Cargo handling vehicle

Abstract

To provide a cargo handling vehicle capable of maintaining suppression of jumping of a container even if a spring of a container jumping suppression device is broken.SOLUTION: The cargo handling vehicle includes a cargo handling device, and the cargo handling device includes a device frame fixed to a vehicle body, a dump arm rotatably connected to the device frame, and a container jumping-up suppressing device for suppressing jumping-up of a container with respect to the dump arm. The container jumping-up suppression device includes a container lock hook having a base end portion rotatably connected to the dump arm and a tip end portion hooked on a locked portion of the container, a spring configured to bias the container lock hook in a locking direction in which the tip end portion presses the locked portion from above, and a rotation stopper configured to restrict rotation of the container lock hook in an unlocking direction.SELECTED DRAWING: Figure 14

Description

[Technical Field]

[0001] The present specification relates to a material handling vehicle. [Background technology]

[0002] BACKGROUND ART A cargo handling vehicle for transporting containers (also called a container transport vehicle) includes a vehicle body and a cargo handling device for loading and unloading containers between the vehicle body and the ground.

[0003] Patent Document 1 listed below discloses a container bounce-up suppression device for preventing a container loaded on a vehicle body from bouncing up. This container bounce-up suppression device uses a spring to bias an arm-shaped engaging member whose base end is rotatably supported, and holds down the container by hooking the tip of the engaging member onto an engaged member on the container side.

[0004] However, if the spring were to break, the engaging member would become free to rotate, and would move away from the engaged member on the container side, potentially making it impossible to prevent the container from bouncing up. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Patent No. 3110243 Summary of the Invention [Problem to be solved by the invention]

[0006] Therefore, the problem is to provide a cargo handling vehicle that can maintain the container bounce prevention function even if the spring of the container bounce prevention device breaks. [Means for solving the problem]

[0007] The cargo handling vehicle includes a vehicle body and a cargo handling device connected to the vehicle body and configured to load and unload containers between the vehicle body and the ground; The cargo handling device includes an equipment frame fixed to the vehicle body, a dump arm rotatably connected to the equipment frame, a lift arm rotatably connected to the dump arm, a hook arm movably connected to the lift arm, and a container bounce-up suppression device that suppresses the container from bouncing up relative to the dump arm, The container bounce suppression device is a container lock hook having a base end rotatably connected to the dump arm and a tip end hooked onto a locked portion of the container; a spring that biases the container lock hook in a locking direction in which the tip portion presses the locked portion from above; a rotation prevention portion that restricts rotation of the container lock hook in an unlocking direction opposite to the locking direction, The anti-rotation portion comes into contact with a part of the container locking hook before the container locking hook rotates in the unlocking direction to a position where the tip portion does not overlap the locked portion in the vertical direction. [Brief explanation of the drawings]

[0008] [Figure 1] Overall view of a cargo handling vehicle according to this embodiment. [Figure 2] 1 is a flow chart of a work flow of a cargo handling vehicle according to the present embodiment (a: unloading work flow chart, b: loading work flow chart). [Figure 3] 1 is an explanatory diagram of a loading and unloading operation of a cargo handling vehicle according to the present embodiment; [Figure 4] 1 is an explanatory diagram of a loading and unloading operation of a cargo handling vehicle according to the present embodiment; [Figure 5] 1 is an explanatory diagram of a loading and unloading operation of a cargo handling vehicle according to the present embodiment; [Figure 6] 1 is an explanatory diagram of a loading and unloading operation of a cargo handling vehicle according to the present embodiment; [Figure 7] 1 is an explanatory diagram of a cargo moving operation of a cargo handling vehicle according to the present embodiment; [Figure 8] 1 is an explanatory diagram of a dumping operation of a cargo handling vehicle according to the present embodiment; [Figure 9] 1 is a control block diagram of a cargo handling vehicle according to the present embodiment; [Figure 10] Control block diagram of the processing apparatus according to the present embodiment. [Figure 11] 1A and 1B are a plan view and a front view of a cargo handling device according to an embodiment of the present invention; [Figure 12] Enlarged view of region XII in Figure 11 [Figure 13] Cross section of line XIII-XIII in Figure 12 [Figure 14] FIG. 10 is a view showing a state in which the anti-rotation portion according to the embodiment comes into contact with a part of the container lock hook. [Figure 15] FIG. 10 is a view showing a state in which a rotation prevention portion according to another embodiment comes into contact with a part of a container lock hook. [Figure 16] An explanatory diagram of a loading and unloading operation of a cargo handling vehicle according to another embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0009] In each drawing, the dimensions of the components may be enlarged or reduced relative to the actual dimensions, for example, to facilitate understanding, and the dimensional ratios between the drawings may not be consistent. Note that in each drawing, for example, to facilitate understanding, some of the components may be omitted.

