JP4778165B2 - Transfer feeder - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a mechanism of a transfer feeding device that performs conveyance between a plurality of processes in the manufacturing process of parts and materials.
[0002]
[Prior art]
The transfer feeder is used to sequentially convey materials and parts to a predetermined position over a certain distance. In FIG. 1, the material 2 or part 3 is held by the finger 2 attached to the transfer bar 1, transported to the next process, the finger is opened at that position, the transported material or part is placed, and the finger returns to the initial position. . After holding, the finger can be moved upward to lift the material and parts from the tool. Basically, the following three-dimensional operations are performed to achieve the purpose of conveyance. An operation of holding and releasing the material and the part (Y direction), an operation of floating the material and the part (Z direction), and an operation of conveying to a predetermined position (X direction).
[0003]
The drive unit for each operation is composed of a servo motor and a nut unit that converts the rotational motion of the ball screw into a linear motion and a slide mechanism that regulates the linear motion with high accuracy. The momentum of each predetermined operation is controlled by controlling the rotation angle of the servo motor.
[0004]
FIG. 2 shows an example of a press equipped with a transfer feeder according to the prior art. It comprises a drive unit 4 for conveyance operation (X direction), a drive unit 5 for holding and releasing operation (Y direction), and a drive unit 6 for vertical operation (Z direction).
FIG. 3 shows a drive unit 5 for holding and releasing operations (Y direction) and a drive unit 6 for up and down operations (Z direction).
The screw shaft 8 driven by the servo motor 7 with different left and right screw directions is rotated forward and backward to expand and contract the distance between the left and right nuts 9 and change the angle of the link 10 to drive the holding and releasing operations. The entire unit 5 is moved in the vertical direction, and the transfer bar 1 is moved in the vertical direction via the conveying slide guide 11.
[0005]
[Problems to be solved by the invention]
The drive unit composed of a slide mechanism that regulates the linear motion and the rotational motion by screws and nuts driven by the servo motor and the slide mechanism that regulates the linear motion are large in size and weight. There is no high speed operation. Dust and foreign matter in the air are likely to enter the sliding part, and the life of the mechanical parts is short and maintenance is expensive.
With only two sets of links of the vertical movement drive unit, two sets of post guides are necessary because there are insufficient restraint conditions for horizontally regulating the drive unit of the holding and releasing operation at the top.
[0006]
[Means for Solving the Problems]
The vertical movement of the rotation angle is used for the vertical movement by swinging the link without converting the rotational movement by the servo motor into the linear movement by the screw.
[0007]
The mechanism elements of the holding / release operation drive unit and the above-described up / down operation drive unit are mutually utilized to form an integrated structure.
[0008]
Therefore, the transfer processing apparatus for press working according to the present invention includes a first servo motor (15), a rotary shaft connected to the first servo motor, a second servo motor (23), and the second servo motor. A screw shaft (24) connected to a servo motor and provided with a pair of right and left screws on the left and right sides, a gear (16) fixed to the rotating shaft, and the screw shaft (24) meshing with the gear (16). , A rotatable gear (17) provided on the gear (17), a gear (18) that meshes with the gear (17) and is rotated by the gear (16) via the gear (17), and the gear (18) is fixed. A first spline shaft (19) and a pair of left and right second spline shafts coaxial with the first spline shaft, each having a recess provided around each of the second spline shaft ( 20, 20) and that Is a pair of left and right forward and reverse nuts on the screw shaft, each having a convex portion that engages with the concave portion of the second spline shaft, and reciprocatingly moves when the screw shaft rotates. Nuts (25, 25) that do not rotate when the second spline shaft rotates, and swing links (21, 21) attached to the respective ends of the second spline shaft. ) And the movement of the rotary shaft, the gears (16, 17, 18) and the first spline shaft (19) connected to the peristaltic link and driven by the first servo motor. When the second servo motor is driven, the screw shaft (24), the nuts (25, 25), and the second spline shaft (20) are moved by moving the swing link. Through the swing link (21 Each of the transfer bar (1) that is held and released by sliding in the axial direction, and the rotation shaft, the screw shaft (24), and the pair of left and right second spline shafts (20, 20) are rotatable. Bearing portions to be supported, the rotary shaft, the screw shaft (24) and the gears (16, 17, 18), the first and second spline shafts (19, 20, 20) and the nuts (25, 25) And a lubricating oil tank (26) immersed in the lubricating oil. The bearing portion is provided with an oil seal that prevents oil leakage due to the rotational movement of the rotating shaft and the screw shaft and the axial movement of the second spline shaft.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described based on examples with reference to the drawings.
FIG. 4 shows an example of the implementation of the present invention. The transfer feeding device equipped in the press has a structure in which a driving unit 12 for conveying operation (X direction), a driving unit 13 for holding and releasing operation (Y direction), and a driving unit 14 for vertical operation are integrated.
[0010]
FIG. 5 shows the structure of the integrated drive unit. In the vertical drive unit, the servomotor 15 drives the rotary shaft and the gears 16, 17, and 18 to drive the spline shafts 19 and 20. The rotary shaft 22 incorporated in the swing link 21 attached to the spline shaft 20 transmits the vertical movement of the swing link 21 to the transport slide guide 11 and moves the transfer bar 1 up and down.
[0011]
As shown in FIG. 4, the conveying slide guide 11 is supported by the integrated driving units 13 and 14 that are mounted on both sides of the press for vertical movement, holding, and opening, and is transmitted in the vertical direction transmitted from the swing link 21. By the operation, the slide guide 11 can move up and down while maintaining the level.
[0012]
On the other hand, in the driving unit for holding and releasing operation, the screw shaft 24 provided with a pair of forward and reverse screws on the left and right is rotated by the servo motor 23, and the spline shaft 20 is slid in the left and right directions by the pair of left and right nuts. The holding and releasing operations are transmitted to the swing arm 21, the transport slide guide 11, and the transfer bar 1 attached to the shaft 20.
[0013]
The spline shafts 19 and 20 are engaged with each other by three or more teeth to transmit the rotational torque, the spline shaft 20 slides in the axial direction, and the spline shafts 19 and 20 maintain the coaxiality with each other.
[0014]
The drive unit is immersed in the oil in the lubricating oil tank 26. The rotating shaft and sliding shaft connected to the servomotor 15 are supported by an oil tank bearing portion 27, and an oil seal is provided on each bearing portion to prevent oil leakage due to operation in the rotational direction and the axial direction.
[0015]
【The invention's effect】
In the vertical drive unit, the rotary link is converted into a linear motion without using screws and nuts, so the drive unit is small and lightweight, reducing noise and vibration, and enabling high-speed operation. It was.
[0016]
The vertical drive unit and the holding / opening drive unit are integrated using a common spline shaft. The drive unit can be reduced in size and weight, noise vibration is reduced, and high-speed operation is possible.
[0017]
The main mechanism is immersed in lubricating oil, preventing dust from entering, improving the lubrication effect and preventing local temperature rise, extending the service life of the mechanism elements and reducing maintenance.
[0018]
The drive section has become smaller and can be mounted not only on the press but also on the mold, increasing the space available around the press.
[Brief description of the drawings]
FIG. 1 is an explanatory diagram of a transfer feeding device.
FIG. 2 is an example of a press equipped with a conventional transfer feeder.
FIG. 3 is an example of a prior art transfer feeder portion.
FIG. 4 is an embodiment of a press equipped with a transfer feeding device.
FIG. 5 shows an embodiment of a transfer feeder portion.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Transfer bar 2 Finger 3 Parts 4, 12 Drive part 5, 13 of conveyance operation Drive part 6, 14 of holding operation | movement, 14 Drive part 7, 15, 23 of up-down operation Servo motor 8, 24 Screw shaft 9, 25 Nut 10 Link 11 Slide guide 16, 17, 18 Gear 19, 20 Spline shaft 21 Oscillating link 22 Rotating shaft 26 Lubricating oil tank 27 Oil tank bearing

