JPH03136935A - Container loading vehicle - Google Patents

Abstract

PURPOSE:To prevent the inclination of a container by providing a limit switch to be operated when a column device is placed on a rear position of a subframe and another switch, to be operated only during the operation of the limit switch, of a driving means to move up and down connecting members provided on an upper portion and a lower portion of a carrier respectively. CONSTITUTION:An oil hydraulic motor on a column device 51 is operated to move the column device 51 forward of a chassis frame 47. Even when an operator operates a switch 260 to contact U or D during the horizontal movement, as respective limit switches 270 and 271 on the front end and the rear end of the subframe 47 are kept in normal state, the operating position of a direction control valve 242 cannot be changed. Therefore, respective oil hydraulic cylinders 71 or 96, for driving a carrier side upper connecting member 61 and a carrier side lower connecting member 91, cannot be operated to keep the front portion and the rear portion of a container 1 in equal level.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a container handling vehicle that loads and unloads containers while maintaining a horizontal attitude using a handling arm.

<Prior Art> Conventionally, there is a container handling vehicle as shown in FIG. 11. This container handling vehicle 145 has sub-frames 147, 147 made of channel steel mounted on a vehicle body (chassis frame) 146 in the front-rear direction in parallel with each other and with the grooves facing inward. The above subframe 147,1
A column device 151 is provided on 47 so as to be movable in the front and back direction shown by arrow X. This column device 151 is attached to the subframes 147, 147 by sandwiching the upper sides of the subframes 147, 147 between slide pads 152, 152 from both upper and lower sides.
It is designed to slide along the top edge of 7. The column device 151 is a column 155 made of a pair of channel steel.
, 155, and the lower ends of the columns 155, 155 are connected by a bottom plate (not shown). This bottom plate is connected to the sprocket 15 provided at the front and rear of the Sharn frame 146 between the sub-frames 147, 147.
It is fixed to a chain 15B that wraps around 6°157.

The front sprocket 157 is directly driven by a hydraulic motor 159 provided at the front of the chassis frame 146. Therefore, this hydraulic motor 159
By activating the chain 158, the column device 151 can freely move in the front and rear direction indicated by the arrow X.

On the other hand, on the rear surfaces of the columns 155, 155, a carrier-side upper connecting member 161 and a carrier-side lower connecting member 9I are provided as cargo handling arms so as to be movable up and down in the vertical direction indicated by arrow Z. This carrier-side upper connecting member 161 consists of rollers 164, 164, 16 provided at the four corners of a U-shaped flat plate 162.
4,164. It is now possible to run up and down along the column 55.55. A hook 163 is fixed to the center of the flat plate 162. Column 155 above
155, two hydraulic cylinders 171 (only one side is shown) are provided on the left and right sides, and each hydraulic cylinder 171
The tips of the piston rods 171a are connected by a shaft 181, and sprockets 1 are connected to both ends of the shaft 181, respectively.
82, 182 and rollers 183, 183 are attached. The rollers 183, 183 roll in grooves in the columns 155, 155 and guide the vertical movement of each piston rod 171a. Further, chains 184, 184 fixed to one end of the tube of the hydraulic cylinder 171 are wound around the sprockets 182, 182, suspended downward, and connected to the U-shaped flat plate 162 of the upper connecting member 161. Therefore, by extending the piston rod 171a of each hydraulic cylinder 171, the upper connecting member 161 can be pulled up by the chains 184, 184, and by contracting the piston rod 171a of each hydraulic cylinder 171, the upper connecting member set can be prevented from descending by its own weight. The carrier side lower connecting member 191
A pair of clevises 195 are attached to 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 and facing rearward. A pin 196 that can be inserted into the clevises 195, 195 is attached to the member 192 with a wire. The lower connecting member 191 is connected to the tips of piston rods 197a of a pair of hydraulic cylinders 197 (only one side is shown) provided on the sides of the columns 155, 155.
By operating the lower connecting member 191, the lower connecting member 191 can be driven in either the up or down direction. In addition, the hydraulic motor 159 and each hydraulic cylinder 171, 19
7 are each provided with a control valve to control these operations,
Hydraulic pump 14 provided on the side of shearn frame 146
Oil is supplied from 8 through hydraulic piping (not shown) via each control valve, and each control valve is operated to drive each control valve independently of the other.

When loading a container onto this container handling vehicle 145, first, as shown in FIG. The carrier side lower connecting member 191 and the container side lower connecting member 116 provided at the front part of the container 101 so as to be movable up and down are connected. 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 expanded.

