JPH10280474A - Construction machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To protect a hose for each supply and discharge piping against damages by preventing the hose from being collapsed or excessively bent. SOLUTION: A band plate 30 having a spring function is laid along a hydraulic hose 20, and formed to be fastened between each hose clamp 22 for binding the hydraulic hose 20. As a result, the band plate 30 prevents the hydraulic hose 20 from being collapsed right and left. Also, when the hydraulic hose 20 is bent like a circular arc in such a state as projected backward during the operation of a work device at an elevation angle, the band plate 30 prevents the hydraulic hose 20 from drooping due to the dead load thereof, and preventing the excessive bend thereof as well.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a construction machine in which a working device is provided on a main body of a working machine so as to be able to move up and down.
The present invention relates to a construction machine having a supply / discharge pipe in which a portion between a work machine main body and a work device is a hose.

[0002]

2. Description of the Related Art In general, a hydraulic excavator as a construction machine is provided on a lower traveling body, an upper revolving body constituting a main body of a working machine rotatably mounted on the lower traveling body, and provided in front of the upper revolving body. And a working device. Further, the upper revolving structure includes a revolving frame, a machine room provided on the revolving frame and covered with a building cover, a driver's cab provided on a front left side of the machine room, and a And a counterweight attached to the end.

Further, the working device includes a boom mounted on the upper revolving body so as to be able to move up and down, an arm mounted on the tip side of the boom so as to be able to move up and down, and a rotatable arm mounted on the tip side of the arm. The system includes a mounted bucket, a boom cylinder, an arm cylinder, a bucket cylinder, and the like for operating the bucket.

[0004] The boom cylinder, arm cylinder, and bucket cylinder are configured to expand and contract by pressure oil supplied and discharged from a hydraulic pump provided in a machine room via a supply and discharge pipe.

[0005] Each of the supply / discharge pipes is, for example, a fixed pipe fixed to the machine room side, a fixed pipe fixed to the outer surface of a boom or the like, and a portion between the upper rotating body and the boom. A hydraulic hose or the like that connects the fixed pipe on the machine room side and the fixed pipe on the boom side, and the hydraulic hose has flexibility to allow the boom to move up and down with respect to the upper swing body, It is bent to form a slack.

Further, the hydraulic hoses of the respective supply / discharge pipes are bound in an aligned state by a hose clamp provided in the middle thereof, thereby preventing interference between adjacent hydraulic hoses.

In the hydraulic shovel according to the prior art configured as described above, by operating a lever or the like in the operator's cab, the hydraulic oil is supplied from the machine room to the lower traveling body to travel, or the supply / discharge pipe is connected. By operating the boom, arm, and bucket by supplying pressure oil to the hydraulic cylinder via the hydraulic cylinder, excavation work of earth and sand is performed by the bucket.

[0008]

However, in the above-described hydraulic excavator according to the prior art, a plurality of hydraulic hoses constituting a supply / discharge pipe are merely bound by a hose clamp. The boom may fall left or right, in which case,
The hydraulic hoses come into frictional contact with each other or bend extremely with a small curvature. For this reason, there is a problem that the hydraulic hose is deteriorated or damaged in an early stage, and the life is shortened as compared with the normal life.

When the boom is lifted with respect to the upper revolving unit, the hydraulic hose is bent in an arc shape so as to protrude rearward, so that the hydraulic hose may hang down due to its own weight. In this case, the hydraulic hose is extremely bent with a small curvature, or comes into contact with the building cover of the upper revolving structure, which also causes wear and damage of the hydraulic hose and shortens the service life. There's a problem.

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 prevent the hose of the supply / discharge pipe from falling down or being extremely bent, thereby preventing damage to the hose. To provide improved construction machinery.

[0011]

SUMMARY OF THE INVENTION A construction machine according to the present invention includes a working machine main body, a working machine provided on the working machine main body so as to be able to move upward and downward, and operated by a hydraulic cylinder, and extending along the working machine. A plurality of supply / discharge pipes, each of which is a hose whose part between the working device and the working machine main body is bent in a curved shape, and provided in the middle of each of the supply / discharge pipe hoses, And a hose clamp for binding them in an aligned state.

Then, in order to solve the above-mentioned problem,
A feature of the configuration adopted by the invention of claim 1 is that a strip having a spring property is provided which extends along each of the hoses and bends in accordance with the elevating movement when the working device is elevating and lowering. The strip plate is configured to be supported using the hose clamp.

[0013] With this configuration, since the strip provided so as to be bent in response to the upward and downward movement of the working device has rigidity in the left-right direction of the hose, the hose is not stiff. Prevent falling in the direction. Further, when the working device is raised and lowered, the band plate prevents the hose from being extremely bent at a small curvature due to its spring property.

According to a second aspect of the present invention, the hose clamp has a structure in which a plurality of clamp members are connected in a vertical direction facing each other, the hose is sandwiched between the pair of clamp members in the vertical direction, and the band plate is formed of a pair of clamp members. The configuration is such that the clamp member is sandwiched between two pairs of adjacent clamp members.

With this configuration, the hose and the band plate can be simultaneously held between the clamp members,
The strip can be easily supported by the hose clamp.
Further, the space between adjacent hoses can be effectively used as a mounting space for the band plate.

According to a third aspect of the present invention, at least two hose clamps are provided on the hose at intervals, and the strip is fixed between the hose clamps. Thus, the band plate is supported by the hose using the hose clamps provided at at least two places, so that the band plate prevents the hose from being twisted.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A construction machine according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings, taking a loader bucket type hydraulic excavator as an example.

Reference numeral 1 denotes a lower traveling body, and 2 denotes an upper revolving body constituting a main body of a working machine which is pivotably mounted on the lower traveling body 1.
The upper revolving unit 2 includes a machine room 4 provided on a revolving frame 3, an operator cab 5 provided on the front left side of the machine room 4,
A counter weight 6 and the like are provided at the rear side of the turning frame 3 at the rear side of the machine room 4.

Reference numeral 7 denotes a working device provided on the front side of the upper revolving unit 2 so as to be able to move up and down. The working device 7 includes a boom 8, an arm 9, a bucket 10, a boom cylinder 11, an arm cylinder 12, and a hydraulic cylinder. It is roughly composed of a cylinder 13, a bucket cylinder 14, and the like. here,
As shown in FIG. 2, the boom 8 is located at a front portion of the revolving frame 3 and is attached to a support bracket 15 via a pin 16 so as to be able to move up and down.

Are supply / discharge pipes for supplying / discharging hydraulic oil from a hydraulic pump (not shown) in the machine chamber 4 to the hydraulic cylinders 11 to 14; Are a fixed pipe 18 fixed to the machine room 4 side, a fixed pipe 19 fixed to the upper surface of the boom 8, the upper swing body 2 and the boom 8
The hydraulic hose 20 has one end connected to the base 18A of the fixed pipe 18 on the machine room 4 side and the other end connected to the base 19A of the fixed pipe 19 on the boom 8 side. And so on. In addition, each supply / discharge pipe 17
, Connected to the bucket cylinder 14 and the like, extend toward the distal end side of the boom 8 and are fixed on the arm 9 via a hydraulic hose 21 (shown in FIG. 1). ing.

Here, the hydraulic hose 20 has flexibility to allow the boom 8 to move up and down with respect to the upper swing body 2, and the hydraulic hose 21 has flexibility to allow the arm 9 to move up and down with respect to the boom 8. To form a slack that is bent in a curved shape in the front-rear direction.

Are three hose clamps provided on the hydraulic hose 20 of each supply / discharge pipe 17, and each of the hose clamps 22 is a hydraulic hose 20 as shown in FIG.
4 and 5, a first clamp member 23, a second clamp member 24, a connecting plate 26, and the like, which will be described later.

Reference numerals 23, 23,... Denote, for example, five consecutive first clamp members in accordance with the number of hydraulic hoses 20, and each of the first clamp members 23 is arranged on the upper surface side as shown in FIG. It has a semicircular groove 23A that is positioned to support the hydraulic hose 20, and has fitting step portions 23B, 23B to which band plates 29, 30 described later are fitted at both ends on the upper surface side. Further, bolt insertion holes 23C, 23C are provided at both ends of the first clamp member 23 so as to penetrate substantially the center of the fitting step portion 23B in the vertical direction.

24, 24,... Are the first clamp members 2
The second clamp members 24 are provided on the upper surface of the third clamp member 23, and each of the second clamp members 24 is located on the lower surface side facing the first clamp member 23. Hydraulic hose 2 together with semicircular groove 23A of clamp member 23
0, and a fitting step 24B to which the strips 29 and 30 are fitted is provided at both ends on the lower surface side with the fitting step 2
3B. Further, on both end sides of the second clamp member 24, bolt insertion holes 24C, 24C which are continuous with the bolt insertion holes 23C are provided. Further, on the upper surface side of the second clamp member 24, a pressing plate 25 for pressing the entire second clamp member 24 is provided.

Reference numeral 26 denotes a connecting plate extending in the left-right direction perpendicular to each hydraulic hose 20. The connecting plate 26 connects the five clamp members 23 and 24 so as to be connected in series. It is formed in a long plate shape. In addition, the connecting plate 26
The bolt insertion holes 23 of the clamp members 23 and 24
C, 24C, ten screw holes 26A, 26A,
... (only three are shown) are formed.

Are clamp members 23, 2
4. Ten bolts provided over the connecting plate 26 and the like are inserted into the bolt insertion holes 23C and 24C of the clamp members 23 and 24 via the holding plate 25, and the ends thereof are connected. Each of the clamp members 23 and 24 is fastened to the connection plate 26 by being fastened to the screw hole 26 </ b> A of the plate 26.
Etc. are fixed.

The hose clamp 22 supports each hydraulic hose 20 between the semicircular grooves 23A, 24A so as to be sandwiched between the first clamp member 23 and the second clamp member 24. Each clamp member 2
By fixing 3, 24 to the connecting plate 26, respectively,
This is for binding the hydraulic hoses 20 in an aligned state.

Reference numerals 28, 28 denote fixed pipes 18, 19, respectively.
In another hose clamp (shown in FIG. 3) provided in
Each of the hose clamps 28 is attached to the ferrules 18A and 19A formed to have a larger diameter than the hydraulic hose 20, and is therefore slightly larger than the hose clamp 22 described above. However, other hose clamps 2
8 has the same configuration as that of the hose clamp 22 except that the size of the hose clamp 22 is different, and the description thereof will be omitted. One of the hose clamps 28 is attached to the base 18A of the fixed pipe 18 fixed to the machine room 4 side, and the other hose clamp 28 is connected to the fixed pipe 19 fixed to the boom 8 side. Base 19
A.

Are provided between the hydraulic hoses 20, and are four strips extending along the respective hydraulic hoses 20. Each of the strips 29 is made of a spring steel material having elasticity. The hydraulic hose 20 is formed with a length substantially equal to the length of the hydraulic hose 20. Further, the band plate 29 is provided with fitting step portions 23B, 24B of the adjacent clamp members 23, 24.
It is sandwiched between them, and is formed wide across the respective fitting step portions 23B and 24B. Furthermore, the strip 29
As shown in FIG. 7, two bolt insertion holes 29A, 29A,
... are formed.

Numerals 30 and 30 are provided outside the hydraulic hoses 20 and 20 provided at both left and right ends, respectively, and are two band plates extending along each of the hydraulic hoses 20. Board 3
Numeral 0 is made of a spring steel material having elasticity similarly to the above-mentioned band plate 29, and is formed with a length substantially equal to the length of the hydraulic hose 20. Further, the band plate 30 is sandwiched between the fitting step portions 23B and 24B of the clamp members 23 and 24, and has a narrow width that fits within the fitting step portions 23B and 24B. Further, in the band plate 30, bolt insertion holes 30A, 30A,... (Only one is shown) are formed at five locations corresponding to the number of the hose clamps 22, 28, respectively.

The strips 29, 30 are connected to the fitting step 23B of the first clamp member 23 and the second clamp member 24.
Are fixed to the hose clamp 22 by bolts 27 inserted into the bolt insertion holes 29A, 30A in a state of being fitted between the fitting step portions 24B. In addition, the band plate 29,
30 has one end fixed to a hose clamp 28 attached to the fixed pipe 18 on the machine room 4 side, and the other end fixed to a hose clamp 28 attached to the fixed pipe 19 on the boom 8 side.

As a result, the strips 29 and 30 are arranged in a flat plate shape in the front-rear direction with respect to the hydraulic hose 20 connected in a curved shape. Therefore, the strips 29 and 30 have a large rigidity against falling in the left-right direction, and can prevent the hydraulic hose 20 from falling in the left-right direction. On the other hand, the strips 29 and 30 have low rigidity against movement in the front-rear direction,
When the boom 8 is raised and lowered, the hydraulic hose 20 bound by the hose clamp 22 is supported, and the hydraulic hose 20 can be bent with a large curvature by its spring property.

