JP2017089352A - Work machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a work machine capable of improving its high lift workability while improving its stability.SOLUTION: A work machine (1) includes a carrier (2), a revolving superstructure (3) installed on the carrier in a revolvable manner, a plurality of front work equipment (A, B) for working on the right-and-left front sides of the revolving superstructure, front supporting devices (5a) supporting the plurality of front work equipment, respectively, and mounting parts (6a) via which the front supporting devices are mounted on the revolving superstructure, at least one of the plurality of front supporting devices including a swing post (7a) connected to the mounting part and adapted to swing via a first pin mounted on the revolving superstructure along its vertical direction, and a roll post (30a) connected to the upper part of the swing post in the state of being raised by an equivalent to the height of the swing post and adapted to roll via a second pin mounted on the revolving superstructure along its longitudinal direction.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a work machine used for dismantling work, civil engineering work, and the like, and more particularly to a work machine provided with two articulated front work machines.

  As a work machine used for structure demolition work, waste demolition work, civil engineering construction work, etc., an upper swinging body is pivotably attached to the traveling body, and an articulated front work machine is installed vertically on this upper swinging body It is known that it is pivotably attached to the. There is a hydraulic excavator as an example of such a working machine. In this hydraulic excavator, a front working machine including a boom and an arm is rotatably connected to the upper swing body, and a bucket is rotatably attached to the tip of the arm to perform operations such as excavation, loading, and leveling. In addition, breakers, crushers, grapples, and the like are attached instead of buckets so that work such as structure demolition work and waste demolition work can be performed.

  However, in these general excavators, only one front work machine is attached to one work machine. Therefore, when breaking a structure using a breaker, crusher, rebar cutter, etc. in the structure dismantling work The front work machine is used to destroy the structure. Since this type of hydraulic excavator does not have a function of gripping the structure, each time the structure is crushed with a breaker or the like, the pieces fall, and the pieces that fall off scatter around. When debris scatters, it is necessary to collect and discard the splattered debris, resulting in poor work efficiency. Further, when there is a part to be stored in the object to be dismantled, it is necessary to suspend it with a crane or the like in advance so that it does not fall, and an operation and worker for that purpose are also required.

  As a conventional technique for solving such a problem, for example, a technique described in Patent Document 1 is known.

  In this Patent Document 1, “a dismantling work machine for disassembling and separating an object to be disassembled coupled by at least two members, a traveling body, an upper revolving body provided on the traveling body in a turnable manner, A first work arm comprising a multi-joint work arm mounted on the upper swing body so as to be able to be raised and a work tool provided at a tip of the work arm and holding one member of the object to be disassembled; An oscillating device provided on the front side of the body so as to be able to oscillate to the left and right opposite to the first work arm with respect to the operator's cab, and pivoted about the longitudinal axis of the upper revolving unit. A pivoting device that is provided, a multi-joint work arm that is mounted on the pivoting device, and a work tool that is provided at the tip of the work arm and grips the other member of the object to be disassembled. With a second working arm (see summary) "configuration is described. In Patent Document 1, the rotating device is connected to the front and rear structures via a bearing, and the bearing is fixed by a plurality of bolts.

JP 2009-293230 A

  In the prior art described in Patent Document 1, the swing device (swing post) is provided at the base of the second work arm, and a rotating device (roll post) is provided in front of the swing device. A boom that rotates in the vertical direction is provided in front of the moving device. Therefore, the second working arm is configured to protrude forward of the working machine as compared with the case where there is no rotating device. Thereby, since the weight is added to the front side and the position where the weight is added extends to the front side, the front moment of the dismantling work machine is increased, and there is a possibility that the stability of the work machine is lowered.

  Also, when a structure is destroyed using a breaker, crusher, rebar cutter, etc. in the structure dismantling work, the object to be dismantled usually exists above or at the same level as the work machine body, and works like a hydraulic excavator. This is different from the case where the work object exists below the machine body. Therefore, it is preferable to provide the working arm so as to reach the upper side. However, in the prior art described in Patent Document 1, the pivoting device that pivots the boom is provided at the same level (same height position) as the pivoting device that pivots the pivoting device. It was not configured to reach.

