JP4188779B2 - Swivel construction machine - Google Patents

Description

  The present invention relates to a swivel construction machine that is suitably used for, for example, a hydraulic excavator.

  In general, excavation work machines such as hydraulic excavators are known as swing-type construction machines. For example, a hydraulic excavator includes a lower traveling body capable of self-propelling and an upper swing mounted on the lower traveling body in a rotatable manner. The main body and a work device provided on the front side of the upper revolving body so as to be able to move up and down are generally constituted.

  Further, as the hydraulic excavator, there is a swing type hydraulic excavator in which the working device can swing leftward and rightward so that excavation work of a side groove can be performed, for example. An upper swing body of the swing type excavator includes a swing frame that forms a support structure having a bracket attached to the front end side, and a swing post that is swingably attached to the bracket of the swing frame via a connecting pin. And a hydraulic hose provided to connect between the upper swing body and the actuator of the working device.

  The working device is attached to the swing post so as to be able to move up and down, and the swing post swings left and right by a swing actuator provided between the swing post and the swing frame. For this reason, the hydraulic hose that connects the control valve device of the upper swing body and the actuator of the working device bends in a complicated manner according to the operation of the working device and the swing post.

  Therefore, a swing-type hydraulic excavator is provided with a support member that is positioned on the side surface of the swing post and supports the hydraulic hose toward the outside, and a roller that smoothly guides the hydraulic hose is attached to the support member. . Thereby, the movement of the hydraulic hose is made smooth by passing the hydraulic hose extending from the side of the swing post to the side of the working device through the support member (see, for example, Patent Document 1).

Japanese Patent Laid-Open No. 11-200409

  Some swing-type hydraulic excavators have a configuration in which the hydraulic hose passes through the swing post in order to prevent the hydraulic hose from being hooked during work and to improve the appearance. Specifically, the swing post is provided with a hose insertion port so as to communicate with a hose accommodation space formed inside the swing post, and the hydraulic hose has a part in the middle thereof entering the hose accommodation space through the hose insertion port. The hydraulic hose that has entered the hose housing space rises in the hose housing space and extends toward the work device (see, for example, Patent Document 2).

JP 2001-214467 A

  By the way, in the hydraulic excavator of Patent Document 1 described above, since the support member that supports the hydraulic hose is provided outward, the support member protrudes from the swing post. For this reason, there is a problem in that the appearance of the appearance is deteriorated and there is a possibility of being caught during the work, so that work efficiency, operability and the like are lowered.

  On the other hand, the hydraulic excavator of Patent Document 2 improves the appearance by passing the hydraulic hose from the hose insertion opening into the swing post, and prevents a situation in which the hydraulic hose is hooked.

  However, in the configuration in which the hydraulic hose is passed through the hose insertion port as in the hydraulic excavator of Patent Document 2, when the hydraulic hose is assembled, the hydraulic hose is brought into frictional contact with the hose insertion port, which takes time for assembly work. . In addition, if the hydraulic hose is pulled or loosened due to swinging of the swing post and comes into frictional contact with the hose insertion port, damage such as partial wear on the hydraulic hose or peeling off of the paint on the hose insertion port may occur. There is a problem that it occurs.

  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 facilitate assembly work by smoothly guiding the hydraulic hose passing through the hose insertion port, and to wear and damage each member. It is an object of the present invention to provide a swivel construction machine that can prevent such a situation.

  According to a first aspect of the present invention, there is provided a swivel-type construction machine connected to a lower traveling body, an upper revolving body having a swivel frame that is pivotably mounted on the lower traveling body and has a front end as a bracket, and a bracket of the swivel frame. A swing post coupled to be swingable left and right via a pin, a working device supported by the swing post so as to be able to be raised and lowered, and driven by an actuator; the upper swing body; and an actuator of the working device; And a hydraulic hose provided between the two.

In order to solve the above-mentioned problem, the feature of the configuration adopted by the invention of claim 1 is that the swing post is provided with an actuator bracket to which an actuator for swinging the swing post is attached, A hose insertion port that is located on the opposite side of the right direction and through which the hydraulic hose is inserted is provided. A hose guide that guides the hydraulic hose with reduced sliding resistance when the hydraulic hose contacts the hose insertion port. The swing post includes a rear plate swingably attached to the bracket of the swivel frame via a connecting pin, and a left that protrudes forward from the left and right sides of the rear plate to the front, and a base end side of the work device is attached. A right side plate, and the actuator bracket is provided between one side plate and the rear plate of the left and right side plates, A hose insertion port is provided at the corner of the corner between the other side plate and the rear plate and is opened at the corner by notching the swing post, and the hose guide is connected to the hose insertion port. In the whole inner surface, the structure is provided on the inner surface near the rear plate on the connection pin side .

According to the second aspect of the present invention, the other side plate of the swing post has a configuration in which a peripheral portion of the hose insertion opening is raised to provide a built-up portion.

According to the invention of claim 3 , the hose guide is configured to be integrally attached to the swing post using a screw member.

  According to the invention of claim 1, when the hydraulic hose is passed through the hose insertion port of the swing post, or when the swing post swings and the hydraulic hose is pulled or loosened, the hydraulic hose contacts the hose insertion port. try to. At this time, the hose guide provided at the hose insertion port can be guided while sliding the hydraulic hose.

  As a result, frictional contact between the hydraulic hose and the hose insertion port (swing post) can be prevented, so wear of the hydraulic hose, damage to the swing post, etc. can be prevented, and reliability and life can be improved. it can. In addition, when the hydraulic hose is passed through the hose insertion port, it can be easily handled, and assembly workability and the like can be improved.

Also , since the hydraulic hose is pulled or loosened around the connecting pin when the swing post is swung, the hose guide provided on the inner surface near the rear plate smoothly guides the hydraulic hose around the connecting pin. can do. As a result, damage such as wear of the hydraulic hose can be prevented, and workability at the time of installation can be improved. In addition, since the hose guide can be formed compactly within a range that functions sufficiently, the manufacturing cost can be reduced.

Furthermore , since the hydraulic hose is arranged close to the rear plate side of the swing post, the movement of the hydraulic hose when the swing post swings left and right is the hose guide provided at the hose insertion port. it is possible to smoothly guided by. Therefore, frictional contact between the hydraulic hose and the hose insertion port can be prevented.

According to the second aspect of the present invention, the build-up portion reduces the hose insertion port without hindering the insertion of the hydraulic hose and forms the reinforcing rib, so that the strength of the swing post can be improved.

According to the invention of claim 3 , the hose guide can be integrally attached to the hose insertion port, and the appearance can be improved. Further, the hose guide can be easily attached to and detached from the swing post by the screw member.

  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 construction machine, and a body of 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 turn. And the upper revolving body 3. A working device 4 is provided on the front side of the upper swing body 3 so as to be able to swing and elevate.

  Here, the working device 4 includes a boom 4A attached to a swing post 12, which will be described later, an arm 4B attached to the tip of the boom 4A, and an arm 4B attached to the tip of the boom 4A. The bucket 4C is pivotally attached to the bucket 4C. A boom cylinder 4D is provided between the swing post 12 and the boom 4A, an arm cylinder 4E is provided between the boom 4A and the arm 4B, and a bucket cylinder 4F is provided between the arm 4B and the bucket 4C. These cylinders 4D, 4E and 4F constitute an actuator. Further, the working device 4 is provided with a hydraulic pipe group 4G including a plurality of hydraulic pipes extending along the rear surface of the boom 4A and connected to the boom cylinder 4D, the arm cylinder 4E, and the bucket cylinder 4F.

  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. 2). The upper swing body 3 includes a swing frame 5, a swing post 12, a hydraulic hose group 26, a driver seat 29, an engine, a control valve device (all not shown) and the like which will be described later.

  Reference numeral 5 denotes a revolving frame constituting a support structure for the upper revolving structure 3, and the revolving frame 5 has a flat plate shape extending in the front and rear directions in the middle in the left and right directions, as shown in FIGS. A bottom plate 6, a pair of vertical plates 7, 7 erected on the upper surface side of the bottom plate 6 so as to be separated from each other left and right; a front beam 8 positioned on the front side and extending left and right; A middle beam 9 extending leftward and rightward at the rear position of the vertical plate 7, an engine support portion 10 provided on the bottom plate 6 positioned on the rear side of the middle beam 9, and a front end of each vertical plate 7 The support bracket 11 provided on the side is roughly configured.

