Construction machinery

Abstract

To hold a plurality of cables using a guard bar and to prevent the plurality of cables from rubbing against each other.SOLUTION: A protective pipe 25 is attached to a guard bar 19 provided on a right side face window 15A of a cab 11. The protective pipe 25 consists of a pipe body extending along the guard bar 19, and has: a guard bar attaching hole 25A penetrating the protective pipe 25 in a length direction; and a plurality of cable housing holes 25B, 25C, 25D arranged around the guard bar attaching hole 25A and penetrating the protective pipe 25 in the length direction. The protective pipe 25 stores a plurality of cables 22, 23, 24 connected to additional monitor devices 20, 21 arranged in the cab 11 in the cable housing holes 25B, 25C, 25D individually, with the guard bar 19 inserted into the guard bar attaching hole 25A.SELECTED DRAWING: Figure 3

Description

Technical Field

[0005] ,

[0004] , ,

[0001] The present disclosure relates to construction machines such as hydraulic excavators and hydraulic cranes, for example.

Background Art

[0002] Generally, the body of a hydraulic excavator, which is representative of construction machines, is composed of a self-propelled lower traveling body and an upper revolving body that is rotatably mounted on the lower traveling body. A working device is provided on the front side of the upper revolving body, and earthwork and the like are performed using this working device. A cab forming a driver's cab is provided on the left front side of the upper revolving body, and an operator operates the hydraulic excavator in the cab.

[0003] The cab of a hydraulic excavator is formed in a box shape surrounded by a front panel, a rear panel, a left side panel, a right side panel, and an upper panel, and a door for boarding and alighting is provided on the left side panel. Further, windows that open to the outside are provided on the front panel, the rear panel, the left side panel, the right side panel, etc., and window glass is attached to these front window, rear window, left side window, and right side window. Here, since the right side panel of the cab is adjacent to the working device, a plurality of guard bars that partition between the driver's cab and the outside and extend in the front-rear direction are provided on the right side window, preventing the operator from leaning out of the right side window to the outside. <00000f13>

[0004] In recent years, various optional devices (electrical components) such as additional monitors are often mounted in the cab, and the added electrical components are often attached to the guard bars. For example, when an additional monitor is arranged in front of the driver's seat using the guard bar and a controller connected to the additional monitor is arranged behind the driver's seat, a cable (electric wire) connecting between the additional monitor and the controller is usually attached to the guard bar using a bundling band or the like. For this reason, the cable and the bundling band are directly visible inside the cab, not only impairing the aesthetics inside the cab, but also having a problem that the cable may be disconnected if the operator accidentally catches a part of the cable.

[0005] In response to this, a wire harness has been proposed in which multiple electric wires are bundled together and housed inside a hollow pipe. With this wire harness, contact with the electric wires can be avoided by the pipe, and an aesthetic appearance can be maintained (Patent Document 1). [Prior art documents] [Patent Documents]

[0006] [Patent Document 1] Japanese Patent Publication No. 2013-165561 [Overview of the project] [Problems that the invention aims to solve]

[0007] However, construction machinery such as hydraulic excavators generate significant vibrations during operation. Therefore, when multiple electric wires are bundled together and stored inside a pipe, as in Patent Document 1, the wires inside the pipe rub against each other due to vibrations. This results in problems such as cable damage and short circuits between cables.

[0008] The object of the present invention is to provide a construction machine that can hold multiple cables using a guard bar and prevent damage to the multiple cables from rubbing against each other. [Means for solving the problem]

[0009] The present invention relates to a construction machine comprising a self-propelled vehicle body and a cab provided on the vehicle body, having a driver's compartment inside and a window opening to the outside, wherein a guard bar extending in the longitudinal direction of the vehicle body is provided on the driver's compartment side of the window, and further comprises a protective pipe made of a pipe body extending along the guard bar, having a guard bar mounting hole penetrating the length of the pipe body and a plurality of cable storage holes arranged around the guard bar mounting hole and penetrating the length of the pipe body, wherein the protective pipe is configured to individually store cables connected to electrical equipment located inside the cab in the plurality of cable storage holes when the guard bar is inserted into the guard bar mounting hole. [Effects of the Invention]

[0010] According to the present invention, with the cab's guard bar inserted into the guard bar mounting hole of the protective pipe, cables can be individually stored in each of the multiple cable storage holes of the protective pipe. This prevents damage caused by multiple cables rubbing against each other, and also improves the aesthetic appearance by storing multiple cables inside the protective pipe. [Brief explanation of the drawing]

