JP2845993B2 - Container handling vehicle - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a container loading / unloading vehicle for loading and unloading containers while maintaining a horizontal posture by a loading / unloading arm.

<Conventional Technology> Conventionally, there is a container handling vehicle equipped with a carrier 145 as shown in FIG. This carrier 145 has sub-frames 147, 147 made of channel steel mounted on a vehicle body (chassis frame) 146 in the front-rear direction with the grooves inwardly facing each other. On the sub-frames 147, 147, a column device 151 is provided so as to be movable in the front-rear direction indicated by an arrow X. This column device 151 has a subframe 147,1
The upper side of the sub-frame 147 is slid along the upper side of the sub-frame 147, with the upper side of the 47 being sandwiched between the slide pads 152, 152 from the upper and lower sides. The column device 151 has 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). Then, this bottom plate is attached to the chassis frame 1 between the sub-frames 147, 147.
The sprockets 156 and 157 provided at the front and rear portions of the 46 are fixed to a chain 158 to be wound. The front sprocket 157 is directly driven by a hydraulic motor 159 provided at the front of the chassis frame 146. Therefore, by operating the chain 158 by the hydraulic motor 159, the column device 151 can move freely in the front-rear direction indicated by the arrow X.

On the other hand, the carrier-side upper connecting member 161 and the carrier-side lower connecting member 9
1 is provided so as to be able to move up and down in the vertical direction indicated by arrow Z. The carrier-side upper connecting member 161 is provided with columns 55, 5 by rollers 164, 164, 164, 164 provided at four corners of a U-shaped flat plate 162.
It is designed to 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 provided opposite to each other on the left and right sides.
The ends of the piston rod 171a are connected by a shaft 181 and sprockets 182, 182 and rollers 183, 183 are attached to both ends of the shaft 181. The rollers 183, 183 roll in the grooves of the columns 155, 155, and each piston rod 171a
Guide up and down operation. In addition, 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 connection member 161. Therefore, the upper connecting member 161 can be pulled up by the chains 184, 184 by extending the piston rod 171a of each of the hydraulic cylinders 171. Also, by contracting the piston rod 171a of each hydraulic cylinder 171, the upper connecting member 161 can be
Can be lowered by its own weight. The carrier-side lower connecting member 191 has a pair of clevises 195, 195 attached rearward at 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 is attached to the member 192 by a wire. The lower connecting member 191 is provided with a pair of hydraulic cylinders 197 provided on the sides of the columns 155 and 155.
By connecting each of the hydraulic cylinders 197 to the distal end of the piston rod 197a (only one side is shown), the lower connecting member 191 can be driven in any direction. Also, control valves for controlling these operations are provided for the hydraulic motor 159 and the hydraulic cylinders 171 and 197, respectively, and a hydraulic pump 148 provided on the side of the chassis frame 146 is provided with a hydraulic valve (not shown) through each control valve through a hydraulic pipe (not shown). And each control valve is operated to be driven independently of each other.

When loading containers into this carrier 145, first
As shown in FIG. 2A, the carrier-side upper connecting member 161 and the container-side upper connecting member 111 provided at the front of the container 101 are connected, and the carrier-side lower connecting member 191 is connected.
And a container-side lower connecting member 116 provided vertically movable at the front of the container 101. At this time, it is assumed that the piston rod 171a of the hydraulic cylinder 171 is contracted while the piston rod 191a of the hydraulic cylinder 191 is extended. Then, as shown in FIG. 12 (b), the carrier-side upper connecting member 161 and the container-side upper connecting member 111 are raised by extending the piston rod 171a of the hydraulic cylinder 171 to raise the front part of the container 101. On the other hand, the carrier-side lower connecting member 191 and the container-side lower connecting member 116 are kept stationary with respect to the ground. Then, the container side lower connecting member 116 is lowered relatively to the container body 102, and the movement is
The support member 103 is protruded downward by the signal transmitted by 21, and the rear part of the container 101 is raised. That is, the front part and the rear part of the container 101 are synchronized and raised horizontally. The main girder 132 provided on the lower surface of the container 101 is
When the level becomes substantially the same as 7, the hydraulic motor 159 shown in FIG. 9 is driven as shown in FIG. 12 (c). Then, the column device 151 is moved forward through the chain 158 to move the container 101 horizontally (container 101
Is supported by rollers 107 at the lower end of the support member 103). When loading is completed, as shown in FIG. 12 (d), the piston rod 197a of the hydraulic cylinder 197 is contracted to raise the carrier-side lower connecting member 191 and the container-side lower connecting member 116, and the chain 140 The support member 103 is lifted via the. When the container 101 is unloaded from the carrier 145, the operation is performed in a completely opposite manner to that described above.

<Problems to be Solved by the Invention> Meanwhile, in the conventional container handling vehicle, the hydraulic motor 159 for horizontally moving the container 1 in the front-rear direction and the hydraulic cylinders 171 and 197 for vertically moving the container 1 are driven independently of each other. I have. For this reason, while the container 101 is being moved horizontally by driving the hydraulic motor 159 as shown in FIG.
An operation for driving the 197 may be performed. When an erroneous operation of contracting the hydraulic cylinder 197 is performed, the chain 121 that has protruded the support member 103 of the container 101 is loosened, and the support member 103 is stored in the rear column 105. As a result, the rear part of the container 101 Descend. On the other hand, the front part of the container 101 rests on the sub-frame 147 and remains at the same height. Therefore, there is a problem that the container 101 is tilted as a whole with respect to the ground, and the load in the container 101 falls.

Therefore, an object of the present invention is to provide a container cargo handling vehicle that can prevent a container from being tilted even if a worker makes an erroneous operation during horizontal movement, and prevents a load in the container from falling down. is there.

<Means for Solving the Problems> In order to achieve the above object, the present invention comprises a container and a carrier, wherein the container is provided with a vertically movable support member provided at a rear portion of the container body, and A container-side upper connecting member provided at a front part, a container-side lower connecting member movably provided at a front part of the container main body, and an operation of the container-side lower connecting member transmitted to the supporting member, A transmission device for raising and lowering the support member is provided, and the carrier is provided on a subframe mounted on a chassis frame so as to be movable back and forth, and is provided on the column device so as to be vertically movable,
A carrier-side upper connecting member connected to the container-side upper connecting member; a carrier-side lower connecting member provided to be vertically movable in the column device and connected to the container-side lower connecting member; In the container cargo handling vehicle provided with the carrier-side upper connecting member and the driving means for vertically moving or stopping the carrier-side lower connecting member, in the carrier, the column device is located at a rear portion on a subframe. A rear limit switch that is deactivated when the column device is located at a position other than the rear portion on the sub-frame; and a rear limit switch that is activated when the column device is positioned at a front portion on the sub-frame. A front limit switch that is deactivated when the device is in a position other than the front on the subframe; During operation of the switch or the front limit switch only it is characterized by comprising an operation switch that allows vertical movement of the carrier-side top connecting member and the carrier-side bottom connecting member by the drive means.

<Operation> When loading a container into a carrier, first, the column device is arranged at the rear part on the sub-frame, and the carrier-side upper connecting member and the carrier-side lower connecting member are connected to the container-side upper connecting member and the container-side lower connecting member, respectively. Is done. When the column device is located at the rear on the subframe, the rear limit switch is activated. Therefore,
By operating the operation switch, the driving means operates as in the conventional case. In other words, the carrier-side upper connecting member and the container-side upper connecting member move upward to move the front part of the container upward, while the carrier-side lower connecting member and the container-side upper connecting member stand still with respect to the ground. At this time, the operation of the lower connecting member on the container side is transmitted to the supporting member by the transmission means, the supporting member protrudes downward, and the rear portion of the container rises. As a result, the front and rear portions of the container rise in unison, and the container rises horizontally.

Next, the column device and the container are horizontally moved relatively forward with respect to the carrier. During the horizontal movement of the container, both the rear limit switch and the front limit switch are deactivated because the column device is at an intermediate position between the rear and the front on the subframe. For this reason, even if the operator erroneously operates the operation switch while moving the container horizontally, the driving means does not operate. As a result, the carrier-side upper connecting member and the container-side upper connecting member or the carrier-side lower connecting member and the container-side lower connecting member do not move up and down, and the front part and the rear part of the container are kept at the same height.
Therefore, the container is prevented from tilting, and the load in the container does not fall.

When the horizontal movement of the container is completed and the column device reaches the front on the sub-frame, the front limit switch is activated. Therefore, by operating the operation switch, the driving means operates as in the conventional case. That is,
The carrier-side lower connecting member and the container-side lower connecting member are raised, and the supporting member is raised via the transmission member. In this way, the container is loaded on the carrier while maintaining the horizontal posture.

When unloading a container from a carrier, the procedure is exactly the same as when loading a container. First, in a state where the column device is located at the front of the sub-frame, the front limit switch is operated, and thus the drive means is operated by operating the operation switch. As a result, the carrier-side lower connecting member and the container-side lower connecting member are raised, and the supporting member is projected downward via the transmission member.

Next, the column device and the container are moved rearward relative to the carrier. Since both the front limit switch and the rear limit switch do not operate while the column device is at an intermediate position between the front part and the rear part on the subframe, even if the operator operates the operation switch incorrectly, The driving means does not operate. Therefore, the container is prevented from tilting, and the load in the container does not fall. When the column device reaches the rear on the subframe, the rear limit switch is activated. Therefore, the driving means operates by operating the operation switch. Then, the container is unloaded from the carrier while maintaining a horizontal posture in an operation completely opposite to the case of loading the container.

<Embodiment> Hereinafter, a container cargo handling vehicle of the present invention will be described with reference to an embodiment.

FIG. 1 shows a side view of a container handling vehicle according to one embodiment of the present invention. This container handling vehicle is roughly divided into a carrier 45 and a container 1.

As shown in FIG. 2, the carrier 45 has sub-frames 47, 47 made of channel steel mounted on a chassis frame 46 in the front-rear direction with the grooves parallel to each other and the grooves facing inward. A column device 41 is provided on the sub-frames 47, 47 so as to be movable in the front-rear direction indicated by an arrow X. FIGS. 4, 5, and 6 show the column device 51 viewed from the side, rear, and front, respectively. This column device
Reference numeral 51 is such that the upper sides of the side frames 47, 47 are slid along the upper sides of the side frames 47, 47 by sandwiching the upper sides of the side frames 47, 47 from the upper and lower sides via channel pads 53, 52, respectively. The column device 51 is provided with H on channel steels 53,53.
A pair of columns 55 made of shaped steel is provided on the left and right, and the top is
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
A hydraulic motor 59 is provided on the upper side, and a sprocket 57 is provided on a rotating shaft of the hydraulic motor 59.On the other hand, sprockets 54 and 56 are provided immediately below the bottom plate 80, that is, at positions before and after the sprocket 57 at the level of the upper side of the subframe 47. ing.
A single 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 connecting the front ends of the sub-frames 47, 47
a, and is bent upward by the sprocket 54 from the front-rear direction through the space between the subframes 47, 47, bent downward and rearward by the sprockets 57, 56, respectively, and further connects the rear ends of the subframes 47, 47. The other end 58b is bent by the shaft 48 to the center 46a
Is fixed. Subframe 47, 47 groove width is chain 5
The minimum width is sufficient to allow 8 to pass, so that the overall height of the carrier 45 is reduced. By driving the hydraulic motor 59 in any rotational direction, the column device
51 can be freely moved forward or backward along the chain 58.

On the other hand, a carrier-side upper connecting member 61 and a carrier-side lower connecting member 91 are provided at the rear portions of the columns 55, 55 so as to be vertically movable as indicated by arrow Z, respectively. 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, respectively, and a horizontal rod 67, which connects the central portions of the horizontal rods 66, 88. The clevis 63 includes a connecting pin 65 that can be connected through both sides of the clevis 63, a pair of left and right arms 68, 68 and operating pins 69, 69. The clevis 63 is attached with the concave portion facing rearward. Further, one end of the arm 68 is rotatably attached to a shaft 68a provided on the vertical rod 67, and the connecting pin 65 and the operating pin 6
Each of the upper parts 9 is rotatably mounted with play in the longitudinal direction of the arm 68. When the operating pin 69 is not pressed upward by a rod 92 described later of the carrier-side lower connecting member 91, the connecting pin 65
The arm 68 is rotated by its own weight with the fulcrum as a fulcrum to connect the clevis 63, while 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 detaches the clevis 63 upward to release the connection.

Inside the columns 55, 55, a pair of hydraulic cylinders 71,
The 71 is fixed to the bottom plate 80 with the pin 74 at the lower end of the tube, and stands upright.
The upper ends of the piston rods 71a, 71a of the hydraulic cylinders 71, 71 are connected by a shaft 75, and sprockets 82, 82 are attached to both ends of the shaft 75, respectively. Further, a pair of support members 73, 73 are vertically mounted substantially at the center of the shaft 75, and a sprocket 86 is mounted between lower ends of the support members 73, 73. A pair of chains 84, 84 fixed to the vicinity 81 of the lower end of the tube of the hydraulic cylinders 71, 71 are wound around the sprockets 82, 82 and hung down, and both ends 88a, 88a of a horizontal rod 88 of the carrier-side upper connecting member 61. On the other hand, the chain 85 fixed to the central portion 70a of the top plate 70 is wound around the sprocket 86 and extended upward, and is connected to the central portion 88b of the upper horizontal rod 88. Therefore, when the piston rod 71a of the hydraulic cylinder 71 is extended, the sprockets 82, 82, the shaft 75, the support members 73, 73, and the sprocket 86 are integrally raised, and the carrier-side upper connecting member 61 is pulled up by the chain 84. Can, on the other hand, chain 85
Allows the carrier-side connecting member 61 to rise in a state where the sprocket 86 is wound and restrained. 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 can be moved up and down between the left and right columns 55 along the groove inside the column 55 by rollers 64 attached to the side surface of the plate 62.

On the other hand, the carrier-side lower connecting member 91 includes a pair of side plates 97, 97 covering the side surfaces of the column 55, a pair of upper and lower rods 92, 93 for connecting the side plates 97, 97 horizontally, and a pair of the rods 92, 93. It has a clevis 95 mounted in the center. Further, a pair of rotating pieces 203, a torsion spring 204 as a resilient member, and a pair of locking pieces 205, 205 are attached to the clevis 95. The clevis 95 is attached with its U-shaped concave portion directed rearward and horizontally with its tip protruding. The lock piece 105 is freely rotatable around a shaft 95b provided at an upper end of the clevis 95, and hangs down in a vertical direction by its own weight so as to close at least a part of the concave portion of the clevis 95. The rotating pieces 203, 203 are formed of substantially L-shaped plates, and a portion corresponding to the short side of L is attached to a shaft 95a provided at a location near the connecting rod 92 above the clevis 95. A connecting plate 209 for connecting the long sides of the left and right L is provided so that the rotating pieces 203 can be integrally rotated around the shaft 95a, while the torsion spring 104 rotates clockwise in FIG. Always energized. Further, when the carrier-side upper connecting member 61 and the carrier-side lower connecting member 91 abut against each other up and down, and the clevis 63 presses the connecting plate 209 downward and presses against the upper surface of the connecting rod 92, the rotating piece 203 Does not contact the rotatable lock piece 205 at all. Accordingly, 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 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 urged by the torsion spring 204, rotate clockwise, abut against the side surface of the connecting rod 92, and are locked. At this time, the clockwise rotation of the rod piece 205 is allowed in FIG. 4, but the counterclockwise rotation is prevented by the rotation piece 203 abutting on the upper part, that is, the rod piece 205 is in a connected state. .

The carrier-side lower connecting member 91 is attached to a lower end of a piston rod (downward) 96a of a hydraulic cylinder 96 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, and therefore, the carrier-side lower connecting member 91 moves up and down along the column 55 by extending and retracting the piston rod 96a of the hydraulic cylinder 96. You can move.

The hydraulic motor 59, hydraulic cylinder 71,
The 71 and the hydraulic cylinders 96 are driven by a hydraulic circuit shown in FIG. The 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 six ports and three positions.
And a directional control valve 243 for driving a hydraulic motor also having 6 ports and 3 positions, check valves 245 and 246, and the hydraulic motor 59
Are provided with flow control valves 247 and 248 connected to the respective ports. The hydraulic pump 48 and the tank 240 are provided on the side of the chassis frame 46 as before. Directional control valves 242 and 2
43 is provided in the column device 51, and in the column device 51, the respective hydraulic cylinders 71, 71, 96, 96 are connected in parallel,
These and the port of the directional control valve 242 are connected to a pair of piping 25
On the other hand, the flow control valves 247 and 248 connected to the ports of the hydraulic motor 59 and the ports of the direction control valve 243 are connected by a pair of pipes 253 and 254. Then, the directional control valves 242 and 243 in the column device 51 and the chassis frame 48
The hydraulic pump 48 on the side and the tank 240 are connected by a pair of reciprocating pipes 249 and 250 that are integrated into one system. Directional control valve 2
The solenoids 242a, 242b move the spool by the solenoids 242a, 242b; 243a, 243b, respectively, to switch the operating position. When the power is supplied, a straight path is formed. Each of the solenoids 242a, 242b, 243a, 243b is controlled by an electric circuit shown in FIG. 8 and FIG. As shown in FIG. 9, the electric circuit includes a limit switch 270 and a limit switch 271 each having a 24V battery 300 and one normally open contact NO and one normally closed contact NC.
And an operation switch 260 having four normally open contacts U, D, F, and B. Above limit switch 27
0,271, as shown in FIG.
7 are provided at the front end and the rear end. The limit switch 270 is
When the column device 51 is located at the front of the sub-frame 47, the normally open contact NO closes while the normally open contact NO closes by contacting the front surface of the column device 51, and the normally closed contact NC opens. When the column device 51 is located at the rear of the sub-frame 47, the limit switch 271 abuts on the rear surface of the column device 51 to close the normally open contact NO and open the normally closed contact NC. . The operation switch 260 is provided in the driver's seat of the vehicle 45, and allows the operator to arbitrarily close any one of the contacts U, D, F, and B. And the battery 300
Are connected to the contacts NO, NC of the limit switches 270, 271; NO, NC, and the normally open contacts NO, NO of the limit switches 270, 271 are connected to the contacts U, D of the operation switch 260 by common wiring.
On the other hand, the contact NC of the limit switch 270 is independently connected to the contact F of the operation switch 260, and the contact NC of the limit switch 271 is independently connected to the contact B of the operation switch 260. U, D, F and B are connected to the respective solenoids 242a, 242b, 243a and 243b. Thus, the limit switch 270 or 271 and the operation switch 260 are connected in series to each of the solenoids 242a, 242b, 243a. Note that a protection diode 244 is provided in parallel with each solenoid. Reference numeral 261 denotes a bendable and stretchable support band for preventing bending of the installed cable. When the column device 51 is at the front of the sub-frame 47, the contact NO of the limit switch 270 is closed, the contact NC is open, the contact NO of the limit switch 271 is open, and the contact NC is closed (normal state). Therefore, at this time, by closing the contact U, D or B of the operation switch 260, the solenoid 242a,
242b or 243b can be energized, while closing contact F cannot energize solenoid 243a. That is, the directional control valve 242 is moved from the neutral position to the operating position where the cross flow path or the straight flow path is formed, or the directional control valve 243
Can be switched from the neutral position to the operating position where the straight flow path is formed. However, it is not possible to switch the direction control valve 242 from the neutral position to the operating position where the straight flow path is formed. On the other hand, when the column device 51 is at the rear of the sub-frame 47, the limit switch 270 is in the normal state, the contact NO of the limit switch 271 is closed, and the contact NC is open. Therefore, at this time, the solenoid 242a, 242b, or 243a can be energized by closing the contact U, D, or F of the operation switch 260. On the other hand, even if the contact B is closed, the solenoid 243b cannot be energized. That is,
Although the directional control valve 242 can be switched from the neutral position to an operation position for forming an intersection flow path or a straight flow path, or the directional control valve 243 can be switched from a neutral position to an operation position for forming an intersection flow path, It is not possible to switch from the neutral position to the operating position where the straight flow path is formed. When the column device 51 is at the intermediate position of the sub-frame 47, the limit switches 270 and 271 are both in the normal state. Therefore, at this time, the contact F of the operation switch 260
Or by closing B solenoid 243a or 24
3b can be energized, whereas closing contacts U or D cannot energize solenoid 242a or 242b. That is, although the directional control valve 243 can be switched from the neutral position to any of the above-described operating positions, the directional control valve 242 cannot be switched from the neutral position to any of the operating positions. The directional control valves 242 and 243 are the seventh
When both are in the neutral position as shown, the tank 240
Piping 249 from hydraulic pump 48 through filter 241
Is sent to the tank 240 through the directional control valves 242 and 243, and the pipe 250 connecting the directional control valve 243 and the tank 240. On the other hand, solenoid 2
When the directional control valve 243 is in the operating position where the directional control valve 243 forms a straight flow path when 43b is energized, the oil flows through the check valve 246 and the directional control valve.
243, piping 253, flow control valve 247, hydraulic motor 59, flow control valve 2
48, the pipe 254, and the direction control valve 243, and return to the tank 240, so that the hydraulic motor 59 can be driven in any rotational direction. In this case, the column device 51 moves backward with respect to the sub-frame 47. Solenoid 243a
Is energized and the directional control valve 243 is in the operating position where the cross flow path is formed, the pipe 253 reverses the oil flow to the pipe 254, so that the hydraulic motor 59 can be driven in the opposite direction. it can. In this case, the column device 51 moves forward with respect to the sub-frame 47. Also, when the solenoid 242b is energized and the directional control valve 242 is in the operating position where a straight flow path is formed, the oil flows through the check valve 245, the directional control valve 242, and the pipe 251 to the hydraulic cylinders 71, 71, 9
6,96 piston rods 71a, 71a, 96a, 96a in each tube
When the solenoid 242a is energized and the directional control valve 242 is in the operative position to form an intersecting flow path, the oil is forced into the piston head in the tube. It flows into the side of 71a, 71b, 96b, 96b and pressurizes each piston rod 71a, 71a, 96a, 96a in a direction to extend simultaneously. Thus, the hydraulic motor 59 is driven by the direction control valve 243, the hydraulic cylinders 71, 71 and the hydraulic cylinders 96, 96 are driven by one direction control valve 242, and the two control valves 242 and 243 are connected by one direction. It is controlled by the operation switch 260.

As shown in FIG. 3, the container 1 includes a box-shaped container main body 2, columnar support members 3, 3, a container-side upper connecting member 11, a container-side lower connecting member 16, a chain
It has 21 and 40. The container body 2 includes a rear column 5,5, a front column 13,13, a side column 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 panel and peripheral panels (not shown). At the center of the front panel 12 and the front beam 14, a groove 12a having a concave cross section is provided in the vertical direction. The support members 3, 3 are respectively fitted inside the rear columns 5, 5 so as to be able to move up and down, and a rectangular plate-shaped ground member 7 is attached to the lower end. The lower parts of the support members 3, 3 are connected by the same shaft 8, so that they are moved up and down in synchronization with each other. The container side upper connecting 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 a reinforcing rib 17d, and a vertical rectangular plate 17a vertically attached to the rectangular plate 17b. Container side upper connection member 1
6 is a rectangular plate 17a of the engaging member 17 and a channel-shaped sliding member.
It is configured to cross the 18 grooves. And
In the groove 12a of the front panel 12 and the front beam 14, a pair of guide members 15 and 15 made of channel steel are erected in parallel with a gap facing inward with the groove inward, and the engagement with the gap is performed. The rectangular plate 17a of the member 17 is fitted, and the inner surface of the groove of the sliding member 18 is in sliding contact with the outer periphery of the guide members 15,15. Therefore, the entire container-side upper connecting member 16 can slide in the vertical direction. The chain 21 is provided as a pair symmetrically to the left and right (only one side is shown in the figure), and one end is connected to the sliding member.
18 and inserted into the front beam 14, bent in a horizontal direction from above and horizontally downward by a pair of sprockets 23 and 24 provided in the beam 14, and further inserted into the front column 13. Then, it is bent in the front-rear direction from the up-down direction by a sprocket 25 provided at the lower portion of the column 13, inserted into the lower side frame 9, and extended upward from the front-rear direction by a sprocket 26 provided at the rear end of the side frame 9. To the upper part 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 vertically extended by a sprocket 42 provided at a lower front end of the container body 2. It is bent in the front-rear direction, passes below the bottom plate 9, and is further bent in the up-down direction and connected to the shaft 8 by a sprocket 43 provided on the rear lower surface of the container body 2. Therefore, by pushing down the container-side lower connecting member 16 from the state shown in FIG. 3, the support 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 allowed.
Conversely, when the container side lower connecting member 16 is moved upward from the lower end position, the support members 3, 3 are pulled up by the chain 40 via the shaft 8, while the chain 21 allows the support member to rise. You will be so relaxed.

When the container 1 is loaded on the carrier 45, the following operation is performed.

Now, the carrier 45 and the container 1 are in the state shown in FIG. 10 (a), the column device 51 is at the rear of the sub-frame 47, the container-side lower connecting member 16 is at the raised position,
The support member 3 is in a state of being thrown into the rear column 5. Further, the piston rods 71a, 71a of the hydraulic cylinders 71, 71 are in a contracted state, the piston rod 96a of the hydraulic cylinder 96 is in an expanded state, and the carrier-side upper connecting member 61 and the carrier-side lower connecting member 91 are in the column device 51. It is assumed that the clevises 63 and 95 are in a disconnected state, respectively. The operation switch 260 shown in FIGS. 8 and 9 is in a normal state, and the directional control valves 242 and 243 shown in FIG. 7 are both in the neutral position. In this state, the container-side upper connection member 11 is fitted into the recess of the clevis 63 of the carrier-side upper connection member 61. Because the clevis 63 is in a state where the connecting pin 65 is detached,
It can be easily fitted. Also, the container-side lower connecting member is inserted into the concave portion of the clevis 95 of the carrier-side lower connecting member 91.
The 16 engaging members 17 are fitted. Carrier side lower connecting member 91
Since the lock piece 205 is simply suspended by its own weight and is freely rotatable, it can be easily fitted similarly to the upper connecting members 61 and 11. Next, the operation of closing the contact U of the operation switch 260 is performed to switch the direction control valve 242 to the operating position of the cross flow path. At this time, since the contact NO of the limit switch 271 provided at the rear end of the sub-frame 47 is ON, the solenoid 242a is energized and switched. Then, the piston rods 71a, 71a of the hydraulic cylinders 71, 71 are extended, and the carrier-side upper connecting member 61 together with the sprockets 82, 86 and the like are pulled up by the chain 84 and raised. In addition,
The lower part of the sprocket 86 is restrained by the chain 85. On the other hand, since the piston rod 96a of the hydraulic cylinder 96 is simultaneously receiving the hydraulic pressure to be extended by the above operation of the operation switch 260, the carrier-side lower connecting member 91 remains stationary at the lowered position of the column 55. Then, the carrier-side upper connecting member 61 rises and separates from the carrier-side lower connecting member 91, whereby 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.
That is, 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 are automatically connected. The front part of the container 1 is lifted by the carrier-side upper connecting member 61 via the container-side upper connecting member 11, and at the same time, the rear part of the container 1 is
Is lifted as follows. That is, the container-side lower connecting member 16 is stationary with respect to the ground by the carrier-side lower connecting member 91 that remains stationary.
As shown in FIG. 10 (b), when the container body 2 rises, the container-side lower connecting member 16 lowers relatively to the container body 2, and the movement is transmitted to the support member 3 by the chains 21 and 40. Then, the support member 3 protrudes downward and raises the rear part of the container 1. That is, the front part of the container 1 is lifted by the container-side upper connecting member 11, and the rear part is lifted by the support member 3, and the movement is synchronized, so that the container 1 rises in the horizontal direction. When the main girder 32 provided at the lower portion of the main body 2 of the container 1 becomes substantially the same level as that of the subframe 47 of the carrier 45, the operation switch 260 is returned to the normal state, and the direction control valve 242 is switched to the neutral position. Then, the operation of the hydraulic cylinders 71, 71 is stopped to stop the upward movement. Next, with the brake of the carrier 45 released and the transmission neutral, the contact F of the operation switch 260 is closed, and the solenoid 243a is operated.
To switch the direction control valve 243 to the operating position where the cross flow path is formed. And the hydraulic motor on the column device 51
59 is driven to move the column device 51 forward relative to the chassis frame 47. At this time, since the support member 3 is supported by the lower end grounding member 7 and does not move in the horizontal direction with respect to the ground at the rear portion of the container 1, the carrier 45 side is pulled backward by the chain 58 as shown in FIG. Be moved. Even if the operator operates the operation switch 260 to operate the contact point U or D during the horizontal movement, the limit switches 270 and 271 at the front end and the rear end of the sub-frame 47 are in the normal state.
The operation position of the direction control valve 242 does not switch. Therefore, the hydraulic cylinder 71 or 96 is not driven, and the front part and the rear part of the container 1 are kept at the same height. When the horizontal movement of the carrier 45 is completed, and the container 1 is placed on the carrier 45,
The operation of closing the contact D of 260 is performed to switch the direction control valve 242 to the operating position of the straight flow path. In this state, the contact NO of the limit switch 270 at the front end of the sub-frame 47 is ON, so that the solenoid 242b can be energized and the direction control valve 242 can be switched. And the piston rod 96 of the hydraulic cylinder 96
The carrier side lower connecting member 91 is raised by contracting a. At this time, the piston rod 71a of the hydraulic cylinder 71 tries to contract, but the carrier-side upper connecting member 61 is held at the height of the container-side upper connecting member 11 because it is connected to the container-side upper connecting member 11. . Therefore, the sprockets 82, 86 and the like are vertically restrained by the chains 85, 84, and are held at the same height. Therefore, the piston rod 71a of the hydraulic cylinder 71 remains expanded even if it receives the hydraulic pressure to be simultaneously contracted by the operation of the operation switch 260. Then, as shown in FIG. 10 (d), the container-side lower connecting member 16 connected to the carrier-side lower connecting member 91 is raised, and the chain 2
The support member 3 is lifted from the ground by 1,40. When the container 1 is unloaded from the carrier 45, the procedure is exactly the same as that described above.

Thus, the container handling vehicle can load and unload the container 1 on the carrier 45 while maintaining the horizontal posture. In addition, 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 disconnected in accordance with the unloading operation. further,
At the time of loading, the carrier 45 is pulled backward through the chain 58 by driving the hydraulic motor 59 of the column device 51 with the transmission in a neutral state, so that the speed of movement is reduced. It is easier to control and slow down. By reducing the moving speed, the carrier 45 and the container 1 can be prevented from colliding and being damaged.

Also, the subframe 4 laid on the chassis frame 46
The column device 51 can be moved back and forth through one chain 58 between 7, 47
The groove width of the grooves 47 and 47 may be a minimum width enough to allow the chain 58 to pass therethrough, and can be made narrower than before, so that the overall height of the carrier 45 can be reduced.

Also, a hydraulic motor 59 for moving the column device 51 in the front-rear direction, hydraulic cylinders 71 for moving the carrier-side upper connecting member 61 in the vertical direction, and a carrier-side lower connecting member 91
Are provided on the column device 51 together with the direction control valves 242 and 243, so that the pipes 249 and 250 from the hydraulic pump 48 side can be integrated into one system.

Further, since the hydraulic cylinders 71, 71 and the hydraulic cylinders 96, 96 are connected in parallel and controlled by the same directional control valve 242, the carrier-side upper connecting member 61 and the carrier-side lower connecting member 96 are When moving the hydraulic cylinder in the vertical direction, it is possible to prevent an operation error such as a wrong hydraulic cylinder to be driven.

Further, the limit switch 27 which is turned on when the column device 51 is located at the front or rear portion on the sub-frame 47.
0,271 are provided at the front end and the rear end of the sub-frame 47,
Operation switch 2 for controlling switching of the direction control valve 242
Since 60 is connected in series to the limit switches 270 and 271 respectively, even if the operator operates the operation switch 260 by mistake while moving the container 1 horizontally relative to the carrier 45, The height of the front part or the rear part of the container 1 can be kept unchanged. Therefore, the container 1 can be prevented from tilting, and the load in the container 1 can be prevented from falling down.

