JPH08311925A - Pipe fixing / protection device - Google Patents

Abstract

(57) [Summary] [Purpose] The size of the device is reduced to easily secure a mounting space, and the number of parts is greatly reduced. [Structure] Each screw seat 32 is arranged on the boom 9, and each greasing pipe 33 is sandwiched between an upper sandwiching body 36 and a lower sandwiching body 37 of each clamp 35. On the boom 9. In addition, the cover 38, which is formed by the upper plate portion 38A and the side plate portions 38B and has a substantially U-shaped cross section, is arranged so as to cover the greasing pipes 33 from above, and the end faces of the side plate portions 38B are boomed. Abut on top of 9.
Then, attach each bolt 34 to each screw hole 32A of each screw seat 32.
By screwing each bolt 34 to the cover 38 and fixing each greasing pipe 33 with each clamp 35, and positioning between each screw seat 32 and the cover 38. , A pipe fixing / protecting device 31 having a width W1 and a height H1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipe fixing / protecting device suitable for use in, for example, pipes installed in construction machines such as hydraulic excavators.

[0002]

2. Description of the Related Art A hydraulic excavator will be described as an example of a conventional construction machine with reference to FIGS.

In the figure, 1 is a lower traveling body, 2 is a lower traveling body 1.
The upper revolving superstructure mounted rotatably above is shown, and the upper revolving superstructure 2 constitutes a working machine main body, and an operating lever (not shown)
A machine room 2 in which an operator's cab 2A, etc., in which an engine, a radiator, a hydraulic pump (all not shown), etc. are installed
B and a counter weight 2C are provided.

Reference numeral 3 denotes a working device provided on the front part of the upper revolving structure 2 so as to be able to move up and down. The working device 3 is roughly composed of a boom 9, an arm 4 and a bucket 5 as a working tool which will be described later. . The boom 9 of the working device 3 has its base end side pin-connected to the frame (not shown) of the upper swing body 2, the arm 4 has its base end side on the tip side of the boom 9, and the bucket 5 has its end side on the arm 4. Are pin-coupled to each.

Between the frame of the upper swing body 2 and the boom 9, boom cylinders 6 and 6 (only one is shown) for raising and lowering the boom 9 are provided by pin connection, and the boom 9 and the arm are provided. An arm cylinder 7 for raising and lowering the arm 4 is pin-connected between the arm 4 and the arm 4. Further, a bucket cylinder 8 for rotating the bucket 5 is provided between the arm 4 and the bucket 5 by pin connection, and a greasing pipe 10 described later is provided at each of these pin connection parts.
The greasing piping such as is connected.

Each of the cylinders 6, 7, and 8 constitutes a hydraulic cylinder, and each of the cylinders 6, 7, and 8 has a rod-side oil chamber and a bottom-side oil chamber (neither shown). Is connected to multiple hydraulic pipes (not shown),
By supplying / discharging the pressure oil from the hydraulic pump to / from the rod-side oil chamber and the bottom-side oil chamber via the respective hydraulic pipes, the rods 6A, 7A, 8A are expanded / contracted, whereby the working device 3 operates. Is activated.

Reference numeral 9 denotes a boom that serves as a support table that constitutes a part of the working device 3, and the boom 9 is formed in a vertically long rectangular tube shape, and is provided with greasing pipes 10 and the like on its upper side surface. A plurality of pipes such as the hydraulic pipes (not shown) are provided in the longitudinal direction along with a pipe fixing / protecting device 11 described later.

Reference numerals 10 and 10 denote left and right greasing pipes as pipes arranged on the upper side surface of the boom 9 via respective screw seats 12 which will be described later. And FIG.
As shown in FIG. 5, the thin tubular shape is formed from metal or the like, and the upper side surface of the boom 9 extends parallel to each other along the length direction. Further, each of the greasing pipes 10 has a base end side connected to an external grease tank or the like via a grease pump (not shown), and a tip end side connected to, for example, the boom cylinders 6 (rods 6A) and the boom 9 respectively. The grease from the grease tank is supplied to each pin coupling part through each greasing pipe 10 so that each pin coupling part is maintained in a lubricated state.

Reference numeral 11 denotes a pipe fixing / protecting device provided on the upper side surface of the boom 9, and the pipe fixing / protecting device 11 is provided.
Are fixed to the upper surface of the boom 9 by welding or the like (only two pieces are shown), the greasing pipes 10, and the greasing pipes 10 on the screw seats 12. The clamp 14 to be fixed, the cover 20 to cover the greasing pipes 10 from above, and the screw holes 12A of the screw seats 12 are screwed together to position the clamps 14 on the upper surface of the boom 9. It is roughly composed of a bolt 13 as a fixing bolt. And the pipe fixing / protecting device 1
1 is formed with a width dimension W and a height dimension H as shown in FIG.