[0011] [Figure 1] This is a left side view showing a hydraulic excavator according to an embodiment of the present invention. [Figure 2] This is an enlarged view of the cab and its interior, partially cut away from the image in Figure 1. [Figure 3] This is a perspective view showing a protective pipe, guard bar, and cable according to the first embodiment. [Figure 4] This is a perspective view showing the guard bar with the protective pipe attached. [Figure 5] This is a cross-sectional view of the guard bar and protective pipe as seen from the direction of arrow VV in Figure 4. [Figure 6] This is a cross-sectional view showing the protective pipe in its deployed position, along with the guard bar. [Figure 7]This is a cross-sectional view showing a state in which multiple cables are stored in a protective pipe attached to a guard bar. [Figure 8] This is a cross-sectional view showing a state in which multiple cables are housed in a bundled position with the protective pipe. [Figure 9] This is a cross-sectional view showing the protective pipe according to the second embodiment in a converged position. [Figure 10] This is a cross-sectional view showing the protective pipe according to the second embodiment in the deployed position. [Modes for carrying out the invention]

[0012] Hereinafter, embodiments of the construction machinery according to the present invention will be described in detail with reference to Figures 1 to 10, using the application of a hydraulic excavator as an example. In these embodiments, the direction of travel of the hydraulic excavator will be described as the front-rear direction, and the direction perpendicular to the direction of travel will be described as the left-right direction.

[0013] Figures 1 to 8 show a first embodiment of the present invention. In Figure 1, the body of the hydraulic excavator 1 is composed of a self-propelled crawler-type lower vehicle 2 and an upper slewing vehicle 3 that is rotatably mounted on the lower vehicle 2. A working device 4, consisting of a boom 4A, an arm 4B, a bucket 4C, etc., is provided on the front side of the upper slewing vehicle 3. The hydraulic excavator 1 travels around the work site on the lower vehicle 2 and performs excavation work such as soil digging using the working device 4 while rotating the upper slewing vehicle 3.

[0014] The upper slewing body 3 consists of a base slewing frame 5, a cab 11 (described later) mounted on the left front side of the slewing frame 5, a counterweight 6 provided at the rear end of the slewing frame 5, and an exterior cover 7 provided in front of the counterweight 6. The counterweight 6 maintains weight balance with the work device 4 provided on the front side of the slewing frame 5. The exterior cover 7 covers the mounted equipment (none of which are shown) such as the prime mover, hydraulic pump, and control valve mounted on the slewing frame 5.

[0015] The cab 11 is mounted on the left front side of the swivel frame 5. The cab 11 is formed as a box body surrounded by a front panel 12, a rear panel 13, a left side panel 14, a right side panel 15, and an upper panel 16, and a driver's cab 17 is formed inside the cab 11. The front panel 12 and the rear panel 13 face each other in the front-rear direction, the left side panel 14 and the right side panel 15 face each other in the left-right direction, and the upper panel 16 closes the upper end sides of the front panel 12, the rear panel 13, the left side panel 14, and the right side panel 15.

[0016] The front panel 12 is provided with a front window that opens to the outside from the driver's cab 17 and a front window glass (both not shown) attached to this front window. The rear panel 13 is provided with a rear window that opens to the outside from the driver's cab 17 and a rear window glass (both not shown) attached to this rear window.

[0017] On the front side of the middle part in the front-rear direction of the left side panel 14, an entrance / exit opening 14A for the operator to enter and exit the cab 11 is formed, and an entrance / exit door 14B is attached to this entrance / exit opening 14A so as to be openable and closable. Also, on the rear side of the middle part in the front-rear direction of the left side panel 14, a left side window 14C that opens to the outside from the driver's cab 17 is provided, and a left window glass 14D is attached to this left side window 14C. The right side panel 15 is provided with a right side window 15A that opens to the outside from the driver's cab 17 and a right window glass 15B attached to this right side window 15A. Thus, the cab 11 has a driver's cab 17 formed inside and a plurality of windows (front window, rear window, left side window 14C, right side window 15A) that open to the outside.

[0018] In the cab 11, a driver's cab 17 is arranged, and a driver's seat 18 is disposed therein. In front of the driver's seat 18, a traveling lever and pedal device (not shown) is provided, and on both the left and right sides of the driver's seat 18, an operation lever device, a monitor device, various operation switches, and instruments (none of which are shown) are provided. Further, additional monitor devices 20 and 21, which will be described later, are arranged at the right front side of the driver's seat 18. The operator sitting on the driver's seat 18 controls the traveling operation of the hydraulic excavator 1 (lower traveling body 2) by operating the traveling lever and pedal device, and controls the turning operation of the upper revolving body 3 and the operation of the working device 4 by operating the operation lever device.

[0019] Next, the two guard bars 19 provided on the right side window 15A of the right side panel 15 will be described. The two guard bars 19 are located on the side of the driver's cab 17 rather than the right window glass 15B and are attached to the right side window 15A, and extend in the front-rear direction of the upper revolving body 3 while maintaining a certain interval in the vertical direction. The guard bar 19 is formed using a pipe body having a circular cross-section with excellent rigidity, and attachment eyes 19A are provided at both ends in the length direction.

