JPH084761B2 - Magnetic cylinder and iron removing machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] [Industrial field of application] The present invention relates to an iron removing machine using a magnetic cylinder.

"Conventional technology and its problems" In conventional iron removing machines, various types of magnets such as magnet rolls or permanent magnets are provided in the raw material passage where iron pieces or iron powder (hereinafter referred to as iron pieces etc.) are mixed, The iron pieces are removed from the magnet roll or the magnet by stopping the device before the iron pieces attracted to the magnet roll and the magnet increase and the suction amount does not decrease.

In an iron removing machine using such a magnet, the time interval for removing iron pieces can be increased to some extent with a magnet roll, but automation is difficult and iron pieces sucked into the iron removing machine must be removed manually manually. Therefore, the device must be stopped during that time.

Therefore, there is one in which a magnetic cylinder having a magnet as a moving body is protruded and fixed inside the raw material passage, but iron pieces and the like in the raw material and objects other than the iron pieces cannot be dropped to different places.

An object of the present invention is to solve the above-mentioned drawbacks of the conventional iron removing machine and to provide an iron removing machine that is easy to automate and has durability.

[Structure of Invention]

"Means for Solving Problems" The present invention enables a movable body to be slidable in a longitudinal direction of the cylindrical body inside a cylindrical body of a non-magnetic body through which a magnetic flux of the movable body having a magnetic force penetrates. In an iron removing machine provided with a moving means for moving a movable body, an annular member is fixed to an outer periphery of a tubular body at an intermediate portion in the longitudinal direction, and the tip end side of the tubular body is provided with an iron piece or iron. The iron removing machine is characterized in that it is provided so as to be able to go in and out of a raw material passage of a raw material containing powder.

"Operation" By placing the moving body in the portion of the closed cylindrical body that is exposed to the raw material passage side, iron pieces and the like in the raw material are sucked into the portion.

The closed cylindrical body can be retracted from the raw material passage without moving the moving body. Then, it moves to the outside of the raw material passage together with the iron piece or the like sucked into the closed cylindrical body. Here, when the moving body is further moved in the same direction in the closed cylindrical body, the iron piece or the like attracted to the outer periphery of the closed cylindrical body moves following the moving body. When the moving body passes by the annular member, the iron pieces and the like are blocked by the annular member and collected and stay in one place. When the moving body leaves the annular member, the iron pieces and the like fall outside the magnetic field and fall due to gravity.

[Examples] Examples of the present invention will be described below with reference to the drawings.

First, the magnetic cylinder used in the present invention will be described.

FIG. 1 shows a vertical sectional view. A non-magnetic body, for example, a thin stainless steel closed tubular body 2 through which a magnetic flux of a moving body 1 made of a permanent magnet provided therein is, for example, a circular tubular shape, and is housed slidably in the longitudinal direction of the closed tubular body 2. Has been done. The space between the moving body 1 having a cylindrical magnetic force and the closed cylindrical body is sealed by an O-ring 4 fitted in an O-ring groove 3 in the circumferential direction on the outer circumference of the moving body 1. Ports 5 and 6 for the pressure fluid are provided at or near the longitudinal end of the closed tubular body 2. In this embodiment, the entrance / exit 6 is provided on one end plate 2a and the other end plate 2a is provided.
2b is a suction surface. The entrance / exit 5 is open to the cylindrical outer periphery near the end plate 2b. The inlets and outlets 5 and 6 are connected to the A and B ports of the four-way switching solenoid valve 7 by piping, and the P port communicates with the pressure fluid source. The T port communicates with the pressureless part.

Next, the above operation will be described. When the moving body 1 is at the left end of the figure, the end plate 2b and the moving body 1 are in contact with each other. The magnetic flux from the moving body 1 penetrates the outer shell of the closed cylindrical body 2 to create a magnetic field, so that the iron piece 8 is adsorbed on the outer surface of the closed cylindrical body 2. Here, when the P port and the A port of the solenoid valve 7 are passed, the pressure fluid enters the cylinder chamber on the side of the end plate 2b from the inlet / outlet 5 and moves the moving body 1 in the direction away from the end plate 2b.
When the moving body 1 moves from the end plate 2b, the iron piece or the like 8 adsorbed to the end plate 2b is removed from the end plate 2b because the magnetic field leaves together with the moving body 1.

The iron piece or the like 8 adsorbed on the outer periphery of the closed cylindrical body 2 moves to the right in FIG. 1 according to the movement of the magnetic field accompanying the movement of the moving body 1.

When the solenoid valve 7 is switched to connect the P port and the B port, the pressure fluid enters the cylinder chamber on the end plate 2a side from the inlet / outlet 6, and the moving body 1 moves in a direction away from the end plate 2a. When the moving body 1 moves to the left, the magnetic field that is emitted to the outside through the outer periphery of the closed cylindrical body 2 also moves in the same direction, so that the iron piece 8 moves left in FIG. When the moving body 1 contacts the end plate 2b, the iron piece 8 can be adsorbed to the outside of the end plate 2b.

In this way, the magnetic cylinder can carry the iron pieces 8 in the longitudinal direction.

As shown in FIG. 2, when the moving body 1 is in contact with the end plate 2b, if there is a magnetic member, for example, an iron member 9 made of an iron material, outside the end plate 2b, the magnetic flux of the moving body 1 will end up. It goes out through 2b, and the iron member 9 is attracted to the end plate 2b because the iron member 9 exists in the magnetic field generated by this.

Then, when the P port and the A port of the solenoid valve 7 are passed, the pressure fluid enters the cylinder chamber on the end plate 2b side from the inlet / outlet 5,
The movable body 1 moves in the direction away from the end plate 2b against the magnetic attraction force between the movable body 1 and the iron member 9. As a result, the magnetic field moves with the moving body 1 and leaves the iron member 6, so that the iron member 9 separates from the end plate 2b.

In this way, the magnetic cylinder can attach and detach the magnetic member to the end plate as if it were an electromagnet.

As described above, the magnetic cylinder has an action of transporting a magnetic substance in the longitudinal direction of the closed cylindrical body, and also has an action of detaching the magnetic member from the end plate. In the above, when it is not preferable to attach the iron piece 8 to the end plate 2b, as shown by the two-dot chain line in FIG. 1, the magnetic flux of the moving body 1 is placed between the end plate 2b and the moving body 1 so as not to reach the end plate 2b. A non-magnetic isolation member (10) that is separated is provided. The separating member 10 is suitably fixed to either the end plate 2b or the moving body 1. Or end plate 2b
May be thick enough.

FIG. 3 shows a spring offset type magnetic cylinder. The moving body 1, the closed cylindrical body 2, the O-ring groove 3, the O-ring 4, and the inlets and outlets 5 and 6 are the same as those in FIGS. 1 and 2. The solenoid valve 7 is a three-way switching valve that connects the P port and the A port or the A port and the T port communicate with each other. The compression coil spring 11 is provided between the end plate 2a and the moving body 1 in the closed cylindrical body 2.
Is inserted. The inlet / outlet 6 is open to the atmosphere when the fluid is air, and communicates with the tank of the hydraulic source when the fluid is pressure oil.

In the state where the pressure fluid is not supplied, the moving body 1 is pressed against the end plate 2b by the force of the compression coil spring 11. When the moving body 1 is at the left end of the figure, the magnetic flux from the piston 1 penetrates the outer shell of the closed cylindrical body 2 to create a magnetic field, so that the iron piece 8 is outside the closed cylindrical body 2. Adsorb to. Here, when the P port and the A port of the solenoid valve 7 are made to flow, the pressure fluid enters the cylinder chamber on the side of the end plate 2b from the inlet / outlet 5, and the moving body 1
Is moved against the compression coil spring 11 in a direction away from the end plate 2b. When the moving body 1 moves from the end plate 2b, the falling plate 2b
The iron piece 8 adsorbed on the side is detached from the end plate 2b because the magnetic field leaves together with the moving body 1.

The iron piece or the like 8 adsorbed on the outer periphery of the closed cylindrical body 2 moves to the right in FIG. 3 according to the movement of the magnetic field accompanying the movement of the moving body 1.

When the solenoid valve 7 is switched to connect the A port and the T port to each other, the moving body 1 is moved away from the end plate 2a by the spring force of the compression coil spring 11, and the pressure fluid flows out from the inlet / outlet 5 via the solenoid valve 7. To do. As the moving body 1 moves in a direction away from the end plate 2a, the magnetic field that is emitted to the outside through the outer circumference of the sealed cylindrical body 2 also moves in the same direction, so that the iron piece 8 and the like moves leftward in FIG. When the moving body 1 reaches the left end and the end plate 2b and the moving body 1 come into contact with each other, the iron piece 8 or the like can be adsorbed to the end plate 2b.

In this way, the magnetic cylinder can carry the iron pieces 8 in the longitudinal direction.

As shown in FIG. 4, when there is a magnetic member, for example, an iron member 9 made of an iron material, outside the end plate 2b when the end plate 2b is in contact with the moving member 1, the magnetic flux of the moving member 1 causes the end plate 2b to move. Through, and the iron member 9 is present in the magnetic field due to this, the iron member 9 is attracted to the end portion 2b.

Then, when the P port and the A port of the solenoid valve 7 are passed, the pressure fluid enters the cylinder chamber on the end plate 2b side from the inlet / outlet 5,
Magnetic attraction force between moving body 1 and iron member 9 and compression coil spring
The movable body 1 moves in the direction away from the end plate 2b against the spring force of 11. As a result, the magnetic field moves with the moving body 1 and leaves the iron member 9, so that the iron member 9 separates from the end plate 2b.

In this way, in the magnetic cylinder, a magnetic member can be attached to and detached from the end plate as if it were an electromagnet.

In FIG. 3, when it is not desirable to attach the iron piece 8 to the end plate 2b, as shown by the chain double-dashed line in FIG. 3, between the end plate 2b and the moving body 1 so that the magnetic flux of the moving body 1 does not reach the end plate 2b. A nonmagnetic isolation member (10) is provided to separate the. The separating member 10 is suitably fixed to either the end plate 2b or the moving body 1. Alternatively, the end plate 2b is thickened.

 An embodiment of the present invention will be described.

The present invention uses any one of the magnetic cylinders described above. An embodiment using the magnetic cylinder described in FIG. 1 will be described. FIG. 5 is a vertical sectional view of an embodiment of the present invention. In the figure, 1 is a moving body having magnetism, 2 is a closed cylindrical body made of a thin stainless steel pipe, 3 is an O-link 4 for sealing between the moving body 1 and the closed cylindrical body 2 provided on the outer periphery of the moving body 1. An O-ring groove for housing 5 is a port for the pressure fluid provided on one side in the moving direction of the moving body 1, 6 is a port for the pressure liquid provided on the end plate 2a on the other side in the moving direction of the moving body 1, 7
Is a four-way switching solenoid valve whose A and B ports are connected to the entrances and exits 5 and 6.

An annular member 12 is fixed to the outer circumference of the closed cylindrical body 2 in the longitudinal direction. The annular member 12 has an opening 15 in the wall 14 of the raw material passage 13.
Is closed, and the tip end side of the closed cylindrical body 2 having the end plate 2b is projected into the raw material passage 13. A reciprocating cylinder (17) having a piston rod (16) rigidly connected to the end plate (2a) is fixed in line with a magnetic cylinder (18). Annular member
The magnetic cylinder 18 with 12 is carried by the reciprocating cylinder 17, but the length between the end plate 2a of the closed cylindrical body 2 and the annular member 12 is made longer so that this portion can be guided by a guide member. Good.

In the above description, the stroke length of the reciprocating cylinder 17 is set to 1 or more when the entire length l of the magnetic cylinder 18 on the tip side of the annular member 12 is brought out of the raw material passage 13.
If 12 can be retracted from the wall 14 of the raw material passage for a short distance, the stroke is 1 or less. This point will be made clear in the explanation of the operation described below.

Next, the operation will be described. During the iron removing operation, the piston of the reciprocating cylinder 17 is at the leftward end, and the tip side of the closed cylindrical body 2 is exposed in the raw material passage 13 as shown in the figure, and the moving body 1 comes to the end plate 2b side. It is stationary. When the raw material including the iron pieces 8 passes through the raw material passage 13, the iron pieces 8 in the raw material are attracted by the magnetism of the moving body 1 at the tip end side of the closed tubular body 2 and suspended by suction around the closed tubular body 2. .

When the reciprocating cylinder 17 is biased to the right, the piston rod
16 moves to the right, and the magnetic cylinder 18 carrying the iron piece 8 and the like retracts along the annular member 12 through the opening 15 toward the outside of the raw material passage 13. Stop here. Next, switch the solenoid valve 7 to A
When the pressure fluid is supplied to the cylinder chamber on the side of the end plate 2b through the port 5 by connecting the port and the P port, the moving body 1 moves to the right.

(1) When the amount of retreat of the magnetic cylinder 18 is set to be shorter than the distance 1 from the illustrated annular member 12 to the end plate 2b The iron piece 8 and the like follows the circumference of the closed cylindrical body 2 as the moving body 1 moves to the right. The iron pieces 8 and the like are stopped by the annular member 12 and gathered at one place as the moving body 1 passes the position of the annular member 12. Further, when the moving body 1 moves to the right and leaves the position of the annular member 12, the magnetic force of the moving body 1 does not reach the iron piece 8 and the iron piece 8 is placed in the raw material passage having the wall 14.
It falls outside 13 and iron pieces 8 etc. are removed from the raw material and collected.

The solenoid valve 7 is switched to connect the P port and the B port to send the pressure fluid into the cylinder chamber on the side of the end plate 2a to move the moving body 1 to the left and the piston of the reciprocating cylinder 17 and the piston rod 16 to the left. A magnetic cylinder with a ring member 12
Go left 18 and restore. By repeating this, the iron pieces 8 can be selectively removed from the raw material containing the iron pieces 8 passing through the raw material passage 13. Automation is easily achieved by sequencing the above operations.

(2) Set the amount of retreat to the distance l from the illustrated annular member 12 to the end plate 2b
When the amount of retreat is smaller than the distance l, the movable body 1 of the iron piece 8 adsorbed on the end surface of the end plate 2b falls into the raw material passage 13 away from the end plate 2b. In order to avoid this, the separating member 10 shown in FIGS. 1 and 3 may be provided, but the retracting distance of the magnetic cylinder 18 is set to be larger than l, that is, the reciprocating cylinder 17
The stroke of is set to be larger than l. As a result, the iron pieces or the like 8 adsorbed on the end plate 2b are also outside the wall 14 of the raw material passage 13.
When the moving body 1 leaves from, it falls apart. The other actions are the same as the actions (1) when the retreat amount is smaller than the distance l, and therefore the description thereof is omitted. When the magnetic cylinder shown in FIG. 3 is used in the present invention, the magnetic cylinder 18 is changed to the spring offset type shown in FIG. 5, and the same piping as the piping shown in FIG. 3 is used. The description is omitted.

〔The invention's effect〕

The present invention is capable of moving a small piece of a magnetic object or a magnetic object in the longitudinal direction of the outer periphery of a closed cylindrical body, and collecting the small piece or powder at the position of an annular member and keeping it in one place, after which it is placed in a magnetic cylinder. Can be separated from. Therefore, it is possible to separate the irons in the raw material from those other than iron so that they fall to different positions.

[Brief description of drawings]

1 and 2 are vertical sectional views of a magnetic cylinder, FIGS. 3 and 4 are vertical sectional views of other magnetic cylinders, and FIG. 5 is a vertical sectional view of an embodiment of the present invention. 1 ... moving body, 2 ... closed cylindrical body, 2a, 2b ... end plate, 3
…… O-ring groove, 4 …… O-ring, 5,6 …… doorway, 7
...... Solenoid valve, 8 ...... iron piece, 9 ...... iron member, 10 ...... isolation member, 11 ...... compression coil spring, 12 ...... annular member, 13 ......
Raw material passage, 14 ... wall, 15 ... opening, 16 ... piston rod, 17 ... reciprocating cylinder, 18 ... magnetic cylinder.

Claims (1)

[Claims] 1. A movable body (1) is slidable in the longitudinal direction of a cylindrical body (2) of a non-magnetic body through which a magnetic flux of the movable body (1) having a magnetic force penetrates. In an iron removing machine equipped with a moving means for moving the moving body, an annular member (12) is fixed to the outer periphery of the tubular body (2) in the longitudinal direction, and the annular member (12) of the tubular body (2) is fixed. ) Is provided so that the tip end side of the part can be moved in and out of a raw material passage of a raw material containing iron pieces or iron powder.