JP2007326018A - Hydraulic excavator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a hydraulic excavator quickly and surely gripping industrial waste like tires with wheels or cushion bodies for barriers with reinforcing steel plates, and enhancing crushing performance or dismantling performance, and work efficiency. <P>SOLUTION: A pair of right and left crushing protrusions 23, 23 are detachably provided at one side of facing end parts 9b in two pressing holding members 8A, 8B, and a crushing protrusion 27 facingly entering between the right and left crushing protrusions 23, 23 is detachably attached to the end part 17a of a blade part 17 at the other pressing holding members 8B in a state of gripping a gripped object A. The gripped object A is crushed by clamping pressure of the two pressing holding members 8A, 8B. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a hydraulic excavator that can be used for other purposes.

By exchanging the attachment attached to the tip of the arm in a conventional hydraulic excavator, for example, large industrial waste such as tree roots and construction waste wood can be easily and quickly grasped or crushed. There is one that can be made (for example, see Patent Document 1).
Japanese Patent No. 3430362

  Patent Document 1 relates to the prior application of the present applicant. However, work that cannot be achieved with the configuration described in Patent Document 1 alone, or work efficiency is poor even if it can be done, by subsequent research. , It turns out that there are things that take time.

  The present invention further improves the above-described conventional hydraulic excavator, which has been impossible or difficult in the past, specifically, dismantling of wheeled tires, peeling of rubber fenders and It is an object of the present invention to provide a highly versatile hydraulic excavator that can be easily and quickly disassembled and gripped by a small number of attached parts or replacement.

According to the present invention, the above problem is solved as follows.
(1) A pair of front and rear pressure members pivotally attached to the distal end of the movable arm are linked so as to be opened and closed by separate rotating means mounted on the movable arm and operating independently of each other. Then, in the hydraulic excavator that is capable of subjecting the object to be grasped with the both pressure members, a pair of left and right crushing projections is provided on one of the opposing tip portions of the both pressure members, In addition, the opposing crushing projections are attached to the tip of the other crushing member so as to be inserted between the left and right crushing projections in the gripping state of the object to be grasped. Thus, the object to be grasped is crushed.

(2) In the above item (1), the crushing protrusions are vertically long in the vertical direction in the gripping state of the object to be gripped.

(3) In the above-mentioned item (1) or (2), one pressing member is composed of a pair of left and right side pieces and the other pressing member is inserted between the both side pieces. A c-shaped bracket provided with a crushing projection detachably attached to the tip of each side piece, and provided with a crushing projection on the tip of the blade, It is attached so as to be detachable so as to surround the blade edge of the blade portion.

(4) A pair of front and rear pressure members pivotally attached to the distal end of the movable arm are linked so that each of them can be opened and closed by separate rotating means mounted on the movable arm and operating independently of each other. In addition, in the hydraulic excavator that is capable of subjecting the object to be grasped to the opposite pressure with both the pressure members, a scraper having a pointed blade portion is provided on one of the opposed tip portions of the pressure members. The pressing member that faces the scraper is attached to the tip of the other pressing member.

(5) In the above item (4), one pressing member is composed of a pair of left and right side pieces, and the other pressing member is provided with a blade portion inserted between the both side pieces. The scraper is detachably attached to the distal end portions of the both side pieces, and a U-shaped pressing member is attached to the distal end portion of the blade portion so as to be detachable so as to surround the blade edge of the blade portion.

(6) In any one of the above items (1) to (5), a concave portion that opens toward the other pressure member is provided at the tip of one pressure member, and a crushing protrusion is provided in the recess. Alternatively, the base of the scraper can be fitted and attached.

(7) A pair of front and rear pressure members pivotally attached to the distal end of the movable arm are linked so that each of them can be opened and closed by separate rotating means mounted on the movable arm and operating independently of each other. The pressure member is pressed by both pressure members, and one pressure member is composed of a pair of left and right side pieces, and the other pressure member is interposed between the both side pieces. It has a blade part to be inserted, and by rotating both the pressing members in a direction approaching each other, the object to be grasped pressed by the both pressing members is bent and broken at the contact portion with the blade part. In a hydraulic excavator, a pair of left and right fork members are detachably attached to both sides of the other pressure member so as to sandwich the blade portion, and the pressure is applied by both pressure members. A gripping object can be gripped.

