JP3377198B2 - Swiveling construction machine - Google Patents

Description

Detailed Description of the Invention

TECHNICAL FIELD The present invention relates to a swing-type construction machine such as a hydraulic excavator for excavating earth and sand.

BACKGROUND ART Generally, hydraulic excavators and the like are known as a swing-type construction machine. The hydraulic excavator is generally composed of a lower traveling body and an upper revolving body rotatably mounted on the lower traveling body, and a working device is provided on the front portion of the upper revolving body so as to be able to move up and down. ing.

There are various types of hydraulic excavators suitable for excavation work in a narrow space. The upper revolving structure of this hydraulic excavator is formed in a substantially circular shape, and the working device is swung upward by raising. It is placed on the body. As a result, the hydraulic excavator can rotate the upper-part turning body in a state where the working device is within the turning radius.

The upper revolving structure used for this type of hydraulic excavator includes a revolving frame, a driver's seat arranged on the left side of the revolving frame, and a counterweight attached to the rear end of the revolving frame. Generally constituted by an engine mounted on the front side of the counterweight and mounted on the rear side of the revolving frame, and a control valve group disposed on the front side of the engine on the right side of the revolving frame. ing. Further, the upper swing body is provided with an exterior cover that covers the engine, the control valve group, and the like.

Here, the revolving frame includes a bottom plate formed in a substantially circular shape, left and right vertical plates standing on the bottom plate so as to extend in the front and rear directions, and in the vicinity of a connecting portion of the working device. The horizontal plate is positioned and extends in the left and right directions, and both ends thereof are generally constituted by horizontal plates fixed to the vertical plate. And
The horizontal plate serves as a reinforcing member for increasing the strength of each vertical plate against collapse.

On the other hand, the working device includes a boom attached to the left and right vertical plates of the revolving frame so as to be able to move up and down, an arm attached to the tip of the boom so as to be able to move up and down, and a rotating arm at the tip of the arm. It is generally constituted by a bucket that is movably attached. A boom cylinder is provided between each vertical plate and the boom, an arm cylinder is provided between the boom and the arm, and a bucket cylinder is provided between the arm and the bucket.

Further, on the back surface of the boom, hydraulic piping connected to the arm and the bucket is provided extending in the longitudinal direction,
The hydraulic pipe and the control valve group are connected via a hydraulic hose such as an arm hydraulic hose and a bucket hydraulic hose.

Of the above-described conventional upper revolving structure, the structure mainly relating to the frame will be specifically described with reference to FIG.

In the figure, the revolving frame 101 has left and right vertical plates 101B (only the right side is shown) erected on a bottom plate 101A, and is inclined downward toward the front between the left and right vertical plates 101B. A horizontal plate 101C is provided. Also on the left,
The boom 102 of the working device 102 is provided on the right vertical plate 101B.
The foot portion of A is attached so that it can be lifted and lowered. Also,
A partition plate 103 extending rearward is provided at the rear portion of the horizontal plate 101C, and the partition plate 103 constitutes an inclined surface together with the horizontal plate 101C. Further, on the rear side of the partition plate 103, an exterior cover 104 that covers an engine (not shown) and the like is provided.

Further, the bottom plate 101A of the revolving frame 101
On the right side of the vertical plate 1 near the mounting position of the boom 102A.
A control valve group 105 is provided on the outer right side of 01B. A hose insertion hole 101D is formed in the right vertical plate 101B in the vicinity of the control valve group 105 and on the lower surface side of the horizontal plate 101C. In addition, the partition plate 103
A hose take-out hole 103A is formed in the vicinity of the connecting portion of the boom 102A. And control valve group 1
Hydraulic hose 106 extending from 05 to the boom 102A
Is the hose insertion hole 101D of the vertical plate 101B and the partition plate 10.
It reaches the boom 102A through the hose extraction hole 103A of No. 3, and is connected to the hydraulic pipe provided in the boom 102A.

In the hydraulic excavator according to the prior art thus constructed, when excavating earth and sand in a narrow place, the boom 102A is lifted and the arm is lowered while the earth and sand are scooped by the bucket. By moving the work device 102 within the swing radius of the upper swing body, the upper swing body is swung in this state. As a result, for example, it is possible to load earth and sand on a transportation vehicle waiting on the side opposite to the excavation site.

In the conventional hydraulic excavator described above, since the plurality of hydraulic hoses 106 pass through the inside of the partition plate 103 on the lower surface side of the horizontal plate 101C constituting the revolving frame 101, the hydraulic hose 106. Is difficult to reach, and there is a problem that assembly work and replacement work become difficult.

The hydraulic hose 106 has a partition plate 103.
From the hose take-out hole 103A formed in the boom to the boom 102
Guided towards A. On the other hand, when excavating earth and sand using a hydraulic excavator, the earth and sand 107 in the bucket may spill out when the bucket is lifted upward to set the working device 102 in a turning posture.

Therefore, the earth and sand 107 spilling from the bucket and sliding down on the partition plate 103 is caught by the hydraulic hose 106 guided to the outside from the hose collecting hole 103A, and is dammed by the hydraulic hose 106, so that the partition plate 103 is blocked. There is a problem of depositing on top. Furthermore, there is a problem that the accumulated earth and sand and rainwater enter the upper revolving body through the hose extraction hole 103A and are accumulated on the bottom plate 101A.

