JP4708846B2 - Magnetic spring device with locking mechanism and multi-point support device - Google Patents

Description

  The present invention relates to a magnetic spring device with a lock mechanism that applies a constant force in the axial direction, and a multipoint support device that supports a workpiece (for example, a substrate) using a plurality of the magnetic spring devices.

  For example, when solder printing is performed on a double-sided mounting substrate after single-sided mounting, it is necessary to support the substrate in accordance with the unevenness of the mounted surface (support surface) in order to obtain a stable squeegee pressure. As a support device for supporting a substrate, a plurality of pins are erected on a base, and the height position of the pin (projection length from the base) is set according to the unevenness of the mounting substrate. A multi-point support device for supporting the substrate at multiple points is used. However, when this type of support device is used for workpieces (substrates, etc.) produced in a wide variety and in small quantities, a dedicated device corresponding to the product type is manufactured, or the arrangement of a large number of pins is changed manually. It is necessary to change the setup. For this reason, conventionally, a multi-point support device that can handle a wide variety of products is desired in order to reduce manufacturing costs.

Therefore, conventionally, a multipoint support device using a coil spring has been proposed (see, for example, Patent Document 1). The multi-point support device described in Patent Document 1 is configured to support a workpiece by a plurality of rods by adjusting a height position by moving a rod (pin) in and out by a spring force of a coil spring.
JP 2002-323014 A

  However, since the multipoint support device described in Patent Document 1 is configured to use the spring force of a coil spring, when supporting a workpiece with irregularities such as a single-side mounted substrate as described above. There is a problem that the height position of the workpiece cannot be accurately copied. That is, the spring force of the coil spring changes according to the amount of expansion / contraction (the amount of stroke of the rod) (for example, the spring force becomes stronger as it contracts), so the pressing force (spring force applied from the rod to the workpiece) The force generated by the restoration of () will also change. Therefore, in the multipoint support device described in Patent Document 1, when supporting a workpiece with unevenness, the force that supports the workpiece for each rod by changing the stroke of the rod (the spring force also changes) according to the shape of the workpiece. However, the workpiece cannot be supported in a stable state.

  The present invention has been made paying attention to such problems existing in the prior art, and its purpose is to provide a lock mechanism capable of obtaining a constant spring force even when the stroke of the movable member changes. The object is to provide a magnetic spring device. Another object of the present invention is to provide a multi-point support device that can support a workpiece having irregularities with a constant spring force even when the stroke of the movable member changes, and can support the workpiece in a stable state. .

In order to solve the above-described problems, in the magnetic spring device with a lock mechanism according to claim 1, a shaft-shaped movable member is inserted into a tubular fixed member so as to be able to move in and out, and the fixed member and the movable member A magnetic spring mechanism in which magnets are arranged opposite to each other and the opposing magnets are magnetized with different magnetic poles, and a lock mechanism that restricts movement of the movable member in the fixed member by contact with the movable member The lock mechanism includes a plurality of spheres disposed on the outer peripheral surface of the movable member, and the sphere is sandwiched between the outer peripheral surface of the movable member. A support member having a tapered surface or a circular arc surface that is reduced in diameter along the direction in which the movable member is retracted, and an extruding member that is deformed by receiving air pressure and pushing the sphere in the direction in which the movable member is ejected. The movable member has a front The sphere that rolls in the immersion motion direction in conjunction with the immersion motion is locked by being pressed between the tapered surface or the arc surface formed on the support member and the outer peripheral surface of the movable member. In addition, the gist of the invention is that the lock is released when the pressed spherical body is pushed out by deformation of the pushing member .
The invention according to claim 2 is summarized in that, in the magnetic spring device with a lock mechanism according to claim 1, the pushing member is disposed so as not to contact the outer peripheral surface of the movable member.

According to a third aspect of the present invention , a shaft-shaped movable member is inserted into a tubular fixed member so as to be capable of moving in and out, and a magnet is disposed opposite to the fixed member and the movable member, and the opposed magnets are arranged between each other. A magnetic spring device with a lock mechanism comprising: a magnetic spring mechanism magnetized with different magnetic poles; and a lock mechanism that restricts movement of the movable member within the fixed member by contact with the movable member, The lock mechanism is disposed and fixed between an inner peripheral surface of the fixed member and an outer peripheral surface of the movable member , and receives and expands and deforms when receiving air pressure, and recovers when the air pressure is not received. The gist of the invention is that the movable member is locked by friction generated between the elastic body that has been expanded and deformed, the inner peripheral surface of the fixed member, and the outer peripheral surface of the movable member.