  This is because the boom is attached to the bracket of the rotating device, and this bracket is rotated by the rotating device. Therefore, if the height of the bracket is increased, the weight of the bracket increases. This is because the device needs to be strong enough to support and drive the increased weight. In addition, a driving force for driving the increased weight is required, leading to an increase in load as a demolition work machine. Therefore, the prior art shown in Patent Document 1 is not an appropriate configuration in terms of increasing the height of the bracket of the work machine.

  The present invention has been made in view of the above-described actual situation, and an object thereof is to provide a working machine capable of improving stability and improving workability at high places.

  In order to achieve the above object, a representative aspect of the present invention includes a traveling body, an upper revolving body that is installed so as to be able to swivel with respect to the traveling body, and a plurality of front operations that perform work in front of left and right of the upper revolving body. A work machine comprising: a machine; a plurality of front support devices that respectively support the plurality of front work machines; and a mounting portion that attaches each front support device to the upper swing body. At least one of them is connected to the mounting portion and swingable via a first pin mounted along the vertical direction of the upper swing body, and an upper part of the swing post And a roll post that is connected and rotatable via a second pin mounted along the front-rear direction of the upper swing body.

  According to the present invention, it is possible to improve the stability of the work machine and at the same time improve workability at high places. Problems, configurations, and effects other than those described above will be clarified by the following description of embodiments.

It is the figure which looked at the double-arm type work machine concerning the embodiment of the present invention from the left side. It is the figure which looked at the working machine shown in FIG. 1 from upper direction. It is the figure which looked at the principal part of the front support device in the embodiment of the present invention from the left side of the work machine. It is the figure which looked at the principal part of the front support device in the embodiment of the present invention from the front of the work machine. It is the figure which looked at the principal part of the front support device in the embodiment of the present invention from the right side of the work machine. It is the sectional view on the AA line of FIG. It is the figure which looked at the principal part of the front support device when rotating the roll post in the embodiment of the present invention from the front of the work machine.

  In this embodiment, the roll post is not arranged in front of the swing post as in the above-described prior art, but the roll post is arranged at the upper part of the swing post, thereby suppressing an increase in the front moment of the work machine and stabilizing. The main feature is that the height of the swing post is used to improve workability at the same time.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1 and 2 are views showing an external appearance of a double-arm type work machine according to an embodiment of the present invention. FIG. 1 is a view of the work machine as seen from the left side, and FIG. 2 is a view as seen from above.

  1 and 2, the work machine 1 includes a lower traveling body (traveling body) 2 and an upper revolving body 3 attached to the lower traveling body 2 so as to be able to swivel. A driver's cab 4 is disposed in the vicinity of the front center of the upper swing body 3, and an engine, a pump, and the like (not shown) are mounted on the side and rear of the upper swing body 3. In addition, first and second front support device attachment portions (attachment portions) 6a and 6b are respectively provided on the left and right front portions of the upper swing body 3, and the first and second front support device attachment portions 6a and 6b are provided on the left and right sides, respectively. The first and second front support devices 5a and 5b are provided so as to freely swing left and right (swing) around the first and second vertical pins 76a and 76b, respectively. In the following description, the direction of “front / rear / left / right” is determined based on the viewpoint of the operator seated in the cab 4 unless otherwise specified.

  A first front work machine A and a second front work machine B are attached to the first and second front support devices 5a and 5b, respectively, which rotate in the vertical direction (up and down movement). Hereinafter, the first front work machine A and the components of the first front support device mounting portion 6a and the first front support device 5a related thereto will be denoted by the suffix a and related to the second front work machine B and the related items. The constituent elements of the second front support device mounting portion 6b and the second front support device 5b are given a suffix b to distinguish them.

  The first front support device 5a includes a swing post 7a, a roll post 30a, a swing cylinder 9a, and a roll cylinder 31a.

  The swing post 7a is attached to the first front support device mounting portion 6a of the upper swing body 3 so as to be swingable left and right around the vertical pin 76a, and the roll post 30a is rotatable to the swing post 7a around the front and rear pin 32a. Is attached. In other words, the swing post 7a swings around a vertical axis (vertical axis) that is a central axis (not shown) of the vertical pin 76a, and the roll post 30a is around a front and rear axis that is a central axis (not shown) of the front and rear pins 32a. It is the structure which rotates. The swing cylinder 9a is connected to the swing post 7a and the upper swing body 3, and swings (rotates) the swing post 7a in the left-right direction around the vertical pin 76a. The roll cylinder 31a is connected to the swing post 7a and the roll post 30a, and rotates the roll post 30a around the front and rear pins 32a. The vertical pin 76a corresponds to the “first pin” of the present invention, and the front and rear pins 32a correspond to the “second pin” of the present invention.

  Here, the height position of the lower end 32a1 of the front / rear pin 32a is higher than the height position of the upper end of the vertical pin 76a by a predetermined distance X, and is higher than the upper end 7a1 of the swing post 7a (FIG. 3). And FIG. 4). Therefore, the roll post 30a can be connected to the swing post 7a by the front and rear pins 32a.

  The first front work machine A includes a boom 10a, an arm 12a, a work tool 14a, a boom cylinder 11a, an arm cylinder 13a, and a work tool cylinder 15a. The boom 10a is attached to the roll post 30a so as to be rotatable in the vertical direction, the arm 12a is attached to the boom 10a so as to be rotatable in the vertical direction, and the work tool 14a is attached to the arm 12a so as to be rotatable in the vertical direction. Yes. The boom cylinder 11a is connected to the roll post 30a and the boom 10a, and rotates the boom 10a in the vertical direction by its expansion and contraction operation. The arm cylinder 13a is connected to the boom 10a and the arm 12a, and rotates the arm 12a in the vertical direction by its expansion and contraction operation. The work tool cylinder 15a is connected to the arm 12a and the work tool 14a, and rotates the work tool 14a in the vertical direction by its own expansion and contraction.

  Here, in FIG. 1, the work tool 14 a is a gripping device (grapple), but can be arbitrarily replaced with any one of a cutter, a breaker, a bucket, and other work tools according to the work content of the work machine 1. It is.

  3 to 6 are views showing the appearance of the front support device of the work machine according to the present embodiment. 3 is a view showing the main part of the front support device as seen from the left side of the work machine, FIG. 4 is a view from the front, FIG. 5 is a view from the right side, and FIG. It is an AA sectional view taken on the line.

  The structure of the first front support device 5a will be described in detail. The support post 71a, which is the main body of the swing post 7a, is formed by welding the front plate 712a and the back plate 713a to the front side and the rear side of the side plates 711a, respectively. This is a box-shaped can manufacturing structure. Front and rear bracket plates 72a for attaching the base portion of the roll post 30a with the front and rear pins 32a are welded to the top of the support post 71a. A boss 721a is welded to the front and rear bracket plates 72a to mount the front and rear pins 32a, and a pin hole 722a for inserting the front and rear pins 32a is provided in the boss 721a.

  When the front and rear pins 32a are inserted and fitted into the pin holes 722a, a preset tolerance (gap: play) is provided between the front and rear pins 32a and the pin holes 722a. Other members are rotatable.

  Further, a pair of plate-like front and rear roll cylinder mounting bracket plates 74a are welded to the front and rear of the outer side surface (left side surface) of the support post 71a. The pair of roll cylinder mounting bracket plates 74a are for mounting the roll cylinder 31a with the roll cylinder mounting pins 73a in order to rotate the roll post 30a. A boss 741a is welded to the pair of roll cylinder mounting bracket plates 74a in order to insert the roll cylinder mounting pins 73a.

