JPH11107310A - Piping installation structure in arm mechanism and installation method thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a piping member from abrading by coming in contact with a surrounding thing during work, for example, and to facilitate installation of a piping member to securely fix it in piping installation structure in an arm mechanism and an installation method thereof. SOLUTION: A structure is provided with an arm mechanism having a hollow arm member 103, and piping members 1, 2 to supply/discharge hydraulic fluid to/from a cylinder type actuator mechanism to drive the arm mechanism and a work member installed on the arm mechanism by expansion/contraction action, and at least the piping member 2 as part of the piping members 1, 2 is disposed to pass the inside of the hollow arm member 103. The piping member 2 is supported by an inflation member 5 filled in the hollow arm member 103, so the piping member 2 is installed inside the hollow arm part 103.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipe mounting structure and a pipe mounting method for supplying and discharging hydraulic oil for construction machines such as hydraulic shovels, and more particularly, to a structure and a method for mounting a pipe in an arm mechanism. About the method.

[0002]

2. Description of the Related Art Conventionally, a construction machine such as a hydraulic shovel, which is a type of work machine, is provided with an upper swing body (construction machine main body) 102 on a lower traveling body 100 so as to be swingable, as shown in FIG. Have been. The upper revolving superstructure 102 includes a main frame 114 and a driving operation room 101, an engine room 111,
It comprises a hydraulic oil tank 112, a fuel tank 113 and the like.

[0003] A pin 1 is attached to the upper rotating body 102.
The boom 103 is connected rotatably in the up and down direction by 03A, and the stick 104 is connected to the tip of the boom 103 by the pin 103B so as to be rotatable in the up and down direction or the front and rear direction. Note that the boom 103 and the stick 104 are configured as hollow arm members, and the boom 103 and the stick 104 constitute an arm mechanism.

Further, a bucket (working member) 108 is attached to the tip of the stick 104 with a pin 104A.
Are connected so as to be rotatable in a vertical direction or a front-rear direction. In addition, the distance between the ends of the upper revolving superstructure 102 and the boom 103 expands and contracts, so that the
Boom drive hydraulic cylinder (boom drive actuator) 105 for rotating the boom with respect to the upper swing body 102
Is interposed.

Further, a boom 103 and a stick 104
A hydraulic cylinder for driving a stick (stick driving actuator) 106 for rotating the stick 104 with respect to the boom 103 due to expansion and contraction of the distance between the ends is interposed therebetween. Also stick 1
Between the bucket 04 and the bucket 108, a bucket driving hydraulic cylinder (bucket driving actuator, working member driving hydraulic cylinder) 107 for rotating the bucket 108 with respect to the stick 104 by expanding and contracting the distance between the ends. Is interposed.

The bucket driving hydraulic cylinder 1
07 is the bucket 108 via the rods 109 and 110.
Is pivoted to. The boom driving actuator 105, the stick driving actuator 106,
The actuator 107 for bucket driving forms a cylinder type actuator mechanism.

The boom drive actuator 105, stick drive actuator 106, and bucket drive actuator 107 supply hydraulic oil from a pump driven by an engine via a piping member or the like (not shown). It can be evacuated.
Here, a mounting structure of a pipe member for supplying and discharging hydraulic oil to the stick driving actuator 106 and the bucket driving actuator 107 will be described with reference to FIG.

As shown in FIG. 7, the boom 103 includes an upper plate 103a, a lower plate 103b, a side plate 103c,
d, and the cross section thereof is configured to be substantially rectangular. The stick piping member 121 and the bucket piping member 122 are arranged on the outer surface of the upper plate 103a, and are fixed by the plurality of mounting members 123. Have been. As described above, in the conventional construction machine, the mounting structure of the stick piping member 121 and the bucket piping member 122 is an external piping structure.

[0009]

However, in such a conventional construction machine, the stick piping member 121 is used.
Since the mounting structure of the bucket piping member 122 is an external piping structure, there is a possibility that the stick piping member 121 or the bucket piping member 122 may come into contact with surroundings during work, for example, and in particular, due to the contact. When the influence is large, supply and discharge of hydraulic oil to the stick driving actuator 106 for driving the stick 104 or the bucket driving actuator 107 for driving the bucket 108 may not be performed.

[0010] The possibility of such contact with surrounding objects increases as the length of the pipe member increases. Further, in the conventional construction machine, the stick piping member 121 and the bucket piping member 122 are exposed to the outside, which is not preferable in aesthetic appearance. For this reason, an internal piping structure in which the stick piping member 121 and the bucket piping member 122 are disposed in the boom 103 configured as, for example, a hollow arm member may be considered.

However, the stick piping member 12
1 and the bucket piping member 122 are simply
If the pipe member is merely loosely inserted into the boom 103, the stick member 121 and the bucket member 122 are rubbed in the boom 103 because the stick member 121 and the bucket member 122 move inside the boom 103. In addition, the stick piping member 12
Movement of the piping member 1 and the bucket piping member 122 causes noise.

For this reason, even when the mounting structure of the stick piping member 121 and the bucket piping member 122 is an internal piping structure, similarly to the above-described external piping structure, the stick piping member 121 and the bucket piping member 122 are attached. It is necessary to fix the pipe member 122 by, for example, an attachment member 123 as shown in FIG. 7, but the fixing operation is not easy.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problems, and it is intended to prevent a pipe member from being rubbed by being in contact with, for example, surroundings during work, and to facilitate installation of the pipe member. An object of the present invention is to provide a pipe mounting structure and a mounting method in an arm mechanism that can be securely fixed.

[0014]

According to the first aspect of the present invention, there is provided a pipe mounting structure in an arm mechanism according to the present invention, wherein the arm mechanism having a hollow arm member and the arm mechanism by performing an extension / contraction operation. A pipe member for supplying and discharging hydraulic oil to and from a cylinder-type actuator mechanism that drives a working member mounted on the arm mechanism; at least a part of the pipe members among the pipe members moves inside the hollow arm member; The piping member is mounted in the hollow arm portion by being disposed so as to pass through, and the piping member is supported by an expansion member filled in the hollow arm member. It is characterized by.

According to a second aspect of the present invention, there is provided a pipe mounting structure in an arm mechanism according to the first aspect of the present invention, wherein the pipe member is loosely inserted into the hollow arm member to pass therethrough. A guide portion is provided, and the pipe member is supported by the balloon-type inflatable member filled in the guide portion, so that the pipe member is mounted in the hollow arm portion.

According to a third aspect of the present invention, there is provided a pipe mounting structure in an arm mechanism according to the first aspect, wherein the arm mechanism has a hollow shape whose one end is rotatably connected to a construction machine body. A boom and a stick having one end rotatably connected to the boom are provided, and the cylinder-type actuator mechanism is interposed between the construction machine body and the boom. A boom drive hydraulic cylinder that rotates the boom with respect to the construction machine main body due to expansion and contraction of the distance between the parts, and a distance between the ends that is interposed between the boom and the stick expands and contracts A hydraulic cylinder for driving the stick to rotate the stick with respect to the boom, and a hydraulic cylinder interposed between the stick and the working member for extending and contracting the working member by expanding and contracting the distance between the ends. A hydraulic cylinder for driving the working member to be rotated with respect to the hydraulic member, so that at least a piping member for the hydraulic cylinder for driving the working member among the piping members passes through the hollow boom. The pipe member is mounted in the hollow arm by being disposed and supported by a balloon-type inflatable member filled in the hollow boom. And

According to a fourth aspect of the present invention, there is provided a cylinder type actuator mechanism for driving an arm mechanism and a working member by performing expansion and contraction operations on an arm mechanism having a hollow arm member. A method of fixing a pipe member for supplying and discharging hydraulic oil to and from a pipe, wherein at least a part of the pipe member and a balloon-type inflatable member in a contracted state are floated in the hollow arm member. A first step of passing in a fitted state, and after the first step, inflating the balloon-type inflatable member to support the pipe member in the hollow arm member, thereby connecting the pipe member to the hollow member. And a second step of mounting in the arm portion.

