JP2016037822A - Construction machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve stability and operability by lowering an eye point by arranging a floor member at a low position while taking into consideration a larger diameter of a hydraulic hose and easiness in insertion and extraction of a connection pin.SOLUTION: A left front vertical plate 7 as one vertical plate of a swivel frame 5 is provided with a hose insertion hole 7B through which a plurality of hydraulic hoses 37 extending from a control valve device 36 are run toward respective cylinders 4H-4K constituting a hydraulic actuator of a work device 4. A floor member 26 is formed thereupon of a foot placing region 27 located in front of a driver's seat 31 and used by an operator to place his or her foot, a raised region 28 connecting with the foot placing region 27 and provided at a position nearby the left front vertical plate 7. The raised region 28 extends from a border position 29 between the foot placing region 27 and the raised region 28 to the left front vertical plate 7 toward an upper position 7B1 of the hose insertion hole 7B.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a construction machine such as a hydraulic excavator provided with a work device on the front side of a revolving frame, for example.

  In general, a construction machine such as a hydraulic excavator has a self-propelled lower traveling body, an upper revolving body that is turnably mounted on the lower traveling body, and a hydraulic actuator on the front side of the upper revolving body as a power source. It is comprised by the working apparatus provided so that movement was possible.

  The upper revolving unit is installed on the bottom plate attached to the lower traveling unit, and is erected on the bottom plate so as to extend forward and rearward at intervals in the left and right directions, and for attaching the working device to the front position in the front and rear directions. A revolving frame consisting of left and right vertical plates having work device attachment portions, and a horizontally placed state extending leftward and rightward on the revolving frame, located behind the work device attachment portions. A floor member provided on the front side of the prime mover and located on the left and right outside of the left vertical plate among the left and right vertical plates constituting the revolving frame; A driver seat pedestal that stands from the rear side of the floor member and extends to the rear side so as to cover the prime mover and is provided with a driver seat on which an operator is seated on the upper side of the floor member; Provided on the frame; And a control valve device connected via a pressure actuator and a plurality of hydraulic hoses (e.g., see Patent Document 1).

JP 2010-150813 A

  Here, each hydraulic hose connecting the control valve device and the hydraulic actuator of the working device is desired to reduce the pressure loss when circulating the pressure oil. Accordingly, a thick hose having a large diameter dimension (inner diameter dimension of the flow path) is used for each hydraulic hose. When a plurality of thick hydraulic hoses are arranged on the lower side of the floor member, the floor member must be arranged at a high position with respect to the turning frame in order to avoid the hydraulic hoses. However, when the floor member is disposed at a high position, the eyepoint when the operator is seated on the driver's seat is increased, and the sense of stability is impaired, and the size of the hydraulic excavator is increased.

  On the other hand, the revolving frame is provided with a support bracket at a front position between the vertical plates, and a hydraulic actuator (hydraulic cylinder) for operating the working device can be rotated by using a connecting pin. Installed. In this case, since the floor member is disposed on the left side of the support bracket, the connecting pin is configured to be inserted / removed from the support bracket to the right in the left and right directions.

  As described above, in the structure in which the connecting pin is inserted / removed to the right side from the support bracket, there is a possibility that a member disposed on the right side of the right vertical plate, for example, an oil storage tank, a box body such as a tool box, interferes with the connecting pin to be inserted / removed. There is. For this reason, oil storage tanks, tool boxes, and the like are restricted by their shapes and arrangement locations so as not to obstruct the connection / removal operation of the connecting pins. Thereby, in order to ensure the capacity | capacitances, such as an oil storage tank and a tool box, these will enlarge.

  Therefore, it is conceivable to allow the connecting pin to be inserted and removed from the support bracket to the left side (floor member side). In this case, it is necessary to increase the position of the floor member to avoid interference with the connecting pin and allow the connecting pin to move. However, as described above, when the floor member is arranged at a high position, there is a problem that not only the eye point when sitting on the driver's seat is increased, but also the hydraulic excavator is enlarged.

  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 allow the floor member to be disposed at a low position in view of increasing the diameter of the hydraulic hose and ease of inserting and removing the connecting pin. It is to provide a construction machine that can improve the stability and operability by lowering the eye point.

  A construction machine according to the present invention is capable of a self-propelled lower traveling body, an upper revolving body that is turnably mounted on the lower traveling body, and a vertical actuator that can move up and down using a hydraulic actuator as a power source on the front side of the upper revolving body. The upper revolving unit is provided with a bottom plate attached to the lower traveling unit, and on the bottom plate, it is erected by extending in the left and right directions with an interval in the front and rear directions and in the front and rear directions. A swivel frame comprising left and right vertical plates having work device mounting portions for mounting the work device at a front position, and left and right on the swivel frame positioned rearward of the work device mounting portions. A front side of the prime mover that is positioned outside the left and right sides of one of the left and right vertical plates constituting the revolving frame and the prime mover arranged in a horizontally extending state extending in a direction Floor members provided on the floor and the floor A driver seat pedestal provided with a driver seat that rises from the rear side of the member and extends to the rear side so as to cover the prime mover and on which an operator is seated, and is positioned below the floor member and on the swivel frame And a control valve device connected to the hydraulic actuator of the working device via a plurality of hydraulic hoses.

  In order to solve the above-described problem, the feature of the configuration adopted by the invention of claim 1 is that one of the left and right vertical plates of the swivel frame extends from the control valve device to the one vertical plate. A hose insertion hole is provided for inserting each hydraulic hose toward the hydraulic actuator of the working device, and the floor member is positioned in front of the driver's seat and a footrest portion on which an operator places a foot, and the foot A rising portion provided in the vicinity of the one vertical plate in a continuous manner with the mounting portion, and the rising portion rises from a boundary position between the foot mounting portion and the rising portion and passes through the hose. The present invention is configured to extend to the one vertical plate toward the upper position of the hole.

  According to a second aspect of the present invention, a horizontal plate is provided between the left and right vertical plates of the swivel frame so as to extend in the left and right directions and connect the vertical plates, and the working device is provided on the horizontal plate. A support bracket is provided on the front side of the mounting part and supports the hydraulic actuator using a connection pin. The rising part of the floor member is inserted and removed from the support bracket to the floor member side. In some cases, the position allowing the movement of the connecting pin is configured as the boundary position.

  The invention according to claim 3 is that the rising portion of the floor member is formed so as to extend forward and rearward along the one vertical plate.

  According to the first aspect of the present invention, each hydraulic hose extending from the control valve device on the swing frame can be connected to the hydraulic actuator of the working device by being inserted into the hose insertion hole provided in one vertical plate. it can. In this case, the plurality of hydraulic hoses extend obliquely upward from the control valve device disposed on the lower side of the floor member toward the working device at a position where the plurality of hydraulic hoses are inserted into the hose insertion holes. Thus, when each hydraulic hose is routed, there is a possibility of interfering with the floor member in the vicinity of one vertical plate.

  On the other hand, the floor member is provided with a rising portion at a position in the vicinity of one vertical plate that is continuous with the footrest portion, unlike a flat footrest portion on which the operator puts a foot. The rising portion rises from the boundary position with the footrest portion and extends to one vertical plate toward the upper position of the hose insertion hole. Therefore, for example, even when each hydraulic hose has a large diameter, the rising portion can be avoided by the rising structure, and the footrest portion can be arranged at a low position.

  As a result, the driver's seat can be arranged at a low position in accordance with the footrest portion of the low floor member. As a result, the eyepoint when the operator is seated on the driver's seat can be lowered, so that stability and operability can be improved, and the height of the construction machine can be reduced and the size can be reduced.

  According to the invention of claim 2, the revolving frame is provided with the support bracket located on the front side of the work device mounting portion of each vertical plate. A hydraulic actuator can be attached to the support bracket using a connecting pin. In this case, the rising portion of the floor member has a boundary position that allows the movement of the connecting pin even when the connecting pin is inserted into and removed from the support bracket.

  As a result, even in a structure in which the connecting pin can be easily inserted and removed, the footrest portion of the floor member can be lowered to place the driver's seat in a low position, and the eyepoint when sitting on the driver's seat is lowered. can do.

  Moreover, since the connecting pin can be inserted into and removed from the floor member side, a member provided on the opposite side across each vertical plate, such as an oil storage tank, a tool box, etc. has a space for allowing the connecting pin to move. There is no need to restrict the shape and arrangement to ensure Thereby, an oil storage tank, a tool box, etc. can enlarge the internal capacity | capacitance efficiently. As a result, the oil storage tank, the tool box, and the like are not restricted by the shape and the arrangement location, so that the degree of design freedom can be increased and the construction machine can be downsized.

  According to the invention of claim 3, since the rising part of the floor member is formed so as to extend forward and rearward along one vertical plate, the rising part is when the foot is placed on the footrest part. It can be placed in a position that does not get in the way.

1 is a front view showing a canopy-spec hydraulic excavator applied to a first embodiment of the present invention. FIG. It is a perspective view which expands and shows a turning frame, a floor member, a driver's seat base, a driver's seat, a control valve device, a canopy, and the like. It is a perspective view which shows a single turning frame. It is a front view which shows a single turning frame. It is a left view which shows the arrangement | positioning relationship between a hydraulic hose and a floor member from the front side of a turning frame. It is a left view which shows the arrangement | positioning relationship between the insertion / extraction operation | movement of a cylinder connection pin, and a floor member from the same position as FIG. It is a perspective view which shows a turning frame, a floor member, a driver's seat base, a driver's seat, a control valve device, etc. It is a disassembled perspective view which shows the state which isolate | separated the floor member etc. from the turning frame with a driver's seat base, a driver's seat, a control valve apparatus, a hydraulic hose, etc. It is a perspective view which shows the floor member by the 2nd Embodiment of this invention independently. It is sectional drawing which looked at the floor member from the arrow XX direction in FIG. It is a perspective view which shows the floor member by the 3rd Embodiment of this invention alone. It is sectional drawing which looked at the floor member from the arrow XII-XII direction in FIG. It is a perspective view which shows the floor member by the modification of this invention alone.

  Hereinafter, as a typical example of a construction machine according to an embodiment of the present invention, a crawler type small hydraulic excavator, a so-called mini excavator will be described as an example, and a detailed description will be given with reference to the accompanying drawings.

