JP2007118928A - Container trailer - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a container trailer capable of mounting containers of different lengths, and enhancing the cargo handling efficiency and the occupancy efficiency on the roads when mounting containers of short length thereon. <P>SOLUTION: A sub frame 22 with a 20-ft type container 28 being mounted thereon while an expandable frame 24 is accommodated in a rear end of a main frame 16 slides between the advanced end position (a) abutted on a step of a gooseneck 12a of a main rail 12 and the retracted position (b) when accommodating the expandable frame 24. The expandable frame 24 is expanded/contracted between the projecting limit position (c) and the accommodation position interlockingly with the slide operation of the sub frame 22 while the container is not mounted on the sub frame 22 yet. The expandable frame 24 is protruded to the projecting limit position, and a 40-ft type container 30 is mounted (d) across the main frame 16 and the sub frame 24. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a container trailer capable of mounting containers having different lengths.

  Conventionally, it is possible to mount both a 20-foot container (a 20-foot container) and a 40-foot container (a 40-foot container) based on an international container standard defined by ISO. A foot type container trailer is used (for example, see Patent Document 1).

Japanese Patent Laid-Open No. 10-182057 ([0003], FIG. 8)

Now, when traveling with a 20-foot container mounted on a 40-foot container trailer, it is necessary to fix the 20-foot container at the front position of the trailer in order to comply with domestic regulations. However, when the 20-foot container is fixed at the front position of the trailer, the main frame of the trailer extends further to the rear of the container. Therefore, the cargo handling operation from the rear of the container with the container mounted on the trailer is extremely difficult. There is a problem that it becomes difficult.
In addition, when a 20-foot container is mounted on a 40-foot container trailer, it is clear in terms of the occupation efficiency of the road and parking space, compared to the case where a 20-foot container is mounted on a 20-foot container dedicated trailer. It will be disadvantageous.

  The present invention has been made in view of the above problems, and the object of the present invention is to enable containers with different lengths to be mounted in a container trailer, and when a container with a short length is mounted. The purpose is to improve handling efficiency and occupation efficiency on the road.

  In order to solve the above problems, a container trailer according to claim 1 of the present invention includes a main frame in which a pair of left and right main rails in which a gooseneck is formed are fixed by a plurality of horizontal beams, and a bolster is supported at a front end. The main rail has a sub-frame that is slidable in the front-rear direction on the upper back surface of the gooseneck, and a bolster at the front-rear end, and is stored in the rear end of the main frame. A telescopic frame capable of projecting to the projecting limit position or returning to the retracted position, and a container fixing latch is provided at the bolster at the front end of the main rail, and a container is provided at the bolster at each of the front and rear ends of the subframe. A fixing twist lock is provided, and the container fixing twist lock at the front end of the subframe is And it is characterized in that it is configured to be freely.

According to the present invention, when the telescopic frame is in the retracted position, the sub-frame provided on the upper back surface of the gooseneck of the main rail constituting the main frame is slid rearward, so that a container having a relatively short overall length can be obtained. It can be moved to the rear end of the main frame while being placed on the subframe. Similarly, by sliding the subframe forward, it is possible to move the container having a relatively short overall length to the advance limit position on the mainframe in a state where the container is placed on the subframe. Naturally, the same movement is possible even when no container is mounted on the subframe.
The subframe has bolsters at the front and rear end portions, and the container fixing twist locks are provided at the bolsters at the front and rear end portions of the subframe. Therefore, the container fixing twist lock has a relatively short overall length. The container is securely fixed on the subframe.

In addition, the telescopic frame stored in the rear end of the main frame can project to the rearward limit position in conjunction with the sliding motion of the subframe or return to the storage position. By moving the sub-frame and sliding the sub-frame backward, the sub-frame slides backward until the telescopic frame protrudes to the rearward projecting limit position while pushing the telescopic frame backward. Furthermore, by sliding the telescopic frame forward, the telescopic frame follows the subframe and returns to the storage position. Therefore, since the expansion / contraction operation of the expansion / contraction frame is brought about by the sliding of the subframe, the driving device related to the expansion / contraction frame becomes unnecessary.
Moreover, the bolsters at the front end of the main rail and the bolsters located at the front and rear ends of the subframe are compatible in height-related dimensions for container fixation, so the twist lock for container fixation at the front end of the subframe is Because the telescopic frame is interlocked with the sliding motion of the subframe, the container lock twist lock at the front end of the subframe is inserted into the bolster because it is configured to be able to move in and out. Thus, the container fixing twist locks provided at the bolster at the front end of the main frame and the bolster at the rear end of the sub frame securely fix the container having a relatively long length across the main frame and the sub frame. The Rukoto.

  Further, in the present invention, the main frame includes the position of the forward end of the sub frame, the retracted position when the telescopic frame is stored, and the retracted end position when the telescopic frame projects to the projecting limit position. A sub-frame locking pin for fixing the position of the sub-frame, a driving means for the sub-frame, and an expansion / contraction frame locking pin for fixing the position of the expansion / contraction frame at a retracted position and a protruding limit position of the expansion / contraction frame. The telescopic frame includes a pair of left and right rails housed in a space sandwiched between the pair of main rails, and a bolster at the rear end of the subframe that protrudes upward from the rear end of the rail. A subframe stopper that contacts the rear surface, a support that supports the rear end of the subframe from below, And the sub-frame locking pin for fixing the location, a hook selectively engages to bolster the front of the sub-frame rear part, it is desirable that the infested mechanism of the hook is provided.

According to the present invention, when the telescopic frame is in the retracted position, the sub-frame provided on the back upper surface of the gooseneck of the main rail constituting the main frame is moved backward by the driving means of the sub-frame provided on the main frame. The subframe can be moved to the rear end portion of the main frame in a state where a container having a relatively short overall length is placed on the subframe. The rear surface of the bolster at the rear end of the subframe is brought into contact with the subframe stopper protruding upward from the rear end of the pair of left and right rails housed in the space between the pair of main rails of the telescopic frame. The sub frame stops at the retracted position when the telescopic frame is stored.
Similarly, the subframe is slid forward by the driving means of the subframe, so that the subframe is moved to the advance limit position on the main frame in a state where a relatively short container is placed on the subframe. And can be moved. Naturally, the same movement is possible even when no container is mounted on the subframe.

The subframe is moved to the rear end of the main frame, the telescopic frame lock pin is unlocked, and the subframe is further slid rearward by the subframe driving means. At this time, the bolster rear surface of the rear end of the subframe is in contact with the subframe stopper protruding upward from the rear end of the rail of the telescopic frame, and the rear end of the subframe is supported from below by the support of the telescopic frame. Therefore, the sub-frame pushes the telescopic frame backward, and slides until the telescopic frame projects to the rearward projecting limit position. And the position of an expansion-contraction frame can be fixed with an expansion-contraction frame lock pin in the state which the expansion-contraction frame protruded to the protrusion limit position of back.
The rear end of the sub-frame is always supported from below by the support of the telescopic frame while the telescopic frame is interlocked with the sliding motion of the sub-frame and protrudes to the rearward limit position or returns to the retracted position. The posture is stable.

In addition, the telescopic frame is provided with a hook that selectively engages the front surface of the bolster at the rear end of the sub-frame and a hook in / out mechanism, so that the sub-frame moves to the projecting limit position of the telescopic frame. The subframe is slid forward by the subframe driving means while it is in the retracted end position at the time of the protrusion, so that the telescopic frame is pulled forward by the hook engaged with the subframe and follows the subframe. The telescopic frame returns to the storage position.
Then, when the telescopic frame is returned to the retracted position, the sub frame can be further slid forward by the sub frame driving means by immersing the hook into the telescopic frame and releasing the connection of the sub frame to the telescopic frame. It becomes possible.
Therefore, the expansion / contraction operation of the expansion / contraction frame can be performed using the sub-frame driving means as a power source. Further, it is possible to perform a series of operations required for the expansion / contraction operation of the expansion / contraction frame together with the operations required for sliding the subframe. In addition, when a container with a relatively short overall length is mounted, the telescopic frame is stored at the rear end of the main frame while allowing a container with a relatively long overall length to be mounted, thereby reducing the overall length of the container trailer. It will be.

