JP2007020377A - Method for manufacturing shaft type linear motor and device therefor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To accommodate repulsive magnets simply and easily with a simple structure. <P>SOLUTION: In the method for manufacturing a shaft type linear motor, a plurality of adjacent magnets 5 are accommodated in a pipe-shaped member 4, so as to repel with each other to assemble a stator. The linear motor has a fixing table 3 for fixing the pipe-shaped member 4 and a shaft-shaped member 20 moving in parallel with the longitudinal direction of the pipe-shaped member 4. The magnets 5 are moved in parallel with the longitudinal direction of the pipe-shaped member 4 by the shaft-shaped member 20 to accommodate the magnets 5 into the pipe-shaped member 4. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a method for manufacturing a shaft-type linear motor and a manufacturing apparatus for a shaft-type linear motor, particularly configured by combining a plurality of magnets.

  Recently, for example, in the field of office automation equipment, it has been proposed to use a shaft-type linear motor in a portion that requires linear movement, such as a print head. Normally, a shaft-type linear motor is arranged in such a manner that a plurality of magnets are combined in series so that opposite magnetic poles face each other, and the stator is disposed outside the stator so as to surround the stator, and in the axial direction of the stator. And a mover including a slidable coil. By passing a current through the coil so as to cross the magnetic flux generated by the magnet, a driving force is generated in the coil in the axial direction based on the interaction between the current and the magnetic field, and as a result, the mover moves. .

In such a shaft type linear motor, until now, a cylindrical magnet was used to fix the repulsive magnets in close contact, a shaft was passed through the center, and a screw portion was provided at the end of the shaft. Was used to fix the magnet so as to be sandwiched (Japanese Patent Laid-Open No. 10-313566).
Japanese Patent Laid-Open No. 10-313566

  In the case of using such a cylindrical magnet, the force of the repelling magnet is suppressed by adopting the configuration as described above, but the number of parts is high, such as requiring an axis at the center, and the cost is high. It was.

  Further, the magnet is limited to a magnet having a hole in the center of the magnet, and when a cylindrical magnet is used, the magnet cannot be stored safely and easily.

  The present invention has been made in view of such a situation, and a shaft type linear motor manufacturing method and a shaft type linear motor manufacturing apparatus capable of easily and easily storing repulsive magnets with a simple configuration. provide.

In order to solve the above problems, the present invention is configured as follows.

  The invention according to claim 1 is a method of manufacturing a shaft-type linear motor in which a plurality of adjacent magnets are housed in a pipe-shaped member so as to repel each other and a stator is assembled, and a fixing base for fixing the pipe-shaped member And a shaft-shaped member that moves parallel to the longitudinal direction of the pipe-shaped member, and the shaft-shaped member causes the magnet to translate in the longitudinal direction of the pipe-shaped member, and the magnet is moved to the pipe-shaped member. It is a manufacturing method of the shaft type linear motor characterized by storing in a housing.

  In the invention according to claim 2, the magnet is translated between the opening of the pipe-shaped member and the shaft-shaped member in the longitudinal direction of the pipe-shaped member, and the magnet is moved to the opening of the pipe-shaped member. The shaft type linear motor manufacturing method according to claim 1, wherein feeding is performed.

  The invention described in claim 3 is characterized in that the magnets fed between the opening of the pipe-shaped member and the shaft-shaped member are aligned so that the magnetic poles attract each other in the lateral direction. A shaft type linear motor manufacturing method according to claim 1 or claim 2.

  In a fourth aspect of the invention, after a predetermined number of the magnets are fed, a sealing member having an outer dimension equivalent to that of the magnets is fed in the same manner as the magnet, and the magnets are fed to the pipe-shaped member. The shaft type linear motor manufacturing method according to any one of claims 1 to 3, wherein sealing is performed.

  The invention according to claim 5 is a shaft-type linear motor manufacturing apparatus in which a plurality of adjacent magnets are housed in a pipe-shaped member so as to repel each other and a stator is assembled thereto. A shaft-like member that moves parallel to the longitudinal direction of the pipe-like member, and the shaft-like member translates the magnet in the longitudinal direction of the pipe-like member, and the magnet is accommodated in the pipe-like member. A shaft type linear motor manufacturing apparatus comprising: a feeding mechanism.

  In the invention according to claim 6, the feeding mechanism translates the magnet in the longitudinal direction of the pipe-shaped member between the opening of the pipe-shaped member and the shaft-shaped member, and the magnet is 6. The shaft type linear motor manufacturing apparatus according to claim 5, wherein the apparatus is fed into an opening of the member.

  The invention described in claim 7 is characterized in that the magnets fed between the opening of the pipe-shaped member and the shaft-shaped member are aligned so that the magnetic poles attract each other in the lateral direction. 5. A shaft type linear motor manufacturing apparatus according to claim 5 or claim 6.

