JPH0818507B2 - Container handling vehicle - Google Patents

Description

TECHNICAL FIELD The present invention relates to a container loading and unloading vehicle for loading and unloading a container while maintaining a horizontal posture by a loading arm.

<Prior Art> Conventionally, there is a container handling vehicle as shown in FIG. In this container handling vehicle 145, subframes 147, 147 made of channel steel are mounted on a chassis frame 146 in the front-rear direction in parallel with each other and with the groove portions facing inward. A column device 151 is provided on the subframes 147, 147 so as to be movable in the front-rear direction indicated by arrow X. The column device 151 slides along the upper sides of the sub-frames 147, 147 with the upper sides of the sub-frames 147, 147 sandwiched from the upper and lower sides by slide pads 152, 152. The column device 151 includes a pair of columns 155, 155 made of channel steel, and the lower ends of the columns 155, 155 are connected by a bottom plate (not shown). And this bottom plate is the subframe 14
The sprocket 156, 157 provided on the front and rear of the chassis frame 146 is fixed between the 7, 147 and the chain 158. Front sprocket 157 is chassis frame 1
46 A hydraulic motor 159 provided at the front portion is directly driven. Therefore, this hydraulic motor 159
By operating the chain 158 by the column device 151, the column device 151 can freely move in the front-back direction indicated by the arrow X.

On the other hand, on the rear surfaces of the columns 155, 155, the carrier-side upper connecting member 161 and the carrier-side lower connecting member 9 serve as cargo handling arms.
1 is provided so as to be vertically movable as indicated by an arrow Z. The carrier-side upper connecting member 161 has columns 55, 5 by rollers 164, 164, 164, 164 provided at four corners of a U-shaped flat plate 162.
You can run up and down along 5. The hook 163 is fixed to the center of the flat plate 162. Inside the columns 155, 155, hydraulic cylinders 171 (only one side is shown) are installed opposite to each other on the left and right sides.
The tip of the piston rod 171a is connected by a shaft 181, and sprockets 182, 182 and rollers 183, 183 are attached to both ends of the shaft 181, respectively. The rollers 183, 183 roll in the grooves of the columns 155, 155, and each piston rod 171a
Guide the up and down movement of. Further, chains 184, 184 fixed to one end of the tube of the hydraulic cylinder 171 are wound around the sprockets 182, 182 and hung downward, and are connected to the U-shaped flat plate 162 of the upper connecting member 161. Therefore, the piston rod 171a of each hydraulic cylinder 171 can be extended to pull up the upper connecting member 161 by the chains 184, 184, and by contracting the piston rod 171a of each hydraulic cylinder 171, the upper connecting member 161 can be retracted.
Can be lowered by its own weight. The carrier-side lower connecting member 191 has a pair of clevis 195, 195 facing rearward in the center of a member 192 bent in a U shape so as to cover the rear and side surfaces of the columns 155, 155. A pin 196 that can be inserted into the clevis 195, 195 is attached to the member 192 by a wire. The lower connecting member 191 is a pair of hydraulic cylinders 197 provided on the sides of the columns 155, 155.
The lower connecting member 191 can be driven in either the up or down direction by connecting to the tip of a piston rod 197a (only one side is shown) and operating each hydraulic cylinder 197. Further, the hydraulic motor 159 and the hydraulic cylinders 171 and 197 are respectively provided with control valves for controlling these operations. Oil is supplied from a hydraulic pump provided in the middle portion of the chassis frames 146, 146 through hydraulic pipes (not shown) via the control valves, and the control valves are operated to drive them independently of each other.

When loading a container into the container handling vehicle 145, first, as shown in FIG. 10 (a), the carrier-side connecting member 161 and the container-side upper connecting member 111 provided at the front of the container 101 are connected, The carrier-side lower connecting member 191 is connected to the container-side lower connecting member 116 provided at the front of the container 101 so as to be movable up and down. At this time, the piston rod 171a of the hydraulic cylinder 171 contracts,
On the other hand, the piston rod 191a of the hydraulic cylinder 191 is assumed to be extended. Then, as shown in FIG. 10 (b),
By extending the piston rod 171a of the hydraulic cylinder 171, the carrier-side upper connecting member 161 and the container-side upper connecting member 111 are raised to raise the front part of the container 101, while the carrier-side lower connecting member 191 and the container-side lower connecting member are connected. Allow the member 116 to rest against the ground. Then, the container-side lower connecting member 116 is lowered relative to the container body 102, and its movement is transmitted by the chain 121 to cause the supporting member 103 to project downward and raise the rear portion of the container 101. That is, the front part and the rear part of the container 101 are synchronized and lifted horizontally. When the main girder 132 provided on the lower surface of the container 101 reaches substantially the same level as the sub-frame 147, the hydraulic motor 159 shown in FIG. 9 is driven as shown in FIG. 10 (c). Then, the column device 151 is moved forward through the chain 158 to horizontally move the container 101 (the rear portion of the container 101 is supported by the roller 107 at the lower end of the support member 103). Then, when the loading is completed, as shown in FIG.
By contracting the piston rod 197a of the carrier side lower connecting member 191 and the container side upper connecting member 116.
And the support member 103 is raised via the chain 140. Note that when the container 101 is unloaded from the vehicle 145, it is operated in the opposite manner to that described above.

