JP3909958B2 - Container bouncing prevention device for container transport vehicles - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a container splash prevention device for preventing a container from jumping on a chassis in a container transport vehicle in which a container is mounted on the chassis.
[0002]
[Prior art]
Generally, in a container transport vehicle in which a container is mounted on a chassis, the container is lifted by a crane attached to a container loading / unloading site and mounted on the chassis, or the container is loaded by a cargo handling device installed on the chassis. Is mounted on the chassis.
[0003]
Some of these container transport vehicles include a container jump prevention device that prevents the containers mounted on the chassis from jumping up. For example, as disclosed in Japanese Utility Model Publication No. 58-85735, the container splash prevention device includes a hook member that is detachably engaged with a container on a chassis, and the tip (upper end) of a cylinder rod is the hook. And a hydraulic cylinder connected to the member via a pin. The hook member is rotatably coupled around a rotation center axis extending in the longitudinal direction of the vehicle body, and the tip thereof is engaged with a pair of left and right main girder having a substantially I-shaped cross section extending in the longitudinal direction on the left and right sides of the lower surface of the container. It comes to match. Further, the hydraulic cylinder is provided so as to be able to extend and contract in the vertical direction, and the hook member is rotated in a specific rotation direction around the rotation center axis in accordance with the upward extension operation, so that the hook member becomes a main girder of the container. The hook member is engaged with the main girder of the container by rotating the hook member around the rotation center axis in the direction opposite to the specific rotation direction in accordance with the engagement state to be engaged with each other and the downward contraction operation. It is comprised so that it may mutually convert into the engagement cancellation | release state to cancel | release.
[0004]
[Problems to be solved by the invention]
By the way, in particular, in a container transport vehicle having a cargo handling device such as an L-shaped arm, the container on the chassis is held at its front end position, so that a relatively large jump occurs during traveling at the rear end position of the container. The jumping vibration tends to cause inconveniences such as a tail lamp and other broken pieces. For this reason, in such a container transport vehicle, it is necessary to reliably prevent the container from jumping up.
[0005]
On the other hand, in the conventional container splash prevention device, the container splash direction and the expansion / contraction operation direction of the hydraulic cylinder are respectively in the vertical direction and coincide with each other. Since the hook member and the piston rod of the hydraulic cylinder are connected via a pin, the impact load in the vertical direction when the container jumps up is directly transmitted to the expansion / contraction operation direction of the hydraulic cylinder via the hook member. become. For this reason, when an impact load is applied to the hydraulic cylinder when the container jumps up from its operating direction (extension / contraction operating direction), an unreasonable load is applied to the hydraulic cylinder. When the impact load acts on the piston rod in the axial direction (extension / retraction operation direction), the hydraulic pressure is forced to fluctuate, causing the hydraulic cylinder to be remarkably deteriorated and the hook member to the container. There is a possibility that it cannot be reliably restrained to the engaged state. In addition, it may cause a failure of the hydraulic cylinder. Such a situation occurs not only in the hydraulic cylinder but also in other actuators used for operating the hook member in the same manner as described above.
[0006]
The present invention has been made in view of such a point, and an object of the present invention is to make it possible to interrupt an impact load when a container jumps up from an operation direction of an actuator such as a hydraulic cylinder. An object of the present invention is to eliminate the cause of failure of an actuator such as a cylinder to improve durability and to ensure that a hook member can be reliably restrained in an engaged state with respect to a container.
[0007]
[Means for Solving the Problems]
In order to achieve the above-mentioned object, the present invention has a basic specific matter of blocking the impact load from the operating direction of the actuator.
[0008]
Specifically, the solution provided by the invention according to claim 1 is based on a container bouncing prevention device for a container transport vehicle that prevents the container mounted on the chassis from bouncing up. A hook member that is rotatably connected around a rotation center axis extending in the longitudinal direction of the vehicle body and engages with the container by rotation in a specific rotation direction around the rotation center axis, and the hook member are not mutually connected. An actuating member that is connected to each other to convert the hook member into an engaged state engaged with the container and an engaged disengaged state released from the container by moving forward and backward; and the actuating member And an actuator for moving the actuator forward and backward. An operating surface that slidably contacts the hook member by the forward movement of the operating member and presses the hook member to rotate in the specific rotation direction, and is held at a predetermined forward position with respect to the hook member. And a restraining surface that restrains the hook member in the engaged state by making surface contact with each other in a direction orthogonal to the advancing / retreating movement direction of the operating member. In addition, around the hook member, the first end face that is slidably contacted with the operating surface and receiving the pressing force in the specific rotation direction, and the constraining surface are in surface contact with each other to prevent rotation about the rotation center axis. A second end face constrained by the state. Furthermore, from the position of the center of gravity of the hook member so that a rotation moment that rotates the rotation center axis of the hook member in a direction opposite to the specific rotation direction is applied to the hook member in the engaged state based on its own weight. It is set as the structure arrange | positioned so that it may be located in the position eccentric in the vehicle width direction.
[0009]
In the case of claim 1, in order to disengage the hook member in the engaged state, the operating member is moved backward by the actuator. Then, the rotation restraint by mutual surface contact between the restraining surface of the operating member and the second end surface of the hook member is released. Then, the hook member is automatically rotated in the reverse rotation direction around the rotation center axis by its own weight in accordance with the backward movement of the operation member, and is converted into the disengaged state, and is engaged with the container mounted on the chassis. Will be released.
[0010]
On the other hand, in order to engage the hook member with the container, the operating member is moved forward by the actuator. Then, the operating surface of the operating member and the first end surface of the hook member are in sliding contact with each other, whereby the hook member rotates and engages in a specific rotation direction around the rotation center axis as the operating member moves forward. It is converted into a state and engaged with a container mounted on the chassis. If the forward movement is stopped at the predetermined forward position, the restraining surface of the operating member comes into surface contact with the second end surface of the hook member, and the hook member rotates about the rotation center axis by this surface contact. Will be blocked and restrained to the engaged state.
[0011]
When the hook member is thus engaged and in the engaged state, the surface contact is a surface contact in a direction perpendicular to the advancing and retreating movement direction of the operating member with respect to the second end surface of the hook member. Even if the impact load from the vertical direction when the container jumps up is transmitted to the hook member, the transmitted impact load acts on the restraining surface of the operating member from the surface contact direction of the second end surface of the hook member. The actuator is not transmitted directly in the forward / backward movement direction of the actuator, and an excessive load is not applied to the actuator. In this case, even if a hydraulic cylinder is used as an actuator, it is possible to improve the durability of the hydraulic cylinder without causing a forced change in the hydraulic pressure due to an impact load, and to secure the hook member to the container. It is possible to be restrained in the engaged state. In addition, the cause of failure of the hydraulic cylinder is eliminated. The same applies to other actuators as well as hydraulic cylinders.
