JP2016188547A - Revolving work machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a revolving work machine capable of preventing hydraulic hoses from being rubbed with each other, and capable of elongating the service life of the hydraulic hoses.SOLUTION: A revolving work machine includes a plurality of hydraulic hoses extended along a first boom pivoted on a machine body, and a plurality of oil-delivery pipes made of a rigid material, and the oil-delivery pipes have a first pipe group and a second pipe group. The first pipe group is extended from a base end side of the first boom to a front and back half-way portion along an upper wall of the first boom, bent outward on the upper wall in the half-way portion, and is extended along one side wall, and the second pipe group is extended from the base end side of the first boom to a distal end side along the upper wall. A base end of a first hose group composed of the prescribed number of the hydraulic hoses is connected to the first pipe group.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a turning work machine such as a backhoe.

  Conventionally, a fuselage, a first boom pivotally supported by the fuselage so as to swing up and down, a second boom pivotably supported by the first boom in the fuselage width direction, and a second boom in the fuselage width direction. 2. Description of the Related Art A turning work machine is known that includes a third boom pivotally supported so that a work tool such as a bucket is attached to the tip of the third boom via an arm. Normally, in such a turning work machine, a hydraulic hose for supplying hydraulic oil to an actuator for driving a work tool is arranged along one side surface of the first to third booms. However, in such a turning work machine, when the first boom is swung up and down, the hydraulic hose arranged along the side surface of the first boom may come into contact with the bonnet and wear. There was a problem.

  On the other hand, Patent Document 1 discloses a turning work machine in which a hydraulic hose is disposed along the upper surface of a first boom. According to this disclosed technology, since the hydraulic hose is disposed along the upper surface of the first boom, it is possible to prevent the hydraulic hose and the bonnet from coming into contact when the first boom is swung up and down.

JP 2010-180611 A

  The swing working machine disclosed in Patent Document 1 includes a service hose for a service port for mounting other work tools instead of or in addition to a work tool such as a bucket. The hydraulic hose is routed along the upper surface of the first boom. For this reason, when a work tool that generates severe vibration when using a breaker or the like is mounted as another work tool, the service hose may pulsate and rub against other hydraulic hoses.

  The present invention has been made to solve such problems, and provides a turning work machine capable of preventing the hydraulic hoses from rubbing and extending the life of the hydraulic hoses. Is.

The present invention is characterized by taking the following technical means in order to solve the above problems.
The invention according to claim 1 is an aircraft, a first boom pivotally supported by the aircraft, and a second boom pivotally supported by the first boom so as to be swingable in the aircraft width direction. A third boom pivotally supported by the second boom so as to be swingable in the body width direction, a plurality of hydraulic hoses extending along the second boom, and a plurality of oil feed pipes made of a rigid material And the first boom has a pair of side walls disposed opposite to each other, an upper wall connecting the upper parts of the pair of side walls, and a lower wall connecting the lower parts of the pair of side walls, The plurality of oil feeding pipes include a first pipe group that is a predetermined number of oil feeding pipes and a second pipe group that is another oil feeding pipe different from the first pipe group, and the first pipe The group extends from the base end side of the first boom along the upper wall to the middle part of the front and rear, The middle part is bent outwardly of the upper wall and extends along the one side wall, and the second pipe group extends from the base end side of the first boom along the upper wall. It is a turning work machine extended toward the front end side, and a base end portion of a first hose group which is a predetermined number of the hydraulic hoses is connected to the first pipe group.

According to a second aspect of the present invention, the first pipe group is connected to the first hose group at a distal end portion of the one side wall corresponding to a distal end portion of the first boom, and the second pipe group is The tip of the upper wall corresponding to the tip of the first boom is connected to a second hose group that is a hydraulic hose different from the first hose group.
According to a third aspect of the present invention, the second boom is provided with a hose guide for separately holding the first hose group and the second hose group.

  According to a fourth aspect of the present invention, the second boom has a pair of side plates disposed opposite to each other, and the hose guide extends laterally from one side plate of the second boom in the body width direction. A first vertical rod portion extending upward from an extending end of the horizontal rod portion, and a second vertical rod portion extending upward from a middle portion of the horizontal rod portion, the first hose group Is held by the horizontal bar part, the first vertical bar part and the second vertical bar part, and the second hose group is held by the horizontal bar part and the second vertical bar part.

  The invention which concerns on Claim 5 is provided with the arm provided in the front-end | tip part of the said 3rd boom, and the said 1st hose group replaced with the said work tool, and other working tools with which the front-end | tip part of the said arm was mounted | worn. The hydraulic hose supplies hydraulic oil to an actuator to be driven, and the second hose group is a hydraulic hose that supplies hydraulic oil to an actuator that drives a working tool attached to a distal end portion of the arm.

  In a sixth aspect of the present invention, a bracket is provided on the side plate of the third boom, and a tip end portion of the first hose group is connected to the bracket.

  A turning work machine according to the present invention includes a machine body, a first boom pivotally supported by the machine body so as to swing up and down, a second boom pivotally supported by the first boom so as to swing in the machine body width direction, A third boom pivotally supported by the two booms so as to be swingable in the body width direction; a plurality of hydraulic hoses extending along the second boom; and a plurality of oil feed pipes made of a rigid material The first boom has a pair of opposing side walls, an upper wall that connects the upper portions of the pair of side walls, and a lower wall that connects the lower portions of the pair of side walls. A first pipe group that is a predetermined number of oil feeding pipes, and a second pipe group that is another oil feeding pipe different from the first pipe group, and the first pipe group includes a first pipe group along the upper wall. 1 Boom extends from the base end side of the boom to the middle part of the front and rear, and is bent toward the outside of the upper wall at the middle part The second pipe group extends along the one side wall, extends from the base end side of the first boom toward the tip end side along the upper wall, and is a predetermined number of hydraulic hoses. A base end portion of one hose group is connected to the first pipe group. Therefore, rubbing between the hydraulic hoses can be prevented, and the life of the hydraulic hoses can be extended.

