JP2013001254A - Vehicle body structure of semi-trailer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicle body structure that enables the inside of the front small container to be confirmed by opening the door on the rear surface of the front small container, even when two small containers are arranged at the front and back and loaded on a semi-trailer.SOLUTION: A distance in a front-back direction from a front bolster 40 at a retracted position to a rear bolster 80 corresponds to a length (first prescribed length) in the front-back direction of a 40 ft container 20, a length in the front-back direction of a 20 ft container 110 is roughly 1/2 of the first prescribed length, and when loading two 20 ft containers 110, the front lower end corner of the front 20 ft container 110F is engaged with a front small size front side fastening device 70 of the front bolster 40 at an advanced position, and the rear lower end corner of the rear 20 ft container 110R is engaged with a rear side dual purpose fastening device 81 of the rear bolster 80. Thus, between the front and rear 20 ft containers 110F and 110R, a space L1 in the front-back direction roughly equivalent to a moving distance from the retracted position to the advanced position of the front bolster 40 is secured.

Description

  The present invention relates to a vehicle body structure of a combined type semi-trailer that can load containers having different lengths in the front-rear direction.

  Patent Document 1 describes a dual-use type semi-trailer that can load either a small container having a length of 20 feet or a large container having a length of 40 feet. The semi-trailer can be loaded with two small containers in the front-rear direction. The front end of the semi-trailer can be engaged with the front lower corner of the large container and the front lower corner of the small container in front. An engagement pin that can be engaged with the rear lower corner of the front small container and an engagement pin that can be engaged with the lower front corner of the rear small container are provided at the front and rear. The rear end portion is provided with a dual-purpose engaging pin that can be engaged with the rear lower corner of the large container and the rear lower corner of the rear small container.

JP 2009-6759 A

  However, as described above, when a 20-foot small container is placed back and forth on a semi-trailer having a length in the front-rear direction adapted to a 40-foot large container, the space between the front and rear small containers (the front small container The space for opening the rear door of the front small container cannot be secured between the rear surface and the front of the rear small container. Can not be confirmed.

  In view of the above situation, the present invention is a vehicle body structure that can open the rear door of the front small container and check the inside even after two small containers are placed on the front and rear of the semi-trailer and loaded. The purpose is to provide.

  In order to achieve the above object, according to the first aspect of the present invention, the first large container whose front and rear lengths are set to the first predetermined length and the second predetermined length longer than the first predetermined length are set. A second large container and a small container set to a third predetermined length which is approximately ½ of the first predetermined length can be selectively loaded, and two containers are arranged side by side in the front and rear. A semi-trailer vehicle body structure that can be loaded in the same way, with a pair of left and right main beams, a front bolster, a front bolster fixing mechanism, a pair of left and right front tightening devices for a large container, a rear bolster, A pair of side clamping devices, a pair of left and right rear compaction devices for a rear small container, a first center bolster, a pair of left and right front compaction devices for a small front container, a second center bolster, and a pair of left and right bolsters Rear small computer Comprising a front clamping device for Na, a.

  The left and right main beams extend opposite to each other in the front-rear direction. The front bolster extends in the vehicle width direction at the front ends of the left and right main beams, and is supported by the left and right main beams so as to be slidable in the front-rear direction. The front bolster fixing mechanism includes a retracted position corresponding to the first large container, and a forward position corresponding to the forward small container disposed in front of the second large container and the two small containers in front of the retracted position. In each, the front bolster is releasably fixed to the left and right main beams. The left and right large container front tightening devices are provided at both ends of the front bolster, releasably engage the front lower end corner of the first large container with the front bolster fixed at the retracted position, and the front bolster. Is releasably engaged with the front lower end corner of the second large container in a state of being fixed at the advanced position. The left and right front small container front side tightening devices are provided at both ends of the front bolster and releasably engage with the front lower end corners of the front small container while the front bolster is fixed at the advanced position. The rear bolster extends in the vehicle width direction at the rear ends of the left and right main beams, and is fixed to the left and right main beams. The left and right rear combined tightening devices are provided at both ends of the rear bolster, and are arranged at the rear lower end corner of the first large container, the bottom side edge of the second large container, and the rear of the two small containers. Engageably engage with the lower corner of the rear small container. The first center bolster extends in the vehicle width direction at an intermediate portion between the left and right main beams, and is fixed to the left and right main beams. The right and left rear tightening devices for the front small containers are provided at both ends of the first center bolster and releasably engage with the rear lower corners of the front small containers. The second center bolster extends in the vehicle width direction at the middle portion of the left and right main beams behind the first center bolster, and is fixed to the left and right main beams. The left and right front small container front side tightening devices are provided at both ends of the second center bolster and releasably engage with the front lower end corners of the rear small container.

  In the above configuration, when the first large container is loaded, the front bolster is set to the retracted position and is fixed to the main beam by the front bolster fixing mechanism before the first large container is loaded. In this state, the first large container is loaded on the semi-trailer, and the large container front tightening device and the rear combined tightening device are respectively engaged with the left and right front lower corners and rear lower corners of the first large container.

  When loading the second large container, the front bolster is set to the forward position before loading, and is fixed to the main beam by the front bolster fixing mechanism. In this state, the second large container is loaded on the semi-trailer, and the large container front tightening device and the rear combined tightening device are engaged with the left and right front lower corners and the bottom side edge of the second large container, respectively.

  When two small containers are loaded, the front bolster is set to the forward position before loading, and is fixed to the main beam by the front bolster fixing mechanism. In this state, the two small containers are arranged at the front and back and loaded on the semi-trailer, and the front small container front tightening device and the front small container rear tightening device are arranged at the front left and right lower and right lower corners of the front small container. The rear small container front tightening device and the rear combined tightening device are respectively engaged with the left and right front lower corners and rear lower corners of the rear small container.

  Thus, the first large container, the second large container, and the two small containers can be selectively loaded on one semi-trailer.

  Further, the distance in the front-rear direction from the front bolster to the rear bolster in the retracted position corresponds to the length in the front-rear direction (first predetermined length) of the first large container, and the length in the front-rear direction of the small container is the first predetermined length. When the two small containers are loaded, the front lower end corner of the front small container is engaged with the front small container front tightening device of the front bolster at the forward movement position. Since the rear lower corner of the rear small container is engaged with the rear side bolster tightening device, the front bolster moves forward from the rear position of the front small container between the rear surface of the front small container and the front surface of the rear small container. A space in the front-rear direction substantially corresponding to the moving distance to the position is secured. Therefore, even after two small containers are arranged on the front and rear of the semi-trailer and loaded, it is possible to open the rear door of the front small container and check the inside.

  As in the first aspect, the second aspect of the present invention can selectively load the first large container, the second large container, and the small container, and the two small containers are two containers. A semi-trailer body structure that can be placed side-by-side and stacked, with a pair of left and right main beams, a front bolster, a front bolster fixing mechanism, and a pair of left and right front tightening devices for large containers A pair of left and right front tightening devices for a small front container, a pair of left and right rear side frames, a rear bolster, a rear side frame fixing mechanism, a rear bolster, a rear combined tightening device, a first center bolster, and left and right 1 A pair of rear tightening devices for the front small container, a second center bolster, and a pair of left and right rear small container front tightening devices. Among these, a pair of left and right main beams, a front bolster, a front bolster fixing mechanism, a pair of left and right large container front tightening devices, a pair of left and right front small container front tightening devices, and a first center The bolster, the pair of left and right front tightening devices for the front small container, the second center bolster, and the pair of left and right front small tightening devices are configured in the same manner as in the first aspect.

