JP2012250323A - Attracting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an attracting device that can generate magnetism for attracting an object to be attracted without consuming electric power, and can attract the object to be attracted and release the attraction.SOLUTION: The attracting device 1 for attracting the object 90 to be attracted by the magnetism includes: a permanent magnet 2 for generating the magnetism; an attracting part 3 that is coupled to the north pole of the permanent magnet 2, brought into contact with the object 90 to be attracted and made of a magnetic material; a control tube 5 that encircles the permanent magnet 2 and made of a magnetic material; and a sliding mechanism 6 for relatively moving a positional relationship between the permanent magnet 2 and the control tube 5.

Description

  The present invention relates to an adsorption device that magnetically adsorbs an object to be adsorbed.

  At the manufacturing site of equipment and machines, adsorbed objects such as electronic parts, optical parts and machine parts are adsorbed and transported to a predetermined location on a printed circuit board, for example, or held for assembly or processing. An adsorbing device is used. Such an adsorption apparatus includes a vacuum adsorption type apparatus (for example, Patent Document 1) that sucks an object to be adsorbed by a pressure difference between a negative pressure and an atmospheric pressure in the suction nozzle, and an electromagnet. There is a magnetic adsorption type apparatus (for example, Patent Document 2) that generates a magnetism by passing an electric current through the magnetic field to adsorb an object to be adsorbed made of a magnetic material such as iron.

  Compared to vacuum adsorption type devices, magnetic adsorption type devices do not require large-scale equipment such as a vacuum pump, and even if there are irregularities or holes on the adsorption surface of the object to be adsorbed, stable adsorption is possible. Many are used when the adsorbent is a magnetic substance. However, in the magnetic attraction type apparatus, it is necessary to always flow a large current through the electromagnet during the adsorption, and there is a problem that power consumption is large. When the amount of power consumption is large, not only does the running cost increase, but it is necessary to consider the heat radiation (cooling) of the electromagnet that generates heat due to the power consumption. If the electromagnet does not sufficiently dissipate heat, the object to be adsorbed may rise in temperature and affect its characteristics.

JP 2009-111155 A JP-A-5-96486

  The present invention has been made to solve the above-described problem, and an adsorption device that can generate magnetism for adsorbing an object to be adsorbed without consuming electric power, and can adsorb and desorb the object to be adsorbed. The purpose is to provide.

  The adsorption device according to claim 1, which has been made to achieve the above object, is an adsorption device that magnetically adsorbs an object to be adsorbed, and is a permanent magnet for generating the magnetism. A magnetic-made attracting portion connected to one of the poles of the permanent magnet to be in contact with the object to be attracted, a magnetic-made control cylinder surrounding the permanent magnet, the permanent magnet and the control cylinder And a moving means for relatively moving the positional relationship.

  A suction device according to a second aspect is the one according to the first aspect, wherein the control cylinder is formed to have a size capable of accommodating the entire permanent magnet in the cylinder. .

  A suction device according to a third aspect is the one according to the second aspect, wherein the moving means relatively moves the positional relationship so that the entire permanent magnet is accommodated in the control cylinder. It is possible.

  According to a fourth aspect of the present invention, there is provided the adsorption device according to any one of the first to third aspects, wherein the moving means allows the one pole of the permanent magnet to enter and exit from the control cylinder to the outside. In addition, the positional relationship is relatively movable.

  An adsorption device according to a fifth aspect is the adsorption device according to any one of the first to fourth aspects, wherein the moving means is configured so that the other pole of the permanent magnet enters and exits the outside from the cylindrical shape. The positional relationship is relatively movable.

  Since the permanent magnet generates the magnetism for adsorbing the object to be adsorbed, the adsorption device of the present invention does not consume electric power unlike an electromagnet, and is an extremely energy saving device. In addition, since power is not consumed, there is no heat generation and the characteristics of the object to be adsorbed are not affected. According to the present invention, by moving the relative positional relationship between the permanent magnet and the magnetic control cylinder surrounding the permanent magnet, the magnetism generated in the magnetic attracting part connected to one pole of the permanent magnet. Since (adsorptive power) can be controlled, it is possible to adsorb and desorb an object to be adsorbed.

  When the control cylinder is formed in a size that can accommodate the entire permanent magnet in the cylinder, the relative position between the permanent magnet and the control cylinder is greater than that of a size that accommodates only a part of the permanent magnet. Thus, the control (variable) range of the attractive force when the positional relationship is changed can be widened.

