JP5721237B2 - Container tightening device - Google Patents

Description

  The present invention relates to a fastening device for fastening a container to a vehicle body side.

  Some fastening devices for fastening a container to a semi-trailer include a twist lock that can be selectively set to a use position and a storage position. The twist lock at the use position protrudes upward from the container placement surface in an upright state, and enters the engagement hole of the corner fitting of the container from below when the container to be tightened is loaded at a predetermined position. The twist lock at the storage position is retracted below the container placement surface in order to avoid interference with the container when a container that is not a tightening target of the tightening device is loaded.

  In addition, as a structure that enables the twist lock to be moved between the use position and the storage position, a lift type (for example, Patent Document 1 or Patent Document 2) or a tilt type (for example, Patent Document 3 or Patent Document 4). )It has been known. The lift-type twist lock is retracted from the use position to the storage position by being lowered while maintaining the standing state. Further, the tilt type twist lock is retracted from the use position to the storage position by falling in the vehicle width direction from the standing state.

JP 10-2111845 A Japanese Patent No. 3983402 JP 11-334458 A Japanese Patent No. 4919924

  To selectively load multiple types of containers with different lengths in the longitudinal direction on the semi-trailer, the semi-trailer chassis frame is connected to the front main frame connected to the tractor and the rear bogie frame supported by the wheels. In some cases, the main frame and the bogie frame are slidably coupled. This type of semi-trailer has a lower rigidity compared to a semi-trailer with an integrated structure that does not divide the chassis frame. It is preferable to ensure the rigidity. In this regard, there is a screw-in type twist lock that can firmly tighten the container in the lift type twist lock, and a screw-in type twist lock is suitable for the split type semi-trailer.

  On the other hand, in some of the above-described semi-trailers, there is a case where the tightening device must be disposed above the tire in order to suitably distribute the axial load input from the container to the plurality of axles. When it is disposed above, it is necessary to reliably avoid interference between the twist lock at the storage position and the tire.

  However, in the lift type in which the twist lock is lowered to the storage position while maintaining the standing state, it is difficult to avoid interference with the tire because the twist lock at the storage position protrudes downward with respect to the container placement surface. Therefore, there is a possibility that a screw-in type (lifting type) twist lock cannot be provided.

  In view of the above situation, an object of the present invention is to provide a tightening device capable of firmly tightening a container while suppressing a downward protruding amount of a stored twist lock with respect to a container placement surface.

  In order to achieve the above object, the present invention is a tightening device for tightening a container to a support frame on the vehicle body side, and includes a base body, a twist lock, a handle, and a lock cover.

  The base body has an upper plate portion whose upper surface serves as a container placement surface, a storage space defined below the upper plate portion, and an opening formed in the upper plate portion to open the storage space upward. The support frame is fixedly provided at the end in the vehicle width direction.

  The twist lock includes a twist lock main body, a locking rotation shaft portion, and a locking portion. The twist lock body has a cylindrical shape in which a shaft insertion hole penetrates from a proximal end side to a distal end side along a predetermined twist rotation axis. The locking rotation shaft portion is inserted through the shaft insertion hole while being supported by the twist lock main body so as to be rotatable about the twist rotation shaft and slidable along the twist rotation shaft. The locking portion is fixed to one end of the locking rotating shaft portion and exposed at the tip end side of the twist lock body. A male screw portion is formed on the outer peripheral surface on the other end side of the locking rotation shaft portion.

  The handle has an annular shape having an outer diameter larger than that of the shaft insertion hole, and a female screw portion that is screwed with the male screw portion of the locking rotary shaft portion is formed on the inner peripheral surface of the handle. The handle is attached to the other end side of the locking rotary shaft portion by screwing the female screw portion into the male screw portion of the locking rotary shaft portion protruding from the proximal end side of the twist lock body.

  The lock cover is supported by the base body so as to be movable between a closed position that covers a part of the opening and an open position that opens.

  The lock portion of the twist lock rotates between the engagement release position and the engagement position rotated by a predetermined angle from the engagement release position by the rotation of the lock rotation shaft portion.

  The twist lock body is rotatably supported by the base body around a predetermined tilting rotation axis, and the twist lock is in a state where the lock cover is set to the open position and the locking portion is set to the disengagement position. It is tiltable between the use position and the storage position through the opening of the base body around the tilt rotation axis. The twist lock body stands substantially vertically at the use position and protrudes upward from the container mounting surface of the base body, and falls down in the storage space at the storage position.

  The upper surface of the lock cover set at the closed position is disposed on substantially the same plane as the upper surface of the upper plate portion of the base body to constitute a container placement surface.

  The twist lock main body at the use position is restricted from tilting to the storage position by the lock cover set at the closed position.

  When the twist lock is set at the use position, the engaging portion at the disengagement position enters the engaging hole of the corner metal fitting of the container to be loaded from below, and the engaging rotation shaft portion rotates in the locking direction. As a result, the handle is rotated from the disengagement position to the engagement position, and the handle is rotated in the locking direction with respect to the locking rotation shaft portion. Tighten between.

  The base body may have a pair of vertical plate portions that extend downward in opposition from the upper plate portion, and the storage space may be partitioned by the upper plate portion and the pair of vertical plate portions, The twist lock body may be rotatably supported by a pair of vertical plate portions of the base body.

  In the above configuration, when the container is loaded and fastened on the vehicle body side, the operator sets the lock cover from the closed position to the open position, and tilts the twist lock of the storage position that falls in the storage space upward to use the position. The container is loaded at a predetermined position on the vehicle body side, and a twist lock is entered from below into the locking hole of the corner fitting of the container. As a result, the container (corner bracket) is placed on the container placement surface. In this state, the operator rotates the handle in the locking direction while lifting the handle so that relative rotation between the handle and the locking rotation shaft portion does not occur, and rotates the locking portion from the engagement release position to the engagement position. . When the locking portion is set to the engagement position, the handle is rotated in the locking direction without lifting the handle, and the handle is rotated with respect to the locking rotation shaft portion. By rotating the handle in the locking direction with respect to the locking rotation shaft portion, the distance between the locking portion and the handle is shortened, and the corner fitting is tightened between the locking portion and the container placement surface.

  In this way, since the corner bracket is tightened between the locking portion and the container placement surface, the container to be loaded can be firmly tightened to the semi-trailer. Therefore, even if the chassis frame is a split type semi-trailer divided into a main frame and a bogie frame, the rigidity including the container as a whole can be ensured.

  In addition, in order to avoid interference with a container when a container that is not subject to tightening by the tightening device is used, when the twist lock is withdrawn below the container placement surface, the operator must move the lock cover from the closed position to the open position. The twist lock at the use position is tilted to the lower storage position to fall into the storage space, and the lock cover is returned to the closed position. As described above, the twist lock at the storage position falls down in the storage space, so that the downward protruding amount of the stored twist lock with respect to the container placement surface can be suppressed. Therefore, even when the tightening device is arranged vertically above the tire, it is possible to reliably avoid interference between the stored twist lock and the tire.

  The position of the tilt rotation axis in the twist lock may be set so that the use position side is heavier than the counter use position side with respect to the vertical plane passing through the tilt rotation axis.

  In the above configuration, when the twist lock is set to the use position and the lock cover is set to the closed position, the twist lock is tilted to the storage position by its own weight only by moving the lock cover to the open position. The storing operation can be simplified.

  ADVANTAGE OF THE INVENTION According to this invention, a container can be tightened firmly, suppressing the protrusion amount to the downward direction with respect to the container mounting surface of the stored twist lock.

It is a top view which shows the semi-trailer (shortest) of one 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. 1 is an external perspective view of a tightening device according to an embodiment of the present invention. It is a disassembled perspective view of a fastening device. It is a disassembled perspective view of a twist lock and a handle. It is the rear view which looked at a fastening device from the vehicles back. It is a top view of a fastening device. It is a side view of a fastening device. It is sectional drawing explaining the procedure of the first half of the tightening work, (a) shows a state in which the twist lock is stored, (b) shows a state in which the lock cover is opened, and (c) shows a state in which the twist lock is raised. Each is shown. It is sectional drawing explaining the procedure of the latter half of a fastening operation | work, (d) shows the state which closed the lock cover and mounted the container, (e) shows the state which set the lock pin to the engagement position, respectively. It is sectional drawing explaining the final stage of a fastening operation | work, and shows the state which rotates and tightens a handle | steering-wheel with respect to a latching rotating shaft part.

  An 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.

  The front and rear corner fittings 21 and 22 of the 20 ft container 20 are provided with only engagement holes (downwardly formed in the fitting bottom plate 23 of the rear corner fitting 22). The illustration of the engagement hole of the front corner fitting 21 is omitted). 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 6, 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 and a lower flange that are spaced apart from each other and are opposed to each other are connected by a web extending vertically.

  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 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 (support frames) 50 that extend 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 protrude from the main beams 4 and extend outward in the vehicle width direction. Yes. 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 accommodated in the bolsters 50 and 60 in a use position that protrudes upward from the upper surface of the bolsters 50 and 60, and lowered from the use position. Twist locks 52 and 62 that are movable up and down between the storage positions are provided. When the 20 ft container 20 is loaded, the twist locks 52 and 62 are set to the use position, and when the 40 ft container 25 and the 45 ft container 30 are loaded, the twist locks 52 and 62 are 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 16 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 a rectangular shape in which a plate-like upper plate and a lower plate that are spaced apart from each other and are opposed to each other are connected by an inner plate and an outer plate that are spaced apart from each other in the vehicle width direction. The front end of the bogie beam 7 has a T-shaped cross section in which the web extends downward from an upper flange continuous with the upper plate. 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 an telescopic beam coupling mechanism (not shown), a front storage position, a first projecting position behind the storage position, and a second projecting position behind the first projecting position. And fixedly supported at any one position. 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 releasably coupled by the main coupling mechanism 130 at each of a plurality of predetermined positions where the main frame 3 and the bogie frame 6 have different relative positions in the front-rear direction. . 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 loading a 40 ft container 25 (when loading 40 ft), the total length of both beams 4 and 7 is set to a first predetermined length, the telescopic beam 12 is set to a second protruding position, and a rush preventing device 80 is provided. Is the storage 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 45ft container 30 is loaded (when 45ft is loaded), the total length of both beams 4 and 7 is set to the second predetermined length (longest), and the telescopic beam 12 is set to the first protruding position. The prevention device 80 is set to the protruding 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.

  As shown in FIGS. 4 and 5, the small rear side tightening device 51 extends vertically above the center tire 11 during 20f traveling and 40ft loading with the total length of both beams 4 and 7 as the first predetermined length. Located in. As shown in FIG. 6, the small rear tightening device 51 is positioned vertically above the front tire 11 when 45ft is loaded with the total length of both beams 4 and 7 as the second predetermined length.

  Thus, since the small rear side tightening device 51 is a tightening device disposed vertically above the tire 11, the twist lock 52 is in a lying state that can reliably avoid interference with the tire 11 as will be described later. Stored in

  Next, the small rear fastening device 51 will be described with reference to FIGS. Since the left and right small rear tightening devices 51 have the same configuration, only one (right side) will be described below, and the other (left side) will not be described.

  As shown in FIGS. 7 to 11, the small rear tightening device 51 includes a base body 53, a twist lock 52, a handle 54, and a lock cover 55.

  The base body 53 includes an upper plate portion 101, a pair of front and rear vertical plate portions (outer vertical plate portions) 102, a pair of front and rear inner plate portions (inner vertical plate portions) 103, a bottom plate portion 104, and the front and rear. A pair of reinforcing plate portions 106, and extends integrally from the outer end surface of the upper rear bolster 50 in the vehicle width direction vertically above the tire 11 (see FIGS. 4 to 6).

  The front and rear outer vertical plate portions 102 extend downward from the lower surface of the upper plate portion 101. The front and rear inner vertical plate portions 103 extend downward from the lower surface of the upper plate portion 101 inside the front and rear outer vertical plate portions 102. The front and rear outer vertical plate portions 102 and the front and rear inner vertical plate portions 103 are arranged substantially parallel to each other. The bottom plate portion 104 covers an area of the lower surface of the base body 53 excluding an outer portion in the vehicle width direction that is opened to operate the handle 54. The outer end plate portion 105 closes the outer end of the base body 53 in the vehicle width direction.

  The inner vertical plate portion 103 extends inward in the vehicle width direction from the outer end of the base body 53 in the vehicle width direction and reaches a predetermined position outside the outer end surface of the upper rear bolster 50 in the vehicle width direction. The front and rear reinforcing plate portions 106 are disposed at a predetermined intermediate position in the vehicle width direction of the base body 53, and the front reinforcing plate portion 106 projects forward from the front surface of the front inner vertical plate portion 103. The rear reinforcing plate portion 106 extends downward from the lower surface of the upper plate portion 101 in a state of protruding rearward from the rear surface of the rear inner vertical plate portion 103 (see FIG. 11). . The outer vertical plate portion 102 extends outward in the vehicle width direction from the outer end surface of the upper rear bolster 50 in the vehicle width direction to the reinforcing plate portion 106.

  The upper surface 101a of the upper plate portion 101 has a horizontal plane extending continuously from the upper surface 50a of the upper rear bolster 50, and together with the upper surface 50a of the upper rear bolster 50, the container mounting surface 107 on which the containers 20, 25, and 30 are mounted. Form.

  A storage space 108 defined by the lower surface of the upper plate portion 101 and the inner surfaces of the front and rear inner vertical plate portions 103 is provided below the upper plate portion 101 and above the bottom plate portion 104. A rectangular opening 109 is formed to open the storage space 108 upward.

  The twist lock 52 includes a twist lock main body 111, a locking rotation shaft portion (lock pin) 112, and a lock pin head (locking portion) 113, and is disposed on the outer side in the vehicle width direction than the lock cover 55.

  The twist lock body 111 has a cylindrical shape through which a circular shaft insertion hole 115 passes along a predetermined twist rotation shaft 114, and the shaft insertion hole 115 includes a distal end 111 a side and a proximal end 111 b side of the twist lock body 11. Communicate. The outer shape of the twist lock body 111 on the tip 111a side is a rectangular shape whose longitudinal direction is longer than the vehicle width direction.

  The locking rotation shaft portion 112 has a cylindrical shape that is inserted through the shaft insertion hole 115, and is supported by the twist lock main body 111 so as to be rotatable about the twist rotation shaft 114 and slidable along the twist rotation shaft 114.

  The lock pin head 113 is fixed to one end 112 a of the locking rotation shaft portion 112 and exposed on the tip 111 a side of the twist lock main body 111. A male screw portion 116 is formed on the outer peripheral surface on the other end 112 b side of the locking rotation shaft portion 112.

  The lock pin head 113 has a rectangular parallelepiped shape that tapers in a direction away from the twist rotation shaft 114, and rotates integrally with the twist rotation shaft 114. The outer periphery of the end surface of the lock pin head 113 fixed to the twist rotating shaft 114 is formed in substantially the same shape as the outer shape on the tip 111 a side of the strok body 111. The twist lock head 113 rotates between the engagement release position and the engagement position rotated approximately 90 ° from the engagement release position by the rotation of the twist rotation shaft 114. In the disengaged position, the longitudinal direction of the lock pin head 113 substantially coincides with the longitudinal direction (vehicle longitudinal direction) of the twist lock body 111 (see FIG. 8), and in the engaged position, the longitudinal direction of the lock pin head 113 is the twist lock body. It is substantially orthogonal to the longitudinal direction of 111 (see FIG. 7).

  A head entry recess 117 that allows entry of the lock pin head 113 at the engagement position is formed at the longitudinal center of the end surface of the tip 111a of the twist lock body 111. The lock pin head 113 is brought into contact with the end surface of the tip 111a of the twist lock main body 111 (on both sides of the head entry recess 117) at the disengagement position and is prevented from entering the head entry recess 117, and is engaged from the disengagement position. Entry into the head entry recess 117 is allowed by rotating to the position. The lock pin head 113 that has entered the head entry recess 117 is prevented from rotating by the opposed inner surface of the head entry recess 117 and is held in the engaged position.

  The handle 54 integrally includes a handle main body 121 and a handle operation unit 122. The handle main body 121 has an annular shape having an outer diameter larger than that of the shaft insertion hole 115, and a female screw portion that engages with the male screw portion 116 of the locking rotary shaft portion 112 on the inner peripheral surface of the handle main body 121. 123 is formed. The handle 54 is engaged with the male screw portion 116 of the locking rotary shaft portion 112 protruding from the base end 111b side of the twist lock main body 111, so that the female screw portion 123 is screwed to the other end 112b side of the locking rotary shaft portion 112. Attached to. A handle detachment prevention plate 124 that prevents detachment of the attached handle 54 is fastened and fixed to the end surface on the other end 112b side of the locking rotation shaft portion 112 by screws 125 (see FIG. 9).

  The handle operation unit 122 has a flange shape protruding from the outer peripheral surface of the handle main body 121 and has an uneven outer peripheral surface. A handle lock arm 126 is attached to the twist lock body 111 by a bolt 127 so as to be tiltable. The tilting range of the handle lock arm 126 includes a handle lock position where the movable tip side engages with the concavo-convex shape of the outer peripheral surface of the handle operation unit 122 and the rotation of the handle 54 is restricted, and the movable tip side is separated from the handle operation unit 122. A handle lock release position that allows the handle 54 to rotate.

  The lock cover 55 includes a rectangular flat plate-shaped cover body 131 and a pair of plate-like support portions 132 that protrude integrally and oppositely from the back surface 131b of the cover body 131. A support hole 133 (see FIG. 8) penetrating on the same axis is formed.

  The inner vertical plate portion 103 on the front and rear sides of the base body 53 and the outer vertical plate portion 102 on the rear side are respectively formed with insertion holes 134 that pass through on the same axis, and the cover support shaft portion 135 serves as the support hole 133 and the insertion hole 134. By inserting the lock cover 55, the lock cover 55 is supported by the base body 53 so as to be tiltable about the cover support shaft portion 135. The tilting range of the lock cover 55 includes a closed position where the cover body 131 covers a part of the opening 109 and an open position where the cover body 131 opens. The cover main body 131 in the open position stands up so as to protrude upward from the upper surface 101a of the upper plate portion 101 of the base body 53. The cover main body 131 in the open position moves to the closed position when it falls down outward in the vehicle width direction, and the cover main body 131 in the closed position protrudes from the opposing inner surfaces of the front and rear inner vertical plate portions 103. 136 is mounted substantially horizontally. The upper surface of the lock cover 55 set at the closed position (the surface 131a of the cover main body 131) is disposed substantially flush with the upper surface 101a of the upper plate portion 101 of the base body 53 to constitute the container placement surface 107.

  The rear end side of the cover support shaft portion 135 protrudes rearward of the rear outer vertical plate portion 102, and a movement restricting plate 137 is fixed to the protruding portion. A movement support plate 137 is sandwiched between the mounting plate 138 and the outer vertical plate portion 102, and the mounting plate 138 is fastened and fixed to the fixing plate 139 fixed to the outer vertical plate portion 102 by the bolt 140, thereby providing a cover support shaft portion. 135 is prevented from moving in the axial direction (vehicle longitudinal direction). Further, a key groove 142 is formed in the support hole 133 of the rear inner vertical plate portion 102, and a key 144 that engages with the key groove 143 is formed in the cover shaft support portion 135 (see FIG. 8). Relative rotation between the lock cover 55 and the cover support shaft 135 is prevented by the engagement between the key 144 and the key groove 143, and the lock cover 55 rotates integrally with the cover support shaft 135.

  A cover operation unit 141 that is bent substantially orthogonally from the rear end of the cover support shaft part 135 is provided behind the rear outer vertical plate part 102. The cover operation unit 141 extends in a substantially horizontal direction with the lock cover 55 set to the closed position, and the lock cover 55 tilts to the open position by pushing down the free end side of the cover operation unit 141 from this state.

  In the twist lock main body 111 of the twist lock 52, a twist lock support hole 152 penetrating in the longitudinal direction (vehicle front-rear direction) is formed in a circular shape with the tilt rotation shaft 151 as the center. Bolt insertion holes 153 (see FIGS. 11 and 12) that can communicate linearly with the twist lock support holes 152 are formed in the front and rear inner vertical plate portions 103, and the front and rear sides of the front inner vertical plate portion 103 are formed. A nut 154 is fixed to the rear surface of the inner vertical plate portion 103 in accordance with the bolt insertion hole 153. The twist lock support holes 152 are aligned with the bolt insertion holes 153, and the bolts 155 are fastened to the front and rear nuts 154 from the front and rear, respectively, so that the front end side shaft portion 155a (see FIGS. 11 and 12) is twist lock supported. The twist lock 52 enters the hole 152 and is rotatably supported by the inner vertical plate portions 103 before and after the base body 53. As a result, the twist lock 52 passes through the opening 109 of the base body 53 around the tilt rotation shaft 151 with the lock cover 55 set to the open position and the lock pin head 113 set to the disengagement position. It can be freely tilted between the use position and the storage position. The twist lock 52 at the use position stands substantially vertically and protrudes upward from the container placement surface 107 of the base body 53. The twist lock 52 moves to the retracted position by tilting inward in the vehicle width direction from this state. The twist lock 52 at the storage position is placed on a twist lock placement portion 156 that connects between the opposing inner surfaces of the front and rear inner vertical plate portions 103, and falls down substantially horizontally in the storage space 108.

  The position of the tilt rotation shaft 151 in the twist lock 52 is such that the use position side (inner side in the vehicle width direction) is heavier than the counter use position side (outer side in the vehicle width direction) with respect to the vertical plane passing through the tilt rotation shaft 151. The tilting rotation shaft 151 is located on the inner side in the vehicle width direction than the twist rotation shaft 114.

  The twist lock main body 111 in the use position is prevented from tilting downward in the vehicle width direction by contacting the inner edge of the opening 109 of the base body 53 in the vehicle width direction, and the lock cover 55 set at the closed position is prevented. Tilt to the storage position in the vehicle width direction lower side is restricted by contact with the outer edge in the vehicle width direction. Further, in the state where the twist lock 52 is set to the use position, the cover body 131 in the closed position is placed on the cover placement portion 136 as described above, and the outside in the vehicle width direction is twisted as described above. The lock body 111 is placed on a second cover placement portion 157 (see FIG. 10) that protrudes from the inner surface of the lock body 111 in the vehicle width direction.

  A rectangular handle entry hole 158 that allows entry of a handle operation unit 122 that moves upward when the twist lock 52 tilts to the retracted position at the outer end in the vehicle width direction of the upper plate portion 101 of the base body 53. Is formed. Interference between the handle operating portion 122 and the upper plate portion 101 is avoided by the handle entry hole 158, and the twist lock 52 can be reliably tilted to the retracted position.

  The lock pin head 113 at the disengagement position when the twist lock 52 is set at the use position enters the engagement hole 23 of the corner fitting 22 of the 20f container 20 loaded on the semi-trailer 1 from below and is engaged and rotated. When the shaft portion 112 rotates in the locking direction (the direction of the arrow 160 shown in FIG. 8), the shaft portion 112 rotates from the engagement release position to the engagement position, and descends to the head entry recess 117. When the handle 54 rotates in the locking direction in such a state, the rotation of the locking rotation shaft portion 112 is prevented by the head entry recess 117, so the handle 54 rotates in the locking direction with respect to the locking rotation shaft portion 112, By the screwing of the male screw portion 116 and the female screw portion 123, the distance between the lock pin head 113 and the handle 54 at the engagement position is shortened, and the handle 54 is raised. When the handle 54 is further lifted and the handle 54 further rotates in the locking direction after the handle 54 comes into contact with the base end 111b of the twist lock main body 111, the bracket bottom plate 23 of the corner bracket 22 moves to the lock pin head 113 and the container mounting surface. Tightened with 107.

According to the present embodiment, when the 20 ft container 20 is loaded and fastened to the semi-trailer 1, the operator pushes down the cover operation unit 141 to hold the lock cover 55 as shown in FIGS. 13 (a) and 13 (b). Set from the closed position to the open position. Next, as shown in FIG.
A hand is inserted through the opening 109 to lift the twist lock 52 lying down in the storage space 108, and the twist lock 52 is tilted from the storage position to stand at the use position. Next, as shown in FIG. 14D, after the lock cover 55 is returned to the closed position, the 20ft container 20 is loaded at a predetermined position, and the twist lock 52 enters the locking hole 23 of the corner bracket 22 from below. Let As a result, the 20 ft container 20 (corner bracket 22) is placed on the container placement surface 107. Next, the operator grasps the handle operating unit 122 from below with one hand, lifts the handle lock arm 126 to the handle lock release position with the other hand, and, as shown in FIG. The lock pin head 113 is rotated from the disengagement position to the engagement position by rotating in the locking direction while lifting the handle 54 so that relative rotation with the locking rotation shaft portion 112 does not occur. The lock pin head 113 set at the engagement position descends to the head entry recess 117. Next, with the handle lock arm 126 lifted to the handle unlock position, as shown in FIG. 15, the handle 54 is rotated in the locking direction without being lifted, and the handle 54 is rotated with respect to the locking rotation shaft portion 112. . The distance between the lock pin head 113 and the handle 54 is shortened by the rotation of the handle 54 with respect to the locking rotation shaft 112 in the locking direction, and the corner fitting 22 is tightened between the lock pin head 113 and the container placement surface 107. . After the tightening is completed, the handle lock arm 126 is lifted and the handle lock arm 126 is returned to the handle lock position.

  When lowering the 20 ft container 20 to the semi-trailer 1, the handle 54 is rotated in the unlocking direction, the lock pin head 113 is rotated from the engagement position to the disengagement position, and then the 20 ft container 20 is lifted to The twist lock 52 is removed from the locking hole 23.

  Thus, since the corner fitting 22 is tightened between the lock pin head 113 and the container placement surface 107, the stacked 20ft container 20 can be firmly tightened to the semi-trailer 1. Therefore, even if the chassis frame 2 is a split type semi-trailer 1 in which the chassis frame 2 is divided into the main frame 3 and the bogie frame 6, the overall rigidity including the 20ft container 20 can be ensured.

  Further, in order to avoid interference with the containers 25 and 30 when the 40 ft container 25 and the 45 ft container 30 that are not tightening targets of the rear tightening device 51 for small containers are loaded, the twist lock 52 is more than the container mounting surface 107. When retreating downward, the operator sets the lock cover 55 from the closed position to the open position, tilts the twist lock 52 at the use position to the lower storage position, falls to the storage space 108, and closes the lock cover 55. Return to position. As described above, the twist lock 52 at the storage position falls down in the storage space 108, so that the amount of protrusion of the stored twist lock 52 with respect to the container placement surface 107 can be suppressed. Therefore, even when the tightening device is disposed above the tire 11, it is possible to reliably avoid interference between the stored twist lock 52 and the tire 11.

  Further, in a state where the twist lock 52 is set to the use position and the lock cover 55 is set to the closed position, the twist lock 52 is moved by its own weight only by pushing down the cover operation unit 141 and moving the lock cover 55 to the open position. Since it tilts to the storage position, the storage work of the twist lock 52 can be simplified.

  The above-described embodiment is an example of the present invention, and the present invention is not limited to the above-described embodiment, and is not limited to the above-described embodiment as long as it does not depart from the technical idea according to the present invention. Of course, various modifications are possible.

  For example, a tightening device other than the small container rear tightening device 51 may be configured in the same manner as the small container rear tightening device 51. The semi-trailer may be a dual-purpose type capable of selectively loading the 20ft container 20 and the 40ft container 25, or a dual-purpose type capable of selectively loading the 20ft container 20 and the 45ft container 30. Further, the chassis frame may be an integral type.

  In the above embodiment, the semi-trailer 1 on which the box-shaped container 20 is loaded has been described. However, the fastening device 51 of the present invention can also be applied to the vehicle body of a truck on which the container is loaded.

1: Semi-trailer 2: Chassis frame 3: Main frame 4: Main beam 5: Cross frame 6: Bogie frame 7: Bogie beam 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 50a: Upper surface of upper rear bolster 51: Rear tightening device for small container (small rear tightening device)
52: Twist lock 53: Base body 54: Handle 55: Lock cover 60: Intermediate bolster 61: Front tightening device for small containers (small front side tightening device)
70: Lower rear bolster 71: Rear tightening device for large containers (large rear tightening device)
101: Upper plate portion 101a: Upper surface of upper plate portion 102: Outside vertical plate portion (outer vertical plate portion)
103: Inner vertical plate (inner vertical plate)
107: Container placement surface 111: Twist lock body 112: Locking rotation shaft (lock pin)
113: Lock pin head (locking portion)
114: Twist rotation shaft 115: Shaft insertion hole 116: Male screw part 117: Head entry recess 109: Opening part 121: Handle main body 122: Handle operation part 123: Female screw part 131: Cover main body 131a: Cover main body surface (lock Top of cover)
132: Support part 141: Cover operation part 151: Tilt rotation shaft 152: Twist lock support hole 153: Bolt insertion hole 154: Nut 155: Bolt 158: Handle entry hole 160: Locking direction

Claims (1)

A fastening device for fastening the container to the support frame on the vehicle body side,
An upper plate portion whose upper surface is a container placement surface, a storage space defined below the upper plate portion, and an opening formed in the upper plate portion to open the storage space upward, A base body fixedly provided at an end of the support frame in the vehicle width direction;
A cylindrical twist lock main body through which a shaft insertion hole penetrates from a proximal end side to a distal end side along a predetermined twist rotation axis, and is rotatable about the twist rotation axis and slidable along the twist rotation axis A locking rotary shaft portion that is inserted through the shaft insertion hole while being supported by the twist lock main body, and a locking portion that is fixed to one end of the locking rotary shaft portion and is exposed at the tip end side of the twist lock main body. And a twist lock in which a male screw portion is formed on the outer peripheral surface on the other end side of the locking rotary shaft portion,
An annular shape having an outer diameter larger than that of the shaft insertion hole, a female screw portion that is screwed with the male screw portion of the locking rotation shaft portion is formed on an inner peripheral surface, and a proximal end side of the twist lock body A handle attached to the other end side of the locking rotary shaft portion by screwing the female screw portion into the male screw portion of the locking rotary shaft portion protruding from
A lock cover that is supported by the base body so as to be movable between a closed position that covers a part of the opening and an open position that opens.
The engagement portion of the twist lock rotates between an engagement release position and an engagement position rotated by a predetermined angle from the engagement release position by the rotation of the engagement rotation shaft portion,
The twist lock body is rotatably supported by the base body about a predetermined tilting rotation axis, and the twist lock is configured such that the lock cover is set at the open position and the locking portion is at the disengagement position. In the state set to be freely tiltable between the use position and the storage position through the opening of the base body around the tilt rotation axis,
The twist lock body stands substantially vertically in the use position and protrudes upward from the container mounting surface of the base body, and in the storage position, the twist lock body falls down in the storage space.
The upper surface of the lock cover set at the closed position is disposed substantially flush with the upper surface of the upper plate portion of the base body to constitute the container mounting surface,
The twist lock body in the use position is restricted from tilting to the storage position by the lock cover set in the closed position,
The locking portion at the disengagement position when the twist lock is set at the use position enters the engagement hole of the corner metal fitting of the container loaded on the container chassis from below, and the locking When the rotation shaft portion rotates in the lock direction, the rotation shaft portion rotates from the engagement release position to the engagement position, and the handle rotates with respect to the locking rotation shaft portion in the lock direction. The container fastening device is characterized in that the corner bracket is fastened between the container mounting surface and the distance is shortened.

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