JPS6146262B2 - - Google Patents

Description

Detailed Description of the Invention The present invention uses a transfer bar that can move up and down and move forward and backward to transport two workpieces at a time to the next station, and also transport two workpieces at the same time.
This relates to a transport device that changes its posture by turning 90 degrees.

Generally, when transporting two workpieces at a time, it is advantageous to make the pitch between the two workpieces as small as possible at the processing station because the shaft head of the processing unit can be made smaller.

However, when two workpieces are transported close to each other with the longitudinal direction of the workpieces perpendicular to the transport direction, and when the workpieces are rotated 90 degrees midway along the transport line to change their posture, the two workpieces may overlap each other. The two workpieces cannot be rotated at the same time because they will interfere. Therefore, when transporting two workpieces at the same time and turning them 90 degrees,
A large pitch was provided between the works so that even if two works were turned at the same time, they would not interfere with each other, both before and after the station that rotates the workpieces. For this reason, at the station before or after the 90-degree turn, a large pitch between the workpieces is maintained even though it can be narrowed by having a pitch between the workpieces, leading to an increase in the size of the shaft head of the processing unit. This resulted in high costs.

In order to eliminate such problems, the present invention provides a shift device for expanding or reducing the pitch between the works at the station before or at the station after turning the work 90 degrees, and the pitch between the works when the work is turned 90 degrees. is kept large, and the pitch between the works at the station before or at the station after it can be narrowed.

Embodiments of the present invention will be described below based on the drawings.
In FIGS. 1 and 2, reference numerals 10 and 10 denote frames of the transport device, which are mounted horizontally and in parallel by a large number of supports (not shown) erected on the floor. Reference numeral 11 denotes a transfer bar, which is disposed between the pair of frames 10, 10 and is supported so as to be movable up and down and forward and backward (in the transport direction). 1
Reference numeral 2 denotes a swinging arm pivotally supported to be swingable relative to the frame 10. A roller 13 is rotatably supported at the upper end of this swinging arm 12, and the transfer bar 11
A connecting rod 14 is pivotally attached to the lower end of the swing arm 12, and the swing arms 12 are connected to each other so as to swing while maintaining a parallel state. 15 is a cylinder that moves the transfer bar 11 up and down, and the piston rod 16 of this cylinder 15 is connected to the connecting rod 14.
The swing arm 1 is connected to one end via a link (not shown), and moves the connecting rod 14 back and forth in the transport direction.
It is designed to rotate 2. Reference numeral 17 denotes a cylinder that moves the transfer bar 11 forward and backward. A piston rod 18 of this cylinder 17 is connected to the transfer bar 11 via a link (not shown), and allows the transfer bar 11 to move up and down.

Reference numerals 20 and 20 denote a pair of first supports installed on the transfer bar 11, which support two workpieces close to each other in a first posture in which the longitudinal direction of the workpieces is perpendicular to the conveyance direction. It is set in. Reference numerals 21 and 21 denote a pair of second supports provided on the transfer bar 11, which support the workpiece in a second posture state in which the longitudinal direction of the workpiece coincides with the conveyance direction, and which support the workpiece in the first position so as not to interfere with the workpiece. pedestal 2
The pitch _P2 is larger than the pitch _P1 of 0. A pair of movable pedestals 22, 22 are rotatably supported on the transfer bar 11, and are provided between the first pedestals 20, 20 and the second pedestals 21, 21. These movable pedestals 22, 22 are the second pedestal 2.
Provided with a pitch equal to the pitch P ₂ of 1,21,
It is rotated 90 degrees in conjunction with the transfer bar operation to support the workpiece and change the posture of the workpiece from the first posture to the second posture. In order to rotate the movable pedestal 22, swinging rods 23, 23 are connected to the movable pedestals 22, 22, respectively.
The distal end portions of are supported by support portions 24, 24 installed on the frame 10. This support part 24
As shown in FIG. 3, the upper support projection 26 of the rotating body 25 is rotatably supported around a vertical axis.
A bush 27 that fits into the swing rod 23 is rotatably supported by a horizontal support shaft 28. The installation position of this support portion 24 is located at the apex of a right-angled isosceles triangle whose base is the amount of rotation center movement (B ₁ '-C ₁ ·B ₂ -O ₂ ) of the movable pedestal 22. The connecting portion between the swinging rod 23 and the movable pedestal 22 is pivoted by a pivot 30 in a tangential direction in the rotation plane of the movable pedestal 22, and the movable cradle 2
2 is allowed to bend due to the vertical movement of the movable pedestal 2.
Relative rotation with respect to the rotation center of 2 is regulated. As a result, when the movable pedestal 22 is moved by the transport stroke, the swinging rod 23 is rotated 90 degrees using the support portion 24 as a fulcrum, and accordingly, the movable pedestal 22 is also rotated 90 degrees on the transfer bar 11. Ru.