It is a right back perspective view showing the 1st boom, the 2nd boom, and the 3rd boom. It is a principal part enlarged view of FIG. It is XX sectional drawing of FIG. It is YY sectional drawing of FIG. It is the figure which removed the hose cover in FIG. It is a figure which shows arrangement | positioning of a hose guide. It is a left view of a turning work machine. It is a front view of a turning work machine.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
7 and 8 are schematic views showing the overall configuration of the turning work machine 1 according to the present invention, and an ultra-small turning type backhoe is illustrated.
The turning work machine 1 includes a body 2, a cabin 3, a traveling device 4, and a work device 5.
Hereinafter, the front side (left side in FIG. 7) of the driver seated in the driver's seat 7 of the cabin 3 is front, the rear side (right side in FIG. 7) is rearward, and the left side (front side in FIG. 7) of the driver. The left side and the right side of the driver (the back side in FIG. 7) will be described as the right side. Further, the horizontal direction K2 (see FIG. 8), which is a direction orthogonal to the front-rear direction K1 (see FIG. 7), will be described as the body width direction.

The airframe 2 has a swivel 6 supported on the frame of the traveling device 4. The swivel base 6 is supported through a bearing so as to be turnable to the left and right around a turning axis in the vertical direction. A working device 5 is attached to the right front portion of the swivel base 6.
The cabin 3 is mounted on the left front portion of the swivel base 6 on the body 2. A driver's seat 7 is provided inside the cabin 3.

The traveling device 4 is a crawler-type traveling device, and is provided below the right side and the left side of the body 2. A dozer 29 is provided at the front of the traveling device 4.
The work device 5 includes a first boom 8, a second boom 9, a third boom 10, an arm 11, and a work tool 12. Further, the work device 5 includes a boom cylinder 13, an offset cylinder 14, an offset link 15, an arm cylinder 16, and a work tool cylinder 17 as a drive mechanism (actuator or the like) such as a boom.

The boom cylinder 13, the offset cylinder 14, the arm cylinder 16, and the work tool cylinder 17 are constituted by hydraulic cylinders.
The base end portion of the first boom 8 is pivotally supported to the right of the cabin 3 on the swivel base 6. A base end portion of the second boom 9 is pivotally supported at a distal end portion of the first boom 8 via a first longitudinal axis 18. A proximal end portion of the third boom 10 is pivotally supported at the distal end portion of the second boom 9 via a second longitudinal axis 19. A proximal end portion of the arm 11 is pivotally supported at the distal end portion of the third boom 10 via a horizontal shaft 20. A work tool is attached to the tip of the arm 11. In this embodiment, the bucket 12 is mounted as a work tool. However, instead of or in addition to the bucket 12, another work tool (hereinafter referred to as another work tool) can be mounted. . Examples of other work tools include a hydraulic breaker, a hydraulic crusher, an angle bloom, an earth auger, a pallet fork, a sweeper, a mower, and a snow blower.

The base end of the boom cylinder 13 is pivotally supported to the right of the cabin 3 on the swivel base 6. The tip of the boom cylinder 13 is pivotally supported near the tip of the first boom 8. The first boom 8 swings up and down by the expansion and contraction of the boom cylinder 13.
An offset cylinder 14 is provided between the first boom 8 and the second boom 9. On one side surface (left side surface) of the middle portion of the second boom 9 in the longitudinal direction, a bracket portion 21 that connects the tip portion of the offset cylinder 14 is projected. On one side surface (left side surface) of the distal end portion of the first boom 8, a support portion 22 that connects the proximal end portion of the offset cylinder 14 is projected.

  The offset cylinder 14 has a piston rod 14a and a cylinder tube 14b. The tip of the piston rod 14a is connected to the bracket portion 21 of the second boom 9 via a pin P2. The base end portion of the cylinder tube 14b is connected to the support portion 22 of the first boom 8 via a pin P1. The second boom 9 swings in the width direction of the machine body 2 by the expansion and contraction of the offset cylinder 14.

An offset link 15 is provided between the first boom 8 and the third boom 10. A bracket portion 23 projects from one side surface (left side surface) of the third boom 10. One end portion of the offset link 15 is connected to the support portion 22 via a pin P1. The other end portion of the offset link 15 is connected to the bracket portion 23 via a pin P3.
The offset link 15 is disposed substantially parallel to the second boom 9. The offset link 15 and the second boom 9 constitute a four-joint link mechanism in which the first longitudinal axis 18, the second longitudinal axis 19, the pin P1 and the pin P2 are four joints.

The offset cylinder 14 and the offset link 15 are disposed on one side (left side) of the second boom 9. The third boom 10 swings in the width direction of the machine body 2 by the expansion and contraction of the offset cylinder 14.
An arm cylinder 16 is provided between the third boom 10 and the arm 11. The arm 11 swings up and down around the horizontal axis 20 by the expansion and contraction of the arm cylinder 16.

A bucket cylinder 17 is provided between the arm 11 and the bucket 12. The bucket 12 performs a squeeze / dump operation by the expansion and contraction of the bucket cylinder 17.
Hereinafter, specific configurations of the first boom 8, the second boom 9, and the third boom 10 will be described.
As shown in FIGS. 1 and 6 and the like, the first boom 8 has a pair of side walls 8R and 8L, an upper wall 8U and a lower wall 8D, and is formed in a substantially rectangular tube shape. The pair of side walls 8R, 8L have a right side wall 8R disposed on one side (right side) in the body width direction and a left side wall 8L disposed on the other side (left side) in the body width direction. The right side wall 8R and the left side wall 8L are formed in a shape of a side view and are opposed to the left and right. The upper wall 8U and the lower wall 8D face each other vertically and connect the right side wall 8R and the left side wall 8L.