Here, the screw seats 12 are formed with a width dimension W from a rectangular plate material, and are arranged in parallel along the length direction of the boom 9 while being separated from each other. Each screw seat 12 is provided with a screw hole 12A into which a bolt 13 is screwed in its central portion, and two screw holes 12B and 12B into which both bolts 21 described later are screwed, on both left and right sides thereof. The greasing pipes 10, the clamps 14, the cover 20, and the like are supported together with the boom 9.

.. indicate a plurality of clamps (only two are shown) provided on each screw seat 12, and each of the clamps 14 has a left greasing pipe 10 as shown in FIG.
A pair of upper sandwiching bodies 1 for sandwiching each from above and below
5, a lower sandwiching body 16 and a pair of upper sandwiching bodies 15 and a lower sandwiching body 16 for sandwiching the greasing pipe 10 on the right side from above and below.
A holding plate 17 that is provided so as to cover the holding bodies 15 and 16 from above and is formed from a plate material such as metal in a substantially U-shaped cross section; and a cylindrical shape that is provided on the outer peripheral side of the bolt 13. It is generally composed of a spacer 18.

Here, each holding body 15 and each holding body 16 is
Each of them is formed of an elastic body such as rubber into a rectangular plate shape having a substantially rectangular shape.
Groove portion 15A having a substantially arc-shaped cross section so as to fit with the outer peripheral surface of
15A, 16A and 16A are respectively provided in a recess. Then, each holding body 15 is fixed to the upper side surface of the screw seat 12, and each holding body 16 is fixed to the inner side surface of the holding plate 17.

Further, a bolt 13 is provided at the center of the pressing plate 17.
Is formed with a bolt insertion hole 17A through which the bolt 1 is inserted.
By fastening 3 to the restraining plate 17, the respective greasing pipes 10 are formed by the biasing force from the restraining plate 17 generated at this time so as to form the groove portions 15A of the sandwiching body 15 and the groove portions 16A of the sandwiching body 16. Between the screw seat 12 and the pressing plate 17, and the positioning is performed between the screw seat 12 and the pressing plate 17.

Further, a spacer 18 is provided between the screw seat 12 and the pressing plate 17 in order to prevent the urging force from the pressing plate 17 from exceeding a certain level, and the bolt 13 is provided. Bolt head 13A and restraint plate 17
A spring washer 19 is provided between and to prevent the bolt 13 from loosening.

Reference numeral 20 denotes a cover (2) extending in the length direction of the boom 9 and provided on each screw seat 12 via each bolt 21.
(Only one is shown), and the cover 20 is as shown in FIG.
A cover portion 20A having a substantially U-shaped cross section extending from the base end side (the upper swing body 2 side) of the boom 9 toward the front end side, and the cover portion 20A are integrally provided outward from the left and right sides, respectively. It is formed with the width dimension W from the flange portions 20B and 20B.

Here, the cover portion 20A of the cover 20
Is each clamp 14 and each greasing pipe 10 located between them.
The flange portions 20B are arranged so as to cover the above portion from above, and the bolts 21 and 21 are inserted into the screw holes 12B of the screw seat 12 through the bolt insertion holes 20B1 and 20B1 of the flange portions 20B. It is attached integrally to the screw seat 12 by screwing. Also, the bolt heads 21A, 21A of each bolt 21 and each flange portion 2 of the cover 20.
Spring washers 22, 22 are provided between 0B and 0B to prevent the bolts 21 from loosening. Then, the cover 20 is provided in the cover portion 20A with each greasing pipe 1
0 and each clamp 14 are housed to prevent them from being damaged or broken by rocks from the outside.

In the conventional hydraulic excavator constructed as described above, when excavating earth and sand or the like, pressure oil is supplied from the hydraulic pump to the boom cylinder 6, the arm cylinder 7 and the bucket cylinder 8 through the hydraulic pipes. By supplying / discharging and expanding / contracting the respective rods 6A, 7A, 8A, the bucket 5 is rotated while the boom 9 and the arm 4 are lifted, and excavation work of earth and sand or the like is performed. .

Further, the grease from the grease tank is connected to the boom 9 and the rods 6A (the boom cylinders 6) through the greasing pipes 10 and the like, or the pin connecting portion or the rod 7A.
It is supplied to the pin connecting portions between the (arm cylinder 7) and the arm 4, etc., and these pin connecting portions are kept in a lubricated state so that the working device 3 can be operated smoothly.

At the time of the excavation work, the work device 3 directly excavates the earth and sand with the bucket 5 on the tip side, so that, for example, the greasing pipes 10 and the like arranged on the boom 9 are earth and sand, rocks, and the like. It becomes easy to receive the impact from the obstacle. Therefore, each greasing pipe 10 is protected from these obstacles by the pipe fixing / protecting device 11, and each greasing pipe 1 of the boom 9 is protected.
0 is prevented from being damaged or broken.

[0020]

By the way, in the above-mentioned conventional technique, the pipe fixing / protecting device 11 is provided in each greasing pipe 10.
Since the cover 20 is further attached to the screw seat 12 from the upper side of each clamp 14 fixing the
Both the width dimension W and the height dimension H of the pipe fixing / protecting device 11 are large, which leads to an increase in size of the device.

As a result, when the pipe fixing / protecting device 11 is attached to each greasing pipe 10, a plurality of pipes such as the hydraulic pipes are provided on the upper surface of the boom 9 in addition to each greasing pipe 10. Since the other pipes are provided as an obstacle, the mounting space is narrowed, a large amount of time is spent on disassembly and assembly work, and workability deteriorates.

Further, in the pipe fixing / protecting device 11, it is necessary to provide members such as the pressing plate 17 and the spacer 18 in order to form the clamp 14, and the structure becomes complicated, the number of parts increases, and the cost becomes high. There is a problem.

Further, the cover 20 is merely attached to each screw seat 12 through each bolt 21, and therefore,
There is a problem that the rigidity of the cover 20 is weakened and the cover 20 cannot always sufficiently protect the greasing pipes 10, the clamps 14 and the like against external impacts.

The present invention has been made in view of the above-mentioned problems of the prior art. The present invention makes it possible to easily secure a mounting space by reducing the size of the apparatus and to greatly reduce the number of parts, and to disassemble and assemble the apparatus. It is an object of the present invention to provide a pipe fixing / protecting device capable of significantly improving the workability at the time.

[0025]

In order to solve the above-mentioned problems, the invention according to claim 1 provides a plurality of screw seats arranged at intervals on a support base, and the screw seats via the screw seats. Pipes arranged on a support, a plurality of clamps for fixing the pipes on the screw seats, and extending in the length direction of the pipes at least between the screw seats through the clamps. A cover for covering the pipe from the upper side and a plurality of fixing bolts for fixing the cover on the support base by being screwed into the screw seats are provided, and the fixing bolts include the cover and the screw seats. A structure in which piping is positioned between the clamps is adopted.

In this case, as in the second aspect of the invention, the cover is formed in a U-shaped cross section from the upper plate portion extending in the length direction of the pipe and the left and right side plate portions, and each side plate portion is formed. It is preferable that the lower end side of each of the screw seats contacts the support base on both the left and right sides of the screw seat, and the upper plate part contacts the upper surface side of the clamp.

[0027]

With the above construction, in the invention described in claim 1,
By screwing the fixing bolt into the screw seat, the cover can be pressed against each clamp side to tighten the clamps, which allows the pipe to be positioned on the screw seat and the cover to protect the pipe securely. it can.

In this case, as in the invention described in claim 2, the cover is formed in a U-shaped cross section from the upper plate portion extending in the length direction of the pipe and the left and right side plate portions, and each side plate is formed. The lower end side of the portion abuts on the support base on both the left and right sides of the screw seats, and the upper plate portion abuts on the upper surface side of the clamp, whereby the upper plate portion is clamped. It can be pressed to the side, and the left and right side plate portions can prevent the pressing force to the pipe from exceeding a certain level.

[0029]

Embodiments of the present invention will be described below with reference to FIGS. In the embodiment, the same components as those of the conventional technique shown in FIGS. 3 to 5 are designated by the same reference numerals, and the description thereof will be omitted.

In the figure, 31 indicates a pipe fixing / protecting device which is arranged on the upper surface of the boom 9 along with each greasing pipe 10.
Although the pipe fixing / protecting device 31 has substantially the same structure as the pipe fixing / protecting device 11 described in the prior art, the pipe fixing / protecting device 31 is fixed to the upper surface of the boom 9 by welding or the like. The left and right greasing pipes 3 which are formed in the same manner as the screw seats 32 and the greasing pipe 10 described in the related art and are arranged on the boom 9 via the screw seats 32.
3, 33, a later-described clamp 35 for fixing each greasing pipe 33 on each screw seat 32, a below-mentioned cover 38 for covering the clamp 35 from above each greasing pipe 33, and each screw. By being screwed into the screw hole 32A of the seat 32, the clamp 35 is roughly composed of bolts 34, 34, ... (Only two are shown) as fixing bolts for positioning the clamp 35 between the boom 9 and the cover 38. There is. The pipe fixing / protecting device 31 is formed with a width W1 and a height H1 as shown in FIG.

Here, although the screw seats 32 have substantially the same structure as the screw seats 12 described in the prior art, the width dimension thereof is smaller than the width dimension W of the screw seats 12. The central portion is provided with screw holes 32A, 32A, ... (Only one is shown) into which the respective bolts 34 are screwed.

Reference numerals 35, 35, ... Show a plurality of clamps (only two are shown) provided on each screw seat 32, and each of the clamps 35 is constructed in substantially the same manner as each of the clamps 14 described in the prior art. However, as shown in FIG. 2, each of the clamps 35 has a pair of upper and lower clamps 36 and 37 for clamping the left greasing pipe 33 from above and below, and the right greasing pipe 33 above. , A pair of upper and lower clamping members 36 and 37 which are clamped from below.

Here, each sandwiching body 36 is formed in the same manner as each sandwiching body 15 and 16 described in the prior art, and groove portions 36A and 36A, into which the greasing pipes 33 are fitted, are recessed in the central portion.
Similarly, groove portions 37A, 37A are provided in the sandwiching body 37 in a recessed manner. Then, each holding body 36 is fixed or abutted on the inner surface of the upper plate portion 38A of the cover 38, and each holding body 37 is fixed or abutted on the screw seat 32, respectively.

Reference numeral 38 denotes a cover which extends in the lengthwise direction of the boom 9 and is provided on the screw seat 32 via the respective bolts 34. The cover 38 extends slenderly from the base end side to the tip end side of the boom 9. Then, the flat plate-shaped upper plate portion 38A formed with the width dimension W1 (W1 <W), and the left side of the upper plate portion 38A,
The lower end surface is bent downward from both right sides, and the lower end surface is formed into a substantially U-shaped cross section from side plate portions 38B and 38B that abut on the upper side surface of the boom 9.

Here, each bolt insertion hole 3 through which each bolt 34 is inserted is provided in the central portion of the upper plate portion 38A of the cover 38.
When 8A1 is drilled and the bolt 34 is fastened to the upper plate portion 38A, the greasing pipes 33 are connected to the groove portions 36A of the holding body 36 and the holding body 37 by the pressing force from the upper plate portion 38A. It is sandwiched from above and below with each groove 37A, and each greasing pipe 33 is positioned between the screw seat 32 and the cover 38.

The cover 38 is internally provided with each greasing pipe 3
3 are stored to prevent the greasing pipes 33 from being damaged or damaged by obstacles from the outside.

A spring washer 39 is provided between the bolt head 34A of the bolt 34 and the upper plate portion 38A of the cover 38 to prevent the bolt 34 from being loosened.

The pipe fixing / protecting device 31 according to the present embodiment has the above-mentioned structure, and its basic operation is not different from that of the prior art.

However, in this embodiment, the screw seats 32 are arranged on the boom 9 and the upper holding members 36 of the clamps 35 are arranged.
By sandwiching each greasing pipe 33 between the lower holding body 37 and the lower holding body 37, each greasing pipe 33 is arranged on the boom 9, and each cover 38 formed in a U-shaped cross section is provided. Since each bolt 34 is screwed into each screw hole 32A of each screw seat 32 so as to cover the oil pipe 33 from above, and each bolt 34 is fastened to the cover 38, each grease pipe 33
Can be fixedly positioned between each screw seat 32 and the cover 38 via each clamp 35, and the lower end surface of each side plate portion 38B of the cover 38 can be brought into direct contact with the upper side surface of the boom 9. Therefore, the following operational effects can be obtained.

That is, the pipe fixing / protecting device 31 has a width W.
It can be formed with 1 (W1 <W) and height dimension H1 (H1 <H) to reduce the size as a whole, and the pipe fixing / protecting device 31 is attached to each greasing pipe 33 of the boom 9. At times, even if a plurality of pipes such as hydraulic pipes are arranged on the boom 9, a sufficient mounting space can be secured, and the pipe fixing / protecting device 31 can be easily attached to each greasing pipe 33. The workability at the time of disassembling and assembling can be greatly improved.