(8) In the above item (7), the inner edges of the left and right fork members are positioned closer to one of the pressing members than the cutting edge of the blade portion.

(9) In any one of the above items (3), (5), (7), or (8), the side surface of the blade portion is a crescent shape.

According to the present invention, the following effects can be achieved.
(a) According to the first aspect of the present invention, the pair of left and right crushing projections provided on one of the opposing tip portions of the two pressing members and the tip portion of the other pressing member have With the crushing protrusion provided so as to be inserted between the crushing protrusions, the object to be grasped is brought into contact with only the three points by the two pressure members in the grasping state of the object to be grasped. Can be strong, crushed, or crushed.
In particular, when crushing or dismantling a wheeled tire, from the state in which the tire is stably gripped, further crushing, causing each crushing projection to bite into the tire from three sides, crushing the tire, Since it can be crushed so as to be reduced in the direction, the wheel can be easily removed from the tire in the dismantling operation.

(b) According to the invention described in claim 2, the object to be grasped can be further crushed from the state in which the object to be grasped is stably grasped by the repression of both holding members, and can be reliably crushed or crushed. it can.

(c) According to the invention described in claim 3, each crushing protrusion can be attached and detached as necessary, and can be exchanged with another one, and the blade portion can be used when both holding members are pressed. The blade edge can be protected by the bracket.

(d) According to the invention described in claim 4, the scraper is inserted into the joint portion of the two members joined together, and both members are pressed against the ground or a jig by the pressing member, or the scraper is inserted in the insertion direction. On the other side, the two members can be easily and strongly separated by rotating the two repressing members in a direction to close each other in a state where both members are received.
Therefore, in the dismantling operation of the rubber fender attached to the quay, the rubber fender can be easily and quickly peeled off from the mounting steel plate.

(e) According to the invention described in claim 5, the blade edge of the blade portion can be protected by the pressing member when the object to be grasped is peeled off from the attachment material.

(f) According to the invention described in claim 6, the crushing protrusion or the scraper can be easily attached and positioned.

(g) According to the invention described in claim 7, the hydraulic excavator used for crushing or dismantling the object to be crushed can also be used for grasping the object to be grasped.

(h) According to the invention described in claim 8, the edge of the blade portion can be protected by the left and right fork members when grasping the object to be grasped.

(i) According to the invention described in claim 9, it is possible to easily and reliably grip an object to be gripped having a cylindrical cross section, and to perform cutting smoothly.

Next, embodiments of the present invention will be described in detail with reference to the drawings.
1 to 6 show a first embodiment of the present invention. In the following description, the right side of FIG. 1 is the front and the left side is the rear.

  As shown in FIG. 1, at the front part of the hydraulic excavator (1), the piston rods (2a) (2a) of a pair of left and right first hydraulic cylinders (2) (2) are rotated up and down. The rear end of the first movable arm (3) and the front end of the first movable arm (3) are articulated, and the piston rod (4a) of the second hydraulic cylinder (4) extends and contracts in the front-rear direction. A rotating second movable arm (5) is provided. A crushing device (6) for crushing large objects to be crushed, such as tree roots and building waste wood, is attached to the tip of the second movable arm (5).

  As shown in FIGS. 2 and 3, the crushing device (6) has a pair of front and rear pivoted with a pivot (7) pointing in the left-right direction that is inserted into the tip of the second movable arm (5). The pressure member (8A) (8B) is provided.

  The front side pressure member (8A) has a pair of left and right side pieces (9), (9) whose side shape is substantially crescent shaped with the rear part of the base (9a) being pivotally supported by the pivot (7). Yes. The rear edge of the side piece (9) is a gripping edge (10) whose central portion is recessed in an arc shape toward the front and abuts against the surface of the object to be gripped such as the root of a tree. A front end of the base portion (9a) is pivotally attached to a tip end of a middle-fold link mechanism (11) having a base end pivotally attached to an intermediate portion of the second movable arm (5). The tip of the piston rod (13) of the third hydraulic cylinder (12), which is a turning means for the front side pressure member (8A), is pivotally attached to the middle joint portion of the middle folding link mechanism (11). By extending and contracting the third hydraulic cylinder (12), the front side pressure member (8A) can be rotated in the front-rear direction.