  The left and right rear side frames extend in the front-rear direction and are respectively supported by the rear end portions of the left and right main beams so as to be slidable in the front-rear direction. The rear bolster extends in the vehicle width direction and is fixed to the rear ends of the left and right rear side frames. The rear side frame fixing mechanism includes a storage position corresponding to the first large container, and a protruding position corresponding to the rear small container disposed behind the storage position and behind the second large container and the two small containers. In each of these, the rear side frame is releasably fixed to the left and right main beams. The rear bolster extends in the vehicle width direction at the rear ends of the left and right main beams, and is fixed to the left and right main beams. The rear-side tightening device is provided at both ends of the rear bolster, releasably engages with the rear lower end corner of the first large container with the rear side frame fixed in the storage position, and the rear side frame is in the protruding position. In a fixed state, the rear lower end corner of the second large container and the rear lower end corner of the rear small container are releasably engaged.

  In the above configuration, when the first large container is loaded, the front bolster is set to the retracted position and is fixed to the main beam by the front bolster fixing mechanism before the first large container is loaded. Further, the rear side frame is set to the storage position, and the rear side frame is fixed to the main beam by the rear side frame fixing mechanism. In this state, the first large container is loaded on the semi-trailer, and the large container front tightening device and the rear combined tightening device are respectively engaged with the left and right front lower corners and rear lower corners of the first large container.

  When loading the second large container, the front bolster is set to the forward position before loading, and is fixed to the main beam by the front bolster fixing mechanism. Further, the rear side frame is set at the protruding position, and the rear side frame is fixed to the main beam by the rear side frame fixing mechanism. In this state, the second large container is loaded on the semi-trailer, and the large container front and rear tightening devices are respectively engaged with the left and right front lower corners and rear lower corners of the second large container.

  When two small containers are loaded, the front bolster is set to the forward position before loading, and is fixed to the main beam by the front bolster fixing mechanism. Further, the rear side frame is set at the protruding position, and the rear side frame is fixed to the main beam by the rear side frame fixing mechanism. In this state, the two small containers are arranged at the front and back and loaded on the semi-trailer, and the front small container front tightening device and the front small container rear tightening device are arranged at the front left and right lower and right lower corners of the front small container. The rear small container front tightening device and the rear combined tightening device are respectively engaged with the left and right front lower corners and rear lower corners of the rear small container.

  Thus, the first large container, the second large container, and the two small containers can be selectively loaded on one semi-trailer.

  The distance in the front-rear direction from the front bolster in the retracted position to the rear bolster in the state in which the rear side frame is set in the storage position is set corresponding to the length in the front-rear direction (first predetermined length) of the first large container. The length of the small container in the front-rear direction is approximately ½ of the first predetermined length (the third predetermined length). When two small containers are loaded, the front lower corner of the front small container is in the forward position. Because the front lower bolster of the front small bolster is engaged with the front compaction device for the front small container, and the rear lower corner of the rear small container is engaged with the rear combined bolster of the rear bolster with the rear side frame set at the protruding position. Between the rear surface of the front small container and the front surface of the rear small container, the distance from the retracted position of the front bolster to the advanced position and the storage position of the rear side frame Longitudinal space substantially corresponding to the sum distance between the moving distance to the position is secured. Therefore, even after two small containers are arranged on the front and rear of the semi-trailer and loaded, it is possible to open the rear door of the front small container and check the inside. In the second aspect, the space between the rear surface of the front small container and the front surface of the rear small container is increased by the moving distance of the rear side frame as compared with the first aspect. A wider space for opening the door can be secured.

  According to the present invention, even after two small containers are arranged on the front and rear of the semi-trailer and loaded, the rear door of the front small container can be opened to check the inside.

It is a top view which shows the vehicle body structure of the semi-trailer of 1st Embodiment of this invention. FIG. 2 is a side view of FIG. 1, (a) shows a state in which a large container is loaded, and (b) shows a state in which two small containers are loaded. It is the perspective view which looked at the 1st large container and the 2nd large container from the front lower part. It is the perspective view which looked at the 1st large container and the small container from the front lower part. It is a perspective view of the front bolster set to the retreat position. It is a perspective view of the front bolster set to the advance position. It is principal part sectional drawing which looked at the main beam and the front bolster from the front. It is a disassembled perspective view of a front bolster fixing mechanism. It is principal part sectional drawing which looked at the vehicle body structure of FIG. 1 from the front. FIG. 10 is a plan view of FIG. 9. FIG. 10 is a side view of FIG. 9. It is a top view which shows the front side clamping device for large containers, and the front side clamping device for front small containers of a retracted state. It is a side view of FIG. It is a top view which shows the front side clamping device for large containers, and the front side clamping device for front small containers in use. It is a side view of FIG. It is a side view which shows the rear side clamping device for front small containers. FIG. 17 is a plan view of FIG. 16. FIG. 17 is a front view of FIG. 16. It is a front view which shows the front side clamping device for back small containers. FIG. 20 is a plan view of FIG. 19. FIG. 20 is a side view of FIG. 19. It is a perspective view of the rush prevention apparatus set to the protrusion position. It is a side view which shows the vehicle body structure of the semi-trailer of 2nd Embodiment of this invention, (a) shows the state which loaded the large container, (b) shows the state which loaded two small containers, respectively. It is a perspective view of the rear side frame set to the protrusion position. It is a top view of a rear side frame fixing mechanism. FIG. 26 is a front view of FIG. 25.

  A first embodiment of the present invention will be described with reference to the drawings. In each figure, FR indicates the front of the vehicle, UP indicates the upper side, and IN indicates the inner side in the vehicle width direction. In the following description, unless otherwise specified, the left-right direction means the left-right direction with the vehicle facing forward.

  As shown in FIG. 2, the semi-trailer 1 of this embodiment includes a 40 ft container (first large container) 20 whose front and rear length is set to 40 feet (first predetermined length), and 45 feet (second predetermined length). 45ft container (second large container) 30 set to) and 20ft container (small container) 110 set to 20 feet (third predetermined length approximately half of the first predetermined length) The 20ft container 110 is a dual-purpose trailer that can be stacked and can be stacked by stacking two containers side by side, and is pulled by being connected to a tractor (not shown). When two 20ft containers 110 are arranged in the front-rear direction and loaded, the front container is referred to as the front 20ft container 110F, and the rear container is referred to as the rear 20ft container 110R.

  As shown in FIGS. 3 and 4, the 40 ft container 20, the 45 ft container 30, and the 20 ft container 110 are both box-type, and the rear surfaces of the containers 20, 30, 110 are opened and closed in a double-sided manner. It is closed by a door (not shown) that opens the inside of the container. Front corner fittings 21, 31, 111 and rear corner fittings 22, 32, 112 are fixed to the front lower corners and rear lower corners of the containers 20, 30, 110, respectively.

  The front corner fittings 21 and 31 of the 40 ft container 20 and the 45 ft container 30 are provided with engagement holes 23 and 33 opening forward, and the rear corner fittings 22 and 32 are engagement holes opening downward. 24, 34 are provided. Engagement holes 113 and 114 that open downward are provided in the front and rear corner fittings 111 and 112 of the 20ft container 110, respectively. A corner fitting 35 at an intermediate position is fixed to the side edge on the rear bottom side of the 45 ft container 21, and an engagement hole 36 that opens downward similarly to the corner fitting 32 on the rear side is provided in the corner fitting 35. ing.

  The 45 ft container 30 is loaded on the semi-trailer 1 with its front end and rear end protruding a length (2.5 feet) that is substantially equal to the front and rear of the 40 ft container 20 (see FIGS. 2 and 3). In the state of being loaded on the semi-trailer 1, the position of the engagement hole 36 of the corner fitting 35 at the intermediate position of the 45 ft container 30 substantially coincides with the position of the engagement hole 24 of the corner fitting 22 on the rear side of the 40 ft container 20. In addition, a concave tunnel recess for absorbing a step 11 of the main beam 4 described later is provided in the front side portion of each bottom of the 40 ft container 20 and the 45 ft container 30, but in FIGS. 3 and 4, The shape is omitted. On the other hand, no tunnel recess is provided at the bottom of the 20 ft container 110.