Support members 31, 32, and 33 projecting from the frames 10 and 10 correspond to the respective pedestals 20, 21, and 22 on the transfer bar 11, and support the lower surface of the workpiece. A support stand 31 provided corresponding to the first support stand 20 maintains the workpiece in the first posture and supports the workpiece in the second posture.
A support stand 32 provided corresponding to the pedestal 21 supports the work while maintaining it in the second posture. At the transfer positions B ₁ and B ₂ from the first pedestal 20 to the movable pedestal 22, a shift device 40 is provided for shifting one workpiece to match the pitch of the movable pedestal 22. This shift device 40 is composed of a pair of guide rails 41, 41 fixed to the frame 10, a shift member 42 that can engage and shift a workpiece, and a shift cylinder 43 connected to the shift member 42. has been done. The shift member 42 is provided so as not to interfere with the transfer bar 11 and the movable pedestal 22, and shifts the workpiece located at the rear in the transport direction to the rear by the pitch difference between the first pedestal 20 and the movable pedestal 22. A support member 33 that supports a work located adjacent to the shift device 40 and forward in the transport direction is fixed to the frame 10. This support member 3
3, the shift member 42 is
While the transfer lever 11 is rising, a shift back is performed so that the pitch is _P2 , and while the transfer lever 11 is falling, a shift operation is performed so that the pitch is _P2 .

The operation based on the above configuration will be explained next. Second
As shown in the figure, in the original position state in which the transfer bar 11 is located at the lower end and the rearward end, the support stand 31 on the frame 10 is placed in a pitch relationship corresponding to the first support stand 20 and the second support stand 21. , 32, the support table 33 and the shift device 4
The workpiece shifted by 0 is at pitch P ₂ corresponding to the movable pedestal 22. When the cylinder 15 is actuated to raise the transfer bar 11, the workpiece is supported by each pedestal on the transfer bar and lifted from the support member on the frame.
When the cylinder 17 is actuated to advance the transfer bar, the movable pedestal 22 is rotated and transferred, and the workpieces supported by the other pedestals are also transferred at once. In the transferred state, the first
The work supported on the pedestal 20 corresponds to the B ₁ and B ₂ positions, and the work supported on the movable pedestal 22 is converted from the first attitude to the second attitude and transferred to the C ₂ and C ₁ positions. During this time, the shift member 42 is shifted back and corresponds to the B ₁ to B ₁ position. cylinder 15
When the piston is retracted, the transfer bar is lowered and transferred from each pedestal to the support pedestal on the frame. At the lower end of the transfer bar, the piston of the cylinder 17 is retracted and the transfer bar 11 is retracted. During this backward movement, the shift member 42 is shifted, and the workpiece supported at the B ₁ position is shifted to the B ₁ ' position and returned to the original position shown in FIG. 2. In this way, when converting from the first posture to the second posture, the pitch between the workpieces is widened by the shift device, so even if the workpieces are rotated 90 degrees in conjunction with the conveyance operation, there is no interference between the workpieces, and the workpieces do not interfere with each other. The pitch between the workpieces in one posture can be made as close as possible, and the shaft head for machining the workpiece in the first posture can be downsized.

