JP5258464B2 - Container handling vehicle - Google Patents

Description

  The present invention relates to a container handling vehicle having a function of detaching a container from a chassis.

  Conventionally, various container handling vehicles comprising a container and a carrier for carrying the container have been developed. A carrier of this type of container handling vehicle is provided with a cargo handling device for detaching a container on a chassis. Such a cargo handling apparatus includes a cargo handling arm that is provided so as to be pivotable in the front-rear direction, and a hook arm that is provided on the cargo handling arm so as to be pivotable in the front-rear direction, and is provided with a hook at the tip. reference).

Conventionally, the loading capacity of a container loaded on the carrier is determined based on the loading capacity of the carrier. For example, a carrier having a maximum loading capacity of 2 tons is loaded with a dedicated 2 ton container. A carrier with a maximum loading capacity of 4 tons was loaded with a dedicated 4 ton container.
JP-A-11-59257

  However, the conventional container handling vehicle has a problem that the carrier and the container must always be arranged for each loading capacity. Also, for example, when it is desired to collect and transport a 2-ton container, if there is no 2-ton carrier at hand, it cannot be used even if it has a 4-ton carrier. Therefore, it is necessary to wait for the carrier for 2 tons to come back, and this causes a disadvantage that the operating rate of the carrier is greatly reduced.

  Furthermore, there is a case where a container of another manufacturer is loaded on a carrier of a certain manufacturer. However, when the container is manufactured according to a manufacturer's original specification, there is a problem that the container cannot be loaded on the carrier well.

  Therefore, the present invention has been made in view of such a point, and an object of the present invention is to enable a plurality of types of containers having different shapes to be transshipped with the same carrier.

  A container handling vehicle according to the present invention is a container handling vehicle provided with a cargo handling device capable of detaching a plurality of types of containers having different shapes on a chassis, and the cargo handling device is provided so as to be rotatable in the front-rear direction. An arm, a hook arm provided on the cargo handling arm so as to be pivotable in the front-rear direction, and a hook provided at a tip of the hook arm, and the cargo handling according to the type of the container when the container is attached or detached. A control unit is provided that can control the rotational movement of each arm so that the angle formed by the arm and the hook arm is changed.

  According to this, while changing the angle formed between the cargo handling arm and the hook arm by the control unit, each of these arms is appropriately rotated in the front-rear direction so that the container is detached. As described above, the height position of the hook and the position in the front-rear direction can be changed by controlling the turning operation by the control unit in order to change the angle formed by both arms. Accordingly, for example, it is possible to transpose a plurality of types of containers having different lengths in the front-rear direction or different heights of engaging portions provided in the containers to be engaged with the hooks. That is, it is possible to flexibly deal with a plurality of types of containers having different shapes and a plurality of types of containers having different specifications for each manufacturer. As a result, the operating rate of the carrier is greatly improved.

  Further, when the container is attached or detached, the turning operation of each arm is controlled so as to change the angle formed by each arm, so that the attaching / detaching operation can be performed in a stable state according to the type of the container. As a result, the angle formed by each arm becomes an inappropriate angle, and a series of operations can be performed safely without the container falling off the hook during the rotation of the cargo handling arm.

  Furthermore, in order to cope with transshipment of a plurality of types of containers, for example, compared to a case where a driving device that changes the height position of the hook and a driving device that changes the front and rear position of the hook are provided separately, There is also an advantage that the configuration can be simplified.

Further, the plural kinds of containers has a first container having a first engagement portion engaged with the hook, a second engagement portion that is disposed at the upper position than the engaging portion of the first container It consists of a second container, wherein, when loading the second container, together with the hook is arranged at a height position between the second engaging portion and the first engagement portion, the first when loading a container, wherein the hook arm is rotated backward, the hook is controllably configured to be disposed at a lower position than the first engagement portion.

  According to this, when it is controlled by the control unit to load the first container, when the cargo handling arm is rotated rearward, the hook is disposed at a position below the engaging portion of the first container. Thereby, the first container can be loaded. On the other hand, when the second container is loaded, the control unit controls the hook so as to be arranged at a height position between the first engaging part and the second engaging part. In this case, since the hook cannot be engaged with the first engaging portion of the first container, a situation where the first container is erroneously loaded when trying to load the second container is avoided in advance. be able to.

  Furthermore, in order to rotate the cargo handling arm and the hook arm, a hydraulic circuit unit having a plurality of relief valves is provided, and the control unit is operated in accordance with the type of container to be loaded. It is also possible to make it possible to change the relief pressure of the hydraulic circuit section by making any one of the relief valves corresponding to the operation mode effective when the pressure is changed.

  According to this, since the relief pressure of the hydraulic circuit unit is set by the control unit according to the type of container to be loaded, an appropriate force corresponding to the type of container is applied to the container from each arm, and the loading and Unloading work can be done safely. Specifically, if the size of the relief pressure is set according to the size of the shape, it is possible to prevent a container with a small shape in an overloaded state from being forcibly loaded. Therefore, it is possible to prevent a load from being applied to a container having a small shape, and it is possible to prevent the container from being damaged during loading and unloading operations.

  As described above, since a plurality of types of containers having different shapes can be transshipped with the same carrier, the operating rate of the carrier can be improved.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a side view showing a container handling vehicle according to the present embodiment. A cab 2 is provided in front of the container handling vehicle 1 capable of traveling, and a chassis 3 is provided in the rear. On the chassis 3, a cargo handling device 4, an erroneous loading prevention device 5 and a lock device 6 are provided. The cargo handling device 4 is for loading and unloading the container C on the chassis 3. The erroneous stacking prevention device 5 is intended to prevent the containers C of different types (having different shapes depending on the loading capacity and specifications) from being loaded on the chassis 3 in advance. Further, the lock device 6 is a device for fixing the loaded container C on the chassis 3.

  As shown in FIGS. 2 and 3, the cargo handling device 4 includes a plane-shaped substantially rectangular cargo handling frame 10 fixed on the chassis 3, and a pair of vehicles disposed on the chassis 3 with a predetermined interval in the width direction. A dump frame 12 provided rotatably on the shaft 11, a cargo handling arm 14 provided rotatably on the front and rear directions via a support shaft 13 installed on the dump frame 12, and a hook 15 on the tip portion. The arm 17 includes a hook arm 16 rotatably provided at the tip of the cargo handling arm 14, and a drive unit 18 for driving the arm 17. The cargo handling arm 14 is provided with a substantially linear and cylindrical base member 14a provided on the support shaft 13 and a hook arm 16 provided at the tip, and is slidably inserted into the base member 14a in the front-rear direction. It consists of a substantially L-shaped movable member 14b.