  Here, as shown in FIGS. 5 and 6, the support bracket 11 supports the swing post 12 so as to be swingable in the left and right directions via a connecting pin 21 described later. Further, the support bracket 11 is formed as a cylindrical body whose axis is directed upward and downward using, for example, casting, and is integrally fixed to the bottom plate 6 and the distal ends of the left and right vertical plates 7 by fixing means such as welding. Has been. Further, a pin hole 11A into which the connecting pin 21 is inserted is provided in the center portion of the support bracket 11 so as to penetrate in the upward and downward directions.

  Further, the outer peripheral side of the support bracket 11 is a drum-shaped body portion 11B by reducing the upper and lower intermediate portions into a drum shape. The drum-shaped body portion 11 </ b> B has a function of enlarging a space through which a hydraulic hose group 26 described later passes the side of the support bracket 11.

  A swing post 12 is attached to the support bracket 11 of the swivel frame 5, and the swing post 12 is connected to the support bracket 11 via a connecting pin 21, and the left and right directions are centered on the connecting pin 21. It can swing. Further, the swing post 12 is integrally formed by casting or the like, for example, and supports the boom 4A of the work device 4 so as to be able to move up and down.

  As shown in FIGS. 5 to 9, the swing post 12 includes a rear plate 13, a left side plate 14, a right side plate 15, a cylinder bracket 16, a hose accommodating space 17, a hose insertion port 18, a built-up portion 19, etc. It is roughly constituted by.

  Reference numeral 13 denotes a rear plate attached to the support bracket 11. The rear plate 13 is formed by bending in a U-shape so as to sandwich the support bracket 11 from above and below. Further, the upper and lower ends of the rear plate 13 are an upper mounting portion 13A and a lower mounting portion 13B that extend horizontally toward the rear. Further, pin insertion holes 13A1, 13B1 into which connecting pins 21 described later are inserted are formed in the upper mounting portion 13A and the lower mounting portion 13B so as to be coaxial with the pin hole 11A of the support bracket 11. .

  Reference numeral 14 denotes a left side plate that protrudes forward from the left side of the rear side plate 13, and a boom boss 14 </ b> A to which a base end side of the boom 4 </ b> A constituting the work device 4 is pin-coupled at an upper position of the left side plate 14. Is provided. Further, a boom cylinder boss 14 </ b> B projecting inward is provided at a position closer to the lower side of the left side plate 14 and to which a base end side of a boom cylinder 4 </ b> D constituting the work device 4 is pin-coupled.

  Reference numeral 15 denotes a right side plate that protrudes forward from the right side of the rear side plate 13. Like the left side plate 14, the right side plate 15 is provided with a boom boss 15 </ b> A at the upper position, and close to the lower side. The boom cylinder boss 15B is located inwardly and protrudes inward.

  Reference numeral 16 denotes a cylinder bracket 16 as an actuator bracket protruding to the right side of the swing post 12, and the cylinder bracket 16 is formed by two plates extending in parallel to the right side from between the rear plate 13 and the right side plate 15. Yes. A rod 22B tip of a swing cylinder 22, which will be described later, is attached to the tip of the cylinder bracket 16.

  Reference numeral 17 denotes a hose accommodating space provided in the swing post 12 (see FIGS. 5 and 6). The hose accommodating space 17 accommodates a hydraulic hose group 26 described later, and the swing post 12 swings leftward. When this occurs, the hydraulic hose group 26 is formed as a space that allows it to loosen. The hose housing space 17 is configured as a space in which the rear side and the left and right sides are surrounded by the rear plate 13 and the left and right side plates 14 and 15 and the front side is limited by a hose protection cover 24 described later. ing.

Reference numeral 18 denotes a hose insertion port which is located at a corner between the rear surface plate 13 and the left side plate 14 and is formed in the corner by opening the swing post 12. A hydraulic hose group 26 (described later) extending from a control valve device (not shown) mounted on the swing frame 5 is configured as a substantially rectangular opening that passes through the hose accommodating space 17 in the swing post 12.