  As shown in FIGS. 1 and 2, the vehicle body of the semi-trailer 1 is constituted by a chassis frame 3. The chassis frame 3 includes a pair of left and right main beams 4 extending substantially in parallel along the vehicle front-rear direction, and a plurality of linear cross frames 5 arranged at predetermined intervals in the vehicle front-rear direction and extending in the vehicle width direction. Have The main beam 4 has an I-shaped cross section in which a plate-like upper flange 4a and a lower flange 4b that are spaced apart from each other and are opposed to each other are connected by a web 4c extending vertically (see FIG. 7). Each cross frame 5 is substantially orthogonal to the main frame 4, and both ends of the cross frame 5 are coupled to the main beam 4. Wheels (tires) 6 are attached to the chassis frame 3 via a suspension device 7. In the following description, the cross frame 5 that connects the front ends of the main beams 4 is referred to as a front end cross frame 8.

  A rectangular flat apron plate 9 is fixed to the front ends of the left and right main beams 4. The left and right sides of the apron plate 9 are coupled to the lower flanges 4 b of the left and right main beams 4, and the front end of the apron plate 9 is coupled to the lower part of the front end cross frame 8. Is covered with an apron plate 9.

  A king pin 10 projects from the lower surface of the apron plate 9 at the approximate center in the vehicle width direction. The king pin 10 is releasably connected to a coupler of a tractor that pulls the semi-trailer 1. In addition, in order to arrange the king pin 10 in accordance with the height corresponding to the coupler of the tractor, the front end portion of the main beam 4 is raised by a step 11 commonly called a gooseneck.

  As shown in FIGS. 5 to 11, front bolsters 40 that extend in the vehicle width direction above the apron plate 9 are provided at the front ends of the left and right main beams 4. The front bolster 40 is mounted on the upper flange 4a of the left and right main beams 4 so as to be slidable in the front-rear direction, and the left and right ends of the front bolster 40 extend from the main beams 4 so as to protrude outward in the vehicle width direction. . The front bolster 40 slides back and forth between a retracted position corresponding to the 40 ft container 20 (see FIG. 5) and an advanced position corresponding to the 45 ft container 30 and the forward 20 ft container 110F (see FIG. 6).

  A pair of left and right slide guides 41 are fixed to the front surface of the front bolster 40. Each slide guide 41 stands between the left and right sides of the upper flange 4a of the main beam 4 and extends between the pair of side guide plates 42 facing the front of the front bolster 40 and the front ends of the side guide plates 42. And a front guide plate 43 for connecting the two. The lower part of the side guide plate 42 constitutes a guide part 44 (see FIG. 7) facing the left and right side surfaces of the upper flange 4a of the main beam 4, and the guide part 44 regulates the movement of the front bolster 40 in the left-right direction. To do. The front guide plate 43 slides in contact with the upper surface of the upper flange 4a of the main beam 4 to prevent the front bolster 40 from tilting forward.

  A lock pin housing 45 that protrudes downward from the front bolster 40 and bends substantially in an L shape inward in the vehicle width direction is provided on the outer side in the vehicle width direction of each slide guide 41. The front end portion of the lock pin housing 45 on the inner side in the vehicle width direction constitutes a separation restricting portion 46 (see FIG. 7) extending toward the web 4b on the outer side of the upper flange 4a of the main beam 4 in the vehicle width direction. The detachment restricting portion 46 restricts the upward movement of the front bolster 40 by contacting the upper flange 4a from below.

  A pair of left and right container guides 47 are fixed to the upper and rear surfaces of the front bolster 40. The container guide 47 guides the lower part of the front end of the containers 20, 30, 110F to a predetermined front-rear position when the containers 20, 30, 110F are loaded on the semi-trailer 1.

  Two front and rear circular lock holes 48 and 49 are formed at the front end of the web 4 b of each main beam 4. The rear lock hole 49 is used when the front bolster 40 is fixed at the retracted position and the 40 ft container 20 is loaded, and the front lock hole 48 is fixed at the front bolster 40 at the advanced position and the 45 ft container 30 or Used when loading the front 20ft container 110F.

  A lock pin 50 is provided in the lock pin housing 45 so as to be movable along the vehicle width direction between a lock position and a lock release position. The lock pin 50 in the locked position protrudes inward in the vehicle width direction from the lock pin housing 45 in a state where the front bolster 40 is set to the forward movement position or the backward movement position, and enters and engages with the lock holes 48 and 49, The movement of the bolster 40 in the front-rear direction is restricted. The lock pin 50 at the unlocked position moves outward in the vehicle width direction from the locked position, is detached from the lock holes 48 and 49, and allows the front bolster 40 to move in the front-rear direction.

  The lock pin 50 has a large-diameter portion 51 that enters the lock holes 48 and 49, and a small-diameter portion 52 that extends coaxially from the large-diameter portion 51 outward in the vehicle width direction. The outer end of the narrow diameter portion 52 in the vehicle width direction is inserted through an insertion hole (not shown) of the end wall 45a of the lock pin housing 45 and is connected to the lower ends of the support brackets 53 and 54 outside the lock pin housing 45. (See FIG. 9).

  At one end of the front bolster 40 in the vehicle width direction (left end in FIG. 9), a rotary shaft 55 that is rotatably supported by the front bolster 40 and extends in the front-rear direction, and an operation lever that is connected to the rotary shaft 55 and extends. 56 and a drive side bracket 57 extending integrally from the rotation shaft 55 are provided. The operation lever 56 has an operation position (indicated by a solid line and a two-dot chain line in FIG. 9) that extends outward from the rotation shaft 55 in the vehicle width direction and a storage position (indicated by a broken line in FIG. 9) that extends inward in the vehicle width direction. It is connected to the rotation shaft 55 so as to be movable in the left-right direction so as to be movable between the two. The upper end portion of the drive bracket 57 and the upper end portion of the support bracket 53 on one end side (left side in FIG. 9) are connected by a first link 58, and the upper end portion and the other end side (see FIG. 9 is connected to the upper end of the support bracket 54 on the right side) by a second link 59. The first link 58 and the second link 59 extend substantially in a straight line along the vehicle width direction, and an intermediate portion of the support bracket 54 on the other end side is rotatably supported by the front bolster 40. A coil spring 60 is attached to the outer periphery of the small diameter portion 52 of the lock pin 50. The coil spring 60 is constantly compressed between the large-diameter portion 51 of the lock pin 50 and the end wall 45a of the lock pin housing 45, and biases the lock pin 50 to the lock position.

  When the lock pin 50 is set at the lock position, when the front end side of the operation lever 56 at the operation position is pushed down against the urging force of the coil spring 60, the rotary shaft 55 rotates and the upper end of the drive side bracket 57 is moved. Move to the left in FIG. Accordingly, the first link 58, the support bracket 53 on one end side, and the second link 59 also move to the left side in FIG. 9, and on one end side (left side in FIG. 9), the lock pin is moved along with the movement of the support bracket 53. 50 moves to the unlock position. Further, on the other end side (the right side in FIG. 9), the support bracket 54 rotates about the intermediate portion, and the lock pin 50 moves to the unlock position as the support bracket 54 rotates. That is, by operating one operation lever 56, the left and right lock pins 50 move together from the locked position to the unlocked position.

