JPH0780576A - Automatic feeding device - Google Patents

Abstract

PURPOSE:To provide an automatic feeding device which can reduce the weight of a part to hold and move a work. CONSTITUTION:This device is provided with a fixed frame 14 providing servo motors 16, 18 for elevating, for horizontally moving, a 1st and a 2nd elevating frames 20, 22 installed freely elevatably along a guide rod, and a rotary wheel 24 which is supported freely turnably on a back surface side of the frame 20 and horizontally moves a feed bar supported freely movably on the frame 20 through a rack and a pinion. Further, this device consists of an idler roller 26 arranged on the back surface side of the frame 22, a driving pulley 50 fixedly installed on a rotary shaft of the motor 18, a timing belt 28 wound in endless between a wheel 24 and a roller 26, a 1st link mechanism 30 to converter the rotation of the motor 16 into the vertical movement, and a 2nd link mechanism 32 to move the frame 22 vertically so that the belt is not loosed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic feeding device, and more particularly, it is provided with a suction device at the end of a feed bar, and a work is sucked and held by this suction device. The present invention relates to a device for automatically sending a work from one place to another by lowering it to release suction.

[0002]

2. Description of the Related Art Recently, when a plurality of processing machines are used to machine one work, an apparatus for automatically feeding the work from one processing machine to the other is used. Such a device is called an automatic feeding device. For example, when a work is automatically fed between two press working machines, the automatic feeding device is located at an intermediate position between the two press working machines. Is installed.

By the way, various types of automatic feeding devices used for such purposes are provided, and one of them is a horizontally supported feed bar and an end portion of the feed bar. There is a type that is equipped with a suction device provided in the above, and causes the feed bar to perform ascending, horizontal feeding, and lowering operations, and by attaching and detaching the work with the suction device, the work is sent from one to the other. Is disclosed in Japanese Utility Model Publication No. 3-14023.

The automatic feeding device disclosed in this publication includes a lifting / lowering servo motor fixed in the vertical direction of a fixed frame installed on the floor, and a first lifting / lowering frame for lifting and lowering by this servo motor. An oscillating servomotor fixed to the first elevating frame, an oscillating lever which is oscillated by the oscillating servomotor, two oscillating links whose intermediate position is pin-coupled to the oscillating lever, and the oscillating link. A feed bar that is pin-coupled to the upper end of the movable link and is always kept horizontal, and a second bar that is pin-coupled to the lower end of the swing link.
It is composed of a lifting frame and.

In the automatic feeding device configured as described above,
When the lifting servo motor is driven to rotate, the first lifting frame moves up and down, and when the swing servo motor is driven to rotate, the swing lever swings due to this rotational force, and the swing link moves due to the swing movement of the lever. Holds the feed bar horizontally and swings, so that the feed bar is fed in the horizontal direction.

However, the conventional automatic feeder having such a structure has the technical problems described below.

[0007]

That is, in the automatic feeder disclosed in the above publication, when the lifting servomotor is driven, the first lifting frame moves up and down. In this case, however, the first lifting frame does not move. Since a swinging servo motor, a swinging lever, a swinging link and the like are provided, the weight of the portion to be moved up and down is very large, which causes a problem that power consumption during driving increases.

Further, if the swing servo motor is constructed so as to move up and down, there is a problem that the structure of the portion for supplying electric power to the motor becomes complicated. The present invention has been made in view of such conventional problems, and an object thereof is to reduce energy consumption by reducing the weight of a portion to be vertically moved or horizontally moved as much as possible. It is to provide an automatic feeding device that can be completed.

[0009]

To achieve the above object, the present invention comprises a horizontally supported feed bar and a suction device provided at an end portion of the feed bar, and is elevated to the feed bar. , Horizontal feed, descending operation,
In an automatic feeder that feeds the work from one side to the other by attaching and detaching the work with the suction device, a fixed frame installed on the floor surface, and a lifting and horizontal movement servo motor installed on the fixed frame. A first and a second elevating frame which are installed on the fixed frame so as to elevate and lower, a rotating wheel which is rotatably supported on the first elevating frame, and a horizontally movable support on the first elevating frame, The feed bar that moves in the horizontal direction as the rotary wheel rotates, the idler roller that is rotatably supported by the second elevating frame, the horizontal movement servo motor, the rotary wheel, and the idler roller. The timing belt is wound between the timing belt, and is provided between the lifting servomotor and the first lifting frame. A first link mechanism for converting the rotation of the motor to the vertical movement, the said lifting servomotor second
A second link mechanism is provided between the elevating frame and the second elevating frame, and vertically moves the second elevating frame by the same amount as the first elevating frame moves up and down.

[0010]

According to the automatic feeder having the above structure, the fixed frame installed on the floor surface, the lifting servomotor installed on the fixed frame, and the first lifting frame installed on the fixed frame so as to be vertically movable. And a feed bar horizontally supported by the first elevating frame, and a first link mechanism provided between the elevating servo motor and the first elevating frame for converting rotation of the servo motor into vertical movement. Therefore, when the lifting servomotor is rotationally driven in the normal or reverse direction, this rotational force is converted into vertical movement by the first link mechanism and transmitted to the first lifting frame, thereby supporting the feed bar. The first elevating frame moves vertically.