<Effects of the Invention> As is apparent from the above description, the container loading and unloading vehicle of the present invention can load and unload containers while maintaining the horizontal posture, and furthermore, the loading and unloading on the vehicle in accordance with the unloading operation. The arm and the container can be automatically connected or disconnected.

Further, the carrier of the container handling vehicle according to the present invention operates when the column device is located at the rear portion on the sub-frame, but is inoperative when the column device is located at a position other than the rear portion on the sub-frame. A limit switch, a front limit switch that operates when the column device is located at the front on the subframe, and is deactivated when the column device is at a position other than the front on the subframe; An operation switch is provided which enables the drive unit to move the carrier-side upper connecting member and the carrier-side lower connecting member up and down only when the rear limit switch or the front limit switch is operated. The container can be prevented from tilting even if a user makes a mistake, and the load inside the container can be prevented from falling down. Can.

[Brief description of the drawings]

FIG. 1 is a diagram showing a container cargo handling vehicle according to one embodiment of the present invention as viewed from the side, FIG. 2 is a diagram showing a carrier of the container cargo handling vehicle as seen obliquely from the rear, FIG.
The figures show the container of the container handling vehicle as viewed obliquely from the front, and FIGS. 4, 5, and 6 show the column device of the container handling vehicle as viewed from the side, rear, and front, respectively. , FIG. 7 is a diagram showing a hydraulic circuit of the container cargo handling vehicle, FIGS. 8 and 9 are diagrams showing an electric circuit of the container cargo handling vehicle, respectively, and FIGS. 10 (a) to (d) are FIG. 11 is a view for explaining the operation of loading the container on the carrier of the container handling vehicle, FIG. 11 is a view showing the carrier of the conventional container handling vehicle viewed obliquely from the rear, and FIGS. It is a figure explaining operation | movement which loads a container to the carrier of the said conventional container handling vehicle. DESCRIPTION OF SYMBOLS 1 ... Container, 2 ... Container main body, 3 ... Support member, 11 ... Container side upper connection member, 16 ... Container side lower connection member, 17 ... Engagement 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
…… Sub-frame, 51 …… Column device, 59 …… Hydraulic motor, 61 …… Carrier side upper connecting member, 63,95 …… Clevis, 65 …… Connecting pin, 69 …… Working pin, 71,96 …… Hydraulic cylinder, 71a, 95a: Piston rod, 91: Lower connecting member on carrier side, 203: Rotating piece, 204: Torsion spring, 205: Lock piece, 209: Connecting plate, 242, 243: Direction control Valve, 242a, 242b, 243a, 243b …… Solenoid, 249,2
50,251,252,253,251 …… Hydraulic piping, 260 …… Operation switch, 270,271 …… Limit switch, 300 …… Battery.

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-54-77913 (JP, A) JP-A-48-100810 (JP, A) JP-A-49-33306 (JP, A) 83541 (JP, U) Japanese Patent Publication No. 57-39975 (JP, B2) Japanese Utility Model Publication No. 50-39534 (JP, Y2) (58) Fields investigated (Int. Cl. ⁶ , DB name) B60P 1/64

Claims (1)

(57) [Claims] 1. A container comprising a container and a carrier, wherein the container is provided with a vertically movable support member provided at a rear portion of the container body, a container-side upper connecting member provided at a front portion of the container body, and the container body. A container-side lower connecting member movably provided at the front of the container,
A transmission device for transmitting the operation of the container-side lower connection member to the support member to move the support member up and down, wherein the carrier is a column device provided to be movable back and forth on a sub-frame mounted on a chassis frame. A carrier-side upper connecting member that is vertically movable on the column device and is connected to the container-side upper connecting member; and a carrier-side upper connecting member that is vertically movable on the column device and is connected to the container-side lower connecting member. In a container cargo handling vehicle provided with a carrier-side lower connecting member and a driving unit provided in the column device for vertically moving or stopping the carrier-side upper connecting member and the carrier-side lower connecting member, the carrier may include: the column; Activates when the device is located at the rear on the subframe, while the column device is A rear limit switch that is deactivated when there is a position other than the rear portion; and a rear limit switch that is activated when the column device is located at the front on the subframe, while the column device is at a position other than the front portion on the subframe. A front limit switch that is not operated, and an operation switch that enables the driving means to vertically move the carrier-side upper connecting member and the carrier-side lower connecting member only when the rear limit switch or the front limit switch is operated. A container cargo handling vehicle comprising: