JP3196587U - Hydraulic excavator attachment - Google Patents

Abstract

To provide an attachment of a hydraulic excavator that can be attached to an existing hydraulic excavator without changing the hand and can adjust the engagement with a bucket by changing an attachment position to an arm. A claw body 3 disposed opposite to an opening 1a of a bucket 1 so that an object can be sandwiched between the bucket 1 by rotating the bucket 1 and an arm of the claw body 3 And an auxiliary body 4 to be attached to 2. The nail body 3 is attached to the arm 2 by sandwiching the arm 2 between the attachment part 5 and the auxiliary body 4 at the base of the nail body 3 and detachably connecting the attachment part 5 and the auxiliary body 4. Yes. [Selection] Figure 1

Description

  The present invention relates to an attachment of a hydraulic excavator, and more particularly to an attachment that can be given a function of sandwiching an object using a bucket.

  Hydraulic excavators (also called power shovels, yumbos, backhoes, etc.) that play an active role in civil engineering construction sites are often used with hydraulically operated buckets. Conventionally, by attaching an attachment to such a hydraulic excavator, a function suitable for various kinds of work has been provided.

  For example, by attaching a claw-shaped attachment to the arm of a hydraulic excavator equipped with a bucket at a position facing the bucket, the function of sandwiching an object between the hydraulically rotated bucket and the claw-shaped attachment is provided. can do. And as such an attachment, what is conventionally seen by patent documents 1-3 is proposed.

  For example, the attachment proposed in Patent Document 1 is formed of a claw portion 16 and a mounting base 17 as shown in FIG. 4 (a), and is used by being attached to a hydraulic excavator A as shown in FIG. 4 (b). It is what is done. That is, the bucket 1 is attached to the tip of the arm 2 of the excavator A, and the bucket 1 is rotated by the operation of the hydraulic cylinder 18. Then, the mounting base 17 is fixed to the arm 2 in advance at the base of the bucket 1 with welding or bolts, and the base of the claw portion 16 formed hollow inside is fitted into the mounting base 17 to be attached to the claw portion 16. The claw portion 16 is attached to the arm 2 via the mounting base 17 by screwing a bolt into each bolt hole 19 of the base 17 and fixing the claw portion 16 to the mounting base 17.

  When the bucket 1 is rotated by the hydraulic cylinder 18 with the attachment attached to the arm 2 of the excavator A in this way, the bucket 1 moves so as to approach and separate from the claw portion 16 of the attachment. An object can be sandwiched and grasped between the portion 16 and the bucket 1. Moreover, if the nail | claw part 16 is removed from the attachment stand 17 and removed from the arm 2, the bucket 1 can be used for original excavation etc.

Utility Model Registration No. 3021782

Japanese Patent No. 3551866

JP 2004-324182 A

  According to the above-mentioned attachment of Patent Document 1, if the mounting base 17 is fixed to the arm 2 by welding or bolting, the claw portion 16 can be attached to the arm 2 via the mounting base 17, The claw portion 16 can be attached to the existing excavator A without being limited by the model.

  However, when the mounting base 17 is fixed to the arm 2 by welding, once it is welded, it becomes difficult to remove the mounting base 17, and even when the mounting base 17 is bolted and fixed to the arm 2, the arm 2 can be bolted. In any case, since the hydraulic excavator A is modified in any case, there is a problem that it results in scratching. Further, since it is necessary to modify the hydraulic excavator A in this way, the attachment cannot be applied to the hydraulic excavator A rented or the like.

  Moreover, the attachment position of the nail | claw part 16 to the arm 2 is limited to the position of the attachment stand 17 fixed beforehand. For this reason, it is impossible to adjust the engagement between the bucket 1 and the claw portion 16 by changing the attachment position of the claw portion 16 with respect to the bucket 1. The above cited references 2 and 3 also have the same problems.

  The present invention has been made in view of the above points, and can be attached to an existing hydraulic excavator without changing the hand, and can change the attachment position to the arm and adjust the engagement with the bucket. An object of the present invention is to provide an attachment for a hydraulic excavator.

  The attachment of the hydraulic excavator according to the present invention is an attachment that is used by being attached to the arm 2 to which the bucket 1 of the hydraulic excavator A is attached, and is disposed to face the opening 1a of the bucket 1 to rotate the bucket 1. The claw body 3 is configured so that an object can be sandwiched between the bucket 1 and the auxiliary body 4 for attaching the claw body 3 to the arm 2. The nail body 3 is attached to the arm 2 by sandwiching the arm 2 between the portion 5 and the auxiliary body 4 and detachably connecting the attachment portion 5 and the auxiliary body 4. .