  The front bolster 40 is provided with a hook 61 for holding a lock and a hook 62 for holding a release. In a state where the lock pin 50 has reached the lock position, the movement and rotation of the lock lever 56 are restricted by engaging the tip of the operation lever 56 at the storage position with the hook 61 for holding the lock. Held in the locked position. Further, when the lock pin 50 reaches the lock release position, the movement and rotation of the lock lever 56 are restricted by engaging the tip end portion of the operation lever 56 at the operation position with the hook 62 for holding the release. The pin 50 is held in the unlocked position.

  By appropriately engaging and releasing the engagement between the lock pin 50 and the lock holes 48 and 49 by the operation of the operation lever 56 and the movement of the front bolster 40, the front bolster 40 is selectively set to the forward position or the backward position. Can be set and fixed. That is, the lock holes 48 and 49 and the lock pin 50 move the front bolster 40 left and right at each of a retracted position corresponding to the 40 ft container 20 and an advanced position corresponding to the 45 ft container 30 in front of the retracted position. A front bolster fixing mechanism 63 that releasably fixes the main beam 4 is configured.

  As shown in FIGS. 5, 6, 9, and 12 to 15, a large container front tightening device (hereinafter referred to as a large front tightening device) 70 is provided at the left and right ends 40 a of the front bolster 40. And a front small tightening device for front small containers (hereinafter referred to as a front small tightening device for front small size) 120 is mounted. The large front side fastening device 70 includes a thread pin 71, a lever 73, and a lever lock plate 74, and is disposed in the hollow interior of the end 40 a of the front bolster 40.

  The thread pin 71 is movable in the front-rear direction between the engagement position and the engagement release position, and is disposed immediately in front of the corner fittings 21 and 31 of the containers 20 and 30 placed on the chassis frame 3. Is done. The thread pin 71 in the engaged position protrudes rearward from the rear surface of the front bolster 40 in a state where the front bolster 40 is set to the retracted position or the advanced position and the 40ft container 20 or the 45ft container 30 is placed on the chassis frame 3. Then, it enters and engages with the engagement holes 23 and 33 of the front corner fittings 21 and 31 to restrict the movement of the containers 20 and 30. The thread pin 71 in the disengagement position moves forward from the engagement position, disengages from the engagement holes 23 and 33, and allows the containers 20 and 30 to move.

  One end of the lever 73 is connected to the rear end portion of the thread pin 71 and extends inward in the vehicle width direction. When the lever 73 is pushed backward, the thread pin 71 moves to the rear engagement position, and when the lever 73 is pulled forward, the thread pin 71 moves to the front engagement release position. A guide plate 76 that stands up in the front-rear direction is fixed to the front bolster 40, and a guide hole (not shown) into which the other end of the lever 73 is inserted is formed in the guide plate 76. The guide hole has an intermediate straight portion extending in the front-rear direction, and a front end portion and a rear end portion extending downward from both front and rear ends of the intermediate straight portion. The lever 73 is allowed to move in the front-rear direction when the other end is located at the intermediate straight portion of the guide hole, and is restricted from moving in the front-rear direction when located at the front end portion and the rear end portion of the guide hole. .

  The lever lock plate 74 is rotatably supported by the front bolster 40, and the other end side of the lever 73 in both the state where the thread pin 71 is set to the engagement position and the state where the thread pin 71 is set to the engagement release position. By engaging, the thread pin 71 is held in the engaged position or the disengaged position.

  In this manner, the left and right thread pins 71 are releasably engaged with the front and lower corners of the 40 ft container 20 in a state where the front bolster 40 is fixed at the retracted position in accordance with the operation of the lever 73. In a state in which is fixed at the forward movement position, the front and lower end corners of the 45 ft container 30 are releasably engaged.

  The front small front tightening device 120 is a rotary retractable twist lock device, and includes a body 121, a twist lock 122, a lever 123, and a lever lock plate 124. The body 121 has a pair of left and right arms 125 extending in the front-rear direction and an upper plate 126 fixed to the arms 125. The arm 125 is supported by the front bolster 40 so as to be rotatable about a rotation shaft 127 along the vehicle width direction, and the front small front fastening device 120 covers the thread pin 71 from above with the rotation shaft 127 as a center. The rotation range of the front small front fastening device 120 can be rotated between the position of use and the front bolster 40 by the contact between the body 121 and the front bolster 40. Regulated between position. In the use position, the upper plate 126 is arranged substantially horizontally to cover the upper portion of the thread pin 71 (see FIG. 15). At the retracted position, the entire front small front fastening device 120 is retracted above the front bolster 40 so that interference with the containers 20 and 30 placed on the main beam 40 does not occur.

  Since the 20ft container 110 does not have a tunnel recess, the lower surface of the front 20ft container 110F placed on the chassis frame 3 is lower than the lower surfaces of the 40ft container 20 and 45ft container 30 placed on the chassis frame 3. The front small front side fastening device 120 located at the upper position and used is disposed immediately below the corner fitting 113 of the front 20ft container 110F placed on the chassis frame 3 to cover the thread pin 71.

  The twist lock 122 has a rectangular cylindrical shape that is long in the front-rear direction, and is fixed to the body 121 and passes through the upper plate 126. In a use state in which the front small front fastening device 120 is set to the use position, the twist lock 122 stands substantially vertically upward. The rotary shaft 128 is inserted into the inner diameter portion of the twist lock 122 while being rotatably supported, and the head portion 122 a of the twist lock 122 is fixed to the upper end of the rotary shaft 128. The head 122a is between an engagement release position (shown by a solid line in FIG. 14) having a long front-rear direction and an engagement position (shown by a two-dot chain line in FIG. 14) rotated by approximately 90 ° from the engagement release position. , Rotate integrally with the rotary shaft 128.

  One end of the lever 123 is connected to the lower end side of the rotating shaft 128 and extends forward at the disengagement position and extends inward in the vehicle width direction at the engagement position. When the other end side of the lever 123 is rotated inward in the vehicle width direction, the head portion 122a of the twist lock 122 rotates to the engagement position, and when rotated in the vehicle width direction outside, the head portion 122a is disengaged. Rotate to position.

  The lever lock plate 124 is rotatably supported with respect to the body 121, and engages with the other end side of the lever 123 in a state where the head 122a of the twist lock 122 is set to the engagement position, thereby 122a is held in the engaged position.

  When the front small front tightening device 120 is set to the use position, the head portion 122a of the twist lock 122 is set to the disengagement position, and the front 20ft container 110F is placed at a predetermined position on the front side of the chassis frame 3, the twist lock The head 122a of 122 enters the engagement hole 113 of the corner fitting 111, and operates the lever 123 to rotate approximately 90 °, thereby reaching the engagement position and engaging with the engagement hole 113. That is, the front small front side tightening device 120 in the use position is releasably engaged with the front lower end corner portion of the front 20ft container 110F.

  As shown in FIG. 1, a first center bolster 130 and a second center bolster 150 that extend in the vehicle width direction are separated in the front-rear direction in the middle portion of the left and right main beams 4 behind the step (gooseneck) 11. And is fixed. Between the first center bolster 130 and the second center bolster 150, a landing plate 149 serving as a scaffold for an operator who opens and closes the rear door of the front 20 ft container 110 </ b> F placed on the main beam 4 is attached to the main beam 4. It is fixed. On the left and right sides of the landing plate 149, steps for raising and lowering the operator are formed.