The hydraulic shovel according to the present embodiment has the above-described configuration. Next, the operation of the hydraulic shovel will be described.

First, by operating a lever and a pedal (both not shown) in the cab 5 and supplying hydraulic oil supplied from a hydraulic pump in the machine room 4 to the lower traveling body 1, The lower traveling body 1 is caused to travel. In addition, the hydraulic oil from the hydraulic pump is supplied to the hydraulic cylinders 11 to 14 of the working device 7 through the respective supply / discharge pipes 17, and the boom 8, the arm 9, and the bucket 10 are operated. Excavation work is performed.

Next, each supply / drain pipe 17 during excavation work
Of the hydraulic hose 20 will be described.

First, as shown in FIG.
1 and the boom 8 is lowered,
Hydraulic hose 20 is bent in an arc shape so as to protrude upward.

In this case, the hydraulic hose 20 tends to fall in the left-right direction due to the posture, shaking, or the like at the time of work. In this embodiment, however, the band plates 29 and 30 prevent the hydraulic hose 20 from falling. It is possible to prevent the hydraulic hose 20 from being extremely bent with a small curvature, and prevent the hydraulic hoses 20 from frictionally contacting each other.

On the other hand, as shown in FIG.
1 and the boom 8 is lifted,
Since the fixed pipes 18 and 19 of 7 come close to each other, the slack of the hydraulic hose 20 increases, the hydraulic hose 20 bends so as to protrude rearward, and the hydraulic hose 20 tends to hang down by its own weight. I do.

However, in this embodiment, the hydraulic hose 20 is provided with the strips 29, 30 having a spring property against the movement in the front-rear direction.
8, it is possible to prevent the hydraulic hose 20 from hanging down by its own weight as shown by the two-dot chain line in FIG. 8, and to bend the hydraulic hose 20 in the front-rear direction with a large curvature.

Therefore, according to the present embodiment, the strips 29, 3
Since 0 can prevent the hydraulic hose 20 from falling in the left-right direction, it is possible to prevent the adjacent hydraulic hoses 20 from frictionally contacting each other or to prevent the hydraulic hoses 20 from being extremely bent with a small curvature. As a result, early deterioration and damage of the hydraulic hose 20 can be prevented, and the life of the hydraulic hose 20 can be extended.

By raising the boom 8 with respect to the upper swing body 2, even when the hydraulic hose 20 is formed in an arc shape so as to protrude rearward, the spring force of the band plates 29, 30 allows the hydraulic hose 20 to be formed in an arc shape. It is possible to prevent the hydraulic hose 20 from hanging down due to its own weight. This makes it possible to bend the hydraulic hose 20 in the front-rear direction with a large curvature, thereby preventing the hydraulic hose 20 from coming into contact with a building cover or the like of the machine room 4, thereby further extending the life of the hydraulic hose.

Since the band plates 29, 30 are sandwiched between the fitting step portions 23B, 24B of the clamp members 23, 24, the band plates 29, 30 can be easily attached to the hose clamp 22. Assembly workability can be improved. Moreover, since the band plate 29 is arranged between the hoses 20 and is sandwiched between the adjacent clamp members 23 and 24,
The space between the hydraulic hoses 20 can be effectively used as a mounting space for the band plate 29.

Further, fitting step portions 23B, 24B are formed on the clamp members 23, 24, and the fitting step portions 23B, 24B
The band plates 29, 30 are fitted to the
30 can be prevented from contacting the adjacent hydraulic hose 20 or the like, and the hydraulic hose 20 can be prevented from being damaged.

The hose clamp 22 is connected to the hydraulic hose 2
Since the band plates 29, 30 are supported by the hose clamps 22, the hydraulic hose 20 can follow the band plates 29, 30. The torsion of the hose 20 can be prevented.

In the embodiment, a case where the band plate 29 is disposed between the adjacent hydraulic hoses 20 and the band plate 30 is disposed outside the hydraulic hoses 20 located at the left and right ends, respectively, is taken as an example. Although described above, the present invention is not limited to this,
For example, a strip may be provided only between the hydraulic hoses, or a strip may be provided only outside the hydraulic hose.

Further, in the embodiment, the case where the hose clamps 22 are provided at the three positions of the hydraulic hose 20 is exemplified, but the hose clamps may be provided at two or four or more positions of the hydraulic hose.

Further, when bundling four or less hydraulic hoses, the first clamp member, the second clamp member and the like may be reduced and the connecting plate may be shortened in accordance with the number of clamp members. Further, when binding six or more hydraulic hoses, the number of the first clamp members, the second clamp members, and the like may be increased, and the connecting plate may be elongated according to the number of the clamp members.

In the embodiment, the strips 29 and 30 are connected to the hydraulic hose 20 provided between the upper swing body 2 and the boom 8.
Is provided, but the band plate is connected to the boom 8 and the arm 9.
May be provided on the hydraulic hose 21 provided between the above.

Also, in the embodiment, the loader bucket type hydraulic excavator has been described as an example of the working device.
The present invention is not limited to this, and may be used for a backhoe type excavator.

Further, in the embodiment, the excavator is described. However, the excavator may be used for another construction machine such as a backhoe.

[0051]

As described in detail above, according to the first aspect of the present invention, the hose constituting the supply / discharge pipe is supported in the left-right direction by the strip, so that frictional contact or extreme bending due to the fall of the hose is achieved. Therefore, early deterioration and damage of the hose can be prevented, and the life can be extended. Also, when the working device is raised and lowered, the hose can be bent back and forth with a large curvature by the spring property of the strip, so that the hose can be prevented from contacting the building cover of the machine room, and the life of the hose can be prevented. Can be further extended.

According to the second aspect of the present invention, since the hose and the band plate can be simultaneously held by the hose clamp, the work of attaching the band plate can be simplified, and the assembling workability can be improved. Further, the space between adjacent hoses can be effectively used as a mounting space for the band plate.

According to the third aspect of the present invention, the strip is supported on each hose by using the hose clamps provided at least at two places. Therefore, the strip can prevent the hose from being twisted, and can prevent the adjacent hose from being twisted. Interference can be prevented.

[Brief description of the drawings]

FIG. 1 is a side view illustrating a hydraulic excavator according to an embodiment of the present invention.

FIG. 2 is an enlarged side view showing a main part of the upper revolving unit, a working device, a supply / discharge pipe and the like in FIG. 1 in an enlarged manner.

FIG. 3 is an enlarged external view showing a hydraulic hose, a hose clamp, and a strip.

FIG. 4 is a cross-sectional view of the hydraulic hose, the hose clamp, and the strip, as viewed from the direction indicated by arrows IV-IV in FIG.

FIG. 5 shows a hydraulic hose, a hose clamp and a strip.
FIG.

FIG. 6 is an enlarged sectional view of the hydraulic hose, the hose clamp, and the strip, as viewed from the direction indicated by arrows VI-VI in FIG.

FIG. 7 is a plan view showing a state in which the band plate is extended flat.

FIG. 8 is a side view of a main part enlarged showing the state where the boom is lifted with respect to the upper revolving unit, as viewed from the same position as in FIG. 2;

[Explanation of symbols]

 2 Upper revolving superstructure (working machine main body) 7 Working device 17 Supply / discharge piping 20 Hydraulic hose (hose) 22 Hose clamp 23 First clamp member 24 Second clamp member 29, 30 Strip

Claims (3)

[Claims] 1. A work machine main body, a work device provided so as to be able to move up and down on the work machine main body, and operated by a hydraulic cylinder, and provided extending along the work device. A plurality of supply / discharge pipes, each of which is a hose that bends in a curved shape, and a hose clamp that is provided in the middle of each of the supply / discharge pipe hoses and binds the hoses in an aligned state. In the construction machine, a strip having a spring property is provided which extends along each of the hoses and is bent in accordance with the elevating movement when the working device is elevating and lowering, and the hose plate is provided with the hose clamp. A construction machine characterized in that the construction machine is supported by using a construction. 2. The hose clamp according to claim 1, wherein the hose clamp includes a plurality of clamp members that face each other in a vertical direction, the hose is sandwiched by a pair of clamp members in a vertical direction, and the strips are adjacent to each other. The construction machine according to claim 1, wherein the construction machine is configured to be held between two pairs of clamp members. 3. The construction machine according to claim 1, wherein the hose clamp is provided at at least two places on the hose with an interval, and the strip is fixed between the hose clamps.