  Further, as shown in FIG. 9, the hose insertion port 18 is located on the upper side and extends in the left, right direction, front, and rear direction over the rear surface plate 13 and the left surface plate 14, and has a substantially L-shaped upper inner surface 18A. A substantially L-shaped lower inner surface 18B that extends in the left, right, front, and rear directions over the rear plate 13 and the left side plate 14 located on the lower side, and the front end of the upper inner surface 18A that is located on the left side plate 14 A front inner surface 18C extending upward and downward between the front portion and the front end portion of the lower inner surface 18B, and an upper portion between the right end portion of the upper inner surface 18A and the right end portion of the lower inner surface 18B located on the rear plate 13 , And a rear inner surface 18D extending downward.

  Reference numeral 19 denotes a built-up portion provided on the left side plate 14 of the swing post 12, and the built-up portion 19 extends along the peripheral edge of the lower left inner surface 18 </ b> B constituting the hose insertion port 18 and the front inner surface 18 </ b> C. And is formed as a substantially U-shaped rib protruding from the left side plate 14 to the outside in the left and right directions.

  Further, as shown in FIG. 10, the lower portion of the build-up portion 19 covers the hose insertion port 18 so as to be continuous with the lower inner surface 18B of the hose insertion port 18. As a result, the built-up portion 19 can have a function as a reinforcing rib and a function of forming the hose insertion port 18 small without hindering the insertion of the hydraulic hose group 26, thereby increasing the strength of the swing post 12. Can be increased.

  Reference numeral 20 denotes a plurality of screw holes provided at positions corresponding to the hose insertion port 18. The screw holes 20 are, for example, the rear inner surface 18D of the hose insertion port 18, the upper position and the lower side of the built-up portion 19. It is formed in three places. A mounting screw 28 for attaching a hose guide 27 described later is screwed into each screw hole 20.

  Reference numeral 21 denotes a connection pin (shown in FIG. 6) that connects the support bracket 11 of the swing frame 5 and the swing post 12 in a swingable manner (shown in FIG. 6). The connection pin 21 is a single pin that extends upward and downward. It is configured to be inserted upward and downward across the pin insertion holes 13A1, 13B1 of the rear plate 13 constituting the swing post 12 and the pin holes 11A of the support bracket 11 constituting the turning frame 5. . Thereby, the connecting pin 21 is attached to the front end portion of the swing frame 5 so that the swing post 12 can swing leftward and rightward.

  Reference numeral 22 denotes a swing cylinder provided between the swing frame 5 and the swing post 12, and the swing cylinder 22 extends forward and backward as shown by a dotted line in FIG. The bottom side is pin-coupled to the revolving frame 5 and the tip side of the rod 22B is pin-coupled to the cylinder bracket 16 of the swing post 12. The swing cylinder 22 can swing the swing post 12 to the right about the connecting pin 21 by reducing the rod 22B. Further, the swing post 12 can be swung to the left by extending the rod 22B.

  An attachment plate 23 is provided on the upper side of the swing post 12, and the attachment plate 23 is attached to the upper attachment portion 13 </ b> A of the rear plate 13 constituting the swing post 12. The attachment plate 23 attaches a hose protection cover 24 and a hose clamp 25 described later to the swing post 12.

  Reference numeral 24 denotes a hose protection cover that covers the front side of the hose housing space 17. The hose protection cover 24 protects the hydraulic hose group 26 in the hose housing space 17 from flying stones and the like. As shown in FIGS. 6 and 7, the hose protection cover 24 is formed, for example, by bending a thin steel plate, and the upper side is attached to the mounting plate 23 and the lower side is attached to the lower mounting portion 13B. Yes.

  Reference numeral 25 denotes a hose clamp provided on the upper side of the swing post 12. The hose clamp 25 is attached to the attachment plate 23 together with the hose protection cover 24. The hose clamp 25 holds a hydraulic hose group 26, which will be described later, in an aligned state in the left and right directions.

  The hose clamp 25 holds the hydraulic hose group 26 at a position closer to the upper side of the swing post 12, so that the hydraulic hose group 26 swings the swing post 12 in the hose accommodating space 17. The hydraulic hose group 26 can be moved in the upward and downward directions on the working device 4 side so as to follow the vertical movement of the working device 4. Thus, the hose clamp 25 distinguishes the moving direction of the hydraulic hose group 26 and suppresses rubbing against each other.

