JPS5945534B2 - steel slag transport vehicle - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a steel slag transport vehicle for transporting steel slag in a steel mill or the like.

Generally, in a steelworks, a dedicated steel slag transport vehicle is used to transport the generated steel slag to collect and process the steel slag in one place.

The steel slag transport vehicle has arms rotatably supported at the base ends thereof by horizontal pivots at the rear of both sides of the vehicle, and holds a pot body loaded with steel slag at the tip of the arm. ,moreover,
The arm is provided with a hook that engages with a lower part of the pot body,
By rotating the arm back and forth, the pot body is loaded and unloaded onto the chassis, and at the same time, the arm is rotated while the hook and the pot body are engaged, and the pot body is turned in half to discharge the steel slag. There are some that are configured to do so.

In the above-mentioned steel slag transport vehicle, when discharging steel slag, the pot body begins to rotate half a turn from the state where it is lifted from the chassis, and as the arm rotates, the pot body also rotates continuously, and the arm rotates backward. Once the movement is complete, the pot body will be completely turned in half.

Therefore, the steel slag will be discharged sequentially as it descends from the vertical position of the arm, that is, the state where the pot body is located at the highest point above the ground, and the steel slag will be discharged from a higher place farther from the ground. Therefore, the steel slag is scattered during this process, which is very dangerous, and there are problems in that it takes time and effort to collect the scattered steel slag.

The present invention has been made in view of this point, and is designed so that when the arm is rotated backward to discharge steel slag, the pot body is moved close to the ground, and then the pot body is rotated half a turn. This provides a steel slag transport vehicle that prevents steel slag from scattering.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The configuration of the present invention will be described below with reference to the drawings.

As shown in FIGS. 1 and 2, reference numeral 1 denotes a steel slag transport vehicle, on which an installation stand 3 is fixedly installed, and a pot body 4 loaded with steel slag is mounted on the installation stand 3. The pot body 4 is placed in such a manner that it can be loaded and unloaded, and the pot body 4 has pot body support shafts 5, 5 protruding from the upper side and a hook engagement pin 6.6 from the lower portion.

At the lower part of the rear end of the vehicle chassis 2, there are provided jack cylinders 1, 1 for supporting the vehicle chassis 2, and on both sides of the rear end, a pair of arms 8, 8 are provided with pivot shafts provided laterally at their base ends. It is rotatably supported by 9.

The arm 8 is used to hold the pot body 4 in order to load and unload the pot body 4 and to turn it half-way, and has a concave curved engagement in the shape of a cam surface with which the pot body support shaft 5 of the pot body 4 engages at the tip. A portion 10 is provided, and an extension portion 11 is provided protruding from the vicinity of the concave curved engagement portion 10, and the concave curved engagement portion 10 is formed to be long in the front-rear direction.

An arm actuating cylinder 12.12 is connected between the central front surface of the arms 8, 8 and the vehicle chassis 2, and the arms 8, 8 move back and forth as the arm actuating cylinder 12.12 expands and contracts.

A horizontal horizontal shaft 13 is rotatably provided between the ends of the extension parts 11, 11 of both arms 8.8, and a first crank arm 14° 14 is attached to the horizontal horizontal shaft 13 on the inside of the arms 8, 8. ,
Second crank arms 15, 15 are fixed on the outside at one end, respectively, to form a crank, and the first crank arms 14, 14 have stoppers 1γ, 1γ having hooks 16, 16 at their proximal ends. A tension spring 18, 18 is connected between the proximal ends of the hooks 17, 17 and the first crank arms 14, 14, and the hook 1
6 engages with the hook engaging pin 6 of the pot body 4.

The second crank arms 15, 15 include the arms 8,
The rods 19c, 19c of latching tool operating cylinders 19, 19 connected to 8 are rotatably connected, and the latching tool 11 is moved by the expansion and contraction movement of the latching tool operating cylinder 19.

Note that 20 is a hook support link that supports the hook 16 so that it does not fall when the arm 8 rotates rearward. 2 and are rotatably connected to each other.

A hydraulic circuit 21 is connected to each of the cylinders 7, 12, 19, as shown in FIG. , 8, the pot body 4 moves horizontally due to its own weight.

The half-rotation of the pot body 4 is temporarily stopped, and the arm operating cylinder 12.12 is connected to the front ports 12a, 12.
a and rear ports 12b, 12b are counterbalance valves 2
2.24, the pilot line 22a of both counterbalance valves 22, 24 is connected to the directional valve 23;
24a is connected to the directional control valve 23 side of the other counterbalance valve 22.24.

a front port 19a of said latch actuation cylinder 19.19;
19a is a directional control valve 2 via a flow control valve 25 with a check valve.
6, the rear ports l'19b, 19b are connected to the directional control valve 26 via the pressure control circuit 21, and further the rear ports 19
b.

19b is a pilot type stop valve 28 and check valve) 29
The pilot type stop valve 28 has a pilot line 28a connected to the directional control valve 26 side of the pressure control circuit 21 and is closed by pilot pressure.

The pressure control circuit 21 is provided with two check valves 30 and 31 in parallel, and both check valves 30 and 31 are provided so as to flow in opposite directions, and the check valve 30 is directional. The valve 26 is for preventing the piston rod 19c from elongating due to the back pressure generated from the discharge passage 40 when in neutral; and the check valve 31 is for preventing the piston rod 19G from shrinking due to the weight of the latching tool 11. It is for the purpose of

Said jack cylinders γ,1 are each separately connected to a directional valve 32.32, the front ports 7a, 7a of said jack cylinder γ,1 are directly connected to the directional valve 32.32, and the rear ports 7b, 7b are connected directly to the directional valve 32.32. The pilot lines 33a, 3 of the pilot-operated check valves 33, 33 are connected to the directional control valve 32.32 via the pilot-operated check valves 33, 33.
3a is connected to front ports γa, γa.

Each of the directional switching valves 23, 26, 32, 32 is a pump 34.
A supply path 35 having a
0 is connected, and the directional switching valve 23 that controls the arm actuation cylinder 12. is a closed center type, and is provided with manual levers 41, 42, 42 and springs 43, 44, 44, and the directional switching valve 26 that controls the latch actuating cylinder 19, 19 is a 4-point/3-position switching valve. , the neutral position is in the form of a pressure port block, and the manual lever 45
and a spring 46 are provided, so that in the neutral position of the directional control valve 26 the latch actuating cylinders 19, 19 are connected to the rod 1.
9c and 19c are connected by piping so as to be movable in the contraction direction.

Next, to explain the operation, when stacking the pot bodies 4 on the installation stand 3, as shown in FIG. When the arms 8, 8 are rotated backward and the pot body support shafts 5, 5 are engaged with the concavely curved engaging portions 10, 10, and the arms 8, 8 are rotated forward, the pot is rotated along with the rotation of the arms 8°8. The body 4 is moved and placed on the installation table 3.

Moreover, when unloading the pot body 4, the above operation may be performed in reverse.

Next, when discharging the steel slag from the pot body 4, as shown in FIG. 3, the directional control valve 26 is operated to extend the latch operating cylinder 19, 19, and the latch 1γ is removed.

1γ forward to engage the hook engagement pin 6.6 with the hook 16.16, return the rear direction switching valve 26 to the neutral position, and then operate the direction switch valve 23 to move the arms 8, 8 backward. When the pot body 4 is rotated, the pot body 4 starts to rotate while maintaining its horizontal state as the arms 8, 8 rotate.

At that time, since the directional control valve 26 is in the neutral position, the oil in the latch actuating cylinder 19.19 flows out from the rear ports 19b, 19b due to the weight of the pot body 4, and the pilot type stop valve 28 and reverse Front port 19a via stop valve 29.

19a, surplus oil corresponding to the volume of the piston rod 19c flows into the oil tank 39 through the check valve 31, the directional control valve 26, and the discharge passage 40, and the latch actuating cylinder 19.19 contracts, causing the hook to close. Hook 16 engaged with engagement pin 6°6.
16 moves in the distal direction by the stroke of the latch actuating cylinder 19.19, and during this period, the pot body 4 temporarily moves horizontally as the arms 8, 8 rotate without making a half turn.

Subsequently, when the arms 8, 8 are rotated to the position shown by the solid line in FIG. 4, the rotation of the arms 8, 8 is stopped, and the directional control valve 26 is operated again to operate the latch again. cylinder 1
9, 19 are extended, and the pot body 4 is turned in half to discharge the steel slag, as shown by the dashed line in FIG.

As described above, according to the steel slag transport vehicle of the present invention, when the arm is rotated to discharge steel slag, the hook engaged with the hook engagement pin of the pot body moves toward the tip due to the weight of the pot body. As the arm rotates, the pot body temporarily stops rotating half a turn and moves close to the ground, and then rotates half a turn, so the discharged steel slag is scattered. The work can be carried out safely, and furthermore, since the steel slag does not scatter, there is no need to collect the steel slag, which greatly simplifies the work.

[Brief explanation of the drawing]

The drawings illustrate embodiments of the present invention, and FIG. 1 is a side view of the steel slag transport vehicle showing the loading and unloading of pot bodies, FIG. 2 is a plan view of the same with some parts omitted, and FIG. The figure is a side view of the hook and the hook engaging pin when they are engaged, with some parts omitted;
FIG. 5 is a side view of the steel slag discharged with some parts omitted from the drawings, and FIG. 5 is a hydraulic circuit diagram. 1... steel slag transport vehicle, 2... chassis, 4...
・・・・・・Pot body, 5...Pot body support shaft, 6...
...Hook engagement pin, 8...Arm, 9...
... Pivot, 10... Concave engaging portion, 11...
...Extension part, 12...Arm operating cylinder 2゛, 13...Horizontal horizontal axis, 14...First crank arm, 15......No. 2 crank arms,
16... Hook, 1γ... Hanging tool, 1
9... Latch actuation cylinder, 19C...
- Piston rod, 21... Hydraulic circuit, 23.
26, 32... Directional switching valve, 2γ...
Pressure control circuit.

Claims (1)

[Claims] 1 The pot body, which is placed on the chassis so that it can be loaded and unloaded, has a pot body support shaft on the top and a hook engagement pin protruding from the bottom, a pivot shaft installed laterally at the rear of the chassis, and a cam at the tip. A pair of arms having a planar concave engaging portion and an extension portion protruding from the vicinity of the concave engaging portion are rotatably supported on both sides by the pivot shaft, and are attached to the concave engaging portion. The pan body support shaft is engaged, an arm actuating cylinder is connected between the arm and the chassis, so that the pan body can be freely loaded and unloaded onto the chassis by the arm, and a horizontal horizontal shaft is rotated at the tip of the extension part. A first crank arm and a second crank arm are fixed to the horizontal horizontal axis to form a crank, and a hook having a hook at the tip of the first crank arm is attached to the second crank arm. The ronds of the latch actuation cylinders connected to the arms are respectively rotatably connected, the hooks are engaged with the hook engagement pins of the pot body, and the latch actuation cylinders are connected to a hydraulic circuit. is connected, the hook is moved toward the tip by the hydraulic circuit, and when the pot body rotates in half with the rotation of the arm, the rotation of the pot body temporarily stops due to horizontal movement due to its own weight. A steel slag transport vehicle characterized by: