JP2000215507A - Apparatus for feeding magnet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a device for feeding magnets so as to be constituted in a small size, at the same time to be decreased in equipment cost, and further to be made easy in checking and adjusting the position of feeding magnets. SOLUTION: This apparatus contains a magnet feeding part 11 to feed magnets in two rows, a magnet segmenting part 20 to make segments of each rows of magnets fed from the magnet feeding part, a feeding head 30 made of a nonmagnetic body which holds the magnets of each row divided into segments by the magnet segmenting part at a prescribed interval and transfers it onto the inner surface of a part Y which is fixedly held opposing to each other, and the feeding head is equipped with a flat head body 34 provided on its both the surfaces with a pair of holding grooves each extending in the direction of feeding of magnets and equipped with a pair of holding member 35, comprising a nonmagnetic body provided freely movable forwards and backwards in each of the holding grooves.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnet supply device for supplying a magnet to a pair of opposing inner surfaces of a component made of a magnetic material, and more particularly to a magnet supply device for supplying a magnet to a yoke inner surface of an optical pickup. It relates to a suitable magnet supply device.

[0002]

2. Description of the Related Art In general, when assembling an optical pickup, a yoke made of a magnetic material and having a substantially U-shaped cross section includes a step of attaching magnets to a pair of inner surfaces facing each other. Conventionally, in such a magnet mounting process, a magnet supply device having one magnet insertion portion on each side of a magnet supply position with respect to a yoke has been used.

In such a magnet supply device, two devices having the same configuration are used at the same time. That is, for example, a pair of magnets input from the magnet input portions of the magnet supply devices on both sides are cut out by a total of two actuators provided in each magnet supply device, and pushed into the yoke. Then, the center plate of the actuator holding the magnet pushed into the yoke is pulled out, and the magnet is supplied to inner surfaces of the yoke facing each other by leaving the magnet at a predetermined position in the yoke. .

[0004]

However, since such a magnet supply device is constructed so as to extend to both sides from the magnet supply position, it becomes large as a whole, and magnet input portions are provided on both sides. Thus, two sets of magnet supply devices provided with actuators are required, and there is a problem that equipment costs are increased.

Further, since two sets of magnet supply devices are disposed on both sides of the magnet supply position, it is difficult to confirm and adjust the supply position during the magnet supply operation. Since the center plate is pulled out as described above, there is a problem that when the head of the actuator is pulled out, a part of the head may come into contact with the magnet or the position of the magnet may be shifted due to magnetic attraction.

SUMMARY OF THE INVENTION In view of the above, the present invention provides a magnet supply device which is small in size, reduces equipment costs, and facilitates confirmation and adjustment of a magnet supply position. It is an object.

[0007]

SUMMARY OF THE INVENTION According to the first aspect of the present invention, there is provided a magnet insertion section for inputting a plurality of rows of magnets, and a magnet cutout section for cutting out each row of magnets input by the magnet insertion section. And a supply head made of a non-magnetic material that holds the magnets of each row cut out by the magnet cut-out portion at predetermined intervals and moves to the inner surfaces of the fixedly held components facing each other. A magnet supply, comprising: a flat head main body having a pair of holding grooves extending in the magnet supply direction on both surfaces thereof; and a plurality of holding members made of a non-magnetic material provided to be able to advance and retreat in each holding groove. This is achieved by the device.

According to another aspect of the present invention, there is provided a magnet input unit for inputting magnets in two rows,
The magnet cutout section that cuts out each row of magnets thrown in by the magnet throwing section, and the magnets of each row cut out by the magnet cutout section are held at predetermined intervals, and the fixed and held optical pickup yokes face each other. A supply head made of a non-magnetic material that moves to the inner surface to be moved, and the supply head includes a flat head body having a pair of holding grooves extending in the magnet supply direction on both surfaces, and the inside of each holding groove. The present invention is achieved by a magnet supply device including a pair of holding members made of a non-magnetic material provided so as to be able to advance and retreat.

