JP5340761B2 - Lifting magnet - Google Patents

Description

  The present invention relates to a lifting magnet.

  A lifting magnet is a device for lifting and transporting a steel material or the like by the magnetic force of an electromagnet. As such a lifting magnet, FIG. 3 of Patent Document 1 shows a distribution device in which one surface of a long-section material a having a T-shaped cross section is attracted by an electromagnet 6 and the longitudinal material a is attracted and locked to a hanging tool 5. Is described.

Japanese Patent Laid-Open No. 9-156861

  However, in the conventional lifting magnet, when the thickness of the lifting target member is relatively thin, the attracting force of the electromagnet is saturated and the lifting force sometimes becomes insufficient. As a method for lifting such a member, there is a method of using more electromagnets to expand the excitation area, but there is a problem that the control and adjustment of the electromagnets are complicated. The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a lifting magnet capable of obtaining a larger lifting force without increasing the number of electromagnets.

  A lifting magnet according to the present invention is a lifting magnet for lifting an object, comprising: an electromagnet having an excitation surface; and a magnetic member having an opposing surface opposite to the excitation surface, and the excitation surface urges the object. The magnetic member is attracted while being attracted, and the excitation surface and the facing surface sandwich the object.

  According to the lifting magnet of the present invention, the object is sandwiched between the excitation surface of the electromagnet and the opposing surface of the magnetic member attracted by the excitation surface. When the object is lifted by the clamping operation of the object by the excitation surface and the opposing surface, the frictional force from the excitation surface and the opposing surface acts on the object. Since these frictional forces act on the object in addition to the attracting force by the electromagnet, it is possible to obtain a larger lifting force without increasing the number of electromagnets. Moreover, since the same lifting force can be realized with fewer electromagnets, fine adjustment and control of the electromagnets can be simplified, and the number of parts associated therewith can be reduced.

  The lifting magnet according to the present invention may further include a holding member that holds a predetermined interval between the excitation surface and the facing surface when the excitation surface is not attracting the object. The predetermined interval held by the holding member facilitates the insertion of the object between the excitation surface and the opposing surface, and facilitates the holding of the object having a relatively large thickness.

  Here, the holding member is a member having one end pivotally mounted around an axis perpendicular to a direction in which the object is lifted on a side surface adjacent to the excitation surface of the electromagnet, Comes into contact with the object when inserted between the excitation surface and the opposing surface, and rotates upward as the object is inserted to release the holding at the predetermined interval. It is preferable to hold the predetermined interval by rotating downward by its own weight as it is removed from between the excitation surface and the opposing surface. When the excitation surface attracts the magnetic member, it is necessary to release the holding at a predetermined interval by the holding member. Further, it is preferable to maintain a predetermined interval as described above before inserting the object. The holding member can be rotated by inserting and removing the object, and can automatically perform a holding operation and a releasing operation at predetermined intervals.

  Further, it is preferable that the facing surface of the magnetic member is inclined with respect to the exciting surface when the exciting surface does not attract the object. In this way, when the excitation surface attracts the magnetic member, a larger attractive force acts on one of the upper and lower surfaces of the opposing surface of the magnetic member, so that the magnetic member can be easily attracted to the excitation surface. Is possible.

  In addition, a magnetic member that is attracted to the excitation surface and that is suitable for sandwiching the object together with the excitation surface has an upper portion that is pivotable about an axis perpendicular to a direction in which the object is lifted. It is a plate-shaped member. Further, the magnetic member may be movable in parallel when the excitation surface does not attract the object.

  According to the lifting magnet of the present invention, it is possible to obtain a larger lifting force without increasing the number of electromagnets.

It is a perspective view which shows the lifting magnet which concerns on this embodiment. (A) It is side surface sectional drawing which shows the electromagnet of the lifting magnet shown in FIG. (B) It is sectional drawing which shows the cross section along the bb line of an electromagnet. It is a perspective view which shows the stopper of the lifting magnet shown in FIG. (A) It is a side view which shows the initial stage arrangement | positioning operation | movement of a lifting magnet. (B) It is a side view which shows the insertion operation | movement of the longi material by a lifting magnet. (A) It is a side view which shows the adsorption | suction operation | movement by a lifting magnet. (B) It is a side view which shows the clamping operation | movement of the longi material by a lifting magnet. It is a side view which shows the lifting operation of the long material by a lifting magnet.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In the description of the drawings, the same elements are denoted by the same reference numerals, and redundant description is omitted. For the convenience of illustration, the dimensional ratios in the drawings do not necessarily match those described.