[0010] Terms including ordinal numbers such as "first" and "second" are used to describe various components, but these terms are used only to distinguish one component from another, and the components are not particularly limited by these terms. The number of components including ordinal numbers is not particularly limited, and may be, for example, one. Furthermore, the ordinal numbers used in the following specification and drawings may differ from the ordinal numbers described in the claims.

[0011] An embodiment of a cargo handling vehicle will be described below with reference to Figures 1 to 14. Note that the following embodiment is provided as an example to aid in understanding the configuration of the cargo handling vehicle, and is not intended to limit the configuration of the cargo handling vehicle.

[0012] As shown in Fig. 1, the cargo handling vehicle 1 includes a vehicle body 2 and a cargo handling device 3 connected to the vehicle body 2. The cargo handling vehicle 1 may also include a processing device 4. The vehicle body 2 may include, for example, as in this embodiment, a driver's cab 2a disposed at the front, a vehicle body frame 2b disposed at the rear, and a plurality of wheels 2c.

[0013] In the following description and drawings, the first direction D1 is also referred to as the front-to-rear direction (also referred to as the "first lateral direction") D1, the second direction D2 is also referred to as the left-to-right direction (also referred to as the "second lateral direction") D2, and the third direction D3 is also referred to as the up-down direction D3. That is, each of the directions D1 to D3 is a direction seen from the perspective of a person (driver) sitting in the driver's seat in the driver's cab 2a of the cargo handling vehicle 1 when the cargo handling vehicle 1 is traveling.

[0014] Of the front-to-rear direction D1, the direction of the arrow in the figure is the front direction, and the direction opposite to the arrow direction in the figure is the rear direction. Furthermore, of the left-to-right direction D2, the direction of the arrow in the figure is the left direction, and the direction opposite to the arrow direction in the figure is the right direction. Furthermore, of the up-down direction D3, the direction of the arrow in the figure is the up direction, and the direction opposite to the arrow direction in the figure is the down direction.

[0015] As in the present embodiment, the cargo handling vehicle 1 may include, for example, an engine 5 and a drive switching unit (also referred to as a "power take-off (PTO)") 6 that can switch the destination of the drive power of the engine 5. The drive switching unit 6 may be switchable, for example, between a first state (travelable state) in which the drive power of the engine 5 is transmitted to the wheels 2c, and a second state (workable state) in which the drive power of the engine 5 is transmitted to the cargo handling device 3.

[0016] The cargo handling device 3 loads and unloads the container 7 between a position where it is placed on the vehicle body 2 (see FIG. 3(a)) and a position where it is placed on the ground (see FIG. 6).

[0017] The cargo handling device 3 may include, for example, as in this embodiment, a device frame 8 fixed to the vehicle body frame 2b, a dump arm 9 rotatably connected to the device frame 8, a lift arm 10 rotatably connected to the dump arm 9, and a hook arm 11 rotatably connected to the lift arm 10. The hook arm 11 may include, for example, as in this embodiment, a hook 11a at its tip for hanging the container 7.

[0018] The cargo handling device 3 may include, for example, as in this embodiment, a lift cylinder 12 that connects the device frame 8 and the lift arm 10, and a hook cylinder 13 that connects the lift arm 10 and the hook arm 11. The cargo handling device 3 may also include, for example, as in this embodiment, a locking mechanism 14 that can be switched between a locked state in which the dump arm 9 and the lift arm 10 are locked and an unlocked state in which the lock is released.