[0020] The attachment eyes 19A of the guard bar 19 are attached to the peripheral edge of the right side window 15A using bolts or the like, and the two guard bars 19 extend linearly from the front edge to the rear edge of the right side window 15A. Thereby, the two guard bars 19 partition between the driver's cab 17 and the outside, and prevent the operator from leaning out of the right side window 15A to the outside with the right window glass 15B open state. Note that one or three or more guard bars 19 may be provided.

[0021] The additional monitoring devices 20 and 21, as electrical components, are located inside the cab 11 on the right front side of the driver's seat 18. Additional monitoring device 20 is attached to the guard bar 19 via bracket 20A, and additional monitoring device 21 is attached to the guard bar 19 via bracket 21A. The additional monitoring devices 20 and 21 are connected to a controller (not shown), for example, located behind the driver's seat 18, via multiple (e.g., three) cables (wires) 22, 23, and 24. These three cables 22, 23, and 24 are housed in a protective pipe 25, which will be described later.

[0022] Next, the protective pipe 25 used in this embodiment will be described.

[0023] The protective pipe 25 is detachably attached to one (the lower) of the two guard bars 19. The protective pipe 25 consists of a pipe body that extends along the guard bar 19 and houses the three cables 22, 23, and 24 inside when attached to the guard bar 19.

[0024] As shown in Figures 3 to 6, the protective pipe 25 is composed of multiple (e.g., three) protective pipe pieces, specifically a first protective pipe piece 26, a second protective pipe piece 27, and a third protective pipe piece 28, all having the same length. The pipe bodies, which are protective pipes 25, are connected to each other in the longitudinal direction of the protective pipes 25. First protective pipe piece 26, second protective pipe piece 27, third protective pipe piece 28 It is composed of and is divided into a first protective pipe piece 26, a second protective pipe piece 27, and a third protective pipe piece 28 parallel to each other in the longitudinal direction of the protective pipe 25 in a plane along the longitudinal direction of the protective pipe 25. The first protective pipe piece 26, the second protective pipe piece 27, and the third protective pipe piece 28 which are connected to each other in the longitudinal direction of the protective pipe 25 are They are integrally molded using an elastic resin material. Specifically, the first protective pipe piece 26 and the second protective pipe piece 27 are integrated (connected) via a connecting portion 29, and the second protective pipe piece 27 and the third protective pipe piece 28 are integrated (connected) via a connecting portion 30.

[0025] The protective pipe 25, composed of the first protective pipe piece 26, the second protective pipe piece 27, and the third protective pipe piece 28, can be displaced between a converged position, where it converges in a circular cross-section as shown in Figure 5, and an unfolded position, where it unfolds so that it separates from each other as shown in Figure 6. When the first protective pipe piece 26, the second protective pipe piece 27, and the third protective pipe piece 28 are in the converged position, a guard bar mounting hole 25A with a circular cross-section is formed in the center of the protective pipe 25, penetrating in the longitudinal direction of the protective pipe 25. Around the guard bar mounting hole 25A, three cable storage holes 25B, 25C, and 25D with a circular cross-section are formed, penetrating in the longitudinal direction of the protective pipe 25, at 90-degree angles from each other. A guard bar 19 is detachably inserted into the guard bar mounting hole 25A of the protective pipe 25. Only cable 22 is stored in the cable storage hole 25B of the protective pipe 25, only cable 23 is stored in the cable storage hole 25C, and only cable 24 is stored in the cable storage hole 25D.

[0026] The first protective pipe piece 26 is formed as a rod-shaped body having a semicircular cross-sectional shape. The first protective pipe piece 26 has a rectangular dividing surface 26A that extends in the longitudinal direction of the protective pipe 25, and a recessed groove 26B for mounting holes is formed in the center of the width direction perpendicular to the longitudinal direction of the dividing surface 26A. The recessed groove 26B for mounting holes has a semicircular cross-sectional shape corresponding to the guard bar mounting hole 25A of the protective pipe 25, and is formed along the entire length of the first protective pipe piece 26 with the dividing surface 26A side open.

[0027] Furthermore, the divided surface 26A of the first protective pipe piece 26 is provided with two recessed grooves 26C and 26D for storage holes, flanking the recessed groove 26B for the mounting hole. The recessed groove 26C for storage holes consists of a semicircular groove in cross-section corresponding to the cable storage hole 25B of the protective pipe 25, and is formed along the entire length of the first protective pipe piece 26 with the divided surface 26A side open. The recessed groove 26D for storage holes consists of a semicircular groove in cross-section corresponding to the cable storage hole 25D of the protective pipe 25, and is formed along the entire length of the first protective pipe piece 26 with the divided surface 26A side open.

[0028] The second protective pipe piece 27 is connected to the first protective pipe piece 26 via a connecting portion 29. The second protective pipe piece 27 is formed as a rod-shaped body having a quarter-circular (sector-shaped) cross-section. The second protective pipe piece 27 has a rectangular first dividing surface 27A facing the dividing surface 26A of the first protective pipe piece 26, and a rectangular second dividing surface 27B perpendicular to the first dividing surface 27A. A recessed groove 27C for mounting holes is formed at the corner where the first dividing surface 27A and the second dividing surface 27B intersect. The recessed groove 27C for mounting holes has a quarter-circular cross-section corresponding to the guard bar mounting hole 25A of the protective pipe 25, and is formed along the entire length of the second protective pipe piece 27.

[0029] A recessed groove 27D for a storage hole is provided on the first dividing surface 27A of the second protective pipe piece 27. The recessed groove 27D for a storage hole consists of a groove with a semicircular cross-sectional shape corresponding to the cable storage hole 25B of the protective pipe 25, and is formed along the entire length of the second protective pipe piece 27 with the first dividing surface 27A side open. A recessed groove 27E for a storage hole is provided on the second dividing surface 27B of the second protective pipe piece 27. The recessed groove 27E for a storage hole consists of a groove with a semicircular cross-sectional shape corresponding to the cable storage hole 25C of the protective pipe 25, and is formed along the entire length of the second protective pipe piece 27 with the second dividing surface 27B side open.

[0030] The third protective pipe piece 28 is connected to the second protective pipe piece 27 via a connecting portion 30. The third protective pipe piece 28 is formed as a rod-shaped body having a quarter-circular (sector-shaped) cross-section. The third protective pipe piece 28 has a rectangular first dividing surface 28A facing the dividing surface 26A of the first protective pipe piece 26, and a rectangular second dividing surface 28B perpendicular to the first dividing surface 28A and facing the second dividing surface 27B of the second protective pipe piece 27. A recessed groove 28C for mounting holes is formed at the corner where the first dividing surface 28A and the second dividing surface 28B intersect. The recessed groove 28C for mounting holes has a quarter-circular cross-section corresponding to the guard bar mounting hole 25A of the protective pipe 25, and is formed along the entire length of the third protective pipe piece 28.

[0031] A recessed groove 28D for a storage hole is provided on the first dividing surface 28A of the third protective pipe piece 28. The recessed groove 28D for a storage hole consists of a groove with a semicircular cross-sectional shape corresponding to the cable storage hole 25D of the protective pipe 25, and is formed along the entire length of the third protective pipe piece 28 with the first dividing surface 28A side open. A recessed groove 28E for a storage hole is provided on the second dividing surface 28B of the third protective pipe piece 28. The recessed groove 28E for a storage hole consists of a groove with a semicircular cross-sectional shape corresponding to the cable storage hole 25C of the protective pipe 25, and is formed along the entire length of the third protective pipe piece 28 with the second dividing surface 28B side open.

[0032] The connecting portion 29 between the first protective pipe piece 26 and the second protective pipe piece 27 is provided with a notch 29A formed from the inside of the protective pipe 25. The notch 29A is formed as a wedge-shaped cut that opens towards the cable storage hole 25B side of the protective pipe 25 when the protective pipe 25 (first protective pipe piece 26, second protective pipe piece 27, third protective pipe piece 28) is displaced to the converged position shown in Figure 5. The connecting portion 30 between the second protective pipe piece 27 and the third protective pipe piece 28 is provided with a notch 30A formed from the inside of the protective pipe 25. The notch 30A is formed as a wedge-shaped cut that opens towards the cable storage hole 25C side of the protective pipe 25 when the protective pipe 25 is displaced to the converged position shown in Figure 5. These notches 29A and 30A act as fulcrums when the protective pipe 25 is displaced between the deployed position and the converged position, allowing this displacement to occur smoothly.

[0033] The locking mechanism 31 is provided on the first protective pipe piece 26 and the third protective pipe piece 28 that constitute the protective pipe 25. Specifically, the locking mechanism 31 consists of an engaging member 31A provided on the first protective pipe piece 26, which is one of the three protective pipe pieces, and a claw member 31B provided on the third protective pipe piece 28, which is the other protective pipe piece.

[0034] The engaging member 31A is integrally formed at both ends of the first protective pipe piece 26 in the longitudinal direction (only one is shown). The engaging member 31A is formed in the shape of a rectangular frame that protrudes from the dividing surface 26A of the first protective pipe piece 26 in a direction perpendicular to the longitudinal direction of the first protective pipe piece 26. The claw member 31B is integrally formed at both ends of the third protective pipe piece 28 in the longitudinal direction (only one is shown). The claw member 31B is formed in the shape of a triangular plate that protrudes from the first dividing surface 28A of the third protective pipe piece 28 in a direction perpendicular to the longitudinal direction of the third protective pipe piece 28. The claw member 31B engages with the engaging member 31A when the protective pipe 25 is displaced to the converged position. This fixes the protective pipe 25 in the converged position shown in Figure 5.

[0035] Thus, the protective pipe 25 is Length of protective pipe 25 It is composed of a first protective pipe piece 26, a second protective pipe piece 27, and a third protective pipe piece 28 that are connected to each other in the direction. In a plane along the longitudinal direction of the protective pipe 25, the protective pipe 25 is divided into a first protective pipe piece 26, a second protective pipe piece 27, and a third protective pipe piece 28 parallel to each other in the longitudinal direction of the protective pipe 25. The protective pipe 25 is displaced between the converged position shown in Figures 5 and 8 and the extended position shown in Figures 6 and 7. When the protective pipe 25 is in the converged position, the mounting grooves 26B of the first protective pipe piece 26, the mounting grooves 27C of the second protective pipe piece 27, and the mounting grooves 28C of the third protective pipe piece 28 form the guard bar mounting holes 25A of the protective pipe 25.

[0036] Similarly, when the protective pipe 25 is in a converged position, the recessed groove 26C for the storage hole of the first protective pipe piece 26 and the recessed groove 27D for the storage hole of the second protective pipe piece 27 form the cable storage hole 25B of the protective pipe 25. Furthermore, the recessed groove 26D for the storage hole of the first protective pipe piece 26 and the recessed groove 28D for the storage hole of the third protective pipe piece 28 form the cable storage hole 25D of the protective pipe 25. In addition, the recessed groove 27E for the storage hole of the second protective pipe piece 27 and the recessed groove 28E for the storage hole of the third protective pipe piece 28 form the cable storage hole 25C of the protective pipe 25.

[0037] Therefore, by displacing the protective pipe 25 to a converged position, the guard bar 19 is inserted into the guard bar mounting hole 25A, and the cables 22, 23, and 24 are stored individually in the cable storage holes 25B, 25C, and 25D, respectively. As a result, even if vibrations are transmitted to the cab 11 when the hydraulic excavator 1 is in operation, the cables 22, 23, and 24 stored individually in the cable storage holes 25B, 25C, and 25D will not rub against each other, thus preventing damage, short circuits, etc., to these cables 22, 23, and 24.

[0038] The hydraulic excavator 1 according to this embodiment has the protective pipe 25 as described above. The operator boards the cab 11, sits in the driver's seat 18, and operates a travel lever / pedal device (not shown) to drive the hydraulic excavator 1 to the work site. Next, the operator operates an operating lever device (not shown) to rotate the upper slewing body 3 and uses the work device 4 to perform excavation work on earth and sand.

[0039] Next, we will describe the process of connecting the additional monitoring devices 20 and 21 located inside the cab 11 to the controller (not shown) via cables 22, 23, and 24.

[0040] First, as shown in Figure 7, the protective pipe 25 is deployed, and the recessed groove 26B for the mounting hole of the first protective pipe piece 26 is attached to the outer circumference of the guard bar 19. In this state, for example, the cable 22 is inserted into the recessed groove 26C for the storage hole of the first protective pipe piece 26, the cable 24 is inserted into the recessed groove 26D for the storage hole of the first protective pipe piece 26, and the cable 23 is inserted into the recessed groove 27E for the storage hole of the second protective pipe piece 27.

[0041] Next, as shown in Figure 8, the protective pipe 25 is displaced from the deployed position to the retracted position. As a result, the first dividing surface 27A of the second protective pipe piece 27 and the first dividing surface 28A of the third protective pipe piece 28 come into contact with the dividing surface 26A of the first protective pipe piece 26, and the second dividing surface 27B of the second protective pipe piece 27 and the second dividing surface 28B of the third protective pipe piece 28 come into contact. In this case, a notch 29A is provided at the connection portion 29 between the first protective pipe piece 26 and the second protective pipe piece 27, and a notch 30A is provided at the connection portion 30 between the second protective pipe piece 27 and the third protective pipe piece 28. Therefore, the second protective pipe piece 27 folds smoothly toward the first protective pipe piece 26 with the notch 29A as a pivot point, and the third protective pipe piece 28 folds smoothly toward the second protective pipe piece 27 with the notch 30A as a pivot point, so that the protective pipe 25 can be smoothly displaced from the deployed position to the retracted position.