  The attachment claw body 3 is attached to the arm 2 by sandwiching the arm 2 between the attachment part 5 of the base and the auxiliary body 4. When attaching the claw body 3 to the arm 2, This eliminates the need for manual processing such as bolt hole machining. Further, by changing the position of the arm 2 sandwiched between the attachment portion 5 of the claw body 3 and the auxiliary body 4, the attachment position of the claw body 3 to the arm 2 is changed, and the attachment position of the claw body 3 with respect to the bucket 1 is changed. By changing, the meshing between the bucket 1 and the claw body 3 can be adjusted. Further, by removing the coupling between the nail body 3 and the auxiliary body 4, the nail body 4 can be removed from the arm 2, and the bucket 1 is originally excavated without the nail body 3 getting in the way. It can be used for such work.

  In the present invention, the bolt 8 is passed between the connecting pieces 6 provided on both sides of the attachment portion 5 of the claw body 3 and the connecting portions 7 formed on both sides of the auxiliary body 4, and the nut 9 is screwed into the bolt 8. The nail body 3 is attached to the arm 2 by tying the arm 2 between the attachment portion 5 and the auxiliary body 4.

  The nail body 3 can be attached to the arm 2 by screwing the nut 9 to the bolt 8, and the nail body 3 can be removed from the arm 2 by removing the nut 9 from the bolt 8. 3 can be easily attached and detached. Although the thickness of the arm 2 varies depending on the type of the hydraulic excavator A, the thickness of the arm 2 can be adjusted by adjusting the distance between the connecting piece 6 of the claw body 3 and the connecting portion 7 of the auxiliary body 4 within the length of the bolt 8. The claw body 3 can be attached without any trouble. Further, by loosening the nut 9 with respect to the bolt 8, the claw body 3 can be slid along the longitudinal direction of the arm 2, and the attachment position can be shifted and changed without having to remove the claw body 3 from the arm 2. Is.

  In the present invention, the connecting piece 6 of the mounting portion 5 of the claw body 3 is inclined so that the vertical distance from the surface contacting the arm 2 of the mounting portion 5 to the connecting piece 6 is shorter on the front side and longer on the base side. It is characterized by having made it.

  The tip portion of the arm 2 of the hydraulic excavator A is generally tapered so that the diameter (thickness) gradually decreases toward the tip, but the connecting pieces 6 provided on both sides of the attachment portion 5 of the claw body 3 are arm 2. The auxiliary body 4 is inclined so as to fit the taper, and the auxiliary body 4 can be coupled with the connecting piece 6 so as to be parallel to each other, and the connecting piece 6 and the auxiliary body 4 are in a stable state. The attachment strength of the claw body 3 with respect to the arm 2 can be increased by coupling with.

  Further, the present invention is characterized in that elastic sheets 10 and 11 are provided on the surface of the claw body 3 that contacts the arm 2 of the attachment portion 5 and the surface of the auxiliary body 4 that contacts the arm 2, respectively.

  The nail body 3 and the auxiliary body 4 are in contact with the arm 2 via the elastic sheets 10 and 11, and the arm 2 can be prevented from being damaged, and the nail body 3 and the auxiliary body 4 slide against the arm 2. It becomes difficult and the nail | claw main body 3 can be attached to the arm 2 stably.

  According to the present invention, the nail body 3 of the attachment can be attached to the arm 2 by sandwiching the arm 2 between the attachment part 5 of the base and the auxiliary body 4. This eliminates the need for the arm 2, such as welding or bolt hole machining. Further, by changing the position where the nail body 3 is sandwiched between the attachment portion 5 and the auxiliary body 4, the attachment position of the nail body 3 to the arm 2 can be changed, and the position of the nail body 3 relative to the bucket 1 can be changed. The engagement between the bucket 1 and the claw body 3 can be adjusted. Further, by removing the coupling between the nail body 3 and the auxiliary body 4, the nail body 4 can be detached from the arm 2, and the bucket 1 is used for original excavation or the like without the nail body 4 getting in the way. It is something that can be done.

An example of embodiment of this invention is shown, (a) And (b) is a perspective view which shows the state with which the arm of the hydraulic shovel was mounted | worn. BRIEF DESCRIPTION OF THE DRAWINGS An example of embodiment of this invention is shown, (a) is a perspective view of a nail | claw main body, (b) is a perspective view in the state which turned the auxiliary body upside down. BRIEF DESCRIPTION OF THE DRAWINGS An example of embodiment of this invention is shown, (a) is a front view of a nail | claw main body, (b) is a top view of a nail | claw main body. It shows a conventional example, (a) is a sectional view of the attachment, (b) is a reduced schematic front view showing a state where it is attached to the arm of a hydraulic excavator.