According to the configuration of the first aspect, the magnets input in a plurality of rows by the magnet input section are cut out by the magnet cutout section for each row. When the supply head receives the magnets in the plurality of holding grooves, the plurality of magnets are held at predetermined intervals in the holding grooves by mutual magnetic attraction. From this state, the supply head moves to the inner surfaces of the parts to which the magnets are to be supplied, and the magnets held in the holding grooves of the head main body are respectively approached and opposed to the inner surfaces of the parts. You. Here, when each magnet approaches the inner surface of the component, the magnetic attraction to the inner surface of the component becomes larger than the magnetic attraction between the magnets, and magnetically attracts to the inner surface of the component.

When the supply head is further inserted between the inner surfaces of the components, the holding member pushes each magnet between the inner surfaces of the components, and the entire magnet faces the inner surface of the component. Thereafter, the head main body of the supply head is retracted in a state where the holding member is stationary (that is, each magnet is held in the forward and backward directions). As a result, each magnet faces the inner surface of the component and is magnetically attracted, and is held by the holding member.
Then, only the head body of the supply head is pulled out.
At this time, since the magnets are held by the holding members, there is no possibility that the magnets are displaced on the inner surface of the component when the head body is pulled out. Finally, when the holding member of the supply head is retracted, the component supply to the inner surface of the component of the magnet is completed.

As described above, according to the first aspect of the present invention, the magnets are supplied in two rows by the magnet input section, and a pair of magnets to be supplied to one component, for example, the yoke of the optical pickup, is supplied from the magnet input section. It is cut out by one magnet cut-out portion, and is further supplied to the mutually facing inner surfaces of the component (yoke) by one supply head. Thus, the supply of the pair of magnets to the component (yoke) is performed by one magnet input unit, one magnet cutout unit, and one supply head.

Further, since the supply head is formed separately from the magnet cutout portion, and only one set of the magnet insertion portion, the magnet cutout portion and the supply head are provided around the supply position. Confirmation and adjustment of the supply position of the supply head can be easily performed.

Further, when the supply head is pulled out, since the magnet is held by the holding member, the displacement of the magnet due to the pulling out of the supply head is suppressed, so that the magnet is fixed on the inner surface of the component (yoke). The position is reliably supplied and held.

According to the configuration of the second aspect of the present invention, the magnet insertion portions are arranged in two parallel input grooves for inputting the magnets of each row, respectively, and in each of the input grooves. And a pushing block that pushes the magnet in the loading direction, it is possible to supply two rows of magnets with a simple configuration.

According to the third aspect of the present invention, the magnet cut-out portion pushes the magnet laterally with respect to the longitudinal direction of the groove at the input side end of each input groove of the magnet input portion. In the case where a cutting block to be cut out and one actuator for driving these two cutting blocks are provided, only one actuator is required to cut out the magnets in each row.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to FIGS.
The embodiment described below is a preferred specific example of the present invention, and thus various technically preferable limitations are added. However, the scope of the present invention particularly limits the present invention in the following description. The embodiment is not limited to these embodiments unless otherwise stated.

FIG. 1 shows an embodiment of a magnet supply device according to the present invention. In FIG. 1, a magnet supply device 10 supplies magnets to inner surfaces of a yoke of an optical pickup, for example, facing each other. The magnet supply unit 11, the magnet cutout unit 20, the supply head 30, the holding head, and the like are provided. Table 4
0 and a control unit 50. In this embodiment,
As an example of a configuration in which a plurality of magnets are handled at the same time, a device that handles two rows is used.

As shown in FIG. 2 showing a schematic structure from the bottom side in FIG. 1, a plurality of, in this case two, magnet insertion portions 11 are formed on the upper surface of the insertion portion main body 12, as shown in FIG. Input grooves 13, 14, and each input groove 13,
A plurality of push-in blocks 1 that push the magnets disposed in 14 in the closing direction (the direction of arrow A in FIG. 2).
5 and 16 and a pushing cylinder 17 for pushing these pushing blocks 15 and 16 in the loading direction.

The input grooves 13 and 14 accommodate a plurality of magnets M1 and M2 to be supplied, respectively, in a state where the magnets M1 and M2 are supplied to each other, and their width is slightly smaller than the widths of the magnets M1 and M2, respectively. Largely selected. The input grooves 13 and 14 are set such that their ends in the input direction are separated from each other by a distance substantially equal to a predetermined interval when they are held by the supply head 30 at the magnet cutout section 20 shown in FIG. ing.