The drive unit 18 includes a pair of first hydraulic cylinders 30 for rotating the cargo handling arm 14, a second hydraulic cylinder 31 for rotating the hook arm 16, and a movable member 14b of the cargo handling arm 14 as a base member 14a. The third hydraulic cylinder 32 for sliding in the front-rear direction and the hydraulic device 33 (see FIG. 4) for supplying and discharging the hydraulic oil to and from the third hydraulic cylinder 32 are provided. As shown in FIG. 2, the base end portion of each first hydraulic cylinder 30 is pivotally mounted between the flanges 35, 35 disposed opposite to the construction plate 34 of the cargo handling frame 10. Further, the tip of the rod 36 of each first hydraulic cylinder 30 is pivotally attached to the rear side surface of the base member 14a. The base end portion of the second hydraulic cylinder 31 is pivotally mounted between a pair of flanges 37 and 37 protruding from the front surface of the movable member 14b. Further, the tip of the rod 38 is pivotally attached to a pair of flanges 39, 39 protruding from the front surface of the hook arm 16. Further, the base end portion of the third hydraulic cylinder 32 is pivotally mounted in the base member 14a, and the tip end of the rod 40 is fixed in the movable member 14b.

  As shown in FIG. 4, the hydraulic apparatus 33 according to the present embodiment includes a unit-type first pump connected to two types of hydraulic pumps 50 and 51 having different discharge capacities and a first hydraulic pump 50 having a large discharge amount. The hydraulic circuit unit 52 includes a unit-shaped second hydraulic circuit unit 53 that is connected to the second hydraulic pump 51 with a small discharge amount. The first hydraulic circuit section 52 includes the first hydraulic cylinder 30 and the third hydraulic cylinder 32, and a three-position electromagnetic switching valve (first switching valve) for appropriately supplying and discharging hydraulic oil to and from each of the hydraulic cylinders 30 and 32. 54, a second switching valve 55, and a third switching valve 56).

  The first switching valve 54 is connected to the first hydraulic pump 50 via the flow path k. A main relief valve 63 that protects the hydraulic circuit is connected to the flow path k. A second switching valve 55 is connected to the downstream side of the first switching valve 54. A pilot check valve 61 is connected to the downstream side of the second switching valve 55 via the first supply / discharge passages a and b. A port relief valve 64 for protecting the hydraulic circuit is connected to the first supply / discharge passages a and b. The relief pressure of the port relief valve 64 is set to be smaller than that of the main relief valve 63. The downstream side of the pilot check valve 61 is connected to the counter balance valve 65 via the second supply / discharge passages c and d. Third supply / discharge paths i, j provided on the downstream side of the first switching valve 54 are connected to the second supply / discharge paths c, d. The downstream side of the counter balance valve 65 is connected to the pair of first hydraulic cylinders 30 and 30 via the fourth supply / discharge passages e, f, g, and h. The second hydraulic circuit unit 53 supplies the second hydraulic circuit unit 53 in addition to the second hydraulic cylinder 31 and the three-position electromagnetic switching valve (fourth switching valve 57) for supplying and discharging hydraulic oil to and from the second hydraulic cylinder 31. A three-position electromagnetic switching valve (fifth switching valve 58) for supplying the supplied hydraulic oil to the first hydraulic circuit section 52 is provided.

The operation of the hydraulic device 33 is performed by the control unit (not shown) in the shape of the container C to be loaded (for example, the container 2 for 2 tons C1 (first container) and the container 4 for 4 tons C2 (second container)). Accordingly, mode control is performed as follows. Note that the operator's cab 2 is provided with a switch (not shown) for determining in which operation mode to operate.

  When loading a 4-ton container C4, the flow path k, the first switching valve 54, the third supply / discharge path i (j), the second supply / discharge path c (d), the counter balance valve are connected from the first hydraulic pump 50. The hydraulic oil is supplied to the first hydraulic cylinder 30 via 65 and the fourth supply / discharge paths e, g (f, h), while the hydraulic oil in each hydraulic cylinder 30 is supplied to the fourth supply / discharge paths f, h. (E, g), the counter balance valve 65, the second supply / discharge path d (c), the third supply / discharge path j (i), the first switching valve 54 and the filter 59 are discharged into the tank 60. In addition, the hook arm 16 is configured not to be operated when the 4-ton container C4 is loaded. As a result, the hydraulic oil supplied to the second hydraulic circuit unit 53 can be distributed to the first hydraulic circuit unit 52. Therefore, the hydraulic fluid supplied from the second hydraulic pump 51 to the second hydraulic circuit portion 53 is the hydraulic fluid supplied from the first hydraulic pump 50 to the first hydraulic circuit portion 52 via the fifth switching valve 58. I try to merge. Thereby, since the extension operation | movement of the rod 36 of the 1st hydraulic cylinder 30 is accelerated, the cargo handling arm 14 will rotate back rapidly. As a result, work efficiency is improved. When the rod 36 of the first hydraulic cylinder 30 is contracted, the first switching valve 54 is switched. When loading the 4-ton container C4, the main relief valve 63 connected to the flow path k is effective.

  On the other hand, when loading the container 2 for 2 tons, the flow path k, the 1st switching valve 54, the 2nd switching valve 55, the 1st supply / exhaust path a (b) from the 1st hydraulic pump 50, a pilot check The hydraulic oil is supplied to the first hydraulic cylinder 30 through the valve 61, the second supply / discharge passage c (d), the counter balance valve 65, and the fourth supply / discharge passages e, g (f, h). On the other hand, the hydraulic oil in the hydraulic cylinder 30 is supplied to the fourth supply / discharge passages f, h (e, g), the counter balance valve 65, the second supply / discharge passage d (c), the pilot check valve 61, the first supply passage. The gas is discharged into the tank 60 through the discharge path b (a), the second switching valve 55 and the filter 59. When the container 2 for 2 tons is loaded, the port relief valve 64 connected to the first supply / discharge passages a and b in addition to the main relief valve 63 is effective. Here, when a large load in the extending or contracting direction is applied to the rod 36 of the first hydraulic cylinder 30, the relief pressure of the port relief valve 64 is lower than that of the main relief valve 63. The part is returned to the tank 60 via the port relief valve 64. That is, the maximum supply pressure of the hydraulic oil supplied to the first hydraulic cylinder 30 is reduced as compared with the case of the 4-ton container C4.

  Thus, in the present embodiment, it is possible to operate in different operation modes depending on the shape of the container C to be loaded. Therefore, it is possible to satisfactorily avoid a situation where the container C is damaged due to an excessive or excessive force acting when each container C is attached or detached. That is, by applying an appropriate force according to the shape of the container C, the loading and unloading operations can be performed safely.

  When the movable member 14b of the cargo handling arm 14 is slid in the front-rear direction, the hydraulic oil is supplied from the first hydraulic pump 50 to the third hydraulic cylinder 32 via the third switching valve 56, while the hydraulic cylinder The hydraulic oil in 32 is discharged into the tank 60 through the third switching valve 56 and the filter 59.

  Further, when the hook arm 16 is rotated, the hydraulic oil is supplied from the second hydraulic pump 51 to the second hydraulic cylinder 31 via the fourth switching valve 57. Further, the hydraulic oil in the second hydraulic cylinder 31 is discharged into the tank 60 through the fourth switching valve 57 and the filter 62. As a result, the rod 38 of the second hydraulic cylinder 31 extends (shrinks), and the hook arm 16 rotates rearward (forward).

  As described above, since the two hydraulic circuit portions 52 and 53 having the hydraulic pumps 50 and 51 are provided, the hydraulic system for rotating the cargo handling arm 14 and the hook arm 16 are rotated. There is no interference with the hydraulic system. Thereby, it is possible to simultaneously rotate the hook arm 16 while rotating the cargo handling arm 14. Therefore, compared with the case where each operation is performed separately, there is an advantage that the working efficiency can be greatly improved.

The hydraulic piping in the hydraulic device 33 is accommodated as shown in FIGS. That is, a long flat storage box 72 is disposed above the base of the movable member 14 b of the cargo handling arm 14. The storage box 72 includes upper and lower covers 70 and 71. As described above, the base side of the movable member 14b is slidably attached to the base member 14a. However, the base member 14a and the storage box 72 do not come into contact with each other when the cargo handling arm 14 contracts. There is a space in which the base member 14a can enter between the cover 71 and the upper surface of the base of the movable member 14b, and the front end of the storage box 72 is fixed to the vertical portion of the movable member 14b. Further, when the movable member 14b is slid forward most with respect to the base member 14a, the rear end portion of the storage box 72 and the front end portion of the base member 14a are substantially aligned. In the storage box 72, a substantially U-shaped fixed pipe 73 whose one end is connected to the second hydraulic cylinder 31 side and a movable hose 74 whose one end is connected to the other end are stored. Yes. The fixed pipe 73 is made of a steel pipe and is fixed to the lower cover 71. The movable hose 74 are accommodated as the front side has a convex shape, so that its other end along the side surface of the base member 14a through a long hole 72a which is opened in the longitudinal direction on one side of the lower cover 71 It is arranged in. Also, the contact plate 75 is provided along the side surface of the base member 14a, and the movable hose 74 is brought into contact with the inner surface of the contact plate 75 to restrict movement in the width direction. Note that one end of the movable hose 74 is accommodated in the storage box 72 while forming a convex shape regardless of the sliding movement of the movable member 14b.

Further, both side surfaces of the upper cover 70 in the width direction are formed by inclined surfaces 70a that expand toward the lower side as shown in FIG. The base member 14 a is provided with a guide 76 that is held in a sliding state on the inclined surface 70 a through an attachment plate 77. The attachment plate 77 is attached to a pair of brackets 79, 79 provided on the left and right side surfaces of the base member 14a. In addition, a pad 78 is provided on the lower surface of the rear end portion of the lower cover 71 to hold the upper surface of the base member 14a in a sliding state. By holding the upper cover 70 by the guide 76 and holding the lower cover 71 by the pad 78, the integrity of the upper and lower covers 70, 71 is maintained well, and the upper cover 70 is moved upward by the floating of the movable hose 74. Is blocked. Further, the rear end portion of the lower cover 71 is prevented from moving downward due to the presence of the pad 78.

  According to this, when the movable member 14b of the cargo handling arm 14 is slid back and contracted with respect to the base member 14a, one end portion side of the movable hose 74 moves into the storage box 72 as shown in FIG. Will be stored. On the other hand, when the movable member 14b is slid forward with respect to the base member 14a and extended, the movable hose 74 is satisfactorily exposed from the inside of the storage box 72 to the outside through the long hole 72a as shown in FIG. It will be pulled out. By storing the hydraulic piping in the storage box 72 in this way, the movable hose 74 and the like will not interfere with the operations of the cargo handling arm 14 and the hook arm 16, and the movable hose 74 may be damaged. Absent. Further, the hydraulic piping is protected from the scattered matter from the container C. Furthermore, by providing a storage box 72 for hydraulic piping outside the cargo handling arm 14, the hydraulic piping can be replaced and inspected more easily than when hydraulic piping is stored in the base member 14a of the cargo handling arm 14. Excellent maintainability. Further, the storage box 72 can store the hydraulic piping with a good appearance. In addition, since the hydraulic pipe storage mechanism can be configured simply and in a space-saving manner, it has a practical advantage that it can be manufactured inexpensively and easily.

The rotational position of the cargo handling arm 14 is detected by the following detection means. That is, such detection means includes a detection plate 80 provided on one side of the base member 14a of the handling arm 14 as shown in FIG. 2, is provided to face on the detected known plate 80 to an inner surface of the dump frame 12 The first and second sensors 81 and 82 are included. Both detection states A1 in which both sensors 81 and 82 detect the detection plate 80 as shown in FIG. 7A, and a first detection state in which only the first sensor 81 on the front side detects as shown in FIG. 7B. A 2, an undetected state A 3 where both the sensors 81, 82 are not detected as shown in FIG. 5C, and a second detected state A 4 where only the second sensor 82 on the rear side is detected as shown in FIG. as the four detection pattern is obtained, the detection plate 80 is formed in a predetermined shape, the second sensor 82 is arranged on the rear side obliquely lower position of the first sensor 81. That is, as shown in FIG. 8, the detection path 83 by the first sensor 81 is formed on the outer peripheral portion of the detection plate 80, and is formed at the first arc-shaped portion 83a detected by the first sensor 81 and at the tip thereof. And a cutting part 83b as an undetected part. Further, the detection path 84 by the second sensor 82 is formed on the inner peripheral side of the detection plate 80 and is detected by the second sensor 82, and a notch formed as an undetected portion. 84b and an inward convex portion 84c provided at one end portion of the detection plate 80 and detected.

  When the cargo handling arm 14 is rotated about 70 ° to the rear side from the front limit rotation position where the cargo handling arm 14 has rotated most forward, only the first sensor 81 is detected from the detection state A1 of both the first and second sensors 81 and 82. The process proceeds to the first detection state A2 in which 80 first arcuate portions 83a are detected. Thereafter, at a point where the cargo handling arm 14 further rotates about 35 ° rearward, both the sensors 81 and 82 shift to an undetected state A3 in which the detection plate 80 is not detected. From there, it is set so that only the second sensor 82 shifts to the second detection state A4 in which the inward convex portion 84c of the detection plate 80 is detected at a point where the cargo handling arm 14 is rotated about 25 ° rearward. Yes. In the second detection state A4, the cargo handling arm 14 is disposed at the rear limit rotation position that is most rearwardly rotated.

  That is, by combining the pair of sensors 81 and 82 and the detection plate 80 having a predetermined shape in this way, the four patterns of rotational positions of the rotating cargo handling arm 14 can be detected. Accordingly, since a large number of rotational positions can be detected with a small number of sensors, the configuration of the apparatus itself can be simplified, and there is an advantage that it can be manufactured at low cost.

  As shown in FIG. 9, the pivot position of the hook arm 16 is also configured so that four detection patterns can be detected by detection means substantially similar to the detection means. That is, a detection plate 84 similar to the detection plate 80 provided on the cargo handling arm 14 is provided on one side surface of the base end portion of the hook arm 16, and a pair of third and fourth sensors 85, 86 that detect this detection plate 84. Are different in that they are arranged on the same vertical line, but there is no substantial difference. More specifically, in the hook upright state (front limit rotation position) in which the hook arm 16 is rotated most forward, both the third and fourth sensors 85 and 86 are in the detection state B1. From that point, until the point where the hook arm 16 is further rotated about 28 ° rearward, only the third sensor 85 is in the first detection state B2 in which the detection plate 84 is detected. From that point to the point where the hook arm 16 is further rotated about 17 ° rearward, both the sensors 85 and 86 are in the undetected state B3 in which the detection plate 84 is not detected. Then, at a point immediately after the hook arm 16 is rotated about 28 ° rearward, only the fourth sensor 86 enters the second detection state B4 in which the detection plate 84 is detected. At this point, the hook arm 16 is in the fully tilted state (rear limit rotation position) in which the hook arm 16 is rotated most rearward. Here, the boundary between the first detection state B2 and the non-detection state B3 is defined as a hook tilting middle position α.

  The above-described rotation of the cargo handling arm 14 is performed by manually operating a loading / unloading button of a remote controller (not shown) provided in the driver's seat 2. That is, when the loading button of the remote control is continuously pressed, the cargo handling arm 14 is rotated forward. Further, when the loading / unloading button of the remote controller is continuously pressed, the cargo handling arm 14 is rotated backward. Then, as the detection state of the first sensor 81 and the second sensor 82 changes during the rotation of the cargo handling arm 14, the rotation of the hook arm 16 is automatically controlled. The rotation position of the hook arm 16 that is automatically controlled is determined by the third sensor 85 and the fourth sensor 86 as described above.

  The erroneous loading prevention device 5 prevents the 4-ton container C4 from being loaded in the operation mode of the 2-ton container C2, and is provided on one side member 10a of the cargo handling frame 10. Yes. As shown in FIG. 10, the erroneous stacking prevention device 5 includes a lever 90 that is pressed by the bottom surface of the loaded 4-ton container C4 and pivots backward, and a proximity switch that detects the pivoting operation of the lever 90. It is comprised with the sensor 91 which consists of. The lever 90 is fixed to the side member 10a by a box-shaped attachment member 93 through which a support shaft 92 is rotatably inserted. A base end side of a pair of opposed pieces 94 and 95 is attached to both ends of the support shaft 92, and a roller 96 is provided between the front end portions so as to be rotatable. Further, a reinforcing plate-like body 97 is installed between the facing pieces 94 and 95 so as to be positioned between the roller 96 and the mounting member 93. A detection piece 98 is provided on one end surface located outside the support shaft 92. As shown in FIG. 5A, the lever 90 is extended outward at the base end portion of the outer facing piece 95 so that the tip of the lever 90 is inclined upward (usually when the container is not loaded). A coil spring 101 is attached between the tongue piece 99 and an L-shaped angle 100 provided on the side member 10 a of the cargo handling frame 10. In this case, another elastic body may be used instead of the coil spring 101. The lever 90 is constituted by each member as described above.

  On the other hand, the sensor 91 is attached to an attachment angle 102 provided on the side member 10a so as to face the detection piece 98 of the lever 90 normally (when the container is not loaded). When the lever 90 rotates, the sensor 91 detects this, and a detection signal is transmitted to the control unit.

  In addition, the rotational position of the cargo handling arm 14 when each container C being loaded presses the lever 90 is set in advance. When the cargo handling arm 14 is rotated to the set predetermined position during loading in the 2-ton operation mode, if the sensor 91 detects the rotation of the lever 90 as shown in FIG. 11, the container C being loaded is The control unit determines that the load is for 4 tons, and the control unit stops the rotation operation of the cargo handling arm 14 to stop the loading operation. Thereby, the situation where the container 4 for 4 tons is loaded accidentally can be avoided beforehand. As a result, the loading operation can be appropriately performed according to the shape of the container C. In addition, the operation mode is set so that the angle formed by the cargo handling arm 14 and the hook arm 16 during rotation according to the shape of the container C is appropriate, the shape does not correspond to the set operation mode. If the container C is erroneously loaded, this angle becomes inappropriate and the container C may fall and roll over or collide with the cargo handling vehicle 1. Can be prevented satisfactorily. As a result, a series of loading operations can be performed safely.

  In addition, when the cargo handling arm 14 stops in this way, a presentation means that visually presents with a lamp, a display, etc. provided in the cab 2 and is presented auditorily with a voice, a buzzer sound, or the like is provided. I have. As a result, the operator or the like can recognize the situation of erroneous loading of the container C.

  Further, after the cargo handling arm 14 is stopped due to erroneous loading as described above, the operator performs a remote control operation so that the loaded container C is lowered to the ground. That is, after the cargo handling arm 14 is rotated rearward to ground the container C, the hook arm 16 is rotated rearward (downward) to engage the hook 15 and the locking portion 161 of the 4-ton container C4. Release the combined state. Further, the operation mode is changed to 4 tons, or the loading container C is changed to the 2-ton container C2, and the loading operation is performed.

  In some cases, the 2-ton container C2 may be erroneously loaded in the 4-ton operation mode. In this case, the erroneous loading prevention means 5 is used instead of the erroneous loading prevention device 5 to perform erroneous loading. It is preventing. This will be described later.

  In addition, a pair of left and right guide rollers 110 are rotatably provided on the chassis 3 at a rear position of the erroneous stacking prevention device 5. The guide roller 110 rotates while holding the bottom surface when the container C is detached, so that the removal operation can be performed smoothly.

  The locking device 6 is provided on each side frame 12 a of the dump frame 12. As shown in FIG. 12, the locking device 6 includes a first lock portion 120 for locking the 2-ton container C2, and a second lock portion disposed at the front position for locking the 4-ton container C4. 121. The first lock portion 120 has a substantially U-shaped fixing member 122 in a plane, and is fixed on the side frame 12a so that the back surface portion 123 is located in the front. A first lock body 126 having a substantially L-shaped side surface is rotatably provided on the mounting shaft 125 that is installed on the side surface portion 124 of the fixing member 122. As shown in FIG. 13A, the first lock main body 126 includes a pair of opposed side plates 127, a back plate 128 provided on the back side, and a cylinder provided between the side plates 127 so as to allow the attachment shaft 125 to be inserted therethrough. And 129. Further, a bent portion 130 is formed on the side of the upper portion of the first lock body 126, and a locking hole 131 is formed in a portion of the back plate 128 that constitutes the bent portion 130. When the two-ton container C2 is loaded, as shown in the figure, a substantially L-shaped locking portion 160 projecting at a predetermined position on the bottom surface is locked in the locking hole 131, and the container C2 is fixed on the chassis 3.

  The second lock portion 121 also has a substantially U-shaped fixing member 132 in a plane, and is fixed on the side frame 12a so that the back surface portion 133 is located rearward. On the attachment shaft 135 installed on the side surface portion 134 of the fixing member 132, a second lock main body 136 having a substantially L-shaped side surface is rotatably provided. As shown in FIG. 13B, the upper side of the second lock main body 136 has a front surface and a rear surface opened to form a locking hole 137. When the 4-ton container C4 is loaded, as shown in the figure, a substantially L-shaped locking portion 161 projecting at a predetermined position on the bottom surface is locked in the locking hole 137, and the container C4 is fixed on the chassis 3.

