JP2009249165A - Attraction work device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To dispense with special consideration to the replacement of a magnet and a power supply wire to the magnet, by avoiding damage of the magnet as an attraction part, when attracting materials. <P>SOLUTION: In the magnet 18 of a power supply work device 11, a part of a lower surface, a side surface and an upper surface is covered with a cover 21, and the under surface of the cover 21 is formed as a cover attraction surface 22d. A gear part 23a is arranged on its inner surface in a cover sub-body part 23 for covering a part of the upper surface of the magnet 18 in the cover 21, and a motor 24 having a rotary gear 26 meshing with the gear part is arranged. When rotating the motor 24, the cover 21 rotates at a predetermined angle around the axis of the magnet 18 to the magnet 18 by the rotary gear 26 and the gear part 23a. Thus, even if an abrasion part by adsorbing work is caused on the cover attraction surface 22d, a position of the abrasion part can be changed to a position of not attracting the materials. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a work machine such as a construction machine, and more particularly, to a suction work device that is provided at a front end portion of a front attachment and sucks materials.

  Conventionally, in work machines such as construction machines, a front attachment including a boom and an arm is provided on the main body of the work machine in which an upper swing body is rotatably mounted on a lower traveling body, and a steel carrier is provided on a transport vehicle such as a trailer. When carrying out the work of loading and unloading materials (hereinafter referred to as adsorption work), an adsorption work device is attached to the tip of the arm of the front attachment so that the work of adsorbing such materials can be performed. Yes.

  In such a suction work device, a bracket attached to the tip of the front attachment is provided with a disk-shaped electromagnet (magnet) suction part, and power is supplied to this suction part from the upper rotating body of the device body via the front attachment or bracket. Wiring has been made so that the magnet can be powered or stopped by turning the power switch of the suction part on and off in the operator's cab of the upper swing body. It has become. Therefore, when performing the adsorption work of the iron material, the operator turns on the power switch of the adsorption unit so that the material is adsorbed to the adsorption surface on the lower surface of the adsorption unit, and after turning, the material is put in a predetermined place (for example, In the case of releasing to the vehicle or the ground of the transport vehicle, the power source switch of the suction unit is turned off so that the material is separated from the suction surface of the suction unit.

  As an example of such an adsorption work device, conventionally, as an example, a technique has been proposed in which an adsorption portion made of a disk-shaped magnet is rotatable about its central axis (see, for example, Patent Document 1).

  In this prior art, a magnet as an adsorbing part is provided on a bracket on the arm side via a rotary drive part such as a hydraulic motor, and by changing the angle of the magnet, a long material adsorbed to this, that is, magnetic It enables to change the direction of body work.

As another example, similarly to the technique described in Patent Document 1, a magnet is rotatably attached to a bracket on the arm side, and a motor is provided in the bracket of the adsorption work device. A technique is also known in which a magnet as an attracting portion provided on the bracket is rotated (see, for example, Patent Document 2).
Japanese Patent Laid-Open No. 10-194655 JP 10-325157 A

  By the way, in the technologies described in Patent Documents 1 and 2, the material is directly adsorbed by a magnet as an adsorbing part, and the adsorbing operation is performed to release the material to a predetermined place, but the magnet is the same as the iron material. Since the magnet is attracted at such a location, wear occurs at a specific position on the magnet's attracting surface and the attracting surface becomes non-planar, which causes a problem that the attracting force on the attracting surface is reduced.

  In order to prevent the influence of such wear, when wear occurs in a specific portion of such an adsorption surface, as in the inventions described in Patent Documents 1 and 2, when the magnet itself can be rotated, The magnet may be rotated by a predetermined angle around its central axis so that the worn part of the attracting surface does not hit the material. When a state where a worn part is generated is generated, the magnet must be replaced. However, the attracting portion made of a magnet is very expensive, and it is not preferable to frequently replace it.

  Further, in such a rotation-type adsorption work device, since a power supply line for supplying power to the magnet is wired from the bracket to the magnet that rotates relative thereto, as described in the above-mentioned patent document. In addition, when the magnet itself is rotated with respect to the bracket on the arm side, it is necessary to use an expensive device such as a slip ring so that these power supply lines do not get entangled.

