JP6104705B2 - Small excavator - Google Patents

Description

The present invention relates to, for example, a small rear swivel excavator , and more particularly to a small rear swivel excavator provided with console devices on both the left and right sides of a driver's seat.

  In general, a hydraulic excavator, which is a typical example of a construction machine, has a vehicle body composed of a self-propelled lower traveling body and an upper revolving body that is turnable on the lower traveling body. Is provided so that the working device can move up and down.

  The upper swing body includes a cab having a driver's seat on which an operator is seated forward, and left and right console devices that are located in the cab and are disposed on both the left and right sides of the driver's seat. Is provided. These left and right console devices are operated by an operator seated in the driver's seat in order to operate the work device attached to the front side of the console box and the front side of the console box. And an operating lever having a lever portion. Further, the cab has a driver's seat on the floor member, and a cab box is provided so as to cover the periphery and the upper portion of the driver's seat.

  Here, in recent hydraulic excavators, the upper swing body is formed in a circular shape when viewed from above so that it can be operated even in a narrow work site, and is called, for example, a rear ultra-small swing type. The rear ultra-small turning excavator is configured to be capable of turning in the range of the vehicle width in a state where the upper turning body is substantially within the vehicle width of the lower traveling body.

  In this case, since the cab is the one on which the operator is boarded, the cab does not protrude from the circular range drawn during the turning operation so as not to collide with surrounding obstacles when the upper turning body is turned. Are arranged as follows. However, in the rear ultra-small turning hydraulic excavator, the upper turning body is downsized, and the area that can be used for installing the cab is also reduced. For this reason, in order to fit a cab box having a quadrangular shape in a plan view in a circular range, the cab box has a small width in the left and right directions, and an internal living space becomes small.

  Therefore, in the cab box used for the hydraulic excavator of the rear ultra-small turning type, the middle part in the front and rear directions becomes the peak of the mountain shape so that the left surface does not protrude from the circular range mentioned above, and the front and rear directions Some of them are formed in a pentagonal shape by retracting the end of. As a result, in the rear ultra-small turning type hydraulic excavator, the cab box is formed in a pentagonal shape when viewed from above, and the left side of the cab box faces the left console device (driver's seat) with its front side position facing from the rear side to the front side. It is formed to be inclined so as to approach (see, for example, Patent Document 1).

JP 2009-287391 A

  By the way, in the rear ultra-small swing type hydraulic excavator with the upper swing body downsized, the cab box operated by the operator is also subject to downsizing, so in the cab box, the driver's seat, the left and right consoles There is a problem that the apparatus must be placed close to each other and the working environment is poor. In particular, in a pentagonal cab box, the front side position of the left side is inclined toward the driver's seat. Therefore, the left console device has to be disposed close to the driver's seat in order to avoid the front position of the left surface, and there is a problem that the working environment is further deteriorated.

The present invention has been made in view of the above-described problems of the prior art, and an object of the present invention is to arrange the left console device at a position away from the operator's seating position in the left and right directions, thereby increasing the size of the driver's seat and working. An object of the present invention is to provide a hydraulic excavator of a small rear turning type that can improve the working environment by expanding the space.

A rear small turning excavator according to the present invention is provided with a self-propelled lower traveling body, an upper revolving body that is turnably mounted on the lower traveling body, and an upper revolving body that can be raised and lowered. The upper turning body has a width dimension in the left and right directions substantially equal to the vehicle width of the lower traveling body, and fits within a virtual circle with a turning radius centered on the turning center, The rear surface of the counterweight is formed so as to be within the vehicle width of the lower traveling body when turning on the lower traveling body, and the upper turning body includes a turning frame forming a support structure, and the turning frame A cab provided on the upper front side and having a driver's seat on which an operator is seated forward, and left and right console devices provided on both the left and right sides of the driver's seat located in the cab. with which the left and right of the con Lumpur apparatus, before, left consisting box body extending rearward, and right console boxes, seated in the driver's seat to manipulate attached to the front side of the left and right console boxes the working device It is composed of left and right operation levers having lever portions operated by an operator.

In order to solve the above-mentioned problem, the feature of the configuration adopted by the invention of claim 1 is that the cab does not protrude from the virtual circle of the turning radius when the upper turning body is turned. , in a plan view, front plate, rear plate, the left front side plate, a left rear side plate, right side plate are formed as pentagonal box body by top plate, in a plan view seen from above of the cab, the left of the right of the console device, the left console box of at least the left console device, the left relative to the driver's seat, the interval in the right direction, Ru is disposed inclined to be narrower in a wide front at the rear side of the driver's seat configuration and then, left console box of the left console device is formed as a hollow box body which forms a rectangular shape as viewed from above, left, left side surface which faces at an interval in the right direction, and the right side portion, between the respective side portions Has an upper surface portion which covers the upper, left front side plate of the cab, on the left side position facing the left side surface of the left console box of the left console device, the left console box toward the front from the rear are inclined to approach the left side surface of the left console box is to have a structure that will be disposed inclined so as to extend in parallel along a said left front side plate of the cab.