[0019] As a result, when the locking mechanism 14 is set to the unlocked state, the lift arm 10 rotates relative to the dump arm 9, allowing the container 7 to be loaded / unloaded (see Figures 3 to 6) and the load moving operation (see Figure 7). On the other hand, when the locking mechanism 14 is set to the locked state, the lift arm 10 and the dump arm 9 rotate together relative to the equipment frame 8, allowing the container 7 to be dumped (see Figure 8).

[0020] Although not particularly limited, for example, as in this embodiment, the cylinders 12, 13 may be hydraulic cylinders, and the cargo handling device 3 may include a hydraulic pump 3a and valves 3b (see FIG. 9), etc. As a result, the hydraulic pump 3a is operated by driving the engine 5, and the plurality of valves 3b are opened and closed, causing the cylinders 12, 13 to expand and contract.

[0021] The cargo handling vehicle 1 may, for example, as in this embodiment, be equipped with a vehicle body inclination angle detection unit 15 that detects the inclination angle θ1 of the vehicle body 2 with respect to the horizontal (see the dashed line in FIG. 1), a lift inclination angle detection unit 16 that detects the inclination angle of the lift arm 10 with respect to the horizontal, and a hook inclination angle detection unit 17 that detects the inclination angle of the hook arm 11 with respect to the horizontal. Note that the configuration of each inclination angle detection unit 15 to 17 is not particularly limited, and may be, for example, a sensor that can detect the inclination angle of each unit 2, 10, 11 with respect to the horizontal.

[0022] Here, we will explain the operations of the cargo handling apparatus 3, specifically, loading and unloading operations, cargo moving operations, and dumping operations. As will be explained below, the cargo handling apparatus 3 is an apparatus that has a plurality of operation processes.

[0023] First, the unloading operation among the loading and unloading operations will be described with reference to FIG. 2(a) and FIGS. 3 to 6. FIG.

[0024] As shown in FIG. 3(a), when the cargo handling apparatus 3 is in the initial state, the container 7 is placed on the vehicle body 2. Then, in the rear swing process, the hook cylinder 13 (not shown in FIGS. 3 to 8) extends, causing the hook arm 11 to rotate rearward (clockwise in each of the figures). As a result, as shown in FIG. 3(b), the cargo handling apparatus 3 enters the first unloading state. Note that in the rear swing process, the lift cylinder 12 (not shown in FIGS. 3 to 8) does not extend or retract.

[0025] Furthermore, although not particularly limited, for example, as in this embodiment, the rotation of the hook arm 11 relative to the lift arm 10 may be linked to the switching of the lock mechanism 14 (see FIG. 1). Specifically, the lock mechanism 14 (see FIG. 1) may be switched from a locked state to an unlocked state by the hook arm 11 rotating backward relative to the lift arm 10.

[0026] Then, in the first unloading lifting process, the lift cylinder 12 extends, causing the lift arm 10 to rotate backward (clockwise in each drawing) relative to the dump arm 9 (see FIG. 1). As a result, the cargo handling device 3 enters the second unloading state, as shown in FIG. 4(a). Note that in the first unloading lifting process, the hook cylinder 13 does not extend or retract.

[0027] Then, in the second unloading lifting step, not only the lift cylinder 12 but also the hook cylinder 13 extends, causing the lift arm 10 and the hook arm 11 to rotate backward, respectively. As a result, the cargo handling device 3 enters the third unloading state as shown in FIG. 4(b).

[0028] Then, in the third unloading lifting step, the lift cylinder 12 extends, causing the lift arm 10 to rotate backward. As a result, the cargo handling device 3 enters the fourth unloading state, as shown in Figure 5(a). Note that in the third unloading lifting step, the hook cylinder 13 does not extend or retract.

[0029] In the fourth unloading lifting step, the lift cylinder 12 extends, causing the lift arm 10 to rotate backward, while the hook cylinder 13 retracts, causing the hook arm 11 to rotate forward (counterclockwise in each figure). As a result, the cargo handling device 3 enters the fifth unloading state as shown in Figure 5(b).

[0030] Then, in the final unloading lifting process, the lift cylinder 12 extends, causing the lift arm 10 to rotate backward. As a result, the container 7 is placed on the ground as shown in Figure 6, and the cargo handling device 3 reaches the completed state. Note that in the final unloading lifting process, the hook cylinder 13 does not extend or retract.