Each of the pushing blocks 15 and 16 is moved along the guide rails 15a and 16a (see FIG. 2) in the loading direction A.
And slidably supported by the
b, 16b, the movable part 17a of the pushing cylinder 17
Stretched against. Thus, when the movable portion 17a of the pushing cylinder 17 moves in the closing direction, the pushing blocks 15, 16 are moved by the springs 15b, 16 respectively.
b to be pushed in the closing direction.

As shown in FIGS. 1 and 3, the magnet cut-out portion 20 is disposed near an end of the input portion main body 12 on the input side.
14 and the magnets disposed in the respective cut-out grooves 21 and 22 are cut out in the cut-out direction (the direction of arrow B in FIG. 3). ), And the cutting blocks 23, 24 that are pushed toward
4 is provided in the cutting direction B. The actuator 25 is a pushing means for pushing a plurality of blocks in a cutting direction.

The width of the cutout grooves 21 and 22 is
The thickness of each of the magnets M1 and M2 to be supplied is selected to be slightly larger than the thickness in the input direction. Each of the cutout grooves 21 and 22 has an end in the cutout direction shown in FIG.
As shown in FIG. 2, the opening portion main body 12 is open at the side edge.

Each of the cutout blocks 23 and 24 is slidably supported in the cutout direction B, and the cutout block 23 is formed longer than the cutout block 24 in the pushing direction. 24
a is urged in the direction opposite to the cutting direction B.
Here, the spring 23a is stretched over the movable portion of the actuator 25, and the spring 24a is stretched over the insertion portion main body 12 or the cutout block 23. Further, the cutout block 24 is engaged with a pin 23 b protruding from the cutout block 23.

Thus, when the movable portion 25a of the actuator 25 advances in the cutting direction B, the cutting block 23 is pushed in the cutting direction B against the tension of the spring 23a, and the cutting block 24
The pin 23b of the cutout block 23 is pushed in the cutout direction B against the tension a.
At this time, when the pin 23b of the cutout block 23 pushes the cutout block 24, both the cutout blocks 23 and 24 are moved in the cutout direction.
The tips are aligned. When the movable portion 25a of the actuator 25 is retracted in the cutting direction B, each of the cutting blocks 23 and 24
3a, 24a, and retreats based on the tension of the input grooves 13,
14 will be retracted outside.

As shown in FIG. 1, the supply head 30 has a fixed support 31, a movable portion 32 supported vertically movably with respect to the support 31, and a swinging motion with respect to the movable portion 32. It includes a rotator 33 movably supported, a head body 34 attached to the rotator 33, and a pair of holding members 35 supported movably with respect to the head body 34.

Here, the head body 34 is rotated by the rotation of the rotating part 33, and the yoke of the optical pick-up (fixed and held on the lower holding table 40 from the cut-out position facing the magnet cut-out part 20 in FIG. 1). (Not shown) in the direction of arrow C.

The head body 34 is made of a non-magnetic material and is flat, and is supported by the rotating part 33 so as to be able to advance and retreat in the radial direction from its rotation axis.
As shown in FIG. 3, a pair of holding grooves 34a and 34b are provided on both surfaces thereof, each extending in the magnet supply direction. On the other hand, as shown in FIG.
5 and 35 are made of a non-magnetic material, and as shown in FIGS.
In 4a, 34b, it is arrange | positioned so that it can advance and retreat in the longitudinal direction. The control unit 50 is connected to each of the above-described operation units, and performs control for operating the magnet supply device 10 as described later.

The magnet supply device 10 according to the present embodiment
Is configured as described above, and operates as follows when magnets are supplied to the opposing inner surfaces of the yoke of the optical pickup.

First, each input groove 1 of the magnet input section 11
Each of the plurality of magnets M1, M2 in the
Are stored, and the pushing blocks 15, 16 are pushed in the loading direction by the pushing cylinder 17 via the springs 15b, 16b, so that the magnets M1, M2 located at the leading end in the loading direction are moved into the loading grooves 13, 14. Abuts the end in the loading direction. As a result, the magnets M1 and M2 are supplied in two rows.

When the actuator 25 of the magnet cutting section 20 operates and the movable section 25a moves in the cutting direction, the cutting blocks 23 and 24 retracted to the outside of the input grooves 13 and 14 are moved into the input grooves. 13,
14 is a magnet M at the tip which is in contact with the end of the loading direction.
1, M2 is pushed in the lateral direction to cut out the cutout grooves 21 and 22 into the open ends of the cutout grooves 21 and 22. here,
When the movable portion 25a of the actuator 25 moves in the reverse direction, the cutout blocks 23 and 24 return to the retracted positions outside the insertion grooves 13 and 14, and the pushing cylinder 17 of the magnet insertion portion 11 operates, When the movable portion 17a moves in the loading direction, each of the loading grooves 1 is moved.
The magnets M1 and M2 next to the magnets M1 and M2 housed in the slots 3 and 14 are brought into contact with the ends of the slots 13 and 14 in the loading direction.

A pair of magnets M1 and M2 cut out by the magnet cutout portion 20 at the open ends of the cutout grooves 21 and 22 are formed as shown in FIG.
The holding grooves 34a, 34 of the head body 34 of the supply head 30 located at the cut-out position facing the open ends of the supply heads 1 and 22.
b. Here, each magnet M1, M2
As shown in FIG. 7, in a state where the different poles face each other and are accommodated in the holding grooves 34a and 34b, respectively.
Due to the mutual magnetic attraction, they are mutually attracted and held. At this time, the magnets M1 and M2 are positioned by the four bottom surfaces and both side surfaces of the holding grooves 34a and 34b and the end surface of the holding member 35, respectively.

From this state, the rotating unit 3 of the supply head 30
By swinging the movable member 3 with respect to the movable portion, the head body 34 is moved from the cutout portion to a lower position (see FIG. 1). When the movable portion 32 moves down with respect to the support portion 31, the head main body 34 is moved to the holding table 40.
The optical pickup is moved to a supply position facing the yoke Y of the optical pickup fixed and held thereon. Here, as shown in FIG. 8, when the head body 34 descends from above with respect to the yoke Y, each magnet M1,
M2, when approaching the upper end of the yoke Y, the magnet M
1 and M2, each magnet M1, M2
The magnetic attraction between the yoke Y and the yoke Y becomes stronger, and the lower ends of the magnets M1 and M2 are attracted to the yoke Y, respectively. Further, when the head body 34 is lowered, the magnets M1 and M2 are pushed downward by the tip of the head body 34 in a state where the entire side surface is in contact with the inner surface of the yoke Y as shown in FIG. , M2 are located at the supply positions for the yoke Y.

Then, from this state, as shown in FIG. 6, the head main body 34 is retracted with respect to the holding member 35 while the holding member 35 is stationary, as shown in FIG. With the M2 held inside the yoke Y, the head body 34 is pulled out. At this time, since the head body 34 is a non-magnetic material and the magnets M1 and M2 are held by the holding member 35, when the head body 34 is pulled out, the magnets M1 and M2 are affected and the positional shift is caused. Nothing will happen.

Thereafter, the holding member 35 of the supply head 30 is retracted. Also at this time, since the holding member 35 is a non-magnetic material, there is no possibility that the magnets M1 and M2 are affected by the retreat of the holding member 35 to cause a displacement. Then, as the movable part 32 rises with respect to the support table 31 and the rotating part 33 swings, the head main body 34 is moved to the cutout position facing the magnet cutout part 20 and returns to the original state. .

After the yoke Y held on the holding table 40 is replaced with the next new yoke,
By repeating the above-described operation, the supply of the magnets M1 and M2 to the inner surfaces of the plurality of yokes Y is sequentially performed.

As described above, in this embodiment, the magnets are supplied in two rows by the magnet input section, and a pair of magnets to be supplied to one component is cut out from the magnet input section by one magnet cutout section. The two supply heads supply the components to the opposing inner surfaces of the component. Thus, the supply of the pair of magnets to the components is performed by one magnet input unit, one magnet cutout unit, and one supply head, and the entire apparatus is configured to be small. Further, since the supply head is formed separately from the magnet cutout portion, and only one set of the magnet insertion portion, the magnet cutout portion and the supply head are provided around the supply position, the supply head is Confirmation and adjustment of the supply position are easily performed. further,
When the supply head is pulled out, since the magnet is held by the holding member, displacement of the magnet due to pulling out of the supply head is suppressed, so that the magnet is reliably supplied and held at a predetermined position on the inner surface of the component. Will be.

In the above embodiment, the magnets M1 and M2 are supplied as a pair of magnets. However, the magnets M1 and M2 may be the same magnet or different types of magnets. It is clear that there may be. Further, in the above-described embodiment, the case has been described in which the magnets are respectively supplied to the opposing inner surfaces of the yoke of the optical pickup. However, the present invention is not limited to this, and components of various devices including the magnets on the opposing inner surfaces are provided. On the other hand, it is clear that the present invention can be applied to a magnet supply device for supplying a magnet.

[0038]

As described above, according to the present invention, a magnet supply apparatus which is small in size, reduces equipment costs, and allows easy confirmation and adjustment of a magnet supply position. Can be provided.

[Brief description of the drawings]

FIG. 1 is a schematic perspective view showing the configuration of an embodiment of a magnet supply device according to the present invention.

FIG. 2 is a schematic plan view showing the structure of a magnet insertion portion of the magnet supply device of FIG. 1 when viewed from the bottom direction of FIG.

FIG. 3 is a schematic plan view showing a configuration of a magnet cutout portion in the magnet supply device of FIG.

FIG. 4 is a partially enlarged perspective view showing a state of magnet cutting in the magnet cutting section of FIG. 3;

FIG. 5 is a partially enlarged perspective view showing a state where a holding member of a main part of the supply head in the magnet supply device of FIG. 1 is retracted.

FIG. 6 is a partially enlarged perspective view showing a main member of the supply head in the magnet supply device of FIG. 1 when a holding member advances.

FIG. 7 is a partial cross-sectional view showing a magnet holding state by the supply head of FIG. 5;

FIG. 8 is a partial cross-sectional view showing a magnet supply state by the supply head of FIG. 5;

9 is a partial cross-sectional view showing a magnet supply state when the supply head of FIG. 5 approaches the yoke.

FIG. 10 is a partial cross-sectional view showing a state after magnet supply by the supply head of FIG. 5;

11 is a partial cross-sectional view showing a state in which the head main body is pulled out after the supply of the magnet by the supply head of FIG. 5;

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 ... Magnet supply apparatus, 11 ... Magnet insertion part, 12 ... Input part main body, 13, 14 ... Input groove, 15, 16 ... Push block, 15a, 16
a: guide rail, 15b, 16b: spring, 1
7 ... pushing cylinder, 20 ... magnet cutout part, 21, 22 ... cutout groove, 23, 24 ...
・ Cutout block, 23a, 24a ... spring, 23
b ... pin, 25 ... actuator, 30 ...
Supply head, 31: support base, 32: movable part, 3
3 ... rotating part, 34 ... head body, 34a, 34
b: holding groove, 35: holding member, M1, M2, etc.
-Magnet, Y ... Yoke.

Claims (4)

[Claims] 1. A magnet insertion unit for inputting magnets in a plurality of rows, a magnet cutout unit for cutting out each row of magnets input by the magnet input unit, and magnets of each row cut out by the magnet cutout unit, at predetermined intervals. And a supply head made of a non-magnetic material that moves to inner surfaces of the fixedly held components facing each other. The supply head includes a pair of holding grooves extending on both surfaces in the magnet supply direction. A magnet supply device comprising: a flat head main body; and a plurality of holding members made of a non-magnetic material provided to be able to advance and retreat in each holding groove. 2. The magnet input section includes input grooves arranged in parallel with each other for inputting the magnets of each row, and a press for pushing the magnets disposed in each input groove in the input direction. The magnet supply device according to claim 1, further comprising a block. 3. A cutout block for pushing a magnet laterally with respect to the longitudinal direction of each of the input grooves at the input side end of each input groove of the magnet input section, and a cutout block comprising: The magnet supply device according to claim 1, further comprising one driving unit for driving. 4. A magnet insertion section for inputting magnets in two rows, a magnet cutout section for cutting out each row of magnets input by the magnet input section, and a magnet of each row cut out by the magnet cutout section at a predetermined interval. And a supply head made of a non-magnetic material that moves to inner surfaces of the optical pickup yoke that are fixed and held and that are opposed to each other. A magnet supply device comprising: a flat head main body having the holding grooves described above; and a pair of holding members made of a non-magnetic material provided to be able to advance and retreat in each holding groove.