KR930004179Y1 - Autofeeding device - Google Patents

Abstract

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Description

Automatic feeder

1 is a front view of the main portion showing an embodiment of the automatic transfer device of the present invention.

2 is a longitudinal cross-sectional side view of FIG.

3 is a longitudinal cross-sectional side view different from FIG.

4 is a diagram for explaining the operation of FIG.

5 is a schematic plan view showing a conventional automatic transfer device.

* Explanation of symbols for main parts of the drawings

22: fixed frame 24: lifting servo motor

30: first lifting frame 32: swing for servo motor

36: rocking lever 38: rocking link

42: feed bar 48: second lifting frame

The present invention relates to an automatic transfer device for a workpiece, and in particular, a device for absorbing a workpiece by an adsorption device provided at both ends of the feedbar, and the feedbar automatically moves the workpiece by raising, horizontally moving, and lowering it. It is about.

There are a variety of automatic transfer devices for transferring a workpiece between a plurality of machines, for example, a plurality of presses, but one of them is a suction device provided at both ends of the feed bar to transfer the workpiece. The device exists.

An example of this apparatus is shown in FIG. This apparatus 11 is arrange | positioned between the presses 10 which are a processing machine, and transfers the to-be-processed object 12 from the press 10 to the press 10. The apparatus 11 has a feed bar 16 held horizontally by a guide 14, and an adsorption device 18 is provided at both ends of the peered bar 16. The adsorption apparatus 18 is made to adsorb | suck the to-be-processed object 12, since negative pressure is applied by air. The guide 14 slides the feed bar 16 to be transported in the horizontal direction, and simultaneously raises and lowers itself. Moreover, the intermediate mounting stand 20 is provided in the center of two press machines.

In this conventional apparatus, the feed bar 16 descends together with the guide 14 and adsorbs the workpiece by the adsorption device. Next, the feed bar 16 ascends and carries out the feeding operation in the slide in the horizontal direction. Then, it descends to release the adsorption.

Then, it rises again and returns horizontally to the opposite direction to complete one cycle. By this one cycle, the workpiece is transferred from one processing machine 10 to the middle steel placing table 20 provided at the center, or from the intermediate placing table 20 to the other processing machine 10. Therefore, by performing this cycle twice, the workpiece is automatically transferred from one processing machine 10 to the other processing machine 10. Such a conventional apparatus is described in, for example, publications such as Japanese Unexamined Patent Office 55-55886, Japanese Unexamined Patent Application 63-45891, Japanese Unexamined Patent Application 59-49426, and the like.

However, the conventional apparatus requires a guide 14 for keeping the feed bar 16 horizontal, and there is a sliding portion between the guide 14 and the feed bar 16, resulting in severe wear. For this reason, the sliding parts had to be replaced frequently, which made maintenance checks cumbersome and cumbersome. Or lubricating oil must be supplied to a sliding part, and the range which becomes dirty by lubricating oil was widened.

The present invention has been made in view of the above problems, and an object of the present invention is to obtain an automatic transfer device having less wear or a part which is dirty by lubricating oil.

The present invention has been made to achieve the above object, a fixed frame installed on the floor surface, a pair of track frame fixed to the vertical frame fixed to the fixed frame, the lifting yokebobo fixed to the vertical frame of the fixed frame, and A first elevating frame installed to be elevated by the elevating servo motor on the track frame, a swing servo motor fixed to the first elevating frame such that a motor shaft protrudes from the center of the first elevating frame, and an upper end thereof A pinned support formed by horizontally pinning a central rocking lever parallel to each other at both ends of the downward rocking lever connected to the swing side by the motor side and the rocking ripper on the top, and parallel to each other at the bottom end; A member, a feed bar having a center portion horizontally pinned to an upper portion of the swing link, and a lower end of the swing link; Combining horizontal pins each in a position about the being also characterized in that with the lifting frame of the second enable lifting the track frame is installed.

The lift servo motor lifts and lowers the fixed frame to the first lift frame. When the swing lever swings by the action of the swing servomotor fixed to the first lifting frame in the horizontal direction, the swing shafts swing while being in parallel quadrilateral state while keeping the swing links parallel to each other. .

As a result, the feed bar moves in the horizontal direction to perform the feeding operation. At this time, the feed bar performs the transfer operation while maintaining a constant height and horizontal state. The reason for this is that when the swing lever swings and is inclined at a certain angle, the lower end of the swing lever increases by a small amount due to this mirror image. However, the two swinging links pinned to the lower end of the swinging lever are inclined in opposite directions so that the upper end of the swinging link is slightly lowered. Therefore, the amount of micro lift and the amount of micro fall are offset, and the feed bar held at the upper end of the swing link maintains a constant height.

