JP2001277065A - Turning device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To arrange plural works with a space causing no interference with each other when turning them and allowing them to come close to each other in a working station. SOLUTION: Plural receivers 4a and 4b for supporting a work and to be rotated in a horizontal surface are provided with a required space S1 in the longitudinal direction of a transfer bar 1. A first and a second receiver arms 5a and 5b having turning support points 8a and 8b to be turned in the same direction with the forward and backward moving direction of the transfer bar 1 and to be rocked in the vertical direction and to be moved forward and backward in the axial direction are connected to the receivers 4a and 4b. The receiver 4b is provided with a means formed of a pinion 11 and a rack 12 for coming close and separating to/from each other. When the transfer bar 1 is moved forward, the second receiver 4b is turned at 90 degree so as to be in parallel with the first receiver 4a and comes close to the first receiver 4a with a space S3, and when the transfer bar 1 is moved backward, the second receiver 4b is turned at 90 degree so as to be in the same direction with the first receiver 4a and separated from the first receiver 4a with the space S1.

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a turning device for transferring a plurality of workpieces simultaneously to a processing station of one machine tool by using a transfer device by converting the workpiece into a processing position. It is about. 2. Description of the Related Art In a transfer machine, there is a case where a workpiece is turned by 90 ° when it is transported to a processing station by a transfer device. As shown in a plan view and a cross-sectional view of FIG. 6, a conventional swivel device has a bearing member 10 supporting a rotating shaft 13 fixed to a transfer bar 1, supports a workpiece W, and can only rotate in a horizontal plane. One receiving table 4 is provided, and can vertically swing with a pivot point 8 in the same direction as the moving direction of the transfer bar 1 at a side position with respect to the moving direction of the transfer bar 1 and can move in the axial direction. This is a configuration in which a cradle arm 5 that can move forward and backward is connected to the cradle 4. As shown by a solid line in FIG. 6, the conventional swivel apparatus has a transfer bar 1 for transporting a workpiece W supported on a receiving table 4 in front of a processing station to the processing station.
The cradle 4 is moved by the cradle arm 5 to 9
The workpiece W is turned at 0 ° in the machining station, and the posture of the workpiece W is changed so that the machined surface thereof corresponds to a machine tool (not shown). [0004] In the above-mentioned conventional turning device, only one work piece can be transferred to the processing station, and there is a limit to improvement in work efficiency. In the case of machining two workpieces, two turning devices are required. However, when the interval between the workpieces is narrow, the turning trajectories of adjacent workpieces overlap during the turning, so that the workpieces interfere with each other. By increasing the distance between adjacent workpieces, interference between the workpieces can be avoided, but there is a problem in that the larger the distance, the larger the machine tool. SUMMARY OF THE INVENTION The present invention is directed to a work station in which a plurality of workpieces are rotated and turned while maintaining a sufficient distance without interference, and adjacent workpieces are arranged close to and away from each other at a processing station. It is an object of the present invention to solve the above-mentioned conventional problems. In order to achieve the above object, the present invention provides a first cradle which supports a workpiece and can only rotate in a horizontal plane, and the first cradle by rotating. A plurality of pedestals with a second pedestal that can approach and separate the parallel space are provided at required intervals in the longitudinal direction of the lift-and-carry type transfer bar, and connected to the respective pedestals, A plurality of pedestal arms having a pivot point for pivoting in the same direction as the transfer bar reciprocating movement direction at the side position, capable of vertically swinging, and capable of axially reciprocating; Means for moving the cradle closer to and away from the cradle, wherein the first and second cradles are turned 90 ° by the forward and backward movement of the transfer bar, and the second cradle is moved relative to the first cradle. It is characterized by approaching and separating To. Means for moving the second receiving table toward and away from the first receiving table includes providing a pinion on a rotation shaft of the second receiving table, and extending a rack meshed with the pinion in the longitudinal direction of the transfer bar. It is characterized by having been provided. [0008] The fulcrum of the cradle arm connected to the second cradle may have a phase difference behind the fulcrum of the cradle arm connected to the first cradle. Embodiments of the present invention will be described below with reference to the drawings. In FIG. 1, reference numeral 1 denotes a lift-and-carry transfer bar, as shown in FIG.
This is a known transfer device in which a swing arm 15 which moves forward and backward and moves up and down by a cylinder 14 and a roller 16 attached to an upper end of the swing arm 15 operate to ascend, advance and descend and retreat. Reference numeral 2 denotes a machine tool, and 3 denotes a jig in a processing station, which is installed in front of the machine tool 2 and positions and supports a workpiece conveyed by the transfer bar 1. According to the present invention, the first cradle 4a supporting the workpiece W1 and the second cradle 4b supporting the workpiece W2 can be rotated in a horizontal plane at a required interval S1 in the longitudinal direction of the transfer bar 1. To be provided. As a rotating mechanism, as shown in FIG. 2, a bearing member 10 supporting the rotating shafts 13a and 13b is provided.
a, 10b, and the bearing member 10a of the first receiving stand 4a is fixed to the transfer bar 1 and can only rotate.