In this case, the first elevating frame is provided with the feed bar and the rotary wheat, but since the horizontal moving servomotor is provided on the fixed frame, the weight of the portion to be moved up and down is small. Become. Further, when the first elevating frame is moved up and down, the timing belt is not loosened between the elevating servo motor and the second elevating frame due to the vertical movement of the first elevating frame. Since the second link mechanism for moving up and down by a fixed amount is provided, it is possible to prevent the timing belt from loosening and dropping when the feed bar is moved up and down.

On the other hand, according to the automatic feeder having the above structure,
Fixed frame installed on the floor, servo motor for horizontal movement installed on this fixed frame, first and second elevating frames installed vertically on the fixed frame, and rotatable on the first elevating frame Supported by the rotating wheel and the first lifting frame so as to be horizontally movable,
The feed bar that moves in the horizontal direction as the rotary wheel rotates, the idler roller that is rotatably supported by the second elevating frame, and the horizontal moving servo motor and the rotary wheel and the idler roller that are wound around the idler roller. Since it has a timing belt, when the servo motor for horizontal movement is rotationally driven, this rotational force is transmitted to the rotary wheel via the timing belt, and the feed bar can be horizontally moved by the rotation of the rotary wheel.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will be described in detail below with reference to the accompanying drawings. 1 to 4 show an embodiment of an automatic feeding device according to the present invention. The automatic feeder shown in the figure, like the conventional example described above, for example,
It is installed at an intermediate position between a pair of press working machines, receives a work from a work placing table of one press working machine, and sends the received work to the other press working machine.

The automatic feeder shown in the figure has a feed bar 10 supported horizontally and the feed bar 10.
And a pair of suction devices 12 provided at the ends of the suction bar 12 to cause the feed bar 10 to perform ascending, horizontal feeding, and descending operations so that the work is detached by the suction device 12. The basic structure of the feeder is
Although it is the same as this type of conventional device, the automatic feeding device of this embodiment is characterized by the following points.

That is, the automatic feeder shown in FIGS. 1 to 4 has a fixed frame 14, vertical and horizontal movement servomotors 16 and 18, first and second vertical frames 20 and 22, and a rotary wheel. 24 and idler roller 2
6, a timing belt 28, and first and second link mechanisms 30 and 32. The fixed frame 14 is formed in a substantially rectangular box shape and includes a support frame 34.
And a plurality of support legs 36 are installed on the floor.

Servo motor 1 for raising and lowering and for horizontal movement
6 and 18 are provided with a pair of rectangular window holes 15 on the front side of the fixed frame 14 at intervals in the vertical direction, and are installed in the window holes 15, respectively.
Is for up and down movement, and the lower servomotor 16
Is for lifting. First and second lifting frame 2
0 and 22 are coaxially installed on the vertical center axis of the fixed frame 14, and are vertically movable along a pair of guide rods 38 provided at both ends of each frame 20 and 22.

The rotating wheel 24 is rotatably supported on the rear side of the first elevating frame 20 provided above the fixed frame 14, and a pinion 42 is fixedly provided at one end of its rotating shaft 40. There is. The feed bar 10 has a substantially T-shaped cross section, and is arranged on the front side of the first elevating frame 20. A pair of guide plates 44 facing each other is fixedly provided on the front surface side of the first elevating frame 20, and the inner surface of the guide plate 44 has a large number of upper end side projecting portions of the feed bar 10 sandwiched from above and below. The rotary rollers 46 are pivotally mounted in a row, and with this configuration, the feed bar 10 is supported by the first elevating frame 20 so as to be horizontally movable.

Further, a rack 48 meshing with the pinion 42 is fixed to the upper end surface of the feed bar 10 along the longitudinal direction of the rack 48 for the entire length thereof.
With the rotation of 4, the feed bar 10 is moved in the horizontal direction by the pinion rack mechanism. The idler roller 26 is arranged on the back side of the second elevating frame 22 provided below the fixed frame 14. In this embodiment, a pair of idler rollers 26 sandwiches the rotation center of the horizontal movement servomotor 18 and both sides thereof. It is located in.

The drive pulley 50 fixed to the rotary shaft of the horizontal movement servo motor 18, the rotation center of the rotary wheel 24, and the pair of idler rollers 26 are set so as to be located on the same vertical plane. A timing belt 28 is endlessly wound between these members. The first link mechanism 30 is provided between the lifting servomotor 16 and the first lifting frame 20 and converts the rotation of the servomotor 16 into vertical movement.

The first link mechanism 30 includes an arm 54 whose center is fixed to a rotary shaft 52 of the lifting servomotor 16.
The lower end of the arm 54 is pin-connected to one end of the arm 54, and the first link rod 56 extends upward along the fixed frame 14.
And an oscillating link rod 58, one end of which is connected to the upper end of the first link rod 56 by a pin. The oscillating link rod 58 includes the first elevating frame 20 and the horizontal movement servomotor 18. And a point ⅓ in the longitudinal axis direction thereof is fixedly supported by the fixed frame 14 by the pin 60.