  One end of each of the mounting shafts 125, 135 so that when one of the lock main bodies 126, 136 of the first lock section 120 or the second lock section 121 stands, the other lock main bodies 136, 126 tilt. Are connected by a link mechanism 138. The link mechanism 138 includes swing rods 139 and 140 fixed to the mounting shafts 125 and 135, and a connecting rod 141 rotatably connected between the swing rods 139 and 140. . The connecting rod 141 is connected between the two swing rods 139 and 140 so that the parallel state of the two swing rods 139 and 140 is always maintained.

  According to the shape of the container C to be loaded, the lock main bodies 126 and 136 are manually rotated by an operator so that any one of the lock main bodies 126 and 136 is in an upright state at the start of loading. In order to maintain this standing state, it locks to any one of the through holes 143, 144, 145, 146 formed in the side surfaces 124, 134 of the fixing members 122, 132 and the side plates 127, 142 of the lock bodies 126, 136. The pin 147 is inserted from the side. In addition, a sensor 148 including a proximity sensor is attached to the back surface portion 123 of the fixing member 122 of the first lock unit 120. When the standing state or the tilted state of the first lock body 120 is detected, It is configured to send a signal.

  In addition, when the operation mode corresponding to the lock body 126 or 136 in the standing state is not selected, the operator is made to recognize that by the above-described presentation means.

  In addition, the container handling vehicle 1 according to the present embodiment includes a dump lock device 200 that integrally fixes and rotates the handling arm 14 and the dump frame 12 (see FIGS. 2 and 3). . Thereby, the safe tilt-up and tilt-down operation of the container C becomes possible, and the load in the loaded container C can be discharged. Since such a dump lock device 200 is conventionally known, only a brief description will be given here.

That is, the dump locking device 200 is provided with a lock pin 201 to the distal end portion of the dump frame 12 when both this provided rotatably detachably locking hook 202 on both side surfaces of the base member 14a of the handling arm 14 It is a thing. Using the sliding movement of the movable member 14b with respect to the base member 14a, the locking hook 202 is rotated back and forth by an operating rod (not shown) to be engaged with and disengaged from the lock pin 201. Thereby, it is comprised so that the cargo handling arm 14 and the dump frame 12 can be fixed integrally, or this can be cancelled | released.

  In addition, on both outer side surfaces of the substantially central portion of the dump frame 12, a jump prevention device is provided for each container C to prevent the container C loaded on the chassis 3 from jumping up due to vibrations during traveling. However, here, only the splash prevention device 210 for the 4-ton container C4 will be described (see FIGS. 1 to 3). The apparatus 210 is also conventionally known, and includes a support shaft 211 protruding from the outer surface of the dump frame 12, a plate-like hook material 212 that is rotatably provided on the support shaft 211, and the hook material 212. It is made of a spring material (not shown) that urges the tip of the spring to face downward. A pin (not shown) provided on the container C to be loaded is engaged with the hook material 212 to prevent jumping.

  The present embodiment is configured as described above. Next, a case where containers having different shapes such as containers for 2 tons and 4 tons are loaded using such container handling vehicles will be described. Any container C is performed in a state where the container handling vehicle 1 is stopped at a position in front of the container C as shown in FIG.

The case where the container 2 for 2 tons is loaded on the chassis 3 from the state of the operation mode for 4 tons will be described (Note that the hook arm 16 is movable in the operation mode for 4 tons as described later. It is substantially in line with the member 14b).

  First, the operator manually rotates the first lock body 126 of the lock device 6 so that the first lock body 126 is in an upright state. As a result, the second lock body 136 is automatically tilted via the link mechanism 138. And in order to maintain this standing state reliably, the lock pin 147 is inserted in the through-holes 143 and 145 formed in the fixing member 122 and the side plate 127.

  On the other hand, the operator selects and turns on the operation mode switch for 2 tons in the cab 2. At that time, for example, if an operator accidentally raises the second lock body 136 corresponding to the container 4 for four tons of the lock device 6, the sensor 148 of the lock device 6 does not detect the first lock body 126. A signal to that effect is sent to the control unit. Based on this, the rotation operation of the cargo handling arm 14 by the remote controller is prohibited, and the operator is made to recognize that the operation is wrong by the presentation means, and the correction is urged.

  On the other hand, if there is no inconsistency in the selection of the operation mode and the setting of the lock device 6 or this is eliminated, the control unit next determines the rotation position of the cargo handling arm 14 and the rotation position of the hook arm 16. It is determined whether or not the relationship is appropriate. If this is not appropriate, the control unit temporarily prohibits the turning operation of the cargo handling arm 14 by the remote controller. And according to the rotation position of the cargo handling arm 14, it controls so that the rotation position of the hook arm 16 may become an appropriate position. For example, when the hook arm 16 is in the front limit position and the movable member 14b of the cargo handling arm 14 is in the front limit position with respect to the base member 14a (hereinafter referred to as “arm landing state”), the hook arm 16 is The second hydraulic cylinder 31 is rotated to the hook fully collapsed state. In this arm landing state, if it is determined that the hook arm 16 is fully hooked, the cargo handling arm 14 can be rotated by the remote controller.

  Next, when the loading / unloading button of the remote control is continuously pressed from the state where the hooks are fully lowered and the arm is landed, the movable member 14b of the cargo handling arm 14 is slid rearward, and then the cargo handling arm 14 is rotated to the rear limit position. The Further, the hook arm 16 is rotated in accordance with the operation of the cargo handling arm 14. The details of the pivoting operation of the hook arm 16 accompanying the operation of the cargo handling arm 14 up to the rear limit position are the same as those in the case of loading and unloading the loaded 2-ton container C2 on the ground, which will be omitted here.

  When the cargo handling arm 14 is pivoted to the rear limit pivot position, the cargo handling arm 14 stops. Thereafter, when the loading / unloading button of the remote control is continuously pushed, the hook arm 16 is rotated backward from the hook upright state B1 by the second hydraulic cylinder 31 by the amount of pushing of the loading / unloading button (see FIG. 14A). . In this case, the hook arm 16 is set so that it can be rotated by a remote controller. In this manner, preparation for loading the container C2 for 2 tons can be performed.

  Next, press the loading button on the remote control to start the actual loading operation. As shown in FIG. 14 (b), when the loading button of the remote controller is continuously pressed, the hook arm 16 is rotated forward (upward) by the second hydraulic cylinder 31 by the amount of the pressing, and the hook 15 is moved to the container C2. Is engaged with an engaging portion 162 (first engaging portion) provided on the front surface of the. Then, as shown in FIG. 9, when the third sensor 85 and the fourth sensor 86 are in the detection state, the hook arm 16 stops in a substantially straight line with the tip end of the cargo handling arm 14. Further, when the loading button of the remote controller is continuously pressed, the cargo handling arm 14 is rotated forward by the amount pushed as shown in FIG. When the cargo handling arm 14 transitions from the undetected state A3 to the first detected state A2, the control unit maintains a good engagement state between the hook 15 and the engagement portion 162 of the container C2 to ensure stability. Further, as shown in FIG. 9B, the hook arm 16 is rotated rearward (downward) by the second hydraulic cylinder 31, and the third sensor 85 and the fourth sensor 86 are not detected as shown in FIG. Stop at the point. At this time, since the arms 14 and 16 are driven by the two hydraulic pumps 50 and 51, the cargo handling arm 14 and the hook arm 16 can be rotated at the same time. Work efficiency can be improved.

  Here, as shown in FIG. 15B, when the cargo handling arm 14 is rotated forward, the detection state of the first sensor 81 and the second sensor 82 is the non-detection state A3 or the first detection state A2. In addition, when the erroneous stacking prevention device 5 detects the container C, it is determined that the container C is a 4-ton container C4. That is, as shown in FIG. 11, the rotation lever 90 of the erroneous stacking prevention device 5 is rotated by receiving a pressing force from the bottom surface on the front side of the container C4, and this is detected by the sensor 91 and the signal is sent to the control unit. It is done. The loading operation by the cargo handling arm 14 is stopped based on the signal. In this case, even if the loading button of the remote control is continuously pressed, the cargo handling arm 14 does not rotate forward, and only the cargo handling arm 14 can be rotated backward by pressing the loading / unloading button of the remote control. Therefore, the container C4 is grounded again by pressing the loading / unloading button on the remote control. That is, when the cargo handling arm 14 is rotated backward, the hook arm 16 is simultaneously rotated to the front limit rotation position, and the rear portion of the container C4 is grounded to the ground. Thereafter, the hook arm 16 is rotated rearward to release the engagement state between the hook 15 and the engaging portion 163 of the 4-ton container C4.

  On the other hand, when the loaded container is the 2-ton container C2, the erroneous stacking prevention device 5 while the detection state of the first sensor 81 and the second sensor 82 is the undetected state A3 or the first detection state A2. The container C is not detected at, and the cargo handling arm 14 rotates further forward by continuing to push the loading button of the remote control. While the detection state of the first and second sensors 81 and 82 is the detection state A1, the rotation by the cargo handling arm 14 is stopped regardless of whether or not the container C is detected by the erroneous stacking prevention device 5. Not to be. This is because the erroneous loading prevention device 5 detects the container C regardless of the type of the container C in the loaded state of the container C and a state close thereto. Further, when the container C is not loaded, the erroneous stacking prevention device 5 does not detect the container C regardless of the type of the container C.

  When the cargo handling arm 14 reaches the chassis 3 (front limit position), the cargo handling arm 14 stops rotating as shown in FIG. The container C2 is in a state where its front end is slightly lifted from the chassis 3. If the load button of the remote control is further pressed in this state, the hook arm 16 is rotated to the maximum rearward by the second hydraulic cylinder 31, the third sensor 85 becomes undetected and the fourth sensor 86 becomes detected. Then (see FIG. 9), the hook arm 16 stops at the rear limit rotation position. As a result, the 2-ton container C2 is landed on the chassis 3 as shown in FIG. After that, as shown in FIG. 17, upon receiving a command from the control unit, the movable member 14b of the cargo handling arm 14 is slid forward and stopped by the third hydraulic cylinder 32, and an arm landing state is established. At that time, the locking portion 160 of the container 2 for 2 tons is locked in the locking hole 131 provided in the first lock portion 120.

  Further, the 2-ton container C2 is securely and firmly fixed on the chassis 3 by the splash prevention device. Therefore, the container handling vehicle 1 can be run while the container C2 is stabilized.

  When the two-ton container C2 loaded as described above is loaded and unloaded on the ground, the operation may be performed so as to perform a substantially reverse operation as in loading as follows. By pressing the loading / unloading button of the remote controller, first, the movable member 14b of the cargo handling arm 14 is slid rearward by the third hydraulic cylinder 32 as shown in FIG. 16 (b). Thereby, the locked state by the first locking part 120 of the locking device 6 is released, and the fixed state by the jumping prevention device is released. Furthermore, by continuing to push the loading / unloading button of the remote control, the cargo handling arm 14 is rotated backward. At the same time, the third hydraulic cylinder 31 causes the third sensor 85 to be in the detection state, and the hook arm 16 is rotated forward to the hook tilting intermediate position α where the fourth sensor 86 is in the non-detection state (see FIG. 9). In this state, the cargo handling arm 14 is rotated rearward as shown in FIG. At this time, the rear end of the 2-ton container C2 is grounded.

From the time when the cargo handling arm 14 is rotated to the point where the first sensor 81 is in the detection state and the second sensor 82 is in the first detection state A2 in the non-detection state, as shown in FIG. Is rotated forward (upward) to the hook upright state which is substantially in line with the movable member 14b of the cargo handling arm 14. At this time, the hook arm 16 is rotated simultaneously with the rotation of the cargo handling arm 14. Thereby, the container 2 for 2 tons will move back, and interference with the rear-end part of the chassis 3 and the container 2 for 2 tons is prevented. Further, in this state, the cargo handling arm 14 continues to rotate, and the point at which the cargo handling arm 14 is rotated to the maximum rear side (rear limit rotation position), that is, the first sensor 81 is not detected and the second sensor 82 is detected. It stops when it becomes 2nd detection state A4 which becomes. Thereafter, by continuing to push the loading / unloading button of the remote control, the hook arm 16 rotates backward (downward) and stops at the point where only the fourth sensor 86 is detected and the hook is in a fully fallen state (see FIG. 9). ). Thereby, the loading / unloading operation of the container 2 for 2 tons onto the ground is completed. According to the series of arm operations as described above, the container C can be attached and detached without bringing the container C into contact with the vehicle and at a reasonable pulling angle.

  When the 4-ton container C4 is loaded on the chassis 3, the same operation as in the case of the 2-ton container C2 is basically performed. Therefore, the difference will be described here.

First, the hook arm 16 is fixed to the hook upright state substantially in line with the movable member 14b of the cargo handling arm 14, and the container C is completely attached and detached. That is, the hook arm 16 is not rotated in a series of detaching operations. Therefore, when the operation mode for 2 tons is switched to the operation mode for 4 tons and one of the third and fourth sensors 85 and 86 is not in the detection state, the rod of the second hydraulic cylinder 31 The control unit controls to contract 38 and rotate the hook arm 16 forward. In this way, by fixing the hook arm 16 without operating the second hydraulic cylinder 31 for rotating the hook when the container C4 is attached and detached, the hydraulic oil is supplied from the second hydraulic circuit unit 53 to the first hydraulic circuit unit 52. Therefore, the operating speed of the cargo handling arm 14 can be increased and the working efficiency can be improved.

  Further, in place of the above-described 2-ton misloading prevention device 5, the following misloading preventing means is employed. Since the shape of the 4-ton container C4 is larger than that of the 2-ton container C2, the second engaging portion 163 of the 4-ton container C4 is placed on the ground as shown in FIG. The first engaging portion 162 is provided above the first engaging portion 162. In the operation mode for 4 tons (the mode in which the hook arm 16 is fixed and operated in the hook upright state), the cargo handling arm 14 is rotated to the rear limit position A4. The hook 15 of the hook arm 16 is set so as to be disposed between the second engaging portion 163 of the 4-ton container C4 and the first engaging portion 162 of the 2-ton container C2. That is, in the operation mode for 4 tons, the hook 15 is set so as not to engage with the first engaging portion 162, and this functions as an erroneous stacking prevention means. On the other hand, in the operation mode for 2 tons, the cargo handling arm 14 is rotated to the rear limit position A4 and the hook arm 16 is rotated rearward so that the hook is fully tilted (rear limit rotation position B4) or close thereto. Stop in the state and loading begins. In this state, as shown in FIG. 5B, the hook 15 is set to be disposed below the first engaging portion 162, and the hook 15 is satisfactorily engaged with the first engaging portion 162. Can be made.

  Further, the 4-ton container C4 is different in that it is fixed on the chassis 3 by the second locking part 121 of the locking device 6. As shown in FIG. 13B, the locking part 161 of the container 4 for 4 tons is locked in the locking hole 137 of the second lock body 136 of the second lock part 121.

  Another difference is that the hook arm 16 is kept upright after the container C4 is loaded.

  In the 4-ton container C4, the pin provided on the container and the hook member 212 of the splash prevention device 210 are engaged. That is, the container C4 is securely and firmly fixed on the chassis 3 by the lock device 6, the splash prevention device 210, and the hook 15 of the hook arm 16. The container handling vehicle 1 can be run while the container C4 is stabilized.

  When the container C is not loaded, the cargo handling arm 14 and the hook arm 16 are slid to the front position of the chassis 3 in any operation mode. This is in consideration of the balance of the vehicle and the like, and can travel safely without hindering vehicle travel.

  Next, the dumping operation of the container C will be described. When performing the dumping work, it is necessary to integrally fix the cargo handling arm 14 and the dump frame 12 by the dump lock device 200 as described above. When tilting up the container C, first, the switch for tilting up the remote controller in the cab 2 is turned on. When the loaded container C is the 2-ton container C2, the operation is started with the hook arm 16 being rotated to the rear limit rotation position B4 (the hook fully tilted state).

Whether or not the hook arm 16 is in this state is determined by whether or not the detection plate 84 is detected by the third and fourth sensors 85 and 86. That is, when the hook arm 16 is located at the rear limit rotation position B4, the third sensor 85 is in an undetected state and the fourth sensor 86 is in a detected state. In this case, the first hydraulic cylinder 30 is operated by the control unit based on the switch operation, and the two-ton container C2 held by the hook 15 of the hook arm 16 and the jump-up preventing device is transferred to the cargo handling arm 14 and the dump frame 12. Together with this, the door is tilted up and opened, and a door (not shown) provided at the rear end of the container C2 so as to be opened and closed is opened. Thereby, a load such as dust in the container C2 is discharged. On the other hand, when the hook arm 16 is not located at the rear limit rotation position B4, a signal is sent to the control unit by the sensors 85 and 86 that detect this state, and even if the switch is turned on, the first hydraulic cylinder 30 is turned on. Does not operate, the second hydraulic cylinder 31 is extended, and the position of the hook arm 16 is adjusted to rotate fully to the hook. As a result, the 2-ton container C2 can be tilted up and down.

  When tilting up the 4-ton container C4, the switch is turned on with the hook arm 16 standing upright. If both the third and fourth sensors 85 and 86 are in the detection state, the first hydraulic cylinder 30 is operated by the control unit based on the switch operation, and the container C4 is tilted up. On the other hand, when both the sensors 85 and 86 are not in the detection state, the second hydraulic cylinder 31 is contracted and the position of the hook arm 16 is rotated and adjusted to the hook upright state. Thereby, it is possible to tilt up and down the 4-ton container C4.

  In this way, by appropriately adjusting the position of the hook arm 16 at the start of tilt-up according to the type of the container C, each container C can be handled without difficulty and work can be performed safely. There is an advantage to become. The container C is configured to be tilted down regardless of the rotation angle of the hook arm 16.

  In the above-described embodiment, the 2-ton container C2 is configured as the first container and the 4-ton container C4 is configured as the second container. However, the present invention is not limited to this. . The first container and the second container may be constituted by containers C having different shapes.

  Further, the “plural types of containers” referred to in the present invention is not limited to two types as in the above embodiment.

  Furthermore, the specific angle formed by the cargo handling arm 14 and the hook arm 16 does not matter when each container C is attached or detached. Such an angle should be appropriately changed according to the size and shape of the container C and the chassis 3.

  In addition, in order to rotate the cargo handling arm 14 and the hook arm 16, the hydraulic circuit portions 52 and 53 having the relief valves 63 and 64 are provided in the above embodiment, but the arms 14 and 16 are driven to rotate. The means is not limited to this.

  The erroneous stacking prevention device 5 may be configured as shown in FIG. 18, for example. That is, a pair of facing pieces 94 and 95 are rotatably provided via the support shaft 92 at the rear end portion of the attachment member 93 fixed to the side member 10 a of the cargo handling frame 10. A rotatable roller 96 is provided between the front ends of the opposing pieces 94 and 95, and a connecting piece 220 is attached to the base end of the outer opposing piece 95 so as to form a side shape together with the opposing piece 95. It has been. A pair of attachment pieces 221 that are pivotally attached to the distal end of the connecting piece 220 are disposed to face each other. A coil spring 101 is mounted between a mounting shaft 222 provided between the front ends of the pair of mounting pieces 221 and an L-shaped angle 223 fixed to the side member 10a, and the lever 90 is normally raised (when the container is not loaded). It is comprised so that. A detection piece 98 protrudes from the outer end surface of the support shaft 92 in a direction perpendicular to the support shaft 92, and a sensor 91 made of a proximity sensor is opposed to the side surface of the distal end to detect the detection piece 98. The mounting angle 102 is provided. In the upright state of the lever 90, the side surface of the tip of the detection piece 98 and the sensor 91 are opposed to each other.

  Also in this case, the rotation of the lever 90 by the bottom surface of the container C, the detection of the lever 90 by the sensor 91, a series of controls by the control unit based on such detection, and the like are performed in the same manner as in the above embodiment. In the present embodiment, the same effects as those of the above embodiment can be obtained.

  The locking device 6 can also be configured as follows. As shown in FIG. 19, the lock portion 169 of the lock device 6 pivotally supports a rotating rod 170 on the side frame 12 a of the dump frame 12 and has a substantially L-shaped side surface at the tip. A lock main body 171 is provided. The one end 171a side of the lock body 171 is the same as the first lock body 126 of the above-described embodiment so that the locking portion 160 of the container 2 for C2 can be locked as shown in FIG. A locking hole 172 is formed in the back plate 173. Further, as shown in FIG. 20B, the second lock main body 136 of the above embodiment is provided on the other end 171b side of the lock main body 171 so that the lock 161 of the 4-ton container C4 can be locked. The same locking hole 174 is formed.