  On the other hand, reference numeral 26 denotes a plurality of hydraulic hoses (collectively referred to as a hydraulic hose group 26) extending from a control valve device (not shown) mounted on the swing frame 5 toward the working device 4. Are two hydraulic hoses 26 for supplying and discharging pressure oil to and from the boom cylinder 4D, two hydraulic hoses 26 for supplying and discharging pressure oil to and from the arm cylinder 4E, and pressure oil to the bucket cylinder 4F. In addition to the two hydraulic hoses 26 for supplying / discharging, for example, two spare hydraulic hoses 26 for supplying / discharging pressure oil to / from an external hydraulic device (not shown) such as a rock drill, for example, are added. It is composed of a book hydraulic hose.

  Here, the hydraulic hose 26 is wound with, for example, a large number of steel wires around the outer peripheral side of an oil-resistant rubber tube so that it can withstand a high pressure, and further, the outer peripheral side of the rubber hose 26 (not shown) ). The proximal end side of the hydraulic hose group 26 is connected to the control valve device, and the distal end side (excluding the spare hydraulic hose 26) is connected to the hydraulic piping group 4G of the work device 4. Further, the hydraulic hose group 26 has a midway portion 26 </ b> A that passes through the left side of the drum-shaped body 11 </ b> B of the support bracket 11 and enters the hose housing space 17 from the hose insertion port 18 of the swing post 12. Furthermore, the hydraulic hose group 26 that has entered the hose accommodating space 17 rises in the hose accommodating space 17 and is held by the upper hose clamp 25.

  Next, 27 is a hose guide provided in the hose insertion port 18, and the hose guide 27 smoothly guides the hydraulic hose group 26 with reduced sliding resistance when the hydraulic hose group 26 comes into contact. Is. The hose guide 27 is formed of a resin material having self-lubricating properties such as polytetrafluoroethylene (PTFE) and polypropylene (PP).

And the hose guide 27 is provided in the rear side part used as the connection pin 21 side among the whole inner surfaces of the hose insertion opening 18, ie, the inner surface near the rear plate 13 side. Specifically, as shown in FIG. 11, the hose guide 27 includes an upper guide portion 27 </ b> A extending in the left and right directions along the rear half of the upper inner surface 18 </ b> A of the hose insertion port 18, and the lower inner surface of the hose insertion port 18. A substantially L-shaped lower guide portion 27B extending in the forward, rearward, left, and right directions along 18B, and a right end portion and a lower portion of the upper guide portion 27A along the rear inner surface 18D of the hose insertion port 18 It is formed in a substantially U shape by a rear guide portion 27C extending upward and downward between the right end portion of the side guide portion 27B. Further, the front portion of the lower guide portion 27B is formed in an arc shape corresponding to the lower inner surface 18B.

  Further, the upper guide portion 27A, the lower guide portion 27B, and the rear guide portion 27C are made of, for example, a narrow plate, and the inner corners are arcuate so that the hydraulic hose group 26 can guide more smoothly. It is chamfered.

  On the other hand, an upper mounting piece 27D that faces the upper part of the built-up portion 19 is formed on the left end portion of the upper guide portion 27A so as to extend upward, and on the front side of the lower guide portion 27B, A lower mounting piece 27E facing the side portion is formed extending downward. The hose guide 27 is formed with insertion holes 27F in the rear guide portion 27C, the upper mounting piece 27D, and the lower mounting piece 27E so as to correspond to the screw holes 20 on the swing post 12 side.

  The hose guide 27 is inserted into the insertion hole 27F through a mounting screw 28 (described later) and screwed into the screw hole 20, so that the upper guide portion 27A, the lower guide portion 27B, and the rear guide portion 27C are connected to the hose insertion port. 18 can be integrally attached to the swing post 12 so as to be in close contact with the upper inner surface 18A, the lower inner surface 18B, and the rear inner surface 18D. As a result, the appearance can be improved, and there is no possibility of being caught during work.

  Reference numeral 28 denotes three attachment screws for attaching the hose guide 27 to the swing post 12. Each attachment screw 28 is inserted into an insertion hole 27F of the swing post 12 as shown in FIG. The hose guide 27 is integrally fixed to the swing post 12 by being screwed to the swing post 12. Further, the hose guide 27 can be easily removed (replaced) by loosening each mounting screw 28.

