Loading / unloading vehicle

Abstract

To provide a loading / unloading vehicle that is able to reduce materials and structures required for reinforcement, by devising a portion with which a safety member comes into contact.SOLUTION: An unloading / loading vehicle has a lifting prevention mechanism 13 that prevents lifting of a loading portion (a load box 11). The lifting prevention mechanism 13 has: an engaging member 31 provided on a loading portion side; and a holding member 33 provided on a vehicle portion side 8. The lifting prevention mechanism is able to prevent lifting of the loading portion by causing the holding member 33 to engage with the engaging member 31 when the loading portion is brought into a substantially horizontal position. A safety member 20 is provided, which prevents the loading portion from returning to the substantially horizontal position when the loading portion is brought into an inclined posture. One end side of the safety member 20 is supported by the vehicle portion side 8, and the other end side of the safety member 20 can be engaged with the engaging member 31.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a loading vehicle such as a dump truck, a refuse collection vehicle, a container transporter, a vehicle carrier, or the like, which is provided with a function for tilting a loading portion such as a loading platform or a packing box. [Background technology]

[0002] A widely known method for unloading a load is to tilt the loading platform or the loading box. Dump trucks are a typical example, and they unload their cargo by tilting their cargo boxes (Patent Document 1). Some refuse collection vehicles also use a similar method to unload refuse from their cargo boxes (Patent Document 2). Some container transport vehicles also use a similar method to unload refuse from their cargo boxes (Patent Document 3). Vehicle transporters also tilt their loading sections when loading and unloading automobiles. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2022-147189 A [Patent Document 2] JP 2023-49621 A [Patent Document 3] JP 2021-160462 A Summary of the Invention [Problem to be solved by the invention]

[0004] For example, in a dump truck, various devices are located under the cargo box. In a dump truck, cylinders and hydraulic equipment are located under the cargo box. Wiring, piping, bearings, etc. are also located under the cargo box. It is advisable to inspect these devices periodically.

[0005] When inspecting these devices, the box is tilted (hereinafter referred to as "raising the box") and a gap is created between the box and the vehicle. That is, the box is raised, and the operator looks underneath the box and, if necessary, inserts his / her hand underneath the box to touch the device. The position of the cargo box is changed by driving a hydraulic cylinder, but if hydraulic oil leaks from the cylinder when the cargo box is raised, the cargo box will drop. Therefore, when performing an inspection, it is recommended that a brace (safety component) be placed between the cargo box and the vehicle to prevent the cargo box from falling.

[0006] The box is quite heavy. On the other hand, the cross-sectional area of ​​the brace is small. Therefore, the area where the brace touches the box needs to be reinforced with a plate to distribute the stress. The present invention proposes a cargo handling vehicle capable of reducing the amount of materials and structures required for reinforcement by devising the locations where the safety members come into contact. [Means for solving the problem]

[0007] An aspect for solving the above-mentioned problems is a loading vehicle having a vehicle section, a loading section, and a tilting means for tilting the loading section, the loading section being capable of changing its position between an approximately horizontal position and an inclined position, and having a lift-up prevention mechanism for preventing the loading section from lifting up, the lift-up prevention mechanism having a reinforcing member provided on the loading section side, an engaging member fixed to the reinforcing member, and a retaining member provided on the vehicle section side, and capable of engaging the retaining member with the engaging member to prevent the loading section from lifting up when the loading section is in an approximately horizontal position, the loading vehicle having a safety member that prevents the loading section from returning to the approximately horizontal position when the loading section is in an inclined position, and one end side of the safety member being supported on the vehicle section side, and the other end side of the safety member being directly or indirectly supported by the reinforcing member.