The invention according to claim 2 is a console in which at least the left console device extends in the length direction of the left console box when a straight line extending forward and rearward through the center of the driver seat is a driver seat center line. the spacing dimension between the center line and the driver's seat center line, lies in that a configuration that will be disposed at an angle relative to the driver's seat to be smaller increase in the front in the rear side.

According to a third aspect of the present invention, there is a rectangular space between the left side surface portion of the left console box of the left console device and the left front side plate of the cab facing the left side surface portion. in that is a structure that is provided.

The invention of claim 4, wherein the left console device is to the left console box is configured that will be disposed inclined along a said left front side plate of the cab.

According to the first aspect of the present invention, the left and right console devices are provided on both the left and right sides of the driver's seat. In addition, of the left and right console devices, at least the left console box of the left console device has a left and right spacing with respect to the driver's seat on the rear side of the driver's seat in a plan view seen from above the cab. It is arranged so as to be wide and narrow on the front side. Here, the cab is formed as a pentagonal box by a front plate, a rear plate, a left front side plate, a left rear side plate, a right side plate, and a top plate in plan view, and the left front side plate of the cab is the left side plate Inclined so as to approach the left console box from the rear side to the front side at the left surface position facing the left side surface portion of the left console box of the console device. On this, the left console device is configured such that the left side surface portion of the left console box is inclined so as to extend in parallel along the left front side plate of the cab. Thus, for example, by tilting the left front side plate rear cab so as to approach the left side surface of the left console box on the left console device towards the front, the left console box on the left console device is inclined, It can be arranged so as to be inclined so as to extend parallel to the left front side plate of the cab.

Therefore, since the left console device can be arranged away from the driver's seat, a space can be secured between the left console box of the left console device and the driver's seat. As a result, by using the space between the left console box and the driver's seat of the left console device, for example, the driver's seat can be changed to a large comfortable seat and the work environment can be improved. it can. In particular, since the left console box of the left console device has a wide left and right spacing with respect to the driver's seat on the rear side of the driver's seat, the operator can sit down with a margin. On the other hand, by using the space between the left console box and the cab of the left console device, for example, an accommodation space such as a pocket for accommodating various articles can be provided.
That is, the left console device, because it is possible to disposed inclined so as to extend in parallel and along the left console box left front side plate of the cab, approached the left console box on the left console device to the left front side plate position Can be arranged. Alternatively, an effective space that is easy to use can be provided between the left console box and the left front side plate of the left console device. As a result, when the left console box of the left console device is arranged at a position close to the left front side plate, a space can be formed around the driver's seat, so that the driver's seat is changed to a large comfortable seat. And the working environment can be improved. On the other hand, when an effective space is provided between the left console box and the left front side plate of the left console device , an accommodation portion such as a pocket for accommodating various articles can be provided in this space.

  According to the invention of claim 2, the distance between the console center line passing through the center of the console box of the left console device and the driver seat center line passing through the center of the driver's seat is driven to be large at the rear side and small at the front side. It is arranged at an angle to the seat. Thereby, each console apparatus can be arranged to be inclined toward the driver's seat from the rear side toward the front side. As a result, the left console device can secure a space between the driver's seat or the left side of the cab, and can increase the size of the driver's seat, expand the work space, enhance the accommodation function, and the like.

According to invention of Claim 3, the rectangular-shaped space extended in the front and back direction by planar view can be provided between the left side part of the console box of a left console apparatus, and the left front side board of a cab. In this case, the rectangular space is different from a distorted space such as a triangle, and is a well-shaped space that is convenient to install and form various things. Thereby, the accommodation part of an article | item can be provided in the left front side board of a cab, for example.

According to the invention of claim 4 , the left console device is configured such that the console box is inclined and arranged along the left front side plate of the cab.

  Therefore, the left console device can tilt the console box along the left front side plate of the cab, so that the left console device can be disposed at a position close to the left front side plate. Alternatively, a convenient space can be provided between the left console device and the left front side plate.