  In the invention according to claim 8, after a predetermined number of the magnets are fed, a sealing member having an outer dimension equivalent to that of the magnets is fed in the same manner as the magnet, and the magnets are fed to the pipe-shaped member. 8. The shaft type linear motor manufacturing apparatus according to claim 5, wherein sealing is performed.

  With the above configuration, the present invention has the following effects.

  According to the invention of claim 1 and claim 5, by reciprocally moving the magnet in the longitudinal direction of the pipe-like member by the shaft-like member and storing the magnet in the pipe-like member, the repulsion is achieved with a simple configuration. The magnet can be stored in the pipe-shaped member simply and easily by pressing the force of the matching magnet.

  According to the invention of claim 2 and claim 6, the magnet is translated between the opening of the pipe-like member and the shaft-like member in the longitudinal direction of the pipe-like member. The magnet is fed into the opening of the pipe-shaped member, and the magnet can be easily and easily accommodated in the pipe-shaped member with a simple configuration.

  According to the invention of claim 3 and claim 7, since the magnets fed between the opening of the pipe-like member and the shaft-like member are aligned so that the magnetic poles attract each other in the lateral direction, It is easy to store in the pipe-shaped member so as to repel each other by being pushed in sequentially by the shaft-shaped member.

  According to the inventions of claim 4 and claim 8, after a predetermined number of magnets are fed, a sealing member having an outer dimension equivalent to the magnet is fed in the same manner as the magnet, and the magnet is a pipe-shaped member. Since the same mechanism as the mechanism for sealing the magnet and storing the magnet in the pipe-shaped member is used, a simple configuration can be achieved.

  Hereinafter, embodiments of a method for manufacturing a shaft-type linear motor and an apparatus for manufacturing a shaft-type linear motor according to the present invention will be described. The embodiment of the present invention shows the most preferable embodiment of the present invention. Is not limited to this.

  1 is a schematic configuration diagram of a shaft type linear motor manufacturing apparatus, FIG. 2 is an enlarged view of a fixed base, FIG. 3 is a sectional view taken along line III-III in FIG. 2, and FIG. 4 is a rear end of the shaft type linear motor. FIG. 5 is a front view of the fixing portion of the sealing member at the rear end portion of the shaft type linear motor.

  In the shaft-type linear motor manufacturing apparatus 1 of this embodiment, a pair of fixing bases 3a and 3b are provided in the apparatus main body 2. On the fixing bases 3a and 3b, the pipe-like member 4 is placed so that the longitudinal direction of the pipe-like member 4 is horizontal, and the pipe-like member 4 is fixed to the fixing bases 3a and 3b by holding members 3a1 and 3b1. Is held in. The holding members 3a1, 3b1 are attached to the fixing bases 3a, 3b by bolts 3a2, 3b2, and the holding members 3a1, 3b1 hold the pipe-like member 4 so that the pipe-like member 4 is not blown by the repulsive force of the magnet 5. It has become.

  1 and 2, the fixing base 3a located on the left side has an abutting surface 3a3, and the tip portion 4b of the pipe-like member 4 is abutted against the abutting surface 3a3. A sealing member 60 having a female screw 60a is provided at the distal end portion 4b of the pipe-shaped member 4, and the sealing member 60 has an outer dimension equivalent to that of the magnet 5 and prevents the magnet 5 from coming off. The abutment surface 3a3 of the fixed base 3a restricts the pipe-like member 4 from being pushed out by the repulsive force of the magnet 5 when the magnet 5 is packed into the pipe-like member 4. The pipe-shaped member 4 accommodates a plurality of magnets 5 combined in series so that opposite magnetic poles face each other. The pipe-shaped member 4 and the magnet 5 serve as a stator 6 of the shaft type linear motor.

  The apparatus body 2 is provided with a feeding mechanism 10. The feeding mechanism 10 has a trapezoidal screw 11, and the trapezoidal screw 11 is rotatably supported by a pair of support bases 12 and is rotated clockwise and counterclockwise by a handle 13. Further, a shaft-like member 20 is supported on the pair of support bases 12, and a connecting member 14 is fixed to the shaft-like member 20. The connecting member 14 moves on the trapezoidal screw 11 by the rotation of the trapezoidal screw 11, and the shaft-like member 20 moves in parallel with the longitudinal direction of the pipe-like member 4 by the movement of the connecting member 14.

  A cradle 30 is disposed between the opening 4 a of the pipe-shaped member 4 and the distal end portion 20 a of the shaft-shaped member 20, and a magnet housing member 31 is disposed on the cradle 30. Inside the magnet housing member 31, the magnets 5 are housed in an aligned manner so that the magnetic poles attract each other in the direction of the side surfaces. The magnet 5 is abutted against the abutment surface 30a of the cradle 30 by a force such as its own weight or spring pressure from the magnet housing member 31. At this time, the material of the abutting surface 30a is preferably composed of a material (for example, resin) having a hardness equal to or less than that of the magnet 5.

  In this embodiment, a permanent magnet is used as the magnet 5, and a cylindrical or columnar magnet is used. The material of the magnet 5 is preferably a rare earth magnet having a high magnetic flux density. In particular, the rare earth magnet is preferably a neodymium-based magnet, for example, a neodymium-iron-boron magnet (Nd-Fe-B magnet), and high thrust can be obtained as compared with other magnets.

  A sealing member 40 having an outer dimension equivalent to that of the magnet 5 is accommodated at the top of the magnet 5.

  The opening 4 a of the pipe-like member 4 is opened and closed by a shutter 32. When the shutter 32 is opened and the handle 13 is operated to rotate the trapezoidal screw 11, the shaft-like member 20 is advanced by the connecting member 14, and the tip portion 20 a pushes the magnet 5 positioned at the lowermost part of the magnet housing member 31. The magnet 5 is fed into the opening 4 a of the pipe-like member 4.

  The magnet 5 pressed against the abutting surface 30a is pushed into the opening 4a of the pipe-like member 4 by the shaft-like member 20, and when the magnet 5 enters the opening 4a of the pipe-like member 4, the magnet 5 repels by the shutter 32. Hold down so that it doesn't pop out.

  When the trapezoidal screw 11 is rotated in the reverse direction by operating the handle 13 after feeding the magnet 5, the shaft-like member 20 is moved backward by the connecting member 14 and the tip portion 20 a is retracted from the lowermost portion of the magnet housing member 31. By this retreat, the magnet 5 in the magnet housing member 31 is translated in the longitudinal direction and the vertical direction of the pipe-like member 4, and the lowermost magnet 5 is positioned on the cradle 30.

  When the trapezoidal screw 11 is rotated again by operating the handle 13, the shaft-like member 20 is advanced by the connecting member 14, and the tip portion 20 a pushes the magnet 5 positioned at the lowermost part of the magnet housing member 31, and the magnet 5 is piped. Into the opening 4a of the shaped member 4.

  By repeating this operation, the shaft-like member 20 reciprocates, and the magnets 5 can be sequentially packed. After a predetermined number of magnets 5 have been fed, a sealing member 40 having an outer dimension equivalent to that of the magnet 5 is fed in the same manner as the magnet 5, and the magnet 5 is sealed to the pipe-shaped member 4.

  The fixing of the sealing member 40 is performed as shown in FIGS. 4 and 5. Finally, a member for sealing the magnet 5 is pushed in, and the magnets 5 that repel each other are pressed down. That is, the fixing ring 50 is fitted with accuracy (to a light press-fitting degree) with respect to the outer diameter of the pipe-like member 4 and is passed in advance when setting the pipe-like member 4 in the apparatus body 2. At this time, the fixing ring 50 may be adhered to the pipe-like member 4 or may be held by friction between parts that are only lightly press-fitted.

  After the magnet 5 is packed in the pipe-shaped member 4, the spacer 51 and the sealing member 40 are sequentially packed, and when the sealing member 40 is inserted, the fixing ring 50 is fixed to the sealing member 40 with the three screws 53. The sealing member 40 is provided with a face 40a, such as a D-cut, so that the direction of the (screw) hole of each component can be determined by the face 40a. In this embodiment, when the sealing member 40 is packed, a guide member (not shown) is packed against the direction of the (screw) hole when it is fed into the pipe-shaped member 4 by the surface 40a.

  Next, the screw 54 is screwed into the sealing member 40 from the axial direction, and the spacer 51 is pushed in to eliminate the gap between the magnets 5 caused by the repulsive force of the magnet 5. The spacer 51 is used because the magnet 5 may be damaged when the screw 54 directly hits the magnet 5. The fixing ring 50, the pipe-like member 4, and the sealing member 40 are all made of a nonmagnetic member (brass, aluminum, etc.).

  In this embodiment, detection means is provided so that the magnetic poles of the magnet 5 to be packed first are all in the same direction, and the magnet housing member 31 has a structure that can be fixed only in one direction.

  In this way, by moving the magnet 5 in the longitudinal direction of the pipe-like member 4 in the shaft-like member 20 and storing the magnet 5 in the pipe-like member 4, the forces of the magnets 5 that repel each other with a simple configuration. The magnet 5 can be stored in the pipe-shaped member 4 easily and easily. Further, the magnet 5 is translated between the opening 4a of the pipe-like member 4 and the shaft-like member 20 in the longitudinal direction and the vertical direction of the pipe-like member 4, and the magnet 5 is fed into the opening 4a of the pipe-like member 4. Thus, the magnet 5 can be stored in the pipe-shaped member 4 easily and easily with a simple configuration. In this embodiment, the magnet 5 is translated between the opening 4a of the pipe-like member 4 and the shaft-like member 20 in the longitudinal direction and the vertical direction of the pipe-like member 4. However, the present invention is not limited to this. When the magnet 5 moves in parallel to the longitudinal direction of the pipe-like member 4, it may be translated from a direction of 45 ° with respect to the longitudinal direction of the pipe-like member 4, for example. Further, when the pipe-like member 4 is horizontally arranged in the longitudinal direction, the magnet 5 is not limited to the above-described vertical direction and 45 ° direction, and the magnet 5 may be translated from the horizontal direction. Well, the direction of translation is not particularly limited.

  Further, after a predetermined number of magnets 5 have been fed, a sealing member 40 having an outer dimension equivalent to that of the magnet 5 is fed in the same manner as the magnet 5, and the magnet 5 is sealed to the pipe-shaped member 4, and the magnet 5 Since the same mechanism as that for housing the pipe in the pipe-shaped member 4 is used, a simple configuration can be achieved. The predetermined number of magnets 5 is the number of magnets required according to the conveyance distance of the shaft type linear motor, and the number of necessary magnets is basically set by the distance to be conveyed by the shaft type linear motor.

  The present invention is particularly applicable to a shaft type linear motor manufacturing method and a shaft type linear motor manufacturing apparatus configured by combining a plurality of magnets, and can easily and easily store repulsive magnets with a simple configuration. it can.

It is a schematic block diagram of the manufacturing apparatus of a shaft type linear motor. It is an enlarged view of a fixed base part. FIG. 3 is a cross-sectional view taken along line III-III in FIG. It is sectional drawing of the fixing | fixed part of the sealing member of the rear-end part of a shaft type linear motor. It is a front view of the fixing | fixed part of the sealing member of the rear-end part of a shaft type linear motor.

Explanation of symbols

1 Shaft type linear motor manufacturing equipment
2 Main unit
3 Fixed base
4 Pipe-shaped member
5 Magnet
10 Feed mechanism
11 Trapezoidal screw
12 Support base
20 Shaft-shaped member
30 cradle
30a Butting surface
31 Magnet housing material
32 Shutter
40, 60 Sealing material

Claims (8)

In a manufacturing method of a shaft type linear motor in which a plurality of adjacent magnets are housed in a pipe-like member so as to repel each other and a stator is assembled,
A fixing base for fixing the pipe-shaped member;
A shaft-like member that moves parallel to the longitudinal direction of the pipe-like member,
A method of manufacturing a shaft-type linear motor, wherein the shaft-like member moves the magnet parallel to the longitudinal direction of the pipe-like member, and the magnet is housed in the pipe-like member. Moving the magnet in parallel with the longitudinal direction of the pipe-shaped member between the opening of the pipe-shaped member and the shaft-shaped member;
2. The method of manufacturing a shaft type linear motor according to claim 1, wherein the magnet is fed into an opening of the pipe-shaped member.   3. The magnet according to claim 1, wherein the magnets fed between the opening of the pipe-shaped member and the shaft-shaped member are aligned so that magnetic poles attract each other in the lateral direction. Manufacturing method of shaft type linear motor. After a predetermined number of the magnets have been fed, a sealing member having an outer dimension equivalent to that of the magnets is fed in the same manner as the magnets,
The method for manufacturing a shaft-type linear motor according to any one of claims 1 to 3, wherein the magnet is sealed to the pipe-shaped member. In a manufacturing apparatus of a shaft type linear motor in which a plurality of adjacent magnets are housed in a pipe-like member so as to repel each other and a stator is assembled,
A fixing base for fixing the pipe-shaped member;
A shaft-like member that moves parallel to the longitudinal direction of the pipe-like member;
A feed mechanism that translates the magnet in the longitudinal direction of the pipe-shaped member by the shaft-shaped member, and stores the magnet in the pipe-shaped member;
An apparatus for manufacturing a shaft-type linear motor, comprising: The feeding mechanism is
Moving the magnet in parallel with the longitudinal direction of the pipe-shaped member between the opening of the pipe-shaped member and the shaft-shaped member;
6. The shaft type linear motor manufacturing apparatus according to claim 5, wherein the magnet is fed into an opening of the pipe-shaped member.   7. The shaft according to claim 5, wherein magnets fed between the opening of the pipe-shaped member and the shaft-shaped member are aligned so that magnetic poles attract each other in the lateral direction. Type linear motor manufacturing equipment. After a predetermined number of the magnets have been fed, a sealing member having an outer dimension equivalent to that of the magnets is fed in the same manner as the magnets,
8. The shaft type linear motor manufacturing apparatus according to claim 5, wherein the magnet is sealed in the pipe-shaped member.