Then, as shown in FIG. 12(b), the hydraulic cylinder 1
By extending the piston rod 171a of 71, 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 116 are raised. to remain stationary with respect to the ground.

Then, the container-side lower connecting member 116 is lowered relative to the container body 102, and this movement is transmitted by the chain 121 to cause the support member 103 to protrude downward and raise the rear part of the container 101. That is, the front and rear parts of the container 101 are raised horizontally in synchronization. When the main girder 132 provided on the lower surface of the container 101 is at approximately the same level as the subframe 147, the first
As shown in FIG. 2(C), the hydraulic motor 1 shown in FIG.
59. Then, the column device 151 is moved forward via the chain 158, and the container 101 is moved horizontally (the rear part of the container 101 is
03).

When the loading is completed, as shown in FIG. 12(d), the piston rod 19 of the hydraulic cylinder 197 is
By contracting 7a, the carrier-side lower connecting member 191 and the container-side upper connecting member 116 are raised, and the support member 103 is raised via the chain 140. Incidentally, when the container 101 is unloaded from the vehicle 145, the operation is completely reversed to that described above.

<Problems to be Solved by the Invention> By the way, the above-mentioned conventional container handling vehicle is
A hydraulic motor 159 for horizontally moving the container 1 in the front-back direction and hydraulic cylinders 171 and 197 for raising and lowering the container 1 are driven independently of each other. For this reason, while the container 101 is being moved horizontally by driving the hydraulic motor 159 as shown in FIG. 12(c), the operator may mistakenly operate the hydraulic cylinder 197. If the hydraulic cylinder 197 is erroneously contracted, the chain 121 that was protruding the support member 103 of the container 101 will become loose, and the support member 103 will be stored in the rear column 105. As a result, the rear of the container 101 will be descend. On the other hand, the front part of the container IO1 rests on the subframe 147 and remains at the same height. Therefore, there is a problem in that the container 101 as a whole tilts with respect to the ground, and the loaded items in the container 101 fall down.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a container handling vehicle that can prevent a container from tilting even if an operator makes an erroneous operation during horizontal movement, and which prevents the cargo inside the container from falling over. be.

<Means for Solving the Problems> In order to achieve the above object, the present invention includes a column device provided so as to be movable back and forth on a subframe mounted on a chassis frame, and a column device provided on the column device so as to be movable up and down. a carrier-side upper connecting member that is attached to the column device and is removably connected to the container-side upper connecting member; and a carrier-side lower connecting member that is provided on the column device so as to be movable up and down and is removably connected to the container-side lower connecting member. , a container cargo handling vehicle equipped with a drive means for vertically moving the carrier-side upper connecting member and the carrier-side lower connecting member; a limit switch that operates when the column device is located at a rear portion on the subframe; The present invention is characterized in that it includes an operation switch that enables the driving means to operate only when the switch is activated.

<Operation> When the column device is located at the rear on the subframe, the limit switch is activated. Therefore, by operating the operation switch connected to the limit switch, the drive means operates in the same manner as in the conventional case. That is, when the column device is located at the rear on the subframe, the carrier-side upper connecting member moves upward or downward, while the carrier-side lower connecting member remains stationary with respect to the ground, and the container rises horizontally. Or descend.

On the other hand, when the column device is located in the middle on the subframe, the limit switch does not operate. Therefore, even if the operator accidentally operates the operation switch while horizontally moving the container, the drive means will not operate. Therefore, the carrier side upper connecting member or the carrier side lower connecting member does not move up and down.
The front and rear of the container are kept at the same height. Therefore, the container is prevented from tilting, and the loaded items within the container are prevented from falling over.

<Example> Hereinafter, a container cargo handling vehicle of the present invention will be described by way of an example.

FIG. 1 shows a container 1 loaded onto a container cargo handling vehicle (hereinafter referred to as a "carrier") 45 according to an embodiment of the present invention.

As shown in FIG.
are attached parallel to each other in the front-rear direction with the grooves facing inward. A column device 41 is provided on the sub-frame 47, 47 so as to be movable in the front and back direction shown by arrow X. 4, 5, and 6 respectively show the above column device 5.
1 laterally.

Shown are views from the rear and front. This column device 51 connects the upper side of the side frame 47.47 to the channel steel 53.53 from both upper and lower sides via slide pads 52.52.
It is designed to slide along the upper side of the side frame 47 and 47 by sandwiching them respectively. The above column device 5
1 is a column 55 made of H-shaped steel on channel steel 53.53
There are two pairs on the left and right, the upper ends of which are connected to each other by a top plate 70, and the lower ends of which are connected by a bottom plate 80 as shown in FIG. Further, a hydraulic motor 59 is provided on the bottom plate 80 on the front side of the column 55, and a sprocket 57 is provided on the rotating shaft of this hydraulic motor 59, and the sprocket 57 is placed on the front and back of the sprocket 57 directly below the bottom plate 80, that is, at the level of the upper side of the subframe 47. Sprockets 54 and 56 are provided at the respective positions. A chain 58 is passed around the three sprockets 54, 56 and 57. The chain 58 has one end 58a fixed to the center portion 49a of the plate 49 connecting the front ends of the subframes 47.47, passes between the subframes 47.47, and is bent upward by the sprocket 54 from the front and rear directions. The other end 58 is bent downward and rearward by the shaft 48 connecting the rear ends of the sub-frames 47 and 47, respectively, to the center portion 46a of the rear end of the chassis frame 46.
b is fixed. The groove width of the sub-frames 47, 47 is set to the minimum width that allows the chain 58 to pass through, so that the overall height of the carrier 45 is kept low.

By driving the hydraulic motor 59 in either direction of rotation, the column device 51 can be freely moved forward or backward along the chain 58.

On the other hand, at the rear of the column 55.55, a carrier side upper connecting member 61. The carrier-side lower connecting members 91 are provided so as to be movable up and down in the vertical direction indicated by arrow Z, respectively. The carrier side upper connecting member 61 consists of a pair of plates 62. and 62. which have an L-shaped cross section and are connected at the top and bottom by horizontal rods 66.88, respectively.
62, a clevis 63 attached to the horizontal rod 67 that connects the central portions of the horizontal rods 66.88, a connecting pin 65 that can be connected to both sides of the clevis 63, and a pair of left and right arms 68.68. and an operating pin 69°69. The clevis 63 is attached with the concave portion facing rearward. Also, one end of the arm 68 is connected to the vertical rod 6.
A connecting pin 651 and an operating pin 69 are attached at the other end of the arm 68, approximately at the center thereof.
Each upper part of the arm 68 is attached to the arm 68 so as to be rotatable and with some play in the longitudinal direction. The connecting pin 65 connects the clevis 63 by rotating the arm 68 by its own weight about the shaft 68a as a fulcrum when the operating pin 69 is not pressed upward by a rod 92 (described later) of the carrier side lower connecting member 91. When the carrier-side upper connecting member 61 and the carrier-side connecting member 91 are in vertical contact with each other and the operating pin 69 is pressed upward by the rod 92, this action causes it to detach upwardly from the clevis 63 and connect. is designed to be released.

Inside the column 55.55, a pair of hydraulic cylinders 71.71 are erected with the lower ends of their tubes fixed to the bottom plate 80 with pins 74, and the upper ends of the piston rods 71a, 71a of the hydraulic cylinders 71.71 are attached to the shafts. While connecting at 75,
Sprockets 82 and 82 are attached to both ends of this shaft 75, respectively.

Further, a pair of support members 73.degree. 73 are vertically attached to substantially the center shaft of the shaft 75, and a sprocket 86 is attached between the lower ends of the support members 73.degree. 73. A pair of chains 84.84 fixed near the lower end 81 of the tube of the hydraulic cylinder 71.71 is connected to the sprocket 82.82.
is wound around the sprocket 86 and connected to both ends 88a, 88a of the horizontal rod 88 of the carrier side upper connecting member 61, while the chain 85 fixed to the center part 70a of the top plate 70 is wound around the sprocket 86 The upper horizontal rod 88 extends upward and is connected to the central portion 88b of the upper horizontal rod 88.

Therefore, the piston rod 7 of the hydraulic cylinder 71
When 1a is extended, sprocket 82.82, shaft 7
5. The support members 73, 73 and the sprocket 86 can be raised together, and the carrier side upper connecting member 61 can be pulled up with the chain 84, while the chain 8
5 allows the carrier-side connecting member 61 to rise while the sprocket 86 is wound and restrained. Further, 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. Note that this carrier-side connecting member 61 is enabled to run up and down between the left and right columns 55 along the inner groove of the column 55 by a roller 64 attached to the side surface of the plate 62.

On the other hand, the carrier side lower connecting member 91 is connected to the column 55.
A pair of side plates 97, 97 covering the sides of the side plate 97,
a pair of upper and lower rods 92 and 93 that horizontally connect the rods 97;
Clevis 95 attached to the center of these rods 92, 93
It is equipped with Further, this clevis 95 is provided with a pair of rotating pieces 203, 203, and a torsion spring 204 as a resilient member.
and a pair of lock pieces 205, 205 are attached. The clevis 95 is attached with a U-shaped recessed portion facing rearward and horizontally with its tip protruding. The above lock piece 10
5 is configured to be able to freely rotate around a shaft 95b provided at the top end of the clevis 95, and hang down in the vertical direction due to its own weight, thereby closing at least a portion of the recessed portion of the clevis 95. The rotating pieces 203, 203 are formed of abbreviated plates, and a portion corresponding to the short side of L is attached to a shaft 95a provided above the clevis 95 in the vicinity of the connecting rod 92. And the rotating piece 203.2
03 is provided with a connecting plate 209 that connects the long sides of the left and right L so that they can rotate together around the axis 95a,
The torsion spring 104 always biases it clockwise in FIG. 4. In addition, the carrier side upper connecting member 6
1 and the carrier side lower connecting member 91 vertically abut,
When 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 come into contact with the rotatable locking piece 205 at all. Therefore, the lock piece 205 is in a state of rotation around the shaft 95b, and the recessed portion of the clevis 95 is in an open state, that is, a state in which 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 and the clevis 63 is separated from the connecting plate 209, the rotating pieces 203, 203
The connecting rod 92 is biased by the connecting rod 92, rotates clockwise, comes into contact with the side surface of the connecting rod 92, and is locked. At this time, the rod piece 205 is allowed to rotate clockwise in FIG. 4, but as the rotating piece 203 comes into contact with the upper part, the rod piece 205 is prevented from rotating counterclockwise, that is, the rod piece 205 is in a connected state. .

This carrier side lower connecting member 91 is connected to the column 55.55.
The lower end of a piston rod (facing downward) 91a of a hydraulic cylinder 91 is fixed to the rear surface with a bracket 94. Further, sliding members 99,99 are provided inside the side plates 97°97, so that the carrier side lower connecting member 91 is connected to the piston rod 91 of the hydraulic cylinder 91.
By expanding and contracting, it is possible to move up and down along the column 55.

Hydraulic motor 59 on the column device 51. Hydraulic cylinders 71.71 and 96.96 are driven by a hydraulic circuit shown in FIG. This hydraulic circuit includes a hydraulic pump 148, a tank 240, a filter 241, a directional control valve 242 for driving a hydraulic cylinder having 6 points and 3 positions, and a directional control valve 242 for driving a hydraulic motor also having 6 points and 3 positions. direction control valve 243 and check valve 2
45, 246, and flow control valves 247, 248 connected to each boat of the hydraulic motor 59, respectively.

Hydraulic pump 48. Tank 240 is conventionally provided on the side of chassis frame 46.

The directional control valves 242 and 243 are provided in the column device 51, and the hydraulic cylinders 71, 71, 96.96 are connected in parallel in the column device 51, and a pair of ports of the directional control valve 242 are connected to the hydraulic cylinders 71, 71, 96.96 in parallel. Piping 251,2
52, while the flow control valves 247 and 248 connected to the port of the hydraulic motor 59 and the directional control valve 24
A pair of piping 253, 254 connects the port No. 3 with the port No. 3.

Directional control valves 242 and 243 in the column device 51
A pair of reciprocating pipes 249, 2 that combine the hydraulic pump 48 and tank 240 on the side of the chassis frame 48 into one system.
Connected with 50. The directional control valves 242, 243 have solenoids 242a, 242b; 243a,
243b moves the spool to switch the operating position, and solenoids 242a and 243a
When the solenoids 242b and 243b are energized, they form an intersecting flow path, while when the solenoids 242b and 243b are energized, they form a straight flow path. Each solenoid 242a, 242b, 2
43a and 243b are controlled by electric circuits shown in FIGS. 8 and 9. As shown in FIG. 9, this electric circuit includes a 24V battery 300, a limit switch 270 and a limit switch 271 each having one normally oven contact NO and one normally closed contact NG, and four normally oven contacts. Contacts U, D,
An operation switch 260 having F and B is provided. The limit switches 270 and 271 are provided at the front and rear ends of the subframe 47, respectively, as shown in FIG. The limit switch 270 is activated when the column device 51 is located at the front of the subframe 47.
1, the normally oven contact NO closes, while the normally closed contact NG opens. When the column device 51 is located at the rear of the subframe 47, the limit switch 271 contacts the rear surface of the column device 51 to close the normally oven contact No. while opening the normally closed contact NC. . The operation switch 260 is provided in the driver's seat of the vehicle 45, and an operator can operate the contacts U and D.