According to a fourth aspect of the present invention , a shaft-shaped movable member is inserted into a tubular fixed member so as to be capable of moving in and out, and a magnet is disposed opposite to the fixed member and the movable member, and the opposing magnets are arranged between each other. A magnetic spring device with a lock mechanism comprising: a magnetic spring mechanism magnetized with different magnetic poles; and a lock mechanism that restricts movement of the movable member within the fixed member by contact with the movable member, The movable member is a hollow shaft, and the lock mechanism is disposed in a fixed position in the movable member, and has an elastic body that receives and expands and deforms when receiving air pressure and restores when the air pressure is not received. The gist of the invention is that the movable member is locked by friction generated between the expanded and deformed elastic body and the inner peripheral surface of the movable member.

The multipoint support device according to claim 5 is characterized in that a plurality of magnetic spring devices with a lock mechanism according to any one of claims 1 to 4 are arranged on a base.

According to the magnetic spring device with a lock mechanism of the present invention, a constant spring force can be obtained even if the stroke of the movable member changes.
In addition, according to the multipoint support device of the present invention, a workpiece with unevenness can be supported with a constant spring force even when the stroke of the movable member changes, and the height position of the workpiece can be stabilized.

(First embodiment)
A first embodiment of the present invention will be described below with reference to FIGS.
FIG. 1 is a cross-sectional view of a magnetic spring device 10 with a lock mechanism according to this embodiment. A magnetic spring device 10 with a lock mechanism includes a movable shaft 12 as a movable member that is movable in the axial direction of the main body case 11 in a main body case 11 as a cylindrical (tubular) fixing member that is open on both sides. Is housed. The movable shaft 12 is accommodated in the main body case 11 so that it can move in and out. The movable shaft 12 is formed in a cylindrical shape. In addition, the movable shaft 12 of the present embodiment is made of high carbon chromium bearing steel (SUJ2), and is subjected to induction hardening treatment and chromium plating treatment. In the main body case 11, various constituent members of the magnetic spring mechanism 13 and various constituent members of the lock mechanism 14 are arranged in parallel along the moving direction of the movable shaft 12 so as to surround the movable shaft 12. .

  A magnet (permanent magnet) 15 as a magnet is provided on the inner peripheral surface of the main body case 11, and a magnet (permanent magnet) 16 as a magnet faces the magnet 15 on the outer peripheral surface of the movable shaft 12. It is provided as follows. The magnets 15 and 16 are formed in a cylindrical shape. In the present embodiment, the magnets 15 and 16 are bonded and fixed to the inner peripheral surface of the main body case 11 and the outer peripheral surface of the movable shaft 12. Further, the magnets 15 and 16 are arranged with a space in the radial direction between the main body case 11 and the movable shaft 12. The magnet 15 and the magnet 16 constitute a magnetic spring mechanism 13.

  Moreover, the magnet 15 and the magnet 16 are formed so that the length dimension of an axial direction becomes the same length. Further, as shown in FIG. 3 (a), the magnets 15 and 16 are divided into four in the circumferential direction, and N pole bands 15N and 16N and S pole bands 15S and 15S formed in a band shape with a width of 90 degrees. Are arranged alternately. The magnet 15 and the magnet 16 are configured such that different magnetic poles are alternately arranged opposite to each other. The magnetic spring mechanism 13 exerts a spring function by generating a magnetic force that acts so that the magnet 15 and the magnet 16 attract relative displacement between the main body case 11 and the movable shaft 12.

  A first housing 17 that houses components of the lock mechanism 14 and a second housing 18 as a support member are housed on the inner peripheral surface of the main body case 11. FIG. 2 is an enlarged cross-sectional view in which main portions of the first housing 17 and the second housing 18 are enlarged.

  In the first housing 17, an air introduction passage 23 is formed which communicates an air port 19 formed through the main body case 11 with a storage chamber 22 in which a rubber packing 20 and a flat washer 21 as an extrusion member are accommodated. ing. The packing 20 is accommodated in the accommodation chamber 22 so as not to contact the outer peripheral surface of the movable shaft 12. That is, there is no friction between the movable shaft 12 and the packing 20. The first housing 17 is accommodated in the main body case 11 with a pair of O-rings 24 interposed in the vicinity of the connection portion between the air port 19 and the air introduction passage 23 of the main body case 11.

  The second housing 18 is formed in a cylindrical shape with both sides open, and a tapered surface 25 is formed in one of the openings (left opening in FIGS. 1 and 2) so that the inner diameter of the second housing 18 is reduced. Has been. The tapered surface 25 is reduced in diameter along the direction in which the movable shaft 12 is retracted. The second housing 18 accommodates a plurality of steel balls 26 as a sphere, a flat washer 27, a coil spring 28, and a linear bush 29 in order from the tapered surface 25 side. In the present embodiment, the steel ball 26 is formed of the same material (SUJ2) as the movable shaft 12. Further, a spacer 30 is interposed between the flat washer 21 accommodated in the accommodation chamber 22 of the first housing 17 and the steel ball 26 accommodated in the second housing 18.

  As shown in FIG. 3B, the plurality of steel balls 26 are inserted between the inner peripheral surface of the second housing 18 and the outer peripheral surface of the movable shaft 12 so as to surround the outer periphery of the movable shaft 12. Are arranged. That is, the steel ball 26 is sandwiched between the outer peripheral surface of the movable shaft 12 and the inner peripheral surface of the second housing 18. The plurality of steel balls 26 are provided such that each steel ball 26 comes into contact (point contact) with the outer peripheral surface of the movable shaft 12. Further, the plurality of steel balls 26 are provided so as to be able to move on the inner peripheral surface (including the tapered surface) of the second housing 18 in the axial direction of the second housing 18 under a predetermined force. .

  A bearing 31 is provided in the main body case 11 adjacent to the magnet 15. Further, a wave washer 32 is provided in the main body case 11 adjacent to the second housing 18, and the wave washer 32 is prevented from coming off by a retaining ring 33. Further, a stopper 34 for restricting the amount of movement of the movable shaft 12 is fastened by a fastener (bolt or the like) 35 on the base end side (left end portion in FIG. 1) of the movable shaft 12. The movable shaft 12 can move in the axial direction within a range until the stopper 34 contacts the bearing 31. “X” shown in FIG. 1 is the maximum stroke length of the movable shaft 12.

Hereinafter, the operation of the magnetic spring device 10 with the lock mechanism of the present embodiment will be described.
As shown in FIG. 1, the magnetic spring device 10 with a lock mechanism is in a normal state (a state in which the magnetic spring device 10 is moving out for a maximum stroke length X), as shown in FIG. The magnet 16 is facing. That is, the movable shaft 12 is positioned with respect to the main body case 11 with the N pole bands 15N and 16N and the S pole bands 15S and 16S constituting the magnets 15 and 16 facing each other and attracting each other. Further, the steel ball 26 in the second housing 18 is not engaged with the tapered surface 25, and the lock of the movable shaft 12 is released (shown in FIGS. 1 and 2).

  In this state, when a workpiece or the like is pressed against the distal end side of the movable shaft 12 (right end portion in FIG. 1) and a pressing force is applied, the movable shaft 12 moves in the sunk direction (the direction from right to left in FIG. 1). Moving. At this time, the magnet 16 provided on the movable shaft 12 moves in the same direction together with the movable shaft 12. When the movable shaft 12 moves, an attractive force is exerted between the magnet 15 on the main body case 11 side and the magnet 16 on the movable shaft 12 side to pull back the moved magnet 16 relative to the magnet 15 whose position is fixed. Since this suction force acts so as to repel the displacement of the movable shaft 12, it acts as a cushion when the workpiece is pressed against the movable shaft 12, and further becomes a pressing force that presses the workpiece against the movable shaft 12. That is, the magnets 15 and 16 exhibit a spring force similarly to a coil spring or the like.

  Further, in the magnetic spring mechanism 13, when the magnets 15 and 16 act as "springs", an attractive force (thrust) acting in the axial direction to return the magnet 16 on the movable shaft 12 side to the original position is predetermined. The same value is shown between the strokes. In the magnetic spring mechanism 13, when the magnets 15 and 16 are displaced in the axial direction, a constant thrust is generated by the axial component of the magnetic lines of force generated obliquely at the ends of the magnets 15 and 16. That is, when the magnets 15 and 16 are displaced and overlapped, oblique magnetic lines of force are generated in the fixed direction (fixed inclination) at the ends of the magnets 15 and 16, and an axial force is applied to the overlapping portion therebetween. Magnetic field lines only in the vertical direction that do not affect For this reason, the axial force acts on the magnets 15 and 16 only by the axial component of the oblique lines of magnetic force generated at the ends regardless of the overlapping width. Therefore, the magnetic spring mechanism 13 always presses the work with a constant force.