Claims (1)

A first servo motor (15) and a rotary shaft coupled to the first servo motor;
A second servo motor (23) and a screw shaft (24) connected to the second servo motor and provided with a pair of right and left screws on the left and right;
A gear (16) fixed to the rotating shaft, a rotatable gear (17) provided on the screw shaft (24) meshing with the gear (16), a gear meshing with the gear (17) and the gear (17 ) Via a gear (18) rotated by the gear (16), a first spline shaft (19) to which the gear (18) is fixed,
A pair of left and right second spline shafts coaxial with the first spline shaft, each of which includes a second spline shaft (20, 20) provided with a recess provided around the second spline shaft;
A pair of left and right forward and reverse nuts on the screw shaft, each having a convex portion that engages with a concave portion of the second spline shaft, and reciprocally moves when the screw shaft rotates. A nut (25, 25) which slides the spline shaft in the axial direction and does not rotate when the second spline shaft rotates;
A swing link (21, 21) attached to each end of the second spline shaft;
The oscillating link connected to the peristaltic link and driven by the first servo motor through movements of the rotary shaft, the gears (16, 17, 18) and the first spline shaft (19). By moving the screw shaft (24), the nuts (25, 25), and the second spline shaft (20) through the movement of the second servo motor. A transfer bar (1) that is held and released by sliding in the axial direction of the swing link (21);
A bearing portion rotatably supporting each of the rotating shaft, the screw shaft (24), and the pair of left and right second spline shafts (20, 20);
The rotating shaft, the screw shaft (24), the gears (16, 17, 18), the first and second spline shafts (19, 20, 20), and the nuts (25, 25) are placed in lubricating oil. An immersed lubricating oil bath (26),
A transfer feeding device for press working, wherein the bearing portion is provided with an oil seal that prevents oil leakage due to the rotational movement of the rotating shaft and the screw shaft and the axial movement of the second spline shaft.

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