JP4484498B2 - Electromagnetic crusher and construction machine attachment - Google Patents

Description

  The present invention relates to a crusher with an electromagnet, and more particularly, to a crusher with an electromagnet in which an adsorption surface portion of an electromagnet device can be easily removed and the adsorption surface is easily repaired. The present invention also relates to an attachment for a construction machine that is attached to an attachment portion provided at the tip of a construction machine such as an excavator, a crane, or a wheel loader.

BACKGROUND ART A crusher has been widely used as a device for crushing and breaking a concrete structure. And a crusher is installed in the front-end | tip of the arm provided in the trolley | bogie which can move and turn, and a crusher is moved to the place which crushes a concrete structure, and is used. The crusher has a main body part and a movable part, and can crush the object by meshing the fixed claw of the main body part and the movable claw of the movable part.

  And if a reinforced concrete structure is crushed with a crusher, the crushed material will be a mixture of a concrete part and a reinforcing bar part. In recent years, from the viewpoint of resource reuse and environmental protection, concrete crushing parts and rebar parts are separated and recovered and reused.

  As a method for separating and collecting a reinforcing bar portion from crushed reinforced concrete, for example, a method of adsorbing the reinforcing bar portion by attaching a magnet to the crusher itself is known. For example, Patent Document 1 below describes an electromagnet-equipped crusher having an electromagnet device having an electromagnet and having an attracting surface portion exposed to the outside.

In this crusher, after the reinforced concrete structure is crushed, current is passed through the coil of the electromagnet, so that only the rebar part is adsorbed on the adsorption surface where the magnetic force acts, and the rebar part is separated and collected from the crushed material. Can do. According to this crusher, it is possible to perform crushing of reinforced concrete structures and recovery of rebar parts with a single crusher, and to carry out the recovery work of rebar parts that have been mainly performed manually by machine. Can do. That is, according to this crusher, it is possible to achieve both improvement in work efficiency and safety of workers.
Japanese Patent No. 2563850

  An electromagnet device provided in a conventional crusher has a coil that generates a magnetic field, a case in which the coil enters, and an iron core that is provided on the axis of the coil. The magnetic field generated by the coil transmits the case and the iron core, and the end of the case and the end of the iron core act as magnetic poles to cause the magnetic field to act externally.

  In addition, a gap is provided between the N pole and the S pole, which are magnetic poles, in order to apply a magnetic field to the outside. On the other hand, since the coil is mechanically fragile, it is easy to break if the coil is exposed to the outside. Therefore, a protective member, which is a non-magnetic material, is provided between the magnetic poles in the gap so that the coil is not exposed.

  A coil member provided with a coil is generally provided with plate-like members on both sides of a columnar iron core to form a flange, and a coil wire in which a copper wire, an aluminum wire or the like is wound around the iron core is disposed therebetween. Since this coil wire may be damaged by friction due to vibration during use or the like, the entire space formed by the plate-like member is covered with an adhesive or the like to prevent this damage. It is hardened and protected.

  A surface formed by the magnetic pole and the protective member is called an adsorption surface. This attracting surface is exposed to the outside, and the magnetic material collides with the magnetism of the coil. In addition, when the electromagnet device is attached to the crusher, the attracting surface is in constant contact with concrete and so on. There is a risk of damage. Therefore, the protective member that is a nonmagnetic material is firmly fixed to the magnetic pole by welding or the like.

On the other hand, since the above-described protective member is used as one of the plate-like members used for the coil, the protective member and the coil are connected. Since the coil is wound around the iron core, these are integrated, and the case and the iron core are integrated to transmit a magnetic field.
Therefore, the case, the iron core, the coil, and the protective member of the electromagnet device are all integrated, and the entire structure in which the coil is provided has an integrated hermetic structure.

  As described above, the adsorption surface is exposed to the outside and may be worn out or damaged. However, in the conventional electromagnet device, it is integrated as described above, so only the adsorption surface should be divided and replaced. I could not.

Further, as a method for repairing the suction surface, for example, overlaying by welding is performed. However, this welding operation requires skill and labor. Further, this operation takes a long time, and there is a risk that adjacent coils are damaged by receiving high heat. In particular, since the protective member is bonded to the coil, the coil is immediately damaged when the protective member is repaired.
If the repair cannot be performed, the entire electromagnet device in which the coil, the iron core, the case-like member, and the attracting member are integrated must be replaced.

  Moreover, although the position which attaches an electromagnet apparatus is an exposed part of a crusher, this part is a reinforcement board to which force is added when a crusher is used. If a hole is provided in the reinforcing plate in order to attach the electromagnet device, the strength of the portion is reduced, and reinforcement in other portions is required, resulting in an increase in weight.

  Then, the objective of this invention is providing the crusher with an electromagnet which can repair the adsorption | suction surface of an electromagnet apparatus easily.

The invention according to claim 1 for solving the above-described problem includes a main body portion, a movable portion attached so as to open and close with respect to the main body portion, and an electromagnet device having an electromagnet and an adsorption member. The attracting member is provided with an attracting surface that is a surface having both magnetic poles of the electromagnet and a non-magnetic material between the both magnetic poles, and the attracting surface is attached to be exposed to the outside and is generated by the electromagnet. The magnetic body can be attracted to the attracting surface by the magnetism, and the attracting member is detachably attached to the main body, and is non-magnetic provided between both magnetic poles of the attracting member. The crusher with an electromagnet is characterized in that the body is annular and both magnetic poles are provided inside and outside the annular .

  According to the first aspect of the present invention, since the magnetic material can be adsorbed on the adsorption surface by the magnetism generated by the electromagnet, the iron scrap generated when the concrete structure is dismantled is adsorbed to the concrete scrap. Can be separated. Moreover, since the said adsorption | suction member can be attached or detached to a main-body part, repair can be easily performed by replacing | exchanging this member.

  According to a second aspect of the present invention, the electromagnet device includes a coil that can be energized and an iron core that is provided on a shaft of the coil, the iron core being separable, one of which is fixed to the coil and coiled The crusher according to claim 1, wherein the crusher is a member and the other is fixed to the adsorption member.

  According to the second aspect of the present invention, since the electromagnet is a coil that can be energized, the magnetic material can be adsorbed and desorbed with or without energization. Repairing can be facilitated by fixing the part to a member provided with a suction surface.

  According to a third aspect of the present invention, a case portion having a space is provided in the main body portion, the adsorption member can be detachably attached to the case portion, and the space of the case portion can be obtained by attaching the adsorption member to the case portion. The crusher with an electromagnet according to claim 1 or 2, wherein the coil can be disposed in a space of the case portion.

  According to invention of Claim 3, it has an adsorption member which can be attached to a case part so that attachment or detachment is possible, and since the above-mentioned coil is arranged in this space, when an adsorption surface is damaged, etc. It can be exchanged, and corrosion of the coil can be reduced.

As a non-magnetic material ring provided between the magnetic poles of said suction member, Ru can both poles provided on the inside and outside of the annular.

According to a fourth aspect of the present invention, the edge of the attracting member is made of a magnetic material and is separated from the iron core of the attracting member by a non-magnetic material, and the case portion is made of a magnetic material and contacts the iron core. cage, claim 1, wherein the edges of the suction member attached to the suction member to the case member in contact with the edge of the case member, it is possible to induce the magnetic core to the edge of the suction member The crusher with an electromagnet according to any one of the above.

According to the fourth aspect of the present invention, the edge of the magnetic attracting member is partitioned by the iron core and the non-magnetic material, and the magnetic case member comes into contact with the iron core so as to absorb the magnetism of the iron core. Since the edge of the attracting member and the iron core are both poles of the magnet and are located on the attracting surface side, the magnetic force in the vicinity of the attracting surface is large, and the attracting force of the magnetic material can be increased.

In the invention according to claim 5 , when the coil member is attached, the case portion and the iron core of the coil member are in contact with each other, and when the adsorption member is attached, the iron core of the adsorption member and the iron core of the coil are in contact with each other. It is a crusher with an electromagnet of Claim 3 or 4 characterized by these.

According to the fifth aspect of the present invention, the contact between the case portion and the iron core formed by the coil and the suction member can be ensured, and the suction to the suction surface can be stabilized.

The invention according to claim 6 is provided with a main body part, a movable part attached so as to open and close with respect to the main body part, and an electromagnet device having an electromagnet and an adsorption member. An attracting surface, which is a surface having both magnetic poles of an electromagnet and a nonmagnetic material between the two magnetic poles, is provided, and the attracting surface is attached to be exposed to the outside, and the magnetic material is attracted by the magnetism generated by the electromagnet. It can be adsorbed on the surface, and the adsorbing member is detachably attached to the main body,
The electromagnet device includes a coil that can be energized and an iron core that is provided on the shaft of the coil. The iron core can be divided, and one is fixed to the coil to become a coil member, and the other is attached to the attracting member. Fixed,
The coil member has a first plate-like portion and a second plate-like portion, the first plate-like portion is a non-magnetic body and a plate-like body, and the second plate-like portion is a plate-like body. The first plate-like portion and the second plate-like portion are arranged on both sides of the iron core in the axial direction, and a coil is arranged between the first plate-like portion and the second plate-like portion, further, as the first plate member comprising a suction member, which is to that electromagnets with crusher, characterized in that to attach the coil member to the body member.

According to invention of Claim 6 , since the coil of a coil member is arrange | positioned between the 1st plate-shaped part which is a nonmagnetic material, and the 2nd plate-shaped part, formation of a coil is easy. is there. In addition, since the coil member is attached to the main body member so that the first plate-like portion is on the attracting member side, a magnetic field is induced by the first plate-like portion so as to connect both magnetic poles of the attracting surface during use. There is no risk of weakening the adsorption power.

Furthermore, the present invention can be applied to a construction machine attachment that is attached to a mounting portion of a construction machine having a mounting portion that can be moved (claims 7 and 8 ).

  ADVANTAGE OF THE INVENTION According to this invention, the adsorption surface of the electromagnet apparatus provided in a crusher can be repaired easily.

  The best mode for carrying out the present invention will be described below with reference to the drawings. FIG. 1 is a front view in which a part of a crusher according to a first embodiment of the present invention is cut away. FIG. 2 is a perspective view showing the electromagnet device of the crusher according to the first embodiment of the present invention. FIG. 3 is an exploded perspective view showing the electromagnet device of the present invention. FIG. 4 is a cross-sectional view showing the electromagnet device of the present invention.

As shown in FIG. 1, the crusher 1 according to the first embodiment of the present invention includes a main body portion 10 and a movable portion 12 attached so as to open and close the main body portion 10. Yes.
And the crusher 1 is attached and used for the attachment part of the front-end | tip of the arm of the construction machine which is not shown in figure. Specifically, two shafts (not shown) provided in the arm are inserted into the connection holes 15 and 15 of the main body 10 and are rotatably connected to the connection holes 15 and 15. . Note that the arm of the construction machine can be moved, and the crusher 1 can be operated to a predetermined position.

  The movable portion 12 is connected to be rotatable about the main body portion 10 and the shaft portion 20 as a rotation axis. Then, by operating the cylinder 18, the movable part 12 can be opened and closed with respect to the main body part 10. A specific opening / closing operation will be described. The cylinder 18 is installed so as to connect the main body portion 10 and the shaft portion 21 provided in the movable portion 12, and the movable portion 12 can be expanded and contracted by expanding and contracting the cylinder 18. 10 is opened and closed. When the movable portion 12 is closed, the fixed claw 11 provided on the main body portion 10 side and the movable claw 16 provided on the movable portion 12 side mesh with each other to crush concrete or the like.

Further, as shown in FIG. 3, a case portion 32 is provided in the main body portion 10. The case portion 32 has a container shape and includes a bottom surface portion 54 and a side wall portion 55. And it has the space 46 enclosed by the bottom face part 54 and the side wall part 55, and the opening part 47 formed of the edge of the side wall part 55. As shown in FIG. The opening 47 opens outward.
The space 46 of the case portion 32 has a height substantially equal to the thickness of the coil member 31 and a length and width substantially equal to the size of the adsorption member 30. Then, as will be described later, the space 46 is hermetically sealed by attaching the suction member 30 to the opening 47 of the case portion 32.

  The position of the case portion 32 is outside the main body portion 10, and is provided on the reinforcing plate 26 that connects the side surfaces 25 on both sides of the main body portion 10. The case portion 32 is located on the side opposite to the movable claw 16 with respect to the fixed claw 11. The bottom surface portion 54 of the case portion 32 also has a function as the reinforcing plate 26. Therefore, conventionally, since the member for protecting the coil member 31 and the member for reinforcing the crusher 1 can be performed by using the same member, the weight can be reduced. Can do.

  Further, as shown in FIGS. 2 and 3, the crusher 1 is provided with an adsorption member 30 and a coil member 31, and the electromagnet device is formed by the adsorption member 30, the coil member 31, and the case portion 32 of the main body 10. 13 is formed.

  The adsorbing member 30 has a rectangular plate shape and is approximately the same size as the opening 47 of the case portion 32. And the edge part 40, the center part 41, and the cyclic | annular part 42 are provided in the adsorption | suction surface 35 side which is a surface of the front side. The edge portion 40 is provided so as to connect the edges of the four sides of the adsorption member 30. The central portion 41 has an elliptical shape or an oval shape and is provided near the center of the suction member 30. The annular portion 42 is located outside the central portion 41 and between the inside of the edge portion 40, and partitions the central portion 41 and the edge portion 40 in an annular shape. The edge portion 40 and the central portion 41 protrude from the annular portion 42, and the annular portion 42 is recessed from the edge portion 40 and the central portion 41.

  When the suction member 30 is attached, the suction surface 35 is exposed to the outside as shown in FIG. 2, and the space of the case portion 32 is sealed. The edge portion 40 and the central portion 41 of the attracting member 30 are made of a magnetic material that induces magnetism, and specifically, an iron-based material is used. The annular portion 42 is made of a material that does not induce magnetism, and specifically, stainless steel is used.

  And if the electromagnet apparatus 13 is used, the edge part 40 and the center part 41 of the adsorption | suction member 30 will become both magnetic poles, and can adsorb | suck a magnetic body.

As shown in FIG. 3, the coil member 31 has an elliptical shape or an oval shape, and includes a coil 43 and a core portion 45. The coil 43 is an electromagnet in which an electric wire is wound around the outer side of the core part 45 and serves as a magnetism generating part, and generates magnetism by electricity supplied from the outside. The core part 45 is provided inside the coil 43, and a magnetic body that induces magnetism is used.
The coil 43 and the core part 45 are fixed and integrated.

  The coil member 31 is provided with a first plate-like portion 60 and a second plate-like portion 61 that are plate-like bodies. The first plate-like portion 60 is a non-magnetic material, and the second plate-like portion 61 is a magnetic material. The first plate-like part 60 and the second plate-like part 61 are arranged on both sides in the axial direction of the core part 45, and the coil 43 is arranged between the first plate-like part 60 and the second plate-like part 61. ing. When the coil member 31 is attached, the first plate-like member 60 is on the suction member 30 side.

  The first plate member 60 is disposed on the adsorption member 30 side. However, since the first plate member 60 is a non-magnetic material, a magnetic field is induced between the edge portion 40 and the central portion 41 of the adsorption member 30. And the adsorption power is not reduced.

  The coil 43 is manufactured by being wound around the core portion 45. Specifically, after the first plate-like portion 60 is attached to the core portion 45, a coil wire is wound around the coil 43, and the second plate-like portion 61 is attached. The coil 43 is disposed in a space between the first plate portion 60 and the second plate portion 61. After the coil 43 is wound, the space is filled with an adhesive and the whole is adhered, so that the coil 43 can be prevented from being damaged by vibration during use.

  The adsorption member 30 and the coil member 31 can be detachably attached to the case portion 32, respectively. This attachment / detachment is performed as follows.

  A through hole 40 a is provided in the edge portion 40 of the adsorption member 30, and a through hole 41 a is provided in the central portion 41. The case portion 32 is provided with a screw hole 32a and a through hole 32b. The core portion 45 of the coil member 31 is provided with a screw hole 45a corresponding to the through hole 41a on the suction member 30 side, and a screw hole 45b corresponding to the through hole 32b is provided on the bottom surface portion 54 side of the case portion 32. It has been. The screw hole 45a and the screw hole 45b communicate with each other.

  In order to attach the coil member 31 to the case portion 32, the coil member 31 is arranged in the space 46 of the case portion 32, and a bolt (not shown) is inserted into the through hole 32 b of the case portion 32 from the back side of the case portion 32. This is performed by fastening to the screw hole 45b of the member 31. Further, the attachment of the adsorption member 30 is performed using the bolts 50 and 51 as shown in FIG. The bolt 50 is inserted into the through hole 40a of the suction member 30 and fastened by the screw hole 32a. The bolt 51 is inserted into the through hole 41 a of the suction member 30 and fastened by the screw hole 45 a of the coil member 31.

  As described above, when the adsorption member 30, the coil member 31, and the case portion 32 are attached, the state shown in FIG. 4 is obtained. The central portion 41 of the adsorption member 30 is in contact with the core portion 45 of the coil member 31 on the back surface, and the edge portion 40 of the adsorption member 30 is in contact with the side wall portion 55 of the case portion 32. The coil member 31 is in contact with the bottom surface portion 54 of the case portion 32 on the back surface.

Then, when a current is passed through the coil 43, magnetism is generated. At this time, the direction of the lines of magnetic force in the core portion 45 inside the coil 43 is a direction parallel to the axis of the coil 43, and the front and back directions of the attracting member 30. is there.
The core 45 is in contact with the central portion 41 of the adsorption member 30. The core portion 45 and the central portion 41 function as the iron core 59 of the coil 43. In other words, the iron core 59 of the coil 43 can be divided into the core portion 45 and the central portion 41.

  Further, since the core portion 45 of the coil member 31 is also in contact with the case portion 32, the above-described magnetism is induced as shown by the dotted line in FIG. 4, and one reaches the central portion 41 of the attracting member 30, and the other From the bottom surface portion 54 of the case portion 32 to the edge portion 40 of the adsorption member 30 through the side wall portion 55. Accordingly, the central portion 41 and the edge portion 40 of the adsorption member 30 are opposite to each other in the S pole and the N pole. In addition, since the annular part 42 which is not a magnetic body is provided between the center part 41 and the edge part 40 of the adsorption | suction member 30, magnetism is not induced | guided | derived.

  A magnetic material that is a material attracted by a magnetic force, such as a reinforcing bar, is attracted by a magnetic force, but is attracted by a particularly large force when it comes into contact with both poles of the S pole and the N pole. Therefore, in the electromagnet device 13 of the present embodiment, a force that attracts the magnetic body so as to contact both sides of the central portion 41 and the edge portion 40 of the attracting member 30 works, in other words, the magnetic material is attracted to the attracting surface 35 side of the attracting member 30. Power to suck the body works.

Next, the usage method of the crusher 1 in the present embodiment will be described taking as an example the case of crushing a reinforced concrete structure.
First, the crusher 1 is attached and fixed to the tip of an arm of a construction machine (not shown), and the crusher 1 moves so that the reinforced concrete structure is between the fixed claw 11 and the movable claw 16. And as above-mentioned, it opens and closes by the cylinder 18, and a reinforced concrete structure is crushed.

  When a reinforced concrete structure is crushed, concrete scraps and iron scraps are generated. From this, only iron scraps are separated. Specifically, a current is passed through the coil 43, which is a magnetism generator, by a predetermined operation. If it does so, the force which attracts | sucks a magnetic body will act on the edge part 40 and the center part 41 by the side of the adsorption | suction surface 30 of the adsorption | suction member 30, and the iron scrap which is a magnetic body will be attracted, and an iron is operated and iron scrap and concrete in this state Sort the trash.

  Moreover, in the crusher 1 of this embodiment, replacement | exchange is easy also when the adsorption | suction surface 35 of the adsorption | suction member 30 is worn out or damaged. That is, since the adsorption member 30 is only fastened by the bolts 50 and 51 and the like, the adsorption member 30 can be easily removed and can be repaired only by exchanging with a new adsorption member 30.

  Furthermore, the coil member 31 can be replaced. That is, since the coil member 31 is also fixed only by a bolt (not shown), it can be replaced. Therefore, it is possible to easily change the suction force by exchanging the coil member 31 with a coil whose number of turns is changed.

  In the said embodiment, although used for the crusher 1, it can be used as an attachment of construction machines, such as an excavator, a crane, and a wheel loader.

It is the front view which notched some crushers of the 1st Embodiment of this invention. It is the perspective view which showed the electromagnet apparatus of the crusher of the 1st Embodiment of this invention. It is the disassembled perspective view which showed the electromagnet apparatus of this invention. It is sectional drawing which showed the electromagnet apparatus of this invention.

DESCRIPTION OF SYMBOLS 1 Crusher 10 Main-body part 12 Movable part 13 Electromagnet apparatus 30 Adsorption member 31 Coil member 32 Case part 35 Adsorption surface 40 Edge part 43 Coil 46 Space 59 Iron core

Claims (8)

A main body part, a movable part attached so as to open and close with respect to the main body part, and an electromagnet device having an electromagnet and an attracting member are provided. An adsorption surface, which is a surface having a non-magnetic material in between, is provided so that the adsorption surface is exposed to the outside, and the magnetic material can be adsorbed to the adsorption surface by magnetism generated by an electromagnet. In addition, the attracting member is detachably attached to the main body, and the nonmagnetic material provided between the magnetic poles of the attracting member is annular, and both the magnetic poles are located inside and outside the annular shape. The crusher with an electromagnet characterized by being provided . The electromagnet device includes a coil that can be energized and an iron core that is provided on the shaft of the coil. The iron core can be divided, and one is fixed to the coil to become a coil member, and the other is attached to the attracting member. The crusher with an electromagnet according to claim 1, wherein the crusher is fixed. A case portion having a space is provided in the main body portion, the adsorption member can be detachably attached to the case portion, and the space of the case portion can be closed by attaching the adsorption member to the case portion, The crusher with an electromagnet according to claim 1 or 2, wherein the coil can be disposed in a space of the case portion. The edge of the attracting member is made of a magnetic material and is separated from the iron core of the attracting member by a non-magnetic material. The case portion is made of a magnetic material and is in contact with the iron core, and the attracting member is attached to the case member. 4. The crushing with an electromagnet according to claim 1, wherein the edge of the attracting member contacts the edge of the case member to induce the magnetism of the iron core to the edge of the attracting member. Machine. When the coil member is attached in a state in which the core of the case portion and the coil member are in contact, according to claim 3 or, characterized in that a state in which the core and is in contact of the iron core and the coil of the suction member and the suction member is attached 4. A crusher with an electromagnet according to 4 . A main body part, a movable part attached so as to open and close with respect to the main body part, and an electromagnet device having an electromagnet and an attracting member are provided. An adsorption surface, which is a surface having a non-magnetic material in between, is provided so that the adsorption surface is exposed to the outside, and the magnetic material can be adsorbed to the adsorption surface by magnetism generated by an electromagnet. In addition, the adsorption member is detachably attached to the main body,
The electromagnet device includes a coil that can be energized and an iron core that is provided on the shaft of the coil. The iron core can be divided, and one is fixed to the coil to become a coil member, and the other is attached to the attracting member. Fixed,
The coil member has a first plate-like portion and a second plate-like portion, the first plate-like portion is a non-magnetic body and a plate-like body, and the second plate-like portion is a plate-like body. The first plate-like portion and the second plate-like portion are arranged on both sides of the iron core in the axial direction, and a coil is arranged between the first plate-like portion and the second plate-like portion, further, as the first plate member comprising a suction member side, to that electrostatic crusher with magnets, characterized in that to attach the coil member to the body member. A construction machine attachment having a mounting portion capable of moving operation, and an attachment for a construction machine attached to the mounting portion, the electromagnet device having an electromagnet and an attracting surface exposed to the outside, are those by magnetism generated by the electromagnet can be adsorbed magnetic to the suction surface, further member to which the suction surface is provided Ri der can detachably mounted,
The attachment for a construction machine, wherein the non-magnetic material provided between both magnetic poles of the member provided with the attracting surface is annular, and both magnetic poles are provided inside and outside the annular. . A construction machine attachment having a mounting portion capable of moving operation, and an attachment for a construction machine attached to the mounting portion, the electromagnet device having an electromagnet and an attracting surface exposed to the outside, are those by magnetism generated by the electromagnet can be adsorbed magnetic to the suction surface, further member to which the suction surface is provided Ri der can detachably mounted,
The electromagnet device includes a coil that can be energized and an iron core that is provided on the shaft of the coil. The iron core can be divided, and one is fixed to the coil to become a coil member, and the other is attached to the attracting member. Fixed,
The coil member has a first plate-like portion and a second plate-like portion, the first plate-like portion is a non-magnetic body and a plate-like body, and the second plate-like portion is a plate-like body. The first plate-like portion and the second plate-like portion are arranged on both sides of the iron core in the axial direction, and a coil is arranged between the first plate-like portion and the second plate-like portion, Further, the attachment for a construction machine is characterized in that the coil member is attached to the main body member so that the first plate-like member is on the adsorption member side .

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