JP2015209016A - Track/road excavator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a track/road excavator that comprises a function of preventing an error in the lever operation.SOLUTION: A track/road excavator 100 comprises: an undercarriage 110 comprising a pair of left and right crawlers 11 for traveling on land, and track wheels 12, 13 for traveling on a track; a superstructure 120 held pivotably on the upper part of the undercarriage 110; a leader 20 which liftably supports an auger 22 that is an excavating device, and is held in front of the superstructure 120 so as to undulate; a right operation lever 43 for operating a right crawler 11a; a left operation lever 44 for operating a left crawler 11b; and a change-over switch for switching between a land mode of traveling with the crawlers 11 and a track mode of traveling with the track wheels 12, 13. When the track mode is selected by the change-over switch, a cap 50 for integrating the head parts of the right operation lever 43 and the left operation lever 44 is mounted thereto, and thereby the right operation lever 43 and the left operation lever 44 can be operated simultaneously.

Description

  The present invention relates to an excavator main body having a leader standing vertically, a track wheel for traveling on a track, a traveling device for traveling on land, and an outrigger for receiving a moment generated by excavation. The present invention relates to an amphibious excavator having a jack, and more specifically, to a technique including a component for locking a lever that assists operation when the amphibious excavator is on a track.

  When pile driving work or ground improvement work is performed near railway lines, it may be inconvenient for an excavator equipped only with crawlers. Excavators equipped with crawlers can perform work near the tracks, but there is a risk of trajectory damage due to movement on the crawler, and excavation occurs because the presence of the trajectory hinders movement on the crawler. This is because workability is significantly reduced. In order to solve this problem, a technique such as Patent Document 1 is disclosed.

  Patent Document 1 discloses a technology related to a road-rail vehicle. A track-and-rail vehicle that has a track wheel that can be moved up and down on a traveling body having a land traveling means, and that can be switched between land traveling and track traveling by raising and lowering the track wheel. The housing can be stored so as not to protrude from both ends in the traveling direction.

JP-A-9-142116

  However, when a road-rail vehicle moves on a track, a dedicated operation panel for track travel is not provided, and it is necessary to operate using a land travel lever. In addition, while the land traveling lever can be controlled so that the crawler rotates in different directions on the left and right, when used for traveling on a track, it must be controlled so that the left and right wheels rotate in the same direction. The operation method is different when running on land and on track. For this reason, the technique which prevents an operation mistake was calculated | required. Such a problem is not shown in Patent Document 1.

  Accordingly, an object of the present invention is to provide an amphibious excavator having a function of preventing an error in lever operation in order to solve the above-described problem.

  In order to achieve the above object, an amphibious excavator according to an aspect of the present invention has the following characteristics.

(1) A lower traveling body having a pair of left and right crawlers traveling on land and an orbiting wheel traveling on a track, an upper swinging body that is pivotably held on the upper portion of the lower traveling body, and an excavating device A right-handed operating lever for operating the right side of the crawler, and a left for operating the left side of the crawler. An operation lever, and a changeover switch that switches between a land mode that runs on the crawler and a track mode that runs on the track wheel, and when the track mode is selected with the changeover switch, the right operation lever and the A cap that integrates the head of the left operating lever is attached, and the right operating lever and the left operating lever are operated simultaneously.

  According to the aspect described in (1) above, the right operating lever and the left operating lever can be operated in the same direction by integrating the heads of the right operating lever and the left operating lever with a cap. In the land mode, the right and left control levers can be operated separately, but in the orbit mode, the right and left control levers can be operated simultaneously by attaching caps. It is possible to prevent erroneous operation. As a result, it is possible to prevent an operator of the amphibious excavator from operating erroneously and to reduce an operator's psychological burden.

(2) The road-rail excavator according to (1), further comprising a bracket that connects a shaft of the right operation lever and a shaft of the left operation lever, wherein the bracket is the shaft of the right operation lever or the left operation lever. A fixed portion fixed to one of the shafts, and a plate rotatably supported by the fixed portion and holding the shaft of the other left operating lever or the right operating lever by falling down It is preferable to comprise.

