JP5380159B2 - Cargo handling vehicle - Google Patents

Description

  The present invention relates to a cargo handling vehicle equipped with a detachable container, in particular, a container mounted on a chassis, capable of dumping on the chassis and loading and unloading between the chassis and the ground. This relates to a dumping operation that is performed safely and accurately.

Conventionally, a dumping frame pivotally supported on a chassis of a cargo handling vehicle is pivotally supported so that the cargo handling frame can be pivoted back and forth, and an L-shaped arm that is provided on the cargo handling frame can be expanded and contracted. lashing the dump frame and the spreader by lashing member by utilizing the found so as to be performed prior to the tilt motion of the container, tilted integrally leave spreader elongation state L-shaped arm with the dump frame A container that dumps a container on a chassis is known (see Patent Document 1 below).

Japanese Patent No. 2918786

  By the way, in the cargo handling vehicle disclosed in the above-mentioned Patent Document 1, the securing device for preventing the cargo handling frame and the dump frame from being bent at the time of dumping the container includes the securing member and the object to be secured by the biasing force of the spring. The dumping frame and the cargo handling frame are held in a locked state by engaging the member.

  However, when the lashing force due to the urging force of the spring becomes weak due to aging of the spring, the lashing device cannot obtain the desired engaging force, and the tying member and the tying member are not engaged. In such a case, there is a problem in that the cargo handling frame and the dump frame are broken during the dumping operation of the container, and in the worst case, the container is dropped.

  The present invention has been made in view of such circumstances, and the locking device that supports the container and holds the lift arm and the dump arm in a locked state is always reliably operated without depending on the biasing force of the spring. An object of the present invention is to provide a new cargo handling vehicle that can ensure the reliability and safety of the dumping operation.

In order to achieve the above object, the invention according to claim 1 is characterized in that a dump arm is pivotally supported at a rear portion on a chassis, and a lift arm is pivotally supported on the dump arm so as to be able to swing up and down. At the tip of the lift arm, a hook arm having a hook that can be engaged with and disengaged from the lift bar of the container is slidable in the front-rear direction, and the dump arm and the lift arm are aligned in a straight line by a lock device provided between them. In a cargo handling vehicle that locks and dumps containers mounted on dump arms and lift arms,
The hook arm and the locking device are connected by an interlocking mechanism,
An engagement dog fixed to the hook arm, a lever having a free end movably engaged on an engagement surface of the engagement dog and pivotally supported by the lift arm, and the lever The rod has a rod for connecting to the lock device, and this rod can be reciprocated by a swing of a lever accompanying the sliding movement of the hook arm, and the lock device can be switched between a lock position and a lock release position. And
When the hook arm is in a dump position for dumping a container mounted on the dump arm and the lift arm, the lock device is held in the lock position .

In order to achieve the above object, the invention according to claim 2 is the invention according to claim 1, in which the interlocking mechanism always keeps the locking device in the locked position regardless of the position of the hook arm during the dumping operation of the container. It is characterized by holding.

According to the first aspect of the present invention, when the container is dumped, the lock device for locking the lift arm and the hook arm in a straight line is always held in the locked position by the operation of the rod of the interlocking mechanism. The arm does not break, and the safety and reliability of the container dumping operation can be ensured.

  According to the invention of claim 2, during the dumping operation of the container, even if the lift arm contracts with respect to the dump arm, the lock device securely locks the dump arm and the lift arm, Further safety and reliability of the dumping work can be ensured.

Side view of the cargo handling vehicle showing the state when container loading is complete (during travel) 2 plan view of FIG. Side view along line 3-3 in FIG. Enlarged view of the phantom line encircled portion shown in FIG. Enlarged view of arrow 5 in FIG. Side view of the cargo handling vehicle showing the state when the container is dumped Side view of a cargo handling vehicle showing the state immediately before the container is lowered Fig. 8 arrow view Fig. 9 arrow 9 view Side view of a cargo handling vehicle showing the state during the unloading of the container Side view of a cargo handling vehicle showing the state immediately after the container is lowered FIG. 4 is a diagram corresponding to FIG. 4 according to the second embodiment of the present invention. FIG. 13 arrow 13 view

  Embodiments of the present invention will be specifically described below based on the embodiments of the present invention illustrated in the accompanying drawings.