As shown in FIGS. 2 and 7, a bearing portion 24 that supports the first vertical axis 18 is formed at the tip of the first boom 8. A support portion 22 projects from one side surface (left side surface) of the bearing portion 24.
A plurality of oil feeding pipes are arranged on the upper surface of the upper wall 8U of the first boom 8. The plurality of oil feeding pipes include a first pipe group that is a predetermined number of oil feeding pipes and a second pipe group that is another oil feeding pipe different from the first pipe group.

As shown in FIG. 1, FIG. 2, etc., the first pipe group is two first oil feed pipes 30a. The second pipe group includes two second oil feed pipes 30b, two third oil feed pipes 30c, and two fourth oil feed pipes 30d. The first to fourth oil feed pipes 30a to 30d are pipes formed of a rigid material such as a metal pipe.
The first oil feed pipe 30a circulates hydraulic oil supplied to an actuator that drives another work tool (hereinafter referred to as a spare actuator). The second oil feed pipe 30 b circulates the hydraulic oil supplied to the bucket cylinder 17. The third oil feed pipe 30 c circulates hydraulic oil supplied to the arm cylinder 16. The fourth oil feed pipe 30d circulates the hydraulic oil supplied to the offset cylinder 14.

  The two pipes constituting the first to fourth oil feed pipes 30a to 30d are a hydraulic oil feed pipe and a return pipe, respectively. The feed pipe feeds hydraulic oil from a hydraulic pump (not shown) mounted on the machine body 2 to an actuator (bucket cylinder 17, arm cylinder 16, offset cylinder 14, spare actuator). The return pipe returns the hydraulic oil from the actuator to the hydraulic pump.

  As shown in FIG. 1 and FIG. 2, fixing for fixing the first oil feed pipe 30 a near the tip of one side wall (right side wall 8 </ b> R) of the first boom 8 (near the second boom 9). A part 32 is provided. The fixing portion 32 is a metal bracket having a through hole through which the first oil feed pipe 30a is inserted. The fixed portion 32 is welded to the upper portion of one side surface (right side surface) of one side wall (right side wall 8R).

As shown in FIG. 1, the second oil feed pipe 30 b, the third oil feed pipe 30 c, and the fourth oil feed pipe 30 d are fixed to the upper surface of the upper wall 8 </ b> U by the first fixture 26. The first oil feed pipe 30a is fixed to the upper surface of the upper wall 8U by the second fixture 27.
The second oil feed pipe 30b, the third oil feed pipe 30c, and the fourth oil feed pipe 30d are extended from the base end side of the first boom 8 toward the tip end side along the upper wall 8U. The second to fourth oil feed pipes 30b to 30d are arranged along the upper surface of the upper wall 8U over the entire length from the base end portion to the tip end portion.

The first oil feed pipe 30a extends from the base end side of the first boom 8 to the middle part of the front and rear along the upper wall 8U, and toward the outside (right side) of the upper wall 8U in the middle part. It bends and extends along one side wall (right side wall 8R). The tip part which is the extended end of the first oil feed pipe 30a is fixed to a fixing part 32 provided on one side wall (right side wall 8R).
When an oil feeding rubber hose (hydraulic hose) is arranged along the side wall of the first boom 8, the rubber hose contacts the bonnet and wears when the boom is moved up and down. In contrast, in the present invention, an oil feed pipe made of a rigid material such as a metal pipe is used, and the pipe is disposed and fixed along the upper wall 8U and the side wall (right side wall 8R) of the first boom 8. Therefore, wear of the hydraulic hose can be prevented.

  As shown in FIG. 1, the base end portions of the first to fourth oil feeding pipes 30 a to 30 d are arranged on the upper surface of the upper wall 8 U of the first boom 8 and in the middle portion of the first boom 8. . The base ends of the first to fourth oil feed pipes 30a to 30d and the control valve (not shown) mounted on the swivel base 6 are hydraulic hoses 42a to 42d made of a flexible hose such as a rubber hose. Connected by.

Other hydraulic hoses different from the hydraulic hoses 42a to 42d are connected to the respective distal ends of the first to fourth oil feed pipes 30a to 30d. The other hydraulic hose has a first hose group that is a predetermined number of hydraulic hoses and a second hose group that is another hydraulic hose different from the first hose group.
As shown in FIG. 5, the first hose group is two first hydraulic hoses 31a. The second hose group includes two second hydraulic hoses 31b, two third hydraulic hoses 31c, and two fourth hydraulic hoses 31d. The first to fourth hydraulic hoses 31a to 31d are made of flexible hoses such as rubber hoses.

The proximal end portion of the first hydraulic hose 31a is connected to the distal end portion of the first oil feed pipe 30a at the distal end portion of one side wall (right side wall 8R) corresponding to the distal end portion of the first boom 8. The tip of the first hydraulic hose 31a is connected to a bracket 28 provided on one side plate (right side plate 10R) of the third boom 10.
The proximal end portion of the second hydraulic hose 31b is connected to the distal end portion of the second oil feed pipe 30b at the distal end portion of the upper wall 8U corresponding to the distal end portion of the first boom 8. The distal end portion of the second hydraulic hose 31 b is connected to the bucket cylinder 17.

The proximal end portion of the third hydraulic hose 31c is connected to the distal end portion of the third oil feed pipe 30c at the distal end portion of the upper wall 8U corresponding to the distal end portion of the first boom 8. The distal end portion of the third hydraulic hose 31 c is connected to the arm cylinder 16.
The proximal end portion of the fourth hydraulic hose 31d is connected to the distal end portion of the fourth oil feed pipe 30d at the distal end portion of the upper wall 8U corresponding to the distal end portion of the first boom 8. The distal end portion of the fourth hydraulic hose 31d is connected to the offset cylinder 14.

As shown in FIG. 2, the distal end portion of the first boom 8 has a bifurcated shape, and the bearing portion 24 provided at the distal end portion is disposed so as to sandwich the proximal end portion of the second boom 9 from above and below. Is done. An opening 25 is formed between the upper bearing portion 24 and the lower bearing portion 24.
The opening 25 is formed by the right side wall 8R, the left side wall 8L, the upper wall 8U, and the lower wall 8D at the tip of the first boom 8. The opening 25 opens to face the base end of the second boom 9 and communicates between the base end of the second boom 9 and the base end of the cylinder tube 14b. The second hydraulic hose 31b, the third hydraulic hose 31c, and the fourth hydraulic hose 31d are inserted through the opening 25.

As shown in FIG. 2, the second boom 9 has a front portion 9a, a rear portion 9b, and an intermediate portion 9c.
The intermediate portion 9c includes an upper plate 9U, a lower plate 9D, and a pair of side plates 9R and 9L, and is formed in a substantially rectangular tube shape. The upper plate 9U and the lower plate 9D face each other vertically. The pair of side plates 9R and 9L are disposed on the same side as the right side plate 9R disposed on the same side as one side wall (right side wall 8R) of the first boom 8 and the other side wall (left side wall 8R) of the first boom 8. It has a left side plate 9L. The right side plate 9R and the left side plate 9L face the left and right, and connect the upper plate 9U and the lower plate 9D.

The front portion 9a is fitted and fixed to the distal end side of the intermediate portion 9c. The rear portion 9b is fitted and fixed to the base side of the intermediate portion 9c.
A shaft hole through which the first longitudinal axis 18 passes is formed in the rear portion 9b. The rear portion 9 b is disposed between the bifurcated bearing portions 24 of the first boom 8, and the first vertical axis 18 passes through the rear portion 9 b and the bearing portion 24. A shaft hole through which the second longitudinal axis 19 passes is formed in the front portion 9a. The front portion 9 a is disposed between the bifurcated bearing portions 41 at the base end portion of the third boom 10, and the second vertical axis 19 is passed through the front portion 9 a and the bearing portion 41.

As shown in FIG. 3, the pair of side plates (the right side plate 9R and the left side plate 9L) of the intermediate portion 9c are disposed on the inner side of the both side edges (the right side edge and the left side edge) of the upper plate 9U and the lower plate 9D. .
The second boom 9 is provided with a plurality of hose guides. The hose guide holds the hose along one side plate (the right side plate 9R) of the pair of side plates of the intermediate portion 9c.
There are two types of hose guides. The two types of hose guides are an upper hose guide 33 and a lower hose guide 34. As shown in FIG. 5 and the like, the upper hose guide 33 and the lower hose guide 34 are configured as separate members, and are arranged at different positions. The upper hose guide 33 holds a signal hose described later. The lower hose guide 34 holds a hydraulic hose.

First, the lower hose guide 34 will be described in more detail.
The lower hose guide 34 holds the first hydraulic hose 31a, the second hydraulic hose 31b, and the third hydraulic hose 31c. A plurality of lower hose guides 34 are provided at intervals in the front-rear direction of the second boom 9 (longitudinal direction extending from the first boom 8 side to the third boom 10 side).
The number of lower hose guides 34 can be set according to the length of the second boom 9, but is preferably at least three. In the present embodiment, three lower hose guides 34 are provided. Hereinafter, for the three lower hose guides 34 of the present embodiment, in order from the one on the proximal end side (first boom 8 side) of the second boom 9 toward the one on the distal end side (third boom 10 side), These may be referred to as a first lower hose guide 34a, a second lower hose guide 34b, and a third lower hose guide 34c, respectively.

  The lower hose guide 34 has a holding portion that holds the hydraulic hose. As shown in FIGS. 6 and 3, the holding portion is composed of a horizontal bar portion (horizontal bar portion 34 d) and vertical bar portions (first vertical bar portion 34 e and second vertical bar portion 34 f). . Specifically, the holding portion includes a first holding portion configured by a horizontal bar portion 34d and a second vertical bar portion 34f, and a horizontal bar portion 34d, a first vertical bar portion 34e, and a second vertical bar portion 34f. A second holding portion. The first holding unit holds the second hydraulic hose 31b and the third hydraulic hose 31c. The second holding unit holds the first hydraulic hose 31a. A specific method for holding the hydraulic hose by each holding portion will be described later. The horizontal bar portion 34d, the first vertical bar portion 34e, and the second vertical bar portion 34f are integrally formed of a metal round bar.

The horizontal bar portion 34d extends from one side plate (right side plate 9R) of the second boom 9 in the body width direction, one end abuts against the side plate (right side plate 9R), and the other end is the side plate. It is in a position away from (right side plate 9R).
The first vertical bar portion 34e extends upward (toward the upper plate 9U) from the extending end (other end portion) of the horizontal bar portion 34d. The first vertical bar portion 34e is disposed in parallel with one side plate (the right side plate 9R) of the second boom 9.

The second vertical bar portion 34f extends upward from one side edge (right side edge 9DR) of the lower plate 9D, and in the middle of the upper and lower sides, the middle portion of the horizontal bar portion 34d (substantially intermediate portion between one end and the other end) and Intersects at right angles. Hereinafter, with respect to the second vertical bar portion 34f, the lower part from the middle part of the horizontal bar part 34d is referred to as a lower part 34h, and the upper part is referred to as an upper part 34g.
The lower portion 34h extends upward from one side edge (right side edge 9DR) of the lower plate 9D in parallel with one side plate (right side plate 9R) of the second boom 9, and further upward and to the right side (a direction away from the right side plate 9R). ) To the middle part of the horizontal bar 34d.

The upper portion 34g extends from the middle portion of the horizontal bar portion 34d upward (toward the upper plate 9U) in parallel with the first vertical bar portion 34e. The extended end (upper end) of the upper portion 34g is at an upper position (position closer to the upper plate 9U) than the extended end (upper end) of the first vertical bar portion 34e.
As shown in FIGS. 3, 4, and 6, one side surface (left side surface) of the lower end portion of the lower portion 34h is welded to one side edge (right side edge 9DR) of the lower plate 9D.

The lower hose guide 34 is fixed to the second boom 9 by welding the lower portion 34h. On the other hand, one end portion (the end portion opposite to the extending end) of the horizontal bar portion 34d is in contact with one side plate (right plate 9R) of the second boom 9, but is not welded.
As a method of fixing the lower hose guide 34 to the second boom 9, a method of welding one end of the horizontal bar portion 34 d to one side plate (the right side plate 9 </ b> R) of the second boom 9 is also conceivable. However, this welding operation is difficult and there is a risk that the boom strength may be reduced due to the generation of strain stress. On the other hand, in this invention, since the method of welding the 2nd vertical bar part 34f with respect to one side edge (right side edge 9DR) of lower board 9D is adopted, while welding can be performed easily, Boom strength does not decrease due to the generation of strain stress.

  As shown in FIG. 4, a semicircular cutout 43 is formed on one side edge (right side edge 9DR) of the lower plate 9D. In the notch 43, one side portion (left side portion) of the second vertical bar portion 34f (lower portion 34h) is fitted. The left half of the outer peripheral surface of the second vertical bar portion 34 f is in contact with the inner surface of the notch 43. As a result, the contact area between the second vertical bar portion 34f and one side edge (right side edge 9DR) of the lower plate 9D is increased, and the welding strength is increased.

  As shown in FIGS. 3 and 5, the lower hose guide 34 is also a member that forms two guide portions (a first guide portion 35 and a second guide portion 36) that guide the hydraulic hose at different positions. The first guide part 35 is a part surrounded by the horizontal bar part 34d, the upper part 34g of the second vertical bar part 34f, and one side plate (right side plate 9R) of the second boom 9. The second guide part 36 is a part surrounded by the horizontal bar part 34d, the first vertical bar part 34e, and the second vertical bar part 34f. In other words, the first guide part 35 and the second guide part 36 are surrounded on the right side, the left side, and the lower side, but are opened on the upper side. For simplification of the figure, a hose cover 38 to be described later is indicated by a virtual line (two-dot chain line) in FIG. 3 and omitted in FIG.

  As shown in FIG. 3, a second hydraulic hose 31 b and a third hydraulic hose 31 c of the second hose group are arranged in the first guide portion 35. Specifically, in the first guide portion 35, the two second hydraulic hoses 31b are arranged vertically (in the vertical direction), and the two third hydraulic hoses 31c are arranged vertically. In other words, the first guide part 35 guides the four hydraulic hoses one by one up and down.

  Therefore, the second hydraulic hose 31b and the third hydraulic hose 31c arranged in the first guide part 35 are formed by the horizontal bar part 34d, the second vertical bar part 34f, and one side plate (right side plate 9R) of the second boom 9. Guided. In other words, the first guide portion 35 is formed by the first holding portion of the lower hose guide 34 and one side plate (the right side plate 9R) of the second boom 9, and the first guide portion 35 and the second hydraulic hose 31b and the second side hose 31b. 3 Hydraulic hose 31c is guided.

In the second guide portion 36, the first hydraulic hose 31a of the first hose group is disposed. Specifically, in the second guide portion 36, the two first hydraulic hoses 31a are arranged side by side in the vertical direction.
Accordingly, the first hydraulic hose 31a disposed in the second guide portion 36 is guided by the horizontal bar portion 34d, the first vertical bar portion 34e, and the second vertical bar portion 34f. In other words, the second guide portion 36 is formed by the second holding portion of the lower hose guide 34, and the first hydraulic hose 31 a is guided by the second guide portion 36.

As described above, the first to third hydraulic hoses 31a to 31c are held by the holding portions of the plurality of lower hose guides 34 provided on one side plate (right side plate 9R) of the second boom 9, and the second boom. 9 is disposed along one side plate (the right side plate 9R).
Specifically, the first hydraulic hose 31a extends from the distal end side of the side wall (right side wall 8R) of the first boom 8 toward the base end side of one side plate (right side plate 9R) of the second boom 9, The right side plate 8R extends along the side plate (right side plate 9R). The second hydraulic hose 31b and the third hydraulic hose 31c extend from one side (right side) of the rear part 9b of the second boom 9 through the opening 25, extend to the proximal end side of the right side plate 9R, Along one side plate (the right side plate 9R), it extends to the front end side of the right side plate 8R. That is, the first hydraulic hose 31a, the second hydraulic hose 31b, and the third hydraulic hose 31c are advanced from the base end side (first boom 8 side) along the one side plate (right side plate 9R) of the second boom 9. It extends toward the side (the third boom 10 side).

  Now, paying attention to the vertical positions of the plurality of lower hose guides 34 provided on the right side plate 9R, the vertical positions of the holding portions of the lower hose guides 34 arranged in the front and rear (longitudinal direction) of the second boom 9 are different from each other. . Specifically, the vertical position of the horizontal bar portion 34d constituting the holding portion of the first lower hose guide 34a and the horizontal bar portion 34d constituting the holding portion of the second lower hose guide 34b are different. Moreover, the vertical position of the horizontal bar part 34d which comprises the holding part of the 2nd lower hose guide 34b, and the horizontal bar part 34d which comprises the holding part of the 3rd lower hose guide 34c differ. That is, the holding portions of the plurality of lower hose guides 34 provided on the right side plate 9R are arranged in a staggered manner.

The arrangement of the lower hose guide 34 will be described in more detail with reference mainly to FIG. In FIG. 6, the first to fourth hydraulic hoses 31a to 31d and the hose cover 38 (described later) are omitted for the sake of simplicity.
As shown in FIG. 6, the vertical positions of the holding portions of the first lower hose guide 34a and the third lower hose guide 34c are at a first position separated from the upper plate 9U by the first distance d1. The vertical position of the holding portion of the second lower hose guide 34b is at a second position separated from the upper plate 9U by the second distance d2. The second distance d2 is set to be larger than the first distance d1. The difference (d2−d1) between the first distance d1 and the second distance d2 is set so that the hydraulic hose is loosened without excess or deficiency, and is set to about 20 to 30 mm as an example.

The arrangement of the plurality of lower hose guides 34 is not limited to the arrangement shown in FIG. For example, the first distance d1 may be set larger than the second distance d2, or the distances between the lower hose guides and the upper plate 9U may be all different.
When three or more lower hose guides 34 are arranged in the front and rear of the second boom 9, two or more lower hose guides 34 are arranged in two or more places. In this case, the vertical positions of the holding portions of the lower hose guides 34 arranged in the front-rear direction may be different at least at one or more locations. For example, as in this embodiment, when three lower hose guides (first lower hose guide 34a, second lower hose guide 34b, and third lower hose guide 34c) are arranged before and after the second boom 9, The vertical positions of the holding portions of the second lower hose guide 34b and the third lower hose guide 34c may be made the same by changing the vertical positions of the holding portions of the first lower hose guide 34a and the second lower hose guide 34b. Alternatively, the upper and lower positions of the holding portions of the first lower hose guide 34a and the second lower hose guide 34b may be the same, and the vertical positions of the holding portions of the second lower hose guide 34b and the third lower hose guide 34c may be different. .

By arranging the plurality of lower hose guides 34 as described above, if the hydraulic hoses are held by the holding portions of the plurality of lower hose guides 34 and arranged along the side plate (the right side plate 9R), the hydraulic hoses naturally overload. It will sag without lack.
Therefore, it is possible to reduce the time required for the adjustment work for appropriately slackening the hydraulic hose, and to arrange the hydraulic hose easily and in a short time.

  Since the first hydraulic hose 31a, the second hydraulic hose 31d, and the third hydraulic hose 31c have a structure in which a reinforcing material (metal wire) is wound around an outer peripheral surface of a rubber hose, the first hydraulic hose 31a, the second hydraulic hose 31d, and the third hydraulic hose 31c have high rigidity. ing. Therefore, these hydraulic hoses are arranged in a shape substantially along the arrangement of the plurality of lower hose guides 34 with little slack between the lower hose guides 34 arranged along the longitudinal direction of the second boom 9. It will be. That is, since the shape (sagging) of the hydraulic hose generally depends on the arrangement of the plurality of lower hose guides 34, the hydraulic hose can be naturally not excessive or deficient by setting the lower hose guide 34 as described above. It begins to sag.

  Moreover, since the upper direction of the 1st guide part 35 and the 2nd guide part 36 is open | released, a hydraulic hose can be put into the said guide part from upper direction, and can be hold | maintained at a holding | maintenance part. Therefore, using a hose guide that forms a guide section surrounded on all sides, the hydraulic hose can be arranged more easily than when a hydraulic hose is inserted through the guide section (see, for example, Patent Document 1 above). In addition, it can be performed in a short time.

  The first hydraulic hose 31a is connected to a reserve actuator that drives another work tool, and pulsates when a work tool that generates severe vibration when using a hydraulic breaker or the like is mounted as another work tool. Therefore, if the first hydraulic hose 31a is arranged in contact with another hydraulic hose, the first hydraulic hose 31a may pulsate and rub against the other hydraulic hose. In the present invention, the second hydraulic hose 31b and the third hydraulic hose 31c are arranged in the first guide part 35, and the first hydraulic hose 31a is arranged in the second guide part 36, whereby the first hydraulic hose 31a pulsates. However, it does not rub against the second hydraulic hose 31b and the third hydraulic hose 31c. Thereby, the wear of the second hydraulic hose 31b and the third hydraulic hose 31c due to the pulsation of the first hydraulic hose 31a is prevented, and the life of the hose can be extended.

  Further, the first hydraulic hose 31a is for feeding hydraulic oil for a reserve actuator that can be retrofitted, and may be retrofitted. Even in such a case, the first hydraulic hose 31a is located outside the guide portion (first guide portion 35) where the second hydraulic hose 31b and the third hydraulic hose 31c are arranged (on the side opposite to the right side plate 9R). Since it is arranged in the guide part (second guide part 36), retrofitting work is easy. That is, the first hydraulic hose 31a can be routed later without changing the route of the second hydraulic hose 31b and the third hydraulic hose 31c.

  The first hydraulic hose 31a is not routed along the first boom 8, and the first oil feed pipe 30a made of a rigid material is routed along the first boom 8. Therefore, even if the first hydraulic hose 31a pulsates, the first hydraulic hose 31a does not rub against other hydraulic hoses at the portion along the first boom 8, and the other is caused by the pulsation of the first hydraulic hose 31a. The hose will not wear out.

As shown in FIG. 5, the upper hose guide 33 holds the signal hose 37. The signal hose 37 is a hose with a built-in signal line for an arm crane attached to the tip of the arm 11. The signal hose 37 is disposed along the one side plate (the right side plate 9 </ b> R) of the second boom 9 by being held by the upper hose guide 33.
Although only one signal hose 37 is shown in FIG. 5, two or more signal hoses 37 may be provided. Although two upper hose guides 33 are provided in this embodiment, three or more upper hose guides 33 may be provided. The upper hose guide 33 is a member curved in a substantially J shape, and the upper end portion is welded to one side edge (right side edge) of the upper plate 9U. The lower curved portion of the upper hose guide 33 forms a holding portion for holding the signal hose 37. As shown in FIG. 5, the signal hose 37 is stretched across the holding portions of the plurality of upper hose guides 33.

In the present embodiment, the plurality of upper hose guides 33 are arranged so that the vertical positions of the holding portions are equal. That is, as shown in FIG. 6, the plurality of upper hose guides 33 are arranged such that the distances d4 between the holding portion that holds the signal hose 37 and the upper plate 9U are all equal. However, the arrangement of the plurality of upper hose guides 33 is not limited to the arrangement shown in FIG.
As shown in FIG. 6, the upper hose guide 33 and the lower hose guide 34 are preferably arranged alternately in the front and rear (longitudinal direction) of the second boom 9. By alternately arranging the upper hose guide 33 and the lower hose guide 34, the upper hose guide 33 is not located immediately above the guide portions (the first guide portion 35 and the second guide portion 36) of the lower hose guide 34. As described above, when the hydraulic hose is held by the lower hose guide 34, the hydraulic hose is inserted into the guide portion from above. Therefore, when the upper hose guide 33 is not positioned directly above the guide portion of the lower hose guide 34, the upper hose guide 33 is not hindered when the hydraulic hose is held by the lower hose guide 34 and arranged.

As shown in FIGS. 2 and 5, one side plate (the right side plate 9 </ b> R) of the second boom 9 is provided with a hose cover 38 and a boss 39 for attaching the hose cover 38.
The boss 39 protrudes outward from one side plate (right side plate 9R) of the second boom 9, and between the side plate (right side plate 9R) and a side plate portion 38S (described later) of the hose cover 38. Has been placed. The hose cover 38 is fixed to the boss 39 with screws 40. A specific configuration of the hose cover 38 will be described later.

  As shown in FIG. 5, the boss 39 has an upper boss portion 39a and a lower boss portion 39b. The upper boss portion 39a is disposed on the upper side of one side plate (the right side plate 9R) of the second boom 9. The lower boss portion 39b is disposed below the one side plate (right side plate 9R) of the second boom 9. That is, the upper boss portion 39a and the lower boss portion 39b are arranged with a space in the vertical direction of the second boom 9 (the direction connecting the upper plate 9U and the lower plate 9D).

The upper boss portion 39a and the lower boss portion 39b are respectively provided at one end side (base end side) and the other end side (tip end side) of the second boom 9 in the front and rear (longitudinal direction). That is, a pair of bosses composed of the upper boss portion 39 a and the lower boss portion 39 b are arranged at an interval before and after the second boom 9.
Between the upper boss portion 39a and the lower boss portion 39b, a passage portion 44 through which the first to third hydraulic hoses 31a to 31c pass is formed. As shown in FIG. 5, the lower hose guide 34 guides the first to third hydraulic hoses 31 a to 31 c to the passage portion 44.

  The hydraulic hose guide by the lower hose guide 34 is realized by appropriately setting the positional relationship between the lower hose guide 34 and the boss 39 (upper boss portion 39a and lower boss portion 39b). Specifically, the vertical position of the upper boss portion 39a is above the vertical position of the holding portion of the lower hose guide 34, and the vertical position of the lower boss portion 39b is the vertical position of the holding portion of the lower hose guide 34. Is below. Accordingly, when the first to third hydraulic hoses 31a to 31c are held by the holding portion of the lower hose guide 34 and arranged, the hydraulic hoses 31a to 31c pass between the upper boss portion 39a and the lower boss portion 39b. Guided through 44.

  The boss 39 has a retaining function for preventing the first to third hydraulic hoses 31 a to 31 c from being detached from the lower hose guide 34. Since the first guide part 35 and the second guide part 36 are opened upward, the first to third hydraulic hoses 31a to 31c arranged in the first guide part 35 and the second guide part 36 move upward. Can do. Therefore, there is a possibility that the hydraulic hoses 31a to 31c are moved upward and detached from the first guide part 35 and the second guide part 36 with the offset operation of the second boom 9 to the left and right. However, in the present invention, since the upward movement of the hydraulic hoses 31a to 31c is blocked by the upper boss portion 39a, the detachment can be prevented. That is, the boss 39 for attaching the hose cover 38 also has a function of preventing the hydraulic hose from coming off.

The hose cover 38 is formed by bending a metal flat plate, and includes a side plate portion 38S, an upper plate portion 38U, and a lower plate portion 38D. The side plate portion 38S, the upper plate portion 38U, and the lower plate portion 38D form a space through which the hydraulic hose is inserted between the one side plate (the right side plate 9R).
The side plate portion 38S is arranged in parallel with one side plate (right side plate 9R) of the second boom 9 and with a space between the side plate 38S. The side plate portion 38S is formed in a rectangular shape having substantially the same shape and size as one side plate (the right side plate 9R) of the second boom 9.

The upper plate portion 38U extends from the upper edge of the side plate portion 38S toward one side edge (right side edge) of the upper plate 9U of the second boom 9, and the extended end contacts the one side edge (right side edge). It touches. An upper boss portion 39a is disposed near the lower portion of the upper plate portion 38U.
The lower plate portion 38D extends from the lower edge of the side plate portion 38S toward one side edge (right side edge) of the lower plate 9D of the second boom 9, and the extended end contacts the one side edge (right side edge). It touches. A lower boss portion 39b is disposed near the upper portion of the lower plate portion 38D.

  An upper hose guide 33 and a lower hose guide 34 are arranged between one side plate (the right side plate 9R) of the second boom 9 and the side plate portion 38S of the hose cover 38. Thereby, the signal hose 37 and the first to third hydraulic hoses 31a to 31c are connected to one side plate (the right side plate 9R) of the second boom 9, the upper plate portion 38U, the side plate portion 38S, and the lower plate portion of the hose cover 38. It is arranged in a space surrounded by 38D. Therefore, the movements of the hoses 37 and 31a to 31c are allowed only in the space, and can be prevented from greatly swelling away from the one side plate (the right side plate 9R). In addition, when an impact is applied to one side (right side) of the second boom 9 from the outside, the impact can be received by the hose cover 38, so that the impact is not directly transmitted to each hose. it can. Moreover, since each hose is arrange | positioned inside the hose cover 38, a hose is not exposed to the outer surface side of the side plate part 38S of the hose cover 38. For this reason, a name plate indicating the model, company name, etc. can be attached to the outer surface of the side plate portion 38S of the hose cover 38.

The third boom 10 has a bracket 28 on one side plate (the right side plate 10R). The one side plate (right side plate 10R) is a side plate disposed on the same side as one side plate (right side wall 8R) of the first boom 8 and one side plate (right side plate 9R) of the second boom 9.
As shown in FIG. 2, the bracket 28 has a fixed plate 28a and a hose joint 28b. The fixed plate 28a is fixed to one side plate (the right side plate 10R) of the third boom 10. The hose joint 28b is attached to the fixed plate 28a. An extended end (the other end portion) of the first hydraulic hose 31a is connected to one end side (the second boom 9 side) of the hose joint 28b. The other end side (arm 11 side) of the hose joint 28b forms a so-called service port, and can be connected to a fifth hydraulic hose 31e that supplies hydraulic oil to the spare actuator.

  As mentioned above, although this invention was demonstrated, it should be thought that embodiment disclosed this time is an illustration and restrictive at no points. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

DESCRIPTION OF SYMBOLS 1 Turning work machine 8 1st boom 8R Right side wall 8L Left side wall 8U Upper wall 8D Lower wall 9 Second boom 9R Right side plate 9L Left side plate 10 Third boom 10R Right side plate 11 Arm 12 Bucket (working tool)
28 Bracket 30a 1st oil feed pipe 30b 2nd oil feed pipe 30c 3rd oil feed pipe 30d 4th oil feed pipe 31a 1st hydraulic hose 31b 2nd hydraulic hose 31c 3rd hydraulic hose 31d 4th hydraulic hose 34 Lower hose guide (Hose guide)
34d Horizontal bar part 34e First vertical bar part 34f Second vertical bar part

Claims (6)

The aircraft,
A first boom pivotally supported by the airframe so as to swing up and down;
A second boom pivotally supported by the first boom so as to be swingable in the body width direction;
A third boom pivotally supported by the second boom so as to be swingable in the body width direction;
A plurality of hydraulic hoses extending along the second boom;
A plurality of oil feeding pipes made of a rigid material,
The first boom has a pair of side walls disposed opposite to each other, an upper wall that connects upper portions of the pair of side walls, and a lower wall that connects lower portions of the pair of side walls,
The plurality of oil feeding pipes include a first pipe group that is a predetermined number of oil feeding pipes and a second pipe group that is another oil feeding pipe different from the first pipe group,
The first pipe group extends from the base end side of the first boom to the front-rear middle part along the upper wall, and bends toward the outside of the upper wall at the middle part. Extending along the one side wall,
The second pipe group extends from the proximal end side of the first boom toward the distal end side along the upper wall,
A turning work machine in which a base end portion of a first hose group which is a predetermined number of the hydraulic hoses is connected to the first pipe group. The first pipe group is connected to the first hose group at a distal end portion of the one side wall corresponding to a distal end portion of the first boom,
The said 2nd pipe group is connected to the 2nd hose group which is a hydraulic hose different from the said 1st hose group by the front-end | tip part of the said upper wall corresponding to the front-end | tip part of the said 1st boom. The turning work machine described.   The turning work machine according to claim 2, wherein a hose guide for separately holding the first hose group and the second hose group is provided on the second boom. The second boom has a pair of side plates disposed opposite to each other,
The hose guide includes a horizontal bar portion extending in the body width direction from one side plate of the second boom, a first vertical bar portion extending upward from an extended end of the horizontal bar portion, and the horizontal bar portion. A second vertical bar portion extending upward from the midway portion,
The first hose group is held by the horizontal bar part, the first vertical bar part, and the second vertical bar part, and the second hose group is held by the horizontal bar part and the second vertical bar part. The turning work machine according to claim 3. An arm provided at the tip of the third boom;
The first hose group is a hydraulic hose that supplies hydraulic oil to an actuator that drives another work tool mounted on the tip of the arm instead of the work tool, and the second hose group includes the arm The turning work machine according to any one of claims 2 to 4, wherein the turning work machine is a hydraulic hose that supplies hydraulic oil to an actuator that drives a work tool attached to a distal end portion of the working tool. A bracket is provided on the side plate of the third boom,
The turning work machine according to any one of claims 1 to 5, wherein a distal end portion of the first hose group is connected to the bracket.

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