JP2014144521A - Workpiece carrier - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a workpiece carrier which can satisfy both of the improvement of workability for a workpiece and the reduction of the spaces the workpiece occupies except the present work time.SOLUTION: A workpiece carrier 1 includes a lower base 11, a one end side upper arm 21 and an another end side upper arm 31 which have a holding parts 23 and 33, a one end side link 22, and an another end side link 32. A plurality of the one end side links 22 and a plurality of the another end side links 32 have a one end lower side hinge part 221, an another end lower side hinge part 321, a one end upper side hinge part 222, and another end upper side hinge part 322. The one end lower side hinge part 221 and the one end upper side hinge part 222, and the another end lower hinge part 321 and the another end upper side hinge part 322 are equal to each other and are arranged in parallel mutually. The one end side upper arm 21 and the another end side upper arm 31 are constituted so as to be movable to a proximity position 101 and a remote position 102.

Description

  The present invention relates to a workpiece conveyance carriage that conveys a workpiece along a conveyance path.

  Conventionally, in a bumper painting line of an automobile, in order to prevent the occurrence of color unevenness in the front bumper and the rear bumper, two workpieces of the front bumper and the rear bumper are conveyed by one workpiece conveying carriage, and these paintings are simultaneously performed. Is going. At this time, in order to coat the painted surfaces of the front bumper and the rear bumper uniformly and uniformly, it is necessary to secure an interval for performing a painting operation between them. However, in the processes other than the painting process, for example, in the standby field, the drying furnace, and the like, the above-described interval is unnecessary, and since this space is created, it is desired to make it smaller.

  In order to ensure a space for performing the painting work between the front bumper and the rear bumper, for example, a work conveyance carriage 9 as shown in FIG. 5 is used. In the workpiece transport carriage 9, the pair of holding portions 92 can be rotated by a hinge mechanism 93. The workpiece transport carriage 9 can keep the interval between the workpieces 901 and 902 small when the workpiece is not painted. In addition, when performing a painting operation on the workpieces 901 and 902, the pair of holding portions 92 are rotated and moved so that the interval between the workpieces 901 and 902 held by the pair of holding portions 92 is increased.

  Moreover, the coating jig shown in Patent Document 1 includes two holding portions, and by operating the operation handle, one holding portion is moved away from the other holding portion along the rail portion. It is configured to be movable.

JP 2004-154617 A

By the way, there are the following problems in the above-mentioned workpiece conveyance carriage and the painting jig.
In the workpiece transport carriage 9, the workpieces 901 and 902 held by the pair of holding portions 92 swing so as to rotate around the rotation axis of the hinge mechanism 93. Therefore, on the upper side of the workpieces 901 and 902, the interval between the workpieces 901 and 902 is widened. On the other hand, on the lower side of the workpieces 901 and 902, the interval between the workpieces 901 and 902 becomes narrow, and the workability deteriorates.

  Therefore, when workers, robots, etc. work on workpieces in a production line such as a painting line, a sufficient working space is secured between the workpieces, and the space occupied by the workpiece is kept small other than during work. For this purpose, further ingenuity is required. This problem cannot be solved even by Patent Document 1.

  The present invention has been made in view of the above-described background, and intends to provide a work conveyance carriage that can improve workability for a work and reduce the space occupied by the work except during this work. Is.

One aspect of the present invention is a work transport carriage that transports a work along a transport path,
A lower base movable on the transport path;
One end side upper arm and the other end side upper arm, which are arranged side by side in the horizontal direction above the lower base and each have a holding portion for holding a workpiece,
One end lower hinge part rotatable relative to the lower base, and one end upper hinge part rotatable relative to the one end upper arm, the one end lower hinge part and the one end upper hinge part, A plurality of one-end-side links arranged at an equal distance from each other and parallel to each other;
The other end lower hinge part rotatable relative to the lower base, and the other end upper hinge part rotatable relative to the other end upper arm, the other end lower hinge part and the other A plurality of links on the other end side, the distances between the upper end hinge portions being equal to each other and arranged in parallel to each other,
The one end-side upper arm and the other end-side upper arm are separated into a close position and a separate position separated from each other by rotation of the plurality of one end side links and the plurality of other end side links. The workpiece conveying cart is configured to be movable (claim 1).