[0008] Here, "support" may refer to a state in which the safety member and another member are detachable and temporarily in contact with each other. "Support" also includes a structure in which the safety member and another member are always joined and cannot be detached. In other words, a structure in which the safety member is attached in a state in which it can rotate or swing relative to another member is in a "supported" state. A state in which the safety member is moved from another position or its position is changed so that it comes into contact with another member can also be said to be in a "supported" state. In short, a state in which the safety member is in contact with another member in a state in which a compressive load can be applied from the other member is "supported." The loading vehicle of this aspect is equipped with a lift-up prevention mechanism that prevents the loading section from lifting up during travel. In the lift-up prevention mechanism of this aspect, a reinforcing member is provided on the loading section side for the purpose of dispersing the force applied to the engagement member, etc. In the cargo handling vehicle of this embodiment, the reinforcing member of the lift-up prevention mechanism is used not only as a reinforcing member for the lift-up prevention mechanism itself, but also as a reinforcement for the portion with which the safety member comes into contact. According to this aspect, there is no need for a plate provided solely for the purpose of contacting the safety member, and no need for a reinforcement provided solely for the purpose of contacting the safety member, making it possible to reduce materials.

[0009] In the above aspect, it is preferable that the other end side of the safety member be capable of abutting against the engaging member.

[0010] The cargo handling vehicle of this embodiment prevents the cargo box from falling by bringing a safety member into contact with the engagement member of the lift-up prevention mechanism. That is, in the loading vehicle of this embodiment, the engagement member of the lift-up prevention mechanism is used not only as an engagement member for the retaining member of the lift-up prevention mechanism, but also as an abutment member against which the safety member abuts. According to this aspect, there is no need for a plate provided solely for the purpose of contacting the safety member, and no need for a reinforcement provided solely for the purpose of contacting the safety member, making it possible to reduce materials.

[0011] In the above aspect, it is preferable that one end side of the safety member is attached to the vehicle portion side so as to be able to swing.

[0012] According to this aspect, when the safety member is in use, the safety member can be stood upright to function as a support rod, and when not in use, the safety member can be laid down and stored under the loading section.

[0013] In each of the above aspects, it is preferable to have a biasing member that biases the safety member toward the standing posture side.

[0014] According to this aspect, the safety member can be brought into the standing position with a light force.

[0015] In each of the above aspects, it is desirable that the tilting means is a cylinder, that a reinforcing portion be provided on the front surface of the loading portion which is connected to the reinforcing member, and that a cylinder engaging portion with which the cylinder engages be attached to the reinforcing portion.

[0016] The loading vehicle of this embodiment is structured so that the loading section is raised by a cylinder. The loading section needs to be provided with a cylinder engaging section for engaging with the cylinder. Since the cylinder engaging section is a portion where the load is concentrated, it needs to have a considerable rigidity. In the loading vehicle of this embodiment, the reinforcing member that secures the engaging member (member that the holding member engages with) is also used to reinforce the cylinder engaging portion. That is, in the loading vehicle of this embodiment, there is a reinforcing portion on the front surface of the loading portion that reinforces the vicinity of the cylinder engaging portion. The reinforcing portion that reinforces the vicinity of the cylinder engaging portion is connected to the reinforcing member that secures the engaging member (member that the holding member engages with), and as a result, the reinforcing member that secures the engaging member (member that the holding member engages with) is utilized to reinforce the cylinder engaging portion. In the loading vehicle of this embodiment, an engaging member that abuts the other end side of the safety member is attached to a reinforcing portion that reinforces the cylinder engaging portion, and the rigidity of the engaging member can be ensured by utilizing the reinforcing member of the cylinder engaging portion.

[0017] In each of the above aspects, it is desirable to have an auxiliary member that maintains the attitude of the safety member at a predetermined angle.

[0018] According to this aspect, the attitude of the safety member is maintained at a predetermined angle by the auxiliary member, so that the safety member is less likely to come off, and safety is high. Effect of the Invention

[0019] The cargo handling vehicle of the present invention has the advantage that the materials and structures required for reinforcement can be reduced by utilizing the engagement member of the lift-up prevention mechanism as the abutment member against which the safety member abuts. [Brief description of the drawings]

[0020] [Figure 1] 1A and 1B are front views of a dump truck according to an embodiment of the present invention, in which FIG. 1A shows a state in which a cargo box is in a horizontal position, and FIG. 1B shows a state in which the cargo box is in an inclined position. [Diagram 2] FIG. 2 is a perspective view showing a main part of the dump truck of FIG. [Diagram 3] FIG. 1(b) is an enlarged view of the circled area A in FIG. [Figure 4] This is an enlarged view of the area B in the ellipse in FIG. [Diagram 5] 1A and 1B show an example of an engaging member, in which FIG. 1A is a perspective view thereof and FIG. [Figure 6] 1A and 1B are explanatory diagrams illustrating how to use the safety member, where (a) shows the safety member in a stored state, and (b) shows the safety member in an upright position with the receiving member engaged with the pin of the engaging member. [Figure 7] 10A and 10B show another example of an engaging member, in which FIG. 10A is an exploded perspective view thereof, and FIG. [Figure 8] 11A and 11B are front views showing a portion of a dump truck according to another embodiment of the present invention, in which (a) shows a state in which the cargo box is slightly raised, and (b) shows a state in which the cargo box is inclined and a safety member is abutted against the cargo box. [Figure 9]5A and 5B are front views showing a part of a dump truck according to another embodiment of the present invention, in which (a) shows a state in which a safety member is in a lying position, and (b) shows a state in which the safety member is in an upright position. [Figure 10] FIG. 11 is a configuration diagram of a main part of a dump truck according to another embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0021] Hereinafter, an embodiment of the present invention will be described. The loading vehicle of this embodiment is a dump truck 1, which has a cargo box 11 mounted on a vehicle body 2, and which can tilt the cargo box (loading section) 11 with a tilting means 12. The specific structure of the dump truck 1 is a structure in which a special equipment device 3 is mounted on the vehicle body 2. The special equipment device 3 has a member that functionally belongs to the vehicle side 8, and the cargo box 11 that tilts relative to the vehicle side 8. The vehicle side 8 is the vehicle body 2 and a part that is fixed integrally to the vehicle body 2 and cannot change its position. The vehicle body 2 has a cabin section 5 and a base section 6, similar to known vehicle bodies, and has running wheels 7 which rotate to enable self-propelling. In the following description, the front-rear relationship corresponds to the front-rear relationship of the vehicle, with the cabin section 5 side being the front.

[0022] Next, the special equipment 3 will be described. As shown in FIGS. 1 and 2, the special equipment 3 has a subframe 10, a cargo box (loading portion) 11, a tilting means 12, a lift-up prevention mechanism 13, a safety member 20, and a biasing member 21. The subframe 10 functions as a fixed portion that is fixed to the frame portion 6 of the vehicle body 2, and is a frame made of steel. The subframe 10 is a member of the vehicle portion side 8. The cargo box 11 is similar to that of a known dump truck, being a box with an open top, and having an openable / closable tailgate 22 at its rear end. The rear end of the cargo box 11 is supported at the rear end of the subframe 10 via a hinge portion 23 so as to be able to swing.

[0023] The tilting means 12 uses a hydraulic cylinder 22 as power to change the position of the cargo box 11. The tip of the cylinder rod 15 of the hydraulic cylinder 22 is supported by the subframe 10 via a hinge 25. In addition, a cylinder engaging portion 26 is provided on the front side of the cargo box 11, and the rod side of the hydraulic cylinder 22 is attached to the cylinder engaging portion 26 so as to be able to swing.

[0024] The lift-up prevention mechanism 13 is made up of a locking device 30, a reinforcing plate (reinforcing member) 27, and an engaging member 31, as shown in an enlarged view of FIG. The locking device 30 is made up of a holding member 33 that holds a pin 46 of the engagement member 31 , a front support member 42 , a rear support member 43 , and a click mechanism 36 that changes the attitude of the holding member 33 . The holding member 33 is a generally U-shaped member with an opening 37 at one end and a closed rear end with an internal holding space 40. The holding member 33 has an intermediate portion supported by a front support member 42 so as to be able to swing.

