JP5186607B1 - Magnet holder, magnetic holding device using the same, and injection mold - Google Patents

Abstract

Provided is a magnet holder with a simple configuration and easy assembling work.
Magnet segments 14 to 16 divided into a plurality of portions in the circumferential direction are arranged in close contact with each other on the outer peripheral surface of a cylindrical core 13 made of a magnetic material, and the permanent magnet segments 14 to 16 are mutually attached. The cylindrical core 13 and the permanent magnet segments 14 to 16 are accommodated in the magnetic body holder 1 made of a magnetic material and arranged in the axial direction in the cylindrical core 13. A ring-shaped nonmagnetic material 5 is interposed on the outer peripheral portion of one end surface, and the magnetic adsorption surface 2 is formed by one axial end surface of the cylindrical core 13 and the magnetic material holder 1 magnetically separated by the nonmagnetic material 5. Formed.
[Selection] Figure 3

Description

  The present invention relates to a magnet holder configured using a permanent magnet, a magnetic holding device using the magnet holder, and an injection mold.

  Generally, a magnet device having various configurations in which a magnet is arranged on the outer peripheral portion of a columnar core to improve the magnetic attractive force is known (see, for example, Patent Document 1).

JP 2000-58318 A

  However, when the conventional magnet device is configured by arranging magnets on the outer periphery of the columnar core, the structure is complicated and the assembly work is troublesome. SUMMARY OF THE INVENTION An object of the present invention is to provide a magnet holder that has a simple structure and can be easily assembled, a magnetic holding device using the magnet holder, and an injection mold.

  In order to achieve the above object, according to a first aspect of the present invention, a plurality of permanent magnet segments are arranged on the outer peripheral surface of a cylindrical core made of a magnetic material so as to be magnetically attracted along the circumferential direction. Is disposed in a magnetic material holder made of a magnetic material, and a ring-shaped nonmagnetic material is interposed on the outer peripheral portion of one axial end surface of the cylindrical core, and the axial direction of the cylindrical core is The magnet holder is characterized in that a magnetic attraction surface magnetically separated by the non-magnetic material is formed by the one end surface and the magnetic material holder.

  According to such a structure, a permanent magnet can be easily assembled to the outer peripheral surface of a cylindrical core. Moreover, a high magnetic attractive force can be obtained by providing a magnetic attractive surface that is magnetically separated by interposing a ring-shaped non-magnetic material on the outer peripheral portion of the axial end surface of the cylindrical core.

  A second invention is a magnet holder according to the first invention, wherein the permanent magnet segment is formed by equally dividing a cylindrical permanent magnet in a circumferential direction of the columnar core. According to such a configuration, a permanent magnet segment having a single shape and structure may be manufactured, and it may be formed into a substantially cylindrical shape by combining the numbers according to the number of divisions, thereby facilitating manufacture and management.

  A third invention is the magnet holder according to the first or second invention, wherein two sets of cylindrical cores on which the permanent magnet segments are arranged are arranged in parallel in the magnetic material holder. It is. According to such a configuration, a small and high magnetic attractive force can be exhibited without increasing the size.

  A fourth invention is a magnetic holding device comprising any one of the first to third magnet holders and a magnet block that is attracted and separated from the magnet holder. According to such a magnetic holding device, the member including any one of the first to third magnet holders and the member including the magnet block can be reliably and easily coupled / separated.

  5th invention consists of the female | male or male metal mold | die provided with the magnet holder which is 1st thru | or 3rd invention, and the male | female or female metal mold | die provided with the magnet block attracted | sucked and separated from the said magnet holder. This is a feature of an injection mold. According to such a configuration, the female mold and the male mold can be reliably and easily coupled and separated.

  In the magnet holder according to the present invention, since a plurality of permanent magnet segments are arranged in the circumferential direction on the outer peripheral surface of the cylindrical core, the permanent magnet can be easily assembled on the outer peripheral surface of the cylindrical core. In addition, since a magnetic attracting surface magnetically divided by interposing a ring-shaped non-magnetic material is provided on the outer peripheral portion of the one axial end surface of the cylindrical core, a high magnetic attracting force can be obtained.