  As a result, when the left console device is arranged at a position close to the left front side plate, a space can be formed around the driver's seat, so the driver's seat can be changed to a large comfortable seat, The environment can be improved. On the other hand, when an effective space is provided between the left console device and the left front side plate, an accommodating portion such as a pocket for accommodating various articles can be provided in this space.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a front view showing a rear small turning hydraulic excavator according to a first embodiment of the present invention. It is a top view which expands and shows the back small turning type hydraulic excavator which abbreviate | omitted a part of working device. It is an external appearance perspective view which expands and shows a cab, the left, the right console apparatus, etc. It is a cross-sectional view which expands and shows the arrangement | positioning relationship between a driver's seat, each console apparatus, and a cab box. It is a front view which shows a floor member, a driver's seat, a left console apparatus, etc. It is a front view of the principal part expansion which shows a partially broken left console apparatus. It is a cross-sectional view which shows the left console apparatus by a comparative example with a driver's seat, a right console apparatus, a cab box, etc. It is the cross-sectional view which looked at the arrangement | positioning relationship between the driver's seat by each 2nd Embodiment of this invention, each console apparatus, and a cab box from the same position as FIG.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a backward small swivel excavator according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 to 6 show a first embodiment of the present invention. In FIG. 1, reference numeral 1 denotes a cab specification hydraulic excavator as a rear small turning type hydraulic excavator . The hydraulic excavator 1 includes a self-propelled crawler type lower traveling body 2, an upper revolving body 3 that is turnably mounted on the lower traveling body 2 and constitutes a vehicle body together with the lower traveling body 2, and the upper revolving body A swing type working device 4 is provided on the front side of the body 3 so as to be able to swing and elevate, and performs excavation work of earth and sand.

  The working device 4 includes a boom 4A attached to a support bracket 5A of a revolving frame 5 (described later) so as to be swingable and capable of moving up and down, an arm 4B attached to a tip portion of the boom 4A so as to be able to move up and down, A bucket 4C rotatably attached to the tip of 4B, a boom cylinder 4D that moves up and down the boom 4A, an arm cylinder 4E that moves up and down the arm 4B, and a bucket cylinder 4F that rotates the bucket 4C It is comprised including. The work device 4 can be operated by extending and contracting these cylinders 4D, 4E, and 4F.

  Here, as shown in FIG. 2, the upper turning body 3 has a left and right width dimension substantially equal to the vehicle width of the lower traveling body 2 and a virtual circle of a turning radius centered on the turning center ( It is formed in a substantially circular shape in plan view so that it can be contained within (not shown). As a result, the excavator 1 is configured so that the rear surface of the counterweight 10 (described later) is substantially within the vehicle width of the lower traveling body 2 when the upper revolving body 3 turns on the lower traveling body 2 around the turning center. It is configured as a small swivel excavator. The upper swing body 3 includes a swing frame 5, a cab 12, and left and right console devices 19 and 23, which will be described later.

  Reference numeral 5 denotes a revolving frame constituting a support structure for the upper revolving structure 3. On the front side of the revolving frame 5, a support bracket 5A for supporting the work device 4 so as to be swingable in the left and right directions is provided so as to protrude to the front side.

  Reference numeral 6 denotes an engine (shown by a dotted line in FIG. 2) mounted on the rear side of the revolving frame 5. The engine 6 drives the hydraulic pump 7 and is disposed on the revolving frame 5 in a horizontally placed state extending in the left and right directions. On the other hand, on the front side of the engine 6, a hydraulic oil tank 8 and a fuel tank 9 are arranged side by side in the left and right directions, located on the right side of the turning frame 5.

  Reference numeral 10 denotes a counterweight which is located on the rear side of the engine 6 and is attached to the rear portion of the turning frame 5. The counterweight 10 balances the weight with the work device 4, and is formed in a convex curve shape with the center position of the rear surface protruding rearward.

  11 is an exterior cover provided on the revolving frame 5 from the rear side to the right side of a cab 12 described later. The exterior cover 11 covers devices such as the engine 6 mounted on the revolving frame 5.

  Reference numeral 12 denotes a cab (see FIGS. 1 and 2) provided on the left front side on the revolving frame 5. The cab 12 forms a living space for an operator who operates the excavator 1, and is formed as a pentagonal box. The cab 12 includes a floor member 13, a driver's seat 14, a cab box 16 and the like which will be described later.

  A floor member 13 serves as a base of the cab 12. As shown in FIGS. 3 and 5, the floor member 13 forms a scaffold on which an operator rides, and is formed using, for example, a steel plate. The floor member 13 is formed, for example, as a pentagonal plate in accordance with the shape of a cab box 16 described later, and the four corners of the front, rear position and left and right positions are swung via vibration-proof mounts (not shown). Mounted on the frame 5. Further, a driver seat mounting base 13A is provided near the rear side of the floor member 13, and a driver seat 14, left and right console devices 19, 23, which will be described later, are disposed on the driver seat mounting base 13A. Has been.

  A driver's seat 14 is provided on the floor member 13 for an operator to sit on. The driver's seat 14 is attached to the driver's seat mounting base 13A via a seating position adjusting device 15. Accordingly, the driver's seat 14 can be moved forward, backward, upward, and downward by the seating position adjusting device 15, and the seating position can be adjusted according to the physique and preference of the operator. On the other hand, console devices 19 and 23 (to be described later) for operating the working device 4 and the like are disposed on the left and right sides of the driver's seat 14, and in front of the driver's seat 14 are manually operated when the lower traveling body 2 is driven. A travel lever / pedal device 27 that is operated by an operation or a stepping operation is provided.