[0018]

Embodiments of the present invention will be described below with reference to the drawings. First, a description is given, with reference to FIGS. 1 and 2, of a structure and a method for mounting a pipe in an arm mechanism according to a first embodiment of the present invention. The pipe mounting structure and the mounting method in the arm mechanism according to the present embodiment are employed in a construction machine such as a hydraulic shovel, which is a type of a working machine.

In such a construction machine, an upper revolving unit (construction machine body) 102 is provided on the lower traveling unit 100 so as to be revolvable, as described in the prior art (see FIG. 6). The upper revolving unit 102 has a main frame 114
And an operation room 101, an engine room 111, and a hydraulic oil tank 11 provided on the main frame 114.
2, the fuel tank 113 and the like.

The upper revolving unit 102 has a pin 1
The boom 103 is connected rotatably in the up and down direction by 03A, and the stick 104 is connected to the tip of the boom 103 by the pin 103B so as to be rotatable in the up and down direction or the front and rear direction. Note that the boom 103 and the stick 104 are configured as hollow arm members, and the boom 103 and the stick 104 constitute an arm mechanism.

Further, a bucket (working member) 108 is pivotally connected to the tip of the stick 104 by a pin 104A so as to be rotatable in the vertical direction or the front and rear direction. A boom drive hydraulic cylinder (boom drive actuator) 105 that rotates the boom 103 with respect to the upper swing body 102 by expanding and contracting the distance between the end portions between the upper swing body 102 and the boom 103. Is interposed.

Further, the boom 103 and the stick 104
A hydraulic cylinder for driving a stick (stick driving actuator) 106 for rotating the stick 104 with respect to the boom 103 due to expansion and contraction of the distance between the ends is interposed therebetween. Also stick 1
Between the bucket 04 and the bucket 108, a bucket driving hydraulic cylinder (bucket driving actuator, working member driving hydraulic cylinder) 107 for rotating the bucket 108 with respect to the stick 104 by expanding and contracting the distance between the ends. Is interposed.

The bucket driving hydraulic cylinder 1
07 is the bucket 108 via the rods 109 and 110.
Is pivoted to. The boom driving actuator 105, the stick driving actuator 106,
The actuator 107 for bucket driving forms a cylinder type actuator mechanism.

The boom driving actuator 105, the stick driving actuator 106, and the bucket driving actuator 107 respectively supply hydraulic oil from a pump driven by an engine via piping members and the like (not shown). Supply and discharge can be performed. Next, the mounting structure of the stick piping member 1 and the bucket piping member 2 for supplying and discharging the hydraulic oil to the stick driving actuator 106 and the bucket driving actuator 107, which is a feature of the present embodiment, will be described.

FIG. 1 is a schematic diagram showing a boom 103 of a construction machine according to the present embodiment, to which a stick piping member 1 and a bucket piping member 2 are attached.
As shown in FIG. 1, the stick piping member 1 and the bucket piping member 2 are mounted in a boom 103 configured as a hollow arm member. That is, the boom 103 includes the upper plate 103a, the lower plate 103b, and the side plate 1
03c and a side plate 103d, and the cross section is configured to be substantially rectangular. And the side plate 1
A channel member (guide portion) 4 extends over the entire inner surface of 03d, and a stick piping member 1 and a bucket piping member 2 are disposed so as to pass through the inside of the channel member 3. .

Although the channel member 3 is provided on the side plate 103d here, it may be provided on another side plate 103c or on the upper plate 103a or the lower plate 103b.
The channel member 3 is provided on the side plate 103d of the boom 103.
The channel member 3 and the side plate 103 of the boom 103 have a substantially rectangular closed cross section when attached to the inner surface of the boom 103.
The pipe member for stick 1 and the pipe member for bucket 2 are inserted into the space formed by d.

The channel member 3 may be configured to have a substantially circular cross section in a state where the channel member 3 is attached to the inner surface of the side plate 103d of the boom 103. Both ends 3a and 3b of the channel member 3 are open, and an opening 4 is formed at a substantially central portion thereof. A front side plate 103e is attached to an end of the boom 103, and a piping opening 103f is formed in the front side plate 103e. The upper plate 103a of the boom 103 is provided with piping openings 103g and 103h.

The stick piping member 1 and the bucket piping member 2 are introduced into the channel member 3 through the piping opening 103f and the one end 3a of the channel member 3. On the other hand, the stick piping member 1 is led out toward the stick driving actuator 106 through the opening 4 and the piping opening 103g. It is led out toward the bucket driving actuator 107 through the end 3b and the pipe opening 103h.

Here, the pipe opening 103f
Is formed in the front side plate 103e, but is not limited to this. The pipe opening 103f is formed in the upper plate 103a.
May be formed at the base side of the. Also, the pipe opening 103
f and one end 3a of the channel member 3 are connected by a guide member (not shown), and the stick piping member 1 and the bucket piping member 2 are introduced through the guide member. This is more preferable in protecting the piping member 1 and the bucket piping member 2.

Similarly, if the opening 4 of the channel member 3 and the opening 103g for piping are connected by a guide member (not shown), and the piping member 1 for stick is led out via this guide member, This is more preferable in protecting the stick piping member 1, and the other end 3 b of the channel member 3 and the piping opening 103 h are connected by a guide member, and the stick piping member is connected through the guide member. If the member 1 is led out, it is more preferable to protect the stick piping member 1.

As described above, in the construction machine according to the present embodiment, the channel member 3 is mounted in the boom 103,
By arranging the stick piping member 1 and the bucket piping member 2 so as to pass through the inside of the channel member 3, the stick piping member 1 and the bucket piping member 2 are arranged.
Has an internal piping structure. By the way, simply by sticking the stick piping member 1 and the bucket piping member 2 loosely through the channel member 3, the stick piping member 1 and the bucket piping member 2 are securely fixed in the channel member 3. And the pipe member 1 for the stick and the pipe member 2 for the bucket
In the pipe member 1 for the stick.
In addition, there is a possibility that the bucket piping member 2 may rub against the inner wall surface of the boom 103.

For this reason, in the present embodiment, the stick piping member 1 and the bucket piping member 2 are fixed in the channel member 3 as described below. First, as shown in the schematic cross-sectional view of FIG. 2A, the stick piping member 1 and the bucket piping member 2 are passed through the channel member 3 in a loosely fitted state, and the balloons (expansion members, The balloon-type inflatable member 5 is also passed through the channel member 3 in a loosely fitted state (first step). In this case, the balloon 5 having an elongated shape having substantially the same length as the channel member 3 is used.

Next, as shown in the schematic sectional view of FIG. 2B, the balloon 5 passed through the channel member 3 in a loosely fitted state.
Is expanded, and the pressure of the inflated balloon 5 presses and supports the stick piping member 1 and the bucket piping member 2 against the channel member 3 and the side plate 103d of the boom 103 to thereby support the stick piping member 1 and the bucket piping. The member 2 is mounted in the channel member 3 (second step).

The arrangement of the stick piping member 1 and the bucket piping member 2 in the channel member 3 can be appropriately selected. As described above, in the present embodiment, the balloon 5 is filled in the channel member 3 and the balloon 5
By supporting the stick piping member 1 and the bucket piping member 2 with the stick, the stick piping member 1 and the bucket piping member 2 are mounted in the boom 103,
This ensures that the stick piping member 1 and the bucket piping member 2 are fixed so as not to move in the channel member 3.

According to the pipe mounting structure in the arm mechanism and the mounting method according to the first embodiment of the present invention, the pipe member 1 for sticks and the pipe member 2 for buckets are mounted in the boom 103. In addition, there is an advantage that the bucket piping member 2 can be prevented from being rubbed by contact with surroundings during work, for example.

The channel member 3 is installed in the boom 103.
The balloon member 5 is filled in the channel member 3, and the stick piping member 1 and the bucket piping member 2 are supported by the balloon 5, so that the stick piping member 1 and the bucket piping member 2 are boom 103.
The stick piping member 1 and the bucket piping member 2 can be easily mounted, and the stick piping member 1 and the bucket piping member 2 can be securely fixed in the boom 103. There is also an advantage.

Next, a description will be given, with reference to FIGS. 3 and 4, of a structure and a method for mounting a pipe in an arm mechanism according to a second embodiment. As shown in FIGS. 3 and 4, the pipe mounting structure and the mounting method in the arm mechanism according to the present embodiment are different from those of the first embodiment in the channel member. In other words, the boom 103 is installed in the pipe mounting structure in the arm mechanism.
The stick channel member 10 and the bucket channel member 11 are mounted therein, and the stick driving actuator 106 is provided in the stick channel member 10.
Pipe member 1 for supplying and discharging hydraulic oil
The bucket pipe member 2 for supplying and discharging hydraulic oil to and from the bucket driving actuator 107 is mounted in the bucket channel member 11.

In this case, the stick channel member 1
0 is the boom 1 on the side surface of the side plate 103c of the boom 103.
It extends from the processing part 103f for piping formed in 03 to the opening 103g for piping. The balloon 12 to be introduced into the stick channel member 10 has an elongated shape having a length substantially equal to that of the stick channel member 10.

The bucket channel member 11 is
Like the channel member 3 of the first embodiment described above, the boom 103 extends substantially over the entire length of the side plate 103d of the boom 103.
The balloon 13 introduced into the bucket channel member 11 has an elongated shape having a length substantially equal to that of the bucket channel member 11. It should be noted that the bucket channel member 11 includes,
It is not necessary to form an opening as in the channel member 3 of the first embodiment described above.

The other configuration is the same as that of the first embodiment, and the description is omitted here.
Also, the method of mounting the stick piping member 1 and the bucket piping member 2 in the stick channel member 10 and the bucket channel member 11 is the same as in the first embodiment, and FIG. Stick channel member 10 and bucket channel member 1
1, the stick piping member 1 and the bucket piping member 2 are supported in the stick channel member 10 and the bucket channel member 11, respectively, whereby the stick piping member 1 and the bucket piping member 2 are supported. Is mounted in the boom 103.

Therefore, according to the pipe mounting structure in the arm mechanism and the mounting method according to the present embodiment, the stick pipe member 1 and the bucket pipe member 2 are mounted in the boom 103 as in the first embodiment. In addition, there is an advantage that the stick piping member 1 and the bucket piping member 2 can be prevented from being damaged by coming into contact with surroundings during work, for example.

The stick channel member 10 and the bucket channel member 11 are mounted in the boom 103, and the balloon 12 and the balloon channel 12 are mounted in the stick channel member 10 and the bucket channel member 11, respectively.
Since the balloon 13 and the balloon 13 support the stick piping member 1 and the bucket piping member 2, the stick piping member 1 and the bucket piping member 2 are mounted in the boom 103. The stick piping member 1 and the bucket piping member 2 can be mounted more easily, and the stick piping member 1 and the bucket piping member 2 can be more securely fixed in the boom 103.

Next, a description will be given, with reference to FIG. 5, of a structure and a method for mounting a pipe in an arm mechanism according to a third embodiment. As shown in FIG. 5, the pipe mounting structure in the arm mechanism and the mounting method according to the present embodiment differ from the first embodiment in that the channel member is not mounted.

That is, in this embodiment, the stick piping member 1, the bucket piping member 2, and the balloon 20 are provided in the boom 103, and the stick piping member 1 and the bucket piping member 2 are supported by the balloon 20. Thus, the stick piping member 1 and the bucket piping member 2
Is mounted inside the boom 103. The balloon 20 introduced into the boom 103 is formed in an elongated shape having a length substantially equal to that of the boom 103.

The other configuration is the same as that of the first embodiment, and the description is omitted here.
Also, the method of attaching the stick piping member 1 and the bucket piping member 2 to the inside of the boom 103 is the same as in the first embodiment, and FIG. A state is shown in which the stick piping member 1 and the bucket piping member 2 are mounted inside the boom 103 by supporting the member 1 and the bucket piping member 2 inside the boom 103.

Therefore, according to the pipe mounting structure and the mounting method in the arm mechanism according to the present embodiment, the stick pipe member 1 and the bucket pipe member 2 are mounted in the boom 103 as in the first embodiment. In addition, there is an advantage that the stick piping member 1 and the bucket piping member 2 can be prevented from being damaged by coming into contact with surroundings during work, for example.

The balloon 20 is filled in the boom 103 and the piping members 2 and 3 are supported by the balloon 20, so that the stick piping member 1 and the bucket piping member 2 are mounted in the boom 103. The stick piping member 1 and the bucket piping member 2 can be easily attached, and the stick piping member 1 and the bucket piping member 2 can be securely fixed in the boom 103.

Further, since the channel member is not attached, there is an advantage that the structure can be simplified. In this case, since the balloon 20 needs to be largely expanded, special consideration is required for its strength and the like. In the pipe mounting structure and mounting method in the arm mechanism according to each of the above-described embodiments, the stick driving actuator 106 and the bucket driving actuator 107 are used.
The stick piping member 1 and the bucket piping member 2 for supplying and discharging the hydraulic oil are mounted in the boom 103 as a hollow arm member. Only the bucket piping member 2 that is likely to be damaged by contact with surroundings is boom 10
3 may be attached.

Also, in the pipe mounting structure and the mounting method in the arm mechanism according to each of the above-described embodiments, in the construction machine having the boom 103 and the stick 104 as the arm members, the stick pipe member 1 and the bucket pipe member are provided in the boom 103. 2 is attached, but the invention is not limited to this. For example, when the construction machine is provided with another arm member, a piping member for supplying and discharging hydraulic oil to and from the cylinder type actuator mechanism is provided. Arm members other than the boom 103 (for example, a stick 104)
It may be arranged inside. Further, the construction machine may be provided with two or more arm members, or may be provided with one arm member.

Further, in the pipe mounting structure and the mounting method in the arm mechanism according to each of the above-described embodiments, the expansion member is configured as an elongated balloon, but the expansion member is not limited to this. Any material can be used as long as it expands inside the hollow arm member and can support the pipe, and may be, for example, a foamed member on site.

Further, in the pipe mounting structure and the mounting method in the arm mechanism according to each of the above-described embodiments, the channel member is configured to extend in a belt shape. However, the present invention is not limited to this. The channel member may be divided into a plurality of portions and arranged at intervals. In the above-described first and second embodiments, the channel member is attached to the side plate of the boom 103 in the arm mechanism piping attachment structure and the attachment method according to the first and second embodiments.
The mounting position of the channel member may be inside the boom 103 configured as a hollow arm member, and does not necessarily need to be mounted on the side plate.

[0052]

As described above in detail, according to the pipe mounting structure in the arm mechanism according to the first aspect of the present invention, the pipe member is mounted in the arm member, so that the pipe member is placed around the arm member during work, for example. There is an advantage that it can be prevented from being damaged by contact with the object. Further, since the pipe member is supported by the expansion member filled in the arm member, the pipe member can be easily attached to the arm member, and the pipe member can be securely fixed in the arm member. There is also.

According to the pipe mounting structure in the arm mechanism of the present invention, a guide member having a closed cross section is mounted in the arm member, and a balloon-type inflatable member is filled in the guide member. Since the pipe member is supported in the arm member by supporting the pipe member by the member, the mounting of the pipe member to the arm member can be more easily performed, and the pipe member can be more securely mounted in the arm member. There is an advantage that it can be fixed to.

According to the third aspect of the present invention, the pipe member for supplying and discharging the working oil to and from at least the hydraulic cylinder for driving the working member among the pipe members is hollow. In particular, since it is disposed so as to pass through the inside of the boom, there is an advantage that it is possible to surely protect a piping member that is long in length and is likely to be damaged by coming into contact with surroundings.

According to the fourth aspect of the present invention, since the balloon-type inflatable member is first passed through the arm member in a contracted state, the pipe member and the balloon-type inflatable member can be easily connected to the arm member. While it can be loosely fitted
After the loose fitting, the balloon-type inflatable member is inflated to support the piping member in the arm member, so that the piping member can be easily mounted in the arm member. There is an advantage that it can be fixed securely.

[Brief description of the drawings]

FIG. 1 is a perspective view schematically showing a pipe mounting structure and a mounting method in an arm mechanism according to a first embodiment of the present invention.

FIG. 2 is a sectional view schematically showing a pipe mounting structure and a mounting method in an arm mechanism according to the first embodiment of the present invention.
3A is a cross-sectional view taken along the line AA, and FIG. 3A illustrates a state where the balloon-type inflatable member is contracted, and FIG. 3B illustrates a state where the balloon-type inflatable member is expanded.

FIG. 3 is a perspective view schematically showing a pipe mounting structure and a mounting method in an arm mechanism according to a second embodiment of the present invention.

FIG. 4 is a sectional view schematically showing a pipe mounting structure and a mounting method in an arm mechanism according to a second embodiment of the present invention;
FIG. 4 is a cross-sectional view taken along line BB of FIG. 3.

FIG. 5 is a cross-sectional view schematically illustrating a pipe mounting structure and a mounting method in an arm mechanism according to a third embodiment of the present invention.

FIG. 6 is a schematic side view of a construction machine such as a hydraulic shovel.

FIG. 7 is a perspective view schematically showing a conventional pipe mounting structure in an arm mechanism.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Piping member for sticks 2 Piping member for buckets 3 Channel member (closed section guide part) 3a One end of channel member 3b The other end of channel member 4 Opening 5, 12, 13, 20 Balloon (expansion member, balloon type) Expansion member) 10 Channel member for stick 11 Channel member for bucket 100 Lower traveling body 101 Operation room 102 Upper revolving structure (main body of construction machine) 103 Boom (arm member, arm mechanism) 103A, 103B Pin 103a Upper plate 103b Lower plate 103c , 103d Side plate 103e Front side plate 103f, 103g, 103h Piping opening 104 Stick (arm member, arm mechanism) 104A pin 105 Boom driving hydraulic cylinder (cylinder actuator mechanism) 106 Stick driving hydraulic cylinder (cylinder type 107) Hydraulic cylinder for driving the bucket (cylinder type actuator mechanism) 108 Bucket (working member) 109, 110 Rod 111 Engine room 112 Hydraulic oil tank 113 Fuel tank 114 Main frame 121 Stick piping member 122 Bucket piping member 123 Mounting Element

Claims (4)

[Claims] An arm mechanism having a hollow arm member; and a supply / discharge of hydraulic oil to / from a cylinder-type actuator mechanism for driving the arm mechanism and a working member mounted on the arm mechanism by performing expansion / contraction operations. With a piping member, at least a part of the piping member is disposed so as to pass through the hollow arm member,
The pipe member is mounted in the hollow arm part by the pipe member being supported by an expansion member filled in the hollow arm member. Construction. 2. A balloon-type inflatable member in which a closed cross-section guide portion for loosely fitting and passing the pipe member is provided in the hollow arm member, and the pipe member is filled in the guide portion. The pipe mounting structure in the arm mechanism according to claim 1, wherein the pipe member is mounted in the hollow arm portion by being supported by the arm member. 3. The arm mechanism includes a hollow boom having one end rotatably connected to the construction machine body and a stick having one end rotatably connected to the boom. The cylinder type actuator mechanism is interposed between the construction machine main body and the boom, and rotates the boom with respect to the construction machine main body by expanding and contracting the distance between the ends. A boom drive hydraulic cylinder, a stick drive hydraulic cylinder interposed between the boom and the stick to rotate the stick relative to the boom as the distance between the ends expands and contracts; And a working member drive hydraulic cylinder interposed between the working member and the working member for rotating the working member with respect to the stick by expanding and contracting the distance between the ends. At least a pipe member of the pipe member for the working member driving hydraulic cylinder is disposed so as to pass through the hollow boom, and the pipe member is filled in the hollow boom. The pipe mounting structure in the arm mechanism according to claim 1, wherein the pipe member is mounted in the hollow arm portion by being supported by a balloon-type inflatable member. 4. A method for fixing a piping member for supplying and discharging hydraulic oil to and from a cylinder type actuator mechanism for driving an arm mechanism and a working member by performing an expansion / contraction operation on an arm mechanism having a hollow arm member. A first step of passing at least a part of the pipe members and the balloon-type inflatable member in a contracted state in the hollow arm member in a loosely fitted state; And a second step of inflating the balloon-type inflatable member and supporting the pipe member in the hollow arm member to mount the pipe member in the hollow arm portion. A pipe mounting method in an arm mechanism, characterized in that: