JPH04135838U - construction vehicle - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a construction vehicle that can control hydraulic equipment while checking the status of work such as digging holes, reduce the number of workers, and prevent accidents. [Configuration] Hydraulic equipment 25, 31, 3 mounted on vehicle 11
4 and 38 are controlled by reciprocating the control valve 54, the operation part 84 of the control valve 54 is connected to an air cylinder 49 connected to a compressed air source 59 and reciprocating the control valve 54, and a battery of the vehicle 11. 71 to control the flow of compressed air; Remote control unit 7 that controls power on/off
2, even if the remote control unit 72 is operated even if the vehicle 11 is located far away, the solenoid valves 61 and 62 will be activated.
is controlled to turn on and off, the flow of compressed air from the air compression source 59 to the air cylinder 49 is controlled, and the control valve 54 reciprocates, so that the hydraulic equipment 25, 31, 34,
38 operations can be controlled.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This invention drives the hydraulic equipment installed on the vehicle to extend and contract the boom, raise and lower, turn, and Concerning construction vehicles that lift objects and dig holes.

0002

[Conventional technology]

In conventional construction vehicles such as digging pole construction vehicles, hydraulic excavators, and aerial work vehicles, If the vehicle is equipped with hydraulic equipment such as hydraulic cylinders and hydraulic motors, and control valves. In addition, a lever operation section is provided, and this operation section is operated to drive the hydraulic equipment. are doing. That is, as shown in FIG. 10, a support shaft 2 is provided on the frame 1 of the operator's seat. An operating lever 3 is rotatably fitted onto a support shaft 2 of the holder. Control valve 4 is It is attached to the bottom of the frame 1, and the rod 5a of the spool 5 can be operated. It is connected to an arm 6 attached to the operating lever 3. For control valve 4 Three ports 4a, 4b, 4c are provided, and port 4a is connected to hydraulic pump 7. The port 4b is connected to a hydraulic device that extends and retracts the boom 8, such as a hydraulic cylinder for telescoping. The port 4c is connected to the port 9a of the cylinder 9, and the port 4c is connected to the port 9b of the telescopic hydraulic cylinder 9. It is connected to the.

0003 Then, when the operator sitting in the operating seat turns the operating lever 3 in the direction of arrow A, The spool 5 of the control valve 4 is moved in the direction of arrow B via the arm 6, Hydraulic oil sent from the hydraulic pump 7 is applied to ports 4a, 4b of the control valve 4. and is sent to the telescopic hydraulic cylinder 9 via the port 9a. This allows the expansion oil to The piston rod 10 of the pressure cylinder 9 rises, and the boom 8 connected to it extends. do. On the other hand, when the control lever 3 is rotated in the opposite direction of arrow A, the control The spool 5 of the roll valve 4 is moved in the opposite direction of arrow B, and the telescopic hydraulic cylinder The piston rod 10 of 9 is lowered, and the boom 8 is retracted. Similarly, although not shown, operate the corresponding control valve to control the swing hydraulic pressure. The motor is driven to rotate the boom 8, and the luffing hydraulic cylinder is driven to rotate the boom 8. Adjust the inclination angle of the winch and drive the winch's hydraulic motor to lift the item. The hydraulic motor for the auger is driven to rotate the auger and dig a hole. ing.

0004 In recent years, the capacity of hole-drilling pole-erecting vehicles has increased, and their performance has improved. Over a ditch or road far away from the parking location, or with an obstacle such as a fence in between. It is now possible to dig holes even in places where there is. What should be taken into consideration when digging holes is that there are gas pipes, water pipes, and electricity pipes under the road. There are many buried objects such as talking lines, so it is important not to damage them. During digging, the condition of the digging position is always checked visually or with a detector.

[0005] By the way, the hole digging position is located far from the operator's seat, so the operator cannot use the operating lever. It is not possible to monitor the condition of the hole while operating -3. Therefore, at the digging position A worker is assigned to monitor the condition of the hole, and an operator at the operator's seat is instructed by the worker to monitor the condition of the hole. operates the operating lever 3 to activate, for example, the telescopic hydraulic cylinder 9 and the luffing hydraulic cylinder. The hydraulic motor for hoisting the winch extends and retracts the boom 8 to adjust the luffing angle. The auger is rotated to dig the hole. We are doing some research.

[0006]

[Problem that the idea aims to solve]

In the above-mentioned construction vehicle, there is a worker who monitors the status of the work position and a worker who handles the operation section. Since an operator is required to operate the system, there is a problem in that a large number of workers are required. In particular, if there is an obstacle such as a fence between the parking position and the digging position, The operator at the position cannot see the operator at the operator's seat and transmit signals. subordinate Therefore, it is necessary to place one to three signal carriers along the way, which requires more personnel. Not only that, but it also takes time for signal transmission, for example, to stop digging work urgently. Even if necessary, there may be a time delay before the auger stops, causing There is a problem in that accidents that damage buried objects occur.

[0007] This invention was created in view of the above circumstances, and it is necessary to check the work status of digging holes etc. Hydraulic equipment can be controlled at the same time, reducing the number of workers and reducing accidents. To provide construction vehicles that can prevent

[0008]

[Means to solve the problem]

The construction vehicle of this invention has hydraulic equipment, control valves and controls on the vehicle. Equipped with a valve operating section, the operating section is operated to drive hydraulic equipment and extend the boom. For those that perform contraction, undulation, turning, lifting objects, and digging holes, the above-mentioned controller an operating portion of the control valve provided in the vehicle and connected to a compressed air source; It is powered by an air cylinder that reciprocates the valve and the vehicle's battery. a solenoid valve that controls the flow of compressed air supplied to the air cylinder; A remote control unit that is connected to the valves via long connection lines and controls the power supply and disconnection of these solenoid valves. It is characterized by its structure.

[0009]

[Effect]

The construction vehicle of the present invention connects the remote control part of the operation part to the solenoid valve via a long connection line. If you carry the remote control unit with you, you can control it remotely even if you are far away from the vehicle. By operating the control part, the solenoid valve is controlled to turn on and off, and air is supplied to the cylinder. The flow of compressed air is controlled and the control valve reciprocates, so hydraulic equipment is controlled.

0010

【Example】

The first embodiment in which the present invention is applied to a pit-drilling pole-erecting vehicle will be described below with reference to FIGS. 1 to 7. explain. First, in FIG. 5, a vehicle 11 is constructed by connecting a truck 13 to the rear of a driver's cab 12. Outriggers 14 are provided at the four corners of the truck 13. power take Off (hereinafter referred to as PTO) 15 is attached to the lower side of the driver's cab 12, and is connected to a hydraulic pump. The pump 16 and the hydraulic oil tank 17 are attached to the lower side of the truck 13. and, The power of the engine of the vehicle 11 is transmitted to the PTO 15 and is transmitted to the hydraulic port via the drive shaft 18. The pump 16 is rotated. The swivel base 19 is provided on the upper surface of the trolley 13. Although not shown, there is a hydraulic motor for swinging, which is a hydraulic device attached to the bottom part. The vehicle is rotated via a reduction gear.

[0011] The boom 20 is rotatably supported by a bracket 21 of the swivel base 19. this As shown in FIG. 1, the boom 20 includes a square cylindrical first boom 22 and a first boom 22. a second boom 23 slidably inserted into the interior of the boom 22; and a third boom 24 slidably inserted into the interior of the boom. hydraulic machine A powerful telescoping hydraulic cylinder 25 (see FIG. 1) is located inside the first boom 22. The lower end of the piston rod 26 is rotatably supported by the first boom 22 . The end portion is attached to the lower end portion of the second boom 23. And the second boom A pulley 27 is attached to the upper end of 23, and a steel cable 28 hung on this pulley 27 One end is attached to the upper end of the first boom 22, and the other end is attached to the third boom 24. It is attached to the bottom end of the. In addition, a pulley 2 is attached to the lower end of the second boom 23. 9 is attached, and one end of the steel cable 30 hung on this pulley 29 is connected to the first boom. 22, and the other end is attached to the lower end of the third boom 24. It is being The lower end of the luffing hydraulic cylinder 31, which is a hydraulic device, is rotated to the swivel base 19. The piston rod 32 is movably supported and the upper end of the piston rod 32 is attached to the first boom 22. It is being