[0042] At this time, the recessed grooves 26B for mounting holes in the first protective pipe piece 26, the recessed grooves 27C for mounting holes in the second protective pipe piece 27, and the recessed grooves 28C for mounting holes in the third protective pipe piece 28 form a guard bar mounting hole 25A in the protective pipe 25, allowing the guard bar 19 to be quickly and easily attached to this guard bar mounting hole 25A. In addition, the recessed grooves 26C for storage holes in the first protective pipe piece 26 and the recessed grooves 27D for storage holes in the second protective pipe piece 27 form a cable storage hole 25B in the protective pipe 25, allowing the cable 22 to be stored in this cable storage hole 25B by itself. Furthermore, the recessed grooves 26D for storage holes in the first protective pipe piece 26 and the recessed grooves 28D for storage holes in the third protective pipe piece 28 form a cable storage hole 25D in the protective pipe 25, allowing the cable 24 to be stored in this cable storage hole 25D by itself. Furthermore, the recessed groove 27E for the storage hole of the second protective pipe piece 27 and the recessed groove 28E for the storage hole of the third protective pipe piece 28 form a cable storage hole 25C of the protective pipe 25, and the cable 23 can be stored in this cable storage hole 25C by itself.

[0043] Furthermore, when the protective pipe 25 is displaced to its converged position, the claw members 31B provided at both ends of the third protective pipe piece 28 engage with the engaging members 31A of the locking mechanism 31 provided at both ends of the first protective pipe piece 26. This allows the protective pipe 25 to be held in the converged position, and the cables 22, 23, and 24 can be individually stored in the cable storage holes 25B, 25C, and 25D of the protective pipe 25, and then attached to the guard bar 19.

[0044] Therefore, even if vibrations are transmitted to the cab 11 when the hydraulic excavator 1 is in operation, the cables 22, 23, and 24, which are individually stored in the cable storage holes 25B, 25C, and 25D, will not rub against each other, thus preventing damage, short circuits, etc., to these cables 22, 23, and 24. In addition, the aesthetics of the cab 11 can be improved compared to, for example, when the cables 22, 23, and 24 are fixed to the guard bar 19 using cable ties or the like. Furthermore, since the guard bar 19 is inserted into the guard bar mounting hole 25A of the protective pipe 25, the guard bar 19 can be wrapped around its entire circumference by the protective pipe 25, preventing the operator or others from colliding with the guard bar 19 inside the cab.

[0045] On the other hand, by displacing the protective pipe 25 to its deployed position, the guard bar mounting hole 25A can be removed from the guard bar 19, and the cables 22, 23, and 24 can be removed from the cable storage holes 25B, 25C, and 25D. This allows for quick and easy connection of the additional monitoring devices 20 and 21 to the controller (not shown) via the cables 22, 23, and 24.

[0046] Thus, according to this embodiment, the hydraulic excavator 1 is provided with a cab 11 having a driver's cab 17 formed inside and a right side window 15A that opens to the outside, and a guard bar 19 extending in the front-rear direction of the upper rotating body 3 is provided on the driver's cab 17 side of the right side window 15A, and a protective pipe 25 is provided which is made of a pipe body that extends along the guard bar 19 and has a guard bar mounting hole 25A that penetrates in the longitudinal direction of the pipe body, and a plurality of cable storage holes 25B, 25C, 25D arranged around the guard bar mounting hole 25A and penetrating in the longitudinal direction of the pipe body, and the protective pipe 25 individually stores cables 22, 23, 24 that are connected to additional monitoring devices 20, 21 located inside the cab 11 in the cable storage holes 25B, 25C, 25D when the guard bar 19 is inserted into the guard bar mounting hole 25A.

[0047] With this configuration, even if vibrations are transmitted to the cab 11 when the hydraulic excavator 1 is in operation, the cables 22, 23, and 24, which are individually stored in the cable storage holes 25B, 25C, and 25D, can be prevented from rubbing against each other, thereby preventing damage, short circuits, etc., to these cables 22, 23, and 24. In addition, by storing the cables 22, 23, and 24 in the protective pipe 25 that extends in the front-rear direction along the guard bar 19, the aesthetics of the cab 11 can be improved.

[0048] In this embodiment, the protective pipe 25 is composed of a plurality of protective pipe pieces (first protective pipe piece 26, second protective pipe piece 27, third protective pipe piece 28) connected to each other in a direction perpendicular to the longitudinal direction of the protective pipe 25. The first protective pipe piece 26, second protective pipe piece 27, and third protective pipe piece 28 can be displaced between a converged position in which the guard bar 19 is inserted into the guard bar mounting hole 25A and the cables 22, 23, and 24 are stored in the cable storage holes 25B, 25C, and 25D, and an extended position in which the guard bar 19 is removed from the guard bar mounting hole 25A and the cables 22, 23, and 24 are removed from the cable storage holes 25B, 25C, and 25D. This configuration improves the workability of connecting the additional monitoring devices 20 and 21 located inside the cab 11 to the controller (not shown) via the cables 22, 23, and 24.

[0049] In this embodiment, the first protective pipe piece 26, the second protective pipe piece 27, and the third protective pipe piece 28 are integrally molded using a resin material. This configuration allows for the mass production of protective pipes 25 having the same shape, which can also contribute to reducing manufacturing costs.

[0050] In this embodiment, the first protective pipe piece 26, the second protective pipe piece 27, and the third protective pipe piece 28 are integrally connected to each other via connecting parts 29 and 30 having notches 29A and 30A formed from the inside of the protective pipe 25. With this configuration, the protective pipe 25 can be smoothly displaced between an extended position and a retracted position, using the notches 29A and 30A of the connecting parts 29 and 30 as pivot points.

[0051] In this embodiment, the protective pipe 25 is provided with a locking mechanism 31 that fixes the first protective pipe piece 26, the second protective pipe piece 27, and the third protective pipe piece 28 in a converged position. This locking mechanism 31 consists of an engaging member 31A provided on the first protective pipe piece 26 (one of the protective pipe pieces) and a claw member 31B provided on the third protective pipe piece 28 (the other protective pipe piece excluding the first protective pipe piece) that engages with the engaging member 31A when the first protective pipe piece 26, the second protective pipe piece 27, and the third protective pipe piece 28 are displaced to a converged position. With this configuration, when the protective pipe 25 is displaced to a converged position, the claw member 31B engages with the engaging member 31A, thereby allowing the protective pipe 25 to maintain its converged position.

[0052] Next, Figures 9 and 10 show a second embodiment of the present invention, characterized in that the locking mechanism is composed of a nut fixed to one of the multiple protective pipe pieces and a bolt provided on another protective pipe piece. In this embodiment, the same reference numerals are used for the same components as in the first embodiment, and their descriptions are omitted.

[0053] The protective pipe 32 according to the second embodiment has a guard bar mounting hole 32A into which the guard bar 19 is inserted, and two cable storage holes 32B and 32C for individually storing two cables. The protective pipe 32 is composed of a first protective pipe piece 33, a second protective pipe piece 34, and a third protective pipe piece 35, similar to the protective pipe 25 according to the first embodiment.

[0054] The first protective pipe piece 33 is formed as a rod-shaped body having a semicircular cross-section and has a divided surface 33A. The divided surface 33A is provided with a recessed groove 33B for a mounting hole that constitutes a guard bar mounting hole 32A, and a recessed groove 33C for a storage hole that constitutes a cable storage hole 32B. In addition, both ends of the first protective pipe piece 33 in the longitudinal direction are provided with a nut housing portion 33D and a nut mounting portion 33E that open to the divided surface 33A, and a bolt insertion hole 33F is formed in the nut mounting portion 33E.

[0055] The second protective pipe piece 34 is connected to the first protective pipe piece 33 via a connecting portion 36 having a notch 36A formed from the inside of the protective pipe 32. The second protective pipe piece 34 is formed as a rod-shaped body having a quarter-circular (sector-shaped) cross-section and has a first dividing surface 34A and a second dividing surface 34B. At the corner where the first dividing surface 34A and the second dividing surface 34B intersect, a recessed groove 34C for a mounting hole, which constitutes the guard bar mounting hole 32A, is formed. The first dividing surface 34A is provided with a recessed groove 34D for a cable storage hole, which constitutes the cable storage hole 32B, and the second dividing surface 34B is provided with a recessed groove 34E for a cable storage hole, which constitutes the cable storage hole 32C.

[0056] The third protective pipe piece 35 is connected to the second protective pipe piece 34 via a connecting portion 37 having a notch 37A formed from the inside of the protective pipe 32. The third protective pipe piece 35 is formed as a rod-shaped body with a quarter-circular (sector-shaped) cross-section and has a first dividing surface 35A and a second dividing surface 35B. At the corner where the first dividing surface 35A and the second dividing surface 35B intersect, a recessed groove 35C for a mounting hole that constitutes a guard bar mounting hole 32A is formed, and a recessed groove 35D for a storage hole that constitutes a cable storage hole 32C is provided on the second dividing surface 35B. In addition, at both ends in the longitudinal direction of the third protective pipe piece 35, protrusions 35E are provided that project from the first dividing surface 35A toward the nut mounting portion 33E of the first protective pipe piece 33, and bolt insertion holes 35F are formed in the protrusions 35E (only one is shown).

[0057] The locking mechanism 38 consists of a nut 38A provided on the first protective pipe piece 33, which is one of the three protective pipe pieces, and a bolt 38B provided on the third protective pipe piece 35, which is another protective pipe piece. The nut 38A is attached to the nut mounting portion 33E of the first protective pipe piece 33 by means of welding or other means. The nut 38A is positioned concentrically with the bolt insertion hole 33F of the nut mounting portion 33E and is housed in the nut housing portion 33D. The bolt 38B is inserted through the bolt insertion hole 35F provided on the protruding portion 35E of the third protective pipe piece 35.