The above-mentioned work transport cart can improve the workability when workers, robots, etc. work on workpieces, and provides a space where workpieces are unnecessary when workers, robots, etc. do not work on workpieces. A state of not occupying.
Specifically, when the one end-side upper arm and the other end-side upper arm are moved to a separation position, the work held by the holding portion of the one end-side upper arm, and the other end-side upper arm, The distance between the work held by the holding part can be increased in both the upper part and the lower part. Thereby, a work space can be ensured in both the upper part and the lower part of each work, and the workability by the worker, robot, etc. for each work can be improved.

  On the other hand, when the one end-side upper arm and the other end-side upper arm are close to each other, the work is held by the holding portion of the one end-side upper arm and is held by the holding portion of the other-end upper arm. The distance between the workpiece and the workpiece can be reduced in both the upper part and the lower part. Thereby, when an operator, a robot, etc. do not work with respect to a workpiece | work, the space which the said workpiece | work occupies can be maintained small.

  Thus, the improvement of workability for the work and the reduction of the space occupied by the work other than at the time of the work, the one end side upper arm is connected to the lower base by a plurality of the one end side links, Further, it is possible to achieve both for the first time by using a so-called parallel link mechanism in which the other end side upper arm is connected to the lower base by a plurality of the other end side links.

  As described above, according to the work conveyance carriage, it is possible to achieve both improvement of workability for the work and reduction of the space occupied by the work except during this work.

The side view of the workpiece conveyance trolley which shows the state which the workpiece | work adjoined in Example 1. FIG. The side view of the workpiece conveyance trolley which shows the state which the workpiece | work separated in Example 1. FIG. The front view of the workpiece conveyance trolley | bogie in Example 1. FIG. The perspective view of the workpiece conveyance trolley | bogie in Example 1. FIG. Explanatory drawing which shows the conventional workpiece conveyance trolley | bogie.

  In the work transport carriage, the lower base is provided with at least one of one end side stopper and the other end side stopper, and the one end side stopper moves the one end side upper arm from the proximity position and the isolation position. The other end side stopper may be configured to be able to hold the other end side upper arm in the proximity position and the isolation position (claim 2). In this case, the one end side stopper or the other end side stopper can be shared by the proximity position and the separation position. Thereby, positioning of the said one end side upper arm and the said other end side upper arm can be performed reliably, simplifying.

  In addition, the one end-side upper arm and the other end-side upper arm are placed on the one end side stopper and the other end side stopper, respectively, at the close position and the separated position. . Thereby, for example, when painting is performed in the painting step, it is possible to prevent the paint from adhering to the one end side stopper and the other end side stopper. Thereby, it can prevent that the coating material adhering on these stoppers dries and peels, and adheres to a workpiece | work.

  The workpiece transport carriage transports a workpiece on a transport path disposed in a painting line for painting the workpiece, and when painting the workpiece, the one end side upper arm and the other end side upper arm are When the workpiece is stored or transported to a separation position, and when the coated workpiece is dried, the one end-side upper arm and the other end-side upper arm may be moved to the proximity position. Item 3). When painting a workpiece on the painting line, it is necessary to provide a space for performing a painting operation between the workpieces. On the other hand, when storing, transporting and drying other than when painting, the space between the workpieces can be made as small as possible, and the space occupied by the workpieces can be reduced. According to the workpiece conveyance carriage, the workpiece can be conveyed in an optimal state in any of the above-described scenes.

Example 1
The Example concerning the said workpiece conveyance trolley is demonstrated with reference to FIGS. 1-4.
As shown in FIG. 1, the workpiece conveyance carriage 1 conveys the workpieces 51 and 52 along the conveyance path 60. The workpiece transport carriage 1 is arranged with the lower base 11 and the holding arms 23 and 33 for holding the workpieces 51 and 52, which are arranged side by side in the horizontal direction above the lower base 11. A side upper arm 31, two one end side links 22, and two other end side links 32 are provided.

  As shown in FIG. 1, the two one end side links 22 have one end lower hinge part 221 that can be rotated with respect to the lower base 11 and one end upper hinge part 222 that can be rotated with respect to the one end side upper arm 21. The distance between the lower end hinge part 221 and the upper end hinge part 222 is equal to each other and is arranged in parallel to each other. The two other end side links 32 have a lower end lower hinge portion 321 that can rotate with respect to the lower base 11 and an upper end hinge portion 322 that can rotate with respect to the upper end 31 of the other end side. The distance between the lower hinge portion 321 at the other end and the upper hinge portion 322 at the other end is equal to each other and is arranged in parallel to each other.

  As shown in FIGS. 1 and 2, the one-end-side upper arm 21 and the other-end-side upper arm 31 are close to each other by the rotation of the two one-end links 22 and the two other-end links 32. 101 and a separation position 102 spaced apart from each other.

This will be described in more detail below.
The workpiece conveyance carriage 1 of this example conveys the two workpieces 51 and 52 in the painting line which coats the workpieces 51 and 52. The workpieces 51 and 52 in this example are a front bumper 51 and a rear bumper 52 of an automobile as shown in FIGS.

As shown in FIGS. 1 and 3, a transport path 60 is formed in the painting line, and a drive conveyor 61 and a rail 62 are arranged under the floor of the transport path 60.
The painting line is arranged in a waiting area where a plurality of workpiece transfer carts 1 are arranged, a mounting process in which the workpieces 51 and 52 are mounted on the workpiece conveyance cart 1, a painting process in which the workpieces 51 and 52 are painted, and a coating process after each painting process. A drying process.

  As shown in FIGS. 1 and 3, the drive conveyor 61 disposed in the transport path 60 is disposed along the transport path 60 throughout the entire area. Moreover, the drive conveyor 61 consists of a chain conveyor which can convey the workpiece | work conveyance trolley 1 continuously, and drives the endless conveyor chain 611 formed cyclically | annularly by the drive source which is not shown in figure. The driving force of the driving conveyor 61 is transmitted to the work conveying cart 1 by engaging the driving pusher portion 612 provided at an endless conveyor chain 611 with a predetermined pitch and the engaging portion 132 of the workpiece conveying cart 1. Is done.

  As shown in FIG. 1 and FIG. 3, the rail 62 is arranged over the entire area along the conveyance path 60 above the drive conveyor 61, and is divided by two divided rails 621 having a substantially U-shaped cross-sectional shape. It is configured. The rail 62 has a substantially U-shaped opening side that forms a cross-sectional shape of the two divided rails 621 facing each other, and the work conveyance carriage 1 has a gap formed by being arranged at a predetermined interval. The traveling unit 13 is configured to be able to travel.

As shown in FIGS. 1 and 3, the work conveyance carriage 1 that moves along the conveyance path 60 includes a lower base 11 that moves on the above-described rail 62, one end-side upper arm 21 that is disposed above the lower base 11, and And an upper arm 31 on the other end side.
The lower base 11 is disposed in a traveling unit 13 configured to be able to travel on the rail 62, and is disposed on an upper portion of a column 133 that is erected from the traveling unit 13. The traveling unit 13 includes a pair of left and right traveling wheels 131 disposed at front and rear positions in the transport direction, and an engaging unit 132 that is disposed below the traveling unit 13 and engages with the drive pusher unit 612.

  As shown in FIGS. 1 and 3, the lower base 11 is transported from both ends of the beam member 111 and the beam member 111 arranged so as to extend from the upper end portion of the column 133 toward both sides in the lateral direction perpendicular to the traveling direction. And a pair of base frames 112 extending toward the front and rear of the path 60.

  As shown in FIGS. 1 and 3, one end side on which one end side upper arm 21 and one end side upper arm 21 connected via two one end side links 22 are placed on one end side of the pair of base frames 112. Stoppers 41 are connected to each other. Further, the other end side upper arm 31 connected via two other end side links 32 and the other end side stopper 42 are respectively connected to the other end side of the pair of base frames 112. In this example, the one end side link 22 and the other end side link 32, the one end side upper arm 21 and the other end side upper arm 31, the one end side stopper 41 and the other end side stopper 42 have the same shape and are in the traveling direction. They are arranged horizontally. In this example, the description of the one end side link 22, the one end side upper arm 21 and the one end side stopper 41 also serves as an explanation of the other end side link 32, the other end side upper arm 31 and the other end side stopper 42.

  As shown in FIG. 1, the two one end side links 22 (32) are connected to one end lower hinge part 221 (321) that can be rotated with respect to one end of the lower base 11, and one end side upper arm 21 (31). One end upper hinge part 222 (322) which can be rotated is provided. Each one end side link 22 is connected to the lower base 11 via one end lower hinge part 221 and is connected to one end side upper arm 21 via one end upper hinge part 222. At this time, the distance between the lower end hinge part 221 and the upper end hinge part 222 is equal to each other and arranged parallel to each other. Thereby, by rotating the two one end side links 22 with respect to the lower base 11, the one end side upper arm 21 can be moved between the proximity position 101 and the separation position 102 without being inclined. .

  As shown in FIG. 1, each one-end-side upper arm 21 is provided with a holding portion 23 (33) for holding a work 51 (52), the longitudinal direction of which is horizontally arranged along the transport direction. The total length of the one end side upper arm 21 is set to be longer than the distance between the one end upper hinge portions 222 in the two one end side links 22 connected to the one end side upper arm 21. Moreover, each one end side upper arm 21 is connected so that it can move integrally by the connection pipe 24 (34), as shown in FIG.

  As shown in FIGS. 1 and 3, the holding portion 23 that holds the workpiece 51 includes a holding pin 331 (331) that stands upward from each upper arm 21 on one end side, and a holding jig that spans between the holding pins 231. It consists of a tool 232 (332). The holding jig 232 is configured to be connectable to the holding pin 231, and is formed along the back surface of the workpiece 51.

  As shown in FIGS. 1 and 3, one end side stopper 41 (42) disposed on one end side of the lower base 11 is provided on a bracket 411 (421) standing upward from each base frame 112 and on the side surface of the bracket 411. And a pad 412 (422) on which the upper arm 21 at one end is placed. Moreover, the one end side stopper 41 is arrange | positioned in the range which the locus | trajectory of the one end side upper arm 21 in the proximity position 101 and the separation position 102 overlaps as shown in FIG.1 and FIG.2. Therefore, the one end side upper arm 21 can be placed on the one end side stopper 41 in both the proximity position 101 and the separation position 102.

Next, the effect in this example is demonstrated.
When the worker, the robot, etc. work on the workpieces 51, 52, the work transport carriage 1 can improve the workability, and when the worker, the robot, etc. do not work on the workpieces 51, 52, A state is formed in which the workpieces 51 and 52 do not occupy unnecessary space in the direction along the conveyance path 60.
Specifically, when the one end-side upper arm 21 and the other end-side upper arm 31 are moved to the separation position 102, the workpieces 51 and 52 held by the holding portion 23 of the one-end-side upper arm 21 and the other end-side upper The distance between the workpieces 51 and 52 held by the holding portion 33 of the arm 31 can be increased in both the upper part and the lower part. Thereby, a work space can be secured in both the upper and lower portions of the workpieces 51 and 52, and the workability of the workers, robots, etc. for the workpieces 51 and 52 can be improved.

  On the other hand, when the one-end-side upper arm 21 and the other-end-side upper arm 31 are in the proximity position 101, the workpieces 51 and 52 held by the holding portion 23 of the one-end-side upper arm 21 and the other-end-side upper arm 31 are held. The distance between the workpieces 51 and 52 held in the portion 33 can be kept small in both the upper part and the lower part. Thereby, when an operator, a robot, or the like does not work on the workpieces 51 and 52, the space occupied by the workpieces 51 and 52 in the direction along the transfer path 60 can be kept small.

  Thus, the improvement of workability with respect to the workpieces 51 and 52 and the reduction of the space occupied by the workpieces 51 and 52 in the direction along the G transport path 60 other than during this operation include the one-end-side upper arm 21 By using a so-called parallel link mechanism in which the one end side link 22 is connected to the lower base 11, and the other end side upper arm 31 is connected to the lower base 11 by two other end side links 32, It can be achieved for the first time.

  In addition, the lower base 11 has one end side stopper 41 placed when the one end side upper arm 21 is in either the proximity position 101 or the separation position 102 and the other end side upper arm 31 is arranged in the proximity position 101 or the separation position. The other end side stopper 42 to be placed in any of the positions 102 is provided. Therefore, the one end side stopper 41 or the other end side stopper 42 can be shared by the proximity position 101 and the separation position 102. Thereby, positioning of the one end side upper arm 21 and the other end side upper arm 31 can be performed reliably while simplifying.