The bearing member 10b of the second cradle 4b is movable in the longitudinal direction with respect to the transfer bar 1 and is provided with means for moving the first cradle 4a closer to or farther from the first cradle 4a. As means for approaching and separating the second receiving table 4b, as shown in FIGS. 3 and 4, a guide member 17 is fixed to the transfer bar 1 in the longitudinal direction thereof.
The guide member 17 slidably guides the bearing member 10b of the second receiving table 4b, and the pinion 11 is provided on the rotating shaft 13b of the second receiving table 4b.
2 is fixed to the transfer bar 1 in parallel with the guide member 17. First and second pedestal arms 5a, 5b are connected to the twelfth pedestal 4a, 4b, respectively. As shown in FIG. 1, the first and second receiving arms 5a and 5b are mounted on a base 6 provided at a position lateral to the direction of movement of the transfer bar 1 in the same direction as the direction of movement of the transfer bar 1. Fulcrums 8a and 8b so as to be turned in parallel to each other, and are provided in parallel. The rear ends of the first and second receiving arms 5a and 5b are held by the first and second receiving arms 5 by holders 7a and 7b.
a and 5b are supported so as to be able to swing vertically and to be able to advance and retreat in the axial direction, and the ends of the first and second pedestal arms 5a and 5b are connected to one end of the first pedestal 4a and the second pedestal 4b. Are connected via joints 9a and 9b rotatable about a horizontal axis. In addition, the turning fulcrums 8a and 8b of the first and second cradle arms 5a and 5b are connected to the second cradle 4b by connecting the fulcrum 8b of the second cradle arm 5b to the first cradle 4a. A phase difference L is provided behind the turning fulcrum 8a of the one receiving arm 5a. Next, the operation of the apparatus of the present invention having the above configuration will be described. The two workpieces W1 and W2 are transported in front of the workpiece processing station with their longitudinal directions being the same as the longitudinal direction of the transfer bar 1, and the first and second receiving tables 4a and 4b receiving the workpieces are received. The workpiece W has a longitudinal direction as shown by a solid line in FIGS. 1 and 5.
1, W2 stands by in the same direction, and the workpiece W1 is received on the first receiving tray 4a and the workpiece W2 is received on the second receiving tray 4b. The workpieces W1 and W2 received on the first and second receiving tables 4a and 4b have pins protruding from the first and second receiving tables 4a and 4b opened in the workpieces W1 and W2. The positioning is performed by fitting into the positioning holes. To transfer the workpieces W1 and W2 to the processing station, the transfer bar 1 moves up and moves forward. Accordingly, the workpieces W1, W2 on the first and second receiving tables 4a, 4b also move up and move forward to transport the workpieces W1, W2 to the processing station, and
The workpieces W1, W2 are transferred onto the jig 3 from the first and second receiving tables 4a, 4b by the lowering of the workpieces. In the process of transporting the workpieces W1 and W2 from the standby position to the processing station, the workpieces W1 and W2 pass through the first and second receiving tables 4a and 4b. ° The work W is turned and turned, and the workpiece W is on the second receiving table 4b.
Numeral 2 is paralleled to the workpiece W1 on the first receiving table 4a and is moved closer to the workpiece W1. The above operation will be described with reference to FIG. Workpiece W
1. At the position where the transfer of W2 is waiting, the first and second receiving tables 4
a, 4b are arranged in cascade at a wide interval S1 with their longitudinal direction being parallel to the longitudinal direction of the transfer bar 1.
As the transfer bar 1 moves up and moves forward, the first and second receiving tables 4a and 4b also move up and move forward,
The first and second pedestal arms 5a, 5b follow this, and move in the direction of the processing station 9 around the respective pivot points 8a, 8b.
The first and second cradles 4a and 4b are rotated by 90 degrees. At this time, the first receiving table 4a is only rotated, but the second receiving table 4b is moved toward the first receiving table 4a by the pinion 11 meshing with the rack 12 simultaneously with the rotation.
When the first and second receiving arms 5a and 5b are turned at an angle perpendicular to the transfer bar 1, the first and second receiving arms 4a and 4b
b rotates 45 °, and further rotates 45 °. At this time, the interval S2 between the first and second receiving tables 4a and 4b is narrow,
First at a position where the workpieces W1 and W2 are waiting to be transported,
Since the interval S1 between the two receiving tables 4a and 4b is widened, the turning trajectories of the workpieces W1 and W2 do not overlap even at the interval S2, and there is a sufficient interval between the workpieces W1 and W2. , And further rotated by 45 °. When the first and second receiving arms 5a and 5b are turned at an angle orthogonal to the transfer bar 1, the turning fulcrums 8a and 8b
b and the distance between the first and second cradles 4a and 4b are the shortest, but this is absorbed by the first and second cradle arms 5a and 5b retreating in the axial direction. Further, the transfer bar 1 moves forward and the first and second receiving tables 4a and 4b are moved to the jig 3 of the processing station.
Above, the 1st and 2 receiving stand 4a, 4b will be in the state which turned 90 degree | times, and the 2nd receiving stand 4b will be brought close to the 1st receiving stand 4a, and will be the space | interval S3 which approached most. In this state, the workpieces W1 and W2 on the first and second receiving tables 4a and 4b are transferred to the jig 3 by the lowering of the transfer bar 1 and positioned on the jig 3 and processed by the machine tool 2. Therefore, the close interval S
3, two workpieces W1 positioned in parallel on the jig 3;
W2 can be processed by the narrow machine tool 2 without using a large machine tool. The first receiving part, in which the fulcrum 8b of the second receiving arm 5b is connected to the first receiving base 4a, the turning fulcrum 8a, 8b of the first and second receiving arm 5a, 5b is connected to the second receiving base 4b. The reason why the phase difference L is provided behind the turning fulcrum 8a of the platform arm 5a is that both the first and second cradle arms 5a and 5b rotate the first and second cradles 4a and 4b by 90 °. The turning angles of the first and second receiving arms 5a and 5b need to be 90 ° in order to turn the workpieces W1 and W2 by 90 °. However, the second cradle 4b is moved closer (approaching).
Therefore, in order to keep the turning angle of the second receiving arm 5b at 90 °, it is necessary to absorb the width shift amount. That is, when the turning fulcrum 8b of the second receiving arm 5b is located on the same line as the turning fulcrum 8a of the first receiving arm 5a, the turning angle of the second receiving table 4b is larger than 90 ° by the width shift amount. Since the turning angle of the second receiving stand 4b is rotated by 90 ° or more, the turning fulcrum 8b of the second receiving arm 5b is provided with a phase difference L behind the turning fulcrum 8a of the first receiving arm 5a. The swivel angle of the second pedestal arm 5b is maintained at 90 ° by absorbing the width of the second cradle 4b. Workpiece W on the first and second receiving tables 4a and 4b
After the transfer bars 1 and W2 have been transferred to the jig 3, the transfer bar 1 moves backward to its original position in a lowered state, and rises at the retreat end to prepare for the conveyance of the next workpieces W1 and W2. When the transfer bar 1 moves backward, the first and second receiving trays 4a and 4b perform the reverse operation of the forward movement of the transfer bar 1, and at the original position of the backward moving end, the first and second receiving trays 4a and 4b are 90 °. The direction has been changed and the first and second cradles 4a, 4b
Is a wide interval S1. That is, when the transfer bar 1 is moved forward, the first receiving stand 4a rotates 90 °, but the second receiving stand 4b rotates 90 ° and simultaneously the width shifting mechanism by the pinion 11 and the rack 12 increases the width. The second receiving stand 4b moves in a direction away from the first receiving stand 4a to have a wide interval S1. In the above embodiment, two cradles are used, one of which is for rotation only, and the other cradle is capable of rotation, approach, and separation. It is also possible to arrange a cradle on each side of the cradle that enables rotation, approach and separation, and transport three workpieces. As described above, according to the present invention, at least two workpieces can be moved without interference between the workpieces.
It is possible to change the direction by 0 ° and move the two workpieces closer to each other, or to transport them to the processing station, or expand the distance between the two closer workpieces to the processing station and place them on the jig. And Therefore, there is an advantage that machining of two workpieces can be performed without requiring a large machine tool, and machining efficiency can be improved.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a plan view of the device of the present invention. FIG. 2 is a side view of the device of the present invention. FIG. FIG. 5 is a view showing a receiving table and a jig which can be rotated and shifted in width in the apparatus of the present invention. FIG. 5 is a plan view for explaining the operation of the apparatus of the present invention. FIG. 6 is a plan view of a conventional turning device and rotation of a workpiece. Diagram showing state [Description of reference numerals] 1 transfer bar 2 machine tool 3 jig 4a first receiving stand 4b second receiving stand 5a first receiving arm 5b second receiving arm 6 base 8a of first receiving arm Supporting point 8b Supporting point 10a of second receiving arm 10a Bearing member 10b Bearing member air passage 11 Pinion 12 Rack 13a Rotating shaft 13b Rotating shaft 17 Guide member

Claims (1)

Claims: 1. A first receiving stand supporting a workpiece and capable of rotating only in a horizontal plane, and a second receiving stand capable of approaching and separating a parallel space from the first receiving stand by a rotating operation. A plurality of pedestals with the pedestal are provided at required intervals in the longitudinal direction of the lift-and-carry type transfer bar, and are connected to the respective pedestals and at the side positions of the transfer bar in the same direction as the transfer bar moving forward and backward. A plurality of pedestal arms having a fulcrum that can be pivoted up and down and capable of swinging up and down, and a means for moving the second cradle closer to and away from the first cradle; The turning of the first and second cradles by 90 ° by moving the transfer bar forward and backward, and the second cradle approaches and separates from the first cradle. apparatus. 2. The swivel device according to claim 1, wherein the means for moving the second cradle toward and away from the first cradle includes a pinion provided on a rotation shaft of the second cradle, and the pinions mesh with each other. A swivel device characterized in that a rack is provided extending in the longitudinal direction of the transfer bar. 3. The turning device according to claim 1, wherein a pivot point of the cradle arm connected to the second cradle is shifted backward from a pivot point of the cradle arm connected to the first cradle. A turning device characterized by having