<Problems to be Solved by the Invention> By the way, the conventional container cargo handling vehicle 145 described above has a hydraulic cylinder 171 for vertically moving the carrier-side upper coupling member 161.
And hydraulic cylinder that moves the carrier side lower connecting member up and down
A control valve is provided in each of 191 and 191 so that they can be driven independently of each other. Therefore, for example, when the container is unloaded, the container 101 shown in FIG.
Although the operator should operate the control valve of the hydraulic cylinder 171 after stopping the operation of the control valve of the hydraulic motor 159 when lowering it like the container 101 shown in FIG. The control valve may be operated. At this point, the piston rod 191a of the hydraulic cylinder 191 is in an expanded state, and the piston rod 191a of the hydraulic cylinder 191 is driven in the opposite contracting direction due to the erroneous operation. In this case, the carrier-side lower connecting member 191 rises and the support member 3 contracts into the rear column 5, and as a result, the rear portion of the container 101 is lowered and the container 101 is inclined while the front portion of the container 101 is raised. . Because of this, container 1
There is a problem that the load in 01 tilts and falls.

Therefore, an object of the present invention is to operate the fluid cylinder erroneously by controlling the carrier-side upper connecting member fluid cylinder and the carrier-side lower connecting member fluid cylinder with a single control valve with a simple structure. Another object of the present invention is to provide a container loading / unloading vehicle in which the container is prevented from tilting to prevent the load in the container from falling.

<Means for Solving the Problems> In order to achieve the above object, the present invention provides a column device provided on a subframe mounted on a chassis frame so as to be movable back and forth, and a column device provided on the column device so as to be movable vertically. A carrier-side upper connecting member detachably connected to the container-side upper connecting member, and a carrier-side lower connecting member detachably connected to the container-side lower connecting member that is vertically movable in the column device. , A lift chain having one end fixed to the carrier-side upper connecting member and the other end fixed to a column device, a lift sprocket having the lift chain wound upward, and the lift sprocket vertically moved by expansion and contraction of a piston rod. A second fluid cylinder that vertically moves the carrier-side lower connecting member by expanding and contracting a piston rod In a container-loaded vehicle equipped with a fluid cylinder, a pipe for connecting the first fluid cylinder and the second fluid cylinder in parallel and a flow of fluid in a direction in which the first fluid cylinder and the second fluid cylinder are simultaneously expanded or contracted. One control valve for switching and a sub sprocket provided in the first fluid cylinder moving part are wound from below, one end is fixed to the upper part of the column device, and the other end is fixed to the carrier side upper connecting member. A sub-chain, the first fluid cylinder and the second fluid cylinder both operate to extend or contract, and a container is mounted on the vehicle body, and a carrier-side upper portion connected to the container-side upper connecting member. When the connecting member is in the raised position and the carrier-side lower connecting member is in the lowered position, the first and second fluid cylinders are extended. Alternatively, when the control valve is switched to operate in the other direction of contraction, the operation of the first fluid cylinder is restrained by the sub-chain via the sub-sprocket and the carrier-side upper connecting member is stopped at the raised position. It is characterized by doing so.

<Operation> Containers are loaded as follows.

Now, for example, it is assumed that the carrier-side upper connecting member descends and the carrier-side lower connecting member also descends due to contraction and expansion of the first and second fluid cylinders, respectively.

With the column device at the rear of the vehicle and the container-side upper connecting member and the carrier-side upper connecting member, and the container-side lower connecting member and the carrier-side lower connecting member connected, respectively, first, operate the control valve to control the fluid flow. The flow is switched to simultaneously extend the first fluid cylinder and the second fluid cylinder. Then, as in the conventional case, the front part of the container is lifted by the carrier side upper connecting member via the lift chain and the lift sprocket, while the rear part of the container is lifted by the protrusion of the supporting member and the container is lifted while keeping the horizontal state. It becomes a state. At this point, the column device is moved forward relative to the sub-frame to horizontally move the container on the sub-frame. After this horizontal movement is completed, the control valve is operated to switch the flow of fluid in a direction in which the first fluid cylinder and the second fluid cylinder are simultaneously contracted. Then the first
The fluid cylinder is constrained by the sub-chain via the sub-sprocket and kept in the extended state, and the lift chain does not come off from the lift sprocket. Meanwhile, the second
The fluid cylinder contracts without any restraint so that the support member at the rear of the container contracts into the rear column.

Next, when the container is unloaded from the vehicle, after the operation of moving the column device relatively rearward with respect to the subframe, the support member is lowered, and then the control of both fluid cylinders is performed at the time of lowering the container. The valve is operated. Since the weight of the container is applied to the first fluid cylinder, the first fluid cylinder contracts and the container descends before the second fluid cylinder. At this time, since there is only one control valve for both cylinders, there is no chance that the other fluid cylinder is erroneously operated as in the case where there are two conventional control valves. Therefore,
The container is prevented from tilting and the cargo in the container is prevented from falling.

<Example> Hereinafter, the container handling vehicle of the present invention will be described with reference to Examples.

FIG. 1 shows a container loading vehicle (hereinafter referred to as a “carrier”) 45 according to an embodiment of the present invention with a container 1 loaded therein.

As shown in FIG. 2, the carrier 45 has subframes 47, 47 made of channel steel mounted on a chassis frame 46 in the front-rear direction in parallel with each other and with the groove portions facing inward. A column device 41 is provided on the subframes 47, 47 so as to be movable in the front-rear direction indicated by arrow X. FIGS. 4, 5, and 6 show the column device 51 as viewed from the side, the rear, and the front, respectively. This column device
The reference numeral 51 slides along the upper sides of the side frames 47, 47 by sandwiching the upper sides of the side frames 47, 47 from above and below via slide pads 52, 52 with channel steels 53, 53, respectively. The column device 51 has H-shaped steel 53, 53
A pair of columns 55 made of shaped steel are provided on the left and right, and the upper end is top plate 70.
And the lower ends are connected by a bottom plate 80 as shown in FIG. Also, the bottom plate 80 on the front side of the column 55
The hydraulic motor 59 is provided on the upper side, and the sprocket 57 is provided on the rotary shaft of the hydraulic motor 59, while the sprockets 54 and 56 are provided immediately below the bottom plate 80, that is, at the front and rear positions of the sprocket 57 at the level of the upper side of the subframe 47. ing.
Then, one chain 58 is stretched over the three sprockets 54, 56 and 57. The chain 58 has one end 58
a is the central part 49 of the plate 49 that connects the front ends of the subframes 47, 47.
It is fixed to a and is bent upwards by the sprocket 54 from the front-rear direction through the space between the sub-frames 47, 47, bent downward and backward by the sprockets 57, 56, respectively, and further connects the rear ends of the sub-frames 47, 47. It is bent by the shaft 48, and the other end 58b is attached to the central portion 46a at the rear end of the chassis frame 46.
Is fixed. The groove width of the subframes 47, 47 is chain 5
The minimum width that can pass 8 is set so that the overall height of the carrier 45 is low. By driving the hydraulic motor 59 in either rotation direction, the column device
The 51 can be freely moved forward or backward along the chain 58.

On the other hand, carrier-side upper connecting members 61 and carrier-side lower connecting members 91 are provided at the rear portions of the columns 55, 55 so as to be vertically movable as indicated by arrow Z. The carrier-side upper connecting member 61 is attached to a pair of plates 62, 62 having an L-shaped cross section, which are vertically connected by horizontal rods 66, 88, and a horizontal rod 67 connecting the central portions of the horizontal rods 66, 88. The clevis 63 is provided with a connecting pin 65 that penetrates both sides of the clevis 63 and can be connected to the clevis 63, and a pair of left and right arms 68 and 68 and operating pins 69 and 69. The clevis 63 is attached with the recess facing backward. Further, one end of the arm 68 is rotatably attached to a shaft 68a provided on the vertical rod 67, while the other end of the arm 68 is provided with a connecting pin 65 and an operating pin 6 at a substantially central portion.
Each upper part of 9 is attached so as to be rotatable and have play in the longitudinal direction of the arm 68. The connecting pin 65 has a shaft 68a when the operating pin 69 is not pressed upward by a rod 92 of the carrier-side lower connecting member 91, which will be described later.
While the arm 68 is rotated by its own weight with the fulcrum as a fulcrum to connect the clevis 63, the carrier-side upper connecting member 61 and the carrier-side lower connecting member 91 abut vertically, and the operating pin 69 is moved upward by the rod 92. When pressed, this action releases the clevis 63 upward to release the connection.

Inside the columns 55, 55, a pair of hydraulic cylinders 71,
71 is erected by fixing the lower end of the tube to the bottom plate 80 with a pin 74,
The upper ends of the piston rods 71a, 71a of the hydraulic cylinders 71, 71 are connected by a member 75, and lift sprockets 82, 82 are attached to both ends of the member 75, respectively. Further, a pair of support members 73, 73 are vertically attached to the substantially center of the member 75, and a sub sprocket 86 is attached between the lower ends of the support portions 73, 73. A pair of lift chains 8 fixed near the lower end 81 of the tubes of the hydraulic cylinders 71, 71.
4, 84 are wound around the lift sprockets 82, 82 and hung down, and both ends of the horizontal rod 88 of the carrier-side upper connecting member 61 are suspended.
On the other hand, while being connected to 88a, 88a, a sub chain 85 fixed to the central portion 70a of the top plate 70 is wound around the sub sprocket 86 and extended upward to be coupled to the central portion 88b of the lateral rod 88. Therefore, when the piston rod 71a of the hydraulic cylinder 71 is extended, the lift sprockets 82, 82,
The member 75, the support members 73, 73, and the sub sprocket 86 can be integrally raised, and the carrier chain upper connecting member 61 can be pulled up by the lift chain 84. When the piston rod 71a of the hydraulic cylinder 71 is contracted, the carrier-side upper connecting member 61 can be lowered by its own weight. The carrier-side connecting member 61 is the plate 62.
Rollers 64 attached to the sides of the left and right columns 55
Between them, it is possible to travel up and down along the inner groove of the column 55.

On the other hand, the carrier-side lower connecting member 91 includes a pair of side plates 97, 97 for covering the side surfaces of the column 55, a pair of upper and lower rods 92, 93 for horizontally connecting the side plates 97, 97, and the rods 92, 93. It has a clevis 95 attached in the center. Further, a pair of rotating pieces 203, 203, a torsion spring 204 as an elastic member, and a pair of lock pieces 205, 205 are attached to the clevis 95. The clevis 95 is attached with its U-shaped concave portion directed rearward and horizontally so that its tip projects. The lock piece 105 is allowed to freely rotate around a shaft 95b provided at the upper end of the clevis 95, and hangs down in the vertical direction by its own weight so that at least a part of the recess of the clevis 95 can be closed. The rotating pieces 203, 203 are made of a substantially L-shaped plate, and a portion corresponding to the short side of L is attached to a shaft 95a provided near the connecting rod 92 on the upper side of the clevis 95. Then, the rotating pieces 203, 203 are provided with a connecting plate 209 for connecting the long sides of the left and right L so as to be integrally rotatable around the shaft 95a, while the torsion spring 104 rotates clockwise in FIG. Always urged. Further, when the carrier-side upper connecting member 61 and the carrier-side lower connecting member 91 are brought into contact with each other in the vertical direction and the clevis 63 presses the connecting plate 209 downward and presses it against the upper surface of the connecting rod 92, the rotating piece 203. Does not touch the rotatable lock piece 205 at all. Therefore, the lock piece 205 is turned around the shaft 95b, and the recess of the clevis 95 is opened, that is, the connection is released. On the other hand, when the carrier-side upper member connecting member 61 and the carrier-side lower connecting member 91 are vertically separated from each other and the clevis 63 is separated from the connecting plate 209, the rotating pieces 203, 203 are biased by the torsion spring 204. It rotates clockwise and contacts the side surface of the connecting rod 92 so that it is locked. At this time, the rod piece 205 is allowed to rotate in the clockwise direction in FIG. 4, but the rotation of the rod piece 205 is prevented by the contact of the rotating piece 203 with the upper portion, that is, the rod piece 205 is in the connected state. .

The carrier-side lower connecting member 91 is attached to the lower end of a piston rod (downward) 91a of a hydraulic cylinder 91 fixed to a rear surface of the columns 55, 55 by a bracket 94. Further, sliding members 99, 99 are provided inside the side plates 97, 97. Therefore, the carrier-side lower connecting member 91 is vertically moved along the column 55 by expanding and contracting the piston rod 91 of the hydraulic cylinder 91. You can move.

