JP6135149B2 - Work machine - Google Patents

Description

  The present invention relates to a work machine capable of arranging a cab at a high position.

  Patent Document 1 discloses a work machine in which a box-shaped cab (cab) is attached to a tower fixed to an upper swing body so as to be movable up and down via a parallel link.

  Patent Document 2 discloses a working machine having a lift cab that can lift a cab high as a working machine that performs a cargo handling operation at a harbor.

  Specifically, the cab there is attached to the swivel body via a first parallel link and a second parallel link driven by a hydraulic cylinder, and the cab can be raised by extending both links. The cab can be lowered by contraction.

  In this working machine, a lifting magnet is attached to the tip of the arm. At the time of conveyance, the lifting machine is removed, and the entire working machine is mounted on the platform of the transport truck with the arm bent to the boom side. At this time, the cab is set to be within the range of the height limit during transportation by contracting both links.

  With respect to the present invention, an adapter is detachably attached between a base end portion (boom foot) of a boom and a lower end portion (cylinder foot) of a boom cylinder, and a main bracket and a boom cylinder bracket provided on the upper swing body. Has disclosed a work machine with an increased attachment (Patent Document 3).

  This adapter includes a frame body having a boom mounting portion and a cylinder mounting portion at the upper end portion, and a rod that supports the frame body on its front side. The lower end portion of the frame body is attached to the main bracket, and the rod is attached to the boom cylinder bracket in a vertical posture.

JP 2011-52423 A JP 2001-260952 A JP 2009-121047 A

  For example, as in the working machine of Patent Document 2, in cargo handling work at a port, there is a case where it is desired to arrange the cab as high as possible in order to ensure visibility during the work.

  However, the higher the cab is arranged, the more easily the strength is weakened because the cab is separated from the stable upper swing body. The vibration and the like become large and the comfortability deteriorates.

  In particular, when the cab is placed high, the conveyance of the work machine becomes a problem. In general, work machines are transported by being mounted on a truck or the like. At that time, it is necessary to satisfy the standards of height restriction (about 4 m) and width restriction (about 3 m) defined by laws and regulations.

  In that respect, the working machine of Patent Document 2 can satisfy the height restriction by contracting two parallel links and lowering the height of the cab. However, in the case of a large model, it cannot be transported. However, even if it can be transported, there is a disadvantage that it is restricted by the width limitation.

  That is, the work front is generally installed in the vicinity of the center in the vehicle width direction due to balance. Therefore, the cab and the parallel link juxtaposed on the work front have a limited installation space, and a sufficient space cannot be secured between the work front and the cab.

  If a sufficient space cannot be secured between the work front and the cab, a problem arises particularly when a work device having a large width such as a lifting magnet is mounted on the work front. That is, since the working area of the work front and the working area of the cab overlap, the working range of the work front must be limited in order to avoid contact between them.

  Accordingly, a main object of the present invention is to provide a work machine in which the cab can be disposed at a high position with a margin and the height restriction and width restriction during transportation can be easily cleared.

  The work machine according to the present invention is a work machine in which a machine body is installed on a lower traveling body. The machine body includes an upper frame supported by the lower traveling body, a vertical plate provided on the upper frame, a lifting adapter fixed to the vertical plate so as to be detachable and extending upward, and an upper portion of the lifting adapter An attachment that is detachably attached to the attachment and that moves up and down by hydraulic control, and a cab that is located on the side of the attachment and that is operated inside the attachment. Further, the raising adapter is provided with a support base positioned upward from the upper frame, and the cab is installed on the support base.

  According to this working machine, the raising adapter for raising the attachment is detachably fixed to the vertical plate of the upper frame, and the raising adapter is provided with a support base positioned upward from the upper frame. There is a cab on the table.

  In other words, since the cab is installed on the raised adapter integrated with the vertical plate of the stable upper frame, the cab can be stably supported even if the cab is arranged at a high position above the upper frame.

  Moreover, since the raising adapter can be detached from the vertical plate, it can be separated from the upper frame together with the cab at the time of transportation. As a result, the work machine can be disassembled into an efficient size and transported, and even a large model can easily clear the height limit and width limit during transport.

  In particular, the cab may include a lift device that allows the cab to move up and down.

  By doing so, the cab can be arranged at a higher position, so that workability is improved.

  Further, the support base is provided so as to project laterally from a side portion of the raising adapter, and the cab is installed on a protruding end side of the support base and is located laterally away from the raising adapter. It is preferable to do so.

  Then, even if the cab is located on the side of the attachment, a space can be secured between the cab and the attachment. As a result, the cab can be installed outside the operating range of the attachment, and the attachment can be operated without restriction.

  Since the cab can be removed from the upper frame together with the raising adapter, the height limit and the width limit at the time of transport can be cleared even if configured in this way.

