JPH09142661A - Magnetic conveyer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To automatically reload a work on a conveyer without any man power by lifting only an aimed work while pressurizing an adjoining work by a weight, after attracting the work by a magnet attracting device. SOLUTION: A magnet attracting device 5 is positioned above an aimed work row and an elevating cylinder is operated so as to be lowered in the direction of an arrow (a). When the bottom wall 22 of the magnet attracting device 5 contacts with a work (W), the bottom of an adjoining weight 27 contacts with an adjoining work (W). The operation of the elevating cylinder is continued as they are and when a sliding rod 26 is raised relatively to a mounting frame 24 as shown by an arrow (d), the elevating cylinder is stopped. A permanent magnetic 12 is made to approach to the bottom wall 22 as shown by an arrow (b), the work (W) is attracted to the bottom wall 22 so as to operate the elevating cylinder, the magnet attracting device 5 is raised as shown by an arrow (e), and the work (W) is lifted. The magnet, attracting device 5 is raised to such height that the magnetic force does not affect on the adjoining work (W), the top part 26 of the sliding rod 26 contacts with the mounting frame 24 so that the weight 27 is raised together.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic transfer device capable of transferring a work made of a magnetic material.

[0002]

2. Description of the Related Art In the field of powder metallurgy, after forming a large number of works, they are placed on a wire mesh tray (work rest) and sent to a firing process. After firing, the works are sent one by one to a straightening process.
It is commercialized by sizing press. The work after firing is placed on the tray in a number of aligned states,
The work must be transferred from the tray to the conveyor in sequence.

In the past, a worker manually lifted a work from a tray and placed it on a conveyor.

[0004]

Conventionally, since the work pieces are manually replaced, the work load is large,
Improvement was desired.

In view of the above circumstances, it is an object of the present invention to provide a magnetic transfer device capable of automatically repositioning a work on a conveyor without manual labor.

[0006]

According to a first aspect of the present invention, there is provided a magnetic transfer device for lifting a predetermined number of works from works made of magnetic material arranged on a work table and carrying them to a destination. There is an elevating frame that can be moved up and down by an elevating mechanism, a moving mechanism that moves the elevating frame between the upper part of the work platform and the transport destination, and an elevating frame that is provided on the elevating frame and directs the suction surface downward, and suction ON In this state, the work can be adsorbed, and when it is in the OFF state, the work is released. It is slidable up and down, and its lower end is positioned below the attraction surface of the magnetic attraction device by the predetermined weight while hanging down by its own weight. When raising the arm, characterized in that the adjacent work force adsorber and a weight to press with its own weight until the rise predetermined height.

According to a second aspect of the present invention, in the magnetic attraction device, at least the bottom wall forming the attraction surface is made of a non-magnetic material box, the permanent magnet is housed in the box, and the permanent magnet is the bottom wall. It is characterized in that it is configured by a suction force variable mechanism for moving the suction force closer to and away from.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows a magnetic transfer device 10 according to an embodiment.
FIG. 2 is a block diagram of the main part showing the operation contents of 0 together.
00 is a front view, and FIG. 3 is a plan view showing a layout of an entire system incorporating the device 100. It should be noted that FIG. 1 is an enlarged view of a main part as seen from the direction of arrow I-I in FIG. 3.

First, the overall layout will be briefly described with reference to FIG. 3. Reference numeral 51 is a table lifter in which wire-mesh trays S are stacked, 56 is an empty tray collecting space, and 52 is a work W on a sizing press 57. The feeding conveyor which feeds one by one is shown. The magnetic transfer apparatus 100 according to the embodiment of the present invention lifts the works W one row at a time from the tray S sequentially lifted by the table lifter 51.
It is for remounting on the conveyor 52.

This magnetic transfer apparatus 100 is provided with an elevating frame 21 that can be moved up and down in order to raise and lower a work W, and a direction that intersects the elevating frame 21 with the conveying direction of a conveyor 52 [arrow (f) in FIG. 3]. Direction], and has a moving mechanism 55 for positioning at an arbitrary position above the tray S and a position above the conveyor 52. Lifting frame 2
1 is formed long along the conveying direction of the conveyor 52,
It is set to a size that can cover the entire work for one row.

Next, details of the magnetic transfer device 100 are shown in FIG.
This will be described with reference to FIG. As shown in FIG. 2, the elevating frame 21 is configured as an upper wall of the rectangular box 20. The bottom wall 22 of the box 20 is made of a non-magnetic material (for example, stainless steel). Inside the box 20, a long permanent magnet 12 is housed. A bracket 15 is attached to the upper part of the elevating frame 21 via a column 14.
A cylinder (adsorption force variable mechanism) 16 is attached to 5 with its rod facing downward. And the permanent magnet 12
With this cylinder 16, the bottom wall 2 inside the box 20
2 is raised and lowered relative to 2, thereby causing the bottom wall 22
The magnetic attraction force of the bottom wall 22 serving as the attraction surface can be adjusted including the ON / OFF state by adjusting the distance between and. Here, the box 20 and the permanent magnet 12
The cylinder 16 constitutes the magnetic attraction device 5 that can turn the attraction force on and off. It is also possible to configure this part with an electromagnet.

Two guide rods 3 are provided above the magnetic attraction device 5 integrated with the elevating frame 21, and the guide rods 3 are supported by the moving frame 1 via bearings 2 so as to be slidable in the vertical direction. ing. The moving frame 1
It is moved by the above-mentioned moving mechanism 55 shown in FIG. The moving frame 1 may be able to move up and down by a separate (separate from the below-described) elevating mechanism if necessary.

An elevating cylinder (elevating mechanism) 10 is attached to the moving frame 1, and a tip end of a rod of the elevating cylinder 10 is elastically connected to a magnetic attraction device 5 via a spring 8 and a shaft 6. It is fixed to. The shaft 6 has a lower end fixed to the elevating frame 21, an upper end slidably inserted into the insertion hole 7a of the bracket 7, and a nut 7b fixed to the upper end thereof. Then, the spring 8 is provided between the bracket 7 and the elevating frame 21.
When the cylinder 10 is driven to lower the magnetic attraction device 5, the magnetic attraction device 5 can be elastically pressed against the work W, and when the rod of the cylinder 10 is raised, the nut By hitting the bracket 7 with 7b,
The magnetic attraction device 5 is lifted via the shaft 6.

Further, as shown in FIG. 1, the lifting frame 2
A weight mounting frame 24 is continuously provided on the side of 1,
A weight 27 is hung on the weight mounting frame 24 so as to be adjacent to the magnetic attraction device 5. This weight 27
Is mounted on the mounting frame 2 with the slide bar 26 protruding from the upper end.
It is supported so as to be slidable in the vertical direction by being inserted into the insertion hole 25 of No. 4 and the head 26a of the slide rod 26 abuts on the upper surface of the mounting frame 24 to stop descending. Then, the weight 27 hangs down by its own weight, the lower end thereof is positioned below the attraction surface 22 of the magnetic attraction device 5 by a predetermined dimension, and the lifting frame 21 is raised while the work W is attracted by the magnetic attraction device 5. When the figure 1
As shown in (b), the magnetic attraction device 5 serves to hold down the adjacent work W by its own weight until the magnetic attraction device 5 rises to a predetermined height.

Next, the operation will be described mainly with reference to FIG. When the work W in a certain row is transported, the moving mechanism 55
Is operated to position the magnetic attraction device 5 above the targeted work row. Next, as shown in FIG. 1A, the lifting cylinder 10 is operated to move the magnetic attraction device 5 to the arrow (a).
To lower. When the bottom wall 22 of the magnetic attraction device 5 hits the work W, the lower end of the adjacent weight 27 also moves to the adjacent work W.
Hit. If the lifting cylinder 10 continues to operate, the position of the magnetic attraction device 5 does not change, so the spring 8
Shrinks and the weight 27 position does not change, so slide bar 2
6 rises relative to the mounting frame 24 as indicated by the arrow (c).

The lifting cylinder 10 is stopped when the spring 8 contracts by a predetermined amount. Then, the cylinder 16 that constitutes the attraction force varying mechanism is operated to bring the permanent magnet 12 closer to the bottom wall 22 as indicated by the arrow (b). Then, the magnetic force is applied to the work W through the bottom wall 22 made of a non-magnetic material, and the work W is attracted to the bottom wall 22.

In this state, the rod of the lifting cylinder 10 is raised. Then, when the rod of the lifting cylinder 10 is lifted by the amount of contraction of the spring 8, the magnetic attraction device 5 starts to lift as shown by the arrow (d) in FIG. 1B, and the work W is lifted. At this point, the weight 27 presses the adjacent work W. Therefore, even when the magnetic force is applied to the adjacent work W, the adjacent works W are not dragged together and are held in a fixed position, and the alignment state of the adjacent works W is not disturbed.

Until the magnetic attraction device 5 rises to a height that does not reach the adjacent work W due to the influence of the magnetic force of the magnetic attraction device 5 (including the one through the attracted work W), the weight 27 is applied. Does not rise, and the slide bar 26 moves relative to the mounting frame 24 in the direction of the arrow (e) during that time. Then, when the magnetic attraction device 5 rises to a height where the magnetic force does not reach the adjacent work W, the head 26a of the slide rod 26 hits the upper surface of the mounting frame 24. After that, the weight 27 rises together with the magnetic attraction device 5, and the weight 27 separates from the work W. Therefore, in this state, the magnetic attraction device 5
To move the adsorbed work W to the conveyor 5
2 can be transferred onto.

When the magnetic attraction device 5 moves above the conveyor 52, the rod of the lifting cylinder 10 is lowered to lower the magnetic attraction device 5. Then, when the work W lands on the transfer surface of the conveyor 51, the cylinder 1 of the suction force varying mechanism is
6 is operated to separate the permanent magnet 12 from the bottom wall 22, and the attraction force is extinguished. After that, the magnetic attraction device 5 is moved up and down to complete the work of transferring the work W for one row on the conveyor 52.

After that, the magnetic attraction device 5 is sequentially positioned on the work W in the next row, and the same work as above is repeated. As described above, the work W can be automatically transferred without manual labor. Therefore, it is possible to save labor and contribute to automation of the entire system.

If the distance between the permanent magnet 12 and the bottom wall 22 at the time of approach is changed according to the size of the work W, the attraction force for the work W can be adjusted, and the work W can be reasonably and quietly. It can be transported, and the work W is not damaged.

[0022]

As described above, according to the first aspect of the present invention, after adsorbing the work by the magnetic attraction device, only by raising the elevating frame, the adjoining work is pressed by the weight, and the aimed work is performed. Only chisel can be attracted and lifted by magnetic force. Therefore, although a magnetic force is used, only a predetermined number of works can be reliably transported without disturbing the alignment of other works. After transportation, the work can be lowered by turning off the suction. Therefore, it is possible to automatically carry out the work transfer work without manual labor.

According to the invention of claim 2, the attraction ON state can be brought by bringing the permanent magnet close to the bottom wall of the box, and the attraction OFF state can be brought by moving the permanent magnet away from the bottom wall of the box. Can be Also, the attraction force of the attraction surface can be adjusted by adjusting the distance that the permanent magnet is brought closer to the bottom wall of the box. Therefore, it is possible to convey works of various weights with a simple structure using permanent magnets.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a main part of an embodiment of the present invention, (a) is a side view showing a state where a lifting frame is lowered and a work is attracted by a magnetic attraction device, and (b) is a further raising frame. FIG. 11 is a side view showing a state in which only necessary works are lifted while pressing adjacent works with a weight.

FIG. 2 is a front view of the embodiment.

FIG. 3 is a plan view showing the layout of the entire system including the magnetic transfer device of the embodiment.

[Explanation of symbols]

 W Work S Tray (work rest) 5 Magnetic attractor 10 Lifting cylinder (lifting mechanism) 12 Permanent magnet 16 Cylinder (charging force varying mechanism) 20 Box 22 Bottom wall (charging surface) 21 Lifting frame 27 Weight 55 Moving mechanism 100 Magnetic force Type conveyor

Claims (2)

[Claims] 1. A magnetic transfer device for lifting a predetermined number of works out of works made of magnetic material arranged on a work table and carrying them to a destination, wherein the lifting frame is lifted and lowered by a lifting mechanism. And a moving mechanism that moves the elevating frame between the upper part of the work platform and the transport destination, and is provided on the elevating frame so that the suction surface faces downward and the work can be sucked when the suction is ON. O
A magnetic attraction device that releases the attraction of the work in the FF state, and a state in which it is attached to the lifting frame adjacent to the magnetic attraction device and is slidable up and down with respect to the lifting frame within a predetermined dimension, and it hangs down by its own weight. The lower end is positioned below the attraction surface of the magnetic attraction device by the predetermined dimension, and when the elevating frame is raised with the work attracted by the magnetic attraction device, the magnetic attraction device raises the adjacent work by a predetermined height. A magnetic transfer device characterized by being equipped with a weight that holds down to its own weight. 2. The magnetic attraction device, wherein at least a bottom wall forming an attraction surface is made of a non-magnetic material box, a permanent magnet housed in the box, and an attraction for moving the permanent magnet toward and away from the bottom wall. The magnetic transfer apparatus according to claim 1, wherein the magnetic transfer apparatus is configured by a force varying mechanism.