JP5541633B2 - Semi-trailer side bumper - Google Patents

Description

  The present invention relates to a semi-trailer side bumper capable of changing a wheel base.

  Patent Document 1 describes a semi-trailer including a vehicle body, a head portion, and a tail portion. The head portion and the tail portion are completely overlapped with the vehicle body and are drawn out from the position corresponding to the container length of about 6 m to the front and rear of the vehicle body from the position corresponding to the container length of about 12 m. A first guide rail and a second guide rail are provided inside the side beam of the vehicle body, the rear portion of the head portion is movably supported by the first guide rail, and the front portion of the tail portion is the first guide rail. The two guide rails are movably supported.

  Patent Document 2 describes a trailer in which a side bumper is attached in front of a rear wheel on a side portion of a main frame.

JP 58-194635 A JP-A-9-216585

  The semi-trailer of Patent Document 1 can change the overall length of the vehicle body, while the side bumper of Patent Document 2 has a constant length. For this reason, when the side bumper of Patent Document 2 is applied to the semi-trailer of Patent Document 1, the length of the side bumper must be set on the basis of the state in which the vehicle body is most shortened. Therefore, there is a possibility that the function of the side bumper is not fully exhibited.

  In view of the above circumstances, an object of the present invention is to provide a side bumper suitable for a semi-trailer that can change a wheel base.

  In order to achieve the above object, the present invention provides a side bumper disposed in front of a semi-trailer wheel including a front main frame, a rear bogie frame, and a coupling mechanism, and has a plurality of lengths extending in the front-rear direction. A bumper body having a scale-like bumper member is provided.

  The main frame has a pair of left and right main beams extending in the front-rear direction, and is pulled by being connected to the tractor. The bogie frame has a pair of left and right bogie beams that extend in the front-rear direction and support the left and right main beams so as to be slidable in the front-rear direction, and is supported from below by left and right wheels. The connection mechanism releasably connects the left and right main beams and the left and right bogie beams at each of a plurality of predetermined positions at which the main frame and the bogie frame have different relative positions in the front-rear direction.

  The plurality of bumper members include at least a front bumper member fixed to the main beam and a rear bumper member fixed to the bogie beam, and extend and contract in the front-rear direction of the bumper body by overlapping in a slidable manner. Make it possible.

  In the above configuration, the connection between the main beam and the bogie beam by the connection mechanism is released, and the relative position in the front-rear direction between the main frame and the bogie frame is changed from one predetermined position to another predetermined position, and then the main mechanism is operated by the connection mechanism. By connecting the beam and the bogie beam again, it is possible to change to a suitable wheel base corresponding to the total length of the container to be loaded and travel. Therefore, it is possible to distribute the load in a well-balanced manner to each axle and suppress the concentration of the load on one axle.

  Further, the bumper body of the side bumper is constituted by a plurality of elongated bumper members extending in the front-rear direction, and the plurality of bumper members are fixed to the front bumper member fixed to the main beam and the bogie beam. The bumper body includes at least a rear bumper member that overlaps in a slidable manner so that the bumper body can be expanded and contracted in the front-rear direction. The length in the front-rear direction is also changed. Therefore, even when the wheel base is changed, the side bumper can reliably prevent the two-wheeled vehicle or the pedestrian from getting in front of the wheel.

  Further, when the main frame and the bogie frame relatively move between the shortened position and the extended position extended from the shortened position, the plurality of bumper members may include one or more intermediate bumper members. The front bumper member and the rear bumper member at the extended position are continuous in the front-rear direction via the intermediate bumper member while being separated in the front-rear direction. The front bumper member and the rear bumper member at the shortened position overlap each other and continue in the front-rear direction.

  In the above configuration, the front bumper member and the rear bumper member at the extended position are continuous in the front-rear direction via the intermediate bumper member while being separated from each other in the front-rear direction, so that the relative movement distance from the shortened position to the extended position is increased. Even if it is long, it is possible to set the bumper body over the entire desired range.

  The side bumper may include an intermediate bumper support member that releasably fixes the intermediate bumper member to the main beam or the bogie beam. The intermediate bumper member released from being fixed by the intermediate bumper support member is supported by the front bumper member and the rear bumper member.

  In the above configuration, even when the bumper body is extended and the intermediate portion of the intermediate bumper member is not directly supported (not overlapped) by the front bumper member and the rear bumper member, the intermediate bumper member is moved to the main beam by the intermediate bumper support member. Or since it can fix with respect to a bogie beam, the vibration of a bumper member, etc. during driving | running | working can be suppressed. Further, when the fixing of the intermediate bumper member hinders the shortening of the bumper body, it is only necessary to release the fixing of the intermediate bumper member. In the shortened state of the bumper body, vibration or the like is less likely to occur than in the extended state. That is, by appropriately fixing and releasing the fixing of the intermediate bumper member, it is possible to suppress vibration and the like while maintaining the stretchability of the bumper body.

  According to the present invention, even when the wheel base is changed, the side bumper can reliably prevent a two-wheeled vehicle or a pedestrian from getting in front of the wheels.

It is a top view which shows the semi-trailer (shortest) of 1st Embodiment of this invention. It is a top view which shows the state which extended the semitrailer from the shortest length. It is a side view of the semi-trailer (shortest) at the time of rear end alignment which loaded a 20ft container. It is a side view of the semi-trailer (intermediate length) at the time of driving | running | working which loaded the 20ft container. It is a side view of the semi-trailer (intermediate length) which loaded the 40ft container. It is a side view of the semi-trailer (longest) which loaded the 45ft container. It is a figure which shows a main frame, (a) is a top view, (b) is a side view. It is a figure which shows a bogie frame, (a) is a top view, (b) is a side view. It is a top view of the rear-end part of a main frame. It is XX arrow sectional drawing of FIG. It is a top view of the front-end part of a bogie frame. It is XII-XII arrow sectional drawing of FIG. It is a top view which shows a main connection mechanism. It is a top view which shows the rear-end part of a bogie frame, and an expansion-contraction beam. It is a top view which shows an expansion-contraction beam connection mechanism. It is XVI-XVI arrow directional cross-sectional view of FIG. It is a side view of a telescopic beam. It is a top view explaining the fixed position of an expansion-contraction beam, (a) has shown the accommodation position, (b) has shown the 1st protrusion position, (c) has shown the 2nd protrusion position, respectively. It is a side view which shows a rush prevention apparatus. It is sectional drawing which shows the fastening device for small rear sides. It is sectional drawing which shows the large sized fastening device for rear sides. It is XXII-XXII arrow sectional drawing of FIG. It is XXIII-XXIII arrow sectional drawing of FIG. It is a side view which shows the side bumper in the shortest position. It is sectional drawing which shows the overlap of a bumper member, (a) shows the example of the bumper member of this embodiment, (b) shows another example. It is a side view which shows the side bumper extended from the shortest position, (a) shows the state immediately after extending from the shortest position, and (b) shows the further extended state. It is a side view which shows the side bumper of the state where the intermediate bumper member was pulled out, (a) shows the state of the 1st extension position, and (b) shows the state of the 2nd extension position. It is a side view which shows the side bumper (shortest position) of 2nd Embodiment of this invention. It is sectional drawing which shows the overlap of the bumper member of FIG. 28, (a) shows a side bumper member, (b) shows an upper bumper member. It is a side view which shows the side bumper of the state where the intermediate bumper member was pulled out, (a) shows the state of the 1st extension position, and (b) shows the state of the 2nd extension position. It is XXXI-XXXI arrow sectional drawing of Fig.30 (a). It is a principal part enlarged view of FIG. It is a top view which shows the front-end part of an intermediate | middle bumper member, and the rear-end part of a front side bumper member, (a) shows the state before the front-end part of an intermediate | middle bumper member and the rear-end part of a front-side bumper member engage. (B) shows the engagement state between the front end portion of the intermediate bumper member and the rear end portion of the front bumper member. It is a figure which shows the rear-end part of the intermediate | middle bumper member in a 1st expansion | extension position, and the front-end part of a rear side bumper member, (a) is the side view to which the A section of FIG. 30 was expanded, (b) is (a). FIG. It is a figure which shows the rear-end part of the intermediate | middle bumper member in a 2nd expansion | extension position, and the front-end part of a rear side bumper member, (a) is the side view to which the A section of FIG. 30 was expanded, (b) is (a). FIG. It is a top view which shows a floating stay, (a) shows the state in which the rear side bumper member inclines with respect to the front-back direction, (b) shows the state in which the rear side bumper member is extended along the front-back direction. Show.

  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 FIGS. 3 to 6, the semi-trailer 1 of the present embodiment includes a 20 ft container (small container) 20 whose front and rear length is set to 20 feet, and a 40 ft container (first container) set to 40 feet. This is a dual-purpose trailer capable of selectively loading a large container 25 and a 45 ft container (second large container) 30 set to 45 feet, and is pulled by being connected to a tractor (not shown).

  These containers 20, 25, and 30 are both box-type, and the rear surfaces of the containers 20, 25, and 30 are closed by doors (not shown) that open to the left and right to open the interior of the containers. ing. Front corner fittings 21, 26, 31 and rear corner fittings 22, 27, 32 are fixed to the front lower corners and rear lower corners of the containers 20, 25, 30, respectively.

  Engagement holes (not shown) that open downward are provided in the front and rear corner fittings 21 and 22 of the 20ft container 20, respectively. The front corner fittings 26 and 31 of the 40 ft container 25 and the 45 ft container 30 are provided with engagement holes (not shown) opening forward, and the rear corner fittings 27 and 32 are engaging downward. A hole (not shown) is provided. A corner bracket 33 at an intermediate position is fixed to the side edge of the rear bottom side of the 45 ft container 30, and an engagement hole (not shown) that opens downward on the corner bracket 33 in the same manner as the corner bracket 32 on the rear side. Is provided. A concave tunnel recess (not shown) for absorbing a step 16 of the main frame 3 to be described later is provided at the approximate center in the vehicle width direction of the front portion of each bottom of the 40 ft container 25 and 45 ft container 30. ing. On the other hand, no tunnel recess is provided at the bottom of the 20 ft container 20.

  As shown in FIGS. 1 to 8, the chassis frame 2 of the semi-trailer 1 includes a front main frame 3 and a rear bogie frame 6.

  The main 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 that connect the left and right main beams 4 together. 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. 10).

  A rectangular flat apron plate 9 is fixed to the front ends of the left and right main beams 4. The left and right side portions 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 portions of the left and right main beams 4 are covered with the apron plate 9. A king pin 15 protrudes from the lower surface of the apron plate 9 substantially in the center in the vehicle width direction. The king pin 15 is releasably connected to a coupler (not shown) of a tractor that pulls the semi-trailer 1. In addition, in order to arrange the king pin 15 according to the height corresponding to the coupler of the tractor, the front end portion of the main beam 4 is raised by a step 16 called a gooseneck. Further, a support leg (jack device) 17 for supporting the chassis frame 2 separated from the tractor is attached immediately behind the step 16 of the main frame 3.

  A front bolster 40 extending in the vehicle width direction above the front end of the apron plate 9 is fixed to the front end portions of the left and right main beams 4, and the left and right ends of the front bolster 40 protrude from the main beams 4 outward in the vehicle width direction. It extends. A pair of left and right container guides 39 are fixed to the upper surface of the front bolster 40. The container guide 39 guides the lower portions of the front ends of the containers 25 and 30 to a predetermined front and rear position when the containers 25 and 30 are loaded on the semi-trailer 1.

  Upper rear bolsters 50 extending in the vehicle width direction are fixed to the rear ends of the left and right main beams 4, and the left and right ends of the upper rear bolster 50 extend from the main beams 4 so as to protrude outward in the vehicle width direction. An intermediate bolster 60 is fixed to an intermediate portion of the left and right main beams 4 (immediately behind the step 16), and both left and right ends of the intermediate bolster 60 protrude from the main beams 4 so as to protrude outward in the vehicle width direction. .

  A large container front tightening device (hereinafter referred to as a large front tightening device) 41 is attached to the left and right ends of the front bolster 40. Small container rear tightening devices (hereinafter referred to as small rear tightening devices) 51 are attached to the left and right ends of the upper rear bolster 50. A small container front tightening device (hereinafter referred to as a small front tightening device) 61 is attached to the left and right ends of the intermediate bolster 60. The small rear side tightening device 51 and the small front side tightening device 61 are configured in the same manner, and each tightening device 51, 61 protrudes upward from the upper surface of each bolster 50, 60 and descends from the use position. In addition, a twist lock 52 that can be raised and lowered between the storage positions accommodated in the bolsters 50 and 60 is provided. When the 20ft container 20 is loaded, the twist lock 52 is set to the use position, and when the 40ft container 25 and the 45ft container 30 are loaded, the twist lock 52 is set to the storage position.

  The bogie frame 6 includes a pair of left and right bogie beams 7 that extend substantially parallel to the front-rear direction on the outside of the left and right main beams 4 in the vehicle width direction, and a cross frame 8 that connects the left and right bogie frames 7 together. A pair of left and right telescopic beams 12 are supported at the rear ends of the left and right bogie beams 7 so as to be slidable in the front-rear direction.

  The left and right bogie beams 7 are set to have an overall length slightly shorter than a region behind the step 18 in the main beam 4 (hereinafter referred to as a gooseneck rear region). Are slidably supported from below. The region excluding the front end portion of the bogie beam 7 is formed by an inner plate 7c and an outer plate 7d, which are opposed to each other with a plate-like upper plate 7a and a lower plate 7b that are spaced apart from each other in the vehicle width direction. The front end portion of the bogie beam 7 has a T-shaped cross section in which the web 7f extends downward from an upper flange 7e continuous with the upper plate 7a (see FIG. 12). Wheels (tires) 11 are mounted on the bogie frame 6 via a suspension device 10 and three axles (not shown), and the bogie frame 6 is supported by the wheels 11 from below.

  The left and right telescopic beams 12 are, by the telescopic beam coupling mechanism 150 described later, a front storage position, a first projecting position behind the storage position, and a second projecting position behind the first projecting position. Are fixedly supported at any one of the positions. A lower rear bolster 70 extending in the vehicle width direction is fixed to the rear end portions of the left and right telescopic beams 12, and the left and right ends of the lower rear bolster 70 extend from the respective telescopic beams 12 so as to protrude outward in the vehicle width direction. Large container rear tightening devices (hereinafter referred to as large rear tightening devices) 71 are attached to the left and right ends of the lower rear bolster 70. The large rear tightening device 71 is rotatable between a use position protruding upward from the upper surface of the lower rear bolster 70 and a retracted position tilted from the standing position.

  An intrusion prevention device 80 is supported at the lower part of the lower rear bolster 70 so as to be slidable in the front-rear direction. The rush preventing device 80 is fixedly supported at either the front housing position or the rear protruding position.

  The total length of the chassis frame 2 is shortest in the maximum overlap state in which the telescopic beam 12 is supported at the storage position and the front and rear positions of the rear end of the main beam 4 and the rear end of the bogie beam 7 are substantially coincident. It is possible to project forward with respect to the bogie frame 6 from the maximum overlap state. The entire length of the chassis frame 2 is extended by the forward projection of the main frame 3, and the wheel base (the distance between the axle of the front wheel attached to the tractor and the axle of the rear wheel 11 attached to the bogie frame 6). Is changed. In the maximum overlapping state, the large rear tightening device 71 is set to the retracted position, and the upper rear bolster 50 overlaps above the lower rear bolster 70.

  The left and right main beams 4 and the left and right bogie beams 7 are separated by a main connection mechanism (connection mechanism) 130 described later at each of a plurality of predetermined positions where the relative positions of the main frame 3 and the bogie frame 6 in the front-rear direction are different. It is connected releasably. In the present embodiment, as a plurality of predetermined positions where the coupling mechanism couples both the frames 3 and 6, the shortened position (shortest position) where the maximum overlap state (the total length of both beams 4 and 7 is shortest) and the both beams 4 are combined. , 7 has a first extension position where the total length of the beams 7 is longer than the shortest length by a first predetermined distance, and a second extension position where the total length of both beams 4, 7 is longer than the shortest length by a second predetermined distance (> first predetermined distance). Extension position (longest position) is set. When the wheel base is changed (the main frame 3 is moved in the front-rear direction with respect to the bogie frame 6), the tractor is connected to the main frame 3, the main connection mechanism 130 is released, and braking force is applied to the wheels 11. The tractor is moved forward or backward while the brakes of the wheels 11 are being operated.

  As shown in FIG. 3, when loading a 20 ft container 20, the front corner fitting 21 of the container 20 is fastened by a small front fastening device 61, and the rear corner fitting 22 is fastened by a small rear fastening device 51. To do. That is, the distance between the small front side tightening device 61 and the small rear side tightening device 51 is set to be approximately equal to the distance between the front corner fitting 21 and the rear corner fitting 22 of the 20 ft container 20.

  When loading and unloading the 20ft container 20 and loading / unloading with the platform 19 (when 20ft rear end is aligned), the total length of both beams 4 and 7 is set to the shortest, the telescopic beam 12 is set to the storage position, and the inrush prevention device 80 Is the storage position. Thereby, the rear end of the semi-trailer 1 can be brought close to or in contact with the platform 19 to load / unload the load.

  As shown in FIG. 4, when the 20ft container 20 is loaded and traveled (20ft travel), the main beam 4 is pulled forward from the 20ft rear end alignment, and the total length of both beams 4 and 7 is set to the first predetermined length. And The telescopic beam 12 is maintained in the storage position, and the inrush prevention device 80 is maintained in the storage position. By setting the total length of both beams 4 and 7 to the first predetermined length, the load is distributed in a balanced manner to each axle, and the concentration of the load on one axle is suppressed.

  As shown in FIG. 5, when the 40ft container 25 is loaded, the total length of both beams 4 and 7 is set to the first predetermined length, the telescopic beam 12 is set to the second protruding position, and the rush preventing device 80 is set to the receiving position. . Further, the front corner fitting 26 of the container 25 is fastened by the large front fastening device 41, and the rear corner fitting 27 is fastened by the large rear fastening device 71. That is, the amount of protrusion from the retracted position of the telescopic beam 12 to the second protruding position is the total length of both beams 4 and 7 based on the distance between the front corner fitting 26 and the rear corner fitting 27 of the 40 ft container 25. The distance between the large front-side tightening device 41 and the large rear-side tightening device 71 when the predetermined length is 1 is set to be substantially equal to the distance.

  As shown in FIG. 6, when the 45 ft container 30 is loaded, the total length of both beams 4 and 7 is set to the second predetermined length (longest), the telescopic beam 12 is set to the first protruding position, and the intrusion prevention device 80 is protruded. Position. Further, the front corner fitting 31 of the container 30 is fastened by a large front fastening device 41, and the intermediate corner fitting 33 is fastened by a large rear fastening device 71. That is, the amount of protrusion from the retracted position of the telescopic beam 12 to the first protruding position is the total length of both beams 4 and 7 based on the distance between the front corner fitting 31 and the intermediate corner fitting 33 of the 45 ft container 30. 2 is set to be approximately equal to the distance obtained by subtracting the distance between the large front side fastening device 41 and the large rear side fastening device 71. When loading the 40 ft container 25 and 45 ft container 30, by setting the total length of both beams 4 and 7 and the telescopic beam 12 as described above, as in the case of 20 ft container traveling, Thus, the load is distributed in a well-balanced manner, and the concentration of the load on one axle is suppressed.

  Next, a structure for supporting the main beam 4 so as to be slidable by the bogie beam 7 will be described with reference to FIGS.

  A pair of left and right rear guide rollers 110 are provided at the rear end of the main frame 3, and a pair of left and right front guide rollers 120 are provided at the front end of the bogie frame 6.

  At the rear end of the main frame 3, a cross frame 5 extending in the vehicle width direction in front of the upper rear bolster 50 and a set of two roller support plates 111 arranged on the left and right are provided. The left and right end portions of the cross frame 5 protrude outward in the vehicle width direction from the main beam 3, and the left and right roller support plates 111 stand facing each other along the vehicle front-rear direction, and the upper rear bolster 50 and the cross frame 5 Are connected. The rear guide roller 110 is disposed between the two roller support plates 111 and is supported from the left and right by the roller support plate 111 so as to be rotatable about a rotation shaft 112 along the vehicle width direction. The lower part of each rear guide roller 110 protrudes downward from the lower end of the roller support plate 111 and comes into contact with the upper surfaces of the left and right bogie beams 7 from above. In the present embodiment, a long plate-like guide plate 113 constituting a part of the upper surface is attached to the upper surface of the upper plate 7 a of the left and right bogie beams 7, and the outer peripheral surface of the roller support plate 111 is the guide plate 113. It rotates (rolls) while contacting the top surface. The guide plate 113 is disposed over the entire moving range of the rear guide roller 110 in the front-rear direction range of the upper surface of the upper plate 7a.

  The front end portion of the bogie frame 6 is provided with two cross frames 8 extending substantially in parallel along the vehicle width direction and a set of two roller support plates 121 arranged on the left and right. The left and right roller support plates 121 stand opposite to each other along the vehicle front-rear direction and connect the two cross frames 8 together. The front guide roller 120 is disposed between the two roller support plates 121 and is supported from the left and right by the roller support plates 121 so as to be rotatable about a rotation shaft 122 along the vehicle width direction. The upper part of each front guide roller 120 protrudes upward from the upper end of the roller support plate 121 and rotates while coming into contact with the lower surfaces of the left and right main beams 4 from below.

  The bogie beam 7 supports the left and right of the rear end portion of the main beam 4 and the left and right of the front end portion from below through the rear guide roller 110 and the front guide roller 120 so as to be slidable in the front and rear direction.

  A pair of left and right guide rails 125 extending in the front-rear direction are fixed via a plurality of brackets 126 to the inner surface in the vehicle width direction of the inner plate 7c, which is the inner side in the vehicle width direction of the left and right bogie beams 7, respectively. Yes. The upper surface of the lower flange 4b of the left and right main beams 4 on the outer side in the vehicle width direction from the web 4c functions as a pair of left and right upper movement restriction surfaces 127 extending in the front-rear direction near the lower side of the left and right guide rails 125. The upward movement of the main frame 2 relative to the bogie frame 6 is restricted by the upper movement restriction surface 127 coming into contact with the guide rail 125 from below. The guide rail 125 is disposed over substantially the entire region of the bogie beam 7 in the front-rear direction.

  A pair of left and right stopper plates 128 extending in the front-rear direction are fixed to the outer surface in the vehicle width direction of the web 4c, which is the side portion of the left and right main beams 4 on the outer side in the vehicle width direction. The outer surfaces in the vehicle width direction of the left and right stopper plates 128 function as lateral movement restricting surfaces 129 extending in the front-rear direction near the inner side in the vehicle width direction of the guide rail 125. The movement of the main frame 3 in the vehicle width direction relative to the bogie frame 6 is restricted by the lateral movement restriction surface 129 coming into contact with the guide rail 125 from the inside in the vehicle width direction.

  Next, the main coupling mechanism 130 will be described with reference to FIGS. 7, 12, and 13.

  The main coupling mechanism 130 includes three pin insertion holes 131 (see FIG. 7) having different front and rear positions (see FIG. 7), a pair of left and right lock pin devices 132, an air chamber (drive means) 133, The link mechanism 134 and the case body 135 are provided and arranged at the front end of the bogie frame 6. The three lock pin insertion holes 131 are formed in the web 4c at predetermined positions in the front-rear direction of the main beam 4 corresponding to the shortest position, the first extension position, and the second extension position, respectively. The frontmost lock pin insertion hole 131 corresponds to the shortened position, the rearmost lock pin insertion hole 131 corresponds to the second extended position, and the lock pin insertion hole 131 therebetween corresponds to the first extended position. The case body 135 is disposed between the left and right main beams 4 and is supported by the left and right bogie beams 7 via the cross frame 8. The main part of the lock pin device 132 and the link mechanism 134 are accommodated in the case body 135.

  The lock pin device 132 includes a housing 136, a lock pin 137, and a coil spring (biasing means) 138. The housing 136 has a cylindrical shape, and is fixed to the side wall of the case body 135 on the outer side in the vehicle width direction with the end portion on the outer side in the vehicle width direction penetrating the case body 135. The lock pin 137 protrudes from the end of the housing 136 in the vehicle width direction outside to the vehicle width direction outside and passes through the lock pin insertion hole 131, and moves from the lock position to the vehicle width direction inside to enter the lock pin insertion hole. It is supported by the housing 136 so as to be slidable along the vehicle width direction between the unlock position and the unlock position. The coil spring 138 biases the lock pin 137 to the lock position. A tip end of a pin shaft portion 139 extending inward in the vehicle width direction from the lock pin 137 protrudes from the housing 136.

  The main beam 4 and the bogie beam 7 are fixed at a shortened position by inserting the lock pin 137 through the foremost pin insertion hole 131 of the three pin insertion holes 131 and lock the rearmost pin insertion hole 131. When the pin 137 is inserted, the pin is fixed at the second extended position, and when the lock pin 137 is inserted through the pin insertion hole 131 therebetween, the pin is fixed at the first extended position.

  The air chamber 133 is disposed substantially at the center in the vehicle width direction and is fixed on the rear surface of the rear plate of the case body 135. The drive shaft 140 of the air chamber 133 moves in the front-rear direction in a state where the rear plate of the case body 135 is inserted, and an elongated pin connection hole 141 is formed at the front end portion thereof. The connection pin 142 is inserted into the pin connection hole 141.

  The link mechanism 134 includes a plate-like rotating member 143 that is rotatably supported by the case body 135, and left and right links 144 that extend in the vehicle width direction. The rotating member 143 integrally includes two link connecting end portions 143a facing each other across the rotation center, and an air chamber connecting end portion 143b 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 144 is rotatably connected to the pin shaft portion 139, and the other end portion (end portion on the inner side in the vehicle width direction) is connected to the link connecting end portion 143a of the rotating member 143. Is rotatably connected to. The air chamber connecting end 143b of the rotating member 143 is connected to the drive shaft 140 of the air chamber 133 via a connecting pin 142 (pin connecting hole 141).

  In a state where the lock pin 137 protrudes to the lock position, air is discharged from the air chamber 133, and the drive shaft 140 is shortened most (see FIG. 13). When the lock pin 137 is unlocked, air (compressed air) is supplied to the air chamber 133. As a result, the drive shaft 140 extends forward, the connecting pin 142 is pushed forward by the rear end edge of the pin connecting hole 141, and the rotating member 143 rotates clockwise (in the direction of the arrow) in FIG. The link 144 moves inward in the vehicle width direction, and the lock pin 137 moves inward in the vehicle width direction against the urging force of the coil spring 138. When the connecting pin 142 reaches the position indicated by the two-dot chain line in FIG. 13, the lock pin 137 reaches the unlocking position, and the sliding movement of the main beam 4 with respect to the bogie beam 7 is allowed. For example, when the main beam 4 in the shortened position is moved to the first extended position, air is supplied to the air chamber 133, the lock pin 137 is moved to the unlock position, the tractor is advanced, and the main beam 4 is moved forward. After drawing out, air is discharged from the air chamber 133. When the air is discharged, the drive shaft 140 is shortened, the connecting pin 142 is positioned in the vicinity of the rear end edge of the pin connecting hole 141, and the lock pin 137 attempts to return to the locked position by the biasing force of the coil spring 138. Since the pin 137 is disengaged from the pin insertion hole 131, the return of the lock pin 95 to the locked position is prevented by the web 4c of the main beam 4. The main beam 4 is further pulled forward by advancing the tractor, and when the main beam 4 reaches the first extended position, the connecting pin 142 moves backward in the pin connecting hole 141 and is locked by the biasing force of the coil spring 138. The pin 137 enters the front pin insertion hole 131.

  In this embodiment, as shown in FIG. 7A, the bogie beam 7 is disposed between the switch 145 that is turned on by the operator when the main beam 4 is moved and the adjacent pin insertion hole 131. Two control sensors (detection means) 146 and 147 before and after detection, and a control device (control means) 148 that controls supply and discharge of air to and from the air chamber 133 in accordance with input signals from the switch 145 and the sensors 146 and 147. And are provided. When the relative positions of the beams 4 and 7 are shortened positions, the front and rear sensors 146 and 147 both detect the bogie beam 7. When the relative positions of the beams 4 and 7 are the first extended position, the front sensor 146 does not detect the bogie beam 7, but the rear sensor 147 detects the bogie beam 7. When the relative positions of the beams 4 and 7 are the first extended position, the front and rear sensors 146 and 147 do not detect the bogie beam 7. When the switch 146 is turned on, the control device 148 instructs the control valve or the like to supply air to the air chamber 133. When the operator moves forward or backward on the tractor, the main beam 4 moves with respect to the bogie beam 7, and the detection state of one of the sensors 146 and 147 changes, the control device 148 moves the air chamber to the control valve or the like. The air discharge from 133 is instructed. Therefore, the operator can change the total length of both beams 4 and 7 simply by moving the tractor forward or backward after operating the switch 145.

  The switch 145 accepts an input that distinguishes between movement between the pin insertion holes 131 adjacent to the front and rear (one-stage movement) and movement between the shortest position and the longest position (two-stage movement). May be. The control device 148 controls the air in the same manner as described above when a one-step movement is input. On the other hand, when a two-stage movement is input, it is determined whether the position before the movement is the shortest position or the second extension position from the detection state of the sensors 146 and 147 at that time. When it is determined that the position is the shortest position, air discharge is not instructed according to a change in the detection state of the front sensor 146, and air discharge is instructed according to a change in the detection state of the rear sensor 147. On the other hand, when it is determined that the position is the second extension position, the air discharge is not instructed according to the change in the detection state of the rear sensor 147, and the air discharge is instructed according to the change in the detection state of the front sensor 146. To do. In addition, when a two-step movement is input, if it is determined that the position before the movement is the first extension position, it is an erroneous operation, so control is performed when a one-step movement is input. .

  Next, the telescopic beam 12, the telescopic beam coupling mechanism 150, and the telescopic beam driving device 170 will be described with reference to FIGS.

  The rear end portions of the left and right bogie beams 7 are substantially cylindrical, and the front end portions of the left and right telescopic beams 12 extending in the front-rear direction are inserted therein, and the telescopic beams 12 slide in a telescopic manner with respect to the bogie beam 7. It is installed as possible. The telescopic beam 12 is formed by joining two rectangular cylinders stacked one above the other. The rear end of the bogie beam 7 and the telescopic beam 12 have a front storage position (see FIG. 18A), a first protruding position behind the storage position (see FIG. 18B), A telescopic beam coupling mechanism 150 is provided for releasably fixing the telescopic beam 12 to the left and right bogie beams 7 at each of the second projecting positions behind the one projecting position (see FIG. 18C). It has been.

  The telescopic beam coupling mechanism 150 includes three pin insertion holes 151 (see FIG. 17) having different front and rear positions (see FIG. 17), a pair of left and right lock pin devices 152, an air chamber 153, and a link mechanism. 154. The front and rear lock pin insertion holes 151 are formed at predetermined positions on the inner side wall of the telescopic beam 12 in the vehicle width direction.

  The lock pin device 152 includes a housing 155, a lock pin 156, and a coil spring 157. The housing 155 has a cylindrical shape, and is fixed to a side wall of the bogie beam 7 on the inner side in the vehicle width direction with an end portion on the outer side in the vehicle width direction penetrating the bogie beam 7. The lock pin 156 has a lock position that protrudes from the outer end of the housing 155 in the vehicle width direction into the bogie beam 7 and a lock release position that moves inward in the vehicle width direction from the lock position and does not protrude into the bogie beam 7. Is supported by the housing 155 so as to be slidable along the vehicle width direction. The coil spring 157 biases the lock pin 156 to the lock position. A tip end of a pin shaft portion 158 extending inward in the vehicle width direction from the lock pin 156 protrudes from the housing 155.

  The telescopic beam 12 is fixed at the storage position by inserting the lock pin 156 through the rearmost pin insertion hole 151 among the three pin insertion holes 151, and the lock pin 156 is inserted through the frontmost pin insertion hole 151. By this, it fixes to a 2nd protrusion position, and it fixes to a 1st protrusion position by inserting the lock pin 156 in the pin insertion hole 151 between them.

  The air chamber 153 is disposed substantially at the center in the vehicle width direction, and is fixed to the lower surface of the peripheral device support plate 171 fixed to the cross frame 8 via a bracket (not shown). The drive shaft 159 of the air chamber 153 moves in the front-rear direction, and a long hole-like pin connection hole 160 is formed at the tip thereof. The connection pin 161 is inserted into the pin connection hole 160.

  The link mechanism 154 includes a plate-like rotating member 162 that is rotatably supported by the peripheral device support plate 171 and left and right links 163 that extend in the vehicle width direction. The rotating member 162 integrally includes two link connecting end portions 162a facing each other across the rotation center, and an air chamber connecting end portion 162b positioned substantially equidistant 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 163 is rotatably connected to the pin shaft portion 158, and the other end portion (end portion on the inner side in the vehicle width direction) is a link connection end portion 162a of the rotating member 162. Is rotatably connected to. The air chamber connecting end 162b of the rotating member 162 is connected to the drive shaft 159 of the air chamber 153 via a connecting pin 161 (pin connecting hole 160). As described above, the telescopic beam connecting mechanism 150 has the same configuration as the main connecting mechanism 130 and operates in the same manner as the main connecting mechanism 130 by supplying and exhausting air. Omitted.

  The telescopic beam driving device 170 is constituted by an air cylinder 172 fixed to the upper surface of the peripheral device support plate 171. The cylinder rod 173 of the air cylinder 172 can extend rearward, and the tip of the cylinder lot 173 is connected to the front surface of the lower rear bolster 70 in the substantially center in the vehicle width direction. By supplying and exhausting air to the cylinder rod 173, The telescopic beam 12 extends or shortens. The air cylinder 172 has a built-in limit switch, and a control device (not shown) receives a signal from a switch (not shown) to which an extension or shortening instruction is input from an operator and a signal from the limit switch. To do. The limit switch moves between the switch in which the state of the detection signal changes when the telescopic beam 12 moves between the storage position and the first protruding position, and the first protruding position and the second protruding position. The control device controls the supply and discharge of air to and from the air chamber 153 according to these input signals in the same manner as the control device 148 of the main coupling mechanism 130. To do. That is, the control device instructs the control valve or the like to supply air to the air chamber 153 when the switch is operated, and then supplies air to the air cylinder 172 based on the extension instruction or shortening instruction input to the switch. Is controlled to move the telescopic beam 12 with respect to the bogie beam 7. When the detection state of one of the limit switches changes, the control device instructs the control valve or the like to discharge air from the air chamber 153. Therefore, the operator can change the position of the lower rear bolster 70 only by operating the switch. The telescopic beam coupling mechanism 150 may also be controlled separately from the one-stage movement and the two-stage movement, similarly to the main coupling mechanism 130. Instead of the air cylinder 172, a hydraulic cylinder or the like may be used. You may provide the drive device.

  Next, the inrush prevention device 80 will be described with reference to FIG.

  The intrusion prevention device 80 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 81 extending forward. A pair of left and right support frames 82 extending downward are coupled to the left and right lower surfaces of the lower rear bolster 70, and through holes (not shown) penetrating in the front-rear direction are formed at the lower ends of the support frames 82. A frame part 83 is provided integrally. When the left and right support arms 81 are inserted through the through holes of the support frame 82, the intrusion prevention device 80 is supported to be slidable in the front-rear direction with respect to the bogie beam 7.

  Between the support arm 81 and the frame part 83 of the support frame 82, a storage position corresponding to the 40ft container 25 and the rear 20ft container 20R, and a protruding position behind the storage position and corresponding to the 45ft container 30 are provided. Are provided with a rush preventing device fixing mechanism 84 for releasably fixing the rush preventing device 80 to the left and right bogie beams 7 (support frame 82). The 45ft container 30 is loaded in a state of projecting rearward from the rear end (lower rear bolster 70) of the bogie beam 7 relative to the 40ft container 25 and the rear 20ft container 20R. In such a case, the rush prevention device 80 is fixed at the storage position, and when the 45 ft container 30 is loaded, the rush prevention device 80 is fixed at the protruding position behind the storage position.

  The intrusion prevention device fixing mechanism 84 includes a frame-side pin insertion hole 85 provided in the frame body portion 83 of the support frame 82, and arm-side pin insertion holes 86 at two front and rear positions formed in the support arm 81 (only the front is shown). And a lock pin 87 inserted through the pin insertion holes on the frame side and the arm side. The intrusion prevention device 80 is fixed at the storage position by inserting the lock pin 87 through the rear pin insertion hole of the front and rear arm side pin insertion holes, and the lock pin 87 is inserted through the front pin insertion hole 86. Is fixed in the protruding position.

  Next, each fastening device 41, 51, 61, 71 will be described.

  As shown in FIG. 7, the large front side fastening device 41 includes a thread pin 42, a lever 43, and a lever lock plate (not shown), and is disposed in the hollow interior of the end portion of the front bolster 40. The thread pin 42 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 26, 31 of the containers 25, 30 placed on the chassis frame 2. Is done. The thread pin 42 in the engagement position protrudes rearward from the rear surface of the front bolster 40 in a state where the 40 ft container 25 or the 45 ft container 30 is placed on the chassis frame 2, and enters the engagement holes of the front corner fittings 26 and 31. Enter and engage to regulate the movement of the containers 25, 30. The thread pin 42 in the disengagement position moves forward from the engagement position, disengages from the engagement hole, and allows the containers 25 and 30 to move.

  One end of the lever 43 is connected to the rear end portion of the thread pin 42 and extends inward in the vehicle width direction. When the lever 43 is pushed rearward, the thread pin 42 moves to the rear engagement position, and when the lever 43 is pulled forward, the thread pin 42 moves to the front engagement release position. A guide plate (not shown) standing 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 43 is inserted is formed in the guide plate. 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 43 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 is rotatably supported by the front bolster 40, and is engaged with the other end side of the lever 43 in both the state where the thread pin 42 is set to the engagement position and the state where the thread pin 42 is set to the engagement release position. By joining, the thread pin 42 is held in the engaged position or the disengaged position.

  As shown in FIG. 20, the small rear tightening device 51 is a lift-type twist lock device, and includes a body 53, a twist lock 52, a lever 54, and a handle rotation restricting arm (not shown). The body 52 is fixed to the end of the upper rear bolster 50. The twist lock 52 has a rectangular cylindrical shape with a long front-rear direction, and stands up substantially vertically upward. A rotation shaft (not shown) is rotatably inserted into the inner diameter portion of the twist lock 52, and a head 52a of the twist lock 52 is fixed to the upper end of the rotation shaft. By rotating the handle 55 provided integrally with the lower end of the rotating shaft, the head 52a is moved approximately 90 ° from the disengagement position (position shown in FIG. 20) having a long front-rear direction and the disengagement position. It rotates integrally with the rotating shaft between the rotated engagement positions. The lever 54 is rotatable between a lift allowance position and a lift prohibition position. When the head 52a is set to the disengagement position and the lever 54 is set to the lift allowance position, the twist lock 52 is moved to the head 52a. Can be moved up and down between a use position where the head 53 protrudes upward from the body 53 and a storage position where the head 52 is buried in the body 53. The twist lock 52 that can be moved up and down is maintained in the storage position by its own weight. When the twist lock 52 in the storage position is raised to the use position and the lever 54 is rotated to the lift prohibition position, the twist lock 52 is held in the use position. . In this state, when the handle 55 is rotated while being lifted, the head 52a is rotated to the engaged position. The rotational position of the head 52 is held by engaging the handle rotation restricting arm with the outer peripheral portion of the handle 55.

  When the twist lock 52 is set to the use position, the head 52a of the twist lock 52 is set to the disengagement position, and the 20ft container 20 is placed at a predetermined position of the chassis frame 2, the head 52a of the twist lock 52 is By entering the engagement hole of the corner fitting 22 from below and operating it while lifting the handle 55 and rotating approximately 90 °, it reaches the engagement position and engages with the engagement hole. When loading the 40 ft container 25 or the 45 ft container 30, the head 52 a protruding from the upper surface of the body 52 interferes with the lower surfaces of the containers 25 and 30, so that the twist lock 52 is set at the storage position. Since the small rear tightening device 51 and the small front tightening device 61 are configured in the same manner, detailed description of the small front tightening device 61 is omitted.

  As shown in FIGS. 21 to 23, the large rear tightening device 71 is a rotationally raised twist lock device, and includes a body 73, a twist lock 72, a lock hook 74, a lock shaft 75, and an assist grip 76. And an anti-rotation lock 77. The body 73 has a rectangular box shape, and the lower end portion of the body 73 is supported by the lower rear bolster 70 so as to be rotatable about a rotation shaft 78 along the vehicle longitudinal direction. The large rear fastening device 71 has a use position standing up with respect to the lower rear bolster 70 around the rotation shaft 78 (shown by a solid line in FIG. 22) and a 90 ° rotation inward in the vehicle width direction from the use position. It is possible to rotate between the storage position (indicated by a two-dot chain line in FIG. 22). The large rear tightening device 71 in the retracted position is supported by the lower rear bolster 70 while being stored in the lower rear bolster 70. The large rear tightening device 71 in the use position is restricted in rotational movement by engaging the distal end portion of the lock hook 74 rotatably supported by the lower rear bolster 70 with the lock shaft 75 fixed to the body 73. The In the retracted position, the entire large rear tightening device 71 is retracted below the lower surface of the upper rear bolster 50 so as not to interfere with the upper rear bolster 50 when the main beam 4 is set to the shortened position.

  Since the upper surface of the bogie beam 7 is lower than the upper surface of the main beam 4 and the upper surface of the lower rear bolster 70 is also lower than the upper surface of the upper rear bolster 50, the rear side of the main frame 3 in the 40 ft container 25 and the 45 ft container 30 is It is spaced upward from the upper surface of the bogie beam 7. For this reason, the height of the upper surface of the large rear tightening device 71 (body 73) at the use position is set to a height that contacts the 40ft container 25 and the 45ft container 30 and supports from below. Thus, the large rear fastening device 71 in the use position is disposed immediately below the corner fitting 27 of the 40 ft container 25 or the corner fitting 33 of the 45 ft container 30 placed on the chassis frame 2. The rear part of 30 is supported from below.

  The twist lock 72 has a rectangular cylindrical shape with a long front-rear direction, is fixed to the body 73, and protrudes from the upper surface of the body 73 (the upper surface at the use position). In the use state in which the large rear tightening device 71 is set to the use position, the twist lock 72 stands substantially vertically upward. The rotary shaft 72b is inserted into the inner diameter portion of the twist lock 72 while being rotatably supported, and the head 72a of the twist lock 72 is fixed to the upper end of the rotary shaft 72b. By rotating a handle 79 provided integrally with the lower end of the rotating shaft 72b, the head 72a is moved from the disengagement position (shown in FIGS. 21 and 22) having a long front-rear direction and the disengagement position. It rotates integrally with the rotating shaft 72b between the engagement positions rotated approximately 90 °.

  Holding the assist grip 76, the large rear fastening device 71 in the retracted position is rotated to the use position, the head 72a of the twist lock 72 is set to the disengagement position, and the 40ft container 25 or the 45ft container 30 is moved to the chassis. When placed at a predetermined position on the frame 2, the head 72 a of the twist lock 72 enters the engagement holes of the corner brackets 27 and 33 from below and operates the handle 79 to rotate approximately 90 ° to engage. The position is reached and engages with the engagement hole. The anti-rotation lock 77 is supported so as to be able to move up and down with respect to the standing body 73. When the anti-rotation lock 77 temporarily held at the upper position is lowered, the anti-rotation lock 77 is engaged with the outer peripheral portion of the handle 79. In combination, the rotation of the head 72 is prevented. When the main beam 4 is set at the shortened position, the large rear fastening device 71 is set at the retracted position.

  Each of the tightening devices 51, 61, 71 described above is not limited to the above structure as long as it has a required function.

  Next, the side bumper 180 will be described with reference to FIGS. Since the side bumper 180 is provided symmetrically, only one (left side) will be described, and the other (right side) will not be described.

  The side bumper 180 is disposed on the outer side of the wheel 11 below the side of the chassis frame 2 on the outer side in the vehicle width direction than the support leg 17 in order to prevent a two-wheeled vehicle or a pedestrian from getting in front of the wheel 11 of the traveling semi-trailer 1. Arranged forward. In the present embodiment, as the arrangement region of the side bumper 180, a range from immediately behind the step 16 of the main beam 4 to just before the wheel 11 is set.

  The side bumper 180 includes a bumper body 181, a front fixed plate 182, two front and rear rear fixed plates 183 and 184, a movable plate 185, and a stay 186.

  The bumper main body 181 has a plurality (9 in this embodiment) of long bumper members 190 to 192 extending in the front-rear direction. The bumper members 190 to 192 are divided into three front bumper members 190 constituting the front unit, three intermediate bumper members 191 constituting the middle unit, and three rear bumper members 192 constituting the rear unit. Divided. The three bumper members 190 to 192 in each unit are arranged in an upper stage, a middle stage, and a lower stage, and extend in the front-rear direction so as to be substantially parallel to each other in the vertical direction.

  In each of the upper stage, the middle stage, and the lower stage, the front bumper member 190, the intermediate bumper member 191 and the rear bumper member 192 are arranged at substantially the same height, and are slidably overlapped so that they can be moved in the front-rear direction of the bumper body 181. It can be expanded and contracted. The bumper members 190 to 192 of the present embodiment have a circular tube shape as shown in FIG. The inner diameter of the intermediate bumper member 191 is set slightly larger than the outer diameter of the front bumper member 190, and the inner diameter of the rear bumper member 192 is set slightly larger than the outer diameter of the intermediate bumper member 191. The intermediate bumper member 191 is inserted into the inner diameter portion of the member 192, and the front bumper member 190 is inserted into the inner diameter portion of the intermediate bumper member 191.

  The shape of the bumper members 190 to 192 is arbitrary as long as the bumper members 181 overlap with each other so as to be slidable so that the bumper main body 181 can be expanded and contracted in the front-rear direction. As shown in FIG. 5, the front bumper member 193, the intermediate bumper member 194, and the rear bumper member 195 may be formed in a U-shaped cross section having different sizes and overlapped.

  Further, the number of bumper members in the unit can be arbitrarily set as long as it is one or more, and the total number of units can be arbitrarily set as long as it is two or more. When the intermediate bumper member 191 is omitted, the total number of units is two, and when a plurality of middle units are provided (when a plurality of intermediate bumper members that are slidably overlapped are provided), the total number of units is four or more.

  A front end portion of the front bumper member 190 is coupled to a front fixing plate 182 that extends in the vertical direction, and an upper portion of the front fixing plate 182 is bent inward in the vehicle width direction and coupled to the rear side of the step 16 of the main beam 4. Is done. An intermediate portion and a rear end portion of the rear bumper member 192 are coupled to rear fixing plates 183 and 184 extending in the vertical direction, and upper portions of the rear fixing plates 183 and 184 are bent and extended inward in the vehicle width direction. Coupled to the front end of the bogie beam 7. The front end portion of the intermediate bumper member 191 protrudes forward from the front end portion of the rear bumper member 192 and is coupled to a movable plate 185 extending in the vertical direction.

  The stay 186 has a hook portion 187 at the lower part of the front surface, and is fixed to the main beam 4 above the bumper body 180. A lock device 198 having a lever 196 and an engaging portion 197 is provided at the upper end portion of the movable plate 185. The lever 196 is supported so as to be rotatable about one end portion. In the locked state, the lever 196 extends downward from one end portion toward the other end portion as shown in FIG. When the lever 196 is rotated by pulling the other end upward from this state, the lock device 198 is switched from the locked state to the unlocked state. The engaging portion 197 has an engaging hole (not shown), and is lowered by switching from the unlocked state to the locked state. The movable plate 185 is positioned in the vicinity of the front side of the stay 186, the lock device 198 is unlocked, the hook portion 187 is inserted into the engagement hole of the engagement portion 197, and the lever 196 is lowered to enter the lock state. The engaging portion 197 is lowered and the movable plate 185 is fixed to the stay 186. That is, the movable plate 185, the lock mechanism 195, and the stay 186 constitute an intermediate bumper support member that releasably fixes the intermediate bumper member 191 to the main beam 4. The intermediate bumper member 191 released from being fixed by the intermediate bumper support member is supported by the front bumper member 190 and the rear bumper member 192. The stay 186 may be provided on the bogie beam 7 and the intermediate bumper member 191 may be releasably fixed to the bogie beam 7.

  As shown in FIG. 24, in a state where the main frame 3 and the bogie frame 6 are coupled at the shortest position (20ft rear end alignment), the movable plate 185 is separated forward from the stay 186, and the front bumper member 190 and the rear side The bumper member 192 overlaps with each other and continues in the front-rear direction. When the main frame 3 is moved forward from this state, the front bumper member 190 is pulled forward from the inner diameter portion of the intermediate bumper member 191 as shown in FIGS.

  When the stay 186 reaches the vicinity of the rear side of the movable plate 185 due to the forward movement of the main frame 3, the movement of the main frame 3 is temporarily stopped, and the movable plate 185 is fixed to the stay 186 by the lock device 198. When the main frame 3 is moved forward from this state, the intermediate bumper member 191 is pulled forward from the inner diameter portion of the rear bumper member 192.

  As shown in FIG. 27, when the main frame 3 and the bogie frame 6 reach the first extension position (20 ft travel and 40 ft), the front bumper member 190 and the rear bumper member 192 have a rear end 190a and a front end 192a. Are continuous in the front-rear direction via the intermediate bumper member 191 in a state of being separated in the front-rear direction. When the main frame 3 is moved further forward and the main frame 3 and the bogie frame 6 reach the second extended position (longest position) (45 ft) as shown in FIG. 28, the intermediate bumper member 191 moves further forward. Pulled out.

  According to this embodiment, when the 20ft container 20 is loaded, the front corner fitting 21 of the container 20 is fastened by the small front fastening device 61, and the rear corner fitting 22 is fastened by the small rear fastening device 51. To do. At the time of 20ft rear end alignment, the total length of both beams 4 and 7 is made the shortest, the telescopic beam 12 is set to the storage position, and the inrush prevention device 80 is set to the storage position. Thereby, the rear end of the semi-trailer 1 can be brought close to or in contact with the platform 19 to load / unload the load.

  During 20 ft travel, the main beam 4 is pulled forward from the 20ft rear end alignment to set the total length of both beams 4 and 7 to the first predetermined length. When the 40 ft container 25 is loaded, the total length of both beams 4 and 7 is set to the first predetermined length, the telescopic beam 12 is set to the second protruding position, and the rush preventing device 80 is set to the receiving position. When the 45 ft container 30 is loaded, the total length of both beams 4 and 7 is set to the second predetermined length (longest), the telescopic beam 12 is set to the first protruding position, and the intrusion prevention device 80 is set to the protruding position.

  Accordingly, it is possible to change the wheel base according to the total length of the containers 20, 25, and 30 to be loaded and to travel, and to distribute the load to each axle in a well-balanced manner. Concentration can be suppressed.

  Further, the bumper body 181 of the side bumper 180 is constituted by a plurality of elongated bumper members 190 to 192 extending in the front-rear direction, and the plurality of bumper members 190 to 192 are fixed to the main beam 4. It includes at least a member 190 and a rear bumper member 192 that is fixed to the bogie beam 7, and allows the bumper body 181 to expand and contract in the front-rear direction by overlapping in a slidable manner, so that the main frame 3 and the bogie frame 6 The length of the bumper body 181 in the front-rear direction is also changed according to the change in the relative position in the front-rear direction. Therefore, even when the wheel base is changed, the side bumper 180 can reliably prevent the two-wheeled vehicle or the pedestrian from getting in front of the wheel 11.

  Further, in the first extended position and the second extended position, the front bumper member 190 and the rear bumper member 192 are continuous in the front-rear direction via the intermediate bumper member 191 while being separated in the front-rear direction. Even when the relative movement distance from the position to the extended position is long, the bumper body 181 can be set over the entire range of the desired range.

  Further, the movable plate 191 is fixed to the stay 186 even when the bumper body 181 is extended and the intermediate portion of the intermediate bumper member 191 is not directly supported (not overlapped) by the front bumper member 190 and the rear bumper member 192. Therefore, vibration of the bumper members 190 to 192 during traveling can be suppressed. Further, when the fixing of the intermediate bumper member 191 hinders the shortening of the bumper body 181, it is only necessary to release the fixing of the intermediate bumper member 191, and the shortened bumper body 182 has vibration or the like compared to the extended state. Hard to occur. That is, by appropriately fixing and releasing the fixing of the intermediate bumper member 191, it is possible to suppress vibrations and the like while maintaining the stretchability of the bumper body 181.

  Next, a second embodiment of the present invention will be described with reference to FIGS. In the present embodiment, a side bumper 200 is provided in place of the side bumper 180 of the first embodiment, and the same reference numerals are given to components common to the first embodiment, and description thereof is omitted. Similarly to the first embodiment, since the side bumper 200 is provided symmetrically, only one (left side) will be described, and the other (right side) will not be described.

  The side bumper 200 includes a bumper body 201, front and rear front side bumper fixing brackets 202 and 203, front and rear two rear side bumper fixing brackets 204 and 205, and front and rear two front side guard fixing brackets 206, 207, two rear side guard fixing brackets 208 and 209 at the front and rear, and a floating stay 210. The front side bumper fixing brackets 202 and 203 are arm-shaped members that project outward from the main beam 4 in the vehicle width direction and extend downward, and the rear side bumper fixing brackets 204 and 205 are outward from the bogie beam 7 in the vehicle width direction. It is an arm-shaped member that protrudes and extends downward.

  The bumper body 201 has a plurality of (9 in this embodiment) long bumper members 220 to 225 extending in the front-rear direction. The bumper members 220 to 225 are arranged above the six lateral bumper members 220 to 222 disposed below the vehicle width direction outer side and the inner side in the vehicle width direction of the side bumper members 220 to 222 3. It consists of bumper members (side bumper guards) 223 to 225 above the book. The side bumper members 220 to 222 are provided to prevent a two-wheeled vehicle, a pedestrian, or the like from getting in front of the wheel 11 of the running semi-trailer 1, and the upper bumper members 223 to 225 are disposed from above the wheel 11. It is provided to prevent people or objects from falling forward.

  The bumper members 220 to 225 include three front bumper members 220 and 223 that constitute the front unit, three intermediate bumper members 221 and 224 that constitute the middle unit, and three rear bumpers that constitute the rear unit. It is divided into members 222 and 225. The two side bumper members 220 to 222 in each unit are arranged in an upper stage and a lower stage, and extend in the front-rear direction in parallel with each other. Further, in each unit, the upper bumper members 223 to 225 are disposed above the inner side in the vehicle width direction of the side bumper members 220 to 222 and extend in the front-rear direction.

  The front bumper members 220 and 223, the intermediate bumper members 221 and 224, and the rear bumper members 222 and 225 are arranged at substantially the same height in each of the upper and lower sides of the side and the upper side, and slide movement is performed. The bumper body 201 can be expanded and contracted in the front-rear direction by overlapping in a possible manner.

  As shown in FIG. 29A, the side bumper members 220 to 222 have a C-shaped cross section that opens inward in the vehicle width direction, and the outer shape of the intermediate bumper member 221 is more than the inner shape of the front bumper member 220. The rear bumper member 222 has an outer shape smaller than the inner shape of the intermediate bumper member 221, the intermediate bumper member 221 is inserted into the front bumper member 220, and the rear bumper member 222 is inserted into the intermediate bumper member 221. Is inserted. Since each of the bumper members 220 to 222 has a C-shaped cross section that is open on the inner side in the vehicle width direction, the front bumper member 220 is fixed to the main frame 3, and the inner side in the vehicle width direction of the rear bumper member 222 is an opening having a C-shaped cross section. In this state, the relative movement between the bumper members 220 to 222 accompanying the relative movement between the main frame 3 and the bogie frame 6 is allowed.

  Reinforcing bands 226 and 227 (see FIGS. 32, 34, and 35) for increasing rigidity are joined to the rear end outer surface of the front bumper member 220 and the rear end outer surface of the intermediate bumper member 221, respectively. The reinforcing bands 226 and 227 have lip portions 226 a and 227 a that are bent and extended inward in the vehicle width direction from both ends of the C-shaped portion along the outer surfaces of the front bumper member 220 and the intermediate bumper member 221.

  Plate-like spacers 230 and 231 are provided on the lower plate upper surface (inner surface) of the rear end portion of the front bumper member 220 and the lower plate lower surface (outer surface) and upper plate upper surface (outer surface) of the front end portion of the intermediate bumper member 221, respectively. , 232 are fixed. In a state where the intermediate bumper member 221 is completely pulled out from the front bumper member 220 (first extended position and second extended position), the spacer 231 rides on and overlaps the spacer 230, and these spacers 230 to 232 allow the front side Shaking in the vertical direction between the bumper member 220 and the intermediate bumper member 221 is suppressed. In addition, inclined surfaces are formed at both front and rear ends of the spacers 230 and 231 so that the both overlap smoothly.

  Similarly, plate-like spacers 233 and 234 are fixed to the lower plate upper surface (inner surface) of the rear end portion of the intermediate bumper member 221 and the lower plate lower surface (outer surface) of the front end portion of the rear bumper member 222, respectively. Yes. In a state where the rear bumper member 222 is completely pulled out from the intermediate bumper member 221 (second extended position), the spacer 234 rides over the spacer 233 and overlaps with the intermediate bumper member 221 by the spacers 233 and 234. Shaking in the vertical direction between the side bumper member 222 is suppressed. In addition, inclined surfaces are formed at both front and rear ends of the spacers 233 and 234 so that the two overlap smoothly.

  Further, a plate-like spacer 235 (see FIGS. 34A and 34B) is also fixed to the lower plate lower surface (outer surface) of the intermediate portion of the rear bumper member 222. In the first extended position, the spacer 234 rides over and overlaps the spacer 233, and the vertical shaking between the intermediate bumper member 221 and the rear bumper member 222 is suppressed by the spacers 233 and 235. . In addition, inclined surfaces for smoothly overlapping the spacer 233 are formed at both front and rear ends of the spacer 235. Further, in the rear bumper member 222 (side plate inner surface), a U-shaped spacer that prevents rattling in the vehicle width direction by approaching the inner surface of the inner plate of the reinforcing band 227 at the first extended position. 236 (see FIG. 34B) is fixed.

  The outer surfaces of the front and rear end portions of the side front bumper member 220 are coupled to and supported by front and rear front side bumper fixing brackets 202 and 203, respectively. The inner side in the vehicle width direction of the intermediate portion of the side rear bumper member 222 is supported by the front rear side bumper fixing bracket 204 via the floating stay 210. The inner side in the vehicle width direction of the rear end portion of the side rear bumper member 222 is coupled to and supported by the rear rear side bumper fixing bracket 205. The rear end portions (reinforcing bands 227) of the upper and lower intermediate bumper members 221 are connected by an intermediate bumper connection bracket 211.

  As shown in FIG. 29B, the upper bumper members 223 to 225 have a C-shaped cross section that opens downward, and the outer shape of the intermediate bumper member 224 is smaller than the inner shape of the front bumper member 223. The outer shape of the side bumper member 225 is smaller than the inner shape of the intermediate bumper member 224, the intermediate bumper member 224 is inserted into the front bumper member 223, and the rear bumper member 225 is inserted into the intermediate bumper member 224. . Since each bumper member 223 to 225 has a C-shaped cross section that opens downward, the front bumper member 223 is fixed to the main frame 3, and the lower portion of the rear bumper member 225 is connected to the bogie frame 6 through the C-shaped cross-section opening. In the fixed state, relative movement between the bumper members 223 to 225 accompanying the relative movement between the main frame 3 and the bogie frame 6 is allowed.

  The outer surfaces of the front and rear end portions of the upper front bumper member 223 are coupled to the front and rear front side guard fixing brackets 206 and 207, respectively. The front front side guard fixing bracket 206 is coupled to the end portion of the upper rear bolster 50. The rear front side guard fixing bracket 207 at the rear is coupled to the main beam 4. The middle part of the upper rear bumper member 225 and the lower side of the rear end part are respectively coupled to the front and rear rear side guard fixing brackets 208 and 209, and the rear side guard fixing brackets 208 and 209 are connected to the bogie beam 7. Combined.

  As shown in FIG. 33, a stopper pin 241 is fixed via a stopper pin bracket 240 on the inner side in the vehicle width direction of the front end portion of the side intermediate bumper member 221. The stopper pin 241 is welded to the stopper pin bracket 240 and extends in the vertical direction. Of the upper and lower stopper pins 241, the upper portion 241a of the upper stopper pin 241 is bent outward in the vehicle width direction. A stopper pin engaging plate 243 is fixed to the lip portion 226a of the reinforcing band 226 at the rear end portion of the front bumper member 220, and the stopper pin engaging recess that engages the stopper pin 241 from the rear is fixed to the stopper pin engaging plate 243. 242 is formed. On the front end side of the stopper pin engaging recess 242, an inclined surface that is inclined inward in the vehicle width direction toward the front and guides the stopper pin 241 to the stopper pin engaging recess 242 is formed. When the stopper pin engaging plate 243 engages with the stopper pin 241, the intermediate bumper member 221 is prevented from being pulled out from the front bumper member 220 (elongation by the front bumper member 220 and the intermediate bumper member 221) and the intermediate bumper member. Relative movement of the front end portion of 221 in the vehicle width direction is also prevented.

  As shown in FIG. 32, on the rear surface side of the rear front side bumper fixing bracket 203, a plate shape that releasably engages with the upper portion 241a of the upper stopper pin 241 to prevent the stopper pin 241 from moving in the front-rear direction. The lock operation unit 244 is provided. The lock operation portion 244 is provided with an unlock release holding groove 245, a long hole 246, a lock holding groove 247, and an operation pin 248 from one end to the other end (from the upper side to the lower side in FIG. 32). It is slidably and rotatably supported on the bracket 203 side via a rotating shaft 249 inserted through the hole 246. 32, the other end 250 of the lock operation portion 244 enters the lock engagement recess 251 provided on the bracket 203 side from above, and the lock holding groove 247 is fixed on the bracket 203 side. The lock holding pin 252 is engaged. As a result, the lock operation unit 244 is held at the lock position. When releasing the lock, the operator grasps the operation pin 248 and lifts the lock operation portion 244 upward until the other end portion 250 is disengaged from the lock engagement recess 251, and then rotates the lock operation portion 244 to lock the lock holding groove 247. The lock operation unit 244 is further rotated by rotating the lock operation unit 244 from the lock position to release the upward lifting, and the lock release holding groove 245 is engaged with the lock holding pin 252. As a result, the lock is released and the stopper pin 241 is allowed to move in the front-rear direction.

  As shown in FIG. 35, an L-shaped stopper plate 253 is fixed on the inner side in the vehicle width direction of the front end portion of the side rear bumper member 222. The lip portion 227a of the reinforcing band 227 at the rear end portion of the intermediate bumper member 221 contacts the rear surface of the stopper plate 253 from the rear. When the lip portion 227a abuts against the stopper plate 253, the withdrawal of the rear bumper member 222 from the intermediate bumper member 221 (extension by the intermediate bumper member 221 and the rear bumper member 222) is prevented.

  As shown in FIG. 36, the floating stay 210 includes a fixed bracket 260 and a movable bracket 261. The fixing bracket 260 is fixed to the outer end in the vehicle width direction of the front rear side bumper fixing bracket 204 and extends in the front-rear direction. The rear end side of the movable bracket 261 is supported by the fixed bracket 260 so as to be rotatable about the rotation shaft 262. The inner side in the vehicle width direction of the middle part of the upper and lower rear bumper members 222 is connected by a rear bumper connecting bracket 212. The front end side of the movable bracket 261 is rotatably connected to the bracket 212 around the rotation shaft 263. Therefore, the floating stay 210 allows the rear bumper member 222 to tilt with respect to the bogie frame 6. In addition, the fixed bracket 260 and the movable bracket 261 are formed with pin insertion holes 264 that communicate vertically with the rear bumper member 222 extending without being inclined with respect to the front-rear direction, and the upper and lower pin insertion holes 264. By inserting a pin (not shown) into the pin insertion hole 264 in a state where the two match, the state where the rear bumper member 222 is not inclined with respect to the front-rear direction is maintained. The fixed bracket 260 is provided with an adjustment bolt 265 for changing (increasing / decreasing) the tilting range of the movable bracket 261 with respect to the fixed bracket 260.

  In the process of expanding and contracting the side bumper 200, the main frame 3 may move in an oblique direction with respect to the bogie frame 6 by the forward or backward movement of the tractor, but the rear bumper member 222 with respect to the bogie frame 6 is moved by the floating stay 210. Since tilting is allowed, the side bumper 200 can be expanded and contracted smoothly. Further, during traveling, the pin can be inserted into the pin insertion hole 264 to stop the function of the floating stay 210 and prevent the rear bumper member 222 from tilting.

  As shown in FIG. 28, when the main frame 3 and the bogie frame 6 are coupled at the shortest position (20ft rear end alignment), the front end portion of the intermediate bumper member 221 (the upper portion 241a of the stopper pin 241) is the front bumper member. It is located near the front end of 220. The front bumper member 220 and the rear bumper member 222 overlap each other and continue in the front-rear direction. When the main frame 3 is moved forward from this state, the front bumper member 210 moves forward with respect to the intermediate bumper member 211.

  When the rear end portion of the front bumper member 220 comes close to the front end portion of the intermediate bumper member 221 by the forward movement of the main frame 3 and the stopper pin engaging plate 243 engages with the stopper pin 241, the rear bumper member 222 is moved toward the rear bumper member 222. The front bumper member 220 and the intermediate bumper member 221 move integrally forward.

  As shown in FIG. 30A, when the main frame 3 and the bogie frame 6 reach the first extended position (20 ft travel and 40 ft), the lock operation portion 244 is rotated to lock the stopper pin 241. . In the first extended position, the front bumper member 220 and the rear bumper member 222 are continuous in the front-rear direction via the intermediate bumper member 221 with the rear end and the front end being separated in the front-rear direction.

  When the main frame 3 is further moved forward and the main frame 3 and the bogie frame 6 reach the second extended position (longest position) (45 ft) as shown in FIG. The rear end portion approaches the front end portion of the rear bumper member 22.

  The upper bumper members 223 to 225 also move in the same manner as the side bumper members 220 to 222.

  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 stacking the 20 ft container 20, the 40 ft container 25 and the 45 ft container 30 has been described, but the length in the front-rear direction is not limited thereto.

  The main connection mechanism 63, the intrusion prevention device fixing mechanism 84, and the main connection mechanism 130 are not limited to the above shapes and structures as long as they have the required functions.

1: Semi-trailer 2: Chassis frame 3: Main frame 4: Main beam 4a: Upper flange 4b: Lower flange 4c: Web 5: Cross frame 6: Bogie frame 7: Bogie beam 7a: Upper plate 7b: Lower plate 7c: Inner plate 7d: Outer plate 7e: Upper flange 7f: Web 8: Cross frame 10: Suspension device 11: Wheel (tire)
12: telescopic beam 15: kingpin 16: step (gooseneck)
20: 20ft container (small container)
25: 40ft container (first large container)
30: 45ft container (second large container)
40: Front bolster 41: Front side tightening device for large containers (Large front side tightening device)
42: Thread pin 50: Upper rear bolster 51: Rear tightening device for small containers (small rear tightening device)
52: Twist lock 60: Intermediate bolster 61: Front side fastening device for small containers (Small side fastening device)
70: Lower rear bolster 71: Rear tightening device for large containers (large rear tightening device)
80: Inrush prevention device 110: Rear guide roller 110
112: Rotating shaft 120: Front guide roller 120
122: Rotating shaft 127: Upper movement restriction surface 129: Lateral movement restriction surface 130: Main coupling mechanism (coupling mechanism)
131: Pin insertion hole 132: Lock pin device 133: Air chamber (driving means)
134: Link mechanism 135: Case body 137: Lock pin 138: Coil spring (biasing means)
150: telescopic beam coupling mechanism 151 pin insertion hole 151
153: Air chamber 156: Lock pin 157: Coil spring 170: Telescopic beam drive device 172: Air cylinder 180, 200: Side bumper 181, 201: Bumper body 182: Front side fixed plate 183, 184: Rear side fixed plate 185: Movable plate 186: Stay 187: Hook part 190, 193, 220, 223: Front bumper member 191, 194, 221, 224: Intermediate bumper member 192, 195, 222, 225: Rear bumper member 196: Lever 197: Engagement part 198 : Locking device 202, 203: Front side bumper fixing bracket 204, 205: Rear side bumper fixing bracket 206, 207: Front side guard fixing bracket 208, 209: Rear side guard fixing bracket 210: Floating Stay

Claims (3)

It has a pair of left and right main beams extending along the front-rear direction, and is connected to the tractor and pulled to the front main frame, and extends along the front-rear direction so that the left and right main beams can slide in the front-rear direction. A plurality of predetermined positions each having a pair of left and right bogie beams that are supported by the rear bogie frame supported from below by left and right wheels, and the relative positions of the main frame and the bogie frame differing in the front-rear direction. Each of the left and right main beams and the left and right bogie beams are releasably connected, and a side bumper disposed in front of the wheels of the semi-trailer,
A bumper body having a plurality of elongated bumper members extending in the front-rear direction,
The plurality of bumper members include at least a front bumper member fixed to the main beam and a rear bumper member fixed to the bogie beam, and are slidably overlapped to overlap the front and rear of the bumper body. A semi-trailer side bumper characterized by its ability to expand and contract in the direction. The side bumper according to claim 1,
The main frame and the bogie frame move relative to each other between a shortened position and an extended position extended from the shortened position;
The plurality of bumper members include one or more intermediate bumper members;
The front bumper member and the rear bumper member at the extended position are continuous in the front-rear direction through the intermediate bumper member in a state of being separated in the front-rear direction,
The side bumper of a semi-trailer, wherein the front bumper member and the rear bumper member at the shortened position overlap each other and are continuous in the front-rear direction. The side bumper according to claim 2,
An intermediate bumper support member for releasably fixing the intermediate bumper member to the main beam or the bogie beam;
The semi-trailer side bumper, wherein the intermediate bumper member released from being fixed by the intermediate bumper support member is supported by the front bumper member and the rear bumper member.

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