It is sectional drawing of the magnet holder 100 by one embodiment of this invention. It is a top view of the magnet holder 100 shown in FIG. FIG. 2 is a developed perspective view of a magnet in the magnet holder 100 shown in FIG. 1. It is sectional drawing which shows the assembly state of the magnet 9 (10) shown in FIG. It is a top view which shows the state in the middle of an assembly of the magnet 9 (10) part shown in FIG. It is sectional drawing of the magnet block 22 used by a pair with the magnet holder 100 shown in FIG. It is a top view of the magnet block 22 shown in FIG. It is a side view which shows the usage example of the magnet holder 100 shown in FIG.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1 and 2 are a sectional view and a plan view showing an embodiment of a magnet holder 100 according to the present invention. As shown in the figure, this magnet holder 100 is configured by embedding magnets 9 and 10, which will be described in detail later, in a magnetic material holder 1 made of a substantially prismatic magnetic material with chamfered corners. The magnetic adsorption surface 2 is formed by polishing the upper surface side. On both sides of the magnetic material holder 1, mounting holes 3 and 4 that are also used for magnetic flux control are formed.

  As shown in FIG. 2, the magnets 9 and 10 that are embedded in the magnetic material holder 1 are formed such that one of the magnetic pole surfaces 7 and 8 is exposed on the upper surface side of the magnetic material holder 1. For example, nonmagnetic bodies 5 and 6 formed in a ring shape with brass are arranged on the outer peripheral portion of the magnetic body. It is divided into.

  The magnets 9 and 10 disposed in the magnetic body holder 1 are firmly fixed to the magnetic body holder 1 by screws 11 and 12 screwed from the lower surface side of the magnetic body holder 1. Thereafter, the upper surface side of the magnet holder 1 is polished to include the magnetic pole surfaces 7 and 8 and the nonmagnetic materials 5 and 6 to form a flat magnetic attracting surface 2. Here, the two magnets 9 and 10 are arranged in parallel in the magnetic body holder 1 as a set, but this number may be a configuration in which one or more magnets are embedded.

  FIG. 3 is a development view showing the magnet 9 (10) described above. As shown in the figure, this magnet 9 (10) has a cylindrical core 13 made of a magnetic material and a cylindrical permanent magnet made of samarium cobalt or the like divided into a plurality (three in this embodiment) on its outer periphery. Permanent magnet segments 14 to 16, a nonmagnetic body 5 formed of brass in a ring shape, and a nonmagnetic body 17 of a cap shape made of aluminum or the like.

  The cylindrical core 13 is threadedly engaged with the screw 11 shown in FIG. 1 on the end face of the other end in the axial direction on the other end in the axial direction without the flange 18 and the large flange 18 integrally formed at one end in the axial direction. And a screw hole 19 formed in the above. The non-magnetic body 5 formed in a ring shape has a minimum diameter portion in which the main portion of the cylindrical core 13 can be inserted but the flange 18 cannot be inserted, and an inner side thereof when inserted to the axial end near the flange 18. And a recess 20 that can accommodate the bag 18 exactly.

  The insertion depth is determined so that the lower surface of the flange 18 and the lower surface of the non-magnetic body 5 located on the same side are substantially flush with each other when the flange 18 is stored in the recess 20. After that, both are polished to form a flat (smooth) magnetic attraction surface 2.

  The permanent magnet segments 14 to 16 are divided into three in the circumferential direction so as to surround the outer circumferential surface of the cylindrical core 13 in the circumferential direction, and the inner circumference has a shape that is in close magnetic contact with the outer circumferential surface of the cylindrical core 13. If it is arranged side by side in the circumferential direction so as to surround the outer peripheral surface of the cylindrical core 13, it becomes a substantially cylindrical permanent magnet as a whole.

  The non-magnetic body 17 has a recess on the lower side where the other end of the cylindrical core 13 not having the flange 18 can be inserted by a predetermined length, and the screw 11 shown in FIG. It has a possible hole 21.

  As for the assembly as the magnet 9, first, the cylindrical core 13 is inserted into the ring-shaped nonmagnetic body 5 as shown by the dotted line in the figure from the other end side without the flange 18, and the nonmagnetic body 5 is circularly inserted. After moving to the end of the columnar core 13 on the side where the flange 18 is provided, the flange 18 is housed in the recess 23 of the nonmagnetic material 5. Thereafter, the permanent magnet segments 14 to 16 that are divided into three in the circumferential direction are arranged along the opposite end of the non-magnetic body 5 so as to surround the outer peripheral surface of the cylindrical core 13.

  FIG. 5 is a plan view of the state in which the permanent magnet segments 14 to 16 are disposed along the outer peripheral surface of the cylindrical core 13 as viewed from the other end side of the cylindrical core 13 without the flange 18. As can be seen from the figure, the permanent magnet segments 14 to 16 are magnetically coupled to the outer peripheral surface of the cylindrical core 13 made of a magnetic material, and are also magnetically coupled to each other in the circumferential direction. It has a cylindrical shape. It is also conceivable that the permanent magnet segments 14 to 16 are formed in an integral cylindrical shape without being divided in the circumferential direction. However, when divided in the circumferential direction as shown in the drawing, the permanent magnet segments 14 to 16 can be arranged from each convenient direction of the cylindrical core 13, so that the assembling work is facilitated.

  The circumferential widths of the magnet segments 14 to 16 may be different from each other. In particular, if the permanent magnet segments 14 to 16 are equally divided in the circumferential direction and manufactured, the permanent magnet segments of one type and shape are used. Can be manufactured and combined in a number corresponding to the number of divisions to form a substantially cylindrical shape, facilitating production and management.

  After that, as shown in FIG. 3, the non-magnetic body 17 is disposed on the other end side of the cylindrical core 13 that does not have the flange 18, and the other end of the cylindrical core 13 is placed in the recess formed inside the non-magnetic body 17. Is inserted. Since the magnet 10 has the same configuration, a detailed description thereof is omitted here.

  The magnet holder 100 shown in FIG. 1 has the magnetic attracting surface 2 disposed above. In order to match this arrangement, the entire magnet 9 is rotated 180 degrees and turned upside down so that the flange 18 of the cylindrical core 13 is positioned upward as shown in FIG. At this time, since the flange 18 is housed in the recess 20 of the nonmagnetic body 5, the upper surface of the flange 18 and the upper surface of the nonmagnetic body 5 coincide with each other.

  In the axial direction of the cylindrical core 13, three divided permanent magnet segments 14 to 16 are arranged on the outer peripheral surface of the cylindrical core 13 between the nonmagnetic body 5 and the nonmagnetic body 17. Further, the screw hole 19 formed in the cylindrical core 13 and the hole 21 formed in the non-magnetic body 17 coincide with each other.

  Thereafter, as shown in FIG. 1, the magnets 9 and 10 in an assembled state are housed in the magnetic material holder 1, and the screws 21 and 12 are screwed in from the lower surface side of the magnetic material holder 1, while the holes 21 shown in FIG. And screwed into the screw hole 19 of the cylindrical core 13. As a result, the nonmagnetic material 5 can be firmly held via the flange 18, and the entire magnets 9 and 10 can be firmly held in the magnetic material holder 1. Thereafter, the outer periphery of the non-magnetic members 5 and 6 formed in a ring shape and the magnetic material holder 1 are brought into close contact with each other to form a flat magnetic attracting surface 2.

  Here, the magnetic attraction force obtained by magnetically attracting a weight to the magnetic attraction surface 2 and measuring the weight when the two are separated will be described. The attracting force of the magnet segment 14 alone shown in FIG. 3 was about 851.53 g, and the attracting force as the magnet 9 shown in FIG. 5 was 2.1053 kg. The attractive force as the magnet 9 is substantially equal to the total attractive force of the permanent magnet segments 14 to 16 divided into three. However, the attracting force in the finished product as the magnet holder 1 shown in FIG. 1 is 41.3 Kg, and a very large attracting force is obtained while using a configuration in which the magnet segments 14 to 16 are cylindrical. I was able to.

  6 and 7 are a sectional view and a plan view of the magnet block 22 used as a pair with the magnet holder 100 described above. The magnet block 22 is made of a magnetic material, has a substantially prismatic shape with chamfered corners, and the upper surface side of FIG. The magnetic attracting surface 23 is polished and flattened in the same manner as the magnetic attracting surface 2 shown in FIG. On both sides of the magnet block 22, mounting holes 24 and 25 that are also used for magnetic flux control are formed.

  FIG. 8 is a side view of a plastic injection mold using a magnetic holding device composed of the magnet holder 100 and the magnet block 22 described above. The injection mold is composed of a pair of molds of a female mold 27 and a male mold 28. Then, the magnet holder 100 constituting one of the magnetic holding devices is attached to the edge of one mold (for example, the female mold 27), and the edge of the other mold (for example, the male mold 28) is attached. 6 and FIG. 7, the magnet block 22 constituting the other side of the magnetic holding device is attached and used.

  That is, the female holder 27 is provided with the magnet holder 100 having the magnetic attraction surface 2 disposed so as to be parallel to the press surface and facing the male die 28 by using the mounting holes 3 and 4. It is attached with bolts. A magnet block 22 having a magnetic attracting surface 23 disposed so as to face the magnetic attracting surface 2 of the female die 27 is attached to the male die 28 with bolts or the like using attachment holes 24 and 25.

  When the female die 27 and the male die 28 are closed, the magnetic adsorption surface 2 of the magnet holder 100 and the magnetic adsorption surface 23 of the magnet block 22 are in contact with each other, and magnetic coupling between the magnet holder 100 and the magnet block 22 is performed. The closed state is maintained. According to such a magnetic holding device, it becomes a compact structure compared with the case where other mechanical holding devices are used, and attachment and removal becomes very easy.

  As described above, the magnet holder 100 of the present invention can obtain a strong magnetic attractive force with a relatively simple configuration, and is configured in an integral cylindrical shape without dividing the permanent magnet segments 14 to 16 in the circumferential direction. Compared to the case, the permanent magnet segments 14 to 16 having a simple configuration may be manufactured, and the permanent magnet segments 14 to 16 may be combined into a substantially cylindrical shape by combining the numbers according to the number of divisions. In addition, the plurality of permanent magnet segments can be easily arranged from the outer peripheral portion of the cylindrical core 13, and the assembling work is also facilitated.

  In addition, a permanent magnet segment having a single shape and structure is produced by forming the permanent magnet segments 14 to 16 into a plurality of circumferentially divided equal parts on the outer peripheral surface of the cylindrical core 13 made of a magnetic material, What is necessary is just to make it substantially cylindrical shape combining the number according to the division | segmentation number, and manufacture and management become easy.

  The magnet holder 100 and the magnetic holding device using the same according to the present invention can be applied not only to the configuration shown in FIG. 1 but also to other configurations. The form using this magnetic holding device is shown in FIG. The present invention can be used as it is for other molds as well as plastic injection molds as shown in FIG.

DESCRIPTION OF SYMBOLS 100 ... Magnet holder 1 ... Magnetic body holder 2 ... Magnetic adsorption surface 5, 6 ... Non-magnetic body 7, 8 ... Magnetic pole surface 9, 10 ... Magnet 13 ... Cylindrical core 14-16 ... Permanent magnet segment 17 ... Non-magnetic body 18 … 鍔 27,28… Mold

Claims (5)

A plurality of permanent magnet segments are magnetically adsorbed along the circumferential direction of a cylindrical core made of a magnetic material, and the cylindrical core having the permanent magnet segments is made of a magnetic material. A ring-shaped nonmagnetic material is interposed in an outer peripheral portion of one axial end surface of the cylindrical core, and the nonmagnetic material is formed by the axial one end surface of the cylindrical core and the magnetic material holder. To form magnetically attracted surfaces that are magnetically separated by
The cylindrical core has a flange having a diameter larger than that at the end portion on the magnetic adsorption surface side,
The ring-shaped non-magnetic body has a minimum diameter portion into which the flange cannot be inserted when inserted from the other end of the cylindrical core that does not have the flange, and a concave portion that stores the flange.
The permanent magnet segment is disposed so as to be in contact with the lower surface side of the smallest diameter portion of the non-magnetic body in a state where the non-magnetic body is disposed so as to store the ridge in the concave portion,
On the other hand, a cap-like nonmagnetic material having a recess into which the other end can be inserted is disposed at the other end of the cylindrical core.
The cap-shaped nonmagnetic body is formed with a hole that matches the screw hole formed on the other end side in a state in which the other end of the cylindrical core is inserted into the recess of the nonmagnetic body. Magnet holder. The magnet holder according to claim 1,
The permanent magnet segment is formed by equally dividing a cylindrical permanent magnet in the circumferential direction of the columnar core. In the magnet holder according to claim 1 or 2,
A magnet holder comprising a pair of cylindrical cores each having the permanent magnet segments arranged in parallel in the magnetic body holder.   A magnetic holding device comprising the magnet holder according to claim 1 and a magnet block that is attracted and separated from the magnet holder.   An injection comprising: a female or male mold comprising the magnet holder according to any one of claims 1 to 3; and a male or female mold comprising a magnet block that attracts and separates from the magnet holder. Mold for molding.

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