JP2003334765A - Work placing table - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a work placing table for easily supporting a deformed work, and supporting the work without damaging the work. <P>SOLUTION: This work placing table 1 comprises a magnet body 10 having a main pole 12, a coil 13, an auxiliary pole 14 and a plurality of movable yokes 15, and a support table 20 for rotatably supporting the magnet body 10. A hook member 31 is installed at the tip of the movable yoke 15, and a work is placed on the tip of the movable yoke 15 via the hook member 31 so that the movable yoke 15 moves downward along the shape of a work under surface. The downward moved movable yoke 15 is formed with magnetic circuits at the main pole 12, the movable yoke 15 and the auxiliary pole 14 by the current- carrying of the coil 13, and adsorbed at positions thereof. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a work table for supporting a lower surface of a workpiece having a different shape, and more specifically, it includes a magnet body in which a plurality of movable yokes are arranged so as to be movable along the shape of the lower surface of the work. Regarding the work stand.

[0002]

2. Description of the Related Art Conventionally, when a work is machined, the work conveyed to a working machine is once placed on a work stand placed near the working machine after the completion of the previous process. When this work has an irregular surface and the irregular surface is placed as the lower surface, the work table is equipped with pins with different heights according to the shape of the workpiece, and the lower surface of the workpiece is supported by the pins. I was trying to do it. However, for this purpose, a dedicated jig corresponding to the work must be manufactured, and various jigs are required in the case of high-mix low-volume production, so the jig production cost is high. In addition to the need for a jig storage warehouse, jig management has become complicated. Therefore, as shown in JP-A-4-38679, there is provided a movable yoke type lifting magnet configured so that a plurality of movable yokes can be moved according to the shape of a work by electromagnetic force and can be attracted at appropriate positions. Was there.

This lifting magnet is provided with a main pole, a coil surrounding the main pole, and a plurality of movable yokes movable with respect to the main pole. By forming a magnetic circuit between the work and the work, the work is sucked and held, and lifted, so that the work can be conveyed to the processing machine.

[0004]

However, in the conventional movable yoke type lifting magnet, since the work is attracted and held and can be lifted and conveyed, the movable yoke and the work directly generate a magnetic circuit. Was configured to come into contact.

When the work is made of a resin material or the surface of the work is coated, the work is made of a metal material and is made of a magnetic material. It is easily scratched. Since the commercial value of the work is reduced or the work becomes unusable due to the damage, the work must be conveyed to the processing machine without damaging the work.

The present invention solves the above-mentioned problems, and provides a work stand on which a work can be placed without damaging it in order to convey the work to the next process without damaging the work. With the goal.

[0007]

A work rest according to the present invention is configured as follows in order to solve the above-mentioned problems. That is, a main pole and an auxiliary pole, a coil that winds the main pole, and a plurality of movable yokes that can move with respect to the main pole are provided, and the tip of the movable yoke follows the outer shape of the workpiece. And a movable base that supports the magnet body, and the movable yoke includes a main pole, a movable yoke, and an auxiliary pole. Is attracted and held by a magnetic circuit formed between the movable yoke and the movable yoke, and the movable yoke tip is disposed above the magnet body to support the lower surface of the workpiece, and the workpiece and the movable yoke tip are provided. A protective member made of a non-magnetic material for protecting the lower surface of the work is disposed between them.

Further, it is preferable that the magnet body is supported rotatably in a horizontal direction with respect to the support base.

Further, the magnet body may be supported so as to be vertically swingable with respect to the support base.

Further, it is more preferable that the movable magnet is biased upward by the biasing means.

[0011]

According to the first aspect of the present invention, when the work is supported by the work rest, the lower surface of the work is brought into contact with the protection member arranged at the tip of the movable yoke to move the work. Depending on the weight of the workpiece, the yoke
It is moved to a position that follows the shape of the lower surface of the work. When the coil is energized at this position, a magnetic flux flows between the main pole, the movable yoke and the auxiliary pole to form a magnetic circuit. by this,
The movable yoke is suction-held and fixed at that position. On the other hand, since a non-magnetic protective member is interposed between the main pole, the movable yoke, and the work, the magnetic flux does not flow and a magnetic circuit is not generated. However, the work is stably supported by the movable yoke that is moved downward at a position following the shape of the lower surface of the work. Moreover, since the lower surface of the work is directly contacted by the protective member, the lower surface of the work is not scratched.

