JP2004114772A - Truck conveyor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a compact truck conveyor which requires no large installation area. <P>SOLUTION: The truck conveyor comprises a plurality of trucks 17, a pair of right and left feed rails 11 and 12 which extend parallel to each other to allow the loaded truck 17 to travel with a work W conveyed loaded astride thereon, and a pair of right and left return rails 13 and 14 which extend parallel to the feed rails and parallel to each other to allow the empty truck 17 to travel. The empty truck 17 travels on the return rails 13 and 14 while passing through below the work W. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a truck conveyor used for transporting a vehicle body on an automobile assembly line, for example.
[0002]
[Prior art]
Conventionally, as this type of bogie conveyor, a plurality of bogies, a pair of left and right feed rails running parallel to each other and running a real bogie placed on a conveyed object, and parallel to each other and parallel to each other. It is known that the vehicle is provided with a pair of left and right return rails for traveling an empty truck, and the empty truck can travel on the return rails passing outside the conveyed product (for example,
See Patent Document 1. ).
[0003]
[Patent Document 1]
JP-A-5-255893
[Problems to be solved by the invention]
In the conventional truck conveyor described above, since the empty truck is returned through the outside of the conveyed object being conveyed on the feed rail, the transport route of the empty truck may protrude outside the transport route of the conveyed item. Therefore, a space corresponding to the sum of both transport routes is required, and a large installation area is required.
[0005]
An object of the present invention is to provide a compact truck conveyor that does not require a large installation area.
[0006]
[Means for Solving the Problems]
The bogie conveyor according to the present invention includes a plurality of bogies, a pair of left and right feed rails extending parallel to each other and running a real bogie placed on a conveyed object, and an empty bogie extending parallel to each other and parallel to these. In a bogie conveyor provided with a pair of left and right return rails to be run, an empty bogie can travel on the return rails under the same conveyed material.
[0007]
In the truck conveyor according to the present invention, the empty truck is returned through the lower side of the transported product placed over the truck on the feed rail, so that the transport route of the empty truck projects outside the transport route of the transported product. There is no need for a large installation area, and a compact bogie conveyor can be provided.
[0008]
Further, on each of the left and right sides, a double return rail is disposed diagonally below the double feed rail, and if the double feed rail is upward and the double return rail is inward or outward, the feed rail and the return rail are arranged. It is possible to arrange them close to each other, so that space can be saved.
[0009]
Also, on each of the left and right sides, a double return rail is disposed diagonally below the both feed rails, and if both the feed rails are upward and the both return rails are inward, the empty carriage will ride on both return rails. Can be run with their respective ceiling portions facing each other, so that further space saving can be achieved.
[0010]
In addition, bogie transfer rails are arranged at both ends of both the feed rail and the return rail, and at both ends, the rails are attached to a horizontal rotating shaft extending in the rail length direction. , The point rail can be moved with a simple operation.
[0011]
Also, the bogie has a driven rod extending in the rail length direction so that a propulsive force can be applied to the bogie by frictionally engaging with a side surface of the driven rod of the bogie on at least one of the feed rails. If the friction rollers are arranged and the friction rollers are arranged so as to frictionally engage with the bottom surfaces of the driven rods of the carriage on both return rails and to apply a propulsive force to the carriage, it is impossible for the carriage. The bogie can be quietly and smoothly run on the feed rail and the return rail without applying force or the like.
[0012]
BEST MODE FOR CARRYING OUT THE INVENTION
An embodiment of the present invention will be described below with reference to the drawings.
[0013]
In the following description, the front and rear refer to FIG. 1 as a reference, the right side is referred to as front, the opposite side is referred to as rear, and the left and right refer to the left and right sides as viewed from the rear.
[0014]
Referring to FIGS. 1 and 2, a carry-in station I1 and a carry-out station I2 are provided separately behind and in front. A pair of left and right feed rails 11 and 12 extend forward and parallel from the carry-in station I1 to the carry-out station I2. On the other hand, a pair of left and right return rails 13 and 14 extend rearward and parallel to each other from the unloading station I2 to the loading station I1. Both feed rails 11, 12 are upward, while return rails 13, 14 are inward.
[0015]
A loading-side switching device 15 is arranged at the loading station I1, and a loading-side switching device 16 is arranged at the unloading station I2. A plurality of right and left carriages 17 are placed on the left and right feed rails 11 and 12 and the return rails 13 and 14, respectively. A conveyed object W is placed on a carriage 17 on the feed rails 11 and 12.
[0016]
From the carry-out station I2 to the carry-in station I1, a plurality of pairs of left and right vertical plate yokes 18 and 19 are arranged at equal pitches on the floor. At the top of the left yoke 18, a notch 21 for passing an actual bogie is formed, and at a right edge thereof, a notch 22 for passing an empty bogie is formed. The right yoke 19 has a left and right direction opposite to that of the left yoke 18, and has a notch 23 for passing a real bogie at the top and a notch 24 for passing a right empty bogie at the left edge.
[0017]
A left actual bogie feeder 25 and a left empty bogie feeder 26 are vertically mounted on the left yoke 18, and a right real bogie feeder 27 and a right empty bogie feeder 28 are vertically mounted on the right yoke 19. The left actual bogie feeder 25, the left empty bogie feeder 26, the right real bogie feeder 27, and the right empty bogie feeder 28 are arranged at an equal pitch equal to the pitch of the yokes 18, 19, and are provided with friction rollers 25a, 26a, 27a. , 28a. Further, these feeders 25 to 28 are urged by elastic force in a direction to approach / separate from the rails 11 to 14.
[0018]
The left feed rail 11 includes a pair of left and right feed rail members 31 and 32 each having a substantially U-shaped cross section. Both left feed rail members 31 and 32 are attached to the opening edge of the left actual bogie passage notch 21 with the openings facing each other. Downward left-turning edges 33 and 34 are provided at the distal end portions of the lower flanges of both left feed rail members 31 and 32. The right feed rail 12 has the same structure as the left feed rail 11, and includes a pair of right and left right feed rail members 35 and 36. Both right feed rail members 35 and 36 are attached to the opening edges of the notch 23 for passing the actual right bogie. Downward right-turning edges 37, 38 are provided at the distal end portions of the lower flanges of both right feed rail members 35, 36.
[0019]
The left return rail 13 is like a left feed rail 11 turned clockwise, and a pair of upper and lower left return rail members 41 attached to the opening edge of the left empty bogie passing notch 22 so as to face each other. 42. Left-turning left-hand bent edges 43 and 44 are provided at the front ends of the left flanges of both left return rail members 41 and 42. The right return rail 14 is similar to the left return rail 13, as if the right feed rail 12 was laid down in a counterclockwise direction. It consists of a pair of upper and lower right return rail members 45 and 46. Both return rail members 45, 46 have right-turning left-turning edges 47, 48.
[0020]
FIG. 3 and FIG. 4 show the loading-side switching device 15. The loading-side switching device 15 has a pair of left and right switching rails 51 and 52. The left turning rail 51 includes a pair of left turning rail members 61 and 62 having the same cross-sectional shape as the rail members 31, 32, 35 and 36 such as the feed rails 11 and 12. The left turning rail members 61 and 62 have bent edges 63 and 64. The right pivot rail 52 includes right pivot rail members 65 and 66. The right turning rail members 65 and 66 have bent edges 67 and 68.
[0021]
In FIG. 4, the two switching rails 51, 52 are connected to the two feed rails 11, 12 in a straight line, respectively. In this state, a pair of left and right horizontal rotation shafts 72, 73 supported by a base 71 and extending in the front-rear direction are provided immediately below both the pivot rails 51, 52. A motor 74 (only the left motor is shown in FIG. 3) is connected to rear ends of the rotating shafts 72 and 73. A pair of left and right vertical plate-like arms 75 and 76 are fixed to the two rotation shafts 72 and 73. Left and right pivot carriage notches 77, 78 are provided at the distal ends of both arms 75, 76, and left and right pivot rail members 61, 62, 65, 66 are attached to the opening edges thereof. ing. Near the bases of both arms 75 and 76, left and right rolling carriage feeders 81 and 82 are mounted. The two-point carriage delivery devices 81 and 82 have left and right friction rollers 83 and 84 that are reversibly rotatable. Left and right feed rail side stoppers 85, 86 and return rail side stoppers 87, 88 are provided on both left and right sides of the both rotating shafts 72, 73, respectively.
[0022]
A bogie stopper 91 is provided at the rear end of the pivot rails 51, 52, and a bogie sensor 92 is arranged near the bogie stopper 91.
[0023]
When the rotation shafts 72 and 73 are rotated forward and reverse by driving the motor 74, the arms 75 and 76 are vertically swung together with the rolling rails 51 and 52. When the arms 75 and 76 are brought into contact with the feed rail stoppers 85 and 86, the pivot rails 51 and 52 are connected to the feed rails 11 and 12, and the pivot rails 51 and 52 are connected to the return stopper 87, When brought into contact with 88, the pivot rails 51, 52 are connected to the return rails 13, 14. The swing angle of the arms 75 and 76 during this time is 90 degrees.
[0024]
The unloading-side switching device 16 has the same structure as the loading-side switching device 15, although the front and rear directions are opposite. Although a detailed description thereof is omitted, for convenience, the same reference numerals are given to portions corresponding to the carry-in side roller device 15 in the carry-out side roller device 16 shown in FIG.
[0025]
FIGS. 2 and 3 show the left bogie 17 in detail. The left bogie 17 includes a pair of left and right front traveling rollers 101 and rear traveling rollers 102 supported by left traveling rail members 31 and 32, and a pair of left and right traveling rail members 35 and 36 between the front traveling rollers 101 and the rear traveling rollers 102. And a left feed rail attached to the driven rod 105 suspended between the front and rear brackets 103 and 104 respectively suspended therefrom and the upper surface of the driven rod 105 immediately before the front bracket 103 and immediately after the rear bracket 104. The front and rear guide rollers 106 and 107 sandwiched between the downwardly bent edges 33 and 34 of the members 31 and 32 and the driven rod 105 between the front and rear brackets 103 and 104 pass through the left feed rail members 31 and 32 from the upper surface. The front and rear support members 108 and 109 extend vertically upward.
[0026]
The driven rod 105 has a length slightly larger than the arrangement pitch of the left actual bogie feeder 25, and has a contact surface 111 on the left side with which the friction roller 25a of the feeder 25 is in contact.
[0027]
FIG. 2 shows a carriage 17 lying on the return rails 13 and 14. In this case, the friction roller 26 a of the empty bogie feeder 26 is brought into contact with the bottom surface of the driven rod 105, and this is the contact surface 112.
[0028]
The right bogie 17 has the same structure as the left bogie 17. In the left bogie 17, portions corresponding to the right bogie 17 are denoted by the same reference numerals. The contact surface 113 of the right bogie 17 is formed on the right side of the driven rod 105.
[0029]
As shown in FIG. 3 and FIG. 4, in the loading station I <b> 1, the two transfer rails 51, 52 were connected to the both feed rails 11, 12, respectively, and were respectively mounted on the both transfer rails 51, 52. The transported object W is supported by the carriage 17. In this state, the friction rollers 83, 84 of the point bogie feeders 81, 82 are in contact with the contact surfaces 111, 113. When the roller bogie feeding devices 81 and 82 are driven, the bogie 17 receives forward propulsive force by the friction rollers 83 and 84 and is extruded from both the rails 51 and 52 onto both the feed rails 11 and 12. You. The bogies 17 extruded on both feed rails 11 and 12 are sequentially sent forward on the feed rails 11 and 12 by a plurality of actual bogie feeders 25 and 27.
[0030]
When the bogie 17 is sent to the unloading station I2, the bogie 17 is transferred from the feed rails 11 and 12 to the transfer rails 51 and 52 of the unloading side switch device 16 which is in a standby state while being connected thereto. Transfer. By driving the friction rollers 83, 84 of the point bogie feeders 81, 82 in the forward direction, the bogie 17 is moved forward on the point rails 51, 52, and when the sensor 92 detects the bogie 17, Then, the driving of the carriage delivery devices 81 and 82 is stopped. The carriage 17 stops in contact with the stopper 91.