  First, the first embodiment of the present invention will be described with reference to FIGS.

  1 and 2, the subframe 1 is integrally mounted on the chassis F of the cargo handling vehicle V. The sub-frame 1 is formed in a rectangular frame shape that is longer in the front-rear direction and a plurality of horizontal girders, and left and right guide rollers 2 and 2 are rotatable at the rear left and right of the sub-frame 1. These guide rollers 2 and 2 are guided to guide a container Ct (described later) that is detachably mounted on the subframe 1.

  A dump arm 3 is provided at the rear of the subframe 1 so as to be capable of dumping backward. The dump arm 3 is formed in a foreground plan view with an open front end integrally formed at the rear ends of the left and right vertical girders, and the rear end thereof is around the same axis as the rotation axis of the left and right guide rollers 2 and 2. The shaft 4 is supported so that it can be swung up and down in the front and rear direction.

A lift arm 6 is pivotally supported at the front portion of the dump arm 3 so as to be able to undulate and rotate in the front-rear direction with a support shaft 9 that is horizontally mounted thereon. The lift arm 6 is formed in a hollow rectangular tube shape and extends in the front-rear direction at the left and right intermediate portions of the subframe 1, and the rear portion overlaps with the dump arm 3 in the front-rear direction. The arm 3 extends forward.

  As shown in FIGS. 4 and 5, a bracket 10 is welded to the front portion of the lift arm 6. A pair of support arms 10a and 10a projecting obliquely forward on both sides of the bracket 10 are integrally projected, and levers 23 and 23 of an interlocking mechanism RM described later are provided on the support arms 10a and 10a. It is pivotably supported.

  A hook arm 7 is fitted to the front portion of the lift arm 6 so as to be slidable in the front-rear direction of the chassis F, and the lift arm 6 and the hook arm 7 constitute a cargo handling arm 5. The hook arm 7 is formed in an L-shape as viewed from the side by a base portion 7a extending in the front-rear direction and an upright portion 7b that stands integrally at a substantially right angle from the front end of the base portion 7a. 8 (see FIGS. 1 and 3) are integrally provided. The container hook 8 can be detachably engaged with a lift bar 17 provided on an upper front surface of a container Ct described later. In the cargo handling arm 5, that is, in the lift arm 6 and the hook arm 7, a single slide cylinder 13 is accommodated so as to straddle them, and one end of the slide cylinder 13 is connected to the lift arm 6, The other end is connected to the hook arm 7, and by extending and retracting the slide cylinder 13, the hook arm 7 can be slid back and forth with respect to the lift arm 6. It can be held at the rear end position.

  At the front part of the subframe 1, the base ends of the pair of lift cylinders 14 and 14 are pivotally supported so as to be rotatable in the vertical direction. These lift cylinders 14, 14 extend rearward along the outside of the lift arm 6, and their tips are connected to a connecting shaft 15 that is horizontally mounted on the lift arm 6. By the synchronous expansion / contraction operation of the pair of lift cylinders 14 and 14, the cargo handling arm 5 including the lift arm 6 and the hook arm 7 can be swung up and down around the center of rotation, that is, around the support shaft 9 (see FIG. 10). ).

As shown in FIGS. 2 to 5, locking devices LO, which lock the lift arm 6 and the dump arm 3 to the left and right side surfaces of the lift arm 6 and the dump arm 3 linearly in the front-rear direction and release the lock. LO is provided. Locking device LO, LO, at both sides of the lift arm 6, a pair of hooks 20, 20 are rotatably supported on both ends of the connecting shaft 15 is fixed to the front end of the dump arm 3, a pair of hooks 20 , 20 are configured to be detachably engageable with a pair of lock pins 21, 21. When the pair of hooks 20, 20 and the pair of lock pins 21, 21 are engaged, the lift arm 6 and the dumper The arm 3 is held in the lock position, and when the engagement is released, they are held in the lock release position.

Between the lift arm 6 and the hook arm 7, the hook arm 7 slides back and forth between the dump position (front end position) and the dump release position (rear end position) with respect to the lift arm 6. Then, a pair of left and right interlocking mechanisms RM, RM for operating the locking devices LO, LO are provided. The interlocking mechanisms RM, RM are provided on both sides of the front portion of the lift arm 6 with levers 23, 23 pivotally supported 24, 24 on the support arms 10a, 10a of the bracket 10 so as to swing back and forth, One end of the pin 23 is connected to the base end of the pin 23 and extended rearward along both sides of the lift arm 6. The other end of the rod is connected to the intermediate portion of the hooks 20 and 20 and is connected to the rod 29 and 29. 27 and 27, and the rods 27 and 27 have turnbuckles and are configured to be adjustable in length. Roller rollers 25 and 25 are rotatably supported at the front ends (free ends) of the levers 23 and 23 and are disposed in front of the lift arm 6 and close to both side surfaces of the hook arm 7.

A pair of engaging dogs 30, 30 are fixed to the front and rear intermediate portions of both side surfaces of the hook arm 7, and a pair of release dogs 31, 31 are fixed to the front portions of both side surfaces. ing. These dogs 30, 30, 31, 31 are at positions corresponding to the tips of the levers 23, 23, and as shown in FIGS. 4 and 5, the hook arm 7 moves forward and is at the dump position (front end position). When the upper surfaces of the engagement dogs 30 and 30 are engaged with the rolling rollers 25 and 25 at the ends of the levers 23 and 23, the levers 23 and 23 are pivoted around the points 24 and 24 in FIG. Forcibly swing, the rods 27 and 27 are moved rearward and the hooks 20 and 20 are rotated in the direction of the arrow a ′ in FIG. 5, and the hooks 20 and 20 are engaged with the lock pins 21 and 21, The lock devices LO and LO are held at the lock position. Thereby, the lift arm 6 and the hook arm 7 are locked in a straight line, and the container Ct mounted on them can be dumped as will be described later. Also, as shown in FIGS. 8 and 9, when the hook arm 7 moves backward and reaches the dump release position (rear end position), the release dogs 31 and 31 are now the rolling rollers at the tips of the levers 23 and 23, respectively. Figure 8 engaged with the lever 23 around the axis supporting 24, 24 points to 25, 25, swings in the direction of arrow b, by moving the rod 27 forward, 9 hooks 20, 20 , It is rotated in the direction of the arrow b ', and is disengaged from the lock pins 21, 21 to hold the left and right lock devices LO, LO in the unlocked position. Thereby, the lock | rock of the lift arm 6 and the hook arm 7 is cancelled | released, and the container Ct mounted on them can be dropped on the ground so that it may mention later.

By the way, as shown in FIGS. 4 and 8, a pair of support arms 10a and 10a project obliquely forward integrally to the brackets 10 and 10 welded to the opening front end of the lift arm 6, and these support arms 10a and 10a, At the free end of 10a, the levers 23, 23 of the interlocking mechanisms RM, RM are pivotally supported 24, 24, and the rolling rollers 25, 25 at the front end thereof are connected to the engagement dogs 30, 30 in front of the lift arm 6, respectively. Since the rolling rollers 25 and 25 at the tips of the levers 23 and 23 are engaged with the engaging dogs 30 and 30, the rolling rollers 25 and 25 are provided on the side surfaces of the lift arm 6. It is not necessary to make an entry hole for entering, and the strength of the lift arm 6 can be prevented from being lowered.

  As shown in FIGS. 4 and 5, on one side of the lift arm 6, a first proximity sensor S <b> 1 is attached to the free end of the support arm 10 a, while on the front side of one side of the hook arm 7, The first dog D1 is attached corresponding to the first proximity sensor S1, and when the hook arm 7 slides to the rear end position, the first proximity sensor S1 detects the first dog D1, and the hook arm 7 Detects that the slide movement to the rear end position has been completed.

  The first dog D1 may also be used as the release dog 31.

  4 and 5, a second proximity sensor S2 is attached to the lower surface of the front portion of the lift arm 6. The second proximity sensor S2 has a rear end of the hook arm 7 at the upper side thereof. It is detected that the hook arm 7 has completed the sliding movement to the front end position.

  Further, as shown in FIG. 3, a third proximity sensor S3 is attached to the rod of the lift cylinder 14, and this third proximity sensor S3 detects the end face of the cylinder barrel of the lift cylinder 14, that is, the lift cylinder. It detects that 14 has contracted and detects that rotation of lift arm 6 to the front was completed.

  Engagement hooks 33, 33 are fixed to the left and right sides of the dump arm 3, while engagement pins 34, 34 that can be engaged with and disengaged from the engagement hooks 33, 33 protrude from the left and right sides of the container Ct. When the container Ct is mounted at the storage position (traveling position) on the chassis F, the engagement pins 34 and 34 engage with the engagement hooks 33 and 33 to bring the container Ct to the storage position. Lock.

  An outrigger 19 is provided at the rear portion of the chassis F, and this outrigger 19 is actuated to stabilize the cargo handling vehicle V when the container Ct is loaded or unloaded or dumped.

  On the other hand, the container Ct mounted on the chassis F of the cargo handling vehicle V is formed in a box shape, and its rear open surface is closed by a rear gate 18, and a container hook 8 of the hook arm 7 is formed on the upper part of the front wall. A lift bar 17 that can be engaged and disengaged is provided, and a plurality of traveling wheels 16 made of casters are pivotally supported in the front and rear of the bottom portion.

  Next, the operation of the first embodiment will be described.

“When dumping container Ct mounted on chassis F”
As shown in FIG. 1, the container Ct is mounted on the subframe 1 of the chassis F of the cargo handling vehicle V, and the hook arm 7 is in the dump position, that is, the front end position (vehicle traveling position). In this state, the pair of engagement dogs 30 and 30 are engaged with the distal ends of the levers 23 and 23, and the lock devices LO and LO are held in a locked state via the interlocking mechanisms RM and RM so that the dump arm 3 and the cargo handling arm are held. 5 (the lift arm 6 and the hook arm 7) are integrally locked in a straight line, and if the lift cylinders 14 and 14 are extended in this state, the lock devices LO and LO are locked as shown in FIG. Maintaining the locked state, the dump arm 3 and the cargo handling arm 5 are integrally tilted backward around the four pivots to dump the container Ct, and discharge the load in the container Ct to the outside. Can do. Further, if the lift cylinder 14 is contracted, the container Ct can be lowered and lowered onto the subframe 1.

By the way, in each lock device LO, the rod 27 of the interlocking mechanism RM is connected to the hook 20, and the rod 27 is moved depending on the sliding movement of the hook arm 7, and the hook 20 connected to this moves to the lock position. Since it is held, the lift arm 6 and the dump arm 3 are always securely locked over a long period of time, and there is no possibility that they will break, ensuring the safety and reliability of the dumping operation of the container Ct. The

  If the lift cylinders 14 and 14 are contracted, the container Ct can be lowered and lowered onto the subframe 1.

"When unloading container Ct from chassis F"
As shown in FIG. 1, when the container Ct is loaded on the chassis F of the cargo handling vehicle V (the running status of the cargo handling vehicle V), the hook arm 7 is at the dump position (front end position). The container hook 8 is engaged with the lift bar 17 of the container Ct.

Next, as shown in FIG. 7, in order to lower the container Ct to the ground, the slide cylinder 13 is contracted to slide the hook arm 7 back to the dump release position (rear end position) with respect to the lift arm 6. 8 and 9, as the hook arm 7 moves backward, the release dog 31 abuts against the rolling roller 25 at the tip of the lever 23 of the interlock mechanism RM, and the lever 23 is moved as shown by the arrow b in FIG. Then, the rod 27 is moved forward, and the hook 20 is rotated forward and detached from the lock pin 21 as shown by an arrow b ′ in FIG. Thus, the locking device LO that is locking the lifting arm 6 and dump arm 3 Ru is held in the unlocked position, the cargo handling arm 5 allows upright rearward rotation of relative dump arm 3 .

  Next, as shown in FIG. 10, when the lift cylinder 14 is operated to extend, the cargo handling arm 5 including the lift arm 6 and the hook arm 7 rotates rearward around the pivotal support 9 point. As a result, the container Ct is guided by the left and right guide rollers 2 and moves rearward on the chassis F, the container Ct tilts backward with the rotation center of the left and right guide rollers 2 as a fulcrum, and the rear lower edge thereof lands on the ground.

  As shown in FIG. 11, when the lift cylinder 14 continues to extend and extends to the maximum and the cargo handling arm 5 reaches the rearward rotation position, the hook arm 7 is directed downward and the container Ct is lowered to the ground. If the container hook 8 at the tip of the hook arm 7 is removed from the lift bar 17, the container Ct is separated from the cargo handling vehicle V.

"When loading container Ct that has been lowered to the ground"
After the cargo handling vehicle V is stopped in tandem at an appropriate interval in front of the container Ct lowered on the ground, the lift arm 6 and the hook arm 7 are fully rotated around the support shaft 9 to the rearward rotation position. Let

The container hook 8 is engaged with the lift bar 17 of the container Ct, and the container Ct is loaded on the subframe 1 by the forward rotation of the lift arm 6 and moved forward. Finally, the slide cylinder 13 is moved. The hook arm 7 moves to the retracted position (front end position) by the extension operation of, and the loading of the container Ct into the cargo handling vehicle V is completed as shown in FIG.

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

  In the second embodiment, the engagement dogs 30, 30 provided on the left and right sides of the hook arm 7 are formed long in the front-rear direction from the vicinity of the front end of the lift arm 6 to the vicinity of the release dogs 31, 31.

  As a result, the hook arm 7 is operated by the release dogs 31, 31 from the dump position (front end position) to just before the dump release position (rear end position), that is, the levers 23, 23 of the interlocking mechanisms RM, RM. The lock devices LO and LO can be continuously held at the lock position until just before.

  Therefore, according to the second embodiment, when the container Ct is dumped, the interlocking mechanism RM can always hold the locking device LO in the locked position regardless of the position of the hook arm 7, and the container Ct Even if the hook arm 7 contracts with respect to the lift arm 6 during any dumping operation, the lift arm 6 and the dump arm 3 are always locked in a straight line so that the dumping operation of the container Ct is safe and reliable. Can be done.

  In addition, according to the second embodiment, when a container having a different front and rear length (for example, a container having a shorter front and rear length than that of the above embodiment) is mounted, the container is moved by sliding the hook arm 7. It is also possible to dump the vehicle after retracting it from the storage position (traveling position).

  As mentioned above, although the Example of this invention was described, this invention is not limited to the Example, A various Example is possible within the scope of the present invention.

1 ············ Subframe 3 ··········· Dump arm 6 ················································ ... container hook 17 ... lift bar
23 ... Lever
24 ··························· 27
30 ······································································ Container

Claims (2)

The dump arm (3) is pivotally supported on the rear part of the chassis (F) so as to be able to tilt, and the lift arm (6) is pivotally supported on the dump arm (3) so as to be able to swing up and down. A hook arm (7) having a container hook (8) that can be engaged with and disengaged from the lift bar (17) of the container (Ct) is provided at the tip of (6) so as to be slidable in the front-rear direction, and the dump arm (3) And the lift arm (6) are locked in a straight line by a locking device (LO) provided therebetween to dump the dump arm (3) and the container (Ct) mounted on the lift arm (6). In such a cargo handling vehicle,
The hook arm (7) and the locking device (LO) are connected by an interlocking mechanism (RM), and the interlocking mechanism (RM)
An engagement dog (30) fixed to the hook arm (7) and a free end is movably engaged on an engagement surface of the engagement dog (30) and swings to the lift arm (6) A lever (23) that is pivotally supported (24), and a rod (27) that connects the lever (23) and the locking device (LO). The rod (27) is connected to the hook arm ( 7) The lever (23) is reciprocated by the swing of the lever (23) accompanying the slide movement, so that the lock device (LO) can be switched between a lock position and a lock release position,
When the hook arm (7) is in the dump position for dumping the container (Ct) mounted on the dump arm (3) and the lift arm (6), the lock device (LO) is held in the lock position. A cargo handling vehicle characterized by that . In the dumping operation of the container (Ct), the interlock mechanism (RM) always holds the locking device (LO) in the locked position regardless of the position of the hook arm (7). Item 1. Cargo handling vehicle.

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