According to the second aspect of the invention, the work can be stably supported by appropriately rotating the magnet body in the horizontal direction with respect to the support base in accordance with the shape of the work. For example, if the shape of the work is formed to be long in one direction, the work can be stably supported by arranging a large number of movable yokes in the short direction of the work.

According to the third aspect of the invention, the work can be stably supported by appropriately swinging the magnet body in the vertical direction with respect to the support base in accordance with the shape of the work. For example, if the work is deeply formed in the vertical direction, the magnet body is used as a support base so that the movable works arranged at both ends of the magnet body can be brought into contact with each other at the low position and the high position of the work. By oscillating with respect to each other, the work can be stably supported.

According to the fourth aspect of the present invention, since the movable yoke is constantly urged toward the work side by the urging means when the work is placed, the movable yoke is moved downward by the weight of the work. However, the movable yokes can support the work by coming into contact with the work by the urging force of the urging means. Moreover, when the work is removed from the work rest, the movable yoke can be instantly returned to the original position by the biasing means. It can be moved down along the shape.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below with reference to the drawings.

As shown in FIGS. 1 to 4, the work table 1 of the embodiment is arranged as a magnet body 10 in a state in which a conventional movable yoke type lifting magnet is turned upside down. The magnet body 10 includes a main pole 12 formed of a magnetic body, a coil 13 arranged so as to surround the main pole 12, an auxiliary pole 14 of a magnetic body arranged below the coil 13, and a main pole. The main pole 12, the coil 13, and the auxiliary pole 14 are provided on both sides in the longitudinal direction of the coil 12, the auxiliary pole 14, and the coil 13.
And an operating yoke 15 made of a plurality of magnetic bodies arranged in parallel along both side surfaces of the. The main pole 12 and the auxiliary pole 14 are fixed by a support frame 11 that supports the main pole 12 and the auxiliary pole 14 on both front and rear sides and upper and lower sides, and as shown by the chain double-dashed line in FIG. A magnetic circuit is formed between the pole 12, the movable yoke 15, and the auxiliary pole 14.

The support frame 11 in the embodiment is the coil 1
Upper side support frame 1 disposed on the upper side of both side surfaces in the longitudinal direction of 3
11, a side lower support frame 112 arranged near both side surfaces of the auxiliary pole 14 in the longitudinal direction, an upper support frame 113 arranged on the upper surface of the coil 13, and a lower support frame 114 arranged on the lower surface of the auxiliary pole 14. The coil 13 includes vertical support frames 115, 115 (see FIG. 3) arranged at both ends in the longitudinal direction, and the support yokes are connected to form a frame body, and the movable yoke 15 is connected to the main pole 12. The coil 13 and the auxiliary pole 14 are attached so as to surround the side surfaces of the coil 13 and the auxiliary pole 14 so as to be vertically movable (see FIGS. 1 and 4).

A pin 16 is provided on the back surface of the movable yoke 15 at a substantially central portion thereof, and the pin 16 comes into contact with the lower side support frame 112 to serve as a stopper for restricting the lower end of the movable yoke 15. Is playing. A locking piece 17 is arranged at the lower end of the back surface of the movable yoke 15 and is formed so as to be locked on the lower surface of the side lower support frame 112. And. It acts as a stopper that regulates the upper end of the movable yoke 15 by the urging force of a coil spring 18 described later.

Further, on the back surface of the movable yoke 15, there is arranged a coil spring 18 having one end locked to the upper side support frame 111 and the other end locked to the locking piece 17 of the movable yoke 15. 15 is always biased upward.

A support table 20 is connected below the magnet body 10, and together with the magnet body 10 constitutes a work stand 1. In the first embodiment, the connection structure between the magnet body 10 and the support base 20 is screwed into a female screw portion 112a (see FIG. 4) formed in the central portion of the side lower support frame 112, as shown in FIG. The male screw portion 21 is formed on the upper portion of the shaft portion 22, and the magnet body 10 is configured to be rotatable in the horizontal direction with respect to the support base 20A.
The support base 20 and the support base 20 can be locked by a lock nut 23 after they are screwed together. That is, by loosening the lock nut 23, the magnet body 10 is rotated in the horizontal direction, rotated to a predetermined position, and then fixed by the lock nut 23. Of course, the magnet body 10 and the support base 20A are not limited to the above, and may be configured to be rotatable via bearings.