In the above embodiment, the posture change from the first posture in which the longitudinal direction of the workpiece is perpendicular to the conveyance direction to the second posture in which the workpiece is rotated by 90 degrees is performed in conjunction with the conveyance operation. The pitch between the works is narrowed, and a shift operation is performed to widen the pitch between the works before converting to the second posture.

However, in the case of a transfer device in which the posture of the workpiece before being turned by 90 degrees is the second posture and the posture of the workpiece after being turned by 90 degrees is the first posture, the shift device 40a is shown in FIG. If the workpiece is provided at _{the C2} position as shown in _FIG .

In the first embodiment, the shift device 40 is provided to shift the workpiece at the _B1 position, but it is also effective to shift the workpiece at the _B2 position instead. In the second embodiment, the same effect can be obtained even if the workpiece at the _C1 position is shifted.

As described above, according to the present invention, it is not only possible to eliminate mutual interference between the workpieces even when two workpieces are transported at the same time and the two workpieces are rotated 90 degrees at the same time to change the posture, but also to avoid interference between the workpieces before changing the posture. Since the pitch between the works can be reduced in the station or the subsequent station, this has the practical effect of making it possible to downsize the shaft head of the processing unit.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is a plan view of the main part of the conveyance device, FIG. 2 is a cross-sectional view taken along the arrow in FIG.
A sectional view in the direction of arrows, Fig. 4 is an operation cycle diagram, Fig. 5
The figure shows a second embodiment and corresponds to FIG. 2. 10...Frame, 11...Transfer bar, 1
2... Swinging arm, 14... Connection rod, 15... Cylinder for lifting/lowering, 17... Cylinder for forward/backward movement, 20...
First cradle, 21... Second cradle, 22... Movable cradle, 2
3... Swinging rod, 24... Support part, 31, 32, 33...
Support member, 40, 40a... Shift device, 41... Support rail, 42, 42a... Shift part temple, 43, 4
3a...Shift cylinder.

Claims (1)

[Scope of Claims] 1. In a conveying device that sequentially conveys two workpieces to the next station at the same time using a transfer bar that can move up and down and forward and backward, there is a transfer bar on the transfer bar that is held in a first posture. A pair of first supports simultaneously support two workpieces while maintaining a predetermined pitch; a pair of second pedestals that simultaneously support two workpieces; A pair of movable pedestals that simultaneously support two workpieces at the same pitch as the pitch of the pedestals, and a pair of movable pedestals that rotate around the respective rotation axes of the pair of movable pedestals and are connected to each of the pair of movable pedestals. A rocking rod is provided, and one side of each of the pair of rocking rods is supported so as to be rotatable and movable in the axial direction at the apex of an isosceles right triangle whose base is the transfer stroke of the transfer bar. A pair of supporting parts are installed on the fixed part, and a pair of supporting parts are installed in the fixed part, and the workpieces transported by the first pedestal are transferred to the movable pedestal, or the workpieces transported by the movable pedestal are received by the second pedestal. The conveyance system is characterized in that a shift device is disposed to shift one of the two workpieces, which is the difference in pitch between the workpiece pitch in the first posture and the workpiece pitch in the second posture, at the transfer position to match the pitch between the two workpieces in the second pedestal position. Device. 2 The pitch between the works of the first pedestal that simultaneously supports the two works held in the first posture is
A patent in which the pitch between the two workpieces of a second pedestal that simultaneously supports two workpieces held in a posture is made larger, and the shift device shifts to widen the gap between the two workpieces by the difference in pitch. A conveying device according to claim 1. 3 The distance between the works of the second pedestal that simultaneously supports the two workpieces held in the second attitude is greater than the pitch between the works of the first pedestal that simultaneously supports the two workpieces held in the first attitude. 2. The conveying device according to claim 1, wherein the pitch is smaller, and the shift mechanism is configured to shift to reduce the distance between two workpieces based on the difference in pitch.