  The swing post 7a is connected to the first front support device mounting portion 6a by a connecting portion 75a. The connecting portion 75a includes an upper plate 77a welded to an upper position on the back surface of the support post 71a by a predetermined dimension from the lower end, and a lower plate 78a welded to the lower end of the support post 71a. Yes. The upper plate 77a is formed with a pin hole 771a for inserting the upper portion of the vertical pin 76a, and the lower plate 78a is formed with a vertical pin hole 781a for inserting the lower portion of the vertical pin 76a.

  The lower plate 78a has a protruding portion 782a protruding inward of the swing post 7a, and a boss 783a having a hole in which a swing cylinder driving side pin 79a for connecting the swing cylinder 9a is mounted is welded to the protruding portion 782a. . A bracket plate 80a having a boss 801a into which the swing cylinder driving side pin 79a is inserted is welded above the protruding portion 782a on the side surface of the support post 71a.

  Thus, the swing post 7a is a box structure having a predetermined height, and the support post 71a as a swinging part swinging around the vertical pin 76a by driving the swing cylinder 9a, and the support post 71a. It is provided with a pair of bracket plates 72a as a roll post support portion provided on the top of the post 71a and rotatably supporting the roll post 30a via the front and rear pins 32a. Therefore, the roll post 30a is supported by the upper swing body 3 in a state of being raised by the height of the support post 71a.

  The support post 33a which is the main body of the roll post 30a is a box-shaped can-making structure formed by welding the front plate 332a and the back plate 333a to the front side and the rear side of the side plates 331a. The left and right bracket plates 34a for mounting the base portion of the boom 10a with the boom mounting pins 101a are welded to the top of the support post 33a. A boss 341a for mounting the boom mounting pin 101a is welded to the left and right bracket plates 34a, and a pin hole 342a for inserting the boom mounting pin 101a is provided in the boss 341a.

  Both side plates 331a of the support post 33a are bent in the middle so that the lower part is narrowed inward. A boss 35a having a front / rear pin hole 351a for attaching a front / rear pin 32a for connection to the swing post 7a is welded to the lower portion of the support post 33a.

  A pair of roll cylinder mounting bracket plates 37a are welded to the front side and the rear side of the outer side surface (left side surface) of the support post 33a. A boss 371a having a pin hole into which the roll cylinder driving side pin 36a is inserted is welded to the pair of roll cylinder mounting bracket plates 37a, and the roll cylinder 31a is attached to the roll cylinder mounting bracket 36a via the roll cylinder driving side pin 36a. It is attached to the plate 37a.

  The left and right bracket plates 38a are welded to the upper portion of the front surface of the support post 33a, and the boss 381a for inserting the boom cylinder mounting pin 39a into the left and right bracket plates 38a is welded. The boom cylinder 11a for raising and lowering the boom 10a is attached to the roll post 30a via the boom cylinder attachment pin 39a.

  Next, the swing post, roll post, and boom mounting structure will be described. As shown in FIG. 3, a boss 61a having a pin hole 611a is welded to the tip of the first front support device mounting portion 6a of the upper swing body 3, and this boss 61a is connected to the connecting portion 75a of the swing post 7a. A vertical pin (first pin) 76a is inserted between the upper plate 77a and the lower plate 78a, a pin hole 771a in the upper plate 77a, a pin hole 611a in the boss 61a, and a pin hole 781a in the lower plate 78a. Insert from below. Thereby, the swing post 7a and the 1st front support apparatus attaching part 6a are connected.

  As shown in FIG. 6 and the like, the swing cylinder 9a for swinging the swing post 7a is connected to a bracket plate 62a provided on the upper swing body 3 via a swing cylinder mounting pin 63a. The other end is connected through a boss 783a provided on the lower plate 78a of the swing post 7a and a boss 801a provided on the bracket plate 80a of the swing post 7a via a swing cylinder driving side pin 79a inserted and attached. Thus, the swing post 7a is connected to the upper swing body 3 via the swing cylinder 9a.

  Further, as shown in FIG. 5 and the like, the lower boss 35a of the roll post 30a is inserted between the upper bracket plate 72a of the swing post 7a, and the front and rear pins (second pins) 32a are inserted into the bracket plate 72a. The swing post 7a and the roll post 30a are connected by being inserted from the front into the pin hole 722a of the boss 721a and the pin hole 351a of the boss 35a below the roll post 30a. Thus, the roll post 30a can be easily attached to the upper part of the swing post 7a.

  As shown in FIG. 4 and the like, one end of a roll cylinder 31a for rotating the roll post 30a is connected to a boss 741a provided on a roll cylinder mounting bracket plate 74a of the swing post 7a by a roll cylinder mounting pin 73a. The other end of 31a is connected to a boss 371a provided on a roll cylinder mounting bracket plate 37a of the roll post 30a by a roll cylinder drive side pin 36a.

  A boss 102a having a pin hole 1021a is welded to the base of the boom 10a. The boss 102a is inserted between the bracket plates 34a of the roll post 30a, and the boom mounting pin 101a is inserted into the boss 341a of the bracket plate 34a. By attaching the pin hole 342a and the pin hole 1021a of the boom boss 102a from the side, the roll post 30a and the boom 10a are connected.

  As shown in FIG. 3 and the like, the boom cylinder 11a for rotating the boom 10a has one end connected to a boss 381a provided on the bracket plate 38a of the roll post 30a via a boom cylinder mounting pin 39a, and the other end connected to the boom 10a. It is connected to the bracket plate 103a by a boom cylinder drive side pin 104a.

  FIG. 7 is a view of the main part of the first front support device 5a as viewed from the front of the work machine 1 when the roll post 30a is rotated outward. With reference to FIG. 7, the rotation state of the roll post 30a will be described.

  In the roll post 30a, the distance between the roll cylinder driving side pin 36a and the roll cylinder mounting pin 73a at both ends of the roll cylinder 31a is reduced by shrinking the roll cylinder 31a. Now turn right). As a result, the first front work machine A is inclined to the left side (outside) of the upper swing body 3. Therefore, for example, when performing the work of separating a part of the dismantling object gripped by the second front work machine B using the first front work machine A, the first front work machine A is rotated to the left side. The part can be easily separated.

  In addition, although the 2nd front work machine B is provided in the front right side of the upper revolving structure 3, the 2nd front work machine B is comprised similarly to the 1st front work machine A in this embodiment. Therefore, the same constituent elements as those of the first front work machine A are denoted by “b” instead of “a” in the reference numerals of the first front work machine A, and redundant description is omitted.

  As described above, according to the present embodiment, since the roll post 30a is arranged not on the front side of the swing post 7a but on the upper side, the front moment of the work machine 1 does not increase greatly. Therefore, when compared with the prior art, the work machine 1 according to the present embodiment does not cause a decrease in the stability of the work machine during work and during travel. That is, the front and rear working machines A and B have the same size in the front-rear direction as that of the working machine having no joint around the roll axis, and maintain the stability of the working machine 1 while adding the joint around the roll axis. Can do.

  Further, since the roll post 30a is arranged on the upper part of the swing post 7a and is raised by the height of the swing post 7a, the positions of the first and second front work machines A and B are accordingly increased. Can be increased, and the workability of high-altitude work can be improved. And in the structure of the prior art in which the roll post 30a is arranged at the front part of the swing post 7a, in order to secure the height of the roll post 30a, it is necessary to provide a separate member for raising the height. In the embodiment, since the roll post 30a is arranged on the upper part of the swing post 7a, the swing post 7a can also be used as a member for raising. Therefore, it is not necessary to separately provide a member for raising the height of the roll post 30a in order to ensure the height. As a result, the present embodiment can reduce the weight and contribute to the reduction of the number of parts and the cost reduction.

  Furthermore, since the roll post 30a is pin-coupled to the swing post 7a, the number of parts in the roll joint portion can be reduced and the weight increase can be minimized. As a result, the stability of the work machine is improved. Moreover, since it is a simple structure, it is inexpensive. Furthermore, by using pin coupling, durability is improved as compared with the conventional art in which the rotating device is fixed to the swing device by bolting.

  Further, since the first front work machine A and the second front work machine B operate so as to be inclined outward, the front view of the operator in the cab 4 is well maintained. Therefore, work efficiency is increased. Moreover, the operation | work which isolate | separates a dismantling target object can be performed efficiently by operating the 1st front work machine A and the 2nd front work machine B in the direction which mutually spaces apart.

  Here, in the above-described embodiment, the first front work machine A includes the first front support device 5a, and the second front work machine B includes the second front support device 5b. One of the second front work machines B may include the front support device shown in the above embodiment including the swing post and the roll post, and the other may not have such a front support device. That is, one front work machine has an articulated arm structure that does not swing and rotate (a structure that only rotates in the vertical direction), and the other front work machine has an articulated arm structure that swings and rotates as described above. It is also good.

  In the present embodiment, the roll cylinder 31a for driving the roll post 30a is arranged outside the roll post 30a, but may be arranged inside the roll post 30a. In the present embodiment, the swing cylinder 9a for swinging the swing post 7a is disposed inside the swing post 7a. However, the swing cylinder 9a may be disposed outside the swing post 7a.

  In the present embodiment, the front and rear bracket plates 72a are welded to the upper portion of the swing post 7a, the boss 35a is welded to the lower portion of the roll post 30a, and the boss 35a of the roll post 30a is placed between the bracket plates 72a of the swing post 7a. The boss is provided at the top of the swing post 7a, the front and rear bracket plates are welded to the lower portion of the roll post 30a, and the boss of the swing post 7a is inserted between the bracket plates of the roll post 30a. It is also good. Even if comprised in this way, the roll post 30a can be easily attached to the swing post 7a.

  Furthermore, the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the spirit of the present invention, and all the technical matters included in the technical idea described in the claims are all included. The subject of the present invention. The above embodiment shows a preferable example, but those skilled in the art can realize various alternatives, modifications, variations, and improvements from the contents disclosed in this specification, These are included in the technical scope described in the appended claims.

1 Working machine 2 Lower traveling body (traveling body)
3 Upper swing body 5a, 5b Front support device 6a, 6b Front support device mounting portion (mounting portion)
7a, 7b Swing post 30a Roll post 31a Roll cylinder 32a Front and rear pins (second pin)
37a Roll cylinder mounting bracket plate (Roll cylinder mounting bracket)
72a Bracket plate 74a Roll cylinder mounting bracket plate (roll cylinder mounting bracket)
76a, 76b Vertical pin (first pin)
A First front work machine (front work machine)
B Second front work machine (front work machine)

Claims (5)

A traveling body, an upper revolving body installed so as to be able to swivel with respect to the traveling body, a plurality of front work machines that perform work in front of right and left of the upper revolving body, and a plurality that respectively support the plurality of front work machines In a work machine comprising: a front support device; and a mounting portion for attaching each front support device to the upper swing body,
At least one of the plurality of front support devices is
A swing post that is connected to the mounting portion and swingable via a first pin mounted along the vertical direction of the upper swing body;
It is connected to the upper part of the swing post in a state of being raised by the height of the swing post, and is rotatable through a second pin mounted along the front-rear direction of the upper swing body. A work machine comprising a roll post. The work machine according to claim 1,
A working machine, wherein a height position of a lower end of the second pin is higher than a height position of an upper end of the first pin. The work machine according to claim 1 or 2,
A first roll cylinder mounting bracket provided on one side surface of the swing post;
A second roll cylinder mounting bracket provided on the same side surface as the one side surface of the swing post of the roll post;
A work machine comprising: a roll cylinder connected to the first and second roll cylinder mounting brackets. The work machine according to claim 3,
The side surface is the side surface facing the outside of the upper swing body,
A work machine, wherein the roll cylinder is connected to both the swing post and the outside of the roll cylinder. The work machine according to claim 4,
The work machine is characterized in that the roll post rotates around the second pin by the expansion and contraction operation of the roll cylinder, and the front work machine is inclined to the outside of the upper swing body.