[0031]
When the conveyed object W is unloaded from the carriage 17, the unloading-side switching device 16 is driven. The pivot rails 51 and 52 supporting the cart 17 are swung together with the arms 75 and 76, and the cart 17 is turned sideways and connected to the return rails 13 and 14. When the friction rollers 83, 84 of the point bogie feeding devices 81, 82 are driven in the opposite direction, the bogie 17 is pushed out of the point rails 51, 52 onto the return rails 13, 14 while the cart 17 is lying down. . The bogie 17 is sequentially fed backward on the return rails 13 and 14 by the plurality of empty bogie feeding devices 26 and 28. When the empty bogie 17 is returned to the loading station I1, the empty bogie 17 is erected by the loading-side switching device 15, and the conveyed object W is placed thereon.
[0032]
FIG. 5 shows the outwardly directed right return rail 14. That is, the right return rail 14 shown in FIG. 5 is obtained by rotating the right return rail 14 shown in FIG. 2 by 180 degrees. In this case as well, the carriage 17 passes under the conveyed object. For example, in the conveyor described in the section of the related art at the beginning, it is necessary to arrange a right return rail as shown by an imaginary line S in FIG. 5, but as compared with this arrangement, the arrangement shown in FIG. It is obvious that the embodiment saves space. Further, in FIG. 5, the friction roller 27a of the right actual bogie feeding device 27 is configured to contact the left side surface of the driven rod 105, and this forms a contact surface 114. Of course, the right return rail 13 may be directed outward.
[0033]
In the above description, the actual bogie feeders 25 and 27 are arranged along the left and right feed rails 11 and 12, but the real bogie feeders are arranged along only one of the left and right feed rails 11 and 12. It may be.
[0034]
Further, in the above embodiment, the feed rail and the return rail are shown as floor conveyors installed on the floor, but the feed rail and the return rail may be installed on the ceiling side to form a ceiling conveyor.
[0035]
【The invention's effect】
According to the present invention, a compact bogie conveyor is provided without requiring a large installation area.
[Brief description of the drawings]
FIG. 1 is a side view of a truck conveyor according to the present invention.
FIG. 2 is a vertical cross-sectional view of the bogie conveyor.
FIG. 3 is a side view of a loading-side switching device of the carriage conveyor.
FIG. 4 is a vertical cross-sectional view of the loading-side point device.
FIG. 5 is a partial vertical cross-sectional view showing a modification of the bogie conveyor.
[Explanation of symbols]
11, 12 feed rails 13, 14 return rails 17 carts 25a to 28a friction rollers 51, 52 point rails

Claims (5)

A plurality of trolleys 17, a pair of left and right feed rails 11 and 12 for running an actual trolley 17 which extends in parallel with each other and on which the article W is laid, and an empty trolley 17 which extends in parallel to each other and parallel to these. In a bogie conveyor having a pair of left and right return rails 13 and 14 to be run, an empty bogie 17 can travel on the return rails 13 and 14 under the same article W. Dolly conveyor featured. On each of the left and right sides, two return rails 13 and 14 are disposed diagonally below the two feed rails 11 and 12, both the feed rails 11 and 12 are upward, and both return rails 13 and 14 are inward or outward. The bogie conveyor according to claim 1, wherein: On each of the left and right sides, two return rails 13 and 14 are disposed diagonally below the inside of both feed rails 11 and 12, both feed rails 11 and 12 are upward, and both return rails 13 and 14 are inward. The bogie conveyor of claim 1. Bogie transfer rolling rails 51 and 52 are disposed at both ends of both the feed rails 11 and 12 and the return rails 13 and 14, respectively. At both ends, a horizontal rotating shaft 72 extending in the rail length direction is provided. The bogie conveyor according to claim 2 or 3, wherein a rolling rail is attached to each of the rails. The bogie 17 has a driven rod 105 extending in the rail length direction, and frictionally engages with the side surface of the driven rod 105 of the bogie 17 on at least one of the feed rails 11 and 12, so that the propulsion force is applied to the bogie 17. The friction rollers 25a and 27a are arranged so as to act on the carriage 17, and the propulsion force can be applied to the carriage 17 by frictionally engaging with the bottom surfaces of the driven rods 105 of the carriage 17 on the return rails 13 and 14, respectively. The truck conveyor according to any one of claims 2 to 4, wherein the friction rollers 26a, 28a are arranged as described above.

Images