One end of a second link rod 62 extending in a substantially vertical direction is pin-connected to the other end of the swing link rod 58, and the other end of the second link rod 62 is connected to the first elevating frame 20. The side of the fixed connecting plate 64 is pin-connected. The second link mechanism 32 is provided between the lifting servomotor 16 and the second lifting frame 22,
The third link rod 66 is pin-connected to the other end of the arm 54, and the T-shaped connecting plate 68 is pin-connected to the other end of the third link rod 66.
Is fixed to the second elevating frame 22.

The second link mechanism 32 constructed in this way
Is configured to drive the elevating servomotor 18 to move the first elevating frame 20 up and down via the first link mechanism 30, so that the second elevating frame 22 is moved up and down by the same amount. The lengths of rods and arms are set. Next, the operation of the automatic feeding device having the above configuration will be described. First, when the feed bar 10 is moved up and down in the vertical direction, the lifting servo motor 16 is driven. When the raising / lowering servomotor 16 is rotationally driven in the normal or reverse direction, this rotational force causes the arm 54 of the first link mechanism 30, the first link rod 56, the swing link rod 58,
When being transmitted to the second link rod 62 and transmitted to the first elevating frame 20 via the connecting plate 64, the rotational force is converted into vertical movement and transmitted to the first elevating frame 20.

At this time, the first elevating frame 20 is restricted from moving in the lateral direction by the guide rod 38. Therefore, when the ascending / descending servomotor 16 is rotationally driven in the normal or reverse direction, the feed bar is accompanied. The first elevating frame 20 supporting 10 moves up and down along the guide rod 38. In this case, the feed bar 10 and the rotating wheel 24 are provided on the first elevating frame 20, but the horizontal movement servomotor 18 is provided on the fixed frame 1 side, and therefore the portion for moving up and down is provided. Weight is reduced.

When the first elevating frame 20 is moved up and down, the second elevating frame 20 moves between the elevating servomotor 16 and the second elevating frame 22 as the first elevating frame 20 moves up and down. The frame 22 is the first lifting frame 2
Since the second link mechanism 32 that moves up and down by ½ of the lifting amount of 0 is provided, it is possible to prevent the timing belt 28 from loosening and dropping when the feed bar 10 is moved up and down.

On the other hand, when feeding the feed bar 10 in the horizontal direction, the horizontal movement servomotor 18 is rotationally driven. When the horizontal movement servomotor 18 is rotationally driven, this rotational force is transmitted to the rotary wheel 24 via the timing belt 28, the rotational force of the rotary wheel 24 is transmitted to the pinion 42, and the pinion 42 is fed to the feedbar 10.
Since it is meshed with the rack 48 provided in, the feed bar 10 can be horizontally moved by rotating the pinion 42.

According to the automatic feeder constructed as described above, the weight of the portion to be moved up and down is reduced, and at the same time, it is not necessary to supply power to the portion to be moved up and down and horizontally fed. The effect of simplifying the structure of the section is also obtained, and there is no problem even if the fido bar 10 is caused to perform the ascending / descending movement operation and the horizontal feed simultaneously.

[0027]

As described above in detail in the embodiments,
According to the automatic feeder of the present invention, energy consumption can be reduced and the structure of the power supply unit can be simplified by reducing the weight of the portion that holds and moves the work as much as possible.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of an automatic feeding device according to the present invention.

FIG. 2 is a rear view of the main part of FIG.

FIG. 3 is a side sectional view of a main part of FIG.

FIG. 4 is an enlarged cross-sectional view of a main part of FIG.

[Explanation of symbols]

 10 Feed Bar 12 Adsorption Device 14 Fixed Frame 16 Elevating Servo Motor 18 Horizontal Moving Servo Motor 20 First Elevating Frame 22 Second Elevating Frame 24 Rotating Wheel 26 Idler Roller 28 Tanming Belt 30 First Link Mechanism 32 Second Link Mechanism 38 Guide rod 42 Pinion

Claims (1)

[Claims] 1. A horizontally supported feed bar, and a suction device provided at an end of the feed bar, wherein the feed bar is moved upward, horizontally fed, and lowered.
In an automatic feeding device that feeds the work from one side to the other by attaching and detaching the work with the suction device, a fixed frame installed on the floor surface, and a lifting and horizontal movement servo motor installed on the fixed frame. A first and a second elevating frame that is installed on the fixed frame so as to elevate and lower, a rotating wheel that is rotatably supported by the first elevating frame, and a horizontally movable support on the first elevating frame, A feed bar that moves in the horizontal direction as the rotary wheel rotates; an idler roller that is rotatably supported by the second elevating frame; a horizontal movement servo motor; the rotary wheel; and the idler roller. The timing belt wound between the timing belt and the servo motor for raising and lowering and the first raising and lowering frame, A first link mechanism that converts rotation of a servo motor into vertical movement; and a second linking frame that is provided between the lifting servomotor and the second lifting frame and that moves up and down with the first lifting frame. And a second link mechanism for vertically moving the timing belt by a predetermined amount so that the timing belt does not slacken.