JP3121551B2 - How to pack magnet-based products - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a packing method for storing or transporting a product utilizing a magnet having an open magnetic path structure. More specifically, the present invention uses a packing material having elasticity and a magnetic plate, clamps a product utilizing a magnet using the elasticity of the packing material, and magnetically attracts the product using the magnetic force of the magnet. Therefore, the present invention relates to a method of packing a product utilizing a magnet devised so that it can be stably held. This technique is suitable for storing and transporting small and expensive electronic components such as a substrate type drop-in circulator or isolator used in a millimeter wave band.

[0002]

2. Description of the Related Art Hereinafter, a substrate type drop-in circulator / isolator used in a millimeter wave band will be described as an example of a product utilizing a magnet having an open magnetic circuit structure. This circulator has a structure as shown in FIG. 8, for example, where A is an exploded perspective view and B is a perspective view of a product. The circulator 10 is provided with a large-diameter cylindrical magnet (diameter 1.6 mm, height 3 mm) 12 on the back side of a square ferrite substrate (4 mm in length and width, 0.2 mm in thickness) 11, and a circle on the front side. Plate-shaped support (diameter 0.8mm, thickness 0.2mm)
13, a small-diameter cylindrical magnet (0.8 mm in diameter,
14 (height: 1.5 mm), which are connected and integrated by an adhesive on all joint surfaces. On the surface of the ferrite substrate 11, a conductor pattern 15 having a shape in which three branch lines continue symmetrically from a circular junction is formed by a printed wiring technique, and the support base 13 is located just above the junction. Adhered to. As is well known, by applying a DC magnetic field to the ferrite substrate 11 by both the magnets 12 and 14, it operates as a circulator whose input and output are cyclically determined between the terminals. When a dummy resistor is connected to one terminal of the three-terminal circulator to make it a non-reflection terminal, it becomes an isolator. In such a structure, an accommodation hole is provided in the mounting board of the device, a large-diameter cylindrical magnet is dropped into the accommodation hole, and the ferrite substrate is used so as to be connected to the wiring pattern of the mounting board at the branch line portion. For this reason, it is called a “substrate-type drop-in” structure.

The above is a typical example of a circulator, and various structures have been developed and used in practice. For example, there is a configuration in which the magnet is provided on only one side of the ferrite substrate, not on both sides. Instead of a ferrite substrate,
In some cases, a configuration in which ferrite disks are stacked on a dielectric circuit board, or a configuration in which a ferrite disk is embedded in a dielectric circuit board is used. In any case, a magnet is indispensable, and is used in an open magnetic circuit configuration to apply a magnetic field to the ferrite.

In such a circulator, small parts are bonded by an adhesive layer, a thin ceramic substrate is projected, a small-diameter magnet is projected, and a strong magnetic field is generated around the circulator. If they are simply placed on the packing material, they will collide with each other due to the magnetic attraction force, so that they are relatively easily damaged and difficult to handle. Moreover, the entire circulator is relatively small and expensive. Great care must be taken during storage and transport for them. 9 and 10 show examples of a conventional packing method.

In the example shown in FIG. 9, as shown in A, a sponge plate 20 which is considerably thicker than the vertical or horizontal dimension of the ferrite substrate 11 of the circulator 10 is prepared, and a large number of sponge plates 20 are provided (however, for the sake of simplicity here). (Only one is drawn in FIG. 1). The length and depth of the cut 21 are set larger than the vertical and horizontal dimensions of the ferrite substrate 11. Then, the notch 21 is greatly expanded using tweezers or the like (the virtual line 21 in FIG.
a), the ferrite substrate 11 is sandwiched between tweezers (not shown) so that the circulator 10 is placed horizontally, and inserted into the notch 21a that has been expanded, and the elasticity of the sponge plate 20 is used to form the circulator 10. This is a method of holding the magnets 12 and 14 by applying an axial clamping force between the magnets 12 and 14. The cross section after packing is shown in FIG.

In the example shown in FIG. 10, a urethane foam plate 25 thicker than the height of the cylindrical magnet 12 below the circulator 10 is prepared as shown in FIG. Only one through-hole 26 is formed in order to form the through hole 26). Here, each through hole 26 has such a size that the lower cylindrical magnet 12 is loosely fitted. The cylindrical magnet 12 below the circulator 10 is inserted into the through hole 26 of the urethane foam plate 25, and the lower surface of the horizontally extending ferrite substrate 11 is supported against the upper surface of the urethane foam plate 25, and the sponge plate 27 is placed on them. This is a structure to hold by pressing and holding. The cross section after packing is shown in FIG.

[0007]

In the case of the packing method shown in FIG. 9, the circulator 10 cannot be packed or cannot be taken out unless the cuts 21 of the sponge plate 20 are opened and expanded, resulting in poor workability. Furthermore, if the degree of expansion of the notch 21a is small at the time of packing or taking out, the end faces of the magnets 12 and 14 may be
May be caught on the cut side surface and may be damaged by mechanical stress. Also, due to imbalanced holding during storage, or vibration during transportation (indicated by an arrow a), a large moment acts between the tips of the two magnets 12 and 14 to apply mechanical stress and deteriorate the characteristics. In extreme cases, there is a possibility that the adhesive layer may be damaged at the adhesive layer.

In the case of the packing method shown in FIG. 10, if there is no covering sponge plate 27, there is a danger that it will pop out due to vibration during transportation. Misalignment of the sponge plate 27 at the time of packing or removal, and during transportation (indicated by an arrow b)
In this case, mechanical stress is applied, and the characteristics may be degraded. Further, while packing or taking out, the work is performed with the sponge plate 27 being removed, and at that time, each circulator 10 simply operates the lower columnar magnet 12 by the urethane foam plate 2.
Since the circulators are merely loosely fitted and placed in the through holes 26 of the fifth circulator, when another circulator approaches, a magnetic attraction force acts and the circulators may collide with each other and be damaged.

An object of the present invention is to facilitate packing and unloading operations, in which mechanical stress is unlikely to be applied to the product, and a large moment is applied to the product even if vibrations are applied during storage or transportation. There is no danger of damage due to no action, and each product can be held individually during packing and unpacking. It is to provide a packing method.

[0010]

SUMMARY OF THE INVENTION The present invention is a method for packing a product utilizing a magnet having an open magnetic path structure. In the present invention, a plate-shaped packing material made of an elastic material and a magnetic plate provided on the lower surface side of the packing material are used. The packing material has a storage hole into which a magnet part of a magnet-using product to be packed can be inserted. The magnet inserted into the storage hole is elastically held on a side surface, and the magnetic plate is moved by the magnetic force of the magnet. Is a packing method in which magnet-using products are held by sucking at intervals.

The magnet part of the magnet-using product to be packed is held by the elasticity of the packing material. This pinching force acts laterally. On the other hand, the force for attracting the magnetic plate by the magnetic force of the magnet acts in the vertical direction. With both these forces,
The product using the magnet is surely held by the packing material. There is no danger of being ejected even if vibrations are applied during transportation, and there is no mechanical stress due to misalignment or vibration. There is no danger of collisions.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION A packing material is, for example, a combination of a plate-like upper packing material and a lower packing material, and the lower packing material has a large number of storage holes into which a magnet portion of a magnet-using product to be packed can be inserted. Then, it is clamped by its elasticity, and is attracted to the magnetic plate at intervals by the magnetic force of the magnet, thereby holding the magnet-using product. The upper packing material has an opening area at a position corresponding to each of the storage holes of the lower packing material, the opening area in which the remaining portion of the magnet-based product is loosely fitted, and the through-hole having a height at which the remaining portion of the magnet-based product is completely buried. It is preferable to pack the magnet-using product so that the surroundings are surrounded by a packing material. Here, the lower packing material and the upper packing material may be separate members, or may be integrated packing materials.

As the resilient packing material, various plastic foams (foamed plastics) may be used, and for example, urethane foam is preferably used. The magnetic plate may be a thin iron plate. By arranging the cushioning material without holes on both outer sides where the packing material and the magnetic plate are combined, it is possible to pack more safely.

The magnet-based product having an open magnetic circuit structure to be packed in the present invention is typically a substrate type drop-in circulator or isolator used in a millimeter wave band as shown in FIG. Of course, the present invention can be applied to packaging of a circulator other than the structure shown in FIG. Others
It can also be applied to the packing of a rotor incorporating a magnet used in a small motor or the like, or a magnet alone.

[0015]

FIG. 1 is an explanatory view showing one embodiment of the method of the present invention, and FIG. 2 is an exploded perspective view showing details of the packing material. Here, the product to be packed is a substrate type drop-in circulator / isolator as shown in FIG. The packing material is a combination of a plate-shaped upper packing material 30, a lower packing material 32, and an iron plate 34 provided on the lower surface of the lower packing material 32, both of which are made of an elastic material such as urethane foam. These may be adhered to each other or may simply be stacked. The lower packing material 32 has a large number (six in FIG. 2) of circular through holes 36 into which the large-diameter lower magnet 12 of the circulator 10 to be packed can be fitted. The length of the circular through hole 36 (in other words, the thickness of the lower packing material 32) is
The diameter D ₁ of the circular through-hole 36 is slightly smaller than the diameter D ₂ of the lower magnet 12.

From the state shown in FIG.
When the pin 12 is pinched and dropped into the circular through-hole 36, the magnet 12 slides into the circular through-hole 36 due to the magnetic attraction between the magnet 12 and the iron plate 34, and the lower surface of the ferrite substrate 11 which protrudes in the horizontal direction becomes lower. It is supported against the upper surface of the packing material 32. In this state, the magnet 12 is mainly held from the outer peripheral side by the horizontal elastic force of the lower packing material 32 and is auxiliaryly attracted by the vertical magnetic attraction force (see FIG. 1B). . It was the diameter D ₁ of the circular through hole 36 is smaller than the outer diameter D ₂ of the magnet 12, as well as produce a clamping force in the horizontal direction after insertion, when released the circulator 10 when dropped, the rapid fall This is to prevent the ferrite substrate 11 from being shocked. If the diameter of the circular through-hole is larger than the outer diameter of the magnet, the circulator may fall due to strong magnetic attraction, and the ferrite substrate may collide with the lower packing material and break. Length of circular through hole 36 (thickness of lower packing material)
Is made longer than the length of the magnet 12 in order to prevent the magnet 12 from colliding with the iron plate 34 when dropping the circulator 10 to prevent chipping due to the collision.

The upper packing material 30 functions to protect the upper structure of the circulator 10. The upper packing material 30 is provided with a through hole 38 having an opening area capable of accommodating the ferrite substrate 11 at a position corresponding to the circular through hole 36 of the lower packing material 32. It is not always necessary to have a circular shape. For example, in the case of a circular shape, the hole diameter of the through hole 38 is set slightly larger than the diagonal size of the ferrite substrate 11. The thickness of the upper packing material 30 is larger than the length from the upper surface of the upper magnet 14 of the circulator 10 to the lower surface of the ferrite substrate 11. As a result, the circulator 10 is completely buried, and the circulator is protected even if any foreign matter is dropped or placed on the upper packing material by mistake during the operation. When the upper packing material 30 is simply stacked on the lower packing material 32, the work can be performed with the upper packing material removed at the time of packing or removal. In consideration of protection of the circulator, it is desirable to work with the upper packing material placed.

If the circulator is housed in a plastic case (not shown) or the like in this state, the circulator can be safely transported without being damaged. In consideration of housing in a plastic case or the like, it is not always necessary to use the upper packing material in the above embodiment. This is because if the upper part can be covered with a plastic case so as to reliably provide a desired space, the internal circulator can be protected without using an upper packing material.

FIG. 3 shows another embodiment of the present invention. Since the basic packing state is the same as that shown in FIG. 1B, corresponding parts are denoted by the same reference numerals and description thereof will be omitted. Here, cushion material 4 is provided on both the lower surface of iron plate 34 and the upper surface of upper packing material 30.
0 and 42 are arranged. The cushion members 40 and 42 may be relatively thin plate-shaped ones without holes (sponge plate), and their thickness is arbitrary. Thereby, the circulator 1
0 indicates that the periphery is completely surrounded by a packing material or the like. It is more preferable that the circulator is accommodated in a plastic case or the like in this state, since the impact on the iron plate or the like is reduced and the upper part of the circulator is completely protected. In such a packed state, it is also possible to package with a heat-shrinkable film or the like without using a plastic case.

FIG. 4 shows still another example of the present invention.
Here, the packing material has an integral structure. That is, the lower packing material and the upper packing material in FIG. 2 are integrated.
The circular through-hole 52 formed in the packing material 50 made of urethane foam or the like has a large diameter at the upper part and a small diameter at the lower part.
The hole diameter and the hole length of the upper packing material and the hole diameter and the hole length of the lower packing material are set to be the same as those of the embodiment. The iron plate 34 is provided along the lower surface of the packing material 50. The packing state of the circulator is substantially the same as that shown in FIG.

The product to be packed in the present invention is not limited to a substrate type drop-in circulator as shown in FIG. It can also be applied to the packing of a rotor incorporating a magnet used in a small motor or the like, or a magnet alone. The example is shown in FIGS.

FIG. 5 shows an example in which the rotor 60 is packed vertically. The rotor 60 has a structure in which a rotation shaft 61 is located at the center, a cylindrical magnet 62 is arranged on the outer periphery, and the both are fixed by a metal material or a resin material. The packing material 64 is provided with a storage hole 65 having a hole diameter slightly smaller than the outer diameter of the magnet 62 and an escape hole 66 for one rotary shaft provided at the bottom of the hole. An iron plate 68 is arranged on the lower surface of the packing material 64. The iron plate 68 is provided with a relief hole 69 for the rotating shaft 61 as necessary, similarly to the relief hole 66. When the rotor 60 is fitted into the storage hole 65, the lower end surface of the magnet 62 is supported by the bottom surface of the storage hole 65, and
Is held by the elastic force of the packing material 64 from the periphery. Also, the magnetic force of the magnet 62 attracts the iron plate 68, and the iron is attracted in the vertical direction. In this way, the rotor 60 is
4 will be held. It is preferable that the thickness of the packing material 64 be set to a size such that the rotating shaft 61 does not protrude.

FIG. 6 shows an example in which the rotor 60 is packed horizontally. The storage hole 72 formed in the packing material 70 has a vertical dimension longer than the entire length of the rotating shaft 61 (see FIG. 6A) and a horizontal dimension slightly smaller than the outer diameter of the magnet 62 (see FIG. 6B). I do. The storage hole 72 has a non-penetrating structure so that a thin bottom portion remains. When the rotor 60 is inserted into the storage hole 72, the lower side of the peripheral surface of the magnet 62 is supported by the bottom surface of the storage hole 72, and the magnet 62 is clamped by the elastic force of the packing material 70 on the peripheral surface. Also magnet 6
It is attracted to the iron plate 74 by the magnetic force of 2 and is attracted in the vertical direction. Thus, the rotor 60 is held in the packing material 70.

FIG. 7 shows an example in which the magnet 80 is packed. The storage hole 84 formed in the packing material 82 is set such that one or both of the vertical dimension and the horizontal dimension is slightly smaller than the dimension of the magnet 80. This storage hole 8
4 has a non-penetrating structure so that a thin bottom portion remains. When the magnet 80 is fitted into the storage hole 84, the magnet 84
Is supported by the bottom surface of the storage hole 84, and the magnet 80 is held by the elastic force of the packing material 82 on the side surface. Also, the magnetic force of the magnet 80 attracts the iron plate 86,
Suction is performed in the vertical direction. In this way, the magnet 80 is held in the packing material 82.

[0025]

As described above, according to the present invention, a storage hole is formed in a packing material in which a magnet portion of a product using a magnet can be fitted, and the magnet fitted in the storage hole is clamped by the elasticity of the packing material. This is a packing method that holds the magnet-using product by attracting the magnetic plate with the magnetic force of the product.Therefore, it is difficult for mechanical stress to be applied to the product during packing and taking out work, and vibration during storage and transport etc. Even if is added, a large moment does not act on the product, so there is no risk of breakage. Moreover, since each product can always be held individually during packing or taking out, there is no collision even if magnetic attraction between the products acts. Therefore, the magnet-using product can be stored and transported without being damaged, and packing and taking out work can be easily performed.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing one embodiment of the present invention.

FIG. 2 is an exploded perspective view showing an example of a packing material used in the present invention.

FIG. 3 is a sectional view showing another embodiment of the present invention.

FIG. 4 is a partially broken exploded perspective view showing another example of the packing material used in the present invention.

FIG. 5 is a sectional view showing another example of the present invention.

FIG. 6 is a sectional view showing another example of the present invention.

FIG. 7 is a sectional view showing another example of the present invention.

FIG. 8 is an explanatory view showing an example of a substrate type drop-in circulator.

FIG. 9 is an explanatory view showing an example of a conventional packing method.

FIG. 10 is an explanatory view showing another example of a conventional packing method.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Circulator 11 Ferrite board 12, 14 Magnet 30 Upper packing material 32 Lower packing material 34 Iron plate 36 Circular through hole 38 Through hole

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int. Cl. ⁷ , DB name) B65B 25/00 B65D 5/50 101 B65D 85/38

Claims (5)

(57) [Claims] 1. A method for packing a product utilizing a magnet having an open magnetic path structure, wherein the product utilizing a magnet is provided on a back side of a ferrite substrate.
A lower magnet is provided, and an upper structure is provided on the front side.
Board-type drop-in circulator or eye
It is a solator, using a plate-shaped packing material made of a resilient material and a magnetic plate provided on the lower surface side of the packing material, wherein the packing material can be fitted with a lower magnet of a magnet-using product to be packed. Do accommodating hole be formed, a magnet that is fitted in the accommodation hole while sandwiching the elastic on the side, said Ma <br/> Gunetto available product by sucking at intervals the magnetic plate by the magnetic force of the magnet A method of packing a product utilizing magnets, wherein 2. A method of packing a product utilizing a magnet having an open magnetic path structure, wherein the product utilizing a magnet is provided on a back side of a ferrite substrate.
A lower magnet is provided, and an upper structure is provided on the front side.
Board-type drop-in circulator or eye
An isolator, a plate-shaped upper packing material and the lower packing material made of a resilient material, and a magnetic plate provided on the lower surface of the lower packaging material, wherein the lower packaging, the lower part of the magnet-based products to be packaged
Magnet be formed a plurality of housing holes fittable, thereby clamping the resilient a magnet which is fitted into the receiving hole in the side, the magnet utilized by sucking at intervals the magnetic plate by the magnetic force of the magnet product is held in the upper portion packing material, at positions corresponding to the housing hole of the lower packaging material, the lower portion of the magnet-based products the magnet
Through holes of height have been formed the remainder except the bets are buried in且one full has an open area loosely fitted, characterized in that to surround the periphery of the magnet utilized products in packaging materials How to pack products that use magnets. 3. The method of packing a magnet-based product according to claim 2, wherein a packing material in which the lower packing material and the upper packing material are integrated is used. 4. The method according to claim 1, wherein the packing material is made of urethane foam, and the magnetic plate is made of an iron plate. 5. The method of packing a magnet-based product according to claim 1, wherein cushioning materials without holes are arranged on both outer sides of the combined packing material and magnetic plate.