Embodiments of the present invention will be described below.
The attachment according to the present invention is composed of a nail body 3 and an auxiliary body 4, and the nail body 3 is formed of a front claw part 3 a and a base attachment part 5. The claw portion 3a is formed of a metal material in a U-shaped cross section whose upper surface is open, and the attachment portion 5 is formed in a U-shaped cross section that opens downward. As shown in FIGS. 2 (a) and 3 (a), the claw portion 3a is formed so as to protrude downward from one end of the mounting portion 5 so as to be bent in a fork shape. A plurality of anti-slip bars 22 are attached to the upper surface of the plate. The attachment portion 5 and the claw portion 3a are integrated by welding, and the strength of the claw body 3 is obtained by welding and attaching the reinforcing plate 23 from the front side surface of the attachment portion 5 to the rear side surface of the claw portion 3a. To improve.

  A metal angle member 24 is welded to the upper ends of both side surfaces of the attachment portion 5. Each angle member 24 is attached such that the horizontal piece is on the upper side and projects outward, and the connecting piece 6 is formed by the horizontal piece of the angle member 24. Therefore, the connecting piece 6 is located above the upper surface of the mounting portion 5 and is formed so as to protrude outwardly from the mounting portion 5 in a bowl shape. Further, the angle member 24 is attached to the attachment portion 5 so that the connecting piece 6 is inclined with respect to the upper surface of the attachment portion 5. That is, as shown in FIG. 2 (a), the vertical distance from the upper surface, which is the surface in contact with the arm 2 of the mounting portion 5, to the upper surface of the connecting piece 6 is short on the front side of the connecting piece 6 (L1) and on the base side. The connecting piece 6 is inclined so as to be long (L2). Since the tip portion of the arm 2 of the hydraulic excavator A is generally tapered so as to become thinner toward the tip, the inclination angle of the connecting piece 6 is formed to match the taper of the arm 2. The connecting piece 6 is provided with mounting holes 25 at a plurality of locations (two locations) in the front-rear direction.

  As shown in FIG. 2 (b), the auxiliary body 4 is formed of a metal rectangular plate. Both side portions of the auxiliary body 4 serve as connecting portions 7, and mounting holes 26 are formed in the connecting portions 7 at positions corresponding to the mounting holes 25 of the connecting pieces 6. Further, an elastic sheet 11 is attached to the central portion of the lower surface that comes into contact with the arm 2 of the auxiliary body 4 by adhesion or the like. The elastic sheet 10 is attached to the upper surface that comes into contact with the arm 2 of the attachment portion 5 of the nail body 3 by adhesion or the like. As the elastic sheets 10 and 11, rubber sheets can be used.

  Next, a method for attaching the attachment formed as described above to the arm 2 to which the bucket 1 of the excavator A is attached will be described. The bucket 1 is normally attached to the tip of the arm 2 so that the opening thereof faces downward, and the hydraulic cylinder 18 for rotating the bucket 1 is provided on the upper surface of the arm 2. First, the claw body 3 is disposed below the tip of the arm 2 and the auxiliary body 4 is disposed above the arm 2 so that the arm 2 is fitted between the angle members 24 on both sides of the mounting portion 5 of the claw body 3. The upper surface of the mounting portion 5 is brought into contact with the lower surface of the arm 2, and the lower surface of the auxiliary body 4 is brought into contact with the upper surface of the arm 2. At this time, since the elastic sheets 10 and 11 are stretched on the upper surface of the attachment portion 5 and the lower surface of the auxiliary body 4, the attachment portion 5 and the auxiliary body 4 are in contact with the arm 2 via the elastic sheets 10 and 11. Yes, it is possible to prevent the surface of the arm 2 from being damaged by the attachment portion 5 or the auxiliary body 4.

  Next, the bolt 8 is passed from each mounting hole 26 provided in the connecting portion 7 of the auxiliary body 4 to each mounting hole 25 provided in the connecting piece 6 of the mounting portion 5 of the claw body 3, and the tip of each bolt 8 is inserted into its tip. The arm 9 can be clamped between the attachment portion 5 of the claw body 3 and the auxiliary body 4 by screwing and tightening the nut 9. The arm 2 is clamped between the attachment portion 5 and the auxiliary body 4. The claw body 3 can be attached and fixed to the lower surface side of the arm 2 by force. Since the attachment portion 5 and the auxiliary body 4 are in contact with the arm 2 via the elastic sheets 10 and 11 as described above, the attachment portion 5 and the auxiliary body 4 of the arm 2 are brought into close contact with each other by the elastic sheets 10 and 11. The surface can be prevented from slipping, and the nail body 3 can be stably attached to the arm 2.