0012 A connecting member 33 is attached to the upper end of the third boom 24. An auger hydraulic motor 34, which is a hydraulic device, is suspended from the member 33. Hydraulic motor The motor 34 has a reducer 35 built into its lower side, and the motor 34 is connected to the hole-digging machine via this. The gar 36 is rotated. The auger 36 is located at the tip of the rotating shaft 36a. A spiral part in which a blade part 36b is provided and a steel plate is spirally wound upward from this part. 36c is provided. The winch 37 is attached to the upper surface of the base of the first boom 22. The hydraulic equipment includes a hoisting hydraulic motor 38, a reducer 39, and a hoisting driver. The steel cable 41 wound around the hoist drum 40 is connected to the third block. It passes through the upper end of the arm 24 and is hung on a pulley (not shown) of a hook 42.

[0013] The operator seat 43 is provided on the swivel base 19. As shown in FIG. 3, the operator seat 4 Frames 44 are erected on both sides of the front surface of 3, and these frames 44 are connected together. A support shaft 45 is attached to the lower part of the support shaft. 5 operating levers A sleeve 47 is attached to the tip of each of the sleeves 46 by welding. By rotatably fitting the lever 47 to the support shaft 45, the five operation levers 46 can be operated. It is attached to the front of the operator seat 43. Additionally, a support shaft 45 is provided between the frames 44. A support shaft 48 is attached at the top.

[0014] The five air cylinders 49 have two ports 49a and 49b, and the upper end has a support shaft. 48, and the lower end of the piston rod 50 is connected to the corresponding sleeve. 47. Each sleeve 47 has A second arm 52 is attached at a position substantially perpendicular to the first arm 51. . Then, from the sleeve 47, the first arm 51 and the second arm 52, It constitutes the arm member 53.

[0015] The five control valves 54 (only one shown in FIG. 1) are of a well-known configuration. They are installed below the operator seat 43 in correspondence with the air cylinders 49, respectively, and A rod 55a of the rod 55 is connected to the second arm 52. These skits The roll valve 54 has three ports, and the central port 54a connects the connecting pipe 56. The ports 54b and 54c are connected to the hydraulic pump 16 through the connecting pipes 57 and 58. Connected to ports 25a and 25b of a hydraulic device, for example, a telescopic hydraulic cylinder 25, through the It is.

[0016] Although not shown, there are other hydraulic devices, such as a hydraulic motor for swinging and a hydraulic cylinder for luffing. The hydraulic motor 34 for auger and the hydraulic motor 38 for hoisting correspond to It is connected to ports 54b and 54c of the control valve 54 via connecting pipes. Ru. An air compressor 59 as a source of compressed air is attached to the swivel base 19, where the pressure is The compressed air is stored in the air tank 60.

[0017] The solenoid valves 61 and 62 are provided corresponding to each air cylinder 49, respectively. Both of them are composed of coils 63, 64 and valve bodies 65, 66. In the valve body 65 Three ports 65a, 65b, and 65c are provided, and port 65a is a connecting pipe. 67 to the air tank 60, and the port 65b is connected to the air tank 60 via the connecting pipe 68. It is connected to the port 49a of the air cylinder 49, and the port 65c is open to the atmosphere. . In addition, the valve body 66 is provided with three ports 66a, 66b, and 66c. 66a is connected to the air tank 60 via a connecting pipe 69, and the port 66b is connected to the connecting pipe 70 to the port 49b of the air cylinder 49, and the port 66c is connected to the atmosphere. It is open to the public. The coils 63 and 64 are both batteries included in the vehicle 11. 71, and when the coils 63 and 64 are energized, the ports 65a and 6 5b and ports 66a and 66b communicate with each other, ports 65c and 66c are closed, and the When power is cut off to the ports 63 and 64, ports 65a and 66a are closed, and port 65b is closed. and 65c, and ports 66b and 66c communicate with each other.

