-turn portion 602.

In addition, this invention is not limited to the thing of the said embodiment, A various change is possible in the range which does not deviate from the meaning.
For example, in the above-described embodiment, the guide roller 20 has been described as being disposed at the center of the moving body 100. However, the present invention is not limited to this, and the guide roller 20 may be disposed at a position offset to the left or right. However, in this case, it is necessary to increase the radius of curvature of the U-turn portion on the opposite side in a rail having a portion that bends on the opposite side to the side on which the U-turn portion is offset.
Moreover, although demonstrated in the U-turn part of a rail, there exists an effect | action and effect similar to the above also in a gentle curve part.
In addition, as a device for driving the moving body, the description has been made with the description that the driving body is pulled and driven by the pulling roller body that engages with the transmission body provided in the drive chain. It is good also as an apparatus which moves all the moving bodies by making it contact and press.

It is a side view of the conveyance apparatus which concerns on one embodiment of this invention. It is a top view which abbreviate | omitted the rail of the conveying apparatus which concerns on one embodiment of this invention. It is a schematic plan view of the state which the mobile body located in the deepest part of the U-turn part of a rail of the conveying apparatus concerning one embodiment of the present invention. It is a side view of the guide roller body of the conveying apparatus which concerns on one embodiment of this invention. It is a front view of the guide roller body of the conveying apparatus which concerns on one embodiment of this invention. It is a side view of a support roller body of a conveyance device concerning one embodiment of the present invention. It is a top view of the upper-body part of a support roller body of the conveying device concerning one embodiment of the present invention. It is a front view of the support roller body of the conveyance apparatus which concerns on one embodiment of this invention. BRIEF DESCRIPTION OF THE DRAWINGS It is a schematic plan view of the state which the adjacent mobile body approached the U-turn part of the rail of the conveying apparatus which concerns on one embodiment of this invention, (A) is the center mobile body of the U-turn part of a rail. The state located in the deepest part, (B) is a schematic plan view of the state which moved further. BRIEF DESCRIPTION OF THE DRAWINGS It is a schematic plan view of the state which the adjacent mobile body approached the U-turn part of the rail of the conveying apparatus which concerns on one embodiment of this invention, (A) moves further and is the foremost mobile body and the middle. FIG. 4B is a schematic plan view of a state in which the moving body is closest, and FIG. It is a side view of the conventional conveying apparatus. It is the schematic plan view of the state corresponding to FIG. 9 which the conventional conveying apparatus moved. It is a schematic plan view of the state corresponding to FIG. 10 which the conventional conveying apparatus moved.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Conveyance apparatus 100 Moving body 10 Support frame 14 Fixing part 15 Sliding part 20 Guide roller body 30 Support roller body 201, 301 Upper body part 202, 302 Lower body part 21, 31 Vertical roller 22, 32 Horizontal roller 24, 34 Bracket 26 Angular shaft 27 Anti-rotation 341 Connecting portion 40a Pulling roller body 40b Driven roller body 50a Pulling member 50b Driven member 51 Main body 52 Joint 60 Rail 601 Linear portion 602 U-turn portion 70 Bogie 80 Conveyed objects C1, C9 Center portion

Claims (1)

Rails laid on the transport path;
A carriage capable of placing an object to be conveyed and moving on the conveyance path;
A support frame for guiding and supporting the carriage on the rail;
A support roller body that is rotatably arranged in the horizontal direction before and after the support frame, and rotatably engages with the rail, and supports the support frame movably on the rail;
A traction member having one end connected to the support roller body and disposed before and after the support frame, and pulling the support frame in the transport direction;
A pulling roller body connected to the other end of the pulling member, rotatably engaged with the rail, and guiding and supporting the pulling member on the rail;
In a transfer device comprising:
A guide roller body that is fixed to the support frame and that is rotatably supported by the rail is provided at a fixing portion at a central position between the support roller bodies that are disposed at the front and rear, and
The support portion of the support roller body arranged at the front and rear is configured to be a sliding portion in which the support roller body can slide in a horizontal direction on an arc centered on the fixed portion. A transport device.

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