JP5553311B2 - Semi-trailer body structure - Google Patents

Description

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

  Patent Document 1 describes a combined type semi-trailer that can load either a standard container having a length of 40 feet or a long container having a length of 45 feet. A front side fastening frame that can move forward and backward between a retracted position for fastening the standard container and a protruding position for fastening the long container is provided at the tip of the trailer body of the semi-trailer. The front fastening frame has two sliding rods that are slidably mounted on the vertical beam member of the trailer body, and a front horizontal bar member that is attached to the tip of each sliding rod. doing. Removable front fasteners that engage with the front engagement holes of the container are provided at both ends of the front horizontal bar, and the front fasteners protrude rearward from both ends of the front horizontal bar. Fasten the tip. The two sliding rods have front through-holes corresponding to the retracted position and the projecting position, and the front fastening frame is selected between the retracted position and the projecting position by passing the fixing pin through the front through-hole. Fixed.

  Further, a king pin for connecting to the tractor is provided at the front end portion of the trailer body, and a coupler provided at the rear end portion of the tractor and a king pin of the trailer are connected to pull the trailer to the tractor.

JP 2009-96329 A

  In general, an apron plate is fixed to the front end of the trailer body, and a king pin projects downward from the lower surface of the apron plate. The apron plate covers the front end portion of the trailer body from below, and when connecting the tractor and the semi-trailer, the coupler slides on the lower surface of the apron plate and reaches the king pin. When such an apron plate is applied to the structure of Patent Document 1, the apron plate is arranged in accordance with the front fastening frame in the retracted position.

  However, in the structure of Patent Document 1, the front side fastening frame is composed of left and right sliding rods that are slidably mounted on the longitudinal beam member of the trailer body, and a front side bar member that connects the tips of the sliding rods. Since it is comprised, if a front side fastening frame is fixed to a protruding position, a front side fastening frame will be arrange | positioned ahead of an apron plate, and an opening part will be formed between the sliding rods ahead of an apron plate. When such an opening portion is formed, when connecting the tractor and the semi-trailer, there is a possibility that the Cabra may enter the opening portion and not reach the king pin, or the coupler may be damaged. In order to avoid such inconvenience, it is necessary to move the front fastening frame at the protruding position to the retracted position at the time of connection, which causes complicated operations.

  In view of the above situation, the present invention is a combined type semi-trailer capable of loading two types of containers having different lengths in the front-rear direction, regardless of the length of the container loaded. It aims at providing the vehicle body structure which can perform smoothly.

  In order to achieve the above object, according to the first aspect of the present invention, the first standard container whose front and rear length is set to the first predetermined length and the second predetermined length longer than the first predetermined length are set. A semi-trailer body structure that can be selectively loaded with a second standard container, with a pair of left and right main beams, an apron plate, a kingpin, a front bolster, a front bolster fixing mechanism, and left and right 1 A pair of front tightening devices.

The left and right main beams extend opposite to each other in the front-rear direction. The apron plate has both side portions fixed to the front end portions of the left and right main beams, and covers between the front end portions of the left and right main beams. The king pin protrudes from the lower surface of the apron plate and is releasably connected to the coupler of the tractor that pulls the semi-trailer. The front bolster extends in the vehicle width direction above the apron plate, 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 can release the front bolster to the left and right main beams at the retracted position corresponding to the first standard container and the forward position corresponding to the second standard container in front of the retracted position. Fix it. The left and right front tightening devices are provided at both ends of the front bolster, releasably engage with the front lower end corner of the first standard container with the front bolster fixed at the retracted position, and the front bolster is in the advanced position. In a state of being fixed to the front, the front lower end corner of the second standard container is releasably engaged.
The left and right main beams each have an I-shaped cross section in which plate-like upper flanges and lower flanges that are spaced apart from each other and are opposed to each other are connected by a web extending vertically. The front bolster is a pair of side guide plates that extend from the front surface of the front bolster opposite to each other while standing on both the left and right sides of the upper flange, a front guide plate that connects the front ends of the side plates, A left and right detachment restricting portion extending toward the web on the outer side in the vehicle width direction is provided. The front guide plate contacts the upper surface of the upper flange to prevent the front bolster from tilting forward, and the lower part of the pair of side guide plates faces the left and right sides of the upper flange in the left-right direction of the front bolster. The detachment restricting portion restricts the upward movement of the front bolster by contacting the upper flange from below.

  In the above configuration, when loading the first standard container, the front bolster is set to the retracted position, and when loading the second standard container, the front bolster is set to the forward position, and the front bolster is fixed at each position. The front bolster is fixed to the main beam by the mechanism. Since the front bolster moves above the apron plate between the retracted position and the advanced position, when the front bolster is fixed at any position, when connecting the tractor and the semi-trailer, The coupler slides on the lower surface of the apron plate and reliably reaches the king pin. Therefore, even if the front bolster is fixed at any position, the tractor and the semi-trailer can be smoothly connected.

In the above configuration, the movement of the front bolster is guided along the extending direction of the upper flange by the lower portion of the side guide plate . Further, the upward movement of the front bolster is regulated by the separation regulating unit. Therefore, the front bolster can be smoothly moved between the retracted position and the advanced position.
A second aspect of the present invention is the vehicle body structure of the semi-trailer according to the first aspect, wherein the front bolster fixing mechanism is engaged with the front and rear lock holes formed in the left and right main beam webs, and the lock holes. Left and right lock pins that are movable between a lock position to be released and a lock release position to be removed from the lock hole. The front bolster is provided with a link member for moving the left and right lock pins in an interlocking manner between the lock position and the unlock position, and the link member is disposed inside the front bolster and extends in the vehicle width direction. .

  According to a third aspect of the present invention, there is provided a semi-trailer vehicle body structure according to the first or second aspect, wherein a rear bolster, a pair of left and right rear side tightening devices, a rush preventing device, and a rush preventing device fixing mechanism are provided. Is further provided.

  The rear bolster extends in the vehicle width direction and is fixed to the rear ends of the left and right main beams. The left and right rear tightening devices are provided at both ends of the rear bolster, releasably engage with the rear lower end corner of the first standard container, and releasably engage with the bottom side edge of the second standard container. Match. The inrush prevention device extends in the vehicle width direction below the rear bolster, and is supported so as to be slidable in the front-rear direction with respect to the left and right main beams. The intrusion prevention device fixing mechanism is configured to move the intrusion prevention device to the left and right main beams at a storage position corresponding to the first standard container and a protrusion position behind the storage position and corresponding to the second standard container. And fix it so that it can be released.

  In the above configuration, when loading the first standard container, the rush prevention device is set to the storage position, and when loading the second standard container, the rush prevention device is set to the protruding position, and the rush prevention device is set at each position. The rush prevention device is fixed to the main beam by the prevention device fixing mechanism.

  According to a fourth aspect of the present invention, there is provided a semi-trailer vehicle body structure according to the first or second aspect, wherein a pair of left and right rear side frames, a rear bolster, a rear side frame fixing mechanism, and a pair of left and right rear fastening devices. And a rush prevention device.

  The pair of 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 releases the rear side frame with respect to the left and right main beams at the storage position corresponding to the first standard container and the projecting position behind the storage position and corresponding to the second standard container. Fix it as possible. The left and right rear tightening devices are provided at both ends of the rear bolster, releasably engage with the rear lower end corner of the first standard container with the rear side frame fixed at the storage position, and the rear side frame protrudes. In a state of being fixed to the second standard container, the rear lower end corner of the second standard container is releasably engaged. The inrush prevention device extends in the vehicle width direction below the rear bolster and is supported by the left and right rear side frames.

  In the above configuration, when loading the first standard container, the rear side frame is set to the storage position, and when loading the second standard container, the rear side frame is set to the protruding position, and the rear side frame is fixed at each position. The rear side frame is fixed to the main beam by the mechanism.

  According to the present invention, in a combined type semi-trailer capable of loading two types of containers having different lengths in the front-rear direction, even when a container of any length is loaded, the connection with the tractor is smoothly performed. It can be carried out.

It is a top view which shows the vehicle body structure of the semi-trailer of 1st Embodiment of this invention. It is a side view of FIG. It is the perspective view which looked at the 1st standard container and the 2nd standard 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. It is a top view of FIG. It is a side view of FIG. It is a top view of a front side fastening device. It is a front view of FIG. It is a side view of FIG. 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. 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. It is a front view of FIG.

  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 standard container) 20 whose front and rear length is set to 40 feet (first predetermined length), and 45 feet (second predetermined length). ) And a 45ft container (second standard container) 30 set to the same type, which can be selectively loaded, and is pulled by being connected to a tractor (not shown).

As shown in FIG. 3, both the 40 ft container 20 and the 45 ft container 30 are box-type, and the front corner fittings 21, 31 are provided at the front lower end corner and the rear lower end corner of each container 20, 30. And the rear corner fittings 22 and 32 are fixed, respectively. The front corner fittings 21 and 31 are provided with engagement holes 23 and 33 that open forward, and the rear corner fittings 22 and 32 are provided with engagement holes 24 and 34 that open downward. . A corner fitting 35 at an intermediate position is fixed to the side edge on the rear bottom side of the 45 ft container 30 , 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, although the bottom part of each container 20 and 30 has a shape corresponding to the level | step difference 11 of the main beam 4 mentioned later, the shape is abbreviate | omitted in FIG.

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 opposed to each other in the vertical direction are connected by a web 4c extending vertically (see FIG. 6). Each cross frame 5, substantially perpendicular to the main beam 4, both ends of the cross frame 5 is 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. 4 to 13, a front bolster 40 that extends in the vehicle width direction above the apron plate 9 is 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. 4) and an advanced position corresponding to the 45 ft container 30 (see FIG. 5).

  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 portion of the side guide plate 42 constitutes a guide portion 44 (see FIG. 6) that faces the left and right side surfaces of the upper flange 4a of the main beam 4, and the guide portion 44 restricts 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. Inboard of the distal end portion of the lock pin housing 45 constitute a disengagement restricting portion 46 (see FIG. 6) extending toward the web 4 c in the vehicle width direction outer side of the upper flange 4a of the main beam 4. 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 portions of the front ends of the containers 20 and 30 to a predetermined front and rear position when the containers 20 and 30 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 c of each main beam 4. The rear side lock hole 49 is used when the 40 ft container 20 is loaded with the front bolster 40 fixed at the retracted position, and the front side lock hole 48 is fixed at the front bolster 40 at the advanced position to fix the 45 ft container 30 . Used when loading.

  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. 8).

  At one end of the front bolster 40 in the vehicle width direction (left end in FIG. 8), there is a rotating shaft 55 that is rotatably supported by the front bolster 40 and extends in the front-rear direction, and an operating lever that is connected to the rotating 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. 8) that extends outward from the rotation shaft 55 in the vehicle width direction and a storage position (indicated by a broken line in FIG. 8) 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 side bracket 57 and the upper end portion of the support bracket 53 on one end side (left side in FIG. 8) are connected by a first link 58, and the upper end portion of the support bracket 53 on one end side and the other end side (see FIG. 8 is connected to the upper end portion of the support bracket 54 by the 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. As a result, 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. 8, and on one end side (left side in FIG. 8), 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. 8), the support bracket 54 rotates around 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 operation lever 56 are restricted by engaging the distal end portion of the operation lever 56 at the storage position with the hook 61 for holding the lock. Held in the locked position. In addition, when the lock pin 50 has reached the unlocking position, the movement and rotation of the operating lever 56 are restricted by engaging the distal end portion of the operating lever 56 at the operating position with the release holding hook 62. 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.

  Front tightening devices 70 are mounted in the hollow interiors of the left and right ends of the front bolster 40. The front side tightening device 70 includes a thread pin 71, a pin support tube member 72, a lever 73, and an engagement holding plate 74.

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. Thread pins 71 of the engagement release position, moves from the engagement position to the forward, disengaged from the engaging hole 2 3, 3 3, allows movement of the container 20, 30.

The pin support tube member 72 is fixed to the front bolster 40 and supports the middle portion of the thread pin 71 so as to be slidable in the front-rear direction. The intermediate portion of the thread pin 71 is inserted through the inner diameter portion of the pin support tube member 72. Thread pin 71 includes a stopper pin 75 projecting above and below in front of the pin support tube member 72, it is provided with front plate portion 76 that protrudes from the front end of the thread pin 71 in the vertical direction in front of the stopper pins 7 5 Yes. When the stopper pin 75 abuts the front end surface of the pin support tube member 72 in the vertical direction, the maximum protrusion amount of the thread pin 71 to the front is defined.

  A lever support bracket 77 is fixed to the front bolster 40, and an intermediate portion of the lever 73 is supported by the lever support bracket 77 so as to be rotatable about a rotation shaft 78. One end of the lever 73 is substantially U-shaped having upper and lower opposing plates 73 a, and these upper and lower opposing plates 73 a are disposed between the stopper pin 75 of the thread pin 71 and the front plate portion 76. When the other end side of the lever 73 is rotated forward, the one end side of the lever 73 rotates rearward, pushes the stopper pin 75 rearward, and moves the thread pin 71 to the engagement position. On the other hand, when the other end side of the lever 73 is rotated backward, the one end side of the lever 73 rotates forward, pushes the front plate portion 76 forward, and moves the thread pin 71 to the disengagement position.

  In the state where the thread pin 71 is set to the engagement position, the engagement holding plate 74 has a lock position that is closely opposed in front of the front plate portion 76, and a lock release position that is disengaged from the front of the front plate portion 76. The bolster 40 is supported by the front bolster 40 so as to be freely rotatable. The engagement holding plate 74 in the locked position abuts on the front plate portion 76, thereby preventing the thread pin 71 from moving from the locked position to the unlocked position.

  The front bolster 40 is fixed with a leaf spring 79 that is elastically deformed by abutting a stopper pin 75 that moves forward toward the lock position. The leaf spring 79 relieves the collision between the stopper pin 75 and the pin support tube member 72 and gives a moderation feeling when the lever 73 is rotationally moved to the lock position.

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

  The front side fastening device 70 is not limited to the above structure as long as it has a required function.

  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 rear tightening devices 81 having twist locks 82 are mounted in the hollow interiors of the left and right ends. The rear tightening device 81 is arranged immediately below the corner fittings 22 and 35 of the containers 20 and 30 placed on the chassis frame 3. The head portion 82a of the twist lock 82 protrudes upward from the upper surface of the rear bolster 80. When the containers 20 and 30 are placed on the chassis frame 3, the head portions 82a enter the engagement holes 24 and 36 of the corner fittings 22 and 35, respectively. Engage with the engagement holes 24 and 36 by rotating. That is, the rear side tightening device 81 is releasably engaged with the rear lower end corner of the 40 ft container 20 and removably engaged with the side edge on the bottom side of the 45 ft container 30. Although not illustrated and described, the rear tightening device 81 also includes an operation lever for rotating the twist lock 82 and a link for interlocking the left and right twist locks 82, similar to the front tightening device 70.

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. The rear end portions of the left and right of the main beam 4, the support frame 85 of the left and right pair extending downward are respectively joined, at the lower end of the support frame 8. 5, a through hole 86a penetrating in the front-rear direction frame A plate-like plate portion 86 is integrally provided. 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, at each of the storage position corresponding to the 40ft container 20 and the protruding position corresponding to the 45ft container 30 behind the storage position. 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) is provided. Since the 45 ft container 30 is loaded in a state of projecting rearward from the rear end of the main beam 4 relative to the 40 ft container 20, when loading the 40 ft container 20 , the rush prevention device 83 is fixed to the accommodation position, When the container 30 is loaded, the rush preventing device 83 is fixed at a protruding position behind the storage position.

Inrush prevention device fixing mechanism 87 includes a frame-side pin insertion hole which penetrates the frame-like plate portion 86 of the support frame 85 in the lateral direction (not shown), the arm-side pin insertion hole of the front and rear two portions which are formed in the support arm 84 (Not shown) 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.

  According to this embodiment, when loading the 40 ft container 20, the front bolster 40 is set to the retracted position, and when loading the 45 ft container 30, the front bolster 40 is set to the advanced position. The front bolster 40 is fixed to the main beam 4 by the front bolster fixing mechanism 63.

  Further, when loading the 40 ft container 20, the rush preventing device 83 is set to the storage position, and when loading the 45 ft container 30, the rush preventing device 83 is set to the protruding position, and the rush preventing device is set at each position. The rush preventing device 83 is fixed to the main beam 4 by the fixing mechanism 87.

  Since the front bolster 40 moves above the apron plate 9 between the retracted position and the advanced position, the tractor and the semi-trailer 1 are connected to each other regardless of the position of the front bolster 40. When doing so, the coupler slides on the lower surface of the apron plate 9 and reliably reaches the king pin 10. Therefore, even if the front bolster 40 is fixed at any position, the tractor and the semi-trailer 1 can be smoothly connected.

  Further, the movement of the front bolster 40 is guided along the extending direction of the upper flange 4 a by the guide portion 44, and the upward movement of the front bolster 40 is restricted by the separation restricting portion 46. Therefore, the front bolster 40 can be smoothly moved between the retracted position and the advanced position.

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

In the first embodiment, fixing a Riyaborusuta 8 0 on the main beam 4, is provided telescopically in the longitudinal direction of the rush prevention apparatus 83 to the main beam 4, in the second embodiment, instead of this, 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 main beam 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 frame of the main beam 4 and the rear side frame 90 are provided with left and right rear side frames 90 at the storage position corresponding to the 40 ft container 20 and the protruding position corresponding to the 45 ft container 30 behind the storage position. A rear side frame fixing mechanism 93 that is releasably fixed to the main beam 4 is provided.

  The head 82 a of the twist lock 82 of the rear tightening 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 side tightening device 81 releasably engages with the rear lower end corner of the 40 ft container 20 and releasably engages 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 104b of the rotating member 104 is connected to the drive shaft 102 of the air chamber 95 via a connecting pin 106 (pin connecting 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. 17). When the lock pin 98 is unlocked, air (compressed air) is supplied to the air chamber 95. Thereby, the drive shaft 102 extends rearward, the connecting pin 106 is pushed rearward by the front end 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. 17, the lock pin 98 reaches the unlocking position, and the rear side frame 90 is allowed to slide. For example, when moving the rear side frame 90 of the storage position to the extended position, air is supplied to the air chamber 95 to move the lock pin 98 to the unlocked position, after pulled out slightly to the rear side frames 9 0 backward, Air Air is exhausted from the chamber 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, returning to the lock position of the locking pin 9 8 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.

In the present embodiment, when loading the 40 ft container 20, the rear side frame 90 is set to the storage position, and when loading the 45 ft container 30, the rear side frame 90 is set to the protruding position. The rear side frame 90 is fixed to the main beam 4 by the fixing mechanism 93.

  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. Further, a bolster and a tightening device may be additionally provided so that two containers having a length of 20 feet in the front-rear direction can be loaded.

  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 standard container)
21, 22: Corner metal fittings 2 3 , 24: Engagement holes 30: 45 ft container (second standard container)
31, 32, 35: Corner metal fittings 33, 34, 36: Engagement hole 40: Front bolster 41: Slide guide 42: Side guide plate 43: Front guide plate 44: Guide portion 45: Lock pin housing 46: Detachment restricting portion 47 : Container guide 48, 49: Lock hole 50: Lock pin 51: Large diameter part 52: Small diameter part 53, 54: Support bracket 55: Rotating shaft 56: Operation lever 57: Drive side bracket 58: First link 59: First 2-link 60: Coil spring 61, 62: Hook 63: Front bolster fixing mechanism 70: Front side tightening device 71: Thread pin 72: Pin support tube member 73: Lever 73a: Opposing plate 74: Engagement holding plate 75: Stopper pin 76: Front plate 77: Lever support bracket 78: Rotating shaft 79: Leaf spring 80: Rear bolt Star 81: Rear side tightening device 82: Twist lock 82a: Head 83: Entry prevention device 84: Support arm 85: Support frame 86: Frame-like plate portion 86a: Through hole 87: Entry 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: Connecting pin 107: Bracket

Claims (4)

A combined type capable of selectively stacking a first standard container having a front and rear length set to a first predetermined length and a second standard container set to a second predetermined length longer than the first predetermined length Semi-trailer body structure,
A pair of left and right main beams extending opposite to each other in the front-rear direction;
An apron plate having both side portions fixed to the front end portions of the left and right main beams and covering between the front end portions of the left and right main beams;
A king pin that protrudes from the lower surface of the apron plate and is releasably connected to a coupler of a tractor that pulls the semi-trailer;
A front bolster that extends in the vehicle width direction above the apron plate and is supported by the left and right main beams to be slidable in the front-rear direction;
The front bolster is releasably fixed to the left and right main beams at each of a retracted position corresponding to the first standard container and an advanced position corresponding to the second standard container in front of the retracted position. A front bolster fixing mechanism to
Provided at both ends of the front bolster, the front bolster is releasably engaged with the front lower end corner of the first standard 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 front tightening devices that releasably engage with the front lower end corner of the second standard container in a fixed state ,
The left and right main beams each have an I-shaped cross section in which a plate-like upper flange and a lower flange that are spaced apart from each other and are opposed to each other are connected by a web extending vertically.
The front bolster includes a pair of side guide plates that extend from the front surface of the front bolster in a state of standing on both the left and right sides of the upper flange, and a front guide plate that connects between the front ends of the side plates. , And a left and right detachment restricting portion extending toward the web on the outer side in the vehicle width direction of the upper flange,
The front guide plate is in contact with the upper surface of the upper flange to prevent the front bolster from tilting forward, and the lower portions of the pair of side guide plates are opposed to the left and right side surfaces of the upper flange. A body structure of a semi-trailer , wherein the movement of the front bolster in the left-right direction is restricted, and the detachment restricting part restricts the upward movement of the front bolster by contacting the upper flange from below . The vehicle body structure of a semi-trailer according to claim 1,
The front bolster fixing mechanism is movable between a front and rear lock hole formed in the web of the left and right main beams, a lock position for engaging with the lock hole, and a lock release position for releasing from the lock hole. With left and right lock pins,
The front bolster is provided with a link member for moving the left and right lock pins in conjunction with each other between the lock position and the unlock position.
The semi-trailer vehicle body structure , wherein the link member is disposed inside the front bolster and extends in a vehicle width direction . The vehicle body structure of the semi-trailer according to claim 1 or 2,
A rear bolster extending in the vehicle width direction and fixed to the rear ends of the left and right main beams;
A pair of left and right provided at both ends of the rear bolster, releasably engaged with a rear lower corner of the first standard container and releasably engaged with a side edge on the bottom side of the second standard container The back side clamping device,
An intrusion prevention device that extends in the vehicle width direction below the rear bolster and is slidably supported in the front-rear direction with respect to the left and right main beams;
The intrusion prevention device is released with respect to the left and right main beams at each of a storage position corresponding to the first standard container and a protrusion position behind the storage position and corresponding to the second standard container. A semi-trailer vehicle body structure characterized by comprising an intrusion prevention device fixing mechanism that can be fixed. The vehicle body structure of the semi-trailer according to claim 1 or 2,
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;
The rear side frame can be released from the left and right main beams at a storage position corresponding to the first standard container and a projecting position behind the storage position and corresponding to the second standard container. A rear side frame fixing mechanism to be fixed to,
Provided at both ends of the rear bolster, the rear side frame is releasably engaged with the rear lower end corner of the first standard 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 tightening devices releasably engaged with the rear lower corner of the second standard container
A semi-trailer vehicle body structure comprising: an intrusion prevention device extending in a vehicle width direction below the rear bolster and supported by the left and right rear side frames.

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