  When the moving means can move the control cylinder to a position where the entire permanent magnet is accommodated in the control cylinder, the adsorption force hardly occurs when the adsorption is released, so that the adsorbed object can be removed smoothly. Can be made.

  When the moving means can relatively move the positional relationship between the permanent magnet and the control cylinder so that at least one pole of the permanent magnet enters and exits from the control cylinder, one pole enters the control cylinder. Since the adsorption force can be changed greatly depending on whether or not one of the poles is out of the control cylinder, adsorption of the object to be adsorbed and its release can be performed stably and reliably.

  When the moving means can relatively move the positional relationship between the permanent magnet and the control cylinder so that the other pole of the permanent magnet enters and exits from the inside of the cylinder, the attracting force can be changed further greatly. Therefore, the adsorption of the object to be adsorbed and the release thereof can be performed more stably and reliably.

It is a longitudinal cross-sectional view which shows the use condition (adsorption state) of the adsorption | suction apparatus to which this invention is applied. It is a longitudinal cross-sectional view which shows the use condition (release state) of the adsorption | suction apparatus to which this invention is applied.

  Hereinafter, although the example for implementing this invention is demonstrated in detail, the scope of the present invention is not limited to these forms.

  An example of an adsorption apparatus to which the present invention is applied is shown in FIGS. In both figures, the principal part of the adsorption | suction apparatus 1 is shown with the longitudinal cross-sectional view. The adsorption device 1 is configured to adsorb and hold an object to be adsorbed 90 made of a magnetic material by magnetism, and release the adsorption of the object to be adsorbed 90 after being transported to a predetermined place, for example. The adsorption device 1 includes a permanent magnet 2, an adsorption unit 3, a fixed unit 4, a control cylinder 5, and a slide mechanism 6. Moreover, although not shown in figure, the adsorption | suction apparatus 1 is provided with the xyz moving mechanism which moves these permanent magnets 2-slide mechanism 6 in the xyz-axis direction entirely.

  The permanent magnet 2 is a known permanent magnet such as a ferrite magnet, a neodymium magnet, or a samarium cobalt magnet, and generates magnetism having a strength necessary for attracting the object 90 to be adsorbed. The permanent magnet 2 is formed in a cylindrical or prismatic rod shape as an example, and one pole (N pole in this example) of the rod-like end is the lower side of the figure, and the other pole (S pole in this example). ) Are arranged in the direction of the upper side of the figure. In addition, you may arrange | position the polarity of the permanent magnet 2 upside down. The shape of the permanent magnet 2 is preferably a rod shape, but is not limited thereto, and may be any shape such as a plate shape, a ring shape, a spherical shape, a tetrahedral shape, or a polyhedral shape.

  The adsorption part 3 is formed of a soft (soft) magnetic material such as iron, silicon steel, permalloy, soft ferrite, or the like. It is preferable that the magnetic material used for the attracting part 3 has a small coercive force and a large magnetic permeability. For example, the attracting portion 3 has the same diameter as the permanent magnet 2 or a slightly thicker diameter, and is formed in a columnar or prismatic rod shape, for example. One end of the attracting portion 3 is bonded and fixed with an adhesive or the like so as to be coaxial with the central axis of the permanent magnet 2 at one pole side end portion of the permanent magnet 2. As shown in both figures, it is preferable from the viewpoint of assembly and performance that the end of the attracting portion 3 (the connecting portion with the permanent magnet 2) has a recess into which the end of the permanent magnet 2 is fitted. . Since the other end of the adsorbing part 3 comes into contact with the object to be adsorbed 90 and adsorbs the object to be adsorbed 90, it is preferable that the other end of the adsorbing part 3 is formed in a shape that matches the adsorbing part of the object to be adsorbed 90. For example, if the object to be adsorbed 90 is a flat plate shape, the other end of the adsorbing part 3 is preferably formed in a flat surface shape, and if the object to be adsorbed 90 is a convex shape, the other end is preferably formed in a concave shape.

  The fixing part 4 is formed in a bottomed cylindrical shape by way of example by a nonmagnetic material exemplified by a resin such as plastic, or a nonmagnetic metal such as copper or aluminum. At the center of the bottom of the fixing portion 4 (the lower side in the figure), a hole having a size through which the suction portion 3 just passes is formed. The attracting portion 3 is passed through the hole so that the permanent magnet 2 is positioned in the inner space of the fixed portion 4. The adsorbing part 3 is fixed to the fixing part 4 by a known fixing method such as bonding with an adhesive or fastening with a fastener so as not to drop out of the hole. In addition, it is preferable that the fixing part 4 is cylindrical because the permanent magnet 2 disposed in the cylinder and the control cylinder 5 described later are protected by the cylinder wall. However, as long as the adsorption part 3 can be fixed, The shape is not limited to a cylindrical shape, and may be various shapes such as a pillar shape, a plate shape, and a frame shape. Further, the top (upper side in the figure) may be sealed with a lid so that dust does not enter the inside of the cylindrical fixing portion 4.

