JPH0565726A - Travelling monitor - Google Patents

Abstract

PURPOSE:To prevent maloperation of a travelling lever by designing so that an operator can confirm the transfer direction of the lower frame, while the upper frame turns. CONSTITUTION:A sensor 20 is provided to detect the positional relation of the lower frame and the upper frame and to judge the transfer direction of the lower frame against the upper frame. And an indicating means is provided at the travelling lever 24 to show the transfer direction of the judged lower frame.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a civil engineering work vehicle, and more particularly to a traveling monitor device for displaying the traveling direction of a machine body.

[0002]

2. Description of the Related Art In a civil engineering work vehicle such as a power shovel, an upper frame is rotatable in a horizontal direction with respect to a lower frame, and is provided on the upper frame side when the upper frame is swiveled for excavation work. It is difficult for the operator sitting on the seat to determine in which direction the front part of the lower frame is located. Therefore, when the machine body is made to travel in a turning state, the travel lever is slightly actuated to one of the directions, and after confirming in which direction the machine body is traveling, the operation direction of the travel lever is determined.

[0003]

As described above, in the conventional civil engineering work vehicle, when the upper frame is turned to the left or right, the positional relationship with the lower frame may become unclear, and the traveling lever is slightly moved. Since then, I have confirmed the traveling direction of the aircraft. However, when there is an obstacle in the traveling direction of the aircraft while working in a narrow space, or when working in the vicinity of the excavated hole, the traveling lever is mistakenly If operated in the direction in which the hole exists, there is a risk that the aircraft will collide with an obstacle or fall into the hole, which is extremely dangerous.

Therefore, there arises a technical problem to be solved in order for the operator to recognize the traveling direction of the lower frame when the upper frame is turning and to prevent the erroneous operation of the traveling lever. The present invention aims to solve this problem.

[0005]

SUMMARY OF THE INVENTION The present invention has been proposed in order to achieve the above-mentioned object, and in a civil engineering work vehicle in which an upper frame can freely rotate in a horizontal direction relative to a lower frame, It is characterized in that a sensor for detecting a positional relationship with the upper frame is provided, and a means for discriminating a traveling direction of the lower frame with respect to the upper frame based on a detection value of the sensor and displaying the traveling direction on the traveling lever is provided. A travel monitor device is provided.

[0006]

When the upper frame turns, the sensor detects the turning position of the upper frame. Based on the detection value of this sensor, it is determined which direction the front portion of the lower frame is located with respect to the upper frame. Then, the above-mentioned discrimination result is displayed on the display means provided on the traveling lever so that the operator can recognize the traveling direction of the machine body when operating the traveling lever.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to the drawings. FIG. 1 is a side view of an ultra-compact excavation work vehicle 11. Traveling bodies 12, 12 such as crawlers are attached to the left and right of a lower frame (not shown), and an upper unit is mounted on the upper portion of the lower frame via a turning device 13. Frame (not shown)
Is mounted so that it can rotate freely. Then, the frame cover 14 is attached to the upper frame to cover the engine part such as the engine, and the hydraulic excavator 15 is provided in the front part of the upper frame. Further, various operation levers 16 are projected on the upper surface of the front portion of the frame cover 14, and a seat 17 for an operator is fixed on the upper surface of the rear portion of the frame cover 14. Further, a dozer 18 for earth removal is provided at the front part of the lower frame. A swivel joint 19 is provided inside the turning device 13 to connect the hydraulic circuits on the lower frame side and the upper frame side. A sensor 20 is provided below the swivel joint 19 to detect the turning position of the upper frame.

FIG. 2 shows the arrangement of the sensor 20 provided below the swivel joint 19, and the outer peripheral surface of the swivel joint 19 which rotates integrally with the upper frame has a quarter of the circumferential length, that is, the center O. The recessed portion 21 is stepped in the range of 90 °. And the swivel joint 1
Push switch type sensors 20a, 2
0b is provided, sensors 20c and 20d of the same type are provided in the left-right direction of the swivel joint 19, and the respective tips are brought into contact with the outer peripheral surface of the swivel joint 19. Each of the sensors 20a to 20d provided on the lower frame side has a horizontal 90
The three sensors, which are arranged at intervals of ° and are located in the recessed portion 21 of the swivel joint 19, are
The respective tip portions are pressed by the outer peripheral surface of the swivel joint 19 to be in the off state, and only the sensor located in the recessed portion 21 projects the tip portions to be in the on state.