[0012]
Moreover, when the hook member is in the engaged state, the restraining surface of the actuating member is in surface contact with the second end surface of the hook member in a direction perpendicular to the advancing / retreating movement direction of the actuating member, so that the hook member is restrained. The amount of forward movement of the actuating member to the predetermined advance position is more than that if a minimum amount is secured so that the restraining surfaces of the actuating member can come into surface contact with the second end surface of the hook member. May be. Thereby, when restraining the hook member in the engaged state, it is not necessary to strictly set the forward movement amount of the operating member, and the accuracy of the operating member and the actuator can be lowered to reduce the cost. .
[0013]
Furthermore, since the hook member rotates in the reverse rotation direction based on its own weight simply by positioning the rotation center axis of the hook member at a position deviated from the center of gravity of the hook member in the vehicle width direction, the hook member is rotated in the reverse rotation direction. In the above, it is not necessary to separately provide a rotation urging means or the like, and the number of parts is reduced.
[0014]
The solution provided by the invention according to claim 2 specifically specifies the configuration of the actuating member and the hook member in the invention according to claim 1.
[0015]
That is, the actuating member is provided so as to move forward and backward in the vertical direction, and the actuating member is moved upward when moving forward.
[0016]
In the case of claim 2, the impact load when the container jumps up, the second end surface of the hook member comes into surface contact with the restraining surface of the operating member, even though the operating member moves forward and backward in the same vertical direction as the direction of action. It acts from the vertical direction and is smoothly absorbed by the sliding contact in the vertical direction at each surface contact portion. For this reason, the transmission of the impact load when the container jumps up is blocked at the surface contact portion, and is reliably prevented from being transmitted in the direction of operation of the actuator via the operating member, and an unreasonable load may act on the actuator. Can be reliably eliminated.
[0017]
The solution provided by the invention according to claim 3 specifically specifies the configuration of the actuating member in the invention according to claim 1 or claim 2.
[0018]
That is, the orthogonal line orthogonal to the tangent line of the operating surface of the operating member that slidably contacts the hook member and the operating member with respect to the first end surface of the hook member is at a position that passes the center of gravity position side of the rotation center axis of the hook member. It is set as the structure arrange | positioned so that it may be positioned.
[0019]
In the case of claim 3, when the hook member is rotated in the specific rotation direction, the operation surface of the operation member is slidably contacted with the first end surface of the hook member from any direction such as a left-right direction (vehicle width direction) or an oblique direction. This may increase the degree of freedom in the layout of the hook member and the actuating member.
[0020]
The solution provided by the invention according to claim 4 more specifically specifies the configuration of the hook member and the actuating member in the invention according to claim 3.
[0021]
That is, the constraining surface of the operating member and the second end surface of the hook member are configured to extend vertically in parallel to each other toward the advancing direction of the operating member when the hook member is in the engaged state. is there.
[0022]
In the case of claim 4, the constraining surface of the operating member and the second end surface of the hook member are in surface contact continuously over the advancing direction of the operating member when the hook member is in the engaged state. For this reason, even if the impact load when the container jumps up acts from the direction orthogonal to the advancing / retreating direction of the operating member with respect to the restraining surface, the impact load is sufficiently supported by the restraining surface extending in a straight line in the advancing / retreating direction of the actuating member. In addition, it is possible to cut off the transmission of the impact load to the actuator. Therefore, the durability of the actuator can be further improved, and the hook member can be more reliably restrained from being engaged with the container.
[0023]
The solution provided by the invention according to claim 5 more specifically specifies the configuration of the hook member in any one of claims 1 to 4.
[0024]
That is, the first end surface of the hook member is used as the operating surface of the operating member so that the rotation of the first end surface of the hook member around the rotation axis due to its own weight is restricted when the hook member is in the disengaged state. It is set as the structure made to contact | abut.
[0025]
In the case of the fifth aspect, the operating member is moved forward by the actuator, and at the same time, the hook member is rotated in the specific rotation direction around the rotation center axis, and the hook member is quickly converted into the engaged state. In addition, when the hook member is in the disengaged state, it is not necessary to prepare a separate stopper for restricting the rotation in the reverse rotation direction due to the weight of the hook member, and the number of parts can be reduced by using the operating member. It will be.
[0026]
The solution provided by the invention according to claim 6 specifically specifies the configuration of the actuator in the invention according to claim 1.
[0027]
That is, an electric motor that moves the operating member back and forth with a rotational force is applied as the actuator.
[0028]
In the case of claim 6, there is no possibility that the operation of converting the engaged state of the hook member from the engaged state to the disengaged state due to the oil leakage over time that occurs when an actuator such as a hydraulic cylinder is used. It will be restrained by an engagement state.
[0029]
Moreover, it is only necessary to connect a flexible cord to supply electric power to the electric motor, and there is no need to worry about the layout of thick and inflexible hydraulic piping as in the case of using a hydraulic cylinder as an actuator. As a result, a code that can be thinly changed can be laid out smoothly.
[0030]
The solution provided by the invention according to claim 7 specifies the engagement position of the hook member with respect to the container in the invention according to claim 1.
[0031]
Specifically, a container mounted on a chassis equipped with a cargo handling device having an L-shaped arm is held by the L-shaped arm at the front end position, and the hook member is engaged with the rear end position of the container. It is set as the structure to install.
[0032]
In the case of the seventh aspect, the container is held by the L-shaped arm at the front end position and is engaged by the hook member at the rear end position, so that the container is effectively prevented from jumping up. In addition, the impact load amplified at the container rear end position when the container jumps up is effectively suppressed by the hook member.
[0033]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0034]
1 to 4 show a container transport vehicle provided with a container splash prevention device according to an embodiment of the present invention. In FIG. 2, 1 is a container transport vehicle, 2 is a pair of left and right as a chassis of the container transport vehicle 1 It is a container mounted on the body frames 11, 11 (shown in FIG. 1). In FIG. 1, reference numeral 3 denotes a cargo handling device for loading and unloading the container 2 to and from the vehicle body frames 11, 11. The cargo handling device 3 is mounted on each vehicle body frame 11.
[0035]
As shown in FIGS. 2 to 4, the vehicle body frames 11 and 11 each extend in the longitudinal direction of the vehicle body, and include a cab 12 on the front end portion thereof. A pair of left and right subchassises 13 and 13 (shown in FIG. 1) are provided on the vehicle body frames 11 and 11 behind the cab 12 so as to extend in the vehicle body longitudinal direction along the vehicle body frames 11. Each sub-chassis 13 is formed in a closed cross-sectional shape (shown in FIG. 5) and has a length capable of mounting a container 2 that is long in the longitudinal direction of the vehicle body. Further, as shown in FIG. 1, each sub-chassis 13 is integrally formed by a front end portion 13F and a rear end portion 13R located at both front and rear ends thereof, and a central portion 13M connecting between the front and rear end portions 13F and 13R. It is configured. The front and rear end portions 13F and 13R are positioned on the inner side in the vehicle width direction with respect to the central portion 13M, respectively, and are viewed from the side of the vehicle body with their own front wrap allowance 13a and rear wrap allowance 13b. Are joined from the inner side in the vehicle width direction in a partially overlapped state. As shown by a solid line in FIG. 2, the container 2 is mounted on each vehicle body frame 11 via each subchassis 13. In addition, a pair of left and right jacks 14 (only one is shown in FIGS. 2 to 4) that can be overhanged are provided at the rear ends of the body frames 11, and are shown by a one-dot chain line in FIGS. 2 and 4 and a solid line in FIG. As shown in each, the stability of the container transport vehicle 1 can be improved by projecting each jack 14 against the center of gravity movement toward the rear of the vehicle body when the container 2 is loaded and unloaded by the cargo handling device 3. .
[0036]
As shown in FIGS. 1 and 2, the container 2 has a substantially rectangular upper wall 2a and a bottom wall 2b that are long in the longitudinal direction of the vehicle body at both upper and lower positions, and the periphery of the upper wall 2a and the bottom wall 2b. Is enclosed by the front and rear walls 2c, 2d and the left and right side walls 2e, 2f.
[0037]
On the lower surface of the bottom wall 2b of the container 2, a pair of left and right main girders 21 and 21 (shown in FIG. 1) extending in the longitudinal direction of the vehicle body are integrally provided. Each main girder 21 is formed in a substantially I-shaped cross section (appears only in the lower part in FIG. 5). Further, as shown in FIG. 1, an engaging pin 22 is provided at the upper center position of the front wall 2c of the container 2 so that a hook portion 34d described later is detachably engaged. Then, as indicated by a one-dot chain line in FIG. 4, the upper end of the rear wall 2d of the container 2 is rearward about the vehicle width direction axis (not shown) at the upper positions of the rear end portions of the left and right side walls 2e, 2f. It is supported so that it can be opened downward. In this case, the rear wall 2d of the container 2 is restricted from being opened rearward when being secured by a rear wall securing device (not shown).
[0038]
As shown in FIG. 1, the cargo handling device 3 has a rear end portion rotatably connected around a first vehicle width direction axis 31 extending in the vehicle width direction with respect to the rear end of each sub chassis 13, and is connected to each sub chassis. A pair of left and right tilt frames 32, 32 provided to be tiltable with respect to 13, and a second vehicle width direction shaft 33 whose base end portion is parallel to the first vehicle width direction shaft 31 with respect to the front end portion of each tilt frame 32. An L-shaped arm 34 that is rotatably coupled around the tilting frame 32, a substantially intermediate left and right side of the L-shaped arm 34, and a front end of each sub-chassis 13. A pair of left and right cargo handling cylinders 35 provided therebetween are provided. Further, a pair of left and right guide rollers 16 and 16 for guiding the container are provided at the rear end of the rear end portion 13R of each sub-chassis 13 so as to be rotatable about the first vehicle width direction axis 31. Yes.
[0039]
The L-shaped arm 34 is connected to the front end portion of the tilting frame 32 so as to be rotatable around the second vehicle width direction axis 33 and extends forward on the front portion of each sub-chassis 13; A base arm portion 34b that is slidably mounted in the front-rear direction with respect to the tip portion of the base arm portion 34a, and a base end is integrally provided at the tip of the base arm portion 34b, and the tip portion of the base arm portion 34b. A protruding arm portion 34c that is bent from the position and extends upward, and is provided at the tip of the protruding arm portion 34c, and engages with an engagement pin 22 provided at the upper end of the front wall 2c of the container 2 so as to be detachable. A substantially C-shaped hook part 34d is connected between the base arm part 34a and the base arm part 34b, and the base arm part 34b and the protruding arm part 34c are connected to the base arm part 34a. By extending and contracting so as to move backward, the base arm portion 34b and the protruding arm portion 34c are mutually positioned at a forward position (a position indicated by a solid line in FIG. 2) and a backward position (a position indicated by a one-dot chain line in FIG. 2). And a telescopic cylinder 34e to be converted. As shown in FIG. 4, the L-shaped arm 34 is held so as to extend substantially linearly with respect to each tilting frame 32 and restricts rotation around the second vehicle width direction axis 33 (see FIG. 4). Not shown). This restricting member is configured to restrict the rotation of the L-shaped arm 34 with respect to each tilting frame 32 or to release the restriction on the rotation according to the expansion / contraction state of the expansion / contraction cylinder 34e. Specifically, the restricting member is provided for each tilting frame 32 when the telescopic cylinder 34e is in an extended state, that is, when the base arm portion 34b and the protruding arm portion 34c are positioned at the forward movement position with respect to the base arm portion 34a. While holding the L-shaped arm 34 in a substantially straight line and restricting rotation about the second vehicle width direction axis 33, when the telescopic cylinder 34e is in a contracted state, that is, with respect to the base arm 34a, the base arm 34b and the protrusion When the arm portion 34c is positioned in the retracted position, the rotation restriction of the L-shaped arm 34 is released with respect to the front end portion of each tilting frame 32 so that the L-shaped arm 34 rotates about the second vehicle width direction axis 33. I have to.
[0040]
In each of the cargo handling cylinders 35, the amount of expansion / contraction operation is set in accordance with the position change of the base arm portion 34b and the protruding arm portion 34c, that is, the presence or absence of the rotation restriction of the L-shaped arm 34 by the restriction member. ing. Specifically, in each cargo handling cylinder 35, when the L-shaped arm 34 is restricted by the restricting member, the container 2 in which the hook portion 34 d is engaged with the engagement pin 22 is placed on the sub chassis 13. Mounted on the vehicle (shown by a solid line in FIG. 4), and the L-shaped arms 34 are held in a substantially straight line with respect to each tilting frame 32 so that each tilting frame 32 is rotated around the first vehicle width direction axis 31. By tilting, the expansion and contraction operation amount is set so that the container 2 is mutually converted into a tilted state (indicated by a one-dot chain line in FIG. 4) inclined backward at a predetermined angle toward the rear. Yes. Further, when the rotation restriction of the L-shaped arm 34 by the restricting member is released, each cargo handling cylinder 35 is attached to the second vehicle width direction shaft 32 and the L-shaped arm 34 with respect to the in-vehicle state and each tilting frame 32. The container 2 is lowered to the ground behind each vehicle body frame 11 by rotating it around the rear so that the hook portion 34d can be engaged with and disengaged from the engagement pin 22 (one point in FIG. 3). The expansion / contraction operation amount is set so as to be mutually converted into a state indicated by a chain line).
[0041]
As shown in FIGS. 5 and 6, the rear end portion 13 </ b> R of each sub-chassis 13 in which each tilting frame 32 is positioned has a base 41 having a substantially U-shaped cross section that opens outward in the vehicle width direction. Is attached. The base 41 is provided with a container jump prevention device 40 that prevents the rear portion of the container 2 from jumping up due to vehicle body vibration or the like on the rear end portion 13R of each sub chassis 13.
[0042]
As shown in FIG. 5, the container splash prevention device 40 has an engaging claw portion 49 engaged with the outer edge of the rear lower end of each main girder 21 of the container 2 mounted on the central portion 13M of each subchassis 13. A pair of left and right substantially C-shaped hook members 43 (only one is shown in the figure) and a wedge member 44 as an operating member that moves forward and backward in the vertical direction extending in the vertical direction (see FIG. 8). And an electric motor 51 as an actuator for moving the wedge member 44 in the vertical direction.
[0043]
The hook member 43 is rotatably connected to the upper end portion of the base 41 around a rotation center shaft 42 extending in the longitudinal direction of the vehicle body, and a positive rotation direction (see FIG. 5) as a specific rotation direction around the rotation center shaft 42. The engagement claw portion 49 is engaged with the outer edge of the rear lower end of each main girder 21 of the container 2 by being rotated in the clockwise direction indicated by the solid arrow A). The engaging claw portion 49 is provided at the upper end of the hook member 43.
[0044]
The wedge member 44 moves back and forth in the vertical direction along the bottom surface (inner side surface in the vehicle width direction) of the base 41, thereby moving the engaging claw portions 49 of the hook members 43 to the rear portions of the main girders 21 of the container 2. An engaged state (state shown by a solid line in FIG. 5) engaged with the outer edge of the lower end and an engaged state released from the outer edge of the rear lower end of each main girder 21 of the container 2 ( (A state indicated by a two-dot chain line in FIG. 5). The wedge member 44 and the hook member 43 are not connected to each other.
[0045]
At the upper position of the outer surface of the wedge member 44 in the vehicle width direction, the wedge member 44 is moved forward with respect to the hook member 43 by the upward movement (movement in the direction of arrow C shown by a solid line in FIG. 5). An operating surface 44a is provided that presses the hook member 43 in sliding contact and rotates the hook member 43 in the positive rotation direction. The operation surface 44a is formed to be inclined so as to be located on the inner side in the vehicle width direction as it goes to the front end (upper end) of the wedge member 44 in the forward direction. Further, at the lower position of the outer surface of the wedge member 44 in the vehicle width direction, the wedge member 44 moves forward and is held at a predetermined forward position (a position indicated by a solid line in FIG. 5). Accordingly, a restraining surface 44b is provided which is in surface contact with the hook member 43 in the vehicle width direction perpendicular to the advancing / retreating movement direction of the wedge member 44 and restrains the hook member 43 in the engaged state. The constraining surface 44b is formed to extend in the vertical direction so as to be parallel to the second end surface 43b of the hook member 43 when the hook member 43 is in the engaged state. The operating surface 44a and the restraining surface 44b are arranged so as to be continuous in the vertical direction with a corner portion 44c at a substantially central position in the vertical direction outside the wedge width of the wedge member 44 as a boundary. Reference numeral 47 in FIG. 5 denotes a stopper member that comes into contact with the hook member 43 when the hook member 43 is rotated in the forward rotation direction around the rotation center shaft 42 and converted into the engaged state. The hook member 43 is positioned in the engaged state by the member 47. In FIG. 5, reference numeral 48 denotes a guide member that is provided adjacent to the bottom surface of the base 41 with a space in which the wedge member 44 (restraint surface 44 b) can be inserted in the vehicle width direction. When the restraining surface 44b of the wedge member 44 is in sliding contact, the wedge member 44 can be moved back and forth in the vertical direction along the bottom surface of the base 41.
[0046]
As shown in FIG. 7, the first end face that receives the pressing force in the positive rotation direction is in sliding contact with the operating surface 44 a at the lower position inside the circumferential direction 43 </ b> A of the hook member 43 in the vehicle width direction. 50 is provided. The first end surface 50 has a flat portion 43a extending substantially in the advancing / retreating axis x (see FIG. 8) direction at the lower position on the inner side in the vehicle width direction on the circumferential surface 43A when the hook member 43 is in the disengaged state. The flat portion 43a is continuously constituted by an upper corner radius portion 43d and a lower corner radius portion 43c that are curved outward in the vehicle width direction at both upper and lower end positions. Further, when the hook member 43 is in an engaged state, the rotation around the rotation center shaft 42 is prevented at the lower position on the inner side in the vehicle width direction on the circumferential surface 43A by contacting the restraint surface 44b. A second end face 43b constrained by the state is provided. The restraining surface 44b of the wedge member 44 and the second end surface 43b of the hook member 43 are parallel to each other in the forward direction of the wedge member 44 when the hook member 43 is in the engaged state. It is provided to extend in the vertical direction.
[0047]
The rotation center shaft 42 of the hook member 43 has a rotation direction opposite to the specific rotation direction based on its own weight with respect to the hook member 43 in the engaged state (counterclockwise direction indicated by a broken line arrow B in FIGS. 5 and 7). The hook member 43 is disposed so as to be decentered inward in the vehicle width direction from the position of the center of gravity (not shown) of the hook member 43 so that a rotational moment rotating in the direction) is applied. The lower corner rounded portion 43c is a tip of the operating surface 44a of the wedge member 44 so as to restrict the rotation in the reverse rotation direction based on the weight of the hook member 43 when the hook member 43 is in the disengaged state. (Upper end) is in contact.
[0048]
Further, the hook member 43 and the wedge member 44 are arranged such that when the hook member 43 is in the disengagement position, the first end face 50 (the flat portion 43a, the upper corner round portion 43d and the lower corner round corner) of the hook member 43 The orthogonal lines t and t 'perpendicular to the tangent lines s and s' of the operating surface 44a of the wedge member 44 that is in sliding contact with the portion 43c) pass through the center of gravity position side of the rotation center axis 42 of the hook member 43, that is, below. It is arranged to be positioned. As a result, the hook member 43 is moved around the rotation center axis 42 in accordance with the forward movement amount of the wedge member 44 while the operating surface 44a of the wedge member 44 is in sliding contact with the first end surface 50. It will rotate in the direction of rotation.
[0049]
As shown in FIG. 8, the electric motor 51 has an output shaft 51 a parallel to an advance / retreat axis x extending in the advance / retreat direction of the wedge member 44. A drive gear 51b is rotatably connected to the output shaft 51a, and a reduction gear 52 is engaged with the drive gear 51b. A first rod member 53 is rotatably supported on the advancing / retracting shaft x, and a driven gear 53a is connected to the lower end portion of the first rod member 53 so as to rotate together. The driven gear 53a is engaged with the drive gear 51b via the reduction gear 52, and the first rod member 53 is rotated around the forward / backward axis x by the electric motor 51. A male screw portion 54 is provided on the upper portion of the first rod member 53. A second rod member 57 is provided on the advance / retreat axis x, and a cylindrical portion 57a for externally fitting the male screw portion 54 is provided below the second rod member 57. A female screw portion 55 that is screwed into the male screw portion 54 is formed on the inner peripheral surface of the cylindrical portion 57a. The lower end of the wedge member 44 is connected to the upper end portion of the second rod member 57 via a pin 56. The second rod member 57 has a groove (not shown) extending in the advancing / retreating axis x direction on its outer peripheral surface, and a projection (not shown) of a housing case 46a described later is slidable in the groove. By engaging, the rotation around the advance / retreat axis x is restricted, and the electric motor 51 is configured to advance / retreat in the advance / retreat axis x direction according to the rotational force of the first rod member 53 rotating around the advance / retreat axis x. ing. The electric motor 51, the drive gear 51b, the reduction gear 52, the driven gear 53a, the first rod member 53, and the second rod member 57 constitute a drive means 46. Each component of the drive means 46 is built in the housing case 46a of the drive means 46, and only the upper part of the second rod member 57 projects out of the housing case 46a. It is possible to move forward and backward in the x direction. Then, the first rod member 53 (male screw portion 54) and the second rod member 57 (female screw portion 55) provide the rotational force of the first rod member 53 rotated around the forward / backward axis x by the electric motor 51. A rotational force converting mechanism 58 is configured to convert the wedge member 44 into a forward / backward moving force in the forward / backward direction and transmit the converted force to the wedge member 44. In the rotational force converting mechanism 58, the first rod member 53 is moved forward and backward through the reduction gear 52 by the rotation of the output shaft 51a of the electric motor 51 in the forward rotation direction (the direction indicated by the solid line arrow E in FIG. 8). When rotating in the forward rotation direction (the direction indicated by the solid line arrow F in FIG. 8), the second rod member 57 is moved forward (the direction indicated by the solid line arrow G in FIG. 8) to output the output shaft of the electric motor 51. When the first rod member 53 rotates in the reverse rotation direction (the direction indicated by the broken line arrow H in FIG. 8), the first rod member 53 rotates in the reverse rotation direction about the advance / retreat axis x (the direction indicated by the broken line arrow J in FIG. 8). ), The second rod member 57 is moved backward (moved in the direction of the broken line arrow K shown in FIGS. 5 and 7). The electric motor 51 is connected with two flexible cords 59, 59, and power is supplied to the electric motor 51 through the cords 59.
[0050]
Here, the conversion operation of the hook member 43 that engages or disengages the engaging claw 49 with the outer edge of the rear lower end of each main girder 21 of the container 2 is performed on each vehicle body frame 11 (each subchassis 13). Description will be made along the procedure for loading and unloading the container 2 and tilting.
[0051]
First, the conversion operation of the hook member 43 will be described along the procedure in the case where the container 2 placed on the ground is loaded on each subchassis 13. In this case, it is assumed that each jack 14 is overhanging.
[0052]
First, as shown by a one-dot chain line in FIG. 2, the telescopic cylinder 34e is contracted to position the base arm portion 34b and the protruding arm portion 34c in the retracted position with respect to the base arm portion 34a. Thereby, the rotation restriction of the L-shaped arm 34 is released with respect to the front end portion of each tilting frame 32, and the L-shaped arm 34 can rotate around the second vehicle width direction axis 33.
[0053]
Next, as indicated by a two-dot chain line in FIG. 2 and a solid line in FIG. 3, the cargo handling cylinder 35 is extended to rotate the L-shaped arm 34 rearward around the second vehicle width direction axis 33. As indicated by the chain line, the hook part 34d at the tip of the protruding arm part 34c is engaged with the engaging pin 22 of the container 2 in the ground placement state (shown by the one-dot chain line in FIG. 3). From this state, as shown by a two-dot chain line in FIG. 2 and a solid line in FIG. 3, the cargo handling cylinder 35 is contracted to rotate the L-shaped arm 34 forward around the second vehicle width direction axis 33, As indicated by a one-dot chain line in FIG. 2, the container 2 engaged with the hook portion 34 d is placed on each sub chassis 13 while being guided by the guide roller 16. Thereafter, as shown by the solid line in FIG. 2, the container 2 is moved to the center of each sub-chassis 13 by extending the telescopic cylinder 34e and positioning the base arm portion 34b and the protruding arm portion 34c at the forward position with respect to the base arm portion 34a. It is loaded on the part 13M and converted into an in-vehicle state (state indicated by a solid line in FIG. 2).
[0054]
Then, the container 2 is engaged by the container splash prevention device 40.
[0055]
Specifically, as shown in FIG. 8, the output shaft 51 a of the electric motor 51 is rotated in the forward rotation direction (the direction of the solid arrow E shown in FIG. 8), and the first rod member 53 is advanced and retracted via the reduction gear 52. It is rotated around the axis x in the forward rotation direction (the direction of the solid arrow F shown in FIG. 8). Then, the rotational force of the first rod member 53 in the forward rotation direction about the advance / retreat axis x causes the second rod member 57 to move forward (in the direction indicated by the solid arrow G in FIG. 8) by the rotational force conversion mechanism 58. Converted into the forward movement force, the wedge member 44 is moved forward along the bottom surface of the base 41 as indicated by a two-dot chain line in FIG. At this time, as shown in FIG. 7, the tangent line of the operating surface 44a of the wedge member 44 that is in sliding contact with the first end surface 50 (the flat portion 43a, the upper and lower corner rounded portions 43d, 43c) in the periphery 43A of the hook member 43. The orthogonal lines t and t ′ orthogonal to s and s ′ are located at any time below the rotation center shaft 42 of the hook member 43. As a result, the hook member 43 rotates in a positive rotation direction (clockwise direction indicated by a solid arrow A in FIGS. 5 and 7) around the rotation center axis 42 until it abuts against the stopper member 47 and engages ( The state shown in FIG. 5 and FIG. 7 is indicated by a solid line), and the engaging claw portion 49 engages with the outer edge of the rear lower end of each main girder 21 of the container 2. For this reason, even if the container 2 tries to jump up at the rear end portion 13R of each subchassis 13 in which road surface vibration or the like is amplified, the rear end of each main girder 21 of the container 2 is hooked by the hook member 43 at the rear end portion 13R. By being engaged, the jumping of the rear portion of the container 2 is sufficiently suppressed. Accordingly, it is possible to reduce the impact load due to the container 2 jumping up at the rear end portion 13R and effectively prevent the tail lamp from being disconnected, and to suppress the impact sound at the rear end portion 13R when the container 2 jumps up. be able to.
[0056]
Further, by rotating the output shaft 51a of the electric motor 51 and rotating the first rod member 53 around the advance / retreat axis x, the wedge member 44 is moved forward and backward by the forward / backward moving force of the second rod member 57, so that the hydraulic cylinder The hook member 43 is reliably restrained to the engaged state without the risk of causing the conversion operation from the engaged state of the hook member 43 to the disengaged state due to oil leakage over time that occurs when a driving means such as is used. can do. Moreover, it is only necessary to connect the flexible cords 59, 59 to supply power to the electric motor 51, and the hydraulic pipe layout is thick and inflexible as in the case of using a hydraulic cylinder as the driving means. It is possible to smoothly lay out the cords 59 and 59 that can be thinly changed without being bothered.
[0057]
Thereafter, as shown by solid lines in FIGS. 5 and 7, when the wedge member 44 is further moved upward along the bottom surface of the base 41, the corner portion 44 c of the wedge member 44 becomes the upper corner radius portion 43 d of the hook member 43. The second end surface 43b of the periphery 43A of the hook member 43 and the restraining surface 44b of the wedge member 44 are in surface contact with each other, and the hook member 43 is prevented from rotating about the rotation center axis 42 by this surface contact. It will be restrained by the engagement state. When the hook member 43 is in the engaged state by being restrained in this way, the surface contact is made with respect to the second end surface 43b of the hook member 43 so that the restraining surface 44b of the wedge member 44 moves in the vertical direction of the wedge member 44. Therefore, even if an impact load from the vertical direction when the container jumps up is transmitted to the hook member 43, the transmitted impact load is restrained surface 44b of the wedge member 44. On the other hand, the second end surface 43b of the hook member 43 acts from the vertical direction in which the surface contact is made, and is smoothly absorbed by the sliding contact in the vertical direction at each surface contact portion. Thereby, the transmission of the impact load when the container jumps up is reliably interrupted at the surface contact portion, and is transmitted through the wedge member 44 in the advance / retreat axis x direction (the output shaft 51a direction) of the drive means 46 (electric motor 51). It is possible to reliably prevent the impact load from acting on the electric motor 51 and the rotational force conversion mechanism 58 from the vertical direction as a load that can cause failure. The durability of the force conversion mechanism 58 can be dramatically improved.
[0058]
Furthermore, the surfaces of the restraining surface 44b of the wedge member 44 and the second end surface 43b of the hook member 43 are brought into surface contact with each other in a straight line over the advancing / retreating movement direction of the wedge member 44, so It is possible to sufficiently resist the impact load from the vehicle width direction by supporting it with the restraining surface 44b having a large surface area, and to block the transmission of the impact load to the electric motor 51 and the rotational force conversion mechanism 58. It becomes. Accordingly, it is of course very advantageous to further improve the durability of the electric motor 51 and the torque conversion mechanism 58, and the hook member 43 is attached to the outer edge of the rear lower end of the main girder 21 of the container 2. On the other hand, it is very advantageous in terms of restraining the engaged state more securely.
[0059]
Moreover, when the hook member 43 is in the engaged state, the restraint surface 44b of the wedge member 44 is in surface contact with the second end surface 43b of the hook member 43 in the vehicle width direction perpendicular to the advancing / retreating movement direction of the wedge member 44. When the hook member 43 is restrained, the forward movement amount of the wedge member 44 after the hook member 43 is converted to the engaged state is the restraining surface 44b of the wedge member 44 with respect to the second end face 43b of the hook member 43. As long as the minimum amount that enables surface contact with each other is ensured, the wedge member 44 may be set by moving the wedge member 44 forward further upward. Accordingly, when the hook member 43 is constrained to the engaged state, it is not necessary to strictly set the forward movement amount of the wedge member 44, and the accuracy of the wedge member 44 and the drive means 46 is lowered to reduce the cost. be able to.
[0060]
Next, the conversion operation of the hook member 43 will be described along the procedure when the container 2 mounted on each subchassis 13 is lowered to the ground. Also in this case, it is assumed that each jack 14 is overhanging. Further, it is assumed that the rear wall 2d of the container 2 is secured by a rear wall securing device.
[0061]
First, the container 2 is disengaged by the container splash prevention device 40.
[0062]
Specifically, as shown in FIG. 8, the output shaft 51 a of the electric motor 51 is rotated in the reverse rotation direction (the direction of the broken line arrow H shown in FIG. 8), and the first rod member 53 is advanced and retracted via the reduction gear 52. It is rotated around the axis x in the reverse rotation direction (the direction of the broken arrow J shown in FIG. 8). Then, the rotational force in the reverse rotational direction around the advance / retreat axis x of the first rod member 53 causes the rotational force conversion mechanism 58 to move the second rod member 57 downward (in the direction indicated by the broken line arrow K in FIG. 8). It is converted into a backward movement force, and the wedge member 44 is moved backward along the bottom surface of the base 41 as shown by a solid line in FIG. Then, the rotation restraint of the hook member 43 due to mutual surface contact between the second end surface 43b of the hook member 43 in the engaged state and the restraining surface 44b of the wedge member 44 is released, and the corner portion 44c of the wedge member 44 is released from the hook member 43. The upper corner rounded portion 43d is overcome. Then, the hook member 43 automatically rotates in the reverse direction around the rotation center axis 42 due to its own weight as the wedge member 44 moves backward (the counterclockwise direction indicated by the broken arrow B in FIGS. 5 and 7). To the disengaged state (the state indicated by the two-dot chain line in FIG. 5 and FIG. 7), and is engaged with the outer edge of the rear lower end of each main girder 21 of the container 2 mounted on each sub chassis 13. The pawl portion 49 is disengaged. At this time, the lower corner rounded portion 43c of the hook member 43 (first end surface 50) abuts against the tip (upper end) of the operating surface 44a of the wedge member 44 when the hook member 43 is in the disengaged state. Since the rotation in the reverse rotation direction based on the weight of the hook member 43 is restricted, the rotation of the output shaft 51a of the electric motor 51 in the forward rotation direction causes the second rod member 57 to move forward to move the wedge member 44. Simultaneously with the forward movement, the hook member 43 rotates in the forward rotation direction around the rotation center shaft 42, and the hook member 43 can be quickly converted into the engaged state. In addition, it is not necessary to prepare a separate stopper for restricting the rotation in the reverse rotation direction based on the weight of the hook member 43 when the hook member 43 is in the disengaged state, and the number of parts using the wedge member 44 is reduced. Can be reduced.
[0063]
2, the telescopic cylinder 34e is contracted so that the base arm portion 34b and the protruding arm portion 34c are positioned in the retracted position with respect to the base arm portion 34a, and the front end portion of each tilting frame 32 is L. The restriction on the rotation of the shaped arm 34 is released, and the L-shaped arm 34 can be rotated around the second vehicle width direction axis 33.
[0064]
Thereafter, as indicated by a two-dot chain line in FIG. 2 and a solid line in FIG. 3, the cargo handling cylinder 35 is extended to rotate the L-shaped arm 34 rearward about the second vehicle width direction axis 33, and to the hook portion 34 d. The engaged container 2 is lowered to the ground while being guided by the guide roller 16. Then, the hook part 34d is disengaged from the engagement pin 22 of the container 2 on the ground by moving the container carrier 1 forward. Thereafter, the cargo handling cylinder 35 is contracted and the L-shaped arm 34 is rotated forward about the second vehicle width direction axis 33, and then the telescopic cylinder 34e is extended to protrude the base arm portion 34b and the base arm portion 34a. The arm part 34c is positioned at the forward movement position.
[0065]
In addition, the conversion operation of the hook member 43 will be described along a procedure when the container 2 mounted on each subchassis 13 is tilted to discharge the contents in the container 2. In this case, it is assumed that the rear wall 2d is secured by the rear wall securing device.
[0066]
First, the container 2 is disengaged by the container jump prevention device 40 in the same manner as when the container 2 mounted on each sub-chassis 13 is lowered to the ground.
[0067]
Then, as shown by the solid line in FIG. 4, the base cylinder 34b and the projecting arm 34c are positioned at the forward position with respect to the base arm 34a while holding the telescopic cylinder 34e in the extended state. As a result, the L-shaped arm 34 is restricted from rotating with respect to the front end portion of each tilting frame 32 so that the L-shaped arm 34 cannot rotate about the second vehicle width direction axis 33.
[0068]
Thereafter, as shown by a one-dot chain line in FIG. 4, the cargo handling cylinder 35 is extended to hold the L-shaped arm 34 in a substantially straight line, and the first vehicle width direction shaft 31 with respect to each sub chassis 13 together with each tilting frame 32. It is rotated backward and converted into an inclined state (state indicated by a one-dot chain line in FIG. 4) having a downward gradient of about 45 °. As a result, the container 2 loaded along each tilt frame 32 in the tilted state and on the L-shaped arm 34 held so as to extend substantially linearly with respect to each tilt frame 32 is tilted (see FIG. 4). The posture is changed to a state indicated by a one-dot chain line), the rear wall 2d is opened under the influence of its own weight and the weight of the contents, and the contents in the container 2 are discharged.
[0069]
Thereafter, as shown by a solid line in FIG. 4, the cargo handling cylinder 35 is contracted to convert each tilting frame 32 to the vehicle-mounted state while the L-shaped arm 34 is held in a substantially straight line, and then the rear wall 2d of the container 2 Is secured by a rear wall lashing device, and the hook member 43 is converted into an engaged state and the outer side of the rear lower end of each main girder 21 of the container 2 in the same manner as in the case where the container 2 is loaded on each subchassis 13. The engaging claw portion 49 is engaged with the edge.
[0070]
<Other embodiments>
The present invention is not limited to the above-described embodiment, and includes various other embodiments. For example, in the above-described embodiment, the rear portion of the container 2 is engaged or engaged by the container splash prevention device 40. However, the container may be disengaged by the container splash prevention device at a location other than the rear portion of the container, for example, the central portion.
[0071]
In the above embodiment, the container 2 is mounted on the vehicle body frame 11 by the cargo handling device 3, but the container may be mounted on the vehicle body frame by a crane or the like.
[0072]
Furthermore, in the said embodiment, the hook member 43 was mutually converted into the engagement state and the disengagement state by making the operation surface 44a of the wedge member 44 slidably contact with the 1st end surface 50 of the hook member 43. However, the wedge member is disposed on the outer side in the vehicle width direction of the hook member, and the wedge member is moved forward and backward in the vertical direction, so that the vehicle width of the wedge member with respect to the first end surface of the hook member on the outer side in the vehicle width direction is Of course, the hook member may be converted into the engaged state and the disengaged state by bringing the working surface inside in the direction into sliding contact. Further, the advancing / retreating direction of the hook member may be not only the vertical direction but also the horizontal direction (vehicle width direction) or the oblique direction. In this case, the positions of the first end surface and the second end surface of the hook member that are in sliding contact and surface contact with the operating surface and the restraining surface of the wedge member may be shifted by the amount corresponding to the direction change.
[0073]
Moreover, in the above-described embodiment, the actuator is configured by the electric motor 51, but the actuator may be configured by a hydraulic cylinder. In this case, the hydraulic cylinder is arranged so that the wedge member moves forward and backward by the vertical expansion and contraction operation, and the impact load when the container jumps up does not act on the hydraulic cylinder from the forward and backward movement direction of the wedge member. In addition, it is possible to prevent an excessive load from being applied to the hydraulic cylinder, thereby dramatically improving the durability of the hydraulic cylinder, and it is possible to reliably restrain the hook member in the engaged state.
[0074]
【The invention's effect】
As described above, according to the container splash prevention device of the container transport vehicle of the first aspect of the present invention, the hook member is automatically rotated in the reverse direction around the rotation center axis by its own weight, and the hook member is engaged with the container. On the other hand, the hook member is engaged with the hook member by rotating the hook member in the specific rotation direction around the rotation center axis while causing the operation surface to slide in contact with the first end surface of the hook member as the operation member moves forward. Further, when the hook member is in the engaged state, the operating member is further moved forward to bring the restraining surface into surface contact with the second end surface of the hook member, thereby engaging the hook member. By constraining the joint state, the impact load from the up and down direction when the container jumps up is applied to the restraint surface from the surface contact direction of the second end surface, so that the actuator is operated. Prevented thereby acts as an excessive load from direction, the durability of the actuator can be improved dramatically by eliminating the failure cause of the actuator. In addition, it is not necessary to strictly set the amount of forward movement of the operating member when the hook member is constrained to the engaged state, and the accuracy of the operating member and the actuator can be reduced to reduce the cost. Furthermore, the hook member can be automatically rotated in the reverse rotation direction only by decentering the rotation center axis of the hook member with respect to the center of gravity, and the number of parts can be reduced because the rotation urging means is unnecessary.
[0075]
According to the container bouncing prevention device for the container transport vehicle of the second aspect of the present invention, the operating member is moved forward and backward in the vertical direction, and the restraining surface is moved to the second end surface of the hook member when the hook member is in the engaged state. On the other hand, by making surface contact from the vertical direction, transmission of impact load when the container jumps up is blocked at the surface contact portion between the restraining surface of the actuating member and the second end surface of the hook member, and the actuator is subjected to excessive load due to impact load. Can be reliably eliminated.
[0076]
According to the container splash prevention device of the container transport vehicle of the invention described in claim 3, the orthogonal line perpendicular to the tangent of the operating surface of the operating member that is in sliding contact with the first end surface of the hook member is set to be greater than the rotation center axis of the hook member. By being positioned at a position that passes through the position of the center of gravity, the sliding contact direction of the operation surface with respect to the first end surface of the hook member can be expanded, and the degree of freedom of the layout of the hook member and the operation member can be increased.
[0077]
According to the container splash prevention device of the container transport vehicle of the invention described in claim 4, when the hook member is in the engaged state, the restraining surface of the actuating member and the second end surface of the hook member are extended in the advancing direction of the actuating member. Thus, by making the surface contact in a straight line in the vertical direction, the durability of the actuator can be further improved, and the hook member can be more reliably restrained from being engaged with the container.
[0078]
According to the container bouncing prevention device of the container transport vehicle of the invention described in claim 5, the first end surface of the hook member in the disengaged state is brought into contact with the operation surface of the operation member, so that the weight of the hook member is reduced. The rotation in the reverse rotation direction can be restricted, and the hook member can be promptly converted into the engaged state in accordance with the forward movement of the operating member. In addition, it is possible to reduce the number of parts that effectively use the actuating member by eliminating the stopper that holds the hook member in the disengaged state.
[0079]
According to the container bouncing prevention device of the container transport vehicle of the invention described in claim 6, by applying an electric motor as an actuator, the hook member due to oil leakage over time such as that using an actuator such as a hydraulic cylinder is used. The operation conversion is prohibited, and the hook member can be reliably restrained in the engaged state. In addition, it is only necessary to connect a flexible cord to the electric motor and supply power, and this finely modifiable cord can be laid out smoothly.
[0080]
According to the container bouncing prevention device of the container transport vehicle in the invention of claim 7, it is possible to effectively prevent the container from bouncing up by engaging the container with the L-shaped arm and the hook member at the front and rear end positions. In addition, an impact load that increases at the container rear end position when the container jumps up can be effectively suppressed by the hook member.
[Brief description of the drawings]
FIG. 1 is a plan view of a container transport vehicle according to an embodiment of the present invention.
FIG. 2 is a side view of a container transport vehicle showing a first half process of a container loading / unloading operation by a cargo handling cylinder.
FIG. 3 is a side view of the container transporter showing the latter half of the container loading / unloading operation by the cargo handling cylinder.
FIG. 4 is a side view of a container transport vehicle showing a posture changing operation between a container placement state and an inclined state by a cargo handling cylinder.
FIG. 5 is a rear view as seen from the rear of the vehicle body in a state in which the container splash prevention device is partially cut away.
FIG. 6 is a side view of the container splash prevention device as viewed from the side of the vehicle body.
7 is an enlarged explanatory view of a main part of FIG. 5 for explaining a sliding contact state between a hook member and a wedge member.
FIG. 8 is a rear view as seen from the rear of the vehicle body with the drive means partially cut away.
[Explanation of symbols]
1 Container carrier
2 containers
11 Body frame (chassis)
42 Center of rotation
43 Hook member
Around 43A
43b Second end face
44 Wedge member (actuating member)
44a Working surface
44b Restraint surface
50 First end face
51 Electric motor (actuator)
s, s' tangent
t, t 'orthogonal line

Claims (7)

A container bouncing prevention device for a container transport vehicle that prevents bouncing of a container mounted on a chassis,
A hook member rotatably connected about a rotation center axis extending in the longitudinal direction of the vehicle body and engaged with the container by rotation in a specific rotation direction around the rotation center axis;
The hook members are not connected to each other and are converted into an engaged state in which the hook member is engaged with the container and a disengaged state in which the engagement is released with respect to the container by moving forward and backward. An actuating member,
An actuator for moving the operating member forward and backward,
The operating member is
An operation surface that slides against the hook member by the forward movement and presses the hook member to rotate in the specific rotation direction;
A restraining surface that holds the hook member in the engaged state by being in surface contact with each other in a direction perpendicular to the advancing / retreating movement direction of the operating member by being held at a predetermined advance position;
The hook member is
A first end face that is in sliding contact with the operating surface and receives a pressing force in the specific rotation direction;
The peripheral surface is provided with a second end surface that is in surface contact with the constraining surface and constrained in a state in which rotation about the rotation center axis is prevented,
The center axis of rotation of the hook member is
The hook member in the engaged state is positioned at a position deviated from the center of gravity of the hook member in the vehicle width direction so that a rotational moment that rotates in the direction opposite to the specific rotation direction acts on the hook member based on its own weight. A container splash prevention device for a container transport vehicle, wherein In claim 1,
An apparatus for preventing container splashing of a container transport vehicle, wherein the operating member is provided so as to move forward and backward in the vertical direction, and the operating member moves upward when the operating member moves forward. In claim 1 or claim 2,
Hook member and actuating member
The orthogonal line orthogonal to the tangent of the operating surface of the operating member that is in sliding contact with the first end surface of the hook member is disposed so as to be positioned at a position that passes through the center of gravity side of the rotation center axis of the hook member. A container splash prevention device for a container transport vehicle. In claim 3,
The restraining surface of the actuating member and the second end surface of the hook member extend in the vertical direction in parallel with each other toward the advancing direction of the actuating member when the hook member is in the engaged state. A container splash prevention device for container transport vehicles. In any one of Claims 1-4,
The first end surface of the hook member is
When the hook member is in a disengaged state, the hook member is in contact with the operating surface of the operating member so as to be restricted from rotating in the reverse direction around the rotation axis due to the weight of the hook member. A container splash prevention device for container transport vehicles. In claim 1,
An apparatus for preventing container jumping of a container transport vehicle, wherein an electric motor for moving an operating member back and forth by a rotational force is applied as an actuator. In claim 1,
A container mounted on a chassis equipped with a cargo handling device having an L-shaped arm is held by the L-shaped arm at its front end position,
A container splash prevention device for a container transport vehicle, wherein the hook member is disposed so as to engage with a rear end position of the container.

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