  Here, among the left and right console devices 19 and 23 disposed between the driver seat 14 and the driver seat 14, the left console device 19 is disposed at a position close to the left face plate 16 </ b> H side of the cab box 16. In this case, the distance between the left and right console devices 19 and 23 can be increased, and a large driver seat having a large width and good sitting comfort can be installed. Further, a rectangular space S2 described later is provided between the driver's seat 14 and the left console device 19 and is located on the rear side.

  Reference numeral 16 denotes a cab box provided on the floor member 13 so as to cover the periphery and the upper side of the driver's seat 14. The cab box 16 defines a driver's cab for an operator to live in, and accommodates a driver's seat 14, left and right console devices 19, 23, left and right traveling lever / pedal devices 27, and the like. It is.

  As shown in FIGS. 3 and 4, the cab box 16 includes a left front pillar 16A, a right front pillar 16B, a left rear pillar 16C, a right rear pillar 16D, and a left intermediate pillar 16E. Provided between the front plate 16F provided between the right front pillar 16B, the rear plate 16G provided between the left rear pillar 16C and the right rear pillar 16D, and the left front pillar 16A and the left rear pillar 16C. The left side plate 16H, the right side plate 16J provided between the right front pillar 16B and the right rear pillar 16D, and the top plate 16K provided on the upper end sides of the pillars 16A to 16E are formed as a covered box-like body. Has been.

  Here, the cab box 16 is arranged on the left side of the circular upper swing body 3. In this case, when the upper swing body 3 is swung, the cab box 16 is arranged so as not to protrude from the virtual circle of the turning radius drawn during the turning operation so as not to collide with surrounding obstacles. However, a large space cannot be secured in the downsized upper swing body 3 in order to install the cab 12. For this reason, in a cab box having a quadrangular shape in plan view, the installation space cannot be used effectively, and the internal living space becomes small.

  Therefore, the cab box 16 is retracted by retracting the left front pillar 16A and the left rear pillar 16C to the right side and projecting the left intermediate pillar 16E to the left side so that the left face plate 16H does not protrude greatly from the imaginary circle. The face plate 16H is formed by bending it into a mountain shape.

  As a result, the front side position of the left side plate 16H is a left front side plate 16H1 inclined rightward so as to approach the left console device 19 from the rear left intermediate pillar 16E toward the left front pillar 16A. On the other hand, the rear side position of the left side plate 16H is a left rear side plate 16H2 inclined rightward from the left intermediate pillar 16E toward the left rear pillar 16C. In this way, by folding the left face plate 16H at the front and rear intermediate portions, the cab box 16 is formed in a pentagonal shape (pentagonal columnar shape) in plan view, thereby securing an internal living space, It can fit within the virtual circle of the turning radius.

  Further, between the left front pillar 16A corresponding to the left front side plate 16H1 of the left side plate 16H and the left intermediate pillar 16E, as shown in FIG. 3, an entrance 17 is provided for the operator to get on and off the cab box 16. .

  Reference numeral 18 denotes a door provided on the left face plate 16H of the cab box 16 in order to close the entrance 17 so as to be opened and closed (see FIG. 4). The door 18 has a rear edge attached to the left intermediate pillar 16E so as to be rotatable in the horizontal direction. The door 18 is a member that actually represents the left front side plate 16H1 of the left side plate 16H, and is formed, for example, by facing and fixing the inner panel 18A and the outer panel 18B.

  Here, the door 18 forms a later-described space S1 with the left console device 19, and this space S1 is not a distorted shape like a triangle in plan view, but a rectangular shape extending in the front and rear directions ( It has a well-shaped space that is easy to use, such as a square shape. Thus, the door pocket 18C (shown by a two-dot chain line), switches (not shown), and the like can be provided on the inner panel 18A of the door 18 by using the space S1.

  Next, the left and right console devices 19 and 23 that are located in the cab 12 and are provided on both the left and right sides of the driver's seat 14 will be described.

  Reference numeral 19 denotes a left console device disposed on the left side of the driver's seat 14. The left console device 19 is close to a position where the front portion of the driver's seat 14 is sandwiched between the left console device 23 and a right console device 23 which will be described later, specifically, the door 18 of the cab box 16 (the left front side plate 16H1 of the left side plate 16H). Placed in position. The left console device 19 includes a left operation lever 20 and a left console box 22 which will be described later.

  Reference numeral 20 denotes a left operation lever that constitutes the left console device 19 together with the left console box 22. The left operation lever 20 is operated by an operator seated on the driver's seat 14 and is disposed on the left front side of the driver's seat 14 using a bracket 21 as shown in FIGS. As shown in FIG. 6, the left operation lever 20 includes a pressure reducing valve type pilot valve 20 </ b> A attached to the bracket 21 in the left console box 22, and the outside of the left console box 22 attached to the pilot valve 20 </ b> A. And a lever portion 20B protruding obliquely upward.