[0018] The remote control unit 72 shown in FIG. 4 includes a case 74 having a handle 73 and Five double-throw switches 75 (shown in Figures 1 and 2) are installed inside the base 74. (only one is shown) and an operation panel 76 attached to the front of the case 74. has been done. The operation panel 76 has five knobs 77a equipped with waterproof caps. , 77b, 77c, 77d, and 77e are attached. These knobs 77 a to 77e are for controlling hydraulic equipment by switching the corresponding switches 75; The knob 77a controls the hydraulic motor for boom rotation, and the knob 77b controls the hydraulic pressure for extending and retracting. The knob 77c controls the hydraulic cylinder 31 for luffing. The knob 77d controls the hydraulic motor 34 for the auger, and the knob 77e controls the hydraulic pressure for hoisting. The motor 38 is controlled. The operation panel 76 also includes an alarm device, such as a buzzer button. button 78a and a switch to release the coils 63, 64 from the battery 71 in case of emergency. A push button 78c is attached to operate the switch 78b.

[0019] The switch 75 is composed of a double-throw contact piece 75a and terminals 75b and 75c. As shown in FIG. The terminal 75b is connected to the positive terminal 71a of the coil via a long connecting wire 80. The terminal 75c is connected to one terminal 64a of the terminal 64 through the long connecting wire 81. It is connected to one terminal 63a of the coil 63. In addition, the other terminal of the coil 63 63b is connected to the negative terminal 71b of the battery 71 via a long connecting wire 82. The other terminal 64b of the coil 64 is connected to the battery 71 via a long connecting wire 83. It is connected to the negative terminal 71b. Then, the air cylinder 49 and the solenoid valve 6 1 and 62 and the remote control section 72 constitute an operation section 84.

[0020] Next, the operation of the present invention will be explained. First, at the parking position of the vehicle 11, Set outrigger 14. Then, start the engine of vehicle 11 and take the PTO1 5, the hydraulic pump 16 is operated. The worker 85 carries the remote control unit 72 and enters the hole. Move to digging position. Now, operate the knobs 77a, 77b, 77c, 77d, and 77e to adjust the hydraulic equipment. The procedure for controlling the control valve 54 will be explained below. The order is the same for all, so as a typical example, operate the knob 77b to turn the hydraulic cylinder for expansion and contraction. The case of controlling the driver 25 will be explained with reference to FIGS. 1 and 2.

[0021] Operate the knob 77b to bring the contact piece 75a of the switch 75 into contact with the terminal 75b. Then, the coil 64 is energized by the battery 71 and the solenoid valve 62 is activated. Ports 66a and 66b of the valve body 66 communicate with each other. There, the compressed air from the connection pipe 60 to the ports 66a and 66b of the valve body 66, and the connection pipe 70. Air is sent from the port 49b to the cylinder 49, and the piston rod 50 moves in the direction of arrow C. Move to. The air compressed by the movement of the piston rod 50 in the direction of arrow C is , since the solenoid valve 61 is in an inoperative state, the port 49a, the connecting pipe 68, and the valve body 65 are It is discharged into the atmosphere through ports 65b and 65c. The piston rod 50 is an arrow When the arm member 53 is moved in the C direction, the arm member 53 is rotated in the D direction. The spool 55 of the valve 54 moves in the direction of arrow E. Then, the hydraulic fluid is From the pump 16 to the connecting pipe 56, port 54a, port 54b, connecting pipe 57, port 2 5a into the hydraulic cylinder 25, and the piston rod 26 rises. child As a result, the second boom 23 rises and the third boom 23 is pulled by the steel cable 28. The boom 20 then extends by the same height.

[0022] When the knob 77b is returned to its original position, the contact piece 75a of the switch 75 is removed from the terminal 75b. They separate, and the coil 64 becomes de-energized. Then, compressed air flows into the air cylinder 49. Since the air supply is stopped, move the spool 55 of the control valve 54 in the direction of arrow E. The urging force to move the spool 5 in the direction is removed, and a return spring (not shown) causes the spool 5 to 5 moves in the opposite direction of arrow E and returns to its original position. Along with this, arm member 5 3 is rotated in the opposite direction of arrow D, and the piston rod 50 of the air cylinder 49 is also returned to its original position. Return to position. Then, the supply of hydraulic oil to the hydraulic cylinder 25 is stopped.

[0023] Also, touch the contact piece 75a of the switch 75 to the terminal 75c by operating the knob 77b. When the coil 63 is energized by the battery 71, the solenoid valve 61 is activated. Become. Then, the ports 65a and 65b of the valve body 65 are communicated with each other. Therefore, compression Air is supplied from the air tank 60 to the connecting pipe 67, to the ports 65a and 65b of the valve body 65, and to the connecting pipe 67. The air is sent to the cylinder 49 from the port 49a through the pipe 68, and the piston rod 5 0 moves in the opposite direction of arrow C. By moving the piston rod 50 in the opposite direction of arrow C, Since the solenoid valve 62 is inactive, the compressed air flows through the port 49a and the connection. It passes through the pipe 70 and ports 65b and 65c of the valve body 65 and is released into the atmosphere. fixie When the rod 50 moves in the direction opposite to arrow C, the arm member 53 rotates in the direction opposite to arrow D. As a result, the spool 55 of the control valve 54 moves in the opposite direction of arrow E, and the operation is started. Hydraulic oil flows from the hydraulic pump 16 to the connecting pipe 56, port 54a, port 54c, and connecting pipe 5. 8. It is sent into the hydraulic cylinder 25 through the port 25b and the piston rod 26 is lowered. descend. As a result, the second boom 23 descends, and the third boom 23 lowers the steel cable 30. The boom 20 is pulled down by the same height and retracted.

[0024] In addition, operate the knob 77a to bring the contact piece 75a of the switch 75 into contact with the terminal 75b. When the boom is activated, the corresponding solenoid valves 61, 62 and air cylinder 49 are controlled When the hydraulic motor for turning rotates in the forward direction and contacts the contact piece 75a with the terminal 75c, , the hydraulic motor for boom rotation rotates in the opposite direction. Operate the knob 77c to bring the contact piece 75a of the switch 75 into contact with the terminal 75b. Then, the luffing hydraulic cylinder 31 operates to increase the inclination angle of the boom 20, When the contact piece 75a is brought into contact with the terminal 75c, the luffing hydraulic cylinder 31 moves to the boom 20. operates to reduce the angle of inclination. Operate the knob 77d to bring the contact piece 75a of the switch 75 into contact with the terminal 75b. Then, the auger hydraulic motor 34 rotates in the forward direction, connecting the contact piece 75a to the terminal 75c. When touched, the auger hydraulic motor 34 rotates in the opposite direction. Also, touch the contact piece 75a of the switch 75 to the terminal 75b by operating the knob 77e. Then, the hoisting hydraulic motor 38 causes the winch 37 to enter the hoisting state. When the contact piece 75a contacts the terminal 75c, the winch 37 unwinds and unwinds. Rotate it so that it is in the same state.

[0025] Now, the worker 85 who has moved to the digging position presses the knob 77a of the remote control unit 72. Operate to rotate the boom 20, and operate the knob 77b to extend and retract the boom 20. , operate the knob 77c to adjust the luffing angle of the boom 20 and raise the auger 36. Set it in the digging position (see Figure 6). After setting the auger 36 to the digging position, the operator 85 installs a detector (not shown). After confirming the condition of underground objects using the remote controller, turn the knob 77d of the remote control unit Operate to rotate the auger hydraulic motor 34 in the forward direction and rotate the auger 36. Then, dig a hole. During this time, the worker 85 constantly monitors the condition of the hole 86 that has been dug. If there is no abnormality, continue digging, and if an abnormality is found, immediately remove it. Return the knob 77d to its original position to stop the auger hydraulic motor 34 and check for abnormalities. Eliminate the cause. Once hole 86 has been dug, secure auger 36 to boom 20 and turn knob 7. 7e to drive the winch 37 to pull up the utility pole 87 and make it vertical. , and stand it up in the hole 86 while gradually lowering it (see Figure 7).

[0026] According to the above embodiment, if the worker 85 carries the remote control unit 72, he or she can move away from the vehicle. By operating the remote control unit 72, you can change the working position for digging holes etc. Since the hydraulic equipment can be controlled while checking the status of the There is no need to place the author, and there is no need to place an obstacle such as a fence between the vehicle 11 and the digging position. Even if there is, there is no need for personnel for signal transmission, so the number of workers can be reduced. In addition, if an abnormality is discovered during work, the work can be stopped immediately, so buried objects can be It is possible to prevent accidents that could result in damage to the equipment.

[0027] Figure 8 shows a second embodiment in which the present invention is applied to a hydraulic excavator vehicle. The difference from the embodiment is that a swivel base 89 is rotatably provided on the vehicle 88. This swivel table Reference numeral 89 is an arm that is rotated by a hydraulic motor (not shown), and a first arm 90 is attached to this. is rotatably provided, and a second arm 91 is rotatably attached to this first arm 90. A third arm 92 is rotatably provided on the second arm 91, and a third arm 92 is rotatably provided on the second arm 91. A bucket 93 is rotatably provided on the arm 92, and a bucket 93 is provided between each arm and A hydraulic cylinder 94 is provided between the arm 92 and the bucket 93. In this embodiment as well, the worker 85 carrying the remote control unit 72 controls the hole being excavated. It is possible to proceed with work while monitoring the status of 95, and the same effect as in the first embodiment is achieved. play.

[0028] Figure 9 shows a third embodiment in which the present invention is applied to an aerial work vehicle. The difference from the example is that a bucket 96 is attached to the tip of the third boom 24 of the boom 20. It is something that Also in this embodiment, the worker 85 carries the remote control unit 72. If you ride the bucket 96, you can move to a high place where you can work, so it is the same as in the first embodiment. It has similar effects. The present invention is not limited to the embodiments described above and shown in the drawings. Various changes are possible without departing from the above.

[0029]

[Effect of the idea]

The construction vehicle of this invention has hydraulic equipment, control valves and controls on the vehicle. A device that is equipped with a valve operating section and operates the operating section to drive hydraulic equipment. and the operation section is provided in the vehicle and reciprocates the control valve. Controls the flow of compressed air driven by an air cylinder and the battery of the vehicle. It consists of solenoid valves and a remote control unit connected to these solenoid valves via long connection lines. This makes it possible to operate the portable remote control unit even when you are away from the vehicle. This allows you to control the hydraulic equipment while checking the status of the work position, and saves the number of workers. It has the excellent effect of reducing the number of accidents and preventing the occurrence of accidents. be.

[Brief explanation of drawings]

FIG. 1 is a diagram illustrating the general configuration of an operating section.

FIG. 2 is a diagram illustrating the general configuration of the operating section in an operating state.

FIG. 3 is a perspective view showing how the air cylinder is installed.

FIG. 4 is a perspective view of the remote control unit.

[Figure 5] A perspective view of a hole-digging pole-erecting vehicle.

[Fig. 6] A side view of the hole-digging pole-erecting vehicle in the digging state.

[Fig. 7] A side view of the hole-digging pole-erecting vehicle in a state where the utility pole is erected.

FIG. 8 is a front view of a hydraulic excavator in a working state showing a second embodiment.

FIG. 9 is a side view of the aerial work vehicle in a working state showing the third embodiment.

FIG. 10 is a diagram corresponding to FIG. 1 in a conventional example.

[Explanation of symbols]

11 Vehicle 20 boom 25 Telescopic hydraulic cylinder (hydraulic equipment) 31 Hydraulic cylinder for luffing (hydraulic equipment) 34 Hydraulic motor for auger (hydraulic equipment) 38 Hydraulic motor for hoisting (hydraulic equipment) 49 Air cylinder 54 Control valve 59 Air compressor (compressed air source) 61,62 Solenoid valve 71 Battery 72 Remote control unit 79, 80, 81, 82, 83 Long connection wire 84 Operation section 88 Vehicle 94 Hydraulic cylinder (hydraulic equipment)

Claims (1)

[Scope of utility model registration request] Claim 1: A vehicle is equipped with a hydraulic device, a control valve, and an operating section for the control valve, and the operating section is operated to drive the hydraulic device to extend and contract a boom, raise and lower, turn, lift objects, and dig holes. In one embodiment, the operating part of the control valve is connected to an air cylinder provided in the vehicle and connected to a compressed air source to reciprocate the control valve, and a compressed air cylinder driven by a battery of the vehicle and supplied to the air cylinder. A construction vehicle comprising: a solenoid valve that controls air circulation; and a remote control unit that is connected to these solenoid valves via a long connection line and controls the solenoid valves to be turned on and off.