  The control cylinder 5 is formed of a soft magnetic material such as iron, silicon steel, permalloy, or soft ferrite. It is preferable that the magnetic body used for the control cylinder 5 has a small coercive force and a large magnetic permeability. The control cylinder 5 is coaxial with the central axis of the rod-shaped permanent magnet 2 and is formed in a cylindrical shape (for example, a cylindrical shape or a rectangular tube shape) surrounding the permanent magnet 2. The control cylinder 5 is preferably formed in a size that can accommodate the entire permanent magnet 2 in the cylinder. In this example, the control cylinder 5 is longer in the axial direction than the permanent magnet 2. Is preferred. The control cylinder 5 is slidable in the axial direction. The inner wall of the control cylinder 5 and the side wall of the permanent magnet 2 are not in contact with each other and the gap is uniform. This gap is preferably a narrow gap.

  The slide mechanism 6 is an example of a moving means for relatively moving the positional relationship between the permanent magnet 2 and the control cylinder 5, and by changing the positional relationship between the permanent magnet 2 and the control cylinder 5, the adsorption unit 3 is used to control the magnetic attraction force. In this example, the slide mechanism 6 is connected to the control cylinder 5 and reciprocates the control cylinder 5 in the axial direction (vertical direction in the figure). As shown in FIG. 1, the slide mechanism 6 can move the control cylinder 5 to an upper position where both poles of the permanent magnet 2 come out of the cylinder. Further, as shown in FIG. 2, the slide mechanism 6 can move the control cylinder 5 to a lower position where all the permanent magnets 2 enter the cylinder. As the slide mechanism 6, various known mechanisms can be used as long as the mechanism can move the control cylinder 5. For example, the slide mechanism 6 may be a manual mechanism in which an operator operates a lever and moves the control cylinder 5 up and down by the movement of the lever. It may be a mechanism of the formula.

  Next, operation | movement of the adsorption | suction apparatus 1 is demonstrated.

  When the object to be adsorbed 90 is adsorbed by the adsorption device 1, the slide mechanism 6 is operated to move the control cylinder 5 upward from the permanent magnet 2 as shown in FIG. Thus, in a state where the control cylinder 5 does not surround the permanent magnet 2 (and the attracting portion 3), the magnetic flux passes through the other end of the attracting portion 3, as indicated by a one-dot chain line in FIG. For this reason, the other end of the attracting portion 3 becomes an N pole, and an attracting force for attracting the magnetic material is generated there. Thereby, the other end of the adsorption part 3 adsorbs the object 90 to be adsorbed. In the same figure, the to-be-adsorbed object 90 adsorb | sucked to the adsorption | suction part 3 is shown with the dashed-two dotted line.

  On the other hand, when the suction device 1 releases the suction of the object 90, the slide mechanism 6 is operated to move the control cylinder 5 downward as shown in FIG. When the control cylinder 5 surrounds the entire permanent magnet 2, the magnetic flux returns to the permanent magnet 2 through the wall of the control cylinder 5 as indicated by the alternate long and short dash line in FIG. Almost no magnetic flux passes through the other end. For this reason, the magnetic attraction force hardly occurs at the other end of the attraction portion 3. Accordingly, the adsorption of the object to be adsorbed 90 is released, and the object to be adsorbed 90 is released from the adsorption unit 3.

  As described above, the attracting force that the other end of the attracting part 3 attracts the object to be attracted 90 hardly occurs when the control cylinder 5 surrounds the entire permanent magnet 2 as shown in FIG. When the slide mechanism 6 moves the control cylinder 5 upward from this state, one pole of the permanent magnet 2 comes out from the inside of the control cylinder 5 and the magnetic flux passing through the other end of the attracting portion 3 begins to increase. The suction force generated at the other end of the suction portion 3 gradually increases. As shown in FIG. 1, when one and the other poles of the permanent magnet 2 come out of the control cylinder 5 to the outside, the attracting force becomes the strongest. In this way, the attractive force changes depending on the relative positional relationship between the permanent magnet 2 and the control cylinder 5. In order to increase the attractive force, it is preferable that the slide mechanism 6 moves the control cylinder 5 upward until both poles of the permanent magnet 2 come out of the control cylinder 5. However, if the attractive force is not so much required, at least The control cylinder 5 may be moved within a range in which only one pole of the permanent magnet 2 comes out of the control cylinder 5. That is, the suction force can be controlled by the position where the control cylinder 5 is moved. The attractive force also varies depending on the magnetic strength and shape of the permanent magnet 2, the shape such as the length of the attracting portion 3, and the shape such as the diameter, length, and wall thickness of the control cylinder 5. By appropriately setting the position in consideration of the weight, shape, etc. of the object to be adsorbed 90, it is possible to reliably adsorb the object to be adsorbed 90 and to release the adsorption.