  Here, the pilot valve 20A has four pushers 20A1 to 20A3 (only three are shown) arranged concentrically with an angular interval of 90 °, and a disk shape that selectively presses each of the pushers 20A1 to 20A3. The lower end of the lever portion 20B is attached to the center of the cam 20A4.

  When the operator seated in the driver's seat 14 holds the lever portion 20B with his left hand and tilts the lever portion 20B forward and backward, the upper swing body 3 performs a turning operation. When the part 20B is tilted to the left or right, the arm 4B of the work device 4 performs a lifting operation.

  Reference numeral 22 denotes a left console box that accommodates the pilot valve 20 </ b> A of the left operation lever 20. As shown in FIGS. 4 and 6, the left console box 22 is formed as a hollow box having a substantially rectangular shape when viewed from above, for example, using a resin material or the like. The left console box 22 is formed of an L-shaped plate body whose front side is bent upward. Between the left and right side portions 22A and 22B facing each other in the left and right directions, and the side portions 22A and 22B. The upper surface portion 22C covers the upper side, and the lower surface portion 22D covers the lower side from the front side between the side surface portions 22A and 22B.

  Here, as shown in FIG. 4, the left console box 22 of the left console device 19 is disposed so as to be tilted to the right side where the front side is the driver's seat 14 side by rotating clockwise in a plan view. Specifically, a straight line extending forward and rearward through the left and right centers of the driver's seat 14 is defined as a driver's seat center line AA, and the center of the left console box 22 in the width direction (upper surface portion 22C). Assuming that the straight line extending in the longitudinal direction through the left console center line BB is the left console center line BB, the angle α1 on the right side with respect to the straight line A′-A ′ parallel to the driver center line AA. It is only tilted clockwise. In this case, the inclination angle α1 is, for example, about 3 ° to 15 °, preferably about 6 ° to 10 °.

  Accordingly, the distance R1 between the rear side of the left console center line BB of the left console box 22 and the driver seat center line AA is large, and the front side of the left console center line BB of the left console box 22 is large. And the distance dimension F1 between the driver's seat center line AA is set small (F1 <R1).

  In this way, the left console box 22 is arranged in the right and left directions so that the distance from the driver's seat center line A-A is large on the rear side and small on the front side. The front left side plate 16H1 of the left side plate 16H of the cab box 16 facing the outside, that is, the inner side panel 18A of the door 18 can be arranged substantially in parallel.

  Accordingly, a rectangular space S1 extending forward and rearward in a plan view can be provided between the left side surface portion 22A of the left console box 22 and the inner surface panel 18A of the door 18, and the rear portion of the left console box 22 and the driving can be operated. A rectangular space S <b> 2 (illustrated by a lattice pattern in FIG. 4) can be provided between the seat 14.

  As a result, when the left side surface portion 22A is disposed close to the inner surface panel 18A of the door 18 using the space S1, the distance between the left and right console devices 19, 23 can be increased. The driver seat 14 can be enlarged and the work space can be expanded. In addition, since the left console device 19 has a wide left and right spacing with respect to the driver seat 14 on the rear side of the driver seat 14, the operator can sit down on the driver seat 14 with a margin.

  On the other hand, the rectangular space S1 extending in the front and rear directions in a plan view is an easy-to-use space. Therefore, the space S1 is used to open the door pocket 18C (two points in FIG. 4) on the inner panel 18A of the door 18. (Shown with a chain line) or various switches (not shown) can be attached. Furthermore, in the space S2 provided between the rear portion of the left console box 22 and the driver's seat 14, a storage case (not shown) for storing items used by the operator, for example, beverage containers, lunch boxes and the like can be provided. .

  Reference numeral 23 denotes a right console device disposed on the right side of the driver's seat 14. The right console device 23 is spaced from the entrance 17 of the cab box 16 and is disposed at a position close to the right face plate 16J. The right console device 23 includes a right operation lever 24 and a right console box 25 which will be described later.

  Reference numeral 24 denotes a right operation lever that constitutes the right console device 23 together with the right console box 25. The right operation lever 24 is disposed on the right front side of the driver's seat 14 using a bracket (not shown), and is operated by an operator seated on the driver's seat 14. The right operation lever 24 includes a pressure reducing valve type pilot valve (not shown) and a lever portion 24A that is attached to the pilot valve and protrudes obliquely upward to the outside of the right console box 25 in substantially the same manner as the left operation lever 20. It is comprised by.

  When the operator seated in the driver's seat 14 grips the lever portion 24A with the right hand and tilts the lever portion 24A forward and backward, the boom 4A of the work device 4 performs a raising / lowering operation. When the lever portion 24A is tilted to the left or right, the bucket 4C of the work device 4 performs a rotating operation.

  Reference numeral 25 denotes a right console box that accommodates the pilot valve of the right operation lever 24. The right console box 25 is formed using a resin material or the like in substantially the same manner as the left console box 22, and has a substantially rectangular shape when viewed from above. It is configured as a hollow box. Here, the right console box 25 is different from the left console box 22 of the left console device 19, and the right console center line CC extending in the longitudinal direction through the center in the width direction of the right console box 25 is a driver's seat. It is arranged substantially parallel to the center line AA.

  Reference numeral 26 denotes a gate lock lever provided in the left console device 19, and the gate lock lever 26 is supported at its base end so as to be rotatable in the left console box 22, and is used to block the entrance / exit 17 of the cab box 16. It is rotationally displaced between the restriction position and the entry / exit permission position for opening the entrance 17. When the gate lock lever 26 is set to the boarding / unloading restriction position, each hydraulic actuator of the hydraulic excavator 1 can be operated. Operation can be prohibited.

  A left and right traveling lever / pedal device 27 is provided in front of the driver's seat 14 and provided on the front side of the floor member 13. The travel lever / pedal device 27 is operated when the lower traveling body 2 is traveled.

  The hydraulic excavator 1 according to the first embodiment has the above-described configuration. Next, the operation of the hydraulic excavator 1 will be described.

  First, the operator opens the door 18 of the cab 12, gets into the cab box 16 through the entrance 17 and then sits on the driver's seat 14. In this state, the operator can cause the excavator 1 to travel to the work site by operating the left and right traveling lever / pedal devices 27. On the other hand, at the work site, the operator tilts the lever portion 20B of the left operation lever 20 and tilts the lever portion 24A of the right operation lever 24, thereby turning the upper swing body 3 and turning the work device. 4 can be operated to perform excavation work of earth and sand.

  Here, in the rear ultra-small turning type hydraulic excavator 1, the cab 12 is also reduced in size with the downsizing of the upper turning body 3, so that the driver's seat 14, each console device 19, 23, etc. The space for arranging is also narrowed. That is, the cab box 16 constituting the cab 12 has a left front pillar 16A, a right front pillar 16B, a left rear pillar 16C, a right rear pillar 16D, and a left middle pillar 16E, and the space between the left front pillar 16A and the right front pillar 16B is the front. A face plate 16F is formed between the left rear pillar 16C and the right rear pillar 16D as a rear face plate 16G, and a space between the left front pillar 16A and the left rear pillar 16C is a left face plate 16H between the right front pillar 16B and the right rear pillar 16D. Is a right-side plate 16J, and is formed as a covered box-like body in which the upper ends of the pillars 16A to 16E are the top plate 16K.

  Further, the cab box 16 has a left face plate 16H formed in a mountain shape, and a left portion between the left front pillar 16A and the left intermediate pillar 16E, which is the front side position of the left face plate 16H, is directed from the left intermediate pillar 16E toward the left front pillar 16A. The front left side plate 16H1 is inclined so as to approach the console device 19. Thereby, the cab box 16 is formed in the pentagon shape by planar view.

  However, according to the first embodiment, the left console device 19 of the left and right console devices 19 and 23 in the plan view seen from above the cab 12 is in the left and right directions with respect to the driver's seat 14. The intervals are inclined so as to be wide at the rear side of the driver's seat 14 and narrow at the front side. Specifically, when the straight line extending forward and rearward through the center of the driver's seat 14 is a driver's seat center line AA, the left console device 19 has a length extending through the center of the left console box 22. The distance between the console center line BB extending in the direction and the driver center line AA is set to a large distance dimension R1 on the rear side and a small distance dimension F1 on the front side. Line BB) is arranged obliquely with respect to the driver's seat 14 (driver's seat center line AA).

  Therefore, when the left front side plate 16H1 inclined rightward so as to approach the left console device 19 from the left intermediate pillar 16E toward the left front pillar 16A is provided at the front side position of the left side plate 16H constituting the cab box 16 of the cab 12. However, the left console device 19 can be arranged with its left console box 22 inclined at an inclination angle α1 along the left front side plate 16H1.

  Thus, the left console device 19 can tilt the left console box 22 in substantially the same direction (angle) as the left front side plate 16H1 (door 18) of the left side plate 16H. A rectangular space S1 extending forward and rearward in a plan view can be provided between the inner panel 18A of the door 18 and the rectangular space S2 between the rear portion of the left console box 22 and the driver's seat 14. Can be provided.

  As a result, when the left console device 19 is brought close to the door 18 that forms the left front side plate 16H1 and the left console device 19 is arranged away from the driver seat 14, a space can be formed around the driver seat 14. it can. As a result, a large comfortable seat can be used as the driver's seat 14, and the work space can be enlarged, so that the work environment can be improved. Further, since the left console device 19 is inclined with respect to the driver's seat 14 so that the rear space dimension R1 is larger than the front space dimension F1, a space is provided around the waist when the operator is seated. The working environment can be improved.

  On the other hand, in a state where the left console device 19 is inclined at an angle α1 and effective spaces S1 and S2 that are easy to use are provided between the left console device 19 and the door 18, the inner surface of the door 18 is utilized using the space S1. The door pocket 18C can be provided on the panel 18A, and the accommodation function can be enhanced. Furthermore, in the spaces S1 and S2, a storage case for storing various switches and items used by the operator, for example, beverage containers, lunch boxes and the like can be provided.