Next, an embodiment of the present invention will be described in FIGS. 1 to 4.

1 is a front view of the device. 2 is a longitudinal cross-sectional side view of FIG.

3 is a longitudinal cross-sectional side view of a portion different from that of FIG. 4 is a diagram for explaining the operation of FIG. The fixed frame 22 is installed at an intermediate position of the processing machine, for example, the processing machine 10. The lifting servomotor 24 is fixed to the fixed frame 22 in the vertical direction. A male screw is formed on the outer circumference of the motor shaft 26 of the lifting and lowering servo motor 24, and the support member 28 having a bowl fitted to the male screw on the inner circumferential surface is gathered. It is attached to the outer circumference of the rotor side. This holding | maintenance part 28 is being fixed to the 1st lifting frame 30 which is provided so that raising / lowering with respect to the fixed frame 22 is possible. Therefore, when the lifting servomotor 24 acts, the first lifting frame 30 moves up and down via the support body 28 in accordance with the rotation of the motor side 26.

The swing servo motor 32 is fixed to the first lifting frame 30 in the horizontal direction.

The swing lever 36 is fixed to the motor shaft 34 of the swing servo motor 32. The fixing is performed at the upper end of the swing lever 36, and the lower end of the swing lever 36 is to swing largely, and the pin is connected to the two swing links 38 and 38 via the pin coupling support member 40. Are combined. The pin-coupled support member 40 has a substantially triangular shape (see FIG. 1), and the rocking lever 36 is pin-coupled to the vertex portion thereof, and two rocking links each of the two vertices below. 38), the middle point of (38) is pinned.

The feed bar 42 is pin-coupled to the upper end of these two rocking links 38 and 38, and is horizontally maintained. The distance between the two pin couplings 44 and 44 with respect to the feed bar 42 and the distance between the two left and right pin couplings 46 in the pin coupling support member 40 are the same, so that the two The swing link 38 is always parallel to each other. The lower ends of the two swing links 38 are pinned to the second lifting frame 48.

The second elevating frame 48 is guided to the track rail 56 extending up and down via the slide member 58, so that the second elevating frame 48 can perform only an up and down operation. The distance between the two pin couplings 50 is equal to the distance between the pin couplings 44 and 46. Regarding the swing link 38, the longitudinal distances of the three pin couplings 44, 46, and 50 existing in the vertical direction in the figure are the same in the swing link 38 on the left and right. Similarly, the distance between the pin couplings of the swing lever 36 and the distance between the pin couplings of the pin couplings 44, 46, and 50 is the same. Therefore, when the two swinging links 38 swing around the pin coupling support member 40 due to the swinging of the swinging lever 36, the parallel movement of the upper feed bar 42 is always kept horizontal. do.

The balance cylinder 52 is installed in the vertical direction between the fixed frame 22 and the first elevating frame 30, and the first elevating frame 30 is always supported by a constant force with respect to the fixed frame 22. do. By the action of this balance cylinder 52, the servo motor 24 can raise and lower the first lifting frame 30 without being subjected to a large up-down load. In addition, a cylinder mode 54a of the stabilization cylinder 54 is connected to the lower end of the swing link 30 which is suspended from the first lift frame 30, and swings with respect to the first lift frame 30. The link 38 is made so as not to be unstable.

The first elevating frame 30 and the second elevating frame 48 are installed so as to be able to elevate with respect to the fixed frame 22, but the elevable structure is with respect to the track rail 56 installed at the fixed frame 22 side. The first elevating frame 30 or the second elevating frame 48 mounted by the slide member 58 installed on the first elevating frame 30 and the second elevating frame 48 and supported by the slide member 58 is provided. ) Is made to slide in the vertical direction.

The operation of this embodiment will be described below. The apparatus of this embodiment is provided between processing machines, such as a press machine, similarly to the conventional automatic transfer apparatus, and adsorb | sucks a to-be-processed object by the adsorption apparatus shown in the illustration which is provided in the both ends of the feed bar 42. FIG. After the adsorption, the feed bar 42 is raised, horizontally moved, and lowered. Then, the adsorption is canceled, and then, one cycle is completed by raising, lowering and returning in the horizontal direction again. An intermediate mounting stand is provided at the center of the two processing machines, and by one cycle, the adsorption device provided on a part of the feed bar transfers the workpiece from one processing machine to the intermediate mounting stand. The suction device installed at the other end of the feed bar transfers the workpiece from the intermediate mounting table to the other processing machine. Therefore, when two cycles have been performed, the workpiece is transferred from one processing machine to the other processing machine. Hereinafter, each operation will be described.

