JP2014129019A - Fastening device for container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fastening device capable of making a work for storing twist-lock at a use position simple.SOLUTION: A position of an inclined rotation axis 151 of a twist-lock 52 is designed at a position where the twist-lock 52 standing at a use position is inclined toward a storage position due to the self-weight of the twist-lock 52. When the twist-lock 52 at the use position is turned down to be set at the storage position, an operator operates a lock cover operation lever 141 so that a lock cover 55 at a closed position is inclined to an opening position. At that time, the twist-lock 52 at the use position tries to turn down to the storage position due to its self-weight. Thereby, the vertical positions of the twist-lock 52 at the use position and the lock cover 55 which tries to stand from the closed position to the opening position are switched, resulting in that the twist-lock 52 turns down to the storage position due to its self-weight.

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.

  Further, as a structure that enables the twist lock to move between the use position and the storage position, a tilt type that retreats from the use position to the storage position by falling from the standing state in the vehicle width direction (for example, Patent Document 1 or Patent) Document 2) is known.

JP 11-334458 A Japanese Patent No. 4919924

  In the above conventional structure, when storing the twist lock in the use position, the operator first stands the cover in the closed position in the open position, tilts the twist lock in the use position to the storage position, and then covers the cover in the open position. Return to the closed position. Thus, both the cover and the twist lock must be operated, and the work is complicated.

  In view of the above situation, an object of the present invention is to provide a tightening device that can easily perform a work for storing a twist lock at a use position.

  In order to achieve the above object, a first aspect of the present invention is a tightening device for tightening a container to a support frame on the vehicle body side, the base body, a twist lock, a twist lock operation lever, a lock cover, and a cover operation. And a lever.

  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. 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.

  The twist lock operation lever extends from the twist lock, and the cover operation lever extends from the lock cover.

  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 locking 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 locking rotation shaft portion. The lock cover is freely tiltable between an open position and a closed position in accordance with the operation of the cover operation lever.

  The twist lock body is rotatably supported by the base body around a predetermined tilting rotation axis. The twist lock passes through the opening of the base body around the tilting rotation shaft in accordance with the operation of the twist lock operation lever in a state where the lock cover is set to the open position and the locking portion is set to the disengagement position. And can be tilted between the use position and the storage position.

  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 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 to the use position, the latching portion at the disengagement position enters the engagement hole of the corner fitting of the container loaded on the container chassis from below, and the latching rotation shaft portion is locked. By rotating from the disengaged position to the engaged position.

  The position of the tilt rotation shaft in the twist lock is set to a position where the twist lock standing at the use position is tilted toward the retracted position by the weight of the twist lock.

  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 a container is loaded and fastened on the vehicle body side, the operator operates the twist lock operation lever and tilts the twist lock at the storage position lying down in the storage space upward to stand at the use position. At this time, the lock cover in the closed position is pushed up from below toward the open position by the twist lock that stands up from the retracted position to the use position, and then the vertical position is switched with the twist lock, and the lock cover returns to the closed position by its own weight. . In this state, the container is loaded at a predetermined position on the vehicle body side, and the 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. Then, the operator rotates the locking portion from the engagement release position to the engagement position.

  On the contrary, when the container placed on the vehicle body side is lowered, the operator rotates the locking portion from the engagement position to the engagement release position. In such a state, the container is lifted upward, and the twist lock is removed from the locking hole of the corner fitting of the container. Next, the operator operates the lock cover operating lever to tilt the lock cover at the closed position toward the open position. At this time, the twist lock at the use position tends to fall toward the storage position by its own weight. For this reason, the twist lock at the use position is switched between the vertical position and the lock cover which is about to rise from the closed position toward the open position, and is tilted to the retracted position by its own weight.

  In this way, when the operator raises the twist lock at the storage position and sets it to the use position, it is only necessary to operate the twist lock operation lever. In this case, since only the lock cover operation lever needs to be operated, the work for storing the twist lock at the use position can be easily performed.

  A second aspect of the present invention is the tightening device according to the first aspect, wherein the twist lock operation lever is fixedly supported on the other end side of the locking rotation shaft portion exposed on the base end side of the twist lock body. And extends in a direction crossing the twist rotation axis. In a state where the twist lock is set at the use position, the locking rotation shaft portion rotates with respect to the twist lock main body according to the rotation operation of the twist lock operation lever.

  In the above configuration, the tilting of the twist lock and the rotation of the locking portion are operated by one twist lock operating lever, so that the work and the structure can be simplified.

  A third aspect of the present invention is the tightening device according to the first or second aspect, wherein at least a base body, a twist lock, and a lock cover are provided at both left and right ends of the vehicle body frame in the vehicle width direction. A connection link mechanism is provided. The cover connection link mechanism connects the left and right lock covers, and regulates the left and right lock covers to the same posture by interlocking the tilting of one of the left and right lock covers with the other.

  In the above configuration, by tilting one of the left and right lock covers, the other lock cover is similarly tilted, so that the work for storing the twist lock at the use position can be further simplified.

  A fourth aspect of the present invention is the tightening device according to the first or second aspect, wherein at least a base body, a twist lock, and a lock cover are provided at both left and right ends of the vehicle body frame in the vehicle width direction. A lock coupling link mechanism is provided. The twist lock connecting link mechanism connects the left and right twist locks, and regulates the left and right twist lock bodies to the same posture by linking one tilt of the left and right twist lock bodies with the other.

  In the above configuration, by tilting one of the left and right twist locks, the other twist lock is similarly tilted. Therefore, the work for raising the twist lock at the storage position can be performed more easily.

  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 of one Embodiment of this invention. It is a side view of a semi-trailer, (a) shows the state which loaded the 40ft container, (b) shows the state which loaded the 20ft 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 twist lock operation lever. It is the perspective view which looked at the fastening device from the lower part. 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 which raises the twist lock of a storing position to a use position, (a) is the state in which the twist lock was stored, (b) is the state in the middle of standing of the twist lock, (c) is Each of the states where the twist lock is raised is shown. It is sectional drawing explaining the procedure which tilts the twist lock of a use position to a storage position, (a) is the state which twist lock stood up, (b) is the state in the middle of tilting of a twist lock, (c) is twist Each of the locks stored is shown. It is a figure which shows the twist lock | rock in which the lock pin head was set to the engagement releasing position, (a) is a top view, (b) is a rear view. It is a figure which shows the twist lock in the middle of a lock pin head rotating from an engagement release position to an engagement position, (a) is a top view, (b) is a rear view. It is a figure which shows the twist lock | rock in which the lock pin head was set to the engagement position, (a) is a top view, (b) is a rear view. It is a figure which shows the top view which shows a cover connection link mechanism, (a) is a top view, (b) is a rear view. It is a figure which shows the top view which shows a twist lock connection link mechanism, (a) is a top view, (b) is a rear view. It is a perspective view which shows the cover closing maintenance mechanism which prevents tilting of the lock cover of a closed position, (a) is the unlocked state which has not locked with respect to the lock cover of a closed position, (b) is (a). (C) shows a locked state in which the lock cover is locked to the closed position.

  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 FIG. 2, 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 (large container) 25 set to 40 feet. This is a dual-purpose trailer that can be selectively loaded, and is connected to a tractor (not shown) and pulled.

  Both of these containers 20 and 25 are of a box type, and the rear surfaces of the containers 20 and 25 are closed by doors (not shown) that open and move in a left-right manner to open the inside of the containers. Front corner fittings 21 and 26 and rear corner fittings 22 and 27 are fixed to the front lower corners and rear lower corners of the containers 20 and 25, respectively.

  In the front and rear corner fittings 21 and 22 of the 20 ft container 20, only engagement holes (downward engagement holes 24 formed in the fitting bottom plate 23 of the rear corner fitting 22 are shown in FIG. 3. , The illustration of the engagement hole of the front corner fitting 21 is omitted). The front corner fitting 26 of the 40 ft container 25 is provided with an engagement hole (not shown) that opens forward, and the rear corner fitting 27 is provided with an engagement hole (not shown) that opens downward. ing. A concave tunnel recess portion (not shown) for absorbing a step 16 of the main beam 4 to be described later is provided at substantially the center in the vehicle width direction of the front portion of each bottom portion of the 40 ft container 25. On the other hand, no tunnel recess is provided at the bottom of the 20 ft container 20.

  As shown in FIGS. 1 and 2, the chassis frame 2 of the semi-trailer 1 has a pair of left and right main beams 4 extending substantially parallel along the vehicle longitudinal direction and a plurality of linear shapes that connect the left and right main beams 4 to each other. The cross frame 5 is included. 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. A wheel (tire) 11 is mounted on the rear portion of the main beam 4 via a suspension device 10 and two axles 12, and the chassis frame 2 is supported from below by the wheel 11. 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 beam 4.

  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 part of the front end of the container 25 to a predetermined front-rear position when the container 25 is loaded on the semi-trailer 1.

  A rear bolster 60 extending in the vehicle width direction is fixed to the rear ends of the left and right main beams 4, and the left and right ends of the rear bolster 60 extend from the main beams 4 so as to protrude outward in the vehicle width direction.

  Front and rear intermediate bolsters 50 are respectively fixed to the front and rear two places (two places behind the step 16) of the middle part of the left and right main beams 4. The left and right ends of each intermediate bolster 50 are connected to the main beam 4 from the main beam 4. It protrudes and extends outward in the 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. A large container rear tightening device (hereinafter referred to as a large rear tightening device) 61 is attached to the left and right ends of the rear bolster 60. Small container tightening devices (hereinafter referred to as small-sized tightening devices) 51 are attached to the left and right ends of each of the front and rear intermediate bolsters 50. The small-sized tightening device 51 is a twist lock that can freely move up and down between a use position that protrudes upward from the upper surface of each intermediate bolster 50 and a storage position that is lowered from the use position and accommodated inside each intermediate bolster 50. 52 (shown in FIG. 3). When the 20ft container 20 is loaded, the twist lock 52 is set to the use position, and when the 40ft container 25 is loaded, the twist lock 52 is set to the storage position.

  When the 20ft container 20 is loaded, the front corner fitting 21 of the container 20 is fastened by the front small-sized fastening device 51, and the rear corner fitting 22 is fastened by the rear small-sized fastening device 51. The distance between the front and rear small fastening devices 51 is set in accordance with the distance between the front corner fitting 21 and the rear corner fitting 22 of the 20 ft container 20.

  When the 40 ft container 25 is loaded (when 40 ft is loaded), 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 61. The distance between the large front side fastening device 41 and the large rear side fastening device 61 is set in accordance with the distance between the front corner fitting 26 and the rear corner fitting 27 of the 40 ft container 25.

  Next, the compact tightening device 51 will be described with reference to FIGS. Since the front and rear and right and left small-sized tightening devices 51 have the same configuration, only one of them (right rear side) will be described below, and the other description will be omitted.

  As shown in FIGS. 3 to 14, the compact tightening device 51 includes a base body 53, a twist lock 52, a twist lock operation lever 54, a lock cover 55, a cover operation lever 141, and a twist lock rotation restriction mechanism 170.

  The base body 53 has an upper plate portion 101, a pair of front and rear vertical plate portions 102, and an outer end plate portion 105, and extends integrally from the outer end in the vehicle width direction of the intermediate bolster 50 to the outer side in the vehicle width direction. . The front and rear vertical plate portions 102 extend downward from the lower surface of the upper plate portion 101, and the outer end plate portion 105 closes the outer end of the base body 53 in the vehicle width direction.

  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 forms the container mounting surface 107 on which the containers 20 and 25 are mounted together with the upper surface 50a of the upper rear bolster 50. .

  A storage space 108 defined by the lower surface of the upper plate portion 101 and the inner surfaces of the front and rear vertical plate portions 102 is provided below the upper plate portion 101, and the storage space 108 is opened upward in the upper plate portion 101. A rectangular opening 109 is formed.

  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 is formed on the distal end 111 a side and the proximal end 111 b side of the twist lock body 111. 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.

  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 collar 116 that restricts the sliding movement of the locking rotation shaft portion 112 along the twist rotation shaft 114 is provided on the outer periphery of the locking rotation shaft portion 112 exposed on the base end 111b side of the twist lock body 111 on the other end 112b side. It is fixed.

  The lock pin head 113 has a rectangular parallelepiped shape that tapers in a direction away from the locking rotation shaft portion 112, and rotates integrally with the locking rotation shaft portion 112. The outer periphery of the end surface of the lock pin head 113 fixed to the locking rotation shaft portion 112 is formed in substantially the same shape as the outer shape of the twist lock body 111 on the tip 111a side. The lock pin 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 locking rotation shaft portion 112. In the disengagement position, the longitudinal direction of the lock pin head 113 substantially coincides with the longitudinal direction of the twist lock body 111 (vehicle longitudinal direction) (see FIG. 3), and in the engagement 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. 14). The rotation range of the locking rotation shaft portion 112 is such that the rotation restricting portion 117 that integrally protrudes from the collar 116 contacts the side surface of the twist lock body 111 (in this embodiment, the side surface on the outer side in the vehicle width direction). It is regulated between the engagement release position and the engagement position.

  The twist lock operation lever 54 extends in a direction crossing the twist rotation shaft 114 from the locking rotation shaft portion 112. The twist lock operation lever 54 of this embodiment includes a fixed lever 120 and a movable lever 121. The fixed lever 120 extends from the collar 116 in a direction substantially orthogonal to the twist rotation shaft 114. A cylindrical portion 120 a extending in a direction substantially orthogonal to the fixed side lever 120 is fixed to the tip of the fixed side lever 120. The movable lever 121 is inserted into the inner diameter portion of the cylindrical portion 120 and is supported by the cylindrical portion 120a so as to be slidable. As the movable lever 121 slides relative to the cylindrical portion 120a, the twist lock operation lever 54 expands and contracts. The twist lock operation lever 54 is shortened when not operated and extended when operated.

  The lock cover 55 has a rectangular flat plate-like cover body 131 and a pair of plate-like support portions 132 that integrally protrude from the back surface of the cover body 131, and each support portion 132 includes: A support hole 133 penetrating on the same axis is formed.

  Insertion holes 134 that pass coaxially are formed in the longitudinal plate portions 102 before and after the base body 53, and the cover support shaft portion 135 passes through the support holes 133 and the insertion holes 134. It 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 body 131 in the open position moves to the closed position when it falls down outward in the vehicle width direction, and the cover body 131 in the closed position protrudes from the opposed inner surfaces of the front and rear vertical plate portions 102. It is placed almost horizontally on the top.

  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. By screwing the nut 140 into the front end portion of the cover support shaft portion 135 protruding from the front vertical plate portion 102, movement of the cover support shaft portion 135 in the axial direction (vehicle longitudinal direction) is prevented. 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 142 is formed in the cover shaft support portion 135. 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 142, and the lock cover 55 rotates integrally with the cover support shaft 135.

  The cover operating lever 141 extends from the rear end of the cover support shaft portion 135 substantially perpendicularly to the rear of the rear outer vertical plate portion 102 so as to be bent. The cover operation lever 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 lever 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 longitudinal direction) via the shaft insertion hole 115 is formed in a circular shape centering on the tilting rotation shaft 151. Bolt insertion holes 153 that can communicate linearly with the twist lock support holes 152 are formed in the front and rear vertical plate portions 102, and are formed on the front surface of the front vertical plate portion 102 and the rear surface of the rear vertical plate portion 102. The nuts 154 are fixed to the bolt insertion holes 153, respectively. 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 the rear, so that the tip side shaft portion of each bolt 155 enters the twist lock support hole 152 and the twist lock 52 Is supported rotatably by the inner vertical plate portions 102 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 in the retracted position is placed on a twist lock placing portion 156 that connects the opposing inner surfaces of the front and rear vertical plate portions 102, and falls down substantially horizontally in the storage space 108.

  The position of the tilt rotation shaft 151 in the twist lock 52 is set to a position in which the twist lock 52 erected at the use position is tilted toward the storage position by the weight of the twist lock 52. In this embodiment, the front end (outer end in the vehicle width direction) of the lock cover 55 in the closed position is supported from below on the inner side in the vehicle width direction of the twist lock main body 111 in the use position (the tilt direction side from the use position to the storage position). The cover support portion 122 is integrally projected, and the cover support portion 122 is formed, and the tilting rotation shaft 151 is disposed on the outer side in the vehicle width direction with respect to the twist rotation shaft 114. No. 52 is set such that the inner side in the vehicle width direction (tilting direction side) is heavier than the outer side in the vehicle width direction (counter tilting direction side) with respect to the vertical plane passing through the tilt rotation shaft 151 at the use position.

  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 cover support portion 122 projecting from the inner side surface in the vehicle width direction.

  The lock pin head 113 at the disengagement position when the twist lock 52 is set to 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 performs a twist lock operation. The locking rotation shaft 112 rotates in the locking direction (in the direction of the arrow 160 shown in FIG. 13) according to the rotation operation of the lever 54, thereby rotating from the disengagement position to the engagement position. Engage.

  The twist lock rotation restriction mechanism 170 includes a rotation restriction portion 171, a rotation restriction plate 172, and a rotation restriction operation lever 173. The rotation restricting portion 171 protrudes from the outer periphery of the collar 116. One end of the rotation restricting operation lever 173 is rotatably supported by the vertical plate portion 102 by being inserted from the front into the lever insertion hole 174 of the front vertical plate portion 102, and the other end portion of the rotation restricting operation lever 173. Extends outward in the vehicle width direction. The rotation restricting plate 172 has a first contact end 172a and a second contact end 172b, and is fixed to one end of the rotation restricting operation lever 173. The first contact end 172a and the second contact end 172b of the rotation restricting plate 172 are positioned within the rotation range of the rotation restricting portion 171 in a normal state, and rotate when the other end side of the rotation restricting operation lever 173 is lifted. It tilts upward from the rotation range of the restricting portion 171 (see FIG. 13B). When the twist lock 52 is set to the use position and the lock pin head 113 at the disengagement position is to be rotated to the engagement position, the rotation restricting portion 171 contacts the first contact portion 172a of the rotation restricting plate 172 in the normal state. In contact therewith, the rotation of the lock pin head 113 is restricted (see FIG. 12A), and the lock pin head 113 is held in the disengaged position. When the lock pin head 113 at the engagement position is rotated to the engagement release position, the rotation restricting portion 171 comes into contact with the second contact portion 172b of the rotation restricting plate 172 in the normal state, and the lock pin head 113 is rotated. The lock pin head 113 is held in the engaged position by being regulated (see FIG. 14A). When the lock pin head 113 at the engagement release position is rotated to the engagement position, and when the lock pin head 113 at the engagement position is rotated to the engagement release position, the rotation restricting operation lever 173 is lifted and locked in this state. The pin head 113 may be rotated.

  According to the present embodiment, when the 20ft container 20 is loaded and fastened, as shown in FIG. 10, the operator operates the twist lock operation lever 54 (pushes inward in the vehicle width direction) and falls down. The twist lock 52 is tilted upward to stand at the use position. At this time, the lock cover 55 in the closed position is pushed up from below toward the open position by the twist lock 52 erected from the retracted position to the use position (see FIG. 10B), and then between the twist lock 52 and the lock cover 55. The vertical position is switched, and the weight returns to the closed position by its own weight. In this state, the 20 ft container 20 is loaded, and the twist lock 52 is inserted into the locking hole 23 of the corner bracket 22 from below. As a result, the 20 ft container 20 (corner bracket 22) is placed on the container placement surface 107. Then, the operator lifts the rotation regulating operation lever 173 and rotates the twist lock operation lever 54 (see FIG. 13), and rotates the lock pin head 113 from the engagement release position to the engagement position.

  Further, when the loaded 20 ft container 20 is lowered, the operator lifts the rotation restricting operation lever 173 and rotates the twist lock operation lever 54 to rotate the lock pin head 113 from the engagement position to the engagement release position. In this state, the 20 ft container 20 is lifted upward to remove the twist lock 52 from the locking hole 23 of the corner bracket 22. Next, as shown in FIG. 11, the operator operates (presses down) the lock cover operating lever 141 to tilt the lock cover 55 at the closed position toward the open position. At this time, the twist lock 52 at the use position tends to fall toward the storage position by its own weight. For this reason, the twist lock 52 in the use position is switched between the up and down positions with the lock cover 55 that is about to rise from the closed position toward the open position, and tilts to the retracted position by its own weight.

  As described above, when the operator raises the twist lock 52 at the storage position and sets the twist lock 52 to the use position, the operator only has to operate the twist lock operation lever 54. When the position is set, only the lock cover operation lever 141 needs to be operated, so that the work for storing the twist lock 52 at the use position can be easily performed.

  Further, the operator can operate the tilting of the twist lock 52 and the rotation of the lock pin head 113 with one twist lock operating lever 54, so that the work and the structure can be simplified.

  Next, Modifications 1 to 3 of this embodiment will be described with reference to FIGS. 15 to 17. Note that the description of the same configuration as the above embodiment is omitted.

  In Modification 1, as shown in FIG. 15, the lock covers 55 of the compact tightening devices 51 provided on the left and right sides of one intermediate bolster 50 are connected by a cover connecting link mechanism 180.

  The cover connection link mechanism 180 is fixed to the left and right cover support shafts 135 and rotated with the left and right connection brackets 181 and the outer end in the vehicle width direction rotatably connected to the connection bracket 181. It has left and right cover connecting links 182 extending inward in the vehicle width direction, and a connecting rotating plate 183 that is rotatably supported by the intermediate bolster 50. Inner ends in the vehicle width direction of the left and right cover connection links 182 are rotatably connected to the rotation connection plate 183.

  When one (for example, the left) cover operation lever 141 is operated to raise the left lock cover 55 from the closed position to the open position, the left connecting bracket 181 moves outward in the vehicle width direction, and the left cover connecting link 182 is moved. Moves outward in the vehicle width direction, and the connecting rotating plate 183 rotates in accordance with the movement of the left cover connecting link 182. When the connecting rotary plate 183 rotates, the right cover connecting link 182 moves outward in the vehicle width direction, the right connecting bracket 181 moves outward in the vehicle width direction, and the right lock cover 55 rises from the closed position to the open position. To do. In this way, the cover coupling mechanism 180 regulates the left and right lock covers 55 to the same posture by interlocking the tilting of one of the left and right lock covers 55 with the other.

  According to the first modification, by tilting one of the left and right lock covers 55, the other lock cover 55 is similarly tilted, so that the work for storing the twist lock at the use position can be performed more easily. it can.

  In the second modification, as shown in FIG. 16, the twist locks 52 of the small-sized tightening devices 51 provided on the left and right sides of one intermediate bolster 50 are connected by a twist lock connecting link mechanism 187.

  In this modification, instead of the front and rear bolts 155 (see FIG. 4), the tilt rotation shaft 151 is configured by a single twist lock support shaft portion 185 that rotates according to the tilt of the twist lock body 111. Further, instead of the twist lock operation lever 54 (see FIG. 3) capable of operating the tilt of the twist lock 52 and the rotation of the lock pin head 113, a twist lock tilt operation lever 186 capable of operating the tilt of the twist lock 52, and a lock A twist lock rotation operation lever (not shown) capable of operating the rotation of the pin head 113 is provided. The twist lock tilt operation lever 186 extends from the twist lock support shaft portion 185. The twist lock connection link mechanism 187 is fixed to the left and right twist lock support shaft portions 185 and rotated with the left and right connection brackets 185, and is connected to the connection bracket 188 in a vehicle width direction outside. Left and right twist lock connection links 189 extending inward in the vehicle width direction from the end portions, and a connection rotating plate 190 rotatably supported by the intermediate bolster 50 are provided. The inner ends in the vehicle width direction of the left and right twist lock connection links 188 are rotatably connected to the rotation connection plate 190.

  When one (for example, left) twist lock tilting operation lever 186 is operated to raise the left twist lock 52 from the retracted position to the upright position, the left connecting bracket 188 moves inward in the vehicle width direction, and the left twist lock The connection link 189 moves inward in the vehicle width direction, and the connection rotation plate 190 rotates according to the movement of the left twist lock connection link 189. When the connecting rotating plate 190 rotates, the right twist lock connecting link 189 moves inward in the vehicle width direction, the right connecting bracket 188 moves inward in the vehicle width direction, and the right twist lock 52 moves from the retracted position to the use position. Stand up. Thus, the twist lock connecting link mechanism 187 regulates the left and right twist locks 52 in the same posture by interlocking the tilt of one of the left and right twist locks 52 with the other.

  According to the second modification, since the other twist lock 52 is similarly tilted by tilting one of the left and right twist locks 52, the work for raising the twist lock 52 at the storage position can be performed more easily. Can do.

  As shown in FIG. 17, Modification 3 is provided with a cover closing maintaining mechanism 191 that prevents the lock cover 55 from being tilted at the closing position.

  The cover closing maintaining mechanism 191 includes a first restriction plate 192 that is fixed to the cover support shaft portion 135 and extends downward, and a second restriction plate 193 that is rotatably supported by the rear vertical plate portion 102. The first restricting plate 192 is formed with an elongated hole-shaped slide engaging portion 194, and the second restricting plate 193 is provided with a locking projection 195 that can slide the slide engaging portion 194. In the unlocked state in which the locking projection 195 is positioned above the lower end of the slide engagement portion 194 in the state where the lock cover 55 is set to the closed position (see FIG. 17A), the locking projection 195 And the slide engaging portion 194 are allowed to move relative to each other, and the lock cover 55 is raised to the open position by depressing the cover operating lever 141 (see FIG. 17B). On the other hand, in a state where the lock cover 55 is set to the closed position, when the locking protrusion 195 is positioned near the lower end of the slide engaging portion 194 by pushing down the second restricting plate 192 from the unlocked state, The locked state where the slide engaging portion 194 engages is established, and the relative movement between the locking projection 195 and the slide engaging portion 194 is restricted (see FIG. 17C).

  According to the third modification example, when the container is not loaded with the twist lock 52 set in the retracted position and the lock cover 55 set in the closed position, the cover closed maintaining mechanism 191 is set in the locked state. Fluctuation of the lock cover 55 due to vibration during traveling can be prevented, and generation of noise caused by this can be suppressed.

  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 20ft containers 20 and 45ft containers, or a dual-purpose type capable of selectively stacking 20ft containers 20, 40ft containers 25 and 45ft containers. Further, it may be of an expansion / contraction type in which the chassis frame is divided and connected in the front and rear direction.

  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 4: Main beam 5: Cross frame 10: Suspension device 11: Wheel (tire)
15: Kingpin 16: Step (gooseneck)
20: 20ft container (small container)
25: 40ft container (large container)
40: Front bolster 41: Front side tightening device for large containers (Large front side tightening device)
50: Intermediate bolster 50a: Upper surface of intermediate bolster 51: Tightening device for small containers (tightening device for small size)
52: Twist lock 53: Base body 54: Twist lock operation lever 55: Lock cover 60: Rear bolster 61: Rear tightening device for large containers (large rear tightening device)
101: Upper plate portion 101a: Upper surface of upper plate portion 102: Vertical plate portion 107: Container placement surface 111: Twist lock body 112: Locking rotation shaft portion (lock pin)
113: Lock pin head (locking portion)
114: Twist rotation shaft 115: Shaft insertion hole 109: Opening part 131: Cover body 132: Support part 135: Cover support shaft part 141: Cover operation lever 151: Tilt rotation shaft 152: Twist lock support hole 153: Bolt insertion hole 154 : Nut 155: Bolt 160: Locking direction 180: Cover connecting link mechanism 187: Twist lock connecting link mechanism 191: Cover closed maintaining mechanism

Claims (4)

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 passes from a base end side to a front end side along a predetermined twist rotation axis, and the twist lock main body that is rotatably supported around the twist rotation axis. A twist lock having a lock rotation shaft portion that is inserted through the shaft insertion hole, and a lock portion that is fixed to one end of the lock rotation shaft portion and is exposed at a tip end side of the twist lock body;
A twist lock operating lever extending from the twist lock;
A lock cover 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;
A cover operation lever extending from the lock cover,
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 lock cover is tiltable between the open position and the closed position according to the operation of the cover operating lever,
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 in accordance with the operation of the twist lock operation lever,
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 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 locking direction, the rotation shaft portion rotates from the engagement release position to the engagement position,
The container tightening device is characterized in that the position of the tilt rotation shaft in the twist lock is set to a position where the twist lock erected at the use position is tilted toward the storage position by the weight of the twist lock. . The tightening device according to claim 1,
The twist lock operation lever is fixedly supported on the other end side of the locking rotation shaft portion exposed on the base end side of the twist lock body and extends in a direction crossing the twist rotation shaft.
The container tightening device, wherein the locking rotation shaft portion rotates relative to the twist lock body in response to a rotation operation of the twist lock operation lever in a state where the twist lock is set at the use position. . The tightening device according to claim 1 or 2, wherein at least the base body, the twist lock, and the lock cover are respectively provided at both left and right ends of the vehicle body frame in the vehicle width direction.
A container tightening mechanism comprising: a cover connecting link mechanism that connects the left and right lock covers, and regulates the left and right lock covers in the same posture by interlocking one tilt of the left and right lock covers with the other. apparatus. The tightening device according to claim 1 or 2, wherein at least the base body, the twist lock, and the lock cover are respectively provided at both left and right ends of the vehicle body frame in the vehicle width direction.
A twist lock connecting link mechanism is provided that connects the left and right twist locks and regulates the left and right twist lock bodies to the same posture by interlocking one tilt of the left and right twist lock bodies with the other. Container tightening device.

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