  In addition, the subframe is moved by the subframe lock pin at each of the forward end position, the retracted position when the telescopic frame is retracted, and the retracted end position when the telescopic frame projects to the projecting limit position. The position of the subframe with respect to the frame or the stretchable frame is fixed. Therefore, the position of the subframe with respect to the main frame is securely fixed except when the subframe is slid.

Also, in the present invention, the telescopic frame lock pin and the hook retracting mechanism are interlocked so that the telescopic frame is in the retracted position and the hook is retracted when the telescopic frame lock pin is locked. It is desirable to have a structure that
According to this configuration, in conjunction with the locking and unlocking operation of the expansion / contraction frame lock pin, which is indispensable for the expansion / contraction operation of the expansion / contraction frame, the hook is protruded or stored, the subframe is connected to the expansion / contraction frame, and its release The workability of the expansion / contraction operation of the expansion / contraction frame is improved.

In the present invention, the sub-frame is provided with a roller for allowing it to move up and down up and down on the upper surface behind the gooseneck of the main rail, and the support of the telescopic frame is located at the retracted position of the telescopic frame. It is desirable to have a shape that partially overlaps the upper surface of the main rail and can support the roller together with the main rail from below.
According to the present invention, the roller for running on the upper back surface of the gooseneck of the main rail is provided in the subframe so as to be able to protrude and retract up and down. The subframe can be smoothly slid by protruding downward from the frame and floating the subframe from the upper back surface of the gooseneck of the main rail. On the other hand, when it is necessary to fix the position of the subframe, the subframe is fixed to the main rail by closely fitting the subframe to the upper back surface of the gooseneck of the main rail by storing the roller in the subframe.
The support of the telescopic frame has a shape that partially overlaps the upper surface of the main rail at the retracted position of the telescopic frame and can support the roller from below with the main rail. Transfer between the rail upper surface and the support of the telescopic frame is also performed smoothly.

The present invention further includes a traveling wheel, an air brake for the traveling wheel, and an air circuit for air brake. The air circuit for air brake is provided with a parking brake at the forward end position of the subframe. It is desirable to provide a valve that opens.
According to the present invention, a state in which the subframe is moved to the forward end position, that is, a container having a relatively short overall length is mounted on the subframe, and the container can run on a trailer determined by law. When in position, the parking brake is automatically released, allowing the container trailer to travel.

  The container trailer according to claim 1 of the present invention, wherein the main frame includes an extension / contraction mechanism that fixes the position of the extension / contraction frame at the storage position and the protruding limit position of the extension / contraction frame. A frame lock pin is provided, and the telescopic frame includes a pair of left and right rails housed in a space sandwiched between the pair of main rails and a rear end of the subframe protruding upward from a rear end portion of the rails. A subframe stopper that contacts the rear surface of the bolster, a subframe lock pin that fixes the position of the subframe, a hook that selectively engages the bolster front surface of the rear end portion of the subframe, and a mechanism for extending and retracting the hook The subframe is provided with a forward end position relative to the main frame, and when the telescopic frame is stored. Retracted position, and, it is desirable that the sub-frame locking pin fixed to each of the retracted end position when the protrusion of the protruding limit position of the telescopic frame is provided.

According to the present invention, when the telescopic frame is in the retracted position, the sub-frame provided on the back upper surface of the gooseneck of the main rail constituting the main frame is moved backward by the driving means of the sub-frame provided on the main frame. The subframe can be moved to the rear end portion of the main frame in a state where a container having a relatively short overall length is placed on the subframe. The rear surface of the bolster at the rear end of the subframe is brought into contact with the subframe stopper protruding upward from the rear end of the pair of left and right rails housed in the space between the pair of main rails of the telescopic frame. The sub frame stops at the retracted position when the telescopic frame is stored.
Similarly, the subframe is slid forward by the driving means of the subframe, so that the subframe is moved to the advance limit position on the main frame in a state where a relatively short container is placed on the subframe. And can be moved. Naturally, the same movement is possible even when no container is mounted on the subframe.

  The subframe is moved to the rear end of the main frame, the telescopic frame lock pin is unlocked, and the subframe is further slid rearward by the subframe driving means. At this time, the rear surface of the bolster at the rear end of the subframe abuts the subframe stopper protruding upward from the rear end of the rail of the telescopic frame, so that the subframe pushes the telescopic frame backward, and the telescopic frame Slide until protruding to the protruding limit position. And the position of an expansion-contraction frame can be fixed with an expansion-contraction frame lock pin in the state which the expansion-contraction frame protruded to the protrusion limit position of back.

In addition, the telescopic frame is provided with a hook that selectively engages the front surface of the bolster at the rear end of the sub-frame and a hook in / out mechanism, so that the sub-frame moves to the projecting limit position of the telescopic frame. The subframe is slid forward by the subframe driving means while it is in the retracted end position at the time of the protrusion, so that the telescopic frame is pulled forward by the hook engaged with the subframe and follows the subframe. The telescopic frame returns to the storage position.
Then, when the telescopic frame is returned to the retracted position, the sub frame can be further slid forward by the sub frame driving means by immersing the hook into the telescopic frame and releasing the connection of the sub frame to the telescopic frame. It becomes possible.
Therefore, the expansion / contraction operation of the expansion / contraction frame can be performed using the sub-frame driving means as a power source. Further, it is possible to perform a series of operations required for the expansion / contraction operation of the expansion / contraction frame together with the operations required for sliding the subframe. In addition, when a container with a relatively short overall length is mounted, the telescopic frame is stored at the rear end of the main frame while allowing a container with a relatively long overall length to be mounted, thereby reducing the overall length of the container trailer. It will be.

In the present invention, it is preferable that the sub-frame is provided with a slide plate that is in sliding contact with the upper back surface of the gooseneck of the main rail.
According to the present invention, since the sub frame is provided with the slide plate that is in sliding contact with the upper back surface of the gooseneck of the main rail, the sub frame can be smoothly slid with respect to the upper back surface of the gooseneck of the main rail. Become.

Further, in the present invention, the slide plate uses a member having a relatively high permissible surface pressure in a portion where the surface pressure during sliding is increased due to the deflection of the main frame, and in other portions. It is desirable to use a member having a relatively low permissible surface pressure.
According to the present invention, the slide plate uses a member having a relatively high permissible surface pressure in a portion where the surface pressure during sliding is increased due to the deflection of the main frame. In addition, since a member having a relatively low permissible surface pressure is used, the required sliding performance can be obtained while suppressing the use of the high-cost high permissible surface pressure member within a certain range.

Moreover, in the present invention, the main frame pushes the sub frame in contact with the bolster at the front end portion of the sub frame at the forward end position of the sub frame and the retracted position when retracting the telescopic frame. It is desirable that auxiliary drive means for assisting activation of the subframe is provided.
In the present invention, the subframe is always in sliding contact with the upper back surface of the gooseneck of the main rail via the slide plate. Therefore, when the subframe is started from a stopped state, the gooseneck of the slide plate and the main rail is used. A relatively large static friction force acts between the rear upper surface. In particular, when the subframe is activated backward from the forward end position and when activated from the retracted position when retracting the telescopic frame, a container having a relatively short overall length is placed on the subframe. In this state, since the subframe may be activated, the static friction force acting between the slide plate and the upper back surface of the gooseneck of the main rail at the time of activation is greater. Therefore, the auxiliary drive means comes into contact with the bolster at the front end of the subframe, pushes out the subframe, and assists the subframe drive means, so that the subframe can be activated smoothly.

In the present invention, the retractable frame is connected to the auxiliary drive means for assisting the start of the subframe in the retracted position of the subframe when the telescopic frame is retracted. A release means is provided for releasing the engagement with the sub-frame when protruding to the protruding limit position or returning to the retracted position.
In the present invention, when the telescopic frame projects to the rearward projecting limit position in conjunction with the sliding motion of the subframe or returns to the retracted position, the subframe exceeds the retracted position when retracting the telescopic frame, Furthermore, it is necessary to move to a rear position. At this time, the auxiliary drive means that abuts against the rear surface of the bolster at the rear end portion of the subframe and pushes out the subframe becomes a protrusion that inhibits the movement of the subframe. Therefore, when the telescopic frame projects to the rearward projecting limit position or returns to the retracted position in conjunction with the sliding motion of the subframe by the releasing means, the engagement between the auxiliary driving means and the subframe is released. Thus, the sub-frame can be moved when the telescopic frame is expanded and contracted.

Further, in the present invention, the release means releases the engagement between the auxiliary drive means and the subframe in conjunction with the immersion operation of the container lock twist lock at the front end of the subframe. It is desirable that an interlocking mechanism is provided.
In the present invention, it is necessary to cause the telescopic frame to project to the rearward projecting limit position in conjunction with the sliding motion of the subframe. A relatively long container is placed across the main frame and the subframe. In this case, the container fixing twist lock at the front end of the subframe is not necessary, and it is necessary to store it in the immersion position. Also, the container fixing twist locks at the front end of the subframe are exposed on both sides of the vehicle body, so that the operator can relatively easily move in and out. Therefore, the interlocking mechanism performs an operation of releasing the engagement between the auxiliary driving means and the subframe by the releasing means in conjunction with the immersion operation of the container fixing twist lock at the front end portion of the subframe. The disengagement operation with the subframe is facilitated.

In the present invention, the sub-frame lock pins provided on the sub-frame are provided at least at four positions on the front, rear, left and right of the sub-frame, all of which are linked so as to be interlocked with one operation lever. It is desirable.
According to the present invention, the subframe lock pins provided at least at the four positions on the front, rear, left and right of the subframe can be operated simultaneously by operating one operation lever, and the subframe position fixing and position fixing releasing operation with respect to the main frame can be performed. Becomes easy.

Further, in the present invention, a traveling wheel, an air brake for the traveling wheel, and an air circuit for air brake are provided, and the air circuit for air brake includes a twist lock for fixing the container at the front end of the subframe. It is desirable that a valve for releasing the parking brake is provided at the position where the twist lock is retracted.
According to the present invention, when the container fixing twist lock at the front end of the subframe is in the immersive position, that is, the telescopic frame protrudes to the rearward limit position and the subframe is positioned at the retracted end position. In order to mount a container having a long target length across the main frame and the sub frame, the parking brake is automatically released in a state where the twist lock is immersed, and the container trailer can run.

  Since the present invention is configured as described above, it is possible to mount containers having different lengths in the container trailer, and to improve handling efficiency and occupation efficiency when a container having a short length is mounted. It becomes possible.

The best mode for carrying out the present invention will be described below with reference to the accompanying drawings. In this description, the front means the forward direction of the container trailer, the rear means the backward direction, and the left-right direction means the vehicle width direction.
First, a first embodiment of the present invention will be described with reference to FIGS. As shown in FIG. 1, the container trailer 10 according to the first embodiment of the present invention is configured such that a bolster 14 is supported on the front end portions of a pair of left and right main rails 12 on which goose necks 12a are formed. A main frame 16 is provided. Further, a sub frame 22 is slidably arranged back and forth on the gooseneck rear upper surface 12 b of the main rail 12. The subframe 22 has bolsters 18 and 20 attached to the bolster 14 at the front end portion of the main rail 12 in association with a height for fixing a container having a relatively long length at the front and rear end portions. . Further, it is stored in the rear end portion of the main frame 16 and can be projected to the rearward projecting limit position (FIG. 1C) or returned to the retracted position (FIG. 1B) in conjunction with the sliding motion of the subframe 22. A flexible telescopic frame 24 is provided. The bolster 14 at the front end portion of the main rail 12 is provided with a container fixing latch 14a (a pin member that can be protruded backward from the rear surface of the bolster 14). , 20 are provided with container fixing twist locks 18a, 20a (see FIG. 2 (c)), and the container fixing twist lock 18a at the front end of the subframe can be moved in and out of the bolster 18 (see FIG. 10). ). The container trailer 10 naturally includes a traveling wheel 26, an air brake for the traveling wheel 26, and an air circuit for air brake (FIG. 11).

As shown in FIGS. 2A and 2B, the container trailer 10 includes a sub-frame 22 on which a 20-foot container 28 is mounted in a state where the telescopic frame 24 is stored at the rear end of the main frame 16. Can be slid between the forward end position (FIG. 2 (a)) contacting the step of the gooseneck 12a of the main rail 12 and the retracted position (FIG. 2 (b)) when retracting the telescopic frame 24. It has become.
Further, with the container not mounted on the subframe 22, as shown in FIG. 2 (c), the telescopic frame 24 is projected to the projecting limit position in conjunction with the backward sliding motion of the subframe 22. Is possible. Similarly, the telescopic frame 24 can be returned to the retracted position in conjunction with the forward sliding operation of the subframe 22 in a state where no container is mounted on the subframe 22. Furthermore, as shown in FIG. 2D, the 40-foot container 30 is mounted across the main frame 16 and the subframe 22 by projecting the telescopic frame 24 to the projecting limit position. Is possible.

Subsequently, each part structure of the container trailer 10 will be specifically described.
The main frame 16 is configured by arranging a pair of main rails 12 parallel to each other at a predetermined interval and firmly fixing with a plurality of reinforcing members such as a cross beam 32 as shown in FIGS. 1 and 3. It is. Further, the main frame 16 includes a forward end position of the sub-frame 22 (FIG. 2A), a retracted position when the telescopic frame 24 is stored (FIG. 2B), and a projecting limit position of the telescopic frame 12. The sub-frame lock pin 34 that fixes the position of the sub-frame 22 at each of the retracted end positions (FIGS. 2C and 2D) when projecting into the sub-frame, the driving means 36 of the sub-frame 22, and the expansion and contraction An expansion / contraction frame lock pin 38 (FIG. 5) is provided to fix the position of the expansion / contraction frame 24 at the storage position and the protruding limit position of the frame 24.

Each component of the main frame 16 will be described in more detail.
First, as shown in FIG. 3B, a pair of left and right subframe lock pins 34 are provided at predetermined three locations on the rear side of the gooseneck 12a of the main rail 12 as shown in FIG. The sub-frame lock pin 34 is slidably supported in the left-right direction by a sleeve 40 (see FIG. 3B) that penetrates the main rail in the left-right direction. The pair of left and right subframe lock pins 34 are connected by a link mechanism 42 so that the movement of the main rail 12 to the outside or inside of the main rail 12 is interlocked, and an operation lever 44 for operating the link mechanism 42 is provided. 42 is attached to the shaft. Further, a coil spring 46 that biases the link mechanism 42 is provided so that the subframe lock pin 34 always protrudes outside the main rail 12. FIG. 4 shows a state in which the coil spring 46 is contracted and the subframe lock pin 34 is immersed inside the main rail. A stopper (not shown) is provided to maintain the coil spring 46 in a contracted state.
A boss 48 for engaging with the sub-frame lock pin 34 is fixed to the bolsters 18 and 20 arranged at the front and rear end portions of the sub-frame 22.

In the embodiment of the present invention, a winch 50 is used as the driving means 36 of the subframe 22 as shown in FIG. The winch 50 is a so-called two-barrel winch, and the wires 52 and 52 wound around the respective trunks pass through the pulleys 54 and 54 pivotally attached to the main rail, and the ends of the respective wires are connected to the subframe 22. The bolster 18 provided at the front end is fixed by a wire clamp 56.
As a power source of the winch 50, any of an electric motor, a hydraulic motor, an air motor, human power, or a combination thereof can be used. Further, a cylinder or the like can be used as the driving means 36.

As shown in FIG. 5, the telescopic frame lock pins 38 are provided in a pair of left and right at the rearmost end portion of the main frame 16. The telescopic frame lock pin 38 is supported by a sleeve 58 penetrating the main rail 12 in the left-right direction so as to be slidable in the left-right direction. An operation lever 62 for inserting the telescopic frame lock pin 38 into a boss 60 provided on the telescopic frame 24 is slidably supported by a stay 64 fixed to the main rail 12. The boss 60 is provided not only at the rear end portion of the telescopic frame 24 but also at the front end portion so that the telescopic frame lock pin 38 coincides with the telescopic frame 24 retracted to the protruding limit position.
It should be noted that the telescopic frame lock pin 38 is interlocked with a hooking mechanism that is provided on the telescopic frame 24, which will be described later, in a state in which the positions in the front-rear direction match (the telescopic frame is in the retracted position). .

  Next, the telescopic frame 24 will be described. As shown in FIG. 6, the telescopic frame 24 protrudes upward from a pair of left and right rails 66 housed in a space sandwiched between the pair of main rails 12 (FIG. 1), and the rear end portions of the rails 66. A subframe stopper 68 that contacts the rear surface of the bolster 20 at the rear end of the subframe 22 (FIGS. 1 and 3), a support 70 that supports the rear end of the subframe 22 from below, and a bolster 20 at the rear end of the subframe 22 A hook 72 (FIG. 5) that selectively engages with the front surface of the hook 72, and a protrusion / retraction mechanism 74 of the hook 72. Similarly to the main frame 16, a pair of left and right subframe lock pins 34 for fixing the position of the subframe 22 are provided near the rear end of the telescopic frame 24 (see FIG. 3).

Here, each component of the telescopic frame 24 will be described in more detail.
The pair of rails 66 of the telescopic frame 24 are formed at a height that can be accommodated in a space sandwiched between the pair of main rails 12 that constitute the main frame 16, and are fixed to each other by horizontal beams 76. A rear end rail 78 is fixed to the rear end portion of the rail 66, and a subframe stopper 68 is fixed to the rear end rail 78. Further, a rear bumper 80 is fixed below the rear end rail 78. As shown in FIG. 9, the support 70 partially overlaps the upper surface 12 b of the main rail 12 at the retracted position of the telescopic frame 24, and the sub rail roller 100 (to be described later) together with the main rail 12 from below. It has a shape that can be supported. In the illustrated example, the support 70 is configured by standing a thick plate vertically at the rear end portion of the rail 66, and the main rail 12 is formed with a notch 12 c for receiving the support 70. . Further, the upper end surface of the support 70 is configured at the same height as the upper surface 12 b of the main rail 12.

  As shown in FIG. 5, the hook 72 and the hook intrusion mechanism 74 are provided in the vicinity of the rear end of the telescopic frame 24. The hook 72 selectively engages with the front surface of the bolster 20 at the rear end portion of the sub-frame 22. An inclined surface 72 a is formed in the front, and the front surface of the bolster 20 is formed at the rear end portion of the inclined surface 72 a. An abutting shoulder 72b is formed and is pivotally attached to the rear end rail 78 of the telescopic frame 24 by a pivot 82 extending in the left-right direction further rearward of the shoulder 72b. Further, a spring receiver 72 c is formed on the hook 72, and a coil spring 84 is provided between the spring receiver 72 c and the rear end rail 78 of the telescopic frame 24. The hook 72 is always urged in the protruding direction (clockwise in FIG. 5A) by the elastic force of the coil spring 84, and the shoulder 72b protrudes from the rear end rail 78.

  Further, one end of a wire 86 is connected to the hook 72, and the other end is connected to one arm 88a of an L-shaped arm 88 that is pivotally attached to a telescopic frame 24 via a pivot 90 extending in the front-rear direction. Yes. Further, an operating pin 92 having a distal end inserted into a boss 60 that penetrates the rail 66 of the telescopic frame 24 is pivotally attached to the other arm 88 b of the L-shaped arm 88. The operation pin 92 is pivotally supported by a bearing 94 fixed to the boss 60 so as to be slidable in the left-right direction.

As described above, since the hook 72 is always urged in the protruding direction, the tip end portion of the operation pin 92 interlocked with the hook 72 via the wire 86 and the L-shaped arm 88 is always as shown in FIG. Furthermore, it is in the protruding position that does not penetrate the boss 60. However, when the telescopic frame lock pin 38 and the boss 60 match (the telescopic frame 24 is in the retracted position), the operation pin 92 is pushed into the back of the boss 60 by the telescopic frame lock pin 38. The L-shaped arm 88 pivotally attached to the operation pin 92 rotates clockwise in FIG. 5B, the wire 86 connected to the L-shaped arm 88 is pulled downward, and the shoulder 72b of the hook 72 is the telescopic frame. 24. On the other hand, when the pushing operation of the operation pin 92 by the telescopic frame lock pin 38 is stopped, the hook 72 rotates in the protruding direction by the elastic force of the coil spring 84, and one arm 88 a of the L-shaped arm is moved upward by the wire 86. Pulled up, the L-shaped arm 88 rotates counterclockwise in FIG. Therefore, the operation pin 92 returns to the protruding position to the position shown in FIG. Further, when the hook 72 is pushed into the telescopic frame 24 against the elastic force of the coil spring 84, the wire 86 is loosened, and the hook 72 is not pushed into the back of the boss 60 by the telescopic frame lock pin 38. Is stored in the telescopic frame 24. The hook 72 operates as described above, and the hook in / out mechanism 74 includes a coil spring 84, a wire 86, an L-shaped arm 88, an operation pin 92, a bearing 94, a boss 60, and the like.
The sub-frame lock pin 34 of the telescopic frame 24 has the same structure as the sub-frame lock pin 34 of the main frame 16 and will not be described in detail.

Next, each component of the subframe 22 will be described in more detail.
As shown in FIG. 7, the bolster 18 is disposed at the front end portion and the bolster 20 is disposed at the rear end portion of the subframe 22, and these bolsters are connected by a pair of rails 96 extending in the front-rear direction. A pair of rails 96 are reinforced by a plurality of transverse beams 98 arranged between the bolsters 18 and 20. The distance in the front-rear direction of the bolsters 18 and 20 is determined according to the 20-foot container 28. The distance between the pair of rails 96 coincides with the pair of main rails 12 of the main frame 16.

  In addition, roller storage frames 102 are provided at four joint portions between the rail 96 and the bolsters 18 and 20. The roller storage frame 102 stores the roller 100 (FIG. 8) for the sub frame 22 to travel on the gooseneck rear upper surface 12 b of the main rail 12. The roller 100 is provided with a flange at least on the outer side in the left-right direction for preventing the roller 100 from falling off the main rail 12 when traveling on the upper surface 12 b of the main rail 12. The roller 100 is supported by a roller holder 104 by a roller shaft 106 extending in the left-right direction. As shown in FIG. 8B, the roller holder 104 is pivotally attached to the roller storage frame 102 by a swing shaft 108 parallel to the roller shaft 106 at a predetermined distance from the roller shaft 106. . Further, a link mechanism 110 that is linked to the cylinder rod 112 a of the cylinder 112 is pivotally attached to the roller shaft 106. Then, the expansion / contraction force of the cylinder rod 112a is increased by the link mechanism 110 and transmitted to the roller shaft 106, and the roller 100 swings about the swing shaft 108 and can move up and down from the lower surface of the subframe 22. It has become. It is necessary to move the roller 100 in and out while the 20-foot container 28 is mounted on the subframe 22. Therefore, in order for the cylinder 112 to exhibit a sufficient driving force, a brake chamber is used in the embodiment of the present invention. Further, all the four rollers 100 provided at the front and rear end portions of the sub-frame are provided with the above-described lifting mechanism.

Further, of the container fixing twist locks 18a and 20a provided at the bolsters 18 and 20 at the front and rear ends of the subframe 22, the container fixing twist lock 18a of the bolster 18 at the front end of the subframe is shown in FIG. As shown, it is configured to appear and disappear. Specifically, the container fixing twist lock 18 a is pivotally attached to the bolster 18 via a pivot 114 extending in the front-rear direction. The bolster 18 has a hole 18b for storing a container fixing twist lock 18a.
It should be noted that the container fixing twist lock 18a can be moved manually.

  FIG. 11 schematically shows an air brake air circuit 116 for the traveling wheels of the container trailer 10. The air circuit 116 is supplied with air from a coupling 118 for connecting to an air hose extending from the tractor. Then, air is supplied to each brake chamber 120 for operating the traveling wheel air brake. A part of the air supplied from the coupling 118 is supplied to the four brake chambers 112 for raising and lowering the rollers 100 of the sub-frame 22.

  Further, the air brake air circuit 116 of the container trailer 10 is provided with a valve 124 for releasing the parking brake. In the illustrated example, the valve 124 is a plunger-type valve that is operated by being pushed by the bolster 18 provided at the front end of the sub frame 22 when the sub frame 22 moves to the forward end position on the main frame 16. Although not shown, a valve for releasing the parking brake is provided in place of the valve 124 or together with the valve 124 at the retracted position of the container fixing twist lock 18a at the front end of the subframe 22. It is also good.

  According to the first embodiment of the present invention having the above-described configuration, the following operational effects can be obtained. First, when the telescopic frame 24 is in the retracted position (FIG. 2A), the main frame 16 is provided with the subframe 22 provided on the upper back surface 12b of the gooseneck 12a of the main rail 12 constituting the main frame 16. The sub-frame 22 is moved to the main frame in a state where the container 28 having a relatively short overall length is placed on the sub-frame 22 by sliding backward by the driving means 36 (FIG. 3A) of the sub-frame 22. It can be moved to the rear end. Then, the bolster at the rear end of the subframe 22 is connected to the subframe stopper 68 protruding upward from the rear end of the pair of left and right rails 66 housed in the space between the pair of main rails 12 of the telescopic frame 24. When the rear surface 20 abuts, the sub-frame 22 stops at the retracted position when the telescopic frame 24 is retracted (FIG. 2B). In this state, since the rear door of the container 28 and the rear end portion of the container trailer 10 coincide with each other, the cargo handling work from the rear of the container trailer is smoothly performed.

  On the other hand, the sub-frame 22 is slid forward by the driving means 36 of the sub-frame 22 so that the sub-frame 22 is placed on the main frame 16 while the container 28 having a relatively short overall length is placed on the sub-frame 22. It can be moved to the forward limit position (FIG. 2 (a)). In this state, the container 28 is in a position where it can travel on the trailer determined by law. Of course, even when the container 28 is not mounted on the subframe 22, the subframe 22 can be moved in the same manner as described above.

Further, the subframe 22 is moved to the rear end portion of the main frame 16 (FIG. 2B), the telescopic frame lock pin 38 is unlocked (FIG. 4), and the subframe 22 is moved backward by the subframe driving means 36. Slide to. At this time, the rear surface of the bolster 20 at the rear end portion of the subframe is in contact with the subframe stopper 68 protruding upward from the rear end portion of the rail of the telescopic frame 24, and the rear end portion of the subframe is a support for the telescopic frame 24. Since it is supported from below by 70, the subframe 22 pushes the telescopic frame 24 backward, and the telescopic frame 24 slides until it projects to the rearward limit position (FIG. 2C). And the position of the expansion-contraction frame 24 can be fixed by the expansion-contraction frame lock pin 38 in the state which the expansion-contraction frame 24 protruded to the protrusion limit position of back.
The rear end of the subframe 22 is always supported by the support 70 of the telescopic frame 24 while the telescopic frame 24 projects to the rearward projecting limit position or returns to the retracted position in conjunction with the sliding motion of the subframe 22. (FIGS. 6 and 9) are supported from below, and the posture is stabilized.

Further, the telescopic frame 24 is provided with a hook 72 that selectively engages with the front surface of the bolster 29 at the rear end of the subframe and a protruding and retracting mechanism 74 of the hook 72, so that the subframe 22 is telescopic. The sub-frame 22 is slid forward by the sub-frame driving means 36 in the state of being in the retracted end position when the frame 24 protrudes to the protrusion limit position (FIG. 2C). The stretchable frame 24 is pulled forward by the hook 72 and follows the subframe 22, and the stretchable frame 24 returns to the retracted position (FIGS. 2A and 2B).
Then, in a state where the telescopic frame 24 is returned to the storage position, the sub-frame driving means 36 removes the sub-frame 22 by immersing the hook 72 in the telescopic frame 24 and releasing the connection of the sub-frame 24 to the telescopic frame 24. Further, it can be slid forward.

  Therefore, the telescopic frame 24 can be expanded and contracted using the subframe driving means 36 as a power source. Further, it is possible to perform a series of operations required for the expansion / contraction operation of the expansion / contraction frame together with the operations required for sliding the subframe. In addition, while the container 30 having a relatively long length can be mounted (FIG. 2D), when the container 28 having a relatively short length is mounted, the telescopic frame 24 is stored in the rear end portion of the main frame 16. Therefore (FIG. 2 (a), (b)), the full length of the container trailer 10 will be shortened.

Moreover, the sub-frame 22 has the forward end position (FIG. 2A), the retracted position when retracting the telescopic frame 24 (FIG. 2B), and the retracting when the telescopic frame 24 projects to the projecting limit position. At each of the end positions (FIGS. 2C and 2D), the position of the sub frame 22 relative to the main frame 16 or the telescopic frame 24 is fixed by the sub frame lock pin 34. Accordingly, the position of the subframe with respect to the main frame 16 is securely fixed except when the subframe 22 is slid.
According to the arrangement of the sub-frame lock pin 34 in the present embodiment, the retracted end position when the sub-frame 22 protrudes to the advanced end position (FIG. 2A) and the extendable frame 24 to the protruding limit position. Each of the bosses fixed to the bolsters 18 and 20 disposed at the front and rear ends of the sub-frame 22 when in the state shown in FIGS. 2C and 2D, that is, when the container trailer 10 is in a travelable state. 48 and the sub-frame lock pin 34 are engaged, and the sub-frame 22 is fixed to the main frame 16 or the telescopic frame 24 at four positions, front, rear, left and right. On the other hand, when the subframe 22 is in the retracted position when the telescopic frame 24 is retracted (FIG. 2B), the boss 48 fixed to the bolster 20 disposed at the rear end of the subframe 22 and the subframe lock pin 34 However, in this case, there is no problem in safety because the container 28 is being handled with a relatively short overall length.

  Further, the telescopic frame lock pin 38 and the hook so that the hook 72 is retracted when the telescopic frame 24 is in the retracted position (FIGS. 2A and 2B) and the telescopic frame lock pin 38 is locked. 72 has a structure that interlocks with the retracting mechanism 74, so that the hook 72 protrudes or retracts in conjunction with the lock / unlock operation of the telescopic frame lock pin 38, which is indispensable for the telescopic work of the telescopic frame 24, and the telescopic frame. The sub-frame 22 is connected to and released from the sub-frame 24, and the workability of the telescopic operation of the telescopic frame 22 is improved.

  Specifically, when the telescopic frame 24 is in the retracted position, the telescopic frame lock pin 38 is pushed into the vehicle body by using the operation lever 62 so that the telescopic frame lock pin 38 is locked and the hook 72 is Stored. By storing the hook 72, the subframe 22 can move forward. In actual operation, when the sub-frame 22 moves backward and exceeds the hook 72, the sub-frame 22 is pulled to the inclined surface 72a in front of the hook even if the telescopic frame lock pin 38 is pulled out and the hook 72 is protruded. When the rear surface of the bolster 20 at the rear end of the frame abuts, the hook 72 is pushed down, and the subframe 22 can smoothly move rearward.

Further, when the sub frame 22 is provided with a roller 100 that can move up and down freely in order to run on the upper surface 12b of the gooseneck of the main rail 12 (FIG. 8), the sub frame 22 needs to be slid. Only, the roller 100 can protrude downward from the subframe 22. And by making the sub-frame 22 float from the gooseneck rear upper surface 12b of the main rail 12, it becomes possible to slide the sub-frame 22 smoothly. On the other hand, when it is necessary to fix the position of the sub-frame 22, the roller 100 is stored in the sub-frame 22 so that the sub-frame 22 is brought into close contact with the gooseneck rear upper surface 12 b of the main rail 12 and the sub-frame 22 is moved to the main frame 12. It can be securely fixed on the rail 16.
Further, the support 70 of the telescopic frame 24 partially overlaps the upper surface 12b of the main rail 12 at the retracted position of the telescopic frame 24 (FIGS. 2A and 2B), and lowers the roller 100 together with the main rail. (FIG. 9), the transfer of the roller 100 of the sub-frame 22 between the main rail upper surface 12b and the support 70 of the telescopic frame 24 is performed smoothly.

Further, in the embodiment of the present invention, the subframe 22 is moved to the forward end position, that is, the container 28 having a relatively short total length is mounted on the subframe 22, and the container 28 is determined by laws and regulations. When the vehicle is in a travelable position on the trailer (FIG. 2A), the parking brake is automatically released by the valve 124 that releases the parking brake, and the container trailer 10 can travel.
Further, when the container fixing twist lock 18a at the front end of the subframe 22 is in the immersive position, that is, the telescopic frame 24 protrudes to the rearward limit position and the subframe is positioned at the retracted end position (FIG. 2 ( c)) In order to mount the container 30 having a relatively long length across the main frame 16 and the subframe 22, the parking brake is automatically released in a state where the twist lock 18a is immersed (FIG. 2 (d)). The container trailer 10 can travel.
In other words, the container trailer 10 according to the embodiment of the present invention can mount a container in both cases of transporting a container having a relatively short total length and transporting a container having a relatively long total length. When it is completed, the parking brake is released, and the operability is improved.

  Subsequently, a container trailer according to a second embodiment of the present invention will be described with reference to FIGS. Note that the same or corresponding portions as those in the first embodiment of the present invention are denoted by the same reference numerals, and detailed description thereof is omitted.

In the second embodiment of the present invention, the main difference from the first embodiment is that, in the first embodiment, the subframe 22 is configured such that the gooseneck rear upper surface 12b of the main rail 16 is disposed on the roller 100. The roller 100 for running on the upper surface 12b of the main rail 16 on the rear side of the gooseneck is provided on the subframe 22 so as to be movable up and down, whereas the second embodiment of the present invention is used. In the form, as shown in FIG. 12, the subframe 22 is provided with slide plates 126 and 128 that are in sliding contact with the gooseneck rear upper surface 12 b of the main rail 12. Therefore, in the second embodiment of the present invention, the slide plates 126 and 128 and the gooseneck rear upper surface 12b of the main rail 12 are always in sliding contact.
As the slide plate 126, a plate made of a member having a relatively high permissible surface pressure such as a high-strength brass alloy in which a solid lubricant (graphite) is embedded is used. On the other hand, the slide plate 128 is a plate made of a member having a relatively low permissible surface pressure, such as ultra high molecular weight polyethylene. Note that the slide plate 126 is limited to a portion where the surface pressure during sliding is increased due to the deflection of the main frame 16. In addition, both of the slide plates 126 and 128 are bolted to the lower surfaces of the pair of rails 96 of the subframe 22. Then, if necessary, a lubricant is applied to the gooseneck rear upper surface 12b of the main rail 16, or the gooseneck rear upper surface 12b is covered with a low friction material such as a stainless steel polishing plate, thereby sliding the slide plates 126 and 128. It is good also to raise.

  Further, as shown in FIG. 13 (a), the main frame 16 has a telescopic frame position as shown in FIG. 2 (a) and the forward end position of the sub-frame 22 (FIG. 2B). In the retracted position during storage (FIG. 2B), auxiliary drive means 130 and 132 that push the subframe 22 in contact with the front or rear surface of the bolster 18 at the front end of the subframe to assist the start-up of the subframe 22. Is provided. The auxiliary drive means 130 and 132 include brake chambers 134 and 136, which are also used as drive means for raising and lowering the roller 100 of the subframe 22 in the first embodiment, as a power source.

  As shown in FIG. 13A, the brake chamber 134 of the auxiliary power means 130 according to the forward end position (FIG. 2A) of the subframe 22 has the piston rod 134a directed rearward. The main rail 16 is fixed to a cross beam 32 connecting the pair of main rails 12 via a bracket 138 so as to fit in a stepped portion between the goose neck 12a and the goose neck rear upper surface 12b. One brake chamber 134 is provided at the center in the vehicle width direction. When the subframe 22 is in the forward end position (FIG. 2A), the piston rod 134a of the brake chamber 134 directly contacts the front surface 18f of the bolster 18 at the front end of the subframe 22. . Then, the sub-frame 22 is pushed backward by the stroke of the piston rod 134a to assist the sub-frame drive means 38 (see FIG. 3A) using the winch 50 as a power source. In the present embodiment, it is desirable that the winch 50 is driven by an air motor. In this case, the air circuit is configured such that the piston rod 134a of the brake chamber 134 extends in conjunction with the start command of the winch 50. Is configured.

  On the other hand, as shown in FIGS. 13B, 14A and 14B, the brake chamber 136 of the auxiliary power means 132 in the retracted position (FIG. 2B) when retracting the telescopic frame is provided with a piston rod 136a. In order to prevent interference with the subframe 22, the horizontal beam 32 connecting the pair of main rails 12 behind the gooseneck 12 a is placed below the gooseneck rear upper surface 12 b via the bracket 140. So that it is fixed. One brake chamber 136 is provided at the center in the vehicle width direction. A seesaw arm 144 is pivotally attached to the bracket 140 by a pivot 142 extending in the vehicle width direction. A piston rod 136 is pivotally attached to one end portion 144 a of the seesaw arm 144, and a roller 146 is pivotally attached to the other end portion 144 b of the seesaw arm 144. A roller 146 fixed to the end of the seesaw arm 144 protrudes from the gooseneck rear upper surface 12b, and the power of the brake chamber 136 fixed so as to fit below the gooseneck rear upper surface 12b is transmitted to the subframe 22. It is possible to communicate. Further, an engaging claw 150 is pivotally attached to the rear surface 18r of the bolster 18 at the front end of the subframe 22 via a pivot 148 extending in the vehicle width direction. The engaging claw 150 is shown in FIG. It can swing between an engagement position indicated by a solid line and a non-engagement position indicated by a two-dot difference line.

The engaging claw 150 is retracted upward so as to avoid the roller 146 at the non-engaging position indicated by a two-dot chain line in FIG. In order to project to the projecting limit position (FIG. 2C), it is possible to slide further backward beyond the retracted position (FIG. 2B) when retracting the telescopic frame.
On the other hand, at the engagement position indicated by the solid line in FIG. 13B, the engagement claw 150 overlaps the roller 146 of the seesaw arm 144 in the height direction. Note that the engaging claw 150 has a swing angle limited by an interlocking mechanism to be described later, and the engagement position indicated by the solid line becomes the swing end, and the angle changes beyond this (clockwise in the figure). Is blocked. When the sub-frame 22 is in the retracted position (FIG. 2B) when retracting the telescopic frame, and the engaging claw 150 is in the engaging position indicated by the solid line, the piston rod 136a of the brake chamber 136 is extended. The operation is transmitted to the engaging claw 150 through the seesaw arm 144a and the roller 146. That is, the extension operation of the piston rod 136a that expands and contracts backward is converted into the swinging motion of the roller 146 forward by the seesaw arm 144, and the sub-frame 22 is pushed forward by the roller 146 to drive the winch 50. The sub-frame driving means 38 (see FIG. 3A) as a source is assisted. Note that an air circuit is also configured for the brake chamber 136 so that the piston rod 136a expands in conjunction with the start command of the winch 50.

As described above, the auxiliary power unit 132 and the subframe 22 can be arbitrarily released from the engagement state. The seesaw arm 144, the roller 146, and the engagement claw 150 allow the telescopic frame 24 to be When the sub-frame 22 slides to the rearward limit position (FIG. 2C) or returns to the retracted position (FIG. 2B) in conjunction with the sliding motion of the sub-frame 22, the auxiliary drive means 132 and the sub-frame 22 A release means 152 for releasing the engagement is configured.

Further, as shown in FIG. 14, the release means 132 is interlocked with the operation of immersing the container fixing twist lock 18 a at the front end of the subframe 22 into the immersing position (arrow A in FIG. 14B). An interlocking mechanism 154 for releasing the engagement between the auxiliary driving means 132 and the sub-frame 22 (bolster 18) is provided.
This interlocking mechanism 154 has the following structure. First, one end of a rod 158 is pivotally attached to a cam 156 fixed to a pivot 114 (see FIG. 10) of a container fixing twist lock 18a. Further, the other end of the rod 158 is forward and backward with respect to the bolster 18. It is pivotally attached to one side 162a of an L-shaped cam 162 that is pivotally attached via a pivot 160 extending to the side. On the other side 162b of the L-shaped cam 162, a pin 164 is fixed horizontally, and the pin 164 contacts the L-shaped pin 166 that rotates integrally with the engaging claw 150 of the releasing means 152 from below. . When the container fixing twist lock 18 a is inserted, the cam 156 also rotates in the direction of arrow A, and the operation is transmitted to the L-shaped cam 162 via the rod 158 and is fixed to the L-shaped cam 162. The pin 164 pushes up the L-shaped pin 166, and the engaging claw 150 can be rotated to the non-engaging position indicated by the two-dot chain line in FIG. On the other hand, by raising the stored container fixing twist lock 18a, the interlocking mechanism 154 can return the engagement claw 150 to the engagement position shown by the solid line in FIG. 13B. .
Note that the link mechanism that constitutes the interlocking mechanism 154 according to the present embodiment is merely an example, and a link mechanism having a different structure that performs the same operation can also be used. Further, the interlocking mechanism 154 may be replaced with the mechanical link mechanism as described above, and the engaging claw 150 may be driven by an electric motor, an air cylinder, or the like in conjunction with the retracting operation of the container fixing twist lock 18a.

Further, in the present embodiment, unlike the first embodiment, as shown in FIGS. 15 to 17, the subframe lock pins 34 are not on the main frame 12 but on the front, rear, left and right 4 of the subframe 22. It is provided in the place. All the subframe lock pins 34 can be interlocked by one operation lever 44. As shown in FIG. 17, the subframe lock pin 34 is slidably supported in the left-right direction by a sleeve 40 fixed to the lower surface of the bolsters 18, 20 of the subframe 22. Also, as shown in FIG. 16, the subframe lock pin 34 includes the seesaw arm 168 and the rod 170 so that the movement of the pair of left and right subframe lock pins 34 to the outside or the inside of the main rail 12 is interlocked. Are connected by a left-right interlocking link mechanism 174 comprising a T-arm 172. An operation lever 44 for operating the left / right interlocking link mechanism 174 is pivotally attached to the T-arm 172. Further, a coil spring 46 that biases the left-right interlocking link mechanism 174 is provided so that the subframe lock pin 34 always protrudes to the inside of the main rail 12. 15 to 17 show a state in which the coil spring 46 is extended and the sub-frame lock pin 34 is engaged with a boss 48 fixed so as to penetrate the main rail. Further, a stopper (not shown) is provided for maintaining the coil spring 46 in a contracted state. Further, as shown in FIG. 15, the T-arms 172 of the left-right interlocking link mechanism 174 of the sub-frame lock pins 34 provided at the front and rear of the sub-frame 22 are connected by rods 176 so that all the The sub-frame lock pin 34 is linked by a single operation lever 44 so as to be interlocked.
The structure in which the subframe lock pin 34 is provided on the subframe 22 and all of the subframe lock pins 34 are linked so as to be interlocked by one operation lever 44 is also adopted in the first embodiment of the present invention. It is possible.

  In the present embodiment, as shown in FIG. 18, a link mechanism 178 is provided so that a pair of left and right telescopic frame lock pins 38 can be interlocked by a single operation lever 62. The link mechanism 178 of the telescopic frame lock pin 38 has the same configuration as the left-right interlocking link mechanism 174 (seesaw arm 168, rod 170, T-arm 172) of the sub-frame lock pin 34. Detailed description is omitted.

In addition, in this embodiment, the slide plate 126, 128 and the gooseneck rear upper surface 12b of the main rail 12 employ a slide mechanism in which the slide plate is always in sliding contact. Therefore, the roller 100 in the first embodiment is used. The support 70 of the telescopic frame 24 (and the notch 12c of the main rail 12 (FIG. 9)) that facilitates transfer is not necessarily required, but the structure of the other telescopic frame 24 is the same as that of FIG. . Further, the hook in / out mechanism 74 is the same as that in the first embodiment shown in FIG.
In addition, the air brake air circuit 116 for the traveling wheel of the container trailer 10 is also an alternative to eliminating the need for air supply lines to the four brake chambers 112 for raising and lowering the rollers 100 of the subframe 22 in FIG. In addition, the second embodiment is the same as the first embodiment except that air supply pipes to the brake chambers 134 and 136 are provided.

According to the second embodiment of the present invention having the above configuration, the following operational effects can be obtained. First, since the sub-frame 22 is provided with slide plates 126 and 128 that are in sliding contact with the gooseneck rear upper surface 12b of the main rail 12, the subframe 22 can be smoothly moved with respect to the gooseneck rear upper surface 12b of the main rail 12. It can be slid.
Moreover, the slide plate 126 is used in a portion where the surface pressure during sliding is increased due to the deflection of the main frame 16, and a member having a relatively high allowable surface pressure is used. On the other hand, the other portion of the slide plate 128 uses a member having a relatively low permissible surface pressure, which is necessary while suppressing the use of a high cost high permissible surface pressure member within a certain range. It becomes possible to obtain sliding performance.

  Further, since the sub-frame 22 is always in sliding contact with the gooseneck rear upper surface 12b of the main rail 12 via the slide plates 126 and 128, the slide plate is used when the sub-frame 22 is started from a stopped state. A relatively large static frictional force acts between 126, 128 and the gooseneck rear upper surface 12b of the main rail 12. In particular, when the subframe 22 is activated backward from the forward end position (FIG. 2A) and when activated from the retracted position (FIG. 2B) when retracting the telescopic frame. The sub-frame may be activated in a state where the container 28 having a relatively short overall length is placed on the sub-frame 22 (FIGS. 2A and 2B). The static friction force which acts between 22 and the gooseneck back upper surface 12b of the main rail 12 becomes a bigger thing. Therefore, the auxiliary driving means 130 and 132 come into contact with the bolster 18 at the front end of the subframe 22 to push out the subframe 22 and assist the subframe driving means 36 so that the subframe 22 can be started up smoothly. Is possible. Further, by providing the auxiliary power means 130 and 132, it is not necessary to increase the driving force of the sub-frame driving means 36.

  When the telescopic frame 24 projects to the rearward projecting limit position (FIG. 2C) or returns to the retracted position (FIG. 2B) in conjunction with the sliding motion of the subframe 22, The frame 22 needs to move to a rear position beyond the retracted position when the telescopic frame 24 is stored. At this time, the auxiliary drive means that abuts against the rear surface of the bolster at the rear end portion of the subframe and pushes out the subframe becomes a protrusion that obstructs the movement of the subframe. Therefore, when the retracting means 152 (FIGS. 13 and 14) causes the telescopic frame 24 to project to the rearward projecting limit position in conjunction with the sliding motion of the subframe 22 or return to the retracted position, auxiliary driving means. When the engagement between the sub-frame 22 and the sub-frame 22 is released, the sub-frame 22 can be moved when the telescopic frame 24 is stretched.

  Further, it is necessary to cause the telescopic frame 24 to project to the rearward projecting limit position (FIG. 2C) in conjunction with the sliding motion of the subframe 22, because the container 30 having a relatively long overall length (FIG. 2D). )) Is placed across the main frame 12 and the sub-frame 22. At this time, the container fixing twist lock at the front end of the sub-frame 22 is not required and must be stored in the immersive position. Further, the container fixing twist lock 18a at the front end portion of the subframe 22 is exposed on both side portions of the vehicle body, so that the operator can relatively easily move in and out. Therefore, the interlocking mechanism 154 (FIG. 14) and the auxiliary driving means 132 by the releasing means 152 are interlocked with the immersion operation of the container fixing twist lock 18a at the front end of the subframe 22 (arrow A in FIG. 14B). By performing the operation of releasing the engagement with the subframe 22, the operation of releasing the engagement between the auxiliary drive means 132 and the subframe 22 becomes easy.

In addition, subframe lock pins 34 (FIGS. 15 to 17) provided at four positions on the front, rear, left, and right of the subframe 22 can be operated simultaneously by operating one operation lever 44, and the subframe 22 can be moved relative to the main frame 16. Position fixing and position fixing releasing operations are facilitated.
In addition, detailed description of the same effects as those of the first embodiment of the present invention will be omitted.

It is a perspective view of the container trailer which concerns on embodiment of this invention, (a) is a general view which shows the retracted state of an expansion-contraction frame, (b) is a fragmentary figure which shows the state which has an expansion-contraction frame in a protrusion limit position. It is a side view which shows each aspect of the container trailer shown in FIG. 1, (a) shows the driving | running | working possible state at the time of 20 feet type container loading, (b) shows the cargo handling work state at the time of 20 feet type container loading, (C) shows a state in which the telescopic frame is at the projecting limit position, and (d) shows when the 40-foot type container is mounted. It is a schematic diagram which shows the part behind the goose neck of the main frame of the container trailer shown in FIG. 1, (a) shows a subframe and an expansion-contraction frame superimposed on the main frame, (b) excludes a subframe. It is shown. FIG. 2 is a cross-sectional view in the width direction of a main frame and a sub frame of the container trailer shown in FIG. 1. (A) is a side view which shows the hook provided in the expansion-contraction flame | frame of the container trailer shown in FIG. 1, and the hooking mechanism, (b) is the back view. It is a telescopic frame single-piece | unit figure of the container trailer shown in FIG. 1, (a) is a top view, (b) is a side view, (c) is a rear view. It is a single figure of the sub-frame of the container trailer shown in FIG. 1, (a) is a top view, (b) is a side view. It is a figure which shows the roller raising / lowering mechanism of the sub-frame of the container trailer shown in FIG. 1, (a) is a top view, (b) is a side view. It is a schematic diagram which shows the overlap state of the support which supports the roller of the subframe provided from the downward direction of the container trailer shown in FIG. 1, and a main rail. It is a figure which shows the raising / lowering mechanism of the twist lock for container fixation of a sub-frame front end part of the container trailer shown in FIG. 1, (a) is a top view, (b) is a side view, (c) is a rear view. It is an air circuit diagram for an air brake of the container trailer shown in FIG. FIG. 2 shows a subframe of a container trailer according to a second embodiment of the present invention, where (a) is a side view, (b) is an enlarged view of part B of (a), and (c) is (b). It is arrow C figure. It is a side view which shows the auxiliary | assistant drive means of a sub-frame of the container trailer which concerns on the 2nd Embodiment of this invention, (a) is an advance end part position, (b) is related to the retracted position at the time of retracting | extension frame. The auxiliary drive means is shown. The container trailer according to the second embodiment of the present invention releases the engagement between the auxiliary drive means and the subframe in conjunction with the operation of immersing the container fixing twist lock at the front end of the subframe into the immersive position. The interlocking mechanism is shown, (a) is a plan view and (b) is a rear view. It is a top view of a subframe of a container trailer concerning a 2nd embodiment of the present invention. (A) is the D section enlarged view of FIG. 15, (b) is a side view of (a). It is arrow E figure of Fig.16 (a). It is a rear view which shows the link mechanism of the expansion-contraction frame lock pin of the container trailer which concerns on the 2nd Embodiment of this invention.

Explanation of symbols

  10: Container trailer, 12: Main rail, 12a: Gooseneck, 12b: Gooseneck rear upper surface, 14: Bolster, 14a, 18a, 20a: Twist lock for container fixing, 16: Main frame, 18, 20: Bolster, 22: Sub Frame, 24: telescopic frame, 28: 20 feet container, 30: 40 feet container, 34: subframe lock pin, 36: driving means for subframe, 38: telescopic frame lock pin, 66: rail, 68: sub Frame stopper, 72: hook, 74: hook in / out mechanism, 84: coil spring, 86: wire, 88: L-arm, 92: operation pin, 96: rail, 100: roller, 106: roller shaft, 108: rocking Driving shaft, 110: Link mechanism, 112: Cylinder, 116: Air Road, 120, 122: brake chamber, 124: valve, 126, 128: slide plate, 130, 132: auxiliary drive means, 134, 136: brake chamber, 134a, 136a: piston rod, 138, 140: bracket, 142: Pivot, 144: Seesaw arm, 144a: One end, 144b: The other end, 146: Roller, 148: Pivot, 150: Engaging claw, 152: Release means, 154: Interlocking mechanism, 156: Cam, 158: Rod, 160: Pivot, 162: L-shaped cam, 162a: One side, 162b: Another side, 164: Pin, 166: L-shaped pin, 168: Seesaw arm, 170: Rod, 172: T-shaped arm, 174: Left / right interlock Link mechanism, 176: Rod, 178: Link mechanism

Claims (13)

A main frame in which a pair of left and right main rails on which a gooseneck is formed are fixed by a plurality of cross beams, and a bolster is supported at the front end;
A subframe that is slidably arranged back and forth on the back upper surface of the gooseneck of the main rail and has a bolster at the front and rear ends;
A telescopic frame that is stored at the rear end of the main frame, protrudes to a rearward limit position in conjunction with a sliding motion of the subframe, or can be returned to a storage position;
The bolster at the front end of the main rail is provided with a container fixing latch, the bolster at each of the front and rear ends of the subframe is provided with a container fixing twist lock, and the container fixing twist lock at the front end of the subframe. Is a container trailer characterized in that it can be moved up and down. The main frame includes the sub frame at each of the forward end position, the retracted position when retracting the telescopic frame, and the retracted end position when projecting to the projecting limit position of the telescopic frame. A sub-frame lock pin for fixing the position of the frame, a driving means for the sub-frame, and an expansion / contraction frame lock pin for fixing the position of the expansion / contraction frame at the storage position and the protruding limit position of the expansion / contraction frame;
The telescopic frame protrudes upward from the rear end of the pair of left and right rails accommodated in the space sandwiched between the pair of main rails, and comes into contact with the rear surface of the bolster at the rear end of the subframe. A subframe stopper, a support for supporting the rear end portion of the subframe from below, a subframe lock pin for fixing the position of the subframe, and a hook that selectively engages the front surface of the bolster at the rear end portion of the subframe. The container trailer according to claim 1, further comprising a hook protruding and retracting mechanism. The telescopic frame lock pin and the hook retracting mechanism are interlocked so that the telescopic frame is in a retracted position and the hook is retracted when the telescopic frame lock pin is locked. The container trailer according to claim 2. The sub-frame is provided with a roller for running up and down on the upper surface behind the gooseneck of the main rail, and the support of the telescopic frame is partially connected to the upper surface of the main rail at the retracted position of the telescopic frame. The container trailer according to claim 2 or 3, wherein the container trailer has a shape capable of overlapping and supporting the roller together with the main rail from below. A traveling wheel, an air brake for the traveling wheel, and an air circuit for the air brake, wherein the air brake air circuit includes a twist lock immersing position of the container fixing twist lock at the front end of the subframe, The container trailer according to any one of claims 1 to 4, wherein a valve for releasing the parking brake is provided. The main frame is provided with an extension frame lock pin for fixing the position of the extension / contraction frame at the storage position and the protruding limit position of the extension / contraction frame, and the driving means of the sub frame.
The telescopic frame protrudes upward from the rear end of the pair of left and right rails accommodated in the space sandwiched between the pair of main rails, and comes into contact with the rear surface of the bolster at the rear end of the subframe. A subframe stopper, a subframe lock pin that fixes the position of the subframe, a hook that selectively engages the front surface of the bolster at the rear end of the subframe, and a hooking mechanism for the hook,
The sub-frame is fixed to each of the forward end position relative to the main frame, the retracted position when the telescopic frame is stored, and the retracted end position when the telescopic frame protrudes to the projecting limit position. The container trailer according to claim 1, wherein a lock pin is provided. The container trailer according to claim 6, wherein the sub-frame is provided with a slide plate that is in sliding contact with the upper back surface of the gooseneck of the main rail. In the slide plate, a member having a relatively high permissible surface pressure is used in a portion where the surface pressure during sliding is high due to the deflection of the main frame, and a relatively permissible surface pressure is used in other portions. The container trailer according to claim 7, wherein a member having a low height is used. The main frame pushes the sub frame in contact with the bolster at the front end of the sub frame at the forward end position of the sub frame and the retracted position when the telescopic frame is retracted to assist the start of the sub frame. The container trailer according to any one of claims 6 to 8, wherein auxiliary drive means is provided. In the retracted position of the subframe when the telescopic frame is retracted, the telescopic frame protrudes to the rearward projecting limit position in conjunction with the sliding motion of the subframe in the auxiliary driving means that assists in starting the subframe. The container trailer according to claim 9, further comprising release means for releasing the engagement with the sub-frame when returning to the storage position. The releasing means is provided with an interlocking mechanism for releasing the engagement between the auxiliary driving means and the subframe in conjunction with the immersion operation of the container lock twist lock at the front end of the subframe. The container trailer according to claim 10, wherein: The sub-frame lock pins provided in the sub-frame are provided at least at four positions on the front, rear, left and right sides of the sub-frame, all of which are linked so as to be interlocked by one operation lever. The container trailer according to any one of claims 5 to 11. A traveling wheel, an air brake for the traveling wheel, and an air circuit for air brake, and the air circuit for air brake is provided with a valve for releasing the parking brake at the forward end position of the sub-frame. The container trailer according to any one of claims 1 to 12, wherein the container trailer is provided.

Images