  In the present embodiment, a case where the lifting magnet according to the present invention is applied to a fixed suspension beam that lifts a longi material in the zenith direction will be described.

  First, with reference to FIGS. 1-3, the structure of the lifting magnet concerning 1st embodiment is demonstrated. FIG. 1 is a perspective view showing a lifting magnet according to the present embodiment, FIG. 2A is a side sectional view showing an electromagnet of the lifting magnet, and FIG. 2B is a cross section showing a cross section taken along line bb of the electromagnet. FIG. 3 is a perspective view showing a stopper of the lifting magnet.

  As shown in FIG. 1, the lifting magnet 100 according to the present embodiment includes an electromagnet 130, a contact plate 160, a pair of stoppers 171 and 172, a pair of fixing members 121 and 122, and a pair of locking members 121a. And 122a, a pair of fishing support members 141 and 142, a pair of chain members 151 and 152, a pair of connecting members 161 and 162, and a pair of support members 181 and 182. The pair of components are provided on the front side (the last digit of the reference number is 1) and the rear side (the last digit of the reference number is 2) in FIG. In the following description, only the reference numbers of the elements on the front side are described as representatives.

  The electromagnet 130 is suspended from a lower part of the main beam 110 of the fixed suspension beam via a fixing member 121, and has an excitation surface 130 a along the zenith direction Z. During the operation of the lifting magnet, the excitation surface 130a of the electromagnet forms a magnetic field in a direction substantially normal to the excitation surface 130a, and attracts the contact plate 160 (described later) while adsorbing the longi material.

  For example, as shown in FIGS. 2A and 2B, the electromagnet 130 includes an inner pole 132 extending in a predetermined axial direction Y in the case 131, a coil 134 wound around the inner pole 132, An outer pole 133 provided around the coil 134 and a bottom plate 135 provided on one end side of the coil 134 are provided. The case 131, the inner pole 132, and the outer pole 133 are made of a ferromagnetic material such as iron, and the bottom plate 135 is made of a nonmagnetic material such as high manganese austenitic steel. The coil 134 is a copper wire coated with an insulating coating film, and is fixed to the inner surface of the case 131, the inner pole 132, the outer pole 133, and the bottom plate 135 by a fixing material 136 such as an epoxy resin. The excitation surface 130a is configured to be flush with the end surface 132a of the inner pole, the end surface 133a of the outer pole, and the end surface 135a of the bottom plate. During the operation of the lifting magnet, when a suction button (not shown) is pressed, an exciting current flows through the coil 134, and a magnetic field is generated on the end face 132a of the inner pole and the end face 133a of the outer pole. Here, as shown in FIG. 2B, the area of the excitation surface 130a can be effectively utilized by making the cross-sectional areas of the inner pole 132 and the outer pole 133 normal to the axis Y. it can.

  As shown in FIG. 1, the contact plate 160 is a rectangular plate-like member having a facing surface 160 a that faces the exciting surface 130 a of the electromagnet, and is a member made of a ferromagnetic magnetic material as in the case 131. It is. The facing surface 160a of the contact plate is separated from the exciting surface 131a by a surface interval S when the exciting surface 130a is not adsorbing the longi material, and the upper portion of the facing surface 160a is more excited than the lower portion of the facing surface 160a. It inclines with the predetermined inclination | tilt angle (alpha) with respect to the excitation surface 130a so that it may approach 130a. That is, the surface interval S is reduced on the upper side of the facing surface 160a and increased on the lower side. When the holding of the surface interval S by the stopper 171 (described later) is released during the operation of the lifting magnet, the contact plate 160 is attracted by the magnetic field formed by the excitation surface 130a, and the opposing surface 160a is the long material together with the excitation surface 130a. It is possible to hold the base portion of.

  More specifically, the contact plate 160 is suspended by a fishing support member 141 and a chain member 151 provided at the lower portion of the main girder 110, and the opposing surface 160a is accessible to the excitation surface 130a (that is, The inclination angle α and the surface interval S can be reduced). The upper part of the contact plate 160 is pivotally attached to the chain member 151 via the connecting member 161 so as to be rotatable about an axis line X1 perpendicular to the zenith direction Z and along the facing surface 160a. When the lifting magnet is in operation, the contact plate 160 approaches the excitation surface 130a when the holding of the surface interval S by the stopper 171 (described later) is released when the excitation surface 130a is not adsorbing the longi material. Parallel movement is possible so as to be separated.

  The stopper 171 is a member that plays a role of maintaining a surface interval S between the excitation surface 130a and the opposing surface 160a when the excitation surface 130a is not adsorbing the longi material. More specifically, as shown in FIG. 3, the stopper 171 has one end that is rotatable at a predetermined rotation angle β around the axis line X2 perpendicular to the zenith direction Z on the side surface 130b adjacent to the excitation surface 130a of the electromagnet. Is a rod-shaped member attached to the shaft. The stoppers 171 and 172 may be pivotally attached to independent shaft members, or may be pivotally attached to a common shaft member. During the operation of the lifting magnet, the stopper 171 contacts the longi material when the longi material is inserted between the excitation surface 130a and the opposing surface 160a, and rotates upward as the longi material is inserted. The holding of the interval S is released. Further, as the longi material is pulled out from between the excitation surface 130a and the opposing surface 160a, it is rotated downward by its own weight to maintain the surface interval S.

  More specifically, the stopper 171 has a support surface 171a that supports the opposing surface 160a at the other end, and supports the opposing surface 160a so as to intersect the excitation surface 130a and the opposing surface 160a. Further, the rotation range of the stopper 171 is limited to a predetermined rotation angle β by a locking member 121a and a support member 181 (see FIG. 1) provided on the side surface 130b of the electromagnet. The rotation angle β is an acute angle formed from the vertical direction of the zenith direction Z, that is, from the horizontal direction toward the zenith direction. Thereby, when the longi material inserted in contact with the stopper 171 is removed, the stopper 171 rotates by its own weight, and the stopper supporting surface 171a can be rotated and moved to a position where the opposing surface 160a can be supported. it can. Therefore, when the long material is pulled out between the exciting surface 130a and the opposing surface 160a, the surface interval S can be automatically held by the stopper 171.

  Moreover, the stopper 171 is good to provide the J-shaped member 171c extended in the direction which the stopper rotates in the other end. The J-shaped member 171c prevents the inserted Longe material from being pulled out when the other end of the stopper 171 enters the hole of the Longi material when the Longi material having the hole is inserted.

  Next, the operation of the lifting magnet 100 will be described with reference to FIGS. Here, FIG. 4A is a side view showing the initial placement operation of the lifting magnet, FIG. 4B is a side view showing the insertion operation of the longi material by the lifting magnet, and FIG. 5A is an adsorption operation by the lifting magnet. FIG. 5B is a side view showing the holding operation of the long material by the lifting magnet, and FIG. 6 is a side view showing the lifting operation of the long material by the lifting magnet.

  First, as shown in FIG. 4A, the lifting magnet 100 is horizontally moved so that the base of the longage material W is located immediately below the surface interval S between the excitation surface 130a and the opposing surface 160a.

  Next, as shown in FIG. 4B, an operation of lowering the lifting magnet 100 toward the longage material W is performed. At this time, when the base of the longi material W is inserted between the exciting surface 130a of the electromagnet and the opposing surface 160a of the backing plate, the base of the longi material W comes into contact with the bottom surface of the stopper 171 and the surface distance S of the stopper 171 is increased. Holding is released. More specifically, as the base of the longi material W is inserted, the stopper 171 rotates upward about the axis X2 while being in contact with the base of the longi material W, thereby releasing the support of the facing surface 160a by the support surface 171a. To do. When the holding of the surface interval S by the stopper 171 is released, the opposing surface 160a becomes accessible to the excitation surface 130a (that is, the inclination angle α and the surface interval S can be reduced).

Next, as shown in FIG. 5A, when the base of the longage material W is inserted to a predetermined position, the suction button (not shown) is pressed to excite the electromagnet 130. At this time, the attractive force F _m2u to the upper part of the opposing surface 160a by the exciting surface 130a of the electromagnet acts more than the attractive force F _m2l to the lower part of the opposing surface 160a. Therefore, the upper part of the facing surface 160a is more easily sucked than the lower part.

  Thereafter, as shown in FIG. 5B, the contact plate 160 attracts the exciting surface 130 a while adsorbing the longi material W, and the exciting surface 130 a and the opposing surface 160 a sandwich the base of the longi material W.

Thereafter, as shown in FIG. 6, the lifting magnet 100 is raised and the longage material W is lifted. At this time, the frictional forces F _f1 and F _{f2 in} the zenith direction act on the base of the long material W in addition to the attractive force F _m1 on the excitation surface 130a. Therefore, a more reliable lifting operation of the longage material W is possible.

As described above, according to the lifting magnet of the present embodiment, as shown in FIG. 6, the base portion of the longi material W is formed by the excitation surface 130a of the electromagnet and the opposing surface 160a of the contact plate attracted by the excitation surface 130a. It is pinched. The frictional force F _f1 + F _f2 from the excitation surface 130 a and the opposed surface 160 a acts on the longage material W when the longage material W is lifted by the clamping operation of the longage material W by the excitation surface 130 a and the opposed surface 160 a. Since these frictional forces F _f1 + F _f2 act on the longi material W in addition to the attraction force F _m1 by the electromagnet, it is possible to obtain a large lifting force without increasing the number of electromagnets. Moreover, since the same lifting force can be realized with fewer electromagnets, fine adjustment and control of the electromagnets can be simplified, and the number of parts associated therewith can be reduced.

  In addition, the lifting magnet 100 according to the embodiment further includes a stopper 171 that maintains a surface interval S between the excitation surface 130a and the opposing surface 160a when the excitation surface 130a is not attracting the longi material W. As shown in FIG. 4A, the surface interval S held by the stopper 171 facilitates the insertion of the long material W between the excitation surface 130a and the opposing surface 160a, and the long material W having a relatively large thickness. Makes it easy to hold.

  Here, the stopper 171 is a rod-like member having one end pivotally mounted on the side surface 130b of the electromagnet so as to be rotatable at a rotation angle β around an axis line X2 perpendicular to the zenith direction Z. When it is inserted between 130a and the opposing surface 160a, it abuts on the base of the longi material W, and as the longi material W is inserted, it rotates upward to release the holding of the surface spacing S. As it is withdrawn from between the excitation surface 130a and the opposing surface 160a, it rotates downward by its own weight and maintains a predetermined interval S. When the excitation surface 130a attracts the contact plate 160, it is necessary to release the holding of the surface interval S by the stopper 171. In addition, before inserting the long material W, it is preferable to maintain the surface spacing S as described above. The stopper 171 rotates by inserting and removing the longage material W, and can automatically perform the holding operation and the releasing operation of the surface interval S.

Further, the facing surface 160a of the counter plate is such that when the exciting surface 130a is not attracting the longi material W, the upper portion of the facing surface 160a is closer to the exciting surface 130a of the electromagnet than the lower portion. Is inclined with respect to the excitation surface 130a of the electromagnet. In this way, as shown in FIG. 5A, when the excitation surface 130a _{attracts the contact} plate 160, a larger suction force F _m2u acts on the upper portion of the facing surface 160a of the contact plate. The contact plate 160 can be easily attracted to the excitation surface 130a. In addition, at the lower part of the facing surface 160a, the surface spacing S between the exciting surface 130a and the facing surface 160a can be secured larger, so that the Longi material W can be easily inserted from below the exciting surface 130a and the facing surface 160a. It is possible.

  In addition, the contact plate 160 is a plate-like member that is perpendicular to the zenith direction Z and has an upper portion pivotally mounted about an axis X1 along the opposing surface 160a. Further, the contact plate 160 is movable in parallel so as to approach and separate from the excitation surface 130a when the excitation surface 130a is not attracting the longi material W. Therefore, when attracted to the excitation surface 130a, the base portion of the longage material W can be easily held together with the excitation surface 130a.

  In addition, embodiment mentioned above shows an example of the lifting magnet which concerns on this invention. The lifting magnet according to the present invention is not limited to the above embodiment, and may be a modification of the above embodiment so as not to change the gist of the present invention.

  For example, a frictional force is applied by attaching a rubber material, applying a coating, or roughening the surface of one or both of the excitation surface 130a of the electromagnet and the opposing surface 160a of the backing plate. May be improved.

  Moreover, although the electromagnet which consists of one coil was shown in the above-mentioned embodiment, an electromagnet may consist of a some coil.

  In the above-described embodiment, the stopper, the fixing member, the locking member, the fishing support member, the chain member, the connecting member, and the supporting member are each shown as a pair of members, but each may be a single member.

  In the above-described embodiment, the long material is shown as an example of the object to be lifted. However, it may be a shape in which thin plates are arranged vertically, and may be an L-shaped member, for example.

DESCRIPTION OF SYMBOLS 100 ... Lifting magnet, 110 ... Main girder, 121, 122 ... A pair of fixing member, 121a, 122a ... A pair of locking member, 130 ... Electromagnet, 130a ... Electromagnetic excitation surface, 130b ... Electromagnet side surface, 131 ... Electromagnet Case: 132 ... Inner pole of electromagnet, 133 ... Outer pole of electromagnet, 134 ... Coil of electromagnet, 135 ... Bottom plate of electromagnet, 136 ... Fixing material, 141, 142 ... Pair of fishing support members, 151, 152 ... Pair of chains 160--a contact plate (magnetic member), 160a—a facing surface of the contact plate, 161,162—a connecting member, 171,172—a pair of stoppers, 171a—a stopper support surface, 172b—a stopper contact surface, 171c ... stopper J-shaped member, 181, 182 ... pair of support _members, the frictional force acting on the _F f1, F _{f2 ...} longitudinals material, F _{m1 ...} longitudinals Suction force acting suction force acting on the upper part of the _F m2u _... facing surface, the suction force acting on the lower portion of the F _{M2L ...} facing surface, S ... surface distance (predetermined distance), W ... longitudinals material (object) to, X1: Axis for attaching the contact plate, X2: Axis for attaching the stopper, Y: Electromagnetic axis, Z: Zenith direction, α: Inclination angle, β: Rotation angle.

Claims (6)

A lifting magnet for lifting an object,
An electromagnet having an excitation surface;
A magnetic member having a facing surface facing the excitation surface;
One holding member pivotally mounted on the electromagnet side so that the holding member is interposed between the exciting surface and the facing surface when the exciting surface is not attracting the object. A holding member that holds the predetermined interval and releases the holding of the predetermined interval by rotating the holding member so that the other is separated from the facing surface;
With
The holding member automatically releases the holding at the predetermined interval by inserting the object between the excitation surface and the facing surface, and
A lifting magnet, wherein the excitation surface attracts the object while attracting the magnetic member, and the excitation surface and the facing surface sandwich the object. The holding member is a member in which the one is pivotally mounted around an axis perpendicular to a direction in which the object is lifted on a side surface adjacent to the excitation surface of the electromagnet,
Abutting against the object when the object is inserted between the excitation surface and the facing surface;
As the object is inserted, it rotates upward to release the predetermined interval,
The lifting magnet according to claim 1 , wherein the object is rotated downward by its own weight as the object is pulled from between the excitation surface and the facing surface to hold the predetermined interval.   The lifting magnet according to claim 1, wherein the facing surface is inclined with respect to the excitation surface when the excitation surface does not attract the object. 4. The lifting magnet according to claim 3 , wherein the magnetic member is a plate-like member having an upper part pivotally mounted about an axis perpendicular to a direction in which the object is lifted. 5. The lifting magnet according to claim 4 , wherein the magnetic member is movable in parallel when the excitation surface does not attract the object. The lifting magnet according to any one of claims 1 to 5, wherein the holding member has a member extending in a direction in which the holding member rotates on the other side.

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