  The lock body 171 is detected by sensors 175 and 176 arranged in front of or behind the lock body 171 rotated to a predetermined position. Further, the lock state by the lock body 171 is provided on the side frame 12a and a through hole (not shown) provided in the rotary rod 170 and the lock body 171 with a lock pin 147 having the same configuration as that of the above embodiment. This is done by passing through the through-hole 178 of the flange 177. In this case, the same presentation means as in the above embodiment is provided.

  In the locking device 6 according to the present embodiment, since the lock main body 171 is configured to be able to fix both the containers C2 and C4, the entire configuration can be simplified as compared with the above embodiment. There is. Of course, the locking device 6 in the present embodiment can also obtain the same operational effects as the above-described embodiment.

  Further, the locking device 6 may be configured to be operated automatically using a separate driving means instead of manually as in the above embodiment. For example, as shown in FIGS. 21 and 22, the first lock portion 230 for fixing the container 2 for 2 tons is fixed to each side frame 12a of the dump frame 12 as in the above embodiment. 231, a mounting shaft 232 that is rotatably mounted between the two fixing members 231, and a first lock body 233 that is pivotally supported by the mounting shaft 232 and rotatably mounted on the fixing member 231. It is driven by a fourth hydraulic cylinder 234 as one drive means. A bent portion 235 is formed on the upper side of the first lock main body 233, and a locking plate 160 of the container 2 for two tons can be locked to the back plate 236 constituting the bent portion 235. The stop hole 237 is formed as in the above embodiment. In addition, a sensor 239 including a proximity switch is attached to the back surface portion 238 of the fixing member 231, and the standing or tilting state of the first lock body 233 is detected.

  Further, one end of a rotating rod 241 is rotatably attached to the rod 240 of the fourth hydraulic cylinder 234. The central portion of the rotating rod 241 is rotatably supported by a fixed shaft 242 installed between the side frames 12a. Further, the first lock body is connected via the connecting rod 243 rotatably connected to the other end of the rotating rod 241, the swing rod 244 rotatably connected to the connecting rod 243, and the mounting shaft 232. 233 is configured to rotate.

  On the other hand, the second lock portion 245 for fixing the container 4 for 4 tons is similarly fixed to each of the side frames 12a of the dump frame 12 and the fixing member 246 via the mounting shaft 247. The second lock body 248 is rotatably provided and is driven by a fifth hydraulic cylinder 249 as second drive means. As in the above embodiment, the second lock main body 248 has a front surface and a rear surface opened to form a locking hole (not shown). In addition, a sensor 251 serving as a detection means including a proximity switch is attached to the back surface portion 250 of the fixing member 246, and the standing or tilting state of the second lock body 248 is detected.

  A slide shaft 253 is fixed to the rod 252 of the fifth hydraulic cylinder 249. At both ends of the slide shaft 253, one end of a rotation rod 254 is rotatably attached. The central part of the rotating rod 254 is rotatably supported on the fixed shaft 242. The second lock main body 248 is connected to the other end of the rotating rod 254 via the connecting rod 255 rotatably connected to the connecting rod 255, the swinging rod 256 rotatably connected to the connecting rod 255, and the mounting shaft 247. It is configured to rotate. In this case, the same presentation means as in the above embodiment is provided.

  In the present embodiment, the first lock body 233 and the second lock body 248 can be raised or tilted to be switched by the switch operation provided in the cab 2 or the like. As a result, the burden on the operator can be reduced.

  Whether the switching operation is correct or not can be detected by the sensors 239 and 251. Therefore, any one of the lock main bodies 233 and 248 corresponding to the shape of the container C to be loaded can be made effective by standing up. As a result, the loading container C is securely and firmly fixed to the chassis 3.

  It should be noted that the shape of the container handling vehicle 1 and the container C and other specific components can be arbitrarily changed within the intended scope of the present invention.

  As described above, the present invention is useful in a container handling vehicle capable of loading containers.

It is a side view showing a container handling vehicle according to an embodiment. It is a top view which shows the principal part of the container cargo handling vehicle. It is the same side view. It is a hydraulic circuit for container handling vehicles. It is a front view of the storage box for storing hydraulic piping. (A) And (b) is a top view of a storage box. (A) thru | or (d) is a side view which shows the detection state of the rotation position of a cargo handling arm. It is a side view which shows the base end part of a cargo handling arm. It is a side view which shows the detection state of the rotation position of a cargo handling arm and a hook arm. 1 shows an erroneous stacking prevention device according to an embodiment, where (a) is a side view and (b) is a plan view. It is a side view which shows the detection state of the container by a misloading prevention apparatus. (A) And (b) is a side view of a locking device. (A) And (b) is a front view of a locking device. (A) And (b) is a side view which shows loading operation of a container. (A) And (b) is a side view which shows loading operation of a container. (A) And (b) is a side view which shows loading operation of a container. It is a side view which shows the loading state of a container. Another embodiment of a misloading prevention apparatus is shown, (a) is a side view, (b) is a top view. (A) And (b) is a side view which shows other embodiment of a locking device. (A) And (b) is a front view which shows other embodiment of a locking device. It is a side view which shows other embodiment of a locking device. It is a top view which shows other embodiment of a locking device. (A) And (b) is a front view which shows arrangement | positioning of the hook and the engaging part of each container at the time of a loading start.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Vehicle 3 Chassis 14 Arm 15 Hook 16 Hook arm 162 1st engaging part 163 2nd engaging part C Container

Claims (2)

A container handling vehicle equipped with a cargo handling device capable of detaching a plurality of types of containers having different shapes on a chassis,
The cargo handling device includes a cargo handling arm that is pivotably movable in the front-rear direction, a hook arm that is pivotally movable in the longitudinal direction on the cargo handling arm, and a hook that is provided at the tip of the hook arm,
In addition, a control unit that can control the rotation operation of each arm so that the angle formed by the cargo handling arm and the hook arm is changed according to the type of the container when the container is attached or detached ,
The plurality of types of containers include a first container having a first engagement portion that engages with the hook, and a second engagement portion that is disposed at a position higher than the engagement portion of the first container. A container,
The control unit, when loading the second container, the hook is disposed at a height position between the first engagement portion and the second engagement portion, and when loading the first container, A container handling vehicle configured to be controllable so that the hook arm is pivoted rearward and the hook is disposed at a position below the first engagement portion . In container handling vehicle according to claim 1 Symbol placement,
In order to rotate the cargo handling arm and the hook arm, a hydraulic circuit portion having a plurality of relief valves is provided,
When the operation mode of each of the arms is changed in accordance with the type of container to be loaded, the control unit activates any one of the relief valves corresponding to the operation mode so as to relieve the hydraulic circuit unit. A container handling vehicle configured to change pressure.

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