JP2005307522A - Swivel type construction machinery - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide swivel type construction machinery capable of raising built-up workability and maintenance property or the like by providing additional hydraulic piping with a simple work. <P>SOLUTION: In the case additional hydraulic piping 30 is provided to a front device 4 side, fixed piping 31 of the additional hydraulic piping 30 is mounted to the front device 4 side to connect to a breaker 36, and flexible piping 32 is connected to a piping connection port 28A of reserve hydraulic piping 28 provided to the front side of an upper turning body 3 through a right side of a right side plate 6B forming a swing post 6. Accordingly, the additional hydraulic piping 30 can be simply added to mount without passing through an inside of the like of the swing post 6 like the conventional technique. Since the flexible piping 32 avoids hydraulic piping 24 for the front on the left side of the swing post 6 and is placed to the right side of the right side disc 6B of the swing post 6, it can be prevented to interfere with the hydraulic piping 24 for the front even if the swing post 6 is oscillated. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a swivel construction machine such as a hydraulic excavator in which a front device is provided so as to be swingable leftward and rightward.

  Generally, as a swing type construction machine, for example, a hydraulic excavator or the like is known, and this hydraulic excavator includes a self-propelled lower traveling body, an upper revolving body that is rotatably mounted on the lower traveling body, The front apparatus is generally constituted by a front device provided on the front side of the upper swing body so as to be able to move up and down. The front device includes a boom, an arm, a bucket, and a boom cylinder, an arm cylinder, a bucket cylinder, and the like that drive these. Also. The bucket can be replaced with a front attachment such as a breaker or grapple according to the work content.

  Here, as the hydraulic excavator, for example, there is a swing type hydraulic excavator in which the front device can swing leftward and rightward so that excavation work of a side groove can be performed. The upper swing body of the swing type hydraulic excavator includes a swing frame provided with a swing post that supports the front device so as to be swingable leftward and rightward, and a control valve mounted on the swing frame. The valve and each cylinder provided in the front device are connected by a plurality of hydraulic pipes. In addition, each hydraulic pipe is a flexible pipe between the upper swing body and the front device, and a movable part of the front device is flexible.

  The flexible piping between the upper swing body and the front device passes through the inside of the swing post so as not to get in the way during work. Further, the flexible pipe is bent in a substantially S-shape in the space in the swing post in order to allow the swinging movement of the swing post and the lifting / lowering movement of the boom of the front device (see, for example, Patent Document 1). ).

  On the other hand, when excavating, for example, a hydraulic excavator, a breaker, a grapple or the like may be attached to the tip of an arm instead of a bucket. Since this breaker or the like has a crushing cylinder that vibrates the chisel, it is necessary to add a breaker hydraulic pipe separately from the hydraulic pipe that supplies and discharges the pressure oil to and from each cylinder of the front device.

  As described above, the additional hydraulic piping to be attached when the breaker or the like is attached to the front device is generally configured to be connected to the breaker crushing cylinder through the inside of the swing post so as to be along the front hydraulic piping. .

JP 2001-214467 A

  By the way, in the hydraulic excavator according to the related art described above, the additional hydraulic piping for supplying and discharging the pressure oil to the breaker crushing cylinder attached to the front device passes through the inside of the swing post along the front hydraulic piping. For this reason, since the additional hydraulic piping for the breaker passes through the narrow swing post in addition to the hydraulic piping for the front device, the assembling workability and the maintenance workability are deteriorated.

  Moreover, when installing additional hydraulic piping to the assembled hydraulic excavator later, it is necessary to bend the pressure-resistant hydraulic piping and pass it through a slight gap, which requires a lot of labor and time. is there.

  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 provide an additional hydraulic piping by a simple operation, and to make it possible to improve assembly workability, maintainability, and the like. To provide construction machinery.

  A construction machine according to the invention of claim 1 is a self-propelled lower traveling body, an upper revolving body that is turnably mounted on the lower traveling body, and a swing post on the front side of the upper revolving body. A front device supported to swing rightward and a front attachment selectively attached to the front device.

  In order to solve the above-mentioned problem, the feature of the configuration adopted by the invention of claim 1 is that the front swiveling body is positioned in the vicinity of the swing post, and pressure oil is supplied to and discharged from the front attachment. A pipe connection port is provided, and an additional hydraulic pipe connected to the front attachment is provided at a front end side extending along the front apparatus on the front device side, and a base end side of the additional hydraulic pipe is the swing post. It is that it was set as the structure connected with the said piping connection port via the side of this.