  Further, the attachment is pivotally supported by the raising adapter via a detachable support shaft, the raising adapter has a bearing hole into which the support shaft is inserted, and the support base is located below the bearing hole. It is preferable that the cab be disposed in front of the bearing hole.

  If it does so, the workability | operativity at the time of attaching / detaching an attachment from the raising adapter will improve.

  According to the work machine of the present invention, the cab can be disposed at a high position with a margin, and the height restriction and width restriction during transportation can be easily cleared.

It is a side view which shows the outline of the working machine of this embodiment. It is a front view which shows the outline of the working machine of this embodiment. It is the schematic which expands and shows the principal part of FIG. It is the schematic which decomposes | disassembles and shows a working machine. It is a perspective view which shows the outline of a raising adapter.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. However, the following description is merely illustrative in nature and does not limit the present invention, its application, or its use.

  1 and 2 show a work machine 1 according to this embodiment. This work machine 1 is, for example, a cargo handling work for loading and unloading materials on a ship at a port, a recycling work for carrying in and out a recycled product at a recycling site, a dismantling work at a demolition site, etc. Used for.

  The work machine 1 is a large model that cannot be transported as it is. As shown in FIG. 4, the work machine 1 is configured to be disassembled into a plurality of parts and transported at the work site during transport.

  The work machine 1 includes a lower traveling body 2 and an upper revolving body 3 (machine main body) installed on the lower traveling body 2 so as to be freely rotatable. Note that the directions such as up and down and left and right used in the description are for the state in which the upper swing body 3 faces the traveling direction of the lower traveling body 2 as shown in FIGS.

  The upper swing body 3 includes an upper frame 11, a machine room 12, a counterweight 13, an attachment 14, a cab 15, and the like. The lower traveling body 2 is provided with a lower frame 31, a pair of crawlers 32, 32, and the like. Each crawler 32 is detachably assembled to the left and right of the lower portion of the lower frame 31. A swing bearing 33 is installed on the lower frame 31, and the upper frame 11 is rotatably supported via the swing bearing 33.

  The upper frame 11 is a strength member having excellent strength and rigidity that extends in the horizontal direction, and is configured by joining a frame frame, a beam, and the like to a bottom plate made of a thick metal plate. A pair of vertical plates 16, 16 extending in the front-rear direction while being opposed to the left and right are erected at an intermediate portion in the left-right width direction on the upper surface of the upper frame 11.

  The front end portions 16a of the vertical plates 16 have a substantially triangular shape when viewed from the side. As shown in detail in FIG. 3, the first support portion 17 in which the first shaft hole 17a is opened, The second support portion 18 in which the shaft hole 18a is opened is provided in a left-right facing manner. The 1st support part 17 is provided in the front corner part of each front end part 16a, and the 2nd support part 18 is located back rather than the 1st support part 17, and is provided in the top part of each front end part 16a ( Both support portions are also referred to as support portions 17 and 18).

  Although the attachment 14 can be directly attached to the support parts 17 and 18, in this working machine 1, the raising adapter 40 is fixed to the support parts 17 and 18 so that attachment or detachment is possible. The raising adapter 40 will be described later.

  The machine room 12 is installed in a portion extending from the middle part in the front-rear direction on the upper frame 11 to the rear end. The machine room 12 is covered with a cover and a bonnet, and various devices such as an engine, a hydraulic pump, a control valve, a fuel tank, and a hydraulic oil tank are arranged inside the machine room 12 although not shown.

  A counterweight 13, which is a heavy object, is installed at the rear of the machine room 12. The counterweight 13 maintains the front-rear balance with the attachment 14 installed at the front part of the upper swing body 3.

  The attachment 14 includes a boom 14a, an arm 14b, a lifting magnet 14c, and the like. The lifting magnet 14c is a substantially disk-shaped working device that can be magnetized by electrical control, and is used for the work of transporting metal materials. The lifting magnet 14c is detachably attached to the tip of the arm 14b, and swings around the horizontal axis J1 by hydraulic control of the first cylinder 14d.

  The arm 14b is a columnar strength member, and a base end portion of the arm 14b is pivotally supported around the horizontal axis J2 at the distal end portion of the boom 14a. The arm 14b swings by hydraulic control of the second cylinder 14e. The boom 14a is also a columnar strength member, and a third cylinder 14f that drives the boom 14a by hydraulic control is attached to the boom 14a.

  As shown in FIG. 4, a boom shaft hole 14g corresponding to a second shaft hole 18a and a second bearing hole 44a described later is opened at the base end portion (boom foot) of the boom 14a. A cylinder shaft hole 14h corresponding to a first shaft hole 17a and a third bearing hole 45a to be described later is opened at the base end portion (cylinder foot) of the third cylinder 14f.