  1 to 8 show a first embodiment of the present invention. In FIG. 1, reference numeral 1 denotes a crawler type small hydraulic excavator (mini excavator) as a construction machine. 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 front and rear front sides of the upper revolving body 3. And an offset type work device 4 that performs excavation work of earth and sand using a plurality of hydraulic actuators as a power source.

  The work device 4 is lifted on work device attachment portions 7A and 8A of the left and right front vertical plates 7 and 8 that constitute a revolving frame 5 described later by a foot portion 4A1 on the base end side (see FIGS. 5 and 7). A lower boom 4A that is movably mounted, an upper boom 4B that is swingably swingable in the left and right directions on the distal end side of the lower boom 4A, and a swinger that is swingable in the left and right directions on the distal end side of the upper boom 4B The arm support member 4C, the arm 4D rotatably attached to the distal end side of the arm support member 4C, the bucket 4E rotatably attached to the distal end side of the arm 4D, and the lower boom 4A. A link 4F that connects between the arm support member 4C and a boom cylinder 4G, an offset cylinder 4H, an arm cylinder 4J, and a bucket cylinder 4K that are hydraulic actuators. That.

  Each of the cylinders 4G to 4K is connected to a control valve device 36, which will be described later, via a hydraulic pipe (not shown), a hydraulic hose 37, and the like. Thereby, each cylinder 4G-4K is expanded and contracted by the pressure oil supplied from the control valve device 36. Then, the working device 4 extends and contracts the offset cylinder 4H to move the arm 4D in the left and right directions relative to the lower boom 4A, and in this state, moves the arm 4D and the bucket 4E while raising and lowering the lower boom 4A. By rotating, excavation work such as a gutter is performed.

  Here, of the cylinders 4G to 4K, for example, the boom cylinder 4G includes a bottomed cylindrical tube 4G1, a piston (not shown) slidably inserted into the tube 4G1, and the piston. It is configured to include a rod 4G2 projecting from the tube 4G1 so as to extend and contract in a connected state. The boom cylinder 4G is attached so that the base end side (bottom side) of the tube 4G1 can be rotated using a cylinder connecting pin 15 to a support bracket 14 of the revolving frame 5 described later. On the other hand, the distal end side of the rod 4G2 is rotatably attached to the distal end side of the lower boom 4A.

  Reference numeral 5 denotes a turning frame which forms a support structure for the upper turning body 3 and is attached to the lower traveling body 2. The swivel frame 5 is formed in a circular shape in a plan view so that the swivel frame 5 is substantially within the vehicle width of the lower traveling body 2 when the swivel operation is performed.

  As shown in FIGS. 3 and 4, the swivel frame 5 is provided with a flat bottom plate 6 extending in the front and rear directions, and standing on the bottom plate 6 extending in the front and rear directions with a spacing in the left and right directions. Left front vertical plate 7, right front vertical plate 8, boom connecting pin 9 for attaching the working device 4 to each front vertical plate 7, 8, and left and right at the front and rear intermediate portions of the bottom plate 6. A partition vertical plate 10 extending in the direction and a left rear vertical plate 11 positioned on the rear side of the bottom plate 6 so as to extend in the left and right left positions forward and rearward. Between the left front vertical plate 12 and the right front vertical plate 8, which is located on the rear side of the bottom plate 6 and is erected so as to extend in the left and right directions on the right side and forward and rearward. And a pair of support brackets that are provided on the front side of the horizontal plate 13 and support the tube 4G1 of the boom cylinder 4G. 14, a cylinder connecting pin 15 for attaching the boom cylinder 4G to the support bracket 14, and a plurality of overhangs extending from the bottom plate 6 and the left and right front vertical plates 7 and 8 outward in the left and right directions. A beam 16, a left side frame 17 attached to the left side of the bottom plate 6, the left front vertical plate 7 and the left rear vertical plate 11 via an extended beam 16, the bottom plate 6, the right front vertical plate 8 and the right rear vertical plate 12. A right side frame 18 attached to the right side of the left side via an extended beam 16, and a floor support frame 19 erected to extend left and right at the front position on the left side.

  The bottom plate 6 serves as a base of the revolving frame 5 and is formed in a substantially rectangular shape extending in the front and rear directions using, for example, a thick steel plate. A mounting base 6A for mounting an engine 23 and a counterweight 25, which will be described later, is provided at the rear portion of the bottom plate 6 so as to extend in the left and right directions.

  The left front vertical plate 7 is located on the front side of the bottom plate 6 and is erected so as to extend in the front and rear directions at a substantially central position in the left and right directions. On the other hand, the right front vertical plate 8 is erected so as to extend in the front and rear directions at the right position in the left and right directions of the bottom plate 6 so as to be parallel to the left front vertical plate 7. The left and right front vertical plates 7 and 8 are formed with mountain-shaped working device attachment portions 7A and 8A by projecting the front and rear front portions upward, respectively. In order to attach the foot part 4A1 of the lower boom 4A of the work device 4 to the left and right work device attachment portions 7A and 8A using the boom connection pin 9, a pin hole 7A1 into which the boom connection pin 9 is inserted. , 8A1 are formed.

  Here, the left front vertical plate 7 serving as one vertical plate is provided with a hose insertion hole 7B located on the front side of the work device mounting portion 7A. The hose insertion hole 7B is formed as an opening through which each hydraulic hose 37 extending from a control valve device 36 described later is inserted toward each cylinder 4H, 4J, 4K of the work device 4. The hose insertion hole 7B is formed as a sufficiently large circular hole so that a plurality of, for example, six or more hydraulic hoses 37 can be inserted. Further, as shown in FIGS. 4 and 5, the hose insertion hole 7B is disposed on the upper front portion of the horizontal plate 13, and the upper position 7B1 from the vicinity of the center of the hose insertion hole 7B is a floor support frame 19, that is, a floor member 26 described later. The opening is located above the footrest portion 27.

  The hose insertion hole 7B formed in this way is arranged between the control valve device 36 disposed at a low position of the turning frame 5 and the lower boom 4A disposed at a high position. Therefore, each hydraulic hose 37 extends so as to incline upward from the left side to the right side in the vicinity of the hose insertion hole 7B.

  The partition vertical plate 10 is erected so as to extend in the left and right directions at the front and rear intermediate portions of the bottom plate 6, specifically, at the rear end positions of the front vertical plates 7 and 8. The partition vertical plate 10 partitions an engine 23 and a control valve device 36, which will be described later, and supports the rear side of a floor member 26, which will be described later.

  The left rear vertical plate 11 is located on the rear side of the bottom plate 6 (the rear side with respect to the partition vertical plate 10), and is erected so as to extend in the left and right left positions in the front and rear directions. On the other hand, the right rear vertical plate 12 is erected so as to extend in the front and rear directions at the right and left positions of the bottom plate 6 so as to be parallel to the left rear vertical plate 11.

  The horizontal plate 13 extends between the left and right front vertical plates 7 and 8 in the left and right directions, and connects the front vertical plates 7 and 8. The horizontal plate 13 includes a front surface portion 13A extending upward from the front portion of the bottom plate 6, a slope portion 13B extending obliquely from the upper portion of the front surface portion 13A to the rear side, and a partition vertical from the upper portion of the slope portion 13B. The upper surface portion 13 </ b> C extending rearward toward the upper portion of the plate 10 is formed in a substantially L shape. The horizontal plate 13 has left and right end edges fixed to the left and right front vertical plates 7 and 8 using welding means or the like, and a rear end edge fixed to the partition vertical plate 10. The horizontal plate 13 has a structure that avoids the hose insertion hole 7B of the left front vertical plate 7 by the slope portion 13B.

  The support bracket 14 has a pin hole 14 </ b> A and is provided from the front surface portion 13 </ b> A to the slope portion 13 </ b> B of the horizontal plate 13. The support bracket 14 is positioned in front of the work device attachment portions 7A and 8A and supports the tube 4G1 of the boom cylinder 4G using the cylinder connecting pin 15 so as to be rotatable.

  Here, the cylinder connecting pin 15 is configured to be inserted into and removed from the pin hole 14A of the support bracket 14 from the left in the left and right directions on the floor member 26 side. In this case, since the rising portion 28 is provided in the floor member 26, the cylinder connecting pin 15 can be easily inserted and removed without being obstructed by the floor member 26, as shown in FIG. The cylinder connection pin 15 is provided with a flange 15A for stopping rotation at one end in the axial direction. The rising portion 28 is set in size, angle, etc. in consideration of the flange 15A. .

  The left side frame 17 is attached to the left side of the bottom plate 6, the left front vertical plate 7, and the left rear vertical plate 11 via an extended beam 16. The left side frame 17 is located at the front end of the revolving frame 5 and extends in the left and right directions, and the left frame portion extends in an arc from the left end of the front frame portion 17A to the rear side. 17B.

  The right side frame 18 is attached to the right side of the bottom plate 6, the right front vertical plate 8, and the right rear vertical plate 12 via an extended beam 16. The right side frame 18 is located at the front end portion of the revolving frame 5 and extends to the left and right in the same manner as the left side frame 17, and from the right end of the front frame portion 18A to the rear side. And a right frame portion 18B extending in an arcuate direction.

  The floor support frame 19 is provided on the front frame portion 17A of the left side frame 17 so as to extend upward. A front end portion of a floor member 26 to be described later is attached to the floor support frame 19 using means such as bolting.

  Reference numeral 20 denotes a left extension plate extending forward from the left front vertical plate 7, and the front portion of the left extension plate 20 reaches the front frame portion 17 </ b> A of the left side frame 17. As shown in FIG. 4, the left extension plate 20 is provided with an opening 20 </ b> A through which the cylinder connecting pin 15 can be passed when the cylinder connecting pin 15 is inserted into and removed from the pin hole 14 </ b> A of the support bracket 14. Yes.

  Reference numeral 21 denotes a right extension plate extending forward from the right front vertical plate 8. As shown in FIG. 8, reference numeral 22 denotes an under cover provided between the bottom plate 6 and the left side frame 17, and the under cover 22 also serves as a mounting table for the control valve device 36.

  Reference numeral 23 denotes an engine as a prime mover provided on the revolving frame 5 at the rear side of the work device mounting portions 7A and 8A of the left and right front vertical plates 7 and 8 (dotted line in FIG. 1). ). The engine 23 is arranged in a horizontal state extending in the left and right directions, and drives the hydraulic pump 24. The prime mover may be a hybrid type in which an electric motor is provided in the engine.

  Reference numeral 25 denotes a counterweight provided on the rear side of the turning frame 5 and positioned on the rear side of the engine 23. This counterweight 25 balances the weight with the working device 4 and is formed in an arc shape with the center in the left and right directions protruding backward.

  Next, the configuration of the floor member 26 that is a characteristic part of the first embodiment will be described in detail.

  Reference numeral 26 denotes a floor member provided on the revolving frame 5. As shown in FIGS. 2, 7 and the like, the floor member 26 has left and right front left plates 7 and 8 which are one of the left and right front vertical plates 7 and 8, that is, the outside in the left and right directions, Located on the left side and disposed on the front side of the engine 23. As shown in FIG. 8, the floor member 26 is formed as a substantially rectangular plate extending in the left and right directions. Specifically, the floor member 26 is provided in front of a driver seat 31 to be described later and a footrest portion 27 on which an operator puts his / her foot, and is provided in the vicinity of the left front vertical plate 7 continuously with the footrest portion 27. And a rising portion 28 formed. Here, the position near the left front vertical plate 7 is a position close to the left side surface of the left front vertical plate 7.

  The footrest portion 27 is formed as a flat plate-like body that extends across the partition vertical plate 10 and the floor support frame 19 of the revolving frame 5. On the left side of the footrest portion 27, the front corner portion is an arc-shaped chamfer 27A so as to correspond to the arc shape of the left side frame 17. On the other hand, the right end portion of the footrest portion 27 is a boundary position 29 extending in the front and rear directions, and the right side is a rising portion 28 from the boundary position 29.

  Further, on the front side of the footrest portion 27, openings 27B, 27C, and 27D for attaching a travel operation lever / pedal 33 and left and right operation pedals 34 and 35, which will be described later, are formed side by side in the left and right directions. Yes. The footrest portion 27 is bolted at the front portion onto the floor support frame 19 of the revolving frame 5 and is bolted at the rear portion onto the partition vertical plate 10.

  The rising portion 28 is located on the right side of the boundary position 29 and is formed to extend over the entire length in the front and rear directions along the left front vertical plate 7. When the rising portion 28 is mounted on the revolving frame 5, it rises from the boundary position 29 between the footrest portion 27 and the rising portion 28, and toward the upper position 7 B 1 of the hose insertion hole 7 B of the left front vertical plate 7. The structure extends to the vertical plate 7.

  Specifically, the rising portion 28 is a straight line that rises toward the left front vertical plate 7 by setting the right side position of the right operation pedal 35 as a boundary position 29 and bending the boundary position 29 upward as a folding line. It is formed as an inclined surface. In this case, the leading end 28A of the rising portion 28 is formed to extend to the left front vertical plate 7 at a position higher than the hose insertion hole 7B of the left front vertical plate 7, as shown in FIG. Further, chamfered portions 28B and 28C are formed at the corners in front and rear of the rising portion 28, respectively. Since the chamfered portions 28B and 28C are provided in an arrangement relationship with various members arranged around, the chamfered portions 28B and 28C may be omitted depending on the arrangement relationship.

  Here, the boundary position 29 between the footrest part 27 and the rising part 28 will be described. As shown in FIG. 6, the boundary position 29 is a position that allows the cylinder connecting pin 15 to move when the cylinder connecting pin 15 is inserted into and removed from the support bracket 14 of the revolving frame 5 toward the floor member 26. Is set. As a result, the rising portion 28 can avoid a plurality of hydraulic hoses 37 inserted through the hose insertion holes 7B of the left front vertical plate 7 as shown in FIG. It is possible to allow the cylinder connecting pin 15 to be inserted into and removed from the support bracket 14.

  As described above, the floor member 26 is configured so that the right side portion on the working device 4 side (the left front vertical plate 7 side) rises obliquely upward as the rising portion 28. Therefore, the floor member 26 can arrange the footrest portion 27 at a position lower than the upper portion of the hose insertion hole 7B of the left front vertical plate 7 while avoiding interference with each hydraulic hose 37 and the cylinder connecting pin 15. it can. Moreover, the floor member 26 can be easily formed by bending, for example, a single steel plate cut into a predetermined shape along the boundary position 29.

  Reference numeral 30 denotes a driver seat pedestal provided on the rear side of the floor member 26 (see FIGS. 2 and 7). The driver seat pedestal 30 is formed so as to rise from the rear side of the footrest part 27 and extend to the rear side so as to cover the engine 23. On the driver seat base 30, a driver seat 31 on which an operator is seated is provided.

  Work operation levers 32 for operating the work device 4 and the like are disposed on both the left and right sides of the driver seat 31. Further, a traveling operation lever / pedal 33 is provided in front of the driver's seat 31 so as to be positioned in the opening 27 </ b> B of the footrest portion 27 constituting the floor member 26. Furthermore, pedals 34 and 35 for performing an offset operation, an operation of equipment attached as an option, and the like are provided in the openings 27C and 27D of the footrest portion 27 sandwiching the traveling operation lever / pedal 33.

  A control valve device 36 is provided on the under cover 22 of the swivel frame 5 and is located below the floor member 26. The control valve device 36 controls hydraulic actuators such as the cylinders 4G to 4K of the work device 4 and a travel motor (not shown) of the lower traveling body 2. The control valve device 36 is connected to each work operation lever 32, the travel operation lever / pedal 33 and the like via a pilot hydraulic hose (not shown). Further, the control valve device 36 is connected to the cylinders 4G to 4K of the work device 4 via a plurality of hydraulic hoses 37 and the like.