  According to the invention of claim 2, the additional hydraulic pipe is constituted by a fixed pipe disposed along the front device and a flexible pipe provided between the fixed pipe and the pipe connection port. is there.

  According to a third aspect of the present invention, the pipe connection port is provided to rise upward at a position exposed on the front side of the upper swing body, and the base end side of the additional hydraulic pipe is connected to the pipe connection port from above. It is to have done.

  According to the invention of claim 4, the swing post is provided with a guide member for guiding the additional hydraulic pipe.

  According to the first aspect of the present invention, when the additional hydraulic piping connected to the front attachment is provided, the additional hydraulic piping is provided along the front device, and the tip side thereof is connected to the front attachment. Further, the proximal end side of the additional hydraulic piping is connected to a piping connection port provided on the front side of the upper swing body via the side of the swing post. Thereby, the additional hydraulic piping can be easily arranged on the side of the swing post without passing through the inside of the narrow swing post, for example.

  As a result, additional hydraulic piping can be installed in a simple operation according to the selected front attachment when assembling or after assembling the swivel construction machine, improving assembly workability and maintenance workability. Can do.

  According to the invention of claim 2, the additional hydraulic pipe can be easily provided by arranging the fixed pipe along the front device and connecting the flexible pipe to the fixed pipe and the pipe connection port on the upper swing body. it can. Further, the flexible pipe can be allowed to swing by the swing post and to raise and lower the front device by bending.

  According to the invention of claim 3, since the proximal end side of the additional hydraulic piping is only connected from above to the piping connection port that rises at the position exposed to the front side of the upper swing body, it can be easily connected to the piping connection port. They can be connected, and assembly work and maintenance work can be easily performed.

  According to the invention of claim 4, even when the swing post is swung, the additional hydraulic pipe passing through the side of the swing post is greatly swung when the swing post is swung. Or can be prevented from interfering with surrounding members due to falling, and durability and reliability can be improved.

  Hereinafter, a small hydraulic excavator will be described as an example of a swivel construction machine according to an embodiment of the present invention, and will be described in detail with reference to FIGS.

  In FIG. 1, reference numeral 1 denotes a canopy-type hydraulic excavator as a swing construction machine. The hydraulic excavator 1 is mounted on a self-propelled crawler type lower traveling body 2 and on the lower traveling body 2 so as to be able to swivel. The upper revolving body 3 and a front device 4 provided on the front side of the upper revolving body 3 so as to be swingable and foldable are generally constituted.

  Here, the front device 4 includes a boom 4A attached to a swing post 6 described later so as to be able to move up and down, an arm 4B attached to the tip of the boom 4A so as to be able to move up and down, and a tip of the arm 4B. A bucket 4C rotatably attached, a boom cylinder 4D provided between the swing post 6 and the boom 4A, an arm cylinder 4E provided between the boom 4A and the arm 4B, an arm 4B and the bucket It is roughly constituted by a bucket cylinder 4F provided between 4C. For example, when performing a dismantling operation or the like, a breaker 36 described later can be attached to the front device 4 instead of the bucket 4C.

  On the other hand, a front hydraulic pipe 24 to be described later for supplying pressure oil to the boom cylinder 4D, the arm cylinder 4E, and the bucket cylinder 4F is attached to the front device 4 along the boom 4A and the arm 4B. When the breaker 36 is attached to the tip of the arm 4B of the front device 4 instead of the bucket 4C, an additional hydraulic pipe 30 for driving the crushing cylinder 36B provided in the breaker 36 is attached.

  Further, the upper turning body 3 is formed in a substantially circular shape when viewed from above so that it can turn substantially within the vehicle width of the lower traveling body 2 (see FIG. 3). The upper swing body 3 includes a swing frame 5, a swing post 6, an engine 7, a driver's seat 17, a floor plate 19 and the like which will be described later.

  Reference numeral 5 denotes a revolving frame that constitutes a support structure for the upper revolving structure 3. The revolving frame 5 includes a flat bottom plate 5A that extends in the front and rear directions in the middle in the left and right directions, as shown in FIG. A pair of vertical plates 5B and 5B provided on the upper surface side of the bottom plate 5A so as to be separated from each other on the left and right sides, a cylindrical support bracket 5C provided at the tip of each vertical plate 5B, and the support A front beam 5D provided on the rear side of the bracket 5C and extending in the left and right directions so as to be substantially orthogonal to the respective vertical plates 5B, and a center extending in the left and right directions at the rear portion of each vertical plate 5B. A beam 5E and an under cover 5F laid on the left side of the bottom plate 5A so as to cover the space between the front beam 5D and the middle beam 5E are roughly configured. Here, the revolving frame 5 is provided with, for example, a through-hole (not shown) in the front beam 5D and the like, and a later-described front hydraulic pipe 24 is inserted into the through-hole.

  6 is a swing post attached to the support bracket 5C of the revolving frame 5. The swing post 6 is connected to the support bracket 5C via a connecting pin (not shown). It can swing rightward. The swing post 6 supports the boom 4A of the front device 4 so as to be able to move up and down.

  Here, as shown in FIGS. 4 and 5, the swing post 6 is formed in a U-shape that is located between the left side plate 6A, the right side plate 6B, and the side plates 6A and 6B and opens rearward. The rear plate 6C is attached so that the support bracket 5C of the revolving frame 5 is sandwiched from above and below by the rear plate 6C. Further, the left side plate 6A is provided with a pipe insertion hole (not shown) for inserting a later-described front hydraulic pipe 24. On the other hand, a cylinder bracket 6D is provided on the right side plate 6B, and a swing cylinder 16 (described later) that swings (swings) the swing post 6 in the left and right directions is attached to the cylinder bracket 6D. Further, a boom 4A of the front device 4 is attached to the upper portions of the left side plate 6A and the right side plate 6B so as to be able to move up and down, and a boom cylinder 4D is attached to the front portion.

  Reference numeral 7 denotes an engine mounted on the rear side of the revolving frame 5, and the engine 7 is arranged in a horizontally placed state extending in the left and right directions. A hydraulic pump 8 driven by the engine 7 is provided on the left side of the engine 7, and a radiator 9 and an oil cooler 10 are disposed on the right side of the engine 7.

  Further, 11 is a hydraulic oil tank located on the front side of the radiator 9 and provided on the right side of the revolving frame 5, and 12 is a fuel tank provided on the front side of the hydraulic oil tank 11. Reference numeral 13 denotes a support member provided on the rear side of the revolving frame 5, and the support member 13 supports a rear side portion such as a canopy 34 described later.

  Reference numeral 14 denotes a center joint provided on the bottom plate 5A of the swing frame 5 and positioned at the center of rotation of the upper swing body 3. The center joint 14 moves toward the lower traveling body 2 while allowing the upper swing body 3 to rotate. Pressure oil is supplied. A swing motor 15 is provided around the center joint 14 and provided on the bottom plate 5A of the swing frame 5. The swing motor 15 is a drive for swinging the upper swing body 3 on the lower traveling body 2. Constitutes the source.

  Reference numeral 16 denotes a swing cylinder (shown in FIGS. 1 and 4) provided between the swing frame 5 and the swing post 6, and the swing cylinder 16 swings the swing post 6 leftward and rightward. is there.

  Reference numeral 17 denotes a driver's seat (shown in FIGS. 1 and 2) provided on the upper side of the turning frame 5. The driver's seat 17 is seated by an operator who operates the excavator 1. Further, work levers 18 and 18 for operating the front device 4 and the like are disposed on both the left and right sides of the driver's seat 17.

  Reference numeral 19 denotes a floor board provided in the front portion of the driver's seat 17, and the floor board 19 is provided so as to cover the upper side of the revolving frame 5. Further, a traveling lever / pedal 20 or the like for traveling the lower traveling body 2 is disposed at the front side position of the floor plate 19.

  Here, the floor plate 19 is disposed on the upper side of the swivel frame 5 with a space therebetween, so that a center joint 14, a swivel motor 15, a control valve 23 to be described later, and the like are accommodated between the swivel frame 5 and the floor plate 19. A space is formed. The space between the revolving frame 5 and the floor board 19 is covered with a skirt cover 21 described later.

  Reference numeral 21 denotes a skirt cover provided on the outer peripheral side of the swivel frame 5. The skirt cover 21 covers the swivel frame 5, the control valve 23, and hydraulic pipes 24, 25, 26, 27 described later. 2 and 3, the skirt cover 21 includes, for example, an arcuate left cover 21A covering the left side of the revolving frame 5, an arcuate right cover 21B covering the right side, and a left front cover covering the left front side. 21C and a right front cover 21D that covers the right front side are roughly configured. Further, in the skirt cover 21, the front side portions of the left cover 21A and the right cover 21B, the left front cover 21C, and the right front cover 21D are formed with substantially the same height as the vertical plate 5B, the front beam 5D, and the like of the revolving frame 5. ing.

  An exterior cover 22 is provided on the upper side of the skirt cover 21, and the exterior cover 22 is located on the rear side of the driver seat 17 and covers the engine 7, and is located on the right side of the driver seat 17. A tank cover 22B that covers the oil tank 11, the fuel tank 12, and the like is roughly configured.

  Reference numeral 23 denotes a control valve (see FIG. 3) located on the left front side of the revolving frame 5 and disposed on the under cover 5F. The control valve 23 is formed by connecting a plurality of hydraulic pilot type spool valves. Has been. That is, the control valve 23 controls the boom control valve that controls the boom cylinder 4D of the front device 4, the arm control valve that controls the arm cylinder 4E, the bucket control valve that controls the bucket cylinder 4F, and the swing cylinder 16. A swing control valve, a swing control valve that controls the swing motor 15, a left travel control valve that controls the travel of the lower traveling body 2, a right travel control valve, and a discharge plate that controls a cylinder of a discharge plate 35 to be described later The control valve and the preliminary control valve are generally configured.

  The preliminary control valve constituting the control valve 23 controls the crushing cylinder 36 </ b> B built in the breaker 36 when the breaker 36 is attached to the front device 4. And the hydraulic pilot part of each control valve 23 is connected to the working lever 18, the traveling lever / pedal 20, the spare pedal, the switch, etc. (all not shown).

  Reference numeral 24 denotes a plurality of front hydraulic pipes provided between the control valve 23 and the front device 4. As shown in FIGS. 1 and 3, these hydraulic pipes 24 include a boom control valve, an arm control valve, and a bucket control valve of the control valve 23, and a boom cylinder 4 </ b> D, an arm cylinder 4 </ b> E, and a bucket cylinder 4 </ b> F of the front device 4. Connected. Each front hydraulic pipe 24 extends from the control valve 23 to the front side along the left vertical plate 5B of the swing frame 5, and is formed on the left side plate 6A that forms the swing post 6 from a pipe through hole provided in the front beam 5D. It protrudes to the left. Further, each hydraulic pipe 24 protruding from the upper swing body 2 enters the swing post 6 from a pipe insertion hole provided in the left side plate 6A of the swing post 6, and as shown in FIGS. Between the face plate 6A and the right side plate 6B, it is bent in an approximately S shape and extends to the upper surface side of the boom 4A of the front device 4, and is connected to the boom cylinder 4D, the arm cylinder 4E, and the bucket cylinder 4F.

  Reference numeral 25 denotes a plurality of hydraulic pipes for the traveling and earthing plates 35 provided by connecting the left traveling control valve, the right traveling control valve, the earthing plate control valve and the center joint 14 of the control valve 23. Yes. Reference numeral 26 denotes a plurality of hydraulic pipes for turning provided by connecting the turning control valve of the control valve 23 and the turning motor 15. Further, reference numeral 27 denotes a plurality of swing hydraulic pipes provided by connecting the swing control valve of the control valve 23 and the swing cylinder 16.

  Reference numeral 28 denotes two auxiliary hydraulic pipes provided on the upper swing body 3, and one of the auxiliary hydraulic pipes 28 is connected to the front control valve of the control valve 23 as shown in FIG. The hydraulic pipe 24 extends to the right side beyond the left vertical plate 5B of the swivel frame 5, and bends and extends to the front side in the vicinity of the right vertical plate 5B. The other pipe 28 extends rearward from the preliminary control valve of the control valve 23, then extends to the right side beyond the left vertical plate 5B and the turning motor 15, and is connected to one pipe 28 in the vicinity of the right vertical plate 5B. Along the front. The front portions of the two auxiliary hydraulic pipes 28 are respectively pipe connection ports 28 </ b> A and are fixed on the front beam 5 </ b> D of the revolving frame 5 by a fixing member 29.

