Construction machine

Abstract

To provide a construction machine which can specify a winch drum selected as an operation object and easily confirm a correspondence relation between the winch drum and an operation system in operation.SOLUTION: In a construction machine, a single drum operation lever for selectively operating a plurality of winch drums, a plurality of drum brake pedals corresponding to each winch drum, a selection switch 38a for selecting a winch drum as an operation object, and a plurality of drum display lamps 39a, 39b for notifying the winch drum as the operation object selected by the selection switch by lighting of a lamp are arranged. A first drum brake pedal and the first drum display lamp 39a are colored in the same color as a color related to a first winch operation. A second drum brake pedal and the second drum display lamp 39b are colored in the same color as a color related to a second winch operation different from the color related to the first winch operation.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to construction machinery such as cranes, pile drivers, and excavators, and more particularly to construction machinery having an operating lever for operating a winch and a brake pedal in a driver's cab. [Background technology]

[0002] In the cab of a construction machine such as a crane, a pile driver, or an excavator, there are provided a plurality of operation levers for operating a plurality of winch drums mounted on a rotating body, and a plurality of brake pedals corresponding to each winch drum. Although such winch-system operation devices have excellent operability due to the narrow spacing between adjacent levers and between pedals, they are prone to operational errors such as stepping on the wrong pedal. Therefore, a construction machine has been proposed in which the operation levers and brake pedals corresponding to each winch drum are colored the same color, allowing the driver to easily check the correspondence between each winch drum and each operation system (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2012-56751 A Summary of the Invention [Problem to be solved by the invention]

[0004] With the recent multi-functionalization of construction machines, there is a concept of giving an operating device an integrated function. For example, as shown in FIG. 7, the operation (unwinding and retracting) of the winch drum is assigned to the forward and backward tilting direction of an operating lever 100 that can be tilted forward, backward, left and right, and as shown in FIG. 8, a changeover valve 106 is provided on a hydraulic circuit between two hydraulic motors 103, 104 that drive a first winch drum 101 and a second winch drum 102, respectively, and a control valve 105, and a changeover command by a switch operation is given to the changeover valve 106 to set an operation target, so that the first winch drum 101 and the second winch drum 102 can be selectively operated by an operation command from a single operating lever 100. However, when the technology described in Patent Document 1 is applied to such an integrated operating device, the correspondence (in principle, one-to-one relationship) between the number of operating levers and the number of operating pedals is lost, and there is a problem that they cannot be simply color-coded.

[0005] Therefore, an object of the present invention is to provide a construction machine that can identify the winch drum selected as the object to be operated and can easily confirm the correspondence between the winch drum and the operating system during operation. [Means for solving the problem]

[0006] In order to achieve the above object, the construction machine of the present invention has an upper rotating body rotatably provided on an upper part of a lower traveling body, the upper rotating body being provided with a plurality of winch drums, a wire rope wound around each winch drum, and a driver's cab, and the driver's cab is provided with a single drum operation lever for selectively operating each of the winch drums, a plurality of drum brake pedals corresponding to each of the winch drums, a selection switch for selecting the winch drum to be operated, and a plurality of drum indicator lamps for indicating the winch drum to be operated selected by the selection switch by turning on a lamp, and the plurality of winch drums are a first winch drum for winding a first wire rope, a second winch drum for winding a second wire rope, and a third winch drum for winding a second wire rope. the first drum brake pedal and the first drum indicator lamp are colored in the same color as a color associated with a first winch operation, and the second drum brake pedal and the second drum indicator lamp are colored in the same color as a color associated with a second winch operation that is different from the color associated with the first winch operation. Effect of the Invention

[0007] According to the construction machine of the present invention, the drum brake pedals and drum indicator lamps corresponding to the multiple winch drums are colored the same color but different for each winch operation target, so that when multiple winch drums are operated with a single drum operation lever, the drum indicator lamp lights up, allowing the driver to correctly recognize the operation target and perform the desired winch operation. Moreover, it becomes possible to operate the drum brake pedal while paying attention to the position of the drum brake pedal, which is colored the same color as the drum indicator lamp, which is also excellent from the viewpoint of preventing erroneous operation when operating the winch. [Brief description of the drawings]

[0008] [Figure 1] 1 is a perspective view of a driver's seat provided in a construction machine showing an embodiment of the present invention; [Diagram 2] FIG. 11 is a diagram of the operation panel showing the lighting state of the first drum indicator lamp. [Diagram 3] FIG. 11 is a diagram of the operation panel showing the lighting state of the second drum indicator lamp. [Figure 4] 1 is a side view of an excavator showing an example of a construction machine to which the present invention can be applied. [Diagram 5] FIG. 4 is a front view of the first and second winch drums. [Figure 6] FIG. 2 is a perspective view of the first and second winch drums. [Figure 7] FIG. 1 is an explanatory diagram of a winch operating lever in the prior art. [Figure 8] FIG. 1 is a control circuit diagram of a winch drum in the prior art. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] 1 to 6 show an excavator as an example of a construction machine to which the present invention can be applied. As shown in Fig. 4, the excavator 11 is a multipurpose excavation machine capable of various construction works such as casing excavation and ground improvement work, and is equipped with a lower traveling body 12 equipped with crawlers, an upper rotating body 13 rotatably provided on the lower traveling body 12 and equipped with a driver's cab 14 on one side, a leader (hoisting member) 15 provided in front of the upper rotating body 13 so as to be able to be raised and lowered, a hoisting cylinder 16 supporting the leader 15 from the rear, and multiple winch drums 17, 18, 19 for winding wire ropes 20, 21, 22 for various uses.

[0010] The multiple winch drums 17, 18, 19 are provided in two rows, front and rear, in the center in the width direction of the upper rotating body 13. Specifically, a first winch drum (main drum) 17 for winding a first wire rope 20 and a second winch drum (sub drum) 18 for winding a second wire rope 21 are arranged side by side on the rear side, and a third winch drum (third drum) 19 for winding a third wire rope 22 is arranged on the front side.

[0011] Each winch drum 17, 18, 19 is equipped with a hydraulic brake device having a clutch mechanism, and when the hoist is to be idled to allow the hoist to free fall, the clutch is manually disengaged by the operator and the speed is adjusted by the degree to which the brake pedal is depressed. As shown in Figures 5 and 6, the first winch drum 17 and the second winch drum 18 have a single power transmission system made up of a drive shaft 23, a reduction mechanism 24, and a hydraulic motor 25, but the power transmission system may be divided into two systems, one for each of the winch drums 17 and 18.

[0012] The wire ropes 20, 21, 22 paid out from each winch drum 17, 18, 19 hang down in front of the leader 15 through a guide sheave 26 provided on the rear side of the leader 15 and multiple guide sheaves 27a, 27b of a top sheave block 27 provided at the upper end of the leader 15, and suspend various types of hoisting equipment (e.g., a kelly bar, a hammer grab, a hammer crown, a hook device, etc.) that can be raised and lowered, although not shown in the figure.

[0013] 1 shows a driver's seat provided in the driver's cab 14. In the driver's seat, devices such as operation levers and pedals for driving, turning, winch operation, etc., push button switches, and a touch panel display are arranged in a concentrated manner, taking into consideration the driving operations of the driver seated in the seat 28. A left-hand side operation input unit 29 operated with the left hand and a right-hand side operation input unit 30 operated with the right hand are arranged side-by-side with the seat 28 in between in the space to the left of the driver's seat.

[0014] Each of the left and right operation input units 29, 30 is provided with one operation lever (two-axis operation lever in the front-rear and left-right directions) 31, 32 that can be used as the main operation for operating the machine. The operation directions (releasing and winding) of the first to third winch drums 17, 18, 19 can be assigned arbitrarily to each axis of the operation levers 31, 32, but in this embodiment, the operation of the first winch drum 17 and the second winch drum 18 is set to use the same axis by selection. Specifically, the operation directions of the first and second winch drums 17, 18 are assigned to the front-rear tilting direction of the left-hand operation lever 31.

[0015] An operation panel 33 for turning the power on and off and setting various modes (control methods), which will be described in detail later, is disposed in front of the left-hand operation lever (hereinafter referred to as the drum operation lever) 31. Furthermore, a first drum brake pedal 34 for braking the first winch drum, a second drum brake pedal 35 for braking the second winch drum, and a third drum brake pedal 36 for braking the third winch drum are disposed on the floor in the center of the front part of the driver's seat, in that order from the left side.

[0016] As shown in Figures 2(a) and 3(a), the operation panel 33 has been designed with visibility and operability in mind. Below the power switch (key switch) 37, there is a setting input section 38 consisting of a number of button switches arranged in a horizontal row on the left and right, while above it there are display lamps 39 which indicate the various modes set in the setting input section 38 by lighting up LED lamps arranged in a predetermined array (5 rows and 4 columns).

[0017] As shown in Fig. 2(b) and Fig. 3(b), each LED lamp is fitted with a display panel with pictograms indicating various modes in a square panel case, and light emitted from an LED (Light Emitting Diode) is emitted to the outside (driver's seat) through the display panel. For example, of the LED lamps 39a, 39b adjacent to each other on the left and right, the display panel has a pictogram (a picture of a winch and the letters "MAIN") indicating the first winch drum 17 on the left side and a pictogram (a picture of a winch and the letters "AUX") indicating the second winch drum 18 on the right side. When these two LED lamps (hereinafter referred to as the first and second drum display lamps) 39a, 39b are turned on, the surface of the display panel is brightly illuminated, i.e., the display of the pictogram is emphasized and the visibility is improved.

[0018] In the setting input section 38, one of the multiple button switches located at the rightmost position is a selection switch 38a that alternately selects the first winch drum 17 and the second winch drum 18 as the operation target. Then, every time this one selection switch 38a is pressed, a switching signal is output, and hydraulic control is performed to alternately switch the transmission power of the drive shaft 23 between the first winch drum 17 and the second winch drum 18 (FIGS. 5 and 6). At this time, the indicator lamp 39 receives the switching signal from the selection switch 38a, and when the first winch drum 17 is selected, the display of the drum indicator lamps 39a, 39b is switched between the two as shown in the display of FIG. 2 (the first drum indicator lamp 39a is lit), and when the second winch drum 18 is selected, the display of the drum indicator lamps 39a, 39b is switched between the two as shown in the display of FIG. 3 (the second drum indicator lamp 39b is lit). In this way, the driver can selectively operate the first winch drum 17 and the second winch drum 18 with the single drum operation lever 31.

[0019] 2 and 3 in addition to Fig. 1, for example, the tread surface of the first drum brake pedal 34 and the first drum indicator lamp 39a are colored red as a color associated with the first winch operation (first winch drum 17), and the tread surface of the second drum brake pedal 35 and the second drum indicator lamp 39b are colored blue as a color associated with the second winch operation (second winch drum 18) which is different from the red color associated with the first winch operation. Note that red and blue LEDs can be used as light sources for coloring the drum indicator lamps 39a and 39b.

[0020] According to the construction machine of the present invention configured in this way, the drum brake pedals 34, 35 and drum indicator lamps 39a, 39b corresponding to the multiple winch drums 17, 18, respectively, are colored the same color for each winch operation target, so that when multiple winch drums 17, 18 are operated with a single drum operation lever 31, the driver can perform the desired winch operation while correctly recognizing the operation target by the lighting of the drum indicator lamps 39a, 39b. Moreover, it becomes possible to operate the machine while paying attention to the position of the drum brake pedals 34, 35, which are colored the same color as the drum indicator lamps 39a, 39b, which is also excellent from the viewpoint of preventing erroneous operation when operating the winch.

[0021] The present invention is not limited to the above-mentioned embodiment, and the color unified for each winch operation is arbitrary. For example, a colored rubber cover can be placed over the drum brake pedal, and a drum indicator lamp can be illuminated from the back side using a paint-coated indicator panel other than an LED light source. The specifications of the drum operation lever, for example, the allocation of winch operations to each axis, can be changed as appropriate according to the structure and arrangement of the lever. Furthermore, although an excavator is shown as an example of a construction machine, the present invention is not limited to this, and can be applied to various construction machines equipped with multiple winch drums according to the purpose, such as pile drivers, ground improvement machines, cranes, and earth drills. [Explanation of symbols]

[0022] 11...excavator, 12...lower running body, 13...upper rotating body, 14...operator cab, 15...leader, 16...derailing cylinder, 17...first winch drum, 18...second winch drum, 19...third winch drum, 20...first wire rope, 21...second wire rope, 22...third wire rope, 23...drive shaft, 24...reduction mechanism, 25...hydraulic motor, 26...guide sheave, 27...top sheave block, 27a,2 7b...guide sheave, 28...seat, 29...left hand side operation input section, 30...right hand side operation input section, 31, 32...operation lever, 33...operation panel, 34...first drum brake pedal, 35...second drum brake pedal, 36...third drum brake pedal, 37...power switch, 38...setting input section, 38a...selection switch, 39...indicator lamp, 39a...first drum indicator lamp, 39b...second drum indicator lamp

Claims

[Claim 1] A construction machine comprising an upper rotating body rotatably provided on an upper portion of a lower traveling body, the upper rotating body being provided with a plurality of winch drums, a wire rope wound around each of the winch drums, and a driver's cab, the driver's cab being provided with a single drum operation lever for selectively operating each of the winch drums, a plurality of drum brake pedals corresponding to each of the winch drums, a selection switch for selecting a winch drum to be operated, and a plurality of drum indicator lamps for indicating, by lighting, which winch drum selected by the selection switch, The plurality of winch drums include a first winch drum for winding a first wire rope and a second winch drum for winding a second wire rope, The plurality of drum brake pedals include a first drum brake pedal for braking the first winch drum and a second drum brake pedal for braking the second winch drum, The plurality of drum indicator lamps include a first drum indicator lamp for indicating the first winch drum and a second drum indicator lamp for indicating the second winch drum, The first drum brake pedal and the first drum indicator lamp are colored in the same color as a color associated with a first winch operation, A construction machine characterized in that the second drum brake pedal and the second drum indicator lamp are colored in the same color as a color associated with a second winch operation which is different from the color associated with the first winch operation.

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