  The base end of the link piece (14) is fixed to both ends of the pivot (7), and the base end of the horizontally long attachment member (15) is attached to the tip of the link piece (14). It is connected with a connecting shaft (16) so that it can rotate together. A rear side pressure member (8B) opposite to the front side pressure member (8A) is fixed to the lower surface of the mounting member (15).

  The rear side pressure member (8B) is a crescent-shaped cutter with a top view welded to the mounting member (15), a lower end portion having an acute pointed shape, and a front edge recessed in an arc shape. (17) is provided, and the blade (17a) having a crescent-shaped side surface is formed on the cutter (17).

  A fourth hydraulic cylinder (18) having a base end pivotally attached to an intermediate portion of the second movable arm (5) and serving as a rotating means for the rear pressure member (8B) is attached to the distal end of the mounting member (15). The tip of the piston rod (19) is pivotally attached.

That is, when the above-mentioned crushing device (6) expands and contracts the piston rod (13) of the third hydraulic cylinder (12), the front side pressure member (8A) is rotated in the front-rear direction, and the fourth hydraulic cylinder When the piston rod (19) of (18) is expanded and contracted, the rear side pressure member (8B) is rotated in the front-rear direction. When the front side pressure member (8A) is rotated backward as much as possible and the rear side pressure member (8B) is rotated forward as much as possible, the rear side pressure member (8B) is moved to the front side pressure member ( 8A) is inserted between the left and right side pieces (9) and (9) and protrudes forward (see FIG. 2).
In this way, by rotating the front and rear pressure members (8A) and (8B) in a direction approaching each other, the object to be gripped by both pressure members (8A) and (8B) Bending crushing or cutting can be performed at the contact portion of the pressing member (8B) with the blade portion (17a) of the cutter (17).

As shown in FIGS. 3 to 5, the front end portions (9b) and (9b) of the left and right side pieces (9) and (9) of the front side pressure member (8A) are directed toward the rear side pressure member (8B). Opened rectangular recesses (20) and (20) are provided. A bolt insertion hole (22) facing forward is passed through the vertical wall (21) serving as the bottom of each recess (20). Each recess (20) is fitted in close contact with a base (24) having a crest projection (23) with a pointed tip in plan view protruding rearward, and the front of the base (24). By screwing the bolt (26) through the bolt insertion hole (22) to the bolt hole (25) provided on the back, the crushing projection (23) is formed on the left and right side pieces of the front compression member (8A). It is firmly attached to the tip (9b) of (9) so as to be detachable.
In the example shown by a solid line in FIG. 5, the pair of crushing protrusions (23) are parallel to each other and face backward, but as shown by an imaginary line in FIG. In this case, they may be provided so as to be inclined inward from each other. In this way, as shown in FIG. 6, when crushing a circular object to be gripped such as a wheeled tire (A), the crushing projection (23) is directed toward the center of the object to be gripped. It is possible to prevent the grasped object from falling off and to improve the safety of work.

In the rear side pressure member (8B), the front end portion (17b) of the cutter (17) has a flat-faced U-shaped bracket in which a flat-pointed crested protrusion (27) protrudes forward ( 28) is fitted so as to surround the blade edge of the blade portion (17a) of the cutter (17), and the bolt insertion hole (29) penetrating the bracket (28) in the left-right direction, and the tip portion of the cutter (17) (17a) is detachably attached by inserting a bolt (31) into a bolt insertion hole (30) penetrating in the left-right direction and fastening with a nut (32).
Thus, as shown in FIG. 6, for example, in a state where the wheeled tire (A) is gripped as an object to be gripped, the crushing protrusion (27) of the rear side compression member (8B) The two crushing projections (23), (23), and (27) are positioned so as to be inserted between the left and right crushing projections (23) and (23) in FIG. From this state, if both pressure members (8A) and (8B) are further pressed, the tire (A1) can be crushed and the wheel (A2) can also be crushed so as to shrink in the radial direction. . At this time, each of the crushing projections (23), (23), and (27) is configured to be vertically long in the vertical direction, so that the holding of the tire (A1) is stable.

7 and 8 are diagrams showing a second embodiment of the present invention.
In the present embodiment, the description of the same parts as those in the first embodiment is omitted.

In this example, as shown in FIG. 7, the concave portions (20), (20) provided at the tip portions (9b) (9b) of the pair of left and right side pieces (9), (9) in the front side pressure member (8A). Next, the base part (34) of the scraper (33) with the pointed blade part (33a) being horizontal is fitted in the same manner as the crushing protrusion (23) in the first embodiment, and attached so as to be removable. On the other hand, the pressing member (35) in a U shape in a plan view so as to face the intermediate portion of the scraper (33) (33) at the tip end portion (17b) of the cutter (17) in the rear side pressing member (8B). ) Is detachably attached with a bolt (36).
Since this pressing member (35) is attached so as to surround the cutting edge of the tip end portion (17b) of the cutter (17), like the bracket (28) in the first embodiment, the cutting edge of the cutter (17) is attached. Can be protected. Further, the pressing member (35) is opposed to be inserted between the left and right scrapers (33), (33) in the front side pressing member (8A), and has a triangular positional relationship in plan view. Yes.

In the present embodiment, as shown by a solid line in FIG. 8, for example, when disassembling the rubber fender (B) attached to the quay, the left and right scrapers (33) and (33) are attached to the rubber fender. In (B), the rubber part (B1) is bitten between the lower edge of one side surface and the mounting steel plate (B2) and pressed against the other side surface of the rubber part (B1) and mounting steel plate (B2). The rubber part (B1) can be peeled off from the mounting steel plate (B2) by contacting the member (35) and then rotating the front side pressure member (8A) backward.
Alternatively, as indicated by an imaginary line in FIG. 8, the rubber member (B1) of the rubber fender (B) is pressed from above to the ground by the pressing member (35), and the ground and the pressing member (35) are pressed. By holding the rubber fender (B), in this state, the left and right scrapers (33) and (33) are bitten from the vertical direction between the rubber part (B1) and the mounting steel plate (B2). It is also possible to peel off the rubber part (B1) from the mounting steel plate (B2).
In this case, it is preferable that one end of the rubber fender (B) is brought into contact with a suitable stopper (C) fixed to the ground and the peeling operation is performed from the other end of the rubber fender (B).

  In the illustrated example, a scraper (33) is detachably provided at the tip of each side piece (9), but a single scraper that is long in the left-right direction is provided on both side pieces (9) (9). You may build in the front-end | tip part.

FIG. 9 is a diagram showing a third embodiment of the present invention.
In the present embodiment, as shown in FIG. 9, a pair of left and right fork members (37) and (37) are detachable so that the cutter (17) is sandwiched between both sides of the rear side pressure member (8B). It can be worn. The tip of each fork member (37) is between a boss portion (38) provided on the link piece (14) and a connecting shaft (16) connecting the link piece (14) and the mounting member (15). It is attached so as to be detachable. Further, the inner edges (37a) and (37a) of the left and right fork members (37) and (37) are positioned closer to the front side pressure member (8A) than the cutting edge of the blade portion (17a) of the cutter (17). .
Thus, the object to be grasped is grasped by the left and right side pieces (9) and (9) of the front side pressure member (8A) and the left and right fork members (37) and (37) of the rear side pressure member (8B). It is possible to protect the cutting edge of the blade portion (17a) of the cutter (17) by the left and right fork members (37) and (37) when both the pressing members (8A) and (8B) are pressed. .

  As described above, in the present embodiment, both the left and right fork members (37) and (37) are attached and detached by sandwiching the blade portion (17a) of the cutter (17) in the rear side pressure member (8B), It can be used not only as a crushing device but also as a gripping device, which is very convenient.

1 is an overall perspective view of a hydraulic excavator in an open state of both side pressure members provided with a crushing device according to a first embodiment of the present invention. Similarly, it is a principal part side view in the closed state of both reed pressure members. It is an expansion perspective view of a crushing apparatus. Similarly, it is an exploded perspective view. Similarly, it is the VV line cross-sectional view of FIG. Similarly, it is a perspective view which shows the holding state of the tire with a wheel as a to-be-held object. It is a perspective view of the crushing apparatus in 2nd Embodiment of this invention. Similarly, it is a perspective view which shows the holding state of the cushion body with a reinforcing iron plate as a to-be-held object. It is a perspective view of the crushing apparatus in 3rd Embodiment of this invention.

Explanation of symbols

(1) Hydraulic excavator
(2) (2) First hydraulic cylinder
(2a) (2a) Piston rod
(3) Movable arm
(4) Hydraulic cylinder
(5) Movable arm
(6) Crusher
(7) Axis
(8A) Front side pressure member
(8B) Rear pressure member
(9) Side piece
(9a) Base
(10) Grip edge
(11) Broken link mechanism
(12) Third hydraulic cylinder
(13) Piston rod
(14) Link piece
(15) Connecting member
(16) Connecting shaft
(17) Cutter
(17a) Blade
(17b) Tip
(18) Fourth hydraulic cylinder
(19) Piston rod
(20) Recess
(21) Vertical wall
(22) Bolt insertion pit
(23) Crushing projection
(24) Base
(25) Bolt hole
(26) Bolt
(27) Crushing projection
(28) Bracket
(29) Bolt insertion hole
(30) Bolt insertion hole
(31) Bolt
(32) Nut
(33) Scraper
(33a) Blade
(34) Base
(35) Pressing member
(36) Bolt
(37) Fork member
(37a) Inner edge
(38) Boss
(A) Tire with wheels (object to be gripped)
(A1) Tire
(A2) Wheel
(B) Rubber fender (Grip object)
(B1) Rubber part
(B2) Mounting steel plate
(C) Stopper

Claims (9)

A pair of front and rear pressure members pivotally attached to the distal end of the movable arm are linked to separate rotating means that operate independently of each other and are attached to the movable arm so as to be opened and closed. In a hydraulic excavator that has a negative pressure member so that the object to be held can be negatively held.
A pair of left and right crushing projections is provided on one of the opposing tip portions of the two pressure members, and the left and right crushing portions are held on the tip portion of the other pressure member in the gripping state of the object to be grasped. A hydraulic excavator, wherein crushing protrusions are attached so as to be inserted between the protrusions, and the object to be grasped is crushed by the repulsive pressure of both repulsive members.   2. The hydraulic excavator according to claim 1, wherein the crushing protrusion is a vertically long one that faces in the up-down direction in a grasped state of the object to be grasped.   One side pressure member is composed of a pair of left and right side pieces, and the other side pressure member is provided with a blade portion inserted between the both side pieces. In addition, the crushing projection was attached as detachable, and a U-shaped bracket provided with a crushing projection was attached at the tip of the blade portion so as to be detachable so as to surround the blade edge of the blade portion. The hydraulic excavator according to claim 1 or 2. A pair of front and rear pressure members pivotally attached to the distal end of the movable arm are linked to separate rotating means that operate independently of each other and are attached to the movable arm so as to be opened and closed. In a hydraulic excavator that has a negative pressure member so that the object to be held can be negatively held.
A scraper having a pointed blade is provided at one of the opposing tip portions of the two pressing members, and a pressing member facing the scraper is attached to the leading end of the other pressing member. And hydraulic excavator.   One side pressure member is composed of a pair of left and right side pieces, and the other side pressure member is provided with a blade portion that is inserted between the both side pieces. 5. A pressing member having a U-shape is detachably attached to the distal end portion of the blade portion so as to be detachable so as to surround the blade edge of the blade portion. Hydraulic excavator.   A concave portion that opens toward the other pressure member is provided at the tip of one pressure member, and a crushing protrusion or a base portion of a scraper can be fitted and attached to the recess. The hydraulic excavator according to any one of claims 1 to 5. A pair of front and rear pressure members pivotally attached to the distal end of the movable arm are linked to separate rotating means that operate independently of each other and are attached to the movable arm so as to be opened and closed. A pressing member is used to press the object to be gripped, and one pressing member is composed of a pair of left and right side pieces, and the other pressing member is inserted between the both side pieces. It is assumed that it has a blade part, and by rotating both pressure members in a direction approaching each other, the object to be gripped by both pressure members can be bent and crushed at the contact part with the blade part. In the hydraulic excavator
A pair of left and right fork members are detachably attached to both sides of the other pressure member so as to sandwich the blade portion, and the object to be grasped can be gripped by the pressure of both pressure members. Hydraulic excavator characterized by   8. The hydraulic excavator according to claim 7, wherein the inner edges of the left and right fork members are positioned closer to one of the pressure members than the blade edge of the blade portion. The hydraulic excavator according to any one of claims 3, 5, 7 and 8, wherein the blade portion has a crescent-shaped side surface.

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