JP2008189004A - Container loading semi-trailer - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To easily load and unload a cargo into a container in a state of loading a container on a semi-trailer in a state of dislocating container rear end to the front side in the traveling direction more than the rear end of the semi-trailer. <P>SOLUTION: This container loading semi-trailer can vertically movably drive a rear deck 31 to a deck installing part 25 by first driving mechanisms 41a and 41b and second driving mechanisms 42a and 42b. Thus, a step height can be eliminated between the rear deck 31 and a floor surface in the container, and loading-unloading work of the cargo can be easily performed to the container loaded in a state of dislocating the rear end of the container to the front side in the traveling direction more than the rear end of a main frame. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a container-loading semi-trailer that is driven by a tractor and transports a container.

  In a connected vehicle having a tractor that is a tow vehicle and a trailer that is a towed vehicle, a full trailer with a loading platform provided on the towing vehicle side, and a coupler that connects the front side of the towed vehicle with the loading platform provided only on the towed vehicle There is a semi-trailer that is connected to the towing vehicle by. Containers loaded on the semi-trailer include a small container with a 20-foot length in the direction of travel of the vehicle and a large container with a length of 40 feet. There is a type and a dual-purpose type that can load both lengths.

  Since the container-loading semi-trailer is driven by being pulled by the tractor, no driving wheel is provided, and a traveling axle having a traveling wheel that follows is disposed on the rear end side of the semi-trailer. The semi-trailer is usually provided with one to three traveling axles.

  The loading and unloading of cargo into the container is performed by a cargo unloading vehicle such as a forklift or a trolley with the rear end of the semi-trailer approaching the platform provided at the entrance of the warehouse. It is desirable that the container is loaded on the semi-trailer so as to be close to the rear end. However, since the semi-trailer is connected to the trailer by a coupler provided at the tip of the semi-trailer and is pulled by a tractor having a driving wheel, if the load is not applied from the semi-trailer to the driving wheel of the tractor at the coupling portion, the driving wheel Slipping and traction traveling by the tractor cannot be performed stably. Therefore, a load is applied to the tractor from the semi-trailer by attaching a weight of a predetermined weight to the front end portion of the semi-trailer.

Patent Document 1 describes a semi-trailer in which a container is mounted on a semi-trailer so as to be movable in the direction of travel of the trailer. In this semi-trailer, when loading and unloading cargo into the container, the rear end of the container is brought close to the rear end of the semi-trailer, and when the semi-trailer is running, the container is slid forward in the running direction to load the container. Is added to the drive wheel of the tractor.
JP 2000-142205 A

  As described above, in order to change the position of the container in the traveling direction between loading and unloading the luggage into the container and traveling the luggage, a large driving device for sliding the heavy container is required. , Semi-trailer manufacturing costs increase.

  An object of the present invention is to enable easy loading and unloading of luggage into a container in a state where the container is loaded on the semi-trailer with its rear end shifted to the front side in the traveling direction from the rear end of the semi-trailer. is there.

  Another object of the present invention is to load a large container with the rear end of the container approaching the rear end of the semi-trailer and to load a small container with the rear end of the container shifted from the rear end of the semi-trailer. It is to be able to easily switch to a state.

  The container-loading semi-trailer of the present invention comprises a main frame on which a container is loaded, comprising a plurality of vertical beam members extending in the traveling direction and a plurality of horizontal beam members extending in the lateral direction and interconnecting the vertical beam members. A container-loading semi-trailer provided with a king pin connected to the tractor at the front end of the main frame and provided with a traveling wheel on the rear end, the deck mounted on the rear end of the main frame A container supporting portion provided on the main frame in front of the deck mounting portion, and mounted on the deck mounting portion so as to be movable up and down, and a luggage is loaded in a small container loaded on the container supporting portion. It is attached to either the rear deck that moves up and guides the cargo unloading vehicle when loading or unloading, and the rear deck or the deck mounting portion. A guide cylinder that is mounted on one of the other guide cylinders, is slidably mounted in the guide cylinder, and is rotatably mounted on the guide cylinder to rotate the drive shaft of the slide cylinder. A first drive mechanism having a feed shaft for converting into a sliding motion with respect to the guide cylinder, and moving the rear deck up and down relative to the deck mounting portion; and shifted in the front-rear direction with respect to the first drive mechanism A guide cylinder attached to the rear deck, a slide cylinder that is slidably mounted in the guide cylinder, and a lower end that contacts the traveling ground, and a guide cylinder that is rotatably mounted on the guide cylinder and rotates the drive shaft. And a second drive mechanism having a feed shaft for converting the sliding cylinder into a sliding movement with respect to the guide cylinder, and moving the rear deck up and down with respect to the traveling ground. That.

  The container loading semi-trailer according to the present invention is configured such that when a large container having a length longer than that of the small container is loaded on the main frame, the upper surface of the rear deck is set to be substantially the same height as the upper surface of the container support portion. The rear end of the large container is supported by the rear deck after positioning.

  In the container-loading semi-trailer according to the present invention, the first drive mechanism is provided on each of the left and right sides of the rear deck, the drive shafts of the left and right first drive mechanisms are connected to each other, and the second drive mechanism is One is provided on each of the left and right sides of the rear deck, and the drive shafts of the left and right second drive mechanisms are connected to each other.

  The container-loading semi-trailer according to the present invention is characterized in that each of the drive shafts of the first drive mechanism and the second drive mechanism is rotationally driven by a manual handle.

  The container-loading semi-trailer according to the present invention includes a low-speed gear train and a high-speed gear between the drive shaft of the second drive mechanism and a handle shaft that is arranged in parallel to the drive shaft and on which a manual handle is mounted. When the guide cylinder is raised with respect to the slide cylinder after the lower end of the slide cylinder of the second drive mechanism comes into contact with the traveling ground, the low-speed gear train is used. By operating the manual handle, the load applied to the manual handle can be made smaller than when operating the manual handle via the high-speed gear train.

  The container-loading semi-trailer according to the present invention is characterized in that the drive shafts of the first drive mechanism and the second drive mechanism are rotationally driven by an electric motor or a fluid pressure motor.

  The container-loading semi-trailer of the present invention is provided with a rear transfer plate rotatably at the rear end of the rear deck, and the platform and the rear deck are separated by the transfer plate when loading and unloading the cargo in the small container. It is characterized by bridging between.

  The container-loading semi-trailer of the present invention is provided with a front-side transfer plate rotatably at the front end of the rear deck, and when the cargo is loaded and unloaded in the small container, the transfer plate allows the rear deck and the small container to be unloaded. It is characterized by a bridge between the floor.

  The container-loading semi-trailer according to the present invention is swingably attached to the slide cylinder in a stored state in which the slide cylinder of the second drive mechanism enters the retreat limit position in the guide cylinder. The deck mounting portion is provided with a stopper for contacting the leg portion and fixing the leg portion.

  The container-loading semi-trailer of the present invention is characterized in that a safety fence is provided on the rear deck.

  The container-loading semi-trailer according to the present invention is characterized in that a notch is formed in the left and right corners of the rear end portion of the rear deck, and the rear end surface of the rear deck and the rear end surface of the rear deck mounting portion are aligned.

  According to the present invention, since the container can be loaded while being shifted to the front side of the main frame, it is possible to apply the load of the container to the driving wheel of the tractor without mounting the load on the front end portion of the main frame. The semi-trailer can be smoothly pulled by the tractor.

  According to the present invention, since the rear deck can be driven to move up and down with respect to the deck mounting portion by the first drive mechanism and the second drive mechanism, there is a step between the rear deck and the floor in the container. The container can be easily loaded and unloaded from the loaded container with the rear end of the container being shifted to the front side in the traveling direction from the rear end of the main frame. In addition, since the first drive mechanism and the second drive mechanism can make the rear deck floor surface height different from the front to the back, the platform floor surface and the rear deck rear surface can be adjusted while matching the container floor surface and the rear deck front floor surface height. It is possible to match the side floor height.

  According to the present invention, by making the upper surface of the rear deck substantially coincide with the upper surface of the container support portion of the main frame, not only a small container with the rear end of the container shifted from the rear end of the semi-trailer, but also the rear of the container. Large containers can be loaded with the end approaching the rear end of the semi-trailer. When loading and unloading a small container loaded in a state shifted forward from the rear end of the semi-trailer, if the rear deck is moved up and down by the first drive mechanism and the second drive mechanism, the rear deck Is directly supported on the traveling ground by the second drive mechanism, and the rear deck is stably supported.

  According to the present invention, the first drive mechanism is provided on each of the left and right sides of the rear deck, the drive shafts of the left and right first drive mechanisms are connected to each other, and the second drive mechanisms are provided on the left and right sides of the rear deck. By providing and connecting the drive shafts of the left and right second drive mechanisms to each other, the left and right first drive mechanisms and the left and right second drive mechanisms can be driven in synchronization in the vertical direction.

  According to the present invention, the rear deck can be moved up and down by a simple method by rotationally driving the drive shafts of the first drive mechanism and the second drive mechanism by the manual handle.

  According to the present invention, the low-speed gear train and the high-speed gear train are provided between the drive shaft of the second drive mechanism and the handle shaft that is arranged in parallel to the drive shaft and on which the manual handle is mounted. When the guide cylinder is raised with respect to the slide cylinder after the lower end of the slide cylinder of the second drive mechanism comes into contact with the traveling ground, the manual handle is operated via the low-speed gear train to Since the load can be made smaller than when the manual handle is operated via the gear train, the manual handle can be easily operated.

  According to the present invention, the respective drive shafts of the first drive mechanism and the second drive mechanism are rotationally driven by the electric motor or the fluid pressure motor, so that the vertical movement of the rear deck can be performed without relying on human power. .

  According to the present invention, the loading / unloading vehicle can be smoothly guided between the rear deck and the platform by rotatably mounting the transfer plate on the rear end portion of the rear deck. Further, by mounting the transfer plate on the front end portion of the rear deck so as to be rotatable, it is possible to smoothly guide the cargo unloading vehicle between the rear deck and the container.

  According to the present invention, the slide cylindrical body of the second drive mechanism is raised by providing the deck mounting portion with the stopper that contacts the leg portion swingably mounted on the slide cylindrical body and fixes the leg portion. It is possible to prevent the vibration of the leg in the state set to the limit position.

  According to the present invention, by providing a safety fence on the rear deck, it is possible to ensure the safety of an operator who loads and unloads a package from a container.

  According to the present invention, by forming a notch in the left and right corners of the rear end portion of the rear deck and aligning the rear end surface of the rear deck and the rear end surface of the rear deck mounting portion, both rear end surfaces are aligned, When the rear end of the semi-trailer is brought close to the platform, the rear deck can be brought close to the platform, and the cargo unloading vehicle can be easily moved between the rear deck and the platform.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a side view showing a container loading semi-trailer according to an embodiment of the present invention, and FIG. 2 is a plan view of FIG.

  As shown in FIG. 2, the semi-trailer 10 includes a main frame 13 including two vertical beam members 11 extending in the traveling direction and a plurality of horizontal beam members 12 extending in the horizontal direction and connecting the vertical beam members 11 to each other. have. On the rear end side of the main frame 13, three traveling axles 15 to 17 each having traveling wheels 14 provided at both ends are provided.

  The front end portions of the two vertical beam members 11 are formed with a gooseneck portion 18 that is narrower than the rear portion and protrudes upward. A king pin 19 is provided to protrude toward the surface. The semi-trailer 10 is connected to a tractor as a towing vehicle (not shown) by the king pin 19 and travels by being pulled by the tractor. As shown in FIG. 1, the front end of the semi-trailer 10 is a landing leg, i.e., supports the load at the front end of the semi-trailer 10 and keeps it in a horizontal state when the semi-trailer 10 is not connected to the tractor. A support leg 21 is mounted so as to be movable in the vertical direction. 1 and 2 show a state where the semi-trailer 10 is separated from the tractor and left alone on the traveling ground 22. Side bumpers 23 manufactured by combining a plurality of bars are attached to the main frame 13 on the left and right.

  As shown by a two-dot chain line in FIG. 1, the semi-trailer 10 selects either a small container 24a having a length in the traveling direction of 20 feet or a large container 24b having a length of 40 feet. Can be loaded. A deck mounting portion 25 is formed at the rear end of the main frame 13, and a container support portion 26 is provided in front of the deck mounting portion 25, and a small container 24 a is loaded on the container support portion 26. . When the small container 24a is loaded on the container support 26, the rear end surface of the container 24a is positioned between the intermediate traveling axle 16 and the rear traveling axle 17. On the other hand, the large container 24 b is supported by almost the entire semi-trailer 10 with its rear end portion covering the deck mounting portion 25.

  FIG. 3 is a perspective view showing a schematic structure of the deck mounting portion 25, and FIG. 4 is an enlarged side view of the deck mounting portion 25.

  The vertical beam member 11 in the deck mounting portion 25 is set to have a short vertical dimension, and as shown in FIG. 3, a crossbar 27 is fixed to the rear end of the deck mounting portion 25 extending in the horizontal direction. A cross bar 28 is fixed to the front end of the deck mounting portion 25 so as to extend in the horizontal direction. Engagement pins 29 that engage with corners of the rear end of the large container 24 b are attached to both ends of the cross bar 27 provided at the rear end of the deck mounting portion 25 via a pedestal 30.

  A rear deck 31 is mounted on the deck mounting portion 25 so as to be movable in the vertical direction. The rear deck 31 has a substantially quadrilateral frame 32, and a plurality of reinforcing beam members 33 are provided inside the frame 32. A floor plate 34 is attached to the surface of the frame 32. In addition, in FIG. 3, the floor board 34 is shown in the notched state, and only the part is shown. Notches are formed in the left and right corners 35 at the rear end of the rear deck 31, and the pedestals 30 are formed in the respective corners 35 when the rear deck 31 is moved downward as shown in FIGS. It has come in. As a result, there is no large step in the horizontal direction between the rear end surface 36 of the rear deck 31 and the rear end surface 37 of the deck mounting portion 25, so that both rear end surfaces are aligned, and the rear end of the semi-trailer is brought closer to the platform. When this is done, the rear deck 31 can be brought close to the platform, and the cargo unloading vehicle can be easily moved between the rear deck 31 and the platform.

  In order to drive the rear deck 31 in the vertical direction with respect to the deck mounting portion 25, as shown in FIG. 3, between the front end portion of the rear deck 31 and the deck mounting portion 25, two primary and secondary first drive mechanisms 41a. , 41b are mounted on the left and right sides of the vehicle. On the other hand, at the rear end portion of the rear deck 31, two main and sub second drive mechanisms 42a and 42b are mounted on the left and right sides of the vehicle so as to drive the rear deck 31 in the vertical direction with respect to the traveling ground 22. Both the first drive mechanisms 41a and 41b and both the second drive mechanisms 42a and 42b are shifted from each other in the vehicle traveling direction, that is, the front-rear direction.

  FIG. 5 is an enlarged cross-sectional view showing two first drive mechanisms 41a and 41b. The first drive mechanism 41a includes a guide cylinder 43 attached to the reinforcing beam member 33 of the rear deck 31, and the guide cylinder. 43 has a slide cylinder 44 slidably mounted in the interior of 43. A sleeve 45 facing in the vehicle width direction is fixed to the distal end portion of the slide cylinder 44, and a connecting pin 47 fixed to the deck mounting portion 25 via a bracket 46 is fitted to the sleeve 45. The body 44 is attached to the deck mounting portion 25 so as to be swingable about the connecting pin 47.