  Next, a comparison between the left console device 19 according to the present embodiment shown in FIG. 4 and the left console device 119 according to the comparative example shown in FIG. 7 will be described.

  First, the left console device 119 according to the comparative example includes a left operation lever 120, a bracket 121, and a left console box 122 similar to those of the left console device 19 according to the present embodiment.

  Here, the left console box 122 constituting the left console device 119 according to the comparative example passes through the center of the driver's seat 14 along the left console center line DD extending in the length direction through the center of the left console box 122. The driver seat center line AA extending in the front and rear directions is arranged in parallel. That is, the distance R2 between the rear side of the left console center line DD of the left console box 122 and the driver center line AA, the front side of the left console center line DD of the left console box 122 and the driving. The distance dimension F2 from the seat center line A-A is set to be approximately equal (R2 = F2).

  Thus, since the left console device 119 according to the comparative example is arranged in parallel with the driver's seat 14, the left console box 122 is placed on the left front side plate 16H1 (door 18) of the left side plate 16H constituting the cab box 16. On the other hand, it is arranged so that the distance dimension is large on the rear side and the distance dimension is small on the front side. For this reason, in the left console device 119 according to the comparative example, the left front portion of the left console box 122 approaches the inner panel 18A of the door 18 that becomes the left front side plate 16H1 of the left side plate 16H.

  As a result, since the left console device 119 cannot be disposed away from the driver's seat 14, the size of the driver's seat 14 is limited to a small one, and the seating posture becomes tight and the working environment is deteriorated. The problem arises. Moreover, the space S3 (shown in a lattice pattern in FIG. 7) between the left console device 119 and the left front side plate 16H1 (door 18) arranged straight in the front and rear directions is a distorted triangular shape. It is difficult to use effectively. Furthermore, a space S4 (shown by a lattice pattern in FIG. 7) between the rear portion of the left console box 122 and the driver's seat 14 is also small and unusable.

  On the other hand, the left console device 19 according to the present embodiment is arranged to be inclined at an inclination angle α1 so that the distance in the left and right directions with respect to the driver seat 14 is wide at the rear side of the driver seat 14 and narrowed at the front side. ing. Thus, unlike the left console device 119 according to the comparative example, the left console device 19 can be inclined at substantially the same angle as the left front side plate 16H1 of the left side plate 16H of the cab box 16, that is, the door 18.

  As a result, the size of the driver's seat 14 can be increased, the work space and the seating space can be increased, and the work environment can be improved. On the other hand, between the left console device 19 and the left front side plate 16H1, a rectangular space S1 (shown in a lattice pattern in FIG. 4) extending in the front and rear directions in a plan view can be provided. Further, a large space S2 (shown in a lattice pattern in FIG. 4) can be provided between the rear portion of the left console box 22 and the driver's seat 14.

  Next, FIG. 8 shows a second embodiment of the present invention. The feature of the present embodiment is that the right console device is arranged so as to be inclined so that the distance in the left and right directions with respect to the driver's seat is wide on the rear side of the driver's seat and narrows on the front side. In the present embodiment, the same components as those in the first embodiment described above are denoted by the same reference numerals, and the description thereof is omitted.

  In FIG. 8, 31 is the right console device according to the second embodiment, and the right console device 31 is substantially the same as the right console device 23 according to the first embodiment, and the right operation lever 32 and the right console box 33. It is comprised by. However, the right console device 31 according to the second embodiment is arranged such that the right console box 33 is inclined to the left side so as to approach the driver's seat 14 from the rear side toward the front side. This is different from the right console device 23 according to the form.

  That is, in the right console device 31 according to the second embodiment, when a straight line extending in the longitudinal direction through the center of the right console box 33 is a right console center line EE, the right console center line EE is The driver seat is inclined to the left side by an angle α2 with respect to a straight line A′-A ′ parallel to the driver seat center line AA. In this case, the inclination angle α2 is, for example, about 3 ° to 15 °, preferably about 6 ° to 10 °, like the inclination angle α1 described above.

  Accordingly, the distance R3 between the rear side of the right console center line EE of the right console box 33 and the driver seat center line AA is large, and the front side of the right console center line EE of the right console box 33 is large. And the distance dimension F3 between the driver's seat center line A-A is set small (F3 <R3).

  Thus, also in the second embodiment configured as described above, the same operations and effects as those of the first embodiment described above can be obtained. In particular, in the second embodiment, in addition to the left console device 19, the right console device 31 is also tilted, so that the left and right operability can be made equal. In addition, since the rear side of the left console device 19 is largely separated from the driver's seat 14 with the spacing dimension R1, and the rear side of the right console device 31 is largely separated from the driver's seat 14 with the spacing dimension R3, the operator has a large margin. Can sit down on the driver's seat 14.