  As shown in FIG. 1A, the claw body 3 is attached to the arm 2 so that the claw portion 3 a at the tip projects from the tip of the arm 2, and the claw portion 3 a is attached to the opening 1 a of the bucket 1. It is arranged so as to correspond. Since the bucket 1 is rotationally driven in the vertical direction by the hydraulic cylinder 18, by rotating the bucket 1 downward, as shown in FIG. The excavator A can be provided with a function of grasping and moving a heavy object such as the material 28 by holding it between the three claw portions 3a.

  Here, the nail body 3 of the attachment can be attached to the arm 2 by sandwiching the arm 2 from above and below by the base mounting portion 5 and the auxiliary body 4. It is not necessary to add any hand to the arm 2 such as welding or bolt hole machining. Therefore, the arm 2 is not changed, and the arm 2 is not damaged. For example, the claw body 3 can be mounted on the borrowed hydraulic excavator A for use. It will be possible.

  Further, by loosening the tightening of the bolt 8 and the nut 9, the attachment portion 5 and the auxiliary body 4 of the claw body 3 are slid in the front-rear direction and moved along the arm 2 without removing the claw body 3 from the arm 2. The attachment position of the claw body 3 to the arm 2 can be changed. The position of the claw portion 3a of the claw body 3 with respect to the bucket 1 can be adjusted by changing the attachment position of the claw body 3 to the arm 2 in this way, and the bucket 1 and the claw portion 3a are engaged with each other. Can be adjusted.

  Further, as described above, the connecting piece 6 of the attachment portion 5 of the claw body 3 has a vertical distance from the upper surface, which is a surface in contact with the arm 2 of the attachment portion 5, to the upper surface of the connecting piece 6. The connecting piece 6 is inclined so that it is short (L1) and long on the base side (L2). Therefore, when attaching the claw body 3 to the arm 2 formed in a tapered shape as shown in FIG. The connecting piece 6 is arranged in parallel to the upper surface of 2. Accordingly, the connecting portion 7 of the auxiliary body 4 arranged in contact with the upper surface of the arm 2 can be arranged parallel to the connecting piece 6 as shown in FIG. When attaching the claw body 3 to the arm 2 by tightening it with bolts and nuts 8 and 9 at two or more places (2 places) and sandwiching the arm 2 with the mounting portion 5 and the auxiliary body 4, The tightening force of the nuts 8 and 9 becomes uniform. For this reason, the connecting piece 6 and the auxiliary body 4 can be coupled in a stable state, and the attachment strength of the claw body 3 to the arm 2 can be increased.

  In the above embodiment, the claw body 3 is mounted on the lower side of the arm 2, but in the case of the hydraulic excavator A that is mounted so that the opening 1a of the bucket 1 faces upward. The claw body 3 is mounted on the upper side of the arm 2. In this case, the relationship between “upper” and “lower” in the above description is reversed.

DESCRIPTION OF SYMBOLS 1 Bucket 2 Arm 3 Claw body 4 Auxiliary body 5 Attachment part 6 Connection piece 7 Connection part 8 Bolt 9 Nut 10 Elastic sheet 11 Elastic sheet

Claims (4)

  It is an attachment that is used by attaching it to an arm equipped with a bucket of a hydraulic excavator, and is arranged to face the opening of the bucket so that an object can be sandwiched between the bucket by rotating the bucket. The nail body and an auxiliary body for attaching the nail body to the arm are formed, the arm is sandwiched between the attachment part of the base part of the nail body and the auxiliary body, and the attachment part and the auxiliary body are detachably coupled. An attachment of a hydraulic excavator, wherein the nail body is attached to the arm.   Bolts are passed between the connecting pieces provided on both sides of the attachment part of the claw body and the connecting parts formed on both sides of the auxiliary body, and a nut is screwed to the bolt and an arm is attached between the attaching part and the auxiliary body. 2. The attachment of a hydraulic excavator according to claim 1, wherein the claw body is attached to the arm by sandwiching the pin.   The connection piece of the attachment part of the claw body is inclined so that the vertical distance from the surface in contact with the arm of the attachment part to the connection piece is shorter on the front side and longer on the base side. Attachment of the hydraulic excavator as described in 2.   The attachment of the hydraulic excavator according to any one of claims 1 to 3, wherein an elastic sheet is provided on each of the surface of the claw body that contacts the arm of the attachment portion and the surface of the auxiliary body that contacts the arm.

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