  Here, among the hydraulic hoses 37, a plurality of, for example, six hydraulic hoses 37 connected to the cylinders 4H to 4K of the working device 4 extend to the right side from the control valve device 36 as shown in FIG. The upper left vertical plate 7 is connected to a hydraulic pipe (not shown) or the like provided in the work device 4 while passing through the hose insertion hole 7B of the left front vertical plate 7 while rising obliquely upward. For example, each hydraulic hose 37 is a thick hose having a large diameter dimension (inner diameter dimension of the flow path) in order to reduce pressure loss when circulating the pressure oil. The plurality of hydraulic hoses 37 having increased diameters may contact (interfer) with the floor member 26 at a position where they are inserted through the hose insertion holes 7B of the left front vertical plate 7. However, the rising portion 28 can prevent each hydraulic hose 37 from contacting the floor member 26.

  Reference numeral 38 denotes a canopy provided so as to cover the upper side and the right side of the driver's seat 31. The canopy 38 is configured as a three-post canopy by a right front column 38A, a left rear column 38B, a right rear column (not shown), a right side plate 38C, and a ceiling plate 38D. In the canopy 38, the right front column 38 </ b> A is attached to the front part of the footrest portion 27 of the floor member 26, and the left rear column 38 </ b> B and the right rear column are attached to the rear part of the driver seat base 30.

  The hydraulic excavator 1 according to the first embodiment has the above-described configuration, and the operation thereof will be described next.

  First, the operator gets on the floor member 26 and sits on the driver's seat 31. In this state, the operator can drive the lower traveling body 2 by operating the traveling operation lever / pedal 33. On the other hand, by operating the work operation lever 32, the work device 4 and the like can be operated to perform soil excavation work and the like.

  Thus, according to the first embodiment, a plurality of hydraulic hoses 37 extending from the control valve device 36 are connected to the hydraulic actuator of the work device 4 on the left front vertical plate 7 which is one vertical plate of the revolving frame 5. A hose insertion hole 7B is provided for insertion toward each of the cylinders 4H to 4K. In addition, the floor member 26 is positioned in front of the driver's seat 31 and a footrest portion 27 on which an operator puts his / her foot, and a standing portion provided in the vicinity of the left front vertical plate 7 continuously with the footrest portion 27. Part 28. The rising portion 28 rises from a boundary position 29 between the footrest portion 27 and the rising portion 28 and extends to the upper left vertical plate 7 toward the upper position 7B1 of the hose insertion hole 7B.

  Accordingly, each hydraulic hose 37 extending from the control valve device 36 on the turning frame 5 is connected to each cylinder 4H to 4K of the work device 4 by being inserted into the hose insertion hole 7B provided in the left front vertical plate 7. Can do. In this case, each hydraulic hose 37 extends obliquely upward from the control valve device 36 disposed below the floor member 26 toward the work device 4 at a position where the hydraulic hose 37 is inserted into the hose insertion hole 7B. Thus, when each hydraulic hose 37 is routed, each hydraulic hose 37 may interfere with the floor member 26 in the vicinity of the left front vertical plate 7.

  On the other hand, the floor member 26 is provided with a rising portion 28 in the vicinity of the left front vertical plate 7 continuous with the footrest portion 27, unlike the flat footrest portion 27 on which the operator puts his / her foot. On this, the rising part 28 rises from the boundary position 29 with the footrest part 27 and extends to the left front vertical plate 7 toward the upper position 7B1 of the hose insertion hole 7B. Therefore, even if each hydraulic hose 37 is enlarged in diameter, the rising portion 28 can avoid each hydraulic hose 37 by the rising structure, and the footrest portion 27 can be arranged at a low position.

  As a result, the driver seat pedestal 30 and the driver seat 31 can also be arranged at a low position in accordance with the footrest portion 27 of the low floor member 26. Thereby, since the eye point when the operator is seated on the driver's seat 31 can be lowered, the stability and operability at the time of working and traveling can be improved, and the height of the hydraulic excavator 1 can be suppressed. Can be miniaturized.

  On the other hand, the revolving frame 5 is provided with a support bracket 14 positioned in front of the work device mounting portions 7A and 8A of the left and right front vertical plates 7 and 8. The tube 4G1 of the boom cylinder 4G can be attached to the support bracket 14 by inserting the cylinder connecting pin 15 into the pin hole 14A. In this case, the rising position 28 of the floor member 26 has the boundary position 29 as a position where the cylinder connecting pin 15 is allowed to move even when the cylinder connecting pin 15 is inserted into and removed from the support bracket 14 toward the floor member 26 side. .

  Thereby, even when it is set as the structure which can perform the insertion / extraction operation | movement of the cylinder connection pin 15 with respect to the support bracket 14 easily, the footrest part 27 of the floor member 26 can be lowered | hung. Then, by lowering the footrest portion 27, the driver's seat 31 can be arranged at a low position as described above, and the eyepoint when seated on the driver's seat 31 can be lowered.

  Moreover, since the cylinder connecting pin 15 can be inserted into and removed from the floor member 26 side, members provided on the opposite side across the front vertical plates 7 and 8, such as a hydraulic oil tank, a fuel tank, a tool box, etc. Neither of them is shown), and it is not necessary to limit the shape and arrangement in order to secure a space for allowing the cylinder connecting pin 15 to move. Thereby, an oil storage tank, a tool box, etc. can enlarge the internal capacity | capacitance efficiently. As a result, the hydraulic oil tank, the fuel tank, the tool box, and the like are not restricted by their shapes and placement locations, so that the degree of design freedom can be increased and the hydraulic excavator 1 can be downsized.

  Further, the rising portion 28 of the floor member 26 is formed so as to extend forward and rearward along the left front vertical plate 7. Thereby, the rising part 28 can be arrange | positioned in the position which does not become obstructive when putting a foot | leg on the footrest part 27. FIG. In addition, the rising portion 28 can cover and hide each hydraulic hose 37 and the like disposed on the lower side of the floor member 26.

  Next, FIG. 9 and FIG. 10 show a second embodiment of the present invention. The feature of this embodiment is that the rising part of the floor member is formed to be curved in an arc shape. In the present embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.

  Reference numeral 41 denotes a floor member according to the second embodiment provided on the revolving frame 5. The floor member 41 has a footrest part 42, a rising part 43, and a boundary position 44, in substantially the same manner as the floor member 26 according to the first embodiment described above.

  42 is a front part of the driver's seat 31 where an operator can put his / her foot, and the foot part 42 is formed as a flat plate-like body, like the footrest part 27 according to the first embodiment. A chamfered portion 42A is formed on the left front side. Further, on the front side of the footrest part 42, openings 42B, 42C, and 42D for mounting the traveling operation lever / pedal 33 and the left and right operation pedals 34 and 35 are formed side by side in the left and right directions. Further, the right end portion of the footrest portion 42 is a boundary position 44.

  Reference numeral 43 denotes a rising portion provided on the right side of the boundary position 44 according to the second embodiment. The rising portion 43 extends over the entire length in the front and rear directions along the left front vertical plate 7 and is mounted on the revolving frame 5 in substantially the same manner as the rising portion 28 according to the first embodiment. In addition, it rises from the boundary position 44 between the footrest portion 42 and the rising portion 43 and extends to the left front vertical plate 7 toward the upper position 7B1 of the hose insertion hole 7B of the left front vertical plate 7.

  However, as shown in FIG. 10, the rising portion 43 according to the second embodiment is formed as a curved surface that rises upward from the boundary position 44 and is curved in a circular arc shape on the right side. This is different from the rising portion 28 according to the form. Furthermore, the rising portion 43 is different from the rising portion 28 according to the first embodiment in that chamfered portions are not formed at the front and rear corners.

  Thus, also in the second embodiment configured as described above, substantially the same operations and effects as those of the first embodiment described above can be obtained. In particular, in the second embodiment, the rising portion 43 is formed as a curved surface that rises upward from the boundary position 44 and is curved in an arc shape on the right side. As a result, the rising portion 43 can secure a larger space on the lower side by the amount formed in the arc shape compared to the case where the rising portion 28 is formed in a linear shape as in the first embodiment. As a result, the rising portion 43 can efficiently avoid the cylinder connecting pin 15 and each hydraulic hose 37 by the arc-shaped rising structure, and the footrest portion 42 can be arranged at a lower position.

  Next, FIG. 11 and FIG. 12 show a third embodiment of the present invention. The feature of this embodiment is that the rising part of the floor member is formed in a step shape. In the present embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.

  Reference numeral 51 denotes a floor member according to the third embodiment provided on the revolving frame 5. The floor member 51 has a footrest part 52, a rising part 53, and a boundary position 54, in substantially the same manner as the floor member 26 according to the first embodiment described above.

  52 is a front part of the driver's seat 31 where an operator can put his / her foot, and the foot part 52 is formed as a flat plate-like body, like the foot part 27 according to the first embodiment. A chamfered portion 52A is formed on the left front side. In addition, openings 52B, 52C, and 52D for attaching the travel operation lever / pedal 33 and the left and right operation pedals 34 and 35 are formed side by side in the left and right directions on the front side of the footrest portion 52. Further, the right end portion of the footrest portion 52 is a boundary position 54.

  Reference numeral 53 denotes a rising portion provided on the right side of the boundary position 54 according to the third embodiment. The rising portion 53 extends over the entire length in the front and rear directions along the left front vertical plate 7 and is mounted on the revolving frame 5 in substantially the same manner as the rising portion 28 according to the first embodiment. In addition, it is configured to rise from the boundary position 54 between the footrest portion 52 and the rising portion 53 and extend to the left front vertical plate 7 toward the upper position 7B1 of the hose insertion hole 7B of the left front vertical plate 7.

  However, as shown in FIG. 12, the rising portion 53 according to the third embodiment includes a vertical plate 53A that rises upward from the boundary position 54, and a horizontal plate that is bent from the top of the vertical plate 53A and extends to the right. It differs from the rising part 28 according to the first embodiment in that it is formed in a step shape by the face plate 53B. Further, the rising portion 53 is different from the rising portion 28 according to the first embodiment in that chamfered portions are not formed at the front and rear corners.

  Thus, also in the third embodiment configured as described above, substantially the same operations and effects as those of the first embodiment described above can be obtained. In particular, in the third embodiment, the rising portion 53 is formed in a step shape by the vertical plate 53A and the horizontal plate 53B. As a result, the rising portion 53 can secure a larger space on the lower side by the amount formed in the step shape as compared with the case where the rising portion 28 is formed in a straight line shape as in the first embodiment. As a result, the rising portion 53 can efficiently avoid the cylinder connecting pin 15 and each hydraulic hose 37 by the stepped rising structure, and the footrest portion 52 can be arranged at a lower position.

  In the first embodiment, the rising portion 28 that is provided continuously with the footrest portion 27 of the floor member 26 has a total length in the front and rear directions along the left front vertical plate 7 at the right side of the boundary position 29. The case where it was formed so as to extend over the range was described as an example. However, the present invention is not limited to this, and may be configured as a floor member 61 according to a modification shown in FIG.

  The floor member 61 according to this modification is provided with a rising portion 63 only at the front side portion where the cylinder connecting pin 15 and each hydraulic hose 37 are arranged on the right side of the footrest portion 62. Therefore, the boundary position 64 between the footrest part 62 and the rising part 63 is from the front and rear intermediate parts to the front end part. Thereby, the footrest part 62 can be formed widely. This configuration can be similarly applied to other embodiments.

  In the first embodiment, the floor member 26 has been described by taking as an example the case where the footrest part 62 and the rising part 63 are formed by bending a single steel plate along the boundary position 29. However, the present invention is not limited to this, and for example, the footrest portion and the rising portion are provided as separate members, and the footrest portion and the rising portion are integrally fixed using welding means, fastening means, and the like at the boundary position. It is good also as a structure which forms a floor member by this. This configuration can be similarly applied to other embodiments.

  In the first embodiment, the canopy-type hydraulic excavator 1 in which the canopy 38 that covers the upper side and the right side of the driver's seat 31 is provided on the upper side of the floor member 26 has been described as an example. However, the present invention is not limited to this. For example, the present invention may be applied to a cab-type hydraulic excavator in which a cab is provided on the upper side of the floor member so as to cover the upper side and the periphery of the driver's seat. This configuration can be similarly applied to other embodiments.

  Furthermore, in each embodiment, the small hydraulic excavator 1, what is called a mini excavator, 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 3 Upper revolving body 4 Working device 4G to 4K Cylinder (hydraulic actuator)
DESCRIPTION OF SYMBOLS 5 Rotating frame 6 Bottom plate 7 Left front vertical plate 7A, 8A Working device attachment site 7B Hose insertion hole 7B1 Upper position 8 Right front vertical plate 13 Horizontal plate 14 Support bracket 15 Cylinder connection pin (connection pin)
23 Engine (Motor)
26, 41, 51, 61 Floor member 27, 42, 52, 62 Footing part 28, 43, 53, 63 Rising part 29, 44, 54, 64 Boundary position 30 Driver's seat base 31 Driver's seat 36 Control valve device 37 Hydraulic pressure hose

Claims (3)

A self-propelled lower traveling body, an upper revolving body that is turnably mounted on the lower traveling body, and a working device provided on the front side of the upper revolving body so as to be able to be lifted and lowered using a hydraulic actuator as a power source Become
The upper swing body is
A bottom plate attached to the lower traveling body, and a work device attachment portion for attaching the work device to a front position in the front and rear direction, which is erected and extended in the front and rear directions with a space in the left and right directions on the bottom plate. A swivel frame comprising left and right vertical plates,
A prime mover disposed in a horizontally placed state extending rearward and leftward on the revolving frame located behind the work device mounting portion;
Of the left and right vertical plates constituting the revolving frame, a floor member provided on the front side of the prime mover and positioned on the left and right sides of one vertical plate,
A driver seat pedestal provided with a driver seat that rises from the rear side of the floor member and extends to the rear side so as to cover the prime mover and on which an operator is seated;
In a construction machine that includes a control valve device that is provided on the swivel frame and is connected to a hydraulic actuator of the working device and a plurality of hydraulic hoses that are positioned below the floor member,
Of the left and right vertical plates of the swivel frame, the one vertical plate has a hose insertion hole through which each hydraulic hose extending from the control valve device is inserted toward the hydraulic actuator of the working device. Provided,
The floor member is formed by a footrest portion where an operator puts his / her foot on the front side of the driver's seat, and a rising portion provided in the vicinity of the one vertical plate continuously with the footrest portion. ,
The construction machine is characterized in that the rising part rises from a boundary position between the footrest part and the rising part and extends to the one vertical plate toward an upper position of the hose insertion hole. Between the left and right vertical plates of the swivel frame, a horizontal plate extending in the left and right directions and connecting the vertical plates is provided,
The horizontal plate is provided with a support bracket that is positioned on the front side of the work device mounting portion and supports the hydraulic actuator using a connection pin,
2. The rising portion of the floor member is configured such that the boundary position is a position where the connecting pin is allowed to move when the connecting pin is inserted into and removed from the support bracket toward the floor member. The construction machine described.   The construction machine according to claim 1, wherein the rising portion of the floor member is formed so as to extend forward and rearward along the one vertical plate.

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