  As shown in FIGS. 16 to 18, a front small container rear tightening device (hereinafter referred to as a front small rear tightening device) 131 is attached to the left and right ends of the rectangular cylindrical first center bolster 130. ing. The front small rear tightening device 131 is a rotationally raised twist lock device, and includes a body 132, a twist lock 133, a lever 134, and lever lock plates 135 and 136. The body 132 includes a pair of left and right arms 137, and an upper plate 138 and a lower plate 139 that are spaced apart substantially in parallel. The arm 137 is supported on the front surface of the first center bolster 130 so as to be rotatable about the rotation shaft 140 along the vehicle width direction, and the front small rear tightening device 131 has the lower plate 139 centered on the rotation shaft 140. Can be rotated between a use position where the first center bolster 130 is placed on the upper surface of the first center bolster 130 and a storage position rotated approximately 180 ° forward and downward from the use position. Is regulated between the use position and the storage position by the contact between the body 132 and the first center bolster 130. In the use position, the upper plate 138 and the lower plate 139 are disposed substantially horizontally, and the front small rear tightening device 131 is supported from below by the first center bolster 130 (shown by a solid line in FIG. 16). In the retracted position, the entire front small rear tightening device 131 retracts below the upper surface of the main beam 40 so as not to interfere with the lower surfaces of the 40 ft container 20 and the 45 ft container 30 placed on the main beam 40.

  The 20ft container 110 does not have a tunnel recess portion, and a portion of the front 20ft container 110F that is located in front of the step 11 is placed on the front portion of the raised main beam 4, so that the step On the rear side of 11, the front 20 ft container 110 </ b> F is spaced upward from the upper surface of the main beam 4. Therefore, the height of the upper surface of the upper plate 138 of the front small rear tightening device 131 set at the use position is higher than the step 11 so as to contact the front 20ft container 110F and support from below. The distance is set higher than the upper surface of the main beam 4 by a predetermined distance. The height of the upper surface of the first center bolster 130 is set slightly lower than the upper surface of the main beam 4 so that the lower surfaces of the 40 ft container 20 and the 45 ft container 30 do not float from the main beam 4. As described above, the front small rear tightening device 131 in the use position is disposed immediately below the corner metal fitting 112 of the front 20ft container 110F placed on the chassis frame 3, and the rear lower end corner of the rear front 20ft container 110F. The part is supported from below.

  The twist lock 133 has a rectangular cylindrical shape with a long front-rear direction, and is fixed to the body 132 and inserted through the upper plate 138. In the use state in which the front small rear tightening device 131 is set to the use position, the twist lock 133 stands substantially vertically upward. The rotary shaft 141 is inserted into the inner diameter portion of the twist lock 133 while being rotatably supported, and the head 133 a of the twist lock 133 is fixed to the upper end of the rotary shaft 141. The head 133a is between an engagement release position (shown by a solid line in FIG. 17) that is long in the front-rear direction and an engagement position (shown by a two-dot chain line in FIG. 17) that is rotated by approximately 90 ° from the engagement release position. , Rotate integrally with the rotating shaft 141.

  One end of the lever 134 is connected to the lower end side of the rotating shaft 141, and extends rearward at the disengagement position, and extends inward in the vehicle width direction at the engagement position. When the other end side of the lever 134 is operated to rotate inward in the vehicle width direction, the head 133a of the twist lock 133 rotates to the engaged position, and when operated to rotate outward in the vehicle width direction, the head 133a is disengaged. Rotate to position.

  The lever lock plates 135 and 136 are rotatably supported with respect to the body 132, respectively. The lever lock plate 135 holds the head 133a in the engaged position by engaging with the other end of the lever 134 in a state where the head 133a of the twist lock 133 is set in the engaged position. The lever lock plate 136 holds the head 133a in the disengaged position by engaging with the other end of the lever 134 in a state where the head 133a of the twist lock 133 is set in the disengaged position.

  When the front small rear tightening device 131 is set to the use position, the head 133a of the twist lock 133 is set to the disengagement position, and the front 20ft container 110F is placed at a predetermined position on the front side of the chassis frame 3, the twist The head 133a of the lock 133 enters the engagement hole 114 of the corner fitting 112, and operates the lever 134 to rotate approximately 90 °, thereby reaching the engagement position and engaging with the engagement hole 114. That is, the front small rear tightening device 131 in the use position is releasably engaged with the rear lower corner of the front 20ft container 110F.

  As shown in FIGS. 19 to 21, a rear small container front tightening device (hereinafter referred to as a rear small front tightening device) 151 is attached to the left and right ends of the second center bolster 150. The rear compact front tightening device 151 is a retractable twist lock device, and includes a twist lock 153, a lever 154, and lever lock plates 155 and 156. The rear small front tightening device 151 is disposed in the hollow interior of the end portion of the second center bolster 150, immediately below the corner fitting 111 of the rear 20ft container 110R placed on the chassis frame 3.

  The twist lock 153 is supported by the second center bolster 150 so as to be rotatable about a rotary shaft 157 along the front-rear direction, and is used in an upright position about the rotary shaft 157 (shown by a two-dot chain line in FIG. 19). ) And a storage position (indicated by a solid line in FIG. 19) that is rotated approximately 90 ° inward in the vehicle width direction from the use position. The upper plate 150a of the second center bolster 150 is formed with an opening (not shown) that allows the rotational movement of the twist lock 153 between the use position and the storage position. The twist lock 153 at the use position is formed on the upper plate 150a. Projecting upwards and extending upward. The twist lock 153 in the retracted position is retracted below the upper surface of the upper plate 150a so as not to interfere with the lower surfaces of the 40ft container 20 and the 45ft container 30 placed on the main beam 40. A cover 152 that partially opens and closes the opening of the upper plate 150a is rotatably supported by the second center bolster 150. The cover 152 is urged in the closing direction by the coil spring 159 and partially closes the opening to prevent the rotational movement of the twist lock 153 in both the use position and the storage position.

  The twist lock 153 has a rectangular cylindrical shape with a long front-rear direction, and rises substantially vertically upward in the use state set at the use position. A rotary shaft 158 is rotatably inserted in the inner diameter portion of the twist lock 153, and a head 153 a of the twist lock 153 is fixed to the upper end of the rotary shaft 158. The head 153a is between an engagement release position (indicated by a solid line in FIG. 20) that is long in the front-rear direction and an engagement position (indicated by a two-dot chain line in FIG. 20) rotated by approximately 90 ° from the engagement release position. , Rotate integrally with the rotating shaft 158.

  One end of the lever 154 is connected to the lower end side of the rotating shaft 158, and extends inward in the vehicle width direction at the disengagement position and forwards at the engagement position when the twist lock 153 is raised. When the other end of the lever 154 is rotated outward in the vehicle width direction, the head 153a of the twist lock 153 rotates to the engagement position, and when rotated inward in the vehicle width, the head 153a is disengaged. Rotate to position.

  The lever lock plates 155 and 156 are rotatably supported with respect to the second center bolster 150, respectively. The lever lock plate 155 holds the head 153a in the engaged position by engaging with the other end of the lever 154 in a state where the head 153a of the twist lock 153 is set in the engaged position. The lever lock plate 156 holds the head 153a in the disengaged position by engaging with the other end of the lever 154 in a state where the head 153a of the twist lock 153 is set in the disengaged position.

  When the rear small front tightening device 151 (twist lock 153) is set to the use position and the disengagement position, and the rear 20ft container 110R is placed at a predetermined position on the rear side of the chassis frame 3, the head 153a of the twist lock 153 is placed. Enters the engagement hole 113 of the corner fitting 111 and operates the lever 154 to rotate approximately 90 ° to reach the engagement position and engage with the engagement hole 113. That is, the rear small front tightening device 151 in the use position is releasably engaged with the front lower end corner of the rear 20ft container 110R.

  As shown in FIG. 22, a rear bolster 80 extending in the vehicle width direction is fixed to the rear ends of the left and right main beams 4. The left and right ends of the rear bolster 80 extend from the main beams 4 so as to protrude outward in the vehicle width direction, and a rear-side fastening device 81 having a twist lock 82 is mounted in the hollow interiors of the left and right ends. The rear side tightening device 81 is arranged immediately below the corner fittings 22, 35, 112 of the 40ft container 20, 45ft container 30 and rear 20ft container 110R mounted on the chassis frame 3. The head 82a of the twist lock 82 protrudes upward from the upper surface of the rear bolster 80, and when the containers 20, 30, 110R are placed on the chassis frame 3, the engagement holes 24, 36, 114 of the corner brackets 22, 35, 112 are mounted. Is engaged with the engagement holes 24, 36, and 114 by rotating approximately 90 °. That is, the rear combined tightening device 81 releasably engages with the rear lower end corner of the 40 ft container 20, releasably engages with the bottom side edge of the 45 ft container 30, and the rear 20 ft container 110 R Engageably with the bottom corner. Although not shown and described, the rear and side fastening device 81 also includes a lever, a lever lock plate, and the like, similar to the above-described scissor fastening devices 120, 131, and 151.

  At the rear ends of the left and right main beams 4, an intrusion prevention device 83 that extends in the vehicle width direction below the rear bolster 80 is provided. The intrusion prevention device 83 is a frame-like member that prevents a passenger car or the like that has collided from behind, and integrally includes a pair of left and right support arms 84 that extend forward. A pair of left and right support frames 85 extending downward are joined to the rear end portions of the left and right main beams 4, and a frame shape that forms a through hole 86 a penetrating in the front-rear direction at the lower end portion of each support frame 83. A plate portion 86 is provided integrally. When the left and right support arms 84 are inserted through the through holes 86a of the support frame 85, the intrusion prevention device 83 is supported so as to be slidable in the front-rear direction with respect to the main beam 4.

  Between the support arm 84 and the frame-shaped plate portion 86 of the support frame 85, a storage position corresponding to the 40ft container 20 and the rear 20ft container 110R, and a protruding position behind the storage position and corresponding to the 45ft container 30 Are provided with a rush preventing device fixing mechanism 87 for releasably fixing the rush preventing device 83 to the left and right main beams 4 (support frame 85). Since the 45 ft container 30 is loaded in a state of projecting rearward from the rear end of the main beam 4 with respect to the 40 ft container 20 and the rear 20 ft container 110R, when the 40 ft container 20 and the rear 20 ft container 110R are loaded, When the 45 ft container 30 is loaded, the rush preventing device 83 is fixed at the protruding position behind the storage position.

  The intrusion prevention device fixing mechanism 87 includes a frame-side pin insertion hole (not shown) provided in the frame-shaped plate portion 86 of the support frame 85, and an arm-side pin insertion hole (not shown) formed at two front and rear portions formed in the support arm 84. And a lock pin 88 that passes through the pin insertion holes on the frame side and the arm side. The intrusion prevention device 83 is fixed at the storage position by inserting the lock pin 88 through the rear pin insertion hole among the front and rear arm side pin insertion holes, and by inserting the lock pin 88 through the front pin insertion hole. Fixed to the protruding position.

  Each of the tightening devices 70, 81, 120, 131, 151 described above is not limited to the above structure as long as it has a required function.

  According to the present embodiment, when the 40 ft container 20 is loaded, the front bolster 40 is set to the retracted position and is fixed to the main beam 4 by the front bolster fixing mechanism 63 before the loading. In this state, the 40 ft container 20 is loaded on the semi-trailer 1, and the large front side fastening device 70 and the rear side fastening device 81 are engaged with the left and right front lower corners and rear lower corners of the 20 ft container 20, respectively.

  When loading the 45 ft container 30, the front bolster 40 is set to the forward position before loading, and is fixed to the main beam 4 by the front bolster fixing mechanism 63. In this state, the 45 ft container 30 is loaded on the semi-trailer 1, and the large front side fastening device 70 and the rear side fastening device 81 are engaged with the left and right front lower corners and the bottom side edge of the 45 ft container 30, respectively.

  When two 20ft containers 110 are loaded, the front bolster 40 is set to the forward position before loading, and is fixed to the main beam 4 by the front bolster fixing mechanism 63. In this state, the two 20ft containers 110 are arranged on the front and rear and loaded on the semi-trailer 1, and the front small front tightening device 120 and the front small rear tightening device 131 are placed on the left and right front lower corners and the rear of the front 20ft container 110R. The rear small front fastening device 151 and the rear combined fastening device 81 are respectively engaged with the left and right front bottom corners and the rear bottom corner of the rear 20 ft container 110R.

  Thus, the 40 ft container 20, the 45 ft container 30 and the two 20 ft containers 110 can be selectively loaded on one semi-trailer 1.

  The distance in the front-rear direction from the front bolster 40 to the rear bolster 80 in the retracted position corresponds to the length in the front-rear direction of the 40 ft container 20 (first predetermined length (40 feet)), and the length in the front-rear direction of the 20 ft container 110. Is approximately 1/2 of the first predetermined length (third predetermined length (20 feet)), and when two 20ft containers 110 are loaded, the front lower end corner of the front 20ft container 110F Since the rear lower end corner of the rear 20ft container 110R is engaged with the rear and rear tightening device 81 of the rear bolster 80, the rear small front fastening device 120 of the bolster 40 is engaged with the rear side and the rear of the front 20ft container 110F. As shown in FIG. 2 (b), the front bolster 40 is moved from the retracted position to the advanced position between the front surface of the 20ft container 110R. Longitudinal space L1 is ensured which corresponds substantially to the moving distance (about 2.5 feet). Therefore, even after the two 20ft containers 110 are arranged on the front and rear of the semi-trailer 1 and loaded, it is possible to check the inside by opening the rear door of the front 20ft container 110F.

  Next, a second embodiment of the present invention will be described with reference to FIGS.

  In the first embodiment, the rear bolster 83 is fixed to the main frame 4 and the intrusion prevention device 83 is provided to be extendable in the front-rear direction with respect to the main frame 4. In the second embodiment, instead of this, the main bolster 83 is provided. A pair of left and right rear side frames 90 slidably movable in the front-rear direction are provided at the rear end of the frame 4, and a rear bolster 80 and a rush preventing device 83 are fixed to the rear side frame 90. In addition, about the structure which is common in 1st Embodiment, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

  That is, in the present embodiment, the rear end portions of the left and right main beams 4 are formed in a substantially cylindrical shape, and the front end portions of the left and right rear side frames 90 extending in the front-rear direction are inserted therein. 4 is slidably mounted in a telescopic manner. The rear bolster 80 extends in the vehicle width direction and is fixed to the rear end portions of the left and right rear side frames 90. The intrusion prevention device 83 extends in the vehicle width direction below the rear bolster 80 and is fixed to a support frame 91 that extends downward from the rear end portion of the rear side frame 90.

  The rear end portion of the main beam 4 and the rear side frame 90 have a storage position corresponding to the 40 ft container 20 and a protrusion position behind the storage position and corresponding to the 45 ft container 30 and the rear 20 ft container 110R. A rear side frame fixing mechanism 93 that releasably fixes the rear side frame 90 to the left and right main beams 4 is provided.

  The head portion 82 a of the twist lock 82 of the rear-side fastening device 81 protrudes upward from the upper surface of the rear bolster 80. When the rear side frame 90 is fixed in the storage position and the 40 ft container 20 is placed on the chassis frame 3, the head 82a enters the engagement hole 24 of the corner bracket 22 and is engaged by rotating approximately 90 °. Engage with hole 24. Further, when the rear side frame 90 is fixed at the projecting position and the 45 ft container 30 is placed on the chassis frame 3, it enters the engagement hole 34 of the corner bracket 32 and rotates approximately 90 ° to Engage. That is, the rear combined tightening device 81 is releasably engaged with the rear lower end corner of the 40 ft container 20 and releasably engaged with the rear lower end corner of the 45 ft container 30.