Hydraulic motor 59, hydraulic cylinder 71 on the column device 51,
The 71 and the hydraulic cylinders 96, 96 are driven by the hydraulic circuit shown in FIG. This hydraulic circuit includes a hydraulic pump 148, a tank 240, a filter 241, and a directional control valve 242 for driving a hydraulic cylinder having 6 ports and 3 positions.
, Directional control valve 243 for driving the hydraulic motor, and check valves 245, 2
46 and flow control valves 247 and 248 connected to the respective ports of the hydraulic motor 59. Hydraulic pump 148, tank 240, filter 241, hydraulic cylinder driving directional control valve 242 having 6 ports and 3 positions, hydraulic motor driving directional control valve 243, check valves 245 and 246, and the hydraulic motor Flow control valves 247 and 248 connected to each port of 59
It has. Tank 240 is chassis frame 4 as usual
It is provided on the side of 6. Direction control valves 242 and 243 are provided on the column device 51. Then, in the column device 51, the respective hydraulic cylinders 71, 71, 96, 96 are connected in parallel, and these and the port of the directional control valve 242 are connected by a pair of pipes 251, 252, while the hydraulic motor 59 of the hydraulic motor 59 is connected. The flow control valves 247, 248 connected to the ports and the port of the directional control valve 243 are connected by a pair of pipes 253, 254. And
The directional control valves 242, 243 on the column 51, the hydraulic pump 148, and the tank 240 are connected by a pair of pipes 249, 250.
Column system 51 from the hydraulic pump 148 side by grouping 0 into one system
Leading to the side. When the directional control valves 242, 243 are both in the neutral position as shown in FIG. 7, the oil sent from the tank 240 through the filter 241 to the pipe 249 by the hydraulic pump 148 passes through the directional control valves 242, 243, It is vented to the tank 240 as it is through a pipe 250 connecting the 243 and the tank 240. On the other hand, the directional control valve 2
When 43 is in the operating position to form a straight flow path, the oil flows through the check valve 246, the directional control valve 243, the pipe 253, the flow control valve 247, the hydraulic motor 59, the flow control valve 248, the pipe 254, the directional control valve. Returning to tank 240 through 243 sequentially, and thus the hydraulic motor 59
Can be driven in either direction of rotation. When the directional control valve 243 is in the operating position forming the cross flow passage, the pipe 253 reverses the oil flow to the pipe 254, and therefore the hydraulic motor 59 can be driven in the opposite direction. Further, when the directional control valve 242 is in the operating position where it forms a straight flow path, the oil flows into the check valve 245 and the directional control valve 24.
2 and the pipe 251 to flow into the piston rods 71a, 71a, 95a, 96a side in each tube of the hydraulic cylinders 71, 71, 96, 96 and pressurize in the direction of simultaneously contracting each piston rod, while the directional control valve When the 242 is in the working position forming the cross flow path, the oil is transferred to the piston head in the tube.
71b, 71b, 96b, 96b side flows into each piston rod 71a, 71
A, 96a and 96a are pressed in a direction in which they are simultaneously stretched. In this way, the hydraulic cylinders 71, 71 and the hydraulic cylinders 96, 96
One directional control valve 242 is used for operation.

As shown in FIG. 3, the container 1 includes a box-shaped container body 2, columnar supporting members 3, 3, a container-side upper connecting member 11, a container-side lower connecting member 16, and a chain 21.
And 40. The container main body 2 includes symmetrically columnar rear columns 5 and 5, front columns 13 and 13, side columns 30 (only one side is shown), a rear beam 4, a front beam 14, and an upper side frame. 10,10, lower side frames 9,9, front panel 12, bottom plate 19, legs 20,20
And a top plate (not shown) and peripheral panels. A groove 12a having a concave cross section is provided in the vertical direction at the center of the front panel 12 and the front beam 14. The support member
3 and 3 are respectively fitted in the rear columns 5 and 5 so as to be able to move up and down, and a rectangular plate-shaped grounding member 7 is attached to the lower ends. The lower portions of the support members 3, 3 are connected to each other by the same shaft 8 so as to move up and down in synchronization with each other. The container-side upper connection member 11 is a semi-annular member,
Both ends are horizontally attached to the upper center of the front panel 12. The container-side lower connecting member 16 includes an engaging member 17 and a sliding member 18. The engaging member 17 has a U-shaped member 17c attached to a vertical rectangular plate 17b via reinforcing ribs 17d, and a vertical rectangular plate 17a attached vertically to the rectangular plate 17b. Above container side connecting member 1
6 is a rectangular plate 17a of the engaging member 17 and a channel-shaped sliding member
It has a shape that intersects with 18 grooves. And
Inside the groove 12a of the front panel 12 and the front beam 14, a pair of guide members 15 and 15 made of grooved steel are erected upright with a gap in parallel with the grooves facing inward, and the engagement is performed in this gap. Element
The rectangular plate 17a of 17 is fitted, and the inner surfaces of the grooves of the sliding member 18 are in sliding contact with the outer circumferences of the guide members 15, 15. Therefore,
The entire container-side upper connecting member 16 can slide vertically. A pair of the chains 21 is provided symmetrically (only one side is shown in the figure), one end of which is attached to a side portion of the sliding member 18 and is inserted into the front beam 14 and provided in the beam 14. The pair of sprockets 23, 24 bends from the upper side to the horizontal direction and from the horizontal direction to the lower side. Further, the sprocket 25 inserted into the front column 13 and provided at the lower portion of the column 13 bends from the vertical direction to the front-back direction, and the lower side. It is inserted into the side frame 9, and is extended upward from the front-rear direction by a sprocket 26 provided at the rear end of the side frame 9 to be connected to the upper portion 3a of the support member 3. The chain 40 has one end connected to the lower portion of the engaging member 17, extends vertically in the front surface of the container body 2, and is sprocket 42 provided at the lower end of the front portion of the container body 2 from the vertical direction. It is bent in the front-rear direction and passes under the bottom plate 9, and is further bent in the up-down direction by a sprocket 43 provided on the lower surface of the rear portion of the container body 2 to be connected to the shaft 8. Therefore, by pushing down the container side lower connecting member 16 from the state shown in FIG. 3, the supporting member 3 is projected downward through the chain 21, and the chain 40 is loosened to allow the shaft 8 to descend. That is, the lowering of the support member 3 can be permitted. Conversely, when the container-side lower connecting member 16 is moved upward from the lower end position, the chain 40 pulls up the supporting members 3 and 3 via the shaft 8, while the chain 21 allows the supporting member to rise. You will loosen as you do.