Either contact F or B can be closed arbitrarily. Then, the battery 300 is connected to the limit switch 270.
．． 27H7) Connect to each contact No., NC, NO, NC,
The normal oven contact No. and No. of the limit switches 270 and 271 are connected to the operation switch 260 using common wiring.
while connecting to contacts U and D of limit switch 2.
The contact NO of the limit switch 271 is operated by the contact F of the switch 260, and the contact NG of the limit switch 271 is operated by the switch 260.
are independently connected to the contacts B of the operating switch 260, and further, the contacts U, D, F, and B of the operation switch 260 are connected to the solenoids 242a, 242b, 243a, and 243b, respectively. In this way, each solenoid 242a, 242
b, limit switch 270 or 2 for 243a
71 and the operation switch 260 are connected in series. Note that a protection diode 244 is provided in parallel to each solenoid. 261 is a bendable support band that prevents the internal cable from bending. When the column device 51 is at the front of the subframe 47, the limit switch 270
Contact NO is closed, contact NC is open, limit switch 27
Contact NO.1 is open and contact NC is closed (normal state). Therefore, at this time, by closing contacts U, D, or B of the operation switch 260, the solenoid 2
42a, 242b or 243b can be energized, while closing contact F cannot energize solenoid 243a. That is, the directional control valve 242 can be switched from a neutral position to an operating position that forms a crossing flow path or a straight flow path, or the directional control valve 243 can be switched from a neutral position to an operating position that forms a straight flow path.

However, the directional control valve 242 cannot be switched from the neutral position to the operating position forming a straight flow path. on the other hand,
When the column device 5I is located at the rear of the subframe 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 in the open state. Therefore, at this time, the contact U of the operation switch 260,
Solenoid 242a by closing D or F;
242b or 243a can be energized, while
Even if contact B is closed, the solenoid 243b cannot be energized. That is, although the directional control valve 242 can be switched from a neutral position to an operating position that forms a crossing flow path or a straight flow path, or the directional control valve 243 can be switched from a neutral position to an operating position that forms a crossing flow path, the directional control valve 243 cannot be switched from the neutral position to the operating position forming a straight flow path. Further, when the column device 51 is in the intermediate position of the subframe 47, both the limit switches 270 and 271 are in the normal state.

Therefore, at this time, by closing contact F or B of operation switch 260, solenoid 243a or 2
43b can be energized, while closing contacts U or D cannot energize solenoid 242a or 242b. That is, although the direction control valve 243 can be switched from the neutral position to any of the above operating positions, the direction control valve 242 cannot be switched from the neutral position to any of the operating positions. When the directional control valves 242, 243 are both in the neutral position as shown in FIG.
This direction control valve 24 passes through the direction control valves 242 and 243.
3 and tank 240, and is vented directly to tank 240 through piping 250. On the other hand, solenoid 2
43b is energized and the directional control valve 243 is in the operating position forming a straight flow path, the oil flows through the check valve 246,
Directional control valve 243. Piping 253. Flow rate control valve 247, hydraulic motor 59. Flow control valve 248. It passes through the piping 254 and the directional control valve 243 in order and returns to the tank 240, so that the hydraulic motor 59 can be driven in either direction of rotation. In this case, the column device 51 moves rearward with respect to the subframe 47. When the solenoid 243a is energized and the directional control valve 243 is in the operating position forming a cross flow path, the flow of oil from the pipe 253 to the pipe 254 is reversed, thus driving the hydraulic motor 59 in the opposite direction. be able to. In this case, the column device 51 moves forward with respect to the subframe 47. Further, the solenoid 242b is energized and the directional control valve 2
42 is in the operating position forming a straight flow path, the oil flows through the check valve 245, the direction control valve 242 and the piping 251.
Through the piston head in each tube of the hydraulic cylinder 71, 71.96.96 1a, 71a, 95a, 9
When the solenoid 242a is energized and the directional control valve 242 is in the operating position forming a cross flow path, the oil flows into the piston in the tube. Heads 71a, 7
lb, 96b, 96b side and pressurizes each piston rod 71a, 71a, 96a96a in a direction to simultaneously extend it. In this way, the hydraulic motor 59 is driven by the directional control valve 243, the hydraulic cylinders 71.71 and 96.96 are driven by one directional control valve 242, and the two control valves 242 and 243 are driven by one directional control valve 243. It is controlled by an operation switch 260.

As shown in FIG. 3, the container 1 includes a box-shaped container main body 2, a columnar support member 3.3, and a container-side upper connecting member 11. It includes a container-side lower connecting member 16 and chains 21 and 40. The container body 2 has a symmetrical rear column 5.5 and a front column 1.
3.13, side column 30 (only one side shown), rear beam 4, front beam 14, upper side frame 10°lO, lower side frame 9.9, front panel 12, bottom plate 19 , legs 20, 20, and a top plate and peripheral panels (not shown).

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.

Each of the support members 3.3 is fitted into the rear column 5.5 so as to be able to rise and fall freely, and has a rectangular plate-shaped grounding member 7 attached to its lower end. The lower parts of the support members 3, 3 are connected by the same shaft 8 so that they can be raised and lowered in synchronization with each other. The container side upper connecting member 11 is a semicircular member, and both ends thereof 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 perpendicularly to the rectangular plate 17b. The container side upper connecting member 16 is connected to the rectangular plate 17a of the engaging member 17 and the channel-shaped sliding member 1.
It is configured in a shape that intersects the groove portions of No. 8. and,
A pair of guide members 15.15 made of channel steel are erected in parallel with a gap in the grooves 12a of the front panel 12 and the front beam 14 with the grooves facing inward, and the engagement is made in the gaps. 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 member 15.15. Therefore, the container side upper connecting member 16
The whole can slide up and down. A pair of chains 21 are provided symmetrically (only one side is shown in the figure), and one end is attached to the side of the sliding member 18, and the chains 21 are inserted into the front beam 14 and provided in the beam 14. A sprocket 25 is bent horizontally from above and downward from the horizontal direction by a pair of sprockets 23 and 24, and is further inserted into the front column 13 and provided at the bottom of this column 13.
It is bent from the vertical direction to the front-back direction, inserted into the lower side frame 9, and is extended upward from the front-back direction by a sprocket 26 provided at the rear end of this side frame 9, and connected to the upper part 3a of the support member 3. ing. Also,
The chain 40 has one end connected to the lower part of the engagement member 17, extends vertically at the front of the container body 2, and is moved from the vertical direction to the front and rear by a sprocket 42 provided at the lower front end of the container body 2. It is bent to pass under the bottom plate 9, and further bent in the vertical 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 via the chain 21, and the chain 40 is loosened to allow the shaft 8 to descend. That is, the support member 3 can be allowed to descend. Conversely, when the container side lower connecting member 16 is moved upward from the lower end position, the chain 40 pulls up the support members 3, 3 via the shaft 8, while the chain 21 allows the support members to rise. It will loosen as it does.

When loading the container l onto the container handling vehicle 45, it is carried out as follows.

Now, the carrier 45 and the container 1 are shown in Fig. 1θ (a).
The column device 51 is in the state shown in FIG.
The container-side lower connecting member 16 is in the raised position, and the support member 3 is recessed into the rear column 5. Further, the piston rods 71a, 71a of the hydraulic cylinders 71. It is assumed that the clevises 63 and 95 abut each other at their lowest points, so that the clevises 63 and 95 are each in a disconnected state. Further, the operation switch 260 shown in FIGS. 8 and 9 is in the 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 connecting member 11 is fitted into the recess of the clevis 63 of the carrier side upper connecting member 61.

Since the clevis 63 has the connecting pin 65 removed,
Can be easily fitted. Furthermore, the engaging member 17 of the container-side lower connection member 16 is fitted into the recess of the clevis 95 of the carrier-side lower connection member 91 . The lock piece 205 of the carrier-side lower connecting member 91 is simply suspended by its own weight and is rotatable, so the upper connecting member 61
．． Similar to No. 11, it can be easily fitted. Next, the contact U of the operation switch 260 is closed to switch the directional control valve 242 to the cross flow path operating position. At this time, contact No. of the limit switch 271 provided at the rear end of the subframe 47 is on, so the solenoid 242
A is energized and switched. And the hydraulic cylinder 71
．． 71 piston rods 71a, 71a are extended,
The carrier side upper connecting member 61 is pulled up by the chain 84 together with the sprockets 82, 86, etc. and raised. In addition,
The lower part of the sprocket 86 is restrained by a chain 85. On the other hand, by the above operation of the operation switch 260, the piston rod 96 of the hydraulic cylinder 96 is
Since the carrier side lower connecting member 91 is simultaneously receiving the hydraulic pressure to be extended, 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 separates 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 closed by the locking piece 105.
automatically blocked by. That is, the carrier side upper connecting member 61 and the container side upper connecting member 11. The carrier-side lower connecting member 91 and the container-side lower connecting member 16 are automatically connected. Then, the front part of the container l is lifted by the carrier side upper connecting member 6I via the container side upper connecting member 11, and at the same time, the rear part of the container l 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 due to the carrier side lower connecting member 91 remaining stationary, FIG.
), when the container main body 2 rises, the container side lower connecting member 16 descends relative to the container main body 2, and this movement is transmitted to the support member 3 by the chains 21 and 40, and the support member 3 protrudes downward and raises the rear part of the container l. That is, the front part of the container l is lifted up by the container-side upper connecting member 11, and the rear part is lifted up by the support member 3, and their movements are synchronized, so that the container l rises in the horizontal direction. When the main girder 32 provided at the bottom of the main body 2 of the container l reaches approximately the same level as the subframe 47 of the carrier 45, the operation switch 260 is returned to the normal state and the directional control valve 242 is set to the neutral position. The switch then deactivates the hydraulic cylinders 71, 71 to stop the upward movement. Next, with the brake of the carrier 45 released and the transmission in neutral, an operation is performed to close the contact F of the operation switch 260,
The solenoid 243a is energized to switch the directional control valve 243 to an operating position that forms a cross flow path. Then, the hydraulic motor 59 on the column device 51 is driven so that the column device 51
is moved forward relative to the chassis frame 47. At this time, the container! Since the rear part of the carrier 45 is supported by the lower end grounding member 7 of the support member 3 and does not move horizontally with respect to the ground, the carrier 45 side is pulled rearward by the chain 58 and moves as shown in FIG. 1O(c). During this horizontal movement, the operator
Even if the contact U or D is operated by operating the limit switch 270 at the front end and rear end of the subframe 47,
and 271 are in the normal state, the operating position of the directional control valve 242 will not change. Therefore, the hydraulic cylinders 71 or 96 are not activated and the front and rear parts of the container I are kept at the same height. After the horizontal movement of the carrier 45 is completed, with the container 1 placed on the carrier 45, an operation is performed to close the contact of the operation switch 260, and the direction control valve 24 is closed.
2 to the operating position of the straight flow path. Note that in this state, the limit switch 27 at the front end of the subframe 47
Since contact No. 0 is on, solenoid 242b
The directional control valve 242 can be switched. Then, the piston rod 96a of the hydraulic cylinder 96 is contracted to raise the carrier side lower connecting member 91. 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, sprocket 82.86
etc. are chain 85. It is restrained vertically by a chain 84 and held at the same height. Therefore, the piston rod 71a of the hydraulic cylinder 71 is connected to the operation switch 260.
Even if it is simultaneously subjected to the hydraulic pressure that should be contracted by the above operation, it remains in an expanded state. And Figure 1O (d
), the container-side lower connecting member 16 connected to the carrier-side lower connecting member 91 is raised, and the support member 3 is pulled up from the ground by the chain 21.40. Note that when unloading the container l from the carrier 45, the procedure is completely reversed to that described above.

In this way, this container handling vehicle can load and unload the container l onto the carrier 45 while maintaining a horizontal attitude. Furthermore, 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 loading and unloading operation.

Furthermore, during the above-mentioned loading, the carrier 45 is placed in the column device 5 with the transmission in neutral.
By driving the first hydraulic motor 59, it is pulled backward via the chain 58, making it easy to control and slow down the speed of movement. By slowing down the speed of movement, it is possible to prevent the carrier 45 and the container l from colliding and being damaged.

In addition, the subframe 4 laid on the chassis frame 46
7.47, the column device 51 can be moved in the front and back direction through one chain 58, so the groove width of the subframe 47.47 should be the minimum width that allows the chain 58 to pass through. It is possible to make the carrier 45 narrower than before, and therefore, the overall height of the carrier 45 can be reduced.