First, the operation of raising and lowering is demonstrated. When the lift shaft motor 24 is actuated and the motor shaft 26 is rotated, by the action of the male screw formed on the outer circumference of the motor shaft 26 and the bowl screw constituted by the bowl support portion 28, The branch 28 and the first elevating frame 30 perform the elevating operation.

The first lifting frame 30 is able to slide up and down along the track rail 56 with respect to the fixed frame 22, and is pressed upward by the balance cylinder 52, and has a small force. It is in the state which can lift up and down, and it moves up and down quickly by the action of the lifting servomotor 24 for lifting.

Next, the transfer operation or the return operation in the horizontal direction will be described.

When the swing servo motor 32 acts and the motor shaft 34 swings, the swing lever 36 fixed to the motor shaft swings in a downward state. In accordance with this swing, the swing link 38 also swings (FIG. 4). The two swing links 38 together with the second lifting frame 48 and the feed bar 42 form a parallel quadrilateral shape, and swing while maintaining this parallel state. And since the second lifting frame 48 is constrained in the left and right direction by the guide rail 56, the feed bar 42 swings to the left and right in a state where it is always kept horizontal. That is, when the swing lever 36 is inclined, the lower end of the swing lever 36 rises by a small amount, but at the same time the swing link 38 is also inclined to the opposite side, and the upper end of the swing link 38 is connected to the swing lever 36. Since a small amount falls about the lower end part, this fall amount and the said rising amount cancel, and eventually the upper end part of the oscillation link 38 always maintains the same up-down position, and the feed bar 42 is accompanied by up-down movement. The transfer operation is performed in the horizontal direction without this.

As described above, according to the automatic transfer device of the present embodiment, the feed bar does not require a guide as in the related art, and can perform the transfer operation in the horizontal direction without involving the up and down movement. For this reason, the necessity of replacing parts by abrasion can be suppressed, without having a wide range of sliding parts between a feed bar and a guide like the conventional art. In addition, it is also possible to prevent that the lubricant required for the sliding portion defiles the wide range without the sliding portion having a wide range.

As described above, according to the automatic transfer device of the present invention, the two swinging links can be rocked as they are while maintaining the state of parallel four deformations of the feed bar and the second lifting frame up and down, and the feed bar is horizontal. The horizontal conveyance operation is performed in the held state. In addition, the amount of small rise due to the inclination of the swing lever is canceled from the amount of small fall due to the inclination on the opposite side of the swing link, so that the feed bar performs the conveyance operation in the horizontal direction without accompanying the up and down movement. Therefore, the feed bar does not require a guide as in the related art, and the necessity of maintenance and inspection such as replacement of parts due to wear generated between the guides is reduced, and at the same time, a guide and its peripheral parts are required. Without this, the number of parts can be reduced. In addition, since it is not necessary to supply lubricating oil to a wide range of sliding parts existing between the feed bar and the guide, the inconvenience that the lubricating oil defiles a wide range can be eliminated.

Since the feed bar is driven by the servo motor in the up, down, left and right directions, the movement amount of the feed bar can be arbitrarily changed.

Claims (1)

The workpiece 12 is adsorbed by the adsorption device 18 provided on both floors of the single feed bar 16 which is installed on the floor surface and is horizontally held, and the feed bar 16 is moved up, horizontally transferred and lowered. In the automatic transfer device for receiving the workpiece 12 from the workpiece mounting surface of one side through the intermediate mounting table 20 to the other workpiece mounting surface while releasing the adsorption, it is provided on the floor surface A fixed frame 22, a pair of track frames 56 fixed to the fixed frame in the up and down direction, a lift servo motor 24 fixed to the up and down direction of the fixed frame, and the lift servo to the track frame. Oscillation servomotor fixed to the first elevating frame such that the first elevating frame 30 is installed to be elevated by the motor 24 and the motor shaft 34 protrudes in the center of the first elevating frame 30. The motor 32 and the top is Downward rocking levers 36 pivotally connected by a motor shaft and two pivoting links 38 and 38 parallel to each other at both ends of the bottom while pin-coupling the rocking levers at the top, respectively. A pin coupling supporting member 40 formed by horizontally engaging pins 46 and 46, a feed bar 42 having a central pin engaging 44 and 44 horizontally at an upper portion of the swing link; Second lifting frames 48, the lower ends of the oscillating links 38, 38 being horizontally pinned 50, 50, respectively, at a position centering on the motor shaft, and being mounted on the track frame. Automatic feeder characterized in that with).