When loading the container 1 into the container handling vehicle 45, the procedure is as follows.

Now, the carrier 45 and the container 1 are in the state shown in FIG. 8A, the container-side lower connecting member 16 is in the raised position, and the supporting member 3 is in a state of being retracted in the rear column 5. Also, the piston rods 71a, 7 of the hydraulic cylinders 71, 71
1a is contracted, hydraulic cylinder 96 piston rod 96
a is in a stretched state, the carrier-side upper connecting member 61 and the carrier-side lower connecting member 91 abut vertically at the lowest point in the column device 51, so that the clevis 63, 95 are in a released state, respectively. There is. Further, the directional control valves 242 and 243 shown in the hydraulic circuit in FIG. 7 are both in the neutral position. In this state, the carrier-side upper connecting member 61 fits the container-side upper connecting member 11 into the recess of the clevis 63. Since the clevis 63 has the connecting pin 65 disengaged, it can be fitted easily. Further, the engaging member 17 of the container-side lower connecting member 16 is fitted into the recess of the clevis 95 of the carrier-side lower connecting member 91. Since the lock piece 205 of the carrier-side lower connecting member 91 is simply hung by its own weight and is in a rotatable state, it can be easily fitted like the upper connecting members 61 and 11. Next, the directional control valve 24
2 to the operating position of the cross flow passage to switch the hydraulic cylinders 71, 71
The piston rods 71a, 71a are extended to lift the carrier sprocket 82, the sub sprocket 86, etc., and the carrier-side upper connecting member 61 by the lift chain 84 to raise them. The lower part of the sub sprocket 86 is the sub chain 85.
It has been wound by. On the other hand, since the piston rod 96a of the hydraulic cylinder 96 is simultaneously receiving the hydraulic pressure to be expanded by the above operation of the direction control valve 242, the carrier-side lower connecting member 91 remains stationary in the lowered position of the column 55. When the carrier-side upper connecting member 61 rises and is separated from the carrier-side lower connecting member 91, the clevis 63 is automatically closed by the connecting pin 65, and at the same time, the clevis 95 is automatically closed by the lock piece 105. Will be blocked. That is, the carrier-side upper connecting member 61
And container side upper connecting member 11, carrier side lower connecting member 9
1 and the container-side lower connecting member 16 are automatically connected to each other. The front part of the container 1 is connected to the container-side upper connecting member 11 by the carrier-side upper connecting member 61.
And at the same time the rear part of the container 1 is lifted by the support member 3 as follows.
That is, since the container-side lower connecting member 16 is stationary with respect to the ground by the carrier-side lower connecting member 91 that is still, as shown in FIG. When 2 rises, it lowers relative to the container body 2 and its movement is the chain.
The support member 3 is transmitted to the support member 3 by the chain 21 and the chain 40, and the support member 3 projects downward to raise the rear portion of the container 1.
That is, the front part of the container 1 is the container-side upper connecting member.
The container 1 is lifted up by 11, the rear part is lifted up by the support member 3, and the movements thereof are synchronized, so that the container 1 is moved up in the horizontal direction. And the main body 2 of the container 1
When the main girder 32 provided at the lower portion reaches substantially the same level as the level of the sub-frame 47 of the carrier 45, the directional control valve 242 is switched to the neutral position to stop the operation of the hydraulic cylinders 71, 71 and stop the upward movement. . Next, with the brake of the carrier 45 released and the transmission in neutral, the directional control valve 243 is actuated to drive the hydraulic motor 59 on the column device 51 to move the column device 51 to the subframe.
Move forward relative to 47. At this time, the rear portion of the container 1 is supported by the lower end grounding member 7 of the support member 3 and does not move horizontally with respect to the ground. Therefore, as shown in FIG. 8C, the carrier 45 side is pulled backward by the chain 58. Be moved and moved. Then, after the horizontal movement of the carrier 45 is completed, with the container 1 placed on the carrier 45, the directional control valve 242 is switched to the operation position of the straight flow passage to contract the piston rod 96a of the hydraulic cylinder 96 to move the carrier. The lower side connecting member 91 is raised. At this time, the piston rod 71a of the hydraulic cylinder 71 tries to contract, but since the carrier-side upper connecting member 61 is connected to the container-side upper connecting member 11, it is held at the height of the container-side upper connecting member 11. . Therefore, the sub sprocket
86 is prevented from moving downward by the sub-chain 85,
It is kept at the same height. Therefore, the hydraulic cylinder 71
Of the lift processor 84 and the downward movement of the lift processor 82 are prevented, and the lift chain 84 is prevented from loosening. As described above, due to the action of the sub-chain 85 and the sub-sprocket 86, the piston rod 71a of the hydraulic cylinder 71 remains expanded even when it receives the hydraulic pressure to be contracted simultaneously with the hydraulic cylinder 96 by the above-described operation of the directional control valve 242. It becomes a state. Then, as shown in FIG. 8D, the container-side lower connecting member 16 connected to the carrier-side lower connecting member 91 is raised, and the supporting member 3 is pulled up from the ground by the chains 21 and 40. After loading is complete, the directional control valve 242 is returned to the neutral position.

When unloading the container 1 from the carrier 45, the procedure is exactly opposite to that described above.

That is, first, the directional control valve 242 is switched to the operating position that forms the cross flow passage, and the piston rod of the hydraulic cylinder 96 is changed.
Extend 96a. As a result, the supporting member 3 is projected from the main body 2 of the container 1, and the supporting member 3 is landed through the state shown in FIG. 8 (d). Next, the carrier 45 is moved forward, and after passing through the state of FIG. 8C, the carrier 45 is moved to the front of the container body 2 while maintaining the height of the container body 2. The column device 51 comes at the end of the carrier 45.
Next, the directional control valve 242 is switched to the operating position where the straight flow path is formed. Then, the hydraulic cylinder 71 contracts before the hydraulic cylinder 96 due to the own weight of the container 1, and the hydraulic cylinder 96 does not substantially contract. Therefore, the carrier-side upper connecting member 61 is lowered from the raised position, and the carrier-side lower connecting member 91 is held in the lowered position. As a result, the front part of the container 1 is lowered by the container-side upper connecting member 11,
The rear part descends due to the contraction of the support member 3. Container 1
Since the movements of the front part and the rear part of the container 1 are synchronized, the container 1 descends while keeping the horizontal state. Therefore, the container body 2 is lowered to the ground through the state shown in FIG. 8 (b) (FIG. 8 (a)). When the container body 2 reaches the ground, the directional control valve 242 is switched to the neutral position. Then, the carrier 45 is moved forward to separate the container-side lower connecting member 11 and the container-side upper connecting member 16 from the carrier-side upper connecting member 61 and the carrier-side lower connecting member 91. At this time, the carrier-side upper connecting member 61 and the carrier-side lower connecting member 91 are in contact with each other vertically at the lowest point in the column device 51, and the clevis 63 and 95 are in the released state, respectively, so that it is easy. Can be disengaged.

In this way, the container handling vehicle can load and unload the container 1 on the carrier 45 while maintaining the horizontal posture. Moreover, the carrier-side upper connecting member 61 and the container-side upper connecting member 11, and the carrier-side lower connecting member 91 and the container-side lower connecting member 16 can be automatically connected or released in accordance with the loading / unloading operation. further,
At the time of loading, the carrier 45 is pulled rearward via the chain 58 by driving the hydraulic motor 59 of the column device 51 in a state where the transmission is in neutral, so that the speed of movement is increased. Easy to control and slow down. By reducing the moving speed, it is possible to prevent the carrier 45 and the container 1 from colliding and being damaged.

In addition, the subframe 4 laid on the chassis frame 46
Since the column device 51 can be moved forward and backward through the single chain 58 between 7,47,
The groove width of 47, 47 may be the minimum width that allows the chain 58 to pass through, and can be made narrower than in the conventional case, so that the overall height of the carrier 45 can be made low.

Further, a hydraulic motor 59 for moving the column device 51 in the front-rear direction, hydraulic cylinders 71, 71 for moving the carrier-side upper connecting member 61 in the vertical direction, and a carrier-side lower connecting member 91.
Since the hydraulic cylinders 96, 96 for moving the vertical direction are provided together on the column device 51, the pipes 249, 250 from the hydraulic pump 48 side can be integrated into one system.

Further, the hydraulic cylinders 71, 71 and the hydraulic cylinders 96, 96
Since they are connected in parallel and are controlled by the same directional control valve 242 at the same time, it is possible to prevent an operation error such as a wrong hydraulic cylinder being driven. Therefore, it is possible to prevent the container from inclining and prevent the load in the container from falling.

<Effects of the Invention> As is clear from the above, the container loading and unloading vehicle of the present invention is capable of loading and unloading a container while maintaining a horizontal posture, and further, loading and unloading of the container according to the loading / unloading operation. Arms and containers can be automatically connected or disconnected.

Further, the container cargo handling vehicle of the present invention includes a pipe connecting the first fluid cylinder and the second fluid cylinder in parallel,
One control valve for switching the flow of fluid in a direction in which the first fluid cylinder and the second fluid cylinder are simultaneously expanded or contracted, and a sub sprocket provided in a moving portion of the first fluid cylinder, and the sub-sprocket is wound from below. One end is fixed to the upper part of the column device, and the other end is provided with a sub-chain fixed to the carrier-side upper connecting member, so that both the first fluid cylinder and the second fluid cylinder operate in one of expansion and contraction, When the carrier-side upper connecting member connected to the container-side upper connecting member is in the raised position and the carrier-side lower connecting member is in the lowered position with the container mounted on the vehicle body, the first, When the control valve is switched in the direction in which the second fluid cylinder is actuated to either the extension or the contraction, the operation of the first fluid cylinder is changed to the sub-sprocket. And restrained in the sub chain and,
Since the carrier-side upper connecting member is made to stand still in the raised position, the lift chain is prevented from loosening and coming off the lift sprocket, and at the same time, one control valve controls both fluid cylinders. It is possible to prevent an erroneous operation, and thus to prevent the container from tilting and prevent the load in the container from falling.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a diagram showing a state in which a container is loaded on a container loading / unloading vehicle according to an embodiment of the present invention, and FIG. 2 is a view showing the container loading / unloading vehicle as seen obliquely from the rear, FIG. 3 is a view showing the container as seen obliquely from the front, and FIG.
FIG. 5, FIG. 5 and FIG. 6 are views showing the column device of the container handling vehicle seen from the side, rear and front, respectively. FIG. 7 is a view showing a hydraulic circuit of the container handling vehicle, FIG. FIGS. 10 (a) to 10 (d) are views for explaining the operation of loading the container into the container-carrying vehicle, FIG. 9 is a view showing a conventional container-carrying vehicle as seen obliquely from the rear, and FIG. 10 (a). FIGS. 3A to 3D are diagrams illustrating an operation of loading a container on the conventional container handling vehicle. 1 ... Container, 2 ... Container main body, 3 ... Support member, 11 ... Container side upper connecting member, 16 ... Container side lower connecting member, 17 ... Engaging member, 21,40,58,84, 85 …… Chain, 23,24,25,26,42,43,54,56,57,82,86 …… Sprocket, 45 …… Carrier, 46 …… Chassis frame, 47 …… Subframe, 51 …… Column device, 59 …… hydraulic motor, 61 …… carrier side upper connecting member, 63,95 …… clevis, 65 …… connecting pin, 69 …… operating pin, 71,96 …… hydraulic cylinder, 71a, 96a …… Piston rod, 91 …… Carrier side lower connecting member, 203 …… Rotating piece, 204 …… Torsion spring, 205 …… Locking piece, 209 …… Coupling plate, 242,243 …… Direction control valve, 249,250251,252,253,251… … Hydraulic piping.

Claims (1)

[Claims] 1. A column device provided on a subframe mounted on a chassis frame so as to be movable back and forth, and a carrier side provided on the column device so as to be vertically movable and detachably connected to a container-side upper connecting member. An upper connecting member, a carrier-side lower connecting member that is provided in the column device so as to be movable up and down, and is detachably connected to the container-side lower connecting member, and one end is fixed to the carrier-side upper connecting member and the other end is A lift chain fixed to the column device, a lift sprocket on which the lift chain is wound upward, a first fluid cylinder for vertically moving the lift sprocket by expanding and contracting the piston rod, and the carrier-side lower connecting member for the piston rod. In a container handling vehicle including a second fluid cylinder that is moved up and down by expansion and contraction of A pipe that connects the first fluid cylinder and the second fluid cylinder in parallel, one control valve that switches the flow of the fluid in a direction that simultaneously expands or contracts the first fluid cylinder and the second fluid cylinder, and the first fluid cylinder The first fluid cylinder is equipped with a sub-chain that is wound from below on a sub-sprocket provided in the moving part of the column, one end of which is fixed to the upper part of the column device, and the other end of which is fixed to the carrier-side upper connecting member. And the second
With the fluid cylinders both operating to extend or contract, and the container is mounted on the subframe, the carrier-side upper connecting member connected to the container-side upper connecting member is in the raised position, while the carrier-side lower part is When the control valve is switched to the direction in which the first and second fluid cylinders are operated to extend or contract when the connecting member is in the lowered position, the operation of the first fluid cylinder is operated via the sub-sprocket. A container-carrying vehicle, characterized in that the upper chain connecting member on the carrier side is restrained in an ascending position by being restrained by the sub-chain.