JPH0649189U - Hydraulic excavator - Google Patents

Abstract

(57) [Summary] [Purpose] During night work or dark work, the bucket side is effectively illuminated to facilitate night work and improve work efficiency and safety. [Structure] The flange 10B on the lower surface side of the arm 10 is provided with a work lamp 21 that emits light toward the bucket 11 side. As a result, when the worker operates the switch in the operator's cab 5 to turn on the work light 21, the bucket 1 is illuminated by the light from the work light 21 regardless of the angle of the arm 10.
The first side is illuminated, and the operator visually recognizes the excavation target and the like.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a hydraulic excavator including a work device including a boom, an arm, and a bucket, and particularly to a hydraulic excavator including a backhoe-type bucket.

[0002]

[Prior art]

 FIG. 4 illustrates a wheel type hydraulic excavator as an example of a conventional hydraulic excavator.

In the drawings, 1 is a wheel-type lower traveling structure, 2 is an upper revolving structure provided on the lower traveling structure 1 so as to be rotatable through a revolving device 3, and the upper revolving structure 2 is A driver's cab 5, a machine room 6, a counterweight 7, etc. are provided on the revolving frame 4.

Reference numeral 8 denotes a working device provided on the revolving frame 4 adjacent to the operator's cab 5. The working device 8 is rotatably provided on a mounting bracket (not shown) of the revolving frame 4. The boom 9, the arm 10 rotatably provided on the tip side of the boom 9, and the backhoe type bucket 11 rotatably provided on the tip side of the arm 10 and having the claw portion 11A. The boom 9, the arm 10, and the bucket 11 are roughly configured to be rotated by a boom cylinder 12, an arm cylinder 13, and a bucket cylinder 14, respectively.

Here, the boom 9 is composed of left and right webs 9A, 9A (only one side is shown) and upper and lower flanges 9B, 9B welded to the upper and lower ends of each web 9A. It has a rectangular hollow structure. Further, the arm 10 is similar to the boom 9 in that the left and right webs 10A and 10A (only one side is shown) and the upper and lower flanges 10B welded to the upper and lower ends of each web 10A. , 10B, etc., to form a rectangular hollow structure.

Reference numeral 15 is a front wheel provided on the left side and right side of the lower traveling body 1, and 16 is a rear wheel (one side) provided on the rear side of the lower traveling body 1. Respectively), and the wheels 15 and 16 are respectively connected to a front axle and a rear axle (neither is shown) via universal joints.

Reference numeral 17 denotes a work lamp provided on one of the webs 9A of the boom 9 located on the cab 5 side, and the work lamp 17 is composed of, for example, a halogen lamp (not shown). The work lamp 17 illuminates the front of the boom 9 by operating a work lamp switch (not shown) in the operator's cab 5 during nighttime work, and the bucket 11 etc. To illuminate.

Reference numeral 18 denotes a front side illumination lamp provided on the front side of the revolving frame 4, and the front side illumination lamp 18 is composed of a halogen lamp (not shown) or the like, and is used when the hydraulic excavator is running at night. It illuminates the direction of travel.

The hydraulic excavator according to the prior art has the above-described structure, and by excavating earth and sand by rotating the boom 9, the arm 10, and the bucket 11 via the cylinders 12, 13, and 14. Is performed. Further, at night, the work light 17 is turned on to illuminate the bucket 11 and perform nighttime work.

[0010]

[Problems to be solved by the device]

 By the way, in the conventional hydraulic excavator described above, since the work light 17 is provided on the boom 9, the night work is performed by turning on the work light 17.

However, since the boom 9 and the arm 10 are not in a fixed relationship and the positional relationship between the boom 9 and the arm 10 changes sequentially according to the working state, for example, when the arm 10 extends along the axis of the boom 9. Can illuminate the front bucket 11 and the like with the work light 17, but as shown in FIG. 4, the arm 10 is substantially orthogonal to the boom 9, and the arm 10 is under the boom 9. In such a case, the work lamp 17 cannot illuminate the bucket 11 side.

Therefore, in the above-described conventional technique, the illumination state by the work lamp 17 is sequentially changed according to the work state of the excavation work during nighttime work, and the bucket 11 side is intermittently illuminated, so that the worker Cannot reliably see the excavation target, the amount of excavation, etc. of the bucket 11, which reduces operability and significantly reduces the work efficiency of night work and dark place work.

In addition, as a result of frequent changes in the lighting condition, not only the fatigue of the worker increases, but also it is difficult to see other workers working around the bucket 11 and the construction machine, so that the safety is also greatly improved. There is a problem that it drops to.

The present invention has been made in view of the above-mentioned problems of the prior art, and it is possible to effectively illuminate the bucket side during nighttime work or dark place operation, thereby smoothing nighttime work and improving work efficiency. It is an object of the present invention to provide a hydraulic excavator capable of significantly improving safety and the like.

[0015]

[Means for Solving the Problems]

 In order to solve the above-mentioned problems, the features of the configuration adopted by the present invention are that the lower traveling body, the upper revolving body provided on the lower traveling body so as to be rotatable, and the upper revolving body capable of being lowered and raised. The work device includes a boom rotatably provided on the upper swing body, an arm rotatably provided on a tip side of the boom, and a tip side of the arm. A work lamp for irradiating light toward the bucket side is provided on the lower surface side of the arm.

[0016]

[Action]

 When a work light provided on the lower surface of the arm is turned on during nighttime work or dark work, the bucket light provided on the tip end side of the arm is illuminated by the work light. Visually confirms the excavation target to be excavated by.

[0017]

【Example】

 Hereinafter, an embodiment of the present invention will be described with reference to FIGS. In the embodiment, the same components as those of the prior art shown in FIG. 4 described above are designated by the same reference numerals, and the description thereof will be omitted.

In the figure, reference numeral 21 denotes a work light applied to this embodiment in place of the work light 17 described in the prior art. The work light 21 is composed of a cover 22 and a work light body 24, etc., which will be described later, It is located on the lower surface side of the arm 10 and attached to the flange 10B. Then, the work lamp 21 is rotated to the maximum inside by the operator operating a switch (not shown) in the operator's cab 5, as indicated by a chain double-dashed line in FIG. At this time, the range from the claw portion 11A of the bucket 11 to the mounting portion of the bucket 11 is irradiated with light and illuminated.

Reference numeral 22 denotes a cover that constitutes the work lamp 21, and the cover 22 is, as shown in FIGS. 2 and 3, an upper cover 22A formed in a substantially rectangular shape from an iron plate or the like, and a lower portion of the upper cover 22A. It is formed in a box shape from a flat plate-like lower cover 22B provided by covering the side, and a window portion 22C opening toward the bucket 11 side is formed on the front side of the upper cover 22A. The cover 22 is attached to the flange 10B of the arm 10 via the four bolts 23, 23, ... To prevent the work light body 24 from being damaged by flying stones or the like generated during excavation work. Is.

Reference numeral 24 denotes a waterproof work light body provided in the cover 22, and the work light body 24 has a casing 24A in the shape of a closed container and a convex spherical surface provided at the tip side of the casing 24A. A lens 24B, a halogen lamp 24C provided in the casing 24A, an electric circuit (not shown) including a battery power source, etc., which is connected to the halogen lamp 24C at one end side and is provided at the upper swing body 2 at the other end side. The harness 24D is connected to the harness 24D, and a seal member 25 is provided at the outlet of the harness 24D from the casing 24A. The work lamp body 24 irradiates the light from the halogen lamp 24C toward the bucket 11 side at a predetermined angle θ while condensing the light by the lens 24B.

Here, as shown in FIG. 1, the predetermined angle θ is set so that when the bucket 11 is rotated to the side of the arm 10 to the maximum extent, the entire bucket 11 is illuminated.

Reference numeral 26 denotes a cushioning member which is provided between the cover 22 and the work light body 24 and is made of, for example, urethane rubber or the like. The cushioning member 26 is filled with earth and sand through the window 22C of the cover 22. It is intended to prevent clogging due to the intrusion of the like and to prevent the impact applied to the cover 22 from being directly transmitted to the work light body 24.

The hydraulic excavator according to the present embodiment has the above-mentioned configuration, and its basic operation is not significantly different from that of the conventional art.

In the present embodiment, however, the flange 10B on the lower surface side of the arm 10 is provided with the work lamp 21 that irradiates the bucket 11 with light within the range of the predetermined angle θ. Therefore, the dotted line in FIG. As shown, regardless of the angular relationship between the bucket 11 and the arm 10, it is possible to effectively illuminate the bucket 11 side from the substantially same direction at all times.

As a result, it is possible to surely prevent the illumination state on the bucket 11 side from becoming unstable depending on the angle of the arm 10 during nighttime work or dark place work, and stabilize the illumination state to allow nighttime operation. The work at the time of work can be smoothed, and work efficiency, safety, operability, etc. can be greatly improved. In particular, when the bucket 10 is dumped, the excavation target can be illuminated brightly by the work lamp 21, so that the visibility of the work target is significantly improved.

The work light 21 includes an iron cover 22, a work light main body 24 provided in the cover 22, a cushioning member 26 provided between the work light main body 24 and the cover 22, and the like. With this configuration, it is possible to prevent the work lamp main body 24 from being damaged by flying stones generated during the excavation work, and it is possible to significantly improve the life.

Further, since the lens 24B of the work lamp body 24 is formed in a convex spherical shape, dust and the like adhering to the lens 24B can be effectively dropped by utilizing vibration during the work, etc. It is possible to prevent the illuminance from decreasing due to dirt on the surface and improve reliability.

In the above embodiment, the halogen lamp 24C is used as the light source of the work lamp 21, but the present invention is not limited to this, and other light sources such as a xenon lamp may be used.

Further, in the above-described embodiment, the wheel type hydraulic excavator has been described as an example, but the present invention can also be applied to a crawler type hydraulic excavator.

[0030]

[Effect of device]

 As described above in detail, according to the present invention, since the work lamp for irradiating the light toward the bucket side is provided on the lower surface side of the arm, during nighttime work or dark place work, regardless of the angle of the arm. The work light can effectively illuminate the bucket side provided on the tip side of the arm. As a result, it is possible to reliably prevent the lighting condition from becoming unstable due to the working condition, smooth the night work, and improve working efficiency, operability, safety, and the like.

[Brief description of drawings]

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

2 is an enlarged plan view showing a work lamp in FIG. 1. FIG.

3 is a sectional view taken along the line III-III in FIG.

FIG. 4 is a side view of a hydraulic excavator according to the related art.

[Explanation of symbols]

 1 Lower Traveling Body 2 Upper Revolving Body 8 Working Device 9 Boom 10 Arm 11 Bucket 21 Working Light

Claims (1)

[Scope of utility model registration request] 1. A lower traveling body, an upper revolving body rotatably provided on the lower traveling body, and a working device provided on the upper revolving body so as to be able to move up and down. In a hydraulic excavator including a boom rotatably provided on a revolving structure, an arm rotatably provided on a tip side of the boom, and a bucket rotatably provided on a tip side of the arm, A hydraulic excavator characterized in that a work lamp for irradiating light toward the bucket side is provided on a lower surface side of the arm.