(Lifting adapter)
The raising adapter 40 is an auxiliary member that is interposed between the vertical plate 16 and the attachment 14 and is used for raising the support position of the attachment 14. The raising adapter 40 is installed in an upright state so as to extend upward from the support portions 17 and 18 of the vertical plate 16. The raising adapter 40 includes an adapter main body 41, a rod 42, and the like.

  As specifically shown in FIG. 5, the adapter main body 41 includes a cylindrical reinforcing portion 41a and a pair of side plates 41b and 41b joined to both ends of the reinforcing portion 41a. Each side plate 41 b is formed in a vertically long shape and is opposed to each other, and includes a first bearing portion 43, a second bearing portion 44, a third bearing portion 45, and a fourth bearing portion 46.

  As shown also in FIG. 4, the 1st bearing part 43 has the 1st bearing hole 43a corresponding to the 2nd shaft hole 18a, and is provided in the lower end part of each side plate 41b. The 2nd bearing part 44 has the 2nd bearing hole 44a which enables the support of the boom 14a, and is provided in the upper end part of each side plate 41b. The third bearing portion 45 and the fourth bearing portion 46 are provided side by side on the front side edge of each side plate 41b.

  The upper third bearing portion 45 has a third bearing hole 45a that enables the third cylinder 14f to be supported, and the rod 42 is pivotally supported in each of the lower fourth bearing portions 46 so as to be rotatable. Has been. A shaft insertion hole 42 a corresponding to the first shaft hole 17 a of the first support portion 17 is provided at the tip of each rod 42.

  Each rod 42 is pivotally supported by the first support portion 17 by inserting the first support shaft 47 into the shaft insertion hole 42 a and the first shaft hole 17 a to prevent it from coming off. The adapter main body 41 is pivotally supported by the second support portion 18 by inserting the second support shaft 48 into the first bearing hole 43a and the second shaft hole 18a and preventing the second support shaft 48 from coming off. Thereby, the raising adapter 40 is integrated with the vertical plate 16.

  In this work machine 1, the boom foot is pivotally supported by the second bearing portion 44 instead of the second support portion 18 so as to be swingable about the horizontal axis J <b> 3, and the cylinder foot is not the first support portion 17 but the first support portion 17. The three bearings 45 are pivotally supported so as to be swingable. As a result, the attachment 14 moves up and down with the upper end of the raising adapter 40 as a base point, and the workability such as cargo handling work is improved.

  A support base 60 is attached to the raising adapter 40.

  The support base 60 includes a beam member 60a, a support plate 60b, and the like. The beam member 60a is a strength member. When the raising adapter 40 is fixed to the support portions 17 and 18, the beam member 60a is fixed to the upper portion of the side plate 41b facing the opposite side (left side) of the attachment 14 in a cantilevered manner. Overhang in the direction. The support plate 60b is fixed to the protruding end side of the beam member 60a so as to protrude forward of the beam member 60a.

  Therefore, by fixing the raising adapter 40 to the support portions 17 and 18, the support base 60 is positioned away from the upper frame 11. The cab 15 is installed on the support plate 60b of the support base 60 at the high position.

  The cab 15 is a box-shaped cab whose periphery is covered with windows and covers. An operator gets into the cab 15 and the attachment 14 is operated. The cab 15 includes a lift device 15a on the rear side, and can be moved up and down.

  The lift device 15a has a hydraulically controlled link mechanism, which moves the cab 15 up and down. Specifically, the lift device 15a causes the cab 15 to move up and down between the highest position shown by the phantom line in FIGS. 1 and 2 and the lowest position shown by the solid line in FIGS. Can be held in position.

  Therefore, in the case of this work machine 1, since the cab 15 is installed in the raising adapter 40 integrated with the vertical plate 16, the strength is improved and the stability is excellent even when the cab 15 is disposed at a high position. Furthermore, by arranging the cab 15 at the highest position using the lift device 15a, the operator can visually recognize the work state from an extremely high position, and the workability is improved.

  In addition, the cab 15 is installed on the protruding end side of the support base 60 and is located laterally away from the raising adapter 40. Specifically, as shown in FIG. 2, the cab 15 protrudes outward from the end of the upper frame 11 by a distance L in the left-right width direction.

  By causing the cab 15 to protrude from the end of the upper frame 11, a space can be secured between the cab 15 and the attachment 14 even when the cab 15 is positioned on the side of the attachment 14. As a result, the cab 15 can be installed outside the operating range of the attachment 14, and the attachment 14 can be operated without limitation.

  Further, the cab 15 and the support base 60 are installed avoiding the second bearing portion 44. Specifically, the support base 60 is disposed below the second bearing hole 44a, and the cab 15 is disposed forward of the second bearing hole 44a.

  As shown in FIG. 5, when the boom foot is attached to the second bearing portion 44, the third support shaft 49 is inserted into the second bearing hole 44a and the boom shaft hole 14g to prevent the boom foot from coming off. Conversely, when the boom foot is removed from the second bearing portion 44, the third support shaft 49 is extracted from the second bearing hole 44a and the boom shaft hole 14g. At this time, an operation such as hitting the end portion of the third support shaft 49 with a hammer is performed. Therefore, if there is a support base 60 or the like on the extension line in the insertion direction of the second support shaft 48, the removal operation is obstructed.

  In the case of this work machine 1, since the support base 60 and the like are installed avoiding the second bearing portion 44, the boom foot can be attached to and detached from the raising adapter 40 without hindrance.

  Similarly, the cab 15 and the support base 60 are installed avoiding the third bearing portion 45. Specifically, the cab 15 and the support base 60 are disposed above the third bearing hole 45a.

  As a result, when the cylinder foot is attached / detached, the fourth support shaft 50 is inserted and removed between the cylinder shaft hole 14h and the third bearing hole 45a of the third bearing portion 45. Can be done without any problem.

  In addition, in the case of this work machine 1, the height limit and the width limit during conveyance can be easily cleared.

  In this work machine 1, as shown in FIG. 4, it is disassembled and conveyed. For example, the attachment 14, the cab 15 and the raised adapter 40 joined body, the main body of the upper swing body 3, the connection body of the lower frame 31, and the crawler 32 can be individually conveyed. Among these, the joint body of the cab 15 and the raising adapter 40, the main body of the upper swing body 3, and the lower frame 31 are particularly large.

  The main body of the upper swing body 3 and the connecting body of the lower frame 31 have a smaller width dimension W1 by removing the crawler 32, and a smaller height dimension H1 by removing the attachment 14 and the raising adapter 40. Become. By eliminating the cab 15, the height dimension H1 is particularly small. Therefore, the main body of the upper swing body 3 and the connecting body of the lower frame 31 are reduced in size and can be easily accommodated within the range of the height limit and the width limit.

  Since the height dimension H2 of the joined body of the cab 15 and the raising adapter 40 is a distance between the upper end of the cab 15 and the lower end of the raising adapter 40, the height dimension H2 can be easily accommodated within the height limit range. As shown in FIG. 5, the width dimension W2 of the cab 15 and the raising adapter 40 is also the distance from the left end of the cab 15 to the right end of the raising adapter 40. Therefore, even if the cab 15 is overhanging, Can be within the width limit.

  Therefore, according to this work machine 1, since it can be disassembled and transported into an efficient size, it can be transported without being limited in size.

  The work machine 1 according to the present invention is not limited to the above-described embodiment, and includes various other configurations.

  For example, in the embodiment, the work machine 1 in which the lifting magnet 14c is attached to the attachment 14 is shown, but other work devices such as a crusher may be used. The form of the raising adapter 40 is an example. The form of the raising adapter 40 can be changed as appropriate according to the specifications. The form of the support base 60 is also an example, and can be appropriately changed according to the specification.

  The lift device 15a of the cab 15 is not essential, and the cab 15 may be installed directly on the support base 60. A transverse beam member may be provided between the lower surface of the support base 60 and the side plate 41b to reinforce the support of the support base 60.

1 Work machine 2 Lower traveling body 3 Upper swing body (machine body)
DESCRIPTION OF SYMBOLS 11 Upper frame 14 Attachment 15 Cab 15a Lift apparatus 16 Vertical board 17 1st support part 18 2nd support part 40 Raising adapter 60 Support stand

Claims (3)

A work machine in which a machine body is installed on a lower traveling body,
The machine body is
An upper frame supported by the lower traveling body;
A vertical plate provided in the upper frame;
A raised adapter fixed to the vertical plate in a detachable manner and extending upward;
An attachment that is detachably attached to the upper part of the raising adapter, and that moves up and down by hydraulic control,
A cab that is located on the side of the attachment and in which the operation of the attachment is performed;
With
The raising adapter is provided with a support base that is positioned away from the upper frame and on which the cab is installed ,
A work machine in which a lift device for raising and lowering the cab is installed on the support base on the rear side of the cab . The work machine according to claim 1,
The support base is provided so as to protrude laterally from the side of the raised adapter,
A work machine in which the cab is installed on a protruding end side of the support base and is laterally separated from the raising adapter. In the work machine according to claim 1 or 2,
The attachment is pivotally supported by the raising adapter via a detachable support shaft,
The raising adapter has a bearing hole into which the support shaft is inserted,
A work machine in which the support base is disposed below the bearing hole, and the cab is disposed forward of the bearing hole.

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