[0025] The click mechanism 36 is composed of a compression member 45. The compression member 45 is a compression spring, compressed rubber, or the like, and is capable of generating a repulsive force. The rear end of the compression member 45 is attached to the rear support member 43 of the frame 35, and the front end of the compression member 45 is attached to the rear end portion of the holding member 33. The compression member 45 is in a compressed state and presses the rear end portion of the holding member 33 in a direction away from the rear support member 43 of the frame 35 . The holding member 33 can be positioned by the click mechanism 36 in a downward position in which the opening 37 faces downward as shown in FIG. 3, or in an upward position in which the opening 37 faces upward as shown in FIG. 4, and will not remain in an intermediate position.

[0026] The engaging member 31 has a structure as shown in Fig. 5, and has a pin 46 arranged in the horizontal direction. That is, the engaging member 31 has a pair of brackets 48, 48 arranged facing each other upright on a base plate 47, and the pin 46 is provided between the brackets 48, 48.

[0027] The reinforcing plate (reinforcing member) 27 reinforces the bottom surface of the packing box 11. In this embodiment, a reinforcing plate 27 is provided at the bottom of the packing box 11 at a location where the engaging member 31 is attached, as shown in Fig. 5. The engaging member 31 is attached to the bottom of the packing box 11 via the reinforcing plate 27. That is, the engaging member 31 has a base plate 47 joined to the reinforcing plate 27 on the bottom of the packing box 11 by welding or the like. The pin 46 is located below and away from the bottom of the packing box 11, and is arranged horizontally in the width direction of the vehicle body 2.

[0028] The locking device 30 is attached to the subframe 10. The locking device 30 is located toward the front end of the subframe 10. The engaging member 31 is located on the bottom surface of the packing box 11, toward the front end in the longitudinal direction.

[0029] In the lift-up prevention mechanism 13, when the container 11 is in a horizontal position, the holding member 33 of the locking device 30 holds the pin 46 of the engagement member 31. Here, the holding member 33 is in a downward position as shown in Figure 3, preventing the pin 46 from rising and preventing the container 11 from lifting up. When the container 11 rises, the position of the holding member 33 changes to an upward position as shown in FIG. That is, when the holding member 33 is in a downward position, it is biased clockwise around the pivot shaft 58 by the compression member 45. Therefore, when the container 11 bounces due to vibration during travel and the holding member 33 moves upward, it is returned to the downward position by the compression member 45. Therefore, when the container (loading section) 11 is brought into a substantially horizontal position, the holding member 33 engages with the pin 46 of the engagement member 31, preventing the container 11 from floating up.

[0030] On the other hand, when the hydraulic cylinder 22 is extended to forcibly lift the packing box 11 as shown in Fig. 1(b), the holding member 33 faces upward against the compressive force of the compression member 45, and the engagement member 31 rises. The holding member 33 is forcibly rotated clockwise around the rotation shaft 58, and the compression member 45 contracts. That is, when the axis of the compression member 45 passes through the center of the rotation shaft 58, the compression member 45 rebounds all at once and rotates clockwise around the rotation shaft 58. As a result, the holding member 33 changes to an upward position as shown in Fig. 4, and the opening 37 of the holding member 33 opens upward, allowing the pin 46 to be removed.

[0031] When the packing box 11 is in an inclined position, the holding member 33 maintains an upward position as shown in FIG. 4, and the opening 37 opens upward. Therefore, when the packing box 11 returns from the inclined position to a horizontal position, the pin 46 enters the opening 37 of the holding member 33, forcibly moving the holding member 33 downward. As a result, the holding member 33 descends against the compressive force of the compression member 45. The compression member 45 is forcibly rotated counterclockwise around the pivot shaft 58, and the compression member 45 contracts. Then, when the axis of the compression member 45 passes through the center of the pivot shaft 58, the compression member 45 rebounds all at once and rotates counterclockwise around the pivot shaft 58. As a result, the holding member 33 changes to a downward position, and the opening 37 of the holding member 33 opens downward, preventing the pin 46 from coming off.

[0032] Next, the safety member 20 will be described. The safety member 20 functions as a support rod. The safety member 20 is a ladder-shaped member as shown in FIG. 2, and has two pillar members 50, and a crosspiece member 51 is provided between the pillar members 50. 2 and 6, a receiving member 52 is provided on a crosspiece member 51 at the upper end of the safety member 20. The receiving member 52 is a valley-shaped or "U"-shaped member with an opening 53 at one end and a closed inner side having a holding space 55 inside. The receiving member 52 is located in the center of the crosspiece member 51 at the upper end, and opens outward.

[0033] As shown in FIG. 2, a horizontal bar portion 56 projects from one of the pillar members 50, and the tip of the horizontal bar portion 56 serves as a handle 57. The biasing member 21 is a known gas damper. That is, as shown in Fig. 6, the biasing member 21 is a cylinder, and has a cylinder body 66 and a piston rod 67. A spring and gas are sealed inside the cylinder body 66, and the piston rod 67 is biased in the protruding direction.

[0034] The base end side of the safety member 20 is attached to the subframe 10 so as to be able to swing, as shown in FIG. A biasing member 21 is provided between the horizontal bar portion 56 of the safety member 20 and the subframe 10.

[0035] The safety member 20 and the biasing member 21 are rotatably attached to the subframe 10, and can take a standing position as shown in FIG. 6(b) and a lying position as shown in FIG. 6(a). When the safety member 20 is in the lying position, the safety member 20 is aligned along the subframes 10 and is housed between the subframes 10. In addition, as shown in Figure 2, the locking device 30 is housed in a rectangular space surrounded by the pillar members 50 and the crosspiece members 51.

[0036] The dump truck 1 has a special equipment 3 mounted on a vehicle body 2, and a subframe 10 is integrally fixed to the vehicle body 2 by a jig or the like (not shown). Looking generally at the dump truck 1, the subframe 10 is a member on the vehicle side 8, and the locking device 30 is attached to the vehicle side 8 of the dump truck 1. In addition, the tip of the cylinder rod 15 of the hydraulic cylinder 22, the base of the safety member 20, and the base of the urging member 21 are swingably attached to the vehicle side 8 of the dump truck 1. That is, one end of the safety member 20 is supported on the vehicle side 8 so as to be swingable. The engaging member 31 is attached to the bottom surface of the packing box 11. In addition, the rod side of the hydraulic cylinder 22 is attached to the packing box 11 so as to be able to swing.

[0037] Next, the function of the safety member 20 will be described. For example, when inspecting underneath the cargo box 11, the hydraulic cylinder 22 is driven to raise the front end of the cargo box 11 as shown in FIG. 1(b), and the cargo box 11 is tilted to create a gap between the cargo box 11 and the vehicle side 8. 1(b) and 6(b), the free end side of the safety member 20 is lifted to bring the safety member 20 into a standing position. In this operation, the worker holds the handle 57 with his / her hand and lifts the safety member 20. Here, the safety member 20 has a considerable weight, but since the safety member 20 is biased by the biasing member 21 so as to take the standing position, the safety member 20 can be stood upright with a light force. 1(b) and 6(b), the receiving member 52 of the safety member 20 is engaged with the pin 46 of the engaging member 31 attached to the packing box 11. As a result, one end of the safety member 20 comes into contact with the vehicle side 8, and the other end of the safety member 20 is supported by the reinforcing plate 27 via the engaging member 31. Therefore, the safety member 20 functions as a brace and prevents the packing box 11 from descending. In other words, one end of the safety member 20 is supported by the reinforcing plate 27 via the engaging member 31, and the other end is supported by the vehicle side 8, so that even if a compressive load is applied from the packing box 11, the safety member 20 is able to resist this.

[0038] In the dump truck 1 of this embodiment, the other end side of the safety member 20 is in a state of being engaged with the engaging member 31 as described above, and therefore the safety member 20 is in contact with the engaging member 31 . Here, the engaging member 31 originally constitutes the anti-floating mechanism 13, and engages with the retaining member 33 of the locking device 30 to prevent the packing box 11 from floating up. Therefore, the engaging member 31 is configured to be able to bear a considerable load. That is, the engaging member 31 is attached to a portion reinforced with a large reinforcing plate (reinforcing member) 27. Therefore, even if the container 11 bounces during travel and a large load is applied to the engaging member 31, the load is dispersed by the large-area reinforcing plate 27, and the stress applied to the container 11 is small. In this way, the engaging member 31 provided to prevent the box 11 from floating up and the mounting portion of the box 11 are sufficiently reinforced by the reinforcing plate 27 and can withstand a large load.

[0039] In the dump truck 1 of this embodiment, the safety member 20 is abutted against the engaging member 31 of the anti-floating mechanism 13 so as to be supported by the engaging member 31, and the mounting portion of the engaging member 31 and the cargo box 11 has sufficient rigidity to withstand the weight of the cargo box 11. In the dump truck 1 of this embodiment, the engaging member 31 of the anti-lifting mechanism 13 is also used, not only as an engaging member for the holding member 33 but also as a contact member against which the safety member 20 contacts. Therefore, the dump truck 1 of this embodiment requires fewer parts and less steel.

[0040] In the embodiment described above, the engaging member 31 is attached to a portion reinforced by the planar reinforcing plate 27, but the reinforcing member that reinforces the shipping box 11 may be three-dimensional. The engagement member 31 shown in FIG. 7 has a frame-shaped base portion (reinforcing member) 61, and a pair of brackets 48, 48 are attached to the base portion 61 via a base plate 47. According to this aspect, the load can be distributed more widely.

[0041] In addition, the reinforcing member that reinforces the shipping box 11 may be called a stiffener and have an "I" shaped cross-sectional shape, or may be made of steel material with a "C" shaped cross-sectional shape, or steel material with an "H" shaped cross-sectional shape.

[0042] In the embodiment shown in FIG. 8, the engagement member 31 of the lift-up prevention mechanism 13 is integrated with the cylinder engagement portion 26 to ensure rigidity. That is, the cylinder engaging portion 26 is the portion that connects the hydraulic cylinder 22 that raises and lowers the packing box 11 to the packing box 11, and is the portion that is most heavily loaded. Therefore, the portion of the packing box 11 where the cylinder engaging portion 26 is attached is heavily reinforced. In this embodiment, the reinforcing portion of the cylinder engaging portion 26 of the packing box 11 is connected not only to the front wall 65 of the packing box 11 but also to a reinforcing plate (reinforcing member) 27 at the bottom of the packing box 11. In this embodiment as well, an engaging member 31 is attached to the reinforcing plate (reinforcing member) 27, and the retaining member 33 of the locking device 30 engages with the engaging member 31 when the packing box 11 is in a horizontal position.

[0043] In other words, in this embodiment, the engagement member 31 is attached to the reinforcing portion 63 of the cylinder engagement portion 26 at the bottom of the packing box 11. That is, the reinforcing portion 63 of the cylinder engagement portion 26 is integrated with the reinforcing plate (reinforcing member) 27 and is "L" shaped. That is, the reinforcing portion 63 of the cylinder engagement portion 26 has a front wall reinforcing portion 76 that contacts the front wall 65 of the packing box 11 and a bottom reinforcing portion (reinforcing plate 27) 77 that reinforces the bottom of the packing box 11, and the two are integrated together. According to this embodiment, the reinforcing structure of the cylinder engaging portion 26 is used not only to reinforce the cylinder engaging portion 26 but also to reinforce the engaging member for the holding member 33. Therefore, the dump truck 1 of this embodiment requires a small number of parts and a small amount of required steel.

[0044] The loading vehicle of this embodiment has a front wall reinforcement portion 76 connected to a reinforcing plate (reinforcing member) 27 on the front side of the loading box 11, which serves as the loading section, and a cylinder engagement portion 26 with which the hydraulic cylinder 22 engages is attached to the front wall reinforcement portion 76.

[0045] The front wall reinforcement part 76 that contacts the front wall 65 of the packing box 11 and the bottom reinforcement part (reinforcing plate 27) 77 that reinforces the bottom of the packing box 11 may be made of a single "L" shaped member, with the reinforcement plate (reinforcing member) 27 and the front wall reinforcement part 76 being connected together. Also, the plate material that constitutes the front wall reinforcement part 6 and the bottom reinforcement part (reinforcing plate 27) 77 may be joined by welding or the like, with the reinforcement plate (reinforcing member) 27 and the front wall reinforcement part 76 being connected together.

[0046] The embodiment shown in FIG. 9 has an auxiliary member 70 that maintains the attitude of the safety member 20 at a predetermined angle. The auxiliary member 70 is composed of a guide member 71 and a support member 72. The guide member 71 is a belt-shaped member and is provided with a guide hole 73. The guide hole 73 is an elongated hole that extends horizontally and is provided with a downwardly bent locking portion 75 at the end. One end of the support member 72 is engaged with the guide hole 73 via a slider 80. The other end of the support member 72 is connected to the safety member 20 so as to be able to swing.

[0047] When the safety member 20 is in the lying position, the slider 80 is located at the right end of the guide hole 73. When the safety member 20 is in the standing position, the slider 80 moves to the left end of the guide hole 73 and engages with the locking portion 75. Therefore, the slider 80 is prevented from moving to the right by the locking portion 75, and even if the safety member 20 is subjected to an external force, the slider 80 does not move, and the safety member 20 maintains the standing position.

[0048] In the embodiment described above, the front end side of the safety member 20 is supported by the vehicle part side 8 and the rear end side is a free end, based on the state when the safety member 20 is in the lying position. In the embodiment described above, the rear side of the safety member 20 is raised to change to the standing position. However, the present invention is not limited to this configuration, and the rear end side of the safety member 20 may be supported on the vehicle part side 8, and the front end side may be a free end. According to this configuration, the front side of the safety member 20 is raised and changed to a standing position.

[0049] In the dump truck described above, the rear end of the cargo box 11 serves as a pivot axis so that the front of the cargo box rises and the cargo is discharged from the rear of the cargo box. In contrast, there is a special vehicle called a horizontal dump truck, which uses the longitudinal side of the cargo box as a swing axis and lifts the other side to dump the cargo onto the side of the vehicle. The present invention can also be applied to a lateral dump truck. When the present invention is applied to a lateral dump truck, the safety member is placed horizontally. That is, the longitudinal direction of the safety member is arranged along the width direction of the vehicle.

[0050] The safety member 20 employed in the above embodiment is ladder-shaped, but may be rod-shaped or tower-shaped. The base end side of the safety member 20 employed in the above embodiment is swingably attached to the subframe 10 and cannot be removed, but the safety member may be removed and stored in another position.

[0051] In the embodiment described above, the lift-up prevention mechanism 13 is attached to the front side of the subframe 10 of the dump truck 1, and the safety member 20 holds the cargo box 11 in a position near the front end. This configuration has the advantage that the load applied to the safety member 20 and the lift-up prevention mechanism 13 is small. However, the position where the lift-up prevention mechanism 13 and the safety member 20 hold the cargo box 11 is not limited to the front end side, and may be in the middle or a position near the rear end. By providing the anti-floating mechanism 13 and the like in the middle portion or near the rear end, the overall length of the safety member 20 can be shortened.

[0052] In the dump truck 1 described above, the free end side of the safety member 20 is engaged with the engaging member 31 of the lift-off prevention mechanism 13, but the member that abuts (supports) the safety member 20 is not limited to the engaging member 31 of the lift-off prevention mechanism 13, and may be any portion reinforced by the reinforcing plate (reinforcing member) 27. For example, an engaging member separate from the engaging member 31 of the lift-off prevention mechanism 13 may be provided on the reinforcing plate (reinforcing member) 27, and the safety member 20 may be engaged with that engaging member.

[0053] In the embodiment described above, the safety member 20 is attached so as to be able to swing to the subframe 10. That is, in the embodiment described above, the safety member 20 is attached to the vehicle portion side 8 so as to be able to swing. However, the present invention is not limited to this configuration, and the safety member 20 may be attached to the cargo box (cargo section) 11. That is, as shown in Fig. 10, the safety member 20 may be swingably attached (supported) to a reinforcing plate 27 attached to the cargo box 11, and the free end side may be supported by the vehicle section 8.

[0054] The anti-floating mechanism employed in the embodiment described above employs a click mechanism 36 and can assume two positions: an upward position in which the opening 37 of the holding member 33 faces upward, and a downward position in which the opening 37 faces downward. However, it may also be possible to use the power of a hydraulic cylinder or the like to engage and disengage with the engaging member 31.

[0055] In the embodiment described above, since the biasing member 21 is attached to the safety member 20, the safety member 20 can be raised with a light force. In the above embodiment, a gas damper is disclosed as the biasing member 21, but the gas damper is merely one example of the biasing member 21, and the biasing member 21 is not limited to a gas damper. For example, a spring can also be used as the biasing member. Moreover, the biasing member 21 is not essential, and the biasing member 21 may be omitted.

[0056] In the above embodiment, the dump truck 1 has been described as an example of a cargo handling vehicle, but the present invention can be widely applied to cargo handling vehicles having a function of tilting the loading section. For example, the present invention can be applied to a garbage collection vehicle, a container transport vehicle, and a vehicle transport vehicle. [Explanation of symbols]

[0057] 1. Dump truck (cargo handling vehicle) 2 Vehicle body 3 Special equipment 8 Vehicle side 11 Cargo box (loading area) 12 Tilting means 13 Anti-floating mechanism 20 Safety Components 21 Pressing member 22 Hydraulic cylinder 26 Cylinder engagement part 27 Reinforcing plate (reinforcing member) 30 Locking device 31 Engagement member 33 Retaining member 46 pin 50 Columnar member 51 Crosspieces 52 Supporting member 57 Handle 61 Foundation (reinforcement member) 63 Reinforcement 70 Auxiliary Materials

Claims

1. A loading vehicle having a vehicle section, a loading section, and a tilting means for tilting the loading section, the loading section being capable of changing its position between a substantially horizontal position and an inclined position, and a lift-up prevention mechanism for preventing the loading section from lifting up, the lift-up prevention mechanism having a reinforcing member provided on the loading section side, an engaging member fixed to the reinforcing member, and a retaining member provided on the vehicle section side, the retaining member engaging with the engaging member when the loading section is in a substantially horizontal position, thereby preventing the loading section from lifting up, A loading vehicle characterized in that it has a safety member that prevents the loading section from returning to an approximately horizontal position when the loading section is in an inclined position, one end side of the safety member being supported on the vehicle section side, and the other end side of the safety member being supported directly or indirectly by the reinforcing member.

2. 2. The cargo handling vehicle according to claim 1, wherein the other end side of the safety member is capable of abutting against the engagement member.

3. 3. The cargo handling vehicle according to claim 1, wherein one end of the safety member is attached to the vehicle portion so as to be capable of swinging.

4. 3. The cargo handling vehicle according to claim 1, further comprising a biasing member for biasing the safety member toward the upright position.

5. 3. A loading vehicle as described in claim 1 or 2, characterized in that the tilting means is a cylinder, and a reinforcing portion connected to the reinforcing member is provided on the front surface of the loading portion, and a cylinder engaging portion with which the cylinder engages is attached to the reinforcing portion.

6. 3. A cargo handling vehicle according to claim 1, further comprising an auxiliary member for maintaining the attitude of the safety member at a predetermined angle.

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