The magnet body 10 based on the support 20A
In the connection structure with, since the magnet body 10 is configured to be rotatable in the horizontal direction, for example, if the work is formed to have a long shape in one direction, the work is formed along the longitudinal direction of the work. By arranging the work holders 1 in parallel and rotating the magnet body 10 so that a plurality of movable yokes 15 of each work holder 1 can be arranged in the lateral direction of the work, the work can be stably supported. it can.

In the second embodiment of the connecting structure of the magnet body 10 and the support 20, as shown in FIG. 5, the female screw 112a formed in the substantially central portion of the auxiliary pole 14 has the male screw portion 25a at the upper portion. The mounting member 25 having a U-shape is formed by screwing the supporting base 2 into the U-shaped portion 25b of the mounting member 25.
The OB upper mounting portion 26 is fitted. Then, the mounting member 25 and the upper mounting portion 26 of the support base 20 are connected to the pin 27.
The magnet body 10 is configured to be vertically swingable by being pivotally supported by.

The magnet body 10 based on this support 20B
In the connection structure with, since the magnet body 10 is configured to be swingable in the vertical direction, for example, if the depth of the work is deep, the low position and the high position of the work can be set. By arranging the movable yokes 15 at both ends so as to face each other, when the work is placed, the magnet body 10 can swing with respect to the support base 20B in accordance with the shape of the work, and the work is stabilized. Can be supported.

A protective member 30 is attached to the tip of the movable yoke 15 and is brought into contact with the lower surface side of the work. The protection member 30 is attached so as to cover the tip (upper end) of the movable yoke 15 so as not to damage the contact surface with the work. As for the specific shape of the protective member, in the protective member 30 according to the first embodiment, as shown in FIG. 1 or 2,
The hook member 31 is made of resin and can be engaged with the tip of each movable yoke 15 from the inner surface of the movable yoke 15 toward the back side. It is desirable that it be formed in an arc shape so that it can surely abut. Since the resin hook member 31 is a non-magnetic material, magnetic flux does not flow between the hook member 31 and the movable yoke while supporting the workpiece, and a magnetic circuit is not generated.

As shown in FIG. 6, the protective member 30 according to the second embodiment is formed of a rubber sheet material 32 that covers the tip surfaces of all the movable yokes 15. Rubber sheet material 32
Is a vertical support frame 1 arranged at both ends of the coil 13 in the longitudinal direction.
Both ends are fixed to brackets 116 and 116 extending from the thickness of the coil 13 along the thickness direction of the coil 13 and wound so as to cover the distal ends of all the movable yokes 15 along the longitudinal direction.

Next, the operation of the work stand 1 configured as described above will be described with reference to FIG.

A plurality of work holders 1 are attached to a base plate (not shown) at appropriate positions according to the size of the work W. For the plurality of work rests 1, either a support base 20A for horizontally rotating the magnet body 10 or a support base 20B for vertically swinging the magnet body 10 is appropriately selected according to the shape of the work W. It may be arranged at any position or all of either one of the supports may be arranged.

The base plate is installed near the processing machine at a position where the work can be easily conveyed. Then, the work W is transported by another transport means and placed on the plurality of work rests 1.

When the workpiece W is placed on the workpiece holder 1, each movable yoke 15 resists the biasing force of the coil spring 18 and the shape of the workpiece W while the coil 13 of the workpiece holder 1 is not energized. Is descended following. At this time, if the magnet body 10 is a work table 1 of a type that can be horizontally rotated with respect to the support table 20A, the magnet body 1
0 is rotated in advance according to an appropriate shape of the work W, and if the magnet body 10 is a work table 1 of a type that can swing vertically with respect to the support table 20B, the work W is placed. When this occurs, the workpiece W is swung following the shape of the workpiece.

When the work W is placed, the movable yokes 1 are moved down following the shape of the work W.
The tip of the coil 5 is in contact with the lower surface of the work W via the protective member 30 by the urging force of the coil spring 18, and when the coil 13 is energized in this state, the main pole 12 and the movable yoke 15 are moved to the auxiliary pole 14. The magnetic flux flows to form a magnetic circuit.
Due to the formation of the magnetic circuit, the movable yoke 15 becomes the main pole 12.
It is attracted to the auxiliary electrode 14 and fixed at a position where it is moved down following the work W. Thereby, the work W is stably supported.

On the other hand, a non-magnetic protective member 30 (hook member 3) is provided between the main pole 12, the movable yoke 15 and the work W.
1 or the rubber sheet 32) is interposed, no magnetic flux flows and no magnetic circuit is generated.

As described above, the work holder 1 according to the embodiment.
According to the above, when mounting the work W on the work stand 1,
The movable yokes 15 move downward in accordance with the shape of the work W due to the weight of the work W,
Can be supported. At this time, coil 1 at this position
3 is energized to move the movable yoke 15 to the main pole 1.
2. The work W can be stably supported because it is attracted and fixed by the magnetic force formed on the movable yoke 15 and the auxiliary pole 14.

Since the protective member 30 is provided at the tip of the movable yoke 15, the work W mounting surface can be protected without damaging it. Moreover, the work W is supported in a stable state by the movable yoke 15 which is moved downward at a position matching the shape of the lower surface of the work W.

In the work holder 1, according to the shape of the work, the magnet body 10 is appropriately rotated in the horizontal direction with respect to the support base 20A, and is shaken in the vertical direction with respect to the support base 20B. Can be moved and worn, work W
The work W can be stably supported regardless of the shape of the.

Moreover, when the work W is placed, the movable yoke 15 is always urged toward the work W by the coil spring 18, so that each movable yoke 15 is placed.
The work W can be supported by abutting against the work W by the biasing force of the coil spring 18. Further, since the movable yoke 15 can be instantly returned to its original position by the coil spring 18 when the work W is removed from the work stand 1, the movable yoke 15 can be supported when the next work is supported. Can be promptly moved downward along the shape of the work W.

The work holder of the present invention is not limited to the above-mentioned form, and for example, the protective member interposed between the work lower surface and the movable yoke may be elastic. For example, another member may be used, for example, a rubber member may be attached to the tip of each movable yoke, or a resin elastomer may be attached.

Further, the connecting structure of the magnet body and the support base may be constructed, for example, so that the magnet body can move vertically with respect to the support base.

[Brief description of drawings]

FIG. 1 is a perspective view of a work stand showing one embodiment of the present invention.

FIG. 2 is a main cross-sectional view showing a magnetic circuit of the work stand in FIG.

FIG. 3 is a front view of the same.

FIG. 4 is a bottom view of the same.

FIG. 5 is a cross-sectional view showing another attachment structure of the magnet body and the support base.

FIG. 6 is a perspective view showing a work table on which another protective member is attached.

FIG. 7 is a perspective view showing a work table on which a work is placed.

[Explanation of symbols]

1 Work stand 10 magnet body 11 Support frame 12 main poles 13 coils 14 auxiliary pole 15 movable yoke 18 Coil spring (biasing means) 20 Support 30 Protective material 31 Hook member (protective member) 32 Rubber sheet material (protection member) W work

Claims (4)

[Claims] 1. A main pole, an auxiliary pole, a coil for winding the main pole, and a plurality of movable yokes movable with respect to the main pole, and a tip of the movable yoke has an outer shape of a work. A workpiece holder comprising: a magnet body that is movably arranged according to the above; and a support base that supports the magnet body, wherein the movable yoke is a main pole, a movable yoke, Adsorbed and held by a magnetic circuit formed between the auxiliary pole, the movable yoke tip is arranged above the magnet body to support the lower surface of the work, and
A work holder, wherein a protection member made of a non-magnetic material for protecting the lower surface of the work is disposed between the work and the tip of the movable yoke. 2. The work table according to claim 1, wherein the magnet body is supported rotatably in a horizontal direction with respect to the support table. 3. The work table according to claim 1, wherein the magnet body is supported so as to be swingable in a vertical direction with respect to the support table. 4. The work table according to claim 1, wherein the movable magnet is biased upward by a biasing means.