  In order to drive the slide cylinder 44 in the vertical direction with respect to the guide cylinder 43, a drive shaft 51 is rotatably mounted on the upper end portion of the guide cylinder 43 via a bearing 52. A feed shaft 54 is rotatably mounted on the support plate 53 fixed to the upper end portion of the guide cylinder 43, and a bearing 55 is mounted between the step portion formed on the feed shaft 54 and the support plate 53. The bevel gear 56 fixed to the drive shaft 51 is meshed with the bevel gear 57 fixed to the feed shaft 54. A nut 58 formed with an internal thread that meshes with the external thread of the feed shaft 54 is fixed to the slide cylinder 44. When the operator operates the manual handle 59 attached to the drive shaft 51, the drive shaft 51 is rotated. The rotation of the drive shaft 51 is transmitted to the feed shaft 54 via the bevel gears 56 and 57, and the slide cylinder 44 is driven in the vertical direction with respect to the guide cylinder 43 via the nut 58 by the rotation of the feed shaft 54. The

  The other first drive mechanism 41b has substantially the same structure as the first drive mechanism 41a. In FIG. 5, members that are the same as the members constituting the first drive mechanism 41a are assigned the same reference numerals. Has been. The drive shaft 51 of the first drive mechanism 41b is connected to the drive shaft 51 of the first drive mechanism 41a via a connecting rod 60, and the drive shaft 51 of the first drive mechanism 41a is rotationally driven by a manual handle 59. Then, the drive shaft 51 of the first drive mechanism 41b is also driven, and the slide cylinders 44 of the main and sub two first drive mechanisms 41a and 41b are driven in synchronization with the guide cylinder 43 in the vertical direction. The As a result, when each slide cylinder 44 is driven in a direction protruding from the guide cylinder 43, the rear deck 31 is driven up to a position where the upper surface on the front end side is higher than the container support 26, and the slide cylinder When the body 44 is driven to a position where it is accommodated in the guide cylinder 43, the rear deck 31 is in the lower limit position shown in FIG.

  In each of the first drive mechanisms 41a and 41b, the guide cylinder 43 is attached to the rear deck 31, and the slide cylinder 44 is swingably attached to the deck mounting portion 25 by a connecting pin 47. The slide cylinder 44 may be swingably attached to the rear deck 31 while the guide cylinder 43 may be attached to the deck mounting portion 25 by reversing the vertical relationship of the first drive mechanisms 41a and 41b.

  FIG. 6 is an enlarged cross-sectional view showing the second drive mechanism on the left side of the two main drive mechanisms 42a and 42b attached to the left and right of the rear end portion of the rear deck 31 as shown in FIG. 7 is a rear view of FIG. As shown in FIG. 3, each of the second drive mechanisms 42 a and 42 b has a guide cylinder 61 attached to the rear deck 31 and a slide cylinder 62 slidably mounted inside the guide cylinder 61. The basic structure is the same as that of the first drive mechanisms 41a and 41b. However, the guide cylinder 61 and the slide cylinder 62 of the second drive mechanisms 42a and 42b are set to be longer than the guide cylinder 43 and the slide cylinder 44 of the first drive mechanisms 41a and 41b.

  Each guide cylinder 61 is directly fixed to the reinforcing beam member 33 of the rear deck 31 at its upper end, and as shown in FIG. 7, a connecting plate 63 and the rear deck 31 for connecting the guide cylinders 61 to each other are connected. It is fixed to the rear deck 31 via two reinforcing rods 64 inclined in the vehicle width direction to be connected. Further, as shown in FIG. 4, the guide cylinder 61 is fixed to the rear deck 31 by a reinforcing rod 65 inclined in the vehicle traveling direction. FIG. 4 shows a reinforcing rod 65 that connects the guide cylinder 61 of the second drive mechanism 42a on one side and the rear deck 31. A similar reinforcing rod is used for the second drive mechanism 42b on the other side. It is also provided between the guide cylinder 61 and the rear deck 31.

  As shown in FIG. 6, a sleeve 66 facing in the vehicle width direction is fixed to the distal end portion of the slide cylinder 62, and a connecting pin 68 fixed to a leg portion 67 is fitted to the sleeve 66. The portion 67 is swingably attached to the slide cylinder 62 via a connecting pin 68.

  In order to drive the slide cylinder 62 in the vertical direction with respect to the guide cylinder 61, a drive shaft 71 is rotatably mounted on the upper end portion of the guide cylinder 61 via a bearing 72. A feed shaft 74 is rotatably mounted on the support plate 73 fixed to the upper end portion of the guide cylinder 61, and a bearing 75 is mounted between the step portion formed on the feed shaft 74 and the support plate 73. A bevel gear 76 fixed to the drive shaft 71 is engaged with a bevel gear 77 fixed to the feed shaft 74. A nut 78 formed with a female thread that meshes with the male thread of the feed shaft 74 is fixed to the slide cylinder 62, and a handle shaft 79 is rotatably mounted on the guide cylinder 61 in parallel with the drive shaft 71. A driving gear 81 fixed to 79 is engaged with a driven gear 82 fixed to the driving shaft 71, and the driving gear 81 and the driven gear 82 are incorporated in a gear box 80 fixed to the guide cylinder 61. Yes. Therefore, when the operator operates the manual handle 83 provided on the handle shaft 79 to rotate the drive shaft 71 via the handle shaft 79, the rotation of the drive shaft 71 is rotated via the bevel gears 76 and 77. The slide cylinder 62 is driven in the vertical direction with respect to the guide cylinder 61 through the nut 78 by the rotation of the feed shaft 74.

  The other second drive mechanism 42b has substantially the same structure as the second drive mechanism 42a. However, the gear box 80 is not provided in the second drive mechanism 42b, and as shown in FIG. 7, the drive shaft 71 of one second drive mechanism 42a is the drive shaft of the other second drive mechanism 42b. 71 is connected to a connecting rod 84. As a result, when the operator rotates the drive shaft 71 of the second drive mechanism 42 a by the manual handle 83, the drive shaft 71 of the second drive mechanism 42 b is driven by the second drive mechanism 42 a via the connecting rod 84. Driven by the shaft 71, the slide cylinders 62 of the main and sub two second drive mechanisms 42 a and 42 b are driven in synchronization with the guide cylinder 61 in the vertical direction. Accordingly, when each slide cylinder 62 is driven in a direction protruding by a handle operation from a state in which the slide cylinder 62 is accommodated in the guide cylinder 61 as shown in FIG. Urged towards. When the leg 67 provided at the lower end of the slide cylinder 62 comes into contact with the traveling ground 22 by projecting the slide cylinder 62 downward, the rear end of the rear deck 31 has two second drive mechanisms 42a. , 42b is supported by the traveling ground 22. When the drive shaft 71 is rotationally driven by the subsequent handle operation, the slide cylinder 62 is supported by the traveling ground 22, so that the guide cylinder 61 moves upward with respect to the slide cylinder 62. The rear deck 31 ascends so that the rear end is lifted with the connecting pin 47 as a fulcrum.

  When the large container 24b is loaded on the semi-trailer 10 as shown by a two-dot chain line in FIG. 1, the rear deck 31 is set at the lower limit position as shown in FIG. The slide cylinders 44a and 41b are accommodated in the guide cylinder 43, and the slide cylinders 62 of the second drive mechanisms 42a and 42b are accommodated in the guide cylinder 61. Even when the semi-trailer travels, the rear deck 31 is positioned at the position shown in FIG. On the other hand, when loading or unloading luggage from the platform into the small container 24a loaded on the semi-trailer 10, the floor surface of the container 24a and the upper surface of the rear deck 31 are substantially flush with each other. In addition, the rear deck 31 is moved upward.

  The upward movement of the rear deck 31 drives the slide cylinders 44 of the first drive mechanisms 41a and 41b so as to protrude from the guide cylinder 43, and moves the slide cylinders 62 of the second drive mechanisms 42a and 42b to the guide cylinders. It is performed by driving so as to protrude from 61. After the slide cylinder 62 of the second drive mechanisms 42a and 42b protrudes with respect to the guide cylinder 61, the guide cylinder 61 is moved to the slide cylinder 62 as described above after the leg portion 67 contacts the traveling ground 22. In this case, the rear deck 31 moves upward with the connecting pin 47 as a fulcrum so that the rear end is lifted. On the other hand, when the slide cylinders 44 of the first drive mechanisms 41a and 41b are projected from the guide cylinder 43, the rear deck 31 has the front end portion with the connecting pin 68 of the leg portion 67 contacting the traveling ground 22 as a fulcrum. Move up as if lifted. When the projecting stroke of the slide cylinders 44 and 62 with respect to the guide cylinders 43 and 61 is set to a predetermined length, the rear deck 31 becomes horizontal and the upper surface of the rear deck 31 is substantially flush with the floor of the container 24a. Is lifted up to

  At the ascending limit position, the rear end portion of the rear deck 31 is directly supported by the traveling ground 22 by the second drive mechanisms 42a and 42b, so that the forklift can be used when unloading the cargo between the container 24a and the platform. Since the load unloading vehicle such as the vehicle runs on the rear deck 31, the load of the load unloading vehicle is partially transmitted to the vehicle by the first drive mechanisms 41a and 41b, but the other load is the second drive. It is directly transmitted to the traveling ground 22 by the mechanisms 42a and 42b. As a result, the load applied to the vehicle is reduced, the support strength of the rear deck 31 is increased, the vibration in the vertical direction of the rear deck 31 due to the traveling of the cargo unloading vehicle is reduced, and the rear deck 31 is stably supported. It is possible to carry out loading and unloading work.

  As described above, since the rear deck 31 can be moved upward by adjusting the extension strokes of the first drive mechanism 41a, 41b and the second drive mechanism 42a, 42b, the rear deck 31 is tilted in the front-rear direction for positioning. can do. When the small container 24 a is loaded on the semi-trailer 10, the rear deck 31 is tilted in the front-rear direction, and the floor surface of the platform and the rear deck 31 are aligned while aligning the floor surface of the small container 24 a and the upper surface of the front end portion of the rear deck 31. It is possible to align with the rear end upper surface.

  As shown in FIG. 1 and FIG. 2, safety handrails 85 are detachably attached to the left and right sides of the rear deck 31 in order to improve the traveling safety of the workers and the cargo loading / unloading vehicle when loading / unloading the cargo. It comes to be installed. The safety handrail 85 is constituted by two gate-shaped safety fences 85a and 85b having the same structure, and each safety fence 85a and 85b has two columns 86 and a horizontal bar 87 connecting them. The lower end of the column 86 of the lower safety fence 85a is inserted into a mounting hole formed in the rear deck 31, and the upper safety fence 85b is inserted into the column 86 of the lower safety fence 85b. Further, as shown in FIG. 1, a foot stop plate 88 is detachably mounted on the left and right sides of the rear deck 31 in order to ensure the safety of workers traveling on the rear deck 31. These safety fences 85a and 85b and the foot stop plate 88 can be attached to the side bumper 23 shown in FIGS.

  When the vehicle travels, as shown in FIGS. 1 and 7, the slide cylinders 62 of the second drive mechanisms 42a and 42b are accommodated inside the guide cylinder 61 and set to the ascending limit position. In this state, in order to prevent the leg portion 67 from vibrating when the vehicle is running, the deck mounting portion 25 is associated with each of the second drive mechanisms 42a and 42b as shown in FIG. A rod-shaped stopper 89 is attached, and a rubber abutting member 90 that contacts the lower end surface of the stopper 89 when the leg portion 67 reaches the ascending limit position by the upward movement of the slide cylinder 62 is attached to the leg portion 67. It has been.

  The loading / unloading operation of the cargo on the container loaded on the semi-trailer 10 described above is performed as follows.

  In order to load and unload a small container 24a loaded on the semi-trailer 10 as shown in FIG. 1, the rear deck 31 needs to be moved up and down. First, the operator rotates the manual handles 59 and 83 attached to the first drive mechanisms 41a and 41b and the second drive mechanisms 42a and 42b, respectively, to extend the slide cylinders 44 and 62. Then, the rear deck 31 is raised in accordance with the extension of the slide cylinders 44 and 62 and adjusted so that the floor surface of the container 24a and the upper surface of the rear deck 31 are substantially flush with each other. In this state, the rear deck 31 is moved by the traveling ground 22 in which the deck mounting portion 25 to which the lower ends of the first drive mechanisms 41a and 41b are fixed and the leg portions 67 of the second drive mechanisms 42a and 42b are in contact with each other. The load is supported. Therefore, the cargo unloading vehicle can smoothly and safely travel from the upper surface of the rear deck 31 to the floor surface of the small container 24a, and the cargo loading / unloading work can be easily performed. In order to ensure safety at this time, safety handrails 85 and foot stopper plates 88 are mounted on the left and right sides of the rear deck.

  On the other hand, in order to unload the large container 24b loaded on the semi-trailer 10 as shown in FIG. 1, the rear deck 31 may be set at the lower limit position as shown in FIGS. There is no need to raise. However, it is necessary to support the load of a cargo unloading vehicle or an operator traveling on the floor surface of the large container 24b with the rear deck 31. Therefore, the operator rotates the manual handle 83 attached to the second drive mechanisms 42 a and 42 b to extend the slide cylinder 62 until the leg portion 67 contacts the traveling ground 22. In this state, the rear deck 31 is moved by the traveling ground 22 in which the deck mounting portion 25 to which the lower ends of the first drive mechanisms 41a and 41b are fixed and the leg portions 67 of the second drive mechanisms 42a and 42b are in contact with each other. The load will be supported. Therefore, the cargo unloading vehicle can safely travel on the floor surface of the large container 24b, and the cargo unloading work can be easily performed.

  FIG. 8 is a schematic view showing a modified example of the second drive mechanisms 42a and 42b. In FIG. 8, members common to the members of the second drive mechanisms 42a and 42b described above are denoted by the same reference numerals. ing. The guide cylinder 61 of one second drive mechanism 42a is provided with a gear case 91. A handle shaft 79 is attached to the gear case 91 so as to be movable in the axial direction, and the handle shaft 79 has a large-diameter drive gear 81a. And a small-diameter drive gear 81b are fixed. An intermediate shaft 92 is rotatably mounted on the gear case 91 in parallel with the drive shaft 71. The intermediate shaft 92 is attached with a small-diameter intermediate gear 93a that is always meshed with a driven gear 82 fixed to the drive shaft 71 and meshes with a large-diameter drive gear 81a when the handle shaft 79 is moved in the axial direction. The intermediate shaft 92 is provided with a large-diameter intermediate gear 93b that meshes with the small-diameter drive gear 81b by moving the handle shaft 79.

  When the large-diameter intermediate gear 93b and the small-diameter drive gear 81b mesh with each other as shown by a solid line in FIG. 8, a low-speed gear train is formed by these gears, and as shown by a two-dot chain line in FIG. When the gear 93a and the large-diameter drive gear 81a mesh with each other, a high-speed gear train is formed by these gears. When the rotation of the handle shaft 79 is transmitted to the feed shaft 74 via the drive shaft 71 by operating the manual handle 83 via the low speed gear train, the rotation of the handle shaft 79 is transmitted to the drive shaft 71 via the high speed gear train. The speed of projecting and moving the slide cylinder 62 from the guide cylinder 61 is slower than when transmitting, but the load applied to the manual handle 83 can be reduced. Thus, when the manual handle 83 is operated to move the slide cylinder 62 downward from the guide cylinder 61 and project the leg 67 until it contacts the traveling ground 22, the handle shaft 79 is moved in the axial direction. Move to engage the drive gear 81a with the intermediate gear 93a. On the other hand, when the guide cylinder 61 is moved upward with respect to the slide cylinder 62 after the leg portion 67 contacts the traveling ground 22, the handle shaft 79 is moved in the axial direction as shown by a solid line in FIG. The drive gear 81b is meshed with the intermediate gear 93b. As a result, the operator applies a smaller load to the manual handle 83 than when the handle is operated with the drive gear 81a and the intermediate gear 93a engaged with each other, and thus the operation of the manual handle 83 is facilitated.

  The two first drive mechanisms 41a and 41b described above are driven by a manual handle 59 provided in one first drive mechanism 41a, and the two second drive mechanisms 42a and 42b are also one of the first drive mechanisms 41a and 41b. 2 is driven by a manual handle 83 provided in the drive mechanism 42a, but without being driven by the manual handles 59, 83, the drive shaft 51, is driven by a fluid pressure motor or an electric motor operated by compressed air or hydraulic pressure. 71 may be driven.

  FIG. 9 is a side view showing a modification of the rear deck 31, and a rear transfer plate 94 is provided at the rear end of the rear deck 31 so as to be rotatable around a hinge 95. As a result, when loading and unloading the cargo in the container 24a, the transfer plate 94 is opened to a position where the leading end of the transfer plate 94 is placed on the platform 39 as shown in FIG. Even if there are gaps or steps between the platform 39 and the platform 94, the transfer plate 94 is bridged between them, so that it is possible to smoothly guide the cargo unloading vehicle between the platform 39 and the rear deck 31. it can. When the transfer plate 94 is closed at the rear end portion of the rear deck 31, a recess 96 into which the transfer plate 94 enters is formed, and the surface of the closed transfer plate 94 substantially coincides with the upper surface of the rear deck 31. It becomes. As a result, the rear end portion of the large container 24b is supported by the entire rear deck 31.

  The rear deck 31 shown in FIG. 9 is provided with a front transfer plate 97 that is rotatable about a hinge 98. As a result, when loading and unloading cargo in the container 24a, the transfer plate 97 is opened to a position where the tip of the transfer plate 97 is placed on the floor surface F of the container 24a as shown in FIG. Even if there is a gap or a step between the rear deck 31 and the floor surface F, the transfer plate 97 is bridged between them. When the transfer plate 97 is closed, a recess 99 into which the transfer plate 97 enters is formed at the front end of the rear deck 31.

  The rear deck 31 shown in FIG. 9 is provided with transfer plates 94 and 97 at the front end portion and the rear end portion, respectively. However, the transfer plate is rotatably provided only at one of the front end portion and the rear end portion. May be. Further, when the entire upper surface of the rear deck 31 is made flat without providing the recesses 96 and 99 on the surface of the rear deck 31 and the respective transfer plates 94 and 97 are closed, the closed transfer plates 94 and 97 are separated from the surface of the rear deck 31. You may make it protrude only by thickness, and in that case, when supporting the large sized container 24a, it is made for the upper surface of the transfer boards 94 and 97 to become substantially the same surface as the upper surface of the container support part 26. Is preferred.

  The present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the scope of the invention. For example, the first drive mechanisms 41a and 41b are attached between the front end portion of the rear deck 31 and the deck mounting portion 25, and the second drive mechanisms 42a and 42b are attached to the rear end portion of the rear deck 31, The first drive mechanism 41a, 41b and the second drive mechanism 42a, 42b only need to be displaced in the front-rear direction of the rear deck 31, and the front-rear relationship between the first drive mechanism 41a, 41b and the second drive mechanism 42a, 42b is the same. In reverse, the first drive mechanisms 41a and 41b are attached between the rear end portion side of the rear deck 31 and the deck mounting portion 25, and the second drive mechanisms 42a and 42b are attached to the front end portion side of the rear deck 31. May be.

It is a side view which shows the semi-trailer for container loading which is one embodiment of this invention. It is a top view of FIG. It is a perspective view which shows schematic structure of a deck mounting part. It is an enlarged side view of a deck mounting part. It is an expanded sectional view showing two 1st drive mechanisms. It is an expanded sectional view showing the 2nd drive mechanism on the left side. FIG. 5 is a rear view of FIG. 4. It is the schematic which shows the modification of a 2nd drive mechanism. It is a side view which shows the modification of a rear deck.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Semi-trailer 11 Vertical beam material 12 Horizontal beam material 13 Main frame 14 Running wheel 15-17 Running axle 18 Gooseneck part 19 Kingpin 21 Support leg 22 Running ground 23 Side bumper 24a Small container 24b Large container 25 Deck mounting part 26 Container support part 27, 28 Crossbar 29 Engagement pin 30 Pedestal 31 Rear deck 32 Frame body 33 Beam material 34 Floor plate 35 Corner portion 36 Rear end surface 37 of the rear deck Rear end surfaces 41a, 41b of the deck mounting portion First drive mechanisms 42a, 42b Drive mechanism 43 Guide cylinder 44 Slide cylinder 45 Sleeve 46 Bracket 47 Connection pin 51 Drive shaft 52 Bearing 53 Support plate 54 Feed shaft 55 Bearing 56 Bevel gear 57 Bevel gear 58 Nut 59 Manual handle 60 Connection rod 61 Guide cylinder 62 Slide Cylindrical body 63 Connecting plate 64 Reinforcing rod 65 Reinforcing rod 66 Sleeve 67 Leg 68 Connecting pin 71 Drive shaft 72 Bearing 73 Support plate 74 Feed shaft 75 Bearing 76 Bevel gear 77 Bevel gear 78 Nut 79 Handle shaft 80 Gear box 81 Drive gear 81a Large diameter drive gear 81b Small-diameter drive gear 82 Driven gear 83 Manual handle 84 Connecting rod 85 Safety handrail 85a, 85b Safety fence 86 86 Post 87 Horizontal bar 88 Foot stop plate 89 Stopper 90 Contact member 91 Gear case 92 Intermediate shaft 93a Small-diameter intermediate gear 93b Large diameter Intermediate gear 94 Rear transfer plate 95 Hinge 96 Recess 97 Front transfer plate 98 Hinge 99 Recess F Floor

Claims (11)

A main frame having a plurality of longitudinal beam members extending in the traveling direction and a plurality of transverse beam members extending in the lateral direction and interconnecting the longitudinal beam members, on which a container is loaded, and a front end portion of the main frame A semi-trailer for container loading in which a king pin connected to the tractor is provided and a traveling wheel is provided on the rear end side,
A deck mounting portion provided at a rear end portion of the main frame;
A container support provided on the front side of the main frame relative to the deck mounting portion;
A rear deck that is mounted on the deck mounting part so as to be movable up and down, and that moves up and guides the cargo unloading vehicle when unloading the luggage into a small container loaded on the container support part;
A guide cylinder that is attached to one of the rear deck and the deck mounting portion, a slide cylinder that is attached to the other and is slidably mounted in the guide cylinder, and is rotatable to the guide cylinder A first drive mechanism that has a feed shaft that is mounted and converts rotation of the drive shaft into a sliding motion of the slide cylinder relative to the guide cylinder, and moves the rear deck up and down relative to the deck mounting portion;
A guide cylinder that is attached to the rear deck while being shifted in the front-rear direction with respect to the first drive mechanism, a slide cylinder that is slidably mounted in the guide cylinder and that has a lower end in contact with the traveling ground, and the guide A feed shaft that is rotatably attached to the cylinder and converts the rotation of the drive shaft into a sliding motion of the slide cylinder relative to the guide cylinder, and moves the rear deck up and down relative to the traveling ground; A semi-trailer for container loading, comprising a drive mechanism.   The semi-trailer for container loading according to claim 1, wherein when a large container having a length longer than that of the small container is loaded on the main frame, the rear deck has a height substantially equal to the upper surface of the container support portion. A semi-trailer for container loading, characterized in that an upper surface is positioned and a rear end portion of the large container is supported by the rear deck.   3. The container-loading semi-trailer according to claim 1, wherein the first drive mechanism is provided on each of the left and right sides of the rear deck, and the drive shafts of the left and right first drive mechanisms are connected to each other. A container-loading semi-trailer characterized in that two drive mechanisms are provided on each of the left and right sides of the rear deck and the drive shafts of the left and right second drive mechanisms are connected to each other.   The container loading semi-trailer according to any one of claims 1 to 3, wherein the drive shafts of the first drive mechanism and the second drive mechanism are rotationally driven by a manual handle. Semi-trailer for container loading.   4. The container-loading semi-trailer according to claim 1, wherein the drive shaft of the second drive mechanism and a handle shaft that is arranged in parallel to the drive shaft and on which a manual handle is mounted. Provided with a low-speed gear train and a high-speed gear train, and the guide cylinder is raised with respect to the slide cylinder after the lower end of the slide cylinder of the second drive mechanism comes into contact with the traveling ground. By operating the manual handle via the low-speed gear train, the load applied to the manual handle can be made smaller than when operating the manual handle via the high-speed gear train. Semi-trailer for container loading.   The container loading semi-trailer according to any one of claims 1 to 3, wherein the drive shafts of the first drive mechanism and the second drive mechanism are driven to rotate by an electric motor or a fluid pressure motor. A semi-trailer for container loading.   The container-loading semi-trailer according to any one of claims 1 to 6, wherein a rear transfer plate is provided at the rear end of the rear deck so as to be freely rotatable, and cargo is loaded into and unloaded from the small container. A container-loading semi-trailer that bridges between the platform and the rear deck by the transfer plate.   The container-loading semi-trailer according to any one of claims 1 to 7, wherein a front transfer plate is rotatably provided at a front end of the rear deck, and when loading and unloading luggage in the small container, A container-loading semi-trailer that bridges between the rear deck and the floor surface of the small container by a transfer plate.   The container-loading semi-trailer according to any one of claims 1 to 8, wherein the slide cylinder of the second drive mechanism is stored in a retracted limit position in the guide cylinder. A container-loading semi-trailer, characterized in that a stopper is provided on the deck mounting portion for contacting a leg portion swingably mounted on a slide cylinder and fixing the leg portion.   The container loading semi-trailer according to any one of claims 1 to 9, wherein a safety fence is provided on the rear deck.   The container loading semi-trailer according to any one of claims 1 to 10, wherein a notch portion is formed in a left and right corner portion of a rear end portion of the rear deck, and a rear end surface of the rear deck and a rear end surface of the rear deck mounting portion. A semi-trailer for container loading, characterized by

Images