[0058] The protective pipe 32 according to this embodiment has the configuration described above, and by displacing the protective pipe 32, which is composed of the first protective pipe piece 33, the second protective pipe piece 34, and the third protective pipe piece 35, into a converged position, the guard bar 19 can be inserted into the guard bar mounting hole 32A of the protective pipe 32. In addition, cables can be individually stored in the cable storage holes 32B and 32C of the protective pipe 32, respectively.

[0059] When the protective pipe 32 is displaced to the converged position, the protruding portion 35E of the third protective pipe piece 35 overlaps with the nut mounting portion 33E of the first protective pipe piece 33. In this state, the bolt 38B inserted through the bolt insertion hole 35F is screwed onto the nut 38A through the bolt insertion hole 33F of the nut mounting portion 33E. This allows the protective pipe 32 to be fixed in the converged position using the locking mechanism 38.

[0060] In the first embodiment, three cable storage holes 25B, 25C, and 25D are provided in the protective pipe 25, and in the second embodiment, two cable storage holes 32B and 32C are provided in the protective pipe 32. However, the present invention is not limited to these, and a configuration with four or more cable storage holes may be provided, for example.

[0061] Furthermore, in the embodiment, a guard bar 19 is provided on the right side window 15A of the right side panel 15 that constitutes the cab 11, and a protective pipe 25 is attached to this guard bar 19. However, the present invention is not limited to this, and for example, if a guard bar is provided on the front window of the front panel, a protective pipe may be attached to the guard bar of this front window.

[0062] Furthermore, in the embodiment, a hydraulic excavator 1 is exemplified as a construction machine in which a protective pipe 25 is attached to the guard bar 19 of the cab 11. However, the present invention is not limited to this and can be broadly applied to other construction machines such as hydraulic cranes and wheel loaders. [Explanation of Symbols]

[0063] 3. Upper rotating body (vehicle body) 11 Cab 17 Driver's cab 15A Right side window (window) 19 Guard Bar 22, 23, 24 Cables 25,32 Protective pipes 25A, 32A Guard bar mounting holes 25B, 25C, 25D, 32B, 32C Cable storage holes 26,33 First protective pipe piece (protective pipe piece) 27,34 Second protective pipe piece (protective pipe piece) 28,35 Third protective pipe piece (protective pipe piece) 29, 30, 36, 37 Connection parts 29A, 30A, 36A, 37A Notches 31,38 Locking mechanism 31A Engaging Member 31B Claw member 38A Nut 38B Bolt

Claims

1. In a construction machine comprising a self-propelled body and a cab provided on the body, having a driver's compartment inside and a window opening to the outside, a guard bar extending in the front-rear direction of the body is provided on the driver's compartment side of the window, The protective pipe comprises a pipe body extending along the guard bar, having a guard bar mounting hole that penetrates the length of the pipe body, and a plurality of cable storage holes arranged around the guard bar mounting hole and penetrating the length of the pipe body, The construction machine is characterized in that, with the guard bar inserted into the guard bar mounting hole, the protective pipe stores cables connected to electrical equipment located inside the cab individually in the plurality of cable storage holes.

2. The protective pipe body is divided into a plurality of protective pipe pieces parallel to each other in a plane along the length direction of the protective pipe, The construction machine according to claim 1, wherein the plurality of protective pipe pieces are connected to each other in the longitudinal direction of the protective pipe, and are capable of displacing between a converged position in which the guard bar is inserted into the guard bar mounting hole and the cable is stored in the cable storage hole, and an unfolded position in which the guard bar is removed from the guard bar mounting hole and the cable is removed from the cable storage hole.

3. The construction machine according to claim 2, characterized in that the plurality of protective pipe pieces are integrally molded using a resin material.

4. The construction machine according to claim 2, characterized in that the plurality of protective pipe pieces are integrally connected to each other via connecting portions having notches formed from the inside of the protective pipes.

5. The construction machine according to claim 2, characterized in that the protective pipe is provided with a locking mechanism for fixing the plurality of protective pipe pieces in the converged position.

6. The locking mechanism includes an engaging member provided on one of the multiple protective pipe pieces, The construction machine according to claim 5, characterized in that it comprises a claw member provided on the protective pipe pieces other than the one protective pipe piece among the plurality of protective pipe pieces, and which engages with the engaging member when the plurality of protective pipe pieces are displaced to the converged position.

7. The locking mechanism includes a nut fixed to one of the multiple protective pipe pieces, The construction machine according to claim 5, characterized in that it is provided on the protective pipe pieces other than the one protective pipe piece among the plurality of protective pipe pieces, and is configured to be screwed into the nut when the plurality of protective pipe pieces are displaced to the converged position.

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