  According to the aspect described in (2) above, the right operation lever and the left operation lever are connected not only by the cap but also by the bracket. For this reason, it is possible to more reliably connect the right operation lever and the left operation lever, and since the connection is based on a retractable plate, the connection can be performed with a simple operation. Therefore, it is possible to prevent an operator's erroneous operation of the road-rail excavator and reduce the operator's psychological burden.

It is a left side view of the amphibious excavator of this embodiment. It is a top view of the road-rail excavator of this embodiment. It is a front view of the road-rail excavator of this embodiment. It is a side view which shows the state where the amphibious excavator of this embodiment is moving on the track. It is a top view at the time of performing excavation construction in the vicinity of a track in which two rows of tracks are laid in this embodiment. It is a side view which shows the mode inside the cab of this embodiment. It is a top view which shows the mode inside the cab of this embodiment. It is a front view which shows the mode inside the cab of this embodiment. It is an enlarged side view of the lever part of this embodiment. It is an enlarged front view of the lever part of this embodiment. It is a top view of a connection bracket of this embodiment. It is a hydraulic circuit used for the amphibious excavator of this embodiment.

  First, an embodiment of the present invention will be described with reference to the drawings. In FIG. 1, the left side view of the amphibious excavator 100 of this embodiment is shown. In FIG. 2, the top view of the amphibious excavator 100 is shown. In FIG. 3, the front view of the amphibious excavator 100 is shown. Note that the track-and-drill excavator 100 shown in FIGS. 1 to 3 is in a land running state. The road-rail excavator 100 includes a lower traveling body 110 and an upper turning body 120. The lower traveling body 110 includes a crawler 11 that travels on rough terrain, and a front wheel 12 and a rear wheel 13 that travel on a track. The track wheel front wheel 12 is moved in the vertical direction by the track front wheel hydraulic cylinder 14, and the track wheel rear wheel 13 is moved in the vertical direction by the track rear wheel hydraulic cylinder 15. The state shown in FIG. 1 is at the retracted end of the track front wheel hydraulic cylinder 14 and the track rear wheel hydraulic cylinder 15, and the track wheel front wheel 12 and the track wheel rear wheel 13 are raised.

  Further, the lower traveling body 110 is provided with a turning device 16, and the upper turning body 120 is rotatably held. The upper swing body 120 includes two front outrigger jacks 23 (right front jack 23a and left front jack 23b) in front of the base 17, and two rear outrigger jacks 25 (right rear jack 25a and left rear jack 25b) in the rear. ing. The vehicle body of the amphibious excavator 100 can be lifted by the front outrigger jack 23 and the rear outrigger jack 25, or can be supported so as to suppress vibration of the vehicle body when excavating with the auger 22 by the amphibious excavator 100. A driver's cab 18 on which an operator is boarded is provided on the upper portion of the base 17, and a reader 20 that holds an auger 22 for excavating the ground is provided. The leader 20 is configured to be able to stand up and fall by a hydraulic cylinder 21.

  FIG. 4 is a side view showing a state where the road-rail excavator 100 is moving on the track. In the road-rail excavator 100, the hydraulic cylinder 21 is at the retracted end, and the leader 20 is lying down. Further, the track front wheel hydraulic cylinder 14 and the track rear wheel hydraulic cylinder 15 are at the forward end, and the track wheel front wheel 12 and the track wheel rear wheel 13 are in a state of being able to travel on the track. . That is, the track wheel front wheel 12 and the track wheel rear wheel 13 are arranged below the crawler 11. The track wheel front wheel 12 and the track wheel rear wheel 13 are engaged with the upper end of the track R. The road-rail excavator 100 can be self-propelled on the track in the situation shown in FIG. In the state of FIG. 4, the maximum height and maximum width of the amphibious excavator 100 are within the vehicle limits (for example, maximum width 3000 mm, maximum height 4100 mm) defined by the railway company.