DISCLOSURE OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the prior art, and an object of the present invention is to facilitate the handling of a hydraulic hose and improve the workability of assembly work, replacement work and the like. The present invention is to provide a swing-type construction machine that is capable of performing.

Another object of the present invention is to provide a swing-type construction machine capable of preventing soil and the like from accumulating around the hydraulic hose and from entering the upper swing body. Especially.

A revolving construction machine according to the present invention comprises an undercarriage, an upper revolving structure having an engine and a driver seat on a revolving frame rotatably mounted on the lower revolving structure, and the upper revolving structure. It comprises a working device provided on the front part of the revolving frame so as to be able to lift and lower.

In order to solve the above problems,
The feature of the configuration adopted by the invention of claim 1 is that the revolving frame of the upper revolving structure has a bottom plate, and a standing portion extending forwardly and backwardly on the bottom plate, and the connecting portion of the working device is attached to the front side. The left and right vertical plates and the left and right vertical plates are disposed so as to extend in the left and right directions in a state of being located in the vicinity of the connecting portion of the working device and inclined obliquely downward toward the front side. A horizontal plate fixed to the horizontal frame, and at least one of the left and right vertical plates of the swivel frame has a hose insertion hole through which a hydraulic hose extending toward the working device is inserted. It is provided at a position above the upper surface of the.

With this structure, the hose insertion hole is provided above the upper surface of the horizontal plate. Therefore, by removing the hydraulic hose from the hose insertion hole, the hydraulic hose can be grasped and handled by hand. Therefore, the hydraulic hose can be easily attached / detached to / from the hydraulic pipe provided in the working device. Further, the hose insertion hole is provided above the upper surface of the horizontal plate, but since the hose insertion hole is provided as a horizontal hole in the vertical plate, falling earth and sand etc. enter the upper revolving body through the hose insertion hole. Can be prevented. further,
Since a space can be provided between the hydraulic hose and the horizontal plate that is inclined obliquely downward toward the front side, it is possible to prevent soil and the like from accumulating around the hydraulic hose.

According to the second aspect of the invention, a sediment passage is formed on the upper surface side of the horizontal plate between the hydraulic hose inserted in the hose insertion hole, and the sediment passage faces the working device upward. The earth and sand that fall from above when being swung up are discharged along the inclination of the horizontal plate.

With this construction, the falling earth and sand flow through the earth and sand passage between the horizontal plate and the hydraulic hose which are inclined obliquely downward toward the front, so that the earth and sand come into contact with the hydraulic hose or accumulate. It is discharged without doing.

On the other hand, the feature of the structure adopted by the invention of claim 3 is that the revolving frame of the upper revolving structure is a bottom plate and a standing portion extending on the bottom plate so as to extend in the front and rear directions, and is connected to the front side of the working device. And the left and right vertical plates to which are attached, and which are located in the vicinity of the connecting portion of the working device and extend in the left and right directions in a state of being inclined obliquely downward toward the front side, and are arranged at intervals in the upper and lower directions. , The left and right ends are fixed to the left and right vertical plates respectively and upper and lower horizontal plates, and the hydraulic hose extending toward the working device is the upper side of the upper horizontal plate. It is configured to be connected to the hydraulic pipe provided in the working device through.

With this configuration, since the lower horizontal plate and the upper horizontal plate are provided between the left and right vertical plates,
The two horizontal plates can increase the strength of each vertical plate against falling. Further, since the hydraulic hose passes through the upper surface side of the upper horizontal plate, it is possible to provide a space where no hydraulic hose exists between the two horizontal plates inclined obliquely downward to the front side, and earth and sand pass through this space. It can be used as a earth and sand passage and can prevent sediment and the like from accumulating.

Further, according to the invention of claim 4, between the upper and lower horizontal plates, the earth and sand falling from above when the working device is lifted upward is discharged along the inclination of the horizontal plates. It is configured to form a earth and sand passage.

With this configuration, the falling earth and sand flow in the earth and sand passage between the upper horizontal plate and the lower horizontal plate that are inclined obliquely downward toward the front side. Emitted without contact or buildup.

According to the invention of claim 5, at least one of the left and right vertical plates of the revolving frame is provided with:
A hose insertion hole, which is located on the upper surface side of the upper horizontal plate and through which the hydraulic hose is inserted, is provided.

With this structure, since the hose insertion hole is provided on the upper surface side of the upper horizontal plate, the hydraulic hose can be grasped and handled by hand by taking out the hydraulic hose from the hose insertion hole. Therefore, the hydraulic hose can be easily attached / detached to / from the hydraulic pipe provided in the working device. Further, the hose insertion hole is provided on the upper surface side of the upper horizontal plate, but since the hose insertion hole is provided as a horizontal hole in the vertical plate, falling earth and sand etc. enter the upper revolving body through the hose insertion hole. Can be prevented.

Further, according to the invention of claim 6, the hydraulic hose is fixed to the upper horizontal plate between the left and right vertical plates.

With this structure, a plurality of hydraulic hoses extending toward the working device can be fixed so as to be bundled by using the upper horizontal plate.

On the other hand, in the invention of claim 7, on the front side of the revolving frame, a control valve group is provided on the bottom plate, which is located on the left and right sides of one of the vertical plates on the left and right sides. The one end side of the hydraulic hose is connected to the control valve group side.

With this configuration, the control valve group can be arranged in the vicinity of the working device attached to the front side of the left and right vertical plates, and the control valve group and the working device can be easily connected by the hydraulic hose. Can be connected to.

Further, according to the invention of claim 8, a hose cover for covering the hydraulic hose is provided between the left and right vertical plates of the revolving frame.

With this configuration, even if earth and sand fall toward the hydraulic hose, the earth and sand only collide with the hose cover, so that the hydraulic hose can be prevented from being damaged by the earth and sand. it can.

BEST MODE FOR CARRYING OUT THE INVENTION A hydraulic excavator will be described below as an example of a swing-type construction machine according to an embodiment of the present invention in detail with reference to FIGS. 1 to 8.

Reference numeral 1 is a lower traveling body of the hydraulic excavator, 2 is an upper revolving body mounted on the lower traveling body 1 through a revolving device 3 so as to be rotatable, and an earth discharging device is provided in front of the lower traveling body 1. 4 is attached so as to be rotatable in the upward and downward directions. Also,
On the front side of the upper swing body 2, a working device 5 described later is provided so as to be able to move up and down.

Reference numeral 5 denotes a working device provided on the front side of the upper revolving structure 2 so as to be able to move up and down.
A lower boom 6 which is attached so as to be able to move upward and downward via an upper boom 7, an upper boom 7 which is attached to the tip of the lower boom 6 so as to be swingable in the left and right directions, and a left and right swing which is attached to the tip of the upper boom 7. Movable arm retainer 8
And an arm 9 that is attached to the arm retainer 8 so as to be able to move up and down, and a bucket 10 that is rotatably attached to the tip of the arm 9.

A link rod 11 is rotatably connected between the tip of the lower boom 6 and the arm retainer 8, and the ring rod 11 forms a parallel link with the lower boom 6, the upper boom 7, and the arm retainer 8. The parallel link keeps the arm 9 (arm retainer 8) parallel to the lower boom 6 at all times.

Furthermore, the swing frame 17 and the lower boom 6
A boom cylinder 12 is provided between the arm retainer 8 and the arm retainer 8, and an arm cylinder 13 is provided between the arm retainer 8 and the arm 9, and a bucket cylinder 14 is provided between the arm 9 and the bucket 10. An offset cylinder 15 is provided between the lower boom 6 and the upper boom 7.

Here, as shown in FIG. 4, pressure oil is directed toward the arm cylinder 13, the bucket cylinder 14, and the offset cylinder 15 on the rear surface of the lower boom 6 located on the rear side in a state where the lower boom 6 is lifted. A plurality of hydraulic pipes 16 (only one is shown) for supplying and discharging are attached. An offset hydraulic hose 37E, a bucket hydraulic hose 37F, and an arm hydraulic hose 37G, which will be described later, are connected to each hydraulic pipe 16.

On the other hand, the upper swing body 2 includes a swing frame 17, a driver's seat 28, an engine 30, a control valve group 35, which will be described later.
The exterior cover 42 and the like are included.

Reference numeral 17 denotes a turning frame, which is the turning frame 1
As shown in FIG. 3, reference numeral 7 denotes a bottom plate 18 formed as a substantially circular flat plate, a left vertical plate 19 extending from a substantially central portion of the bottom plate 18 to the front side and standingly provided on the bottom plate 18, and a left vertical plate. Board 19
Is generally constituted by a right vertical plate 20 which is arranged on the right side of the base plate with a gap and extends in the front and rear directions and which is erected on the bottom plate 18, and a rear left vertical plate 21 which is located at a rear end portion of the left vertical plate 19. ing. The swing frame 17 is provided with a floor plate 22 (illustrated in FIG. 1) located on the left side (outside) of the left vertical plate 19 so as to cover above the bottom plate 18, and above the floor plate 22 will be described later. A driver's seat 28, an operating lever device 29, and the like are provided. The rear left vertical plate 21 includes a vertical plate portion 21A extending parallel to the right vertical plate 20 and a connecting plate portion 21B connecting the left vertical plate 19 and the right vertical plate 20 at a front side position of the vertical plate portion 21A. It consists of

Reference numeral 23 is a lower horizontal plate located near the connecting portion 6A of the lower boom 6 and provided between the left vertical plate 19 and the right vertical plate 20, and the lower horizontal plate 23 is left, Right vertical plate 19,
It is formed of a thick strength member in order to prevent the falling of 20. Here, as shown in FIGS. 4 and 6, the lower lateral plate 23 is an inclined plate portion 23 that is gradually inclined downward toward the front side.
A and the bottom plate 1 extending downward from the tip of the inclined plate portion 23A.
8 and a vertical plate portion 23B which is in contact with The lower horizontal plate 23 includes vertical plates 19 and 20 on the left and right ends of the inclined plate portion 23A and the vertical plate portion 23B in the left and right directions.
To the bottom plate 18 by welding or the like. The lower end of the vertical plate portion 23B is fixed to the bottom plate 18 by welding or the like.

Reference numeral 24 is an upper horizontal plate located above the lower horizontal plate 23 and provided between the left vertical plate 19 and the right vertical plate 20, and the upper horizontal plate 24 is connected to the lower horizontal plate 23. Similarly, the left and right vertical plates 19 and 20 are formed as thick-walled strength members to prevent the vertical plates 19 and 20 from collapsing, and are inclined obliquely downward toward the front side to form the inclined plate portion 23A of the lower horizontal plate 23. Are arranged substantially in parallel with a space between them. And the upper lateral plate 24
The left and right ends thereof are fixed to the left and right vertical plates 19 and 20 by welding or the like.

Reference numeral 25 denotes a sediment passage formed between the inclined surface portion 23A of the lower horizontal plate 23 and the upper transverse plate 24. The sediment passage 25 becomes a space in which a hydraulic hose 37 described later does not exist, and the sediment passage is formed. 25 is a passage through which earth and sand 50, which will be described later, rolls down along the inclined plate portion 23A of the lower horizontal plate 23 that is inclined obliquely downward toward the front side.

Reference numeral 26 denotes a hose insertion hole provided in the right vertical plate 20. The hose insertion hole 26 is located near the front side of the upper horizontal plate 24, that is, on the upper surface side of the upper horizontal plate 24, that is, the upper horizontal plate 24.
It is arranged above. And the hose insertion hole 2
Reference numeral 6 denotes an offset hydraulic hose 37E, which will be described later, which supplies and discharges pressure oil to the working device 5 side, a bucket hydraulic hose 37F,
The arm hydraulic hose 37G is taken out.

27 is a canopy provided on the left side of the upper revolving structure 2 (see FIGS. 1 and 2).
.. and a canopy roof 27B mounted on each of the support columns 27A. The support columns 27A, 27A ,. The canopy 27 has the front side attached to the bottom plate 18,
The rear side is attached to the support frame 41.

Reference numeral 28 denotes a driver's seat located inside the canopy 27 and provided on the floor plate 22 of the revolving frame 17 via a pedestal 28A. An operating lever device 29 is provided in front of the driver's seat 28.
Is provided. Here, the operation lever device 29 includes a lever stand 29A that is erected on the floor plate 22, a traveling operation lever 29B and a work operation lever 29C that are provided on the upper end side of the lever stand 29A, and the lever stand 2
It is generally constituted by a pressure reducing valve type pilot valve (not shown) located in 9A and operated by the work operation lever 29C.

The reference numeral 30 designates an engine mounted horizontally on the rear side of the revolving frame 17 and extending leftward and rightward (see FIG. 2).
A heat exchanger 31 such as a radiator and an oil cooler is arranged on the right side of the engine 30 (indicated by a dotted line therein), and a hydraulic pump 32 is mounted on the left side of the engine 30.

Reference numeral 33 is a counterweight attached to the rear side of the revolving frame 17, and the counterweight 3
3 is formed in an arc shape corresponding to the turning radius of the upper turning body 2.

Reference numeral 34 is a hydraulic oil tank disposed on the right side of the revolving frame 17 and in front of the engine 30 (shown in FIGS. 2 and 5). The hydraulic oil tank 34 is a hydraulic cylinder,
It stores hydraulic oil for driving a hydraulic motor and the like.

Reference numeral 35 denotes a control valve group located on the front side of the hydraulic oil tank 34 and arranged on the right side (outside) of the right vertical plate 20 of the revolving frame 17, and the control valve group 35 is as shown in FIG. It is mounted on the bottom plate 18 via the valve support member 36.
Further, the control valve group 35 is composed of a plurality of directional control valves that are arranged so as to overlap in the upper and lower directions, and these directional control valves are arranged in order from the lower side to the earth discharging directional control valve 35A, the left and the right. Traveling directional control valves 35B, 35C, standby directional control valve 35
D, an offset direction control valve 35E, a bucket direction control valve 35F, an arm direction control valve 35G, a boom direction control valve 35H, and a turning direction control valve 35J.

Of the directional control valves 35A to 35J, mechanically operated directional control valves are used as the directional control valves 35A to 35C, and the directional control valves 35A to 35C are connected to the operating lever device 29 by a cable ( (Not shown). Hydraulic pilot type directional control valves are used as the other directional control valves 35D to 35J, and each of the directional control valves 35D to 35J is connected to a pilot valve of the operating lever device 29 via a pilot hose (not shown). ing.

Here, among the directional control valves 35A to 35J, the arm directional control valve 35G, the bucket directional control valve 35F, and the offset directional control valve 35G for controlling the arm cylinder 13, the bucket cylinder 14, and the offset cylinder 15 of the working device 5. The direction control valve 35E is arranged at a position substantially the same as the hose insertion hole 26 of the right vertical plate 20. As a result, the directional control valves 35G, 35F, 35E and the cylinder 1
3, 14 and 15 are connected to an arm hydraulic hose 37 described later.
G, a bucket hydraulic hose 37F, and an offset hydraulic hose 37E when connecting using these hydraulic hoses 37
G, 37F, 37E are directional control valves 35G, 35F, 3
The hydraulic hoses 37E, 37F and 37G can be easily carried around from 5E to the hose insertion hole 26 almost straightly.

37 is a hydraulic hose connected to the control valve group 35. The hydraulic hose 37 is a hydraulic hose 37A for soil discharge,
The traveling hydraulic hoses 37B and 37C, the offset hydraulic hose 37E, the bucket hydraulic hose 37F, the arm hydraulic hose 37G, the turning hydraulic hose 37J and the like are provided.

Therefore, the earth discharging hydraulic hose 37A is connected to the earth discharging direction control valve 35A, and the earth discharging hydraulic hose 3 is connected.
7A is connected to the soil discharging device 4 via a center joint (not shown). Further, traveling hydraulic hoses 37B and 37C are connected to the left and right traveling direction control valves 35B and 35C, and the traveling hydraulic hoses 37B and 37C are provided on the lower traveling body 1 via a center joint. , Connected to the right travel motor (not shown).

The offset directional control valve 35E is connected to an offset hydraulic hose 37E, the bucket directional control valve 35F is connected to a bucket hydraulic hose 37F, and the arm directional control valve 35G is connected to an arm hydraulic pressure. The hose 37G is connected. Then, the offset hydraulic hose 37E, the bucket hydraulic hose 37F, and the arm hydraulic hose 37G are taken out onto the upper horizontal plate 24 through the hose insertion hole 26 provided in the right vertical plate 20, and the connecting portion of the lower boom 6 is connected. It is connected to the hydraulic pipe 16 through the lower side of 6A. Also, these hydraulic hoses 37E, 37
F and 37G are hose brackets 38 on the upper horizontal plate 24.
It is fixed in alignment by.

On the other hand, a boom hydraulic pipe 37H is connected to the boom directional control valve 35H, and the boom hydraulic pipe 3H is connected to the boom hydraulic pipe 37H.
7H is connected to the boom cylinder 12 via a boom hydraulic hose (not shown). Further, a turning hydraulic hose 37J is connected to the turning direction control valve 35J, and the turning hydraulic hose 37J is connected to a turning motor (not shown) that is a drive source of the turning device 3.

39 and 40 are skirt covers provided around the revolving frame 17, and the skirt covers 39 and 4 are provided.
As shown in FIG. 2, 0 is provided to cover the periphery of the revolving frame 17 so as to be continuous with the counterweight 33.

Reference numeral 41 is a support frame (shown in FIGS. 4 and 6) for supporting the canopy 27.
It is provided on the rear side of the revolving frame 17 so as to straddle the engine 30. Here, the support frame 41 is composed of a plurality of legs 41 which are spaced apart in the front and rear directions and in the left and right directions.
A and 41A (only two are shown), and a support pedestal 41B provided on each leg 41A so as to extend in the left and right directions.

Reference numeral 42 denotes an exterior cover located on the revolving frame 17 and extending from the right side to the rear side of the revolving frame 17, and the exterior cover 42 is disposed from the upper side of the engine 30 as shown in FIG. Revolving frame 17 to cover the front side
The engine front cover 43 which is erected on the upper side, the hydraulic oil tank 34 and the control valve group 35 which are located on the right side of the revolving frame 17.
And the right cover 44 for covering the hydraulic pump 3 located on the left side.
2 and the like, and a hood 46 that is located above the counterweight 33 and covers the rear side of the engine 30.
It is composed of and.

Reference numeral 47 designates the engine front cover 43 and the lower lateral plate 2.
3 is a partition plate provided between the partition plate 47 and FIG.
, The lower plate 47A and the upper plate 47B are
It is formed in a substantially rectangular shape by connecting downward. Further, the partition plate 47 has an upper end side which is the engine front cover 4
3, the lower end side is screwed to the upper end side of the lower side horizontal plate 23, and is gradually inclined downward as a whole toward the front side. The partition plate 47 is used as the engine front cover 4
3 and the lower lateral plate 23 are closed to prevent dirt and the like from entering the upper swing body 2.

A protective cover 48 is provided on the front side of the lower horizontal plate 23, and the upper end of the protective cover 48 is screwed to the inclined plate portion 23A of the lower horizontal plate 23. The protective cover 48 covers a pilot hose (none of which is shown) that connects the pilot valve provided in the operation lever device 29 and the control valve group 35.

Here, the inclined plate portion 23A of the lower horizontal plate 23,
The partition plate 47 and the protective cover 48 form one inclined surface that inclines downward toward the front side. Then, this slope is for discharging the falling earth and sand and the like through the earth and sand passage 25 to the front side.

Reference numeral 49 is a hose cover provided between the left and right vertical plates 19 and 20, and the hose cover 49 is bolted to the left and right vertical plates 19 and 20. The hose cover 49 is located at a portion where the offset hydraulic hose 37E, the bucket hydraulic hose 37F, and the arm hydraulic hose 37G are exposed upward, that is, between the front end of the hose insertion hole 26 and the connecting portion 6A of the lower boom 6. These hydraulic hoses 37E, 37F, 37G are covered.

The hydraulic excavator according to the present embodiment has the above-mentioned structure, and its operation will be described below.

First, the operator sits in the driver's seat 28,
The lower traveling body 1 is caused to travel by tilting the traveling operation lever 29B of the operation lever device 29 forward and backward. At this time, by tilting the other operating lever (not shown) to rotate the soil discharging device 4 in the upward and downward directions, the soil discharging device 4 can perform soil discharging work and the like.

Further, the operator operates the work operation lever 29C.
By operating the front and rear and left and right as appropriate,
The upper revolving structure 2 can be revolved on the lower traveling structure 1 or the working device 5 can be lowered to perform excavation work of earth and sand.

Here, a case where the hydraulic excavator according to the present embodiment is operated in a narrow work site will be described. In this case, after excavating the earth and sand with the bucket 10,
As shown in FIG. 1 and FIG. 4, the lower boom 6 is lifted and the arm 9 is lowered, so that the working device 5 is housed within the swing radius of the upper swing body 2. Then, in this posture, the upper swing body 2
By turning the vehicle, for example, the excavated earth and sand can be loaded on the transportation vehicle waiting on the side opposite to the excavation site.

During such a work, when the upper-part turning body 2 is turning, a part of the earth and sand in the bucket 10 is spilled, and the spilled earth and sand 50, 50 ,. It falls on the revolving structure 2.

At this time, the lower lateral plate 23 forming the slope
The inclined plate portion 23A, the partition plate 47, and the protective cover 48 can discharge the falling earth and sand 50 to the front side through the earth and sand passage 25 formed as a space where no hydraulic hose exists between the upper lateral plate 24 and the inclined plate portion 23A. It is possible to prevent the accumulation of sediment.

As described above, according to the present embodiment, the hose insertion hole 26 is located on the right vertical plate 20 of the revolving frame 17 and is located on the upper surface side of the upper horizontal plate 24, that is, above the upper horizontal plate 24. Since the hose insertion hole 26 is provided, the offset hydraulic hose 37E and the bucket hydraulic hose 3 are provided.
By taking out 7F and hydraulic hose 37G for arm,
An operator can easily grip and handle these hydraulic hoses 37E, 37F, 37G from the outside. As a result, the hydraulic hoses 37E, 37F, 37G can be easily attached to and detached from the hydraulic pipe 16 provided in the working device 5, and the workability in assembly work, replacement work, etc. can be improved.

The hose insertion hole 26 is formed in the upper lateral plate 24.
Although the hose insertion hole 26 is provided as a lateral hole in the right vertical plate 20, it is provided on the upper surface side of the
It is possible to prevent rainwater and the like from entering the upper revolving structure 2 through the hose insertion hole 26, and it is possible to keep the inside of the upper revolving structure 2 clean.

Further, since the lower horizontal plate 23 and the upper horizontal plate 24 are provided between the left and right vertical plates 19 and 20, the vertical plates 19 and 20 are formed by these two horizontal plates 23 and 24. It is possible to increase the strength against falling.

Moreover, a sediment passage 25 can be provided between the lower lateral plate 23 and the upper lateral plate 24, and the sediment passage 25 is directed forward by the inclined plate portion 23A of the lower lateral plate 23. It is formed as a space where there is no hydraulic hose and is inclined diagonally downward. Therefore, the earth and sand 50 falling from the packet 10 and the like can be discharged to the front side in the order of the partition plate 47, the earth and sand passage 25, and the protective cover 48.
It is possible to prevent the accumulation of 0. Also, the horizontal plates 23, 2
Since 4 is formed as a strength member, the earth and sand passage 25
Even if sediment is deposited on the ground, it can be forcibly removed by poking it with a bar.

Further, since the control valve group 35 is arranged on the right side of the right vertical plate 20, the control valve group 35 can be arranged in the vicinity of the working device 5. Thereby, the control valve group 35 and the working device 5 can be easily connected by the hydraulic hose 37, and the workability can be improved.

Further, since the offset hydraulic hose 37E, the bucket hydraulic hose 37F, and the hose cover 49 for covering the arm hydraulic hose 37G are provided between the vertical plates 19 and 20, the earth and sand 50 that has fallen is prevented by these hydraulic pressures. Hose 3
The hydraulic hoses 37E, 37F, 3 can be prevented from colliding with or accumulating on the 7E, 37F, 37G.
It is possible to prevent damage to 7G.

Further, since the hose bracket 38 is provided on the upper horizontal plate 24, the hydraulic hose 37E, 37F,
37G can be locked in alignment.

In the embodiment, the upper horizontal plate 24 is provided on the upper side of the lower horizontal plate 23 at intervals.
The case where the hose insertion hole 26 is provided in the right vertical plate 20 located on the upper surface side of the above has been described as an example. However, the present invention is not limited to this, and, for example, as in a modified example shown in FIG. 8, the revolving frame 61 is provided with the bottom plate 18, the left vertical plate 19, the right vertical plate 20, the rear left vertical plate 21, the floor plate 22, the lower side. The horizontal plate 23 may be used, and the upper horizontal plate 24 may be omitted.
In this case, the hose insertion hole 26 may be provided in the right vertical plate 20 above the lower horizontal plate 23 with a space.
As a result, a space between the hydraulic hoses 37E, 37F, 37G inserted into the hose insertion hole 26 and the upper surface of the lower horizontal plate 23 is formed by the lower horizontal plate 23 as an earth and sand passage 25 that is inclined downward toward the front. Can be secured.

In the embodiment, the case where the hose insertion hole 26 is provided in the right vertical plate 20 has been described as an example, but the present invention is not limited to this, and the control valve group 35 is provided in the left vertical plate. 1
When it is arranged on the left side of 9, the left vertical plate 19 may be provided with a hose insertion hole.

Further, in the embodiment, a small hydraulic excavator has been described as an example of the swing type construction machine, but the present invention is not limited to this, and for example, a medium or large hydraulic excavator, a wheel type hydraulic excavator, or the like. It can also be applied to other swing-type construction machines.

INDUSTRIAL APPLICABILITY As described in detail above, according to the invention of claim 1, the revolving frame of the upper revolving structure is provided with a bottom plate and an upright position extending on the bottom plate in the front and rear directions. The left and right vertical plates to which the connecting portion of the working device is attached to the front side, and the left and right vertical plates that are located in the vicinity of the connecting portion of the working device and extend in the left and right directions in a state where the working device is inclined obliquely downward toward the front side. Both ends are constituted by horizontal plates fixed to the left and right vertical plates respectively, and at least one vertical plate of the left and right vertical plates of the revolving frame is provided above the upper surface of the horizontal plate. Since the hose insertion hole for inserting the hydraulic hose that is positioned and extends toward the working device is provided, the hydraulic hose can be grasped and handled by hand by removing the hydraulic hose from the hose insertion hole. To the hydraulic piping installed in the working device. And it can be easily attached and detached, it is possible to improve the workability.

Further, although the hose insertion hole is provided above the upper surface of the horizontal plate, the hose insertion hole is provided as a horizontal hole in the vertical plate. The inside of the upper swing body can be kept clean. Further, since a space can be provided between the horizontal plate inclined obliquely downward toward the front side and the hydraulic hose, it is possible to prevent the accumulation of earth and sand around the hydraulic hose.

According to the second aspect of the present invention, the earth and sand passage is formed on the upper surface side of the horizontal plate between the hydraulic hose inserted through the hose insertion hole, and the earth and sand passage is the working device. Since it is configured to discharge the earth and sand falling from above when tilting upwards, the earth and sand falling from above when the working device is tilted upwards, It can flow along the earth and sand passage between the horizontal plate inclined obliquely downward to the front side and the hydraulic hose, and can be discharged without contacting the hydraulic hose or accumulating.

On the other hand, according to the third aspect of the present invention, the revolving frame of the upper revolving structure is provided with a bottom plate and a standing portion extending forward and rearward on the bottom plate, and a connecting portion of the working device is attached to the front side. The left and right vertical plates, which are located in the vicinity of the connecting portion of the working device, extend in the left and right directions in a state of being inclined obliquely downward toward the front side, and are arranged at intervals in the upper and lower directions.
Both ends in the right direction are constituted by upper and lower horizontal plates fixed to the left and right vertical plates respectively, and a hydraulic hose extending toward the working device is provided in the working device through the upper surface side of the upper horizontal plate. Since it is connected to the hydraulic pipe, it is possible to increase the strength of each vertical plate against collapse by the two horizontal plates. Further, since the hydraulic hose passes through the upper side of the upper horizontal plate, a space without a hydraulic hose can be provided between the two horizontal plates inclined obliquely downward to the front side. It can be used as a passage and can prevent sediments and the like from accumulating.

According to the invention described in claim 4,
Between the upper and lower horizontal plates, it is possible to form a earth and sand passage for discharging the earth and sand falling from above when the working device is lifted upwards along the slope of the horizontal plate. The earth and sand that are falling from above when you lift up,
The earth and sand passage between the upper horizontal plate and the lower horizontal plate inclined obliquely downward toward the front can be made to flow and can be discharged without contacting the hydraulic hose or accumulating.

According to the fifth aspect of the present invention, at least one of the left and right vertical plates of the revolving frame has the hydraulic hose inserted on the upper side of the upper horizontal plate. Since a hose insertion hole is provided, the hydraulic hose can be grasped and handled by hand by taking it out from the hose insertion hole, and the hydraulic hose can be easily handled with respect to the hydraulic piping provided on the working device. It can be attached and detached, and workability can be improved. Further, the hose insertion hole is provided on the upper surface side of the upper horizontal plate, but since the hose insertion hole is provided as a horizontal hole in the vertical plate, falling earth and sand etc. enter the upper revolving body through the hose insertion hole. Can be prevented, and the inside of the upper swing body can be kept clean.

According to the sixth aspect of the invention, since the hydraulic hose is fixed to the upper horizontal plate between the left and right vertical plates, a plurality of hydraulic hoses extending toward the working device are provided. Can be fixed so as to be bundled by using the upper lateral plate, and the hydraulic hoses can be aligned.

Further, according to the invention described in claim 7, the control valve is provided on the bottom plate on the front side of the revolving frame, which is located on the left side and the right side outside one of the vertical plates. Set up a group,
Since one end of the hydraulic hose is connected to the control valve group side, the control valve group can be arranged in the vicinity of the working device attached to the front side of the left and right vertical plates. Accordingly, the control valve group and the working device can be easily connected by the hydraulic hose, and the workability can be improved.

Further, according to the invention described in claim 8,
Since a hose cover that covers the hydraulic hose is provided between the left and right vertical plates of the swivel frame, even if earth and sand fall toward the hydraulic hose, this earth and sand only collide with the hose cover. It is possible to prevent the hydraulic hose from being damaged by the earth and sand, and it is possible to extend the life of the hydraulic hose. [Brief description of drawings]

FIG. 1 is a front view showing a hydraulic excavator applied to an embodiment of the present invention.

FIG. 2 is a plan view showing an upper swing body.

FIG. 3 is a plan view showing a swivel frame.

FIG. 4 is an enlarged cross-sectional view of a part of the upper-part turning body and a part of the working device as viewed in the direction of arrows IV-IV in FIG.

FIG. 5 is an enlarged cross-sectional view of a main part of the control valve group and the hydraulic hose with the exterior cover removed, as viewed from the direction of the arrow VV in FIG.

FIG. 6 is an enlarged cross-sectional view of a main part of FIG. 4, showing a discharged state of the falling earth and sand.

FIG. 7 is an enlarged perspective view of an essential part showing a swivel frame, each horizontal plate, a hydraulic hose, a hose cover and the like in an enlarged manner.

FIG. 8 is an enlarged cross-sectional view of an essential part showing a modified example of the invention from the same position as in FIG.

FIG. 9 is an enlarged cross-sectional view of a main part showing a main part of an upper swing body and a working device according to a conventional technique.

[Explanation of symbols]

1 Lower Traveling Body 2 Upper Revolving Body 5 Working Device 6 Lower Boom 6A Connecting Part 7 Upper Boom 16 Hydraulic Piping 17,61 Revolving Frame 18 Bottom Plate 19 Left Vertical Plate 20 Right Vertical Plate 23 Lower Horizontal Plate 24 Upper Horizontal Plate 25 Sediment Passage 26 Hose Insertion hole 28 Driver's seat 30 Engine 35 Control valve group 37A, 37B, 37C, 37E, 37F, 37G, 3
7J Hydraulic hose 38 Hose bracket 49 Hose cover

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Teruo Irino 3-171 Iwane Chuo, Kosai-cho, Koga-gun, Shiga (56) Reference JP-A-11-229433 (JP, A) JP-A-9-189049 (JP, A) Actual Kaihei 4-41541 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB name) E02F 9/00 E02F 3/36

Claims (8)

(57) [Claims] 1. An undercarriage, an upper revolving structure which is rotatably mounted on the lower revolving structure and has an engine and a driver's seat on a revolving frame, and a front part of the revolving frame of the upper revolving structure. In a swing-type construction machine comprising a movable work device, the swing frame of the upper swing body is a bottom plate, and is vertically installed on the bottom plate so as to extend in the front and rear directions, and is connected to the front side of the work device. Left and right vertical plates to which parts are attached, and extending in the left and right directions in a state of being inclined near the connecting part of the working device and inclined obliquely downward toward the front side, and the both ends are the left and right. A horizontal plate fixed to each vertical plate of the swivel frame, and at least one of the left and right vertical plates of the swivel frame has a hose insertion through which a hydraulic hose extending toward the working device is inserted. Position where the hole is above the upper surface of the horizontal plate Pivoting construction machine, characterized in that provided. 2. The earth and sand passage is formed on the upper surface side of the horizontal plate between the hydraulic hose inserted through the hose insertion hole, and the earth and sand passage is formed when the working device is lifted upward. The swivel construction machine according to claim 1, wherein the earth and sand falling from above is discharged along the inclination of the horizontal plate. 3. An undercarriage, an upper revolving structure which is rotatably mounted on the lower revolving structure and has an engine and a driver's seat on a revolving frame, and a front part of the revolving frame of the upper revolving structure. In a swing-type construction machine comprising a movable work device, the swing frame of the upper swing body is a bottom plate, and is vertically installed on the bottom plate so as to extend in the front and rear directions, and is connected to the front side of the work device. The left and right vertical plates to which the parts are attached, and the left and right vertical plates, which are located in the vicinity of the connecting portion of the working device and extend obliquely downward toward the front, extend left and right, and are arranged at intervals in the upper and lower directions. The left and right ends are fixed to the left and right vertical plates, respectively, and upper and lower horizontal plates are provided. The hydraulic hose extending toward the working device is an upper surface of the upper horizontal plate. Connected to the hydraulic pipe installed in the working device through the side Turning construction machine, wherein the configuration and the fact that. 4. A sand passage is formed between the upper and lower horizontal plates to discharge the earth and sand falling from above when the working device is lifted upward along the slope of the horizontal plate. The swing-type construction machine according to claim 3, wherein 5. A hose insertion hole, which is located on the upper surface side of the upper horizontal plate and through which the hydraulic hose is inserted, is provided in at least one of the left and right vertical plates of the revolving frame. The swivel type construction machine according to claim 3 or 4. 6. The hydraulic hose is configured to be fixed to the upper horizontal plate between the left and right vertical plates.
The turning construction machine according to 4 or 5. 7. A control valve group is provided on the bottom plate on the front side of the revolving frame, the control valve group being located outside of one of the vertical plates in the left and right directions with respect to one of the vertical plates. The swivel construction machine according to claim 1, 2, 3, 4, 5 or 6, wherein one end side of the hydraulic hose is connected to the group side. 8. The swivel type according to claim 1, wherein a hose cover for covering the hydraulic hose is provided between the left and right vertical plates of the swivel frame. Construction machinery.