  Also, the upper end arm 21 and the upper end arm 31 on the other end are mounted on the stopper 41 on the one end side and the stopper 42 on the other end side, respectively, in the proximity position 101 and the separation position 102. . Thereby, it can prevent that a coating material adheres on the one end side stopper 41 and the other end side stopper 42, when it coats in a painting process. Thereby, it can prevent that the coating material adhering on these stoppers dries and peels, and adheres to the workpiece | work 51,52.

  Also, the workpieces 51 and 52 are transported in the painting line 6 for painting the workpieces 51 and 52. In the painting process, the one end side upper arm 21 and the other end side upper arm 31 are moved to the separation position 102, and the painting process. In other steps, the one end side upper arm 21 and the other end side upper arm 31 are moved to the proximity position 101. When painting the workpieces 51 and 52 in the painting line 6, it is necessary to provide a space for performing a painting operation between the workpieces 51 and 52. On the other hand, when storing, transporting and drying other than when painting, it is possible to reduce the space between the workpieces 51 and 52 as much as possible and reduce the space occupied by the workpieces 51 and 52 in the direction along the transport path 60. it can. According to the workpiece conveyance carriage 1, the workpieces 51 and 52 can be conveyed in an optimal state in any of the above-described scenes.

  As described above, according to the workpiece transfer carriage 1, both the improvement of workability for the workpieces 51 and 52 and the reduction of the space occupied by the workpieces 51 and 52 in the direction along the transfer path 60 other than during this operation are achieved. Can be made.

  In the first embodiment, the work transport carriage is moved by the drive conveyor. However, the present invention is not limited to this, and the work transport carriage itself may have a drive source and can be self-propelled, or a conveyor other than the chain conveyor. May be used.

  Moreover, although the one end side upper arm and the other end side upper arm are arranged at one end and the other end of the lower base, they are not limited thereto. For example, it can be arranged on the center side of the lower base or on a part of a base frame formed in an annular shape.

  Further, an interlocking mechanism that automatically moves when one of the one end-side upper arm and the other end-side upper arm is moved may be provided. When this interlocking mechanism is provided, it is only necessary to provide at least one of the one end side stopper or the other end side stopper.

DESCRIPTION OF SYMBOLS 1 Work conveyance truck 101 Proximity position 102 Separation position 11 Lower base 21 One end side upper arm 22 One end side link 221 One end lower hinge part 222 One end upper hinge part 23, 33 Holding part 31 Other end side upper arm 32 Other end side link 321 The other end lower hinge 322 The other end upper hinge 41 One end side stopper 42 The other end side stopper 51, 52 Work 6 Coating line 60 Conveyance path

Claims (3)

A workpiece transport carriage for transporting a workpiece along a transport route,
A lower base movable on the transport path;
One end side upper arm and the other end side upper arm, which are arranged side by side in the horizontal direction above the lower base and each have a holding portion for holding a workpiece,
One end lower hinge part rotatable relative to the lower base, and one end upper hinge part rotatable relative to the one end upper arm, the one end lower hinge part and the one end upper hinge part, A plurality of one-end-side links arranged at an equal distance from each other and parallel to each other;
The other end lower hinge part rotatable relative to the lower base, and the other end upper hinge part rotatable relative to the other end upper arm, the other end lower hinge part and the other A plurality of links on the other end side, the distances between the upper end hinge portions being equal to each other and arranged in parallel to each other,
The one end-side upper arm and the other end-side upper arm are separated into a close position and a separate position separated from each other by rotation of the plurality of one end side links and the plurality of other end side links. A work conveyance cart characterized by being configured to be movable.   2. The work transfer carriage according to claim 1, wherein at least one of one end side stopper and the other end side stopper is disposed on the lower base, and the one end side stopper moves the one end side upper arm closer to the first base side. The workpiece conveyance is configured to be able to be held at the position and the isolation position, and the other end side stopper is configured to be able to hold the other end side upper arm at the proximity position and the isolation position. Trolley.   3. The workpiece conveyance carriage according to claim 1 or 2, wherein the workpiece conveyance carriage conveys the workpiece on a conveyance path disposed in a painting line for painting the workpiece, and when the workpiece is painted, the upper side of the one end is above. When the arm and the other end side upper arm are moved to the separation position, and when the work is stored or transported and when the coated work is dried, the one end side upper arm and the other end side upper arm are A workpiece transport cart characterized by being moved to a close position.

Images