  The object of the present invention is to eliminate such problems and to avoid wear at a specific location of the magnet as an adsorbing portion when adsorbing materials, and to replace expensive magnets such as magnet replacement and slip rings due to wear. An object of the present invention is to provide an adsorption work device that does not require use.

  In order to achieve the above object, the present invention is an adsorption work device that is provided at the front end portion of a front attachment of a work machine and uses a magnet to adsorb a metallic material, and is attached so as to cover the lower surface of the magnet. And a motor that rotates the cover with respect to the magnet, the lower surface of the cover is used as a material adsorption surface, a gear portion is provided on the inner peripheral surface of the upper portion of the cover, and the gear meshes with the gear portion. A gear is provided in the motor, and the cover is rotated relative to the magnet by the rotation of the motor.

  Further, the present invention is an adsorption work device that is provided at the front end portion of the front attachment of a work machine and that adsorbs a metallic material using a magnet, and is attached so as to cover the lower surface of the magnet. Mounting means with multiple bolts that detachably fix the cover to the magnet, the lower surface of the cover is the material adsorption surface, and the cover can be rotated with respect to this magnet with multiple bolts removed It is characterized by that.

  According to the present invention, since the lower surface of the magnet of the adsorption work device is covered with the cover, the lower surface of the cover can be used as the adsorption surface, and the wear portion of the adsorption surface generated by the material adsorption operation is generated in the magnet. Since this cover can be rotated with respect to the magnet, even if a wear part is generated at the peripheral part of the suction surface, the cover is rotated so that the wear part is attracted to the material. It can be displaced from the position, and the influence of the wear part can be avoided, and even if the wear part occurs almost entirely on the periphery of the adsorption surface, it is only necessary to replace the cover, and it is not necessary to replace the expensive magnet Absent.

  Furthermore, since the magnet itself is not rotated, it is not necessary to use expensive equipment such as a slip ring.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a side view showing an example of a working machine using a suction working device according to the present invention, wherein 1 is a lower traveling body, 2a and 2b are wheels, 3a and 3b are outriggers, 4 is an upper turning body, Swivel device, 6 is a cab, 7 is a link mechanism, 8 is a front attachment, 9 is a boom, 10 is an arm, 11 is an adsorption work device, 12, 13, 14a and 14b are pins, 15 is an arm cylinder, and 16 is an adsorption The work device cylinder 16a is a link mechanism.

  In the figure, an upper swing body 4 is mounted via a swing device 5 on a lower travel body 1 that travels in the front-rear direction by rotating and driving wheels 2a and 2b, and the travel direction can be changed. The main body of the apparatus is configured. The upper turning body 4 can be rotated 360 ° with respect to the lower traveling body 1 by the turning device 5, thereby changing the direction.

  The upper swing body 4 is provided with a driver's cab 6, a link mechanism 7 for lifting the driver's cab 6, a front attachment 8, and the like. Are collectively referred to as operation means in the cab 6), and the operator operates the predetermined operation means in the cab 6 to allow the lower traveling body 1 and the upper swing body 4 to turn, The link mechanism 7 and the front attachment 8 can be operated.

  The front attachment 8 includes a boom 9 attached to the upper swing body 4 by a pin 12 so as to be pivotable up and down, an arm 10 attached to be pivotable in a vertical direction by a pin 13 at the tip of the boom 9, an arm A suction work device 11 having a magnet according to the present invention, which is attached to a tip portion of 10 so as to be pivotable in the vertical direction by a pin 14a. A link mechanism 16a is rotatably attached to the tip of the suction work device cylinder 16 attached to the arm 10, and one end of the link mechanism 16a is turned to the suction work device 11 by a pin 14b. The other tip of the link mechanism 16a is rotatably attached to the tip of the arm 10 by a pin 10a, so that the rod tip of the suction working device cylinder 16 is connected to the arm 10 via the link mechanism 16a. It is connected to the tip portion and the suction working device 11.

  Then, by a predetermined operation of the operator in the cab 6, a boom cylinder (not shown) is operated, the boom 9 is pivoted up and down around the pin 12, the arm cylinder 15 is operated, and the arm 10 is moved to the boom 9. On the other hand, the suction working device cylinder 16 is rotated up and down around the pin 13, and the suction working device 11 is turned up and down around the pin 14 with respect to the arm 10.

  Further, when an operator operates a predetermined operation means in the cab 6, the link mechanism 7 operates and the cab 6 moves up and down.

  Outriggers 3a and 3b are provided at the four corners of the lower traveling body (only two are shown), and when performing work, the entire work machine is supported by the outriggers 3a and 3b with respect to the ground. I am doing so.

  When a metallic material (not shown) is transferred by such a work machine, the lower traveling body 1 is fixed at the work site by the outriggers 3a and 3b, and the cab 6 is lowered or raised to be predetermined. The power is supplied to the adsorption work device 11 to activate the magnet. In this state, by operating the front attachment 8, the suction work device 11 is brought close to a material (not shown) from above, and this material is sucked onto the suction surface of the magnet of the suction work device 11. And by operating the front attachment 8 in this adsorption | suction state, this material is lifted, the upper turning body 4 is turned, and it transfers to a predetermined place. When the material is placed in the predetermined place, power supply to the adsorption work device 11 is stopped, the magnet is deactivated, and the material is released.

  FIG. 2 is a longitudinal sectional view showing a first embodiment of the suction working device 11 according to the present invention, in which 17 is a bracket, 18 is a magnet, 19 is a case, 19a is a through hole, 20 is a coil, 21 is a cover, 22 is a cover main body part, 22a is a cover bottom part, 22b is a cover side wall part, 22c is a cover core part, 22d is a cover adsorption surface, 23 is a cover sub part, 23a is a gear part, 24 is a motor, 25 is a rotating shaft, Reference numeral 26 denotes a rotating gear, and parts corresponding to those in FIG.

  3 is a bottom view showing a specific example of the suction surface 22d of the cover 21 in FIG. 2, wherein 27 is a rib, and the same reference numerals are given to portions corresponding to those in FIG. To do.

  In the drawing, the adsorption work device 11 has a structure in which a magnet 18 is fixed to a bracket 17 and a cover 21 is provided so as to cover the outside of the magnet 18. 10 (FIG. 1) is rotatably attached to one end of a link mechanism 16a (FIG. 1) rotatably attached to the tip of the rod of the adsorption work device cylinder 16 by a pin 14b. It is mounted movably. Here, the magnet 18 has a configuration in which a coil 20 is built in a disc-like case 19 fixed to the bracket 17, and a through hole 19 a is provided in the center portion thereof. Here, although not shown, a power supply line is provided from the cab 6 of the upper swing body 4 shown in FIG. 1 to the suction work device 11 via the front attachment 8, and this power supply line is connected to the coil 20 of the magnet 18. ing.

  The cover 21 includes, for example, a bottomed cylindrical cover main body portion 22 made of iron and a ring-shaped cover sub-body portion 23 placed on the upper end portion of the cover main body portion 22. The cover 18 covers the lower surface, side surface, and peripheral portion of the upper surface of the magnet 18 by superimposing a ring-shaped cover sub-body portion 23 on the upper end surface of the side wall portion 22b of the cover main body portion 22. become. The cover main body portion 22 and the cover sub-body portion 23 are detachably fixed by bolts (not shown).

  Here, a protruding core portion 22 c is formed at the center of the inner surface of the bottom portion 22 a of the cover main body portion 22, and this core portion 22 c is inserted into a through hole 19 a provided in the center portion of the magnet 18. Yes. As a result, the cover 21 attached to the magnet 18 so as to cover the magnet 18 is attached to be rotatable about the core portion 22c as described above. Thereby, the play with respect to the magnet 18 of the cover 21 can be prevented.

  Further, the outer surface of the bottom portion 22a of the cover main body 22 (that is, the lower surface of the cover 21) forms an adsorption surface 22d on which materials (not shown) are adsorbed. The suction surface 22d is provided with a non-slip stopper having an uneven shape. As such a slip stopper, for example, as shown in FIG. 3, it can be configured by a plurality of ribs 27 formed radially from the center thereof.

  On the inner wall surface of the cover sub-body portion 23, for example, a gear portion 23a is formed over almost 360 degrees. The bracket 17 is provided with a motor mounting portion (not shown), and the motor 24 is mounted on the motor mounting portion with the rotating shaft 25 facing downward, that is, toward the magnet 18 side. A rotating gear 26 is attached to the tip of the rotating shaft 25, and the rotating gear 26 is engaged with a gear portion 23 a provided on the inner side surface of the cover sub-body portion 23.

  Although not shown, the motor 24 is wired from the cab 6 of the upper swing body 4 shown in FIG. 1 via the front attachment 8, and the motor 24 is operated by a predetermined operation of the operator in the cab 6. It can be rotated or stopped. When the motor 24 rotates, the rotating gear 26 rotates with the rotation of the rotating shaft 25, whereby the entire cover 21 rotates around the core portion 22c via the gear portion 23a with which the rotating gear 26 is engaged. To do.

  Here, although not shown, a buffer member is provided on the inner surface of the bottom portion 22a of the cover main body portion 22, whereby a gap is provided between the inner surface of the bottom portion 22a and the case 19 of the magnet 18, These are not directly hit.

  With this configuration of the first embodiment, when a suction operation is performed, the outer surface of the cover bottom portion 22a of the cover 21 serves as a cover suction surface 22d to suck materials. Therefore, when the cover adsorbing surface 22d adsorbs the iron material at the same place, the portion of the cover adsorbing surface 22d is worn, and the cover adsorbing surface 22d becomes non-planar and the cover adsorbing surface 22d is adsorbed. Power is reduced.

  However, in the first embodiment, a wear portion is generated on the cover 21 covering the magnet 18, and the wear portion is not generated on the magnet 18. Further, when a wear portion is generated on the cover adsorption surface 22d of the cover 21, the motor 24 is started and the cover 21 is rotated by a predetermined angle about the cover core portion 22c, whereby the cover adsorption surface 22d of the material is used. Thus, the wear portion generated on the cover suction surface 22d can be prevented from hitting the material.

  In this way, the magnet 18 can be protected when the material is attracted, and even if a wear portion is generated on the cover attracting surface 22d of the cover 21, a state in which the material can be attracted easily without being affected by the wear portion is easily maintained. It is something that can be done.

  In addition, when a wear part is generated on the cover adsorption surface 22d of the cover 21 and the influence of the wear part is unavoidable in the material adsorption operation, the cover 21 may be replaced. In the case of replacement, the motor 24 provided with the rotating gear 26 is removed, the cover main body portion 22 and the cover sub-body portion 23 of the cover 21 are separated, each is removed from the magnet 8, and a new cover 21 is attached. You can do it. As described above, in the first embodiment, when the influence of the worn portion becomes unavoidable, the cover 21 which is sufficiently cheaper than the magnet 18 may be replaced, and the replacement can be easily performed. be able to.

  Further, since the magnet 18 is not rotated, there is no problem that the power supply line wired from the bracket 17 to the magnet 18 is entangled. Therefore, an expensive slip ring or the like for preventing the power supply line from being entangled. There is no need to use equipment.

  In the first embodiment, the direction of the adsorbed material can be changed according to the convenience of work by rotating the cover 21 with the motor 24 while adsorbing the material.

  FIG. 4 is a longitudinal sectional view showing a second embodiment of the suction working device according to the present invention, in which 28 is a bolt, and parts corresponding to those in FIG.

  5 is a top view showing the state of attachment of the cover 21 to the magnet 18 in FIG. 4. 29 is a bolt, the same reference numerals are given to portions corresponding to those in FIG. .

  4, in the second embodiment as well, as in the first embodiment shown in FIG. 2, the cover 21 includes a cover main body portion 22 and a cover sub-body portion 23, which are shown in FIG. In addition, the cover 21 is formed by being integrated by a plurality of (here, eight) bolts 29.

  The cover main body portion 22 is attached from the lower surface side of the magnet 18 and is fixed to the cover sub-body portion 23 by the bolt 29, so that the cover 21 is attached to the suction work device 11 in a state of covering the magnet 18.

  In FIG. 4, the cover 21 is attached to the magnet 18 by fixing the cover sub-body portion 23 to the magnet 18 with a bolt 28.

  Here, as shown in FIG. 5, a plurality of bolt holes are provided in the cover sub-body portion 23 at equal intervals around the center of the cover sub-body portion 23. Opposing screw holes (not shown) are provided on the upper surface of the case 19 (FIG. 4) of the magnet 8. Each bolt hole of the cover sub-body part 23 is aligned with a corresponding screw hole of the magnet 18, and the bolt 28 is inserted from the bolt hole and inserted into the screw hole of the magnet 18. 18 is fixed to the upper surface.

  If all the bolts 28 are removed while the cover 21 shown in FIG. 4 is attached to the suction work device 11, the cover sub-body portion 23 is released from the magnet 18, and the cover 21 is moved away from the magnet 18. , It can turn around its central axis. Then, the bolt hole of the cover sub-body part 23 is made to face a screw hole different from the screw hole that has been opposed so far in the magnet 18, and in this state, the bolt 28 is inserted from the bolt hole to face the magnet 18. By inserting into the screw hole and screwing, the cover sub-body part 23 can be fixed to the upper surface of the magnet 18 again. In this case, the attachment state of the cover 21 to the magnet 18 is shifted to a state rotated by an integral multiple of the interval between the bolt holes.

  Therefore, the material is adsorbed while the cover 21 shown in FIG. 4 is attached to the magnet 18. As a result, a part of the peripheral corner of the adsorbing surface 22d of the cover 21 is crushed, and this corner is formed. When the peripheral portion of the attracting surface 22d with respect to the portion wears, and this causes the material to be attracted, the bolts 28 are removed to release the cover 21 from the magnet 18, and then the cover 21 is attached to the magnet 18. When the cover sub-body portion 23 and the magnet 18 are fixed by the bolt 28 so that the bolt hole of the cover sub-body portion 23 faces a screw hole different from that of the magnet 18 so far, the cover sub-body portion 23 and the magnet 18 are fixed. The wear part in the peripheral part of the suction surface 22d of 21 moves to a different position with respect to the suction work device, and the wear part generated in the peripheral part of the suction surface 22d. It will not affect the future of the adsorption work.

  Thus, in the second embodiment, as in the first embodiment, the wear portion on the cover suction surface generated by the suction work can be obtained by manually rotating the cover 21 without using a motor. The influence of can be eliminated.

  Also in the second embodiment, when a wear part is generated over almost the entire periphery of the cover adsorbing surface 22d of the cover 21, the cover 21 is simply replaced without replacing the expensive magnet 18. Will be enough.

It is a side view which shows an example of the working machine using the adsorption | suction work apparatus by this invention. It is a longitudinal section showing a 1st embodiment of an adsorption work device by the present invention. It is a bottom view which shows a specific example of the adsorption | suction surface of the cover 21 in FIG. It is a longitudinal cross-sectional view which shows 2nd Embodiment of the adsorption | suction work apparatus by this invention. It is a top view which shows the attachment state to the magnet 18 of the cover 21 in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Lower traveling body 4 Upper revolving body 5 Rotating drive body 6 Driver's cab 8 Front attachment 9 Boom 10 Arm 11 Adsorption work device 17 Bracket 18 Magnet 19 Case 19a Through-hole 20 Coil 21 Cover 22 Cover main part 22a Cover bottom part 22b Cover side wall part 22c Cover core portion 22d Cover adsorption surface 23 Cover sub-body portion 23a Gear portion 24 Motor 25 Rotating shaft 26 Rotating gear 27 Rib 28, 29 Bolt

Claims (2)

In the adsorption work device that is provided at the tip of the front attachment of the work machine and adsorbs a metallic material using a magnet,
A cover attached to cover the lower surface of the magnet;
A motor for rotating the cover with respect to the magnet;
The lower surface of the cover is the material adsorption surface,
A gear portion is provided on the inner peripheral surface of the upper portion of the cover, a rotating gear meshing with the gear portion is provided in the motor, and the cover is rotated with respect to the magnet by the rotation of the motor. Work equipment. In the adsorption work device that is provided at the tip of the front attachment of the work machine and adsorbs a metallic material using a magnet,
A cover attached to cover the lower surface of the magnet;
A plurality of bolts for detachably fixing the cover to the magnet; and
The lower surface of the cover is the material adsorption surface,
An adsorption work device, wherein the cover is configured to be rotatable with respect to the magnet with the plurality of bolts removed.

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