Further, since each greasing pipe 33 is fixed by each clamp 35 by directly applying a pressing force from the upper plate portion 38A of the cover 38 to each clamp 35, the respective clamps 35 and the cover 38 are fixed. It is not necessary to provide separate members such as the pressing plate 17 and the bolts 21 shown in the related art between them. Further, since each side plate portion 38B of the cover 38 is brought into contact with the upper side surface of the boom 9, each screw seat 32
Between the cover and the cover 38, the spacer 1 shown in the prior art is used.
Since it is not necessary to provide another member such as 8, the number of parts can be effectively reduced, and the cost can be significantly reduced.

Further, since the pressing force from each screw seat 32, each sandwiching body 36, 37 (each clamp 35) and each bolt 34 always acts on the cover 38, the rigidity of the cover 38 can be improved by this. , The strength of the cover 38 can be increased, and the greasing pipes 33 accommodated in the cover 38 can be sufficiently protected against an external impact, and the greasing pipes 33 are damaged. It can be surely prevented from being damaged.

In the above embodiment, the pipe fixing / protecting device 31 is provided in each greasing pipe 33, but the present invention is not limited to this, and for example, the boom 9 and the arm 4 can be provided.
It may be provided in a pipe in addition to the hydraulic pipe arranged in the above.

Further, in the above-mentioned embodiment, the cover 38 is described as being formed from the upper plate portion 38A and the side plate portions 38B to have a substantially U-shaped cross section. However, instead of this, for example, a substantially U-shaped cross section or A cover formed in a semicircular shape or the like may be used.

Furthermore, in the above-mentioned embodiment, the pipe fixing /
Although the protection device 31 has been described as being applied to the pipe installed in the hydraulic excavator, the present invention is not limited to this, and is applied to the pipe installed in other construction machines such as a hydraulic crane and a wheel loader. It may also be widely applied to vehicles such as trucks and private cars, as well as piping arranged in factories, buildings and the like.

[0046]

As described in detail above, according to the present invention, as described in claim 1, the pipe is arranged on the support base via each screw seat and extends in the longitudinal direction of the pipe. In addition, a cover is provided to cover the pipe from above, and each fixing bolt is screwed into the screw seat to fix the pipe on the support base via the clamp, and the positioning between the screw seat and the cover is performed. By doing so, the entire device can be formed compactly, and even if the mounting space is narrow, the mounting space can be easily secured and disassembled,
Workability at the time of assembling can be greatly improved.

Further, it is not necessary to provide a separate member such as a holding plate between the clamp and the cover as in the prior art, which allows the number of parts to be greatly reduced and the workability at the time of maintenance to be improved. Can be improved.

Further, in the invention described in claim 2, it is not necessary to provide a separate member such as a spacer between the upper plate portion of the cover and the screw seat, whereby the number of parts can be effectively reduced, The cost can be significantly reduced, the rigidity of the cover can be improved, and the strength of the cover can be effectively increased. Further, the pipe accommodated in the cover can be sufficiently protected from an external impact by the cover, and the pipe can be surely prevented from being damaged or damaged.

[Brief description of drawings]

FIG. 1 is a partially cutaway plan view showing a pipe fixing / protecting device provided on a boom of a hydraulic excavator according to an embodiment of the present invention.

FIG. 2 is an enlarged sectional view taken in the direction of arrows II-II in FIG.

FIG. 3 is an overall view showing a hydraulic excavator according to a conventional technique.

FIG. 4 is a partially cutaway plan view showing a pipe fixing / protecting device provided on the boom in FIG. 3 in an enlarged manner.

5 is an enlarged cross-sectional view taken along the arrow VV in FIG.

[Explanation of symbols]

 9 Boom (support base) 31 Pipe fixing / protecting device 32 Screw seat 32A Screw hole 33 Greasing pipe (piping) 34 Bolt (fixing bolt) 35 Clamp 36, 37 Clamping body 38 Cover 38A Upper plate part 38B Side plate part

Claims (2)

[Claims] 1. A plurality of screw seats arranged at intervals on a support, pipes arranged on the support via the screw seats, and the pipes fixed on the screw seats. A plurality of clamps, a cover extending at least between the screw seats in the length direction of the pipe and covering the pipe from above via the clamps, and the cover by being screwed into the screw seats. And a plurality of fixing bolts for fixing the pipe on the support base, each fixing bolt positioning the pipe between the cover and each screw seat through each clamp. 2. The cover is formed in a U-shaped cross section from an upper plate portion extending in the length direction of the pipe and left and right side plate portions, and the lower end side of each side plate portion is the left side of each screw seat. 2. The pipe fixing / protecting device according to claim 1, wherein the right and left sides are in contact with the support base, and the upper plate part is in contact with the upper surface side of the clamp.