  FIG. 5 shows a plan view when excavation work is performed in the vicinity of the track on which two rows of tracks are laid. In this case, the upper turning body 120 is depicted as being turned 90 degrees with respect to the lower traveling body 110. Further, as shown in FIG. 5, the first track R1 and the second track R2 are laid in parallel, and a virtual center line CL is shown therebetween. If the distance between the first orbit center R1A that is the center of the first orbit R1 and the second orbit center R2A that is the center of the second orbit R2 is an inter-orbit distance L1, a distance that is ½ of the inter-orbit distance L1. A center line CL is disposed at the center. Here, a movable distance L2 is defined, and the movable distance L2 is a distance from the first orbit center R1A to the center line CL. The circle drawn by the turning radius L4 from the rotation center KK of the road-rail excavator 100 is preferably on the first track center R1A side from the center line CL. Therefore, the turning radius L4 is set smaller than the movable distance L2.

  FIG. 6 is a side view showing the inside of the cab 18. The cab 18 is provided with a front operation panel 30 and a side operation panel 31, and a plurality of operation levers and switches are arranged in each. FIG. 7 shows a plan view of the inside of the cab 18. The front operation panel 30 includes a first operation panel 32 and a second operation panel 33. An operator sits on the seat 35. The second operation panel 33 includes an auger rotation lever 41, a right operation lever 43, and a left operation lever 44. The auger rotation lever 41 is an operation lever that rotates the auger 22. The right operation lever 43 is an operation lever that operates the right side of the crawler 11, and the left operation lever 44 is an operation lever that operates the left side of the crawler 11.

  In FIG. 8, the front view inside the cab 18 is shown. FIG. 9 shows an enlarged side view of the lever portion, and FIG. 10 shows an enlarged front view of the lever portion. In FIG. 11, the top view of the connection bracket 60 is shown. The right operation lever 43 and the left operation lever 44 provided in the second operation panel 33 are covered with a cap 50 indicated by a two-dot chain line in FIG. The cap 50 is made of a resin or rubber material, and has a hole provided on the lower surface to cover the front end portions of the right operation lever 43 and the left operation lever 44, and the top of the right operation lever 43 and the left operation lever 44. The right operation lever 43 and the left operation lever 44 can be integrated so as to be covered. The outer periphery of the cap 50 is processed such as cornering so that the operator can easily grip and operate it.

  In addition to the cap 50, the right operation lever 43 and the left operation lever 44 are provided with a connection bracket 60. As shown in FIGS. 10 and 11, the connection bracket 60 is fixed to the shaft 43 a of the right operation lever 43 by fixing a fixing portion 61 with a bolt. A rotation support portion 62 is fixed to the fixed portion 61, and a plate 63 cut out in a U shape is rotatably attached to the rotation support portion 62. The plate 63 is pivotally supported by the rotation support portion 62 so as to be able to stand and flatten, and holds the shaft 44a of the left operation lever 44 at a portion notched in a U-shape as shown in FIG. It has become.

  The cap 50 and the connecting bracket 60 are attached when the track-and-rail excavator 100 is in the track mode in a state where the track wheel front wheel 12 and the track wheel rear wheel 13 are lowered. Therefore, the operator who gets on the cab 18 can operate the right operation lever 43 and the left operation lever 44 together.

  FIG. 12 shows a hydraulic circuit diagram used for the road-rail excavator 100. In the hydraulic circuit 300, the turning device 16 is provided with a trajectory frame raising Li1, a trajectory frame lowering Li2, a left traveling forward Li3, a left traveling backward Li4, a right traveling backward Li5, and a right traveling forward Li6 and a drain D from the cab 18. The swivel joint 27 is connected to the lower traveling body 110 side. The crawler traveling circuit 301 and the on-orbit traveling circuit 302 are connected to each other, and the left switching circuit 304 and the right switching circuit 305 switch the respective modes. The left side switching circuit 304 is provided with a switching valve for switching the connection destination of the left traveling forward Li3 and the connection destination of the left traveling backward Li4 to the crawler traveling circuit 301 or the on-orbit traveling circuit 302, respectively. The right switching circuit 305 is provided with a switching valve for switching the connection destination of the right traveling backward Li5 and the connection destination of the right traveling forward Li6 to the crawler traveling circuit 301 or the on-orbit traveling circuit 302, respectively. That is, the land mode and the orbit mode can be switched by switching the left side switching circuit 304 and the right side switching circuit 305.

  The crawler running circuit 301 includes a right control circuit 312 that controls the crawler right side 11a and a left control circuit 311 that controls the crawler left side 11b. The left control circuit 311 is connected to the left traveling forward Li3 and the left traveling backward Li4, and the right control circuit 312 is connected to the right traveling backward Li5 and the right traveling forward Li6.

  When the right operation lever 43 is tilted forward, hydraulic pressure is supplied to the right traveling backward Li5, and the hydraulic motor 312a included in the right control circuit 312 drives the crawler right side 11a in the forward direction. When the right operation lever 43 is tilted backward, the hydraulic pressure is supplied to the right traveling forward Li6, and the hydraulic motor 312a included in the right control circuit 312 drives the crawler right side 11a in the backward direction. On the other hand, when the left operation lever 44 is tilted forward, the hydraulic pressure is supplied to the left traveling forward Li3, and the hydraulic motor 311a included in the left control circuit 311 drives the crawler left side 11b in the forward direction. When the left operating lever 44 is tilted backward, the hydraulic pressure is supplied to the left traveling backward Li4, and the hydraulic motor 311a provided in the left control circuit 311 drives the crawler left side 11b in the backward direction.

  The on-track running circuit 302 includes a front wheel control circuit 321 that controls the front wheel 12 for the track and a rear wheel control circuit 322 that controls the rear wheel 13 for the track. The front wheel control circuit 321 is connected to the left traveling forward Li3 and the left traveling backward Li4, and the rear wheel control circuit 322 is connected to the right traveling backward Li5 and the right traveling forward Li6.

When the right operating lever 43 and the left operating lever 44 are tilted forward, the hydraulic pressure is supplied to the left traveling forward Li3, the hydraulic motor 321a is driven in the forward direction of the track wheel front wheel 12, and the hydraulic pressure is applied to the right traveling backward Li5. Is supplied, and the hydraulic motor 322a drives the track wheel rear wheel 13 in the forward direction. On the other hand, when the right operation lever 43 and the left operation lever 44 are tilted backward, the hydraulic pressure is supplied to the left traveling backward Li4, the hydraulic motor 321a is driven in the backward direction of the track wheel front wheel 12, and the right traveling forward Oil pressure is supplied to Li6, and the hydraulic motor 322a is driven in the backward direction of the rear wheel 13 for the track.

  The trajectory frame raising Li1 acts on the track front frame circuit 341 to operate the track front wheel hydraulic cylinder 14, and the track rail lowering Li2 acts on the track track rear circuit 342 to operate the track rear wheel hydraulic cylinder 15. The brake unit circuit 330 acts on both the crawler traveling circuit 301 and the on-orbit traveling circuit 302, and acts on the hydraulic motors 311a, 312a, 321a, and 322a so that the road-rail excavator 100 decelerates. .

  The amphibious excavator 100 according to this embodiment has the above-described configuration, and thus has the following operations and effects.

  For example, it is possible to prevent an accidental operation of the amphibious excavator 100 by operating only one of the left traveling forward Li3 to the right traveling forward Li6 in the on-orbit movement mode due to an operator's operation mistake or the like. be able to. This is because the road-rail excavator 100 has the following configuration. A lower traveling body 110 provided with a pair of left and right crawlers 11 traveling on land, an orbiting wheel 12, 13 traveling on the track, an upper revolving body 120 that is pivotably held above the lower traveling body 110, and excavation This is an amphibious excavator 100 that includes an auger 22 that is capable of moving up and down and a reader 20 that is held in front of the upper swing body 120 so as to be raised and lowered.

  A changeover switch that switches between a right operation lever 43 that operates the crawler right side 11a, a left operation lever 44 that operates the crawler left side 11b, and a land mode that runs on the crawler 11 and a track mode that runs on the track wheels 12 and 13. (A switch provided in the left switching circuit 304 and the right switching circuit 305), and a cap 50 that integrates the heads of the right operation lever 43 and the left operation lever 44 when the track mode is selected with the switch. Thus, the right operation lever 43 and the left operation lever 44 can be operated simultaneously.

  Specifically, a connection bracket 60 that connects the right operation lever 43 and the left operation lever 44 at the shaft 43a or the shaft 44a is provided, and the connection bracket 60 is one of the right operation lever 43 and the left operation lever 44. A fixing portion 61 fixed to the shaft portion and a retractable plate 63 are provided, and the other shaft portion is held by tilting the plate 63. By doing so, the right operation lever 43 and the left operation lever 44 are integrated, and erroneous operation can be prevented.

  As shown in FIG. 12, the drive system of the road-rail excavator 100 uses hydraulic motors 311a, 312a, 321a, and 322a. For this reason, the track wheel front wheel 12 and the track wheel rear wheel 13 as well as the crawler 11 (the crawler right side 11a and the crawler left side 11b) are driven by the hydraulic motors 311a, 312a, 321a, and 322a. The operation levers and switches provided on the front operation panel 30 and the side operation panel 31 of the cab 18 are operated.

  In particular, the right operation lever 43 and the left operation lever 44 provided in the second operation panel 33 are used for the movement of the amphibious excavator 100. However, the crawler 11 used in the land mode has cases where the crawler right side 11a and the crawler left side 11b have different rotation directions, whereas the track wheel front wheel 12 and the track wheel rear wheel 13 used in the track mode are different. , It does not require an operation with different rotation directions before and after. However, from the viewpoint of an operator who operates the road-rail excavator 100 using the cab 18, it is not preferable that a plurality of operation levers for controlling the movement of the road-rail excavator 100 are provided. For this reason, in the orbital mode, the right operation lever 43 and the left operation lever 44 are operated in the same direction.

  However, if the right operation lever 43 and the left operation lever 44 are tilted at different timings, it is not convenient in the orbit mode. This is because in such a case, the operation is such that one wheel is dragged. For this reason, it is desirable to integrate by means such as the cap 50 and the connecting bracket 60, and it is desirable that the method be as simple as possible. If the cap 50 is used, the heads of the right operation lever 43 and the left operation lever 44 are integrated with each other through holes provided in the cap 50, so that simultaneous operation becomes easy. In addition, there is an effect that the operator can be aware that the orbit mode is set. In addition, since the right operation lever 43 and the left operation lever 44 can be connected more safely and easily by providing the connection bracket 60, it is possible to avoid erroneous operation of the road-rail excavator 100.

  As mentioned above, although embodiment of the amphibious excavator 100 which concerns on this invention was described, this invention is not necessarily limited to this, A various change is possible in the range which does not deviate from the meaning. For example, with respect to the configuration of the road-rail excavator 100, changing the positions and configurations of the front outrigger jack 23 and the rear outrigger jack 25 is not hindered. Moreover, it does not prevent changing the shape of the cap 50 and the shape of the connecting bracket 60 within the scope of the invention.

11 Crawlers 12, 13 Track Wheel Front Wheel, Rear Wheel 18 Driver's Stand 27 Swivel Joint 43 Right Operation Lever 44 Left Operation Lever 50 Cap 60 Connecting Bracket 100 Railroad Excavator 110 Lower Traveling Body 120 Upper Revolving Body 300 Hydraulic Circuit 301 Crawler Traveling Circuit 302 Circuit for running on track 304, 305 Left side, right side switching circuit 311, 312 Left control, right control circuit 321, 322 Front wheel, rear wheel control circuit 330 Brake unit circuit 341, 342 Railroad frame front circuit, rear circuit

Claims (2)

A lower traveling body having a pair of left and right crawlers traveling on land and an orbiting wheel traveling on the track, an upper revolving body that is pivotably held on the upper portion of the lower traveling body, and a drilling device that can be moved up and down And a leader that is held in a undulating manner in front of the upper swing body,
A right operation lever for operating the right side of the crawler, a left operation lever for operating the left side of the crawler, and a changeover switch for switching between a land mode traveling on the crawler and a track mode traveling on the track wheel. ,
When the trajectory mode is selected with the changeover switch, a cap that integrates the heads of the right operation lever and the left operation lever is attached, and the right operation lever and the left operation lever are operated simultaneously.
Road-rail excavator characterized by The amphibious excavator according to claim 1,
A bracket for connecting the shaft of the right operating lever and the shaft of the left operating lever;
The bracket is fixed to one of the shaft of the right operating lever or the shaft of the left operating lever, and is pivotally supported on the fixed portion and is pivoted on the other, so that the other left operation is A plate for holding the shaft of the lever or the shaft of the right operation lever,
Road-rail excavator characterized by

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