FIG. 3 shows a circuit diagram of each of the sensors 20a to 20d. A light emitting body 22 such as an LED is connected in series with the sensor 20a.
a, 23a are connected, and in the same manner, the sensor 20b is provided with the light emitters 22b and 23b, the sensor 20c is provided with the light emitter 22c,
23c and the sensor 20d are connected in series with the light-emitting bodies 22d and 23d, respectively, and the light-emitting bodies 22a to 22d constitute the first display means 22 and the light-emitting bodies 23a to 23d constitute the second display means 23. .. Accordingly, when the swivel joint 19 is rotated and any one of the sensors 20 is turned on, the predetermined light emitters of the first display means 22 and the second display means 23 connected to the sensors are activated. Light. It should be noted that each light emitting body may be displayed by blinking.

In each operating lever 16 shown in FIG. 1,
A travel lever 24 for switching between forward and backward movement of the machine body is provided, and FIG. 4 shows a mounting panel 25 of the travel lever 24.
When the traveling lever 24 is rotated to the front side (the arrow X direction) or the rear side (the arrow Y direction) of the frame cover 14, the driving directions of the left and right traveling bodies 12, 12 are reversed, and the forward and backward movement of the machine body is performed. Will switch. Then, the first display means 22 is provided on the side of the mounting panel 25 in the arrow X direction, and the second display means 22 is provided on the side of the arrow Y direction.
The display means 23 is provided.

The lower frame 2 shown in FIGS.
6 shows four modes of the positional relationship between 6 and the upper frame 27. FIG. 5 shows a case where the upper frame 27 is located within the range of 90 ° about the direction in which the front portion of the lower frame 26 is located (the direction of arrow F) (hereinafter referred to as the state). Further, FIG. 6 shows a case where the upper frame 27 is located within a range of 90 ° about the direction opposite to the direction in which the front portion of the lower frame 26 is located (direction of arrow F) (hereinafter referred to as a state). Indicates. And
FIG. 7 shows a case where the upper frame 27 is positioned within the range of 90 ° centered on the left side of the direction in which the front portion of the lower frame 26 is positioned (direction of arrow F) (hereinafter referred to as “state”), Furthermore, FIG. 8 shows the lower frame 2.
The case where the upper frame 27 is located within the range of 90 ° centering on the right side of the direction in which the front part of 6 is located (the direction of arrow F) (hereinafter referred to as the state) is shown.

Next, the detection value of the sensor 20 at each position of the above-mentioned upper frame 27 and the first display means 2
Table 1 shows the operation of the second and second display means 23. For example, in the state of, the direction of the upper frame 27 on which the operator is sitting and the direction in which the front portion of the lower frame 26 is located (the direction of arrow F) match, and the swivel joint 19 shown in FIG. The part 21 rotates to the position of the sensor 20a, and the sensor 20a is turned on. Then, as shown in FIG. 3, when the sensor 20a is turned on, the luminous body 2
2a and 23a are lit. Therefore, the first shown in FIG.
22a of the display means 22 and the second display means 23
When the traveling lever 24 is operated in the arrow X direction, the aircraft advances to the front direction where the operator is sitting, and when the traveling lever 24 is operated in the arrow Y direction, the aircraft moves backwards. By displaying that the vehicle is moving backward, the operator can recognize the traveling direction of the aircraft.

[0013]

[Table 1]

In the above state, the direction of the upper frame 27 and the direction in which the front portion of the lower frame 26 is located (the direction of arrow F) are opposite to each other, and as shown in Table 1,
The light emitter 22b of the first display means 22 and the light emitter 23b of the second display means 23 are turned on. Therefore, if the traveling lever 24 shown in FIG. 4 is operated in the direction of arrow X, the aircraft moves backward in the direction in which the operator is sitting, and if the traveling lever 24 is operated in the direction of arrow Y, the aircraft moves forward in the direction of the operator. It is possible to make the operator recognize it by displaying the message.

On the other hand, in the state of, the upper frame 2
7 is directed to the left in the direction in which the front portion of the lower frame 26 is located (the direction of arrow F), and as shown in Table 1, the light-emitting body 22c of the first display means 22 and the second light-emitting body 22c. The light-emitting body 23c of the display means 23 lights up. Therefore, if the traveling lever 24 shown in FIG. 4 is operated in the direction of the arrow X, the machine body advances to the right where the operator is sitting, and the traveling lever 2
By operating 4 in the direction of the arrow Y, it is displayed that the machine is moving to the left of the operator, and the operator can recognize it.

Further, in the state of, the upper frame 27
Is directed to the right of the direction in which the front portion of the lower frame 26 is located (the direction of arrow F), and as shown in Table 1, the light-emitting body 22d of the first display means 22 and the second display means. The luminous body 23d of 23 is turned on. Therefore, if the travel lever 24 shown in FIG. 4 is operated in the direction of the arrow X, the machine advances to the left where the operator is sitting, and the travel lever 24
By operating in the direction of the arrow Y, it is possible to display the fact that the machine is proceeding to the right of the operator and make the operator recognize it.

Here, in FIG. 1, the dozer 18 is supported by an arm 28 which is vertically movable.
An angle sensor 29 such as a potentiometer is provided at the rotating portion of the. FIG. 9 shows a mounting panel portion of various operation levers 16, and a display panel 30 for a dozer position is provided. The display panel 30 is formed so that the height of the dozer 18 is displayed by a lamp based on the detection value of the angle sensor 29, so that the operator can accurately recognize the height of the dozer 18 during earth removing work. ..

10 and 11 show another embodiment in which the arm 31 of the excavator 15 has a double pipe structure. A lower arm 31b attached with a bucket 33 is slidably fitted onto an upper arm 31a pivotally attached to the tip of a boom 32, and fixed with bolts 34, 34. FIG. 10 shows the state in which the lower arm 31b is pulled up to the upper part of the upper arm 31a and the arm 31 is contracted. Normal excavation work is performed in this contracted state.

When a deep digging operation is performed, the bolts 34, 34 are loosened and the bucket cylinder 35 is extended, so that the lower arm 31 is extended as shown in FIG.
b to the lower part of the upper arm 31a so that the bolt 3
Fix with 4,34. Therefore, the arm 31 is in an extended state, and it becomes possible to perform deep digging work that cannot be performed with a normal arm length. Although not shown, the upper arm 31a may have a large diameter and be slidably fitted onto the lower arm 31b.

The present invention can be modified in various ways without departing from the spirit of the invention, and it goes without saying that the invention extends to the modified version.

[0021]

As described in detail in the above embodiments of the present invention, the traveling direction of the lower frame with respect to the upper frame is displayed on the display means provided on the traveling lever.
Therefore, no matter where the upper frame is turned, the operator can reliably recognize the traveling direction of the machine body when operating the traveling lever, and can prevent erroneous operation of the traveling lever.

Thus, even if there are obstacles or holes in the vicinity of the machine body, it is possible to avoid obstacles, etc., and move in other directions, contributing to improvement in safety and operability. it can.

[Brief description of drawings]

FIG. 1 is a side view of a microminiature work vehicle showing an embodiment of the present invention.

FIG. 2 is a plan view of a main part showing the arrangement of sensors.

FIG. 3 is a circuit diagram of a sensor.

FIG. 4 is a perspective view of a main portion of a traveling lever mounting panel.

FIG. 5 is a plan view showing an aspect of a positional relationship between a lower frame and an upper frame.

FIG. 6 is a plan view showing an aspect of a positional relationship between a lower frame and an upper frame.

FIG. 7 is a plan view showing an aspect of a positional relationship between a lower frame and an upper frame.

FIG. 8 is a plan view showing an aspect of a positional relationship between a lower frame and an upper frame.

FIG. 9 is a perspective view of a mounting panel for various operating levers.

FIG. 10 is a side view of a main part of an excavating device showing another embodiment.

FIG. 11 is a side view of the main parts showing the operating state of FIG.

[Explanation of symbols]

 20 Sensor 22 First Display Means 23 Second Display Means 24 Travel Lever 26 Lower Frame 27 Upper Frame

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Takeshi Mizumoto 1 Hachikura, Tobe-cho, Iyo-gun, Ehime Prefectural Engineering Department, Iseki Agricultural Machinery Co., Ltd. Technical Department Co., Ltd. (72) Inventor Kazushi Ochi No. 1 Yakura, Tobe Town, Iyo-gun, Ehime Prefecture

Claims (1)

[Claims] 1. In a civil engineering work vehicle in which an upper frame can freely rotate in a horizontal direction with respect to a lower frame, a sensor for detecting a positional relationship between the lower frame and the upper frame is provided, and the upper is detected based on a detected value of the sensor. A traveling monitor device characterized in that means for determining the traveling direction of the lower frame relative to the frame and displaying the traveling direction on the traveling lever are provided.