  The rear side frame fixing mechanism 93 includes two front and rear pin insertion holes 101 (only one of the front and rear is shown), a pair of left and right lock pin devices 94, an air chamber 95, and a link mechanism 96. The front and rear lock pin insertion holes 101 are formed on the side wall in the vehicle width direction of the rear side frame 90 so as to be separated from each other by a predetermined distance.

  The lock pin device 94 includes a housing 97, a lock pin 98, and a coil spring 99. The housing 97 has a cylindrical shape, and is fixed to the side wall of the main beam 4 on the inner side in the vehicle width direction with the end on the outer side in the vehicle width passing through the main beam 4. The lock pin 98 protrudes from the outer end of the housing 97 in the vehicle width direction into the main beam 4, and the lock release position moves from the lock position inward in the vehicle width direction and does not protrude into the main beam 4. Is supported by the housing 97 so as to be slidable along the vehicle width direction. The coil spring 99 biases the lock pin 98 to the lock position. The tip end of the pin shaft portion 100 extending inward in the vehicle width direction from the lock pin 98 protrudes from the housing 97.

  The rear side frame 90 is fixed to the storage position by inserting the lock pin 98 through the pin insertion hole on the rear side of the front and rear pin insertion holes 101, and the protruding position by inserting the lock pin 98 through the pin insertion hole on the front side. Fixed to.

  The air chamber 95 is disposed substantially at the center in the vehicle width direction, and is fixed to the cross frame 5 via a bracket 107. The drive shaft 102 of the air chamber 95 moves in the front-rear direction, and a long pin-like pin connection hole 103 is formed at the tip thereof. The connecting pin 106 is inserted into the pin connecting hole 103.

  The link mechanism 96 includes a plate-like rotating member 104 that is rotatably supported by the bracket 107, and left and right links 105 that extend in the vehicle width direction. The rotating member 104 integrally includes two link connecting end portions 104a facing each other across the rotation center and an air chamber connecting end portion 104b positioned at an approximately equal distance from the two link connecting end portions. Shape. One end portion (end portion on the outer side in the vehicle width direction) of the link 105 is rotatably connected to the pin shaft portion 100, and the other end portion (end portion on the inner side in the vehicle width direction) is connected to the link connecting end portion 104a of the rotating member 104. Is rotatably connected to. The air chamber connecting end portion 104b of the rotating member 104 is connected to the drive shaft 102 of the air chamber 95 via a connecting pin 106 (pin insertion hole 103).

  In a state where the lock pin 98 protrudes to the lock position, air is discharged from the air chamber 95, and the drive shaft 102 is shortened most (see FIG. 25). When the lock pin 98 is unlocked, air (compressed air) is supplied to the air chamber 95. As a result, the drive shaft 102 extends rearward, the connecting pin 106 is pushed rearward by the front edge of the pin connecting hole 103, and the rotating member 104 rotates clockwise (in the direction of the arrow) in FIG. The link 105 moves inward in the vehicle width direction, and the lock pin 98 moves inward in the vehicle width direction against the urging force of the coil spring 99. When the connecting pin 106 reaches the position indicated by the two-dot chain line in FIG. 25, the lock pin 98 reaches the unlocked position, and the rear side frame 90 is allowed to slide. For example, when the rear side frame 90 in the storage position is moved to the protruding position, air is supplied to the air chamber 95, the lock pin 98 is moved to the unlocking position, and the rear side frame 98 is slightly pulled backward, and then the air chamber Air is discharged from 95. When the air is discharged, the drive shaft 102 is shortened, the connecting pin 106 is positioned in the vicinity of the rear end edge of the pin connecting hole 103, and the lock pin 98 tries to return to the locked position by the urging force of the coil spring 99. Since the pin 98 is disengaged from the pin insertion hole 101, the return of the lock pin 95 to the locked position is prevented by the side wall of the rear side frame 90. In this state, the rear side frame 90 is further pulled out rearward, and when the rear side frame 90 reaches the protruding position, the urging force of the coil spring 99 causes the connecting pin 106 to move forward in the pin connecting hole 103 and the lock pin 98 to the front side. It enters the pin insertion hole 101.

  The front-rear position of the first center bolster 130 is the same as that of the first embodiment, but the front-rear position of the second center bolster 150 is set rearward of the first embodiment by the amount that the rear bolster 80 moves rearward. .

  According to the present embodiment, when the 40 ft container 20 is loaded, the front bolster 40 is set to the retracted position and is fixed to the main beam 4 by the front bolster fixing mechanism 63 before the loading. Further, the rear side frame 90 is set to the storage position, and the rear side frame 90 is fixed to the main beam 4 by the rear side frame fixing mechanism 93. In this state, the 40 ft container 20 is loaded on the semi-trailer 1, and the large front side fastening device 70 and the rear side fastening device 81 are engaged with the left and right front lower corners and rear lower corners of the 40 ft container 20, respectively.

  When loading the 45 ft container 30, the front bolster 40 is set to the forward position before loading, and is fixed to the main beam 4 by the front bolster fixing mechanism 63. Further, the rear side frame 90 is set at the protruding position, and the rear side frame 90 is fixed to the main beam 4 by the rear side frame fixing mechanism 93. In this state, the 45 ft container 30 is loaded on the semi-trailer 1, and the large front side fastening device 70 and the rear side fastening device 81 are engaged with the left and right front lower corners and rear lower corners of the 45 ft container 30, respectively.

  When two 20ft containers 110 are loaded, the front bolster 40 is set to the forward position before loading, and is fixed to the main beam 4 by the front bolster fixing mechanism 63. Further, the rear side frame 90 is set at the protruding position, and the rear side frame 90 is fixed to the main beam 4 by the rear side frame fixing mechanism 93. In this state, the two 20ft containers 110 are arranged at the front and back and loaded on the semi-trailer 1, and the front small front tightening device 120 and the front small rear tightening device 131 are placed on the left and right front lower corners and the rear of the front 20ft container 110F. The rear small front fastening device 151 and the rear combined fastening device 81 are respectively engaged with the left and right front bottom corners and the rear bottom corner of the rear 20 ft container 110R.

  Thus, the 40 ft container 20, the 45 ft container 30 and the two 20 ft containers 110 can be selectively loaded on one semi-trailer 1.

  The distance in the front-rear direction from the front bolster 40 in the retracted position to the rear bolster 80 in the state where the rear side frame 90 is set in the retracted position is the length in the front-rear direction of the 40 ft container 20 (first predetermined length (40 feet)). The length in the front-rear direction of the 20 ft container 110 is approximately ½ of the first predetermined length (third predetermined length (20 feet)), and when two 20 ft containers 110 are loaded, The front lower end corner of the front 20ft container 110F is engaged with the front small front tightening device 120 of the front bolster 40 in the forward position, and the rear lower end corner of the rear 20ft container 110R is set to the protruding position. Since the rear bolster 80 is engaged with the rear-side fastening device 81, the rear surface and the rear surface of the front 20ft container 110F are engaged. As shown in FIG. 23B, the distance between the retracted position of the front bolster 40 and the forward position and the distance of movement of the rear side frame 90 from the retracted position to the protruded position are between the front surface of the 0ft container 110R. A space L2 in the front-rear direction substantially corresponding to the total distance (about 5 feet) is secured. Therefore, even after the two 20ft containers 110 are arranged on the front and rear of the semi-trailer 1 and loaded, it is possible to check the inside by opening the rear door of the front 20ft container 110F.