Also, a hydraulic motor 59 that moves the column device 51 in the front-back direction, a hydraulic cylinder 71.71 that moves the carrier-side upper connecting member 61 in the vertical direction, and a hydraulic cylinder 96 that moves the carrier-side lower connecting member 91 in the vertical direction. ．．
96 to the column device 51 together with the directional control valves 242 and 243.
Since it is provided on the top, the piping 24 from the hydraulic pump 48 side
9 and 250 can be combined into one system.

In addition, the hydraulic cylinder 71.71 and the hydraulic cylinder 96
．． 96 are connected in parallel and controlled by the same directional control valve 242.
1. When moving the carrier-side lower connecting member 96 in the vertical direction, it is possible to prevent operational errors such as driving the wrong hydraulic cylinder.

Furthermore, limit switches 270 and 271 that are turned on when the column device 51 is located at the front or rear part of the subframe 47 are provided at the front and rear ends of the subframe 47, and control switching of the directional control valve 242. The operation switch 260 is connected to the limit switch 270.2.
71 in series, even if the operator accidentally operates the operation switch 260 while moving the container l horizontally relative to the carrier 45, the front part of the container l Or the rear height can be kept unchanged. Therefore, container 1
It is possible to prevent the container l from tipping, and to prevent the loaded items in the container l from falling over.

<Effects of the Invention> As is clear from the above, the container handling vehicle of the present invention is capable of loading and unloading containers while maintaining a horizontal posture, and the container handling vehicle of the present invention is capable of loading and unloading containers while maintaining a horizontal posture. The cargo handling arm and the container can be automatically connected or disconnected.

Further, the container cargo handling vehicle of the present invention includes a limit switch that operates when the column device is located at the rear portion of the subframe, and an operation switch that enables the operation of the drive means only when the limit switch is activated. This prevents the container from tipping even if the operator makes an erroneous operation during horizontal movement, and prevents the loaded items in the container from tipping over.

[Brief explanation of the drawing]

Fig. 1 is a diagram showing a state in which a container is loaded into a container handling vehicle according to an embodiment of the present invention, Fig. 2 is a diagram showing the container handling vehicle as seen diagonally from the rear, and Fig. 3 is a diagram showing the container loaded into a container handling vehicle according to an embodiment of the present invention. Diagram showing the view from diagonally from the front, No. 4
5 and 6 are views showing the column device of the container cargo handling vehicle as seen from the side, rear, and front, respectively, and FIG. 7 is a diagram showing the hydraulic circuit of the container cargo handling vehicle,
FIGS. 8 and 9 are diagrams showing the electric circuit of the container handling vehicle, FIGS. 10(a) to 10(d) are diagrams explaining the operation of loading the container onto the container handling vehicle, and FIG. 11 is a diagram showing the electric circuit of the container handling vehicle. FIGS. 12(a) to 12(d) are diagrams illustrating a conventional container cargo handling vehicle viewed diagonally from the rear, and are diagrams illustrating the operation of loading containers onto the conventional container cargo handling vehicle. l... Container, 2... Container body, 3... Supporting member, 11... Container side upper connecting member, 16...
- Container side lower connecting member, 17... Engagement member, 21.40.58, 84.85... Chain, 23.
24, 25.2B, 42, 43, 54, 5657.82
．． 86... Sprocket, 45... Carrier, 46
...Chassis frame, 47...Subframe, 5
DESCRIPTION OF SYMBOLS 1... Column device, 59... Hydraulic motor, 61... Carrier side upper connection member, 63.95... Clevis, 65... Connection bin, 69
...Operating pin, 71.96...Hydraulic cylinder, 71
a, 95a... Piston rod, 91... Carrier side lower connecting member, 203... Rotating piece, 204... Torsion spring, 205
... Lock piece, 209 ... Connection plate, 242.243
... Direction control valve, 242a, 242b, 243a, 243b = solenoid, 249.250, 251, 252, 253, 251
...Hydraulic piping, 260...Operation switch, 270.271...Limit switch. 300...Battery.

Claims (1)

[Claims] (1) A column device that is provided so as to be movable back and forth on a subframe mounted on the chassis frame, and a carrier side upper connection that is provided on the column device so that it can be moved up and down, and that is removably connected to the container side upper connection member. a carrier-side lower connecting member that is vertically movably provided on the column device and removably connected to the container-side lower connecting member, and a drive for vertically moving the carrier-side upper connecting member and the carrier-side lower connecting member. A container cargo handling vehicle equipped with a limit switch that operates when the column device is located at a rear portion on the subframe, and an operation switch that enables the operation of the drive means only when the limit switch is activated. A container handling vehicle that is characterized by: