JPH11187640A - Protective equipment of linear motor driving equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a protective equipment for a linear motor driving equipment which protects a linear motor from foreign matter from the outside and mechanical shock, when the motor is used under a poor condition of working environment. SOLUTION: In a linear motor driving equipment 1, a linear motor 2 in which a magnetic plate 6 installed on a base plate 11 is combined with a coil slider 5 is used, a table 7 fixed to the coil slider 5 is reciprocated, and a machine tool, a press machine and various kinds of reciprocating equipment installed in the peripheral equipment are subjected to driving control. In a protective equipment 4 of the driving equipment 1, the material of a fixed cover 15 installed on the base plate 11 constituting the equipment 4, and the material of a movable cover 16 installed on the table 7, are magnetic materials 20, and foreign matter of magnetic material from the outside is attracted by the outer surfaces of the fixed cover 15 and the movable cover 16. As a result, the operating environment between the magnetic plate 6 and the coil slider 5 are optimized, adverse effects upon the linear motor 2 are prevented, and the performance is ensured.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a protection device for a linear motor driving device for protecting against external foreign matter and mechanical shock, and particularly to a case where a linear motor is used in poor working environment conditions. The present invention also relates to a protection device for a linear motor drive device that can optimize the operating environment between a magnet plate and a coil slider that constitute a linear motor, prevent adverse effects on the linear motor, and maintain its performance. is there.

[0002]

2. Description of the Related Art A linear motor has no mechanism for converting a rotary motion into a linear motion, so that it can be positioned with high accuracy. Such conventional linear motor drive devices include a transport device using a linear motor that transports air baggage, non-ferrous metal pipes, and the like. Some are protected with a cover made of a material or the like, and are hardened with epoxy resin to protect from external foreign substances and mechanical shock.

[0003]

However, when the linear motor drive device is used in relatively poor working environment conditions, such as a machine tool, a press machine, and its peripheral devices, a cover similar to that described above is used. The main means is air blow to the magnet plate, and there is no effective protection device for protecting against external foreign matter and mechanical shock. In particular, in recent years, in order to improve the performance of magnets due to the reduction in weight and size of linear motors, a protection device for a linear motor drive device that is effective to protect against such foreign matter and mechanical shock is required. .

An object of the present invention is to solve the above-mentioned problems and to provide a protection device for a linear motor drive device that protects against external foreign matter and mechanical shock even when used in poor working environment conditions. To provide.

[0005]

In order to solve the above-mentioned problems, the present invention reciprocates a table fixed to a coil slider by using a linear motor in which a magnet plate provided on a base plate and a coil slider are combined. In the protection device of the linear motor drive device for driving and controlling various reciprocating devices provided on the machine tool and the press machine and the peripheral devices to be connected, the protection device is provided on the fixed cover and the table provided on the base plate constituting the protection device. The material of the movable cover is a magnetic material. Alternatively, the material of the fixed cover and the movable cover that constitute the protection device is such that the entire outer surface is a magnetic thin plate and the entire inner surface is laminated with magnetic material, or the entire outer surface is a magnetic thin plate and the inner surface is partially coated with magnetic material at an arbitrary interval. Fixed and configured.

Further, the material of the fixed cover and the movable cover is formed by laminating a magnetic material on the entire outer surface and a non-magnetic thin plate on the entire inner surface. Alternatively, the material of the fixed cover and the movable cover that constitute the protective device is made of an electromagnet on the outer surface and a non-magnetic thin plate that is not affected by magnetic force, and the external magnet can be detached by the excitation control of the electromagnet. I do.

Further, the material of the fixed cover and the movable cover constituting the protection device is constituted by an arbitrary combination of the above-mentioned materials.

[0008]

FIG. 1 shows an embodiment of a protection device for a linear motor driving device according to the present invention. As shown in FIG. 1, the linear motor driving device 1 includes a linear motor 2
, A drive control device 3 and a protection device 4.

The linear motor 2 is composed of two basic parts: a coil slider 5 in which a coil winding and a cooling part thereof are integrated, and a magnet plate 6 for generating a magnetic field. Coil slider 5
A forced cooling pipe is buried in the vicinity of the coil winding, which is a heat source, so that heat can be efficiently discharged to the outside. The influence on the driving device 1 and peripheral devices is minimized.

The drive control device 3 includes a table 7 having a coil slider 5 and guide plates 9 and 9 fixed on a lower surface and a connecting member 8 on an upper surface, and a base plate 11 having a magnet plate 6 fixed on an upper surface. Is provided. Further, on the upper surface of the base plate 11, there are fixedly provided guide rails 12 and 12 which engage with the guide plates 9 and 9 to guide the table 7 movably and a linear scale 13 which detects the moving position of the table 7. In addition, a cable carrier 14 for supplying a current to the coil slider 5 movably in accordance with the movement of the table 7 is provided.

The protection device 4 includes a fixed cover 15 and a movable cover 16. The fixed cover 15 is fixed to the base plate 11 and cut out in accordance with the amount of movement of the connecting member 8 of the table 7, and its opening 15A is trimmed upward to prevent foreign matter from entering from outside. Have been. The movable cover 16 is connected to the connecting member 8 of the table 7.
And is movable by engaging with the opening 15A of the fixed cover 15.

The fixed cover 15 and the movable cover 16 are made of a magnetic material 20 to protect foreign matter from entering from outside.
The operating environment between the magnet plate 6 and the coil slider 5 constituting the linear motor 2 is optimized by protecting against a mechanical shock and adsorbing foreign matter of a magnetic material from the outside onto the outer surfaces of the fixed cover 15 and the movable cover 16. To prevent adverse effects on the linear motor 2 and maintain its performance.
The foreign matter of the magnetic material adsorbed on the outer surfaces of the fixed cover 15 and the movable cover 16 is removed by an operator at the time of daily inspection or the like.

As shown in FIG. 2A, the fixed cover 15 and the movable cover 16 may be formed by laminating a magnetic thin plate 23 on the entire outer surface and a magnetic material 20 on the entire inner surface as shown in FIG. As shown in ()), the magnetic material 20A may be partially fixed on the entire outer surface with a magnetic thin plate 23 at an arbitrary interval on the inner surface. Further, as shown in FIG. 2 (c), the outer surface is made up of an electromagnet 24 and the inner surface is made of a non-magnetic thin plate 25 which is not affected by magnetic force. It is also possible to increase the efficiency of the work of removing foreign matter by the user. Alternatively, as shown in FIG. 2D, various combinations are possible, for example, the entire outer surface is made of a magnetic material 20 and the entire inner surface is made of a laminated non-magnetic thin plate 25.

As shown in FIG. 1, the other end 21A of the drive rod 21 whose one end is connected to a connecting portion of various reciprocating devices (not shown) is connected to the connecting member 8 of the table 7 of the linear motor driving device 1 by a pin. The reciprocating device is driven and controlled by the linear motor driving device 1 connected as described above and configured as described above.

As an example, FIG. 3 shows a feed bar driving device 30 of a transfer device using the linear motor driving device 1 described above. As shown in FIG. 2, a feed bar 33 that sequentially conveys a work (not shown) to a processing stage of a press machine is guided by a feed bar receiver 34 provided on the clamp unit 31 and slidably engages. A pin 35 is erected at the end of the feed bar 33,
The feed bar 33 is connected via a link 36 to a pin 37 erected on a moving body 38 slidably fitted on a guide rod 40 provided on the unit case 32. In the unit case 32, the above-described linear motor driving device 1 is provided internally, and a connecting member 39 provided below the moving body 38 and a connecting member 8 of the linear motor driving device 1 are connected by the pins 22 to form the feed bar 33. A feed bar driving device 30 that performs an advance return operation is configured.

In the embodiment shown in FIG. 1, the connecting member 8 of the linear motor driving device 1 and the connecting member of the reciprocating device are connected via the driving rod 21, but as in this embodiment. The connecting member 8 of the linear motor driving device 1 and the connecting member 39 of the reciprocating device 30 do not pass through the driving rod 21.
And may be directly connected. Further, as in the present embodiment, a configuration may be employed in which the connecting member 8 is not provided on the table 7 and the table of the linear motor driving device and the reciprocating device are directly engaged.

[0017]

As is apparent from the above description, according to the present invention, intrusion of foreign matter from the outside is prevented, mechanical shock is prevented, and foreign matter of a magnetic material from the outside is fixed and movable. By adsorbing to the outer surface of the cover, the operating environment between the magnet plate and the coil slider constituting the linear motor can be optimized, adverse effects on the linear motor can be prevented, and the performance can be maintained. The outer surface of the fixed cover and the movable cover is made of an electromagnet, and the inner surface is made of a non-magnetic thin plate which is not affected by magnetic force. Work efficiency can be improved.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a protection device for a linear motor drive device according to an embodiment of the present invention.

FIG. 2 is an explanatory view of a material forming a fixed cover and a movable cover.

FIG. 3 is a front sectional view of a main part of a feed bar driving device of a transfer device using the linear motor driving device of the embodiment.

[Explanation of symbols]

1 is a linear motor drive device, 2 is a linear motor, 3 is a drive control device, 4 is a protection device, 5 is a coil slider, 6 is a magnet plate, 7 is a table, 8 is a connecting member, 9 is a guide plate, and 11 is a base plate. , 12 are guide rails, 1
3 is a linear scale, 14 is a cable carrier, 15 is a fixed cover, 15A is an opening, 16 is a movable cover, 17
, 18, 19, 20 and 20 A are magnetic materials, 21 is a drive rod, 21 A is the other end, 22 is a pin, 23 is a magnetic thin plate, 24 is an electromagnet, 25 is a non-magnetic thin plate, and 30 is a feed bar drive Apparatus, 31 is a clamp unit, 32 is a unit case, 33 is a feed bar, 34 is a feed bar receiver, 35 and 37 are pins, 36 is a link, 38 is a moving body, 39 is a connecting member, and 40 is a guide rod. .

Claims (5)

[Claims] 1. A table which is fixed to a coil slider is reciprocated by using a linear motor in which a magnet plate and a coil slider provided on a base plate are combined. In a linear motor drive protection device for driving and controlling various moving devices, a magnetic material is used as a material of a fixed cover provided on a base plate and a movable cover provided on a table constituting the protection device. Drive protection device. 2. The material according to claim 1, wherein the material of the fixed cover and the movable cover constituting the protective device is selected from the group consisting of a magnetic thin plate on the entire outer surface and a magnetic material laminated on the entire inner surface, or a magnetic thin plate on the entire outer surface. A protection device for a linear motor drive device, wherein a magnetic material is partially fixed at intervals. 3. The linear motor driving device according to claim 1, wherein the material of the fixed cover and the movable cover constituting the protection device is a laminate of a magnetic material on the entire outer surface and a non-magnetic thin plate on the entire inner surface. Protective equipment. 4. The apparatus according to claim 1, wherein the material of the fixed cover and the movable cover constituting the protection device is constituted by an electromagnet on the outer surface and a non-magnetic thin plate on the inner surface which is not affected by a magnetic force. A protection device for a linear motor drive device, characterized in that a foreign matter from the device is detachable. 5. A machine tool and a press machine for reciprocating and connecting a table fixed to a coil slider using a linear motor in which a magnet plate provided on a base plate and a coil slider are combined, and reciprocations provided on peripheral devices thereof. In a protection device for a linear motor driving device for controlling the driving of various moving devices, the material of the fixed cover and the movable cover constituting the protection device is constituted by an arbitrary combination of the materials of claims 1 to 4. A protection device for a linear motor drive device.