  In the present embodiment, the space L1 between the rear surface of the front 20ft container 110F and the front surface of the rear 20ft container 110R is increased by the moving distance of the rear side frame 90 as compared with the first embodiment. A wider space for opening the rear door of 110F can be secured.

  In addition, this invention is not limited to the said embodiment, A various change is possible in the range which does not deviate from the summary. For example, the dual type semi-trailer 1 capable of selectively loading the 40 ft container 20 and the 45 ft container 30 has been described, but the length in the front-rear direction is not limited thereto. In addition, a bolster and a tightening device may be additionally provided so that only one 20 ft container 110 can be loaded at substantially the center in the front-rear direction of the semi-trailer 1.

  Further, the front bolster fixing mechanism 63, the intrusion prevention device fixing mechanism 87, and the rear side frame fixing mechanism 93 are not limited to the above shapes and structures as long as they have the required functions.

1: Semi-trailer 3: Chassis frame 4: Main beam 4a: Upper flange 4b: Lower flange 4c: Web 5: Cross frame 6: Tire 7: Suspension device 8: Front end cross frame 9: Apron plate 10: King pin 11: Step ( Gooseneck)
20: 40ft container (first large container)
21, 22, 31, 32, 35, 111, 112: Corner metal fittings 24, 24, 33, 34, 36, 113, 114: Engagement holes 30: 45 ft container (second large container)
40: Front bolster 41: Slide guide 42: Side guide plate 43: Front guide plate 44: Guide part 45: Lock pin housing 46: Detachment restricting part 47: Container guide 48, 49: Lock hole 50: Lock pin 51: Large diameter Portion 52: Small diameter portion 53, 54: Support bracket 55: Rotating shaft 56: Operation lever 57: Drive side bracket 58: First link 59: Second link 60: Coil spring 61, 62: Hook 63: Front bolster fixing mechanism 70 : Front side fastening device 71: Thread pin 73: Lever 74: Lever lock plate 80: Rear bolster 81: Rear side fastening device 82: Twist lock 82a: Head 83: Intrusion prevention device 84: Support arm 85: Support frame 86: Frame -Shaped plate part 86a: through-hole 87: rush prevention Device fixing mechanism 88: Lock pin 90: Rear side frame 93: Rear side frame fixing mechanism 94: Lock pin device 95: Air chamber 96: Link mechanism 97: Housing 98: Lock pin 99: Coil spring 100: Pin shaft portion 101: Pin insertion hole 102: Drive shaft 103: Pin connection hole 104: Rotating member 105: Link 106: Connection pin 107: Bracket 110: 20ft container (small container)
120: Front compaction device for front small size (front tightening device for small front container)
122: Twist lock 130: First center bolster 131: Rear tightening device for front small container (rear tightening device for front small size)
133: Twist lock 150: Second center bolster 151 1: Front tightening device for rear small container (front tightening device for rear small size)
153: Twist lock

Claims (2)

A first large container whose front and rear lengths are set to a first predetermined length, a second large container set to a second predetermined length longer than the first predetermined length, and approximately 1 / of the first predetermined length. 2 can be selectively loaded with a small container set to a third predetermined length, and the small container has a vehicle body structure of a semi-trailer that can be stacked by stacking two containers side by side. There,
A pair of left and right main beams extending opposite to each other in the front-rear direction;
A front bolster that extends in the vehicle width direction at the front end of the left and right main beams and is supported by the left and right main beams so as to be slidable in the front-rear direction;
Each of a retreat position corresponding to the first large container and a forward position corresponding to a front small container disposed in front of the second large container and the two small containers in front of the retreat position. A front bolster fixing mechanism for releasably fixing the front bolster to the left and right main beams;
Provided at both ends of the front bolster, the front bolster is releasably engaged with the front lower end corner of the first large container with the front bolster fixed at the retracted position, and the front bolster is at the advanced position. A pair of left and right large container front tightening devices releasably engaged with a front lower end corner of the second large container in a fixed state;
A pair of left and right front tightening devices for a front small container that are provided at both ends of the front bolster and releasably engage with the front lower end corner of the front small container in a state where the front bolster is fixed at the forward position. When,
A rear bolster that extends in the vehicle width direction at the rear ends of the left and right main beams and is fixed to the left and right main beams;
A rear small container provided at both ends of the rear bolster, arranged at the rear lower corner of the first large container, a side edge on the bottom side of the second large container, and the rear small container; A pair of left and right rear-side tightening devices that releasably engage with the rear lower end corner,
A first center bolster that extends in the vehicle width direction at an intermediate portion of the left and right main beams and is fixed to the left and right main beams;
A pair of left and right front tightening devices for the front small container, which are provided at both ends of the first center bolster and releasably engage with a rear lower end corner of the front small container;
A second center bolster that extends in the vehicle width direction at an intermediate portion of the left and right main beams behind the first center bolster and is fixed to the left and right main beams;
A semi-trailer comprising a pair of left and right rear small container front tightening devices provided at both ends of the second center bolster and releasably engaged with a front lower end corner of the rear small container. Car body structure. A first large container whose front and rear lengths are set to a first predetermined length, a second large container set to a second predetermined length longer than the first predetermined length, and approximately 1 / of the first predetermined length. 2 can be selectively loaded with a small container set to a third predetermined length, and the small container has a vehicle body structure of a semi-trailer that can be stacked by stacking two containers side by side. There,
A pair of left and right main beams extending opposite to each other in the front-rear direction;
A front bolster that extends in the vehicle width direction at the front end of the left and right main beams and is supported by the left and right main beams so as to be slidable in the front-rear direction;
Each of a retreat position corresponding to the first large container and a forward position corresponding to a front small container disposed in front of the second large container and the two small containers in front of the retreat position. A front bolster fixing mechanism for releasably fixing the front bolster to the left and right main beams;
Provided at both ends of the front bolster, the front bolster is releasably engaged with the front lower end corner of the first large container with the front bolster fixed at the retracted position, and the front bolster is at the advanced position. A pair of left and right large container front tightening devices releasably engaged with a front lower end corner of the second large container in a fixed state;
A pair of left and right front tightening devices for a front small container that are provided at both ends of the front bolster and releasably engage with the front lower end corner of the front small container in a state where the front bolster is fixed at the forward position. When,
A pair of left and right rear side frames that extend in the front-rear direction and are supported by the rear ends of the left and right main beams so as to be slidable in the front-rear direction;
A rear bolster extending in the vehicle width direction and fixed to rear end portions of the left and right rear side frames;
A storage position corresponding to the first large container, and a protruding position corresponding to a rear small container disposed behind the second large container and the two small containers behind the storage position. A rear side frame fixing mechanism for releasably fixing the rear side frame to the left and right main beams;
A rear bolster that extends in the vehicle width direction at the rear ends of the left and right main beams and is fixed to the left and right main beams;
Provided at both ends of the rear bolster, the rear side frame is releasably engaged with the rear lower corner of the first large container with the rear side frame fixed at the storage position, and the rear side frame is fixed at the protruding position. A pair of left and right rear-side tightening devices releasably engaged with the rear lower end corner of the second large container and the rear lower end corner of the rear small container in a state of being
A first center bolster that extends in the vehicle width direction at an intermediate portion of the left and right main beams and is fixed to the left and right main beams;
A pair of left and right front tightening devices for the front small container, which are provided at both ends of the first center bolster and releasably engage with a rear lower end corner of the front small container;
A second center bolster that extends in the vehicle width direction at an intermediate portion of the left and right main beams behind the first center bolster and is fixed to the left and right main beams;
A semi-trailer comprising a pair of left and right rear small container front tightening devices provided at both ends of the second center bolster and releasably engaged with a front lower end corner of the rear small container. Car body structure.

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