  Here, when the object to be attracted 90 is attracted, the xyz moving mechanism (not shown) is operated in a state where the permanent magnet 2 is surrounded by the control cylinder 5 as shown in FIG. It is preferable that the other end of the object is brought into contact with a desired adsorption position of the object to be adsorbed 90 and then the control cylinder 5 is moved above the permanent magnet 2 as shown in FIG. . When the suction device 1 is operated in this way, the suction portion 3 can be reliably aligned and sucked by the suction portion 3 without deviating from the desired suction position of the object 90 to be sucked.

  Further, when the object to be adsorbed 90 is not adsorbed, it is preferable to set the adsorbed release state as shown in FIG. In this state, since the attracting part 3 does not attract the magnetic material, it is possible to prevent, for example, an iron tool or a screw from being attracted to the attracting part 3 unexpectedly.

  Further, before the adsorption of the object to be adsorbed 90 is released, the object to be adsorbed 90 is fixed in advance to a conveyance destination (for example, a printed wiring board) with an adhesive, a fixing chuck, or the like, and then the control cylinder 5 as shown in FIG. May be moved to release the suction, and then the xyz moving mechanism may be operated so as to move the suction portion 3 away from the object 90 to be sucked. When operated in this way, even when a small adsorption force remains at the other end of the adsorption unit 3 in the released state of adsorption in FIG. 2 when the adsorption unit 3 is moved away from the object to be adsorbed 90, Thus, it is possible to prevent the adsorbing unit 3 from shifting the position by dragging the object to be adsorbed 90 and preventing the adsorbed object 90 from being detached from the adsorbing unit 3.

  In the attracting device 1, the control cylinder 5 is moved with respect to the fixed permanent magnet 2 and the attracting part 3. However, the permanent magnet 2 and the attracting part 3 are slid with the control cylinder 5 fixed. You may make it the structure moved by the mechanism 6. FIG. In short, it is only necessary that the relative positional relationship between the permanent magnet 2 and the control cylinder 5 can be varied.

  Further, the size of the control cylinder 5 may be a size surrounding a part of the permanent magnet 2. For example, even when the axial length of the control cylinder 5 is shorter than the length of the permanent magnet 2, when the permanent magnet 2 passes through the control cylinder 5, the permanent magnet 2 from within the control cylinder 5. The suction force of the suction part 3 is greatly different from the time when the sticking is occurring. Different adsorption forces make it possible to adsorb and desorb the object 90 to be adsorbed.

  1 is a suction device, 2 is a permanent magnet, 3 is a suction section, 4 is a fixed section, 5 is a control cylinder, 6 is a slide mechanism, and 90 is an object to be attracted.

Claims (5)

An adsorption device that adsorbs an object to be adsorbed magnetically,
A permanent magnet for generating the magnetism;
An adsorbing portion made of a magnetic material connected to one pole of the permanent magnet and brought into contact with the object to be adsorbed;
A control cylinder made of a magnetic material surrounding the permanent magnet;
An adsorption device comprising: a moving means for relatively moving the positional relationship between the permanent magnet and the control cylinder.   The adsorption device according to claim 1, wherein the control cylinder is formed in a size capable of accommodating the entire permanent magnet in the cylinder.   The attracting device according to claim 2, wherein the moving means is relatively movable in the positional relationship so that the entire permanent magnet is accommodated in the control cylinder.   4. The moving device according to claim 1, wherein the positional relationship is relatively movable so that the one pole of the permanent magnet enters and exits from the inside of the control cylinder. 5. The adsorption device according to 1.   The said movement means is relatively movable in the said positional relationship so that the other pole of the said permanent magnet may go in and out from the said cylindrical inside, The one in any one of Claim 1 to 4 characterized by the above-mentioned. The adsorption device described.

Images