  On the other hand, in the lock mechanism 14, when the movable shaft 12 moves in the sunk direction, the steel ball 26 that is in contact with the movable shaft 12 in accordance with the movement moves in the sunk direction of the movable shaft 12, that is, in the second housing 18. Roll toward the taper surface 25. Note that the spring force of the coil spring 28 acts on the steel ball 26 as an auxiliary force. The steel ball 26 meshes with a tapered surface 25 formed so as to reduce the inner diameter of the second housing 18, and is pressed between the tapered surface 25 and the movable shaft 12. As a result, the movable shaft 12 is locked by the steel ball 26 being pressed between the outer peripheral surface and the tapered surface 25, and the position is maintained. When the steel ball 26 rolls as described above, the flat washer 21 and the spacer 30 are pushed out toward the packing 20 side accommodated in the accommodation chamber 22 of the first housing 17.

  The lock mechanism 14 releases the lock state of the movable shaft 12 by supplying air (air) with a predetermined pressure from an air supply source (not shown) to the air port 19 in a state where no pressing force is applied to the movable shaft 12. To do. That is, the air supplied via the air port 19 is introduced into the accommodation chamber 22 through the air introduction passage 23 of the first housing 17. Then, the packing 20 accommodated in the accommodation chamber 22 is deformed by receiving air pressure (air pressure) and presses the flat washer 21. This pressing force is propagated to the steel ball 26 that is engaged with the tapered surface 25 via the plain washer 21 and the spacer 30, and the steel ball 26 that has received the pressing force is pushed out toward the flat washer 27 side. As a result, the steel ball 26 is released from the state of being bitten into the tapered surface 25, and the locked state of the movable shaft 12 is released. As a result, the movable shaft 12 moves in the outgoing direction by the action of the magnetic spring mechanism 13 (attraction force for attracting the magnet 16) by removing the workpiece. The packing 20 is restored by the spring force of the coil spring 28 when the supply of air is stopped.

  4 and 5 show a multipoint support device 40 using the magnetic spring device 10 with a lock mechanism of the present embodiment. The multipoint support device 40 is used, for example, as a support base that supports a single-side mounted substrate that becomes a workpiece at the time of solder printing in a substrate mounting process at a plurality of points.

  The multipoint support device 40 is configured by arranging a plurality of magnetic spring devices 10 with a lock mechanism on a base (for example, a block formed of aluminum) 41. In the multipoint support device 40 shown in FIG. 4 and FIG. 5, four magnetic spring devices 10 with a lock mechanism are arranged at predetermined intervals (equal intervals) in the vertical direction and the horizontal direction, respectively, for a total of 16 magnets with lock mechanisms. The spring device 10 is arranged and configured. Although the magnetic spring device 10 with a lock mechanism shown in FIGS. 1 to 3 is configured as a single-acting cylinder by housing the magnetic spring mechanism 13 and the lock mechanism 14 in the main body case 11, the multipoint support device 40 has a main body. Instead of the case 11, the magnetic spring mechanism 13 and the lock mechanism 14 are accommodated in a through hole 42 formed in the base 41. That is, in the multipoint support device 40, the base 41 is a fixing member.

  The base 41 has an air supply port 43 connected to an air supply source (not shown), and an air formed in the first housing 17 of each magnetic spring device 10 with a lock mechanism connected to the air supply port 43. A plurality of air supply passages 44 for supplying air to the introduction passage 23 are branched. Then, air from an air supply source is supplied to the air introduction passage 23 of each magnetic spring device with a lock mechanism 10 through the air supply passage 44.

  In the multipoint support device 40 configured as described above, a work (for example, a substrate) is placed on the tip side of the movable shaft 12 of each magnetic spring device 10 with a lock mechanism. Then, the movable shaft 12 of each magnetic spring device with a lock mechanism 10 abuts on the workpiece and moves in the sinking direction according to the unevenness of the workpiece. In other words, the movable shaft 12 of the magnetic spring device 10 with the lock mechanism that contacts the convex portion of the workpiece increases in the amount of sag, and the movable shaft 12 of the magnetic spring device 10 with the lock mechanism that contacts the concave portion of the workpiece slidably moves. The amount is reduced. In the multipoint support device 40, the movable shaft 12 of each magnetic spring device 10 with a lock mechanism moves in accordance with the unevenness of the workpiece, and the height position of the movable shaft 12 (projection length from the base 41) is automatically adjusted. And the workpiece is supported. Since the magnetic spring device with a lock mechanism 10 of the present embodiment includes the magnetic spring mechanism 13, the workpiece is always pressed by a constant force regardless of the stroke amount of the movable shaft 12 by the magnetic spring mechanism 13. .

  Each movable shaft 12 is moved by the lock mechanism 14 in accordance with the unevenness of the workpiece, and the position is held in that state. The lock is released by removing air from the movable shaft and supplying air to each air introduction passage 23 via the air supply passage 44.

According to the present embodiment, the following effects can be obtained.
(1) The magnetic spring device 10 with a lock mechanism includes a magnetic spring mechanism 13 and a lock mechanism 14. The magnetic spring device with a lock mechanism 10 generates a spring force in the same manner as the coil spring by the action of the magnet 15 and the magnet 16 constituting the magnetic spring mechanism 13, and the spring force is constant regardless of the stroke change of the movable shaft 12. The value of Therefore, even when a workpiece (for example, a substrate) is pressed against the movable shaft 12, a constant pressing force can be applied to the workpiece. Further, the magnetic spring device with a lock mechanism 10 holds the movable shaft 12 against the attractive force of the magnet 16 even when the movable shaft 12 moves in the sunk direction by the action of the lock mechanism 14. The stroke length can be reliably maintained at a length that matches the shape of the workpiece.

  (2) The lock mechanism 14 includes a steel ball 26 and a tapered surface 25 of the second housing 18 with which the steel ball 26 is engaged. That is, the movable shaft 12 is locked by pressing the steel ball 26 between the tapered surface 25 and the outer peripheral surface of the movable shaft 12. For this reason, the holding force of the movable shaft 12 can be increased, and the stroke length of the movable shaft 12 can be reliably maintained at a length that matches the shape of the workpiece.

  (3) A packing 20 is provided, and the packing 20 is deformed by air pressure to push out the steel ball 26 engaged with the tapered surface 25, thereby releasing the lock of the movable shaft 12. For this reason, the mechanism for releasing the lock can be simplified, and the structure of the magnetic spring device 10 with the lock mechanism can be simplified. Further, by simplifying the structure, it is possible to contribute to a reduction in manufacturing cost of the magnetic spring device 10 with a lock mechanism.

  (4) The packing 20 is disposed so as not to contact the outer peripheral surface of the movable shaft 12. For this reason, when the lock is released and the movable shaft 12 moves in the outward direction, the movable shaft 12 can be operated smoothly without causing friction between the movable shaft 12 and the packing 20.

  (5) The multipoint support device 40 is configured using the magnetic spring device 10 with a lock mechanism of the present embodiment. For this reason, since the movable shaft 12 of each magnetic spring device with a lock mechanism 10 comes into contact with the workpiece with a constant pressing force, the height of the movable shaft 12 can be increased even if it comes into contact with a workpiece having an unevenness (a workpiece having a height). There is no variation in position, and the workpiece can be accurately copied. Therefore, even when the stroke of the movable shaft 12 changes, the workpiece with unevenness can be supported with a constant spring force, and the height position of the workpiece can be stabilized.

  (6) For example, when the multipoint support device 40 of the present embodiment is used in a solder printing machine used when solder printing is performed on a substrate after single-sided mounting, a stable squeegee pressure can be obtained. No printed film thickness can be obtained.

  (7) Further, the pressing force applied to the work by the magnetic spring mechanism 13 is the same at any point (any support part), and damage to the work can be prevented. That is, even if the workpiece is pressed against the movable shaft 12 of each magnetic spring device 10 with a lock mechanism, the workpiece can be prevented from being damaged without applying a biased force.

(Second Embodiment)
Next, a second embodiment of the present invention will be described with reference to FIG. In the embodiments described below, the same components as those in the embodiments described above are denoted by the same reference numerals, and the redundant description thereof is omitted or simplified.

  In the magnetic spring device 50 with a lock mechanism of the present embodiment, a movable shaft 51 as a movable member that is movable along the axial direction of the main body case 11 is accommodated in the main body case 11. The movable shaft 51 is accommodated in the main body case 11 so as to be able to appear and retract. The movable shaft 51 is formed in a cylindrical shape (pipe shape). Further, the movable shaft 51 of the present embodiment is formed of stainless steel. In the main body case 11, various constituent members of the magnetic spring mechanism 13 and various constituent members of the lock mechanism 52 are arranged in parallel along the moving direction of the movable shaft 51 so as to surround the movable shaft 51. The magnetic spring mechanism 13 of the present embodiment includes a magnet 15 that is bonded and fixed to the inner peripheral surface of the main body case 11 and a magnet 16 that is bonded and fixed to the inner peripheral surface of the movable shaft 51. The basic configuration and operating principle of the magnetic spring mechanism 13 of the present embodiment are the same as those of the magnetic spring mechanism 13 of the first embodiment.

  In the main body case 11, packing 53 as an elastic body that is deformed by receiving air pressure, an O-ring 54, and a bush 55 are accommodated on both the left and right sides of the magnet 15. A stopper member 56 is accommodated in the main body case 11. Further, an air port 57 is formed through the main body case 11. In addition, case cap members 58 and 59 are fitted into both side openings of the main body case 11, and a vacuum drawing port 60 is formed in the case cap member 58.

  In addition, shaft cap members 61 and 62 are fitted into the opening on both sides of the movable shaft 51, respectively, and a washer that can come into contact with the stopper member 56 to restrict the amount of movement of the movable shaft 51. 63 is fastened by a fastener (bolt or the like) 64. The movable shaft 51 can move in the axial direction within a range until the washer 63 comes into contact with the stopper member 56.

  Hereinafter, the operation of the magnetic spring device 50 with the lock mechanism of the present embodiment will be described. In addition, since the effect | action of the magnetic spring mechanism 13 provided in the magnetic spring apparatus 50 with a lock mechanism of this embodiment is the same as the effect | action demonstrated in 1st Embodiment, the duplicate description is abbreviate | omitted and the lock mechanism is omitted. The operation of 52 will be mainly described.

  The lock mechanism 52 of this embodiment supplies air of a predetermined pressure to an air port 57 from an air supply source (not shown), thereby deforming the packing 53 with the air pressure and locking the movable shaft 51. That is, when the packing 53 receives air pressure and deforms, the outer surface thereof contacts the inner peripheral surface of the main body case 11 and the outer peripheral surface of the movable shaft 51. By this contact, friction is generated between the main body case 11 and the packing 53 and between the movable shaft 51 and the packing 53, and the movable shaft 51 is locked by the friction force, and the position is maintained. The air supplied from the air port 57 is also supplied to the packing 53 through the gap between the magnet 15 and the magnet 16. That is, the lock mechanism 52 of the present embodiment deforms the packings 53 disposed on both the left and right sides of the magnet 15 and uses the friction generated between the packing 53 and the main body case 11 and the movable shaft 51 to move the movable shaft. 51 is locked.

  In the lock mechanism 52, the lock state is released by stopping the supply of air from the air port 57. That is, when the supply of air is stopped, the packing 53 is restored and brought into a non-contact state with respect to the main body case 11 and the movable shaft 51. Thereby, the locked state of the movable shaft 51 is released. As a result, the movable shaft 51 moves in the outgoing direction by the action of the magnetic spring mechanism 13 (attraction force for attracting the magnet 16) by removing the workpiece.

  In addition, in the magnetic spring device 50 with a lock mechanism of this embodiment, a vacuum drawing port 60 is provided. For this reason, the movable shaft 51 can be drawn into the main body case 11 (moved in the sinking direction) by evacuating through the vacuum drawing port 60. For example, when the multi-point support device 40 shown in FIGS. 4 and 5 is configured using the magnetic spring device 50 with a lock mechanism of the present embodiment, the operation is performed by moving the movable shaft 51 on which no workpiece is mounted in the main body case 11. This is done when storing the unit. Thereby, it can suppress that the movable axis | shaft 51 which does not support a workpiece | work obstructs work (for example, interference with a solder printing machine etc.).

According to the present embodiment, in addition to the effects (1) and (5) to (7) of the first embodiment, the following effects can be obtained.
(8) A packing 53 is provided between the main body case 11 and the movable shaft 51, and the movable shaft is deformed by the friction between the packing 53, the main body case 11 and the movable shaft 51 by deforming the packing 53 with air pressure. 51 was locked. For this reason, the lock mechanism 52 can be simplified and the structure of the magnetic spring device 50 with the lock mechanism can be simplified. Further, since the packing 53 is restored when the air pressure is not received and the locked state is released, the mechanism can be simplified.

  (9) The packings 53 are provided on both the left and right sides of the magnet 15, and the pair of packings 53 are deformed by air pressure to lock the movable shaft 51. For this reason, the holding force of the movable shaft 12 can be increased, and the stroke length of the movable shaft 12 can be reliably maintained at a length that matches the shape of the workpiece.

(Third embodiment)
Next, a third embodiment of the present invention will be described with reference to FIG.
In the magnetic spring device 70 with a lock mechanism of the present embodiment, a movable shaft 71 as a movable member that is movable along the axial direction of the main body case 11 is accommodated in the main body case 11. The movable shaft 71 is accommodated in the main body case 11 so that it can move in and out. The movable shaft 71 is formed in a cylindrical shape (pipe shape). The movable shaft 71 of this embodiment is a hollow shaft. Moreover, the movable shaft 71 of this embodiment is formed of stainless steel. In the main body case 11, various constituent members of the magnetic spring mechanism 13 and various constituent members of the lock mechanism 72 are arranged in parallel along the moving direction of the movable shaft 71 so as to surround the movable shaft 71. The magnetic spring mechanism 13 of the present embodiment includes a magnet 15 that is bonded and fixed to the inner peripheral surface of the main body case 11 and a magnet 16 that is bonded and fixed to the inner peripheral surface of the movable shaft 71. The basic configuration and operating principle of the magnetic spring mechanism 13 of the present embodiment are the same as those of the magnetic spring mechanism 13 of the first embodiment.

  Further, bushes 73 and 74 are provided on the left and right sides of the magnet 15 in the main body case 11. A case cap member 76 in which an air port 75 is formed is fitted into the main body case 11, and an air supply pipe 77 connected to the air port 75 is attached to the case cap member 76. The air supply pipe 77 is a member having a diameter smaller than the diameter of the movable shaft 71 and extends in the movable shaft 71. The air supply pipe 77 is formed with an air discharge hole 78 in the vicinity of the tip thereof. Also, a pad member 79 as an elastic body that is deformed by receiving air pressure is attached to the tip of the air supply pipe 77. In this embodiment, the pad member 79 is made of urethane. The pad member 79 is formed in a bag shape. The pad member 79 is accommodated in the movable shaft 71. Further, the pad member 79 is disposed on the distal end side of the movable shaft 71 with respect to the magnet 16. The pad member 79 is provided with an O-ring 80 so as to be interposed between the outer peripheral surface of the air supply pipe 77.

  A shaft cap member 81 is fitted into the opening of the movable shaft 71 (the right opening in FIG. 7). The movable shaft 71 can move in the axial direction within a range until the shaft cap member 81 contacts the pad member 79. The movable shaft 71 moves along the axial direction of the main body case 11 on the outer surfaces of the air supply pipe 77 and the pad member 79 whose positions are fixed.

  Hereinafter, the operation of the magnetic spring device with a lock mechanism 70 of the present embodiment will be described. In addition, since the effect | action of the magnetic spring mechanism 13 provided in the magnetic spring apparatus 70 with a lock mechanism of this embodiment is the same as the effect | action demonstrated in 1st Embodiment, the overlapping description is abbreviate | omitted and the lock mechanism is omitted. Description will be made centering on the action of 72.

  The lock mechanism 72 of the present embodiment supplies air of a predetermined pressure from an air supply source (not shown), and the air passes through the air supply pipe 77 and the air discharge hole 78 and is supplied to the pad member 79. Then, the pad member 79 is deformed so as to expand upon receiving air pressure, and locks the movable shaft 71. That is, when the pad member 79 is deformed by receiving air pressure, its outer surface comes into contact with the inner peripheral surface of the movable shaft 71. By this contact, friction is generated between the movable shaft 71 and the pad member 79, and the movable shaft 71 is locked by the friction force, and the position is maintained.

  In the lock mechanism 72, the lock state is released by stopping the supply of air from the air port 75. That is, when the supply of air is stopped, the pad member 79 is restored and brought into a non-contact state with respect to the movable shaft 71. Thereby, the locked state of the movable shaft 71 is released. As a result, the movable shaft 71 moves in the outgoing direction by the action of the magnetic spring mechanism 13 (attraction force for attracting the magnet 16) by removing the workpiece.

According to the present embodiment, in addition to the effects (1) and (5) to (7) of the first embodiment, the following effects can be obtained.
(10) The pad member 79 is provided in the movable shaft 71, and the pad member 79 is deformed by air pressure so that the movable shaft 71 is locked by friction generated between the pad member 79 and the movable shaft 71. . For this reason, the lock mechanism 72 can be simplified and the structure of the magnetic spring device 70 with a lock mechanism can be simplified. Further, since the pad member 79 is restored when the air pressure is not received and the locked state is released, the mechanism can be simplified.

In addition, you may change this embodiment as follows.
In the first embodiment, the number and size of the steel balls 26 may be changed.
In the first embodiment, a circular arc surface may be used instead of the tapered surface 25.

In the first and second embodiments, the packing 20 or the packing 53 may be a Y packing or a V packing.
In each embodiment, the radix of the magnetic spring devices 10, 50, 70 with a lock mechanism arranged as the multipoint support device 40 may be changed.

  In the second embodiment, the lock mechanism 52 may be configured by one packing 53, or the lock mechanism 52 may be configured by using three or more packings 53.

Sectional drawing of the magnetic spring apparatus with a locking mechanism of 1st Embodiment. The principal part expanded sectional view of the magnetic spring apparatus with the lock mechanism. (A) is the sectional view on the AA line of FIG. 1, (b) is the sectional view on the BB line of FIG. The top view of a multipoint support device. CC sectional view taken on the line of FIG. Sectional drawing of the magnetic spring apparatus with a locking mechanism of 2nd Embodiment. Sectional drawing of the magnetic spring apparatus with a locking mechanism of 3rd Embodiment.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10, 50, 70 ... Magnetic spring apparatus with a lock mechanism, 11 ... Main body case (fixed member), 12, 51, 71 ... Movable shaft (movable member), 13 ... Magnetic spring mechanism, 14, 52, 72 ... Lock mechanism, DESCRIPTION OF SYMBOLS 15,16 ... Magnet (magnet), 18 ... 2nd housing (support member), 20 ... Packing (extrusion member), 25 ... Tapered surface, 26 ... Steel ball (sphere), 40 ... Multipoint support apparatus, 41 ... Base Table 53, packing (elastic body), 78, pad member (elastic body).

Claims (5)

A shaft-shaped movable member is inserted into the tubular fixed member so as to be able to appear and retract,
A magnet spring mechanism in which magnets are arranged opposite to the fixed member and the movable member, and the magnets facing each other are magnetized with different magnetic poles;
A magnetic spring device with a lock mechanism comprising a lock mechanism for restricting movement of the movable member in the fixed member by contact with the movable member ;
The locking mechanism is
A plurality of spheres arranged on the outer peripheral surface of the movable member;
A support member in which the spherical body is sandwiched between the outer peripheral surface of the movable member and a tapered surface or a circular arc surface is formed that is reduced in diameter along the direction of the immersion of the movable member;
An extrusion member that receives and deforms air pressure, and pushes out the sphere in the moving-out direction of the movable member;
The movable member is
The sphere that rolls in the direction of the immersion operation in conjunction with the immersion operation is locked by being pressed between the tapered surface or the arc surface formed on the support member and the outer peripheral surface of the movable member. And the lock is released when the pressed spherical body is pushed out by deformation of the pushing member . The magnetic spring device with a lock mechanism according to claim 1, wherein the push member is disposed so as not to contact an outer peripheral surface of the movable member . A shaft-shaped movable member is inserted into the tubular fixed member so as to be able to appear and retract,
A magnet spring mechanism in which magnets are arranged opposite to the fixed member and the movable member, and the magnets facing each other are magnetized with different magnetic poles;
A magnetic spring device with a lock mechanism comprising a lock mechanism for restricting movement of the movable member in the fixed member by contact with the movable member;
The lock mechanism is disposed and fixed between an inner peripheral surface of the fixed member and an outer peripheral surface of the movable member , and receives and expands and deforms when receiving air pressure, and recovers when the air pressure is not received. Have a body,
Said movable member, characterized the to Carlo click mechanism with magnetic spring to be locked by friction between the outer peripheral surface of the inner peripheral surface and the movable member of the elastic member and the fixing member which is deformed and opened apparatus. A shaft-shaped movable member is inserted into the tubular fixed member so as to be able to appear and retract,
A magnet spring mechanism in which magnets are arranged opposite to the fixed member and the movable member, and the magnets facing each other are magnetized with different magnetic poles;
A magnetic spring device with a lock mechanism comprising a lock mechanism for restricting movement of the movable member in the fixed member by contact with the movable member;
The movable member is a hollow shaft,
The lock mechanism is disposed in a fixed position in the movable member, and has an elastic body that receives an air pressure and expands and deforms and restores when the air pressure is no longer received,
Said movable member, a magnetic spring device with features and be Carlo click mechanism to be locked by friction between the inner peripheral surface of said movable member and said elastic body in which expansion deformation. A multipoint support device, wherein a plurality of magnetic spring devices with a lock mechanism according to any one of claims 1 to 4 are arranged on a base .

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