  A driver seat 29 is provided on the revolving frame 5 and is seated by an operator (see FIG. 1), and the upper portion of the driver seat 29 is covered with a canopy 30. Further, the rear side, the right side, etc. of the canopy 30 are covered with an exterior cover 31.

  The hydraulic excavator 1 according to the present embodiment has the above-described configuration. Next, the operation when the side groove digging work is performed using the working device 4 and the movement of the hydraulic hose group 26 at this time will be described.

  First, when the working device 4 is moved to the left side of the lower traveling body 2 to perform the side groove digging operation, the rod 22B of the swing cylinder 22 is reduced to swing the swing post 12 to the right side, and the upper revolving body 3 is operated. The working device 4 is translated to the left side by turning to the left side opposite to the swinging direction of the device 4, and the left side grooving operation is performed using the working device 4. On the other hand, when the working device 4 is moved to the right side of the lower traveling body 2 to perform the side grooving work, the working device 4 is used by swinging the swing post 12 to the left side and turning the upper turning body 3 to the right side. Do the right side ditching.

  Here, when the swing post 12 is swung in the left and right directions, the hydraulic hose group 26 is loosened or pulled. At this time, since the hose guide 27 is provided in the hose insertion port 18, the hose guide 27 smoothly guides the middle portion 26 </ b> A of the hydraulic hose group 26, and the hydraulic hose group 26, the hose insertion port 18, It is possible to prevent frictional contact.

  Moreover, the hose guide 27 can prevent the hydraulic hose group 26 from being caught by frictional contact even during assembly work in which the hydraulic hose group 26 is passed through the hose insertion port 18.

  Thus, according to the present embodiment, when the hydraulic hose group 26 comes into contact with the inner surface of the hose insertion opening 18 of the swing post 12, smooth guidance is provided with the sliding resistance of the hydraulic hose group 26 reduced. The hose guide 27 is provided. Accordingly, when the hydraulic hose group 26 is passed through the hose insertion port 18 or when the swing post 12 swings and the hydraulic hose group 26 is pulled or loosened, the hose guide 27 smoothly guides the hydraulic hose group 26. can do.

  As a result, the hose guide 27 can prevent the hydraulic hose group 26 and the hose insertion port 18 (swing post 12) from being in frictional contact with each other. Can be prevented, and reliability and life can be improved. Further, when the hydraulic hose group 26 is passed through the hose insertion port 18, it can be easily handled, and the assembly workability and the like can be improved.

  Further, since the hose guide 27 is formed in a substantially U-shape and is disposed near the rear plate 13 on the connecting pin 21 side, the hose guide 27 is hydraulically provided only by being partially provided in the hose insertion port 18. The hose group 26 can be smoothly guided. Thereby, the hose guide 27 can be formed compactly, the workability | operativity at the time of attachment can be improved, and manufacturing cost can be reduced.

  Further, the swing post 12 is configured to have a built-up portion 19 by raising the peripheral edge portion of the hose insertion port 18. Therefore, by providing the build-up portion 19 so as to cover the hose insertion port 18, the build-up portion 19 can reduce the hose insertion port 18 without hindering the insertion of the hydraulic hose group 26. Further, the built-up portion 19 also functions as a reinforcing rib. Thereby, the build-up portion 19 can improve the strength of the swing post 12.

  Furthermore, since the hose guide 27 is configured to be attached to the swing post 12 using the attachment screw 28, the hose guide 27 can be integrally attached to the hose insertion port 18. As a result, the appearance can be improved and the hose guide 27 can be easily attached and detached.

  In the embodiment, the case where the hose insertion port 18 is provided on the left side of the swing post 12 has been described as an example. However, the present invention is not limited to this. For example, when the position where the hydraulic hose group 26 is pulled out from the upper swing body 3 is on the right side of the support bracket 11, the hose insertion port 18 is provided on the right side of the swing post 12. What is necessary is just composition.

  In the embodiment, the hose insertion port 18 is described as being provided at the corner between the rear plate 13 and the left side plate 14 of the swing post 12. However, the present invention is not limited to this, and for example, the hose insertion port 18 is provided. The opening 18 may be provided only on the rear face plate 13 or only on the left side face plate 14.

  In the embodiment, the hose guide 27 is described as being attached to the hose insertion opening 18 (swing post 12) using the attachment screw 28. However, the present invention is not limited to this. It may be configured to be attached using a rivet, a one-touch fastener, or the like, or may be attached using an adhesive, a double-sided tape, or the like.

  In the embodiment, the canopy-type hydraulic excavator 1 in which the canopy 30 is mounted on the revolving frame 5 is described as an example of the construction machine. However, the present invention is not limited to this, and may be applied to a cab specification hydraulic excavator including a cab that covers the periphery of the driver's seat.

  Furthermore, the embodiment can be widely applied to other construction machines provided with a swing post.

It is a front view which shows the hydraulic excavator applied to embodiment of this invention. FIG. 2 is a plan view of the hydraulic excavator in FIG. 1. It is a front view which expands and shows a turning frame. It is a top view which expands and shows a turning frame and a support bracket. It is an enlarged front view which expands and shows a support bracket, a swing post, a hydraulic hose group, a hose guide, and the like. FIG. 6 is a cross-sectional view of the support bracket, swing post, hydraulic hose group, hose guide, and the like as seen from the direction of arrows VI-VI in FIG. 5. It is an external appearance perspective view which expands and shows the state which attached the hose guide etc. to the swing post from the front side. It is an external appearance perspective view which expands and shows the state which attached the hose guide etc. to the swing post from the rear side. It is a disassembled perspective view which expands and shows the state which decomposed | disassembled the hose guide from the swing post from the rear side. It is the principal part expanded sectional view which looked at the build-up part of the swing post, and the hose insertion port from the arrow XX direction in FIG. It is an external appearance perspective view which expands and shows a hose guide alone.

Explanation of symbols

1 Excavator (construction machine)
2 Lower traveling body 3 Upper revolving body 4 Working device 4D Boom cylinder (actuator)
4E Arm cylinder (actuator)
4F Bucket cylinder (actuator)
5 Revolving frame 11 Support bracket 12 Swing post 13 Rear plate 14 Left side plate 15 Right side plate 16 Cylinder bracket (actuator bracket)
17 Hose accommodating space 18 Hose insertion port 18A Upper inner surface 18B Lower inner surface 18C Front inner surface 18D Rear inner surface 19 Overlay portion 21 Connecting pin 22 Swing cylinder (actuator)
26 Hydraulic hoses (hydraulic hoses)
26A Middle part 27 Hose guide 27A Upper guide part 27B Lower guide part 27C Rear guide part 28 Mounting screw (screw member)

Claims (3)

Lower swing body, upper swing body having a swing frame mounted on the lower travel body so as to be pivotable and having a bracket on the front end side, and swingable to the left and right via a connecting pin to the bracket of the swivel frame A swing post coupled to the swing post, a working device supported by the swing post so as to be able to move up and down, and driven by an actuator, and a hydraulic hose provided between the upper swing body and the actuator of the working device. In a swivel construction machine comprising
The swing post is provided with an actuator bracket to which an actuator for swinging the swing post is attached, and a hose insertion port through which the hydraulic hose is inserted and located on the opposite side of the actuator bracket to the left and right directions,
The hose insertion port is provided with a hose guide that guides the hydraulic hose when the hydraulic hose comes into contact with the sliding resistance of the hydraulic hose reduced ,
The swing post includes a rear plate that is swingably attached to the bracket of the swivel frame via the connecting pin, and a left that protrudes forward from both the left and right sides of the rear plate and to which the base end side of the working device is attached. , With the right side plate,
The actuator bracket is provided between one of the left and right side plates and the rear plate,
The hose insertion opening is provided at the corner of the corner plate by notching the swing post located at the corner of the corner between the other side plate and the rear plate,
The swivel construction machine is characterized in that the hose guide is provided on the inner surface of the entire inner surface of the hose insertion port near the rear plate on the connection pin side . The swivel construction machine according to claim 1, wherein the other side plate of the swing post is configured to provide a built-up portion by raising a peripheral portion of the hose insertion port. The swivel construction machine according to claim 1 or 2, wherein the hose guide is configured to be integrally attached to the swing post using a screw member.

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