  Here, as shown in FIG. 4, the pipe connection port 28 </ b> A of each auxiliary hydraulic pipe 28 is provided near the rear side of the swing post 6, with the tip portion raised upward. The pipe connection port 28 </ b> A is located between the floor plate 19 and the tank cover 22 </ b> B of the exterior cover 22 and is provided in a state exposed to the outside of the upper swing body 3. Thereby, it is possible to easily connect to the pipe connection port 28 </ b> A simply by screwing a flexible pipe 32 described later from above. The spare hydraulic pipe 28 may be attached together with the additional hydraulic pipe 30 when the breaker 36 is attached to the front device 4 or may be attached in advance when the hydraulic excavator 1 is assembled. Can be freely selected according to the situation.

  Next, reference numeral 30 denotes two additional hydraulic pipes provided on the front device 4 side. Each of the additional hydraulic pipes 30 is used when a breaker 36 described later is attached to the front end of the arm 4B of the front device 4 instead of the bucket 4C. It is provided. The additional hydraulic pipe 30 is generally constituted by a fixed pipe 31 and a flexible pipe 32 (described later) that connect the pipe connection port 28A of the auxiliary hydraulic pipe 28 and the crushing cylinder 36B of the breaker 36.

  Reference numeral 31 denotes two fixed pipes (see FIGS. 1 and 4) made of a pipe material fixed to the front device 4, and each fixed pipe 31 extends along the boom 4A and the arm 4B. . Each fixed pipe 31 has a connection end portion 31A for connecting a flexible pipe 32 (described later) on the right side surface of which one end is positioned on the base end side of the boom 4A, and the other end is positioned on the front end side of the arm 4B. The left and right side surfaces are connection end portions 31B (only the right side is shown) connected to the hydraulic piping 36C of the breaker 36. The fixed pipe 31 is a flexible pipe 31C from the tip end of the boom 4A corresponding to the movable part between the boom 4A and the arm 4B to the connection end 31B.

  Reference numeral 32 denotes two flexible pipes composed of hoses or the like constituting the additional hydraulic pipe 30 together with the fixed pipe 31. The flexible pipe 32 connects the fixed pipe 31 to the auxiliary hydraulic pipe 28. It has flexibility so as to allow the heel up and down and the swing of the swing post 6. The flexible pipe 32 has one connection end 32A connected to the pipe connection port 28A of the auxiliary hydraulic pipe 28 from the upper side, and the other connection end 32B connected to the connection end 31A of the fixed pipe 31. .

  Each flexible pipe 32 is different from the front hydraulic pipe 24 passing through the swing post 6 described above, and passes through (passes through) the outer side position of the right side plate 6B of the swing post 6 while being exposed to the outside. Has been placed. Specifically, each flexible pipe 32 extends rearward from the connection end 31 </ b> A of each fixed pipe 31, curves upward at a position near the right side plate 6 </ b> B of the swing post 6, and is connected to a pipe connection port 28 </ b> A of the auxiliary hydraulic pipe 28. Connected from above. Here, the flexible pipe 32 is curved to the upper side of the floor plate 19, thereby allowing play and allowing the front device 4 to move up and down and the swing post 6 to swing. It is possible to easily perform maintenance work such as connection work and replacement, visual confirmation work, and the like.

  In addition, each flexible pipe 32 has a different path from the front hydraulic pipe 24 passing through the inside of the swing post 6, that is, the side of the swing post 6 without being forcedly inserted into a narrow place, bent, or the like. It can be provided in an unreasonable state. Further, each flexible pipe 32 exposed to the outside is easy to reach at the time of work, and the connection place is easy to visually check. Therefore, when the hydraulic excavator 1 is assembled or after it is assembled, the connection work can be easily performed. Can do.

  Reference numeral 33 denotes a guide member attached to the right side plate 6B of the swing post 6, and the guide member 33 holds (guides) each flexible pipe 32 of the additional hydraulic pipe 30 so as not to fall down. Further, as shown in FIG. 5, the guide member 33 is a vertically long annular guide ring 33A, 33A in which one of the long side portions is fixed to each other, and an attachment fixed to the other long side portion of each guide ring 33A. This is roughly constituted by the member 33B.

  The guide member 33 is screwed to the right side plate 6B of the swing post 6 with the mounting member 33B. Thereby, the guide member 33 allows the flexible pipe 32 to be inserted into each guide ring 33 </ b> A, thereby allowing the flexible pipe 32 to change in the upward and downward directions while allowing the flexible pipe 32 to swing. In addition, it is possible to suppress collapse and prevent interference with surrounding members.

  Reference numeral 34 denotes a canopy provided so as to cover the upper side of the driver's seat 17, and 35 denotes a discharge plate provided on the front side of the lower traveling body 2, and the discharge plate 35 is raised by a cylinder (not shown). The height position can be displaced downward.

  On the other hand, 36 is a breaker (illustrated in FIG. 1) as a front attachment that is selectively attached to the front device 4, and the breaker 36 crushes concrete or the like during dismantling work. The breaker 36 has a built-in cylinder 36B that vibrates the chisel 36A. And when using the breaker 36, it attaches to the front-end | tip of the arm 4B instead of the bucket 4C, and connects the hydraulic piping 36C connected to the cylinder 36B to the front-end | tip of the fixed piping 31 of the additional hydraulic piping 30.

  The hydraulic excavator 1 according to the present embodiment has the above-described configuration. Next, an operation when the front apparatus 4 is used for work will be described.

  First, the operator can drive the lower traveling body 2 by sitting on the driver's seat 17 and operating the traveling lever / pedal 20. Further, when the front device 4 is moved to, for example, the left side of the lower traveling body 2 to perform the side groove digging operation, the swing post 6 is swung to the right by the swing cylinder 16 and the upper revolving body 3 is swung by the front device 4. By turning to the left side opposite to the direction, the front device 4 is translated to the left side, and the left side gutter work is performed using the front device 4. Further, the right side ditching operation can be performed by performing the operation in the reverse direction.

  Next, a case where a dismantling operation or the like is performed using the hydraulic excavator 1 will be described. In this dismantling work, for example, the breaker 36 is attached to the tip of the arm 4B instead of the bucket 4C. Further, when the breaker 36 is attached, it is necessary to supply pressure oil to the crushing cylinder 36 </ b> B provided in the breaker 36. Therefore, an additional hydraulic pipe 30 for connecting the auxiliary hydraulic pipe 28 on the upper swing body 3 side and the hydraulic pipe 36C of the breaker 36 is attached.

  In this case, the additional hydraulic piping 30 can easily attach the fixed piping 31 along the boom 4A and the arm 4B. Moreover, the flexible pipe 32 can be connected to the pipe connection port 28 </ b> A of the auxiliary hydraulic pipe 28 exposed to the front side of the upper swing body 3 through the side of the swing post 6 from above by a simple operation.

  Then, when the preliminary control valve of the control valve 23 and the crushing cylinder 36B of the breaker 36 are connected by the additional hydraulic pipe 30 or the like, for example, a crushing cylinder 36B of the breaker 36 is operated by stepping on a spare pedal (not shown). Can be dismantled by the chisel 36A.

  Thus, according to the present embodiment, when the additional hydraulic piping 30 is provided on the front device 4 side, the fixed piping 31 of the additional hydraulic piping 30 is attached to the front device 4 side and connected to the breaker 36, and the flexible piping is provided. What is necessary is just to connect 32 to the piping connection port 28A of the auxiliary | assistant hydraulic piping 28 provided in the front side of the upper turning body 3 via the right side of the right side surface board 6B which forms the swing post 6. FIG.

  For this reason, in this embodiment, the additional hydraulic piping 30 can be easily added and attached without passing through the inside of the swing post 6 or the like as in the prior art. As a result, when the hydraulic excavator 1 is assembled, and even after the hydraulic excavator 1 is assembled, the additional hydraulic piping 30 can be provided by a simple operation, and the assembly workability and maintenance workability can be improved.

  In addition, the flexible piping 32 of the additional hydraulic piping 30 is provided via the right side of the right side plate 6B of the swing post 6 while avoiding the front hydraulic piping 24 located on the left side of the swing post 6. Even when the post 6 is swung or the front device 4 is moved up and down, the flexible pipe 32 can be prevented from interfering with the front hydraulic pipe 24, and damage to the pipes 24, 32, etc. can be prevented. . Moreover, the flexible piping 32 can be removed from the operator's front view, and workability can be improved.

  Further, since the flexible piping 32 is curved and provided so as to rise above the floor plate 19, the flexible piping 32 is also connected to the front hydraulic piping 24, the swing post 6, the swing cylinder 16, and the like. Interference can be prevented. In addition, since the flexible pipe 32 can be easily visually confirmed at the time of work, interference with surrounding obstacles can be prevented in advance, and safety and reliability can be improved. Further, since the flexible pipe 32 can be easily inspected from the outside, oil leakage, damage, etc. can be found and repaired at an early stage.

  Further, since the additional hydraulic pipe 30 is constituted by a fixed pipe 31 attached to the front device 4 and a flexible pipe 32 connecting the fixed pipe 31 and the auxiliary hydraulic pipe 28, the swing post 6 is formed by the flexible pipe 32. Can be allowed to swing and to move the front device 4 up and down.

  On the other hand, the auxiliary hydraulic pipe 28 provided on the upper swing body 3 side is provided with its pipe connection port 28A raised upward at a position exposed to the outside in the vicinity of the rear side of the swing post 6. Can be easily connected to the pipe connection port 28A simply by screwing from above.

  Further, the swing post 6 is provided with a guide member 33 that holds the flexible pipe 32 in an arcuate state on the right side of the swing post 6 so that the swing post 6 is swung. Further, it is possible to prevent the flexible pipe 32 from shaking greatly or falling down and interfering with surrounding members, and durability and reliability can be improved.

  In the embodiment, the case where the breaker 36 is attached to the tip of the arm 4B of the front device 4 instead of the bucket 4C has been described as an example. However, the present invention is not limited to this, and another front attachment such as a grapple may be attached to the tip of the arm 4B.

  Further, in the embodiment, the description has been given by taking the canopy-spec hydraulic excavator 1 including the canopy 34 that covers the upper side of the driver's seat 17 as an example. However, the present invention is not limited to this, and may be applied to, for example, a cab specification hydraulic excavator provided with a cab that covers the periphery and upper side of the driver's seat.

  Furthermore, in the embodiment, the crawler hydraulic excavator 1 is exemplified as the swing construction machine. However, the present invention is not limited to this, and may be applied to, for example, a wheeled hydraulic excavator.

It is a front view which shows the hydraulic excavator applied to embodiment of this invention. It is a right view which expands and shows a hydraulic excavator from the right side in the state which abbreviate | omitted the front apparatus and the swing post. It is a top view which shows the upper turning body in the state where a driver's seat, a floor board, an exterior cover, etc. were omitted. It is a perspective view of the principal part expansion which shows the attachment state of flexible piping etc. of additional hydraulic piping. It is an expansion perspective view which expands and shows a swing post and a guide member.

Explanation of symbols

1 Hydraulic excavator (swivel construction machine)
2 Lower traveling body 3 Upper revolving body 4 Front device 4A Boom 4B Arm 4C Bucket 5 Swing frame 6 Swing post 23 Control valve 24 Front hydraulic piping 28 Preliminary hydraulic piping 28A Piping connection port 30 Additional hydraulic piping 31 Fixed piping 32 Flexible piping 33 Guide member 36 Breaker (front attachment)

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 swing post supported on the front side of the upper revolving body so as to be swingable left and right. In a swivel construction machine comprising a front device and a front attachment selectively attached to the front device,
Provided on the front side of the upper swing body is a pipe connection port for supplying and discharging pressure oil to and from the front attachment in the vicinity of the swing post,
The front device side is provided with an additional hydraulic pipe connected to the front attachment at the tip side extending along the front device,
A swivel construction machine characterized in that a base end side of the additional hydraulic pipe is connected to the pipe connection port via a side of the swing post.   The swivel type according to claim 1, wherein the additional hydraulic pipe is constituted by a fixed pipe disposed along the front device and a flexible pipe provided between the fixed pipe and the pipe connection port. Construction machinery.   3. The pipe connection port is configured to rise upward at a position exposed to the front side of the upper swing body, and the base end side of the additional hydraulic pipe is connected to the pipe connection port from above. Swivel construction machine.   The swing construction machine according to claim 1, 2 or 3, wherein the swing post is provided with a guide member for guiding the additional hydraulic pipe.

Images