  In the first embodiment, when the lever portion 20B of the left operation lever 20 is tilted forward and backward, the upper swing body 3 performs a swing operation, and the lever portion 20B is tilted left and right. When the rolling operation is performed, the arm 4B of the work device 4 performs a lifting operation. On the other hand, when the lever portion 24A of the right operation lever 24 is tilted forward and backward, the boom 4A of the work device 4 performs a lifting operation, and when the lever portion 24A is tilted left and right, It has been described that the bucket 4C of the device 4 performs a rotating operation. However, the present invention is not limited to this, and the operation mode using the left operation lever and the right operation lever is not limited to the combination described above, and can be changed according to the preference of the operator. This configuration can be similarly applied to the second embodiment.

  In each embodiment, the case where the engine 6 is mounted on the turning frame 5 has been described as an example. However, the present invention is not limited to this. For example, an electric motor may be used in place of the engine 6, and further, a hybrid prime mover using both the electric motor and the engine may be used.

  In each embodiment, the case where it applies to the hydraulic excavator 1 provided with the swing type working device 4 is illustrated. However, the present invention is not limited to this, and can be applied to, for example, a hydraulic excavator provided with an offset working device or a hydraulic excavator provided with a mono-boom working device that does not perform a swing operation or an offset operation.

  Furthermore, in each embodiment, the hydraulic excavator 1 is illustrated as a construction machine. However, the present invention is not limited to this, and can be widely applied to other construction machines such as a hydraulic crane.

1 Excavator (construction machine)
2 Lower traveling body (car body)
3 Upper swing body (car body)
4 working device 12 cab 13 floor member 14 driver's seat 16 cab box 16F front panel 16G rear panel 16H left panel 16H1 left front panel 16H2 left rear panel 16J right panel 16K top panel 17 entrance / exit 18 door 18A inner panel 18C outer panel 18C Door pocket 19 Left console device 20 Left operation lever 20A Pilot valve 20B, 24A Lever 22 Left console box 23, 31 Right console device 24, 32 Right operation lever 25, 33 Right console box AA Driver's seat center line BB Left console center line EE Right console center line α1, α2 Tilt angle R1, R3 Rear spacing dimension F1, F3 Front spacing dimension S1, S2 Rectangular space

Claims (4)

A self-propelled lower traveling body, an upper revolving body mounted on the lower traveling body so as to be able to swivel, and a work device provided on the upper revolving body so as to be able to be raised and lowered,
The upper swing body has a width dimension in the left and right directions that is substantially equal to the vehicle width of the lower travel body, and fits within a virtual circle with a turn radius centered on the turn center, and turns on the lower travel body and the rear surface of the counterweight is formed to fit within the vehicle width of the lower traveling body when the,
The upper swivel body includes a swivel frame forming a support structure, a cab provided on the front side of the swivel frame and having a driver seat on which an operator is seated forward, and the driver seat positioned in the cab. across the left, left provided on the right sides, and a right console device,
The left and right of the console device, before, left consisting box body extending rearward, and right console boxes, the operation for operating the working device mounted on the front side of the left and right console box In a small rear turning type hydraulic excavator constituted by left and right operation levers having lever portions operated by an operator seated on the seat,
The cab has a front plate, a rear plate, a left front side plate, a left rear side plate, a right side plate, a top plate so as not to protrude from a virtual circle of the turning radius when the upper swing body is swung. It is formed as a pentagonal box by the face plate,
In a plan view seen from above the cab, at least the left console box of the left console device among the left and right console devices has a left and right spacing with respect to the driver seat on the rear side of the driver seat. widely inclined to to be narrower at the front side a structure that will be disposed,
The left console box of the left console device is formed as a hollow box having a rectangular shape when viewed from above, and covers the left and right side portions facing each other in the left and right directions and the upper side between the side portions. and it has a top portion,
Left front side plate of the cab, the left side position facing the left side surface of the left console box on the left console device, which is inclined to approach the left console box toward the front side from the rear side,
Left side portion of the left console box, a hydraulic excavator of the rear small swing radius type, characterized in that it has a structure that will be disposed inclined so as to extend in parallel along a said left front side plate of the cab. When a straight line extending forward and backward through the center of the driver seat is a driver seat center line, at least the left console device has a console center line extending in the length direction of the left console box and the driver seat center. excavator backward small swing radius type according to claim 1 comprising the spacing dimension between the lines, a configuration that will be disposed at an angle relative to the driver's seat to be smaller in larger front at the rear side. Between the left front side plate of the cab which faces the left side portion and the left side surface of the left console box of the left console device, the front in plan view, made as a rectangular space extending backward is that provided The rear small turning type hydraulic excavator according to claim 1 or 2. The left console device, a hydraulic excavator of the rear small swing radius type according to claim 1 or 2 comprising a structure in which the left console box Ru disposed inclined along a said left front side plate of the cab.

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