[0031] Next, the loading operation among the loading and unloading operations will be described with reference to FIG. 2(b) and FIGS.

[0032] As shown in Figure 6, when the cargo handling apparatus 3 is in the initial state, the container 7 is placed on the ground. Then, in the first loading lifting step, the lift cylinder 12 extends, causing the lift arm 10 to rotate forward (counterclockwise in each figure). As a result, as shown in Figure 5(b), the cargo handling apparatus 3 enters the first loading state. Note that in the first loading lifting step, the hook cylinder 13 does not extend or retract.

[0033] Then, in the second loading lifting step, the lift cylinder 12 contracts, causing the lift arm 10 to rotate forward, while the hook cylinder 13 extends, causing the hook arm 11 to rotate backward, thereby placing the cargo handling device 3 in the second loading state as shown in Figure 5(a).

[0034] Then, in the third loading lifting step, the lift cylinder 12 contracts, causing the lift arm 10 to rotate forward. As a result, the cargo handling device 3 enters the third loading state, as shown in Figure 4(b). Note that in the third loading lifting step, the hook cylinder 13 does not extend or retract.

[0035] Then, in the fourth loading lifting step, not only the lift cylinder 12 but also the hook cylinder 13 is retracted, causing the lift arm 10 and the hook arm 11 to rotate forward, respectively. As a result, the cargo handling device 3 enters the fourth loading state as shown in FIG. 4(a).

[0036] Then, in the final loading lifting process, the lift cylinder 12 contracts, causing the lift arm 10 to rotate forward. As a result, the cargo handling device 3 enters the fifth loading state, as shown in Figure 3(b). Note that in the final loading lifting process, the hook cylinder 13 does not extend or retract.

[0037] Then, in the forward swing process, the hook cylinder 13 contracts, causing the hook arm 11 to rotate forward. As a result, as shown in Figure 3(a), the container 7 is placed on the vehicle body 2, and the cargo handling device 3 reaches the completed state. Note that in the forward swing process, the lift cylinder 12 does not contract or retract.

[0038] Next, regarding the pre-load transfer work among the load transfer work, we will explain it with reference to Figures 6 and 7(a). explain.

[0039] As shown in Figure 6, when the cargo handling device 3 is in the initial state, the hook 11a of the hook arm 11 is hooked onto the container 7 resting on the ground. Then, in the cargo front movement process, the lift cylinder 12 contracts, causing the lift arm 10 to rotate forward, while the hook cylinder 13 extends, causing the hook arm 11 to rotate backward. As a result, the container 7 moves forward, as shown in Figure 7(a), and the cargo handling device 3 reaches the completed state.

[0040] Next, among the load moving operations, the load post-moving operation will be described with reference to FIG. 6 and FIG. 7(b).

[0041] As shown in Figure 6, when the cargo handling device 3 is in the initial state, the hook 11a of the hook arm 11 is hooked onto the container 7 resting on the ground. Then, in the cargo rearward movement process, the lift cylinder 12 extends, causing the lift arm 10 to rotate backward, while the hook cylinder 13 retracts, causing the hook arm 11 to rotate forward. As a result, the container 7 moves backward as shown in Figure 7(b), and the cargo handling device 3 reaches the completed state.

[0042] Next, the dump lifting operation, which is one of the dump operations, will be described with reference to FIG.

[0043] As shown in Figure 8(a), when the cargo handling apparatus 3 is in the initial state, the container 7 is horizontal. Then, during the dump lifting process, because the locking mechanism 14 (see Figure 1) is in the locked state, the lift cylinder 12 extends, causing the dump arm 9 and the lift arm 10 to rotate backward together. As a result, as shown in Figure 8(b), the container 7 tilts, and the cargo handling apparatus 3 reaches the completed state.

[0044] Next, the dump lowering operation, which is one of the dump operations, will be described with reference to FIG.

[0045] As shown in Figure 8(b), when the cargo handling apparatus 3 is in the initial state, the container 7 is tilted. Then, in the dump lowering process, the lift cylinder 12 contracts, causing the dump arm 9 and the lift arm 10 to rotate forward together. As a result, the container 7 becomes horizontal as shown in Figure 8(a), and the cargo handling apparatus 3 reaches the completed state.

[0046] 9, the cargo handling vehicle 1 may include, for example, a lock detection unit 18 that detects the locked state of the lock mechanism 14 (for example, that it is in a locked state), a lift position detection unit 19 that detects the position of the lift arm 10 (for example, the lift arm 10 positioned at a reference position), and a hook position detection unit 20 that detects the position of the hook arm 11 (for example, the hook arm 11 positioned at a reference position). Although not particularly limited, each of the detection units 18 to 20 may be, for example, various types of sensors (for example, a proximity sensor, a contact sensor, a photoelectric sensor, etc.).

[0047] In this embodiment, the hydraulic pump 3a is operated by driving the engine 5, and therefore the rotation speed of the hydraulic pump 3a is controlled by the rotation speed of the engine 5. As a result, the operating speed of each of the cylinders 12, 13 changes depending on the hydraulic pressure (the rotation speed of the hydraulic pump 3a), and therefore the operating speed of each of the cylinders 12, 13 is controlled by controlling the rotation speed of the engine 5.

[0048] Furthermore, the cargo handling vehicle 1 may include, for example, an input unit 21 to which various data are input, and an output unit 22 to output various data. As in the present embodiment, the output unit 22 may include, for example, a display unit (e.g., an electronic bulletin board, a signal light) 22a that displays data, a sound generation unit (e.g., a buzzer, a speaker) 22b that emits the data as sound, and an external output unit 22c that outputs data to the outside (e.g., a terminal device, etc.).

[0049] 10, the processing device 4 is a computer including, for example, a processor 401, a memory 402, and various interfaces 403. For example, the memory 402 stores a program 402a and a database 402b, the processor 401 executes the program 402a, and the various components of the processing device 4 are realized by the software and hardware working together.

[0050] The processor 401 is configured to be capable of executing computer-executable instructions. The processor 401 is not limited to a central processing unit (CPU), a microprocessor (MPU), or the like.

[0051] The memory 402 is configured to be able to store computer data. The memory 402 includes not only a memory that temporarily stores data when the processor 401 executes processing, but also a storage that permanently stores data. The memory 402 is not particularly limited, and may be, for example, a semiconductor memory (various ROMs, various RAMs, etc.), an optical disk (CD, DVD, etc.), a magnetic disk (hard disk, MO, etc.), a magnetic tape, a storage medium using a flash memory (SD card, USB memory, etc.), etc.

[0052] 9, the processing device 4 may include, for example, an acquisition unit 4a that acquires each piece of data from each unit 15 to 21, a storage unit 4b that stores each piece of data, a calculation unit 4c that calculates each piece of data, and a control unit 4d that controls each unit 3, 5, 22. Then, for example, the calculation unit 4c and the control unit 4d may be configured as a processor 401 (see FIG. 10), and the acquisition unit 4a and the storage unit 4b may be configured as a memory 402 (see FIG. 10).

[0053] As a result, the processor 401 executes a program 402a (see FIG. 10) stored in the memory 402, and the software and hardware work together to realize the units 4a to 4d of the processing device 4. The processing device 4 may be configured, for example, by a software circuit, or may be configured, for example, by a hardware circuit, or may be configured, for example, by a combination of a software circuit and a hardware circuit.

[0054] The processing device 4 may be configured as a single device, or may be configured as a plurality of devices that can communicate with each other. Specifically, the units 4a to 4d of the processing device 4 may be provided in a single device, or may be distributed across a plurality of devices that can communicate with each other.

[0055] The processing device 4 controls the units 3, 5, and 22 by outputting output data (output signals, output information) to the units 3, 5, and 22 based on input data (input signals, input information) acquired from the units 15 to 21. Specifically, the processing device 4 controls the cargo handling device 3 by acquiring input data from the units 15 to 21 and outputting output data to the units 3a and 3b of the cargo handling device 3.

[0056] In the cargo handling vehicle 1, the container 7 may bounce up relative to the dump arm 9 due to vibrations from the road surface while traveling or tilting during dumping. For this reason, the cargo handling device 3 is provided with a container bounce suppression device 30 that suppresses the container 7 from bouncing up relative to the dump arm 9.

[0057] As shown in FIG. 11(a), the dump arm 9 includes a pair of arm members 91, 91 extending in the front-rear direction D1, and a support member 92 connected to the pair of arm members 91, 91 and extending in the left-right direction D2.

[0058] 12 and 13, the support member 92 may include a horizontal frame 93 having both ends fixed to a pair of arm members 91, 91, and a pair of brackets 94, 94 fixed to the horizontal frame 93. The horizontal frame 93 may be formed, for example, from a square steel pipe. The pair of brackets 94, 94 are substantially triangular plate-shaped members and are arranged along the front-rear direction D1.

[0059] As shown in Figures 12 and 13, the container bounce-up suppression device 30 may include a container lock hook 31 rotatably connected to the dump arm 9 and a spring 32 that biases the container lock hook 31.

[0060] As shown in Fig. 13, the container lock hook 31 has a substantially linear base end 31a and a substantially L-shaped tip end 31b, and is connected to a spring 32 between the base end 31a and the tip end 31b. The base end 31a extends in a direction inclined rearward. The tip end 31b extends from the base end 31a in the same direction as the base end 31a and then bends rearward. The base end 31a is rotatably connected to a pair of brackets 94, 94 by a pin 95.

[0061] The tip end 31b is hooked from above onto the locked portion 7a of the container 7. The locked portion 7a of the container 7 is a rod-shaped member that extends in the left-right direction D2 and is provided on the bottom of the container 7. The locked portion 7a is, for example, a rod-shaped member having a circular cross section.

[0062] One end 32a of the spring 32 is connected to the container lock hook 31, and the other end 32b is connected to the dump arm 9. The other end 32b may be connected to the rotation shaft 96 of the dump arm 9 via a bracket. The one end 32a is located higher than the other end 32b, and the spring 32 urges the container lock hook 31 downward. As a result, the tip end 31b of the container lock hook 31 is urged in the locking direction (clockwise in each drawing) that presses the locked portion 7a from above, thereby appropriately suppressing the container 7 from bouncing up.

[0063] The container locking hook 31 is biased in the locking direction by the spring 32, but if the spring 32 were to break, the container locking hook 31 would become freely rotatable, which could result in the container locking hook 31 rotating in the direction opposite to the locking direction and moving away from the locked portion 7a, making it impossible to prevent the container 7 from bouncing up. For this reason, the container bouncing prevention device 30 according to this embodiment is provided with a rotation prevention portion 33 that restricts the rotation of the container locking hook 31 in the unlocking direction (counterclockwise in each drawing), which is opposite to the locking direction.

[0064] 14, the anti-rotation portion 33 comes into contact with the first abutment portion 31c of the container lock hook 31 before the container lock hook 31 rotates in the unlocking direction to a position where the tip portion 31b does not overlap the locked portion 7a in the up-down direction D3. Preferably, the anti-rotation portion 33 comes into contact with the first abutment portion 31c of the container lock hook 31 before the container lock hook 31 rotates in the unlocking direction and the spring 32 reaches its maximum extension.

[0065] The anti-rotation portion 33 may be, for example, a lower portion of the front end surface of the horizontal frame 93, as in this embodiment. Also, the first abutment portion 31c of the container lock hook 31 may be, for example, a lower end portion of the rear surface of the base end portion 31a, as in this embodiment. The first abutment portion 31c is located below the pin 95, which is the rotation center of the container lock hook 31. The first abutment portion 31c may be formed as a flat surface so as to be in surface contact with the anti-rotation portion 33.

[0066] 13, the container bounce-up suppression device 30 may also include a holding portion 34 that restricts rotation of the container locking hook 31 in the locking direction. The holding portion 34 may be, for example, an upper portion of the front end surface of the horizontal frame 93, as in this embodiment. The holding portion 34 comes into contact with the second abutment portion 31d of the container locking hook 31 that is biased in the locking direction. This causes the container locking hook 31 to be held in an upright position with the tip end portion 31b higher than the dump arm 9. The second abutment portion 31d is located higher than the pin 95, which is the rotation center of the container locking hook 31.

[0067] As described above, the cargo handling vehicle 1, as in this embodiment, The vehicle comprises a vehicle body 2, and a loading and unloading device 3 connected to the vehicle body 2 and configured to load and unload a container 7 between the vehicle body 2 and the ground, The cargo handling device 3 includes a device frame 8 fixed to the vehicle body 2, a dump arm 9 rotatably connected to the device frame 8, a lift arm 10 rotatably connected to the dump arm 9, a hook arm 11 movably connected to the lift arm 10, and a container bounce-up suppression device 30 that suppresses the container 7 from bouncing up relative to the dump arm 9, The container bounce suppression device 30 is a container lock hook 31 having a base end 31a rotatably connected to the dump arm 9 and a tip end 31b that is hooked onto the locked portion 7a of the container 7; a spring 32 that biases the container lock hook 31 in a locking direction in which the tip portion 31b presses the locked portion 7a from above; a rotation prevention portion (33) that restricts rotation of the container lock hook (31) in an unlocking direction opposite to the locking direction, It is preferable that the anti-rotation portion 33 is configured to come into contact with a part of the container lock hook 31 before the container lock hook 31 rotates in the unlocking direction to a position where the tip portion 31b does not overlap with the locked portion 7a in the vertical direction D3.

[0068] According to this configuration, even if the spring 32 breaks and the container locking hook 31 attempts to rotate in the unlocking direction, the anti-rotation portion 33 comes into contact with a part of the container locking hook 31 before the tip portion 31b comes off the locked portion 7a, so that the tip portion 31b of the container locking hook 31 continues to be positioned above the locked portion 7a. As a result, even if the spring 32 of the container bounce-up suppression device 30 breaks, the container 7 can continue to be prevented from bouncing up.

[0069] In addition, in the cargo handling vehicle 1, as in this embodiment, It is preferable that the anti-rotation portion 33 be configured to come into contact with a part of the container lock hook 31 before the container lock hook 31 rotates in the unlocking direction and the spring 32 reaches its maximum extension.

[0070] According to this configuration, the anti-rotation portion 33 comes into contact with a part of the container lock hook 31 before the spring 32 reaches its maximum extension, thereby preventing the spring 32 from breaking.

[0071] In addition, as in this embodiment, the cargo handling vehicle 1 is The dump arm 9 includes a support member 92 that rotatably supports the base end portion 31a of the container lock hook 31, It is preferable that the anti-rotation portion 33 is a part of the support member 92 .

[0072] According to this configuration, there is no need to provide a separate member as the anti-rotation portion 33, and therefore the number of parts can be reduced.

[0073] The cargo handling vehicle 1 is not limited to the configuration of the above-described embodiment, nor is it limited to the above-described effects. Furthermore, it goes without saying that various modifications can be made to the cargo handling vehicle 1 without departing from the spirit of the present invention. For example, it goes without saying that one or more of the configurations, methods, etc. relating to the various modified examples described below may be arbitrarily selected and adopted in the configurations, methods, etc. relating to the above-described embodiment.

[0074] (A) In the cargo handling vehicle 1 according to the above embodiment, the anti-rotation portion 33 is configured to come into contact with a portion of the container locking hook 31 when the container locking hook 31 rotates in the unlocking direction and before the spring 32 reaches its maximum extension. However, the cargo handling vehicle 1 is not limited to this configuration. For example, the anti-rotation portion 33 may be configured to come into contact with a portion of the container locking hook 31 after the container locking hook 31 rotates in the unlocking direction and the spring 32 exceeds its maximum extension.

[0075] (B) Furthermore, in the cargo handling vehicle 1 according to the above embodiment, the dump arm 9 is equipped with a support member 92 that rotatably supports the base end 31a of the container lock hook 31, and the anti-rotation portion 33 is a part of the support member 92. However, the cargo handling vehicle 1 is not limited to this configuration. For example, as shown in FIG. 15 , the anti-rotation portion 33 may be a part of a member separate from the support member 92.

[0076] (C) Furthermore, in the cargo handling vehicle 1 according to the above embodiment, the hook arm 11 is rotatably connected to the lift arm 10. However, the cargo handling vehicle 1 is not limited to this configuration. For example, in the cargo handling vehicle 1, as shown in FIG. 16, the hook arm 11 may be connected to the lift arm 10 so as to be slidable in the front-rear direction D1.

[0077] In the unloading operation of the cargo handling vehicle 1 shown in Figure 16, when the cargo handling apparatus 3 is in the initial state, the container 7 is placed on the vehicle body 2 as shown in Figure 16(a). Then, in the rear slide stroke, the hook arm 11 moves rearward, and then, in the unloading lift stroke, the lift arm 10 rotates rearward. As a result, as shown in Figure 16(b), the container 7 is placed on the ground, and the cargo handling apparatus 3 reaches the completed state.

[0078] On the other hand, in the loading operation of the cargo handling vehicle 1 shown in Fig. 16, when the cargo handling device 3 is in the initial state, the container 7 is placed on the ground as shown in Fig. 16(b). Then, in the loading lift stroke, the lift arm 10 rotates forward, and then in the forward slide stroke, the hook arm 11 moves forward. As a result, as shown in Fig. 16(a), the container 7 is placed on the vehicle body 2, and the cargo handling device 3 reaches the completed state.

[0079] (D) It should be noted that, for example, the order of execution of each process, such as operations, procedures, steps, and stages, in the systems, methods, programs, and devices shown in the claims, specifications, and drawings, can be realized in any order, as long as the output of a previous process is not used in a subsequent process. For example, even if a description is made using "first," "next," etc. for convenience, it does not mean that execution must be in that order. [Explanation of symbols]

[0080] 1...loading vehicle, 2...vehicle body, 2a...operator's cab, 2b...vehicle body frame, 2c...wheel, 3...loading device, 3a...hydraulic pump, 3b...valve, 4...processing device, 4a...acquisition unit, 4b...storage unit, 4c...calculation unit, 4d...control unit, 5...engine, 6...drive switching unit, 7...container, 7a...locked unit, 8...device frame, 9...dump arm, 10...lift arm, 11...hook arm, 11a...hook, 12...lift cylinder, 13...hook cylinder, 14...locking mechanism, 15...vehicle body inclination angle detection unit, 16...lift inclination angle detection unit, 17...hook inclination angle detection unit, 18...lock detection unit, 19...lift position detection unit, 20...hook position detection unit, 1...input unit, 22...output unit, 22a...display unit, 22b...sound generation unit, 22c...external output unit, 30...container bounce-up suppression device, 31...container lock hook, 31a...base end, 31b...tip end, 31c...first contact portion, 31d...second contact portion, 32...spring, 32a...one end, 32b...other end, 33...rotation prevention portion, 34...holding portion, 91...arm member, 92...support member, 93...horizontal frame, 94...bracket, 95...pin, 96...rotation axis, 401...processor, 402...memory, 402a...program, 402b...database, 403...interface, θ1...tilt angle, D1...fore-and-aft direction, D2...left-right direction, D3...up-and-down direction

Claims

1. a vehicle body; and a loading and unloading device connected to the vehicle body for loading and unloading containers between the vehicle body and the ground, The cargo handling device includes an equipment frame fixed to the vehicle body, a dump arm rotatably connected to the equipment frame, a lift arm rotatably connected to the dump arm, a hook arm movably connected to the lift arm, and a container bounce-up suppression device that suppresses the container from bouncing up relative to the dump arm, The container bounce suppression device is a container lock hook having a base end rotatably connected to the dump arm and a tip end hooked onto a locked portion of the container; a spring that biases the container lock hook in a locking direction in which the tip portion presses the locked portion from above; a rotation prevention portion that restricts rotation of the container lock hook in an unlocking direction opposite to the locking direction, a loading and unloading vehicle, wherein the anti-rotation portion comes into contact with a part of the container locking hook before the container locking hook rotates in the unlocking direction to a position where the tip portion does not overlap the locked portion in the vertical direction.

2. 2. The cargo handling vehicle according to claim 1, wherein the anti-rotation portion comes into contact with a portion of the container locking hook before the container locking hook rotates in the unlocking direction and the spring reaches its maximum extension.

3. the dump arm includes a support member that rotatably supports a base end portion of the container lock hook, The cargo handling vehicle according to claim 1 or 2, wherein the anti-rotation portion is a part of the support member.

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